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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Procedures for interfacing to Open Firmware.
4 *
5 * Paul Mackerras August 1996.
6 * Copyright (C) 1996-2005 Paul Mackerras.
7 *
8 * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
9 * {engebret|bergner}@us.ibm.com
10 */
11
12#undef DEBUG_PROM
13
14/* we cannot use FORTIFY as it brings in new symbols */
15#define __NO_FORTIFY
16
17#include <stdarg.h>
18#include <linux/kernel.h>
19#include <linux/string.h>
20#include <linux/init.h>
21#include <linux/threads.h>
22#include <linux/spinlock.h>
23#include <linux/types.h>
24#include <linux/pci.h>
25#include <linux/proc_fs.h>
26#include <linux/delay.h>
27#include <linux/initrd.h>
28#include <linux/bitops.h>
29#include <linux/pgtable.h>
30#include <asm/prom.h>
31#include <asm/rtas.h>
32#include <asm/page.h>
33#include <asm/processor.h>
34#include <asm/irq.h>
35#include <asm/io.h>
36#include <asm/smp.h>
37#include <asm/mmu.h>
38#include <asm/iommu.h>
39#include <asm/btext.h>
40#include <asm/sections.h>
41#include <asm/machdep.h>
42#include <asm/asm-prototypes.h>
43#include <asm/ultravisor-api.h>
44
45#include <linux/linux_logo.h>
46
47/* All of prom_init bss lives here */
48#define __prombss __section(.bss.prominit)
49
50/*
51 * Eventually bump that one up
52 */
53#define DEVTREE_CHUNK_SIZE 0x100000
54
55/*
56 * This is the size of the local memory reserve map that gets copied
57 * into the boot params passed to the kernel. That size is totally
58 * flexible as the kernel just reads the list until it encounters an
59 * entry with size 0, so it can be changed without breaking binary
60 * compatibility
61 */
62#define MEM_RESERVE_MAP_SIZE 8
63
64/*
65 * prom_init() is called very early on, before the kernel text
66 * and data have been mapped to KERNELBASE. At this point the code
67 * is running at whatever address it has been loaded at.
68 * On ppc32 we compile with -mrelocatable, which means that references
69 * to extern and static variables get relocated automatically.
70 * ppc64 objects are always relocatable, we just need to relocate the
71 * TOC.
72 *
73 * Because OF may have mapped I/O devices into the area starting at
74 * KERNELBASE, particularly on CHRP machines, we can't safely call
75 * OF once the kernel has been mapped to KERNELBASE. Therefore all
76 * OF calls must be done within prom_init().
77 *
78 * ADDR is used in calls to call_prom. The 4th and following
79 * arguments to call_prom should be 32-bit values.
80 * On ppc64, 64 bit values are truncated to 32 bits (and
81 * fortunately don't get interpreted as two arguments).
82 */
83#define ADDR(x) (u32)(unsigned long)(x)
84
85#ifdef CONFIG_PPC64
86#define OF_WORKAROUNDS 0
87#else
88#define OF_WORKAROUNDS of_workarounds
89static int of_workarounds __prombss;
90#endif
91
92#define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */
93#define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */
94
95#define PROM_BUG() do { \
96 prom_printf("kernel BUG at %s line 0x%x!\n", \
97 __FILE__, __LINE__); \
98 __builtin_trap(); \
99} while (0)
100
101#ifdef DEBUG_PROM
102#define prom_debug(x...) prom_printf(x)
103#else
104#define prom_debug(x...) do { } while (0)
105#endif
106
107
108typedef u32 prom_arg_t;
109
110struct prom_args {
111 __be32 service;
112 __be32 nargs;
113 __be32 nret;
114 __be32 args[10];
115};
116
117struct prom_t {
118 ihandle root;
119 phandle chosen;
120 int cpu;
121 ihandle stdout;
122 ihandle mmumap;
123 ihandle memory;
124};
125
126struct mem_map_entry {
127 __be64 base;
128 __be64 size;
129};
130
131typedef __be32 cell_t;
132
133extern void __start(unsigned long r3, unsigned long r4, unsigned long r5,
134 unsigned long r6, unsigned long r7, unsigned long r8,
135 unsigned long r9);
136
137#ifdef CONFIG_PPC64
138extern int enter_prom(struct prom_args *args, unsigned long entry);
139#else
140static inline int enter_prom(struct prom_args *args, unsigned long entry)
141{
142 return ((int (*)(struct prom_args *))entry)(args);
143}
144#endif
145
146extern void copy_and_flush(unsigned long dest, unsigned long src,
147 unsigned long size, unsigned long offset);
148
149/* prom structure */
150static struct prom_t __prombss prom;
151
152static unsigned long __prombss prom_entry;
153
154static char __prombss of_stdout_device[256];
155static char __prombss prom_scratch[256];
156
157static unsigned long __prombss dt_header_start;
158static unsigned long __prombss dt_struct_start, dt_struct_end;
159static unsigned long __prombss dt_string_start, dt_string_end;
160
161static unsigned long __prombss prom_initrd_start, prom_initrd_end;
162
163#ifdef CONFIG_PPC64
164static int __prombss prom_iommu_force_on;
165static int __prombss prom_iommu_off;
166static unsigned long __prombss prom_tce_alloc_start;
167static unsigned long __prombss prom_tce_alloc_end;
168#endif
169
170#ifdef CONFIG_PPC_PSERIES
171static bool __prombss prom_radix_disable;
172static bool __prombss prom_radix_gtse_disable;
173static bool __prombss prom_xive_disable;
174#endif
175
176#ifdef CONFIG_PPC_SVM
177static bool __prombss prom_svm_enable;
178#endif
179
180struct platform_support {
181 bool hash_mmu;
182 bool radix_mmu;
183 bool radix_gtse;
184 bool xive;
185};
186
187/* Platforms codes are now obsolete in the kernel. Now only used within this
188 * file and ultimately gone too. Feel free to change them if you need, they
189 * are not shared with anything outside of this file anymore
190 */
191#define PLATFORM_PSERIES 0x0100
192#define PLATFORM_PSERIES_LPAR 0x0101
193#define PLATFORM_LPAR 0x0001
194#define PLATFORM_POWERMAC 0x0400
195#define PLATFORM_GENERIC 0x0500
196
197static int __prombss of_platform;
198
199static char __prombss prom_cmd_line[COMMAND_LINE_SIZE];
200
201static unsigned long __prombss prom_memory_limit;
202
203static unsigned long __prombss alloc_top;
204static unsigned long __prombss alloc_top_high;
205static unsigned long __prombss alloc_bottom;
206static unsigned long __prombss rmo_top;
207static unsigned long __prombss ram_top;
208
209static struct mem_map_entry __prombss mem_reserve_map[MEM_RESERVE_MAP_SIZE];
210static int __prombss mem_reserve_cnt;
211
212static cell_t __prombss regbuf[1024];
213
214static bool __prombss rtas_has_query_cpu_stopped;
215
216
217/*
218 * Error results ... some OF calls will return "-1" on error, some
219 * will return 0, some will return either. To simplify, here are
220 * macros to use with any ihandle or phandle return value to check if
221 * it is valid
222 */
223
224#define PROM_ERROR (-1u)
225#define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR)
226#define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR)
227
228/* Copied from lib/string.c and lib/kstrtox.c */
229
230static int __init prom_strcmp(const char *cs, const char *ct)
231{
232 unsigned char c1, c2;
233
234 while (1) {
235 c1 = *cs++;
236 c2 = *ct++;
237 if (c1 != c2)
238 return c1 < c2 ? -1 : 1;
239 if (!c1)
240 break;
241 }
242 return 0;
243}
244
245static char __init *prom_strcpy(char *dest, const char *src)
246{
247 char *tmp = dest;
248
249 while ((*dest++ = *src++) != '\0')
250 /* nothing */;
251 return tmp;
252}
253
254static int __init prom_strncmp(const char *cs, const char *ct, size_t count)
255{
256 unsigned char c1, c2;
257
258 while (count) {
259 c1 = *cs++;
260 c2 = *ct++;
261 if (c1 != c2)
262 return c1 < c2 ? -1 : 1;
263 if (!c1)
264 break;
265 count--;
266 }
267 return 0;
268}
269
270static size_t __init prom_strlen(const char *s)
271{
272 const char *sc;
273
274 for (sc = s; *sc != '\0'; ++sc)
275 /* nothing */;
276 return sc - s;
277}
278
279static int __init prom_memcmp(const void *cs, const void *ct, size_t count)
280{
281 const unsigned char *su1, *su2;
282 int res = 0;
283
284 for (su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
285 if ((res = *su1 - *su2) != 0)
286 break;
287 return res;
288}
289
290static char __init *prom_strstr(const char *s1, const char *s2)
291{
292 size_t l1, l2;
293
294 l2 = prom_strlen(s2);
295 if (!l2)
296 return (char *)s1;
297 l1 = prom_strlen(s1);
298 while (l1 >= l2) {
299 l1--;
300 if (!prom_memcmp(s1, s2, l2))
301 return (char *)s1;
302 s1++;
303 }
304 return NULL;
305}
306
307static size_t __init prom_strlcat(char *dest, const char *src, size_t count)
308{
309 size_t dsize = prom_strlen(dest);
310 size_t len = prom_strlen(src);
311 size_t res = dsize + len;
312
313 /* This would be a bug */
314 if (dsize >= count)
315 return count;
316
317 dest += dsize;
318 count -= dsize;
319 if (len >= count)
320 len = count-1;
321 memcpy(dest, src, len);
322 dest[len] = 0;
323 return res;
324
325}
326
327#ifdef CONFIG_PPC_PSERIES
328static int __init prom_strtobool(const char *s, bool *res)
329{
330 if (!s)
331 return -EINVAL;
332
333 switch (s[0]) {
334 case 'y':
335 case 'Y':
336 case '1':
337 *res = true;
338 return 0;
339 case 'n':
340 case 'N':
341 case '0':
342 *res = false;
343 return 0;
344 case 'o':
345 case 'O':
346 switch (s[1]) {
347 case 'n':
348 case 'N':
349 *res = true;
350 return 0;
351 case 'f':
352 case 'F':
353 *res = false;
354 return 0;
355 default:
356 break;
357 }
358 default:
359 break;
360 }
361
362 return -EINVAL;
363}
364#endif
365
366/* This is the one and *ONLY* place where we actually call open
367 * firmware.
368 */
369
370static int __init call_prom(const char *service, int nargs, int nret, ...)
371{
372 int i;
373 struct prom_args args;
374 va_list list;
375
376 args.service = cpu_to_be32(ADDR(service));
377 args.nargs = cpu_to_be32(nargs);
378 args.nret = cpu_to_be32(nret);
379
380 va_start(list, nret);
381 for (i = 0; i < nargs; i++)
382 args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
383 va_end(list);
384
385 for (i = 0; i < nret; i++)
386 args.args[nargs+i] = 0;
387
388 if (enter_prom(&args, prom_entry) < 0)
389 return PROM_ERROR;
390
391 return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
392}
393
394static int __init call_prom_ret(const char *service, int nargs, int nret,
395 prom_arg_t *rets, ...)
396{
397 int i;
398 struct prom_args args;
399 va_list list;
400
401 args.service = cpu_to_be32(ADDR(service));
402 args.nargs = cpu_to_be32(nargs);
403 args.nret = cpu_to_be32(nret);
404
405 va_start(list, rets);
406 for (i = 0; i < nargs; i++)
407 args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
408 va_end(list);
409
410 for (i = 0; i < nret; i++)
411 args.args[nargs+i] = 0;
412
413 if (enter_prom(&args, prom_entry) < 0)
414 return PROM_ERROR;
415
416 if (rets != NULL)
417 for (i = 1; i < nret; ++i)
418 rets[i-1] = be32_to_cpu(args.args[nargs+i]);
419
420 return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
421}
422
423
424static void __init prom_print(const char *msg)
425{
426 const char *p, *q;
427
428 if (prom.stdout == 0)
429 return;
430
431 for (p = msg; *p != 0; p = q) {
432 for (q = p; *q != 0 && *q != '\n'; ++q)
433 ;
434 if (q > p)
435 call_prom("write", 3, 1, prom.stdout, p, q - p);
436 if (*q == 0)
437 break;
438 ++q;
439 call_prom("write", 3, 1, prom.stdout, ADDR("\r\n"), 2);
440 }
441}
442
443
444/*
445 * Both prom_print_hex & prom_print_dec takes an unsigned long as input so that
446 * we do not need __udivdi3 or __umoddi3 on 32bits.
447 */
448static void __init prom_print_hex(unsigned long val)
449{
450 int i, nibbles = sizeof(val)*2;
451 char buf[sizeof(val)*2+1];
452
453 for (i = nibbles-1; i >= 0; i--) {
454 buf[i] = (val & 0xf) + '0';
455 if (buf[i] > '9')
456 buf[i] += ('a'-'0'-10);
457 val >>= 4;
458 }
459 buf[nibbles] = '\0';
460 call_prom("write", 3, 1, prom.stdout, buf, nibbles);
461}
462
463/* max number of decimal digits in an unsigned long */
464#define UL_DIGITS 21
465static void __init prom_print_dec(unsigned long val)
466{
467 int i, size;
468 char buf[UL_DIGITS+1];
469
470 for (i = UL_DIGITS-1; i >= 0; i--) {
471 buf[i] = (val % 10) + '0';
472 val = val/10;
473 if (val == 0)
474 break;
475 }
476 /* shift stuff down */
477 size = UL_DIGITS - i;
478 call_prom("write", 3, 1, prom.stdout, buf+i, size);
479}
480
481__printf(1, 2)
482static void __init prom_printf(const char *format, ...)
483{
484 const char *p, *q, *s;
485 va_list args;
486 unsigned long v;
487 long vs;
488 int n = 0;
489
490 va_start(args, format);
491 for (p = format; *p != 0; p = q) {
492 for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q)
493 ;
494 if (q > p)
495 call_prom("write", 3, 1, prom.stdout, p, q - p);
496 if (*q == 0)
497 break;
498 if (*q == '\n') {
499 ++q;
500 call_prom("write", 3, 1, prom.stdout,
501 ADDR("\r\n"), 2);
502 continue;
503 }
504 ++q;
505 if (*q == 0)
506 break;
507 while (*q == 'l') {
508 ++q;
509 ++n;
510 }
511 switch (*q) {
512 case 's':
513 ++q;
514 s = va_arg(args, const char *);
515 prom_print(s);
516 break;
517 case 'x':
518 ++q;
519 switch (n) {
520 case 0:
521 v = va_arg(args, unsigned int);
522 break;
523 case 1:
524 v = va_arg(args, unsigned long);
525 break;
526 case 2:
527 default:
528 v = va_arg(args, unsigned long long);
529 break;
530 }
531 prom_print_hex(v);
532 break;
533 case 'u':
534 ++q;
535 switch (n) {
536 case 0:
537 v = va_arg(args, unsigned int);
538 break;
539 case 1:
540 v = va_arg(args, unsigned long);
541 break;
542 case 2:
543 default:
544 v = va_arg(args, unsigned long long);
545 break;
546 }
547 prom_print_dec(v);
548 break;
549 case 'd':
550 ++q;
551 switch (n) {
552 case 0:
553 vs = va_arg(args, int);
554 break;
555 case 1:
556 vs = va_arg(args, long);
557 break;
558 case 2:
559 default:
560 vs = va_arg(args, long long);
561 break;
562 }
563 if (vs < 0) {
564 prom_print("-");
565 vs = -vs;
566 }
567 prom_print_dec(vs);
568 break;
569 }
570 }
571 va_end(args);
572}
573
574
575static unsigned int __init prom_claim(unsigned long virt, unsigned long size,
576 unsigned long align)
577{
578
579 if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) {
580 /*
581 * Old OF requires we claim physical and virtual separately
582 * and then map explicitly (assuming virtual mode)
583 */
584 int ret;
585 prom_arg_t result;
586
587 ret = call_prom_ret("call-method", 5, 2, &result,
588 ADDR("claim"), prom.memory,
589 align, size, virt);
590 if (ret != 0 || result == -1)
591 return -1;
592 ret = call_prom_ret("call-method", 5, 2, &result,
593 ADDR("claim"), prom.mmumap,
594 align, size, virt);
595 if (ret != 0) {
596 call_prom("call-method", 4, 1, ADDR("release"),
597 prom.memory, size, virt);
598 return -1;
599 }
600 /* the 0x12 is M (coherence) + PP == read/write */
601 call_prom("call-method", 6, 1,
602 ADDR("map"), prom.mmumap, 0x12, size, virt, virt);
603 return virt;
604 }
605 return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size,
606 (prom_arg_t)align);
607}
608
609static void __init __attribute__((noreturn)) prom_panic(const char *reason)
610{
611 prom_print(reason);
612 /* Do not call exit because it clears the screen on pmac
613 * it also causes some sort of double-fault on early pmacs */
614 if (of_platform == PLATFORM_POWERMAC)
615 asm("trap\n");
616
617 /* ToDo: should put up an SRC here on pSeries */
618 call_prom("exit", 0, 0);
619
620 for (;;) /* should never get here */
621 ;
622}
623
624
625static int __init prom_next_node(phandle *nodep)
626{
627 phandle node;
628
629 if ((node = *nodep) != 0
630 && (*nodep = call_prom("child", 1, 1, node)) != 0)
631 return 1;
632 if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
633 return 1;
634 for (;;) {
635 if ((node = call_prom("parent", 1, 1, node)) == 0)
636 return 0;
637 if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
638 return 1;
639 }
640}
641
642static inline int __init prom_getprop(phandle node, const char *pname,
643 void *value, size_t valuelen)
644{
645 return call_prom("getprop", 4, 1, node, ADDR(pname),
646 (u32)(unsigned long) value, (u32) valuelen);
647}
648
649static inline int __init prom_getproplen(phandle node, const char *pname)
650{
651 return call_prom("getproplen", 2, 1, node, ADDR(pname));
652}
653
654static void add_string(char **str, const char *q)
655{
656 char *p = *str;
657
658 while (*q)
659 *p++ = *q++;
660 *p++ = ' ';
661 *str = p;
662}
663
664static char *tohex(unsigned int x)
665{
666 static const char digits[] __initconst = "0123456789abcdef";
667 static char result[9] __prombss;
668 int i;
669
670 result[8] = 0;
671 i = 8;
672 do {
673 --i;
674 result[i] = digits[x & 0xf];
675 x >>= 4;
676 } while (x != 0 && i > 0);
677 return &result[i];
678}
679
680static int __init prom_setprop(phandle node, const char *nodename,
681 const char *pname, void *value, size_t valuelen)
682{
683 char cmd[256], *p;
684
685 if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL))
686 return call_prom("setprop", 4, 1, node, ADDR(pname),
687 (u32)(unsigned long) value, (u32) valuelen);
688
689 /* gah... setprop doesn't work on longtrail, have to use interpret */
690 p = cmd;
691 add_string(&p, "dev");
692 add_string(&p, nodename);
693 add_string(&p, tohex((u32)(unsigned long) value));
694 add_string(&p, tohex(valuelen));
695 add_string(&p, tohex(ADDR(pname)));
696 add_string(&p, tohex(prom_strlen(pname)));
697 add_string(&p, "property");
698 *p = 0;
699 return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd);
700}
701
702/* We can't use the standard versions because of relocation headaches. */
703#define isxdigit(c) (('0' <= (c) && (c) <= '9') \
704 || ('a' <= (c) && (c) <= 'f') \
705 || ('A' <= (c) && (c) <= 'F'))
706
707#define isdigit(c) ('0' <= (c) && (c) <= '9')
708#define islower(c) ('a' <= (c) && (c) <= 'z')
709#define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c))
710
711static unsigned long prom_strtoul(const char *cp, const char **endp)
712{
713 unsigned long result = 0, base = 10, value;
714
715 if (*cp == '0') {
716 base = 8;
717 cp++;
718 if (toupper(*cp) == 'X') {
719 cp++;
720 base = 16;
721 }
722 }
723
724 while (isxdigit(*cp) &&
725 (value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) {
726 result = result * base + value;
727 cp++;
728 }
729
730 if (endp)
731 *endp = cp;
732
733 return result;
734}
735
736static unsigned long prom_memparse(const char *ptr, const char **retptr)
737{
738 unsigned long ret = prom_strtoul(ptr, retptr);
739 int shift = 0;
740
741 /*
742 * We can't use a switch here because GCC *may* generate a
743 * jump table which won't work, because we're not running at
744 * the address we're linked at.
745 */
746 if ('G' == **retptr || 'g' == **retptr)
747 shift = 30;
748
749 if ('M' == **retptr || 'm' == **retptr)
750 shift = 20;
751
752 if ('K' == **retptr || 'k' == **retptr)
753 shift = 10;
754
755 if (shift) {
756 ret <<= shift;
757 (*retptr)++;
758 }
759
760 return ret;
761}
762
763/*
764 * Early parsing of the command line passed to the kernel, used for
765 * "mem=x" and the options that affect the iommu
766 */
767static void __init early_cmdline_parse(void)
768{
769 const char *opt;
770
771 char *p;
772 int l = 0;
773
774 prom_cmd_line[0] = 0;
775 p = prom_cmd_line;
776
777 if (!IS_ENABLED(CONFIG_CMDLINE_FORCE) && (long)prom.chosen > 0)
778 l = prom_getprop(prom.chosen, "bootargs", p, COMMAND_LINE_SIZE-1);
779
780 if (IS_ENABLED(CONFIG_CMDLINE_EXTEND) || l <= 0 || p[0] == '\0')
781 prom_strlcat(prom_cmd_line, " " CONFIG_CMDLINE,
782 sizeof(prom_cmd_line));
783
784 prom_printf("command line: %s\n", prom_cmd_line);
785
786#ifdef CONFIG_PPC64
787 opt = prom_strstr(prom_cmd_line, "iommu=");
788 if (opt) {
789 prom_printf("iommu opt is: %s\n", opt);
790 opt += 6;
791 while (*opt && *opt == ' ')
792 opt++;
793 if (!prom_strncmp(opt, "off", 3))
794 prom_iommu_off = 1;
795 else if (!prom_strncmp(opt, "force", 5))
796 prom_iommu_force_on = 1;
797 }
798#endif
799 opt = prom_strstr(prom_cmd_line, "mem=");
800 if (opt) {
801 opt += 4;
802 prom_memory_limit = prom_memparse(opt, (const char **)&opt);
803#ifdef CONFIG_PPC64
804 /* Align to 16 MB == size of ppc64 large page */
805 prom_memory_limit = ALIGN(prom_memory_limit, 0x1000000);
806#endif
807 }
808
809#ifdef CONFIG_PPC_PSERIES
810 prom_radix_disable = !IS_ENABLED(CONFIG_PPC_RADIX_MMU_DEFAULT);
811 opt = prom_strstr(prom_cmd_line, "disable_radix");
812 if (opt) {
813 opt += 13;
814 if (*opt && *opt == '=') {
815 bool val;
816
817 if (prom_strtobool(++opt, &val))
818 prom_radix_disable = false;
819 else
820 prom_radix_disable = val;
821 } else
822 prom_radix_disable = true;
823 }
824 if (prom_radix_disable)
825 prom_debug("Radix disabled from cmdline\n");
826
827 opt = prom_strstr(prom_cmd_line, "radix_hcall_invalidate=on");
828 if (opt) {
829 prom_radix_gtse_disable = true;
830 prom_debug("Radix GTSE disabled from cmdline\n");
831 }
832
833 opt = prom_strstr(prom_cmd_line, "xive=off");
834 if (opt) {
835 prom_xive_disable = true;
836 prom_debug("XIVE disabled from cmdline\n");
837 }
838#endif /* CONFIG_PPC_PSERIES */
839
840#ifdef CONFIG_PPC_SVM
841 opt = prom_strstr(prom_cmd_line, "svm=");
842 if (opt) {
843 bool val;
844
845 opt += sizeof("svm=") - 1;
846 if (!prom_strtobool(opt, &val))
847 prom_svm_enable = val;
848 }
849#endif /* CONFIG_PPC_SVM */
850}
851
852#ifdef CONFIG_PPC_PSERIES
853/*
854 * The architecture vector has an array of PVR mask/value pairs,
855 * followed by # option vectors - 1, followed by the option vectors.
856 *
857 * See prom.h for the definition of the bits specified in the
858 * architecture vector.
859 */
860
861/* Firmware expects the value to be n - 1, where n is the # of vectors */
862#define NUM_VECTORS(n) ((n) - 1)
863
864/*
865 * Firmware expects 1 + n - 2, where n is the length of the option vector in
866 * bytes. The 1 accounts for the length byte itself, the - 2 .. ?
867 */
868#define VECTOR_LENGTH(n) (1 + (n) - 2)
869
870struct option_vector1 {
871 u8 byte1;
872 u8 arch_versions;
873 u8 arch_versions3;
874} __packed;
875
876struct option_vector2 {
877 u8 byte1;
878 __be16 reserved;
879 __be32 real_base;
880 __be32 real_size;
881 __be32 virt_base;
882 __be32 virt_size;
883 __be32 load_base;
884 __be32 min_rma;
885 __be32 min_load;
886 u8 min_rma_percent;
887 u8 max_pft_size;
888} __packed;
889
890struct option_vector3 {
891 u8 byte1;
892 u8 byte2;
893} __packed;
894
895struct option_vector4 {
896 u8 byte1;
897 u8 min_vp_cap;
898} __packed;
899
900struct option_vector5 {
901 u8 byte1;
902 u8 byte2;
903 u8 byte3;
904 u8 cmo;
905 u8 associativity;
906 u8 bin_opts;
907 u8 micro_checkpoint;
908 u8 reserved0;
909 __be32 max_cpus;
910 __be16 papr_level;
911 __be16 reserved1;
912 u8 platform_facilities;
913 u8 reserved2;
914 __be16 reserved3;
915 u8 subprocessors;
916 u8 byte22;
917 u8 intarch;
918 u8 mmu;
919 u8 hash_ext;
920 u8 radix_ext;
921} __packed;
922
923struct option_vector6 {
924 u8 reserved;
925 u8 secondary_pteg;
926 u8 os_name;
927} __packed;
928
929struct ibm_arch_vec {
930 struct { u32 mask, val; } pvrs[14];
931
932 u8 num_vectors;
933
934 u8 vec1_len;
935 struct option_vector1 vec1;
936
937 u8 vec2_len;
938 struct option_vector2 vec2;
939
940 u8 vec3_len;
941 struct option_vector3 vec3;
942
943 u8 vec4_len;
944 struct option_vector4 vec4;
945
946 u8 vec5_len;
947 struct option_vector5 vec5;
948
949 u8 vec6_len;
950 struct option_vector6 vec6;
951} __packed;
952
953static const struct ibm_arch_vec ibm_architecture_vec_template __initconst = {
954 .pvrs = {
955 {
956 .mask = cpu_to_be32(0xfffe0000), /* POWER5/POWER5+ */
957 .val = cpu_to_be32(0x003a0000),
958 },
959 {
960 .mask = cpu_to_be32(0xffff0000), /* POWER6 */
961 .val = cpu_to_be32(0x003e0000),
962 },
963 {
964 .mask = cpu_to_be32(0xffff0000), /* POWER7 */
965 .val = cpu_to_be32(0x003f0000),
966 },
967 {
968 .mask = cpu_to_be32(0xffff0000), /* POWER8E */
969 .val = cpu_to_be32(0x004b0000),
970 },
971 {
972 .mask = cpu_to_be32(0xffff0000), /* POWER8NVL */
973 .val = cpu_to_be32(0x004c0000),
974 },
975 {
976 .mask = cpu_to_be32(0xffff0000), /* POWER8 */
977 .val = cpu_to_be32(0x004d0000),
978 },
979 {
980 .mask = cpu_to_be32(0xffff0000), /* POWER9 */
981 .val = cpu_to_be32(0x004e0000),
982 },
983 {
984 .mask = cpu_to_be32(0xffff0000), /* POWER10 */
985 .val = cpu_to_be32(0x00800000),
986 },
987 {
988 .mask = cpu_to_be32(0xffffffff), /* all 3.1-compliant */
989 .val = cpu_to_be32(0x0f000006),
990 },
991 {
992 .mask = cpu_to_be32(0xffffffff), /* all 3.00-compliant */
993 .val = cpu_to_be32(0x0f000005),
994 },
995 {
996 .mask = cpu_to_be32(0xffffffff), /* all 2.07-compliant */
997 .val = cpu_to_be32(0x0f000004),
998 },
999 {
1000 .mask = cpu_to_be32(0xffffffff), /* all 2.06-compliant */
1001 .val = cpu_to_be32(0x0f000003),
1002 },
1003 {
1004 .mask = cpu_to_be32(0xffffffff), /* all 2.05-compliant */
1005 .val = cpu_to_be32(0x0f000002),
1006 },
1007 {
1008 .mask = cpu_to_be32(0xfffffffe), /* all 2.04-compliant and earlier */
1009 .val = cpu_to_be32(0x0f000001),
1010 },
1011 },
1012
1013 .num_vectors = NUM_VECTORS(6),
1014
1015 .vec1_len = VECTOR_LENGTH(sizeof(struct option_vector1)),
1016 .vec1 = {
1017 .byte1 = 0,
1018 .arch_versions = OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 |
1019 OV1_PPC_2_04 | OV1_PPC_2_05 | OV1_PPC_2_06 | OV1_PPC_2_07,
1020 .arch_versions3 = OV1_PPC_3_00 | OV1_PPC_3_1,
1021 },
1022
1023 .vec2_len = VECTOR_LENGTH(sizeof(struct option_vector2)),
1024 /* option vector 2: Open Firmware options supported */
1025 .vec2 = {
1026 .byte1 = OV2_REAL_MODE,
1027 .reserved = 0,
1028 .real_base = cpu_to_be32(0xffffffff),
1029 .real_size = cpu_to_be32(0xffffffff),
1030 .virt_base = cpu_to_be32(0xffffffff),
1031 .virt_size = cpu_to_be32(0xffffffff),
1032 .load_base = cpu_to_be32(0xffffffff),
1033 .min_rma = cpu_to_be32(512), /* 512MB min RMA */
1034 .min_load = cpu_to_be32(0xffffffff), /* full client load */
1035 .min_rma_percent = 0, /* min RMA percentage of total RAM */
1036 .max_pft_size = 48, /* max log_2(hash table size) */
1037 },
1038
1039 .vec3_len = VECTOR_LENGTH(sizeof(struct option_vector3)),
1040 /* option vector 3: processor options supported */
1041 .vec3 = {
1042 .byte1 = 0, /* don't ignore, don't halt */
1043 .byte2 = OV3_FP | OV3_VMX | OV3_DFP,
1044 },
1045
1046 .vec4_len = VECTOR_LENGTH(sizeof(struct option_vector4)),
1047 /* option vector 4: IBM PAPR implementation */
1048 .vec4 = {
1049 .byte1 = 0, /* don't halt */
1050 .min_vp_cap = OV4_MIN_ENT_CAP, /* minimum VP entitled capacity */
1051 },
1052
1053 .vec5_len = VECTOR_LENGTH(sizeof(struct option_vector5)),
1054 /* option vector 5: PAPR/OF options */
1055 .vec5 = {
1056 .byte1 = 0, /* don't ignore, don't halt */
1057 .byte2 = OV5_FEAT(OV5_LPAR) | OV5_FEAT(OV5_SPLPAR) | OV5_FEAT(OV5_LARGE_PAGES) |
1058 OV5_FEAT(OV5_DRCONF_MEMORY) | OV5_FEAT(OV5_DONATE_DEDICATE_CPU) |
1059#ifdef CONFIG_PCI_MSI
1060 /* PCIe/MSI support. Without MSI full PCIe is not supported */
1061 OV5_FEAT(OV5_MSI),
1062#else
1063 0,
1064#endif
1065 .byte3 = 0,
1066 .cmo =
1067#ifdef CONFIG_PPC_SMLPAR
1068 OV5_FEAT(OV5_CMO) | OV5_FEAT(OV5_XCMO),
1069#else
1070 0,
1071#endif
1072 .associativity = OV5_FEAT(OV5_TYPE1_AFFINITY) | OV5_FEAT(OV5_PRRN),
1073 .bin_opts = OV5_FEAT(OV5_RESIZE_HPT) | OV5_FEAT(OV5_HP_EVT),
1074 .micro_checkpoint = 0,
1075 .reserved0 = 0,
1076 .max_cpus = cpu_to_be32(NR_CPUS), /* number of cores supported */
1077 .papr_level = 0,
1078 .reserved1 = 0,
1079 .platform_facilities = OV5_FEAT(OV5_PFO_HW_RNG) | OV5_FEAT(OV5_PFO_HW_ENCR) | OV5_FEAT(OV5_PFO_HW_842),
1080 .reserved2 = 0,
1081 .reserved3 = 0,
1082 .subprocessors = 1,
1083 .byte22 = OV5_FEAT(OV5_DRMEM_V2) | OV5_FEAT(OV5_DRC_INFO),
1084 .intarch = 0,
1085 .mmu = 0,
1086 .hash_ext = 0,
1087 .radix_ext = 0,
1088 },
1089
1090 /* option vector 6: IBM PAPR hints */
1091 .vec6_len = VECTOR_LENGTH(sizeof(struct option_vector6)),
1092 .vec6 = {
1093 .reserved = 0,
1094 .secondary_pteg = 0,
1095 .os_name = OV6_LINUX,
1096 },
1097};
1098
1099static struct ibm_arch_vec __prombss ibm_architecture_vec ____cacheline_aligned;
1100
1101/* Old method - ELF header with PT_NOTE sections only works on BE */
1102#ifdef __BIG_ENDIAN__
1103static const struct fake_elf {
1104 Elf32_Ehdr elfhdr;
1105 Elf32_Phdr phdr[2];
1106 struct chrpnote {
1107 u32 namesz;
1108 u32 descsz;
1109 u32 type;
1110 char name[8]; /* "PowerPC" */
1111 struct chrpdesc {
1112 u32 real_mode;
1113 u32 real_base;
1114 u32 real_size;
1115 u32 virt_base;
1116 u32 virt_size;
1117 u32 load_base;
1118 } chrpdesc;
1119 } chrpnote;
1120 struct rpanote {
1121 u32 namesz;
1122 u32 descsz;
1123 u32 type;
1124 char name[24]; /* "IBM,RPA-Client-Config" */
1125 struct rpadesc {
1126 u32 lpar_affinity;
1127 u32 min_rmo_size;
1128 u32 min_rmo_percent;
1129 u32 max_pft_size;
1130 u32 splpar;
1131 u32 min_load;
1132 u32 new_mem_def;
1133 u32 ignore_me;
1134 } rpadesc;
1135 } rpanote;
1136} fake_elf __initconst = {
1137 .elfhdr = {
1138 .e_ident = { 0x7f, 'E', 'L', 'F',
1139 ELFCLASS32, ELFDATA2MSB, EV_CURRENT },
1140 .e_type = ET_EXEC, /* yeah right */
1141 .e_machine = EM_PPC,
1142 .e_version = EV_CURRENT,
1143 .e_phoff = offsetof(struct fake_elf, phdr),
1144 .e_phentsize = sizeof(Elf32_Phdr),
1145 .e_phnum = 2
1146 },
1147 .phdr = {
1148 [0] = {
1149 .p_type = PT_NOTE,
1150 .p_offset = offsetof(struct fake_elf, chrpnote),
1151 .p_filesz = sizeof(struct chrpnote)
1152 }, [1] = {
1153 .p_type = PT_NOTE,
1154 .p_offset = offsetof(struct fake_elf, rpanote),
1155 .p_filesz = sizeof(struct rpanote)
1156 }
1157 },
1158 .chrpnote = {
1159 .namesz = sizeof("PowerPC"),
1160 .descsz = sizeof(struct chrpdesc),
1161 .type = 0x1275,
1162 .name = "PowerPC",
1163 .chrpdesc = {
1164 .real_mode = ~0U, /* ~0 means "don't care" */
1165 .real_base = ~0U,
1166 .real_size = ~0U,
1167 .virt_base = ~0U,
1168 .virt_size = ~0U,
1169 .load_base = ~0U
1170 },
1171 },
1172 .rpanote = {
1173 .namesz = sizeof("IBM,RPA-Client-Config"),
1174 .descsz = sizeof(struct rpadesc),
1175 .type = 0x12759999,
1176 .name = "IBM,RPA-Client-Config",
1177 .rpadesc = {
1178 .lpar_affinity = 0,
1179 .min_rmo_size = 64, /* in megabytes */
1180 .min_rmo_percent = 0,
1181 .max_pft_size = 48, /* 2^48 bytes max PFT size */
1182 .splpar = 1,
1183 .min_load = ~0U,
1184 .new_mem_def = 0
1185 }
1186 }
1187};
1188#endif /* __BIG_ENDIAN__ */
1189
1190static int __init prom_count_smt_threads(void)
1191{
1192 phandle node;
1193 char type[64];
1194 unsigned int plen;
1195
1196 /* Pick up th first CPU node we can find */
1197 for (node = 0; prom_next_node(&node); ) {
1198 type[0] = 0;
1199 prom_getprop(node, "device_type", type, sizeof(type));
1200
1201 if (prom_strcmp(type, "cpu"))
1202 continue;
1203 /*
1204 * There is an entry for each smt thread, each entry being
1205 * 4 bytes long. All cpus should have the same number of
1206 * smt threads, so return after finding the first.
1207 */
1208 plen = prom_getproplen(node, "ibm,ppc-interrupt-server#s");
1209 if (plen == PROM_ERROR)
1210 break;
1211 plen >>= 2;
1212 prom_debug("Found %lu smt threads per core\n", (unsigned long)plen);
1213
1214 /* Sanity check */
1215 if (plen < 1 || plen > 64) {
1216 prom_printf("Threads per core %lu out of bounds, assuming 1\n",
1217 (unsigned long)plen);
1218 return 1;
1219 }
1220 return plen;
1221 }
1222 prom_debug("No threads found, assuming 1 per core\n");
1223
1224 return 1;
1225
1226}
1227
1228static void __init prom_parse_mmu_model(u8 val,
1229 struct platform_support *support)
1230{
1231 switch (val) {
1232 case OV5_FEAT(OV5_MMU_DYNAMIC):
1233 case OV5_FEAT(OV5_MMU_EITHER): /* Either Available */
1234 prom_debug("MMU - either supported\n");
1235 support->radix_mmu = !prom_radix_disable;
1236 support->hash_mmu = true;
1237 break;
1238 case OV5_FEAT(OV5_MMU_RADIX): /* Only Radix */
1239 prom_debug("MMU - radix only\n");
1240 if (prom_radix_disable) {
1241 /*
1242 * If we __have__ to do radix, we're better off ignoring
1243 * the command line rather than not booting.
1244 */
1245 prom_printf("WARNING: Ignoring cmdline option disable_radix\n");
1246 }
1247 support->radix_mmu = true;
1248 break;
1249 case OV5_FEAT(OV5_MMU_HASH):
1250 prom_debug("MMU - hash only\n");
1251 support->hash_mmu = true;
1252 break;
1253 default:
1254 prom_debug("Unknown mmu support option: 0x%x\n", val);
1255 break;
1256 }
1257}
1258
1259static void __init prom_parse_xive_model(u8 val,
1260 struct platform_support *support)
1261{
1262 switch (val) {
1263 case OV5_FEAT(OV5_XIVE_EITHER): /* Either Available */
1264 prom_debug("XIVE - either mode supported\n");
1265 support->xive = !prom_xive_disable;
1266 break;
1267 case OV5_FEAT(OV5_XIVE_EXPLOIT): /* Only Exploitation mode */
1268 prom_debug("XIVE - exploitation mode supported\n");
1269 if (prom_xive_disable) {
1270 /*
1271 * If we __have__ to do XIVE, we're better off ignoring
1272 * the command line rather than not booting.
1273 */
1274 prom_printf("WARNING: Ignoring cmdline option xive=off\n");
1275 }
1276 support->xive = true;
1277 break;
1278 case OV5_FEAT(OV5_XIVE_LEGACY): /* Only Legacy mode */
1279 prom_debug("XIVE - legacy mode supported\n");
1280 break;
1281 default:
1282 prom_debug("Unknown xive support option: 0x%x\n", val);
1283 break;
1284 }
1285}
1286
1287static void __init prom_parse_platform_support(u8 index, u8 val,
1288 struct platform_support *support)
1289{
1290 switch (index) {
1291 case OV5_INDX(OV5_MMU_SUPPORT): /* MMU Model */
1292 prom_parse_mmu_model(val & OV5_FEAT(OV5_MMU_SUPPORT), support);
1293 break;
1294 case OV5_INDX(OV5_RADIX_GTSE): /* Radix Extensions */
1295 if (val & OV5_FEAT(OV5_RADIX_GTSE))
1296 support->radix_gtse = !prom_radix_gtse_disable;
1297 break;
1298 case OV5_INDX(OV5_XIVE_SUPPORT): /* Interrupt mode */
1299 prom_parse_xive_model(val & OV5_FEAT(OV5_XIVE_SUPPORT),
1300 support);
1301 break;
1302 }
1303}
1304
1305static void __init prom_check_platform_support(void)
1306{
1307 struct platform_support supported = {
1308 .hash_mmu = false,
1309 .radix_mmu = false,
1310 .radix_gtse = false,
1311 .xive = false
1312 };
1313 int prop_len = prom_getproplen(prom.chosen,
1314 "ibm,arch-vec-5-platform-support");
1315
1316 /*
1317 * First copy the architecture vec template
1318 *
1319 * use memcpy() instead of *vec = *vec_template so that GCC replaces it
1320 * by __memcpy() when KASAN is active
1321 */
1322 memcpy(&ibm_architecture_vec, &ibm_architecture_vec_template,
1323 sizeof(ibm_architecture_vec));
1324
1325 if (prop_len > 1) {
1326 int i;
1327 u8 vec[8];
1328 prom_debug("Found ibm,arch-vec-5-platform-support, len: %d\n",
1329 prop_len);
1330 if (prop_len > sizeof(vec))
1331 prom_printf("WARNING: ibm,arch-vec-5-platform-support longer than expected (len: %d)\n",
1332 prop_len);
1333 prom_getprop(prom.chosen, "ibm,arch-vec-5-platform-support",
1334 &vec, sizeof(vec));
1335 for (i = 0; i < sizeof(vec); i += 2) {
1336 prom_debug("%d: index = 0x%x val = 0x%x\n", i / 2
1337 , vec[i]
1338 , vec[i + 1]);
1339 prom_parse_platform_support(vec[i], vec[i + 1],
1340 &supported);
1341 }
1342 }
1343
1344 if (supported.radix_mmu && IS_ENABLED(CONFIG_PPC_RADIX_MMU)) {
1345 /* Radix preferred - Check if GTSE is also supported */
1346 prom_debug("Asking for radix\n");
1347 ibm_architecture_vec.vec5.mmu = OV5_FEAT(OV5_MMU_RADIX);
1348 if (supported.radix_gtse)
1349 ibm_architecture_vec.vec5.radix_ext =
1350 OV5_FEAT(OV5_RADIX_GTSE);
1351 else
1352 prom_debug("Radix GTSE isn't supported\n");
1353 } else if (supported.hash_mmu) {
1354 /* Default to hash mmu (if we can) */
1355 prom_debug("Asking for hash\n");
1356 ibm_architecture_vec.vec5.mmu = OV5_FEAT(OV5_MMU_HASH);
1357 } else {
1358 /* We're probably on a legacy hypervisor */
1359 prom_debug("Assuming legacy hash support\n");
1360 }
1361
1362 if (supported.xive) {
1363 prom_debug("Asking for XIVE\n");
1364 ibm_architecture_vec.vec5.intarch = OV5_FEAT(OV5_XIVE_EXPLOIT);
1365 }
1366}
1367
1368static void __init prom_send_capabilities(void)
1369{
1370 ihandle root;
1371 prom_arg_t ret;
1372 u32 cores;
1373
1374 /* Check ibm,arch-vec-5-platform-support and fixup vec5 if required */
1375 prom_check_platform_support();
1376
1377 root = call_prom("open", 1, 1, ADDR("/"));
1378 if (root != 0) {
1379 /* We need to tell the FW about the number of cores we support.
1380 *
1381 * To do that, we count the number of threads on the first core
1382 * (we assume this is the same for all cores) and use it to
1383 * divide NR_CPUS.
1384 */
1385
1386 cores = DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads());
1387 prom_printf("Max number of cores passed to firmware: %u (NR_CPUS = %d)\n",
1388 cores, NR_CPUS);
1389
1390 ibm_architecture_vec.vec5.max_cpus = cpu_to_be32(cores);
1391
1392 /* try calling the ibm,client-architecture-support method */
1393 prom_printf("Calling ibm,client-architecture-support...");
1394 if (call_prom_ret("call-method", 3, 2, &ret,
1395 ADDR("ibm,client-architecture-support"),
1396 root,
1397 ADDR(&ibm_architecture_vec)) == 0) {
1398 /* the call exists... */
1399 if (ret)
1400 prom_printf("\nWARNING: ibm,client-architecture"
1401 "-support call FAILED!\n");
1402 call_prom("close", 1, 0, root);
1403 prom_printf(" done\n");
1404 return;
1405 }
1406 call_prom("close", 1, 0, root);
1407 prom_printf(" not implemented\n");
1408 }
1409
1410#ifdef __BIG_ENDIAN__
1411 {
1412 ihandle elfloader;
1413
1414 /* no ibm,client-architecture-support call, try the old way */
1415 elfloader = call_prom("open", 1, 1,
1416 ADDR("/packages/elf-loader"));
1417 if (elfloader == 0) {
1418 prom_printf("couldn't open /packages/elf-loader\n");
1419 return;
1420 }
1421 call_prom("call-method", 3, 1, ADDR("process-elf-header"),
1422 elfloader, ADDR(&fake_elf));
1423 call_prom("close", 1, 0, elfloader);
1424 }
1425#endif /* __BIG_ENDIAN__ */
1426}
1427#endif /* CONFIG_PPC_PSERIES */
1428
1429/*
1430 * Memory allocation strategy... our layout is normally:
1431 *
1432 * at 14Mb or more we have vmlinux, then a gap and initrd. In some
1433 * rare cases, initrd might end up being before the kernel though.
1434 * We assume this won't override the final kernel at 0, we have no
1435 * provision to handle that in this version, but it should hopefully
1436 * never happen.
1437 *
1438 * alloc_top is set to the top of RMO, eventually shrink down if the
1439 * TCEs overlap
1440 *
1441 * alloc_bottom is set to the top of kernel/initrd
1442 *
1443 * from there, allocations are done this way : rtas is allocated
1444 * topmost, and the device-tree is allocated from the bottom. We try
1445 * to grow the device-tree allocation as we progress. If we can't,
1446 * then we fail, we don't currently have a facility to restart
1447 * elsewhere, but that shouldn't be necessary.
1448 *
1449 * Note that calls to reserve_mem have to be done explicitly, memory
1450 * allocated with either alloc_up or alloc_down isn't automatically
1451 * reserved.
1452 */
1453
1454
1455/*
1456 * Allocates memory in the RMO upward from the kernel/initrd
1457 *
1458 * When align is 0, this is a special case, it means to allocate in place
1459 * at the current location of alloc_bottom or fail (that is basically
1460 * extending the previous allocation). Used for the device-tree flattening
1461 */
1462static unsigned long __init alloc_up(unsigned long size, unsigned long align)
1463{
1464 unsigned long base = alloc_bottom;
1465 unsigned long addr = 0;
1466
1467 if (align)
1468 base = ALIGN(base, align);
1469 prom_debug("%s(%lx, %lx)\n", __func__, size, align);
1470 if (ram_top == 0)
1471 prom_panic("alloc_up() called with mem not initialized\n");
1472
1473 if (align)
1474 base = ALIGN(alloc_bottom, align);
1475 else
1476 base = alloc_bottom;
1477
1478 for(; (base + size) <= alloc_top;
1479 base = ALIGN(base + 0x100000, align)) {
1480 prom_debug(" trying: 0x%lx\n\r", base);
1481 addr = (unsigned long)prom_claim(base, size, 0);
1482 if (addr != PROM_ERROR && addr != 0)
1483 break;
1484 addr = 0;
1485 if (align == 0)
1486 break;
1487 }
1488 if (addr == 0)
1489 return 0;
1490 alloc_bottom = addr + size;
1491
1492 prom_debug(" -> %lx\n", addr);
1493 prom_debug(" alloc_bottom : %lx\n", alloc_bottom);
1494 prom_debug(" alloc_top : %lx\n", alloc_top);
1495 prom_debug(" alloc_top_hi : %lx\n", alloc_top_high);
1496 prom_debug(" rmo_top : %lx\n", rmo_top);
1497 prom_debug(" ram_top : %lx\n", ram_top);
1498
1499 return addr;
1500}
1501
1502/*
1503 * Allocates memory downward, either from top of RMO, or if highmem
1504 * is set, from the top of RAM. Note that this one doesn't handle
1505 * failures. It does claim memory if highmem is not set.
1506 */
1507static unsigned long __init alloc_down(unsigned long size, unsigned long align,
1508 int highmem)
1509{
1510 unsigned long base, addr = 0;
1511
1512 prom_debug("%s(%lx, %lx, %s)\n", __func__, size, align,
1513 highmem ? "(high)" : "(low)");
1514 if (ram_top == 0)
1515 prom_panic("alloc_down() called with mem not initialized\n");
1516
1517 if (highmem) {
1518 /* Carve out storage for the TCE table. */
1519 addr = ALIGN_DOWN(alloc_top_high - size, align);
1520 if (addr <= alloc_bottom)
1521 return 0;
1522 /* Will we bump into the RMO ? If yes, check out that we
1523 * didn't overlap existing allocations there, if we did,
1524 * we are dead, we must be the first in town !
1525 */
1526 if (addr < rmo_top) {
1527 /* Good, we are first */
1528 if (alloc_top == rmo_top)
1529 alloc_top = rmo_top = addr;
1530 else
1531 return 0;
1532 }
1533 alloc_top_high = addr;
1534 goto bail;
1535 }
1536
1537 base = ALIGN_DOWN(alloc_top - size, align);
1538 for (; base > alloc_bottom;
1539 base = ALIGN_DOWN(base - 0x100000, align)) {
1540 prom_debug(" trying: 0x%lx\n\r", base);
1541 addr = (unsigned long)prom_claim(base, size, 0);
1542 if (addr != PROM_ERROR && addr != 0)
1543 break;
1544 addr = 0;
1545 }
1546 if (addr == 0)
1547 return 0;
1548 alloc_top = addr;
1549
1550 bail:
1551 prom_debug(" -> %lx\n", addr);
1552 prom_debug(" alloc_bottom : %lx\n", alloc_bottom);
1553 prom_debug(" alloc_top : %lx\n", alloc_top);
1554 prom_debug(" alloc_top_hi : %lx\n", alloc_top_high);
1555 prom_debug(" rmo_top : %lx\n", rmo_top);
1556 prom_debug(" ram_top : %lx\n", ram_top);
1557
1558 return addr;
1559}
1560
1561/*
1562 * Parse a "reg" cell
1563 */
1564static unsigned long __init prom_next_cell(int s, cell_t **cellp)
1565{
1566 cell_t *p = *cellp;
1567 unsigned long r = 0;
1568
1569 /* Ignore more than 2 cells */
1570 while (s > sizeof(unsigned long) / 4) {
1571 p++;
1572 s--;
1573 }
1574 r = be32_to_cpu(*p++);
1575#ifdef CONFIG_PPC64
1576 if (s > 1) {
1577 r <<= 32;
1578 r |= be32_to_cpu(*(p++));
1579 }
1580#endif
1581 *cellp = p;
1582 return r;
1583}
1584
1585/*
1586 * Very dumb function for adding to the memory reserve list, but
1587 * we don't need anything smarter at this point
1588 *
1589 * XXX Eventually check for collisions. They should NEVER happen.
1590 * If problems seem to show up, it would be a good start to track
1591 * them down.
1592 */
1593static void __init reserve_mem(u64 base, u64 size)
1594{
1595 u64 top = base + size;
1596 unsigned long cnt = mem_reserve_cnt;
1597
1598 if (size == 0)
1599 return;
1600
1601 /* We need to always keep one empty entry so that we
1602 * have our terminator with "size" set to 0 since we are
1603 * dumb and just copy this entire array to the boot params
1604 */
1605 base = ALIGN_DOWN(base, PAGE_SIZE);
1606 top = ALIGN(top, PAGE_SIZE);
1607 size = top - base;
1608
1609 if (cnt >= (MEM_RESERVE_MAP_SIZE - 1))
1610 prom_panic("Memory reserve map exhausted !\n");
1611 mem_reserve_map[cnt].base = cpu_to_be64(base);
1612 mem_reserve_map[cnt].size = cpu_to_be64(size);
1613 mem_reserve_cnt = cnt + 1;
1614}
1615
1616/*
1617 * Initialize memory allocation mechanism, parse "memory" nodes and
1618 * obtain that way the top of memory and RMO to setup out local allocator
1619 */
1620static void __init prom_init_mem(void)
1621{
1622 phandle node;
1623 char type[64];
1624 unsigned int plen;
1625 cell_t *p, *endp;
1626 __be32 val;
1627 u32 rac, rsc;
1628
1629 /*
1630 * We iterate the memory nodes to find
1631 * 1) top of RMO (first node)
1632 * 2) top of memory
1633 */
1634 val = cpu_to_be32(2);
1635 prom_getprop(prom.root, "#address-cells", &val, sizeof(val));
1636 rac = be32_to_cpu(val);
1637 val = cpu_to_be32(1);
1638 prom_getprop(prom.root, "#size-cells", &val, sizeof(rsc));
1639 rsc = be32_to_cpu(val);
1640 prom_debug("root_addr_cells: %x\n", rac);
1641 prom_debug("root_size_cells: %x\n", rsc);
1642
1643 prom_debug("scanning memory:\n");
1644
1645 for (node = 0; prom_next_node(&node); ) {
1646 type[0] = 0;
1647 prom_getprop(node, "device_type", type, sizeof(type));
1648
1649 if (type[0] == 0) {
1650 /*
1651 * CHRP Longtrail machines have no device_type
1652 * on the memory node, so check the name instead...
1653 */
1654 prom_getprop(node, "name", type, sizeof(type));
1655 }
1656 if (prom_strcmp(type, "memory"))
1657 continue;
1658
1659 plen = prom_getprop(node, "reg", regbuf, sizeof(regbuf));
1660 if (plen > sizeof(regbuf)) {
1661 prom_printf("memory node too large for buffer !\n");
1662 plen = sizeof(regbuf);
1663 }
1664 p = regbuf;
1665 endp = p + (plen / sizeof(cell_t));
1666
1667#ifdef DEBUG_PROM
1668 memset(prom_scratch, 0, sizeof(prom_scratch));
1669 call_prom("package-to-path", 3, 1, node, prom_scratch,
1670 sizeof(prom_scratch) - 1);
1671 prom_debug(" node %s :\n", prom_scratch);
1672#endif /* DEBUG_PROM */
1673
1674 while ((endp - p) >= (rac + rsc)) {
1675 unsigned long base, size;
1676
1677 base = prom_next_cell(rac, &p);
1678 size = prom_next_cell(rsc, &p);
1679
1680 if (size == 0)
1681 continue;
1682 prom_debug(" %lx %lx\n", base, size);
1683 if (base == 0 && (of_platform & PLATFORM_LPAR))
1684 rmo_top = size;
1685 if ((base + size) > ram_top)
1686 ram_top = base + size;
1687 }
1688 }
1689
1690 alloc_bottom = PAGE_ALIGN((unsigned long)&_end + 0x4000);
1691
1692 /*
1693 * If prom_memory_limit is set we reduce the upper limits *except* for
1694 * alloc_top_high. This must be the real top of RAM so we can put
1695 * TCE's up there.
1696 */
1697
1698 alloc_top_high = ram_top;
1699
1700 if (prom_memory_limit) {
1701 if (prom_memory_limit <= alloc_bottom) {
1702 prom_printf("Ignoring mem=%lx <= alloc_bottom.\n",
1703 prom_memory_limit);
1704 prom_memory_limit = 0;
1705 } else if (prom_memory_limit >= ram_top) {
1706 prom_printf("Ignoring mem=%lx >= ram_top.\n",
1707 prom_memory_limit);
1708 prom_memory_limit = 0;
1709 } else {
1710 ram_top = prom_memory_limit;
1711 rmo_top = min(rmo_top, prom_memory_limit);
1712 }
1713 }
1714
1715 /*
1716 * Setup our top alloc point, that is top of RMO or top of
1717 * segment 0 when running non-LPAR.
1718 * Some RS64 machines have buggy firmware where claims up at
1719 * 1GB fail. Cap at 768MB as a workaround.
1720 * Since 768MB is plenty of room, and we need to cap to something
1721 * reasonable on 32-bit, cap at 768MB on all machines.
1722 */
1723 if (!rmo_top)
1724 rmo_top = ram_top;
1725 rmo_top = min(0x30000000ul, rmo_top);
1726 alloc_top = rmo_top;
1727 alloc_top_high = ram_top;
1728
1729 /*
1730 * Check if we have an initrd after the kernel but still inside
1731 * the RMO. If we do move our bottom point to after it.
1732 */
1733 if (prom_initrd_start &&
1734 prom_initrd_start < rmo_top &&
1735 prom_initrd_end > alloc_bottom)
1736 alloc_bottom = PAGE_ALIGN(prom_initrd_end);
1737
1738 prom_printf("memory layout at init:\n");
1739 prom_printf(" memory_limit : %lx (16 MB aligned)\n",
1740 prom_memory_limit);
1741 prom_printf(" alloc_bottom : %lx\n", alloc_bottom);
1742 prom_printf(" alloc_top : %lx\n", alloc_top);
1743 prom_printf(" alloc_top_hi : %lx\n", alloc_top_high);
1744 prom_printf(" rmo_top : %lx\n", rmo_top);
1745 prom_printf(" ram_top : %lx\n", ram_top);
1746}
1747
1748static void __init prom_close_stdin(void)
1749{
1750 __be32 val;
1751 ihandle stdin;
1752
1753 if (prom_getprop(prom.chosen, "stdin", &val, sizeof(val)) > 0) {
1754 stdin = be32_to_cpu(val);
1755 call_prom("close", 1, 0, stdin);
1756 }
1757}
1758
1759#ifdef CONFIG_PPC_SVM
1760static int prom_rtas_hcall(uint64_t args)
1761{
1762 register uint64_t arg1 asm("r3") = H_RTAS;
1763 register uint64_t arg2 asm("r4") = args;
1764
1765 asm volatile("sc 1\n" : "=r" (arg1) :
1766 "r" (arg1),
1767 "r" (arg2) :);
1768 return arg1;
1769}
1770
1771static struct rtas_args __prombss os_term_args;
1772
1773static void __init prom_rtas_os_term(char *str)
1774{
1775 phandle rtas_node;
1776 __be32 val;
1777 u32 token;
1778
1779 prom_debug("%s: start...\n", __func__);
1780 rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
1781 prom_debug("rtas_node: %x\n", rtas_node);
1782 if (!PHANDLE_VALID(rtas_node))
1783 return;
1784
1785 val = 0;
1786 prom_getprop(rtas_node, "ibm,os-term", &val, sizeof(val));
1787 token = be32_to_cpu(val);
1788 prom_debug("ibm,os-term: %x\n", token);
1789 if (token == 0)
1790 prom_panic("Could not get token for ibm,os-term\n");
1791 os_term_args.token = cpu_to_be32(token);
1792 os_term_args.nargs = cpu_to_be32(1);
1793 os_term_args.nret = cpu_to_be32(1);
1794 os_term_args.args[0] = cpu_to_be32(__pa(str));
1795 prom_rtas_hcall((uint64_t)&os_term_args);
1796}
1797#endif /* CONFIG_PPC_SVM */
1798
1799/*
1800 * Allocate room for and instantiate RTAS
1801 */
1802static void __init prom_instantiate_rtas(void)
1803{
1804 phandle rtas_node;
1805 ihandle rtas_inst;
1806 u32 base, entry = 0;
1807 __be32 val;
1808 u32 size = 0;
1809
1810 prom_debug("prom_instantiate_rtas: start...\n");
1811
1812 rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
1813 prom_debug("rtas_node: %x\n", rtas_node);
1814 if (!PHANDLE_VALID(rtas_node))
1815 return;
1816
1817 val = 0;
1818 prom_getprop(rtas_node, "rtas-size", &val, sizeof(size));
1819 size = be32_to_cpu(val);
1820 if (size == 0)
1821 return;
1822
1823 base = alloc_down(size, PAGE_SIZE, 0);
1824 if (base == 0)
1825 prom_panic("Could not allocate memory for RTAS\n");
1826
1827 rtas_inst = call_prom("open", 1, 1, ADDR("/rtas"));
1828 if (!IHANDLE_VALID(rtas_inst)) {
1829 prom_printf("opening rtas package failed (%x)\n", rtas_inst);
1830 return;
1831 }
1832
1833 prom_printf("instantiating rtas at 0x%x...", base);
1834
1835 if (call_prom_ret("call-method", 3, 2, &entry,
1836 ADDR("instantiate-rtas"),
1837 rtas_inst, base) != 0
1838 || entry == 0) {
1839 prom_printf(" failed\n");
1840 return;
1841 }
1842 prom_printf(" done\n");
1843
1844 reserve_mem(base, size);
1845
1846 val = cpu_to_be32(base);
1847 prom_setprop(rtas_node, "/rtas", "linux,rtas-base",
1848 &val, sizeof(val));
1849 val = cpu_to_be32(entry);
1850 prom_setprop(rtas_node, "/rtas", "linux,rtas-entry",
1851 &val, sizeof(val));
1852
1853 /* Check if it supports "query-cpu-stopped-state" */
1854 if (prom_getprop(rtas_node, "query-cpu-stopped-state",
1855 &val, sizeof(val)) != PROM_ERROR)
1856 rtas_has_query_cpu_stopped = true;
1857
1858 prom_debug("rtas base = 0x%x\n", base);
1859 prom_debug("rtas entry = 0x%x\n", entry);
1860 prom_debug("rtas size = 0x%x\n", size);
1861
1862 prom_debug("prom_instantiate_rtas: end...\n");
1863}
1864
1865#ifdef CONFIG_PPC64
1866/*
1867 * Allocate room for and instantiate Stored Measurement Log (SML)
1868 */
1869static void __init prom_instantiate_sml(void)
1870{
1871 phandle ibmvtpm_node;
1872 ihandle ibmvtpm_inst;
1873 u32 entry = 0, size = 0, succ = 0;
1874 u64 base;
1875 __be32 val;
1876
1877 prom_debug("prom_instantiate_sml: start...\n");
1878
1879 ibmvtpm_node = call_prom("finddevice", 1, 1, ADDR("/vdevice/vtpm"));
1880 prom_debug("ibmvtpm_node: %x\n", ibmvtpm_node);
1881 if (!PHANDLE_VALID(ibmvtpm_node))
1882 return;
1883
1884 ibmvtpm_inst = call_prom("open", 1, 1, ADDR("/vdevice/vtpm"));
1885 if (!IHANDLE_VALID(ibmvtpm_inst)) {
1886 prom_printf("opening vtpm package failed (%x)\n", ibmvtpm_inst);
1887 return;
1888 }
1889
1890 if (prom_getprop(ibmvtpm_node, "ibm,sml-efi-reformat-supported",
1891 &val, sizeof(val)) != PROM_ERROR) {
1892 if (call_prom_ret("call-method", 2, 2, &succ,
1893 ADDR("reformat-sml-to-efi-alignment"),
1894 ibmvtpm_inst) != 0 || succ == 0) {
1895 prom_printf("Reformat SML to EFI alignment failed\n");
1896 return;
1897 }
1898
1899 if (call_prom_ret("call-method", 2, 2, &size,
1900 ADDR("sml-get-allocated-size"),
1901 ibmvtpm_inst) != 0 || size == 0) {
1902 prom_printf("SML get allocated size failed\n");
1903 return;
1904 }
1905 } else {
1906 if (call_prom_ret("call-method", 2, 2, &size,
1907 ADDR("sml-get-handover-size"),
1908 ibmvtpm_inst) != 0 || size == 0) {
1909 prom_printf("SML get handover size failed\n");
1910 return;
1911 }
1912 }
1913
1914 base = alloc_down(size, PAGE_SIZE, 0);
1915 if (base == 0)
1916 prom_panic("Could not allocate memory for sml\n");
1917
1918 prom_printf("instantiating sml at 0x%llx...", base);
1919
1920 memset((void *)base, 0, size);
1921
1922 if (call_prom_ret("call-method", 4, 2, &entry,
1923 ADDR("sml-handover"),
1924 ibmvtpm_inst, size, base) != 0 || entry == 0) {
1925 prom_printf("SML handover failed\n");
1926 return;
1927 }
1928 prom_printf(" done\n");
1929
1930 reserve_mem(base, size);
1931
1932 prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-base",
1933 &base, sizeof(base));
1934 prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-size",
1935 &size, sizeof(size));
1936
1937 prom_debug("sml base = 0x%llx\n", base);
1938 prom_debug("sml size = 0x%x\n", size);
1939
1940 prom_debug("prom_instantiate_sml: end...\n");
1941}
1942
1943/*
1944 * Allocate room for and initialize TCE tables
1945 */
1946#ifdef __BIG_ENDIAN__
1947static void __init prom_initialize_tce_table(void)
1948{
1949 phandle node;
1950 ihandle phb_node;
1951 char compatible[64], type[64], model[64];
1952 char *path = prom_scratch;
1953 u64 base, align;
1954 u32 minalign, minsize;
1955 u64 tce_entry, *tce_entryp;
1956 u64 local_alloc_top, local_alloc_bottom;
1957 u64 i;
1958
1959 if (prom_iommu_off)
1960 return;
1961
1962 prom_debug("starting prom_initialize_tce_table\n");
1963
1964 /* Cache current top of allocs so we reserve a single block */
1965 local_alloc_top = alloc_top_high;
1966 local_alloc_bottom = local_alloc_top;
1967
1968 /* Search all nodes looking for PHBs. */
1969 for (node = 0; prom_next_node(&node); ) {
1970 compatible[0] = 0;
1971 type[0] = 0;
1972 model[0] = 0;
1973 prom_getprop(node, "compatible",
1974 compatible, sizeof(compatible));
1975 prom_getprop(node, "device_type", type, sizeof(type));
1976 prom_getprop(node, "model", model, sizeof(model));
1977
1978 if ((type[0] == 0) || (prom_strstr(type, "pci") == NULL))
1979 continue;
1980
1981 /* Keep the old logic intact to avoid regression. */
1982 if (compatible[0] != 0) {
1983 if ((prom_strstr(compatible, "python") == NULL) &&
1984 (prom_strstr(compatible, "Speedwagon") == NULL) &&
1985 (prom_strstr(compatible, "Winnipeg") == NULL))
1986 continue;
1987 } else if (model[0] != 0) {
1988 if ((prom_strstr(model, "ython") == NULL) &&
1989 (prom_strstr(model, "peedwagon") == NULL) &&
1990 (prom_strstr(model, "innipeg") == NULL))
1991 continue;
1992 }
1993
1994 if (prom_getprop(node, "tce-table-minalign", &minalign,
1995 sizeof(minalign)) == PROM_ERROR)
1996 minalign = 0;
1997 if (prom_getprop(node, "tce-table-minsize", &minsize,
1998 sizeof(minsize)) == PROM_ERROR)
1999 minsize = 4UL << 20;
2000
2001 /*
2002 * Even though we read what OF wants, we just set the table
2003 * size to 4 MB. This is enough to map 2GB of PCI DMA space.
2004 * By doing this, we avoid the pitfalls of trying to DMA to
2005 * MMIO space and the DMA alias hole.
2006 */
2007 minsize = 4UL << 20;
2008
2009 /* Align to the greater of the align or size */
2010 align = max(minalign, minsize);
2011 base = alloc_down(minsize, align, 1);
2012 if (base == 0)
2013 prom_panic("ERROR, cannot find space for TCE table.\n");
2014 if (base < local_alloc_bottom)
2015 local_alloc_bottom = base;
2016
2017 /* It seems OF doesn't null-terminate the path :-( */
2018 memset(path, 0, sizeof(prom_scratch));
2019 /* Call OF to setup the TCE hardware */
2020 if (call_prom("package-to-path", 3, 1, node,
2021 path, sizeof(prom_scratch) - 1) == PROM_ERROR) {
2022 prom_printf("package-to-path failed\n");
2023 }
2024
2025 /* Save away the TCE table attributes for later use. */
2026 prom_setprop(node, path, "linux,tce-base", &base, sizeof(base));
2027 prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize));
2028
2029 prom_debug("TCE table: %s\n", path);
2030 prom_debug("\tnode = 0x%x\n", node);
2031 prom_debug("\tbase = 0x%llx\n", base);
2032 prom_debug("\tsize = 0x%x\n", minsize);
2033
2034 /* Initialize the table to have a one-to-one mapping
2035 * over the allocated size.
2036 */
2037 tce_entryp = (u64 *)base;
2038 for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) {
2039 tce_entry = (i << PAGE_SHIFT);
2040 tce_entry |= 0x3;
2041 *tce_entryp = tce_entry;
2042 }
2043
2044 prom_printf("opening PHB %s", path);
2045 phb_node = call_prom("open", 1, 1, path);
2046 if (phb_node == 0)
2047 prom_printf("... failed\n");
2048 else
2049 prom_printf("... done\n");
2050
2051 call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"),
2052 phb_node, -1, minsize,
2053 (u32) base, (u32) (base >> 32));
2054 call_prom("close", 1, 0, phb_node);
2055 }
2056
2057 reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom);
2058
2059 /* These are only really needed if there is a memory limit in
2060 * effect, but we don't know so export them always. */
2061 prom_tce_alloc_start = local_alloc_bottom;
2062 prom_tce_alloc_end = local_alloc_top;
2063
2064 /* Flag the first invalid entry */
2065 prom_debug("ending prom_initialize_tce_table\n");
2066}
2067#endif /* __BIG_ENDIAN__ */
2068#endif /* CONFIG_PPC64 */
2069
2070/*
2071 * With CHRP SMP we need to use the OF to start the other processors.
2072 * We can't wait until smp_boot_cpus (the OF is trashed by then)
2073 * so we have to put the processors into a holding pattern controlled
2074 * by the kernel (not OF) before we destroy the OF.
2075 *
2076 * This uses a chunk of low memory, puts some holding pattern
2077 * code there and sends the other processors off to there until
2078 * smp_boot_cpus tells them to do something. The holding pattern
2079 * checks that address until its cpu # is there, when it is that
2080 * cpu jumps to __secondary_start(). smp_boot_cpus() takes care
2081 * of setting those values.
2082 *
2083 * We also use physical address 0x4 here to tell when a cpu
2084 * is in its holding pattern code.
2085 *
2086 * -- Cort
2087 */
2088/*
2089 * We want to reference the copy of __secondary_hold_* in the
2090 * 0 - 0x100 address range
2091 */
2092#define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff)
2093
2094static void __init prom_hold_cpus(void)
2095{
2096 unsigned long i;
2097 phandle node;
2098 char type[64];
2099 unsigned long *spinloop
2100 = (void *) LOW_ADDR(__secondary_hold_spinloop);
2101 unsigned long *acknowledge
2102 = (void *) LOW_ADDR(__secondary_hold_acknowledge);
2103 unsigned long secondary_hold = LOW_ADDR(__secondary_hold);
2104
2105 /*
2106 * On pseries, if RTAS supports "query-cpu-stopped-state",
2107 * we skip this stage, the CPUs will be started by the
2108 * kernel using RTAS.
2109 */
2110 if ((of_platform == PLATFORM_PSERIES ||
2111 of_platform == PLATFORM_PSERIES_LPAR) &&
2112 rtas_has_query_cpu_stopped) {
2113 prom_printf("prom_hold_cpus: skipped\n");
2114 return;
2115 }
2116
2117 prom_debug("prom_hold_cpus: start...\n");
2118 prom_debug(" 1) spinloop = 0x%lx\n", (unsigned long)spinloop);
2119 prom_debug(" 1) *spinloop = 0x%lx\n", *spinloop);
2120 prom_debug(" 1) acknowledge = 0x%lx\n",
2121 (unsigned long)acknowledge);
2122 prom_debug(" 1) *acknowledge = 0x%lx\n", *acknowledge);
2123 prom_debug(" 1) secondary_hold = 0x%lx\n", secondary_hold);
2124
2125 /* Set the common spinloop variable, so all of the secondary cpus
2126 * will block when they are awakened from their OF spinloop.
2127 * This must occur for both SMP and non SMP kernels, since OF will
2128 * be trashed when we move the kernel.
2129 */
2130 *spinloop = 0;
2131
2132 /* look for cpus */
2133 for (node = 0; prom_next_node(&node); ) {
2134 unsigned int cpu_no;
2135 __be32 reg;
2136
2137 type[0] = 0;
2138 prom_getprop(node, "device_type", type, sizeof(type));
2139 if (prom_strcmp(type, "cpu") != 0)
2140 continue;
2141
2142 /* Skip non-configured cpus. */
2143 if (prom_getprop(node, "status", type, sizeof(type)) > 0)
2144 if (prom_strcmp(type, "okay") != 0)
2145 continue;
2146
2147 reg = cpu_to_be32(-1); /* make sparse happy */
2148 prom_getprop(node, "reg", ®, sizeof(reg));
2149 cpu_no = be32_to_cpu(reg);
2150
2151 prom_debug("cpu hw idx = %u\n", cpu_no);
2152
2153 /* Init the acknowledge var which will be reset by
2154 * the secondary cpu when it awakens from its OF
2155 * spinloop.
2156 */
2157 *acknowledge = (unsigned long)-1;
2158
2159 if (cpu_no != prom.cpu) {
2160 /* Primary Thread of non-boot cpu or any thread */
2161 prom_printf("starting cpu hw idx %u... ", cpu_no);
2162 call_prom("start-cpu", 3, 0, node,
2163 secondary_hold, cpu_no);
2164
2165 for (i = 0; (i < 100000000) &&
2166 (*acknowledge == ((unsigned long)-1)); i++ )
2167 mb();
2168
2169 if (*acknowledge == cpu_no)
2170 prom_printf("done\n");
2171 else
2172 prom_printf("failed: %lx\n", *acknowledge);
2173 }
2174#ifdef CONFIG_SMP
2175 else
2176 prom_printf("boot cpu hw idx %u\n", cpu_no);
2177#endif /* CONFIG_SMP */
2178 }
2179
2180 prom_debug("prom_hold_cpus: end...\n");
2181}
2182
2183
2184static void __init prom_init_client_services(unsigned long pp)
2185{
2186 /* Get a handle to the prom entry point before anything else */
2187 prom_entry = pp;
2188
2189 /* get a handle for the stdout device */
2190 prom.chosen = call_prom("finddevice", 1, 1, ADDR("/chosen"));
2191 if (!PHANDLE_VALID(prom.chosen))
2192 prom_panic("cannot find chosen"); /* msg won't be printed :( */
2193
2194 /* get device tree root */
2195 prom.root = call_prom("finddevice", 1, 1, ADDR("/"));
2196 if (!PHANDLE_VALID(prom.root))
2197 prom_panic("cannot find device tree root"); /* msg won't be printed :( */
2198
2199 prom.mmumap = 0;
2200}
2201
2202#ifdef CONFIG_PPC32
2203/*
2204 * For really old powermacs, we need to map things we claim.
2205 * For that, we need the ihandle of the mmu.
2206 * Also, on the longtrail, we need to work around other bugs.
2207 */
2208static void __init prom_find_mmu(void)
2209{
2210 phandle oprom;
2211 char version[64];
2212
2213 oprom = call_prom("finddevice", 1, 1, ADDR("/openprom"));
2214 if (!PHANDLE_VALID(oprom))
2215 return;
2216 if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0)
2217 return;
2218 version[sizeof(version) - 1] = 0;
2219 /* XXX might need to add other versions here */
2220 if (prom_strcmp(version, "Open Firmware, 1.0.5") == 0)
2221 of_workarounds = OF_WA_CLAIM;
2222 else if (prom_strncmp(version, "FirmWorks,3.", 12) == 0) {
2223 of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL;
2224 call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim");
2225 } else
2226 return;
2227 prom.memory = call_prom("open", 1, 1, ADDR("/memory"));
2228 prom_getprop(prom.chosen, "mmu", &prom.mmumap,
2229 sizeof(prom.mmumap));
2230 prom.mmumap = be32_to_cpu(prom.mmumap);
2231 if (!IHANDLE_VALID(prom.memory) || !IHANDLE_VALID(prom.mmumap))
2232 of_workarounds &= ~OF_WA_CLAIM; /* hmmm */
2233}
2234#else
2235#define prom_find_mmu()
2236#endif
2237
2238static void __init prom_init_stdout(void)
2239{
2240 char *path = of_stdout_device;
2241 char type[16];
2242 phandle stdout_node;
2243 __be32 val;
2244
2245 if (prom_getprop(prom.chosen, "stdout", &val, sizeof(val)) <= 0)
2246 prom_panic("cannot find stdout");
2247
2248 prom.stdout = be32_to_cpu(val);
2249
2250 /* Get the full OF pathname of the stdout device */
2251 memset(path, 0, 256);
2252 call_prom("instance-to-path", 3, 1, prom.stdout, path, 255);
2253 prom_printf("OF stdout device is: %s\n", of_stdout_device);
2254 prom_setprop(prom.chosen, "/chosen", "linux,stdout-path",
2255 path, prom_strlen(path) + 1);
2256
2257 /* instance-to-package fails on PA-Semi */
2258 stdout_node = call_prom("instance-to-package", 1, 1, prom.stdout);
2259 if (stdout_node != PROM_ERROR) {
2260 val = cpu_to_be32(stdout_node);
2261
2262 /* If it's a display, note it */
2263 memset(type, 0, sizeof(type));
2264 prom_getprop(stdout_node, "device_type", type, sizeof(type));
2265 if (prom_strcmp(type, "display") == 0)
2266 prom_setprop(stdout_node, path, "linux,boot-display", NULL, 0);
2267 }
2268}
2269
2270static int __init prom_find_machine_type(void)
2271{
2272 char compat[256];
2273 int len, i = 0;
2274#ifdef CONFIG_PPC64
2275 phandle rtas;
2276 int x;
2277#endif
2278
2279 /* Look for a PowerMac or a Cell */
2280 len = prom_getprop(prom.root, "compatible",
2281 compat, sizeof(compat)-1);
2282 if (len > 0) {
2283 compat[len] = 0;
2284 while (i < len) {
2285 char *p = &compat[i];
2286 int sl = prom_strlen(p);
2287 if (sl == 0)
2288 break;
2289 if (prom_strstr(p, "Power Macintosh") ||
2290 prom_strstr(p, "MacRISC"))
2291 return PLATFORM_POWERMAC;
2292#ifdef CONFIG_PPC64
2293 /* We must make sure we don't detect the IBM Cell
2294 * blades as pSeries due to some firmware issues,
2295 * so we do it here.
2296 */
2297 if (prom_strstr(p, "IBM,CBEA") ||
2298 prom_strstr(p, "IBM,CPBW-1.0"))
2299 return PLATFORM_GENERIC;
2300#endif /* CONFIG_PPC64 */
2301 i += sl + 1;
2302 }
2303 }
2304#ifdef CONFIG_PPC64
2305 /* Try to figure out if it's an IBM pSeries or any other
2306 * PAPR compliant platform. We assume it is if :
2307 * - /device_type is "chrp" (please, do NOT use that for future
2308 * non-IBM designs !
2309 * - it has /rtas
2310 */
2311 len = prom_getprop(prom.root, "device_type",
2312 compat, sizeof(compat)-1);
2313 if (len <= 0)
2314 return PLATFORM_GENERIC;
2315 if (prom_strcmp(compat, "chrp"))
2316 return PLATFORM_GENERIC;
2317
2318 /* Default to pSeries. We need to know if we are running LPAR */
2319 rtas = call_prom("finddevice", 1, 1, ADDR("/rtas"));
2320 if (!PHANDLE_VALID(rtas))
2321 return PLATFORM_GENERIC;
2322 x = prom_getproplen(rtas, "ibm,hypertas-functions");
2323 if (x != PROM_ERROR) {
2324 prom_debug("Hypertas detected, assuming LPAR !\n");
2325 return PLATFORM_PSERIES_LPAR;
2326 }
2327 return PLATFORM_PSERIES;
2328#else
2329 return PLATFORM_GENERIC;
2330#endif
2331}
2332
2333static int __init prom_set_color(ihandle ih, int i, int r, int g, int b)
2334{
2335 return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r);
2336}
2337
2338/*
2339 * If we have a display that we don't know how to drive,
2340 * we will want to try to execute OF's open method for it
2341 * later. However, OF will probably fall over if we do that
2342 * we've taken over the MMU.
2343 * So we check whether we will need to open the display,
2344 * and if so, open it now.
2345 */
2346static void __init prom_check_displays(void)
2347{
2348 char type[16], *path;
2349 phandle node;
2350 ihandle ih;
2351 int i;
2352
2353 static const unsigned char default_colors[] __initconst = {
2354 0x00, 0x00, 0x00,
2355 0x00, 0x00, 0xaa,
2356 0x00, 0xaa, 0x00,
2357 0x00, 0xaa, 0xaa,
2358 0xaa, 0x00, 0x00,
2359 0xaa, 0x00, 0xaa,
2360 0xaa, 0xaa, 0x00,
2361 0xaa, 0xaa, 0xaa,
2362 0x55, 0x55, 0x55,
2363 0x55, 0x55, 0xff,
2364 0x55, 0xff, 0x55,
2365 0x55, 0xff, 0xff,
2366 0xff, 0x55, 0x55,
2367 0xff, 0x55, 0xff,
2368 0xff, 0xff, 0x55,
2369 0xff, 0xff, 0xff
2370 };
2371 const unsigned char *clut;
2372
2373 prom_debug("Looking for displays\n");
2374 for (node = 0; prom_next_node(&node); ) {
2375 memset(type, 0, sizeof(type));
2376 prom_getprop(node, "device_type", type, sizeof(type));
2377 if (prom_strcmp(type, "display") != 0)
2378 continue;
2379
2380 /* It seems OF doesn't null-terminate the path :-( */
2381 path = prom_scratch;
2382 memset(path, 0, sizeof(prom_scratch));
2383
2384 /*
2385 * leave some room at the end of the path for appending extra
2386 * arguments
2387 */
2388 if (call_prom("package-to-path", 3, 1, node, path,
2389 sizeof(prom_scratch) - 10) == PROM_ERROR)
2390 continue;
2391 prom_printf("found display : %s, opening... ", path);
2392
2393 ih = call_prom("open", 1, 1, path);
2394 if (ih == 0) {
2395 prom_printf("failed\n");
2396 continue;
2397 }
2398
2399 /* Success */
2400 prom_printf("done\n");
2401 prom_setprop(node, path, "linux,opened", NULL, 0);
2402
2403 /* Setup a usable color table when the appropriate
2404 * method is available. Should update this to set-colors */
2405 clut = default_colors;
2406 for (i = 0; i < 16; i++, clut += 3)
2407 if (prom_set_color(ih, i, clut[0], clut[1],
2408 clut[2]) != 0)
2409 break;
2410
2411#ifdef CONFIG_LOGO_LINUX_CLUT224
2412 clut = PTRRELOC(logo_linux_clut224.clut);
2413 for (i = 0; i < logo_linux_clut224.clutsize; i++, clut += 3)
2414 if (prom_set_color(ih, i + 32, clut[0], clut[1],
2415 clut[2]) != 0)
2416 break;
2417#endif /* CONFIG_LOGO_LINUX_CLUT224 */
2418
2419#ifdef CONFIG_PPC_EARLY_DEBUG_BOOTX
2420 if (prom_getprop(node, "linux,boot-display", NULL, 0) !=
2421 PROM_ERROR) {
2422 u32 width, height, pitch, addr;
2423
2424 prom_printf("Setting btext !\n");
2425 prom_getprop(node, "width", &width, 4);
2426 prom_getprop(node, "height", &height, 4);
2427 prom_getprop(node, "linebytes", &pitch, 4);
2428 prom_getprop(node, "address", &addr, 4);
2429 prom_printf("W=%d H=%d LB=%d addr=0x%x\n",
2430 width, height, pitch, addr);
2431 btext_setup_display(width, height, 8, pitch, addr);
2432 btext_prepare_BAT();
2433 }
2434#endif /* CONFIG_PPC_EARLY_DEBUG_BOOTX */
2435 }
2436}
2437
2438
2439/* Return (relocated) pointer to this much memory: moves initrd if reqd. */
2440static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end,
2441 unsigned long needed, unsigned long align)
2442{
2443 void *ret;
2444
2445 *mem_start = ALIGN(*mem_start, align);
2446 while ((*mem_start + needed) > *mem_end) {
2447 unsigned long room, chunk;
2448
2449 prom_debug("Chunk exhausted, claiming more at %lx...\n",
2450 alloc_bottom);
2451 room = alloc_top - alloc_bottom;
2452 if (room > DEVTREE_CHUNK_SIZE)
2453 room = DEVTREE_CHUNK_SIZE;
2454 if (room < PAGE_SIZE)
2455 prom_panic("No memory for flatten_device_tree "
2456 "(no room)\n");
2457 chunk = alloc_up(room, 0);
2458 if (chunk == 0)
2459 prom_panic("No memory for flatten_device_tree "
2460 "(claim failed)\n");
2461 *mem_end = chunk + room;
2462 }
2463
2464 ret = (void *)*mem_start;
2465 *mem_start += needed;
2466
2467 return ret;
2468}
2469
2470#define dt_push_token(token, mem_start, mem_end) do { \
2471 void *room = make_room(mem_start, mem_end, 4, 4); \
2472 *(__be32 *)room = cpu_to_be32(token); \
2473 } while(0)
2474
2475static unsigned long __init dt_find_string(char *str)
2476{
2477 char *s, *os;
2478
2479 s = os = (char *)dt_string_start;
2480 s += 4;
2481 while (s < (char *)dt_string_end) {
2482 if (prom_strcmp(s, str) == 0)
2483 return s - os;
2484 s += prom_strlen(s) + 1;
2485 }
2486 return 0;
2487}
2488
2489/*
2490 * The Open Firmware 1275 specification states properties must be 31 bytes or
2491 * less, however not all firmwares obey this. Make it 64 bytes to be safe.
2492 */
2493#define MAX_PROPERTY_NAME 64
2494
2495static void __init scan_dt_build_strings(phandle node,
2496 unsigned long *mem_start,
2497 unsigned long *mem_end)
2498{
2499 char *prev_name, *namep, *sstart;
2500 unsigned long soff;
2501 phandle child;
2502
2503 sstart = (char *)dt_string_start;
2504
2505 /* get and store all property names */
2506 prev_name = "";
2507 for (;;) {
2508 /* 64 is max len of name including nul. */
2509 namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1);
2510 if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) {
2511 /* No more nodes: unwind alloc */
2512 *mem_start = (unsigned long)namep;
2513 break;
2514 }
2515
2516 /* skip "name" */
2517 if (prom_strcmp(namep, "name") == 0) {
2518 *mem_start = (unsigned long)namep;
2519 prev_name = "name";
2520 continue;
2521 }
2522 /* get/create string entry */
2523 soff = dt_find_string(namep);
2524 if (soff != 0) {
2525 *mem_start = (unsigned long)namep;
2526 namep = sstart + soff;
2527 } else {
2528 /* Trim off some if we can */
2529 *mem_start = (unsigned long)namep + prom_strlen(namep) + 1;
2530 dt_string_end = *mem_start;
2531 }
2532 prev_name = namep;
2533 }
2534
2535 /* do all our children */
2536 child = call_prom("child", 1, 1, node);
2537 while (child != 0) {
2538 scan_dt_build_strings(child, mem_start, mem_end);
2539 child = call_prom("peer", 1, 1, child);
2540 }
2541}
2542
2543static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
2544 unsigned long *mem_end)
2545{
2546 phandle child;
2547 char *namep, *prev_name, *sstart, *p, *ep, *lp, *path;
2548 unsigned long soff;
2549 unsigned char *valp;
2550 static char pname[MAX_PROPERTY_NAME] __prombss;
2551 int l, room, has_phandle = 0;
2552
2553 dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end);
2554
2555 /* get the node's full name */
2556 namep = (char *)*mem_start;
2557 room = *mem_end - *mem_start;
2558 if (room > 255)
2559 room = 255;
2560 l = call_prom("package-to-path", 3, 1, node, namep, room);
2561 if (l >= 0) {
2562 /* Didn't fit? Get more room. */
2563 if (l >= room) {
2564 if (l >= *mem_end - *mem_start)
2565 namep = make_room(mem_start, mem_end, l+1, 1);
2566 call_prom("package-to-path", 3, 1, node, namep, l);
2567 }
2568 namep[l] = '\0';
2569
2570 /* Fixup an Apple bug where they have bogus \0 chars in the
2571 * middle of the path in some properties, and extract
2572 * the unit name (everything after the last '/').
2573 */
2574 for (lp = p = namep, ep = namep + l; p < ep; p++) {
2575 if (*p == '/')
2576 lp = namep;
2577 else if (*p != 0)
2578 *lp++ = *p;
2579 }
2580 *lp = 0;
2581 *mem_start = ALIGN((unsigned long)lp + 1, 4);
2582 }
2583
2584 /* get it again for debugging */
2585 path = prom_scratch;
2586 memset(path, 0, sizeof(prom_scratch));
2587 call_prom("package-to-path", 3, 1, node, path, sizeof(prom_scratch) - 1);
2588
2589 /* get and store all properties */
2590 prev_name = "";
2591 sstart = (char *)dt_string_start;
2592 for (;;) {
2593 if (call_prom("nextprop", 3, 1, node, prev_name,
2594 pname) != 1)
2595 break;
2596
2597 /* skip "name" */
2598 if (prom_strcmp(pname, "name") == 0) {
2599 prev_name = "name";
2600 continue;
2601 }
2602
2603 /* find string offset */
2604 soff = dt_find_string(pname);
2605 if (soff == 0) {
2606 prom_printf("WARNING: Can't find string index for"
2607 " <%s>, node %s\n", pname, path);
2608 break;
2609 }
2610 prev_name = sstart + soff;
2611
2612 /* get length */
2613 l = call_prom("getproplen", 2, 1, node, pname);
2614
2615 /* sanity checks */
2616 if (l == PROM_ERROR)
2617 continue;
2618
2619 /* push property head */
2620 dt_push_token(OF_DT_PROP, mem_start, mem_end);
2621 dt_push_token(l, mem_start, mem_end);
2622 dt_push_token(soff, mem_start, mem_end);
2623
2624 /* push property content */
2625 valp = make_room(mem_start, mem_end, l, 4);
2626 call_prom("getprop", 4, 1, node, pname, valp, l);
2627 *mem_start = ALIGN(*mem_start, 4);
2628
2629 if (!prom_strcmp(pname, "phandle"))
2630 has_phandle = 1;
2631 }
2632
2633 /* Add a "phandle" property if none already exist */
2634 if (!has_phandle) {
2635 soff = dt_find_string("phandle");
2636 if (soff == 0)
2637 prom_printf("WARNING: Can't find string index for <phandle> node %s\n", path);
2638 else {
2639 dt_push_token(OF_DT_PROP, mem_start, mem_end);
2640 dt_push_token(4, mem_start, mem_end);
2641 dt_push_token(soff, mem_start, mem_end);
2642 valp = make_room(mem_start, mem_end, 4, 4);
2643 *(__be32 *)valp = cpu_to_be32(node);
2644 }
2645 }
2646
2647 /* do all our children */
2648 child = call_prom("child", 1, 1, node);
2649 while (child != 0) {
2650 scan_dt_build_struct(child, mem_start, mem_end);
2651 child = call_prom("peer", 1, 1, child);
2652 }
2653
2654 dt_push_token(OF_DT_END_NODE, mem_start, mem_end);
2655}
2656
2657static void __init flatten_device_tree(void)
2658{
2659 phandle root;
2660 unsigned long mem_start, mem_end, room;
2661 struct boot_param_header *hdr;
2662 char *namep;
2663 u64 *rsvmap;
2664
2665 /*
2666 * Check how much room we have between alloc top & bottom (+/- a
2667 * few pages), crop to 1MB, as this is our "chunk" size
2668 */
2669 room = alloc_top - alloc_bottom - 0x4000;
2670 if (room > DEVTREE_CHUNK_SIZE)
2671 room = DEVTREE_CHUNK_SIZE;
2672 prom_debug("starting device tree allocs at %lx\n", alloc_bottom);
2673
2674 /* Now try to claim that */
2675 mem_start = (unsigned long)alloc_up(room, PAGE_SIZE);
2676 if (mem_start == 0)
2677 prom_panic("Can't allocate initial device-tree chunk\n");
2678 mem_end = mem_start + room;
2679
2680 /* Get root of tree */
2681 root = call_prom("peer", 1, 1, (phandle)0);
2682 if (root == (phandle)0)
2683 prom_panic ("couldn't get device tree root\n");
2684
2685 /* Build header and make room for mem rsv map */
2686 mem_start = ALIGN(mem_start, 4);
2687 hdr = make_room(&mem_start, &mem_end,
2688 sizeof(struct boot_param_header), 4);
2689 dt_header_start = (unsigned long)hdr;
2690 rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8);
2691
2692 /* Start of strings */
2693 mem_start = PAGE_ALIGN(mem_start);
2694 dt_string_start = mem_start;
2695 mem_start += 4; /* hole */
2696
2697 /* Add "phandle" in there, we'll need it */
2698 namep = make_room(&mem_start, &mem_end, 16, 1);
2699 prom_strcpy(namep, "phandle");
2700 mem_start = (unsigned long)namep + prom_strlen(namep) + 1;
2701
2702 /* Build string array */
2703 prom_printf("Building dt strings...\n");
2704 scan_dt_build_strings(root, &mem_start, &mem_end);
2705 dt_string_end = mem_start;
2706
2707 /* Build structure */
2708 mem_start = PAGE_ALIGN(mem_start);
2709 dt_struct_start = mem_start;
2710 prom_printf("Building dt structure...\n");
2711 scan_dt_build_struct(root, &mem_start, &mem_end);
2712 dt_push_token(OF_DT_END, &mem_start, &mem_end);
2713 dt_struct_end = PAGE_ALIGN(mem_start);
2714
2715 /* Finish header */
2716 hdr->boot_cpuid_phys = cpu_to_be32(prom.cpu);
2717 hdr->magic = cpu_to_be32(OF_DT_HEADER);
2718 hdr->totalsize = cpu_to_be32(dt_struct_end - dt_header_start);
2719 hdr->off_dt_struct = cpu_to_be32(dt_struct_start - dt_header_start);
2720 hdr->off_dt_strings = cpu_to_be32(dt_string_start - dt_header_start);
2721 hdr->dt_strings_size = cpu_to_be32(dt_string_end - dt_string_start);
2722 hdr->off_mem_rsvmap = cpu_to_be32(((unsigned long)rsvmap) - dt_header_start);
2723 hdr->version = cpu_to_be32(OF_DT_VERSION);
2724 /* Version 16 is not backward compatible */
2725 hdr->last_comp_version = cpu_to_be32(0x10);
2726
2727 /* Copy the reserve map in */
2728 memcpy(rsvmap, mem_reserve_map, sizeof(mem_reserve_map));
2729
2730#ifdef DEBUG_PROM
2731 {
2732 int i;
2733 prom_printf("reserved memory map:\n");
2734 for (i = 0; i < mem_reserve_cnt; i++)
2735 prom_printf(" %llx - %llx\n",
2736 be64_to_cpu(mem_reserve_map[i].base),
2737 be64_to_cpu(mem_reserve_map[i].size));
2738 }
2739#endif
2740 /* Bump mem_reserve_cnt to cause further reservations to fail
2741 * since it's too late.
2742 */
2743 mem_reserve_cnt = MEM_RESERVE_MAP_SIZE;
2744
2745 prom_printf("Device tree strings 0x%lx -> 0x%lx\n",
2746 dt_string_start, dt_string_end);
2747 prom_printf("Device tree struct 0x%lx -> 0x%lx\n",
2748 dt_struct_start, dt_struct_end);
2749}
2750
2751#ifdef CONFIG_PPC_MAPLE
2752/* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property.
2753 * The values are bad, and it doesn't even have the right number of cells. */
2754static void __init fixup_device_tree_maple(void)
2755{
2756 phandle isa;
2757 u32 rloc = 0x01002000; /* IO space; PCI device = 4 */
2758 u32 isa_ranges[6];
2759 char *name;
2760
2761 name = "/ht@0/isa@4";
2762 isa = call_prom("finddevice", 1, 1, ADDR(name));
2763 if (!PHANDLE_VALID(isa)) {
2764 name = "/ht@0/isa@6";
2765 isa = call_prom("finddevice", 1, 1, ADDR(name));
2766 rloc = 0x01003000; /* IO space; PCI device = 6 */
2767 }
2768 if (!PHANDLE_VALID(isa))
2769 return;
2770
2771 if (prom_getproplen(isa, "ranges") != 12)
2772 return;
2773 if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges))
2774 == PROM_ERROR)
2775 return;
2776
2777 if (isa_ranges[0] != 0x1 ||
2778 isa_ranges[1] != 0xf4000000 ||
2779 isa_ranges[2] != 0x00010000)
2780 return;
2781
2782 prom_printf("Fixing up bogus ISA range on Maple/Apache...\n");
2783
2784 isa_ranges[0] = 0x1;
2785 isa_ranges[1] = 0x0;
2786 isa_ranges[2] = rloc;
2787 isa_ranges[3] = 0x0;
2788 isa_ranges[4] = 0x0;
2789 isa_ranges[5] = 0x00010000;
2790 prom_setprop(isa, name, "ranges",
2791 isa_ranges, sizeof(isa_ranges));
2792}
2793
2794#define CPC925_MC_START 0xf8000000
2795#define CPC925_MC_LENGTH 0x1000000
2796/* The values for memory-controller don't have right number of cells */
2797static void __init fixup_device_tree_maple_memory_controller(void)
2798{
2799 phandle mc;
2800 u32 mc_reg[4];
2801 char *name = "/hostbridge@f8000000";
2802 u32 ac, sc;
2803
2804 mc = call_prom("finddevice", 1, 1, ADDR(name));
2805 if (!PHANDLE_VALID(mc))
2806 return;
2807
2808 if (prom_getproplen(mc, "reg") != 8)
2809 return;
2810
2811 prom_getprop(prom.root, "#address-cells", &ac, sizeof(ac));
2812 prom_getprop(prom.root, "#size-cells", &sc, sizeof(sc));
2813 if ((ac != 2) || (sc != 2))
2814 return;
2815
2816 if (prom_getprop(mc, "reg", mc_reg, sizeof(mc_reg)) == PROM_ERROR)
2817 return;
2818
2819 if (mc_reg[0] != CPC925_MC_START || mc_reg[1] != CPC925_MC_LENGTH)
2820 return;
2821
2822 prom_printf("Fixing up bogus hostbridge on Maple...\n");
2823
2824 mc_reg[0] = 0x0;
2825 mc_reg[1] = CPC925_MC_START;
2826 mc_reg[2] = 0x0;
2827 mc_reg[3] = CPC925_MC_LENGTH;
2828 prom_setprop(mc, name, "reg", mc_reg, sizeof(mc_reg));
2829}
2830#else
2831#define fixup_device_tree_maple()
2832#define fixup_device_tree_maple_memory_controller()
2833#endif
2834
2835#ifdef CONFIG_PPC_CHRP
2836/*
2837 * Pegasos and BriQ lacks the "ranges" property in the isa node
2838 * Pegasos needs decimal IRQ 14/15, not hexadecimal
2839 * Pegasos has the IDE configured in legacy mode, but advertised as native
2840 */
2841static void __init fixup_device_tree_chrp(void)
2842{
2843 phandle ph;
2844 u32 prop[6];
2845 u32 rloc = 0x01006000; /* IO space; PCI device = 12 */
2846 char *name;
2847 int rc;
2848
2849 name = "/pci@80000000/isa@c";
2850 ph = call_prom("finddevice", 1, 1, ADDR(name));
2851 if (!PHANDLE_VALID(ph)) {
2852 name = "/pci@ff500000/isa@6";
2853 ph = call_prom("finddevice", 1, 1, ADDR(name));
2854 rloc = 0x01003000; /* IO space; PCI device = 6 */
2855 }
2856 if (PHANDLE_VALID(ph)) {
2857 rc = prom_getproplen(ph, "ranges");
2858 if (rc == 0 || rc == PROM_ERROR) {
2859 prom_printf("Fixing up missing ISA range on Pegasos...\n");
2860
2861 prop[0] = 0x1;
2862 prop[1] = 0x0;
2863 prop[2] = rloc;
2864 prop[3] = 0x0;
2865 prop[4] = 0x0;
2866 prop[5] = 0x00010000;
2867 prom_setprop(ph, name, "ranges", prop, sizeof(prop));
2868 }
2869 }
2870
2871 name = "/pci@80000000/ide@C,1";
2872 ph = call_prom("finddevice", 1, 1, ADDR(name));
2873 if (PHANDLE_VALID(ph)) {
2874 prom_printf("Fixing up IDE interrupt on Pegasos...\n");
2875 prop[0] = 14;
2876 prop[1] = 0x0;
2877 prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32));
2878 prom_printf("Fixing up IDE class-code on Pegasos...\n");
2879 rc = prom_getprop(ph, "class-code", prop, sizeof(u32));
2880 if (rc == sizeof(u32)) {
2881 prop[0] &= ~0x5;
2882 prom_setprop(ph, name, "class-code", prop, sizeof(u32));
2883 }
2884 }
2885}
2886#else
2887#define fixup_device_tree_chrp()
2888#endif
2889
2890#if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)
2891static void __init fixup_device_tree_pmac(void)
2892{
2893 phandle u3, i2c, mpic;
2894 u32 u3_rev;
2895 u32 interrupts[2];
2896 u32 parent;
2897
2898 /* Some G5s have a missing interrupt definition, fix it up here */
2899 u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000"));
2900 if (!PHANDLE_VALID(u3))
2901 return;
2902 i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000"));
2903 if (!PHANDLE_VALID(i2c))
2904 return;
2905 mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000"));
2906 if (!PHANDLE_VALID(mpic))
2907 return;
2908
2909 /* check if proper rev of u3 */
2910 if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev))
2911 == PROM_ERROR)
2912 return;
2913 if (u3_rev < 0x35 || u3_rev > 0x39)
2914 return;
2915 /* does it need fixup ? */
2916 if (prom_getproplen(i2c, "interrupts") > 0)
2917 return;
2918
2919 prom_printf("fixing up bogus interrupts for u3 i2c...\n");
2920
2921 /* interrupt on this revision of u3 is number 0 and level */
2922 interrupts[0] = 0;
2923 interrupts[1] = 1;
2924 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts",
2925 &interrupts, sizeof(interrupts));
2926 parent = (u32)mpic;
2927 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent",
2928 &parent, sizeof(parent));
2929}
2930#else
2931#define fixup_device_tree_pmac()
2932#endif
2933
2934#ifdef CONFIG_PPC_EFIKA
2935/*
2936 * The MPC5200 FEC driver requires an phy-handle property to tell it how
2937 * to talk to the phy. If the phy-handle property is missing, then this
2938 * function is called to add the appropriate nodes and link it to the
2939 * ethernet node.
2940 */
2941static void __init fixup_device_tree_efika_add_phy(void)
2942{
2943 u32 node;
2944 char prop[64];
2945 int rv;
2946
2947 /* Check if /builtin/ethernet exists - bail if it doesn't */
2948 node = call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet"));
2949 if (!PHANDLE_VALID(node))
2950 return;
2951
2952 /* Check if the phy-handle property exists - bail if it does */
2953 rv = prom_getprop(node, "phy-handle", prop, sizeof(prop));
2954 if (!rv)
2955 return;
2956
2957 /*
2958 * At this point the ethernet device doesn't have a phy described.
2959 * Now we need to add the missing phy node and linkage
2960 */
2961
2962 /* Check for an MDIO bus node - if missing then create one */
2963 node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio"));
2964 if (!PHANDLE_VALID(node)) {
2965 prom_printf("Adding Ethernet MDIO node\n");
2966 call_prom("interpret", 1, 1,
2967 " s\" /builtin\" find-device"
2968 " new-device"
2969 " 1 encode-int s\" #address-cells\" property"
2970 " 0 encode-int s\" #size-cells\" property"
2971 " s\" mdio\" device-name"
2972 " s\" fsl,mpc5200b-mdio\" encode-string"
2973 " s\" compatible\" property"
2974 " 0xf0003000 0x400 reg"
2975 " 0x2 encode-int"
2976 " 0x5 encode-int encode+"
2977 " 0x3 encode-int encode+"
2978 " s\" interrupts\" property"
2979 " finish-device");
2980 };
2981
2982 /* Check for a PHY device node - if missing then create one and
2983 * give it's phandle to the ethernet node */
2984 node = call_prom("finddevice", 1, 1,
2985 ADDR("/builtin/mdio/ethernet-phy"));
2986 if (!PHANDLE_VALID(node)) {
2987 prom_printf("Adding Ethernet PHY node\n");
2988 call_prom("interpret", 1, 1,
2989 " s\" /builtin/mdio\" find-device"
2990 " new-device"
2991 " s\" ethernet-phy\" device-name"
2992 " 0x10 encode-int s\" reg\" property"
2993 " my-self"
2994 " ihandle>phandle"
2995 " finish-device"
2996 " s\" /builtin/ethernet\" find-device"
2997 " encode-int"
2998 " s\" phy-handle\" property"
2999 " device-end");
3000 }
3001}
3002
3003static void __init fixup_device_tree_efika(void)
3004{
3005 int sound_irq[3] = { 2, 2, 0 };
3006 int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0,
3007 3,4,0, 3,5,0, 3,6,0, 3,7,0,
3008 3,8,0, 3,9,0, 3,10,0, 3,11,0,
3009 3,12,0, 3,13,0, 3,14,0, 3,15,0 };
3010 u32 node;
3011 char prop[64];
3012 int rv, len;
3013
3014 /* Check if we're really running on a EFIKA */
3015 node = call_prom("finddevice", 1, 1, ADDR("/"));
3016 if (!PHANDLE_VALID(node))
3017 return;
3018
3019 rv = prom_getprop(node, "model", prop, sizeof(prop));
3020 if (rv == PROM_ERROR)
3021 return;
3022 if (prom_strcmp(prop, "EFIKA5K2"))
3023 return;
3024
3025 prom_printf("Applying EFIKA device tree fixups\n");
3026
3027 /* Claiming to be 'chrp' is death */
3028 node = call_prom("finddevice", 1, 1, ADDR("/"));
3029 rv = prom_getprop(node, "device_type", prop, sizeof(prop));
3030 if (rv != PROM_ERROR && (prom_strcmp(prop, "chrp") == 0))
3031 prom_setprop(node, "/", "device_type", "efika", sizeof("efika"));
3032
3033 /* CODEGEN,description is exposed in /proc/cpuinfo so
3034 fix that too */
3035 rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop));
3036 if (rv != PROM_ERROR && (prom_strstr(prop, "CHRP")))
3037 prom_setprop(node, "/", "CODEGEN,description",
3038 "Efika 5200B PowerPC System",
3039 sizeof("Efika 5200B PowerPC System"));
3040
3041 /* Fixup bestcomm interrupts property */
3042 node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm"));
3043 if (PHANDLE_VALID(node)) {
3044 len = prom_getproplen(node, "interrupts");
3045 if (len == 12) {
3046 prom_printf("Fixing bestcomm interrupts property\n");
3047 prom_setprop(node, "/builtin/bestcom", "interrupts",
3048 bcomm_irq, sizeof(bcomm_irq));
3049 }
3050 }
3051
3052 /* Fixup sound interrupts property */
3053 node = call_prom("finddevice", 1, 1, ADDR("/builtin/sound"));
3054 if (PHANDLE_VALID(node)) {
3055 rv = prom_getprop(node, "interrupts", prop, sizeof(prop));
3056 if (rv == PROM_ERROR) {
3057 prom_printf("Adding sound interrupts property\n");
3058 prom_setprop(node, "/builtin/sound", "interrupts",
3059 sound_irq, sizeof(sound_irq));
3060 }
3061 }
3062
3063 /* Make sure ethernet phy-handle property exists */
3064 fixup_device_tree_efika_add_phy();
3065}
3066#else
3067#define fixup_device_tree_efika()
3068#endif
3069
3070#ifdef CONFIG_PPC_PASEMI_NEMO
3071/*
3072 * CFE supplied on Nemo is broken in several ways, biggest
3073 * problem is that it reassigns ISA interrupts to unused mpic ints.
3074 * Add an interrupt-controller property for the io-bridge to use
3075 * and correct the ints so we can attach them to an irq_domain
3076 */
3077static void __init fixup_device_tree_pasemi(void)
3078{
3079 u32 interrupts[2], parent, rval, val = 0;
3080 char *name, *pci_name;
3081 phandle iob, node;
3082
3083 /* Find the root pci node */
3084 name = "/pxp@0,e0000000";
3085 iob = call_prom("finddevice", 1, 1, ADDR(name));
3086 if (!PHANDLE_VALID(iob))
3087 return;
3088
3089 /* check if interrupt-controller node set yet */
3090 if (prom_getproplen(iob, "interrupt-controller") !=PROM_ERROR)
3091 return;
3092
3093 prom_printf("adding interrupt-controller property for SB600...\n");
3094
3095 prom_setprop(iob, name, "interrupt-controller", &val, 0);
3096
3097 pci_name = "/pxp@0,e0000000/pci@11";
3098 node = call_prom("finddevice", 1, 1, ADDR(pci_name));
3099 parent = ADDR(iob);
3100
3101 for( ; prom_next_node(&node); ) {
3102 /* scan each node for one with an interrupt */
3103 if (!PHANDLE_VALID(node))
3104 continue;
3105
3106 rval = prom_getproplen(node, "interrupts");
3107 if (rval == 0 || rval == PROM_ERROR)
3108 continue;
3109
3110 prom_getprop(node, "interrupts", &interrupts, sizeof(interrupts));
3111 if ((interrupts[0] < 212) || (interrupts[0] > 222))
3112 continue;
3113
3114 /* found a node, update both interrupts and interrupt-parent */
3115 if ((interrupts[0] >= 212) && (interrupts[0] <= 215))
3116 interrupts[0] -= 203;
3117 if ((interrupts[0] >= 216) && (interrupts[0] <= 220))
3118 interrupts[0] -= 213;
3119 if (interrupts[0] == 221)
3120 interrupts[0] = 14;
3121 if (interrupts[0] == 222)
3122 interrupts[0] = 8;
3123
3124 prom_setprop(node, pci_name, "interrupts", interrupts,
3125 sizeof(interrupts));
3126 prom_setprop(node, pci_name, "interrupt-parent", &parent,
3127 sizeof(parent));
3128 }
3129
3130 /*
3131 * The io-bridge has device_type set to 'io-bridge' change it to 'isa'
3132 * so that generic isa-bridge code can add the SB600 and its on-board
3133 * peripherals.
3134 */
3135 name = "/pxp@0,e0000000/io-bridge@0";
3136 iob = call_prom("finddevice", 1, 1, ADDR(name));
3137 if (!PHANDLE_VALID(iob))
3138 return;
3139
3140 /* device_type is already set, just change it. */
3141
3142 prom_printf("Changing device_type of SB600 node...\n");
3143
3144 prom_setprop(iob, name, "device_type", "isa", sizeof("isa"));
3145}
3146#else /* !CONFIG_PPC_PASEMI_NEMO */
3147static inline void fixup_device_tree_pasemi(void) { }
3148#endif
3149
3150static void __init fixup_device_tree(void)
3151{
3152 fixup_device_tree_maple();
3153 fixup_device_tree_maple_memory_controller();
3154 fixup_device_tree_chrp();
3155 fixup_device_tree_pmac();
3156 fixup_device_tree_efika();
3157 fixup_device_tree_pasemi();
3158}
3159
3160static void __init prom_find_boot_cpu(void)
3161{
3162 __be32 rval;
3163 ihandle prom_cpu;
3164 phandle cpu_pkg;
3165
3166 rval = 0;
3167 if (prom_getprop(prom.chosen, "cpu", &rval, sizeof(rval)) <= 0)
3168 return;
3169 prom_cpu = be32_to_cpu(rval);
3170
3171 cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu);
3172
3173 if (!PHANDLE_VALID(cpu_pkg))
3174 return;
3175
3176 prom_getprop(cpu_pkg, "reg", &rval, sizeof(rval));
3177 prom.cpu = be32_to_cpu(rval);
3178
3179 prom_debug("Booting CPU hw index = %d\n", prom.cpu);
3180}
3181
3182static void __init prom_check_initrd(unsigned long r3, unsigned long r4)
3183{
3184#ifdef CONFIG_BLK_DEV_INITRD
3185 if (r3 && r4 && r4 != 0xdeadbeef) {
3186 __be64 val;
3187
3188 prom_initrd_start = is_kernel_addr(r3) ? __pa(r3) : r3;
3189 prom_initrd_end = prom_initrd_start + r4;
3190
3191 val = cpu_to_be64(prom_initrd_start);
3192 prom_setprop(prom.chosen, "/chosen", "linux,initrd-start",
3193 &val, sizeof(val));
3194 val = cpu_to_be64(prom_initrd_end);
3195 prom_setprop(prom.chosen, "/chosen", "linux,initrd-end",
3196 &val, sizeof(val));
3197
3198 reserve_mem(prom_initrd_start,
3199 prom_initrd_end - prom_initrd_start);
3200
3201 prom_debug("initrd_start=0x%lx\n", prom_initrd_start);
3202 prom_debug("initrd_end=0x%lx\n", prom_initrd_end);
3203 }
3204#endif /* CONFIG_BLK_DEV_INITRD */
3205}
3206
3207#ifdef CONFIG_PPC64
3208#ifdef CONFIG_RELOCATABLE
3209static void reloc_toc(void)
3210{
3211}
3212
3213static void unreloc_toc(void)
3214{
3215}
3216#else
3217static void __reloc_toc(unsigned long offset, unsigned long nr_entries)
3218{
3219 unsigned long i;
3220 unsigned long *toc_entry;
3221
3222 /* Get the start of the TOC by using r2 directly. */
3223 asm volatile("addi %0,2,-0x8000" : "=b" (toc_entry));
3224
3225 for (i = 0; i < nr_entries; i++) {
3226 *toc_entry = *toc_entry + offset;
3227 toc_entry++;
3228 }
3229}
3230
3231static void reloc_toc(void)
3232{
3233 unsigned long offset = reloc_offset();
3234 unsigned long nr_entries =
3235 (__prom_init_toc_end - __prom_init_toc_start) / sizeof(long);
3236
3237 __reloc_toc(offset, nr_entries);
3238
3239 mb();
3240}
3241
3242static void unreloc_toc(void)
3243{
3244 unsigned long offset = reloc_offset();
3245 unsigned long nr_entries =
3246 (__prom_init_toc_end - __prom_init_toc_start) / sizeof(long);
3247
3248 mb();
3249
3250 __reloc_toc(-offset, nr_entries);
3251}
3252#endif
3253#endif
3254
3255#ifdef CONFIG_PPC_SVM
3256/*
3257 * Perform the Enter Secure Mode ultracall.
3258 */
3259static int enter_secure_mode(unsigned long kbase, unsigned long fdt)
3260{
3261 register unsigned long r3 asm("r3") = UV_ESM;
3262 register unsigned long r4 asm("r4") = kbase;
3263 register unsigned long r5 asm("r5") = fdt;
3264
3265 asm volatile("sc 2" : "+r"(r3) : "r"(r4), "r"(r5));
3266
3267 return r3;
3268}
3269
3270/*
3271 * Call the Ultravisor to transfer us to secure memory if we have an ESM blob.
3272 */
3273static void __init setup_secure_guest(unsigned long kbase, unsigned long fdt)
3274{
3275 int ret;
3276
3277 if (!prom_svm_enable)
3278 return;
3279
3280 /* Switch to secure mode. */
3281 prom_printf("Switching to secure mode.\n");
3282
3283 /*
3284 * The ultravisor will do an integrity check of the kernel image but we
3285 * relocated it so the check will fail. Restore the original image by
3286 * relocating it back to the kernel virtual base address.
3287 */
3288 if (IS_ENABLED(CONFIG_RELOCATABLE))
3289 relocate(KERNELBASE);
3290
3291 ret = enter_secure_mode(kbase, fdt);
3292
3293 /* Relocate the kernel again. */
3294 if (IS_ENABLED(CONFIG_RELOCATABLE))
3295 relocate(kbase);
3296
3297 if (ret != U_SUCCESS) {
3298 prom_printf("Returned %d from switching to secure mode.\n", ret);
3299 prom_rtas_os_term("Switch to secure mode failed.\n");
3300 }
3301}
3302#else
3303static void __init setup_secure_guest(unsigned long kbase, unsigned long fdt)
3304{
3305}
3306#endif /* CONFIG_PPC_SVM */
3307
3308/*
3309 * We enter here early on, when the Open Firmware prom is still
3310 * handling exceptions and the MMU hash table for us.
3311 */
3312
3313unsigned long __init prom_init(unsigned long r3, unsigned long r4,
3314 unsigned long pp,
3315 unsigned long r6, unsigned long r7,
3316 unsigned long kbase)
3317{
3318 unsigned long hdr;
3319
3320#ifdef CONFIG_PPC32
3321 unsigned long offset = reloc_offset();
3322 reloc_got2(offset);
3323#else
3324 reloc_toc();
3325#endif
3326
3327 /*
3328 * First zero the BSS
3329 */
3330 memset(&__bss_start, 0, __bss_stop - __bss_start);
3331
3332 /*
3333 * Init interface to Open Firmware, get some node references,
3334 * like /chosen
3335 */
3336 prom_init_client_services(pp);
3337
3338 /*
3339 * See if this OF is old enough that we need to do explicit maps
3340 * and other workarounds
3341 */
3342 prom_find_mmu();
3343
3344 /*
3345 * Init prom stdout device
3346 */
3347 prom_init_stdout();
3348
3349 prom_printf("Preparing to boot %s", linux_banner);
3350
3351 /*
3352 * Get default machine type. At this point, we do not differentiate
3353 * between pSeries SMP and pSeries LPAR
3354 */
3355 of_platform = prom_find_machine_type();
3356 prom_printf("Detected machine type: %x\n", of_platform);
3357
3358#ifndef CONFIG_NONSTATIC_KERNEL
3359 /* Bail if this is a kdump kernel. */
3360 if (PHYSICAL_START > 0)
3361 prom_panic("Error: You can't boot a kdump kernel from OF!\n");
3362#endif
3363
3364 /*
3365 * Check for an initrd
3366 */
3367 prom_check_initrd(r3, r4);
3368
3369 /*
3370 * Do early parsing of command line
3371 */
3372 early_cmdline_parse();
3373
3374#ifdef CONFIG_PPC_PSERIES
3375 /*
3376 * On pSeries, inform the firmware about our capabilities
3377 */
3378 if (of_platform == PLATFORM_PSERIES ||
3379 of_platform == PLATFORM_PSERIES_LPAR)
3380 prom_send_capabilities();
3381#endif
3382
3383 /*
3384 * Copy the CPU hold code
3385 */
3386 if (of_platform != PLATFORM_POWERMAC)
3387 copy_and_flush(0, kbase, 0x100, 0);
3388
3389 /*
3390 * Initialize memory management within prom_init
3391 */
3392 prom_init_mem();
3393
3394 /*
3395 * Determine which cpu is actually running right _now_
3396 */
3397 prom_find_boot_cpu();
3398
3399 /*
3400 * Initialize display devices
3401 */
3402 prom_check_displays();
3403
3404#if defined(CONFIG_PPC64) && defined(__BIG_ENDIAN__)
3405 /*
3406 * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else
3407 * that uses the allocator, we need to make sure we get the top of memory
3408 * available for us here...
3409 */
3410 if (of_platform == PLATFORM_PSERIES)
3411 prom_initialize_tce_table();
3412#endif
3413
3414 /*
3415 * On non-powermacs, try to instantiate RTAS. PowerMacs don't
3416 * have a usable RTAS implementation.
3417 */
3418 if (of_platform != PLATFORM_POWERMAC)
3419 prom_instantiate_rtas();
3420
3421#ifdef CONFIG_PPC64
3422 /* instantiate sml */
3423 prom_instantiate_sml();
3424#endif
3425
3426 /*
3427 * On non-powermacs, put all CPUs in spin-loops.
3428 *
3429 * PowerMacs use a different mechanism to spin CPUs
3430 *
3431 * (This must be done after instanciating RTAS)
3432 */
3433 if (of_platform != PLATFORM_POWERMAC)
3434 prom_hold_cpus();
3435
3436 /*
3437 * Fill in some infos for use by the kernel later on
3438 */
3439 if (prom_memory_limit) {
3440 __be64 val = cpu_to_be64(prom_memory_limit);
3441 prom_setprop(prom.chosen, "/chosen", "linux,memory-limit",
3442 &val, sizeof(val));
3443 }
3444#ifdef CONFIG_PPC64
3445 if (prom_iommu_off)
3446 prom_setprop(prom.chosen, "/chosen", "linux,iommu-off",
3447 NULL, 0);
3448
3449 if (prom_iommu_force_on)
3450 prom_setprop(prom.chosen, "/chosen", "linux,iommu-force-on",
3451 NULL, 0);
3452
3453 if (prom_tce_alloc_start) {
3454 prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-start",
3455 &prom_tce_alloc_start,
3456 sizeof(prom_tce_alloc_start));
3457 prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-end",
3458 &prom_tce_alloc_end,
3459 sizeof(prom_tce_alloc_end));
3460 }
3461#endif
3462
3463 /*
3464 * Fixup any known bugs in the device-tree
3465 */
3466 fixup_device_tree();
3467
3468 /*
3469 * Now finally create the flattened device-tree
3470 */
3471 prom_printf("copying OF device tree...\n");
3472 flatten_device_tree();
3473
3474 /*
3475 * in case stdin is USB and still active on IBM machines...
3476 * Unfortunately quiesce crashes on some powermacs if we have
3477 * closed stdin already (in particular the powerbook 101).
3478 */
3479 if (of_platform != PLATFORM_POWERMAC)
3480 prom_close_stdin();
3481
3482 /*
3483 * Call OF "quiesce" method to shut down pending DMA's from
3484 * devices etc...
3485 */
3486 prom_printf("Quiescing Open Firmware ...\n");
3487 call_prom("quiesce", 0, 0);
3488
3489 /*
3490 * And finally, call the kernel passing it the flattened device
3491 * tree and NULL as r5, thus triggering the new entry point which
3492 * is common to us and kexec
3493 */
3494 hdr = dt_header_start;
3495
3496 prom_printf("Booting Linux via __start() @ 0x%lx ...\n", kbase);
3497 prom_debug("->dt_header_start=0x%lx\n", hdr);
3498
3499#ifdef CONFIG_PPC32
3500 reloc_got2(-offset);
3501#else
3502 unreloc_toc();
3503#endif
3504
3505 /* Move to secure memory if we're supposed to be secure guests. */
3506 setup_secure_guest(kbase, hdr);
3507
3508 __start(hdr, kbase, 0, 0, 0, 0, 0);
3509
3510 return 0;
3511}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Procedures for interfacing to Open Firmware.
4 *
5 * Paul Mackerras August 1996.
6 * Copyright (C) 1996-2005 Paul Mackerras.
7 *
8 * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
9 * {engebret|bergner}@us.ibm.com
10 */
11
12#undef DEBUG_PROM
13
14/* we cannot use FORTIFY as it brings in new symbols */
15#define __NO_FORTIFY
16
17#include <stdarg.h>
18#include <linux/kernel.h>
19#include <linux/string.h>
20#include <linux/init.h>
21#include <linux/threads.h>
22#include <linux/spinlock.h>
23#include <linux/types.h>
24#include <linux/pci.h>
25#include <linux/proc_fs.h>
26#include <linux/delay.h>
27#include <linux/initrd.h>
28#include <linux/bitops.h>
29#include <asm/prom.h>
30#include <asm/rtas.h>
31#include <asm/page.h>
32#include <asm/processor.h>
33#include <asm/irq.h>
34#include <asm/io.h>
35#include <asm/smp.h>
36#include <asm/mmu.h>
37#include <asm/pgtable.h>
38#include <asm/iommu.h>
39#include <asm/btext.h>
40#include <asm/sections.h>
41#include <asm/machdep.h>
42#include <asm/asm-prototypes.h>
43#include <asm/ultravisor-api.h>
44
45#include <linux/linux_logo.h>
46
47/* All of prom_init bss lives here */
48#define __prombss __section(.bss.prominit)
49
50/*
51 * Eventually bump that one up
52 */
53#define DEVTREE_CHUNK_SIZE 0x100000
54
55/*
56 * This is the size of the local memory reserve map that gets copied
57 * into the boot params passed to the kernel. That size is totally
58 * flexible as the kernel just reads the list until it encounters an
59 * entry with size 0, so it can be changed without breaking binary
60 * compatibility
61 */
62#define MEM_RESERVE_MAP_SIZE 8
63
64/*
65 * prom_init() is called very early on, before the kernel text
66 * and data have been mapped to KERNELBASE. At this point the code
67 * is running at whatever address it has been loaded at.
68 * On ppc32 we compile with -mrelocatable, which means that references
69 * to extern and static variables get relocated automatically.
70 * ppc64 objects are always relocatable, we just need to relocate the
71 * TOC.
72 *
73 * Because OF may have mapped I/O devices into the area starting at
74 * KERNELBASE, particularly on CHRP machines, we can't safely call
75 * OF once the kernel has been mapped to KERNELBASE. Therefore all
76 * OF calls must be done within prom_init().
77 *
78 * ADDR is used in calls to call_prom. The 4th and following
79 * arguments to call_prom should be 32-bit values.
80 * On ppc64, 64 bit values are truncated to 32 bits (and
81 * fortunately don't get interpreted as two arguments).
82 */
83#define ADDR(x) (u32)(unsigned long)(x)
84
85#ifdef CONFIG_PPC64
86#define OF_WORKAROUNDS 0
87#else
88#define OF_WORKAROUNDS of_workarounds
89static int of_workarounds __prombss;
90#endif
91
92#define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */
93#define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */
94
95#define PROM_BUG() do { \
96 prom_printf("kernel BUG at %s line 0x%x!\n", \
97 __FILE__, __LINE__); \
98 __builtin_trap(); \
99} while (0)
100
101#ifdef DEBUG_PROM
102#define prom_debug(x...) prom_printf(x)
103#else
104#define prom_debug(x...) do { } while (0)
105#endif
106
107
108typedef u32 prom_arg_t;
109
110struct prom_args {
111 __be32 service;
112 __be32 nargs;
113 __be32 nret;
114 __be32 args[10];
115};
116
117struct prom_t {
118 ihandle root;
119 phandle chosen;
120 int cpu;
121 ihandle stdout;
122 ihandle mmumap;
123 ihandle memory;
124};
125
126struct mem_map_entry {
127 __be64 base;
128 __be64 size;
129};
130
131typedef __be32 cell_t;
132
133extern void __start(unsigned long r3, unsigned long r4, unsigned long r5,
134 unsigned long r6, unsigned long r7, unsigned long r8,
135 unsigned long r9);
136
137#ifdef CONFIG_PPC64
138extern int enter_prom(struct prom_args *args, unsigned long entry);
139#else
140static inline int enter_prom(struct prom_args *args, unsigned long entry)
141{
142 return ((int (*)(struct prom_args *))entry)(args);
143}
144#endif
145
146extern void copy_and_flush(unsigned long dest, unsigned long src,
147 unsigned long size, unsigned long offset);
148
149/* prom structure */
150static struct prom_t __prombss prom;
151
152static unsigned long __prombss prom_entry;
153
154static char __prombss of_stdout_device[256];
155static char __prombss prom_scratch[256];
156
157static unsigned long __prombss dt_header_start;
158static unsigned long __prombss dt_struct_start, dt_struct_end;
159static unsigned long __prombss dt_string_start, dt_string_end;
160
161static unsigned long __prombss prom_initrd_start, prom_initrd_end;
162
163#ifdef CONFIG_PPC64
164static int __prombss prom_iommu_force_on;
165static int __prombss prom_iommu_off;
166static unsigned long __prombss prom_tce_alloc_start;
167static unsigned long __prombss prom_tce_alloc_end;
168#endif
169
170#ifdef CONFIG_PPC_PSERIES
171static bool __prombss prom_radix_disable;
172static bool __prombss prom_xive_disable;
173#endif
174
175#ifdef CONFIG_PPC_SVM
176static bool __prombss prom_svm_enable;
177#endif
178
179struct platform_support {
180 bool hash_mmu;
181 bool radix_mmu;
182 bool radix_gtse;
183 bool xive;
184};
185
186/* Platforms codes are now obsolete in the kernel. Now only used within this
187 * file and ultimately gone too. Feel free to change them if you need, they
188 * are not shared with anything outside of this file anymore
189 */
190#define PLATFORM_PSERIES 0x0100
191#define PLATFORM_PSERIES_LPAR 0x0101
192#define PLATFORM_LPAR 0x0001
193#define PLATFORM_POWERMAC 0x0400
194#define PLATFORM_GENERIC 0x0500
195
196static int __prombss of_platform;
197
198static char __prombss prom_cmd_line[COMMAND_LINE_SIZE];
199
200static unsigned long __prombss prom_memory_limit;
201
202static unsigned long __prombss alloc_top;
203static unsigned long __prombss alloc_top_high;
204static unsigned long __prombss alloc_bottom;
205static unsigned long __prombss rmo_top;
206static unsigned long __prombss ram_top;
207
208static struct mem_map_entry __prombss mem_reserve_map[MEM_RESERVE_MAP_SIZE];
209static int __prombss mem_reserve_cnt;
210
211static cell_t __prombss regbuf[1024];
212
213static bool __prombss rtas_has_query_cpu_stopped;
214
215
216/*
217 * Error results ... some OF calls will return "-1" on error, some
218 * will return 0, some will return either. To simplify, here are
219 * macros to use with any ihandle or phandle return value to check if
220 * it is valid
221 */
222
223#define PROM_ERROR (-1u)
224#define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR)
225#define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR)
226
227/* Copied from lib/string.c and lib/kstrtox.c */
228
229static int __init prom_strcmp(const char *cs, const char *ct)
230{
231 unsigned char c1, c2;
232
233 while (1) {
234 c1 = *cs++;
235 c2 = *ct++;
236 if (c1 != c2)
237 return c1 < c2 ? -1 : 1;
238 if (!c1)
239 break;
240 }
241 return 0;
242}
243
244static char __init *prom_strcpy(char *dest, const char *src)
245{
246 char *tmp = dest;
247
248 while ((*dest++ = *src++) != '\0')
249 /* nothing */;
250 return tmp;
251}
252
253static int __init prom_strncmp(const char *cs, const char *ct, size_t count)
254{
255 unsigned char c1, c2;
256
257 while (count) {
258 c1 = *cs++;
259 c2 = *ct++;
260 if (c1 != c2)
261 return c1 < c2 ? -1 : 1;
262 if (!c1)
263 break;
264 count--;
265 }
266 return 0;
267}
268
269static size_t __init prom_strlen(const char *s)
270{
271 const char *sc;
272
273 for (sc = s; *sc != '\0'; ++sc)
274 /* nothing */;
275 return sc - s;
276}
277
278static int __init prom_memcmp(const void *cs, const void *ct, size_t count)
279{
280 const unsigned char *su1, *su2;
281 int res = 0;
282
283 for (su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
284 if ((res = *su1 - *su2) != 0)
285 break;
286 return res;
287}
288
289static char __init *prom_strstr(const char *s1, const char *s2)
290{
291 size_t l1, l2;
292
293 l2 = prom_strlen(s2);
294 if (!l2)
295 return (char *)s1;
296 l1 = prom_strlen(s1);
297 while (l1 >= l2) {
298 l1--;
299 if (!prom_memcmp(s1, s2, l2))
300 return (char *)s1;
301 s1++;
302 }
303 return NULL;
304}
305
306static size_t __init prom_strlcpy(char *dest, const char *src, size_t size)
307{
308 size_t ret = prom_strlen(src);
309
310 if (size) {
311 size_t len = (ret >= size) ? size - 1 : ret;
312 memcpy(dest, src, len);
313 dest[len] = '\0';
314 }
315 return ret;
316}
317
318#ifdef CONFIG_PPC_PSERIES
319static int __init prom_strtobool(const char *s, bool *res)
320{
321 if (!s)
322 return -EINVAL;
323
324 switch (s[0]) {
325 case 'y':
326 case 'Y':
327 case '1':
328 *res = true;
329 return 0;
330 case 'n':
331 case 'N':
332 case '0':
333 *res = false;
334 return 0;
335 case 'o':
336 case 'O':
337 switch (s[1]) {
338 case 'n':
339 case 'N':
340 *res = true;
341 return 0;
342 case 'f':
343 case 'F':
344 *res = false;
345 return 0;
346 default:
347 break;
348 }
349 default:
350 break;
351 }
352
353 return -EINVAL;
354}
355#endif
356
357/* This is the one and *ONLY* place where we actually call open
358 * firmware.
359 */
360
361static int __init call_prom(const char *service, int nargs, int nret, ...)
362{
363 int i;
364 struct prom_args args;
365 va_list list;
366
367 args.service = cpu_to_be32(ADDR(service));
368 args.nargs = cpu_to_be32(nargs);
369 args.nret = cpu_to_be32(nret);
370
371 va_start(list, nret);
372 for (i = 0; i < nargs; i++)
373 args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
374 va_end(list);
375
376 for (i = 0; i < nret; i++)
377 args.args[nargs+i] = 0;
378
379 if (enter_prom(&args, prom_entry) < 0)
380 return PROM_ERROR;
381
382 return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
383}
384
385static int __init call_prom_ret(const char *service, int nargs, int nret,
386 prom_arg_t *rets, ...)
387{
388 int i;
389 struct prom_args args;
390 va_list list;
391
392 args.service = cpu_to_be32(ADDR(service));
393 args.nargs = cpu_to_be32(nargs);
394 args.nret = cpu_to_be32(nret);
395
396 va_start(list, rets);
397 for (i = 0; i < nargs; i++)
398 args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
399 va_end(list);
400
401 for (i = 0; i < nret; i++)
402 args.args[nargs+i] = 0;
403
404 if (enter_prom(&args, prom_entry) < 0)
405 return PROM_ERROR;
406
407 if (rets != NULL)
408 for (i = 1; i < nret; ++i)
409 rets[i-1] = be32_to_cpu(args.args[nargs+i]);
410
411 return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
412}
413
414
415static void __init prom_print(const char *msg)
416{
417 const char *p, *q;
418
419 if (prom.stdout == 0)
420 return;
421
422 for (p = msg; *p != 0; p = q) {
423 for (q = p; *q != 0 && *q != '\n'; ++q)
424 ;
425 if (q > p)
426 call_prom("write", 3, 1, prom.stdout, p, q - p);
427 if (*q == 0)
428 break;
429 ++q;
430 call_prom("write", 3, 1, prom.stdout, ADDR("\r\n"), 2);
431 }
432}
433
434
435/*
436 * Both prom_print_hex & prom_print_dec takes an unsigned long as input so that
437 * we do not need __udivdi3 or __umoddi3 on 32bits.
438 */
439static void __init prom_print_hex(unsigned long val)
440{
441 int i, nibbles = sizeof(val)*2;
442 char buf[sizeof(val)*2+1];
443
444 for (i = nibbles-1; i >= 0; i--) {
445 buf[i] = (val & 0xf) + '0';
446 if (buf[i] > '9')
447 buf[i] += ('a'-'0'-10);
448 val >>= 4;
449 }
450 buf[nibbles] = '\0';
451 call_prom("write", 3, 1, prom.stdout, buf, nibbles);
452}
453
454/* max number of decimal digits in an unsigned long */
455#define UL_DIGITS 21
456static void __init prom_print_dec(unsigned long val)
457{
458 int i, size;
459 char buf[UL_DIGITS+1];
460
461 for (i = UL_DIGITS-1; i >= 0; i--) {
462 buf[i] = (val % 10) + '0';
463 val = val/10;
464 if (val == 0)
465 break;
466 }
467 /* shift stuff down */
468 size = UL_DIGITS - i;
469 call_prom("write", 3, 1, prom.stdout, buf+i, size);
470}
471
472__printf(1, 2)
473static void __init prom_printf(const char *format, ...)
474{
475 const char *p, *q, *s;
476 va_list args;
477 unsigned long v;
478 long vs;
479 int n = 0;
480
481 va_start(args, format);
482 for (p = format; *p != 0; p = q) {
483 for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q)
484 ;
485 if (q > p)
486 call_prom("write", 3, 1, prom.stdout, p, q - p);
487 if (*q == 0)
488 break;
489 if (*q == '\n') {
490 ++q;
491 call_prom("write", 3, 1, prom.stdout,
492 ADDR("\r\n"), 2);
493 continue;
494 }
495 ++q;
496 if (*q == 0)
497 break;
498 while (*q == 'l') {
499 ++q;
500 ++n;
501 }
502 switch (*q) {
503 case 's':
504 ++q;
505 s = va_arg(args, const char *);
506 prom_print(s);
507 break;
508 case 'x':
509 ++q;
510 switch (n) {
511 case 0:
512 v = va_arg(args, unsigned int);
513 break;
514 case 1:
515 v = va_arg(args, unsigned long);
516 break;
517 case 2:
518 default:
519 v = va_arg(args, unsigned long long);
520 break;
521 }
522 prom_print_hex(v);
523 break;
524 case 'u':
525 ++q;
526 switch (n) {
527 case 0:
528 v = va_arg(args, unsigned int);
529 break;
530 case 1:
531 v = va_arg(args, unsigned long);
532 break;
533 case 2:
534 default:
535 v = va_arg(args, unsigned long long);
536 break;
537 }
538 prom_print_dec(v);
539 break;
540 case 'd':
541 ++q;
542 switch (n) {
543 case 0:
544 vs = va_arg(args, int);
545 break;
546 case 1:
547 vs = va_arg(args, long);
548 break;
549 case 2:
550 default:
551 vs = va_arg(args, long long);
552 break;
553 }
554 if (vs < 0) {
555 prom_print("-");
556 vs = -vs;
557 }
558 prom_print_dec(vs);
559 break;
560 }
561 }
562 va_end(args);
563}
564
565
566static unsigned int __init prom_claim(unsigned long virt, unsigned long size,
567 unsigned long align)
568{
569
570 if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) {
571 /*
572 * Old OF requires we claim physical and virtual separately
573 * and then map explicitly (assuming virtual mode)
574 */
575 int ret;
576 prom_arg_t result;
577
578 ret = call_prom_ret("call-method", 5, 2, &result,
579 ADDR("claim"), prom.memory,
580 align, size, virt);
581 if (ret != 0 || result == -1)
582 return -1;
583 ret = call_prom_ret("call-method", 5, 2, &result,
584 ADDR("claim"), prom.mmumap,
585 align, size, virt);
586 if (ret != 0) {
587 call_prom("call-method", 4, 1, ADDR("release"),
588 prom.memory, size, virt);
589 return -1;
590 }
591 /* the 0x12 is M (coherence) + PP == read/write */
592 call_prom("call-method", 6, 1,
593 ADDR("map"), prom.mmumap, 0x12, size, virt, virt);
594 return virt;
595 }
596 return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size,
597 (prom_arg_t)align);
598}
599
600static void __init __attribute__((noreturn)) prom_panic(const char *reason)
601{
602 prom_print(reason);
603 /* Do not call exit because it clears the screen on pmac
604 * it also causes some sort of double-fault on early pmacs */
605 if (of_platform == PLATFORM_POWERMAC)
606 asm("trap\n");
607
608 /* ToDo: should put up an SRC here on pSeries */
609 call_prom("exit", 0, 0);
610
611 for (;;) /* should never get here */
612 ;
613}
614
615
616static int __init prom_next_node(phandle *nodep)
617{
618 phandle node;
619
620 if ((node = *nodep) != 0
621 && (*nodep = call_prom("child", 1, 1, node)) != 0)
622 return 1;
623 if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
624 return 1;
625 for (;;) {
626 if ((node = call_prom("parent", 1, 1, node)) == 0)
627 return 0;
628 if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
629 return 1;
630 }
631}
632
633static inline int __init prom_getprop(phandle node, const char *pname,
634 void *value, size_t valuelen)
635{
636 return call_prom("getprop", 4, 1, node, ADDR(pname),
637 (u32)(unsigned long) value, (u32) valuelen);
638}
639
640static inline int __init prom_getproplen(phandle node, const char *pname)
641{
642 return call_prom("getproplen", 2, 1, node, ADDR(pname));
643}
644
645static void add_string(char **str, const char *q)
646{
647 char *p = *str;
648
649 while (*q)
650 *p++ = *q++;
651 *p++ = ' ';
652 *str = p;
653}
654
655static char *tohex(unsigned int x)
656{
657 static const char digits[] __initconst = "0123456789abcdef";
658 static char result[9] __prombss;
659 int i;
660
661 result[8] = 0;
662 i = 8;
663 do {
664 --i;
665 result[i] = digits[x & 0xf];
666 x >>= 4;
667 } while (x != 0 && i > 0);
668 return &result[i];
669}
670
671static int __init prom_setprop(phandle node, const char *nodename,
672 const char *pname, void *value, size_t valuelen)
673{
674 char cmd[256], *p;
675
676 if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL))
677 return call_prom("setprop", 4, 1, node, ADDR(pname),
678 (u32)(unsigned long) value, (u32) valuelen);
679
680 /* gah... setprop doesn't work on longtrail, have to use interpret */
681 p = cmd;
682 add_string(&p, "dev");
683 add_string(&p, nodename);
684 add_string(&p, tohex((u32)(unsigned long) value));
685 add_string(&p, tohex(valuelen));
686 add_string(&p, tohex(ADDR(pname)));
687 add_string(&p, tohex(prom_strlen(pname)));
688 add_string(&p, "property");
689 *p = 0;
690 return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd);
691}
692
693/* We can't use the standard versions because of relocation headaches. */
694#define isxdigit(c) (('0' <= (c) && (c) <= '9') \
695 || ('a' <= (c) && (c) <= 'f') \
696 || ('A' <= (c) && (c) <= 'F'))
697
698#define isdigit(c) ('0' <= (c) && (c) <= '9')
699#define islower(c) ('a' <= (c) && (c) <= 'z')
700#define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c))
701
702static unsigned long prom_strtoul(const char *cp, const char **endp)
703{
704 unsigned long result = 0, base = 10, value;
705
706 if (*cp == '0') {
707 base = 8;
708 cp++;
709 if (toupper(*cp) == 'X') {
710 cp++;
711 base = 16;
712 }
713 }
714
715 while (isxdigit(*cp) &&
716 (value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) {
717 result = result * base + value;
718 cp++;
719 }
720
721 if (endp)
722 *endp = cp;
723
724 return result;
725}
726
727static unsigned long prom_memparse(const char *ptr, const char **retptr)
728{
729 unsigned long ret = prom_strtoul(ptr, retptr);
730 int shift = 0;
731
732 /*
733 * We can't use a switch here because GCC *may* generate a
734 * jump table which won't work, because we're not running at
735 * the address we're linked at.
736 */
737 if ('G' == **retptr || 'g' == **retptr)
738 shift = 30;
739
740 if ('M' == **retptr || 'm' == **retptr)
741 shift = 20;
742
743 if ('K' == **retptr || 'k' == **retptr)
744 shift = 10;
745
746 if (shift) {
747 ret <<= shift;
748 (*retptr)++;
749 }
750
751 return ret;
752}
753
754/*
755 * Early parsing of the command line passed to the kernel, used for
756 * "mem=x" and the options that affect the iommu
757 */
758static void __init early_cmdline_parse(void)
759{
760 const char *opt;
761
762 char *p;
763 int l = 0;
764
765 prom_cmd_line[0] = 0;
766 p = prom_cmd_line;
767 if ((long)prom.chosen > 0)
768 l = prom_getprop(prom.chosen, "bootargs", p, COMMAND_LINE_SIZE-1);
769 if (IS_ENABLED(CONFIG_CMDLINE_BOOL) && (l <= 0 || p[0] == '\0')) /* dbl check */
770 prom_strlcpy(prom_cmd_line, CONFIG_CMDLINE, sizeof(prom_cmd_line));
771 prom_printf("command line: %s\n", prom_cmd_line);
772
773#ifdef CONFIG_PPC64
774 opt = prom_strstr(prom_cmd_line, "iommu=");
775 if (opt) {
776 prom_printf("iommu opt is: %s\n", opt);
777 opt += 6;
778 while (*opt && *opt == ' ')
779 opt++;
780 if (!prom_strncmp(opt, "off", 3))
781 prom_iommu_off = 1;
782 else if (!prom_strncmp(opt, "force", 5))
783 prom_iommu_force_on = 1;
784 }
785#endif
786 opt = prom_strstr(prom_cmd_line, "mem=");
787 if (opt) {
788 opt += 4;
789 prom_memory_limit = prom_memparse(opt, (const char **)&opt);
790#ifdef CONFIG_PPC64
791 /* Align to 16 MB == size of ppc64 large page */
792 prom_memory_limit = ALIGN(prom_memory_limit, 0x1000000);
793#endif
794 }
795
796#ifdef CONFIG_PPC_PSERIES
797 prom_radix_disable = !IS_ENABLED(CONFIG_PPC_RADIX_MMU_DEFAULT);
798 opt = prom_strstr(prom_cmd_line, "disable_radix");
799 if (opt) {
800 opt += 13;
801 if (*opt && *opt == '=') {
802 bool val;
803
804 if (prom_strtobool(++opt, &val))
805 prom_radix_disable = false;
806 else
807 prom_radix_disable = val;
808 } else
809 prom_radix_disable = true;
810 }
811 if (prom_radix_disable)
812 prom_debug("Radix disabled from cmdline\n");
813
814 opt = prom_strstr(prom_cmd_line, "xive=off");
815 if (opt) {
816 prom_xive_disable = true;
817 prom_debug("XIVE disabled from cmdline\n");
818 }
819#endif /* CONFIG_PPC_PSERIES */
820
821#ifdef CONFIG_PPC_SVM
822 opt = prom_strstr(prom_cmd_line, "svm=");
823 if (opt) {
824 bool val;
825
826 opt += sizeof("svm=") - 1;
827 if (!prom_strtobool(opt, &val))
828 prom_svm_enable = val;
829 }
830#endif /* CONFIG_PPC_SVM */
831}
832
833#ifdef CONFIG_PPC_PSERIES
834/*
835 * The architecture vector has an array of PVR mask/value pairs,
836 * followed by # option vectors - 1, followed by the option vectors.
837 *
838 * See prom.h for the definition of the bits specified in the
839 * architecture vector.
840 */
841
842/* Firmware expects the value to be n - 1, where n is the # of vectors */
843#define NUM_VECTORS(n) ((n) - 1)
844
845/*
846 * Firmware expects 1 + n - 2, where n is the length of the option vector in
847 * bytes. The 1 accounts for the length byte itself, the - 2 .. ?
848 */
849#define VECTOR_LENGTH(n) (1 + (n) - 2)
850
851struct option_vector1 {
852 u8 byte1;
853 u8 arch_versions;
854 u8 arch_versions3;
855} __packed;
856
857struct option_vector2 {
858 u8 byte1;
859 __be16 reserved;
860 __be32 real_base;
861 __be32 real_size;
862 __be32 virt_base;
863 __be32 virt_size;
864 __be32 load_base;
865 __be32 min_rma;
866 __be32 min_load;
867 u8 min_rma_percent;
868 u8 max_pft_size;
869} __packed;
870
871struct option_vector3 {
872 u8 byte1;
873 u8 byte2;
874} __packed;
875
876struct option_vector4 {
877 u8 byte1;
878 u8 min_vp_cap;
879} __packed;
880
881struct option_vector5 {
882 u8 byte1;
883 u8 byte2;
884 u8 byte3;
885 u8 cmo;
886 u8 associativity;
887 u8 bin_opts;
888 u8 micro_checkpoint;
889 u8 reserved0;
890 __be32 max_cpus;
891 __be16 papr_level;
892 __be16 reserved1;
893 u8 platform_facilities;
894 u8 reserved2;
895 __be16 reserved3;
896 u8 subprocessors;
897 u8 byte22;
898 u8 intarch;
899 u8 mmu;
900 u8 hash_ext;
901 u8 radix_ext;
902} __packed;
903
904struct option_vector6 {
905 u8 reserved;
906 u8 secondary_pteg;
907 u8 os_name;
908} __packed;
909
910struct ibm_arch_vec {
911 struct { u32 mask, val; } pvrs[12];
912
913 u8 num_vectors;
914
915 u8 vec1_len;
916 struct option_vector1 vec1;
917
918 u8 vec2_len;
919 struct option_vector2 vec2;
920
921 u8 vec3_len;
922 struct option_vector3 vec3;
923
924 u8 vec4_len;
925 struct option_vector4 vec4;
926
927 u8 vec5_len;
928 struct option_vector5 vec5;
929
930 u8 vec6_len;
931 struct option_vector6 vec6;
932} __packed;
933
934static const struct ibm_arch_vec ibm_architecture_vec_template __initconst = {
935 .pvrs = {
936 {
937 .mask = cpu_to_be32(0xfffe0000), /* POWER5/POWER5+ */
938 .val = cpu_to_be32(0x003a0000),
939 },
940 {
941 .mask = cpu_to_be32(0xffff0000), /* POWER6 */
942 .val = cpu_to_be32(0x003e0000),
943 },
944 {
945 .mask = cpu_to_be32(0xffff0000), /* POWER7 */
946 .val = cpu_to_be32(0x003f0000),
947 },
948 {
949 .mask = cpu_to_be32(0xffff0000), /* POWER8E */
950 .val = cpu_to_be32(0x004b0000),
951 },
952 {
953 .mask = cpu_to_be32(0xffff0000), /* POWER8NVL */
954 .val = cpu_to_be32(0x004c0000),
955 },
956 {
957 .mask = cpu_to_be32(0xffff0000), /* POWER8 */
958 .val = cpu_to_be32(0x004d0000),
959 },
960 {
961 .mask = cpu_to_be32(0xffff0000), /* POWER9 */
962 .val = cpu_to_be32(0x004e0000),
963 },
964 {
965 .mask = cpu_to_be32(0xffffffff), /* all 3.00-compliant */
966 .val = cpu_to_be32(0x0f000005),
967 },
968 {
969 .mask = cpu_to_be32(0xffffffff), /* all 2.07-compliant */
970 .val = cpu_to_be32(0x0f000004),
971 },
972 {
973 .mask = cpu_to_be32(0xffffffff), /* all 2.06-compliant */
974 .val = cpu_to_be32(0x0f000003),
975 },
976 {
977 .mask = cpu_to_be32(0xffffffff), /* all 2.05-compliant */
978 .val = cpu_to_be32(0x0f000002),
979 },
980 {
981 .mask = cpu_to_be32(0xfffffffe), /* all 2.04-compliant and earlier */
982 .val = cpu_to_be32(0x0f000001),
983 },
984 },
985
986 .num_vectors = NUM_VECTORS(6),
987
988 .vec1_len = VECTOR_LENGTH(sizeof(struct option_vector1)),
989 .vec1 = {
990 .byte1 = 0,
991 .arch_versions = OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 |
992 OV1_PPC_2_04 | OV1_PPC_2_05 | OV1_PPC_2_06 | OV1_PPC_2_07,
993 .arch_versions3 = OV1_PPC_3_00,
994 },
995
996 .vec2_len = VECTOR_LENGTH(sizeof(struct option_vector2)),
997 /* option vector 2: Open Firmware options supported */
998 .vec2 = {
999 .byte1 = OV2_REAL_MODE,
1000 .reserved = 0,
1001 .real_base = cpu_to_be32(0xffffffff),
1002 .real_size = cpu_to_be32(0xffffffff),
1003 .virt_base = cpu_to_be32(0xffffffff),
1004 .virt_size = cpu_to_be32(0xffffffff),
1005 .load_base = cpu_to_be32(0xffffffff),
1006 .min_rma = cpu_to_be32(512), /* 512MB min RMA */
1007 .min_load = cpu_to_be32(0xffffffff), /* full client load */
1008 .min_rma_percent = 0, /* min RMA percentage of total RAM */
1009 .max_pft_size = 48, /* max log_2(hash table size) */
1010 },
1011
1012 .vec3_len = VECTOR_LENGTH(sizeof(struct option_vector3)),
1013 /* option vector 3: processor options supported */
1014 .vec3 = {
1015 .byte1 = 0, /* don't ignore, don't halt */
1016 .byte2 = OV3_FP | OV3_VMX | OV3_DFP,
1017 },
1018
1019 .vec4_len = VECTOR_LENGTH(sizeof(struct option_vector4)),
1020 /* option vector 4: IBM PAPR implementation */
1021 .vec4 = {
1022 .byte1 = 0, /* don't halt */
1023 .min_vp_cap = OV4_MIN_ENT_CAP, /* minimum VP entitled capacity */
1024 },
1025
1026 .vec5_len = VECTOR_LENGTH(sizeof(struct option_vector5)),
1027 /* option vector 5: PAPR/OF options */
1028 .vec5 = {
1029 .byte1 = 0, /* don't ignore, don't halt */
1030 .byte2 = OV5_FEAT(OV5_LPAR) | OV5_FEAT(OV5_SPLPAR) | OV5_FEAT(OV5_LARGE_PAGES) |
1031 OV5_FEAT(OV5_DRCONF_MEMORY) | OV5_FEAT(OV5_DONATE_DEDICATE_CPU) |
1032#ifdef CONFIG_PCI_MSI
1033 /* PCIe/MSI support. Without MSI full PCIe is not supported */
1034 OV5_FEAT(OV5_MSI),
1035#else
1036 0,
1037#endif
1038 .byte3 = 0,
1039 .cmo =
1040#ifdef CONFIG_PPC_SMLPAR
1041 OV5_FEAT(OV5_CMO) | OV5_FEAT(OV5_XCMO),
1042#else
1043 0,
1044#endif
1045 .associativity = OV5_FEAT(OV5_TYPE1_AFFINITY) | OV5_FEAT(OV5_PRRN),
1046 .bin_opts = OV5_FEAT(OV5_RESIZE_HPT) | OV5_FEAT(OV5_HP_EVT),
1047 .micro_checkpoint = 0,
1048 .reserved0 = 0,
1049 .max_cpus = cpu_to_be32(NR_CPUS), /* number of cores supported */
1050 .papr_level = 0,
1051 .reserved1 = 0,
1052 .platform_facilities = OV5_FEAT(OV5_PFO_HW_RNG) | OV5_FEAT(OV5_PFO_HW_ENCR) | OV5_FEAT(OV5_PFO_HW_842),
1053 .reserved2 = 0,
1054 .reserved3 = 0,
1055 .subprocessors = 1,
1056 .byte22 = OV5_FEAT(OV5_DRMEM_V2),
1057 .intarch = 0,
1058 .mmu = 0,
1059 .hash_ext = 0,
1060 .radix_ext = 0,
1061 },
1062
1063 /* option vector 6: IBM PAPR hints */
1064 .vec6_len = VECTOR_LENGTH(sizeof(struct option_vector6)),
1065 .vec6 = {
1066 .reserved = 0,
1067 .secondary_pteg = 0,
1068 .os_name = OV6_LINUX,
1069 },
1070};
1071
1072static struct ibm_arch_vec __prombss ibm_architecture_vec ____cacheline_aligned;
1073
1074/* Old method - ELF header with PT_NOTE sections only works on BE */
1075#ifdef __BIG_ENDIAN__
1076static const struct fake_elf {
1077 Elf32_Ehdr elfhdr;
1078 Elf32_Phdr phdr[2];
1079 struct chrpnote {
1080 u32 namesz;
1081 u32 descsz;
1082 u32 type;
1083 char name[8]; /* "PowerPC" */
1084 struct chrpdesc {
1085 u32 real_mode;
1086 u32 real_base;
1087 u32 real_size;
1088 u32 virt_base;
1089 u32 virt_size;
1090 u32 load_base;
1091 } chrpdesc;
1092 } chrpnote;
1093 struct rpanote {
1094 u32 namesz;
1095 u32 descsz;
1096 u32 type;
1097 char name[24]; /* "IBM,RPA-Client-Config" */
1098 struct rpadesc {
1099 u32 lpar_affinity;
1100 u32 min_rmo_size;
1101 u32 min_rmo_percent;
1102 u32 max_pft_size;
1103 u32 splpar;
1104 u32 min_load;
1105 u32 new_mem_def;
1106 u32 ignore_me;
1107 } rpadesc;
1108 } rpanote;
1109} fake_elf __initconst = {
1110 .elfhdr = {
1111 .e_ident = { 0x7f, 'E', 'L', 'F',
1112 ELFCLASS32, ELFDATA2MSB, EV_CURRENT },
1113 .e_type = ET_EXEC, /* yeah right */
1114 .e_machine = EM_PPC,
1115 .e_version = EV_CURRENT,
1116 .e_phoff = offsetof(struct fake_elf, phdr),
1117 .e_phentsize = sizeof(Elf32_Phdr),
1118 .e_phnum = 2
1119 },
1120 .phdr = {
1121 [0] = {
1122 .p_type = PT_NOTE,
1123 .p_offset = offsetof(struct fake_elf, chrpnote),
1124 .p_filesz = sizeof(struct chrpnote)
1125 }, [1] = {
1126 .p_type = PT_NOTE,
1127 .p_offset = offsetof(struct fake_elf, rpanote),
1128 .p_filesz = sizeof(struct rpanote)
1129 }
1130 },
1131 .chrpnote = {
1132 .namesz = sizeof("PowerPC"),
1133 .descsz = sizeof(struct chrpdesc),
1134 .type = 0x1275,
1135 .name = "PowerPC",
1136 .chrpdesc = {
1137 .real_mode = ~0U, /* ~0 means "don't care" */
1138 .real_base = ~0U,
1139 .real_size = ~0U,
1140 .virt_base = ~0U,
1141 .virt_size = ~0U,
1142 .load_base = ~0U
1143 },
1144 },
1145 .rpanote = {
1146 .namesz = sizeof("IBM,RPA-Client-Config"),
1147 .descsz = sizeof(struct rpadesc),
1148 .type = 0x12759999,
1149 .name = "IBM,RPA-Client-Config",
1150 .rpadesc = {
1151 .lpar_affinity = 0,
1152 .min_rmo_size = 64, /* in megabytes */
1153 .min_rmo_percent = 0,
1154 .max_pft_size = 48, /* 2^48 bytes max PFT size */
1155 .splpar = 1,
1156 .min_load = ~0U,
1157 .new_mem_def = 0
1158 }
1159 }
1160};
1161#endif /* __BIG_ENDIAN__ */
1162
1163static int __init prom_count_smt_threads(void)
1164{
1165 phandle node;
1166 char type[64];
1167 unsigned int plen;
1168
1169 /* Pick up th first CPU node we can find */
1170 for (node = 0; prom_next_node(&node); ) {
1171 type[0] = 0;
1172 prom_getprop(node, "device_type", type, sizeof(type));
1173
1174 if (prom_strcmp(type, "cpu"))
1175 continue;
1176 /*
1177 * There is an entry for each smt thread, each entry being
1178 * 4 bytes long. All cpus should have the same number of
1179 * smt threads, so return after finding the first.
1180 */
1181 plen = prom_getproplen(node, "ibm,ppc-interrupt-server#s");
1182 if (plen == PROM_ERROR)
1183 break;
1184 plen >>= 2;
1185 prom_debug("Found %lu smt threads per core\n", (unsigned long)plen);
1186
1187 /* Sanity check */
1188 if (plen < 1 || plen > 64) {
1189 prom_printf("Threads per core %lu out of bounds, assuming 1\n",
1190 (unsigned long)plen);
1191 return 1;
1192 }
1193 return plen;
1194 }
1195 prom_debug("No threads found, assuming 1 per core\n");
1196
1197 return 1;
1198
1199}
1200
1201static void __init prom_parse_mmu_model(u8 val,
1202 struct platform_support *support)
1203{
1204 switch (val) {
1205 case OV5_FEAT(OV5_MMU_DYNAMIC):
1206 case OV5_FEAT(OV5_MMU_EITHER): /* Either Available */
1207 prom_debug("MMU - either supported\n");
1208 support->radix_mmu = !prom_radix_disable;
1209 support->hash_mmu = true;
1210 break;
1211 case OV5_FEAT(OV5_MMU_RADIX): /* Only Radix */
1212 prom_debug("MMU - radix only\n");
1213 if (prom_radix_disable) {
1214 /*
1215 * If we __have__ to do radix, we're better off ignoring
1216 * the command line rather than not booting.
1217 */
1218 prom_printf("WARNING: Ignoring cmdline option disable_radix\n");
1219 }
1220 support->radix_mmu = true;
1221 break;
1222 case OV5_FEAT(OV5_MMU_HASH):
1223 prom_debug("MMU - hash only\n");
1224 support->hash_mmu = true;
1225 break;
1226 default:
1227 prom_debug("Unknown mmu support option: 0x%x\n", val);
1228 break;
1229 }
1230}
1231
1232static void __init prom_parse_xive_model(u8 val,
1233 struct platform_support *support)
1234{
1235 switch (val) {
1236 case OV5_FEAT(OV5_XIVE_EITHER): /* Either Available */
1237 prom_debug("XIVE - either mode supported\n");
1238 support->xive = !prom_xive_disable;
1239 break;
1240 case OV5_FEAT(OV5_XIVE_EXPLOIT): /* Only Exploitation mode */
1241 prom_debug("XIVE - exploitation mode supported\n");
1242 if (prom_xive_disable) {
1243 /*
1244 * If we __have__ to do XIVE, we're better off ignoring
1245 * the command line rather than not booting.
1246 */
1247 prom_printf("WARNING: Ignoring cmdline option xive=off\n");
1248 }
1249 support->xive = true;
1250 break;
1251 case OV5_FEAT(OV5_XIVE_LEGACY): /* Only Legacy mode */
1252 prom_debug("XIVE - legacy mode supported\n");
1253 break;
1254 default:
1255 prom_debug("Unknown xive support option: 0x%x\n", val);
1256 break;
1257 }
1258}
1259
1260static void __init prom_parse_platform_support(u8 index, u8 val,
1261 struct platform_support *support)
1262{
1263 switch (index) {
1264 case OV5_INDX(OV5_MMU_SUPPORT): /* MMU Model */
1265 prom_parse_mmu_model(val & OV5_FEAT(OV5_MMU_SUPPORT), support);
1266 break;
1267 case OV5_INDX(OV5_RADIX_GTSE): /* Radix Extensions */
1268 if (val & OV5_FEAT(OV5_RADIX_GTSE)) {
1269 prom_debug("Radix - GTSE supported\n");
1270 support->radix_gtse = true;
1271 }
1272 break;
1273 case OV5_INDX(OV5_XIVE_SUPPORT): /* Interrupt mode */
1274 prom_parse_xive_model(val & OV5_FEAT(OV5_XIVE_SUPPORT),
1275 support);
1276 break;
1277 }
1278}
1279
1280static void __init prom_check_platform_support(void)
1281{
1282 struct platform_support supported = {
1283 .hash_mmu = false,
1284 .radix_mmu = false,
1285 .radix_gtse = false,
1286 .xive = false
1287 };
1288 int prop_len = prom_getproplen(prom.chosen,
1289 "ibm,arch-vec-5-platform-support");
1290
1291 /*
1292 * First copy the architecture vec template
1293 *
1294 * use memcpy() instead of *vec = *vec_template so that GCC replaces it
1295 * by __memcpy() when KASAN is active
1296 */
1297 memcpy(&ibm_architecture_vec, &ibm_architecture_vec_template,
1298 sizeof(ibm_architecture_vec));
1299
1300 if (prop_len > 1) {
1301 int i;
1302 u8 vec[8];
1303 prom_debug("Found ibm,arch-vec-5-platform-support, len: %d\n",
1304 prop_len);
1305 if (prop_len > sizeof(vec))
1306 prom_printf("WARNING: ibm,arch-vec-5-platform-support longer than expected (len: %d)\n",
1307 prop_len);
1308 prom_getprop(prom.chosen, "ibm,arch-vec-5-platform-support",
1309 &vec, sizeof(vec));
1310 for (i = 0; i < sizeof(vec); i += 2) {
1311 prom_debug("%d: index = 0x%x val = 0x%x\n", i / 2
1312 , vec[i]
1313 , vec[i + 1]);
1314 prom_parse_platform_support(vec[i], vec[i + 1],
1315 &supported);
1316 }
1317 }
1318
1319 if (supported.radix_mmu && supported.radix_gtse &&
1320 IS_ENABLED(CONFIG_PPC_RADIX_MMU)) {
1321 /* Radix preferred - but we require GTSE for now */
1322 prom_debug("Asking for radix with GTSE\n");
1323 ibm_architecture_vec.vec5.mmu = OV5_FEAT(OV5_MMU_RADIX);
1324 ibm_architecture_vec.vec5.radix_ext = OV5_FEAT(OV5_RADIX_GTSE);
1325 } else if (supported.hash_mmu) {
1326 /* Default to hash mmu (if we can) */
1327 prom_debug("Asking for hash\n");
1328 ibm_architecture_vec.vec5.mmu = OV5_FEAT(OV5_MMU_HASH);
1329 } else {
1330 /* We're probably on a legacy hypervisor */
1331 prom_debug("Assuming legacy hash support\n");
1332 }
1333
1334 if (supported.xive) {
1335 prom_debug("Asking for XIVE\n");
1336 ibm_architecture_vec.vec5.intarch = OV5_FEAT(OV5_XIVE_EXPLOIT);
1337 }
1338}
1339
1340static void __init prom_send_capabilities(void)
1341{
1342 ihandle root;
1343 prom_arg_t ret;
1344 u32 cores;
1345
1346 /* Check ibm,arch-vec-5-platform-support and fixup vec5 if required */
1347 prom_check_platform_support();
1348
1349 root = call_prom("open", 1, 1, ADDR("/"));
1350 if (root != 0) {
1351 /* We need to tell the FW about the number of cores we support.
1352 *
1353 * To do that, we count the number of threads on the first core
1354 * (we assume this is the same for all cores) and use it to
1355 * divide NR_CPUS.
1356 */
1357
1358 cores = DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads());
1359 prom_printf("Max number of cores passed to firmware: %u (NR_CPUS = %d)\n",
1360 cores, NR_CPUS);
1361
1362 ibm_architecture_vec.vec5.max_cpus = cpu_to_be32(cores);
1363
1364 /* try calling the ibm,client-architecture-support method */
1365 prom_printf("Calling ibm,client-architecture-support...");
1366 if (call_prom_ret("call-method", 3, 2, &ret,
1367 ADDR("ibm,client-architecture-support"),
1368 root,
1369 ADDR(&ibm_architecture_vec)) == 0) {
1370 /* the call exists... */
1371 if (ret)
1372 prom_printf("\nWARNING: ibm,client-architecture"
1373 "-support call FAILED!\n");
1374 call_prom("close", 1, 0, root);
1375 prom_printf(" done\n");
1376 return;
1377 }
1378 call_prom("close", 1, 0, root);
1379 prom_printf(" not implemented\n");
1380 }
1381
1382#ifdef __BIG_ENDIAN__
1383 {
1384 ihandle elfloader;
1385
1386 /* no ibm,client-architecture-support call, try the old way */
1387 elfloader = call_prom("open", 1, 1,
1388 ADDR("/packages/elf-loader"));
1389 if (elfloader == 0) {
1390 prom_printf("couldn't open /packages/elf-loader\n");
1391 return;
1392 }
1393 call_prom("call-method", 3, 1, ADDR("process-elf-header"),
1394 elfloader, ADDR(&fake_elf));
1395 call_prom("close", 1, 0, elfloader);
1396 }
1397#endif /* __BIG_ENDIAN__ */
1398}
1399#endif /* CONFIG_PPC_PSERIES */
1400
1401/*
1402 * Memory allocation strategy... our layout is normally:
1403 *
1404 * at 14Mb or more we have vmlinux, then a gap and initrd. In some
1405 * rare cases, initrd might end up being before the kernel though.
1406 * We assume this won't override the final kernel at 0, we have no
1407 * provision to handle that in this version, but it should hopefully
1408 * never happen.
1409 *
1410 * alloc_top is set to the top of RMO, eventually shrink down if the
1411 * TCEs overlap
1412 *
1413 * alloc_bottom is set to the top of kernel/initrd
1414 *
1415 * from there, allocations are done this way : rtas is allocated
1416 * topmost, and the device-tree is allocated from the bottom. We try
1417 * to grow the device-tree allocation as we progress. If we can't,
1418 * then we fail, we don't currently have a facility to restart
1419 * elsewhere, but that shouldn't be necessary.
1420 *
1421 * Note that calls to reserve_mem have to be done explicitly, memory
1422 * allocated with either alloc_up or alloc_down isn't automatically
1423 * reserved.
1424 */
1425
1426
1427/*
1428 * Allocates memory in the RMO upward from the kernel/initrd
1429 *
1430 * When align is 0, this is a special case, it means to allocate in place
1431 * at the current location of alloc_bottom or fail (that is basically
1432 * extending the previous allocation). Used for the device-tree flattening
1433 */
1434static unsigned long __init alloc_up(unsigned long size, unsigned long align)
1435{
1436 unsigned long base = alloc_bottom;
1437 unsigned long addr = 0;
1438
1439 if (align)
1440 base = _ALIGN_UP(base, align);
1441 prom_debug("%s(%lx, %lx)\n", __func__, size, align);
1442 if (ram_top == 0)
1443 prom_panic("alloc_up() called with mem not initialized\n");
1444
1445 if (align)
1446 base = _ALIGN_UP(alloc_bottom, align);
1447 else
1448 base = alloc_bottom;
1449
1450 for(; (base + size) <= alloc_top;
1451 base = _ALIGN_UP(base + 0x100000, align)) {
1452 prom_debug(" trying: 0x%lx\n\r", base);
1453 addr = (unsigned long)prom_claim(base, size, 0);
1454 if (addr != PROM_ERROR && addr != 0)
1455 break;
1456 addr = 0;
1457 if (align == 0)
1458 break;
1459 }
1460 if (addr == 0)
1461 return 0;
1462 alloc_bottom = addr + size;
1463
1464 prom_debug(" -> %lx\n", addr);
1465 prom_debug(" alloc_bottom : %lx\n", alloc_bottom);
1466 prom_debug(" alloc_top : %lx\n", alloc_top);
1467 prom_debug(" alloc_top_hi : %lx\n", alloc_top_high);
1468 prom_debug(" rmo_top : %lx\n", rmo_top);
1469 prom_debug(" ram_top : %lx\n", ram_top);
1470
1471 return addr;
1472}
1473
1474/*
1475 * Allocates memory downward, either from top of RMO, or if highmem
1476 * is set, from the top of RAM. Note that this one doesn't handle
1477 * failures. It does claim memory if highmem is not set.
1478 */
1479static unsigned long __init alloc_down(unsigned long size, unsigned long align,
1480 int highmem)
1481{
1482 unsigned long base, addr = 0;
1483
1484 prom_debug("%s(%lx, %lx, %s)\n", __func__, size, align,
1485 highmem ? "(high)" : "(low)");
1486 if (ram_top == 0)
1487 prom_panic("alloc_down() called with mem not initialized\n");
1488
1489 if (highmem) {
1490 /* Carve out storage for the TCE table. */
1491 addr = _ALIGN_DOWN(alloc_top_high - size, align);
1492 if (addr <= alloc_bottom)
1493 return 0;
1494 /* Will we bump into the RMO ? If yes, check out that we
1495 * didn't overlap existing allocations there, if we did,
1496 * we are dead, we must be the first in town !
1497 */
1498 if (addr < rmo_top) {
1499 /* Good, we are first */
1500 if (alloc_top == rmo_top)
1501 alloc_top = rmo_top = addr;
1502 else
1503 return 0;
1504 }
1505 alloc_top_high = addr;
1506 goto bail;
1507 }
1508
1509 base = _ALIGN_DOWN(alloc_top - size, align);
1510 for (; base > alloc_bottom;
1511 base = _ALIGN_DOWN(base - 0x100000, align)) {
1512 prom_debug(" trying: 0x%lx\n\r", base);
1513 addr = (unsigned long)prom_claim(base, size, 0);
1514 if (addr != PROM_ERROR && addr != 0)
1515 break;
1516 addr = 0;
1517 }
1518 if (addr == 0)
1519 return 0;
1520 alloc_top = addr;
1521
1522 bail:
1523 prom_debug(" -> %lx\n", addr);
1524 prom_debug(" alloc_bottom : %lx\n", alloc_bottom);
1525 prom_debug(" alloc_top : %lx\n", alloc_top);
1526 prom_debug(" alloc_top_hi : %lx\n", alloc_top_high);
1527 prom_debug(" rmo_top : %lx\n", rmo_top);
1528 prom_debug(" ram_top : %lx\n", ram_top);
1529
1530 return addr;
1531}
1532
1533/*
1534 * Parse a "reg" cell
1535 */
1536static unsigned long __init prom_next_cell(int s, cell_t **cellp)
1537{
1538 cell_t *p = *cellp;
1539 unsigned long r = 0;
1540
1541 /* Ignore more than 2 cells */
1542 while (s > sizeof(unsigned long) / 4) {
1543 p++;
1544 s--;
1545 }
1546 r = be32_to_cpu(*p++);
1547#ifdef CONFIG_PPC64
1548 if (s > 1) {
1549 r <<= 32;
1550 r |= be32_to_cpu(*(p++));
1551 }
1552#endif
1553 *cellp = p;
1554 return r;
1555}
1556
1557/*
1558 * Very dumb function for adding to the memory reserve list, but
1559 * we don't need anything smarter at this point
1560 *
1561 * XXX Eventually check for collisions. They should NEVER happen.
1562 * If problems seem to show up, it would be a good start to track
1563 * them down.
1564 */
1565static void __init reserve_mem(u64 base, u64 size)
1566{
1567 u64 top = base + size;
1568 unsigned long cnt = mem_reserve_cnt;
1569
1570 if (size == 0)
1571 return;
1572
1573 /* We need to always keep one empty entry so that we
1574 * have our terminator with "size" set to 0 since we are
1575 * dumb and just copy this entire array to the boot params
1576 */
1577 base = _ALIGN_DOWN(base, PAGE_SIZE);
1578 top = _ALIGN_UP(top, PAGE_SIZE);
1579 size = top - base;
1580
1581 if (cnt >= (MEM_RESERVE_MAP_SIZE - 1))
1582 prom_panic("Memory reserve map exhausted !\n");
1583 mem_reserve_map[cnt].base = cpu_to_be64(base);
1584 mem_reserve_map[cnt].size = cpu_to_be64(size);
1585 mem_reserve_cnt = cnt + 1;
1586}
1587
1588/*
1589 * Initialize memory allocation mechanism, parse "memory" nodes and
1590 * obtain that way the top of memory and RMO to setup out local allocator
1591 */
1592static void __init prom_init_mem(void)
1593{
1594 phandle node;
1595 char type[64];
1596 unsigned int plen;
1597 cell_t *p, *endp;
1598 __be32 val;
1599 u32 rac, rsc;
1600
1601 /*
1602 * We iterate the memory nodes to find
1603 * 1) top of RMO (first node)
1604 * 2) top of memory
1605 */
1606 val = cpu_to_be32(2);
1607 prom_getprop(prom.root, "#address-cells", &val, sizeof(val));
1608 rac = be32_to_cpu(val);
1609 val = cpu_to_be32(1);
1610 prom_getprop(prom.root, "#size-cells", &val, sizeof(rsc));
1611 rsc = be32_to_cpu(val);
1612 prom_debug("root_addr_cells: %x\n", rac);
1613 prom_debug("root_size_cells: %x\n", rsc);
1614
1615 prom_debug("scanning memory:\n");
1616
1617 for (node = 0; prom_next_node(&node); ) {
1618 type[0] = 0;
1619 prom_getprop(node, "device_type", type, sizeof(type));
1620
1621 if (type[0] == 0) {
1622 /*
1623 * CHRP Longtrail machines have no device_type
1624 * on the memory node, so check the name instead...
1625 */
1626 prom_getprop(node, "name", type, sizeof(type));
1627 }
1628 if (prom_strcmp(type, "memory"))
1629 continue;
1630
1631 plen = prom_getprop(node, "reg", regbuf, sizeof(regbuf));
1632 if (plen > sizeof(regbuf)) {
1633 prom_printf("memory node too large for buffer !\n");
1634 plen = sizeof(regbuf);
1635 }
1636 p = regbuf;
1637 endp = p + (plen / sizeof(cell_t));
1638
1639#ifdef DEBUG_PROM
1640 memset(prom_scratch, 0, sizeof(prom_scratch));
1641 call_prom("package-to-path", 3, 1, node, prom_scratch,
1642 sizeof(prom_scratch) - 1);
1643 prom_debug(" node %s :\n", prom_scratch);
1644#endif /* DEBUG_PROM */
1645
1646 while ((endp - p) >= (rac + rsc)) {
1647 unsigned long base, size;
1648
1649 base = prom_next_cell(rac, &p);
1650 size = prom_next_cell(rsc, &p);
1651
1652 if (size == 0)
1653 continue;
1654 prom_debug(" %lx %lx\n", base, size);
1655 if (base == 0 && (of_platform & PLATFORM_LPAR))
1656 rmo_top = size;
1657 if ((base + size) > ram_top)
1658 ram_top = base + size;
1659 }
1660 }
1661
1662 alloc_bottom = PAGE_ALIGN((unsigned long)&_end + 0x4000);
1663
1664 /*
1665 * If prom_memory_limit is set we reduce the upper limits *except* for
1666 * alloc_top_high. This must be the real top of RAM so we can put
1667 * TCE's up there.
1668 */
1669
1670 alloc_top_high = ram_top;
1671
1672 if (prom_memory_limit) {
1673 if (prom_memory_limit <= alloc_bottom) {
1674 prom_printf("Ignoring mem=%lx <= alloc_bottom.\n",
1675 prom_memory_limit);
1676 prom_memory_limit = 0;
1677 } else if (prom_memory_limit >= ram_top) {
1678 prom_printf("Ignoring mem=%lx >= ram_top.\n",
1679 prom_memory_limit);
1680 prom_memory_limit = 0;
1681 } else {
1682 ram_top = prom_memory_limit;
1683 rmo_top = min(rmo_top, prom_memory_limit);
1684 }
1685 }
1686
1687 /*
1688 * Setup our top alloc point, that is top of RMO or top of
1689 * segment 0 when running non-LPAR.
1690 * Some RS64 machines have buggy firmware where claims up at
1691 * 1GB fail. Cap at 768MB as a workaround.
1692 * Since 768MB is plenty of room, and we need to cap to something
1693 * reasonable on 32-bit, cap at 768MB on all machines.
1694 */
1695 if (!rmo_top)
1696 rmo_top = ram_top;
1697 rmo_top = min(0x30000000ul, rmo_top);
1698 alloc_top = rmo_top;
1699 alloc_top_high = ram_top;
1700
1701 /*
1702 * Check if we have an initrd after the kernel but still inside
1703 * the RMO. If we do move our bottom point to after it.
1704 */
1705 if (prom_initrd_start &&
1706 prom_initrd_start < rmo_top &&
1707 prom_initrd_end > alloc_bottom)
1708 alloc_bottom = PAGE_ALIGN(prom_initrd_end);
1709
1710 prom_printf("memory layout at init:\n");
1711 prom_printf(" memory_limit : %lx (16 MB aligned)\n",
1712 prom_memory_limit);
1713 prom_printf(" alloc_bottom : %lx\n", alloc_bottom);
1714 prom_printf(" alloc_top : %lx\n", alloc_top);
1715 prom_printf(" alloc_top_hi : %lx\n", alloc_top_high);
1716 prom_printf(" rmo_top : %lx\n", rmo_top);
1717 prom_printf(" ram_top : %lx\n", ram_top);
1718}
1719
1720static void __init prom_close_stdin(void)
1721{
1722 __be32 val;
1723 ihandle stdin;
1724
1725 if (prom_getprop(prom.chosen, "stdin", &val, sizeof(val)) > 0) {
1726 stdin = be32_to_cpu(val);
1727 call_prom("close", 1, 0, stdin);
1728 }
1729}
1730
1731#ifdef CONFIG_PPC_SVM
1732static int prom_rtas_hcall(uint64_t args)
1733{
1734 register uint64_t arg1 asm("r3") = H_RTAS;
1735 register uint64_t arg2 asm("r4") = args;
1736
1737 asm volatile("sc 1\n" : "=r" (arg1) :
1738 "r" (arg1),
1739 "r" (arg2) :);
1740 return arg1;
1741}
1742
1743static struct rtas_args __prombss os_term_args;
1744
1745static void __init prom_rtas_os_term(char *str)
1746{
1747 phandle rtas_node;
1748 __be32 val;
1749 u32 token;
1750
1751 prom_debug("%s: start...\n", __func__);
1752 rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
1753 prom_debug("rtas_node: %x\n", rtas_node);
1754 if (!PHANDLE_VALID(rtas_node))
1755 return;
1756
1757 val = 0;
1758 prom_getprop(rtas_node, "ibm,os-term", &val, sizeof(val));
1759 token = be32_to_cpu(val);
1760 prom_debug("ibm,os-term: %x\n", token);
1761 if (token == 0)
1762 prom_panic("Could not get token for ibm,os-term\n");
1763 os_term_args.token = cpu_to_be32(token);
1764 prom_rtas_hcall((uint64_t)&os_term_args);
1765}
1766#endif /* CONFIG_PPC_SVM */
1767
1768/*
1769 * Allocate room for and instantiate RTAS
1770 */
1771static void __init prom_instantiate_rtas(void)
1772{
1773 phandle rtas_node;
1774 ihandle rtas_inst;
1775 u32 base, entry = 0;
1776 __be32 val;
1777 u32 size = 0;
1778
1779 prom_debug("prom_instantiate_rtas: start...\n");
1780
1781 rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
1782 prom_debug("rtas_node: %x\n", rtas_node);
1783 if (!PHANDLE_VALID(rtas_node))
1784 return;
1785
1786 val = 0;
1787 prom_getprop(rtas_node, "rtas-size", &val, sizeof(size));
1788 size = be32_to_cpu(val);
1789 if (size == 0)
1790 return;
1791
1792 base = alloc_down(size, PAGE_SIZE, 0);
1793 if (base == 0)
1794 prom_panic("Could not allocate memory for RTAS\n");
1795
1796 rtas_inst = call_prom("open", 1, 1, ADDR("/rtas"));
1797 if (!IHANDLE_VALID(rtas_inst)) {
1798 prom_printf("opening rtas package failed (%x)\n", rtas_inst);
1799 return;
1800 }
1801
1802 prom_printf("instantiating rtas at 0x%x...", base);
1803
1804 if (call_prom_ret("call-method", 3, 2, &entry,
1805 ADDR("instantiate-rtas"),
1806 rtas_inst, base) != 0
1807 || entry == 0) {
1808 prom_printf(" failed\n");
1809 return;
1810 }
1811 prom_printf(" done\n");
1812
1813 reserve_mem(base, size);
1814
1815 val = cpu_to_be32(base);
1816 prom_setprop(rtas_node, "/rtas", "linux,rtas-base",
1817 &val, sizeof(val));
1818 val = cpu_to_be32(entry);
1819 prom_setprop(rtas_node, "/rtas", "linux,rtas-entry",
1820 &val, sizeof(val));
1821
1822 /* Check if it supports "query-cpu-stopped-state" */
1823 if (prom_getprop(rtas_node, "query-cpu-stopped-state",
1824 &val, sizeof(val)) != PROM_ERROR)
1825 rtas_has_query_cpu_stopped = true;
1826
1827 prom_debug("rtas base = 0x%x\n", base);
1828 prom_debug("rtas entry = 0x%x\n", entry);
1829 prom_debug("rtas size = 0x%x\n", size);
1830
1831 prom_debug("prom_instantiate_rtas: end...\n");
1832}
1833
1834#ifdef CONFIG_PPC64
1835/*
1836 * Allocate room for and instantiate Stored Measurement Log (SML)
1837 */
1838static void __init prom_instantiate_sml(void)
1839{
1840 phandle ibmvtpm_node;
1841 ihandle ibmvtpm_inst;
1842 u32 entry = 0, size = 0, succ = 0;
1843 u64 base;
1844 __be32 val;
1845
1846 prom_debug("prom_instantiate_sml: start...\n");
1847
1848 ibmvtpm_node = call_prom("finddevice", 1, 1, ADDR("/vdevice/vtpm"));
1849 prom_debug("ibmvtpm_node: %x\n", ibmvtpm_node);
1850 if (!PHANDLE_VALID(ibmvtpm_node))
1851 return;
1852
1853 ibmvtpm_inst = call_prom("open", 1, 1, ADDR("/vdevice/vtpm"));
1854 if (!IHANDLE_VALID(ibmvtpm_inst)) {
1855 prom_printf("opening vtpm package failed (%x)\n", ibmvtpm_inst);
1856 return;
1857 }
1858
1859 if (prom_getprop(ibmvtpm_node, "ibm,sml-efi-reformat-supported",
1860 &val, sizeof(val)) != PROM_ERROR) {
1861 if (call_prom_ret("call-method", 2, 2, &succ,
1862 ADDR("reformat-sml-to-efi-alignment"),
1863 ibmvtpm_inst) != 0 || succ == 0) {
1864 prom_printf("Reformat SML to EFI alignment failed\n");
1865 return;
1866 }
1867
1868 if (call_prom_ret("call-method", 2, 2, &size,
1869 ADDR("sml-get-allocated-size"),
1870 ibmvtpm_inst) != 0 || size == 0) {
1871 prom_printf("SML get allocated size failed\n");
1872 return;
1873 }
1874 } else {
1875 if (call_prom_ret("call-method", 2, 2, &size,
1876 ADDR("sml-get-handover-size"),
1877 ibmvtpm_inst) != 0 || size == 0) {
1878 prom_printf("SML get handover size failed\n");
1879 return;
1880 }
1881 }
1882
1883 base = alloc_down(size, PAGE_SIZE, 0);
1884 if (base == 0)
1885 prom_panic("Could not allocate memory for sml\n");
1886
1887 prom_printf("instantiating sml at 0x%llx...", base);
1888
1889 memset((void *)base, 0, size);
1890
1891 if (call_prom_ret("call-method", 4, 2, &entry,
1892 ADDR("sml-handover"),
1893 ibmvtpm_inst, size, base) != 0 || entry == 0) {
1894 prom_printf("SML handover failed\n");
1895 return;
1896 }
1897 prom_printf(" done\n");
1898
1899 reserve_mem(base, size);
1900
1901 prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-base",
1902 &base, sizeof(base));
1903 prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-size",
1904 &size, sizeof(size));
1905
1906 prom_debug("sml base = 0x%llx\n", base);
1907 prom_debug("sml size = 0x%x\n", size);
1908
1909 prom_debug("prom_instantiate_sml: end...\n");
1910}
1911
1912/*
1913 * Allocate room for and initialize TCE tables
1914 */
1915#ifdef __BIG_ENDIAN__
1916static void __init prom_initialize_tce_table(void)
1917{
1918 phandle node;
1919 ihandle phb_node;
1920 char compatible[64], type[64], model[64];
1921 char *path = prom_scratch;
1922 u64 base, align;
1923 u32 minalign, minsize;
1924 u64 tce_entry, *tce_entryp;
1925 u64 local_alloc_top, local_alloc_bottom;
1926 u64 i;
1927
1928 if (prom_iommu_off)
1929 return;
1930
1931 prom_debug("starting prom_initialize_tce_table\n");
1932
1933 /* Cache current top of allocs so we reserve a single block */
1934 local_alloc_top = alloc_top_high;
1935 local_alloc_bottom = local_alloc_top;
1936
1937 /* Search all nodes looking for PHBs. */
1938 for (node = 0; prom_next_node(&node); ) {
1939 compatible[0] = 0;
1940 type[0] = 0;
1941 model[0] = 0;
1942 prom_getprop(node, "compatible",
1943 compatible, sizeof(compatible));
1944 prom_getprop(node, "device_type", type, sizeof(type));
1945 prom_getprop(node, "model", model, sizeof(model));
1946
1947 if ((type[0] == 0) || (prom_strstr(type, "pci") == NULL))
1948 continue;
1949
1950 /* Keep the old logic intact to avoid regression. */
1951 if (compatible[0] != 0) {
1952 if ((prom_strstr(compatible, "python") == NULL) &&
1953 (prom_strstr(compatible, "Speedwagon") == NULL) &&
1954 (prom_strstr(compatible, "Winnipeg") == NULL))
1955 continue;
1956 } else if (model[0] != 0) {
1957 if ((prom_strstr(model, "ython") == NULL) &&
1958 (prom_strstr(model, "peedwagon") == NULL) &&
1959 (prom_strstr(model, "innipeg") == NULL))
1960 continue;
1961 }
1962
1963 if (prom_getprop(node, "tce-table-minalign", &minalign,
1964 sizeof(minalign)) == PROM_ERROR)
1965 minalign = 0;
1966 if (prom_getprop(node, "tce-table-minsize", &minsize,
1967 sizeof(minsize)) == PROM_ERROR)
1968 minsize = 4UL << 20;
1969
1970 /*
1971 * Even though we read what OF wants, we just set the table
1972 * size to 4 MB. This is enough to map 2GB of PCI DMA space.
1973 * By doing this, we avoid the pitfalls of trying to DMA to
1974 * MMIO space and the DMA alias hole.
1975 */
1976 minsize = 4UL << 20;
1977
1978 /* Align to the greater of the align or size */
1979 align = max(minalign, minsize);
1980 base = alloc_down(minsize, align, 1);
1981 if (base == 0)
1982 prom_panic("ERROR, cannot find space for TCE table.\n");
1983 if (base < local_alloc_bottom)
1984 local_alloc_bottom = base;
1985
1986 /* It seems OF doesn't null-terminate the path :-( */
1987 memset(path, 0, sizeof(prom_scratch));
1988 /* Call OF to setup the TCE hardware */
1989 if (call_prom("package-to-path", 3, 1, node,
1990 path, sizeof(prom_scratch) - 1) == PROM_ERROR) {
1991 prom_printf("package-to-path failed\n");
1992 }
1993
1994 /* Save away the TCE table attributes for later use. */
1995 prom_setprop(node, path, "linux,tce-base", &base, sizeof(base));
1996 prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize));
1997
1998 prom_debug("TCE table: %s\n", path);
1999 prom_debug("\tnode = 0x%x\n", node);
2000 prom_debug("\tbase = 0x%llx\n", base);
2001 prom_debug("\tsize = 0x%x\n", minsize);
2002
2003 /* Initialize the table to have a one-to-one mapping
2004 * over the allocated size.
2005 */
2006 tce_entryp = (u64 *)base;
2007 for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) {
2008 tce_entry = (i << PAGE_SHIFT);
2009 tce_entry |= 0x3;
2010 *tce_entryp = tce_entry;
2011 }
2012
2013 prom_printf("opening PHB %s", path);
2014 phb_node = call_prom("open", 1, 1, path);
2015 if (phb_node == 0)
2016 prom_printf("... failed\n");
2017 else
2018 prom_printf("... done\n");
2019
2020 call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"),
2021 phb_node, -1, minsize,
2022 (u32) base, (u32) (base >> 32));
2023 call_prom("close", 1, 0, phb_node);
2024 }
2025
2026 reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom);
2027
2028 /* These are only really needed if there is a memory limit in
2029 * effect, but we don't know so export them always. */
2030 prom_tce_alloc_start = local_alloc_bottom;
2031 prom_tce_alloc_end = local_alloc_top;
2032
2033 /* Flag the first invalid entry */
2034 prom_debug("ending prom_initialize_tce_table\n");
2035}
2036#endif /* __BIG_ENDIAN__ */
2037#endif /* CONFIG_PPC64 */
2038
2039/*
2040 * With CHRP SMP we need to use the OF to start the other processors.
2041 * We can't wait until smp_boot_cpus (the OF is trashed by then)
2042 * so we have to put the processors into a holding pattern controlled
2043 * by the kernel (not OF) before we destroy the OF.
2044 *
2045 * This uses a chunk of low memory, puts some holding pattern
2046 * code there and sends the other processors off to there until
2047 * smp_boot_cpus tells them to do something. The holding pattern
2048 * checks that address until its cpu # is there, when it is that
2049 * cpu jumps to __secondary_start(). smp_boot_cpus() takes care
2050 * of setting those values.
2051 *
2052 * We also use physical address 0x4 here to tell when a cpu
2053 * is in its holding pattern code.
2054 *
2055 * -- Cort
2056 */
2057/*
2058 * We want to reference the copy of __secondary_hold_* in the
2059 * 0 - 0x100 address range
2060 */
2061#define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff)
2062
2063static void __init prom_hold_cpus(void)
2064{
2065 unsigned long i;
2066 phandle node;
2067 char type[64];
2068 unsigned long *spinloop
2069 = (void *) LOW_ADDR(__secondary_hold_spinloop);
2070 unsigned long *acknowledge
2071 = (void *) LOW_ADDR(__secondary_hold_acknowledge);
2072 unsigned long secondary_hold = LOW_ADDR(__secondary_hold);
2073
2074 /*
2075 * On pseries, if RTAS supports "query-cpu-stopped-state",
2076 * we skip this stage, the CPUs will be started by the
2077 * kernel using RTAS.
2078 */
2079 if ((of_platform == PLATFORM_PSERIES ||
2080 of_platform == PLATFORM_PSERIES_LPAR) &&
2081 rtas_has_query_cpu_stopped) {
2082 prom_printf("prom_hold_cpus: skipped\n");
2083 return;
2084 }
2085
2086 prom_debug("prom_hold_cpus: start...\n");
2087 prom_debug(" 1) spinloop = 0x%lx\n", (unsigned long)spinloop);
2088 prom_debug(" 1) *spinloop = 0x%lx\n", *spinloop);
2089 prom_debug(" 1) acknowledge = 0x%lx\n",
2090 (unsigned long)acknowledge);
2091 prom_debug(" 1) *acknowledge = 0x%lx\n", *acknowledge);
2092 prom_debug(" 1) secondary_hold = 0x%lx\n", secondary_hold);
2093
2094 /* Set the common spinloop variable, so all of the secondary cpus
2095 * will block when they are awakened from their OF spinloop.
2096 * This must occur for both SMP and non SMP kernels, since OF will
2097 * be trashed when we move the kernel.
2098 */
2099 *spinloop = 0;
2100
2101 /* look for cpus */
2102 for (node = 0; prom_next_node(&node); ) {
2103 unsigned int cpu_no;
2104 __be32 reg;
2105
2106 type[0] = 0;
2107 prom_getprop(node, "device_type", type, sizeof(type));
2108 if (prom_strcmp(type, "cpu") != 0)
2109 continue;
2110
2111 /* Skip non-configured cpus. */
2112 if (prom_getprop(node, "status", type, sizeof(type)) > 0)
2113 if (prom_strcmp(type, "okay") != 0)
2114 continue;
2115
2116 reg = cpu_to_be32(-1); /* make sparse happy */
2117 prom_getprop(node, "reg", ®, sizeof(reg));
2118 cpu_no = be32_to_cpu(reg);
2119
2120 prom_debug("cpu hw idx = %u\n", cpu_no);
2121
2122 /* Init the acknowledge var which will be reset by
2123 * the secondary cpu when it awakens from its OF
2124 * spinloop.
2125 */
2126 *acknowledge = (unsigned long)-1;
2127
2128 if (cpu_no != prom.cpu) {
2129 /* Primary Thread of non-boot cpu or any thread */
2130 prom_printf("starting cpu hw idx %u... ", cpu_no);
2131 call_prom("start-cpu", 3, 0, node,
2132 secondary_hold, cpu_no);
2133
2134 for (i = 0; (i < 100000000) &&
2135 (*acknowledge == ((unsigned long)-1)); i++ )
2136 mb();
2137
2138 if (*acknowledge == cpu_no)
2139 prom_printf("done\n");
2140 else
2141 prom_printf("failed: %lx\n", *acknowledge);
2142 }
2143#ifdef CONFIG_SMP
2144 else
2145 prom_printf("boot cpu hw idx %u\n", cpu_no);
2146#endif /* CONFIG_SMP */
2147 }
2148
2149 prom_debug("prom_hold_cpus: end...\n");
2150}
2151
2152
2153static void __init prom_init_client_services(unsigned long pp)
2154{
2155 /* Get a handle to the prom entry point before anything else */
2156 prom_entry = pp;
2157
2158 /* get a handle for the stdout device */
2159 prom.chosen = call_prom("finddevice", 1, 1, ADDR("/chosen"));
2160 if (!PHANDLE_VALID(prom.chosen))
2161 prom_panic("cannot find chosen"); /* msg won't be printed :( */
2162
2163 /* get device tree root */
2164 prom.root = call_prom("finddevice", 1, 1, ADDR("/"));
2165 if (!PHANDLE_VALID(prom.root))
2166 prom_panic("cannot find device tree root"); /* msg won't be printed :( */
2167
2168 prom.mmumap = 0;
2169}
2170
2171#ifdef CONFIG_PPC32
2172/*
2173 * For really old powermacs, we need to map things we claim.
2174 * For that, we need the ihandle of the mmu.
2175 * Also, on the longtrail, we need to work around other bugs.
2176 */
2177static void __init prom_find_mmu(void)
2178{
2179 phandle oprom;
2180 char version[64];
2181
2182 oprom = call_prom("finddevice", 1, 1, ADDR("/openprom"));
2183 if (!PHANDLE_VALID(oprom))
2184 return;
2185 if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0)
2186 return;
2187 version[sizeof(version) - 1] = 0;
2188 /* XXX might need to add other versions here */
2189 if (prom_strcmp(version, "Open Firmware, 1.0.5") == 0)
2190 of_workarounds = OF_WA_CLAIM;
2191 else if (prom_strncmp(version, "FirmWorks,3.", 12) == 0) {
2192 of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL;
2193 call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim");
2194 } else
2195 return;
2196 prom.memory = call_prom("open", 1, 1, ADDR("/memory"));
2197 prom_getprop(prom.chosen, "mmu", &prom.mmumap,
2198 sizeof(prom.mmumap));
2199 prom.mmumap = be32_to_cpu(prom.mmumap);
2200 if (!IHANDLE_VALID(prom.memory) || !IHANDLE_VALID(prom.mmumap))
2201 of_workarounds &= ~OF_WA_CLAIM; /* hmmm */
2202}
2203#else
2204#define prom_find_mmu()
2205#endif
2206
2207static void __init prom_init_stdout(void)
2208{
2209 char *path = of_stdout_device;
2210 char type[16];
2211 phandle stdout_node;
2212 __be32 val;
2213
2214 if (prom_getprop(prom.chosen, "stdout", &val, sizeof(val)) <= 0)
2215 prom_panic("cannot find stdout");
2216
2217 prom.stdout = be32_to_cpu(val);
2218
2219 /* Get the full OF pathname of the stdout device */
2220 memset(path, 0, 256);
2221 call_prom("instance-to-path", 3, 1, prom.stdout, path, 255);
2222 prom_printf("OF stdout device is: %s\n", of_stdout_device);
2223 prom_setprop(prom.chosen, "/chosen", "linux,stdout-path",
2224 path, prom_strlen(path) + 1);
2225
2226 /* instance-to-package fails on PA-Semi */
2227 stdout_node = call_prom("instance-to-package", 1, 1, prom.stdout);
2228 if (stdout_node != PROM_ERROR) {
2229 val = cpu_to_be32(stdout_node);
2230
2231 /* If it's a display, note it */
2232 memset(type, 0, sizeof(type));
2233 prom_getprop(stdout_node, "device_type", type, sizeof(type));
2234 if (prom_strcmp(type, "display") == 0)
2235 prom_setprop(stdout_node, path, "linux,boot-display", NULL, 0);
2236 }
2237}
2238
2239static int __init prom_find_machine_type(void)
2240{
2241 char compat[256];
2242 int len, i = 0;
2243#ifdef CONFIG_PPC64
2244 phandle rtas;
2245 int x;
2246#endif
2247
2248 /* Look for a PowerMac or a Cell */
2249 len = prom_getprop(prom.root, "compatible",
2250 compat, sizeof(compat)-1);
2251 if (len > 0) {
2252 compat[len] = 0;
2253 while (i < len) {
2254 char *p = &compat[i];
2255 int sl = prom_strlen(p);
2256 if (sl == 0)
2257 break;
2258 if (prom_strstr(p, "Power Macintosh") ||
2259 prom_strstr(p, "MacRISC"))
2260 return PLATFORM_POWERMAC;
2261#ifdef CONFIG_PPC64
2262 /* We must make sure we don't detect the IBM Cell
2263 * blades as pSeries due to some firmware issues,
2264 * so we do it here.
2265 */
2266 if (prom_strstr(p, "IBM,CBEA") ||
2267 prom_strstr(p, "IBM,CPBW-1.0"))
2268 return PLATFORM_GENERIC;
2269#endif /* CONFIG_PPC64 */
2270 i += sl + 1;
2271 }
2272 }
2273#ifdef CONFIG_PPC64
2274 /* Try to figure out if it's an IBM pSeries or any other
2275 * PAPR compliant platform. We assume it is if :
2276 * - /device_type is "chrp" (please, do NOT use that for future
2277 * non-IBM designs !
2278 * - it has /rtas
2279 */
2280 len = prom_getprop(prom.root, "device_type",
2281 compat, sizeof(compat)-1);
2282 if (len <= 0)
2283 return PLATFORM_GENERIC;
2284 if (prom_strcmp(compat, "chrp"))
2285 return PLATFORM_GENERIC;
2286
2287 /* Default to pSeries. We need to know if we are running LPAR */
2288 rtas = call_prom("finddevice", 1, 1, ADDR("/rtas"));
2289 if (!PHANDLE_VALID(rtas))
2290 return PLATFORM_GENERIC;
2291 x = prom_getproplen(rtas, "ibm,hypertas-functions");
2292 if (x != PROM_ERROR) {
2293 prom_debug("Hypertas detected, assuming LPAR !\n");
2294 return PLATFORM_PSERIES_LPAR;
2295 }
2296 return PLATFORM_PSERIES;
2297#else
2298 return PLATFORM_GENERIC;
2299#endif
2300}
2301
2302static int __init prom_set_color(ihandle ih, int i, int r, int g, int b)
2303{
2304 return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r);
2305}
2306
2307/*
2308 * If we have a display that we don't know how to drive,
2309 * we will want to try to execute OF's open method for it
2310 * later. However, OF will probably fall over if we do that
2311 * we've taken over the MMU.
2312 * So we check whether we will need to open the display,
2313 * and if so, open it now.
2314 */
2315static void __init prom_check_displays(void)
2316{
2317 char type[16], *path;
2318 phandle node;
2319 ihandle ih;
2320 int i;
2321
2322 static const unsigned char default_colors[] __initconst = {
2323 0x00, 0x00, 0x00,
2324 0x00, 0x00, 0xaa,
2325 0x00, 0xaa, 0x00,
2326 0x00, 0xaa, 0xaa,
2327 0xaa, 0x00, 0x00,
2328 0xaa, 0x00, 0xaa,
2329 0xaa, 0xaa, 0x00,
2330 0xaa, 0xaa, 0xaa,
2331 0x55, 0x55, 0x55,
2332 0x55, 0x55, 0xff,
2333 0x55, 0xff, 0x55,
2334 0x55, 0xff, 0xff,
2335 0xff, 0x55, 0x55,
2336 0xff, 0x55, 0xff,
2337 0xff, 0xff, 0x55,
2338 0xff, 0xff, 0xff
2339 };
2340 const unsigned char *clut;
2341
2342 prom_debug("Looking for displays\n");
2343 for (node = 0; prom_next_node(&node); ) {
2344 memset(type, 0, sizeof(type));
2345 prom_getprop(node, "device_type", type, sizeof(type));
2346 if (prom_strcmp(type, "display") != 0)
2347 continue;
2348
2349 /* It seems OF doesn't null-terminate the path :-( */
2350 path = prom_scratch;
2351 memset(path, 0, sizeof(prom_scratch));
2352
2353 /*
2354 * leave some room at the end of the path for appending extra
2355 * arguments
2356 */
2357 if (call_prom("package-to-path", 3, 1, node, path,
2358 sizeof(prom_scratch) - 10) == PROM_ERROR)
2359 continue;
2360 prom_printf("found display : %s, opening... ", path);
2361
2362 ih = call_prom("open", 1, 1, path);
2363 if (ih == 0) {
2364 prom_printf("failed\n");
2365 continue;
2366 }
2367
2368 /* Success */
2369 prom_printf("done\n");
2370 prom_setprop(node, path, "linux,opened", NULL, 0);
2371
2372 /* Setup a usable color table when the appropriate
2373 * method is available. Should update this to set-colors */
2374 clut = default_colors;
2375 for (i = 0; i < 16; i++, clut += 3)
2376 if (prom_set_color(ih, i, clut[0], clut[1],
2377 clut[2]) != 0)
2378 break;
2379
2380#ifdef CONFIG_LOGO_LINUX_CLUT224
2381 clut = PTRRELOC(logo_linux_clut224.clut);
2382 for (i = 0; i < logo_linux_clut224.clutsize; i++, clut += 3)
2383 if (prom_set_color(ih, i + 32, clut[0], clut[1],
2384 clut[2]) != 0)
2385 break;
2386#endif /* CONFIG_LOGO_LINUX_CLUT224 */
2387
2388#ifdef CONFIG_PPC_EARLY_DEBUG_BOOTX
2389 if (prom_getprop(node, "linux,boot-display", NULL, 0) !=
2390 PROM_ERROR) {
2391 u32 width, height, pitch, addr;
2392
2393 prom_printf("Setting btext !\n");
2394 prom_getprop(node, "width", &width, 4);
2395 prom_getprop(node, "height", &height, 4);
2396 prom_getprop(node, "linebytes", &pitch, 4);
2397 prom_getprop(node, "address", &addr, 4);
2398 prom_printf("W=%d H=%d LB=%d addr=0x%x\n",
2399 width, height, pitch, addr);
2400 btext_setup_display(width, height, 8, pitch, addr);
2401 btext_prepare_BAT();
2402 }
2403#endif /* CONFIG_PPC_EARLY_DEBUG_BOOTX */
2404 }
2405}
2406
2407
2408/* Return (relocated) pointer to this much memory: moves initrd if reqd. */
2409static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end,
2410 unsigned long needed, unsigned long align)
2411{
2412 void *ret;
2413
2414 *mem_start = _ALIGN(*mem_start, align);
2415 while ((*mem_start + needed) > *mem_end) {
2416 unsigned long room, chunk;
2417
2418 prom_debug("Chunk exhausted, claiming more at %lx...\n",
2419 alloc_bottom);
2420 room = alloc_top - alloc_bottom;
2421 if (room > DEVTREE_CHUNK_SIZE)
2422 room = DEVTREE_CHUNK_SIZE;
2423 if (room < PAGE_SIZE)
2424 prom_panic("No memory for flatten_device_tree "
2425 "(no room)\n");
2426 chunk = alloc_up(room, 0);
2427 if (chunk == 0)
2428 prom_panic("No memory for flatten_device_tree "
2429 "(claim failed)\n");
2430 *mem_end = chunk + room;
2431 }
2432
2433 ret = (void *)*mem_start;
2434 *mem_start += needed;
2435
2436 return ret;
2437}
2438
2439#define dt_push_token(token, mem_start, mem_end) do { \
2440 void *room = make_room(mem_start, mem_end, 4, 4); \
2441 *(__be32 *)room = cpu_to_be32(token); \
2442 } while(0)
2443
2444static unsigned long __init dt_find_string(char *str)
2445{
2446 char *s, *os;
2447
2448 s = os = (char *)dt_string_start;
2449 s += 4;
2450 while (s < (char *)dt_string_end) {
2451 if (prom_strcmp(s, str) == 0)
2452 return s - os;
2453 s += prom_strlen(s) + 1;
2454 }
2455 return 0;
2456}
2457
2458/*
2459 * The Open Firmware 1275 specification states properties must be 31 bytes or
2460 * less, however not all firmwares obey this. Make it 64 bytes to be safe.
2461 */
2462#define MAX_PROPERTY_NAME 64
2463
2464static void __init scan_dt_build_strings(phandle node,
2465 unsigned long *mem_start,
2466 unsigned long *mem_end)
2467{
2468 char *prev_name, *namep, *sstart;
2469 unsigned long soff;
2470 phandle child;
2471
2472 sstart = (char *)dt_string_start;
2473
2474 /* get and store all property names */
2475 prev_name = "";
2476 for (;;) {
2477 /* 64 is max len of name including nul. */
2478 namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1);
2479 if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) {
2480 /* No more nodes: unwind alloc */
2481 *mem_start = (unsigned long)namep;
2482 break;
2483 }
2484
2485 /* skip "name" */
2486 if (prom_strcmp(namep, "name") == 0) {
2487 *mem_start = (unsigned long)namep;
2488 prev_name = "name";
2489 continue;
2490 }
2491 /* get/create string entry */
2492 soff = dt_find_string(namep);
2493 if (soff != 0) {
2494 *mem_start = (unsigned long)namep;
2495 namep = sstart + soff;
2496 } else {
2497 /* Trim off some if we can */
2498 *mem_start = (unsigned long)namep + prom_strlen(namep) + 1;
2499 dt_string_end = *mem_start;
2500 }
2501 prev_name = namep;
2502 }
2503
2504 /* do all our children */
2505 child = call_prom("child", 1, 1, node);
2506 while (child != 0) {
2507 scan_dt_build_strings(child, mem_start, mem_end);
2508 child = call_prom("peer", 1, 1, child);
2509 }
2510}
2511
2512static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
2513 unsigned long *mem_end)
2514{
2515 phandle child;
2516 char *namep, *prev_name, *sstart, *p, *ep, *lp, *path;
2517 unsigned long soff;
2518 unsigned char *valp;
2519 static char pname[MAX_PROPERTY_NAME] __prombss;
2520 int l, room, has_phandle = 0;
2521
2522 dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end);
2523
2524 /* get the node's full name */
2525 namep = (char *)*mem_start;
2526 room = *mem_end - *mem_start;
2527 if (room > 255)
2528 room = 255;
2529 l = call_prom("package-to-path", 3, 1, node, namep, room);
2530 if (l >= 0) {
2531 /* Didn't fit? Get more room. */
2532 if (l >= room) {
2533 if (l >= *mem_end - *mem_start)
2534 namep = make_room(mem_start, mem_end, l+1, 1);
2535 call_prom("package-to-path", 3, 1, node, namep, l);
2536 }
2537 namep[l] = '\0';
2538
2539 /* Fixup an Apple bug where they have bogus \0 chars in the
2540 * middle of the path in some properties, and extract
2541 * the unit name (everything after the last '/').
2542 */
2543 for (lp = p = namep, ep = namep + l; p < ep; p++) {
2544 if (*p == '/')
2545 lp = namep;
2546 else if (*p != 0)
2547 *lp++ = *p;
2548 }
2549 *lp = 0;
2550 *mem_start = _ALIGN((unsigned long)lp + 1, 4);
2551 }
2552
2553 /* get it again for debugging */
2554 path = prom_scratch;
2555 memset(path, 0, sizeof(prom_scratch));
2556 call_prom("package-to-path", 3, 1, node, path, sizeof(prom_scratch) - 1);
2557
2558 /* get and store all properties */
2559 prev_name = "";
2560 sstart = (char *)dt_string_start;
2561 for (;;) {
2562 if (call_prom("nextprop", 3, 1, node, prev_name,
2563 pname) != 1)
2564 break;
2565
2566 /* skip "name" */
2567 if (prom_strcmp(pname, "name") == 0) {
2568 prev_name = "name";
2569 continue;
2570 }
2571
2572 /* find string offset */
2573 soff = dt_find_string(pname);
2574 if (soff == 0) {
2575 prom_printf("WARNING: Can't find string index for"
2576 " <%s>, node %s\n", pname, path);
2577 break;
2578 }
2579 prev_name = sstart + soff;
2580
2581 /* get length */
2582 l = call_prom("getproplen", 2, 1, node, pname);
2583
2584 /* sanity checks */
2585 if (l == PROM_ERROR)
2586 continue;
2587
2588 /* push property head */
2589 dt_push_token(OF_DT_PROP, mem_start, mem_end);
2590 dt_push_token(l, mem_start, mem_end);
2591 dt_push_token(soff, mem_start, mem_end);
2592
2593 /* push property content */
2594 valp = make_room(mem_start, mem_end, l, 4);
2595 call_prom("getprop", 4, 1, node, pname, valp, l);
2596 *mem_start = _ALIGN(*mem_start, 4);
2597
2598 if (!prom_strcmp(pname, "phandle"))
2599 has_phandle = 1;
2600 }
2601
2602 /* Add a "phandle" property if none already exist */
2603 if (!has_phandle) {
2604 soff = dt_find_string("phandle");
2605 if (soff == 0)
2606 prom_printf("WARNING: Can't find string index for <phandle> node %s\n", path);
2607 else {
2608 dt_push_token(OF_DT_PROP, mem_start, mem_end);
2609 dt_push_token(4, mem_start, mem_end);
2610 dt_push_token(soff, mem_start, mem_end);
2611 valp = make_room(mem_start, mem_end, 4, 4);
2612 *(__be32 *)valp = cpu_to_be32(node);
2613 }
2614 }
2615
2616 /* do all our children */
2617 child = call_prom("child", 1, 1, node);
2618 while (child != 0) {
2619 scan_dt_build_struct(child, mem_start, mem_end);
2620 child = call_prom("peer", 1, 1, child);
2621 }
2622
2623 dt_push_token(OF_DT_END_NODE, mem_start, mem_end);
2624}
2625
2626static void __init flatten_device_tree(void)
2627{
2628 phandle root;
2629 unsigned long mem_start, mem_end, room;
2630 struct boot_param_header *hdr;
2631 char *namep;
2632 u64 *rsvmap;
2633
2634 /*
2635 * Check how much room we have between alloc top & bottom (+/- a
2636 * few pages), crop to 1MB, as this is our "chunk" size
2637 */
2638 room = alloc_top - alloc_bottom - 0x4000;
2639 if (room > DEVTREE_CHUNK_SIZE)
2640 room = DEVTREE_CHUNK_SIZE;
2641 prom_debug("starting device tree allocs at %lx\n", alloc_bottom);
2642
2643 /* Now try to claim that */
2644 mem_start = (unsigned long)alloc_up(room, PAGE_SIZE);
2645 if (mem_start == 0)
2646 prom_panic("Can't allocate initial device-tree chunk\n");
2647 mem_end = mem_start + room;
2648
2649 /* Get root of tree */
2650 root = call_prom("peer", 1, 1, (phandle)0);
2651 if (root == (phandle)0)
2652 prom_panic ("couldn't get device tree root\n");
2653
2654 /* Build header and make room for mem rsv map */
2655 mem_start = _ALIGN(mem_start, 4);
2656 hdr = make_room(&mem_start, &mem_end,
2657 sizeof(struct boot_param_header), 4);
2658 dt_header_start = (unsigned long)hdr;
2659 rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8);
2660
2661 /* Start of strings */
2662 mem_start = PAGE_ALIGN(mem_start);
2663 dt_string_start = mem_start;
2664 mem_start += 4; /* hole */
2665
2666 /* Add "phandle" in there, we'll need it */
2667 namep = make_room(&mem_start, &mem_end, 16, 1);
2668 prom_strcpy(namep, "phandle");
2669 mem_start = (unsigned long)namep + prom_strlen(namep) + 1;
2670
2671 /* Build string array */
2672 prom_printf("Building dt strings...\n");
2673 scan_dt_build_strings(root, &mem_start, &mem_end);
2674 dt_string_end = mem_start;
2675
2676 /* Build structure */
2677 mem_start = PAGE_ALIGN(mem_start);
2678 dt_struct_start = mem_start;
2679 prom_printf("Building dt structure...\n");
2680 scan_dt_build_struct(root, &mem_start, &mem_end);
2681 dt_push_token(OF_DT_END, &mem_start, &mem_end);
2682 dt_struct_end = PAGE_ALIGN(mem_start);
2683
2684 /* Finish header */
2685 hdr->boot_cpuid_phys = cpu_to_be32(prom.cpu);
2686 hdr->magic = cpu_to_be32(OF_DT_HEADER);
2687 hdr->totalsize = cpu_to_be32(dt_struct_end - dt_header_start);
2688 hdr->off_dt_struct = cpu_to_be32(dt_struct_start - dt_header_start);
2689 hdr->off_dt_strings = cpu_to_be32(dt_string_start - dt_header_start);
2690 hdr->dt_strings_size = cpu_to_be32(dt_string_end - dt_string_start);
2691 hdr->off_mem_rsvmap = cpu_to_be32(((unsigned long)rsvmap) - dt_header_start);
2692 hdr->version = cpu_to_be32(OF_DT_VERSION);
2693 /* Version 16 is not backward compatible */
2694 hdr->last_comp_version = cpu_to_be32(0x10);
2695
2696 /* Copy the reserve map in */
2697 memcpy(rsvmap, mem_reserve_map, sizeof(mem_reserve_map));
2698
2699#ifdef DEBUG_PROM
2700 {
2701 int i;
2702 prom_printf("reserved memory map:\n");
2703 for (i = 0; i < mem_reserve_cnt; i++)
2704 prom_printf(" %llx - %llx\n",
2705 be64_to_cpu(mem_reserve_map[i].base),
2706 be64_to_cpu(mem_reserve_map[i].size));
2707 }
2708#endif
2709 /* Bump mem_reserve_cnt to cause further reservations to fail
2710 * since it's too late.
2711 */
2712 mem_reserve_cnt = MEM_RESERVE_MAP_SIZE;
2713
2714 prom_printf("Device tree strings 0x%lx -> 0x%lx\n",
2715 dt_string_start, dt_string_end);
2716 prom_printf("Device tree struct 0x%lx -> 0x%lx\n",
2717 dt_struct_start, dt_struct_end);
2718}
2719
2720#ifdef CONFIG_PPC_MAPLE
2721/* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property.
2722 * The values are bad, and it doesn't even have the right number of cells. */
2723static void __init fixup_device_tree_maple(void)
2724{
2725 phandle isa;
2726 u32 rloc = 0x01002000; /* IO space; PCI device = 4 */
2727 u32 isa_ranges[6];
2728 char *name;
2729
2730 name = "/ht@0/isa@4";
2731 isa = call_prom("finddevice", 1, 1, ADDR(name));
2732 if (!PHANDLE_VALID(isa)) {
2733 name = "/ht@0/isa@6";
2734 isa = call_prom("finddevice", 1, 1, ADDR(name));
2735 rloc = 0x01003000; /* IO space; PCI device = 6 */
2736 }
2737 if (!PHANDLE_VALID(isa))
2738 return;
2739
2740 if (prom_getproplen(isa, "ranges") != 12)
2741 return;
2742 if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges))
2743 == PROM_ERROR)
2744 return;
2745
2746 if (isa_ranges[0] != 0x1 ||
2747 isa_ranges[1] != 0xf4000000 ||
2748 isa_ranges[2] != 0x00010000)
2749 return;
2750
2751 prom_printf("Fixing up bogus ISA range on Maple/Apache...\n");
2752
2753 isa_ranges[0] = 0x1;
2754 isa_ranges[1] = 0x0;
2755 isa_ranges[2] = rloc;
2756 isa_ranges[3] = 0x0;
2757 isa_ranges[4] = 0x0;
2758 isa_ranges[5] = 0x00010000;
2759 prom_setprop(isa, name, "ranges",
2760 isa_ranges, sizeof(isa_ranges));
2761}
2762
2763#define CPC925_MC_START 0xf8000000
2764#define CPC925_MC_LENGTH 0x1000000
2765/* The values for memory-controller don't have right number of cells */
2766static void __init fixup_device_tree_maple_memory_controller(void)
2767{
2768 phandle mc;
2769 u32 mc_reg[4];
2770 char *name = "/hostbridge@f8000000";
2771 u32 ac, sc;
2772
2773 mc = call_prom("finddevice", 1, 1, ADDR(name));
2774 if (!PHANDLE_VALID(mc))
2775 return;
2776
2777 if (prom_getproplen(mc, "reg") != 8)
2778 return;
2779
2780 prom_getprop(prom.root, "#address-cells", &ac, sizeof(ac));
2781 prom_getprop(prom.root, "#size-cells", &sc, sizeof(sc));
2782 if ((ac != 2) || (sc != 2))
2783 return;
2784
2785 if (prom_getprop(mc, "reg", mc_reg, sizeof(mc_reg)) == PROM_ERROR)
2786 return;
2787
2788 if (mc_reg[0] != CPC925_MC_START || mc_reg[1] != CPC925_MC_LENGTH)
2789 return;
2790
2791 prom_printf("Fixing up bogus hostbridge on Maple...\n");
2792
2793 mc_reg[0] = 0x0;
2794 mc_reg[1] = CPC925_MC_START;
2795 mc_reg[2] = 0x0;
2796 mc_reg[3] = CPC925_MC_LENGTH;
2797 prom_setprop(mc, name, "reg", mc_reg, sizeof(mc_reg));
2798}
2799#else
2800#define fixup_device_tree_maple()
2801#define fixup_device_tree_maple_memory_controller()
2802#endif
2803
2804#ifdef CONFIG_PPC_CHRP
2805/*
2806 * Pegasos and BriQ lacks the "ranges" property in the isa node
2807 * Pegasos needs decimal IRQ 14/15, not hexadecimal
2808 * Pegasos has the IDE configured in legacy mode, but advertised as native
2809 */
2810static void __init fixup_device_tree_chrp(void)
2811{
2812 phandle ph;
2813 u32 prop[6];
2814 u32 rloc = 0x01006000; /* IO space; PCI device = 12 */
2815 char *name;
2816 int rc;
2817
2818 name = "/pci@80000000/isa@c";
2819 ph = call_prom("finddevice", 1, 1, ADDR(name));
2820 if (!PHANDLE_VALID(ph)) {
2821 name = "/pci@ff500000/isa@6";
2822 ph = call_prom("finddevice", 1, 1, ADDR(name));
2823 rloc = 0x01003000; /* IO space; PCI device = 6 */
2824 }
2825 if (PHANDLE_VALID(ph)) {
2826 rc = prom_getproplen(ph, "ranges");
2827 if (rc == 0 || rc == PROM_ERROR) {
2828 prom_printf("Fixing up missing ISA range on Pegasos...\n");
2829
2830 prop[0] = 0x1;
2831 prop[1] = 0x0;
2832 prop[2] = rloc;
2833 prop[3] = 0x0;
2834 prop[4] = 0x0;
2835 prop[5] = 0x00010000;
2836 prom_setprop(ph, name, "ranges", prop, sizeof(prop));
2837 }
2838 }
2839
2840 name = "/pci@80000000/ide@C,1";
2841 ph = call_prom("finddevice", 1, 1, ADDR(name));
2842 if (PHANDLE_VALID(ph)) {
2843 prom_printf("Fixing up IDE interrupt on Pegasos...\n");
2844 prop[0] = 14;
2845 prop[1] = 0x0;
2846 prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32));
2847 prom_printf("Fixing up IDE class-code on Pegasos...\n");
2848 rc = prom_getprop(ph, "class-code", prop, sizeof(u32));
2849 if (rc == sizeof(u32)) {
2850 prop[0] &= ~0x5;
2851 prom_setprop(ph, name, "class-code", prop, sizeof(u32));
2852 }
2853 }
2854}
2855#else
2856#define fixup_device_tree_chrp()
2857#endif
2858
2859#if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)
2860static void __init fixup_device_tree_pmac(void)
2861{
2862 phandle u3, i2c, mpic;
2863 u32 u3_rev;
2864 u32 interrupts[2];
2865 u32 parent;
2866
2867 /* Some G5s have a missing interrupt definition, fix it up here */
2868 u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000"));
2869 if (!PHANDLE_VALID(u3))
2870 return;
2871 i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000"));
2872 if (!PHANDLE_VALID(i2c))
2873 return;
2874 mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000"));
2875 if (!PHANDLE_VALID(mpic))
2876 return;
2877
2878 /* check if proper rev of u3 */
2879 if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev))
2880 == PROM_ERROR)
2881 return;
2882 if (u3_rev < 0x35 || u3_rev > 0x39)
2883 return;
2884 /* does it need fixup ? */
2885 if (prom_getproplen(i2c, "interrupts") > 0)
2886 return;
2887
2888 prom_printf("fixing up bogus interrupts for u3 i2c...\n");
2889
2890 /* interrupt on this revision of u3 is number 0 and level */
2891 interrupts[0] = 0;
2892 interrupts[1] = 1;
2893 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts",
2894 &interrupts, sizeof(interrupts));
2895 parent = (u32)mpic;
2896 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent",
2897 &parent, sizeof(parent));
2898}
2899#else
2900#define fixup_device_tree_pmac()
2901#endif
2902
2903#ifdef CONFIG_PPC_EFIKA
2904/*
2905 * The MPC5200 FEC driver requires an phy-handle property to tell it how
2906 * to talk to the phy. If the phy-handle property is missing, then this
2907 * function is called to add the appropriate nodes and link it to the
2908 * ethernet node.
2909 */
2910static void __init fixup_device_tree_efika_add_phy(void)
2911{
2912 u32 node;
2913 char prop[64];
2914 int rv;
2915
2916 /* Check if /builtin/ethernet exists - bail if it doesn't */
2917 node = call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet"));
2918 if (!PHANDLE_VALID(node))
2919 return;
2920
2921 /* Check if the phy-handle property exists - bail if it does */
2922 rv = prom_getprop(node, "phy-handle", prop, sizeof(prop));
2923 if (!rv)
2924 return;
2925
2926 /*
2927 * At this point the ethernet device doesn't have a phy described.
2928 * Now we need to add the missing phy node and linkage
2929 */
2930
2931 /* Check for an MDIO bus node - if missing then create one */
2932 node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio"));
2933 if (!PHANDLE_VALID(node)) {
2934 prom_printf("Adding Ethernet MDIO node\n");
2935 call_prom("interpret", 1, 1,
2936 " s\" /builtin\" find-device"
2937 " new-device"
2938 " 1 encode-int s\" #address-cells\" property"
2939 " 0 encode-int s\" #size-cells\" property"
2940 " s\" mdio\" device-name"
2941 " s\" fsl,mpc5200b-mdio\" encode-string"
2942 " s\" compatible\" property"
2943 " 0xf0003000 0x400 reg"
2944 " 0x2 encode-int"
2945 " 0x5 encode-int encode+"
2946 " 0x3 encode-int encode+"
2947 " s\" interrupts\" property"
2948 " finish-device");
2949 };
2950
2951 /* Check for a PHY device node - if missing then create one and
2952 * give it's phandle to the ethernet node */
2953 node = call_prom("finddevice", 1, 1,
2954 ADDR("/builtin/mdio/ethernet-phy"));
2955 if (!PHANDLE_VALID(node)) {
2956 prom_printf("Adding Ethernet PHY node\n");
2957 call_prom("interpret", 1, 1,
2958 " s\" /builtin/mdio\" find-device"
2959 " new-device"
2960 " s\" ethernet-phy\" device-name"
2961 " 0x10 encode-int s\" reg\" property"
2962 " my-self"
2963 " ihandle>phandle"
2964 " finish-device"
2965 " s\" /builtin/ethernet\" find-device"
2966 " encode-int"
2967 " s\" phy-handle\" property"
2968 " device-end");
2969 }
2970}
2971
2972static void __init fixup_device_tree_efika(void)
2973{
2974 int sound_irq[3] = { 2, 2, 0 };
2975 int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0,
2976 3,4,0, 3,5,0, 3,6,0, 3,7,0,
2977 3,8,0, 3,9,0, 3,10,0, 3,11,0,
2978 3,12,0, 3,13,0, 3,14,0, 3,15,0 };
2979 u32 node;
2980 char prop[64];
2981 int rv, len;
2982
2983 /* Check if we're really running on a EFIKA */
2984 node = call_prom("finddevice", 1, 1, ADDR("/"));
2985 if (!PHANDLE_VALID(node))
2986 return;
2987
2988 rv = prom_getprop(node, "model", prop, sizeof(prop));
2989 if (rv == PROM_ERROR)
2990 return;
2991 if (prom_strcmp(prop, "EFIKA5K2"))
2992 return;
2993
2994 prom_printf("Applying EFIKA device tree fixups\n");
2995
2996 /* Claiming to be 'chrp' is death */
2997 node = call_prom("finddevice", 1, 1, ADDR("/"));
2998 rv = prom_getprop(node, "device_type", prop, sizeof(prop));
2999 if (rv != PROM_ERROR && (prom_strcmp(prop, "chrp") == 0))
3000 prom_setprop(node, "/", "device_type", "efika", sizeof("efika"));
3001
3002 /* CODEGEN,description is exposed in /proc/cpuinfo so
3003 fix that too */
3004 rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop));
3005 if (rv != PROM_ERROR && (prom_strstr(prop, "CHRP")))
3006 prom_setprop(node, "/", "CODEGEN,description",
3007 "Efika 5200B PowerPC System",
3008 sizeof("Efika 5200B PowerPC System"));
3009
3010 /* Fixup bestcomm interrupts property */
3011 node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm"));
3012 if (PHANDLE_VALID(node)) {
3013 len = prom_getproplen(node, "interrupts");
3014 if (len == 12) {
3015 prom_printf("Fixing bestcomm interrupts property\n");
3016 prom_setprop(node, "/builtin/bestcom", "interrupts",
3017 bcomm_irq, sizeof(bcomm_irq));
3018 }
3019 }
3020
3021 /* Fixup sound interrupts property */
3022 node = call_prom("finddevice", 1, 1, ADDR("/builtin/sound"));
3023 if (PHANDLE_VALID(node)) {
3024 rv = prom_getprop(node, "interrupts", prop, sizeof(prop));
3025 if (rv == PROM_ERROR) {
3026 prom_printf("Adding sound interrupts property\n");
3027 prom_setprop(node, "/builtin/sound", "interrupts",
3028 sound_irq, sizeof(sound_irq));
3029 }
3030 }
3031
3032 /* Make sure ethernet phy-handle property exists */
3033 fixup_device_tree_efika_add_phy();
3034}
3035#else
3036#define fixup_device_tree_efika()
3037#endif
3038
3039#ifdef CONFIG_PPC_PASEMI_NEMO
3040/*
3041 * CFE supplied on Nemo is broken in several ways, biggest
3042 * problem is that it reassigns ISA interrupts to unused mpic ints.
3043 * Add an interrupt-controller property for the io-bridge to use
3044 * and correct the ints so we can attach them to an irq_domain
3045 */
3046static void __init fixup_device_tree_pasemi(void)
3047{
3048 u32 interrupts[2], parent, rval, val = 0;
3049 char *name, *pci_name;
3050 phandle iob, node;
3051
3052 /* Find the root pci node */
3053 name = "/pxp@0,e0000000";
3054 iob = call_prom("finddevice", 1, 1, ADDR(name));
3055 if (!PHANDLE_VALID(iob))
3056 return;
3057
3058 /* check if interrupt-controller node set yet */
3059 if (prom_getproplen(iob, "interrupt-controller") !=PROM_ERROR)
3060 return;
3061
3062 prom_printf("adding interrupt-controller property for SB600...\n");
3063
3064 prom_setprop(iob, name, "interrupt-controller", &val, 0);
3065
3066 pci_name = "/pxp@0,e0000000/pci@11";
3067 node = call_prom("finddevice", 1, 1, ADDR(pci_name));
3068 parent = ADDR(iob);
3069
3070 for( ; prom_next_node(&node); ) {
3071 /* scan each node for one with an interrupt */
3072 if (!PHANDLE_VALID(node))
3073 continue;
3074
3075 rval = prom_getproplen(node, "interrupts");
3076 if (rval == 0 || rval == PROM_ERROR)
3077 continue;
3078
3079 prom_getprop(node, "interrupts", &interrupts, sizeof(interrupts));
3080 if ((interrupts[0] < 212) || (interrupts[0] > 222))
3081 continue;
3082
3083 /* found a node, update both interrupts and interrupt-parent */
3084 if ((interrupts[0] >= 212) && (interrupts[0] <= 215))
3085 interrupts[0] -= 203;
3086 if ((interrupts[0] >= 216) && (interrupts[0] <= 220))
3087 interrupts[0] -= 213;
3088 if (interrupts[0] == 221)
3089 interrupts[0] = 14;
3090 if (interrupts[0] == 222)
3091 interrupts[0] = 8;
3092
3093 prom_setprop(node, pci_name, "interrupts", interrupts,
3094 sizeof(interrupts));
3095 prom_setprop(node, pci_name, "interrupt-parent", &parent,
3096 sizeof(parent));
3097 }
3098
3099 /*
3100 * The io-bridge has device_type set to 'io-bridge' change it to 'isa'
3101 * so that generic isa-bridge code can add the SB600 and its on-board
3102 * peripherals.
3103 */
3104 name = "/pxp@0,e0000000/io-bridge@0";
3105 iob = call_prom("finddevice", 1, 1, ADDR(name));
3106 if (!PHANDLE_VALID(iob))
3107 return;
3108
3109 /* device_type is already set, just change it. */
3110
3111 prom_printf("Changing device_type of SB600 node...\n");
3112
3113 prom_setprop(iob, name, "device_type", "isa", sizeof("isa"));
3114}
3115#else /* !CONFIG_PPC_PASEMI_NEMO */
3116static inline void fixup_device_tree_pasemi(void) { }
3117#endif
3118
3119static void __init fixup_device_tree(void)
3120{
3121 fixup_device_tree_maple();
3122 fixup_device_tree_maple_memory_controller();
3123 fixup_device_tree_chrp();
3124 fixup_device_tree_pmac();
3125 fixup_device_tree_efika();
3126 fixup_device_tree_pasemi();
3127}
3128
3129static void __init prom_find_boot_cpu(void)
3130{
3131 __be32 rval;
3132 ihandle prom_cpu;
3133 phandle cpu_pkg;
3134
3135 rval = 0;
3136 if (prom_getprop(prom.chosen, "cpu", &rval, sizeof(rval)) <= 0)
3137 return;
3138 prom_cpu = be32_to_cpu(rval);
3139
3140 cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu);
3141
3142 if (!PHANDLE_VALID(cpu_pkg))
3143 return;
3144
3145 prom_getprop(cpu_pkg, "reg", &rval, sizeof(rval));
3146 prom.cpu = be32_to_cpu(rval);
3147
3148 prom_debug("Booting CPU hw index = %d\n", prom.cpu);
3149}
3150
3151static void __init prom_check_initrd(unsigned long r3, unsigned long r4)
3152{
3153#ifdef CONFIG_BLK_DEV_INITRD
3154 if (r3 && r4 && r4 != 0xdeadbeef) {
3155 __be64 val;
3156
3157 prom_initrd_start = is_kernel_addr(r3) ? __pa(r3) : r3;
3158 prom_initrd_end = prom_initrd_start + r4;
3159
3160 val = cpu_to_be64(prom_initrd_start);
3161 prom_setprop(prom.chosen, "/chosen", "linux,initrd-start",
3162 &val, sizeof(val));
3163 val = cpu_to_be64(prom_initrd_end);
3164 prom_setprop(prom.chosen, "/chosen", "linux,initrd-end",
3165 &val, sizeof(val));
3166
3167 reserve_mem(prom_initrd_start,
3168 prom_initrd_end - prom_initrd_start);
3169
3170 prom_debug("initrd_start=0x%lx\n", prom_initrd_start);
3171 prom_debug("initrd_end=0x%lx\n", prom_initrd_end);
3172 }
3173#endif /* CONFIG_BLK_DEV_INITRD */
3174}
3175
3176#ifdef CONFIG_PPC64
3177#ifdef CONFIG_RELOCATABLE
3178static void reloc_toc(void)
3179{
3180}
3181
3182static void unreloc_toc(void)
3183{
3184}
3185#else
3186static void __reloc_toc(unsigned long offset, unsigned long nr_entries)
3187{
3188 unsigned long i;
3189 unsigned long *toc_entry;
3190
3191 /* Get the start of the TOC by using r2 directly. */
3192 asm volatile("addi %0,2,-0x8000" : "=b" (toc_entry));
3193
3194 for (i = 0; i < nr_entries; i++) {
3195 *toc_entry = *toc_entry + offset;
3196 toc_entry++;
3197 }
3198}
3199
3200static void reloc_toc(void)
3201{
3202 unsigned long offset = reloc_offset();
3203 unsigned long nr_entries =
3204 (__prom_init_toc_end - __prom_init_toc_start) / sizeof(long);
3205
3206 __reloc_toc(offset, nr_entries);
3207
3208 mb();
3209}
3210
3211static void unreloc_toc(void)
3212{
3213 unsigned long offset = reloc_offset();
3214 unsigned long nr_entries =
3215 (__prom_init_toc_end - __prom_init_toc_start) / sizeof(long);
3216
3217 mb();
3218
3219 __reloc_toc(-offset, nr_entries);
3220}
3221#endif
3222#endif
3223
3224#ifdef CONFIG_PPC_SVM
3225/*
3226 * Perform the Enter Secure Mode ultracall.
3227 */
3228static int enter_secure_mode(unsigned long kbase, unsigned long fdt)
3229{
3230 register unsigned long r3 asm("r3") = UV_ESM;
3231 register unsigned long r4 asm("r4") = kbase;
3232 register unsigned long r5 asm("r5") = fdt;
3233
3234 asm volatile("sc 2" : "+r"(r3) : "r"(r4), "r"(r5));
3235
3236 return r3;
3237}
3238
3239/*
3240 * Call the Ultravisor to transfer us to secure memory if we have an ESM blob.
3241 */
3242static void setup_secure_guest(unsigned long kbase, unsigned long fdt)
3243{
3244 int ret;
3245
3246 if (!prom_svm_enable)
3247 return;
3248
3249 /* Switch to secure mode. */
3250 prom_printf("Switching to secure mode.\n");
3251
3252 /*
3253 * The ultravisor will do an integrity check of the kernel image but we
3254 * relocated it so the check will fail. Restore the original image by
3255 * relocating it back to the kernel virtual base address.
3256 */
3257 if (IS_ENABLED(CONFIG_RELOCATABLE))
3258 relocate(KERNELBASE);
3259
3260 ret = enter_secure_mode(kbase, fdt);
3261
3262 /* Relocate the kernel again. */
3263 if (IS_ENABLED(CONFIG_RELOCATABLE))
3264 relocate(kbase);
3265
3266 if (ret != U_SUCCESS) {
3267 prom_printf("Returned %d from switching to secure mode.\n", ret);
3268 prom_rtas_os_term("Switch to secure mode failed.\n");
3269 }
3270}
3271#else
3272static void setup_secure_guest(unsigned long kbase, unsigned long fdt)
3273{
3274}
3275#endif /* CONFIG_PPC_SVM */
3276
3277/*
3278 * We enter here early on, when the Open Firmware prom is still
3279 * handling exceptions and the MMU hash table for us.
3280 */
3281
3282unsigned long __init prom_init(unsigned long r3, unsigned long r4,
3283 unsigned long pp,
3284 unsigned long r6, unsigned long r7,
3285 unsigned long kbase)
3286{
3287 unsigned long hdr;
3288
3289#ifdef CONFIG_PPC32
3290 unsigned long offset = reloc_offset();
3291 reloc_got2(offset);
3292#else
3293 reloc_toc();
3294#endif
3295
3296 /*
3297 * First zero the BSS
3298 */
3299 memset(&__bss_start, 0, __bss_stop - __bss_start);
3300
3301 /*
3302 * Init interface to Open Firmware, get some node references,
3303 * like /chosen
3304 */
3305 prom_init_client_services(pp);
3306
3307 /*
3308 * See if this OF is old enough that we need to do explicit maps
3309 * and other workarounds
3310 */
3311 prom_find_mmu();
3312
3313 /*
3314 * Init prom stdout device
3315 */
3316 prom_init_stdout();
3317
3318 prom_printf("Preparing to boot %s", linux_banner);
3319
3320 /*
3321 * Get default machine type. At this point, we do not differentiate
3322 * between pSeries SMP and pSeries LPAR
3323 */
3324 of_platform = prom_find_machine_type();
3325 prom_printf("Detected machine type: %x\n", of_platform);
3326
3327#ifndef CONFIG_NONSTATIC_KERNEL
3328 /* Bail if this is a kdump kernel. */
3329 if (PHYSICAL_START > 0)
3330 prom_panic("Error: You can't boot a kdump kernel from OF!\n");
3331#endif
3332
3333 /*
3334 * Check for an initrd
3335 */
3336 prom_check_initrd(r3, r4);
3337
3338 /*
3339 * Do early parsing of command line
3340 */
3341 early_cmdline_parse();
3342
3343#ifdef CONFIG_PPC_PSERIES
3344 /*
3345 * On pSeries, inform the firmware about our capabilities
3346 */
3347 if (of_platform == PLATFORM_PSERIES ||
3348 of_platform == PLATFORM_PSERIES_LPAR)
3349 prom_send_capabilities();
3350#endif
3351
3352 /*
3353 * Copy the CPU hold code
3354 */
3355 if (of_platform != PLATFORM_POWERMAC)
3356 copy_and_flush(0, kbase, 0x100, 0);
3357
3358 /*
3359 * Initialize memory management within prom_init
3360 */
3361 prom_init_mem();
3362
3363 /*
3364 * Determine which cpu is actually running right _now_
3365 */
3366 prom_find_boot_cpu();
3367
3368 /*
3369 * Initialize display devices
3370 */
3371 prom_check_displays();
3372
3373#if defined(CONFIG_PPC64) && defined(__BIG_ENDIAN__)
3374 /*
3375 * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else
3376 * that uses the allocator, we need to make sure we get the top of memory
3377 * available for us here...
3378 */
3379 if (of_platform == PLATFORM_PSERIES)
3380 prom_initialize_tce_table();
3381#endif
3382
3383 /*
3384 * On non-powermacs, try to instantiate RTAS. PowerMacs don't
3385 * have a usable RTAS implementation.
3386 */
3387 if (of_platform != PLATFORM_POWERMAC)
3388 prom_instantiate_rtas();
3389
3390#ifdef CONFIG_PPC64
3391 /* instantiate sml */
3392 prom_instantiate_sml();
3393#endif
3394
3395 /*
3396 * On non-powermacs, put all CPUs in spin-loops.
3397 *
3398 * PowerMacs use a different mechanism to spin CPUs
3399 *
3400 * (This must be done after instanciating RTAS)
3401 */
3402 if (of_platform != PLATFORM_POWERMAC)
3403 prom_hold_cpus();
3404
3405 /*
3406 * Fill in some infos for use by the kernel later on
3407 */
3408 if (prom_memory_limit) {
3409 __be64 val = cpu_to_be64(prom_memory_limit);
3410 prom_setprop(prom.chosen, "/chosen", "linux,memory-limit",
3411 &val, sizeof(val));
3412 }
3413#ifdef CONFIG_PPC64
3414 if (prom_iommu_off)
3415 prom_setprop(prom.chosen, "/chosen", "linux,iommu-off",
3416 NULL, 0);
3417
3418 if (prom_iommu_force_on)
3419 prom_setprop(prom.chosen, "/chosen", "linux,iommu-force-on",
3420 NULL, 0);
3421
3422 if (prom_tce_alloc_start) {
3423 prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-start",
3424 &prom_tce_alloc_start,
3425 sizeof(prom_tce_alloc_start));
3426 prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-end",
3427 &prom_tce_alloc_end,
3428 sizeof(prom_tce_alloc_end));
3429 }
3430#endif
3431
3432 /*
3433 * Fixup any known bugs in the device-tree
3434 */
3435 fixup_device_tree();
3436
3437 /*
3438 * Now finally create the flattened device-tree
3439 */
3440 prom_printf("copying OF device tree...\n");
3441 flatten_device_tree();
3442
3443 /*
3444 * in case stdin is USB and still active on IBM machines...
3445 * Unfortunately quiesce crashes on some powermacs if we have
3446 * closed stdin already (in particular the powerbook 101).
3447 */
3448 if (of_platform != PLATFORM_POWERMAC)
3449 prom_close_stdin();
3450
3451 /*
3452 * Call OF "quiesce" method to shut down pending DMA's from
3453 * devices etc...
3454 */
3455 prom_printf("Quiescing Open Firmware ...\n");
3456 call_prom("quiesce", 0, 0);
3457
3458 /*
3459 * And finally, call the kernel passing it the flattened device
3460 * tree and NULL as r5, thus triggering the new entry point which
3461 * is common to us and kexec
3462 */
3463 hdr = dt_header_start;
3464
3465 /* Don't print anything after quiesce under OPAL, it crashes OFW */
3466 prom_printf("Booting Linux via __start() @ 0x%lx ...\n", kbase);
3467 prom_debug("->dt_header_start=0x%lx\n", hdr);
3468
3469#ifdef CONFIG_PPC32
3470 reloc_got2(-offset);
3471#else
3472 unreloc_toc();
3473#endif
3474
3475 /* Move to secure memory if we're supposed to be secure guests. */
3476 setup_secure_guest(kbase, hdr);
3477
3478 __start(hdr, kbase, 0, 0, 0, 0, 0);
3479
3480 return 0;
3481}