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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 <linux/printk.h>
31#include <asm/prom.h>
32#include <asm/rtas.h>
33#include <asm/page.h>
34#include <asm/processor.h>
35#include <asm/interrupt.h>
36#include <asm/irq.h>
37#include <asm/io.h>
38#include <asm/smp.h>
39#include <asm/mmu.h>
40#include <asm/iommu.h>
41#include <asm/btext.h>
42#include <asm/sections.h>
43#include <asm/machdep.h>
44#include <asm/asm-prototypes.h>
45#include <asm/ultravisor-api.h>
46
47#include <linux/linux_logo.h>
48
49/* All of prom_init bss lives here */
50#define __prombss __section(".bss.prominit")
51
52/*
53 * Eventually bump that one up
54 */
55#define DEVTREE_CHUNK_SIZE 0x100000
56
57/*
58 * This is the size of the local memory reserve map that gets copied
59 * into the boot params passed to the kernel. That size is totally
60 * flexible as the kernel just reads the list until it encounters an
61 * entry with size 0, so it can be changed without breaking binary
62 * compatibility
63 */
64#define MEM_RESERVE_MAP_SIZE 8
65
66/*
67 * prom_init() is called very early on, before the kernel text
68 * and data have been mapped to KERNELBASE. At this point the code
69 * is running at whatever address it has been loaded at.
70 * On ppc32 we compile with -mrelocatable, which means that references
71 * to extern and static variables get relocated automatically.
72 * ppc64 objects are always relocatable, we just need to relocate the
73 * TOC.
74 *
75 * Because OF may have mapped I/O devices into the area starting at
76 * KERNELBASE, particularly on CHRP machines, we can't safely call
77 * OF once the kernel has been mapped to KERNELBASE. Therefore all
78 * OF calls must be done within prom_init().
79 *
80 * ADDR is used in calls to call_prom. The 4th and following
81 * arguments to call_prom should be 32-bit values.
82 * On ppc64, 64 bit values are truncated to 32 bits (and
83 * fortunately don't get interpreted as two arguments).
84 */
85#define ADDR(x) (u32)(unsigned long)(x)
86
87#ifdef CONFIG_PPC64
88#define OF_WORKAROUNDS 0
89#else
90#define OF_WORKAROUNDS of_workarounds
91static int of_workarounds __prombss;
92#endif
93
94#define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */
95#define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */
96
97#define PROM_BUG() do { \
98 prom_printf("kernel BUG at %s line 0x%x!\n", \
99 __FILE__, __LINE__); \
100 __builtin_trap(); \
101} while (0)
102
103#ifdef DEBUG_PROM
104#define prom_debug(x...) prom_printf(x)
105#else
106#define prom_debug(x...) do { } while (0)
107#endif
108
109
110typedef u32 prom_arg_t;
111
112struct prom_args {
113 __be32 service;
114 __be32 nargs;
115 __be32 nret;
116 __be32 args[10];
117};
118
119struct prom_t {
120 ihandle root;
121 phandle chosen;
122 int cpu;
123 ihandle stdout;
124 ihandle mmumap;
125 ihandle memory;
126};
127
128struct mem_map_entry {
129 __be64 base;
130 __be64 size;
131};
132
133typedef __be32 cell_t;
134
135extern void __start(unsigned long r3, unsigned long r4, unsigned long r5,
136 unsigned long r6, unsigned long r7, unsigned long r8,
137 unsigned long r9);
138
139#ifdef CONFIG_PPC64
140extern int enter_prom(struct prom_args *args, unsigned long entry);
141#else
142static inline int enter_prom(struct prom_args *args, unsigned long entry)
143{
144 return ((int (*)(struct prom_args *))entry)(args);
145}
146#endif
147
148extern void copy_and_flush(unsigned long dest, unsigned long src,
149 unsigned long size, unsigned long offset);
150
151/* prom structure */
152static struct prom_t __prombss prom;
153
154static unsigned long __prombss prom_entry;
155
156static char __prombss of_stdout_device[256];
157static char __prombss prom_scratch[256];
158
159static unsigned long __prombss dt_header_start;
160static unsigned long __prombss dt_struct_start, dt_struct_end;
161static unsigned long __prombss dt_string_start, dt_string_end;
162
163static unsigned long __prombss prom_initrd_start, prom_initrd_end;
164
165#ifdef CONFIG_PPC64
166static int __prombss prom_iommu_force_on;
167static int __prombss prom_iommu_off;
168static unsigned long __prombss prom_tce_alloc_start;
169static unsigned long __prombss prom_tce_alloc_end;
170#endif
171
172#ifdef CONFIG_PPC_PSERIES
173static bool __prombss prom_radix_disable;
174static bool __prombss prom_radix_gtse_disable;
175static bool __prombss prom_xive_disable;
176#endif
177
178#ifdef CONFIG_PPC_SVM
179static bool __prombss prom_svm_enable;
180#endif
181
182struct platform_support {
183 bool hash_mmu;
184 bool radix_mmu;
185 bool radix_gtse;
186 bool xive;
187};
188
189/* Platforms codes are now obsolete in the kernel. Now only used within this
190 * file and ultimately gone too. Feel free to change them if you need, they
191 * are not shared with anything outside of this file anymore
192 */
193#define PLATFORM_PSERIES 0x0100
194#define PLATFORM_PSERIES_LPAR 0x0101
195#define PLATFORM_LPAR 0x0001
196#define PLATFORM_POWERMAC 0x0400
197#define PLATFORM_GENERIC 0x0500
198
199static int __prombss of_platform;
200
201static char __prombss prom_cmd_line[COMMAND_LINE_SIZE];
202
203static unsigned long __prombss prom_memory_limit;
204
205static unsigned long __prombss alloc_top;
206static unsigned long __prombss alloc_top_high;
207static unsigned long __prombss alloc_bottom;
208static unsigned long __prombss rmo_top;
209static unsigned long __prombss ram_top;
210
211static struct mem_map_entry __prombss mem_reserve_map[MEM_RESERVE_MAP_SIZE];
212static int __prombss mem_reserve_cnt;
213
214static cell_t __prombss regbuf[1024];
215
216static bool __prombss rtas_has_query_cpu_stopped;
217
218
219/*
220 * Error results ... some OF calls will return "-1" on error, some
221 * will return 0, some will return either. To simplify, here are
222 * macros to use with any ihandle or phandle return value to check if
223 * it is valid
224 */
225
226#define PROM_ERROR (-1u)
227#define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR)
228#define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR)
229
230/* Copied from lib/string.c and lib/kstrtox.c */
231
232static int __init prom_strcmp(const char *cs, const char *ct)
233{
234 unsigned char c1, c2;
235
236 while (1) {
237 c1 = *cs++;
238 c2 = *ct++;
239 if (c1 != c2)
240 return c1 < c2 ? -1 : 1;
241 if (!c1)
242 break;
243 }
244 return 0;
245}
246
247static ssize_t __init prom_strscpy_pad(char *dest, const char *src, size_t n)
248{
249 ssize_t rc;
250 size_t i;
251
252 if (n == 0 || n > INT_MAX)
253 return -E2BIG;
254
255 // Copy up to n bytes
256 for (i = 0; i < n && src[i] != '\0'; i++)
257 dest[i] = src[i];
258
259 rc = i;
260
261 // If we copied all n then we have run out of space for the nul
262 if (rc == n) {
263 // Rewind by one character to ensure nul termination
264 i--;
265 rc = -E2BIG;
266 }
267
268 for (; i < n; i++)
269 dest[i] = '\0';
270
271 return rc;
272}
273
274static int __init prom_strncmp(const char *cs, const char *ct, size_t count)
275{
276 unsigned char c1, c2;
277
278 while (count) {
279 c1 = *cs++;
280 c2 = *ct++;
281 if (c1 != c2)
282 return c1 < c2 ? -1 : 1;
283 if (!c1)
284 break;
285 count--;
286 }
287 return 0;
288}
289
290static size_t __init prom_strlen(const char *s)
291{
292 const char *sc;
293
294 for (sc = s; *sc != '\0'; ++sc)
295 /* nothing */;
296 return sc - s;
297}
298
299static int __init prom_memcmp(const void *cs, const void *ct, size_t count)
300{
301 const unsigned char *su1, *su2;
302 int res = 0;
303
304 for (su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
305 if ((res = *su1 - *su2) != 0)
306 break;
307 return res;
308}
309
310static char __init *prom_strstr(const char *s1, const char *s2)
311{
312 size_t l1, l2;
313
314 l2 = prom_strlen(s2);
315 if (!l2)
316 return (char *)s1;
317 l1 = prom_strlen(s1);
318 while (l1 >= l2) {
319 l1--;
320 if (!prom_memcmp(s1, s2, l2))
321 return (char *)s1;
322 s1++;
323 }
324 return NULL;
325}
326
327static size_t __init prom_strlcat(char *dest, const char *src, size_t count)
328{
329 size_t dsize = prom_strlen(dest);
330 size_t len = prom_strlen(src);
331 size_t res = dsize + len;
332
333 /* This would be a bug */
334 if (dsize >= count)
335 return count;
336
337 dest += dsize;
338 count -= dsize;
339 if (len >= count)
340 len = count-1;
341 memcpy(dest, src, len);
342 dest[len] = 0;
343 return res;
344
345}
346
347#ifdef CONFIG_PPC_PSERIES
348static int __init prom_strtobool(const char *s, bool *res)
349{
350 if (!s)
351 return -EINVAL;
352
353 switch (s[0]) {
354 case 'y':
355 case 'Y':
356 case '1':
357 *res = true;
358 return 0;
359 case 'n':
360 case 'N':
361 case '0':
362 *res = false;
363 return 0;
364 case 'o':
365 case 'O':
366 switch (s[1]) {
367 case 'n':
368 case 'N':
369 *res = true;
370 return 0;
371 case 'f':
372 case 'F':
373 *res = false;
374 return 0;
375 default:
376 break;
377 }
378 break;
379 default:
380 break;
381 }
382
383 return -EINVAL;
384}
385#endif
386
387/* This is the one and *ONLY* place where we actually call open
388 * firmware.
389 */
390
391static int __init call_prom(const char *service, int nargs, int nret, ...)
392{
393 int i;
394 struct prom_args args;
395 va_list list;
396
397 args.service = cpu_to_be32(ADDR(service));
398 args.nargs = cpu_to_be32(nargs);
399 args.nret = cpu_to_be32(nret);
400
401 va_start(list, nret);
402 for (i = 0; i < nargs; i++)
403 args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
404 va_end(list);
405
406 for (i = 0; i < nret; i++)
407 args.args[nargs+i] = 0;
408
409 if (enter_prom(&args, prom_entry) < 0)
410 return PROM_ERROR;
411
412 return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
413}
414
415static int __init call_prom_ret(const char *service, int nargs, int nret,
416 prom_arg_t *rets, ...)
417{
418 int i;
419 struct prom_args args;
420 va_list list;
421
422 args.service = cpu_to_be32(ADDR(service));
423 args.nargs = cpu_to_be32(nargs);
424 args.nret = cpu_to_be32(nret);
425
426 va_start(list, rets);
427 for (i = 0; i < nargs; i++)
428 args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
429 va_end(list);
430
431 for (i = 0; i < nret; i++)
432 args.args[nargs+i] = 0;
433
434 if (enter_prom(&args, prom_entry) < 0)
435 return PROM_ERROR;
436
437 if (rets != NULL)
438 for (i = 1; i < nret; ++i)
439 rets[i-1] = be32_to_cpu(args.args[nargs+i]);
440
441 return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
442}
443
444
445static void __init prom_print(const char *msg)
446{
447 const char *p, *q;
448
449 if (prom.stdout == 0)
450 return;
451
452 for (p = msg; *p != 0; p = q) {
453 for (q = p; *q != 0 && *q != '\n'; ++q)
454 ;
455 if (q > p)
456 call_prom("write", 3, 1, prom.stdout, p, q - p);
457 if (*q == 0)
458 break;
459 ++q;
460 call_prom("write", 3, 1, prom.stdout, ADDR("\r\n"), 2);
461 }
462}
463
464
465/*
466 * Both prom_print_hex & prom_print_dec takes an unsigned long as input so that
467 * we do not need __udivdi3 or __umoddi3 on 32bits.
468 */
469static void __init prom_print_hex(unsigned long val)
470{
471 int i, nibbles = sizeof(val)*2;
472 char buf[sizeof(val)*2+1];
473
474 for (i = nibbles-1; i >= 0; i--) {
475 buf[i] = (val & 0xf) + '0';
476 if (buf[i] > '9')
477 buf[i] += ('a'-'0'-10);
478 val >>= 4;
479 }
480 buf[nibbles] = '\0';
481 call_prom("write", 3, 1, prom.stdout, buf, nibbles);
482}
483
484/* max number of decimal digits in an unsigned long */
485#define UL_DIGITS 21
486static void __init prom_print_dec(unsigned long val)
487{
488 int i, size;
489 char buf[UL_DIGITS+1];
490
491 for (i = UL_DIGITS-1; i >= 0; i--) {
492 buf[i] = (val % 10) + '0';
493 val = val/10;
494 if (val == 0)
495 break;
496 }
497 /* shift stuff down */
498 size = UL_DIGITS - i;
499 call_prom("write", 3, 1, prom.stdout, buf+i, size);
500}
501
502__printf(1, 2)
503static void __init prom_printf(const char *format, ...)
504{
505 const char *p, *q, *s;
506 va_list args;
507 unsigned long v;
508 long vs;
509 int n = 0;
510
511 va_start(args, format);
512 for (p = format; *p != 0; p = q) {
513 for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q)
514 ;
515 if (q > p)
516 call_prom("write", 3, 1, prom.stdout, p, q - p);
517 if (*q == 0)
518 break;
519 if (*q == '\n') {
520 ++q;
521 call_prom("write", 3, 1, prom.stdout,
522 ADDR("\r\n"), 2);
523 continue;
524 }
525 ++q;
526 if (*q == 0)
527 break;
528 while (*q == 'l') {
529 ++q;
530 ++n;
531 }
532 switch (*q) {
533 case 's':
534 ++q;
535 s = va_arg(args, const char *);
536 prom_print(s);
537 break;
538 case 'x':
539 ++q;
540 switch (n) {
541 case 0:
542 v = va_arg(args, unsigned int);
543 break;
544 case 1:
545 v = va_arg(args, unsigned long);
546 break;
547 case 2:
548 default:
549 v = va_arg(args, unsigned long long);
550 break;
551 }
552 prom_print_hex(v);
553 break;
554 case 'u':
555 ++q;
556 switch (n) {
557 case 0:
558 v = va_arg(args, unsigned int);
559 break;
560 case 1:
561 v = va_arg(args, unsigned long);
562 break;
563 case 2:
564 default:
565 v = va_arg(args, unsigned long long);
566 break;
567 }
568 prom_print_dec(v);
569 break;
570 case 'd':
571 ++q;
572 switch (n) {
573 case 0:
574 vs = va_arg(args, int);
575 break;
576 case 1:
577 vs = va_arg(args, long);
578 break;
579 case 2:
580 default:
581 vs = va_arg(args, long long);
582 break;
583 }
584 if (vs < 0) {
585 prom_print("-");
586 vs = -vs;
587 }
588 prom_print_dec(vs);
589 break;
590 }
591 }
592 va_end(args);
593}
594
595
596static unsigned int __init prom_claim(unsigned long virt, unsigned long size,
597 unsigned long align)
598{
599
600 if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) {
601 /*
602 * Old OF requires we claim physical and virtual separately
603 * and then map explicitly (assuming virtual mode)
604 */
605 int ret;
606 prom_arg_t result;
607
608 ret = call_prom_ret("call-method", 5, 2, &result,
609 ADDR("claim"), prom.memory,
610 align, size, virt);
611 if (ret != 0 || result == -1)
612 return -1;
613 ret = call_prom_ret("call-method", 5, 2, &result,
614 ADDR("claim"), prom.mmumap,
615 align, size, virt);
616 if (ret != 0) {
617 call_prom("call-method", 4, 1, ADDR("release"),
618 prom.memory, size, virt);
619 return -1;
620 }
621 /* the 0x12 is M (coherence) + PP == read/write */
622 call_prom("call-method", 6, 1,
623 ADDR("map"), prom.mmumap, 0x12, size, virt, virt);
624 return virt;
625 }
626 return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size,
627 (prom_arg_t)align);
628}
629
630static void __init __attribute__((noreturn)) prom_panic(const char *reason)
631{
632 prom_print(reason);
633 /* Do not call exit because it clears the screen on pmac
634 * it also causes some sort of double-fault on early pmacs */
635 if (of_platform == PLATFORM_POWERMAC)
636 asm("trap\n");
637
638 /* ToDo: should put up an SRC here on pSeries */
639 call_prom("exit", 0, 0);
640
641 for (;;) /* should never get here */
642 ;
643}
644
645
646static int __init prom_next_node(phandle *nodep)
647{
648 phandle node;
649
650 if ((node = *nodep) != 0
651 && (*nodep = call_prom("child", 1, 1, node)) != 0)
652 return 1;
653 if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
654 return 1;
655 for (;;) {
656 if ((node = call_prom("parent", 1, 1, node)) == 0)
657 return 0;
658 if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
659 return 1;
660 }
661}
662
663static inline int __init prom_getprop(phandle node, const char *pname,
664 void *value, size_t valuelen)
665{
666 return call_prom("getprop", 4, 1, node, ADDR(pname),
667 (u32)(unsigned long) value, (u32) valuelen);
668}
669
670static inline int __init prom_getproplen(phandle node, const char *pname)
671{
672 return call_prom("getproplen", 2, 1, node, ADDR(pname));
673}
674
675static void add_string(char **str, const char *q)
676{
677 char *p = *str;
678
679 while (*q)
680 *p++ = *q++;
681 *p++ = ' ';
682 *str = p;
683}
684
685static char *tohex(unsigned int x)
686{
687 static const char digits[] __initconst = "0123456789abcdef";
688 static char result[9] __prombss;
689 int i;
690
691 result[8] = 0;
692 i = 8;
693 do {
694 --i;
695 result[i] = digits[x & 0xf];
696 x >>= 4;
697 } while (x != 0 && i > 0);
698 return &result[i];
699}
700
701static int __init prom_setprop(phandle node, const char *nodename,
702 const char *pname, void *value, size_t valuelen)
703{
704 char cmd[256], *p;
705
706 if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL))
707 return call_prom("setprop", 4, 1, node, ADDR(pname),
708 (u32)(unsigned long) value, (u32) valuelen);
709
710 /* gah... setprop doesn't work on longtrail, have to use interpret */
711 p = cmd;
712 add_string(&p, "dev");
713 add_string(&p, nodename);
714 add_string(&p, tohex((u32)(unsigned long) value));
715 add_string(&p, tohex(valuelen));
716 add_string(&p, tohex(ADDR(pname)));
717 add_string(&p, tohex(prom_strlen(pname)));
718 add_string(&p, "property");
719 *p = 0;
720 return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd);
721}
722
723/* We can't use the standard versions because of relocation headaches. */
724#define prom_isxdigit(c) \
725 (('0' <= (c) && (c) <= '9') || ('a' <= (c) && (c) <= 'f') || ('A' <= (c) && (c) <= 'F'))
726
727#define prom_isdigit(c) ('0' <= (c) && (c) <= '9')
728#define prom_islower(c) ('a' <= (c) && (c) <= 'z')
729#define prom_toupper(c) (prom_islower(c) ? ((c) - 'a' + 'A') : (c))
730
731static unsigned long prom_strtoul(const char *cp, const char **endp)
732{
733 unsigned long result = 0, base = 10, value;
734
735 if (*cp == '0') {
736 base = 8;
737 cp++;
738 if (prom_toupper(*cp) == 'X') {
739 cp++;
740 base = 16;
741 }
742 }
743
744 while (prom_isxdigit(*cp) &&
745 (value = prom_isdigit(*cp) ? *cp - '0' : prom_toupper(*cp) - 'A' + 10) < base) {
746 result = result * base + value;
747 cp++;
748 }
749
750 if (endp)
751 *endp = cp;
752
753 return result;
754}
755
756static unsigned long prom_memparse(const char *ptr, const char **retptr)
757{
758 unsigned long ret = prom_strtoul(ptr, retptr);
759 int shift = 0;
760
761 /*
762 * We can't use a switch here because GCC *may* generate a
763 * jump table which won't work, because we're not running at
764 * the address we're linked at.
765 */
766 if ('G' == **retptr || 'g' == **retptr)
767 shift = 30;
768
769 if ('M' == **retptr || 'm' == **retptr)
770 shift = 20;
771
772 if ('K' == **retptr || 'k' == **retptr)
773 shift = 10;
774
775 if (shift) {
776 ret <<= shift;
777 (*retptr)++;
778 }
779
780 return ret;
781}
782
783/*
784 * Early parsing of the command line passed to the kernel, used for
785 * "mem=x" and the options that affect the iommu
786 */
787static void __init early_cmdline_parse(void)
788{
789 const char *opt;
790
791 char *p;
792 int l = 0;
793
794 prom_cmd_line[0] = 0;
795 p = prom_cmd_line;
796
797 if (!IS_ENABLED(CONFIG_CMDLINE_FORCE) && (long)prom.chosen > 0)
798 l = prom_getprop(prom.chosen, "bootargs", p, COMMAND_LINE_SIZE-1);
799
800 if (IS_ENABLED(CONFIG_CMDLINE_EXTEND) || l <= 0 || p[0] == '\0')
801 prom_strlcat(prom_cmd_line, " " CONFIG_CMDLINE,
802 sizeof(prom_cmd_line));
803
804 prom_printf("command line: %s\n", prom_cmd_line);
805
806#ifdef CONFIG_PPC64
807 opt = prom_strstr(prom_cmd_line, "iommu=");
808 if (opt) {
809 prom_printf("iommu opt is: %s\n", opt);
810 opt += 6;
811 while (*opt && *opt == ' ')
812 opt++;
813 if (!prom_strncmp(opt, "off", 3))
814 prom_iommu_off = 1;
815 else if (!prom_strncmp(opt, "force", 5))
816 prom_iommu_force_on = 1;
817 }
818#endif
819 opt = prom_strstr(prom_cmd_line, "mem=");
820 if (opt) {
821 opt += 4;
822 prom_memory_limit = prom_memparse(opt, (const char **)&opt);
823#ifdef CONFIG_PPC64
824 /* Align to 16 MB == size of ppc64 large page */
825 prom_memory_limit = ALIGN(prom_memory_limit, 0x1000000);
826#endif
827 }
828
829#ifdef CONFIG_PPC_PSERIES
830 prom_radix_disable = !IS_ENABLED(CONFIG_PPC_RADIX_MMU_DEFAULT);
831 opt = prom_strstr(prom_cmd_line, "disable_radix");
832 if (opt) {
833 opt += 13;
834 if (*opt && *opt == '=') {
835 bool val;
836
837 if (prom_strtobool(++opt, &val))
838 prom_radix_disable = false;
839 else
840 prom_radix_disable = val;
841 } else
842 prom_radix_disable = true;
843 }
844 if (prom_radix_disable)
845 prom_debug("Radix disabled from cmdline\n");
846
847 opt = prom_strstr(prom_cmd_line, "radix_hcall_invalidate=on");
848 if (opt) {
849 prom_radix_gtse_disable = true;
850 prom_debug("Radix GTSE disabled from cmdline\n");
851 }
852
853 opt = prom_strstr(prom_cmd_line, "xive=off");
854 if (opt) {
855 prom_xive_disable = true;
856 prom_debug("XIVE disabled from cmdline\n");
857 }
858#endif /* CONFIG_PPC_PSERIES */
859
860#ifdef CONFIG_PPC_SVM
861 opt = prom_strstr(prom_cmd_line, "svm=");
862 if (opt) {
863 bool val;
864
865 opt += sizeof("svm=") - 1;
866 if (!prom_strtobool(opt, &val))
867 prom_svm_enable = val;
868 }
869#endif /* CONFIG_PPC_SVM */
870}
871
872#ifdef CONFIG_PPC_PSERIES
873/*
874 * The architecture vector has an array of PVR mask/value pairs,
875 * followed by # option vectors - 1, followed by the option vectors.
876 *
877 * See prom.h for the definition of the bits specified in the
878 * architecture vector.
879 */
880
881/* Firmware expects the value to be n - 1, where n is the # of vectors */
882#define NUM_VECTORS(n) ((n) - 1)
883
884/*
885 * Firmware expects 1 + n - 2, where n is the length of the option vector in
886 * bytes. The 1 accounts for the length byte itself, the - 2 .. ?
887 */
888#define VECTOR_LENGTH(n) (1 + (n) - 2)
889
890struct option_vector1 {
891 u8 byte1;
892 u8 arch_versions;
893 u8 arch_versions3;
894} __packed;
895
896struct option_vector2 {
897 u8 byte1;
898 __be16 reserved;
899 __be32 real_base;
900 __be32 real_size;
901 __be32 virt_base;
902 __be32 virt_size;
903 __be32 load_base;
904 __be32 min_rma;
905 __be32 min_load;
906 u8 min_rma_percent;
907 u8 max_pft_size;
908} __packed;
909
910struct option_vector3 {
911 u8 byte1;
912 u8 byte2;
913} __packed;
914
915struct option_vector4 {
916 u8 byte1;
917 u8 min_vp_cap;
918} __packed;
919
920struct option_vector5 {
921 u8 byte1;
922 u8 byte2;
923 u8 byte3;
924 u8 cmo;
925 u8 associativity;
926 u8 bin_opts;
927 u8 micro_checkpoint;
928 u8 reserved0;
929 __be32 max_cpus;
930 __be16 papr_level;
931 __be16 reserved1;
932 u8 platform_facilities;
933 u8 reserved2;
934 __be16 reserved3;
935 u8 subprocessors;
936 u8 byte22;
937 u8 intarch;
938 u8 mmu;
939 u8 hash_ext;
940 u8 radix_ext;
941} __packed;
942
943struct option_vector6 {
944 u8 reserved;
945 u8 secondary_pteg;
946 u8 os_name;
947} __packed;
948
949struct option_vector7 {
950 u8 os_id[256];
951} __packed;
952
953struct ibm_arch_vec {
954 struct { u32 mask, val; } pvrs[14];
955
956 u8 num_vectors;
957
958 u8 vec1_len;
959 struct option_vector1 vec1;
960
961 u8 vec2_len;
962 struct option_vector2 vec2;
963
964 u8 vec3_len;
965 struct option_vector3 vec3;
966
967 u8 vec4_len;
968 struct option_vector4 vec4;
969
970 u8 vec5_len;
971 struct option_vector5 vec5;
972
973 u8 vec6_len;
974 struct option_vector6 vec6;
975
976 u8 vec7_len;
977 struct option_vector7 vec7;
978} __packed;
979
980static const struct ibm_arch_vec ibm_architecture_vec_template __initconst = {
981 .pvrs = {
982 {
983 .mask = cpu_to_be32(0xfffe0000), /* POWER5/POWER5+ */
984 .val = cpu_to_be32(0x003a0000),
985 },
986 {
987 .mask = cpu_to_be32(0xffff0000), /* POWER6 */
988 .val = cpu_to_be32(0x003e0000),
989 },
990 {
991 .mask = cpu_to_be32(0xffff0000), /* POWER7 */
992 .val = cpu_to_be32(0x003f0000),
993 },
994 {
995 .mask = cpu_to_be32(0xffff0000), /* POWER8E */
996 .val = cpu_to_be32(0x004b0000),
997 },
998 {
999 .mask = cpu_to_be32(0xffff0000), /* POWER8NVL */
1000 .val = cpu_to_be32(0x004c0000),
1001 },
1002 {
1003 .mask = cpu_to_be32(0xffff0000), /* POWER8 */
1004 .val = cpu_to_be32(0x004d0000),
1005 },
1006 {
1007 .mask = cpu_to_be32(0xffff0000), /* POWER9 */
1008 .val = cpu_to_be32(0x004e0000),
1009 },
1010 {
1011 .mask = cpu_to_be32(0xffff0000), /* POWER10 */
1012 .val = cpu_to_be32(0x00800000),
1013 },
1014 {
1015 .mask = cpu_to_be32(0xffffffff), /* all 3.1-compliant */
1016 .val = cpu_to_be32(0x0f000006),
1017 },
1018 {
1019 .mask = cpu_to_be32(0xffffffff), /* all 3.00-compliant */
1020 .val = cpu_to_be32(0x0f000005),
1021 },
1022 {
1023 .mask = cpu_to_be32(0xffffffff), /* all 2.07-compliant */
1024 .val = cpu_to_be32(0x0f000004),
1025 },
1026 {
1027 .mask = cpu_to_be32(0xffffffff), /* all 2.06-compliant */
1028 .val = cpu_to_be32(0x0f000003),
1029 },
1030 {
1031 .mask = cpu_to_be32(0xffffffff), /* all 2.05-compliant */
1032 .val = cpu_to_be32(0x0f000002),
1033 },
1034 {
1035 .mask = cpu_to_be32(0xfffffffe), /* all 2.04-compliant and earlier */
1036 .val = cpu_to_be32(0x0f000001),
1037 },
1038 },
1039
1040 .num_vectors = NUM_VECTORS(6),
1041
1042 .vec1_len = VECTOR_LENGTH(sizeof(struct option_vector1)),
1043 .vec1 = {
1044 .byte1 = 0,
1045 .arch_versions = OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 |
1046 OV1_PPC_2_04 | OV1_PPC_2_05 | OV1_PPC_2_06 | OV1_PPC_2_07,
1047 .arch_versions3 = OV1_PPC_3_00 | OV1_PPC_3_1,
1048 },
1049
1050 .vec2_len = VECTOR_LENGTH(sizeof(struct option_vector2)),
1051 /* option vector 2: Open Firmware options supported */
1052 .vec2 = {
1053 .byte1 = OV2_REAL_MODE,
1054 .reserved = 0,
1055 .real_base = cpu_to_be32(0xffffffff),
1056 .real_size = cpu_to_be32(0xffffffff),
1057 .virt_base = cpu_to_be32(0xffffffff),
1058 .virt_size = cpu_to_be32(0xffffffff),
1059 .load_base = cpu_to_be32(0xffffffff),
1060 .min_rma = cpu_to_be32(512), /* 512MB min RMA */
1061 .min_load = cpu_to_be32(0xffffffff), /* full client load */
1062 .min_rma_percent = 0, /* min RMA percentage of total RAM */
1063 .max_pft_size = 48, /* max log_2(hash table size) */
1064 },
1065
1066 .vec3_len = VECTOR_LENGTH(sizeof(struct option_vector3)),
1067 /* option vector 3: processor options supported */
1068 .vec3 = {
1069 .byte1 = 0, /* don't ignore, don't halt */
1070 .byte2 = OV3_FP | OV3_VMX | OV3_DFP,
1071 },
1072
1073 .vec4_len = VECTOR_LENGTH(sizeof(struct option_vector4)),
1074 /* option vector 4: IBM PAPR implementation */
1075 .vec4 = {
1076 .byte1 = 0, /* don't halt */
1077 .min_vp_cap = OV4_MIN_ENT_CAP, /* minimum VP entitled capacity */
1078 },
1079
1080 .vec5_len = VECTOR_LENGTH(sizeof(struct option_vector5)),
1081 /* option vector 5: PAPR/OF options */
1082 .vec5 = {
1083 .byte1 = 0, /* don't ignore, don't halt */
1084 .byte2 = OV5_FEAT(OV5_LPAR) | OV5_FEAT(OV5_SPLPAR) | OV5_FEAT(OV5_LARGE_PAGES) |
1085 OV5_FEAT(OV5_DRCONF_MEMORY) | OV5_FEAT(OV5_DONATE_DEDICATE_CPU) |
1086#ifdef CONFIG_PCI_MSI
1087 /* PCIe/MSI support. Without MSI full PCIe is not supported */
1088 OV5_FEAT(OV5_MSI),
1089#else
1090 0,
1091#endif
1092 .byte3 = 0,
1093 .cmo =
1094#ifdef CONFIG_PPC_SMLPAR
1095 OV5_FEAT(OV5_CMO) | OV5_FEAT(OV5_XCMO),
1096#else
1097 0,
1098#endif
1099 .associativity = OV5_FEAT(OV5_TYPE1_AFFINITY) | OV5_FEAT(OV5_PRRN),
1100 .bin_opts = OV5_FEAT(OV5_RESIZE_HPT) | OV5_FEAT(OV5_HP_EVT),
1101 .micro_checkpoint = 0,
1102 .reserved0 = 0,
1103 .max_cpus = cpu_to_be32(NR_CPUS), /* number of cores supported */
1104 .papr_level = 0,
1105 .reserved1 = 0,
1106 .platform_facilities = OV5_FEAT(OV5_PFO_HW_RNG) | OV5_FEAT(OV5_PFO_HW_ENCR) | OV5_FEAT(OV5_PFO_HW_842),
1107 .reserved2 = 0,
1108 .reserved3 = 0,
1109 .subprocessors = 1,
1110 .byte22 = OV5_FEAT(OV5_DRMEM_V2) | OV5_FEAT(OV5_DRC_INFO),
1111 .intarch = 0,
1112 .mmu = 0,
1113 .hash_ext = 0,
1114 .radix_ext = 0,
1115 },
1116
1117 /* option vector 6: IBM PAPR hints */
1118 .vec6_len = VECTOR_LENGTH(sizeof(struct option_vector6)),
1119 .vec6 = {
1120 .reserved = 0,
1121 .secondary_pteg = 0,
1122 .os_name = OV6_LINUX,
1123 },
1124
1125 /* option vector 7: OS Identification */
1126 .vec7_len = VECTOR_LENGTH(sizeof(struct option_vector7)),
1127};
1128
1129static struct ibm_arch_vec __prombss ibm_architecture_vec ____cacheline_aligned;
1130
1131/* Old method - ELF header with PT_NOTE sections only works on BE */
1132#ifdef __BIG_ENDIAN__
1133static const struct fake_elf {
1134 Elf32_Ehdr elfhdr;
1135 Elf32_Phdr phdr[2];
1136 struct chrpnote {
1137 u32 namesz;
1138 u32 descsz;
1139 u32 type;
1140 char name[8]; /* "PowerPC" */
1141 struct chrpdesc {
1142 u32 real_mode;
1143 u32 real_base;
1144 u32 real_size;
1145 u32 virt_base;
1146 u32 virt_size;
1147 u32 load_base;
1148 } chrpdesc;
1149 } chrpnote;
1150 struct rpanote {
1151 u32 namesz;
1152 u32 descsz;
1153 u32 type;
1154 char name[24]; /* "IBM,RPA-Client-Config" */
1155 struct rpadesc {
1156 u32 lpar_affinity;
1157 u32 min_rmo_size;
1158 u32 min_rmo_percent;
1159 u32 max_pft_size;
1160 u32 splpar;
1161 u32 min_load;
1162 u32 new_mem_def;
1163 u32 ignore_me;
1164 } rpadesc;
1165 } rpanote;
1166} fake_elf __initconst = {
1167 .elfhdr = {
1168 .e_ident = { 0x7f, 'E', 'L', 'F',
1169 ELFCLASS32, ELFDATA2MSB, EV_CURRENT },
1170 .e_type = ET_EXEC, /* yeah right */
1171 .e_machine = EM_PPC,
1172 .e_version = EV_CURRENT,
1173 .e_phoff = offsetof(struct fake_elf, phdr),
1174 .e_phentsize = sizeof(Elf32_Phdr),
1175 .e_phnum = 2
1176 },
1177 .phdr = {
1178 [0] = {
1179 .p_type = PT_NOTE,
1180 .p_offset = offsetof(struct fake_elf, chrpnote),
1181 .p_filesz = sizeof(struct chrpnote)
1182 }, [1] = {
1183 .p_type = PT_NOTE,
1184 .p_offset = offsetof(struct fake_elf, rpanote),
1185 .p_filesz = sizeof(struct rpanote)
1186 }
1187 },
1188 .chrpnote = {
1189 .namesz = sizeof("PowerPC"),
1190 .descsz = sizeof(struct chrpdesc),
1191 .type = 0x1275,
1192 .name = "PowerPC",
1193 .chrpdesc = {
1194 .real_mode = ~0U, /* ~0 means "don't care" */
1195 .real_base = ~0U,
1196 .real_size = ~0U,
1197 .virt_base = ~0U,
1198 .virt_size = ~0U,
1199 .load_base = ~0U
1200 },
1201 },
1202 .rpanote = {
1203 .namesz = sizeof("IBM,RPA-Client-Config"),
1204 .descsz = sizeof(struct rpadesc),
1205 .type = 0x12759999,
1206 .name = "IBM,RPA-Client-Config",
1207 .rpadesc = {
1208 .lpar_affinity = 0,
1209 .min_rmo_size = 64, /* in megabytes */
1210 .min_rmo_percent = 0,
1211 .max_pft_size = 48, /* 2^48 bytes max PFT size */
1212 .splpar = 1,
1213 .min_load = ~0U,
1214 .new_mem_def = 0
1215 }
1216 }
1217};
1218#endif /* __BIG_ENDIAN__ */
1219
1220static int __init prom_count_smt_threads(void)
1221{
1222 phandle node;
1223 char type[64];
1224 unsigned int plen;
1225
1226 /* Pick up th first CPU node we can find */
1227 for (node = 0; prom_next_node(&node); ) {
1228 type[0] = 0;
1229 prom_getprop(node, "device_type", type, sizeof(type));
1230
1231 if (prom_strcmp(type, "cpu"))
1232 continue;
1233 /*
1234 * There is an entry for each smt thread, each entry being
1235 * 4 bytes long. All cpus should have the same number of
1236 * smt threads, so return after finding the first.
1237 */
1238 plen = prom_getproplen(node, "ibm,ppc-interrupt-server#s");
1239 if (plen == PROM_ERROR)
1240 break;
1241 plen >>= 2;
1242 prom_debug("Found %lu smt threads per core\n", (unsigned long)plen);
1243
1244 /* Sanity check */
1245 if (plen < 1 || plen > 64) {
1246 prom_printf("Threads per core %lu out of bounds, assuming 1\n",
1247 (unsigned long)plen);
1248 return 1;
1249 }
1250 return plen;
1251 }
1252 prom_debug("No threads found, assuming 1 per core\n");
1253
1254 return 1;
1255
1256}
1257
1258static void __init prom_parse_mmu_model(u8 val,
1259 struct platform_support *support)
1260{
1261 switch (val) {
1262 case OV5_FEAT(OV5_MMU_DYNAMIC):
1263 case OV5_FEAT(OV5_MMU_EITHER): /* Either Available */
1264 prom_debug("MMU - either supported\n");
1265 support->radix_mmu = !prom_radix_disable;
1266 support->hash_mmu = true;
1267 break;
1268 case OV5_FEAT(OV5_MMU_RADIX): /* Only Radix */
1269 prom_debug("MMU - radix only\n");
1270 if (prom_radix_disable) {
1271 /*
1272 * If we __have__ to do radix, we're better off ignoring
1273 * the command line rather than not booting.
1274 */
1275 prom_printf("WARNING: Ignoring cmdline option disable_radix\n");
1276 }
1277 support->radix_mmu = true;
1278 break;
1279 case OV5_FEAT(OV5_MMU_HASH):
1280 prom_debug("MMU - hash only\n");
1281 support->hash_mmu = true;
1282 break;
1283 default:
1284 prom_debug("Unknown mmu support option: 0x%x\n", val);
1285 break;
1286 }
1287}
1288
1289static void __init prom_parse_xive_model(u8 val,
1290 struct platform_support *support)
1291{
1292 switch (val) {
1293 case OV5_FEAT(OV5_XIVE_EITHER): /* Either Available */
1294 prom_debug("XIVE - either mode supported\n");
1295 support->xive = !prom_xive_disable;
1296 break;
1297 case OV5_FEAT(OV5_XIVE_EXPLOIT): /* Only Exploitation mode */
1298 prom_debug("XIVE - exploitation mode supported\n");
1299 if (prom_xive_disable) {
1300 /*
1301 * If we __have__ to do XIVE, we're better off ignoring
1302 * the command line rather than not booting.
1303 */
1304 prom_printf("WARNING: Ignoring cmdline option xive=off\n");
1305 }
1306 support->xive = true;
1307 break;
1308 case OV5_FEAT(OV5_XIVE_LEGACY): /* Only Legacy mode */
1309 prom_debug("XIVE - legacy mode supported\n");
1310 break;
1311 default:
1312 prom_debug("Unknown xive support option: 0x%x\n", val);
1313 break;
1314 }
1315}
1316
1317static void __init prom_parse_platform_support(u8 index, u8 val,
1318 struct platform_support *support)
1319{
1320 switch (index) {
1321 case OV5_INDX(OV5_MMU_SUPPORT): /* MMU Model */
1322 prom_parse_mmu_model(val & OV5_FEAT(OV5_MMU_SUPPORT), support);
1323 break;
1324 case OV5_INDX(OV5_RADIX_GTSE): /* Radix Extensions */
1325 if (val & OV5_FEAT(OV5_RADIX_GTSE))
1326 support->radix_gtse = !prom_radix_gtse_disable;
1327 break;
1328 case OV5_INDX(OV5_XIVE_SUPPORT): /* Interrupt mode */
1329 prom_parse_xive_model(val & OV5_FEAT(OV5_XIVE_SUPPORT),
1330 support);
1331 break;
1332 }
1333}
1334
1335static void __init prom_check_platform_support(void)
1336{
1337 struct platform_support supported = {
1338 .hash_mmu = false,
1339 .radix_mmu = false,
1340 .radix_gtse = false,
1341 .xive = false
1342 };
1343 int prop_len = prom_getproplen(prom.chosen,
1344 "ibm,arch-vec-5-platform-support");
1345
1346 /*
1347 * First copy the architecture vec template
1348 *
1349 * use memcpy() instead of *vec = *vec_template so that GCC replaces it
1350 * by __memcpy() when KASAN is active
1351 */
1352 memcpy(&ibm_architecture_vec, &ibm_architecture_vec_template,
1353 sizeof(ibm_architecture_vec));
1354
1355 prom_strscpy_pad(ibm_architecture_vec.vec7.os_id, linux_banner, 256);
1356
1357 if (prop_len > 1) {
1358 int i;
1359 u8 vec[8];
1360 prom_debug("Found ibm,arch-vec-5-platform-support, len: %d\n",
1361 prop_len);
1362 if (prop_len > sizeof(vec))
1363 prom_printf("WARNING: ibm,arch-vec-5-platform-support longer than expected (len: %d)\n",
1364 prop_len);
1365 prom_getprop(prom.chosen, "ibm,arch-vec-5-platform-support", &vec, sizeof(vec));
1366 for (i = 0; i < prop_len; i += 2) {
1367 prom_debug("%d: index = 0x%x val = 0x%x\n", i / 2, vec[i], vec[i + 1]);
1368 prom_parse_platform_support(vec[i], vec[i + 1], &supported);
1369 }
1370 }
1371
1372 if (supported.radix_mmu && IS_ENABLED(CONFIG_PPC_RADIX_MMU)) {
1373 /* Radix preferred - Check if GTSE is also supported */
1374 prom_debug("Asking for radix\n");
1375 ibm_architecture_vec.vec5.mmu = OV5_FEAT(OV5_MMU_RADIX);
1376 if (supported.radix_gtse)
1377 ibm_architecture_vec.vec5.radix_ext =
1378 OV5_FEAT(OV5_RADIX_GTSE);
1379 else
1380 prom_debug("Radix GTSE isn't supported\n");
1381 } else if (supported.hash_mmu) {
1382 /* Default to hash mmu (if we can) */
1383 prom_debug("Asking for hash\n");
1384 ibm_architecture_vec.vec5.mmu = OV5_FEAT(OV5_MMU_HASH);
1385 } else {
1386 /* We're probably on a legacy hypervisor */
1387 prom_debug("Assuming legacy hash support\n");
1388 }
1389
1390 if (supported.xive) {
1391 prom_debug("Asking for XIVE\n");
1392 ibm_architecture_vec.vec5.intarch = OV5_FEAT(OV5_XIVE_EXPLOIT);
1393 }
1394}
1395
1396static void __init prom_send_capabilities(void)
1397{
1398 ihandle root;
1399 prom_arg_t ret;
1400 u32 cores;
1401
1402 /* Check ibm,arch-vec-5-platform-support and fixup vec5 if required */
1403 prom_check_platform_support();
1404
1405 root = call_prom("open", 1, 1, ADDR("/"));
1406 if (root != 0) {
1407 /* We need to tell the FW about the number of cores we support.
1408 *
1409 * To do that, we count the number of threads on the first core
1410 * (we assume this is the same for all cores) and use it to
1411 * divide NR_CPUS.
1412 */
1413
1414 cores = DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads());
1415 prom_printf("Max number of cores passed to firmware: %u (NR_CPUS = %d)\n",
1416 cores, NR_CPUS);
1417
1418 ibm_architecture_vec.vec5.max_cpus = cpu_to_be32(cores);
1419
1420 /* try calling the ibm,client-architecture-support method */
1421 prom_printf("Calling ibm,client-architecture-support...");
1422 if (call_prom_ret("call-method", 3, 2, &ret,
1423 ADDR("ibm,client-architecture-support"),
1424 root,
1425 ADDR(&ibm_architecture_vec)) == 0) {
1426 /* the call exists... */
1427 if (ret)
1428 prom_printf("\nWARNING: ibm,client-architecture"
1429 "-support call FAILED!\n");
1430 call_prom("close", 1, 0, root);
1431 prom_printf(" done\n");
1432 return;
1433 }
1434 call_prom("close", 1, 0, root);
1435 prom_printf(" not implemented\n");
1436 }
1437
1438#ifdef __BIG_ENDIAN__
1439 {
1440 ihandle elfloader;
1441
1442 /* no ibm,client-architecture-support call, try the old way */
1443 elfloader = call_prom("open", 1, 1,
1444 ADDR("/packages/elf-loader"));
1445 if (elfloader == 0) {
1446 prom_printf("couldn't open /packages/elf-loader\n");
1447 return;
1448 }
1449 call_prom("call-method", 3, 1, ADDR("process-elf-header"),
1450 elfloader, ADDR(&fake_elf));
1451 call_prom("close", 1, 0, elfloader);
1452 }
1453#endif /* __BIG_ENDIAN__ */
1454}
1455#endif /* CONFIG_PPC_PSERIES */
1456
1457/*
1458 * Memory allocation strategy... our layout is normally:
1459 *
1460 * at 14Mb or more we have vmlinux, then a gap and initrd. In some
1461 * rare cases, initrd might end up being before the kernel though.
1462 * We assume this won't override the final kernel at 0, we have no
1463 * provision to handle that in this version, but it should hopefully
1464 * never happen.
1465 *
1466 * alloc_top is set to the top of RMO, eventually shrink down if the
1467 * TCEs overlap
1468 *
1469 * alloc_bottom is set to the top of kernel/initrd
1470 *
1471 * from there, allocations are done this way : rtas is allocated
1472 * topmost, and the device-tree is allocated from the bottom. We try
1473 * to grow the device-tree allocation as we progress. If we can't,
1474 * then we fail, we don't currently have a facility to restart
1475 * elsewhere, but that shouldn't be necessary.
1476 *
1477 * Note that calls to reserve_mem have to be done explicitly, memory
1478 * allocated with either alloc_up or alloc_down isn't automatically
1479 * reserved.
1480 */
1481
1482
1483/*
1484 * Allocates memory in the RMO upward from the kernel/initrd
1485 *
1486 * When align is 0, this is a special case, it means to allocate in place
1487 * at the current location of alloc_bottom or fail (that is basically
1488 * extending the previous allocation). Used for the device-tree flattening
1489 */
1490static unsigned long __init alloc_up(unsigned long size, unsigned long align)
1491{
1492 unsigned long base = alloc_bottom;
1493 unsigned long addr = 0;
1494
1495 if (align)
1496 base = ALIGN(base, align);
1497 prom_debug("%s(%lx, %lx)\n", __func__, size, align);
1498 if (ram_top == 0)
1499 prom_panic("alloc_up() called with mem not initialized\n");
1500
1501 if (align)
1502 base = ALIGN(alloc_bottom, align);
1503 else
1504 base = alloc_bottom;
1505
1506 for(; (base + size) <= alloc_top;
1507 base = ALIGN(base + 0x100000, align)) {
1508 prom_debug(" trying: 0x%lx\n\r", base);
1509 addr = (unsigned long)prom_claim(base, size, 0);
1510 if (addr != PROM_ERROR && addr != 0)
1511 break;
1512 addr = 0;
1513 if (align == 0)
1514 break;
1515 }
1516 if (addr == 0)
1517 return 0;
1518 alloc_bottom = addr + size;
1519
1520 prom_debug(" -> %lx\n", addr);
1521 prom_debug(" alloc_bottom : %lx\n", alloc_bottom);
1522 prom_debug(" alloc_top : %lx\n", alloc_top);
1523 prom_debug(" alloc_top_hi : %lx\n", alloc_top_high);
1524 prom_debug(" rmo_top : %lx\n", rmo_top);
1525 prom_debug(" ram_top : %lx\n", ram_top);
1526
1527 return addr;
1528}
1529
1530/*
1531 * Allocates memory downward, either from top of RMO, or if highmem
1532 * is set, from the top of RAM. Note that this one doesn't handle
1533 * failures. It does claim memory if highmem is not set.
1534 */
1535static unsigned long __init alloc_down(unsigned long size, unsigned long align,
1536 int highmem)
1537{
1538 unsigned long base, addr = 0;
1539
1540 prom_debug("%s(%lx, %lx, %s)\n", __func__, size, align,
1541 highmem ? "(high)" : "(low)");
1542 if (ram_top == 0)
1543 prom_panic("alloc_down() called with mem not initialized\n");
1544
1545 if (highmem) {
1546 /* Carve out storage for the TCE table. */
1547 addr = ALIGN_DOWN(alloc_top_high - size, align);
1548 if (addr <= alloc_bottom)
1549 return 0;
1550 /* Will we bump into the RMO ? If yes, check out that we
1551 * didn't overlap existing allocations there, if we did,
1552 * we are dead, we must be the first in town !
1553 */
1554 if (addr < rmo_top) {
1555 /* Good, we are first */
1556 if (alloc_top == rmo_top)
1557 alloc_top = rmo_top = addr;
1558 else
1559 return 0;
1560 }
1561 alloc_top_high = addr;
1562 goto bail;
1563 }
1564
1565 base = ALIGN_DOWN(alloc_top - size, align);
1566 for (; base > alloc_bottom;
1567 base = ALIGN_DOWN(base - 0x100000, align)) {
1568 prom_debug(" trying: 0x%lx\n\r", base);
1569 addr = (unsigned long)prom_claim(base, size, 0);
1570 if (addr != PROM_ERROR && addr != 0)
1571 break;
1572 addr = 0;
1573 }
1574 if (addr == 0)
1575 return 0;
1576 alloc_top = addr;
1577
1578 bail:
1579 prom_debug(" -> %lx\n", addr);
1580 prom_debug(" alloc_bottom : %lx\n", alloc_bottom);
1581 prom_debug(" alloc_top : %lx\n", alloc_top);
1582 prom_debug(" alloc_top_hi : %lx\n", alloc_top_high);
1583 prom_debug(" rmo_top : %lx\n", rmo_top);
1584 prom_debug(" ram_top : %lx\n", ram_top);
1585
1586 return addr;
1587}
1588
1589/*
1590 * Parse a "reg" cell
1591 */
1592static unsigned long __init prom_next_cell(int s, cell_t **cellp)
1593{
1594 cell_t *p = *cellp;
1595 unsigned long r = 0;
1596
1597 /* Ignore more than 2 cells */
1598 while (s > sizeof(unsigned long) / 4) {
1599 p++;
1600 s--;
1601 }
1602 r = be32_to_cpu(*p++);
1603#ifdef CONFIG_PPC64
1604 if (s > 1) {
1605 r <<= 32;
1606 r |= be32_to_cpu(*(p++));
1607 }
1608#endif
1609 *cellp = p;
1610 return r;
1611}
1612
1613/*
1614 * Very dumb function for adding to the memory reserve list, but
1615 * we don't need anything smarter at this point
1616 *
1617 * XXX Eventually check for collisions. They should NEVER happen.
1618 * If problems seem to show up, it would be a good start to track
1619 * them down.
1620 */
1621static void __init reserve_mem(u64 base, u64 size)
1622{
1623 u64 top = base + size;
1624 unsigned long cnt = mem_reserve_cnt;
1625
1626 if (size == 0)
1627 return;
1628
1629 /* We need to always keep one empty entry so that we
1630 * have our terminator with "size" set to 0 since we are
1631 * dumb and just copy this entire array to the boot params
1632 */
1633 base = ALIGN_DOWN(base, PAGE_SIZE);
1634 top = ALIGN(top, PAGE_SIZE);
1635 size = top - base;
1636
1637 if (cnt >= (MEM_RESERVE_MAP_SIZE - 1))
1638 prom_panic("Memory reserve map exhausted !\n");
1639 mem_reserve_map[cnt].base = cpu_to_be64(base);
1640 mem_reserve_map[cnt].size = cpu_to_be64(size);
1641 mem_reserve_cnt = cnt + 1;
1642}
1643
1644/*
1645 * Initialize memory allocation mechanism, parse "memory" nodes and
1646 * obtain that way the top of memory and RMO to setup out local allocator
1647 */
1648static void __init prom_init_mem(void)
1649{
1650 phandle node;
1651 char type[64];
1652 unsigned int plen;
1653 cell_t *p, *endp;
1654 __be32 val;
1655 u32 rac, rsc;
1656
1657 /*
1658 * We iterate the memory nodes to find
1659 * 1) top of RMO (first node)
1660 * 2) top of memory
1661 */
1662 val = cpu_to_be32(2);
1663 prom_getprop(prom.root, "#address-cells", &val, sizeof(val));
1664 rac = be32_to_cpu(val);
1665 val = cpu_to_be32(1);
1666 prom_getprop(prom.root, "#size-cells", &val, sizeof(rsc));
1667 rsc = be32_to_cpu(val);
1668 prom_debug("root_addr_cells: %x\n", rac);
1669 prom_debug("root_size_cells: %x\n", rsc);
1670
1671 prom_debug("scanning memory:\n");
1672
1673 for (node = 0; prom_next_node(&node); ) {
1674 type[0] = 0;
1675 prom_getprop(node, "device_type", type, sizeof(type));
1676
1677 if (type[0] == 0) {
1678 /*
1679 * CHRP Longtrail machines have no device_type
1680 * on the memory node, so check the name instead...
1681 */
1682 prom_getprop(node, "name", type, sizeof(type));
1683 }
1684 if (prom_strcmp(type, "memory"))
1685 continue;
1686
1687 plen = prom_getprop(node, "reg", regbuf, sizeof(regbuf));
1688 if (plen > sizeof(regbuf)) {
1689 prom_printf("memory node too large for buffer !\n");
1690 plen = sizeof(regbuf);
1691 }
1692 p = regbuf;
1693 endp = p + (plen / sizeof(cell_t));
1694
1695#ifdef DEBUG_PROM
1696 memset(prom_scratch, 0, sizeof(prom_scratch));
1697 call_prom("package-to-path", 3, 1, node, prom_scratch,
1698 sizeof(prom_scratch) - 1);
1699 prom_debug(" node %s :\n", prom_scratch);
1700#endif /* DEBUG_PROM */
1701
1702 while ((endp - p) >= (rac + rsc)) {
1703 unsigned long base, size;
1704
1705 base = prom_next_cell(rac, &p);
1706 size = prom_next_cell(rsc, &p);
1707
1708 if (size == 0)
1709 continue;
1710 prom_debug(" %lx %lx\n", base, size);
1711 if (base == 0 && (of_platform & PLATFORM_LPAR))
1712 rmo_top = size;
1713 if ((base + size) > ram_top)
1714 ram_top = base + size;
1715 }
1716 }
1717
1718 alloc_bottom = PAGE_ALIGN((unsigned long)&_end + 0x4000);
1719
1720 /*
1721 * If prom_memory_limit is set we reduce the upper limits *except* for
1722 * alloc_top_high. This must be the real top of RAM so we can put
1723 * TCE's up there.
1724 */
1725
1726 alloc_top_high = ram_top;
1727
1728 if (prom_memory_limit) {
1729 if (prom_memory_limit <= alloc_bottom) {
1730 prom_printf("Ignoring mem=%lx <= alloc_bottom.\n",
1731 prom_memory_limit);
1732 prom_memory_limit = 0;
1733 } else if (prom_memory_limit >= ram_top) {
1734 prom_printf("Ignoring mem=%lx >= ram_top.\n",
1735 prom_memory_limit);
1736 prom_memory_limit = 0;
1737 } else {
1738 ram_top = prom_memory_limit;
1739 rmo_top = min(rmo_top, prom_memory_limit);
1740 }
1741 }
1742
1743 /*
1744 * Setup our top alloc point, that is top of RMO or top of
1745 * segment 0 when running non-LPAR.
1746 * Some RS64 machines have buggy firmware where claims up at
1747 * 1GB fail. Cap at 768MB as a workaround.
1748 * Since 768MB is plenty of room, and we need to cap to something
1749 * reasonable on 32-bit, cap at 768MB on all machines.
1750 */
1751 if (!rmo_top)
1752 rmo_top = ram_top;
1753 rmo_top = min(0x30000000ul, rmo_top);
1754 alloc_top = rmo_top;
1755 alloc_top_high = ram_top;
1756
1757 /*
1758 * Check if we have an initrd after the kernel but still inside
1759 * the RMO. If we do move our bottom point to after it.
1760 */
1761 if (prom_initrd_start &&
1762 prom_initrd_start < rmo_top &&
1763 prom_initrd_end > alloc_bottom)
1764 alloc_bottom = PAGE_ALIGN(prom_initrd_end);
1765
1766 prom_printf("memory layout at init:\n");
1767 prom_printf(" memory_limit : %lx (16 MB aligned)\n",
1768 prom_memory_limit);
1769 prom_printf(" alloc_bottom : %lx\n", alloc_bottom);
1770 prom_printf(" alloc_top : %lx\n", alloc_top);
1771 prom_printf(" alloc_top_hi : %lx\n", alloc_top_high);
1772 prom_printf(" rmo_top : %lx\n", rmo_top);
1773 prom_printf(" ram_top : %lx\n", ram_top);
1774}
1775
1776static void __init prom_close_stdin(void)
1777{
1778 __be32 val;
1779 ihandle stdin;
1780
1781 if (prom_getprop(prom.chosen, "stdin", &val, sizeof(val)) > 0) {
1782 stdin = be32_to_cpu(val);
1783 call_prom("close", 1, 0, stdin);
1784 }
1785}
1786
1787#ifdef CONFIG_PPC_SVM
1788static int prom_rtas_hcall(uint64_t args)
1789{
1790 register uint64_t arg1 asm("r3") = H_RTAS;
1791 register uint64_t arg2 asm("r4") = args;
1792
1793 asm volatile("sc 1\n" : "=r" (arg1) :
1794 "r" (arg1),
1795 "r" (arg2) :);
1796 srr_regs_clobbered();
1797
1798 return arg1;
1799}
1800
1801static struct rtas_args __prombss os_term_args;
1802
1803static void __init prom_rtas_os_term(char *str)
1804{
1805 phandle rtas_node;
1806 __be32 val;
1807 u32 token;
1808
1809 prom_debug("%s: start...\n", __func__);
1810 rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
1811 prom_debug("rtas_node: %x\n", rtas_node);
1812 if (!PHANDLE_VALID(rtas_node))
1813 return;
1814
1815 val = 0;
1816 prom_getprop(rtas_node, "ibm,os-term", &val, sizeof(val));
1817 token = be32_to_cpu(val);
1818 prom_debug("ibm,os-term: %x\n", token);
1819 if (token == 0)
1820 prom_panic("Could not get token for ibm,os-term\n");
1821 os_term_args.token = cpu_to_be32(token);
1822 os_term_args.nargs = cpu_to_be32(1);
1823 os_term_args.nret = cpu_to_be32(1);
1824 os_term_args.args[0] = cpu_to_be32(__pa(str));
1825 prom_rtas_hcall((uint64_t)&os_term_args);
1826}
1827#endif /* CONFIG_PPC_SVM */
1828
1829/*
1830 * Allocate room for and instantiate RTAS
1831 */
1832static void __init prom_instantiate_rtas(void)
1833{
1834 phandle rtas_node;
1835 ihandle rtas_inst;
1836 u32 base, entry = 0;
1837 __be32 val;
1838 u32 size = 0;
1839
1840 prom_debug("prom_instantiate_rtas: start...\n");
1841
1842 rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
1843 prom_debug("rtas_node: %x\n", rtas_node);
1844 if (!PHANDLE_VALID(rtas_node))
1845 return;
1846
1847 val = 0;
1848 prom_getprop(rtas_node, "rtas-size", &val, sizeof(size));
1849 size = be32_to_cpu(val);
1850 if (size == 0)
1851 return;
1852
1853 base = alloc_down(size, PAGE_SIZE, 0);
1854 if (base == 0)
1855 prom_panic("Could not allocate memory for RTAS\n");
1856
1857 rtas_inst = call_prom("open", 1, 1, ADDR("/rtas"));
1858 if (!IHANDLE_VALID(rtas_inst)) {
1859 prom_printf("opening rtas package failed (%x)\n", rtas_inst);
1860 return;
1861 }
1862
1863 prom_printf("instantiating rtas at 0x%x...", base);
1864
1865 if (call_prom_ret("call-method", 3, 2, &entry,
1866 ADDR("instantiate-rtas"),
1867 rtas_inst, base) != 0
1868 || entry == 0) {
1869 prom_printf(" failed\n");
1870 return;
1871 }
1872 prom_printf(" done\n");
1873
1874 reserve_mem(base, size);
1875
1876 val = cpu_to_be32(base);
1877 prom_setprop(rtas_node, "/rtas", "linux,rtas-base",
1878 &val, sizeof(val));
1879 val = cpu_to_be32(entry);
1880 prom_setprop(rtas_node, "/rtas", "linux,rtas-entry",
1881 &val, sizeof(val));
1882
1883 /* Check if it supports "query-cpu-stopped-state" */
1884 if (prom_getprop(rtas_node, "query-cpu-stopped-state",
1885 &val, sizeof(val)) != PROM_ERROR)
1886 rtas_has_query_cpu_stopped = true;
1887
1888 prom_debug("rtas base = 0x%x\n", base);
1889 prom_debug("rtas entry = 0x%x\n", entry);
1890 prom_debug("rtas size = 0x%x\n", size);
1891
1892 prom_debug("prom_instantiate_rtas: end...\n");
1893}
1894
1895#ifdef CONFIG_PPC64
1896/*
1897 * Allocate room for and instantiate Stored Measurement Log (SML)
1898 */
1899static void __init prom_instantiate_sml(void)
1900{
1901 phandle ibmvtpm_node;
1902 ihandle ibmvtpm_inst;
1903 u32 entry = 0, size = 0, succ = 0;
1904 u64 base;
1905 __be32 val;
1906
1907 prom_debug("prom_instantiate_sml: start...\n");
1908
1909 ibmvtpm_node = call_prom("finddevice", 1, 1, ADDR("/vdevice/vtpm"));
1910 prom_debug("ibmvtpm_node: %x\n", ibmvtpm_node);
1911 if (!PHANDLE_VALID(ibmvtpm_node))
1912 return;
1913
1914 ibmvtpm_inst = call_prom("open", 1, 1, ADDR("/vdevice/vtpm"));
1915 if (!IHANDLE_VALID(ibmvtpm_inst)) {
1916 prom_printf("opening vtpm package failed (%x)\n", ibmvtpm_inst);
1917 return;
1918 }
1919
1920 if (prom_getprop(ibmvtpm_node, "ibm,sml-efi-reformat-supported",
1921 &val, sizeof(val)) != PROM_ERROR) {
1922 if (call_prom_ret("call-method", 2, 2, &succ,
1923 ADDR("reformat-sml-to-efi-alignment"),
1924 ibmvtpm_inst) != 0 || succ == 0) {
1925 prom_printf("Reformat SML to EFI alignment failed\n");
1926 return;
1927 }
1928
1929 if (call_prom_ret("call-method", 2, 2, &size,
1930 ADDR("sml-get-allocated-size"),
1931 ibmvtpm_inst) != 0 || size == 0) {
1932 prom_printf("SML get allocated size failed\n");
1933 return;
1934 }
1935 } else {
1936 if (call_prom_ret("call-method", 2, 2, &size,
1937 ADDR("sml-get-handover-size"),
1938 ibmvtpm_inst) != 0 || size == 0) {
1939 prom_printf("SML get handover size failed\n");
1940 return;
1941 }
1942 }
1943
1944 base = alloc_down(size, PAGE_SIZE, 0);
1945 if (base == 0)
1946 prom_panic("Could not allocate memory for sml\n");
1947
1948 prom_printf("instantiating sml at 0x%llx...", base);
1949
1950 memset((void *)base, 0, size);
1951
1952 if (call_prom_ret("call-method", 4, 2, &entry,
1953 ADDR("sml-handover"),
1954 ibmvtpm_inst, size, base) != 0 || entry == 0) {
1955 prom_printf("SML handover failed\n");
1956 return;
1957 }
1958 prom_printf(" done\n");
1959
1960 reserve_mem(base, size);
1961
1962 prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-base",
1963 &base, sizeof(base));
1964 prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-size",
1965 &size, sizeof(size));
1966
1967 prom_debug("sml base = 0x%llx\n", base);
1968 prom_debug("sml size = 0x%x\n", size);
1969
1970 prom_debug("prom_instantiate_sml: end...\n");
1971}
1972
1973/*
1974 * Allocate room for and initialize TCE tables
1975 */
1976#ifdef __BIG_ENDIAN__
1977static void __init prom_initialize_tce_table(void)
1978{
1979 phandle node;
1980 ihandle phb_node;
1981 char compatible[64], type[64], model[64];
1982 char *path = prom_scratch;
1983 u64 base, align;
1984 u32 minalign, minsize;
1985 u64 tce_entry, *tce_entryp;
1986 u64 local_alloc_top, local_alloc_bottom;
1987 u64 i;
1988
1989 if (prom_iommu_off)
1990 return;
1991
1992 prom_debug("starting prom_initialize_tce_table\n");
1993
1994 /* Cache current top of allocs so we reserve a single block */
1995 local_alloc_top = alloc_top_high;
1996 local_alloc_bottom = local_alloc_top;
1997
1998 /* Search all nodes looking for PHBs. */
1999 for (node = 0; prom_next_node(&node); ) {
2000 compatible[0] = 0;
2001 type[0] = 0;
2002 model[0] = 0;
2003 prom_getprop(node, "compatible",
2004 compatible, sizeof(compatible));
2005 prom_getprop(node, "device_type", type, sizeof(type));
2006 prom_getprop(node, "model", model, sizeof(model));
2007
2008 if ((type[0] == 0) || (prom_strstr(type, "pci") == NULL))
2009 continue;
2010
2011 /* Keep the old logic intact to avoid regression. */
2012 if (compatible[0] != 0) {
2013 if ((prom_strstr(compatible, "python") == NULL) &&
2014 (prom_strstr(compatible, "Speedwagon") == NULL) &&
2015 (prom_strstr(compatible, "Winnipeg") == NULL))
2016 continue;
2017 } else if (model[0] != 0) {
2018 if ((prom_strstr(model, "ython") == NULL) &&
2019 (prom_strstr(model, "peedwagon") == NULL) &&
2020 (prom_strstr(model, "innipeg") == NULL))
2021 continue;
2022 }
2023
2024 if (prom_getprop(node, "tce-table-minalign", &minalign,
2025 sizeof(minalign)) == PROM_ERROR)
2026 minalign = 0;
2027 if (prom_getprop(node, "tce-table-minsize", &minsize,
2028 sizeof(minsize)) == PROM_ERROR)
2029 minsize = 4UL << 20;
2030
2031 /*
2032 * Even though we read what OF wants, we just set the table
2033 * size to 4 MB. This is enough to map 2GB of PCI DMA space.
2034 * By doing this, we avoid the pitfalls of trying to DMA to
2035 * MMIO space and the DMA alias hole.
2036 */
2037 minsize = 4UL << 20;
2038
2039 /* Align to the greater of the align or size */
2040 align = max(minalign, minsize);
2041 base = alloc_down(minsize, align, 1);
2042 if (base == 0)
2043 prom_panic("ERROR, cannot find space for TCE table.\n");
2044 if (base < local_alloc_bottom)
2045 local_alloc_bottom = base;
2046
2047 /* It seems OF doesn't null-terminate the path :-( */
2048 memset(path, 0, sizeof(prom_scratch));
2049 /* Call OF to setup the TCE hardware */
2050 if (call_prom("package-to-path", 3, 1, node,
2051 path, sizeof(prom_scratch) - 1) == PROM_ERROR) {
2052 prom_printf("package-to-path failed\n");
2053 }
2054
2055 /* Save away the TCE table attributes for later use. */
2056 prom_setprop(node, path, "linux,tce-base", &base, sizeof(base));
2057 prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize));
2058
2059 prom_debug("TCE table: %s\n", path);
2060 prom_debug("\tnode = 0x%x\n", node);
2061 prom_debug("\tbase = 0x%llx\n", base);
2062 prom_debug("\tsize = 0x%x\n", minsize);
2063
2064 /* Initialize the table to have a one-to-one mapping
2065 * over the allocated size.
2066 */
2067 tce_entryp = (u64 *)base;
2068 for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) {
2069 tce_entry = (i << PAGE_SHIFT);
2070 tce_entry |= 0x3;
2071 *tce_entryp = tce_entry;
2072 }
2073
2074 prom_printf("opening PHB %s", path);
2075 phb_node = call_prom("open", 1, 1, path);
2076 if (phb_node == 0)
2077 prom_printf("... failed\n");
2078 else
2079 prom_printf("... done\n");
2080
2081 call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"),
2082 phb_node, -1, minsize,
2083 (u32) base, (u32) (base >> 32));
2084 call_prom("close", 1, 0, phb_node);
2085 }
2086
2087 reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom);
2088
2089 /* These are only really needed if there is a memory limit in
2090 * effect, but we don't know so export them always. */
2091 prom_tce_alloc_start = local_alloc_bottom;
2092 prom_tce_alloc_end = local_alloc_top;
2093
2094 /* Flag the first invalid entry */
2095 prom_debug("ending prom_initialize_tce_table\n");
2096}
2097#endif /* __BIG_ENDIAN__ */
2098#endif /* CONFIG_PPC64 */
2099
2100/*
2101 * With CHRP SMP we need to use the OF to start the other processors.
2102 * We can't wait until smp_boot_cpus (the OF is trashed by then)
2103 * so we have to put the processors into a holding pattern controlled
2104 * by the kernel (not OF) before we destroy the OF.
2105 *
2106 * This uses a chunk of low memory, puts some holding pattern
2107 * code there and sends the other processors off to there until
2108 * smp_boot_cpus tells them to do something. The holding pattern
2109 * checks that address until its cpu # is there, when it is that
2110 * cpu jumps to __secondary_start(). smp_boot_cpus() takes care
2111 * of setting those values.
2112 *
2113 * We also use physical address 0x4 here to tell when a cpu
2114 * is in its holding pattern code.
2115 *
2116 * -- Cort
2117 */
2118/*
2119 * We want to reference the copy of __secondary_hold_* in the
2120 * 0 - 0x100 address range
2121 */
2122#define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff)
2123
2124static void __init prom_hold_cpus(void)
2125{
2126 unsigned long i;
2127 phandle node;
2128 char type[64];
2129 unsigned long *spinloop
2130 = (void *) LOW_ADDR(__secondary_hold_spinloop);
2131 unsigned long *acknowledge
2132 = (void *) LOW_ADDR(__secondary_hold_acknowledge);
2133 unsigned long secondary_hold = LOW_ADDR(__secondary_hold);
2134
2135 /*
2136 * On pseries, if RTAS supports "query-cpu-stopped-state",
2137 * we skip this stage, the CPUs will be started by the
2138 * kernel using RTAS.
2139 */
2140 if ((of_platform == PLATFORM_PSERIES ||
2141 of_platform == PLATFORM_PSERIES_LPAR) &&
2142 rtas_has_query_cpu_stopped) {
2143 prom_printf("prom_hold_cpus: skipped\n");
2144 return;
2145 }
2146
2147 prom_debug("prom_hold_cpus: start...\n");
2148 prom_debug(" 1) spinloop = 0x%lx\n", (unsigned long)spinloop);
2149 prom_debug(" 1) *spinloop = 0x%lx\n", *spinloop);
2150 prom_debug(" 1) acknowledge = 0x%lx\n",
2151 (unsigned long)acknowledge);
2152 prom_debug(" 1) *acknowledge = 0x%lx\n", *acknowledge);
2153 prom_debug(" 1) secondary_hold = 0x%lx\n", secondary_hold);
2154
2155 /* Set the common spinloop variable, so all of the secondary cpus
2156 * will block when they are awakened from their OF spinloop.
2157 * This must occur for both SMP and non SMP kernels, since OF will
2158 * be trashed when we move the kernel.
2159 */
2160 *spinloop = 0;
2161
2162 /* look for cpus */
2163 for (node = 0; prom_next_node(&node); ) {
2164 unsigned int cpu_no;
2165 __be32 reg;
2166
2167 type[0] = 0;
2168 prom_getprop(node, "device_type", type, sizeof(type));
2169 if (prom_strcmp(type, "cpu") != 0)
2170 continue;
2171
2172 /* Skip non-configured cpus. */
2173 if (prom_getprop(node, "status", type, sizeof(type)) > 0)
2174 if (prom_strcmp(type, "okay") != 0)
2175 continue;
2176
2177 reg = cpu_to_be32(-1); /* make sparse happy */
2178 prom_getprop(node, "reg", ®, sizeof(reg));
2179 cpu_no = be32_to_cpu(reg);
2180
2181 prom_debug("cpu hw idx = %u\n", cpu_no);
2182
2183 /* Init the acknowledge var which will be reset by
2184 * the secondary cpu when it awakens from its OF
2185 * spinloop.
2186 */
2187 *acknowledge = (unsigned long)-1;
2188
2189 if (cpu_no != prom.cpu) {
2190 /* Primary Thread of non-boot cpu or any thread */
2191 prom_printf("starting cpu hw idx %u... ", cpu_no);
2192 call_prom("start-cpu", 3, 0, node,
2193 secondary_hold, cpu_no);
2194
2195 for (i = 0; (i < 100000000) &&
2196 (*acknowledge == ((unsigned long)-1)); i++ )
2197 mb();
2198
2199 if (*acknowledge == cpu_no)
2200 prom_printf("done\n");
2201 else
2202 prom_printf("failed: %lx\n", *acknowledge);
2203 }
2204#ifdef CONFIG_SMP
2205 else
2206 prom_printf("boot cpu hw idx %u\n", cpu_no);
2207#endif /* CONFIG_SMP */
2208 }
2209
2210 prom_debug("prom_hold_cpus: end...\n");
2211}
2212
2213
2214static void __init prom_init_client_services(unsigned long pp)
2215{
2216 /* Get a handle to the prom entry point before anything else */
2217 prom_entry = pp;
2218
2219 /* get a handle for the stdout device */
2220 prom.chosen = call_prom("finddevice", 1, 1, ADDR("/chosen"));
2221 if (!PHANDLE_VALID(prom.chosen))
2222 prom_panic("cannot find chosen"); /* msg won't be printed :( */
2223
2224 /* get device tree root */
2225 prom.root = call_prom("finddevice", 1, 1, ADDR("/"));
2226 if (!PHANDLE_VALID(prom.root))
2227 prom_panic("cannot find device tree root"); /* msg won't be printed :( */
2228
2229 prom.mmumap = 0;
2230}
2231
2232#ifdef CONFIG_PPC32
2233/*
2234 * For really old powermacs, we need to map things we claim.
2235 * For that, we need the ihandle of the mmu.
2236 * Also, on the longtrail, we need to work around other bugs.
2237 */
2238static void __init prom_find_mmu(void)
2239{
2240 phandle oprom;
2241 char version[64];
2242
2243 oprom = call_prom("finddevice", 1, 1, ADDR("/openprom"));
2244 if (!PHANDLE_VALID(oprom))
2245 return;
2246 if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0)
2247 return;
2248 version[sizeof(version) - 1] = 0;
2249 /* XXX might need to add other versions here */
2250 if (prom_strcmp(version, "Open Firmware, 1.0.5") == 0)
2251 of_workarounds = OF_WA_CLAIM;
2252 else if (prom_strncmp(version, "FirmWorks,3.", 12) == 0) {
2253 of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL;
2254 call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim");
2255 } else
2256 return;
2257 prom.memory = call_prom("open", 1, 1, ADDR("/memory"));
2258 prom_getprop(prom.chosen, "mmu", &prom.mmumap,
2259 sizeof(prom.mmumap));
2260 prom.mmumap = be32_to_cpu(prom.mmumap);
2261 if (!IHANDLE_VALID(prom.memory) || !IHANDLE_VALID(prom.mmumap))
2262 of_workarounds &= ~OF_WA_CLAIM; /* hmmm */
2263}
2264#else
2265#define prom_find_mmu()
2266#endif
2267
2268static void __init prom_init_stdout(void)
2269{
2270 char *path = of_stdout_device;
2271 char type[16];
2272 phandle stdout_node;
2273 __be32 val;
2274
2275 if (prom_getprop(prom.chosen, "stdout", &val, sizeof(val)) <= 0)
2276 prom_panic("cannot find stdout");
2277
2278 prom.stdout = be32_to_cpu(val);
2279
2280 /* Get the full OF pathname of the stdout device */
2281 memset(path, 0, 256);
2282 call_prom("instance-to-path", 3, 1, prom.stdout, path, 255);
2283 prom_printf("OF stdout device is: %s\n", of_stdout_device);
2284 prom_setprop(prom.chosen, "/chosen", "linux,stdout-path",
2285 path, prom_strlen(path) + 1);
2286
2287 /* instance-to-package fails on PA-Semi */
2288 stdout_node = call_prom("instance-to-package", 1, 1, prom.stdout);
2289 if (stdout_node != PROM_ERROR) {
2290 val = cpu_to_be32(stdout_node);
2291
2292 /* If it's a display, note it */
2293 memset(type, 0, sizeof(type));
2294 prom_getprop(stdout_node, "device_type", type, sizeof(type));
2295 if (prom_strcmp(type, "display") == 0)
2296 prom_setprop(stdout_node, path, "linux,boot-display", NULL, 0);
2297 }
2298}
2299
2300static int __init prom_find_machine_type(void)
2301{
2302 char compat[256];
2303 int len, i = 0;
2304#ifdef CONFIG_PPC64
2305 phandle rtas;
2306 int x;
2307#endif
2308
2309 /* Look for a PowerMac or a Cell */
2310 len = prom_getprop(prom.root, "compatible",
2311 compat, sizeof(compat)-1);
2312 if (len > 0) {
2313 compat[len] = 0;
2314 while (i < len) {
2315 char *p = &compat[i];
2316 int sl = prom_strlen(p);
2317 if (sl == 0)
2318 break;
2319 if (prom_strstr(p, "Power Macintosh") ||
2320 prom_strstr(p, "MacRISC"))
2321 return PLATFORM_POWERMAC;
2322#ifdef CONFIG_PPC64
2323 /* We must make sure we don't detect the IBM Cell
2324 * blades as pSeries due to some firmware issues,
2325 * so we do it here.
2326 */
2327 if (prom_strstr(p, "IBM,CBEA") ||
2328 prom_strstr(p, "IBM,CPBW-1.0"))
2329 return PLATFORM_GENERIC;
2330#endif /* CONFIG_PPC64 */
2331 i += sl + 1;
2332 }
2333 }
2334#ifdef CONFIG_PPC64
2335 /* Try to figure out if it's an IBM pSeries or any other
2336 * PAPR compliant platform. We assume it is if :
2337 * - /device_type is "chrp" (please, do NOT use that for future
2338 * non-IBM designs !
2339 * - it has /rtas
2340 */
2341 len = prom_getprop(prom.root, "device_type",
2342 compat, sizeof(compat)-1);
2343 if (len <= 0)
2344 return PLATFORM_GENERIC;
2345 if (prom_strcmp(compat, "chrp"))
2346 return PLATFORM_GENERIC;
2347
2348 /* Default to pSeries. We need to know if we are running LPAR */
2349 rtas = call_prom("finddevice", 1, 1, ADDR("/rtas"));
2350 if (!PHANDLE_VALID(rtas))
2351 return PLATFORM_GENERIC;
2352 x = prom_getproplen(rtas, "ibm,hypertas-functions");
2353 if (x != PROM_ERROR) {
2354 prom_debug("Hypertas detected, assuming LPAR !\n");
2355 return PLATFORM_PSERIES_LPAR;
2356 }
2357 return PLATFORM_PSERIES;
2358#else
2359 return PLATFORM_GENERIC;
2360#endif
2361}
2362
2363static int __init prom_set_color(ihandle ih, int i, int r, int g, int b)
2364{
2365 return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r);
2366}
2367
2368/*
2369 * If we have a display that we don't know how to drive,
2370 * we will want to try to execute OF's open method for it
2371 * later. However, OF will probably fall over if we do that
2372 * we've taken over the MMU.
2373 * So we check whether we will need to open the display,
2374 * and if so, open it now.
2375 */
2376static void __init prom_check_displays(void)
2377{
2378 char type[16], *path;
2379 phandle node;
2380 ihandle ih;
2381 int i;
2382
2383 static const unsigned char default_colors[] __initconst = {
2384 0x00, 0x00, 0x00,
2385 0x00, 0x00, 0xaa,
2386 0x00, 0xaa, 0x00,
2387 0x00, 0xaa, 0xaa,
2388 0xaa, 0x00, 0x00,
2389 0xaa, 0x00, 0xaa,
2390 0xaa, 0xaa, 0x00,
2391 0xaa, 0xaa, 0xaa,
2392 0x55, 0x55, 0x55,
2393 0x55, 0x55, 0xff,
2394 0x55, 0xff, 0x55,
2395 0x55, 0xff, 0xff,
2396 0xff, 0x55, 0x55,
2397 0xff, 0x55, 0xff,
2398 0xff, 0xff, 0x55,
2399 0xff, 0xff, 0xff
2400 };
2401 const unsigned char *clut;
2402
2403 prom_debug("Looking for displays\n");
2404 for (node = 0; prom_next_node(&node); ) {
2405 memset(type, 0, sizeof(type));
2406 prom_getprop(node, "device_type", type, sizeof(type));
2407 if (prom_strcmp(type, "display") != 0)
2408 continue;
2409
2410 /* It seems OF doesn't null-terminate the path :-( */
2411 path = prom_scratch;
2412 memset(path, 0, sizeof(prom_scratch));
2413
2414 /*
2415 * leave some room at the end of the path for appending extra
2416 * arguments
2417 */
2418 if (call_prom("package-to-path", 3, 1, node, path,
2419 sizeof(prom_scratch) - 10) == PROM_ERROR)
2420 continue;
2421 prom_printf("found display : %s, opening... ", path);
2422
2423 ih = call_prom("open", 1, 1, path);
2424 if (ih == 0) {
2425 prom_printf("failed\n");
2426 continue;
2427 }
2428
2429 /* Success */
2430 prom_printf("done\n");
2431 prom_setprop(node, path, "linux,opened", NULL, 0);
2432
2433 /* Setup a usable color table when the appropriate
2434 * method is available. Should update this to set-colors */
2435 clut = default_colors;
2436 for (i = 0; i < 16; i++, clut += 3)
2437 if (prom_set_color(ih, i, clut[0], clut[1],
2438 clut[2]) != 0)
2439 break;
2440
2441#ifdef CONFIG_LOGO_LINUX_CLUT224
2442 clut = PTRRELOC(logo_linux_clut224.clut);
2443 for (i = 0; i < logo_linux_clut224.clutsize; i++, clut += 3)
2444 if (prom_set_color(ih, i + 32, clut[0], clut[1],
2445 clut[2]) != 0)
2446 break;
2447#endif /* CONFIG_LOGO_LINUX_CLUT224 */
2448
2449#ifdef CONFIG_PPC_EARLY_DEBUG_BOOTX
2450 if (prom_getprop(node, "linux,boot-display", NULL, 0) !=
2451 PROM_ERROR) {
2452 u32 width, height, pitch, addr;
2453
2454 prom_printf("Setting btext !\n");
2455
2456 if (prom_getprop(node, "width", &width, 4) == PROM_ERROR)
2457 return;
2458
2459 if (prom_getprop(node, "height", &height, 4) == PROM_ERROR)
2460 return;
2461
2462 if (prom_getprop(node, "linebytes", &pitch, 4) == PROM_ERROR)
2463 return;
2464
2465 if (prom_getprop(node, "address", &addr, 4) == PROM_ERROR)
2466 return;
2467
2468 prom_printf("W=%d H=%d LB=%d addr=0x%x\n",
2469 width, height, pitch, addr);
2470 btext_setup_display(width, height, 8, pitch, addr);
2471 btext_prepare_BAT();
2472 }
2473#endif /* CONFIG_PPC_EARLY_DEBUG_BOOTX */
2474 }
2475}
2476
2477
2478/* Return (relocated) pointer to this much memory: moves initrd if reqd. */
2479static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end,
2480 unsigned long needed, unsigned long align)
2481{
2482 void *ret;
2483
2484 *mem_start = ALIGN(*mem_start, align);
2485 while ((*mem_start + needed) > *mem_end) {
2486 unsigned long room, chunk;
2487
2488 prom_debug("Chunk exhausted, claiming more at %lx...\n",
2489 alloc_bottom);
2490 room = alloc_top - alloc_bottom;
2491 if (room > DEVTREE_CHUNK_SIZE)
2492 room = DEVTREE_CHUNK_SIZE;
2493 if (room < PAGE_SIZE)
2494 prom_panic("No memory for flatten_device_tree "
2495 "(no room)\n");
2496 chunk = alloc_up(room, 0);
2497 if (chunk == 0)
2498 prom_panic("No memory for flatten_device_tree "
2499 "(claim failed)\n");
2500 *mem_end = chunk + room;
2501 }
2502
2503 ret = (void *)*mem_start;
2504 *mem_start += needed;
2505
2506 return ret;
2507}
2508
2509#define dt_push_token(token, mem_start, mem_end) do { \
2510 void *room = make_room(mem_start, mem_end, 4, 4); \
2511 *(__be32 *)room = cpu_to_be32(token); \
2512 } while(0)
2513
2514static unsigned long __init dt_find_string(char *str)
2515{
2516 char *s, *os;
2517
2518 s = os = (char *)dt_string_start;
2519 s += 4;
2520 while (s < (char *)dt_string_end) {
2521 if (prom_strcmp(s, str) == 0)
2522 return s - os;
2523 s += prom_strlen(s) + 1;
2524 }
2525 return 0;
2526}
2527
2528/*
2529 * The Open Firmware 1275 specification states properties must be 31 bytes or
2530 * less, however not all firmwares obey this. Make it 64 bytes to be safe.
2531 */
2532#define MAX_PROPERTY_NAME 64
2533
2534static void __init scan_dt_build_strings(phandle node,
2535 unsigned long *mem_start,
2536 unsigned long *mem_end)
2537{
2538 char *prev_name, *namep, *sstart;
2539 unsigned long soff;
2540 phandle child;
2541
2542 sstart = (char *)dt_string_start;
2543
2544 /* get and store all property names */
2545 prev_name = "";
2546 for (;;) {
2547 /* 64 is max len of name including nul. */
2548 namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1);
2549 if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) {
2550 /* No more nodes: unwind alloc */
2551 *mem_start = (unsigned long)namep;
2552 break;
2553 }
2554
2555 /* skip "name" */
2556 if (prom_strcmp(namep, "name") == 0) {
2557 *mem_start = (unsigned long)namep;
2558 prev_name = "name";
2559 continue;
2560 }
2561 /* get/create string entry */
2562 soff = dt_find_string(namep);
2563 if (soff != 0) {
2564 *mem_start = (unsigned long)namep;
2565 namep = sstart + soff;
2566 } else {
2567 /* Trim off some if we can */
2568 *mem_start = (unsigned long)namep + prom_strlen(namep) + 1;
2569 dt_string_end = *mem_start;
2570 }
2571 prev_name = namep;
2572 }
2573
2574 /* do all our children */
2575 child = call_prom("child", 1, 1, node);
2576 while (child != 0) {
2577 scan_dt_build_strings(child, mem_start, mem_end);
2578 child = call_prom("peer", 1, 1, child);
2579 }
2580}
2581
2582static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
2583 unsigned long *mem_end)
2584{
2585 phandle child;
2586 char *namep, *prev_name, *sstart, *p, *ep, *lp, *path;
2587 unsigned long soff;
2588 unsigned char *valp;
2589 static char pname[MAX_PROPERTY_NAME] __prombss;
2590 int l, room, has_phandle = 0;
2591
2592 dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end);
2593
2594 /* get the node's full name */
2595 namep = (char *)*mem_start;
2596 room = *mem_end - *mem_start;
2597 if (room > 255)
2598 room = 255;
2599 l = call_prom("package-to-path", 3, 1, node, namep, room);
2600 if (l >= 0) {
2601 /* Didn't fit? Get more room. */
2602 if (l >= room) {
2603 if (l >= *mem_end - *mem_start)
2604 namep = make_room(mem_start, mem_end, l+1, 1);
2605 call_prom("package-to-path", 3, 1, node, namep, l);
2606 }
2607 namep[l] = '\0';
2608
2609 /* Fixup an Apple bug where they have bogus \0 chars in the
2610 * middle of the path in some properties, and extract
2611 * the unit name (everything after the last '/').
2612 */
2613 for (lp = p = namep, ep = namep + l; p < ep; p++) {
2614 if (*p == '/')
2615 lp = namep;
2616 else if (*p != 0)
2617 *lp++ = *p;
2618 }
2619 *lp = 0;
2620 *mem_start = ALIGN((unsigned long)lp + 1, 4);
2621 }
2622
2623 /* get it again for debugging */
2624 path = prom_scratch;
2625 memset(path, 0, sizeof(prom_scratch));
2626 call_prom("package-to-path", 3, 1, node, path, sizeof(prom_scratch) - 1);
2627
2628 /* get and store all properties */
2629 prev_name = "";
2630 sstart = (char *)dt_string_start;
2631 for (;;) {
2632 if (call_prom("nextprop", 3, 1, node, prev_name,
2633 pname) != 1)
2634 break;
2635
2636 /* skip "name" */
2637 if (prom_strcmp(pname, "name") == 0) {
2638 prev_name = "name";
2639 continue;
2640 }
2641
2642 /* find string offset */
2643 soff = dt_find_string(pname);
2644 if (soff == 0) {
2645 prom_printf("WARNING: Can't find string index for"
2646 " <%s>, node %s\n", pname, path);
2647 break;
2648 }
2649 prev_name = sstart + soff;
2650
2651 /* get length */
2652 l = call_prom("getproplen", 2, 1, node, pname);
2653
2654 /* sanity checks */
2655 if (l == PROM_ERROR)
2656 continue;
2657
2658 /* push property head */
2659 dt_push_token(OF_DT_PROP, mem_start, mem_end);
2660 dt_push_token(l, mem_start, mem_end);
2661 dt_push_token(soff, mem_start, mem_end);
2662
2663 /* push property content */
2664 valp = make_room(mem_start, mem_end, l, 4);
2665 call_prom("getprop", 4, 1, node, pname, valp, l);
2666 *mem_start = ALIGN(*mem_start, 4);
2667
2668 if (!prom_strcmp(pname, "phandle"))
2669 has_phandle = 1;
2670 }
2671
2672 /* Add a "phandle" property if none already exist */
2673 if (!has_phandle) {
2674 soff = dt_find_string("phandle");
2675 if (soff == 0)
2676 prom_printf("WARNING: Can't find string index for <phandle> node %s\n", path);
2677 else {
2678 dt_push_token(OF_DT_PROP, mem_start, mem_end);
2679 dt_push_token(4, mem_start, mem_end);
2680 dt_push_token(soff, mem_start, mem_end);
2681 valp = make_room(mem_start, mem_end, 4, 4);
2682 *(__be32 *)valp = cpu_to_be32(node);
2683 }
2684 }
2685
2686 /* do all our children */
2687 child = call_prom("child", 1, 1, node);
2688 while (child != 0) {
2689 scan_dt_build_struct(child, mem_start, mem_end);
2690 child = call_prom("peer", 1, 1, child);
2691 }
2692
2693 dt_push_token(OF_DT_END_NODE, mem_start, mem_end);
2694}
2695
2696static void __init flatten_device_tree(void)
2697{
2698 phandle root;
2699 unsigned long mem_start, mem_end, room;
2700 struct boot_param_header *hdr;
2701 char *namep;
2702 u64 *rsvmap;
2703
2704 /*
2705 * Check how much room we have between alloc top & bottom (+/- a
2706 * few pages), crop to 1MB, as this is our "chunk" size
2707 */
2708 room = alloc_top - alloc_bottom - 0x4000;
2709 if (room > DEVTREE_CHUNK_SIZE)
2710 room = DEVTREE_CHUNK_SIZE;
2711 prom_debug("starting device tree allocs at %lx\n", alloc_bottom);
2712
2713 /* Now try to claim that */
2714 mem_start = (unsigned long)alloc_up(room, PAGE_SIZE);
2715 if (mem_start == 0)
2716 prom_panic("Can't allocate initial device-tree chunk\n");
2717 mem_end = mem_start + room;
2718
2719 /* Get root of tree */
2720 root = call_prom("peer", 1, 1, (phandle)0);
2721 if (root == (phandle)0)
2722 prom_panic ("couldn't get device tree root\n");
2723
2724 /* Build header and make room for mem rsv map */
2725 mem_start = ALIGN(mem_start, 4);
2726 hdr = make_room(&mem_start, &mem_end,
2727 sizeof(struct boot_param_header), 4);
2728 dt_header_start = (unsigned long)hdr;
2729 rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8);
2730
2731 /* Start of strings */
2732 mem_start = PAGE_ALIGN(mem_start);
2733 dt_string_start = mem_start;
2734 mem_start += 4; /* hole */
2735
2736 /* Add "phandle" in there, we'll need it */
2737 namep = make_room(&mem_start, &mem_end, 16, 1);
2738 prom_strscpy_pad(namep, "phandle", sizeof("phandle"));
2739 mem_start = (unsigned long)namep + prom_strlen(namep) + 1;
2740
2741 /* Build string array */
2742 prom_printf("Building dt strings...\n");
2743 scan_dt_build_strings(root, &mem_start, &mem_end);
2744 dt_string_end = mem_start;
2745
2746 /* Build structure */
2747 mem_start = PAGE_ALIGN(mem_start);
2748 dt_struct_start = mem_start;
2749 prom_printf("Building dt structure...\n");
2750 scan_dt_build_struct(root, &mem_start, &mem_end);
2751 dt_push_token(OF_DT_END, &mem_start, &mem_end);
2752 dt_struct_end = PAGE_ALIGN(mem_start);
2753
2754 /* Finish header */
2755 hdr->boot_cpuid_phys = cpu_to_be32(prom.cpu);
2756 hdr->magic = cpu_to_be32(OF_DT_HEADER);
2757 hdr->totalsize = cpu_to_be32(dt_struct_end - dt_header_start);
2758 hdr->off_dt_struct = cpu_to_be32(dt_struct_start - dt_header_start);
2759 hdr->off_dt_strings = cpu_to_be32(dt_string_start - dt_header_start);
2760 hdr->dt_strings_size = cpu_to_be32(dt_string_end - dt_string_start);
2761 hdr->off_mem_rsvmap = cpu_to_be32(((unsigned long)rsvmap) - dt_header_start);
2762 hdr->version = cpu_to_be32(OF_DT_VERSION);
2763 /* Version 16 is not backward compatible */
2764 hdr->last_comp_version = cpu_to_be32(0x10);
2765
2766 /* Copy the reserve map in */
2767 memcpy(rsvmap, mem_reserve_map, sizeof(mem_reserve_map));
2768
2769#ifdef DEBUG_PROM
2770 {
2771 int i;
2772 prom_printf("reserved memory map:\n");
2773 for (i = 0; i < mem_reserve_cnt; i++)
2774 prom_printf(" %llx - %llx\n",
2775 be64_to_cpu(mem_reserve_map[i].base),
2776 be64_to_cpu(mem_reserve_map[i].size));
2777 }
2778#endif
2779 /* Bump mem_reserve_cnt to cause further reservations to fail
2780 * since it's too late.
2781 */
2782 mem_reserve_cnt = MEM_RESERVE_MAP_SIZE;
2783
2784 prom_printf("Device tree strings 0x%lx -> 0x%lx\n",
2785 dt_string_start, dt_string_end);
2786 prom_printf("Device tree struct 0x%lx -> 0x%lx\n",
2787 dt_struct_start, dt_struct_end);
2788}
2789
2790#ifdef CONFIG_PPC_MAPLE
2791/* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property.
2792 * The values are bad, and it doesn't even have the right number of cells. */
2793static void __init fixup_device_tree_maple(void)
2794{
2795 phandle isa;
2796 u32 rloc = 0x01002000; /* IO space; PCI device = 4 */
2797 u32 isa_ranges[6];
2798 char *name;
2799
2800 name = "/ht@0/isa@4";
2801 isa = call_prom("finddevice", 1, 1, ADDR(name));
2802 if (!PHANDLE_VALID(isa)) {
2803 name = "/ht@0/isa@6";
2804 isa = call_prom("finddevice", 1, 1, ADDR(name));
2805 rloc = 0x01003000; /* IO space; PCI device = 6 */
2806 }
2807 if (!PHANDLE_VALID(isa))
2808 return;
2809
2810 if (prom_getproplen(isa, "ranges") != 12)
2811 return;
2812 if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges))
2813 == PROM_ERROR)
2814 return;
2815
2816 if (isa_ranges[0] != 0x1 ||
2817 isa_ranges[1] != 0xf4000000 ||
2818 isa_ranges[2] != 0x00010000)
2819 return;
2820
2821 prom_printf("Fixing up bogus ISA range on Maple/Apache...\n");
2822
2823 isa_ranges[0] = 0x1;
2824 isa_ranges[1] = 0x0;
2825 isa_ranges[2] = rloc;
2826 isa_ranges[3] = 0x0;
2827 isa_ranges[4] = 0x0;
2828 isa_ranges[5] = 0x00010000;
2829 prom_setprop(isa, name, "ranges",
2830 isa_ranges, sizeof(isa_ranges));
2831}
2832
2833#define CPC925_MC_START 0xf8000000
2834#define CPC925_MC_LENGTH 0x1000000
2835/* The values for memory-controller don't have right number of cells */
2836static void __init fixup_device_tree_maple_memory_controller(void)
2837{
2838 phandle mc;
2839 u32 mc_reg[4];
2840 char *name = "/hostbridge@f8000000";
2841 u32 ac, sc;
2842
2843 mc = call_prom("finddevice", 1, 1, ADDR(name));
2844 if (!PHANDLE_VALID(mc))
2845 return;
2846
2847 if (prom_getproplen(mc, "reg") != 8)
2848 return;
2849
2850 prom_getprop(prom.root, "#address-cells", &ac, sizeof(ac));
2851 prom_getprop(prom.root, "#size-cells", &sc, sizeof(sc));
2852 if ((ac != 2) || (sc != 2))
2853 return;
2854
2855 if (prom_getprop(mc, "reg", mc_reg, sizeof(mc_reg)) == PROM_ERROR)
2856 return;
2857
2858 if (mc_reg[0] != CPC925_MC_START || mc_reg[1] != CPC925_MC_LENGTH)
2859 return;
2860
2861 prom_printf("Fixing up bogus hostbridge on Maple...\n");
2862
2863 mc_reg[0] = 0x0;
2864 mc_reg[1] = CPC925_MC_START;
2865 mc_reg[2] = 0x0;
2866 mc_reg[3] = CPC925_MC_LENGTH;
2867 prom_setprop(mc, name, "reg", mc_reg, sizeof(mc_reg));
2868}
2869#else
2870#define fixup_device_tree_maple()
2871#define fixup_device_tree_maple_memory_controller()
2872#endif
2873
2874#ifdef CONFIG_PPC_CHRP
2875/*
2876 * Pegasos and BriQ lacks the "ranges" property in the isa node
2877 * Pegasos needs decimal IRQ 14/15, not hexadecimal
2878 * Pegasos has the IDE configured in legacy mode, but advertised as native
2879 */
2880static void __init fixup_device_tree_chrp(void)
2881{
2882 phandle ph;
2883 u32 prop[6];
2884 u32 rloc = 0x01006000; /* IO space; PCI device = 12 */
2885 char *name;
2886 int rc;
2887
2888 name = "/pci@80000000/isa@c";
2889 ph = call_prom("finddevice", 1, 1, ADDR(name));
2890 if (!PHANDLE_VALID(ph)) {
2891 name = "/pci@ff500000/isa@6";
2892 ph = call_prom("finddevice", 1, 1, ADDR(name));
2893 rloc = 0x01003000; /* IO space; PCI device = 6 */
2894 }
2895 if (PHANDLE_VALID(ph)) {
2896 rc = prom_getproplen(ph, "ranges");
2897 if (rc == 0 || rc == PROM_ERROR) {
2898 prom_printf("Fixing up missing ISA range on Pegasos...\n");
2899
2900 prop[0] = 0x1;
2901 prop[1] = 0x0;
2902 prop[2] = rloc;
2903 prop[3] = 0x0;
2904 prop[4] = 0x0;
2905 prop[5] = 0x00010000;
2906 prom_setprop(ph, name, "ranges", prop, sizeof(prop));
2907 }
2908 }
2909
2910 name = "/pci@80000000/ide@C,1";
2911 ph = call_prom("finddevice", 1, 1, ADDR(name));
2912 if (PHANDLE_VALID(ph)) {
2913 prom_printf("Fixing up IDE interrupt on Pegasos...\n");
2914 prop[0] = 14;
2915 prop[1] = 0x0;
2916 prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32));
2917 prom_printf("Fixing up IDE class-code on Pegasos...\n");
2918 rc = prom_getprop(ph, "class-code", prop, sizeof(u32));
2919 if (rc == sizeof(u32)) {
2920 prop[0] &= ~0x5;
2921 prom_setprop(ph, name, "class-code", prop, sizeof(u32));
2922 }
2923 }
2924}
2925#else
2926#define fixup_device_tree_chrp()
2927#endif
2928
2929#if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)
2930static void __init fixup_device_tree_pmac(void)
2931{
2932 phandle u3, i2c, mpic;
2933 u32 u3_rev;
2934 u32 interrupts[2];
2935 u32 parent;
2936
2937 /* Some G5s have a missing interrupt definition, fix it up here */
2938 u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000"));
2939 if (!PHANDLE_VALID(u3))
2940 return;
2941 i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000"));
2942 if (!PHANDLE_VALID(i2c))
2943 return;
2944 mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000"));
2945 if (!PHANDLE_VALID(mpic))
2946 return;
2947
2948 /* check if proper rev of u3 */
2949 if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev))
2950 == PROM_ERROR)
2951 return;
2952 if (u3_rev < 0x35 || u3_rev > 0x39)
2953 return;
2954 /* does it need fixup ? */
2955 if (prom_getproplen(i2c, "interrupts") > 0)
2956 return;
2957
2958 prom_printf("fixing up bogus interrupts for u3 i2c...\n");
2959
2960 /* interrupt on this revision of u3 is number 0 and level */
2961 interrupts[0] = 0;
2962 interrupts[1] = 1;
2963 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts",
2964 &interrupts, sizeof(interrupts));
2965 parent = (u32)mpic;
2966 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent",
2967 &parent, sizeof(parent));
2968}
2969#else
2970#define fixup_device_tree_pmac()
2971#endif
2972
2973#ifdef CONFIG_PPC_EFIKA
2974/*
2975 * The MPC5200 FEC driver requires an phy-handle property to tell it how
2976 * to talk to the phy. If the phy-handle property is missing, then this
2977 * function is called to add the appropriate nodes and link it to the
2978 * ethernet node.
2979 */
2980static void __init fixup_device_tree_efika_add_phy(void)
2981{
2982 u32 node;
2983 char prop[64];
2984 int rv;
2985
2986 /* Check if /builtin/ethernet exists - bail if it doesn't */
2987 node = call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet"));
2988 if (!PHANDLE_VALID(node))
2989 return;
2990
2991 /* Check if the phy-handle property exists - bail if it does */
2992 rv = prom_getprop(node, "phy-handle", prop, sizeof(prop));
2993 if (!rv)
2994 return;
2995
2996 /*
2997 * At this point the ethernet device doesn't have a phy described.
2998 * Now we need to add the missing phy node and linkage
2999 */
3000
3001 /* Check for an MDIO bus node - if missing then create one */
3002 node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio"));
3003 if (!PHANDLE_VALID(node)) {
3004 prom_printf("Adding Ethernet MDIO node\n");
3005 call_prom("interpret", 1, 1,
3006 " s\" /builtin\" find-device"
3007 " new-device"
3008 " 1 encode-int s\" #address-cells\" property"
3009 " 0 encode-int s\" #size-cells\" property"
3010 " s\" mdio\" device-name"
3011 " s\" fsl,mpc5200b-mdio\" encode-string"
3012 " s\" compatible\" property"
3013 " 0xf0003000 0x400 reg"
3014 " 0x2 encode-int"
3015 " 0x5 encode-int encode+"
3016 " 0x3 encode-int encode+"
3017 " s\" interrupts\" property"
3018 " finish-device");
3019 }
3020
3021 /* Check for a PHY device node - if missing then create one and
3022 * give it's phandle to the ethernet node */
3023 node = call_prom("finddevice", 1, 1,
3024 ADDR("/builtin/mdio/ethernet-phy"));
3025 if (!PHANDLE_VALID(node)) {
3026 prom_printf("Adding Ethernet PHY node\n");
3027 call_prom("interpret", 1, 1,
3028 " s\" /builtin/mdio\" find-device"
3029 " new-device"
3030 " s\" ethernet-phy\" device-name"
3031 " 0x10 encode-int s\" reg\" property"
3032 " my-self"
3033 " ihandle>phandle"
3034 " finish-device"
3035 " s\" /builtin/ethernet\" find-device"
3036 " encode-int"
3037 " s\" phy-handle\" property"
3038 " device-end");
3039 }
3040}
3041
3042static void __init fixup_device_tree_efika(void)
3043{
3044 int sound_irq[3] = { 2, 2, 0 };
3045 int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0,
3046 3,4,0, 3,5,0, 3,6,0, 3,7,0,
3047 3,8,0, 3,9,0, 3,10,0, 3,11,0,
3048 3,12,0, 3,13,0, 3,14,0, 3,15,0 };
3049 u32 node;
3050 char prop[64];
3051 int rv, len;
3052
3053 /* Check if we're really running on a EFIKA */
3054 node = call_prom("finddevice", 1, 1, ADDR("/"));
3055 if (!PHANDLE_VALID(node))
3056 return;
3057
3058 rv = prom_getprop(node, "model", prop, sizeof(prop));
3059 if (rv == PROM_ERROR)
3060 return;
3061 if (prom_strcmp(prop, "EFIKA5K2"))
3062 return;
3063
3064 prom_printf("Applying EFIKA device tree fixups\n");
3065
3066 /* Claiming to be 'chrp' is death */
3067 node = call_prom("finddevice", 1, 1, ADDR("/"));
3068 rv = prom_getprop(node, "device_type", prop, sizeof(prop));
3069 if (rv != PROM_ERROR && (prom_strcmp(prop, "chrp") == 0))
3070 prom_setprop(node, "/", "device_type", "efika", sizeof("efika"));
3071
3072 /* CODEGEN,description is exposed in /proc/cpuinfo so
3073 fix that too */
3074 rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop));
3075 if (rv != PROM_ERROR && (prom_strstr(prop, "CHRP")))
3076 prom_setprop(node, "/", "CODEGEN,description",
3077 "Efika 5200B PowerPC System",
3078 sizeof("Efika 5200B PowerPC System"));
3079
3080 /* Fixup bestcomm interrupts property */
3081 node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm"));
3082 if (PHANDLE_VALID(node)) {
3083 len = prom_getproplen(node, "interrupts");
3084 if (len == 12) {
3085 prom_printf("Fixing bestcomm interrupts property\n");
3086 prom_setprop(node, "/builtin/bestcom", "interrupts",
3087 bcomm_irq, sizeof(bcomm_irq));
3088 }
3089 }
3090
3091 /* Fixup sound interrupts property */
3092 node = call_prom("finddevice", 1, 1, ADDR("/builtin/sound"));
3093 if (PHANDLE_VALID(node)) {
3094 rv = prom_getprop(node, "interrupts", prop, sizeof(prop));
3095 if (rv == PROM_ERROR) {
3096 prom_printf("Adding sound interrupts property\n");
3097 prom_setprop(node, "/builtin/sound", "interrupts",
3098 sound_irq, sizeof(sound_irq));
3099 }
3100 }
3101
3102 /* Make sure ethernet phy-handle property exists */
3103 fixup_device_tree_efika_add_phy();
3104}
3105#else
3106#define fixup_device_tree_efika()
3107#endif
3108
3109#ifdef CONFIG_PPC_PASEMI_NEMO
3110/*
3111 * CFE supplied on Nemo is broken in several ways, biggest
3112 * problem is that it reassigns ISA interrupts to unused mpic ints.
3113 * Add an interrupt-controller property for the io-bridge to use
3114 * and correct the ints so we can attach them to an irq_domain
3115 */
3116static void __init fixup_device_tree_pasemi(void)
3117{
3118 u32 interrupts[2], parent, rval, val = 0;
3119 char *name, *pci_name;
3120 phandle iob, node;
3121
3122 /* Find the root pci node */
3123 name = "/pxp@0,e0000000";
3124 iob = call_prom("finddevice", 1, 1, ADDR(name));
3125 if (!PHANDLE_VALID(iob))
3126 return;
3127
3128 /* check if interrupt-controller node set yet */
3129 if (prom_getproplen(iob, "interrupt-controller") !=PROM_ERROR)
3130 return;
3131
3132 prom_printf("adding interrupt-controller property for SB600...\n");
3133
3134 prom_setprop(iob, name, "interrupt-controller", &val, 0);
3135
3136 pci_name = "/pxp@0,e0000000/pci@11";
3137 node = call_prom("finddevice", 1, 1, ADDR(pci_name));
3138 parent = ADDR(iob);
3139
3140 for( ; prom_next_node(&node); ) {
3141 /* scan each node for one with an interrupt */
3142 if (!PHANDLE_VALID(node))
3143 continue;
3144
3145 rval = prom_getproplen(node, "interrupts");
3146 if (rval == 0 || rval == PROM_ERROR)
3147 continue;
3148
3149 prom_getprop(node, "interrupts", &interrupts, sizeof(interrupts));
3150 if ((interrupts[0] < 212) || (interrupts[0] > 222))
3151 continue;
3152
3153 /* found a node, update both interrupts and interrupt-parent */
3154 if ((interrupts[0] >= 212) && (interrupts[0] <= 215))
3155 interrupts[0] -= 203;
3156 if ((interrupts[0] >= 216) && (interrupts[0] <= 220))
3157 interrupts[0] -= 213;
3158 if (interrupts[0] == 221)
3159 interrupts[0] = 14;
3160 if (interrupts[0] == 222)
3161 interrupts[0] = 8;
3162
3163 prom_setprop(node, pci_name, "interrupts", interrupts,
3164 sizeof(interrupts));
3165 prom_setprop(node, pci_name, "interrupt-parent", &parent,
3166 sizeof(parent));
3167 }
3168
3169 /*
3170 * The io-bridge has device_type set to 'io-bridge' change it to 'isa'
3171 * so that generic isa-bridge code can add the SB600 and its on-board
3172 * peripherals.
3173 */
3174 name = "/pxp@0,e0000000/io-bridge@0";
3175 iob = call_prom("finddevice", 1, 1, ADDR(name));
3176 if (!PHANDLE_VALID(iob))
3177 return;
3178
3179 /* device_type is already set, just change it. */
3180
3181 prom_printf("Changing device_type of SB600 node...\n");
3182
3183 prom_setprop(iob, name, "device_type", "isa", sizeof("isa"));
3184}
3185#else /* !CONFIG_PPC_PASEMI_NEMO */
3186static inline void fixup_device_tree_pasemi(void) { }
3187#endif
3188
3189static void __init fixup_device_tree(void)
3190{
3191 fixup_device_tree_maple();
3192 fixup_device_tree_maple_memory_controller();
3193 fixup_device_tree_chrp();
3194 fixup_device_tree_pmac();
3195 fixup_device_tree_efika();
3196 fixup_device_tree_pasemi();
3197}
3198
3199static void __init prom_find_boot_cpu(void)
3200{
3201 __be32 rval;
3202 ihandle prom_cpu;
3203 phandle cpu_pkg;
3204
3205 rval = 0;
3206 if (prom_getprop(prom.chosen, "cpu", &rval, sizeof(rval)) <= 0)
3207 return;
3208 prom_cpu = be32_to_cpu(rval);
3209
3210 cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu);
3211
3212 if (!PHANDLE_VALID(cpu_pkg))
3213 return;
3214
3215 prom_getprop(cpu_pkg, "reg", &rval, sizeof(rval));
3216 prom.cpu = be32_to_cpu(rval);
3217
3218 prom_debug("Booting CPU hw index = %d\n", prom.cpu);
3219}
3220
3221static void __init prom_check_initrd(unsigned long r3, unsigned long r4)
3222{
3223#ifdef CONFIG_BLK_DEV_INITRD
3224 if (r3 && r4 && r4 != 0xdeadbeef) {
3225 __be64 val;
3226
3227 prom_initrd_start = is_kernel_addr(r3) ? __pa(r3) : r3;
3228 prom_initrd_end = prom_initrd_start + r4;
3229
3230 val = cpu_to_be64(prom_initrd_start);
3231 prom_setprop(prom.chosen, "/chosen", "linux,initrd-start",
3232 &val, sizeof(val));
3233 val = cpu_to_be64(prom_initrd_end);
3234 prom_setprop(prom.chosen, "/chosen", "linux,initrd-end",
3235 &val, sizeof(val));
3236
3237 reserve_mem(prom_initrd_start,
3238 prom_initrd_end - prom_initrd_start);
3239
3240 prom_debug("initrd_start=0x%lx\n", prom_initrd_start);
3241 prom_debug("initrd_end=0x%lx\n", prom_initrd_end);
3242 }
3243#endif /* CONFIG_BLK_DEV_INITRD */
3244}
3245
3246#ifdef CONFIG_PPC_SVM
3247/*
3248 * Perform the Enter Secure Mode ultracall.
3249 */
3250static int enter_secure_mode(unsigned long kbase, unsigned long fdt)
3251{
3252 register unsigned long r3 asm("r3") = UV_ESM;
3253 register unsigned long r4 asm("r4") = kbase;
3254 register unsigned long r5 asm("r5") = fdt;
3255
3256 asm volatile("sc 2" : "+r"(r3) : "r"(r4), "r"(r5));
3257
3258 return r3;
3259}
3260
3261/*
3262 * Call the Ultravisor to transfer us to secure memory if we have an ESM blob.
3263 */
3264static void __init setup_secure_guest(unsigned long kbase, unsigned long fdt)
3265{
3266 int ret;
3267
3268 if (!prom_svm_enable)
3269 return;
3270
3271 /* Switch to secure mode. */
3272 prom_printf("Switching to secure mode.\n");
3273
3274 /*
3275 * The ultravisor will do an integrity check of the kernel image but we
3276 * relocated it so the check will fail. Restore the original image by
3277 * relocating it back to the kernel virtual base address.
3278 */
3279 relocate(KERNELBASE);
3280
3281 ret = enter_secure_mode(kbase, fdt);
3282
3283 /* Relocate the kernel again. */
3284 relocate(kbase);
3285
3286 if (ret != U_SUCCESS) {
3287 prom_printf("Returned %d from switching to secure mode.\n", ret);
3288 prom_rtas_os_term("Switch to secure mode failed.\n");
3289 }
3290}
3291#else
3292static void __init setup_secure_guest(unsigned long kbase, unsigned long fdt)
3293{
3294}
3295#endif /* CONFIG_PPC_SVM */
3296
3297/*
3298 * We enter here early on, when the Open Firmware prom is still
3299 * handling exceptions and the MMU hash table for us.
3300 */
3301
3302unsigned long __init prom_init(unsigned long r3, unsigned long r4,
3303 unsigned long pp,
3304 unsigned long r6, unsigned long r7,
3305 unsigned long kbase)
3306{
3307 unsigned long hdr;
3308
3309#ifdef CONFIG_PPC32
3310 unsigned long offset = reloc_offset();
3311 reloc_got2(offset);
3312#endif
3313
3314 /*
3315 * First zero the BSS
3316 */
3317 memset(&__bss_start, 0, __bss_stop - __bss_start);
3318
3319 /*
3320 * Init interface to Open Firmware, get some node references,
3321 * like /chosen
3322 */
3323 prom_init_client_services(pp);
3324
3325 /*
3326 * See if this OF is old enough that we need to do explicit maps
3327 * and other workarounds
3328 */
3329 prom_find_mmu();
3330
3331 /*
3332 * Init prom stdout device
3333 */
3334 prom_init_stdout();
3335
3336 prom_printf("Preparing to boot %s", linux_banner);
3337
3338 /*
3339 * Get default machine type. At this point, we do not differentiate
3340 * between pSeries SMP and pSeries LPAR
3341 */
3342 of_platform = prom_find_machine_type();
3343 prom_printf("Detected machine type: %x\n", of_platform);
3344
3345#ifndef CONFIG_NONSTATIC_KERNEL
3346 /* Bail if this is a kdump kernel. */
3347 if (PHYSICAL_START > 0)
3348 prom_panic("Error: You can't boot a kdump kernel from OF!\n");
3349#endif
3350
3351 /*
3352 * Check for an initrd
3353 */
3354 prom_check_initrd(r3, r4);
3355
3356 /*
3357 * Do early parsing of command line
3358 */
3359 early_cmdline_parse();
3360
3361#ifdef CONFIG_PPC_PSERIES
3362 /*
3363 * On pSeries, inform the firmware about our capabilities
3364 */
3365 if (of_platform == PLATFORM_PSERIES ||
3366 of_platform == PLATFORM_PSERIES_LPAR)
3367 prom_send_capabilities();
3368#endif
3369
3370 /*
3371 * Copy the CPU hold code
3372 */
3373 if (of_platform != PLATFORM_POWERMAC)
3374 copy_and_flush(0, kbase, 0x100, 0);
3375
3376 /*
3377 * Initialize memory management within prom_init
3378 */
3379 prom_init_mem();
3380
3381 /*
3382 * Determine which cpu is actually running right _now_
3383 */
3384 prom_find_boot_cpu();
3385
3386 /*
3387 * Initialize display devices
3388 */
3389 prom_check_displays();
3390
3391#if defined(CONFIG_PPC64) && defined(__BIG_ENDIAN__)
3392 /*
3393 * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else
3394 * that uses the allocator, we need to make sure we get the top of memory
3395 * available for us here...
3396 */
3397 if (of_platform == PLATFORM_PSERIES)
3398 prom_initialize_tce_table();
3399#endif
3400
3401 /*
3402 * On non-powermacs, try to instantiate RTAS. PowerMacs don't
3403 * have a usable RTAS implementation.
3404 */
3405 if (of_platform != PLATFORM_POWERMAC)
3406 prom_instantiate_rtas();
3407
3408#ifdef CONFIG_PPC64
3409 /* instantiate sml */
3410 prom_instantiate_sml();
3411#endif
3412
3413 /*
3414 * On non-powermacs, put all CPUs in spin-loops.
3415 *
3416 * PowerMacs use a different mechanism to spin CPUs
3417 *
3418 * (This must be done after instanciating RTAS)
3419 */
3420 if (of_platform != PLATFORM_POWERMAC)
3421 prom_hold_cpus();
3422
3423 /*
3424 * Fill in some infos for use by the kernel later on
3425 */
3426 if (prom_memory_limit) {
3427 __be64 val = cpu_to_be64(prom_memory_limit);
3428 prom_setprop(prom.chosen, "/chosen", "linux,memory-limit",
3429 &val, sizeof(val));
3430 }
3431#ifdef CONFIG_PPC64
3432 if (prom_iommu_off)
3433 prom_setprop(prom.chosen, "/chosen", "linux,iommu-off",
3434 NULL, 0);
3435
3436 if (prom_iommu_force_on)
3437 prom_setprop(prom.chosen, "/chosen", "linux,iommu-force-on",
3438 NULL, 0);
3439
3440 if (prom_tce_alloc_start) {
3441 prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-start",
3442 &prom_tce_alloc_start,
3443 sizeof(prom_tce_alloc_start));
3444 prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-end",
3445 &prom_tce_alloc_end,
3446 sizeof(prom_tce_alloc_end));
3447 }
3448#endif
3449
3450 /*
3451 * Fixup any known bugs in the device-tree
3452 */
3453 fixup_device_tree();
3454
3455 /*
3456 * Now finally create the flattened device-tree
3457 */
3458 prom_printf("copying OF device tree...\n");
3459 flatten_device_tree();
3460
3461 /*
3462 * in case stdin is USB and still active on IBM machines...
3463 * Unfortunately quiesce crashes on some powermacs if we have
3464 * closed stdin already (in particular the powerbook 101).
3465 */
3466 if (of_platform != PLATFORM_POWERMAC)
3467 prom_close_stdin();
3468
3469 /*
3470 * Call OF "quiesce" method to shut down pending DMA's from
3471 * devices etc...
3472 */
3473 prom_printf("Quiescing Open Firmware ...\n");
3474 call_prom("quiesce", 0, 0);
3475
3476 /*
3477 * And finally, call the kernel passing it the flattened device
3478 * tree and NULL as r5, thus triggering the new entry point which
3479 * is common to us and kexec
3480 */
3481 hdr = dt_header_start;
3482
3483 prom_printf("Booting Linux via __start() @ 0x%lx ...\n", kbase);
3484 prom_debug("->dt_header_start=0x%lx\n", hdr);
3485
3486#ifdef CONFIG_PPC32
3487 reloc_got2(-offset);
3488#endif
3489
3490 /* Move to secure memory if we're supposed to be secure guests. */
3491 setup_secure_guest(kbase, hdr);
3492
3493 __start(hdr, kbase, 0, 0, 0, 0, 0);
3494
3495 return 0;
3496}
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}