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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/*
2 * Procedures for interfacing to Open Firmware.
3 *
4 * Paul Mackerras August 1996.
5 * Copyright (C) 1996-2005 Paul Mackerras.
6 *
7 * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner.
8 * {engebret|bergner}@us.ibm.com
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 */
15
16#undef DEBUG_PROM
17
18#include <stdarg.h>
19#include <linux/kernel.h>
20#include <linux/string.h>
21#include <linux/init.h>
22#include <linux/threads.h>
23#include <linux/spinlock.h>
24#include <linux/types.h>
25#include <linux/pci.h>
26#include <linux/proc_fs.h>
27#include <linux/stringify.h>
28#include <linux/delay.h>
29#include <linux/initrd.h>
30#include <linux/bitops.h>
31#include <asm/prom.h>
32#include <asm/rtas.h>
33#include <asm/page.h>
34#include <asm/processor.h>
35#include <asm/irq.h>
36#include <asm/io.h>
37#include <asm/smp.h>
38#include <asm/mmu.h>
39#include <asm/pgtable.h>
40#include <asm/iommu.h>
41#include <asm/btext.h>
42#include <asm/sections.h>
43#include <asm/machdep.h>
44#include <asm/opal.h>
45#include <asm/asm-prototypes.h>
46
47#include <linux/linux_logo.h>
48
49/*
50 * Eventually bump that one up
51 */
52#define DEVTREE_CHUNK_SIZE 0x100000
53
54/*
55 * This is the size of the local memory reserve map that gets copied
56 * into the boot params passed to the kernel. That size is totally
57 * flexible as the kernel just reads the list until it encounters an
58 * entry with size 0, so it can be changed without breaking binary
59 * compatibility
60 */
61#define MEM_RESERVE_MAP_SIZE 8
62
63/*
64 * prom_init() is called very early on, before the kernel text
65 * and data have been mapped to KERNELBASE. At this point the code
66 * is running at whatever address it has been loaded at.
67 * On ppc32 we compile with -mrelocatable, which means that references
68 * to extern and static variables get relocated automatically.
69 * ppc64 objects are always relocatable, we just need to relocate the
70 * TOC.
71 *
72 * Because OF may have mapped I/O devices into the area starting at
73 * KERNELBASE, particularly on CHRP machines, we can't safely call
74 * OF once the kernel has been mapped to KERNELBASE. Therefore all
75 * OF calls must be done within prom_init().
76 *
77 * ADDR is used in calls to call_prom. The 4th and following
78 * arguments to call_prom should be 32-bit values.
79 * On ppc64, 64 bit values are truncated to 32 bits (and
80 * fortunately don't get interpreted as two arguments).
81 */
82#define ADDR(x) (u32)(unsigned long)(x)
83
84#ifdef CONFIG_PPC64
85#define OF_WORKAROUNDS 0
86#else
87#define OF_WORKAROUNDS of_workarounds
88int of_workarounds;
89#endif
90
91#define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */
92#define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */
93
94#define PROM_BUG() do { \
95 prom_printf("kernel BUG at %s line 0x%x!\n", \
96 __FILE__, __LINE__); \
97 __asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \
98} while (0)
99
100#ifdef DEBUG_PROM
101#define prom_debug(x...) prom_printf(x)
102#else
103#define prom_debug(x...)
104#endif
105
106
107typedef u32 prom_arg_t;
108
109struct prom_args {
110 __be32 service;
111 __be32 nargs;
112 __be32 nret;
113 __be32 args[10];
114};
115
116struct prom_t {
117 ihandle root;
118 phandle chosen;
119 int cpu;
120 ihandle stdout;
121 ihandle mmumap;
122 ihandle memory;
123};
124
125struct mem_map_entry {
126 __be64 base;
127 __be64 size;
128};
129
130typedef __be32 cell_t;
131
132extern void __start(unsigned long r3, unsigned long r4, unsigned long r5,
133 unsigned long r6, unsigned long r7, unsigned long r8,
134 unsigned long r9);
135
136#ifdef CONFIG_PPC64
137extern int enter_prom(struct prom_args *args, unsigned long entry);
138#else
139static inline int enter_prom(struct prom_args *args, unsigned long entry)
140{
141 return ((int (*)(struct prom_args *))entry)(args);
142}
143#endif
144
145extern void copy_and_flush(unsigned long dest, unsigned long src,
146 unsigned long size, unsigned long offset);
147
148/* prom structure */
149static struct prom_t __initdata prom;
150
151static unsigned long prom_entry __initdata;
152
153#define PROM_SCRATCH_SIZE 256
154
155static char __initdata of_stdout_device[256];
156static char __initdata prom_scratch[PROM_SCRATCH_SIZE];
157
158static unsigned long __initdata dt_header_start;
159static unsigned long __initdata dt_struct_start, dt_struct_end;
160static unsigned long __initdata dt_string_start, dt_string_end;
161
162static unsigned long __initdata prom_initrd_start, prom_initrd_end;
163
164#ifdef CONFIG_PPC64
165static int __initdata prom_iommu_force_on;
166static int __initdata prom_iommu_off;
167static unsigned long __initdata prom_tce_alloc_start;
168static unsigned long __initdata prom_tce_alloc_end;
169#endif
170
171/* Platforms codes are now obsolete in the kernel. Now only used within this
172 * file and ultimately gone too. Feel free to change them if you need, they
173 * are not shared with anything outside of this file anymore
174 */
175#define PLATFORM_PSERIES 0x0100
176#define PLATFORM_PSERIES_LPAR 0x0101
177#define PLATFORM_LPAR 0x0001
178#define PLATFORM_POWERMAC 0x0400
179#define PLATFORM_GENERIC 0x0500
180#define PLATFORM_OPAL 0x0600
181
182static int __initdata of_platform;
183
184static char __initdata prom_cmd_line[COMMAND_LINE_SIZE];
185
186static unsigned long __initdata prom_memory_limit;
187
188static unsigned long __initdata alloc_top;
189static unsigned long __initdata alloc_top_high;
190static unsigned long __initdata alloc_bottom;
191static unsigned long __initdata rmo_top;
192static unsigned long __initdata ram_top;
193
194static struct mem_map_entry __initdata mem_reserve_map[MEM_RESERVE_MAP_SIZE];
195static int __initdata mem_reserve_cnt;
196
197static cell_t __initdata regbuf[1024];
198
199static bool rtas_has_query_cpu_stopped;
200
201
202/*
203 * Error results ... some OF calls will return "-1" on error, some
204 * will return 0, some will return either. To simplify, here are
205 * macros to use with any ihandle or phandle return value to check if
206 * it is valid
207 */
208
209#define PROM_ERROR (-1u)
210#define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR)
211#define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR)
212
213
214/* This is the one and *ONLY* place where we actually call open
215 * firmware.
216 */
217
218static int __init call_prom(const char *service, int nargs, int nret, ...)
219{
220 int i;
221 struct prom_args args;
222 va_list list;
223
224 args.service = cpu_to_be32(ADDR(service));
225 args.nargs = cpu_to_be32(nargs);
226 args.nret = cpu_to_be32(nret);
227
228 va_start(list, nret);
229 for (i = 0; i < nargs; i++)
230 args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
231 va_end(list);
232
233 for (i = 0; i < nret; i++)
234 args.args[nargs+i] = 0;
235
236 if (enter_prom(&args, prom_entry) < 0)
237 return PROM_ERROR;
238
239 return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
240}
241
242static int __init call_prom_ret(const char *service, int nargs, int nret,
243 prom_arg_t *rets, ...)
244{
245 int i;
246 struct prom_args args;
247 va_list list;
248
249 args.service = cpu_to_be32(ADDR(service));
250 args.nargs = cpu_to_be32(nargs);
251 args.nret = cpu_to_be32(nret);
252
253 va_start(list, rets);
254 for (i = 0; i < nargs; i++)
255 args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
256 va_end(list);
257
258 for (i = 0; i < nret; i++)
259 args.args[nargs+i] = 0;
260
261 if (enter_prom(&args, prom_entry) < 0)
262 return PROM_ERROR;
263
264 if (rets != NULL)
265 for (i = 1; i < nret; ++i)
266 rets[i-1] = be32_to_cpu(args.args[nargs+i]);
267
268 return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
269}
270
271
272static void __init prom_print(const char *msg)
273{
274 const char *p, *q;
275
276 if (prom.stdout == 0)
277 return;
278
279 for (p = msg; *p != 0; p = q) {
280 for (q = p; *q != 0 && *q != '\n'; ++q)
281 ;
282 if (q > p)
283 call_prom("write", 3, 1, prom.stdout, p, q - p);
284 if (*q == 0)
285 break;
286 ++q;
287 call_prom("write", 3, 1, prom.stdout, ADDR("\r\n"), 2);
288 }
289}
290
291
292static void __init prom_print_hex(unsigned long val)
293{
294 int i, nibbles = sizeof(val)*2;
295 char buf[sizeof(val)*2+1];
296
297 for (i = nibbles-1; i >= 0; i--) {
298 buf[i] = (val & 0xf) + '0';
299 if (buf[i] > '9')
300 buf[i] += ('a'-'0'-10);
301 val >>= 4;
302 }
303 buf[nibbles] = '\0';
304 call_prom("write", 3, 1, prom.stdout, buf, nibbles);
305}
306
307/* max number of decimal digits in an unsigned long */
308#define UL_DIGITS 21
309static void __init prom_print_dec(unsigned long val)
310{
311 int i, size;
312 char buf[UL_DIGITS+1];
313
314 for (i = UL_DIGITS-1; i >= 0; i--) {
315 buf[i] = (val % 10) + '0';
316 val = val/10;
317 if (val == 0)
318 break;
319 }
320 /* shift stuff down */
321 size = UL_DIGITS - i;
322 call_prom("write", 3, 1, prom.stdout, buf+i, size);
323}
324
325static void __init prom_printf(const char *format, ...)
326{
327 const char *p, *q, *s;
328 va_list args;
329 unsigned long v;
330 long vs;
331
332 va_start(args, format);
333 for (p = format; *p != 0; p = q) {
334 for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q)
335 ;
336 if (q > p)
337 call_prom("write", 3, 1, prom.stdout, p, q - p);
338 if (*q == 0)
339 break;
340 if (*q == '\n') {
341 ++q;
342 call_prom("write", 3, 1, prom.stdout,
343 ADDR("\r\n"), 2);
344 continue;
345 }
346 ++q;
347 if (*q == 0)
348 break;
349 switch (*q) {
350 case 's':
351 ++q;
352 s = va_arg(args, const char *);
353 prom_print(s);
354 break;
355 case 'x':
356 ++q;
357 v = va_arg(args, unsigned long);
358 prom_print_hex(v);
359 break;
360 case 'd':
361 ++q;
362 vs = va_arg(args, int);
363 if (vs < 0) {
364 prom_print("-");
365 vs = -vs;
366 }
367 prom_print_dec(vs);
368 break;
369 case 'l':
370 ++q;
371 if (*q == 0)
372 break;
373 else if (*q == 'x') {
374 ++q;
375 v = va_arg(args, unsigned long);
376 prom_print_hex(v);
377 } else if (*q == 'u') { /* '%lu' */
378 ++q;
379 v = va_arg(args, unsigned long);
380 prom_print_dec(v);
381 } else if (*q == 'd') { /* %ld */
382 ++q;
383 vs = va_arg(args, long);
384 if (vs < 0) {
385 prom_print("-");
386 vs = -vs;
387 }
388 prom_print_dec(vs);
389 }
390 break;
391 }
392 }
393 va_end(args);
394}
395
396
397static unsigned int __init prom_claim(unsigned long virt, unsigned long size,
398 unsigned long align)
399{
400
401 if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) {
402 /*
403 * Old OF requires we claim physical and virtual separately
404 * and then map explicitly (assuming virtual mode)
405 */
406 int ret;
407 prom_arg_t result;
408
409 ret = call_prom_ret("call-method", 5, 2, &result,
410 ADDR("claim"), prom.memory,
411 align, size, virt);
412 if (ret != 0 || result == -1)
413 return -1;
414 ret = call_prom_ret("call-method", 5, 2, &result,
415 ADDR("claim"), prom.mmumap,
416 align, size, virt);
417 if (ret != 0) {
418 call_prom("call-method", 4, 1, ADDR("release"),
419 prom.memory, size, virt);
420 return -1;
421 }
422 /* the 0x12 is M (coherence) + PP == read/write */
423 call_prom("call-method", 6, 1,
424 ADDR("map"), prom.mmumap, 0x12, size, virt, virt);
425 return virt;
426 }
427 return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size,
428 (prom_arg_t)align);
429}
430
431static void __init __attribute__((noreturn)) prom_panic(const char *reason)
432{
433 prom_print(reason);
434 /* Do not call exit because it clears the screen on pmac
435 * it also causes some sort of double-fault on early pmacs */
436 if (of_platform == PLATFORM_POWERMAC)
437 asm("trap\n");
438
439 /* ToDo: should put up an SRC here on pSeries */
440 call_prom("exit", 0, 0);
441
442 for (;;) /* should never get here */
443 ;
444}
445
446
447static int __init prom_next_node(phandle *nodep)
448{
449 phandle node;
450
451 if ((node = *nodep) != 0
452 && (*nodep = call_prom("child", 1, 1, node)) != 0)
453 return 1;
454 if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
455 return 1;
456 for (;;) {
457 if ((node = call_prom("parent", 1, 1, node)) == 0)
458 return 0;
459 if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
460 return 1;
461 }
462}
463
464static inline int prom_getprop(phandle node, const char *pname,
465 void *value, size_t valuelen)
466{
467 return call_prom("getprop", 4, 1, node, ADDR(pname),
468 (u32)(unsigned long) value, (u32) valuelen);
469}
470
471static inline int prom_getproplen(phandle node, const char *pname)
472{
473 return call_prom("getproplen", 2, 1, node, ADDR(pname));
474}
475
476static void add_string(char **str, const char *q)
477{
478 char *p = *str;
479
480 while (*q)
481 *p++ = *q++;
482 *p++ = ' ';
483 *str = p;
484}
485
486static char *tohex(unsigned int x)
487{
488 static char digits[] = "0123456789abcdef";
489 static char result[9];
490 int i;
491
492 result[8] = 0;
493 i = 8;
494 do {
495 --i;
496 result[i] = digits[x & 0xf];
497 x >>= 4;
498 } while (x != 0 && i > 0);
499 return &result[i];
500}
501
502static int __init prom_setprop(phandle node, const char *nodename,
503 const char *pname, void *value, size_t valuelen)
504{
505 char cmd[256], *p;
506
507 if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL))
508 return call_prom("setprop", 4, 1, node, ADDR(pname),
509 (u32)(unsigned long) value, (u32) valuelen);
510
511 /* gah... setprop doesn't work on longtrail, have to use interpret */
512 p = cmd;
513 add_string(&p, "dev");
514 add_string(&p, nodename);
515 add_string(&p, tohex((u32)(unsigned long) value));
516 add_string(&p, tohex(valuelen));
517 add_string(&p, tohex(ADDR(pname)));
518 add_string(&p, tohex(strlen(pname)));
519 add_string(&p, "property");
520 *p = 0;
521 return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd);
522}
523
524/* We can't use the standard versions because of relocation headaches. */
525#define isxdigit(c) (('0' <= (c) && (c) <= '9') \
526 || ('a' <= (c) && (c) <= 'f') \
527 || ('A' <= (c) && (c) <= 'F'))
528
529#define isdigit(c) ('0' <= (c) && (c) <= '9')
530#define islower(c) ('a' <= (c) && (c) <= 'z')
531#define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c))
532
533static unsigned long prom_strtoul(const char *cp, const char **endp)
534{
535 unsigned long result = 0, base = 10, value;
536
537 if (*cp == '0') {
538 base = 8;
539 cp++;
540 if (toupper(*cp) == 'X') {
541 cp++;
542 base = 16;
543 }
544 }
545
546 while (isxdigit(*cp) &&
547 (value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) {
548 result = result * base + value;
549 cp++;
550 }
551
552 if (endp)
553 *endp = cp;
554
555 return result;
556}
557
558static unsigned long prom_memparse(const char *ptr, const char **retptr)
559{
560 unsigned long ret = prom_strtoul(ptr, retptr);
561 int shift = 0;
562
563 /*
564 * We can't use a switch here because GCC *may* generate a
565 * jump table which won't work, because we're not running at
566 * the address we're linked at.
567 */
568 if ('G' == **retptr || 'g' == **retptr)
569 shift = 30;
570
571 if ('M' == **retptr || 'm' == **retptr)
572 shift = 20;
573
574 if ('K' == **retptr || 'k' == **retptr)
575 shift = 10;
576
577 if (shift) {
578 ret <<= shift;
579 (*retptr)++;
580 }
581
582 return ret;
583}
584
585/*
586 * Early parsing of the command line passed to the kernel, used for
587 * "mem=x" and the options that affect the iommu
588 */
589static void __init early_cmdline_parse(void)
590{
591 const char *opt;
592
593 char *p;
594 int l = 0;
595
596 prom_cmd_line[0] = 0;
597 p = prom_cmd_line;
598 if ((long)prom.chosen > 0)
599 l = prom_getprop(prom.chosen, "bootargs", p, COMMAND_LINE_SIZE-1);
600#ifdef CONFIG_CMDLINE
601 if (l <= 0 || p[0] == '\0') /* dbl check */
602 strlcpy(prom_cmd_line,
603 CONFIG_CMDLINE, sizeof(prom_cmd_line));
604#endif /* CONFIG_CMDLINE */
605 prom_printf("command line: %s\n", prom_cmd_line);
606
607#ifdef CONFIG_PPC64
608 opt = strstr(prom_cmd_line, "iommu=");
609 if (opt) {
610 prom_printf("iommu opt is: %s\n", opt);
611 opt += 6;
612 while (*opt && *opt == ' ')
613 opt++;
614 if (!strncmp(opt, "off", 3))
615 prom_iommu_off = 1;
616 else if (!strncmp(opt, "force", 5))
617 prom_iommu_force_on = 1;
618 }
619#endif
620 opt = strstr(prom_cmd_line, "mem=");
621 if (opt) {
622 opt += 4;
623 prom_memory_limit = prom_memparse(opt, (const char **)&opt);
624#ifdef CONFIG_PPC64
625 /* Align to 16 MB == size of ppc64 large page */
626 prom_memory_limit = ALIGN(prom_memory_limit, 0x1000000);
627#endif
628 }
629}
630
631#if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
632/*
633 * The architecture vector has an array of PVR mask/value pairs,
634 * followed by # option vectors - 1, followed by the option vectors.
635 *
636 * See prom.h for the definition of the bits specified in the
637 * architecture vector.
638 */
639
640/* Firmware expects the value to be n - 1, where n is the # of vectors */
641#define NUM_VECTORS(n) ((n) - 1)
642
643/*
644 * Firmware expects 1 + n - 2, where n is the length of the option vector in
645 * bytes. The 1 accounts for the length byte itself, the - 2 .. ?
646 */
647#define VECTOR_LENGTH(n) (1 + (n) - 2)
648
649struct option_vector1 {
650 u8 byte1;
651 u8 arch_versions;
652} __packed;
653
654struct option_vector2 {
655 u8 byte1;
656 __be16 reserved;
657 __be32 real_base;
658 __be32 real_size;
659 __be32 virt_base;
660 __be32 virt_size;
661 __be32 load_base;
662 __be32 min_rma;
663 __be32 min_load;
664 u8 min_rma_percent;
665 u8 max_pft_size;
666} __packed;
667
668struct option_vector3 {
669 u8 byte1;
670 u8 byte2;
671} __packed;
672
673struct option_vector4 {
674 u8 byte1;
675 u8 min_vp_cap;
676} __packed;
677
678struct option_vector5 {
679 u8 byte1;
680 u8 byte2;
681 u8 byte3;
682 u8 cmo;
683 u8 associativity;
684 u8 bin_opts;
685 u8 micro_checkpoint;
686 u8 reserved0;
687 __be32 max_cpus;
688 __be16 papr_level;
689 __be16 reserved1;
690 u8 platform_facilities;
691 u8 reserved2;
692 __be16 reserved3;
693 u8 subprocessors;
694} __packed;
695
696struct option_vector6 {
697 u8 reserved;
698 u8 secondary_pteg;
699 u8 os_name;
700} __packed;
701
702struct ibm_arch_vec {
703 struct { u32 mask, val; } pvrs[10];
704
705 u8 num_vectors;
706
707 u8 vec1_len;
708 struct option_vector1 vec1;
709
710 u8 vec2_len;
711 struct option_vector2 vec2;
712
713 u8 vec3_len;
714 struct option_vector3 vec3;
715
716 u8 vec4_len;
717 struct option_vector4 vec4;
718
719 u8 vec5_len;
720 struct option_vector5 vec5;
721
722 u8 vec6_len;
723 struct option_vector6 vec6;
724} __packed;
725
726struct ibm_arch_vec __cacheline_aligned ibm_architecture_vec = {
727 .pvrs = {
728 {
729 .mask = cpu_to_be32(0xfffe0000), /* POWER5/POWER5+ */
730 .val = cpu_to_be32(0x003a0000),
731 },
732 {
733 .mask = cpu_to_be32(0xffff0000), /* POWER6 */
734 .val = cpu_to_be32(0x003e0000),
735 },
736 {
737 .mask = cpu_to_be32(0xffff0000), /* POWER7 */
738 .val = cpu_to_be32(0x003f0000),
739 },
740 {
741 .mask = cpu_to_be32(0xffff0000), /* POWER8E */
742 .val = cpu_to_be32(0x004b0000),
743 },
744 {
745 .mask = cpu_to_be32(0xffff0000), /* POWER8NVL */
746 .val = cpu_to_be32(0x004c0000),
747 },
748 {
749 .mask = cpu_to_be32(0xffff0000), /* POWER8 */
750 .val = cpu_to_be32(0x004d0000),
751 },
752 {
753 .mask = cpu_to_be32(0xffffffff), /* all 2.07-compliant */
754 .val = cpu_to_be32(0x0f000004),
755 },
756 {
757 .mask = cpu_to_be32(0xffffffff), /* all 2.06-compliant */
758 .val = cpu_to_be32(0x0f000003),
759 },
760 {
761 .mask = cpu_to_be32(0xffffffff), /* all 2.05-compliant */
762 .val = cpu_to_be32(0x0f000002),
763 },
764 {
765 .mask = cpu_to_be32(0xfffffffe), /* all 2.04-compliant and earlier */
766 .val = cpu_to_be32(0x0f000001),
767 },
768 },
769
770 .num_vectors = NUM_VECTORS(6),
771
772 .vec1_len = VECTOR_LENGTH(sizeof(struct option_vector1)),
773 .vec1 = {
774 .byte1 = 0,
775 .arch_versions = OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 |
776 OV1_PPC_2_04 | OV1_PPC_2_05 | OV1_PPC_2_06 | OV1_PPC_2_07,
777 },
778
779 .vec2_len = VECTOR_LENGTH(sizeof(struct option_vector2)),
780 /* option vector 2: Open Firmware options supported */
781 .vec2 = {
782 .byte1 = OV2_REAL_MODE,
783 .reserved = 0,
784 .real_base = cpu_to_be32(0xffffffff),
785 .real_size = cpu_to_be32(0xffffffff),
786 .virt_base = cpu_to_be32(0xffffffff),
787 .virt_size = cpu_to_be32(0xffffffff),
788 .load_base = cpu_to_be32(0xffffffff),
789 .min_rma = cpu_to_be32(256), /* 256MB min RMA */
790 .min_load = cpu_to_be32(0xffffffff), /* full client load */
791 .min_rma_percent = 0, /* min RMA percentage of total RAM */
792 .max_pft_size = 48, /* max log_2(hash table size) */
793 },
794
795 .vec3_len = VECTOR_LENGTH(sizeof(struct option_vector3)),
796 /* option vector 3: processor options supported */
797 .vec3 = {
798 .byte1 = 0, /* don't ignore, don't halt */
799 .byte2 = OV3_FP | OV3_VMX | OV3_DFP,
800 },
801
802 .vec4_len = VECTOR_LENGTH(sizeof(struct option_vector4)),
803 /* option vector 4: IBM PAPR implementation */
804 .vec4 = {
805 .byte1 = 0, /* don't halt */
806 .min_vp_cap = OV4_MIN_ENT_CAP, /* minimum VP entitled capacity */
807 },
808
809 .vec5_len = VECTOR_LENGTH(sizeof(struct option_vector5)),
810 /* option vector 5: PAPR/OF options */
811 .vec5 = {
812 .byte1 = 0, /* don't ignore, don't halt */
813 .byte2 = OV5_FEAT(OV5_LPAR) | OV5_FEAT(OV5_SPLPAR) | OV5_FEAT(OV5_LARGE_PAGES) |
814 OV5_FEAT(OV5_DRCONF_MEMORY) | OV5_FEAT(OV5_DONATE_DEDICATE_CPU) |
815#ifdef CONFIG_PCI_MSI
816 /* PCIe/MSI support. Without MSI full PCIe is not supported */
817 OV5_FEAT(OV5_MSI),
818#else
819 0,
820#endif
821 .byte3 = 0,
822 .cmo =
823#ifdef CONFIG_PPC_SMLPAR
824 OV5_FEAT(OV5_CMO) | OV5_FEAT(OV5_XCMO),
825#else
826 0,
827#endif
828 .associativity = OV5_FEAT(OV5_TYPE1_AFFINITY) | OV5_FEAT(OV5_PRRN),
829 .bin_opts = 0,
830 .micro_checkpoint = 0,
831 .reserved0 = 0,
832 .max_cpus = cpu_to_be32(NR_CPUS), /* number of cores supported */
833 .papr_level = 0,
834 .reserved1 = 0,
835 .platform_facilities = OV5_FEAT(OV5_PFO_HW_RNG) | OV5_FEAT(OV5_PFO_HW_ENCR) | OV5_FEAT(OV5_PFO_HW_842),
836 .reserved2 = 0,
837 .reserved3 = 0,
838 .subprocessors = 1,
839 },
840
841 /* option vector 6: IBM PAPR hints */
842 .vec6_len = VECTOR_LENGTH(sizeof(struct option_vector6)),
843 .vec6 = {
844 .reserved = 0,
845 .secondary_pteg = 0,
846 .os_name = OV6_LINUX,
847 },
848};
849
850/* Old method - ELF header with PT_NOTE sections only works on BE */
851#ifdef __BIG_ENDIAN__
852static struct fake_elf {
853 Elf32_Ehdr elfhdr;
854 Elf32_Phdr phdr[2];
855 struct chrpnote {
856 u32 namesz;
857 u32 descsz;
858 u32 type;
859 char name[8]; /* "PowerPC" */
860 struct chrpdesc {
861 u32 real_mode;
862 u32 real_base;
863 u32 real_size;
864 u32 virt_base;
865 u32 virt_size;
866 u32 load_base;
867 } chrpdesc;
868 } chrpnote;
869 struct rpanote {
870 u32 namesz;
871 u32 descsz;
872 u32 type;
873 char name[24]; /* "IBM,RPA-Client-Config" */
874 struct rpadesc {
875 u32 lpar_affinity;
876 u32 min_rmo_size;
877 u32 min_rmo_percent;
878 u32 max_pft_size;
879 u32 splpar;
880 u32 min_load;
881 u32 new_mem_def;
882 u32 ignore_me;
883 } rpadesc;
884 } rpanote;
885} fake_elf = {
886 .elfhdr = {
887 .e_ident = { 0x7f, 'E', 'L', 'F',
888 ELFCLASS32, ELFDATA2MSB, EV_CURRENT },
889 .e_type = ET_EXEC, /* yeah right */
890 .e_machine = EM_PPC,
891 .e_version = EV_CURRENT,
892 .e_phoff = offsetof(struct fake_elf, phdr),
893 .e_phentsize = sizeof(Elf32_Phdr),
894 .e_phnum = 2
895 },
896 .phdr = {
897 [0] = {
898 .p_type = PT_NOTE,
899 .p_offset = offsetof(struct fake_elf, chrpnote),
900 .p_filesz = sizeof(struct chrpnote)
901 }, [1] = {
902 .p_type = PT_NOTE,
903 .p_offset = offsetof(struct fake_elf, rpanote),
904 .p_filesz = sizeof(struct rpanote)
905 }
906 },
907 .chrpnote = {
908 .namesz = sizeof("PowerPC"),
909 .descsz = sizeof(struct chrpdesc),
910 .type = 0x1275,
911 .name = "PowerPC",
912 .chrpdesc = {
913 .real_mode = ~0U, /* ~0 means "don't care" */
914 .real_base = ~0U,
915 .real_size = ~0U,
916 .virt_base = ~0U,
917 .virt_size = ~0U,
918 .load_base = ~0U
919 },
920 },
921 .rpanote = {
922 .namesz = sizeof("IBM,RPA-Client-Config"),
923 .descsz = sizeof(struct rpadesc),
924 .type = 0x12759999,
925 .name = "IBM,RPA-Client-Config",
926 .rpadesc = {
927 .lpar_affinity = 0,
928 .min_rmo_size = 64, /* in megabytes */
929 .min_rmo_percent = 0,
930 .max_pft_size = 48, /* 2^48 bytes max PFT size */
931 .splpar = 1,
932 .min_load = ~0U,
933 .new_mem_def = 0
934 }
935 }
936};
937#endif /* __BIG_ENDIAN__ */
938
939static int __init prom_count_smt_threads(void)
940{
941 phandle node;
942 char type[64];
943 unsigned int plen;
944
945 /* Pick up th first CPU node we can find */
946 for (node = 0; prom_next_node(&node); ) {
947 type[0] = 0;
948 prom_getprop(node, "device_type", type, sizeof(type));
949
950 if (strcmp(type, "cpu"))
951 continue;
952 /*
953 * There is an entry for each smt thread, each entry being
954 * 4 bytes long. All cpus should have the same number of
955 * smt threads, so return after finding the first.
956 */
957 plen = prom_getproplen(node, "ibm,ppc-interrupt-server#s");
958 if (plen == PROM_ERROR)
959 break;
960 plen >>= 2;
961 prom_debug("Found %lu smt threads per core\n", (unsigned long)plen);
962
963 /* Sanity check */
964 if (plen < 1 || plen > 64) {
965 prom_printf("Threads per core %lu out of bounds, assuming 1\n",
966 (unsigned long)plen);
967 return 1;
968 }
969 return plen;
970 }
971 prom_debug("No threads found, assuming 1 per core\n");
972
973 return 1;
974
975}
976
977
978static void __init prom_send_capabilities(void)
979{
980 ihandle root;
981 prom_arg_t ret;
982 u32 cores;
983
984 root = call_prom("open", 1, 1, ADDR("/"));
985 if (root != 0) {
986 /* We need to tell the FW about the number of cores we support.
987 *
988 * To do that, we count the number of threads on the first core
989 * (we assume this is the same for all cores) and use it to
990 * divide NR_CPUS.
991 */
992
993 cores = DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads());
994 prom_printf("Max number of cores passed to firmware: %lu (NR_CPUS = %lu)\n",
995 cores, NR_CPUS);
996
997 ibm_architecture_vec.vec5.max_cpus = cpu_to_be32(cores);
998
999 /* try calling the ibm,client-architecture-support method */
1000 prom_printf("Calling ibm,client-architecture-support...");
1001 if (call_prom_ret("call-method", 3, 2, &ret,
1002 ADDR("ibm,client-architecture-support"),
1003 root,
1004 ADDR(&ibm_architecture_vec)) == 0) {
1005 /* the call exists... */
1006 if (ret)
1007 prom_printf("\nWARNING: ibm,client-architecture"
1008 "-support call FAILED!\n");
1009 call_prom("close", 1, 0, root);
1010 prom_printf(" done\n");
1011 return;
1012 }
1013 call_prom("close", 1, 0, root);
1014 prom_printf(" not implemented\n");
1015 }
1016
1017#ifdef __BIG_ENDIAN__
1018 {
1019 ihandle elfloader;
1020
1021 /* no ibm,client-architecture-support call, try the old way */
1022 elfloader = call_prom("open", 1, 1,
1023 ADDR("/packages/elf-loader"));
1024 if (elfloader == 0) {
1025 prom_printf("couldn't open /packages/elf-loader\n");
1026 return;
1027 }
1028 call_prom("call-method", 3, 1, ADDR("process-elf-header"),
1029 elfloader, ADDR(&fake_elf));
1030 call_prom("close", 1, 0, elfloader);
1031 }
1032#endif /* __BIG_ENDIAN__ */
1033}
1034#endif /* #if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) */
1035
1036/*
1037 * Memory allocation strategy... our layout is normally:
1038 *
1039 * at 14Mb or more we have vmlinux, then a gap and initrd. In some
1040 * rare cases, initrd might end up being before the kernel though.
1041 * We assume this won't override the final kernel at 0, we have no
1042 * provision to handle that in this version, but it should hopefully
1043 * never happen.
1044 *
1045 * alloc_top is set to the top of RMO, eventually shrink down if the
1046 * TCEs overlap
1047 *
1048 * alloc_bottom is set to the top of kernel/initrd
1049 *
1050 * from there, allocations are done this way : rtas is allocated
1051 * topmost, and the device-tree is allocated from the bottom. We try
1052 * to grow the device-tree allocation as we progress. If we can't,
1053 * then we fail, we don't currently have a facility to restart
1054 * elsewhere, but that shouldn't be necessary.
1055 *
1056 * Note that calls to reserve_mem have to be done explicitly, memory
1057 * allocated with either alloc_up or alloc_down isn't automatically
1058 * reserved.
1059 */
1060
1061
1062/*
1063 * Allocates memory in the RMO upward from the kernel/initrd
1064 *
1065 * When align is 0, this is a special case, it means to allocate in place
1066 * at the current location of alloc_bottom or fail (that is basically
1067 * extending the previous allocation). Used for the device-tree flattening
1068 */
1069static unsigned long __init alloc_up(unsigned long size, unsigned long align)
1070{
1071 unsigned long base = alloc_bottom;
1072 unsigned long addr = 0;
1073
1074 if (align)
1075 base = _ALIGN_UP(base, align);
1076 prom_debug("alloc_up(%x, %x)\n", size, align);
1077 if (ram_top == 0)
1078 prom_panic("alloc_up() called with mem not initialized\n");
1079
1080 if (align)
1081 base = _ALIGN_UP(alloc_bottom, align);
1082 else
1083 base = alloc_bottom;
1084
1085 for(; (base + size) <= alloc_top;
1086 base = _ALIGN_UP(base + 0x100000, align)) {
1087 prom_debug(" trying: 0x%x\n\r", base);
1088 addr = (unsigned long)prom_claim(base, size, 0);
1089 if (addr != PROM_ERROR && addr != 0)
1090 break;
1091 addr = 0;
1092 if (align == 0)
1093 break;
1094 }
1095 if (addr == 0)
1096 return 0;
1097 alloc_bottom = addr + size;
1098
1099 prom_debug(" -> %x\n", addr);
1100 prom_debug(" alloc_bottom : %x\n", alloc_bottom);
1101 prom_debug(" alloc_top : %x\n", alloc_top);
1102 prom_debug(" alloc_top_hi : %x\n", alloc_top_high);
1103 prom_debug(" rmo_top : %x\n", rmo_top);
1104 prom_debug(" ram_top : %x\n", ram_top);
1105
1106 return addr;
1107}
1108
1109/*
1110 * Allocates memory downward, either from top of RMO, or if highmem
1111 * is set, from the top of RAM. Note that this one doesn't handle
1112 * failures. It does claim memory if highmem is not set.
1113 */
1114static unsigned long __init alloc_down(unsigned long size, unsigned long align,
1115 int highmem)
1116{
1117 unsigned long base, addr = 0;
1118
1119 prom_debug("alloc_down(%x, %x, %s)\n", size, align,
1120 highmem ? "(high)" : "(low)");
1121 if (ram_top == 0)
1122 prom_panic("alloc_down() called with mem not initialized\n");
1123
1124 if (highmem) {
1125 /* Carve out storage for the TCE table. */
1126 addr = _ALIGN_DOWN(alloc_top_high - size, align);
1127 if (addr <= alloc_bottom)
1128 return 0;
1129 /* Will we bump into the RMO ? If yes, check out that we
1130 * didn't overlap existing allocations there, if we did,
1131 * we are dead, we must be the first in town !
1132 */
1133 if (addr < rmo_top) {
1134 /* Good, we are first */
1135 if (alloc_top == rmo_top)
1136 alloc_top = rmo_top = addr;
1137 else
1138 return 0;
1139 }
1140 alloc_top_high = addr;
1141 goto bail;
1142 }
1143
1144 base = _ALIGN_DOWN(alloc_top - size, align);
1145 for (; base > alloc_bottom;
1146 base = _ALIGN_DOWN(base - 0x100000, align)) {
1147 prom_debug(" trying: 0x%x\n\r", base);
1148 addr = (unsigned long)prom_claim(base, size, 0);
1149 if (addr != PROM_ERROR && addr != 0)
1150 break;
1151 addr = 0;
1152 }
1153 if (addr == 0)
1154 return 0;
1155 alloc_top = addr;
1156
1157 bail:
1158 prom_debug(" -> %x\n", addr);
1159 prom_debug(" alloc_bottom : %x\n", alloc_bottom);
1160 prom_debug(" alloc_top : %x\n", alloc_top);
1161 prom_debug(" alloc_top_hi : %x\n", alloc_top_high);
1162 prom_debug(" rmo_top : %x\n", rmo_top);
1163 prom_debug(" ram_top : %x\n", ram_top);
1164
1165 return addr;
1166}
1167
1168/*
1169 * Parse a "reg" cell
1170 */
1171static unsigned long __init prom_next_cell(int s, cell_t **cellp)
1172{
1173 cell_t *p = *cellp;
1174 unsigned long r = 0;
1175
1176 /* Ignore more than 2 cells */
1177 while (s > sizeof(unsigned long) / 4) {
1178 p++;
1179 s--;
1180 }
1181 r = be32_to_cpu(*p++);
1182#ifdef CONFIG_PPC64
1183 if (s > 1) {
1184 r <<= 32;
1185 r |= be32_to_cpu(*(p++));
1186 }
1187#endif
1188 *cellp = p;
1189 return r;
1190}
1191
1192/*
1193 * Very dumb function for adding to the memory reserve list, but
1194 * we don't need anything smarter at this point
1195 *
1196 * XXX Eventually check for collisions. They should NEVER happen.
1197 * If problems seem to show up, it would be a good start to track
1198 * them down.
1199 */
1200static void __init reserve_mem(u64 base, u64 size)
1201{
1202 u64 top = base + size;
1203 unsigned long cnt = mem_reserve_cnt;
1204
1205 if (size == 0)
1206 return;
1207
1208 /* We need to always keep one empty entry so that we
1209 * have our terminator with "size" set to 0 since we are
1210 * dumb and just copy this entire array to the boot params
1211 */
1212 base = _ALIGN_DOWN(base, PAGE_SIZE);
1213 top = _ALIGN_UP(top, PAGE_SIZE);
1214 size = top - base;
1215
1216 if (cnt >= (MEM_RESERVE_MAP_SIZE - 1))
1217 prom_panic("Memory reserve map exhausted !\n");
1218 mem_reserve_map[cnt].base = cpu_to_be64(base);
1219 mem_reserve_map[cnt].size = cpu_to_be64(size);
1220 mem_reserve_cnt = cnt + 1;
1221}
1222
1223/*
1224 * Initialize memory allocation mechanism, parse "memory" nodes and
1225 * obtain that way the top of memory and RMO to setup out local allocator
1226 */
1227static void __init prom_init_mem(void)
1228{
1229 phandle node;
1230 char *path, type[64];
1231 unsigned int plen;
1232 cell_t *p, *endp;
1233 __be32 val;
1234 u32 rac, rsc;
1235
1236 /*
1237 * We iterate the memory nodes to find
1238 * 1) top of RMO (first node)
1239 * 2) top of memory
1240 */
1241 val = cpu_to_be32(2);
1242 prom_getprop(prom.root, "#address-cells", &val, sizeof(val));
1243 rac = be32_to_cpu(val);
1244 val = cpu_to_be32(1);
1245 prom_getprop(prom.root, "#size-cells", &val, sizeof(rsc));
1246 rsc = be32_to_cpu(val);
1247 prom_debug("root_addr_cells: %x\n", rac);
1248 prom_debug("root_size_cells: %x\n", rsc);
1249
1250 prom_debug("scanning memory:\n");
1251 path = prom_scratch;
1252
1253 for (node = 0; prom_next_node(&node); ) {
1254 type[0] = 0;
1255 prom_getprop(node, "device_type", type, sizeof(type));
1256
1257 if (type[0] == 0) {
1258 /*
1259 * CHRP Longtrail machines have no device_type
1260 * on the memory node, so check the name instead...
1261 */
1262 prom_getprop(node, "name", type, sizeof(type));
1263 }
1264 if (strcmp(type, "memory"))
1265 continue;
1266
1267 plen = prom_getprop(node, "reg", regbuf, sizeof(regbuf));
1268 if (plen > sizeof(regbuf)) {
1269 prom_printf("memory node too large for buffer !\n");
1270 plen = sizeof(regbuf);
1271 }
1272 p = regbuf;
1273 endp = p + (plen / sizeof(cell_t));
1274
1275#ifdef DEBUG_PROM
1276 memset(path, 0, PROM_SCRATCH_SIZE);
1277 call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1);
1278 prom_debug(" node %s :\n", path);
1279#endif /* DEBUG_PROM */
1280
1281 while ((endp - p) >= (rac + rsc)) {
1282 unsigned long base, size;
1283
1284 base = prom_next_cell(rac, &p);
1285 size = prom_next_cell(rsc, &p);
1286
1287 if (size == 0)
1288 continue;
1289 prom_debug(" %x %x\n", base, size);
1290 if (base == 0 && (of_platform & PLATFORM_LPAR))
1291 rmo_top = size;
1292 if ((base + size) > ram_top)
1293 ram_top = base + size;
1294 }
1295 }
1296
1297 alloc_bottom = PAGE_ALIGN((unsigned long)&_end + 0x4000);
1298
1299 /*
1300 * If prom_memory_limit is set we reduce the upper limits *except* for
1301 * alloc_top_high. This must be the real top of RAM so we can put
1302 * TCE's up there.
1303 */
1304
1305 alloc_top_high = ram_top;
1306
1307 if (prom_memory_limit) {
1308 if (prom_memory_limit <= alloc_bottom) {
1309 prom_printf("Ignoring mem=%x <= alloc_bottom.\n",
1310 prom_memory_limit);
1311 prom_memory_limit = 0;
1312 } else if (prom_memory_limit >= ram_top) {
1313 prom_printf("Ignoring mem=%x >= ram_top.\n",
1314 prom_memory_limit);
1315 prom_memory_limit = 0;
1316 } else {
1317 ram_top = prom_memory_limit;
1318 rmo_top = min(rmo_top, prom_memory_limit);
1319 }
1320 }
1321
1322 /*
1323 * Setup our top alloc point, that is top of RMO or top of
1324 * segment 0 when running non-LPAR.
1325 * Some RS64 machines have buggy firmware where claims up at
1326 * 1GB fail. Cap at 768MB as a workaround.
1327 * Since 768MB is plenty of room, and we need to cap to something
1328 * reasonable on 32-bit, cap at 768MB on all machines.
1329 */
1330 if (!rmo_top)
1331 rmo_top = ram_top;
1332 rmo_top = min(0x30000000ul, rmo_top);
1333 alloc_top = rmo_top;
1334 alloc_top_high = ram_top;
1335
1336 /*
1337 * Check if we have an initrd after the kernel but still inside
1338 * the RMO. If we do move our bottom point to after it.
1339 */
1340 if (prom_initrd_start &&
1341 prom_initrd_start < rmo_top &&
1342 prom_initrd_end > alloc_bottom)
1343 alloc_bottom = PAGE_ALIGN(prom_initrd_end);
1344
1345 prom_printf("memory layout at init:\n");
1346 prom_printf(" memory_limit : %x (16 MB aligned)\n", prom_memory_limit);
1347 prom_printf(" alloc_bottom : %x\n", alloc_bottom);
1348 prom_printf(" alloc_top : %x\n", alloc_top);
1349 prom_printf(" alloc_top_hi : %x\n", alloc_top_high);
1350 prom_printf(" rmo_top : %x\n", rmo_top);
1351 prom_printf(" ram_top : %x\n", ram_top);
1352}
1353
1354static void __init prom_close_stdin(void)
1355{
1356 __be32 val;
1357 ihandle stdin;
1358
1359 if (prom_getprop(prom.chosen, "stdin", &val, sizeof(val)) > 0) {
1360 stdin = be32_to_cpu(val);
1361 call_prom("close", 1, 0, stdin);
1362 }
1363}
1364
1365#ifdef CONFIG_PPC_POWERNV
1366
1367#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
1368static u64 __initdata prom_opal_base;
1369static u64 __initdata prom_opal_entry;
1370#endif
1371
1372/*
1373 * Allocate room for and instantiate OPAL
1374 */
1375static void __init prom_instantiate_opal(void)
1376{
1377 phandle opal_node;
1378 ihandle opal_inst;
1379 u64 base, entry;
1380 u64 size = 0, align = 0x10000;
1381 __be64 val64;
1382 u32 rets[2];
1383
1384 prom_debug("prom_instantiate_opal: start...\n");
1385
1386 opal_node = call_prom("finddevice", 1, 1, ADDR("/ibm,opal"));
1387 prom_debug("opal_node: %x\n", opal_node);
1388 if (!PHANDLE_VALID(opal_node))
1389 return;
1390
1391 val64 = 0;
1392 prom_getprop(opal_node, "opal-runtime-size", &val64, sizeof(val64));
1393 size = be64_to_cpu(val64);
1394 if (size == 0)
1395 return;
1396 val64 = 0;
1397 prom_getprop(opal_node, "opal-runtime-alignment", &val64,sizeof(val64));
1398 align = be64_to_cpu(val64);
1399
1400 base = alloc_down(size, align, 0);
1401 if (base == 0) {
1402 prom_printf("OPAL allocation failed !\n");
1403 return;
1404 }
1405
1406 opal_inst = call_prom("open", 1, 1, ADDR("/ibm,opal"));
1407 if (!IHANDLE_VALID(opal_inst)) {
1408 prom_printf("opening opal package failed (%x)\n", opal_inst);
1409 return;
1410 }
1411
1412 prom_printf("instantiating opal at 0x%x...", base);
1413
1414 if (call_prom_ret("call-method", 4, 3, rets,
1415 ADDR("load-opal-runtime"),
1416 opal_inst,
1417 base >> 32, base & 0xffffffff) != 0
1418 || (rets[0] == 0 && rets[1] == 0)) {
1419 prom_printf(" failed\n");
1420 return;
1421 }
1422 entry = (((u64)rets[0]) << 32) | rets[1];
1423
1424 prom_printf(" done\n");
1425
1426 reserve_mem(base, size);
1427
1428 prom_debug("opal base = 0x%x\n", base);
1429 prom_debug("opal align = 0x%x\n", align);
1430 prom_debug("opal entry = 0x%x\n", entry);
1431 prom_debug("opal size = 0x%x\n", (long)size);
1432
1433 prom_setprop(opal_node, "/ibm,opal", "opal-base-address",
1434 &base, sizeof(base));
1435 prom_setprop(opal_node, "/ibm,opal", "opal-entry-address",
1436 &entry, sizeof(entry));
1437
1438#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
1439 prom_opal_base = base;
1440 prom_opal_entry = entry;
1441#endif
1442 prom_debug("prom_instantiate_opal: end...\n");
1443}
1444
1445#endif /* CONFIG_PPC_POWERNV */
1446
1447/*
1448 * Allocate room for and instantiate RTAS
1449 */
1450static void __init prom_instantiate_rtas(void)
1451{
1452 phandle rtas_node;
1453 ihandle rtas_inst;
1454 u32 base, entry = 0;
1455 __be32 val;
1456 u32 size = 0;
1457
1458 prom_debug("prom_instantiate_rtas: start...\n");
1459
1460 rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
1461 prom_debug("rtas_node: %x\n", rtas_node);
1462 if (!PHANDLE_VALID(rtas_node))
1463 return;
1464
1465 val = 0;
1466 prom_getprop(rtas_node, "rtas-size", &val, sizeof(size));
1467 size = be32_to_cpu(val);
1468 if (size == 0)
1469 return;
1470
1471 base = alloc_down(size, PAGE_SIZE, 0);
1472 if (base == 0)
1473 prom_panic("Could not allocate memory for RTAS\n");
1474
1475 rtas_inst = call_prom("open", 1, 1, ADDR("/rtas"));
1476 if (!IHANDLE_VALID(rtas_inst)) {
1477 prom_printf("opening rtas package failed (%x)\n", rtas_inst);
1478 return;
1479 }
1480
1481 prom_printf("instantiating rtas at 0x%x...", base);
1482
1483 if (call_prom_ret("call-method", 3, 2, &entry,
1484 ADDR("instantiate-rtas"),
1485 rtas_inst, base) != 0
1486 || entry == 0) {
1487 prom_printf(" failed\n");
1488 return;
1489 }
1490 prom_printf(" done\n");
1491
1492 reserve_mem(base, size);
1493
1494 val = cpu_to_be32(base);
1495 prom_setprop(rtas_node, "/rtas", "linux,rtas-base",
1496 &val, sizeof(val));
1497 val = cpu_to_be32(entry);
1498 prom_setprop(rtas_node, "/rtas", "linux,rtas-entry",
1499 &val, sizeof(val));
1500
1501 /* Check if it supports "query-cpu-stopped-state" */
1502 if (prom_getprop(rtas_node, "query-cpu-stopped-state",
1503 &val, sizeof(val)) != PROM_ERROR)
1504 rtas_has_query_cpu_stopped = true;
1505
1506 prom_debug("rtas base = 0x%x\n", base);
1507 prom_debug("rtas entry = 0x%x\n", entry);
1508 prom_debug("rtas size = 0x%x\n", (long)size);
1509
1510 prom_debug("prom_instantiate_rtas: end...\n");
1511}
1512
1513#ifdef CONFIG_PPC64
1514/*
1515 * Allocate room for and instantiate Stored Measurement Log (SML)
1516 */
1517static void __init prom_instantiate_sml(void)
1518{
1519 phandle ibmvtpm_node;
1520 ihandle ibmvtpm_inst;
1521 u32 entry = 0, size = 0, succ = 0;
1522 u64 base;
1523 __be32 val;
1524
1525 prom_debug("prom_instantiate_sml: start...\n");
1526
1527 ibmvtpm_node = call_prom("finddevice", 1, 1, ADDR("/vdevice/vtpm"));
1528 prom_debug("ibmvtpm_node: %x\n", ibmvtpm_node);
1529 if (!PHANDLE_VALID(ibmvtpm_node))
1530 return;
1531
1532 ibmvtpm_inst = call_prom("open", 1, 1, ADDR("/vdevice/vtpm"));
1533 if (!IHANDLE_VALID(ibmvtpm_inst)) {
1534 prom_printf("opening vtpm package failed (%x)\n", ibmvtpm_inst);
1535 return;
1536 }
1537
1538 if (prom_getprop(ibmvtpm_node, "ibm,sml-efi-reformat-supported",
1539 &val, sizeof(val)) != PROM_ERROR) {
1540 if (call_prom_ret("call-method", 2, 2, &succ,
1541 ADDR("reformat-sml-to-efi-alignment"),
1542 ibmvtpm_inst) != 0 || succ == 0) {
1543 prom_printf("Reformat SML to EFI alignment failed\n");
1544 return;
1545 }
1546
1547 if (call_prom_ret("call-method", 2, 2, &size,
1548 ADDR("sml-get-allocated-size"),
1549 ibmvtpm_inst) != 0 || size == 0) {
1550 prom_printf("SML get allocated size failed\n");
1551 return;
1552 }
1553 } else {
1554 if (call_prom_ret("call-method", 2, 2, &size,
1555 ADDR("sml-get-handover-size"),
1556 ibmvtpm_inst) != 0 || size == 0) {
1557 prom_printf("SML get handover size failed\n");
1558 return;
1559 }
1560 }
1561
1562 base = alloc_down(size, PAGE_SIZE, 0);
1563 if (base == 0)
1564 prom_panic("Could not allocate memory for sml\n");
1565
1566 prom_printf("instantiating sml at 0x%x...", base);
1567
1568 memset((void *)base, 0, size);
1569
1570 if (call_prom_ret("call-method", 4, 2, &entry,
1571 ADDR("sml-handover"),
1572 ibmvtpm_inst, size, base) != 0 || entry == 0) {
1573 prom_printf("SML handover failed\n");
1574 return;
1575 }
1576 prom_printf(" done\n");
1577
1578 reserve_mem(base, size);
1579
1580 prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-base",
1581 &base, sizeof(base));
1582 prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-size",
1583 &size, sizeof(size));
1584
1585 prom_debug("sml base = 0x%x\n", base);
1586 prom_debug("sml size = 0x%x\n", (long)size);
1587
1588 prom_debug("prom_instantiate_sml: end...\n");
1589}
1590
1591/*
1592 * Allocate room for and initialize TCE tables
1593 */
1594#ifdef __BIG_ENDIAN__
1595static void __init prom_initialize_tce_table(void)
1596{
1597 phandle node;
1598 ihandle phb_node;
1599 char compatible[64], type[64], model[64];
1600 char *path = prom_scratch;
1601 u64 base, align;
1602 u32 minalign, minsize;
1603 u64 tce_entry, *tce_entryp;
1604 u64 local_alloc_top, local_alloc_bottom;
1605 u64 i;
1606
1607 if (prom_iommu_off)
1608 return;
1609
1610 prom_debug("starting prom_initialize_tce_table\n");
1611
1612 /* Cache current top of allocs so we reserve a single block */
1613 local_alloc_top = alloc_top_high;
1614 local_alloc_bottom = local_alloc_top;
1615
1616 /* Search all nodes looking for PHBs. */
1617 for (node = 0; prom_next_node(&node); ) {
1618 compatible[0] = 0;
1619 type[0] = 0;
1620 model[0] = 0;
1621 prom_getprop(node, "compatible",
1622 compatible, sizeof(compatible));
1623 prom_getprop(node, "device_type", type, sizeof(type));
1624 prom_getprop(node, "model", model, sizeof(model));
1625
1626 if ((type[0] == 0) || (strstr(type, "pci") == NULL))
1627 continue;
1628
1629 /* Keep the old logic intact to avoid regression. */
1630 if (compatible[0] != 0) {
1631 if ((strstr(compatible, "python") == NULL) &&
1632 (strstr(compatible, "Speedwagon") == NULL) &&
1633 (strstr(compatible, "Winnipeg") == NULL))
1634 continue;
1635 } else if (model[0] != 0) {
1636 if ((strstr(model, "ython") == NULL) &&
1637 (strstr(model, "peedwagon") == NULL) &&
1638 (strstr(model, "innipeg") == NULL))
1639 continue;
1640 }
1641
1642 if (prom_getprop(node, "tce-table-minalign", &minalign,
1643 sizeof(minalign)) == PROM_ERROR)
1644 minalign = 0;
1645 if (prom_getprop(node, "tce-table-minsize", &minsize,
1646 sizeof(minsize)) == PROM_ERROR)
1647 minsize = 4UL << 20;
1648
1649 /*
1650 * Even though we read what OF wants, we just set the table
1651 * size to 4 MB. This is enough to map 2GB of PCI DMA space.
1652 * By doing this, we avoid the pitfalls of trying to DMA to
1653 * MMIO space and the DMA alias hole.
1654 *
1655 * On POWER4, firmware sets the TCE region by assuming
1656 * each TCE table is 8MB. Using this memory for anything
1657 * else will impact performance, so we always allocate 8MB.
1658 * Anton
1659 */
1660 if (pvr_version_is(PVR_POWER4) || pvr_version_is(PVR_POWER4p))
1661 minsize = 8UL << 20;
1662 else
1663 minsize = 4UL << 20;
1664
1665 /* Align to the greater of the align or size */
1666 align = max(minalign, minsize);
1667 base = alloc_down(minsize, align, 1);
1668 if (base == 0)
1669 prom_panic("ERROR, cannot find space for TCE table.\n");
1670 if (base < local_alloc_bottom)
1671 local_alloc_bottom = base;
1672
1673 /* It seems OF doesn't null-terminate the path :-( */
1674 memset(path, 0, PROM_SCRATCH_SIZE);
1675 /* Call OF to setup the TCE hardware */
1676 if (call_prom("package-to-path", 3, 1, node,
1677 path, PROM_SCRATCH_SIZE-1) == PROM_ERROR) {
1678 prom_printf("package-to-path failed\n");
1679 }
1680
1681 /* Save away the TCE table attributes for later use. */
1682 prom_setprop(node, path, "linux,tce-base", &base, sizeof(base));
1683 prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize));
1684
1685 prom_debug("TCE table: %s\n", path);
1686 prom_debug("\tnode = 0x%x\n", node);
1687 prom_debug("\tbase = 0x%x\n", base);
1688 prom_debug("\tsize = 0x%x\n", minsize);
1689
1690 /* Initialize the table to have a one-to-one mapping
1691 * over the allocated size.
1692 */
1693 tce_entryp = (u64 *)base;
1694 for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) {
1695 tce_entry = (i << PAGE_SHIFT);
1696 tce_entry |= 0x3;
1697 *tce_entryp = tce_entry;
1698 }
1699
1700 prom_printf("opening PHB %s", path);
1701 phb_node = call_prom("open", 1, 1, path);
1702 if (phb_node == 0)
1703 prom_printf("... failed\n");
1704 else
1705 prom_printf("... done\n");
1706
1707 call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"),
1708 phb_node, -1, minsize,
1709 (u32) base, (u32) (base >> 32));
1710 call_prom("close", 1, 0, phb_node);
1711 }
1712
1713 reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom);
1714
1715 /* These are only really needed if there is a memory limit in
1716 * effect, but we don't know so export them always. */
1717 prom_tce_alloc_start = local_alloc_bottom;
1718 prom_tce_alloc_end = local_alloc_top;
1719
1720 /* Flag the first invalid entry */
1721 prom_debug("ending prom_initialize_tce_table\n");
1722}
1723#endif /* __BIG_ENDIAN__ */
1724#endif /* CONFIG_PPC64 */
1725
1726/*
1727 * With CHRP SMP we need to use the OF to start the other processors.
1728 * We can't wait until smp_boot_cpus (the OF is trashed by then)
1729 * so we have to put the processors into a holding pattern controlled
1730 * by the kernel (not OF) before we destroy the OF.
1731 *
1732 * This uses a chunk of low memory, puts some holding pattern
1733 * code there and sends the other processors off to there until
1734 * smp_boot_cpus tells them to do something. The holding pattern
1735 * checks that address until its cpu # is there, when it is that
1736 * cpu jumps to __secondary_start(). smp_boot_cpus() takes care
1737 * of setting those values.
1738 *
1739 * We also use physical address 0x4 here to tell when a cpu
1740 * is in its holding pattern code.
1741 *
1742 * -- Cort
1743 */
1744/*
1745 * We want to reference the copy of __secondary_hold_* in the
1746 * 0 - 0x100 address range
1747 */
1748#define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff)
1749
1750static void __init prom_hold_cpus(void)
1751{
1752 unsigned long i;
1753 phandle node;
1754 char type[64];
1755 unsigned long *spinloop
1756 = (void *) LOW_ADDR(__secondary_hold_spinloop);
1757 unsigned long *acknowledge
1758 = (void *) LOW_ADDR(__secondary_hold_acknowledge);
1759 unsigned long secondary_hold = LOW_ADDR(__secondary_hold);
1760
1761 /*
1762 * On pseries, if RTAS supports "query-cpu-stopped-state",
1763 * we skip this stage, the CPUs will be started by the
1764 * kernel using RTAS.
1765 */
1766 if ((of_platform == PLATFORM_PSERIES ||
1767 of_platform == PLATFORM_PSERIES_LPAR) &&
1768 rtas_has_query_cpu_stopped) {
1769 prom_printf("prom_hold_cpus: skipped\n");
1770 return;
1771 }
1772
1773 prom_debug("prom_hold_cpus: start...\n");
1774 prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop);
1775 prom_debug(" 1) *spinloop = 0x%x\n", *spinloop);
1776 prom_debug(" 1) acknowledge = 0x%x\n",
1777 (unsigned long)acknowledge);
1778 prom_debug(" 1) *acknowledge = 0x%x\n", *acknowledge);
1779 prom_debug(" 1) secondary_hold = 0x%x\n", secondary_hold);
1780
1781 /* Set the common spinloop variable, so all of the secondary cpus
1782 * will block when they are awakened from their OF spinloop.
1783 * This must occur for both SMP and non SMP kernels, since OF will
1784 * be trashed when we move the kernel.
1785 */
1786 *spinloop = 0;
1787
1788 /* look for cpus */
1789 for (node = 0; prom_next_node(&node); ) {
1790 unsigned int cpu_no;
1791 __be32 reg;
1792
1793 type[0] = 0;
1794 prom_getprop(node, "device_type", type, sizeof(type));
1795 if (strcmp(type, "cpu") != 0)
1796 continue;
1797
1798 /* Skip non-configured cpus. */
1799 if (prom_getprop(node, "status", type, sizeof(type)) > 0)
1800 if (strcmp(type, "okay") != 0)
1801 continue;
1802
1803 reg = cpu_to_be32(-1); /* make sparse happy */
1804 prom_getprop(node, "reg", ®, sizeof(reg));
1805 cpu_no = be32_to_cpu(reg);
1806
1807 prom_debug("cpu hw idx = %lu\n", cpu_no);
1808
1809 /* Init the acknowledge var which will be reset by
1810 * the secondary cpu when it awakens from its OF
1811 * spinloop.
1812 */
1813 *acknowledge = (unsigned long)-1;
1814
1815 if (cpu_no != prom.cpu) {
1816 /* Primary Thread of non-boot cpu or any thread */
1817 prom_printf("starting cpu hw idx %lu... ", cpu_no);
1818 call_prom("start-cpu", 3, 0, node,
1819 secondary_hold, cpu_no);
1820
1821 for (i = 0; (i < 100000000) &&
1822 (*acknowledge == ((unsigned long)-1)); i++ )
1823 mb();
1824
1825 if (*acknowledge == cpu_no)
1826 prom_printf("done\n");
1827 else
1828 prom_printf("failed: %x\n", *acknowledge);
1829 }
1830#ifdef CONFIG_SMP
1831 else
1832 prom_printf("boot cpu hw idx %lu\n", cpu_no);
1833#endif /* CONFIG_SMP */
1834 }
1835
1836 prom_debug("prom_hold_cpus: end...\n");
1837}
1838
1839
1840static void __init prom_init_client_services(unsigned long pp)
1841{
1842 /* Get a handle to the prom entry point before anything else */
1843 prom_entry = pp;
1844
1845 /* get a handle for the stdout device */
1846 prom.chosen = call_prom("finddevice", 1, 1, ADDR("/chosen"));
1847 if (!PHANDLE_VALID(prom.chosen))
1848 prom_panic("cannot find chosen"); /* msg won't be printed :( */
1849
1850 /* get device tree root */
1851 prom.root = call_prom("finddevice", 1, 1, ADDR("/"));
1852 if (!PHANDLE_VALID(prom.root))
1853 prom_panic("cannot find device tree root"); /* msg won't be printed :( */
1854
1855 prom.mmumap = 0;
1856}
1857
1858#ifdef CONFIG_PPC32
1859/*
1860 * For really old powermacs, we need to map things we claim.
1861 * For that, we need the ihandle of the mmu.
1862 * Also, on the longtrail, we need to work around other bugs.
1863 */
1864static void __init prom_find_mmu(void)
1865{
1866 phandle oprom;
1867 char version[64];
1868
1869 oprom = call_prom("finddevice", 1, 1, ADDR("/openprom"));
1870 if (!PHANDLE_VALID(oprom))
1871 return;
1872 if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0)
1873 return;
1874 version[sizeof(version) - 1] = 0;
1875 /* XXX might need to add other versions here */
1876 if (strcmp(version, "Open Firmware, 1.0.5") == 0)
1877 of_workarounds = OF_WA_CLAIM;
1878 else if (strncmp(version, "FirmWorks,3.", 12) == 0) {
1879 of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL;
1880 call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim");
1881 } else
1882 return;
1883 prom.memory = call_prom("open", 1, 1, ADDR("/memory"));
1884 prom_getprop(prom.chosen, "mmu", &prom.mmumap,
1885 sizeof(prom.mmumap));
1886 prom.mmumap = be32_to_cpu(prom.mmumap);
1887 if (!IHANDLE_VALID(prom.memory) || !IHANDLE_VALID(prom.mmumap))
1888 of_workarounds &= ~OF_WA_CLAIM; /* hmmm */
1889}
1890#else
1891#define prom_find_mmu()
1892#endif
1893
1894static void __init prom_init_stdout(void)
1895{
1896 char *path = of_stdout_device;
1897 char type[16];
1898 phandle stdout_node;
1899 __be32 val;
1900
1901 if (prom_getprop(prom.chosen, "stdout", &val, sizeof(val)) <= 0)
1902 prom_panic("cannot find stdout");
1903
1904 prom.stdout = be32_to_cpu(val);
1905
1906 /* Get the full OF pathname of the stdout device */
1907 memset(path, 0, 256);
1908 call_prom("instance-to-path", 3, 1, prom.stdout, path, 255);
1909 prom_printf("OF stdout device is: %s\n", of_stdout_device);
1910 prom_setprop(prom.chosen, "/chosen", "linux,stdout-path",
1911 path, strlen(path) + 1);
1912
1913 /* instance-to-package fails on PA-Semi */
1914 stdout_node = call_prom("instance-to-package", 1, 1, prom.stdout);
1915 if (stdout_node != PROM_ERROR) {
1916 val = cpu_to_be32(stdout_node);
1917 prom_setprop(prom.chosen, "/chosen", "linux,stdout-package",
1918 &val, sizeof(val));
1919
1920 /* If it's a display, note it */
1921 memset(type, 0, sizeof(type));
1922 prom_getprop(stdout_node, "device_type", type, sizeof(type));
1923 if (strcmp(type, "display") == 0)
1924 prom_setprop(stdout_node, path, "linux,boot-display", NULL, 0);
1925 }
1926}
1927
1928static int __init prom_find_machine_type(void)
1929{
1930 char compat[256];
1931 int len, i = 0;
1932#ifdef CONFIG_PPC64
1933 phandle rtas;
1934 int x;
1935#endif
1936
1937 /* Look for a PowerMac or a Cell */
1938 len = prom_getprop(prom.root, "compatible",
1939 compat, sizeof(compat)-1);
1940 if (len > 0) {
1941 compat[len] = 0;
1942 while (i < len) {
1943 char *p = &compat[i];
1944 int sl = strlen(p);
1945 if (sl == 0)
1946 break;
1947 if (strstr(p, "Power Macintosh") ||
1948 strstr(p, "MacRISC"))
1949 return PLATFORM_POWERMAC;
1950#ifdef CONFIG_PPC64
1951 /* We must make sure we don't detect the IBM Cell
1952 * blades as pSeries due to some firmware issues,
1953 * so we do it here.
1954 */
1955 if (strstr(p, "IBM,CBEA") ||
1956 strstr(p, "IBM,CPBW-1.0"))
1957 return PLATFORM_GENERIC;
1958#endif /* CONFIG_PPC64 */
1959 i += sl + 1;
1960 }
1961 }
1962#ifdef CONFIG_PPC64
1963 /* Try to detect OPAL */
1964 if (PHANDLE_VALID(call_prom("finddevice", 1, 1, ADDR("/ibm,opal"))))
1965 return PLATFORM_OPAL;
1966
1967 /* Try to figure out if it's an IBM pSeries or any other
1968 * PAPR compliant platform. We assume it is if :
1969 * - /device_type is "chrp" (please, do NOT use that for future
1970 * non-IBM designs !
1971 * - it has /rtas
1972 */
1973 len = prom_getprop(prom.root, "device_type",
1974 compat, sizeof(compat)-1);
1975 if (len <= 0)
1976 return PLATFORM_GENERIC;
1977 if (strcmp(compat, "chrp"))
1978 return PLATFORM_GENERIC;
1979
1980 /* Default to pSeries. We need to know if we are running LPAR */
1981 rtas = call_prom("finddevice", 1, 1, ADDR("/rtas"));
1982 if (!PHANDLE_VALID(rtas))
1983 return PLATFORM_GENERIC;
1984 x = prom_getproplen(rtas, "ibm,hypertas-functions");
1985 if (x != PROM_ERROR) {
1986 prom_debug("Hypertas detected, assuming LPAR !\n");
1987 return PLATFORM_PSERIES_LPAR;
1988 }
1989 return PLATFORM_PSERIES;
1990#else
1991 return PLATFORM_GENERIC;
1992#endif
1993}
1994
1995static int __init prom_set_color(ihandle ih, int i, int r, int g, int b)
1996{
1997 return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r);
1998}
1999
2000/*
2001 * If we have a display that we don't know how to drive,
2002 * we will want to try to execute OF's open method for it
2003 * later. However, OF will probably fall over if we do that
2004 * we've taken over the MMU.
2005 * So we check whether we will need to open the display,
2006 * and if so, open it now.
2007 */
2008static void __init prom_check_displays(void)
2009{
2010 char type[16], *path;
2011 phandle node;
2012 ihandle ih;
2013 int i;
2014
2015 static unsigned char default_colors[] = {
2016 0x00, 0x00, 0x00,
2017 0x00, 0x00, 0xaa,
2018 0x00, 0xaa, 0x00,
2019 0x00, 0xaa, 0xaa,
2020 0xaa, 0x00, 0x00,
2021 0xaa, 0x00, 0xaa,
2022 0xaa, 0xaa, 0x00,
2023 0xaa, 0xaa, 0xaa,
2024 0x55, 0x55, 0x55,
2025 0x55, 0x55, 0xff,
2026 0x55, 0xff, 0x55,
2027 0x55, 0xff, 0xff,
2028 0xff, 0x55, 0x55,
2029 0xff, 0x55, 0xff,
2030 0xff, 0xff, 0x55,
2031 0xff, 0xff, 0xff
2032 };
2033 const unsigned char *clut;
2034
2035 prom_debug("Looking for displays\n");
2036 for (node = 0; prom_next_node(&node); ) {
2037 memset(type, 0, sizeof(type));
2038 prom_getprop(node, "device_type", type, sizeof(type));
2039 if (strcmp(type, "display") != 0)
2040 continue;
2041
2042 /* It seems OF doesn't null-terminate the path :-( */
2043 path = prom_scratch;
2044 memset(path, 0, PROM_SCRATCH_SIZE);
2045
2046 /*
2047 * leave some room at the end of the path for appending extra
2048 * arguments
2049 */
2050 if (call_prom("package-to-path", 3, 1, node, path,
2051 PROM_SCRATCH_SIZE-10) == PROM_ERROR)
2052 continue;
2053 prom_printf("found display : %s, opening... ", path);
2054
2055 ih = call_prom("open", 1, 1, path);
2056 if (ih == 0) {
2057 prom_printf("failed\n");
2058 continue;
2059 }
2060
2061 /* Success */
2062 prom_printf("done\n");
2063 prom_setprop(node, path, "linux,opened", NULL, 0);
2064
2065 /* Setup a usable color table when the appropriate
2066 * method is available. Should update this to set-colors */
2067 clut = default_colors;
2068 for (i = 0; i < 16; i++, clut += 3)
2069 if (prom_set_color(ih, i, clut[0], clut[1],
2070 clut[2]) != 0)
2071 break;
2072
2073#ifdef CONFIG_LOGO_LINUX_CLUT224
2074 clut = PTRRELOC(logo_linux_clut224.clut);
2075 for (i = 0; i < logo_linux_clut224.clutsize; i++, clut += 3)
2076 if (prom_set_color(ih, i + 32, clut[0], clut[1],
2077 clut[2]) != 0)
2078 break;
2079#endif /* CONFIG_LOGO_LINUX_CLUT224 */
2080
2081#ifdef CONFIG_PPC_EARLY_DEBUG_BOOTX
2082 if (prom_getprop(node, "linux,boot-display", NULL, 0) !=
2083 PROM_ERROR) {
2084 u32 width, height, pitch, addr;
2085
2086 prom_printf("Setting btext !\n");
2087 prom_getprop(node, "width", &width, 4);
2088 prom_getprop(node, "height", &height, 4);
2089 prom_getprop(node, "linebytes", &pitch, 4);
2090 prom_getprop(node, "address", &addr, 4);
2091 prom_printf("W=%d H=%d LB=%d addr=0x%x\n",
2092 width, height, pitch, addr);
2093 btext_setup_display(width, height, 8, pitch, addr);
2094 }
2095#endif /* CONFIG_PPC_EARLY_DEBUG_BOOTX */
2096 }
2097}
2098
2099
2100/* Return (relocated) pointer to this much memory: moves initrd if reqd. */
2101static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end,
2102 unsigned long needed, unsigned long align)
2103{
2104 void *ret;
2105
2106 *mem_start = _ALIGN(*mem_start, align);
2107 while ((*mem_start + needed) > *mem_end) {
2108 unsigned long room, chunk;
2109
2110 prom_debug("Chunk exhausted, claiming more at %x...\n",
2111 alloc_bottom);
2112 room = alloc_top - alloc_bottom;
2113 if (room > DEVTREE_CHUNK_SIZE)
2114 room = DEVTREE_CHUNK_SIZE;
2115 if (room < PAGE_SIZE)
2116 prom_panic("No memory for flatten_device_tree "
2117 "(no room)\n");
2118 chunk = alloc_up(room, 0);
2119 if (chunk == 0)
2120 prom_panic("No memory for flatten_device_tree "
2121 "(claim failed)\n");
2122 *mem_end = chunk + room;
2123 }
2124
2125 ret = (void *)*mem_start;
2126 *mem_start += needed;
2127
2128 return ret;
2129}
2130
2131#define dt_push_token(token, mem_start, mem_end) do { \
2132 void *room = make_room(mem_start, mem_end, 4, 4); \
2133 *(__be32 *)room = cpu_to_be32(token); \
2134 } while(0)
2135
2136static unsigned long __init dt_find_string(char *str)
2137{
2138 char *s, *os;
2139
2140 s = os = (char *)dt_string_start;
2141 s += 4;
2142 while (s < (char *)dt_string_end) {
2143 if (strcmp(s, str) == 0)
2144 return s - os;
2145 s += strlen(s) + 1;
2146 }
2147 return 0;
2148}
2149
2150/*
2151 * The Open Firmware 1275 specification states properties must be 31 bytes or
2152 * less, however not all firmwares obey this. Make it 64 bytes to be safe.
2153 */
2154#define MAX_PROPERTY_NAME 64
2155
2156static void __init scan_dt_build_strings(phandle node,
2157 unsigned long *mem_start,
2158 unsigned long *mem_end)
2159{
2160 char *prev_name, *namep, *sstart;
2161 unsigned long soff;
2162 phandle child;
2163
2164 sstart = (char *)dt_string_start;
2165
2166 /* get and store all property names */
2167 prev_name = "";
2168 for (;;) {
2169 /* 64 is max len of name including nul. */
2170 namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1);
2171 if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) {
2172 /* No more nodes: unwind alloc */
2173 *mem_start = (unsigned long)namep;
2174 break;
2175 }
2176
2177 /* skip "name" */
2178 if (strcmp(namep, "name") == 0) {
2179 *mem_start = (unsigned long)namep;
2180 prev_name = "name";
2181 continue;
2182 }
2183 /* get/create string entry */
2184 soff = dt_find_string(namep);
2185 if (soff != 0) {
2186 *mem_start = (unsigned long)namep;
2187 namep = sstart + soff;
2188 } else {
2189 /* Trim off some if we can */
2190 *mem_start = (unsigned long)namep + strlen(namep) + 1;
2191 dt_string_end = *mem_start;
2192 }
2193 prev_name = namep;
2194 }
2195
2196 /* do all our children */
2197 child = call_prom("child", 1, 1, node);
2198 while (child != 0) {
2199 scan_dt_build_strings(child, mem_start, mem_end);
2200 child = call_prom("peer", 1, 1, child);
2201 }
2202}
2203
2204static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
2205 unsigned long *mem_end)
2206{
2207 phandle child;
2208 char *namep, *prev_name, *sstart, *p, *ep, *lp, *path;
2209 unsigned long soff;
2210 unsigned char *valp;
2211 static char pname[MAX_PROPERTY_NAME];
2212 int l, room, has_phandle = 0;
2213
2214 dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end);
2215
2216 /* get the node's full name */
2217 namep = (char *)*mem_start;
2218 room = *mem_end - *mem_start;
2219 if (room > 255)
2220 room = 255;
2221 l = call_prom("package-to-path", 3, 1, node, namep, room);
2222 if (l >= 0) {
2223 /* Didn't fit? Get more room. */
2224 if (l >= room) {
2225 if (l >= *mem_end - *mem_start)
2226 namep = make_room(mem_start, mem_end, l+1, 1);
2227 call_prom("package-to-path", 3, 1, node, namep, l);
2228 }
2229 namep[l] = '\0';
2230
2231 /* Fixup an Apple bug where they have bogus \0 chars in the
2232 * middle of the path in some properties, and extract
2233 * the unit name (everything after the last '/').
2234 */
2235 for (lp = p = namep, ep = namep + l; p < ep; p++) {
2236 if (*p == '/')
2237 lp = namep;
2238 else if (*p != 0)
2239 *lp++ = *p;
2240 }
2241 *lp = 0;
2242 *mem_start = _ALIGN((unsigned long)lp + 1, 4);
2243 }
2244
2245 /* get it again for debugging */
2246 path = prom_scratch;
2247 memset(path, 0, PROM_SCRATCH_SIZE);
2248 call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1);
2249
2250 /* get and store all properties */
2251 prev_name = "";
2252 sstart = (char *)dt_string_start;
2253 for (;;) {
2254 if (call_prom("nextprop", 3, 1, node, prev_name,
2255 pname) != 1)
2256 break;
2257
2258 /* skip "name" */
2259 if (strcmp(pname, "name") == 0) {
2260 prev_name = "name";
2261 continue;
2262 }
2263
2264 /* find string offset */
2265 soff = dt_find_string(pname);
2266 if (soff == 0) {
2267 prom_printf("WARNING: Can't find string index for"
2268 " <%s>, node %s\n", pname, path);
2269 break;
2270 }
2271 prev_name = sstart + soff;
2272
2273 /* get length */
2274 l = call_prom("getproplen", 2, 1, node, pname);
2275
2276 /* sanity checks */
2277 if (l == PROM_ERROR)
2278 continue;
2279
2280 /* push property head */
2281 dt_push_token(OF_DT_PROP, mem_start, mem_end);
2282 dt_push_token(l, mem_start, mem_end);
2283 dt_push_token(soff, mem_start, mem_end);
2284
2285 /* push property content */
2286 valp = make_room(mem_start, mem_end, l, 4);
2287 call_prom("getprop", 4, 1, node, pname, valp, l);
2288 *mem_start = _ALIGN(*mem_start, 4);
2289
2290 if (!strcmp(pname, "phandle"))
2291 has_phandle = 1;
2292 }
2293
2294 /* Add a "linux,phandle" property if no "phandle" property already
2295 * existed (can happen with OPAL)
2296 */
2297 if (!has_phandle) {
2298 soff = dt_find_string("linux,phandle");
2299 if (soff == 0)
2300 prom_printf("WARNING: Can't find string index for"
2301 " <linux-phandle> node %s\n", path);
2302 else {
2303 dt_push_token(OF_DT_PROP, mem_start, mem_end);
2304 dt_push_token(4, mem_start, mem_end);
2305 dt_push_token(soff, mem_start, mem_end);
2306 valp = make_room(mem_start, mem_end, 4, 4);
2307 *(__be32 *)valp = cpu_to_be32(node);
2308 }
2309 }
2310
2311 /* do all our children */
2312 child = call_prom("child", 1, 1, node);
2313 while (child != 0) {
2314 scan_dt_build_struct(child, mem_start, mem_end);
2315 child = call_prom("peer", 1, 1, child);
2316 }
2317
2318 dt_push_token(OF_DT_END_NODE, mem_start, mem_end);
2319}
2320
2321static void __init flatten_device_tree(void)
2322{
2323 phandle root;
2324 unsigned long mem_start, mem_end, room;
2325 struct boot_param_header *hdr;
2326 char *namep;
2327 u64 *rsvmap;
2328
2329 /*
2330 * Check how much room we have between alloc top & bottom (+/- a
2331 * few pages), crop to 1MB, as this is our "chunk" size
2332 */
2333 room = alloc_top - alloc_bottom - 0x4000;
2334 if (room > DEVTREE_CHUNK_SIZE)
2335 room = DEVTREE_CHUNK_SIZE;
2336 prom_debug("starting device tree allocs at %x\n", alloc_bottom);
2337
2338 /* Now try to claim that */
2339 mem_start = (unsigned long)alloc_up(room, PAGE_SIZE);
2340 if (mem_start == 0)
2341 prom_panic("Can't allocate initial device-tree chunk\n");
2342 mem_end = mem_start + room;
2343
2344 /* Get root of tree */
2345 root = call_prom("peer", 1, 1, (phandle)0);
2346 if (root == (phandle)0)
2347 prom_panic ("couldn't get device tree root\n");
2348
2349 /* Build header and make room for mem rsv map */
2350 mem_start = _ALIGN(mem_start, 4);
2351 hdr = make_room(&mem_start, &mem_end,
2352 sizeof(struct boot_param_header), 4);
2353 dt_header_start = (unsigned long)hdr;
2354 rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8);
2355
2356 /* Start of strings */
2357 mem_start = PAGE_ALIGN(mem_start);
2358 dt_string_start = mem_start;
2359 mem_start += 4; /* hole */
2360
2361 /* Add "linux,phandle" in there, we'll need it */
2362 namep = make_room(&mem_start, &mem_end, 16, 1);
2363 strcpy(namep, "linux,phandle");
2364 mem_start = (unsigned long)namep + strlen(namep) + 1;
2365
2366 /* Build string array */
2367 prom_printf("Building dt strings...\n");
2368 scan_dt_build_strings(root, &mem_start, &mem_end);
2369 dt_string_end = mem_start;
2370
2371 /* Build structure */
2372 mem_start = PAGE_ALIGN(mem_start);
2373 dt_struct_start = mem_start;
2374 prom_printf("Building dt structure...\n");
2375 scan_dt_build_struct(root, &mem_start, &mem_end);
2376 dt_push_token(OF_DT_END, &mem_start, &mem_end);
2377 dt_struct_end = PAGE_ALIGN(mem_start);
2378
2379 /* Finish header */
2380 hdr->boot_cpuid_phys = cpu_to_be32(prom.cpu);
2381 hdr->magic = cpu_to_be32(OF_DT_HEADER);
2382 hdr->totalsize = cpu_to_be32(dt_struct_end - dt_header_start);
2383 hdr->off_dt_struct = cpu_to_be32(dt_struct_start - dt_header_start);
2384 hdr->off_dt_strings = cpu_to_be32(dt_string_start - dt_header_start);
2385 hdr->dt_strings_size = cpu_to_be32(dt_string_end - dt_string_start);
2386 hdr->off_mem_rsvmap = cpu_to_be32(((unsigned long)rsvmap) - dt_header_start);
2387 hdr->version = cpu_to_be32(OF_DT_VERSION);
2388 /* Version 16 is not backward compatible */
2389 hdr->last_comp_version = cpu_to_be32(0x10);
2390
2391 /* Copy the reserve map in */
2392 memcpy(rsvmap, mem_reserve_map, sizeof(mem_reserve_map));
2393
2394#ifdef DEBUG_PROM
2395 {
2396 int i;
2397 prom_printf("reserved memory map:\n");
2398 for (i = 0; i < mem_reserve_cnt; i++)
2399 prom_printf(" %x - %x\n",
2400 be64_to_cpu(mem_reserve_map[i].base),
2401 be64_to_cpu(mem_reserve_map[i].size));
2402 }
2403#endif
2404 /* Bump mem_reserve_cnt to cause further reservations to fail
2405 * since it's too late.
2406 */
2407 mem_reserve_cnt = MEM_RESERVE_MAP_SIZE;
2408
2409 prom_printf("Device tree strings 0x%x -> 0x%x\n",
2410 dt_string_start, dt_string_end);
2411 prom_printf("Device tree struct 0x%x -> 0x%x\n",
2412 dt_struct_start, dt_struct_end);
2413}
2414
2415#ifdef CONFIG_PPC_MAPLE
2416/* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property.
2417 * The values are bad, and it doesn't even have the right number of cells. */
2418static void __init fixup_device_tree_maple(void)
2419{
2420 phandle isa;
2421 u32 rloc = 0x01002000; /* IO space; PCI device = 4 */
2422 u32 isa_ranges[6];
2423 char *name;
2424
2425 name = "/ht@0/isa@4";
2426 isa = call_prom("finddevice", 1, 1, ADDR(name));
2427 if (!PHANDLE_VALID(isa)) {
2428 name = "/ht@0/isa@6";
2429 isa = call_prom("finddevice", 1, 1, ADDR(name));
2430 rloc = 0x01003000; /* IO space; PCI device = 6 */
2431 }
2432 if (!PHANDLE_VALID(isa))
2433 return;
2434
2435 if (prom_getproplen(isa, "ranges") != 12)
2436 return;
2437 if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges))
2438 == PROM_ERROR)
2439 return;
2440
2441 if (isa_ranges[0] != 0x1 ||
2442 isa_ranges[1] != 0xf4000000 ||
2443 isa_ranges[2] != 0x00010000)
2444 return;
2445
2446 prom_printf("Fixing up bogus ISA range on Maple/Apache...\n");
2447
2448 isa_ranges[0] = 0x1;
2449 isa_ranges[1] = 0x0;
2450 isa_ranges[2] = rloc;
2451 isa_ranges[3] = 0x0;
2452 isa_ranges[4] = 0x0;
2453 isa_ranges[5] = 0x00010000;
2454 prom_setprop(isa, name, "ranges",
2455 isa_ranges, sizeof(isa_ranges));
2456}
2457
2458#define CPC925_MC_START 0xf8000000
2459#define CPC925_MC_LENGTH 0x1000000
2460/* The values for memory-controller don't have right number of cells */
2461static void __init fixup_device_tree_maple_memory_controller(void)
2462{
2463 phandle mc;
2464 u32 mc_reg[4];
2465 char *name = "/hostbridge@f8000000";
2466 u32 ac, sc;
2467
2468 mc = call_prom("finddevice", 1, 1, ADDR(name));
2469 if (!PHANDLE_VALID(mc))
2470 return;
2471
2472 if (prom_getproplen(mc, "reg") != 8)
2473 return;
2474
2475 prom_getprop(prom.root, "#address-cells", &ac, sizeof(ac));
2476 prom_getprop(prom.root, "#size-cells", &sc, sizeof(sc));
2477 if ((ac != 2) || (sc != 2))
2478 return;
2479
2480 if (prom_getprop(mc, "reg", mc_reg, sizeof(mc_reg)) == PROM_ERROR)
2481 return;
2482
2483 if (mc_reg[0] != CPC925_MC_START || mc_reg[1] != CPC925_MC_LENGTH)
2484 return;
2485
2486 prom_printf("Fixing up bogus hostbridge on Maple...\n");
2487
2488 mc_reg[0] = 0x0;
2489 mc_reg[1] = CPC925_MC_START;
2490 mc_reg[2] = 0x0;
2491 mc_reg[3] = CPC925_MC_LENGTH;
2492 prom_setprop(mc, name, "reg", mc_reg, sizeof(mc_reg));
2493}
2494#else
2495#define fixup_device_tree_maple()
2496#define fixup_device_tree_maple_memory_controller()
2497#endif
2498
2499#ifdef CONFIG_PPC_CHRP
2500/*
2501 * Pegasos and BriQ lacks the "ranges" property in the isa node
2502 * Pegasos needs decimal IRQ 14/15, not hexadecimal
2503 * Pegasos has the IDE configured in legacy mode, but advertised as native
2504 */
2505static void __init fixup_device_tree_chrp(void)
2506{
2507 phandle ph;
2508 u32 prop[6];
2509 u32 rloc = 0x01006000; /* IO space; PCI device = 12 */
2510 char *name;
2511 int rc;
2512
2513 name = "/pci@80000000/isa@c";
2514 ph = call_prom("finddevice", 1, 1, ADDR(name));
2515 if (!PHANDLE_VALID(ph)) {
2516 name = "/pci@ff500000/isa@6";
2517 ph = call_prom("finddevice", 1, 1, ADDR(name));
2518 rloc = 0x01003000; /* IO space; PCI device = 6 */
2519 }
2520 if (PHANDLE_VALID(ph)) {
2521 rc = prom_getproplen(ph, "ranges");
2522 if (rc == 0 || rc == PROM_ERROR) {
2523 prom_printf("Fixing up missing ISA range on Pegasos...\n");
2524
2525 prop[0] = 0x1;
2526 prop[1] = 0x0;
2527 prop[2] = rloc;
2528 prop[3] = 0x0;
2529 prop[4] = 0x0;
2530 prop[5] = 0x00010000;
2531 prom_setprop(ph, name, "ranges", prop, sizeof(prop));
2532 }
2533 }
2534
2535 name = "/pci@80000000/ide@C,1";
2536 ph = call_prom("finddevice", 1, 1, ADDR(name));
2537 if (PHANDLE_VALID(ph)) {
2538 prom_printf("Fixing up IDE interrupt on Pegasos...\n");
2539 prop[0] = 14;
2540 prop[1] = 0x0;
2541 prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32));
2542 prom_printf("Fixing up IDE class-code on Pegasos...\n");
2543 rc = prom_getprop(ph, "class-code", prop, sizeof(u32));
2544 if (rc == sizeof(u32)) {
2545 prop[0] &= ~0x5;
2546 prom_setprop(ph, name, "class-code", prop, sizeof(u32));
2547 }
2548 }
2549}
2550#else
2551#define fixup_device_tree_chrp()
2552#endif
2553
2554#if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)
2555static void __init fixup_device_tree_pmac(void)
2556{
2557 phandle u3, i2c, mpic;
2558 u32 u3_rev;
2559 u32 interrupts[2];
2560 u32 parent;
2561
2562 /* Some G5s have a missing interrupt definition, fix it up here */
2563 u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000"));
2564 if (!PHANDLE_VALID(u3))
2565 return;
2566 i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000"));
2567 if (!PHANDLE_VALID(i2c))
2568 return;
2569 mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000"));
2570 if (!PHANDLE_VALID(mpic))
2571 return;
2572
2573 /* check if proper rev of u3 */
2574 if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev))
2575 == PROM_ERROR)
2576 return;
2577 if (u3_rev < 0x35 || u3_rev > 0x39)
2578 return;
2579 /* does it need fixup ? */
2580 if (prom_getproplen(i2c, "interrupts") > 0)
2581 return;
2582
2583 prom_printf("fixing up bogus interrupts for u3 i2c...\n");
2584
2585 /* interrupt on this revision of u3 is number 0 and level */
2586 interrupts[0] = 0;
2587 interrupts[1] = 1;
2588 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts",
2589 &interrupts, sizeof(interrupts));
2590 parent = (u32)mpic;
2591 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent",
2592 &parent, sizeof(parent));
2593}
2594#else
2595#define fixup_device_tree_pmac()
2596#endif
2597
2598#ifdef CONFIG_PPC_EFIKA
2599/*
2600 * The MPC5200 FEC driver requires an phy-handle property to tell it how
2601 * to talk to the phy. If the phy-handle property is missing, then this
2602 * function is called to add the appropriate nodes and link it to the
2603 * ethernet node.
2604 */
2605static void __init fixup_device_tree_efika_add_phy(void)
2606{
2607 u32 node;
2608 char prop[64];
2609 int rv;
2610
2611 /* Check if /builtin/ethernet exists - bail if it doesn't */
2612 node = call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet"));
2613 if (!PHANDLE_VALID(node))
2614 return;
2615
2616 /* Check if the phy-handle property exists - bail if it does */
2617 rv = prom_getprop(node, "phy-handle", prop, sizeof(prop));
2618 if (!rv)
2619 return;
2620
2621 /*
2622 * At this point the ethernet device doesn't have a phy described.
2623 * Now we need to add the missing phy node and linkage
2624 */
2625
2626 /* Check for an MDIO bus node - if missing then create one */
2627 node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio"));
2628 if (!PHANDLE_VALID(node)) {
2629 prom_printf("Adding Ethernet MDIO node\n");
2630 call_prom("interpret", 1, 1,
2631 " s\" /builtin\" find-device"
2632 " new-device"
2633 " 1 encode-int s\" #address-cells\" property"
2634 " 0 encode-int s\" #size-cells\" property"
2635 " s\" mdio\" device-name"
2636 " s\" fsl,mpc5200b-mdio\" encode-string"
2637 " s\" compatible\" property"
2638 " 0xf0003000 0x400 reg"
2639 " 0x2 encode-int"
2640 " 0x5 encode-int encode+"
2641 " 0x3 encode-int encode+"
2642 " s\" interrupts\" property"
2643 " finish-device");
2644 };
2645
2646 /* Check for a PHY device node - if missing then create one and
2647 * give it's phandle to the ethernet node */
2648 node = call_prom("finddevice", 1, 1,
2649 ADDR("/builtin/mdio/ethernet-phy"));
2650 if (!PHANDLE_VALID(node)) {
2651 prom_printf("Adding Ethernet PHY node\n");
2652 call_prom("interpret", 1, 1,
2653 " s\" /builtin/mdio\" find-device"
2654 " new-device"
2655 " s\" ethernet-phy\" device-name"
2656 " 0x10 encode-int s\" reg\" property"
2657 " my-self"
2658 " ihandle>phandle"
2659 " finish-device"
2660 " s\" /builtin/ethernet\" find-device"
2661 " encode-int"
2662 " s\" phy-handle\" property"
2663 " device-end");
2664 }
2665}
2666
2667static void __init fixup_device_tree_efika(void)
2668{
2669 int sound_irq[3] = { 2, 2, 0 };
2670 int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0,
2671 3,4,0, 3,5,0, 3,6,0, 3,7,0,
2672 3,8,0, 3,9,0, 3,10,0, 3,11,0,
2673 3,12,0, 3,13,0, 3,14,0, 3,15,0 };
2674 u32 node;
2675 char prop[64];
2676 int rv, len;
2677
2678 /* Check if we're really running on a EFIKA */
2679 node = call_prom("finddevice", 1, 1, ADDR("/"));
2680 if (!PHANDLE_VALID(node))
2681 return;
2682
2683 rv = prom_getprop(node, "model", prop, sizeof(prop));
2684 if (rv == PROM_ERROR)
2685 return;
2686 if (strcmp(prop, "EFIKA5K2"))
2687 return;
2688
2689 prom_printf("Applying EFIKA device tree fixups\n");
2690
2691 /* Claiming to be 'chrp' is death */
2692 node = call_prom("finddevice", 1, 1, ADDR("/"));
2693 rv = prom_getprop(node, "device_type", prop, sizeof(prop));
2694 if (rv != PROM_ERROR && (strcmp(prop, "chrp") == 0))
2695 prom_setprop(node, "/", "device_type", "efika", sizeof("efika"));
2696
2697 /* CODEGEN,description is exposed in /proc/cpuinfo so
2698 fix that too */
2699 rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop));
2700 if (rv != PROM_ERROR && (strstr(prop, "CHRP")))
2701 prom_setprop(node, "/", "CODEGEN,description",
2702 "Efika 5200B PowerPC System",
2703 sizeof("Efika 5200B PowerPC System"));
2704
2705 /* Fixup bestcomm interrupts property */
2706 node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm"));
2707 if (PHANDLE_VALID(node)) {
2708 len = prom_getproplen(node, "interrupts");
2709 if (len == 12) {
2710 prom_printf("Fixing bestcomm interrupts property\n");
2711 prom_setprop(node, "/builtin/bestcom", "interrupts",
2712 bcomm_irq, sizeof(bcomm_irq));
2713 }
2714 }
2715
2716 /* Fixup sound interrupts property */
2717 node = call_prom("finddevice", 1, 1, ADDR("/builtin/sound"));
2718 if (PHANDLE_VALID(node)) {
2719 rv = prom_getprop(node, "interrupts", prop, sizeof(prop));
2720 if (rv == PROM_ERROR) {
2721 prom_printf("Adding sound interrupts property\n");
2722 prom_setprop(node, "/builtin/sound", "interrupts",
2723 sound_irq, sizeof(sound_irq));
2724 }
2725 }
2726
2727 /* Make sure ethernet phy-handle property exists */
2728 fixup_device_tree_efika_add_phy();
2729}
2730#else
2731#define fixup_device_tree_efika()
2732#endif
2733
2734#ifdef CONFIG_PPC_PASEMI_NEMO
2735/*
2736 * CFE supplied on Nemo is broken in several ways, biggest
2737 * problem is that it reassigns ISA interrupts to unused mpic ints.
2738 * Add an interrupt-controller property for the io-bridge to use
2739 * and correct the ints so we can attach them to an irq_domain
2740 */
2741static void __init fixup_device_tree_pasemi(void)
2742{
2743 u32 interrupts[2], parent, rval, val = 0;
2744 char *name, *pci_name;
2745 phandle iob, node;
2746
2747 /* Find the root pci node */
2748 name = "/pxp@0,e0000000";
2749 iob = call_prom("finddevice", 1, 1, ADDR(name));
2750 if (!PHANDLE_VALID(iob))
2751 return;
2752
2753 /* check if interrupt-controller node set yet */
2754 if (prom_getproplen(iob, "interrupt-controller") !=PROM_ERROR)
2755 return;
2756
2757 prom_printf("adding interrupt-controller property for SB600...\n");
2758
2759 prom_setprop(iob, name, "interrupt-controller", &val, 0);
2760
2761 pci_name = "/pxp@0,e0000000/pci@11";
2762 node = call_prom("finddevice", 1, 1, ADDR(pci_name));
2763 parent = ADDR(iob);
2764
2765 for( ; prom_next_node(&node); ) {
2766 /* scan each node for one with an interrupt */
2767 if (!PHANDLE_VALID(node))
2768 continue;
2769
2770 rval = prom_getproplen(node, "interrupts");
2771 if (rval == 0 || rval == PROM_ERROR)
2772 continue;
2773
2774 prom_getprop(node, "interrupts", &interrupts, sizeof(interrupts));
2775 if ((interrupts[0] < 212) || (interrupts[0] > 222))
2776 continue;
2777
2778 /* found a node, update both interrupts and interrupt-parent */
2779 if ((interrupts[0] >= 212) && (interrupts[0] <= 215))
2780 interrupts[0] -= 203;
2781 if ((interrupts[0] >= 216) && (interrupts[0] <= 220))
2782 interrupts[0] -= 213;
2783 if (interrupts[0] == 221)
2784 interrupts[0] = 14;
2785 if (interrupts[0] == 222)
2786 interrupts[0] = 8;
2787
2788 prom_setprop(node, pci_name, "interrupts", interrupts,
2789 sizeof(interrupts));
2790 prom_setprop(node, pci_name, "interrupt-parent", &parent,
2791 sizeof(parent));
2792 }
2793
2794 /*
2795 * The io-bridge has device_type set to 'io-bridge' change it to 'isa'
2796 * so that generic isa-bridge code can add the SB600 and its on-board
2797 * peripherals.
2798 */
2799 name = "/pxp@0,e0000000/io-bridge@0";
2800 iob = call_prom("finddevice", 1, 1, ADDR(name));
2801 if (!PHANDLE_VALID(iob))
2802 return;
2803
2804 /* device_type is already set, just change it. */
2805
2806 prom_printf("Changing device_type of SB600 node...\n");
2807
2808 prom_setprop(iob, name, "device_type", "isa", sizeof("isa"));
2809}
2810#else /* !CONFIG_PPC_PASEMI_NEMO */
2811static inline void fixup_device_tree_pasemi(void) { }
2812#endif
2813
2814static void __init fixup_device_tree(void)
2815{
2816 fixup_device_tree_maple();
2817 fixup_device_tree_maple_memory_controller();
2818 fixup_device_tree_chrp();
2819 fixup_device_tree_pmac();
2820 fixup_device_tree_efika();
2821 fixup_device_tree_pasemi();
2822}
2823
2824static void __init prom_find_boot_cpu(void)
2825{
2826 __be32 rval;
2827 ihandle prom_cpu;
2828 phandle cpu_pkg;
2829
2830 rval = 0;
2831 if (prom_getprop(prom.chosen, "cpu", &rval, sizeof(rval)) <= 0)
2832 return;
2833 prom_cpu = be32_to_cpu(rval);
2834
2835 cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu);
2836
2837 if (!PHANDLE_VALID(cpu_pkg))
2838 return;
2839
2840 prom_getprop(cpu_pkg, "reg", &rval, sizeof(rval));
2841 prom.cpu = be32_to_cpu(rval);
2842
2843 prom_debug("Booting CPU hw index = %lu\n", prom.cpu);
2844}
2845
2846static void __init prom_check_initrd(unsigned long r3, unsigned long r4)
2847{
2848#ifdef CONFIG_BLK_DEV_INITRD
2849 if (r3 && r4 && r4 != 0xdeadbeef) {
2850 __be64 val;
2851
2852 prom_initrd_start = is_kernel_addr(r3) ? __pa(r3) : r3;
2853 prom_initrd_end = prom_initrd_start + r4;
2854
2855 val = cpu_to_be64(prom_initrd_start);
2856 prom_setprop(prom.chosen, "/chosen", "linux,initrd-start",
2857 &val, sizeof(val));
2858 val = cpu_to_be64(prom_initrd_end);
2859 prom_setprop(prom.chosen, "/chosen", "linux,initrd-end",
2860 &val, sizeof(val));
2861
2862 reserve_mem(prom_initrd_start,
2863 prom_initrd_end - prom_initrd_start);
2864
2865 prom_debug("initrd_start=0x%x\n", prom_initrd_start);
2866 prom_debug("initrd_end=0x%x\n", prom_initrd_end);
2867 }
2868#endif /* CONFIG_BLK_DEV_INITRD */
2869}
2870
2871#ifdef CONFIG_PPC64
2872#ifdef CONFIG_RELOCATABLE
2873static void reloc_toc(void)
2874{
2875}
2876
2877static void unreloc_toc(void)
2878{
2879}
2880#else
2881static void __reloc_toc(unsigned long offset, unsigned long nr_entries)
2882{
2883 unsigned long i;
2884 unsigned long *toc_entry;
2885
2886 /* Get the start of the TOC by using r2 directly. */
2887 asm volatile("addi %0,2,-0x8000" : "=b" (toc_entry));
2888
2889 for (i = 0; i < nr_entries; i++) {
2890 *toc_entry = *toc_entry + offset;
2891 toc_entry++;
2892 }
2893}
2894
2895static void reloc_toc(void)
2896{
2897 unsigned long offset = reloc_offset();
2898 unsigned long nr_entries =
2899 (__prom_init_toc_end - __prom_init_toc_start) / sizeof(long);
2900
2901 __reloc_toc(offset, nr_entries);
2902
2903 mb();
2904}
2905
2906static void unreloc_toc(void)
2907{
2908 unsigned long offset = reloc_offset();
2909 unsigned long nr_entries =
2910 (__prom_init_toc_end - __prom_init_toc_start) / sizeof(long);
2911
2912 mb();
2913
2914 __reloc_toc(-offset, nr_entries);
2915}
2916#endif
2917#endif
2918
2919/*
2920 * We enter here early on, when the Open Firmware prom is still
2921 * handling exceptions and the MMU hash table for us.
2922 */
2923
2924unsigned long __init prom_init(unsigned long r3, unsigned long r4,
2925 unsigned long pp,
2926 unsigned long r6, unsigned long r7,
2927 unsigned long kbase)
2928{
2929 unsigned long hdr;
2930
2931#ifdef CONFIG_PPC32
2932 unsigned long offset = reloc_offset();
2933 reloc_got2(offset);
2934#else
2935 reloc_toc();
2936#endif
2937
2938 /*
2939 * First zero the BSS
2940 */
2941 memset(&__bss_start, 0, __bss_stop - __bss_start);
2942
2943 /*
2944 * Init interface to Open Firmware, get some node references,
2945 * like /chosen
2946 */
2947 prom_init_client_services(pp);
2948
2949 /*
2950 * See if this OF is old enough that we need to do explicit maps
2951 * and other workarounds
2952 */
2953 prom_find_mmu();
2954
2955 /*
2956 * Init prom stdout device
2957 */
2958 prom_init_stdout();
2959
2960 prom_printf("Preparing to boot %s", linux_banner);
2961
2962 /*
2963 * Get default machine type. At this point, we do not differentiate
2964 * between pSeries SMP and pSeries LPAR
2965 */
2966 of_platform = prom_find_machine_type();
2967 prom_printf("Detected machine type: %x\n", of_platform);
2968
2969#ifndef CONFIG_NONSTATIC_KERNEL
2970 /* Bail if this is a kdump kernel. */
2971 if (PHYSICAL_START > 0)
2972 prom_panic("Error: You can't boot a kdump kernel from OF!\n");
2973#endif
2974
2975 /*
2976 * Check for an initrd
2977 */
2978 prom_check_initrd(r3, r4);
2979
2980#if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
2981 /*
2982 * On pSeries, inform the firmware about our capabilities
2983 */
2984 if (of_platform == PLATFORM_PSERIES ||
2985 of_platform == PLATFORM_PSERIES_LPAR)
2986 prom_send_capabilities();
2987#endif
2988
2989 /*
2990 * Copy the CPU hold code
2991 */
2992 if (of_platform != PLATFORM_POWERMAC)
2993 copy_and_flush(0, kbase, 0x100, 0);
2994
2995 /*
2996 * Do early parsing of command line
2997 */
2998 early_cmdline_parse();
2999
3000 /*
3001 * Initialize memory management within prom_init
3002 */
3003 prom_init_mem();
3004
3005 /*
3006 * Determine which cpu is actually running right _now_
3007 */
3008 prom_find_boot_cpu();
3009
3010 /*
3011 * Initialize display devices
3012 */
3013 prom_check_displays();
3014
3015#if defined(CONFIG_PPC64) && defined(__BIG_ENDIAN__)
3016 /*
3017 * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else
3018 * that uses the allocator, we need to make sure we get the top of memory
3019 * available for us here...
3020 */
3021 if (of_platform == PLATFORM_PSERIES)
3022 prom_initialize_tce_table();
3023#endif
3024
3025 /*
3026 * On non-powermacs, try to instantiate RTAS. PowerMacs don't
3027 * have a usable RTAS implementation.
3028 */
3029 if (of_platform != PLATFORM_POWERMAC &&
3030 of_platform != PLATFORM_OPAL)
3031 prom_instantiate_rtas();
3032
3033#ifdef CONFIG_PPC_POWERNV
3034 if (of_platform == PLATFORM_OPAL)
3035 prom_instantiate_opal();
3036#endif /* CONFIG_PPC_POWERNV */
3037
3038#ifdef CONFIG_PPC64
3039 /* instantiate sml */
3040 prom_instantiate_sml();
3041#endif
3042
3043 /*
3044 * On non-powermacs, put all CPUs in spin-loops.
3045 *
3046 * PowerMacs use a different mechanism to spin CPUs
3047 *
3048 * (This must be done after instanciating RTAS)
3049 */
3050 if (of_platform != PLATFORM_POWERMAC &&
3051 of_platform != PLATFORM_OPAL)
3052 prom_hold_cpus();
3053
3054 /*
3055 * Fill in some infos for use by the kernel later on
3056 */
3057 if (prom_memory_limit) {
3058 __be64 val = cpu_to_be64(prom_memory_limit);
3059 prom_setprop(prom.chosen, "/chosen", "linux,memory-limit",
3060 &val, sizeof(val));
3061 }
3062#ifdef CONFIG_PPC64
3063 if (prom_iommu_off)
3064 prom_setprop(prom.chosen, "/chosen", "linux,iommu-off",
3065 NULL, 0);
3066
3067 if (prom_iommu_force_on)
3068 prom_setprop(prom.chosen, "/chosen", "linux,iommu-force-on",
3069 NULL, 0);
3070
3071 if (prom_tce_alloc_start) {
3072 prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-start",
3073 &prom_tce_alloc_start,
3074 sizeof(prom_tce_alloc_start));
3075 prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-end",
3076 &prom_tce_alloc_end,
3077 sizeof(prom_tce_alloc_end));
3078 }
3079#endif
3080
3081 /*
3082 * Fixup any known bugs in the device-tree
3083 */
3084 fixup_device_tree();
3085
3086 /*
3087 * Now finally create the flattened device-tree
3088 */
3089 prom_printf("copying OF device tree...\n");
3090 flatten_device_tree();
3091
3092 /*
3093 * in case stdin is USB and still active on IBM machines...
3094 * Unfortunately quiesce crashes on some powermacs if we have
3095 * closed stdin already (in particular the powerbook 101). It
3096 * appears that the OPAL version of OFW doesn't like it either.
3097 */
3098 if (of_platform != PLATFORM_POWERMAC &&
3099 of_platform != PLATFORM_OPAL)
3100 prom_close_stdin();
3101
3102 /*
3103 * Call OF "quiesce" method to shut down pending DMA's from
3104 * devices etc...
3105 */
3106 prom_printf("Quiescing Open Firmware ...\n");
3107 call_prom("quiesce", 0, 0);
3108
3109 /*
3110 * And finally, call the kernel passing it the flattened device
3111 * tree and NULL as r5, thus triggering the new entry point which
3112 * is common to us and kexec
3113 */
3114 hdr = dt_header_start;
3115
3116 /* Don't print anything after quiesce under OPAL, it crashes OFW */
3117 if (of_platform != PLATFORM_OPAL) {
3118 prom_printf("Booting Linux via __start() @ 0x%lx ...\n", kbase);
3119 prom_debug("->dt_header_start=0x%x\n", hdr);
3120 }
3121
3122#ifdef CONFIG_PPC32
3123 reloc_got2(-offset);
3124#else
3125 unreloc_toc();
3126#endif
3127
3128#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
3129 /* OPAL early debug gets the OPAL base & entry in r8 and r9 */
3130 __start(hdr, kbase, 0, 0, 0,
3131 prom_opal_base, prom_opal_entry);
3132#else
3133 __start(hdr, kbase, 0, 0, 0, 0, 0);
3134#endif
3135
3136 return 0;
3137}