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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 <linux/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 <linux/of.h>
32#include <linux/of_fdt.h>
33#include <asm/prom.h>
34#include <asm/rtas.h>
35#include <asm/page.h>
36#include <asm/processor.h>
37#include <asm/interrupt.h>
38#include <asm/irq.h>
39#include <asm/io.h>
40#include <asm/smp.h>
41#include <asm/mmu.h>
42#include <asm/iommu.h>
43#include <asm/btext.h>
44#include <asm/sections.h>
45#include <asm/setup.h>
46#include <asm/asm-prototypes.h>
47#include <asm/ultravisor-api.h>
48
49#include <linux/linux_logo.h>
50
51/* All of prom_init bss lives here */
52#define __prombss __section(".bss.prominit")
53
54/*
55 * Eventually bump that one up
56 */
57#define DEVTREE_CHUNK_SIZE 0x100000
58
59/*
60 * This is the size of the local memory reserve map that gets copied
61 * into the boot params passed to the kernel. That size is totally
62 * flexible as the kernel just reads the list until it encounters an
63 * entry with size 0, so it can be changed without breaking binary
64 * compatibility
65 */
66#define MEM_RESERVE_MAP_SIZE 8
67
68/*
69 * prom_init() is called very early on, before the kernel text
70 * and data have been mapped to KERNELBASE. At this point the code
71 * is running at whatever address it has been loaded at.
72 * On ppc32 we compile with -mrelocatable, which means that references
73 * to extern and static variables get relocated automatically.
74 * ppc64 objects are always relocatable, we just need to relocate the
75 * TOC.
76 *
77 * Because OF may have mapped I/O devices into the area starting at
78 * KERNELBASE, particularly on CHRP machines, we can't safely call
79 * OF once the kernel has been mapped to KERNELBASE. Therefore all
80 * OF calls must be done within prom_init().
81 *
82 * ADDR is used in calls to call_prom. The 4th and following
83 * arguments to call_prom should be 32-bit values.
84 * On ppc64, 64 bit values are truncated to 32 bits (and
85 * fortunately don't get interpreted as two arguments).
86 */
87#define ADDR(x) (u32)(unsigned long)(x)
88
89#ifdef CONFIG_PPC64
90#define OF_WORKAROUNDS 0
91#else
92#define OF_WORKAROUNDS of_workarounds
93static int of_workarounds __prombss;
94#endif
95
96#define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */
97#define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */
98
99#ifdef DEBUG_PROM
100#define prom_debug(x...) prom_printf(x)
101#else
102#define prom_debug(x...) do { } while (0)
103#endif
104
105
106typedef u32 prom_arg_t;
107
108struct prom_args {
109 __be32 service;
110 __be32 nargs;
111 __be32 nret;
112 __be32 args[10];
113};
114
115struct prom_t {
116 ihandle root;
117 phandle chosen;
118 int cpu;
119 ihandle stdout;
120 ihandle mmumap;
121 ihandle memory;
122};
123
124struct mem_map_entry {
125 __be64 base;
126 __be64 size;
127};
128
129typedef __be32 cell_t;
130
131extern void __start(unsigned long r3, unsigned long r4, unsigned long r5,
132 unsigned long r6, unsigned long r7, unsigned long r8,
133 unsigned long r9);
134
135#ifdef CONFIG_PPC64
136extern int enter_prom(struct prom_args *args, unsigned long entry);
137#else
138static inline int enter_prom(struct prom_args *args, unsigned long entry)
139{
140 return ((int (*)(struct prom_args *))entry)(args);
141}
142#endif
143
144extern void copy_and_flush(unsigned long dest, unsigned long src,
145 unsigned long size, unsigned long offset);
146
147/* prom structure */
148static struct prom_t __prombss prom;
149
150static unsigned long __prombss prom_entry;
151
152static char __prombss of_stdout_device[256];
153static char __prombss prom_scratch[256];
154
155static unsigned long __prombss dt_header_start;
156static unsigned long __prombss dt_struct_start, dt_struct_end;
157static unsigned long __prombss dt_string_start, dt_string_end;
158
159static unsigned long __prombss prom_initrd_start, prom_initrd_end;
160
161#ifdef CONFIG_PPC64
162static int __prombss prom_iommu_force_on;
163static int __prombss prom_iommu_off;
164static unsigned long __prombss prom_tce_alloc_start;
165static unsigned long __prombss prom_tce_alloc_end;
166#endif
167
168#ifdef CONFIG_PPC_PSERIES
169static bool __prombss prom_radix_disable;
170static bool __prombss prom_radix_gtse_disable;
171static bool __prombss prom_xive_disable;
172#endif
173
174#ifdef CONFIG_PPC_SVM
175static bool __prombss prom_svm_enable;
176#endif
177
178struct platform_support {
179 bool hash_mmu;
180 bool radix_mmu;
181 bool radix_gtse;
182 bool xive;
183};
184
185/* Platforms codes are now obsolete in the kernel. Now only used within this
186 * file and ultimately gone too. Feel free to change them if you need, they
187 * are not shared with anything outside of this file anymore
188 */
189#define PLATFORM_PSERIES 0x0100
190#define PLATFORM_PSERIES_LPAR 0x0101
191#define PLATFORM_LPAR 0x0001
192#define PLATFORM_POWERMAC 0x0400
193#define PLATFORM_GENERIC 0x0500
194
195static int __prombss of_platform;
196
197static char __prombss prom_cmd_line[COMMAND_LINE_SIZE];
198
199static unsigned long __prombss prom_memory_limit;
200
201static unsigned long __prombss alloc_top;
202static unsigned long __prombss alloc_top_high;
203static unsigned long __prombss alloc_bottom;
204static unsigned long __prombss rmo_top;
205static unsigned long __prombss ram_top;
206
207static struct mem_map_entry __prombss mem_reserve_map[MEM_RESERVE_MAP_SIZE];
208static int __prombss mem_reserve_cnt;
209
210static cell_t __prombss regbuf[1024];
211
212static bool __prombss rtas_has_query_cpu_stopped;
213
214
215/*
216 * Error results ... some OF calls will return "-1" on error, some
217 * will return 0, some will return either. To simplify, here are
218 * macros to use with any ihandle or phandle return value to check if
219 * it is valid
220 */
221
222#define PROM_ERROR (-1u)
223#define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR)
224#define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR)
225
226/* Copied from lib/string.c and lib/kstrtox.c */
227
228static int __init prom_strcmp(const char *cs, const char *ct)
229{
230 unsigned char c1, c2;
231
232 while (1) {
233 c1 = *cs++;
234 c2 = *ct++;
235 if (c1 != c2)
236 return c1 < c2 ? -1 : 1;
237 if (!c1)
238 break;
239 }
240 return 0;
241}
242
243static ssize_t __init prom_strscpy_pad(char *dest, const char *src, size_t n)
244{
245 ssize_t rc;
246 size_t i;
247
248 if (n == 0 || n > INT_MAX)
249 return -E2BIG;
250
251 // Copy up to n bytes
252 for (i = 0; i < n && src[i] != '\0'; i++)
253 dest[i] = src[i];
254
255 rc = i;
256
257 // If we copied all n then we have run out of space for the nul
258 if (rc == n) {
259 // Rewind by one character to ensure nul termination
260 i--;
261 rc = -E2BIG;
262 }
263
264 for (; i < n; i++)
265 dest[i] = '\0';
266
267 return rc;
268}
269
270static int __init prom_strncmp(const char *cs, const char *ct, size_t count)
271{
272 unsigned char c1, c2;
273
274 while (count) {
275 c1 = *cs++;
276 c2 = *ct++;
277 if (c1 != c2)
278 return c1 < c2 ? -1 : 1;
279 if (!c1)
280 break;
281 count--;
282 }
283 return 0;
284}
285
286static size_t __init prom_strlen(const char *s)
287{
288 const char *sc;
289
290 for (sc = s; *sc != '\0'; ++sc)
291 /* nothing */;
292 return sc - s;
293}
294
295static int __init prom_memcmp(const void *cs, const void *ct, size_t count)
296{
297 const unsigned char *su1, *su2;
298 int res = 0;
299
300 for (su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
301 if ((res = *su1 - *su2) != 0)
302 break;
303 return res;
304}
305
306static char __init *prom_strstr(const char *s1, const char *s2)
307{
308 size_t l1, l2;
309
310 l2 = prom_strlen(s2);
311 if (!l2)
312 return (char *)s1;
313 l1 = prom_strlen(s1);
314 while (l1 >= l2) {
315 l1--;
316 if (!prom_memcmp(s1, s2, l2))
317 return (char *)s1;
318 s1++;
319 }
320 return NULL;
321}
322
323static size_t __init prom_strlcat(char *dest, const char *src, size_t count)
324{
325 size_t dsize = prom_strlen(dest);
326 size_t len = prom_strlen(src);
327 size_t res = dsize + len;
328
329 /* This would be a bug */
330 if (dsize >= count)
331 return count;
332
333 dest += dsize;
334 count -= dsize;
335 if (len >= count)
336 len = count-1;
337 memcpy(dest, src, len);
338 dest[len] = 0;
339 return res;
340
341}
342
343#ifdef CONFIG_PPC_PSERIES
344static int __init prom_strtobool(const char *s, bool *res)
345{
346 if (!s)
347 return -EINVAL;
348
349 switch (s[0]) {
350 case 'y':
351 case 'Y':
352 case '1':
353 *res = true;
354 return 0;
355 case 'n':
356 case 'N':
357 case '0':
358 *res = false;
359 return 0;
360 case 'o':
361 case 'O':
362 switch (s[1]) {
363 case 'n':
364 case 'N':
365 *res = true;
366 return 0;
367 case 'f':
368 case 'F':
369 *res = false;
370 return 0;
371 default:
372 break;
373 }
374 break;
375 default:
376 break;
377 }
378
379 return -EINVAL;
380}
381#endif
382
383/* This is the one and *ONLY* place where we actually call open
384 * firmware.
385 */
386
387static int __init call_prom(const char *service, int nargs, int nret, ...)
388{
389 int i;
390 struct prom_args args;
391 va_list list;
392
393 args.service = cpu_to_be32(ADDR(service));
394 args.nargs = cpu_to_be32(nargs);
395 args.nret = cpu_to_be32(nret);
396
397 va_start(list, nret);
398 for (i = 0; i < nargs; i++)
399 args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
400 va_end(list);
401
402 for (i = 0; i < nret; i++)
403 args.args[nargs+i] = 0;
404
405 if (enter_prom(&args, prom_entry) < 0)
406 return PROM_ERROR;
407
408 return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
409}
410
411static int __init call_prom_ret(const char *service, int nargs, int nret,
412 prom_arg_t *rets, ...)
413{
414 int i;
415 struct prom_args args;
416 va_list list;
417
418 args.service = cpu_to_be32(ADDR(service));
419 args.nargs = cpu_to_be32(nargs);
420 args.nret = cpu_to_be32(nret);
421
422 va_start(list, rets);
423 for (i = 0; i < nargs; i++)
424 args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
425 va_end(list);
426
427 for (i = 0; i < nret; i++)
428 args.args[nargs+i] = 0;
429
430 if (enter_prom(&args, prom_entry) < 0)
431 return PROM_ERROR;
432
433 if (rets != NULL)
434 for (i = 1; i < nret; ++i)
435 rets[i-1] = be32_to_cpu(args.args[nargs+i]);
436
437 return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
438}
439
440
441static void __init prom_print(const char *msg)
442{
443 const char *p, *q;
444
445 if (prom.stdout == 0)
446 return;
447
448 for (p = msg; *p != 0; p = q) {
449 for (q = p; *q != 0 && *q != '\n'; ++q)
450 ;
451 if (q > p)
452 call_prom("write", 3, 1, prom.stdout, p, q - p);
453 if (*q == 0)
454 break;
455 ++q;
456 call_prom("write", 3, 1, prom.stdout, ADDR("\r\n"), 2);
457 }
458}
459
460
461/*
462 * Both prom_print_hex & prom_print_dec takes an unsigned long as input so that
463 * we do not need __udivdi3 or __umoddi3 on 32bits.
464 */
465static void __init prom_print_hex(unsigned long val)
466{
467 int i, nibbles = sizeof(val)*2;
468 char buf[sizeof(val)*2+1];
469
470 for (i = nibbles-1; i >= 0; i--) {
471 buf[i] = (val & 0xf) + '0';
472 if (buf[i] > '9')
473 buf[i] += ('a'-'0'-10);
474 val >>= 4;
475 }
476 buf[nibbles] = '\0';
477 call_prom("write", 3, 1, prom.stdout, buf, nibbles);
478}
479
480/* max number of decimal digits in an unsigned long */
481#define UL_DIGITS 21
482static void __init prom_print_dec(unsigned long val)
483{
484 int i, size;
485 char buf[UL_DIGITS+1];
486
487 for (i = UL_DIGITS-1; i >= 0; i--) {
488 buf[i] = (val % 10) + '0';
489 val = val/10;
490 if (val == 0)
491 break;
492 }
493 /* shift stuff down */
494 size = UL_DIGITS - i;
495 call_prom("write", 3, 1, prom.stdout, buf+i, size);
496}
497
498__printf(1, 2)
499static void __init prom_printf(const char *format, ...)
500{
501 const char *p, *q, *s;
502 va_list args;
503 unsigned long v;
504 long vs;
505 int n = 0;
506
507 va_start(args, format);
508 for (p = format; *p != 0; p = q) {
509 for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q)
510 ;
511 if (q > p)
512 call_prom("write", 3, 1, prom.stdout, p, q - p);
513 if (*q == 0)
514 break;
515 if (*q == '\n') {
516 ++q;
517 call_prom("write", 3, 1, prom.stdout,
518 ADDR("\r\n"), 2);
519 continue;
520 }
521 ++q;
522 if (*q == 0)
523 break;
524 while (*q == 'l') {
525 ++q;
526 ++n;
527 }
528 switch (*q) {
529 case 's':
530 ++q;
531 s = va_arg(args, const char *);
532 prom_print(s);
533 break;
534 case 'x':
535 ++q;
536 switch (n) {
537 case 0:
538 v = va_arg(args, unsigned int);
539 break;
540 case 1:
541 v = va_arg(args, unsigned long);
542 break;
543 case 2:
544 default:
545 v = va_arg(args, unsigned long long);
546 break;
547 }
548 prom_print_hex(v);
549 break;
550 case 'u':
551 ++q;
552 switch (n) {
553 case 0:
554 v = va_arg(args, unsigned int);
555 break;
556 case 1:
557 v = va_arg(args, unsigned long);
558 break;
559 case 2:
560 default:
561 v = va_arg(args, unsigned long long);
562 break;
563 }
564 prom_print_dec(v);
565 break;
566 case 'd':
567 ++q;
568 switch (n) {
569 case 0:
570 vs = va_arg(args, int);
571 break;
572 case 1:
573 vs = va_arg(args, long);
574 break;
575 case 2:
576 default:
577 vs = va_arg(args, long long);
578 break;
579 }
580 if (vs < 0) {
581 prom_print("-");
582 vs = -vs;
583 }
584 prom_print_dec(vs);
585 break;
586 }
587 }
588 va_end(args);
589}
590
591
592static unsigned int __init prom_claim(unsigned long virt, unsigned long size,
593 unsigned long align)
594{
595
596 if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) {
597 /*
598 * Old OF requires we claim physical and virtual separately
599 * and then map explicitly (assuming virtual mode)
600 */
601 int ret;
602 prom_arg_t result;
603
604 ret = call_prom_ret("call-method", 5, 2, &result,
605 ADDR("claim"), prom.memory,
606 align, size, virt);
607 if (ret != 0 || result == -1)
608 return -1;
609 ret = call_prom_ret("call-method", 5, 2, &result,
610 ADDR("claim"), prom.mmumap,
611 align, size, virt);
612 if (ret != 0) {
613 call_prom("call-method", 4, 1, ADDR("release"),
614 prom.memory, size, virt);
615 return -1;
616 }
617 /* the 0x12 is M (coherence) + PP == read/write */
618 call_prom("call-method", 6, 1,
619 ADDR("map"), prom.mmumap, 0x12, size, virt, virt);
620 return virt;
621 }
622 return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size,
623 (prom_arg_t)align);
624}
625
626static void __init __attribute__((noreturn)) prom_panic(const char *reason)
627{
628 prom_print(reason);
629 /* Do not call exit because it clears the screen on pmac
630 * it also causes some sort of double-fault on early pmacs */
631 if (of_platform == PLATFORM_POWERMAC)
632 asm("trap\n");
633
634 /* ToDo: should put up an SRC here on pSeries */
635 call_prom("exit", 0, 0);
636
637 for (;;) /* should never get here */
638 ;
639}
640
641
642static int __init prom_next_node(phandle *nodep)
643{
644 phandle node;
645
646 if ((node = *nodep) != 0
647 && (*nodep = call_prom("child", 1, 1, node)) != 0)
648 return 1;
649 if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
650 return 1;
651 for (;;) {
652 if ((node = call_prom("parent", 1, 1, node)) == 0)
653 return 0;
654 if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
655 return 1;
656 }
657}
658
659static inline int __init prom_getprop(phandle node, const char *pname,
660 void *value, size_t valuelen)
661{
662 return call_prom("getprop", 4, 1, node, ADDR(pname),
663 (u32)(unsigned long) value, (u32) valuelen);
664}
665
666static inline int __init prom_getproplen(phandle node, const char *pname)
667{
668 return call_prom("getproplen", 2, 1, node, ADDR(pname));
669}
670
671static void __init add_string(char **str, const char *q)
672{
673 char *p = *str;
674
675 while (*q)
676 *p++ = *q++;
677 *p++ = ' ';
678 *str = p;
679}
680
681static char *__init tohex(unsigned int x)
682{
683 static const char digits[] __initconst = "0123456789abcdef";
684 static char result[9] __prombss;
685 int i;
686
687 result[8] = 0;
688 i = 8;
689 do {
690 --i;
691 result[i] = digits[x & 0xf];
692 x >>= 4;
693 } while (x != 0 && i > 0);
694 return &result[i];
695}
696
697static int __init prom_setprop(phandle node, const char *nodename,
698 const char *pname, void *value, size_t valuelen)
699{
700 char cmd[256], *p;
701
702 if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL))
703 return call_prom("setprop", 4, 1, node, ADDR(pname),
704 (u32)(unsigned long) value, (u32) valuelen);
705
706 /* gah... setprop doesn't work on longtrail, have to use interpret */
707 p = cmd;
708 add_string(&p, "dev");
709 add_string(&p, nodename);
710 add_string(&p, tohex((u32)(unsigned long) value));
711 add_string(&p, tohex(valuelen));
712 add_string(&p, tohex(ADDR(pname)));
713 add_string(&p, tohex(prom_strlen(pname)));
714 add_string(&p, "property");
715 *p = 0;
716 return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd);
717}
718
719/* We can't use the standard versions because of relocation headaches. */
720#define prom_isxdigit(c) \
721 (('0' <= (c) && (c) <= '9') || ('a' <= (c) && (c) <= 'f') || ('A' <= (c) && (c) <= 'F'))
722
723#define prom_isdigit(c) ('0' <= (c) && (c) <= '9')
724#define prom_islower(c) ('a' <= (c) && (c) <= 'z')
725#define prom_toupper(c) (prom_islower(c) ? ((c) - 'a' + 'A') : (c))
726
727static unsigned long __init prom_strtoul(const char *cp, const char **endp)
728{
729 unsigned long result = 0, base = 10, value;
730
731 if (*cp == '0') {
732 base = 8;
733 cp++;
734 if (prom_toupper(*cp) == 'X') {
735 cp++;
736 base = 16;
737 }
738 }
739
740 while (prom_isxdigit(*cp) &&
741 (value = prom_isdigit(*cp) ? *cp - '0' : prom_toupper(*cp) - 'A' + 10) < base) {
742 result = result * base + value;
743 cp++;
744 }
745
746 if (endp)
747 *endp = cp;
748
749 return result;
750}
751
752static unsigned long __init prom_memparse(const char *ptr, const char **retptr)
753{
754 unsigned long ret = prom_strtoul(ptr, retptr);
755 int shift = 0;
756
757 /*
758 * We can't use a switch here because GCC *may* generate a
759 * jump table which won't work, because we're not running at
760 * the address we're linked at.
761 */
762 if ('G' == **retptr || 'g' == **retptr)
763 shift = 30;
764
765 if ('M' == **retptr || 'm' == **retptr)
766 shift = 20;
767
768 if ('K' == **retptr || 'k' == **retptr)
769 shift = 10;
770
771 if (shift) {
772 ret <<= shift;
773 (*retptr)++;
774 }
775
776 return ret;
777}
778
779/*
780 * Early parsing of the command line passed to the kernel, used for
781 * "mem=x" and the options that affect the iommu
782 */
783static void __init early_cmdline_parse(void)
784{
785 const char *opt;
786
787 char *p;
788 int l = 0;
789
790 prom_cmd_line[0] = 0;
791 p = prom_cmd_line;
792
793 if (!IS_ENABLED(CONFIG_CMDLINE_FORCE) && (long)prom.chosen > 0)
794 l = prom_getprop(prom.chosen, "bootargs", p, COMMAND_LINE_SIZE-1);
795
796 if (IS_ENABLED(CONFIG_CMDLINE_EXTEND) || l <= 0 || p[0] == '\0')
797 prom_strlcat(prom_cmd_line, " " CONFIG_CMDLINE,
798 sizeof(prom_cmd_line));
799
800 prom_printf("command line: %s\n", prom_cmd_line);
801
802#ifdef CONFIG_PPC64
803 opt = prom_strstr(prom_cmd_line, "iommu=");
804 if (opt) {
805 prom_printf("iommu opt is: %s\n", opt);
806 opt += 6;
807 while (*opt && *opt == ' ')
808 opt++;
809 if (!prom_strncmp(opt, "off", 3))
810 prom_iommu_off = 1;
811 else if (!prom_strncmp(opt, "force", 5))
812 prom_iommu_force_on = 1;
813 }
814#endif
815 opt = prom_strstr(prom_cmd_line, "mem=");
816 if (opt) {
817 opt += 4;
818 prom_memory_limit = prom_memparse(opt, (const char **)&opt);
819#ifdef CONFIG_PPC64
820 /* Align down to 16 MB which is large page size with hash page translation */
821 prom_memory_limit = ALIGN_DOWN(prom_memory_limit, SZ_16M);
822#endif
823 }
824
825#ifdef CONFIG_PPC_PSERIES
826 prom_radix_disable = !IS_ENABLED(CONFIG_PPC_RADIX_MMU_DEFAULT);
827 opt = prom_strstr(prom_cmd_line, "disable_radix");
828 if (opt) {
829 opt += 13;
830 if (*opt && *opt == '=') {
831 bool val;
832
833 if (prom_strtobool(++opt, &val))
834 prom_radix_disable = false;
835 else
836 prom_radix_disable = val;
837 } else
838 prom_radix_disable = true;
839 }
840 if (prom_radix_disable)
841 prom_debug("Radix disabled from cmdline\n");
842
843 opt = prom_strstr(prom_cmd_line, "radix_hcall_invalidate=on");
844 if (opt) {
845 prom_radix_gtse_disable = true;
846 prom_debug("Radix GTSE disabled from cmdline\n");
847 }
848
849 opt = prom_strstr(prom_cmd_line, "xive=off");
850 if (opt) {
851 prom_xive_disable = true;
852 prom_debug("XIVE disabled from cmdline\n");
853 }
854#endif /* CONFIG_PPC_PSERIES */
855
856#ifdef CONFIG_PPC_SVM
857 opt = prom_strstr(prom_cmd_line, "svm=");
858 if (opt) {
859 bool val;
860
861 opt += sizeof("svm=") - 1;
862 if (!prom_strtobool(opt, &val))
863 prom_svm_enable = val;
864 }
865#endif /* CONFIG_PPC_SVM */
866}
867
868#ifdef CONFIG_PPC_PSERIES
869/*
870 * The architecture vector has an array of PVR mask/value pairs,
871 * followed by # option vectors - 1, followed by the option vectors.
872 *
873 * See prom.h for the definition of the bits specified in the
874 * architecture vector.
875 */
876
877/* Firmware expects the value to be n - 1, where n is the # of vectors */
878#define NUM_VECTORS(n) ((n) - 1)
879
880/*
881 * Firmware expects 1 + n - 2, where n is the length of the option vector in
882 * bytes. The 1 accounts for the length byte itself, the - 2 .. ?
883 */
884#define VECTOR_LENGTH(n) (1 + (n) - 2)
885
886struct option_vector1 {
887 u8 byte1;
888 u8 arch_versions;
889 u8 arch_versions3;
890} __packed;
891
892struct option_vector2 {
893 u8 byte1;
894 __be16 reserved;
895 __be32 real_base;
896 __be32 real_size;
897 __be32 virt_base;
898 __be32 virt_size;
899 __be32 load_base;
900 __be32 min_rma;
901 __be32 min_load;
902 u8 min_rma_percent;
903 u8 max_pft_size;
904} __packed;
905
906struct option_vector3 {
907 u8 byte1;
908 u8 byte2;
909} __packed;
910
911struct option_vector4 {
912 u8 byte1;
913 u8 min_vp_cap;
914} __packed;
915
916struct option_vector5 {
917 u8 byte1;
918 u8 byte2;
919 u8 byte3;
920 u8 cmo;
921 u8 associativity;
922 u8 bin_opts;
923 u8 micro_checkpoint;
924 u8 reserved0;
925 __be32 max_cpus;
926 __be16 papr_level;
927 __be16 reserved1;
928 u8 platform_facilities;
929 u8 reserved2;
930 __be16 reserved3;
931 u8 subprocessors;
932 u8 byte22;
933 u8 intarch;
934 u8 mmu;
935 u8 hash_ext;
936 u8 radix_ext;
937} __packed;
938
939struct option_vector6 {
940 u8 reserved;
941 u8 secondary_pteg;
942 u8 os_name;
943} __packed;
944
945struct option_vector7 {
946 u8 os_id[256];
947} __packed;
948
949struct ibm_arch_vec {
950 struct { __be32 mask, val; } pvrs[16];
951
952 u8 num_vectors;
953
954 u8 vec1_len;
955 struct option_vector1 vec1;
956
957 u8 vec2_len;
958 struct option_vector2 vec2;
959
960 u8 vec3_len;
961 struct option_vector3 vec3;
962
963 u8 vec4_len;
964 struct option_vector4 vec4;
965
966 u8 vec5_len;
967 struct option_vector5 vec5;
968
969 u8 vec6_len;
970 struct option_vector6 vec6;
971
972 u8 vec7_len;
973 struct option_vector7 vec7;
974} __packed;
975
976static const struct ibm_arch_vec ibm_architecture_vec_template __initconst = {
977 .pvrs = {
978 {
979 .mask = cpu_to_be32(0xfffe0000), /* POWER5/POWER5+ */
980 .val = cpu_to_be32(0x003a0000),
981 },
982 {
983 .mask = cpu_to_be32(0xffff0000), /* POWER6 */
984 .val = cpu_to_be32(0x003e0000),
985 },
986 {
987 .mask = cpu_to_be32(0xffff0000), /* POWER7 */
988 .val = cpu_to_be32(0x003f0000),
989 },
990 {
991 .mask = cpu_to_be32(0xffff0000), /* POWER8E */
992 .val = cpu_to_be32(0x004b0000),
993 },
994 {
995 .mask = cpu_to_be32(0xffff0000), /* POWER8NVL */
996 .val = cpu_to_be32(0x004c0000),
997 },
998 {
999 .mask = cpu_to_be32(0xffff0000), /* POWER8 */
1000 .val = cpu_to_be32(0x004d0000),
1001 },
1002 {
1003 .mask = cpu_to_be32(0xffff0000), /* POWER9 */
1004 .val = cpu_to_be32(0x004e0000),
1005 },
1006 {
1007 .mask = cpu_to_be32(0xffff0000), /* POWER10 */
1008 .val = cpu_to_be32(0x00800000),
1009 },
1010 {
1011 .mask = cpu_to_be32(0xffff0000), /* POWER11 */
1012 .val = cpu_to_be32(0x00820000),
1013 },
1014 {
1015 .mask = cpu_to_be32(0xffffffff), /* P11 compliant */
1016 .val = cpu_to_be32(0x0f000007),
1017 },
1018 {
1019 .mask = cpu_to_be32(0xffffffff), /* all 3.1-compliant */
1020 .val = cpu_to_be32(0x0f000006),
1021 },
1022 {
1023 .mask = cpu_to_be32(0xffffffff), /* all 3.00-compliant */
1024 .val = cpu_to_be32(0x0f000005),
1025 },
1026 {
1027 .mask = cpu_to_be32(0xffffffff), /* all 2.07-compliant */
1028 .val = cpu_to_be32(0x0f000004),
1029 },
1030 {
1031 .mask = cpu_to_be32(0xffffffff), /* all 2.06-compliant */
1032 .val = cpu_to_be32(0x0f000003),
1033 },
1034 {
1035 .mask = cpu_to_be32(0xffffffff), /* all 2.05-compliant */
1036 .val = cpu_to_be32(0x0f000002),
1037 },
1038 {
1039 .mask = cpu_to_be32(0xfffffffe), /* all 2.04-compliant and earlier */
1040 .val = cpu_to_be32(0x0f000001),
1041 },
1042 },
1043
1044 .num_vectors = NUM_VECTORS(6),
1045
1046 .vec1_len = VECTOR_LENGTH(sizeof(struct option_vector1)),
1047 .vec1 = {
1048 .byte1 = 0,
1049 .arch_versions = OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 |
1050 OV1_PPC_2_04 | OV1_PPC_2_05 | OV1_PPC_2_06 | OV1_PPC_2_07,
1051 .arch_versions3 = OV1_PPC_3_00 | OV1_PPC_3_1,
1052 },
1053
1054 .vec2_len = VECTOR_LENGTH(sizeof(struct option_vector2)),
1055 /* option vector 2: Open Firmware options supported */
1056 .vec2 = {
1057 .byte1 = OV2_REAL_MODE,
1058 .reserved = 0,
1059 .real_base = cpu_to_be32(0xffffffff),
1060 .real_size = cpu_to_be32(0xffffffff),
1061 .virt_base = cpu_to_be32(0xffffffff),
1062 .virt_size = cpu_to_be32(0xffffffff),
1063 .load_base = cpu_to_be32(0xffffffff),
1064 .min_rma = cpu_to_be32(512), /* 512MB min RMA */
1065 .min_load = cpu_to_be32(0xffffffff), /* full client load */
1066 .min_rma_percent = 0, /* min RMA percentage of total RAM */
1067 .max_pft_size = 48, /* max log_2(hash table size) */
1068 },
1069
1070 .vec3_len = VECTOR_LENGTH(sizeof(struct option_vector3)),
1071 /* option vector 3: processor options supported */
1072 .vec3 = {
1073 .byte1 = 0, /* don't ignore, don't halt */
1074 .byte2 = OV3_FP | OV3_VMX | OV3_DFP,
1075 },
1076
1077 .vec4_len = VECTOR_LENGTH(sizeof(struct option_vector4)),
1078 /* option vector 4: IBM PAPR implementation */
1079 .vec4 = {
1080 .byte1 = 0, /* don't halt */
1081 .min_vp_cap = OV4_MIN_ENT_CAP, /* minimum VP entitled capacity */
1082 },
1083
1084 .vec5_len = VECTOR_LENGTH(sizeof(struct option_vector5)),
1085 /* option vector 5: PAPR/OF options */
1086 .vec5 = {
1087 .byte1 = 0, /* don't ignore, don't halt */
1088 .byte2 = OV5_FEAT(OV5_LPAR) | OV5_FEAT(OV5_SPLPAR) | OV5_FEAT(OV5_LARGE_PAGES) |
1089 OV5_FEAT(OV5_DRCONF_MEMORY) | OV5_FEAT(OV5_DONATE_DEDICATE_CPU) |
1090#ifdef CONFIG_PCI_MSI
1091 /* PCIe/MSI support. Without MSI full PCIe is not supported */
1092 OV5_FEAT(OV5_MSI),
1093#else
1094 0,
1095#endif
1096 .byte3 = 0,
1097 .cmo =
1098#ifdef CONFIG_PPC_SMLPAR
1099 OV5_FEAT(OV5_CMO) | OV5_FEAT(OV5_XCMO),
1100#else
1101 0,
1102#endif
1103 .associativity = OV5_FEAT(OV5_FORM1_AFFINITY) | OV5_FEAT(OV5_PRRN) |
1104 OV5_FEAT(OV5_FORM2_AFFINITY),
1105 .bin_opts = OV5_FEAT(OV5_RESIZE_HPT) | OV5_FEAT(OV5_HP_EVT),
1106 .micro_checkpoint = 0,
1107 .reserved0 = 0,
1108 .max_cpus = cpu_to_be32(NR_CPUS), /* number of cores supported */
1109 .papr_level = 0,
1110 .reserved1 = 0,
1111 .platform_facilities = OV5_FEAT(OV5_PFO_HW_RNG) | OV5_FEAT(OV5_PFO_HW_ENCR) | OV5_FEAT(OV5_PFO_HW_842),
1112 .reserved2 = 0,
1113 .reserved3 = 0,
1114 .subprocessors = 1,
1115 .byte22 = OV5_FEAT(OV5_DRMEM_V2) | OV5_FEAT(OV5_DRC_INFO),
1116 .intarch = 0,
1117 .mmu = 0,
1118 .hash_ext = 0,
1119 .radix_ext = 0,
1120 },
1121
1122 /* option vector 6: IBM PAPR hints */
1123 .vec6_len = VECTOR_LENGTH(sizeof(struct option_vector6)),
1124 .vec6 = {
1125 .reserved = 0,
1126 .secondary_pteg = 0,
1127 .os_name = OV6_LINUX,
1128 },
1129
1130 /* option vector 7: OS Identification */
1131 .vec7_len = VECTOR_LENGTH(sizeof(struct option_vector7)),
1132};
1133
1134static struct ibm_arch_vec __prombss ibm_architecture_vec ____cacheline_aligned;
1135
1136/* Old method - ELF header with PT_NOTE sections only works on BE */
1137#ifdef __BIG_ENDIAN__
1138static const struct fake_elf {
1139 Elf32_Ehdr elfhdr;
1140 Elf32_Phdr phdr[2];
1141 struct chrpnote {
1142 u32 namesz;
1143 u32 descsz;
1144 u32 type;
1145 char name[8]; /* "PowerPC" */
1146 struct chrpdesc {
1147 u32 real_mode;
1148 u32 real_base;
1149 u32 real_size;
1150 u32 virt_base;
1151 u32 virt_size;
1152 u32 load_base;
1153 } chrpdesc;
1154 } chrpnote;
1155 struct rpanote {
1156 u32 namesz;
1157 u32 descsz;
1158 u32 type;
1159 char name[24]; /* "IBM,RPA-Client-Config" */
1160 struct rpadesc {
1161 u32 lpar_affinity;
1162 u32 min_rmo_size;
1163 u32 min_rmo_percent;
1164 u32 max_pft_size;
1165 u32 splpar;
1166 u32 min_load;
1167 u32 new_mem_def;
1168 u32 ignore_me;
1169 } rpadesc;
1170 } rpanote;
1171} fake_elf __initconst = {
1172 .elfhdr = {
1173 .e_ident = { 0x7f, 'E', 'L', 'F',
1174 ELFCLASS32, ELFDATA2MSB, EV_CURRENT },
1175 .e_type = ET_EXEC, /* yeah right */
1176 .e_machine = EM_PPC,
1177 .e_version = EV_CURRENT,
1178 .e_phoff = offsetof(struct fake_elf, phdr),
1179 .e_phentsize = sizeof(Elf32_Phdr),
1180 .e_phnum = 2
1181 },
1182 .phdr = {
1183 [0] = {
1184 .p_type = PT_NOTE,
1185 .p_offset = offsetof(struct fake_elf, chrpnote),
1186 .p_filesz = sizeof(struct chrpnote)
1187 }, [1] = {
1188 .p_type = PT_NOTE,
1189 .p_offset = offsetof(struct fake_elf, rpanote),
1190 .p_filesz = sizeof(struct rpanote)
1191 }
1192 },
1193 .chrpnote = {
1194 .namesz = sizeof("PowerPC"),
1195 .descsz = sizeof(struct chrpdesc),
1196 .type = 0x1275,
1197 .name = "PowerPC",
1198 .chrpdesc = {
1199 .real_mode = ~0U, /* ~0 means "don't care" */
1200 .real_base = ~0U,
1201 .real_size = ~0U,
1202 .virt_base = ~0U,
1203 .virt_size = ~0U,
1204 .load_base = ~0U
1205 },
1206 },
1207 .rpanote = {
1208 .namesz = sizeof("IBM,RPA-Client-Config"),
1209 .descsz = sizeof(struct rpadesc),
1210 .type = 0x12759999,
1211 .name = "IBM,RPA-Client-Config",
1212 .rpadesc = {
1213 .lpar_affinity = 0,
1214 .min_rmo_size = 64, /* in megabytes */
1215 .min_rmo_percent = 0,
1216 .max_pft_size = 48, /* 2^48 bytes max PFT size */
1217 .splpar = 1,
1218 .min_load = ~0U,
1219 .new_mem_def = 0
1220 }
1221 }
1222};
1223#endif /* __BIG_ENDIAN__ */
1224
1225static int __init prom_count_smt_threads(void)
1226{
1227 phandle node;
1228 char type[64];
1229 unsigned int plen;
1230
1231 /* Pick up th first CPU node we can find */
1232 for (node = 0; prom_next_node(&node); ) {
1233 type[0] = 0;
1234 prom_getprop(node, "device_type", type, sizeof(type));
1235
1236 if (prom_strcmp(type, "cpu"))
1237 continue;
1238 /*
1239 * There is an entry for each smt thread, each entry being
1240 * 4 bytes long. All cpus should have the same number of
1241 * smt threads, so return after finding the first.
1242 */
1243 plen = prom_getproplen(node, "ibm,ppc-interrupt-server#s");
1244 if (plen == PROM_ERROR)
1245 break;
1246 plen >>= 2;
1247 prom_debug("Found %lu smt threads per core\n", (unsigned long)plen);
1248
1249 /* Sanity check */
1250 if (plen < 1 || plen > 64) {
1251 prom_printf("Threads per core %lu out of bounds, assuming 1\n",
1252 (unsigned long)plen);
1253 return 1;
1254 }
1255 return plen;
1256 }
1257 prom_debug("No threads found, assuming 1 per core\n");
1258
1259 return 1;
1260
1261}
1262
1263static void __init prom_parse_mmu_model(u8 val,
1264 struct platform_support *support)
1265{
1266 switch (val) {
1267 case OV5_FEAT(OV5_MMU_DYNAMIC):
1268 case OV5_FEAT(OV5_MMU_EITHER): /* Either Available */
1269 prom_debug("MMU - either supported\n");
1270 support->radix_mmu = !prom_radix_disable;
1271 support->hash_mmu = true;
1272 break;
1273 case OV5_FEAT(OV5_MMU_RADIX): /* Only Radix */
1274 prom_debug("MMU - radix only\n");
1275 if (prom_radix_disable) {
1276 /*
1277 * If we __have__ to do radix, we're better off ignoring
1278 * the command line rather than not booting.
1279 */
1280 prom_printf("WARNING: Ignoring cmdline option disable_radix\n");
1281 }
1282 support->radix_mmu = true;
1283 break;
1284 case OV5_FEAT(OV5_MMU_HASH):
1285 prom_debug("MMU - hash only\n");
1286 support->hash_mmu = true;
1287 break;
1288 default:
1289 prom_debug("Unknown mmu support option: 0x%x\n", val);
1290 break;
1291 }
1292}
1293
1294static void __init prom_parse_xive_model(u8 val,
1295 struct platform_support *support)
1296{
1297 switch (val) {
1298 case OV5_FEAT(OV5_XIVE_EITHER): /* Either Available */
1299 prom_debug("XIVE - either mode supported\n");
1300 support->xive = !prom_xive_disable;
1301 break;
1302 case OV5_FEAT(OV5_XIVE_EXPLOIT): /* Only Exploitation mode */
1303 prom_debug("XIVE - exploitation mode supported\n");
1304 if (prom_xive_disable) {
1305 /*
1306 * If we __have__ to do XIVE, we're better off ignoring
1307 * the command line rather than not booting.
1308 */
1309 prom_printf("WARNING: Ignoring cmdline option xive=off\n");
1310 }
1311 support->xive = true;
1312 break;
1313 case OV5_FEAT(OV5_XIVE_LEGACY): /* Only Legacy mode */
1314 prom_debug("XIVE - legacy mode supported\n");
1315 break;
1316 default:
1317 prom_debug("Unknown xive support option: 0x%x\n", val);
1318 break;
1319 }
1320}
1321
1322static void __init prom_parse_platform_support(u8 index, u8 val,
1323 struct platform_support *support)
1324{
1325 switch (index) {
1326 case OV5_INDX(OV5_MMU_SUPPORT): /* MMU Model */
1327 prom_parse_mmu_model(val & OV5_FEAT(OV5_MMU_SUPPORT), support);
1328 break;
1329 case OV5_INDX(OV5_RADIX_GTSE): /* Radix Extensions */
1330 if (val & OV5_FEAT(OV5_RADIX_GTSE))
1331 support->radix_gtse = !prom_radix_gtse_disable;
1332 break;
1333 case OV5_INDX(OV5_XIVE_SUPPORT): /* Interrupt mode */
1334 prom_parse_xive_model(val & OV5_FEAT(OV5_XIVE_SUPPORT),
1335 support);
1336 break;
1337 }
1338}
1339
1340static void __init prom_check_platform_support(void)
1341{
1342 struct platform_support supported = {
1343 .hash_mmu = false,
1344 .radix_mmu = false,
1345 .radix_gtse = false,
1346 .xive = false
1347 };
1348 int prop_len = prom_getproplen(prom.chosen,
1349 "ibm,arch-vec-5-platform-support");
1350
1351 /*
1352 * First copy the architecture vec template
1353 *
1354 * use memcpy() instead of *vec = *vec_template so that GCC replaces it
1355 * by __memcpy() when KASAN is active
1356 */
1357 memcpy(&ibm_architecture_vec, &ibm_architecture_vec_template,
1358 sizeof(ibm_architecture_vec));
1359
1360 prom_strscpy_pad(ibm_architecture_vec.vec7.os_id, linux_banner, 256);
1361
1362 if (prop_len > 1) {
1363 int i;
1364 u8 vec[8];
1365 prom_debug("Found ibm,arch-vec-5-platform-support, len: %d\n",
1366 prop_len);
1367 if (prop_len > sizeof(vec))
1368 prom_printf("WARNING: ibm,arch-vec-5-platform-support longer than expected (len: %d)\n",
1369 prop_len);
1370 prom_getprop(prom.chosen, "ibm,arch-vec-5-platform-support", &vec, sizeof(vec));
1371 for (i = 0; i < prop_len; i += 2) {
1372 prom_debug("%d: index = 0x%x val = 0x%x\n", i / 2, vec[i], vec[i + 1]);
1373 prom_parse_platform_support(vec[i], vec[i + 1], &supported);
1374 }
1375 }
1376
1377 if (supported.radix_mmu && IS_ENABLED(CONFIG_PPC_RADIX_MMU)) {
1378 /* Radix preferred - Check if GTSE is also supported */
1379 prom_debug("Asking for radix\n");
1380 ibm_architecture_vec.vec5.mmu = OV5_FEAT(OV5_MMU_RADIX);
1381 if (supported.radix_gtse)
1382 ibm_architecture_vec.vec5.radix_ext =
1383 OV5_FEAT(OV5_RADIX_GTSE);
1384 else
1385 prom_debug("Radix GTSE isn't supported\n");
1386 } else if (supported.hash_mmu) {
1387 /* Default to hash mmu (if we can) */
1388 prom_debug("Asking for hash\n");
1389 ibm_architecture_vec.vec5.mmu = OV5_FEAT(OV5_MMU_HASH);
1390 } else {
1391 /* We're probably on a legacy hypervisor */
1392 prom_debug("Assuming legacy hash support\n");
1393 }
1394
1395 if (supported.xive) {
1396 prom_debug("Asking for XIVE\n");
1397 ibm_architecture_vec.vec5.intarch = OV5_FEAT(OV5_XIVE_EXPLOIT);
1398 }
1399}
1400
1401static void __init prom_send_capabilities(void)
1402{
1403 ihandle root;
1404 prom_arg_t ret;
1405 u32 cores;
1406
1407 /* Check ibm,arch-vec-5-platform-support and fixup vec5 if required */
1408 prom_check_platform_support();
1409
1410 root = call_prom("open", 1, 1, ADDR("/"));
1411 if (root != 0) {
1412 /* We need to tell the FW about the number of cores we support.
1413 *
1414 * To do that, we count the number of threads on the first core
1415 * (we assume this is the same for all cores) and use it to
1416 * divide NR_CPUS.
1417 */
1418
1419 cores = DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads());
1420 prom_printf("Max number of cores passed to firmware: %u (NR_CPUS = %d)\n",
1421 cores, NR_CPUS);
1422
1423 ibm_architecture_vec.vec5.max_cpus = cpu_to_be32(cores);
1424
1425 /* try calling the ibm,client-architecture-support method */
1426 prom_printf("Calling ibm,client-architecture-support...");
1427 if (call_prom_ret("call-method", 3, 2, &ret,
1428 ADDR("ibm,client-architecture-support"),
1429 root,
1430 ADDR(&ibm_architecture_vec)) == 0) {
1431 /* the call exists... */
1432 if (ret)
1433 prom_printf("\nWARNING: ibm,client-architecture"
1434 "-support call FAILED!\n");
1435 call_prom("close", 1, 0, root);
1436 prom_printf(" done\n");
1437 return;
1438 }
1439 call_prom("close", 1, 0, root);
1440 prom_printf(" not implemented\n");
1441 }
1442
1443#ifdef __BIG_ENDIAN__
1444 {
1445 ihandle elfloader;
1446
1447 /* no ibm,client-architecture-support call, try the old way */
1448 elfloader = call_prom("open", 1, 1,
1449 ADDR("/packages/elf-loader"));
1450 if (elfloader == 0) {
1451 prom_printf("couldn't open /packages/elf-loader\n");
1452 return;
1453 }
1454 call_prom("call-method", 3, 1, ADDR("process-elf-header"),
1455 elfloader, ADDR(&fake_elf));
1456 call_prom("close", 1, 0, elfloader);
1457 }
1458#endif /* __BIG_ENDIAN__ */
1459}
1460#endif /* CONFIG_PPC_PSERIES */
1461
1462/*
1463 * Memory allocation strategy... our layout is normally:
1464 *
1465 * at 14Mb or more we have vmlinux, then a gap and initrd. In some
1466 * rare cases, initrd might end up being before the kernel though.
1467 * We assume this won't override the final kernel at 0, we have no
1468 * provision to handle that in this version, but it should hopefully
1469 * never happen.
1470 *
1471 * alloc_top is set to the top of RMO, eventually shrink down if the
1472 * TCEs overlap
1473 *
1474 * alloc_bottom is set to the top of kernel/initrd
1475 *
1476 * from there, allocations are done this way : rtas is allocated
1477 * topmost, and the device-tree is allocated from the bottom. We try
1478 * to grow the device-tree allocation as we progress. If we can't,
1479 * then we fail, we don't currently have a facility to restart
1480 * elsewhere, but that shouldn't be necessary.
1481 *
1482 * Note that calls to reserve_mem have to be done explicitly, memory
1483 * allocated with either alloc_up or alloc_down isn't automatically
1484 * reserved.
1485 */
1486
1487
1488/*
1489 * Allocates memory in the RMO upward from the kernel/initrd
1490 *
1491 * When align is 0, this is a special case, it means to allocate in place
1492 * at the current location of alloc_bottom or fail (that is basically
1493 * extending the previous allocation). Used for the device-tree flattening
1494 */
1495static unsigned long __init alloc_up(unsigned long size, unsigned long align)
1496{
1497 unsigned long base = alloc_bottom;
1498 unsigned long addr = 0;
1499
1500 if (align)
1501 base = ALIGN(base, align);
1502 prom_debug("%s(%lx, %lx)\n", __func__, size, align);
1503 if (ram_top == 0)
1504 prom_panic("alloc_up() called with mem not initialized\n");
1505
1506 if (align)
1507 base = ALIGN(alloc_bottom, align);
1508 else
1509 base = alloc_bottom;
1510
1511 for(; (base + size) <= alloc_top;
1512 base = ALIGN(base + 0x100000, align)) {
1513 prom_debug(" trying: 0x%lx\n\r", base);
1514 addr = (unsigned long)prom_claim(base, size, 0);
1515 if (addr != PROM_ERROR && addr != 0)
1516 break;
1517 addr = 0;
1518 if (align == 0)
1519 break;
1520 }
1521 if (addr == 0)
1522 return 0;
1523 alloc_bottom = addr + size;
1524
1525 prom_debug(" -> %lx\n", addr);
1526 prom_debug(" alloc_bottom : %lx\n", alloc_bottom);
1527 prom_debug(" alloc_top : %lx\n", alloc_top);
1528 prom_debug(" alloc_top_hi : %lx\n", alloc_top_high);
1529 prom_debug(" rmo_top : %lx\n", rmo_top);
1530 prom_debug(" ram_top : %lx\n", ram_top);
1531
1532 return addr;
1533}
1534
1535/*
1536 * Allocates memory downward, either from top of RMO, or if highmem
1537 * is set, from the top of RAM. Note that this one doesn't handle
1538 * failures. It does claim memory if highmem is not set.
1539 */
1540static unsigned long __init alloc_down(unsigned long size, unsigned long align,
1541 int highmem)
1542{
1543 unsigned long base, addr = 0;
1544
1545 prom_debug("%s(%lx, %lx, %s)\n", __func__, size, align,
1546 highmem ? "(high)" : "(low)");
1547 if (ram_top == 0)
1548 prom_panic("alloc_down() called with mem not initialized\n");
1549
1550 if (highmem) {
1551 /* Carve out storage for the TCE table. */
1552 addr = ALIGN_DOWN(alloc_top_high - size, align);
1553 if (addr <= alloc_bottom)
1554 return 0;
1555 /* Will we bump into the RMO ? If yes, check out that we
1556 * didn't overlap existing allocations there, if we did,
1557 * we are dead, we must be the first in town !
1558 */
1559 if (addr < rmo_top) {
1560 /* Good, we are first */
1561 if (alloc_top == rmo_top)
1562 alloc_top = rmo_top = addr;
1563 else
1564 return 0;
1565 }
1566 alloc_top_high = addr;
1567 goto bail;
1568 }
1569
1570 base = ALIGN_DOWN(alloc_top - size, align);
1571 for (; base > alloc_bottom;
1572 base = ALIGN_DOWN(base - 0x100000, align)) {
1573 prom_debug(" trying: 0x%lx\n\r", base);
1574 addr = (unsigned long)prom_claim(base, size, 0);
1575 if (addr != PROM_ERROR && addr != 0)
1576 break;
1577 addr = 0;
1578 }
1579 if (addr == 0)
1580 return 0;
1581 alloc_top = addr;
1582
1583 bail:
1584 prom_debug(" -> %lx\n", addr);
1585 prom_debug(" alloc_bottom : %lx\n", alloc_bottom);
1586 prom_debug(" alloc_top : %lx\n", alloc_top);
1587 prom_debug(" alloc_top_hi : %lx\n", alloc_top_high);
1588 prom_debug(" rmo_top : %lx\n", rmo_top);
1589 prom_debug(" ram_top : %lx\n", ram_top);
1590
1591 return addr;
1592}
1593
1594/*
1595 * Parse a "reg" cell
1596 */
1597static unsigned long __init prom_next_cell(int s, cell_t **cellp)
1598{
1599 cell_t *p = *cellp;
1600 unsigned long r = 0;
1601
1602 /* Ignore more than 2 cells */
1603 while (s > sizeof(unsigned long) / 4) {
1604 p++;
1605 s--;
1606 }
1607 r = be32_to_cpu(*p++);
1608#ifdef CONFIG_PPC64
1609 if (s > 1) {
1610 r <<= 32;
1611 r |= be32_to_cpu(*(p++));
1612 }
1613#endif
1614 *cellp = p;
1615 return r;
1616}
1617
1618/*
1619 * Very dumb function for adding to the memory reserve list, but
1620 * we don't need anything smarter at this point
1621 *
1622 * XXX Eventually check for collisions. They should NEVER happen.
1623 * If problems seem to show up, it would be a good start to track
1624 * them down.
1625 */
1626static void __init reserve_mem(u64 base, u64 size)
1627{
1628 u64 top = base + size;
1629 unsigned long cnt = mem_reserve_cnt;
1630
1631 if (size == 0)
1632 return;
1633
1634 /* We need to always keep one empty entry so that we
1635 * have our terminator with "size" set to 0 since we are
1636 * dumb and just copy this entire array to the boot params
1637 */
1638 base = ALIGN_DOWN(base, PAGE_SIZE);
1639 top = ALIGN(top, PAGE_SIZE);
1640 size = top - base;
1641
1642 if (cnt >= (MEM_RESERVE_MAP_SIZE - 1))
1643 prom_panic("Memory reserve map exhausted !\n");
1644 mem_reserve_map[cnt].base = cpu_to_be64(base);
1645 mem_reserve_map[cnt].size = cpu_to_be64(size);
1646 mem_reserve_cnt = cnt + 1;
1647}
1648
1649/*
1650 * Initialize memory allocation mechanism, parse "memory" nodes and
1651 * obtain that way the top of memory and RMO to setup out local allocator
1652 */
1653static void __init prom_init_mem(void)
1654{
1655 phandle node;
1656 char type[64];
1657 unsigned int plen;
1658 cell_t *p, *endp;
1659 __be32 val;
1660 u32 rac, rsc;
1661
1662 /*
1663 * We iterate the memory nodes to find
1664 * 1) top of RMO (first node)
1665 * 2) top of memory
1666 */
1667 val = cpu_to_be32(2);
1668 prom_getprop(prom.root, "#address-cells", &val, sizeof(val));
1669 rac = be32_to_cpu(val);
1670 val = cpu_to_be32(1);
1671 prom_getprop(prom.root, "#size-cells", &val, sizeof(rsc));
1672 rsc = be32_to_cpu(val);
1673 prom_debug("root_addr_cells: %x\n", rac);
1674 prom_debug("root_size_cells: %x\n", rsc);
1675
1676 prom_debug("scanning memory:\n");
1677
1678 for (node = 0; prom_next_node(&node); ) {
1679 type[0] = 0;
1680 prom_getprop(node, "device_type", type, sizeof(type));
1681
1682 if (type[0] == 0) {
1683 /*
1684 * CHRP Longtrail machines have no device_type
1685 * on the memory node, so check the name instead...
1686 */
1687 prom_getprop(node, "name", type, sizeof(type));
1688 }
1689 if (prom_strcmp(type, "memory"))
1690 continue;
1691
1692 plen = prom_getprop(node, "reg", regbuf, sizeof(regbuf));
1693 if (plen > sizeof(regbuf)) {
1694 prom_printf("memory node too large for buffer !\n");
1695 plen = sizeof(regbuf);
1696 }
1697 p = regbuf;
1698 endp = p + (plen / sizeof(cell_t));
1699
1700#ifdef DEBUG_PROM
1701 memset(prom_scratch, 0, sizeof(prom_scratch));
1702 call_prom("package-to-path", 3, 1, node, prom_scratch,
1703 sizeof(prom_scratch) - 1);
1704 prom_debug(" node %s :\n", prom_scratch);
1705#endif /* DEBUG_PROM */
1706
1707 while ((endp - p) >= (rac + rsc)) {
1708 unsigned long base, size;
1709
1710 base = prom_next_cell(rac, &p);
1711 size = prom_next_cell(rsc, &p);
1712
1713 if (size == 0)
1714 continue;
1715 prom_debug(" %lx %lx\n", base, size);
1716 if (base == 0 && (of_platform & PLATFORM_LPAR))
1717 rmo_top = size;
1718 if ((base + size) > ram_top)
1719 ram_top = base + size;
1720 }
1721 }
1722
1723 alloc_bottom = PAGE_ALIGN((unsigned long)&_end + 0x4000);
1724
1725 /*
1726 * If prom_memory_limit is set we reduce the upper limits *except* for
1727 * alloc_top_high. This must be the real top of RAM so we can put
1728 * TCE's up there.
1729 */
1730
1731 alloc_top_high = ram_top;
1732
1733 if (prom_memory_limit) {
1734 if (prom_memory_limit <= alloc_bottom) {
1735 prom_printf("Ignoring mem=%lx <= alloc_bottom.\n",
1736 prom_memory_limit);
1737 prom_memory_limit = 0;
1738 } else if (prom_memory_limit >= ram_top) {
1739 prom_printf("Ignoring mem=%lx >= ram_top.\n",
1740 prom_memory_limit);
1741 prom_memory_limit = 0;
1742 } else {
1743 ram_top = prom_memory_limit;
1744 rmo_top = min(rmo_top, prom_memory_limit);
1745 }
1746 }
1747
1748 /*
1749 * Setup our top alloc point, that is top of RMO or top of
1750 * segment 0 when running non-LPAR.
1751 * Some RS64 machines have buggy firmware where claims up at
1752 * 1GB fail. Cap at 768MB as a workaround.
1753 * Since 768MB is plenty of room, and we need to cap to something
1754 * reasonable on 32-bit, cap at 768MB on all machines.
1755 */
1756 if (!rmo_top)
1757 rmo_top = ram_top;
1758 rmo_top = min(0x30000000ul, rmo_top);
1759 alloc_top = rmo_top;
1760 alloc_top_high = ram_top;
1761
1762 /*
1763 * Check if we have an initrd after the kernel but still inside
1764 * the RMO. If we do move our bottom point to after it.
1765 */
1766 if (prom_initrd_start &&
1767 prom_initrd_start < rmo_top &&
1768 prom_initrd_end > alloc_bottom)
1769 alloc_bottom = PAGE_ALIGN(prom_initrd_end);
1770
1771 prom_printf("memory layout at init:\n");
1772 prom_printf(" memory_limit : %lx (16 MB aligned)\n",
1773 prom_memory_limit);
1774 prom_printf(" alloc_bottom : %lx\n", alloc_bottom);
1775 prom_printf(" alloc_top : %lx\n", alloc_top);
1776 prom_printf(" alloc_top_hi : %lx\n", alloc_top_high);
1777 prom_printf(" rmo_top : %lx\n", rmo_top);
1778 prom_printf(" ram_top : %lx\n", ram_top);
1779}
1780
1781static void __init prom_close_stdin(void)
1782{
1783 __be32 val;
1784 ihandle stdin;
1785
1786 if (prom_getprop(prom.chosen, "stdin", &val, sizeof(val)) > 0) {
1787 stdin = be32_to_cpu(val);
1788 call_prom("close", 1, 0, stdin);
1789 }
1790}
1791
1792#ifdef CONFIG_PPC_SVM
1793static int __init prom_rtas_hcall(uint64_t args)
1794{
1795 register uint64_t arg1 asm("r3") = H_RTAS;
1796 register uint64_t arg2 asm("r4") = args;
1797
1798 asm volatile("sc 1\n" : "=r" (arg1) :
1799 "r" (arg1),
1800 "r" (arg2) :);
1801 srr_regs_clobbered();
1802
1803 return arg1;
1804}
1805
1806static struct rtas_args __prombss os_term_args;
1807
1808static void __init prom_rtas_os_term(char *str)
1809{
1810 phandle rtas_node;
1811 __be32 val;
1812 u32 token;
1813
1814 prom_debug("%s: start...\n", __func__);
1815 rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
1816 prom_debug("rtas_node: %x\n", rtas_node);
1817 if (!PHANDLE_VALID(rtas_node))
1818 return;
1819
1820 val = 0;
1821 prom_getprop(rtas_node, "ibm,os-term", &val, sizeof(val));
1822 token = be32_to_cpu(val);
1823 prom_debug("ibm,os-term: %x\n", token);
1824 if (token == 0)
1825 prom_panic("Could not get token for ibm,os-term\n");
1826 os_term_args.token = cpu_to_be32(token);
1827 os_term_args.nargs = cpu_to_be32(1);
1828 os_term_args.nret = cpu_to_be32(1);
1829 os_term_args.args[0] = cpu_to_be32(__pa(str));
1830 prom_rtas_hcall((uint64_t)&os_term_args);
1831}
1832#endif /* CONFIG_PPC_SVM */
1833
1834/*
1835 * Allocate room for and instantiate RTAS
1836 */
1837static void __init prom_instantiate_rtas(void)
1838{
1839 phandle rtas_node;
1840 ihandle rtas_inst;
1841 u32 base, entry = 0;
1842 __be32 val;
1843 u32 size = 0;
1844
1845 prom_debug("prom_instantiate_rtas: start...\n");
1846
1847 rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
1848 prom_debug("rtas_node: %x\n", rtas_node);
1849 if (!PHANDLE_VALID(rtas_node))
1850 return;
1851
1852 val = 0;
1853 prom_getprop(rtas_node, "rtas-size", &val, sizeof(size));
1854 size = be32_to_cpu(val);
1855 if (size == 0)
1856 return;
1857
1858 base = alloc_down(size, PAGE_SIZE, 0);
1859 if (base == 0)
1860 prom_panic("Could not allocate memory for RTAS\n");
1861
1862 rtas_inst = call_prom("open", 1, 1, ADDR("/rtas"));
1863 if (!IHANDLE_VALID(rtas_inst)) {
1864 prom_printf("opening rtas package failed (%x)\n", rtas_inst);
1865 return;
1866 }
1867
1868 prom_printf("instantiating rtas at 0x%x...", base);
1869
1870 if (call_prom_ret("call-method", 3, 2, &entry,
1871 ADDR("instantiate-rtas"),
1872 rtas_inst, base) != 0
1873 || entry == 0) {
1874 prom_printf(" failed\n");
1875 return;
1876 }
1877 prom_printf(" done\n");
1878
1879 reserve_mem(base, size);
1880
1881 val = cpu_to_be32(base);
1882 prom_setprop(rtas_node, "/rtas", "linux,rtas-base",
1883 &val, sizeof(val));
1884 val = cpu_to_be32(entry);
1885 prom_setprop(rtas_node, "/rtas", "linux,rtas-entry",
1886 &val, sizeof(val));
1887
1888 /* Check if it supports "query-cpu-stopped-state" */
1889 if (prom_getprop(rtas_node, "query-cpu-stopped-state",
1890 &val, sizeof(val)) != PROM_ERROR)
1891 rtas_has_query_cpu_stopped = true;
1892
1893 prom_debug("rtas base = 0x%x\n", base);
1894 prom_debug("rtas entry = 0x%x\n", entry);
1895 prom_debug("rtas size = 0x%x\n", size);
1896
1897 prom_debug("prom_instantiate_rtas: end...\n");
1898}
1899
1900#ifdef CONFIG_PPC64
1901/*
1902 * Allocate room for and instantiate Stored Measurement Log (SML)
1903 */
1904static void __init prom_instantiate_sml(void)
1905{
1906 phandle ibmvtpm_node;
1907 ihandle ibmvtpm_inst;
1908 u32 entry = 0, size = 0, succ = 0;
1909 u64 base;
1910 __be32 val;
1911
1912 prom_debug("prom_instantiate_sml: start...\n");
1913
1914 ibmvtpm_node = call_prom("finddevice", 1, 1, ADDR("/vdevice/vtpm"));
1915 prom_debug("ibmvtpm_node: %x\n", ibmvtpm_node);
1916 if (!PHANDLE_VALID(ibmvtpm_node))
1917 return;
1918
1919 ibmvtpm_inst = call_prom("open", 1, 1, ADDR("/vdevice/vtpm"));
1920 if (!IHANDLE_VALID(ibmvtpm_inst)) {
1921 prom_printf("opening vtpm package failed (%x)\n", ibmvtpm_inst);
1922 return;
1923 }
1924
1925 if (prom_getprop(ibmvtpm_node, "ibm,sml-efi-reformat-supported",
1926 &val, sizeof(val)) != PROM_ERROR) {
1927 if (call_prom_ret("call-method", 2, 2, &succ,
1928 ADDR("reformat-sml-to-efi-alignment"),
1929 ibmvtpm_inst) != 0 || succ == 0) {
1930 prom_printf("Reformat SML to EFI alignment failed\n");
1931 return;
1932 }
1933
1934 if (call_prom_ret("call-method", 2, 2, &size,
1935 ADDR("sml-get-allocated-size"),
1936 ibmvtpm_inst) != 0 || size == 0) {
1937 prom_printf("SML get allocated size failed\n");
1938 return;
1939 }
1940 } else {
1941 if (call_prom_ret("call-method", 2, 2, &size,
1942 ADDR("sml-get-handover-size"),
1943 ibmvtpm_inst) != 0 || size == 0) {
1944 prom_printf("SML get handover size failed\n");
1945 return;
1946 }
1947 }
1948
1949 base = alloc_down(size, PAGE_SIZE, 0);
1950 if (base == 0)
1951 prom_panic("Could not allocate memory for sml\n");
1952
1953 prom_printf("instantiating sml at 0x%llx...", base);
1954
1955 memset((void *)base, 0, size);
1956
1957 if (call_prom_ret("call-method", 4, 2, &entry,
1958 ADDR("sml-handover"),
1959 ibmvtpm_inst, size, base) != 0 || entry == 0) {
1960 prom_printf("SML handover failed\n");
1961 return;
1962 }
1963 prom_printf(" done\n");
1964
1965 reserve_mem(base, size);
1966
1967 prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-base",
1968 &base, sizeof(base));
1969 prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-size",
1970 &size, sizeof(size));
1971
1972 prom_debug("sml base = 0x%llx\n", base);
1973 prom_debug("sml size = 0x%x\n", size);
1974
1975 prom_debug("prom_instantiate_sml: end...\n");
1976}
1977
1978/*
1979 * Allocate room for and initialize TCE tables
1980 */
1981#ifdef __BIG_ENDIAN__
1982static void __init prom_initialize_tce_table(void)
1983{
1984 phandle node;
1985 ihandle phb_node;
1986 char compatible[64], type[64], model[64];
1987 char *path = prom_scratch;
1988 u64 base, align;
1989 u32 minalign, minsize;
1990 u64 tce_entry, *tce_entryp;
1991 u64 local_alloc_top, local_alloc_bottom;
1992 u64 i;
1993
1994 if (prom_iommu_off)
1995 return;
1996
1997 prom_debug("starting prom_initialize_tce_table\n");
1998
1999 /* Cache current top of allocs so we reserve a single block */
2000 local_alloc_top = alloc_top_high;
2001 local_alloc_bottom = local_alloc_top;
2002
2003 /* Search all nodes looking for PHBs. */
2004 for (node = 0; prom_next_node(&node); ) {
2005 compatible[0] = 0;
2006 type[0] = 0;
2007 model[0] = 0;
2008 prom_getprop(node, "compatible",
2009 compatible, sizeof(compatible));
2010 prom_getprop(node, "device_type", type, sizeof(type));
2011 prom_getprop(node, "model", model, sizeof(model));
2012
2013 if ((type[0] == 0) || (prom_strstr(type, "pci") == NULL))
2014 continue;
2015
2016 /* Keep the old logic intact to avoid regression. */
2017 if (compatible[0] != 0) {
2018 if ((prom_strstr(compatible, "python") == NULL) &&
2019 (prom_strstr(compatible, "Speedwagon") == NULL) &&
2020 (prom_strstr(compatible, "Winnipeg") == NULL))
2021 continue;
2022 } else if (model[0] != 0) {
2023 if ((prom_strstr(model, "ython") == NULL) &&
2024 (prom_strstr(model, "peedwagon") == NULL) &&
2025 (prom_strstr(model, "innipeg") == NULL))
2026 continue;
2027 }
2028
2029 if (prom_getprop(node, "tce-table-minalign", &minalign,
2030 sizeof(minalign)) == PROM_ERROR)
2031 minalign = 0;
2032 if (prom_getprop(node, "tce-table-minsize", &minsize,
2033 sizeof(minsize)) == PROM_ERROR)
2034 minsize = 4UL << 20;
2035
2036 /*
2037 * Even though we read what OF wants, we just set the table
2038 * size to 4 MB. This is enough to map 2GB of PCI DMA space.
2039 * By doing this, we avoid the pitfalls of trying to DMA to
2040 * MMIO space and the DMA alias hole.
2041 */
2042 minsize = 4UL << 20;
2043
2044 /* Align to the greater of the align or size */
2045 align = max(minalign, minsize);
2046 base = alloc_down(minsize, align, 1);
2047 if (base == 0)
2048 prom_panic("ERROR, cannot find space for TCE table.\n");
2049 if (base < local_alloc_bottom)
2050 local_alloc_bottom = base;
2051
2052 /* It seems OF doesn't null-terminate the path :-( */
2053 memset(path, 0, sizeof(prom_scratch));
2054 /* Call OF to setup the TCE hardware */
2055 if (call_prom("package-to-path", 3, 1, node,
2056 path, sizeof(prom_scratch) - 1) == PROM_ERROR) {
2057 prom_printf("package-to-path failed\n");
2058 }
2059
2060 /* Save away the TCE table attributes for later use. */
2061 prom_setprop(node, path, "linux,tce-base", &base, sizeof(base));
2062 prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize));
2063
2064 prom_debug("TCE table: %s\n", path);
2065 prom_debug("\tnode = 0x%x\n", node);
2066 prom_debug("\tbase = 0x%llx\n", base);
2067 prom_debug("\tsize = 0x%x\n", minsize);
2068
2069 /* Initialize the table to have a one-to-one mapping
2070 * over the allocated size.
2071 */
2072 tce_entryp = (u64 *)base;
2073 for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) {
2074 tce_entry = (i << PAGE_SHIFT);
2075 tce_entry |= 0x3;
2076 *tce_entryp = tce_entry;
2077 }
2078
2079 prom_printf("opening PHB %s", path);
2080 phb_node = call_prom("open", 1, 1, path);
2081 if (phb_node == 0)
2082 prom_printf("... failed\n");
2083 else
2084 prom_printf("... done\n");
2085
2086 call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"),
2087 phb_node, -1, minsize,
2088 (u32) base, (u32) (base >> 32));
2089 call_prom("close", 1, 0, phb_node);
2090 }
2091
2092 reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom);
2093
2094 /* These are only really needed if there is a memory limit in
2095 * effect, but we don't know so export them always. */
2096 prom_tce_alloc_start = local_alloc_bottom;
2097 prom_tce_alloc_end = local_alloc_top;
2098
2099 /* Flag the first invalid entry */
2100 prom_debug("ending prom_initialize_tce_table\n");
2101}
2102#endif /* __BIG_ENDIAN__ */
2103#endif /* CONFIG_PPC64 */
2104
2105/*
2106 * With CHRP SMP we need to use the OF to start the other processors.
2107 * We can't wait until smp_boot_cpus (the OF is trashed by then)
2108 * so we have to put the processors into a holding pattern controlled
2109 * by the kernel (not OF) before we destroy the OF.
2110 *
2111 * This uses a chunk of low memory, puts some holding pattern
2112 * code there and sends the other processors off to there until
2113 * smp_boot_cpus tells them to do something. The holding pattern
2114 * checks that address until its cpu # is there, when it is that
2115 * cpu jumps to __secondary_start(). smp_boot_cpus() takes care
2116 * of setting those values.
2117 *
2118 * We also use physical address 0x4 here to tell when a cpu
2119 * is in its holding pattern code.
2120 *
2121 * -- Cort
2122 */
2123/*
2124 * We want to reference the copy of __secondary_hold_* in the
2125 * 0 - 0x100 address range
2126 */
2127#define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff)
2128
2129static void __init prom_hold_cpus(void)
2130{
2131 unsigned long i;
2132 phandle node;
2133 char type[64];
2134 unsigned long *spinloop
2135 = (void *) LOW_ADDR(__secondary_hold_spinloop);
2136 unsigned long *acknowledge
2137 = (void *) LOW_ADDR(__secondary_hold_acknowledge);
2138 unsigned long secondary_hold = LOW_ADDR(__secondary_hold);
2139
2140 /*
2141 * On pseries, if RTAS supports "query-cpu-stopped-state",
2142 * we skip this stage, the CPUs will be started by the
2143 * kernel using RTAS.
2144 */
2145 if ((of_platform == PLATFORM_PSERIES ||
2146 of_platform == PLATFORM_PSERIES_LPAR) &&
2147 rtas_has_query_cpu_stopped) {
2148 prom_printf("prom_hold_cpus: skipped\n");
2149 return;
2150 }
2151
2152 prom_debug("prom_hold_cpus: start...\n");
2153 prom_debug(" 1) spinloop = 0x%lx\n", (unsigned long)spinloop);
2154 prom_debug(" 1) *spinloop = 0x%lx\n", *spinloop);
2155 prom_debug(" 1) acknowledge = 0x%lx\n",
2156 (unsigned long)acknowledge);
2157 prom_debug(" 1) *acknowledge = 0x%lx\n", *acknowledge);
2158 prom_debug(" 1) secondary_hold = 0x%lx\n", secondary_hold);
2159
2160 /* Set the common spinloop variable, so all of the secondary cpus
2161 * will block when they are awakened from their OF spinloop.
2162 * This must occur for both SMP and non SMP kernels, since OF will
2163 * be trashed when we move the kernel.
2164 */
2165 *spinloop = 0;
2166
2167 /* look for cpus */
2168 for (node = 0; prom_next_node(&node); ) {
2169 unsigned int cpu_no;
2170 __be32 reg;
2171
2172 type[0] = 0;
2173 prom_getprop(node, "device_type", type, sizeof(type));
2174 if (prom_strcmp(type, "cpu") != 0)
2175 continue;
2176
2177 /* Skip non-configured cpus. */
2178 if (prom_getprop(node, "status", type, sizeof(type)) > 0)
2179 if (prom_strcmp(type, "okay") != 0)
2180 continue;
2181
2182 reg = cpu_to_be32(-1); /* make sparse happy */
2183 prom_getprop(node, "reg", ®, sizeof(reg));
2184 cpu_no = be32_to_cpu(reg);
2185
2186 prom_debug("cpu hw idx = %u\n", cpu_no);
2187
2188 /* Init the acknowledge var which will be reset by
2189 * the secondary cpu when it awakens from its OF
2190 * spinloop.
2191 */
2192 *acknowledge = (unsigned long)-1;
2193
2194 if (cpu_no != prom.cpu) {
2195 /* Primary Thread of non-boot cpu or any thread */
2196 prom_printf("starting cpu hw idx %u... ", cpu_no);
2197 call_prom("start-cpu", 3, 0, node,
2198 secondary_hold, cpu_no);
2199
2200 for (i = 0; (i < 100000000) &&
2201 (*acknowledge == ((unsigned long)-1)); i++ )
2202 mb();
2203
2204 if (*acknowledge == cpu_no)
2205 prom_printf("done\n");
2206 else
2207 prom_printf("failed: %lx\n", *acknowledge);
2208 }
2209#ifdef CONFIG_SMP
2210 else
2211 prom_printf("boot cpu hw idx %u\n", cpu_no);
2212#endif /* CONFIG_SMP */
2213 }
2214
2215 prom_debug("prom_hold_cpus: end...\n");
2216}
2217
2218
2219static void __init prom_init_client_services(unsigned long pp)
2220{
2221 /* Get a handle to the prom entry point before anything else */
2222 prom_entry = pp;
2223
2224 /* get a handle for the stdout device */
2225 prom.chosen = call_prom("finddevice", 1, 1, ADDR("/chosen"));
2226 if (!PHANDLE_VALID(prom.chosen))
2227 prom_panic("cannot find chosen"); /* msg won't be printed :( */
2228
2229 /* get device tree root */
2230 prom.root = call_prom("finddevice", 1, 1, ADDR("/"));
2231 if (!PHANDLE_VALID(prom.root))
2232 prom_panic("cannot find device tree root"); /* msg won't be printed :( */
2233
2234 prom.mmumap = 0;
2235}
2236
2237#ifdef CONFIG_PPC32
2238/*
2239 * For really old powermacs, we need to map things we claim.
2240 * For that, we need the ihandle of the mmu.
2241 * Also, on the longtrail, we need to work around other bugs.
2242 */
2243static void __init prom_find_mmu(void)
2244{
2245 phandle oprom;
2246 char version[64];
2247
2248 oprom = call_prom("finddevice", 1, 1, ADDR("/openprom"));
2249 if (!PHANDLE_VALID(oprom))
2250 return;
2251 if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0)
2252 return;
2253 version[sizeof(version) - 1] = 0;
2254 /* XXX might need to add other versions here */
2255 if (prom_strcmp(version, "Open Firmware, 1.0.5") == 0)
2256 of_workarounds = OF_WA_CLAIM;
2257 else if (prom_strncmp(version, "FirmWorks,3.", 12) == 0) {
2258 of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL;
2259 call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim");
2260 } else
2261 return;
2262 prom.memory = call_prom("open", 1, 1, ADDR("/memory"));
2263 prom_getprop(prom.chosen, "mmu", &prom.mmumap,
2264 sizeof(prom.mmumap));
2265 prom.mmumap = be32_to_cpu(prom.mmumap);
2266 if (!IHANDLE_VALID(prom.memory) || !IHANDLE_VALID(prom.mmumap))
2267 of_workarounds &= ~OF_WA_CLAIM; /* hmmm */
2268}
2269#else
2270#define prom_find_mmu()
2271#endif
2272
2273static void __init prom_init_stdout(void)
2274{
2275 char *path = of_stdout_device;
2276 char type[16];
2277 phandle stdout_node;
2278 __be32 val;
2279
2280 if (prom_getprop(prom.chosen, "stdout", &val, sizeof(val)) <= 0)
2281 prom_panic("cannot find stdout");
2282
2283 prom.stdout = be32_to_cpu(val);
2284
2285 /* Get the full OF pathname of the stdout device */
2286 memset(path, 0, 256);
2287 call_prom("instance-to-path", 3, 1, prom.stdout, path, 255);
2288 prom_printf("OF stdout device is: %s\n", of_stdout_device);
2289 prom_setprop(prom.chosen, "/chosen", "linux,stdout-path",
2290 path, prom_strlen(path) + 1);
2291
2292 /* instance-to-package fails on PA-Semi */
2293 stdout_node = call_prom("instance-to-package", 1, 1, prom.stdout);
2294 if (stdout_node != PROM_ERROR) {
2295 val = cpu_to_be32(stdout_node);
2296
2297 /* If it's a display, note it */
2298 memset(type, 0, sizeof(type));
2299 prom_getprop(stdout_node, "device_type", type, sizeof(type));
2300 if (prom_strcmp(type, "display") == 0)
2301 prom_setprop(stdout_node, path, "linux,boot-display", NULL, 0);
2302 }
2303}
2304
2305static int __init prom_find_machine_type(void)
2306{
2307 static char compat[256] __prombss;
2308 int len, i = 0;
2309#ifdef CONFIG_PPC64
2310 phandle rtas;
2311 int x;
2312#endif
2313
2314 /* Look for a PowerMac or a Cell */
2315 len = prom_getprop(prom.root, "compatible",
2316 compat, sizeof(compat)-1);
2317 if (len > 0) {
2318 compat[len] = 0;
2319 while (i < len) {
2320 char *p = &compat[i];
2321 int sl = prom_strlen(p);
2322 if (sl == 0)
2323 break;
2324 if (prom_strstr(p, "Power Macintosh") ||
2325 prom_strstr(p, "MacRISC"))
2326 return PLATFORM_POWERMAC;
2327#ifdef CONFIG_PPC64
2328 /* We must make sure we don't detect the IBM Cell
2329 * blades as pSeries due to some firmware issues,
2330 * so we do it here.
2331 */
2332 if (prom_strstr(p, "IBM,CBEA") ||
2333 prom_strstr(p, "IBM,CPBW-1.0"))
2334 return PLATFORM_GENERIC;
2335#endif /* CONFIG_PPC64 */
2336 i += sl + 1;
2337 }
2338 }
2339#ifdef CONFIG_PPC64
2340 /* Try to figure out if it's an IBM pSeries or any other
2341 * PAPR compliant platform. We assume it is if :
2342 * - /device_type is "chrp" (please, do NOT use that for future
2343 * non-IBM designs !
2344 * - it has /rtas
2345 */
2346 len = prom_getprop(prom.root, "device_type",
2347 compat, sizeof(compat)-1);
2348 if (len <= 0)
2349 return PLATFORM_GENERIC;
2350 if (prom_strcmp(compat, "chrp"))
2351 return PLATFORM_GENERIC;
2352
2353 /* Default to pSeries. We need to know if we are running LPAR */
2354 rtas = call_prom("finddevice", 1, 1, ADDR("/rtas"));
2355 if (!PHANDLE_VALID(rtas))
2356 return PLATFORM_GENERIC;
2357 x = prom_getproplen(rtas, "ibm,hypertas-functions");
2358 if (x != PROM_ERROR) {
2359 prom_debug("Hypertas detected, assuming LPAR !\n");
2360 return PLATFORM_PSERIES_LPAR;
2361 }
2362 return PLATFORM_PSERIES;
2363#else
2364 return PLATFORM_GENERIC;
2365#endif
2366}
2367
2368static int __init prom_set_color(ihandle ih, int i, int r, int g, int b)
2369{
2370 return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r);
2371}
2372
2373/*
2374 * If we have a display that we don't know how to drive,
2375 * we will want to try to execute OF's open method for it
2376 * later. However, OF will probably fall over if we do that
2377 * we've taken over the MMU.
2378 * So we check whether we will need to open the display,
2379 * and if so, open it now.
2380 */
2381static void __init prom_check_displays(void)
2382{
2383 char type[16], *path;
2384 phandle node;
2385 ihandle ih;
2386 int i;
2387
2388 static const unsigned char default_colors[] __initconst = {
2389 0x00, 0x00, 0x00,
2390 0x00, 0x00, 0xaa,
2391 0x00, 0xaa, 0x00,
2392 0x00, 0xaa, 0xaa,
2393 0xaa, 0x00, 0x00,
2394 0xaa, 0x00, 0xaa,
2395 0xaa, 0xaa, 0x00,
2396 0xaa, 0xaa, 0xaa,
2397 0x55, 0x55, 0x55,
2398 0x55, 0x55, 0xff,
2399 0x55, 0xff, 0x55,
2400 0x55, 0xff, 0xff,
2401 0xff, 0x55, 0x55,
2402 0xff, 0x55, 0xff,
2403 0xff, 0xff, 0x55,
2404 0xff, 0xff, 0xff
2405 };
2406 const unsigned char *clut;
2407
2408 prom_debug("Looking for displays\n");
2409 for (node = 0; prom_next_node(&node); ) {
2410 memset(type, 0, sizeof(type));
2411 prom_getprop(node, "device_type", type, sizeof(type));
2412 if (prom_strcmp(type, "display") != 0)
2413 continue;
2414
2415 /* It seems OF doesn't null-terminate the path :-( */
2416 path = prom_scratch;
2417 memset(path, 0, sizeof(prom_scratch));
2418
2419 /*
2420 * leave some room at the end of the path for appending extra
2421 * arguments
2422 */
2423 if (call_prom("package-to-path", 3, 1, node, path,
2424 sizeof(prom_scratch) - 10) == PROM_ERROR)
2425 continue;
2426 prom_printf("found display : %s, opening... ", path);
2427
2428 ih = call_prom("open", 1, 1, path);
2429 if (ih == 0) {
2430 prom_printf("failed\n");
2431 continue;
2432 }
2433
2434 /* Success */
2435 prom_printf("done\n");
2436 prom_setprop(node, path, "linux,opened", NULL, 0);
2437
2438 /* Setup a usable color table when the appropriate
2439 * method is available. Should update this to set-colors */
2440 clut = default_colors;
2441 for (i = 0; i < 16; i++, clut += 3)
2442 if (prom_set_color(ih, i, clut[0], clut[1],
2443 clut[2]) != 0)
2444 break;
2445
2446#ifdef CONFIG_LOGO_LINUX_CLUT224
2447 clut = PTRRELOC(logo_linux_clut224.clut);
2448 for (i = 0; i < logo_linux_clut224.clutsize; i++, clut += 3)
2449 if (prom_set_color(ih, i + 32, clut[0], clut[1],
2450 clut[2]) != 0)
2451 break;
2452#endif /* CONFIG_LOGO_LINUX_CLUT224 */
2453
2454#ifdef CONFIG_PPC_EARLY_DEBUG_BOOTX
2455 if (prom_getprop(node, "linux,boot-display", NULL, 0) !=
2456 PROM_ERROR) {
2457 u32 width, height, pitch, addr;
2458
2459 prom_printf("Setting btext !\n");
2460
2461 if (prom_getprop(node, "width", &width, 4) == PROM_ERROR)
2462 return;
2463
2464 if (prom_getprop(node, "height", &height, 4) == PROM_ERROR)
2465 return;
2466
2467 if (prom_getprop(node, "linebytes", &pitch, 4) == PROM_ERROR)
2468 return;
2469
2470 if (prom_getprop(node, "address", &addr, 4) == PROM_ERROR)
2471 return;
2472
2473 prom_printf("W=%d H=%d LB=%d addr=0x%x\n",
2474 width, height, pitch, addr);
2475 btext_setup_display(width, height, 8, pitch, addr);
2476 btext_prepare_BAT();
2477 }
2478#endif /* CONFIG_PPC_EARLY_DEBUG_BOOTX */
2479 }
2480}
2481
2482
2483/* Return (relocated) pointer to this much memory: moves initrd if reqd. */
2484static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end,
2485 unsigned long needed, unsigned long align)
2486{
2487 void *ret;
2488
2489 *mem_start = ALIGN(*mem_start, align);
2490 while ((*mem_start + needed) > *mem_end) {
2491 unsigned long room, chunk;
2492
2493 prom_debug("Chunk exhausted, claiming more at %lx...\n",
2494 alloc_bottom);
2495 room = alloc_top - alloc_bottom;
2496 if (room > DEVTREE_CHUNK_SIZE)
2497 room = DEVTREE_CHUNK_SIZE;
2498 if (room < PAGE_SIZE)
2499 prom_panic("No memory for flatten_device_tree "
2500 "(no room)\n");
2501 chunk = alloc_up(room, 0);
2502 if (chunk == 0)
2503 prom_panic("No memory for flatten_device_tree "
2504 "(claim failed)\n");
2505 *mem_end = chunk + room;
2506 }
2507
2508 ret = (void *)*mem_start;
2509 *mem_start += needed;
2510
2511 return ret;
2512}
2513
2514#define dt_push_token(token, mem_start, mem_end) do { \
2515 void *room = make_room(mem_start, mem_end, 4, 4); \
2516 *(__be32 *)room = cpu_to_be32(token); \
2517 } while(0)
2518
2519static unsigned long __init dt_find_string(char *str)
2520{
2521 char *s, *os;
2522
2523 s = os = (char *)dt_string_start;
2524 s += 4;
2525 while (s < (char *)dt_string_end) {
2526 if (prom_strcmp(s, str) == 0)
2527 return s - os;
2528 s += prom_strlen(s) + 1;
2529 }
2530 return 0;
2531}
2532
2533/*
2534 * The Open Firmware 1275 specification states properties must be 31 bytes or
2535 * less, however not all firmwares obey this. Make it 64 bytes to be safe.
2536 */
2537#define MAX_PROPERTY_NAME 64
2538
2539static void __init scan_dt_build_strings(phandle node,
2540 unsigned long *mem_start,
2541 unsigned long *mem_end)
2542{
2543 char *prev_name, *namep, *sstart;
2544 unsigned long soff;
2545 phandle child;
2546
2547 sstart = (char *)dt_string_start;
2548
2549 /* get and store all property names */
2550 prev_name = "";
2551 for (;;) {
2552 /* 64 is max len of name including nul. */
2553 namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1);
2554 if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) {
2555 /* No more nodes: unwind alloc */
2556 *mem_start = (unsigned long)namep;
2557 break;
2558 }
2559
2560 /* skip "name" */
2561 if (prom_strcmp(namep, "name") == 0) {
2562 *mem_start = (unsigned long)namep;
2563 prev_name = "name";
2564 continue;
2565 }
2566 /* get/create string entry */
2567 soff = dt_find_string(namep);
2568 if (soff != 0) {
2569 *mem_start = (unsigned long)namep;
2570 namep = sstart + soff;
2571 } else {
2572 /* Trim off some if we can */
2573 *mem_start = (unsigned long)namep + prom_strlen(namep) + 1;
2574 dt_string_end = *mem_start;
2575 }
2576 prev_name = namep;
2577 }
2578
2579 /* do all our children */
2580 child = call_prom("child", 1, 1, node);
2581 while (child != 0) {
2582 scan_dt_build_strings(child, mem_start, mem_end);
2583 child = call_prom("peer", 1, 1, child);
2584 }
2585}
2586
2587static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
2588 unsigned long *mem_end)
2589{
2590 phandle child;
2591 char *namep, *prev_name, *sstart, *p, *ep, *lp, *path;
2592 unsigned long soff;
2593 unsigned char *valp;
2594 static char pname[MAX_PROPERTY_NAME] __prombss;
2595 int l, room, has_phandle = 0;
2596
2597 dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end);
2598
2599 /* get the node's full name */
2600 namep = (char *)*mem_start;
2601 room = *mem_end - *mem_start;
2602 if (room > 255)
2603 room = 255;
2604 l = call_prom("package-to-path", 3, 1, node, namep, room);
2605 if (l >= 0) {
2606 /* Didn't fit? Get more room. */
2607 if (l >= room) {
2608 if (l >= *mem_end - *mem_start)
2609 namep = make_room(mem_start, mem_end, l+1, 1);
2610 call_prom("package-to-path", 3, 1, node, namep, l);
2611 }
2612 namep[l] = '\0';
2613
2614 /* Fixup an Apple bug where they have bogus \0 chars in the
2615 * middle of the path in some properties, and extract
2616 * the unit name (everything after the last '/').
2617 */
2618 for (lp = p = namep, ep = namep + l; p < ep; p++) {
2619 if (*p == '/')
2620 lp = namep;
2621 else if (*p != 0)
2622 *lp++ = *p;
2623 }
2624 *lp = 0;
2625 *mem_start = ALIGN((unsigned long)lp + 1, 4);
2626 }
2627
2628 /* get it again for debugging */
2629 path = prom_scratch;
2630 memset(path, 0, sizeof(prom_scratch));
2631 call_prom("package-to-path", 3, 1, node, path, sizeof(prom_scratch) - 1);
2632
2633 /* get and store all properties */
2634 prev_name = "";
2635 sstart = (char *)dt_string_start;
2636 for (;;) {
2637 if (call_prom("nextprop", 3, 1, node, prev_name,
2638 pname) != 1)
2639 break;
2640
2641 /* skip "name" */
2642 if (prom_strcmp(pname, "name") == 0) {
2643 prev_name = "name";
2644 continue;
2645 }
2646
2647 /* find string offset */
2648 soff = dt_find_string(pname);
2649 if (soff == 0) {
2650 prom_printf("WARNING: Can't find string index for"
2651 " <%s>, node %s\n", pname, path);
2652 break;
2653 }
2654 prev_name = sstart + soff;
2655
2656 /* get length */
2657 l = call_prom("getproplen", 2, 1, node, pname);
2658
2659 /* sanity checks */
2660 if (l == PROM_ERROR)
2661 continue;
2662
2663 /* push property head */
2664 dt_push_token(OF_DT_PROP, mem_start, mem_end);
2665 dt_push_token(l, mem_start, mem_end);
2666 dt_push_token(soff, mem_start, mem_end);
2667
2668 /* push property content */
2669 valp = make_room(mem_start, mem_end, l, 4);
2670 call_prom("getprop", 4, 1, node, pname, valp, l);
2671 *mem_start = ALIGN(*mem_start, 4);
2672
2673 if (!prom_strcmp(pname, "phandle"))
2674 has_phandle = 1;
2675 }
2676
2677 /* Add a "phandle" property if none already exist */
2678 if (!has_phandle) {
2679 soff = dt_find_string("phandle");
2680 if (soff == 0)
2681 prom_printf("WARNING: Can't find string index for <phandle> node %s\n", path);
2682 else {
2683 dt_push_token(OF_DT_PROP, mem_start, mem_end);
2684 dt_push_token(4, mem_start, mem_end);
2685 dt_push_token(soff, mem_start, mem_end);
2686 valp = make_room(mem_start, mem_end, 4, 4);
2687 *(__be32 *)valp = cpu_to_be32(node);
2688 }
2689 }
2690
2691 /* do all our children */
2692 child = call_prom("child", 1, 1, node);
2693 while (child != 0) {
2694 scan_dt_build_struct(child, mem_start, mem_end);
2695 child = call_prom("peer", 1, 1, child);
2696 }
2697
2698 dt_push_token(OF_DT_END_NODE, mem_start, mem_end);
2699}
2700
2701static void __init flatten_device_tree(void)
2702{
2703 phandle root;
2704 unsigned long mem_start, mem_end, room;
2705 struct boot_param_header *hdr;
2706 char *namep;
2707 u64 *rsvmap;
2708
2709 /*
2710 * Check how much room we have between alloc top & bottom (+/- a
2711 * few pages), crop to 1MB, as this is our "chunk" size
2712 */
2713 room = alloc_top - alloc_bottom - 0x4000;
2714 if (room > DEVTREE_CHUNK_SIZE)
2715 room = DEVTREE_CHUNK_SIZE;
2716 prom_debug("starting device tree allocs at %lx\n", alloc_bottom);
2717
2718 /* Now try to claim that */
2719 mem_start = (unsigned long)alloc_up(room, PAGE_SIZE);
2720 if (mem_start == 0)
2721 prom_panic("Can't allocate initial device-tree chunk\n");
2722 mem_end = mem_start + room;
2723
2724 /* Get root of tree */
2725 root = call_prom("peer", 1, 1, (phandle)0);
2726 if (root == (phandle)0)
2727 prom_panic ("couldn't get device tree root\n");
2728
2729 /* Build header and make room for mem rsv map */
2730 mem_start = ALIGN(mem_start, 4);
2731 hdr = make_room(&mem_start, &mem_end,
2732 sizeof(struct boot_param_header), 4);
2733 dt_header_start = (unsigned long)hdr;
2734 rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8);
2735
2736 /* Start of strings */
2737 mem_start = PAGE_ALIGN(mem_start);
2738 dt_string_start = mem_start;
2739 mem_start += 4; /* hole */
2740
2741 /* Add "phandle" in there, we'll need it */
2742 namep = make_room(&mem_start, &mem_end, 16, 1);
2743 prom_strscpy_pad(namep, "phandle", sizeof("phandle"));
2744 mem_start = (unsigned long)namep + prom_strlen(namep) + 1;
2745
2746 /* Build string array */
2747 prom_printf("Building dt strings...\n");
2748 scan_dt_build_strings(root, &mem_start, &mem_end);
2749 dt_string_end = mem_start;
2750
2751 /* Build structure */
2752 mem_start = PAGE_ALIGN(mem_start);
2753 dt_struct_start = mem_start;
2754 prom_printf("Building dt structure...\n");
2755 scan_dt_build_struct(root, &mem_start, &mem_end);
2756 dt_push_token(OF_DT_END, &mem_start, &mem_end);
2757 dt_struct_end = PAGE_ALIGN(mem_start);
2758
2759 /* Finish header */
2760 hdr->boot_cpuid_phys = cpu_to_be32(prom.cpu);
2761 hdr->magic = cpu_to_be32(OF_DT_HEADER);
2762 hdr->totalsize = cpu_to_be32(dt_struct_end - dt_header_start);
2763 hdr->off_dt_struct = cpu_to_be32(dt_struct_start - dt_header_start);
2764 hdr->off_dt_strings = cpu_to_be32(dt_string_start - dt_header_start);
2765 hdr->dt_strings_size = cpu_to_be32(dt_string_end - dt_string_start);
2766 hdr->off_mem_rsvmap = cpu_to_be32(((unsigned long)rsvmap) - dt_header_start);
2767 hdr->version = cpu_to_be32(OF_DT_VERSION);
2768 /* Version 16 is not backward compatible */
2769 hdr->last_comp_version = cpu_to_be32(0x10);
2770
2771 /* Copy the reserve map in */
2772 memcpy(rsvmap, mem_reserve_map, sizeof(mem_reserve_map));
2773
2774#ifdef DEBUG_PROM
2775 {
2776 int i;
2777 prom_printf("reserved memory map:\n");
2778 for (i = 0; i < mem_reserve_cnt; i++)
2779 prom_printf(" %llx - %llx\n",
2780 be64_to_cpu(mem_reserve_map[i].base),
2781 be64_to_cpu(mem_reserve_map[i].size));
2782 }
2783#endif
2784 /* Bump mem_reserve_cnt to cause further reservations to fail
2785 * since it's too late.
2786 */
2787 mem_reserve_cnt = MEM_RESERVE_MAP_SIZE;
2788
2789 prom_printf("Device tree strings 0x%lx -> 0x%lx\n",
2790 dt_string_start, dt_string_end);
2791 prom_printf("Device tree struct 0x%lx -> 0x%lx\n",
2792 dt_struct_start, dt_struct_end);
2793}
2794
2795#ifdef CONFIG_PPC_CHRP
2796/*
2797 * Pegasos and BriQ lacks the "ranges" property in the isa node
2798 * Pegasos needs decimal IRQ 14/15, not hexadecimal
2799 * Pegasos has the IDE configured in legacy mode, but advertised as native
2800 */
2801static void __init fixup_device_tree_chrp(void)
2802{
2803 phandle ph;
2804 u32 prop[6];
2805 u32 rloc = 0x01006000; /* IO space; PCI device = 12 */
2806 char *name;
2807 int rc;
2808
2809 name = "/pci@80000000/isa@c";
2810 ph = call_prom("finddevice", 1, 1, ADDR(name));
2811 if (!PHANDLE_VALID(ph)) {
2812 name = "/pci@ff500000/isa@6";
2813 ph = call_prom("finddevice", 1, 1, ADDR(name));
2814 rloc = 0x01003000; /* IO space; PCI device = 6 */
2815 }
2816 if (PHANDLE_VALID(ph)) {
2817 rc = prom_getproplen(ph, "ranges");
2818 if (rc == 0 || rc == PROM_ERROR) {
2819 prom_printf("Fixing up missing ISA range on Pegasos...\n");
2820
2821 prop[0] = 0x1;
2822 prop[1] = 0x0;
2823 prop[2] = rloc;
2824 prop[3] = 0x0;
2825 prop[4] = 0x0;
2826 prop[5] = 0x00010000;
2827 prom_setprop(ph, name, "ranges", prop, sizeof(prop));
2828 }
2829 }
2830
2831 name = "/pci@80000000/ide@C,1";
2832 ph = call_prom("finddevice", 1, 1, ADDR(name));
2833 if (PHANDLE_VALID(ph)) {
2834 prom_printf("Fixing up IDE interrupt on Pegasos...\n");
2835 prop[0] = 14;
2836 prop[1] = 0x0;
2837 prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32));
2838 prom_printf("Fixing up IDE class-code on Pegasos...\n");
2839 rc = prom_getprop(ph, "class-code", prop, sizeof(u32));
2840 if (rc == sizeof(u32)) {
2841 prop[0] &= ~0x5;
2842 prom_setprop(ph, name, "class-code", prop, sizeof(u32));
2843 }
2844 }
2845}
2846#else
2847#define fixup_device_tree_chrp()
2848#endif
2849
2850#if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)
2851static void __init fixup_device_tree_pmac64(void)
2852{
2853 phandle u3, i2c, mpic;
2854 u32 u3_rev;
2855 u32 interrupts[2];
2856 u32 parent;
2857
2858 /* Some G5s have a missing interrupt definition, fix it up here */
2859 u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000"));
2860 if (!PHANDLE_VALID(u3))
2861 return;
2862 i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000"));
2863 if (!PHANDLE_VALID(i2c))
2864 return;
2865 mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000"));
2866 if (!PHANDLE_VALID(mpic))
2867 return;
2868
2869 /* check if proper rev of u3 */
2870 if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev))
2871 == PROM_ERROR)
2872 return;
2873 if (u3_rev < 0x35 || u3_rev > 0x39)
2874 return;
2875 /* does it need fixup ? */
2876 if (prom_getproplen(i2c, "interrupts") > 0)
2877 return;
2878
2879 prom_printf("fixing up bogus interrupts for u3 i2c...\n");
2880
2881 /* interrupt on this revision of u3 is number 0 and level */
2882 interrupts[0] = 0;
2883 interrupts[1] = 1;
2884 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts",
2885 &interrupts, sizeof(interrupts));
2886 parent = (u32)mpic;
2887 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent",
2888 &parent, sizeof(parent));
2889}
2890#else
2891#define fixup_device_tree_pmac64()
2892#endif
2893
2894#ifdef CONFIG_PPC_PMAC
2895static void __init fixup_device_tree_pmac(void)
2896{
2897 __be32 val = 1;
2898 char type[8];
2899 phandle node;
2900
2901 // Some pmacs are missing #size-cells on escc nodes
2902 for (node = 0; prom_next_node(&node); ) {
2903 type[0] = '\0';
2904 prom_getprop(node, "device_type", type, sizeof(type));
2905 if (prom_strcmp(type, "escc"))
2906 continue;
2907
2908 if (prom_getproplen(node, "#size-cells") != PROM_ERROR)
2909 continue;
2910
2911 prom_setprop(node, NULL, "#size-cells", &val, sizeof(val));
2912 }
2913}
2914#else
2915static inline void fixup_device_tree_pmac(void) { }
2916#endif
2917
2918#ifdef CONFIG_PPC_EFIKA
2919/*
2920 * The MPC5200 FEC driver requires an phy-handle property to tell it how
2921 * to talk to the phy. If the phy-handle property is missing, then this
2922 * function is called to add the appropriate nodes and link it to the
2923 * ethernet node.
2924 */
2925static void __init fixup_device_tree_efika_add_phy(void)
2926{
2927 u32 node;
2928 char prop[64];
2929 int rv;
2930
2931 /* Check if /builtin/ethernet exists - bail if it doesn't */
2932 node = call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet"));
2933 if (!PHANDLE_VALID(node))
2934 return;
2935
2936 /* Check if the phy-handle property exists - bail if it does */
2937 rv = prom_getprop(node, "phy-handle", prop, sizeof(prop));
2938 if (rv <= 0)
2939 return;
2940
2941 /*
2942 * At this point the ethernet device doesn't have a phy described.
2943 * Now we need to add the missing phy node and linkage
2944 */
2945
2946 /* Check for an MDIO bus node - if missing then create one */
2947 node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio"));
2948 if (!PHANDLE_VALID(node)) {
2949 prom_printf("Adding Ethernet MDIO node\n");
2950 call_prom("interpret", 1, 1,
2951 " s\" /builtin\" find-device"
2952 " new-device"
2953 " 1 encode-int s\" #address-cells\" property"
2954 " 0 encode-int s\" #size-cells\" property"
2955 " s\" mdio\" device-name"
2956 " s\" fsl,mpc5200b-mdio\" encode-string"
2957 " s\" compatible\" property"
2958 " 0xf0003000 0x400 reg"
2959 " 0x2 encode-int"
2960 " 0x5 encode-int encode+"
2961 " 0x3 encode-int encode+"
2962 " s\" interrupts\" property"
2963 " finish-device");
2964 }
2965
2966 /* Check for a PHY device node - if missing then create one and
2967 * give it's phandle to the ethernet node */
2968 node = call_prom("finddevice", 1, 1,
2969 ADDR("/builtin/mdio/ethernet-phy"));
2970 if (!PHANDLE_VALID(node)) {
2971 prom_printf("Adding Ethernet PHY node\n");
2972 call_prom("interpret", 1, 1,
2973 " s\" /builtin/mdio\" find-device"
2974 " new-device"
2975 " s\" ethernet-phy\" device-name"
2976 " 0x10 encode-int s\" reg\" property"
2977 " my-self"
2978 " ihandle>phandle"
2979 " finish-device"
2980 " s\" /builtin/ethernet\" find-device"
2981 " encode-int"
2982 " s\" phy-handle\" property"
2983 " device-end");
2984 }
2985}
2986
2987static void __init fixup_device_tree_efika(void)
2988{
2989 int sound_irq[3] = { 2, 2, 0 };
2990 int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0,
2991 3,4,0, 3,5,0, 3,6,0, 3,7,0,
2992 3,8,0, 3,9,0, 3,10,0, 3,11,0,
2993 3,12,0, 3,13,0, 3,14,0, 3,15,0 };
2994 u32 node;
2995 char prop[64];
2996 int rv, len;
2997
2998 /* Check if we're really running on a EFIKA */
2999 node = call_prom("finddevice", 1, 1, ADDR("/"));
3000 if (!PHANDLE_VALID(node))
3001 return;
3002
3003 rv = prom_getprop(node, "model", prop, sizeof(prop));
3004 if (rv == PROM_ERROR)
3005 return;
3006 if (prom_strcmp(prop, "EFIKA5K2"))
3007 return;
3008
3009 prom_printf("Applying EFIKA device tree fixups\n");
3010
3011 /* Claiming to be 'chrp' is death */
3012 node = call_prom("finddevice", 1, 1, ADDR("/"));
3013 rv = prom_getprop(node, "device_type", prop, sizeof(prop));
3014 if (rv != PROM_ERROR && (prom_strcmp(prop, "chrp") == 0))
3015 prom_setprop(node, "/", "device_type", "efika", sizeof("efika"));
3016
3017 /* CODEGEN,description is exposed in /proc/cpuinfo so
3018 fix that too */
3019 rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop));
3020 if (rv != PROM_ERROR && (prom_strstr(prop, "CHRP")))
3021 prom_setprop(node, "/", "CODEGEN,description",
3022 "Efika 5200B PowerPC System",
3023 sizeof("Efika 5200B PowerPC System"));
3024
3025 /* Fixup bestcomm interrupts property */
3026 node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm"));
3027 if (PHANDLE_VALID(node)) {
3028 len = prom_getproplen(node, "interrupts");
3029 if (len == 12) {
3030 prom_printf("Fixing bestcomm interrupts property\n");
3031 prom_setprop(node, "/builtin/bestcom", "interrupts",
3032 bcomm_irq, sizeof(bcomm_irq));
3033 }
3034 }
3035
3036 /* Fixup sound interrupts property */
3037 node = call_prom("finddevice", 1, 1, ADDR("/builtin/sound"));
3038 if (PHANDLE_VALID(node)) {
3039 rv = prom_getprop(node, "interrupts", prop, sizeof(prop));
3040 if (rv == PROM_ERROR) {
3041 prom_printf("Adding sound interrupts property\n");
3042 prom_setprop(node, "/builtin/sound", "interrupts",
3043 sound_irq, sizeof(sound_irq));
3044 }
3045 }
3046
3047 /* Make sure ethernet phy-handle property exists */
3048 fixup_device_tree_efika_add_phy();
3049}
3050#else
3051#define fixup_device_tree_efika()
3052#endif
3053
3054#ifdef CONFIG_PPC_PASEMI_NEMO
3055/*
3056 * CFE supplied on Nemo is broken in several ways, biggest
3057 * problem is that it reassigns ISA interrupts to unused mpic ints.
3058 * Add an interrupt-controller property for the io-bridge to use
3059 * and correct the ints so we can attach them to an irq_domain
3060 */
3061static void __init fixup_device_tree_pasemi(void)
3062{
3063 u32 interrupts[2], parent, rval, val = 0;
3064 char *name, *pci_name;
3065 phandle iob, node;
3066
3067 /* Find the root pci node */
3068 name = "/pxp@0,e0000000";
3069 iob = call_prom("finddevice", 1, 1, ADDR(name));
3070 if (!PHANDLE_VALID(iob))
3071 return;
3072
3073 /* check if interrupt-controller node set yet */
3074 if (prom_getproplen(iob, "interrupt-controller") !=PROM_ERROR)
3075 return;
3076
3077 prom_printf("adding interrupt-controller property for SB600...\n");
3078
3079 prom_setprop(iob, name, "interrupt-controller", &val, 0);
3080
3081 pci_name = "/pxp@0,e0000000/pci@11";
3082 node = call_prom("finddevice", 1, 1, ADDR(pci_name));
3083 parent = ADDR(iob);
3084
3085 for( ; prom_next_node(&node); ) {
3086 /* scan each node for one with an interrupt */
3087 if (!PHANDLE_VALID(node))
3088 continue;
3089
3090 rval = prom_getproplen(node, "interrupts");
3091 if (rval == 0 || rval == PROM_ERROR)
3092 continue;
3093
3094 prom_getprop(node, "interrupts", &interrupts, sizeof(interrupts));
3095 if ((interrupts[0] < 212) || (interrupts[0] > 222))
3096 continue;
3097
3098 /* found a node, update both interrupts and interrupt-parent */
3099 if ((interrupts[0] >= 212) && (interrupts[0] <= 215))
3100 interrupts[0] -= 203;
3101 if ((interrupts[0] >= 216) && (interrupts[0] <= 220))
3102 interrupts[0] -= 213;
3103 if (interrupts[0] == 221)
3104 interrupts[0] = 14;
3105 if (interrupts[0] == 222)
3106 interrupts[0] = 8;
3107
3108 prom_setprop(node, pci_name, "interrupts", interrupts,
3109 sizeof(interrupts));
3110 prom_setprop(node, pci_name, "interrupt-parent", &parent,
3111 sizeof(parent));
3112 }
3113
3114 /*
3115 * The io-bridge has device_type set to 'io-bridge' change it to 'isa'
3116 * so that generic isa-bridge code can add the SB600 and its on-board
3117 * peripherals.
3118 */
3119 name = "/pxp@0,e0000000/io-bridge@0";
3120 iob = call_prom("finddevice", 1, 1, ADDR(name));
3121 if (!PHANDLE_VALID(iob))
3122 return;
3123
3124 /* device_type is already set, just change it. */
3125
3126 prom_printf("Changing device_type of SB600 node...\n");
3127
3128 prom_setprop(iob, name, "device_type", "isa", sizeof("isa"));
3129}
3130#else /* !CONFIG_PPC_PASEMI_NEMO */
3131static inline void fixup_device_tree_pasemi(void) { }
3132#endif
3133
3134static void __init fixup_device_tree(void)
3135{
3136 fixup_device_tree_chrp();
3137 fixup_device_tree_pmac();
3138 fixup_device_tree_pmac64();
3139 fixup_device_tree_efika();
3140 fixup_device_tree_pasemi();
3141}
3142
3143static void __init prom_find_boot_cpu(void)
3144{
3145 __be32 rval;
3146 ihandle prom_cpu;
3147 phandle cpu_pkg;
3148
3149 rval = 0;
3150 if (prom_getprop(prom.chosen, "cpu", &rval, sizeof(rval)) <= 0)
3151 return;
3152 prom_cpu = be32_to_cpu(rval);
3153
3154 cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu);
3155
3156 if (!PHANDLE_VALID(cpu_pkg))
3157 return;
3158
3159 prom_getprop(cpu_pkg, "reg", &rval, sizeof(rval));
3160 prom.cpu = be32_to_cpu(rval);
3161
3162 prom_debug("Booting CPU hw index = %d\n", prom.cpu);
3163}
3164
3165static void __init prom_check_initrd(unsigned long r3, unsigned long r4)
3166{
3167#ifdef CONFIG_BLK_DEV_INITRD
3168 if (r3 && r4 && r4 != 0xdeadbeef) {
3169 __be64 val;
3170
3171 prom_initrd_start = is_kernel_addr(r3) ? __pa(r3) : r3;
3172 prom_initrd_end = prom_initrd_start + r4;
3173
3174 val = cpu_to_be64(prom_initrd_start);
3175 prom_setprop(prom.chosen, "/chosen", "linux,initrd-start",
3176 &val, sizeof(val));
3177 val = cpu_to_be64(prom_initrd_end);
3178 prom_setprop(prom.chosen, "/chosen", "linux,initrd-end",
3179 &val, sizeof(val));
3180
3181 reserve_mem(prom_initrd_start,
3182 prom_initrd_end - prom_initrd_start);
3183
3184 prom_debug("initrd_start=0x%lx\n", prom_initrd_start);
3185 prom_debug("initrd_end=0x%lx\n", prom_initrd_end);
3186 }
3187#endif /* CONFIG_BLK_DEV_INITRD */
3188}
3189
3190#ifdef CONFIG_PPC_SVM
3191/*
3192 * Perform the Enter Secure Mode ultracall.
3193 */
3194static int __init enter_secure_mode(unsigned long kbase, unsigned long fdt)
3195{
3196 register unsigned long r3 asm("r3") = UV_ESM;
3197 register unsigned long r4 asm("r4") = kbase;
3198 register unsigned long r5 asm("r5") = fdt;
3199
3200 asm volatile("sc 2" : "+r"(r3) : "r"(r4), "r"(r5));
3201
3202 return r3;
3203}
3204
3205/*
3206 * Call the Ultravisor to transfer us to secure memory if we have an ESM blob.
3207 */
3208static void __init setup_secure_guest(unsigned long kbase, unsigned long fdt)
3209{
3210 int ret;
3211
3212 if (!prom_svm_enable)
3213 return;
3214
3215 /* Switch to secure mode. */
3216 prom_printf("Switching to secure mode.\n");
3217
3218 /*
3219 * The ultravisor will do an integrity check of the kernel image but we
3220 * relocated it so the check will fail. Restore the original image by
3221 * relocating it back to the kernel virtual base address.
3222 */
3223 relocate(KERNELBASE);
3224
3225 ret = enter_secure_mode(kbase, fdt);
3226
3227 /* Relocate the kernel again. */
3228 relocate(kbase);
3229
3230 if (ret != U_SUCCESS) {
3231 prom_printf("Returned %d from switching to secure mode.\n", ret);
3232 prom_rtas_os_term("Switch to secure mode failed.\n");
3233 }
3234}
3235#else
3236static void __init setup_secure_guest(unsigned long kbase, unsigned long fdt)
3237{
3238}
3239#endif /* CONFIG_PPC_SVM */
3240
3241/*
3242 * We enter here early on, when the Open Firmware prom is still
3243 * handling exceptions and the MMU hash table for us.
3244 */
3245
3246unsigned long __init prom_init(unsigned long r3, unsigned long r4,
3247 unsigned long pp,
3248 unsigned long r6, unsigned long r7,
3249 unsigned long kbase)
3250{
3251 unsigned long hdr;
3252
3253#ifdef CONFIG_PPC32
3254 unsigned long offset = reloc_offset();
3255 reloc_got2(offset);
3256#endif
3257
3258 /*
3259 * First zero the BSS
3260 */
3261 memset(&__bss_start, 0, __bss_stop - __bss_start);
3262
3263 /*
3264 * Init interface to Open Firmware, get some node references,
3265 * like /chosen
3266 */
3267 prom_init_client_services(pp);
3268
3269 /*
3270 * See if this OF is old enough that we need to do explicit maps
3271 * and other workarounds
3272 */
3273 prom_find_mmu();
3274
3275 /*
3276 * Init prom stdout device
3277 */
3278 prom_init_stdout();
3279
3280 prom_printf("Preparing to boot %s", linux_banner);
3281
3282 /*
3283 * Get default machine type. At this point, we do not differentiate
3284 * between pSeries SMP and pSeries LPAR
3285 */
3286 of_platform = prom_find_machine_type();
3287 prom_printf("Detected machine type: %x\n", of_platform);
3288
3289#ifndef CONFIG_NONSTATIC_KERNEL
3290 /* Bail if this is a kdump kernel. */
3291 if (PHYSICAL_START > 0)
3292 prom_panic("Error: You can't boot a kdump kernel from OF!\n");
3293#endif
3294
3295 /*
3296 * Check for an initrd
3297 */
3298 prom_check_initrd(r3, r4);
3299
3300 /*
3301 * Do early parsing of command line
3302 */
3303 early_cmdline_parse();
3304
3305#ifdef CONFIG_PPC_PSERIES
3306 /*
3307 * On pSeries, inform the firmware about our capabilities
3308 */
3309 if (of_platform == PLATFORM_PSERIES ||
3310 of_platform == PLATFORM_PSERIES_LPAR)
3311 prom_send_capabilities();
3312#endif
3313
3314 /*
3315 * Copy the CPU hold code
3316 */
3317 if (of_platform != PLATFORM_POWERMAC)
3318 copy_and_flush(0, kbase, 0x100, 0);
3319
3320 /*
3321 * Initialize memory management within prom_init
3322 */
3323 prom_init_mem();
3324
3325 /*
3326 * Determine which cpu is actually running right _now_
3327 */
3328 prom_find_boot_cpu();
3329
3330 /*
3331 * Initialize display devices
3332 */
3333 prom_check_displays();
3334
3335#if defined(CONFIG_PPC64) && defined(__BIG_ENDIAN__)
3336 /*
3337 * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else
3338 * that uses the allocator, we need to make sure we get the top of memory
3339 * available for us here...
3340 */
3341 if (of_platform == PLATFORM_PSERIES)
3342 prom_initialize_tce_table();
3343#endif
3344
3345 /*
3346 * On non-powermacs, try to instantiate RTAS. PowerMacs don't
3347 * have a usable RTAS implementation.
3348 */
3349 if (of_platform != PLATFORM_POWERMAC)
3350 prom_instantiate_rtas();
3351
3352#ifdef CONFIG_PPC64
3353 /* instantiate sml */
3354 prom_instantiate_sml();
3355#endif
3356
3357 /*
3358 * On non-powermacs, put all CPUs in spin-loops.
3359 *
3360 * PowerMacs use a different mechanism to spin CPUs
3361 *
3362 * (This must be done after instantiating RTAS)
3363 */
3364 if (of_platform != PLATFORM_POWERMAC)
3365 prom_hold_cpus();
3366
3367 /*
3368 * Fill in some infos for use by the kernel later on
3369 */
3370 if (prom_memory_limit) {
3371 __be64 val = cpu_to_be64(prom_memory_limit);
3372 prom_setprop(prom.chosen, "/chosen", "linux,memory-limit",
3373 &val, sizeof(val));
3374 }
3375#ifdef CONFIG_PPC64
3376 if (prom_iommu_off)
3377 prom_setprop(prom.chosen, "/chosen", "linux,iommu-off",
3378 NULL, 0);
3379
3380 if (prom_iommu_force_on)
3381 prom_setprop(prom.chosen, "/chosen", "linux,iommu-force-on",
3382 NULL, 0);
3383
3384 if (prom_tce_alloc_start) {
3385 prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-start",
3386 &prom_tce_alloc_start,
3387 sizeof(prom_tce_alloc_start));
3388 prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-end",
3389 &prom_tce_alloc_end,
3390 sizeof(prom_tce_alloc_end));
3391 }
3392#endif
3393
3394 /*
3395 * Fixup any known bugs in the device-tree
3396 */
3397 fixup_device_tree();
3398
3399 /*
3400 * Now finally create the flattened device-tree
3401 */
3402 prom_printf("copying OF device tree...\n");
3403 flatten_device_tree();
3404
3405 /*
3406 * in case stdin is USB and still active on IBM machines...
3407 * Unfortunately quiesce crashes on some powermacs if we have
3408 * closed stdin already (in particular the powerbook 101).
3409 */
3410 if (of_platform != PLATFORM_POWERMAC)
3411 prom_close_stdin();
3412
3413 /*
3414 * Call OF "quiesce" method to shut down pending DMA's from
3415 * devices etc...
3416 */
3417 prom_printf("Quiescing Open Firmware ...\n");
3418 call_prom("quiesce", 0, 0);
3419
3420 /*
3421 * And finally, call the kernel passing it the flattened device
3422 * tree and NULL as r5, thus triggering the new entry point which
3423 * is common to us and kexec
3424 */
3425 hdr = dt_header_start;
3426
3427 prom_printf("Booting Linux via __start() @ 0x%lx ...\n", kbase);
3428 prom_debug("->dt_header_start=0x%lx\n", hdr);
3429
3430#ifdef CONFIG_PPC32
3431 reloc_got2(-offset);
3432#endif
3433
3434 /* Move to secure memory if we're supposed to be secure guests. */
3435 setup_secure_guest(kbase, hdr);
3436
3437 __start(hdr, kbase, 0, 0, 0, 0, 0);
3438
3439 return 0;
3440}
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/pci.h>
41#include <asm/iommu.h>
42#include <asm/btext.h>
43#include <asm/sections.h>
44#include <asm/machdep.h>
45#include <asm/opal.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 * On ppc64 we have to relocate the references explicitly with
70 * RELOC. (Note that strings count as static variables.)
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#ifdef CONFIG_PPC64
83#define RELOC(x) (*PTRRELOC(&(x)))
84#define ADDR(x) (u32) add_reloc_offset((unsigned long)(x))
85#define OF_WORKAROUNDS 0
86#else
87#define RELOC(x) (x)
88#define ADDR(x) (u32) (x)
89#define OF_WORKAROUNDS of_workarounds
90int of_workarounds;
91#endif
92
93#define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */
94#define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */
95
96#define PROM_BUG() do { \
97 prom_printf("kernel BUG at %s line 0x%x!\n", \
98 RELOC(__FILE__), __LINE__); \
99 __asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \
100} while (0)
101
102#ifdef DEBUG_PROM
103#define prom_debug(x...) prom_printf(x)
104#else
105#define prom_debug(x...)
106#endif
107
108
109typedef u32 prom_arg_t;
110
111struct prom_args {
112 u32 service;
113 u32 nargs;
114 u32 nret;
115 prom_arg_t args[10];
116};
117
118struct prom_t {
119 ihandle root;
120 phandle chosen;
121 int cpu;
122 ihandle stdout;
123 ihandle mmumap;
124 ihandle memory;
125};
126
127struct mem_map_entry {
128 u64 base;
129 u64 size;
130};
131
132typedef u32 cell_t;
133
134extern void __start(unsigned long r3, unsigned long r4, unsigned long r5,
135 unsigned long r6, unsigned long r7, unsigned long r8,
136 unsigned long r9);
137
138#ifdef CONFIG_PPC64
139extern int enter_prom(struct prom_args *args, unsigned long entry);
140#else
141static inline int enter_prom(struct prom_args *args, unsigned long entry)
142{
143 return ((int (*)(struct prom_args *))entry)(args);
144}
145#endif
146
147extern void copy_and_flush(unsigned long dest, unsigned long src,
148 unsigned long size, unsigned long offset);
149
150/* prom structure */
151static struct prom_t __initdata prom;
152
153static unsigned long prom_entry __initdata;
154
155#define PROM_SCRATCH_SIZE 256
156
157static char __initdata of_stdout_device[256];
158static char __initdata prom_scratch[PROM_SCRATCH_SIZE];
159
160static unsigned long __initdata dt_header_start;
161static unsigned long __initdata dt_struct_start, dt_struct_end;
162static unsigned long __initdata dt_string_start, dt_string_end;
163
164static unsigned long __initdata prom_initrd_start, prom_initrd_end;
165
166#ifdef CONFIG_PPC64
167static int __initdata prom_iommu_force_on;
168static int __initdata prom_iommu_off;
169static unsigned long __initdata prom_tce_alloc_start;
170static unsigned long __initdata prom_tce_alloc_end;
171#endif
172
173/* Platforms codes are now obsolete in the kernel. Now only used within this
174 * file and ultimately gone too. Feel free to change them if you need, they
175 * are not shared with anything outside of this file anymore
176 */
177#define PLATFORM_PSERIES 0x0100
178#define PLATFORM_PSERIES_LPAR 0x0101
179#define PLATFORM_LPAR 0x0001
180#define PLATFORM_POWERMAC 0x0400
181#define PLATFORM_GENERIC 0x0500
182#define PLATFORM_OPAL 0x0600
183
184static int __initdata of_platform;
185
186static char __initdata prom_cmd_line[COMMAND_LINE_SIZE];
187
188static unsigned long __initdata prom_memory_limit;
189
190static unsigned long __initdata alloc_top;
191static unsigned long __initdata alloc_top_high;
192static unsigned long __initdata alloc_bottom;
193static unsigned long __initdata rmo_top;
194static unsigned long __initdata ram_top;
195
196static struct mem_map_entry __initdata mem_reserve_map[MEM_RESERVE_MAP_SIZE];
197static int __initdata mem_reserve_cnt;
198
199static cell_t __initdata regbuf[1024];
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 = ADDR(service);
225 args.nargs = nargs;
226 args.nret = nret;
227
228 va_start(list, nret);
229 for (i = 0; i < nargs; i++)
230 args.args[i] = 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, RELOC(prom_entry)) < 0)
237 return PROM_ERROR;
238
239 return (nret > 0) ? 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 = ADDR(service);
250 args.nargs = nargs;
251 args.nret = nret;
252
253 va_start(list, rets);
254 for (i = 0; i < nargs; i++)
255 args.args[i] = 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, RELOC(prom_entry)) < 0)
262 return PROM_ERROR;
263
264 if (rets != NULL)
265 for (i = 1; i < nret; ++i)
266 rets[i-1] = args.args[nargs+i];
267
268 return (nret > 0) ? args.args[nargs] : 0;
269}
270
271
272static void __init prom_print(const char *msg)
273{
274 const char *p, *q;
275 struct prom_t *_prom = &RELOC(prom);
276
277 if (_prom->stdout == 0)
278 return;
279
280 for (p = msg; *p != 0; p = q) {
281 for (q = p; *q != 0 && *q != '\n'; ++q)
282 ;
283 if (q > p)
284 call_prom("write", 3, 1, _prom->stdout, p, q - p);
285 if (*q == 0)
286 break;
287 ++q;
288 call_prom("write", 3, 1, _prom->stdout, ADDR("\r\n"), 2);
289 }
290}
291
292
293static void __init prom_print_hex(unsigned long val)
294{
295 int i, nibbles = sizeof(val)*2;
296 char buf[sizeof(val)*2+1];
297 struct prom_t *_prom = &RELOC(prom);
298
299 for (i = nibbles-1; i >= 0; i--) {
300 buf[i] = (val & 0xf) + '0';
301 if (buf[i] > '9')
302 buf[i] += ('a'-'0'-10);
303 val >>= 4;
304 }
305 buf[nibbles] = '\0';
306 call_prom("write", 3, 1, _prom->stdout, buf, nibbles);
307}
308
309/* max number of decimal digits in an unsigned long */
310#define UL_DIGITS 21
311static void __init prom_print_dec(unsigned long val)
312{
313 int i, size;
314 char buf[UL_DIGITS+1];
315 struct prom_t *_prom = &RELOC(prom);
316
317 for (i = UL_DIGITS-1; i >= 0; i--) {
318 buf[i] = (val % 10) + '0';
319 val = val/10;
320 if (val == 0)
321 break;
322 }
323 /* shift stuff down */
324 size = UL_DIGITS - i;
325 call_prom("write", 3, 1, _prom->stdout, buf+i, size);
326}
327
328static void __init prom_printf(const char *format, ...)
329{
330 const char *p, *q, *s;
331 va_list args;
332 unsigned long v;
333 long vs;
334 struct prom_t *_prom = &RELOC(prom);
335
336 va_start(args, format);
337#ifdef CONFIG_PPC64
338 format = PTRRELOC(format);
339#endif
340 for (p = format; *p != 0; p = q) {
341 for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q)
342 ;
343 if (q > p)
344 call_prom("write", 3, 1, _prom->stdout, p, q - p);
345 if (*q == 0)
346 break;
347 if (*q == '\n') {
348 ++q;
349 call_prom("write", 3, 1, _prom->stdout,
350 ADDR("\r\n"), 2);
351 continue;
352 }
353 ++q;
354 if (*q == 0)
355 break;
356 switch (*q) {
357 case 's':
358 ++q;
359 s = va_arg(args, const char *);
360 prom_print(s);
361 break;
362 case 'x':
363 ++q;
364 v = va_arg(args, unsigned long);
365 prom_print_hex(v);
366 break;
367 case 'd':
368 ++q;
369 vs = va_arg(args, int);
370 if (vs < 0) {
371 prom_print(RELOC("-"));
372 vs = -vs;
373 }
374 prom_print_dec(vs);
375 break;
376 case 'l':
377 ++q;
378 if (*q == 0)
379 break;
380 else if (*q == 'x') {
381 ++q;
382 v = va_arg(args, unsigned long);
383 prom_print_hex(v);
384 } else if (*q == 'u') { /* '%lu' */
385 ++q;
386 v = va_arg(args, unsigned long);
387 prom_print_dec(v);
388 } else if (*q == 'd') { /* %ld */
389 ++q;
390 vs = va_arg(args, long);
391 if (vs < 0) {
392 prom_print(RELOC("-"));
393 vs = -vs;
394 }
395 prom_print_dec(vs);
396 }
397 break;
398 }
399 }
400}
401
402
403static unsigned int __init prom_claim(unsigned long virt, unsigned long size,
404 unsigned long align)
405{
406 struct prom_t *_prom = &RELOC(prom);
407
408 if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) {
409 /*
410 * Old OF requires we claim physical and virtual separately
411 * and then map explicitly (assuming virtual mode)
412 */
413 int ret;
414 prom_arg_t result;
415
416 ret = call_prom_ret("call-method", 5, 2, &result,
417 ADDR("claim"), _prom->memory,
418 align, size, virt);
419 if (ret != 0 || result == -1)
420 return -1;
421 ret = call_prom_ret("call-method", 5, 2, &result,
422 ADDR("claim"), _prom->mmumap,
423 align, size, virt);
424 if (ret != 0) {
425 call_prom("call-method", 4, 1, ADDR("release"),
426 _prom->memory, size, virt);
427 return -1;
428 }
429 /* the 0x12 is M (coherence) + PP == read/write */
430 call_prom("call-method", 6, 1,
431 ADDR("map"), _prom->mmumap, 0x12, size, virt, virt);
432 return virt;
433 }
434 return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size,
435 (prom_arg_t)align);
436}
437
438static void __init __attribute__((noreturn)) prom_panic(const char *reason)
439{
440#ifdef CONFIG_PPC64
441 reason = PTRRELOC(reason);
442#endif
443 prom_print(reason);
444 /* Do not call exit because it clears the screen on pmac
445 * it also causes some sort of double-fault on early pmacs */
446 if (RELOC(of_platform) == PLATFORM_POWERMAC)
447 asm("trap\n");
448
449 /* ToDo: should put up an SRC here on pSeries */
450 call_prom("exit", 0, 0);
451
452 for (;;) /* should never get here */
453 ;
454}
455
456
457static int __init prom_next_node(phandle *nodep)
458{
459 phandle node;
460
461 if ((node = *nodep) != 0
462 && (*nodep = call_prom("child", 1, 1, node)) != 0)
463 return 1;
464 if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
465 return 1;
466 for (;;) {
467 if ((node = call_prom("parent", 1, 1, node)) == 0)
468 return 0;
469 if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
470 return 1;
471 }
472}
473
474static int inline prom_getprop(phandle node, const char *pname,
475 void *value, size_t valuelen)
476{
477 return call_prom("getprop", 4, 1, node, ADDR(pname),
478 (u32)(unsigned long) value, (u32) valuelen);
479}
480
481static int inline prom_getproplen(phandle node, const char *pname)
482{
483 return call_prom("getproplen", 2, 1, node, ADDR(pname));
484}
485
486static void add_string(char **str, const char *q)
487{
488 char *p = *str;
489
490 while (*q)
491 *p++ = *q++;
492 *p++ = ' ';
493 *str = p;
494}
495
496static char *tohex(unsigned int x)
497{
498 static char digits[] = "0123456789abcdef";
499 static char result[9];
500 int i;
501
502 result[8] = 0;
503 i = 8;
504 do {
505 --i;
506 result[i] = digits[x & 0xf];
507 x >>= 4;
508 } while (x != 0 && i > 0);
509 return &result[i];
510}
511
512static int __init prom_setprop(phandle node, const char *nodename,
513 const char *pname, void *value, size_t valuelen)
514{
515 char cmd[256], *p;
516
517 if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL))
518 return call_prom("setprop", 4, 1, node, ADDR(pname),
519 (u32)(unsigned long) value, (u32) valuelen);
520
521 /* gah... setprop doesn't work on longtrail, have to use interpret */
522 p = cmd;
523 add_string(&p, "dev");
524 add_string(&p, nodename);
525 add_string(&p, tohex((u32)(unsigned long) value));
526 add_string(&p, tohex(valuelen));
527 add_string(&p, tohex(ADDR(pname)));
528 add_string(&p, tohex(strlen(RELOC(pname))));
529 add_string(&p, "property");
530 *p = 0;
531 return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd);
532}
533
534/* We can't use the standard versions because of RELOC headaches. */
535#define isxdigit(c) (('0' <= (c) && (c) <= '9') \
536 || ('a' <= (c) && (c) <= 'f') \
537 || ('A' <= (c) && (c) <= 'F'))
538
539#define isdigit(c) ('0' <= (c) && (c) <= '9')
540#define islower(c) ('a' <= (c) && (c) <= 'z')
541#define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c))
542
543unsigned long prom_strtoul(const char *cp, const char **endp)
544{
545 unsigned long result = 0, base = 10, value;
546
547 if (*cp == '0') {
548 base = 8;
549 cp++;
550 if (toupper(*cp) == 'X') {
551 cp++;
552 base = 16;
553 }
554 }
555
556 while (isxdigit(*cp) &&
557 (value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) {
558 result = result * base + value;
559 cp++;
560 }
561
562 if (endp)
563 *endp = cp;
564
565 return result;
566}
567
568unsigned long prom_memparse(const char *ptr, const char **retptr)
569{
570 unsigned long ret = prom_strtoul(ptr, retptr);
571 int shift = 0;
572
573 /*
574 * We can't use a switch here because GCC *may* generate a
575 * jump table which won't work, because we're not running at
576 * the address we're linked at.
577 */
578 if ('G' == **retptr || 'g' == **retptr)
579 shift = 30;
580
581 if ('M' == **retptr || 'm' == **retptr)
582 shift = 20;
583
584 if ('K' == **retptr || 'k' == **retptr)
585 shift = 10;
586
587 if (shift) {
588 ret <<= shift;
589 (*retptr)++;
590 }
591
592 return ret;
593}
594
595/*
596 * Early parsing of the command line passed to the kernel, used for
597 * "mem=x" and the options that affect the iommu
598 */
599static void __init early_cmdline_parse(void)
600{
601 struct prom_t *_prom = &RELOC(prom);
602 const char *opt;
603
604 char *p;
605 int l = 0;
606
607 RELOC(prom_cmd_line[0]) = 0;
608 p = RELOC(prom_cmd_line);
609 if ((long)_prom->chosen > 0)
610 l = prom_getprop(_prom->chosen, "bootargs", p, COMMAND_LINE_SIZE-1);
611#ifdef CONFIG_CMDLINE
612 if (l <= 0 || p[0] == '\0') /* dbl check */
613 strlcpy(RELOC(prom_cmd_line),
614 RELOC(CONFIG_CMDLINE), sizeof(prom_cmd_line));
615#endif /* CONFIG_CMDLINE */
616 prom_printf("command line: %s\n", RELOC(prom_cmd_line));
617
618#ifdef CONFIG_PPC64
619 opt = strstr(RELOC(prom_cmd_line), RELOC("iommu="));
620 if (opt) {
621 prom_printf("iommu opt is: %s\n", opt);
622 opt += 6;
623 while (*opt && *opt == ' ')
624 opt++;
625 if (!strncmp(opt, RELOC("off"), 3))
626 RELOC(prom_iommu_off) = 1;
627 else if (!strncmp(opt, RELOC("force"), 5))
628 RELOC(prom_iommu_force_on) = 1;
629 }
630#endif
631 opt = strstr(RELOC(prom_cmd_line), RELOC("mem="));
632 if (opt) {
633 opt += 4;
634 RELOC(prom_memory_limit) = prom_memparse(opt, (const char **)&opt);
635#ifdef CONFIG_PPC64
636 /* Align to 16 MB == size of ppc64 large page */
637 RELOC(prom_memory_limit) = ALIGN(RELOC(prom_memory_limit), 0x1000000);
638#endif
639 }
640}
641
642#if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
643/*
644 * There are two methods for telling firmware what our capabilities are.
645 * Newer machines have an "ibm,client-architecture-support" method on the
646 * root node. For older machines, we have to call the "process-elf-header"
647 * method in the /packages/elf-loader node, passing it a fake 32-bit
648 * ELF header containing a couple of PT_NOTE sections that contain
649 * structures that contain various information.
650 */
651
652/*
653 * New method - extensible architecture description vector.
654 *
655 * Because the description vector contains a mix of byte and word
656 * values, we declare it as an unsigned char array, and use this
657 * macro to put word values in.
658 */
659#define W(x) ((x) >> 24) & 0xff, ((x) >> 16) & 0xff, \
660 ((x) >> 8) & 0xff, (x) & 0xff
661
662/* Option vector bits - generic bits in byte 1 */
663#define OV_IGNORE 0x80 /* ignore this vector */
664#define OV_CESSATION_POLICY 0x40 /* halt if unsupported option present*/
665
666/* Option vector 1: processor architectures supported */
667#define OV1_PPC_2_00 0x80 /* set if we support PowerPC 2.00 */
668#define OV1_PPC_2_01 0x40 /* set if we support PowerPC 2.01 */
669#define OV1_PPC_2_02 0x20 /* set if we support PowerPC 2.02 */
670#define OV1_PPC_2_03 0x10 /* set if we support PowerPC 2.03 */
671#define OV1_PPC_2_04 0x08 /* set if we support PowerPC 2.04 */
672#define OV1_PPC_2_05 0x04 /* set if we support PowerPC 2.05 */
673#define OV1_PPC_2_06 0x02 /* set if we support PowerPC 2.06 */
674
675/* Option vector 2: Open Firmware options supported */
676#define OV2_REAL_MODE 0x20 /* set if we want OF in real mode */
677
678/* Option vector 3: processor options supported */
679#define OV3_FP 0x80 /* floating point */
680#define OV3_VMX 0x40 /* VMX/Altivec */
681#define OV3_DFP 0x20 /* decimal FP */
682
683/* Option vector 4: IBM PAPR implementation */
684#define OV4_MIN_ENT_CAP 0x01 /* minimum VP entitled capacity */
685
686/* Option vector 5: PAPR/OF options supported */
687#define OV5_LPAR 0x80 /* logical partitioning supported */
688#define OV5_SPLPAR 0x40 /* shared-processor LPAR supported */
689/* ibm,dynamic-reconfiguration-memory property supported */
690#define OV5_DRCONF_MEMORY 0x20
691#define OV5_LARGE_PAGES 0x10 /* large pages supported */
692#define OV5_DONATE_DEDICATE_CPU 0x02 /* donate dedicated CPU support */
693/* PCIe/MSI support. Without MSI full PCIe is not supported */
694#ifdef CONFIG_PCI_MSI
695#define OV5_MSI 0x01 /* PCIe/MSI support */
696#else
697#define OV5_MSI 0x00
698#endif /* CONFIG_PCI_MSI */
699#ifdef CONFIG_PPC_SMLPAR
700#define OV5_CMO 0x80 /* Cooperative Memory Overcommitment */
701#define OV5_XCMO 0x40 /* Page Coalescing */
702#else
703#define OV5_CMO 0x00
704#define OV5_XCMO 0x00
705#endif
706#define OV5_TYPE1_AFFINITY 0x80 /* Type 1 NUMA affinity */
707#define OV5_PFO_HW_RNG 0x80 /* PFO Random Number Generator */
708#define OV5_PFO_HW_ENCR 0x20 /* PFO Encryption Accelerator */
709
710/* Option Vector 6: IBM PAPR hints */
711#define OV6_LINUX 0x02 /* Linux is our OS */
712
713/*
714 * The architecture vector has an array of PVR mask/value pairs,
715 * followed by # option vectors - 1, followed by the option vectors.
716 */
717static unsigned char ibm_architecture_vec[] = {
718 W(0xfffe0000), W(0x003a0000), /* POWER5/POWER5+ */
719 W(0xffff0000), W(0x003e0000), /* POWER6 */
720 W(0xffff0000), W(0x003f0000), /* POWER7 */
721 W(0xffffffff), W(0x0f000003), /* all 2.06-compliant */
722 W(0xffffffff), W(0x0f000002), /* all 2.05-compliant */
723 W(0xfffffffe), W(0x0f000001), /* all 2.04-compliant and earlier */
724 6 - 1, /* 6 option vectors */
725
726 /* option vector 1: processor architectures supported */
727 3 - 2, /* length */
728 0, /* don't ignore, don't halt */
729 OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 |
730 OV1_PPC_2_04 | OV1_PPC_2_05 | OV1_PPC_2_06,
731
732 /* option vector 2: Open Firmware options supported */
733 34 - 2, /* length */
734 OV2_REAL_MODE,
735 0, 0,
736 W(0xffffffff), /* real_base */
737 W(0xffffffff), /* real_size */
738 W(0xffffffff), /* virt_base */
739 W(0xffffffff), /* virt_size */
740 W(0xffffffff), /* load_base */
741 W(256), /* 256MB min RMA */
742 W(0xffffffff), /* full client load */
743 0, /* min RMA percentage of total RAM */
744 48, /* max log_2(hash table size) */
745
746 /* option vector 3: processor options supported */
747 3 - 2, /* length */
748 0, /* don't ignore, don't halt */
749 OV3_FP | OV3_VMX | OV3_DFP,
750
751 /* option vector 4: IBM PAPR implementation */
752 3 - 2, /* length */
753 0, /* don't halt */
754 OV4_MIN_ENT_CAP, /* minimum VP entitled capacity */
755
756 /* option vector 5: PAPR/OF options */
757 18 - 2, /* length */
758 0, /* don't ignore, don't halt */
759 OV5_LPAR | OV5_SPLPAR | OV5_LARGE_PAGES | OV5_DRCONF_MEMORY |
760 OV5_DONATE_DEDICATE_CPU | OV5_MSI,
761 0,
762 OV5_CMO | OV5_XCMO,
763 OV5_TYPE1_AFFINITY,
764 0,
765 0,
766 0,
767 /* WARNING: The offset of the "number of cores" field below
768 * must match by the macro below. Update the definition if
769 * the structure layout changes.
770 */
771#define IBM_ARCH_VEC_NRCORES_OFFSET 101
772 W(NR_CPUS), /* number of cores supported */
773 0,
774 0,
775 0,
776 0,
777 OV5_PFO_HW_RNG | OV5_PFO_HW_ENCR,
778
779 /* option vector 6: IBM PAPR hints */
780 4 - 2, /* length */
781 0,
782 0,
783 OV6_LINUX,
784
785};
786
787/* Old method - ELF header with PT_NOTE sections */
788static struct fake_elf {
789 Elf32_Ehdr elfhdr;
790 Elf32_Phdr phdr[2];
791 struct chrpnote {
792 u32 namesz;
793 u32 descsz;
794 u32 type;
795 char name[8]; /* "PowerPC" */
796 struct chrpdesc {
797 u32 real_mode;
798 u32 real_base;
799 u32 real_size;
800 u32 virt_base;
801 u32 virt_size;
802 u32 load_base;
803 } chrpdesc;
804 } chrpnote;
805 struct rpanote {
806 u32 namesz;
807 u32 descsz;
808 u32 type;
809 char name[24]; /* "IBM,RPA-Client-Config" */
810 struct rpadesc {
811 u32 lpar_affinity;
812 u32 min_rmo_size;
813 u32 min_rmo_percent;
814 u32 max_pft_size;
815 u32 splpar;
816 u32 min_load;
817 u32 new_mem_def;
818 u32 ignore_me;
819 } rpadesc;
820 } rpanote;
821} fake_elf = {
822 .elfhdr = {
823 .e_ident = { 0x7f, 'E', 'L', 'F',
824 ELFCLASS32, ELFDATA2MSB, EV_CURRENT },
825 .e_type = ET_EXEC, /* yeah right */
826 .e_machine = EM_PPC,
827 .e_version = EV_CURRENT,
828 .e_phoff = offsetof(struct fake_elf, phdr),
829 .e_phentsize = sizeof(Elf32_Phdr),
830 .e_phnum = 2
831 },
832 .phdr = {
833 [0] = {
834 .p_type = PT_NOTE,
835 .p_offset = offsetof(struct fake_elf, chrpnote),
836 .p_filesz = sizeof(struct chrpnote)
837 }, [1] = {
838 .p_type = PT_NOTE,
839 .p_offset = offsetof(struct fake_elf, rpanote),
840 .p_filesz = sizeof(struct rpanote)
841 }
842 },
843 .chrpnote = {
844 .namesz = sizeof("PowerPC"),
845 .descsz = sizeof(struct chrpdesc),
846 .type = 0x1275,
847 .name = "PowerPC",
848 .chrpdesc = {
849 .real_mode = ~0U, /* ~0 means "don't care" */
850 .real_base = ~0U,
851 .real_size = ~0U,
852 .virt_base = ~0U,
853 .virt_size = ~0U,
854 .load_base = ~0U
855 },
856 },
857 .rpanote = {
858 .namesz = sizeof("IBM,RPA-Client-Config"),
859 .descsz = sizeof(struct rpadesc),
860 .type = 0x12759999,
861 .name = "IBM,RPA-Client-Config",
862 .rpadesc = {
863 .lpar_affinity = 0,
864 .min_rmo_size = 64, /* in megabytes */
865 .min_rmo_percent = 0,
866 .max_pft_size = 48, /* 2^48 bytes max PFT size */
867 .splpar = 1,
868 .min_load = ~0U,
869 .new_mem_def = 0
870 }
871 }
872};
873
874static int __init prom_count_smt_threads(void)
875{
876 phandle node;
877 char type[64];
878 unsigned int plen;
879
880 /* Pick up th first CPU node we can find */
881 for (node = 0; prom_next_node(&node); ) {
882 type[0] = 0;
883 prom_getprop(node, "device_type", type, sizeof(type));
884
885 if (strcmp(type, RELOC("cpu")))
886 continue;
887 /*
888 * There is an entry for each smt thread, each entry being
889 * 4 bytes long. All cpus should have the same number of
890 * smt threads, so return after finding the first.
891 */
892 plen = prom_getproplen(node, "ibm,ppc-interrupt-server#s");
893 if (plen == PROM_ERROR)
894 break;
895 plen >>= 2;
896 prom_debug("Found %lu smt threads per core\n", (unsigned long)plen);
897
898 /* Sanity check */
899 if (plen < 1 || plen > 64) {
900 prom_printf("Threads per core %lu out of bounds, assuming 1\n",
901 (unsigned long)plen);
902 return 1;
903 }
904 return plen;
905 }
906 prom_debug("No threads found, assuming 1 per core\n");
907
908 return 1;
909
910}
911
912
913static void __init prom_send_capabilities(void)
914{
915 ihandle elfloader, root;
916 prom_arg_t ret;
917 u32 *cores;
918
919 root = call_prom("open", 1, 1, ADDR("/"));
920 if (root != 0) {
921 /* We need to tell the FW about the number of cores we support.
922 *
923 * To do that, we count the number of threads on the first core
924 * (we assume this is the same for all cores) and use it to
925 * divide NR_CPUS.
926 */
927 cores = (u32 *)PTRRELOC(&ibm_architecture_vec[IBM_ARCH_VEC_NRCORES_OFFSET]);
928 if (*cores != NR_CPUS) {
929 prom_printf("WARNING ! "
930 "ibm_architecture_vec structure inconsistent: %lu!\n",
931 *cores);
932 } else {
933 *cores = DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads());
934 prom_printf("Max number of cores passed to firmware: %lu (NR_CPUS = %lu)\n",
935 *cores, NR_CPUS);
936 }
937
938 /* try calling the ibm,client-architecture-support method */
939 prom_printf("Calling ibm,client-architecture-support...");
940 if (call_prom_ret("call-method", 3, 2, &ret,
941 ADDR("ibm,client-architecture-support"),
942 root,
943 ADDR(ibm_architecture_vec)) == 0) {
944 /* the call exists... */
945 if (ret)
946 prom_printf("\nWARNING: ibm,client-architecture"
947 "-support call FAILED!\n");
948 call_prom("close", 1, 0, root);
949 prom_printf(" done\n");
950 return;
951 }
952 call_prom("close", 1, 0, root);
953 prom_printf(" not implemented\n");
954 }
955
956 /* no ibm,client-architecture-support call, try the old way */
957 elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader"));
958 if (elfloader == 0) {
959 prom_printf("couldn't open /packages/elf-loader\n");
960 return;
961 }
962 call_prom("call-method", 3, 1, ADDR("process-elf-header"),
963 elfloader, ADDR(&fake_elf));
964 call_prom("close", 1, 0, elfloader);
965}
966#endif
967
968/*
969 * Memory allocation strategy... our layout is normally:
970 *
971 * at 14Mb or more we have vmlinux, then a gap and initrd. In some
972 * rare cases, initrd might end up being before the kernel though.
973 * We assume this won't override the final kernel at 0, we have no
974 * provision to handle that in this version, but it should hopefully
975 * never happen.
976 *
977 * alloc_top is set to the top of RMO, eventually shrink down if the
978 * TCEs overlap
979 *
980 * alloc_bottom is set to the top of kernel/initrd
981 *
982 * from there, allocations are done this way : rtas is allocated
983 * topmost, and the device-tree is allocated from the bottom. We try
984 * to grow the device-tree allocation as we progress. If we can't,
985 * then we fail, we don't currently have a facility to restart
986 * elsewhere, but that shouldn't be necessary.
987 *
988 * Note that calls to reserve_mem have to be done explicitly, memory
989 * allocated with either alloc_up or alloc_down isn't automatically
990 * reserved.
991 */
992
993
994/*
995 * Allocates memory in the RMO upward from the kernel/initrd
996 *
997 * When align is 0, this is a special case, it means to allocate in place
998 * at the current location of alloc_bottom or fail (that is basically
999 * extending the previous allocation). Used for the device-tree flattening
1000 */
1001static unsigned long __init alloc_up(unsigned long size, unsigned long align)
1002{
1003 unsigned long base = RELOC(alloc_bottom);
1004 unsigned long addr = 0;
1005
1006 if (align)
1007 base = _ALIGN_UP(base, align);
1008 prom_debug("alloc_up(%x, %x)\n", size, align);
1009 if (RELOC(ram_top) == 0)
1010 prom_panic("alloc_up() called with mem not initialized\n");
1011
1012 if (align)
1013 base = _ALIGN_UP(RELOC(alloc_bottom), align);
1014 else
1015 base = RELOC(alloc_bottom);
1016
1017 for(; (base + size) <= RELOC(alloc_top);
1018 base = _ALIGN_UP(base + 0x100000, align)) {
1019 prom_debug(" trying: 0x%x\n\r", base);
1020 addr = (unsigned long)prom_claim(base, size, 0);
1021 if (addr != PROM_ERROR && addr != 0)
1022 break;
1023 addr = 0;
1024 if (align == 0)
1025 break;
1026 }
1027 if (addr == 0)
1028 return 0;
1029 RELOC(alloc_bottom) = addr + size;
1030
1031 prom_debug(" -> %x\n", addr);
1032 prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom));
1033 prom_debug(" alloc_top : %x\n", RELOC(alloc_top));
1034 prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high));
1035 prom_debug(" rmo_top : %x\n", RELOC(rmo_top));
1036 prom_debug(" ram_top : %x\n", RELOC(ram_top));
1037
1038 return addr;
1039}
1040
1041/*
1042 * Allocates memory downward, either from top of RMO, or if highmem
1043 * is set, from the top of RAM. Note that this one doesn't handle
1044 * failures. It does claim memory if highmem is not set.
1045 */
1046static unsigned long __init alloc_down(unsigned long size, unsigned long align,
1047 int highmem)
1048{
1049 unsigned long base, addr = 0;
1050
1051 prom_debug("alloc_down(%x, %x, %s)\n", size, align,
1052 highmem ? RELOC("(high)") : RELOC("(low)"));
1053 if (RELOC(ram_top) == 0)
1054 prom_panic("alloc_down() called with mem not initialized\n");
1055
1056 if (highmem) {
1057 /* Carve out storage for the TCE table. */
1058 addr = _ALIGN_DOWN(RELOC(alloc_top_high) - size, align);
1059 if (addr <= RELOC(alloc_bottom))
1060 return 0;
1061 /* Will we bump into the RMO ? If yes, check out that we
1062 * didn't overlap existing allocations there, if we did,
1063 * we are dead, we must be the first in town !
1064 */
1065 if (addr < RELOC(rmo_top)) {
1066 /* Good, we are first */
1067 if (RELOC(alloc_top) == RELOC(rmo_top))
1068 RELOC(alloc_top) = RELOC(rmo_top) = addr;
1069 else
1070 return 0;
1071 }
1072 RELOC(alloc_top_high) = addr;
1073 goto bail;
1074 }
1075
1076 base = _ALIGN_DOWN(RELOC(alloc_top) - size, align);
1077 for (; base > RELOC(alloc_bottom);
1078 base = _ALIGN_DOWN(base - 0x100000, align)) {
1079 prom_debug(" trying: 0x%x\n\r", base);
1080 addr = (unsigned long)prom_claim(base, size, 0);
1081 if (addr != PROM_ERROR && addr != 0)
1082 break;
1083 addr = 0;
1084 }
1085 if (addr == 0)
1086 return 0;
1087 RELOC(alloc_top) = addr;
1088
1089 bail:
1090 prom_debug(" -> %x\n", addr);
1091 prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom));
1092 prom_debug(" alloc_top : %x\n", RELOC(alloc_top));
1093 prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high));
1094 prom_debug(" rmo_top : %x\n", RELOC(rmo_top));
1095 prom_debug(" ram_top : %x\n", RELOC(ram_top));
1096
1097 return addr;
1098}
1099
1100/*
1101 * Parse a "reg" cell
1102 */
1103static unsigned long __init prom_next_cell(int s, cell_t **cellp)
1104{
1105 cell_t *p = *cellp;
1106 unsigned long r = 0;
1107
1108 /* Ignore more than 2 cells */
1109 while (s > sizeof(unsigned long) / 4) {
1110 p++;
1111 s--;
1112 }
1113 r = *p++;
1114#ifdef CONFIG_PPC64
1115 if (s > 1) {
1116 r <<= 32;
1117 r |= *(p++);
1118 }
1119#endif
1120 *cellp = p;
1121 return r;
1122}
1123
1124/*
1125 * Very dumb function for adding to the memory reserve list, but
1126 * we don't need anything smarter at this point
1127 *
1128 * XXX Eventually check for collisions. They should NEVER happen.
1129 * If problems seem to show up, it would be a good start to track
1130 * them down.
1131 */
1132static void __init reserve_mem(u64 base, u64 size)
1133{
1134 u64 top = base + size;
1135 unsigned long cnt = RELOC(mem_reserve_cnt);
1136
1137 if (size == 0)
1138 return;
1139
1140 /* We need to always keep one empty entry so that we
1141 * have our terminator with "size" set to 0 since we are
1142 * dumb and just copy this entire array to the boot params
1143 */
1144 base = _ALIGN_DOWN(base, PAGE_SIZE);
1145 top = _ALIGN_UP(top, PAGE_SIZE);
1146 size = top - base;
1147
1148 if (cnt >= (MEM_RESERVE_MAP_SIZE - 1))
1149 prom_panic("Memory reserve map exhausted !\n");
1150 RELOC(mem_reserve_map)[cnt].base = base;
1151 RELOC(mem_reserve_map)[cnt].size = size;
1152 RELOC(mem_reserve_cnt) = cnt + 1;
1153}
1154
1155/*
1156 * Initialize memory allocation mechanism, parse "memory" nodes and
1157 * obtain that way the top of memory and RMO to setup out local allocator
1158 */
1159static void __init prom_init_mem(void)
1160{
1161 phandle node;
1162 char *path, type[64];
1163 unsigned int plen;
1164 cell_t *p, *endp;
1165 struct prom_t *_prom = &RELOC(prom);
1166 u32 rac, rsc;
1167
1168 /*
1169 * We iterate the memory nodes to find
1170 * 1) top of RMO (first node)
1171 * 2) top of memory
1172 */
1173 rac = 2;
1174 prom_getprop(_prom->root, "#address-cells", &rac, sizeof(rac));
1175 rsc = 1;
1176 prom_getprop(_prom->root, "#size-cells", &rsc, sizeof(rsc));
1177 prom_debug("root_addr_cells: %x\n", (unsigned long) rac);
1178 prom_debug("root_size_cells: %x\n", (unsigned long) rsc);
1179
1180 prom_debug("scanning memory:\n");
1181 path = RELOC(prom_scratch);
1182
1183 for (node = 0; prom_next_node(&node); ) {
1184 type[0] = 0;
1185 prom_getprop(node, "device_type", type, sizeof(type));
1186
1187 if (type[0] == 0) {
1188 /*
1189 * CHRP Longtrail machines have no device_type
1190 * on the memory node, so check the name instead...
1191 */
1192 prom_getprop(node, "name", type, sizeof(type));
1193 }
1194 if (strcmp(type, RELOC("memory")))
1195 continue;
1196
1197 plen = prom_getprop(node, "reg", RELOC(regbuf), sizeof(regbuf));
1198 if (plen > sizeof(regbuf)) {
1199 prom_printf("memory node too large for buffer !\n");
1200 plen = sizeof(regbuf);
1201 }
1202 p = RELOC(regbuf);
1203 endp = p + (plen / sizeof(cell_t));
1204
1205#ifdef DEBUG_PROM
1206 memset(path, 0, PROM_SCRATCH_SIZE);
1207 call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1);
1208 prom_debug(" node %s :\n", path);
1209#endif /* DEBUG_PROM */
1210
1211 while ((endp - p) >= (rac + rsc)) {
1212 unsigned long base, size;
1213
1214 base = prom_next_cell(rac, &p);
1215 size = prom_next_cell(rsc, &p);
1216
1217 if (size == 0)
1218 continue;
1219 prom_debug(" %x %x\n", base, size);
1220 if (base == 0 && (RELOC(of_platform) & PLATFORM_LPAR))
1221 RELOC(rmo_top) = size;
1222 if ((base + size) > RELOC(ram_top))
1223 RELOC(ram_top) = base + size;
1224 }
1225 }
1226
1227 RELOC(alloc_bottom) = PAGE_ALIGN((unsigned long)&RELOC(_end) + 0x4000);
1228
1229 /*
1230 * If prom_memory_limit is set we reduce the upper limits *except* for
1231 * alloc_top_high. This must be the real top of RAM so we can put
1232 * TCE's up there.
1233 */
1234
1235 RELOC(alloc_top_high) = RELOC(ram_top);
1236
1237 if (RELOC(prom_memory_limit)) {
1238 if (RELOC(prom_memory_limit) <= RELOC(alloc_bottom)) {
1239 prom_printf("Ignoring mem=%x <= alloc_bottom.\n",
1240 RELOC(prom_memory_limit));
1241 RELOC(prom_memory_limit) = 0;
1242 } else if (RELOC(prom_memory_limit) >= RELOC(ram_top)) {
1243 prom_printf("Ignoring mem=%x >= ram_top.\n",
1244 RELOC(prom_memory_limit));
1245 RELOC(prom_memory_limit) = 0;
1246 } else {
1247 RELOC(ram_top) = RELOC(prom_memory_limit);
1248 RELOC(rmo_top) = min(RELOC(rmo_top), RELOC(prom_memory_limit));
1249 }
1250 }
1251
1252 /*
1253 * Setup our top alloc point, that is top of RMO or top of
1254 * segment 0 when running non-LPAR.
1255 * Some RS64 machines have buggy firmware where claims up at
1256 * 1GB fail. Cap at 768MB as a workaround.
1257 * Since 768MB is plenty of room, and we need to cap to something
1258 * reasonable on 32-bit, cap at 768MB on all machines.
1259 */
1260 if (!RELOC(rmo_top))
1261 RELOC(rmo_top) = RELOC(ram_top);
1262 RELOC(rmo_top) = min(0x30000000ul, RELOC(rmo_top));
1263 RELOC(alloc_top) = RELOC(rmo_top);
1264 RELOC(alloc_top_high) = RELOC(ram_top);
1265
1266 /*
1267 * Check if we have an initrd after the kernel but still inside
1268 * the RMO. If we do move our bottom point to after it.
1269 */
1270 if (RELOC(prom_initrd_start) &&
1271 RELOC(prom_initrd_start) < RELOC(rmo_top) &&
1272 RELOC(prom_initrd_end) > RELOC(alloc_bottom))
1273 RELOC(alloc_bottom) = PAGE_ALIGN(RELOC(prom_initrd_end));
1274
1275 prom_printf("memory layout at init:\n");
1276 prom_printf(" memory_limit : %x (16 MB aligned)\n", RELOC(prom_memory_limit));
1277 prom_printf(" alloc_bottom : %x\n", RELOC(alloc_bottom));
1278 prom_printf(" alloc_top : %x\n", RELOC(alloc_top));
1279 prom_printf(" alloc_top_hi : %x\n", RELOC(alloc_top_high));
1280 prom_printf(" rmo_top : %x\n", RELOC(rmo_top));
1281 prom_printf(" ram_top : %x\n", RELOC(ram_top));
1282}
1283
1284static void __init prom_close_stdin(void)
1285{
1286 struct prom_t *_prom = &RELOC(prom);
1287 ihandle val;
1288
1289 if (prom_getprop(_prom->chosen, "stdin", &val, sizeof(val)) > 0)
1290 call_prom("close", 1, 0, val);
1291}
1292
1293#ifdef CONFIG_PPC_POWERNV
1294
1295static u64 __initdata prom_opal_size;
1296static u64 __initdata prom_opal_align;
1297static int __initdata prom_rtas_start_cpu;
1298static u64 __initdata prom_rtas_data;
1299static u64 __initdata prom_rtas_entry;
1300
1301#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
1302static u64 __initdata prom_opal_base;
1303static u64 __initdata prom_opal_entry;
1304#endif
1305
1306/* XXX Don't change this structure without updating opal-takeover.S */
1307static struct opal_secondary_data {
1308 s64 ack; /* 0 */
1309 u64 go; /* 8 */
1310 struct opal_takeover_args args; /* 16 */
1311} opal_secondary_data;
1312
1313extern char opal_secondary_entry;
1314
1315static void __init prom_query_opal(void)
1316{
1317 long rc;
1318
1319 /* We must not query for OPAL presence on a machine that
1320 * supports TNK takeover (970 blades), as this uses the same
1321 * h-call with different arguments and will crash
1322 */
1323 if (PHANDLE_VALID(call_prom("finddevice", 1, 1,
1324 ADDR("/tnk-memory-map")))) {
1325 prom_printf("TNK takeover detected, skipping OPAL check\n");
1326 return;
1327 }
1328
1329 prom_printf("Querying for OPAL presence... ");
1330 rc = opal_query_takeover(&RELOC(prom_opal_size),
1331 &RELOC(prom_opal_align));
1332 prom_debug("(rc = %ld) ", rc);
1333 if (rc != 0) {
1334 prom_printf("not there.\n");
1335 return;
1336 }
1337 RELOC(of_platform) = PLATFORM_OPAL;
1338 prom_printf(" there !\n");
1339 prom_debug(" opal_size = 0x%lx\n", RELOC(prom_opal_size));
1340 prom_debug(" opal_align = 0x%lx\n", RELOC(prom_opal_align));
1341 if (RELOC(prom_opal_align) < 0x10000)
1342 RELOC(prom_opal_align) = 0x10000;
1343}
1344
1345static int prom_rtas_call(int token, int nargs, int nret, int *outputs, ...)
1346{
1347 struct rtas_args rtas_args;
1348 va_list list;
1349 int i;
1350
1351 rtas_args.token = token;
1352 rtas_args.nargs = nargs;
1353 rtas_args.nret = nret;
1354 rtas_args.rets = (rtas_arg_t *)&(rtas_args.args[nargs]);
1355 va_start(list, outputs);
1356 for (i = 0; i < nargs; ++i)
1357 rtas_args.args[i] = va_arg(list, rtas_arg_t);
1358 va_end(list);
1359
1360 for (i = 0; i < nret; ++i)
1361 rtas_args.rets[i] = 0;
1362
1363 opal_enter_rtas(&rtas_args, RELOC(prom_rtas_data),
1364 RELOC(prom_rtas_entry));
1365
1366 if (nret > 1 && outputs != NULL)
1367 for (i = 0; i < nret-1; ++i)
1368 outputs[i] = rtas_args.rets[i+1];
1369 return (nret > 0)? rtas_args.rets[0]: 0;
1370}
1371
1372static void __init prom_opal_hold_cpus(void)
1373{
1374 int i, cnt, cpu, rc;
1375 long j;
1376 phandle node;
1377 char type[64];
1378 u32 servers[8];
1379 struct prom_t *_prom = &RELOC(prom);
1380 void *entry = (unsigned long *)&RELOC(opal_secondary_entry);
1381 struct opal_secondary_data *data = &RELOC(opal_secondary_data);
1382
1383 prom_debug("prom_opal_hold_cpus: start...\n");
1384 prom_debug(" - entry = 0x%x\n", entry);
1385 prom_debug(" - data = 0x%x\n", data);
1386
1387 data->ack = -1;
1388 data->go = 0;
1389
1390 /* look for cpus */
1391 for (node = 0; prom_next_node(&node); ) {
1392 type[0] = 0;
1393 prom_getprop(node, "device_type", type, sizeof(type));
1394 if (strcmp(type, RELOC("cpu")) != 0)
1395 continue;
1396
1397 /* Skip non-configured cpus. */
1398 if (prom_getprop(node, "status", type, sizeof(type)) > 0)
1399 if (strcmp(type, RELOC("okay")) != 0)
1400 continue;
1401
1402 cnt = prom_getprop(node, "ibm,ppc-interrupt-server#s", servers,
1403 sizeof(servers));
1404 if (cnt == PROM_ERROR)
1405 break;
1406 cnt >>= 2;
1407 for (i = 0; i < cnt; i++) {
1408 cpu = servers[i];
1409 prom_debug("CPU %d ... ", cpu);
1410 if (cpu == _prom->cpu) {
1411 prom_debug("booted !\n");
1412 continue;
1413 }
1414 prom_debug("starting ... ");
1415
1416 /* Init the acknowledge var which will be reset by
1417 * the secondary cpu when it awakens from its OF
1418 * spinloop.
1419 */
1420 data->ack = -1;
1421 rc = prom_rtas_call(RELOC(prom_rtas_start_cpu), 3, 1,
1422 NULL, cpu, entry, data);
1423 prom_debug("rtas rc=%d ...", rc);
1424
1425 for (j = 0; j < 100000000 && data->ack == -1; j++) {
1426 HMT_low();
1427 mb();
1428 }
1429 HMT_medium();
1430 if (data->ack != -1)
1431 prom_debug("done, PIR=0x%x\n", data->ack);
1432 else
1433 prom_debug("timeout !\n");
1434 }
1435 }
1436 prom_debug("prom_opal_hold_cpus: end...\n");
1437}
1438
1439static void __init prom_opal_takeover(void)
1440{
1441 struct opal_secondary_data *data = &RELOC(opal_secondary_data);
1442 struct opal_takeover_args *args = &data->args;
1443 u64 align = RELOC(prom_opal_align);
1444 u64 top_addr, opal_addr;
1445
1446 args->k_image = (u64)RELOC(_stext);
1447 args->k_size = _end - _stext;
1448 args->k_entry = 0;
1449 args->k_entry2 = 0x60;
1450
1451 top_addr = _ALIGN_UP(args->k_size, align);
1452
1453 if (RELOC(prom_initrd_start) != 0) {
1454 args->rd_image = RELOC(prom_initrd_start);
1455 args->rd_size = RELOC(prom_initrd_end) - args->rd_image;
1456 args->rd_loc = top_addr;
1457 top_addr = _ALIGN_UP(args->rd_loc + args->rd_size, align);
1458 }
1459
1460 /* Pickup an address for the HAL. We want to go really high
1461 * up to avoid problem with future kexecs. On the other hand
1462 * we don't want to be all over the TCEs on P5IOC2 machines
1463 * which are going to be up there too. We assume the machine
1464 * has plenty of memory, and we ask for the HAL for now to
1465 * be just below the 1G point, or above the initrd
1466 */
1467 opal_addr = _ALIGN_DOWN(0x40000000 - RELOC(prom_opal_size), align);
1468 if (opal_addr < top_addr)
1469 opal_addr = top_addr;
1470 args->hal_addr = opal_addr;
1471
1472 /* Copy the command line to the kernel image */
1473 strlcpy(RELOC(boot_command_line), RELOC(prom_cmd_line),
1474 COMMAND_LINE_SIZE);
1475
1476 prom_debug(" k_image = 0x%lx\n", args->k_image);
1477 prom_debug(" k_size = 0x%lx\n", args->k_size);
1478 prom_debug(" k_entry = 0x%lx\n", args->k_entry);
1479 prom_debug(" k_entry2 = 0x%lx\n", args->k_entry2);
1480 prom_debug(" hal_addr = 0x%lx\n", args->hal_addr);
1481 prom_debug(" rd_image = 0x%lx\n", args->rd_image);
1482 prom_debug(" rd_size = 0x%lx\n", args->rd_size);
1483 prom_debug(" rd_loc = 0x%lx\n", args->rd_loc);
1484 prom_printf("Performing OPAL takeover,this can take a few minutes..\n");
1485 prom_close_stdin();
1486 mb();
1487 data->go = 1;
1488 for (;;)
1489 opal_do_takeover(args);
1490}
1491
1492/*
1493 * Allocate room for and instantiate OPAL
1494 */
1495static void __init prom_instantiate_opal(void)
1496{
1497 phandle opal_node;
1498 ihandle opal_inst;
1499 u64 base, entry;
1500 u64 size = 0, align = 0x10000;
1501 u32 rets[2];
1502
1503 prom_debug("prom_instantiate_opal: start...\n");
1504
1505 opal_node = call_prom("finddevice", 1, 1, ADDR("/ibm,opal"));
1506 prom_debug("opal_node: %x\n", opal_node);
1507 if (!PHANDLE_VALID(opal_node))
1508 return;
1509
1510 prom_getprop(opal_node, "opal-runtime-size", &size, sizeof(size));
1511 if (size == 0)
1512 return;
1513 prom_getprop(opal_node, "opal-runtime-alignment", &align,
1514 sizeof(align));
1515
1516 base = alloc_down(size, align, 0);
1517 if (base == 0) {
1518 prom_printf("OPAL allocation failed !\n");
1519 return;
1520 }
1521
1522 opal_inst = call_prom("open", 1, 1, ADDR("/ibm,opal"));
1523 if (!IHANDLE_VALID(opal_inst)) {
1524 prom_printf("opening opal package failed (%x)\n", opal_inst);
1525 return;
1526 }
1527
1528 prom_printf("instantiating opal at 0x%x...", base);
1529
1530 if (call_prom_ret("call-method", 4, 3, rets,
1531 ADDR("load-opal-runtime"),
1532 opal_inst,
1533 base >> 32, base & 0xffffffff) != 0
1534 || (rets[0] == 0 && rets[1] == 0)) {
1535 prom_printf(" failed\n");
1536 return;
1537 }
1538 entry = (((u64)rets[0]) << 32) | rets[1];
1539
1540 prom_printf(" done\n");
1541
1542 reserve_mem(base, size);
1543
1544 prom_debug("opal base = 0x%x\n", base);
1545 prom_debug("opal align = 0x%x\n", align);
1546 prom_debug("opal entry = 0x%x\n", entry);
1547 prom_debug("opal size = 0x%x\n", (long)size);
1548
1549 prom_setprop(opal_node, "/ibm,opal", "opal-base-address",
1550 &base, sizeof(base));
1551 prom_setprop(opal_node, "/ibm,opal", "opal-entry-address",
1552 &entry, sizeof(entry));
1553
1554#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
1555 RELOC(prom_opal_base) = base;
1556 RELOC(prom_opal_entry) = entry;
1557#endif
1558 prom_debug("prom_instantiate_opal: end...\n");
1559}
1560
1561#endif /* CONFIG_PPC_POWERNV */
1562
1563/*
1564 * Allocate room for and instantiate RTAS
1565 */
1566static void __init prom_instantiate_rtas(void)
1567{
1568 phandle rtas_node;
1569 ihandle rtas_inst;
1570 u32 base, entry = 0;
1571 u32 size = 0;
1572
1573 prom_debug("prom_instantiate_rtas: start...\n");
1574
1575 rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
1576 prom_debug("rtas_node: %x\n", rtas_node);
1577 if (!PHANDLE_VALID(rtas_node))
1578 return;
1579
1580 prom_getprop(rtas_node, "rtas-size", &size, sizeof(size));
1581 if (size == 0)
1582 return;
1583
1584 base = alloc_down(size, PAGE_SIZE, 0);
1585 if (base == 0)
1586 prom_panic("Could not allocate memory for RTAS\n");
1587
1588 rtas_inst = call_prom("open", 1, 1, ADDR("/rtas"));
1589 if (!IHANDLE_VALID(rtas_inst)) {
1590 prom_printf("opening rtas package failed (%x)\n", rtas_inst);
1591 return;
1592 }
1593
1594 prom_printf("instantiating rtas at 0x%x...", base);
1595
1596 if (call_prom_ret("call-method", 3, 2, &entry,
1597 ADDR("instantiate-rtas"),
1598 rtas_inst, base) != 0
1599 || entry == 0) {
1600 prom_printf(" failed\n");
1601 return;
1602 }
1603 prom_printf(" done\n");
1604
1605 reserve_mem(base, size);
1606
1607 prom_setprop(rtas_node, "/rtas", "linux,rtas-base",
1608 &base, sizeof(base));
1609 prom_setprop(rtas_node, "/rtas", "linux,rtas-entry",
1610 &entry, sizeof(entry));
1611
1612#ifdef CONFIG_PPC_POWERNV
1613 /* PowerVN takeover hack */
1614 RELOC(prom_rtas_data) = base;
1615 RELOC(prom_rtas_entry) = entry;
1616 prom_getprop(rtas_node, "start-cpu", &RELOC(prom_rtas_start_cpu), 4);
1617#endif
1618 prom_debug("rtas base = 0x%x\n", base);
1619 prom_debug("rtas entry = 0x%x\n", entry);
1620 prom_debug("rtas size = 0x%x\n", (long)size);
1621
1622 prom_debug("prom_instantiate_rtas: end...\n");
1623}
1624
1625#ifdef CONFIG_PPC64
1626/*
1627 * Allocate room for and initialize TCE tables
1628 */
1629static void __init prom_initialize_tce_table(void)
1630{
1631 phandle node;
1632 ihandle phb_node;
1633 char compatible[64], type[64], model[64];
1634 char *path = RELOC(prom_scratch);
1635 u64 base, align;
1636 u32 minalign, minsize;
1637 u64 tce_entry, *tce_entryp;
1638 u64 local_alloc_top, local_alloc_bottom;
1639 u64 i;
1640
1641 if (RELOC(prom_iommu_off))
1642 return;
1643
1644 prom_debug("starting prom_initialize_tce_table\n");
1645
1646 /* Cache current top of allocs so we reserve a single block */
1647 local_alloc_top = RELOC(alloc_top_high);
1648 local_alloc_bottom = local_alloc_top;
1649
1650 /* Search all nodes looking for PHBs. */
1651 for (node = 0; prom_next_node(&node); ) {
1652 compatible[0] = 0;
1653 type[0] = 0;
1654 model[0] = 0;
1655 prom_getprop(node, "compatible",
1656 compatible, sizeof(compatible));
1657 prom_getprop(node, "device_type", type, sizeof(type));
1658 prom_getprop(node, "model", model, sizeof(model));
1659
1660 if ((type[0] == 0) || (strstr(type, RELOC("pci")) == NULL))
1661 continue;
1662
1663 /* Keep the old logic intact to avoid regression. */
1664 if (compatible[0] != 0) {
1665 if ((strstr(compatible, RELOC("python")) == NULL) &&
1666 (strstr(compatible, RELOC("Speedwagon")) == NULL) &&
1667 (strstr(compatible, RELOC("Winnipeg")) == NULL))
1668 continue;
1669 } else if (model[0] != 0) {
1670 if ((strstr(model, RELOC("ython")) == NULL) &&
1671 (strstr(model, RELOC("peedwagon")) == NULL) &&
1672 (strstr(model, RELOC("innipeg")) == NULL))
1673 continue;
1674 }
1675
1676 if (prom_getprop(node, "tce-table-minalign", &minalign,
1677 sizeof(minalign)) == PROM_ERROR)
1678 minalign = 0;
1679 if (prom_getprop(node, "tce-table-minsize", &minsize,
1680 sizeof(minsize)) == PROM_ERROR)
1681 minsize = 4UL << 20;
1682
1683 /*
1684 * Even though we read what OF wants, we just set the table
1685 * size to 4 MB. This is enough to map 2GB of PCI DMA space.
1686 * By doing this, we avoid the pitfalls of trying to DMA to
1687 * MMIO space and the DMA alias hole.
1688 *
1689 * On POWER4, firmware sets the TCE region by assuming
1690 * each TCE table is 8MB. Using this memory for anything
1691 * else will impact performance, so we always allocate 8MB.
1692 * Anton
1693 */
1694 if (__is_processor(PV_POWER4) || __is_processor(PV_POWER4p))
1695 minsize = 8UL << 20;
1696 else
1697 minsize = 4UL << 20;
1698
1699 /* Align to the greater of the align or size */
1700 align = max(minalign, minsize);
1701 base = alloc_down(minsize, align, 1);
1702 if (base == 0)
1703 prom_panic("ERROR, cannot find space for TCE table.\n");
1704 if (base < local_alloc_bottom)
1705 local_alloc_bottom = base;
1706
1707 /* It seems OF doesn't null-terminate the path :-( */
1708 memset(path, 0, PROM_SCRATCH_SIZE);
1709 /* Call OF to setup the TCE hardware */
1710 if (call_prom("package-to-path", 3, 1, node,
1711 path, PROM_SCRATCH_SIZE-1) == PROM_ERROR) {
1712 prom_printf("package-to-path failed\n");
1713 }
1714
1715 /* Save away the TCE table attributes for later use. */
1716 prom_setprop(node, path, "linux,tce-base", &base, sizeof(base));
1717 prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize));
1718
1719 prom_debug("TCE table: %s\n", path);
1720 prom_debug("\tnode = 0x%x\n", node);
1721 prom_debug("\tbase = 0x%x\n", base);
1722 prom_debug("\tsize = 0x%x\n", minsize);
1723
1724 /* Initialize the table to have a one-to-one mapping
1725 * over the allocated size.
1726 */
1727 tce_entryp = (u64 *)base;
1728 for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) {
1729 tce_entry = (i << PAGE_SHIFT);
1730 tce_entry |= 0x3;
1731 *tce_entryp = tce_entry;
1732 }
1733
1734 prom_printf("opening PHB %s", path);
1735 phb_node = call_prom("open", 1, 1, path);
1736 if (phb_node == 0)
1737 prom_printf("... failed\n");
1738 else
1739 prom_printf("... done\n");
1740
1741 call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"),
1742 phb_node, -1, minsize,
1743 (u32) base, (u32) (base >> 32));
1744 call_prom("close", 1, 0, phb_node);
1745 }
1746
1747 reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom);
1748
1749 /* These are only really needed if there is a memory limit in
1750 * effect, but we don't know so export them always. */
1751 RELOC(prom_tce_alloc_start) = local_alloc_bottom;
1752 RELOC(prom_tce_alloc_end) = local_alloc_top;
1753
1754 /* Flag the first invalid entry */
1755 prom_debug("ending prom_initialize_tce_table\n");
1756}
1757#endif
1758
1759/*
1760 * With CHRP SMP we need to use the OF to start the other processors.
1761 * We can't wait until smp_boot_cpus (the OF is trashed by then)
1762 * so we have to put the processors into a holding pattern controlled
1763 * by the kernel (not OF) before we destroy the OF.
1764 *
1765 * This uses a chunk of low memory, puts some holding pattern
1766 * code there and sends the other processors off to there until
1767 * smp_boot_cpus tells them to do something. The holding pattern
1768 * checks that address until its cpu # is there, when it is that
1769 * cpu jumps to __secondary_start(). smp_boot_cpus() takes care
1770 * of setting those values.
1771 *
1772 * We also use physical address 0x4 here to tell when a cpu
1773 * is in its holding pattern code.
1774 *
1775 * -- Cort
1776 */
1777/*
1778 * We want to reference the copy of __secondary_hold_* in the
1779 * 0 - 0x100 address range
1780 */
1781#define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff)
1782
1783static void __init prom_hold_cpus(void)
1784{
1785 unsigned long i;
1786 unsigned int reg;
1787 phandle node;
1788 char type[64];
1789 struct prom_t *_prom = &RELOC(prom);
1790 unsigned long *spinloop
1791 = (void *) LOW_ADDR(__secondary_hold_spinloop);
1792 unsigned long *acknowledge
1793 = (void *) LOW_ADDR(__secondary_hold_acknowledge);
1794 unsigned long secondary_hold = LOW_ADDR(__secondary_hold);
1795
1796 prom_debug("prom_hold_cpus: start...\n");
1797 prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop);
1798 prom_debug(" 1) *spinloop = 0x%x\n", *spinloop);
1799 prom_debug(" 1) acknowledge = 0x%x\n",
1800 (unsigned long)acknowledge);
1801 prom_debug(" 1) *acknowledge = 0x%x\n", *acknowledge);
1802 prom_debug(" 1) secondary_hold = 0x%x\n", secondary_hold);
1803
1804 /* Set the common spinloop variable, so all of the secondary cpus
1805 * will block when they are awakened from their OF spinloop.
1806 * This must occur for both SMP and non SMP kernels, since OF will
1807 * be trashed when we move the kernel.
1808 */
1809 *spinloop = 0;
1810
1811 /* look for cpus */
1812 for (node = 0; prom_next_node(&node); ) {
1813 type[0] = 0;
1814 prom_getprop(node, "device_type", type, sizeof(type));
1815 if (strcmp(type, RELOC("cpu")) != 0)
1816 continue;
1817
1818 /* Skip non-configured cpus. */
1819 if (prom_getprop(node, "status", type, sizeof(type)) > 0)
1820 if (strcmp(type, RELOC("okay")) != 0)
1821 continue;
1822
1823 reg = -1;
1824 prom_getprop(node, "reg", ®, sizeof(reg));
1825
1826 prom_debug("cpu hw idx = %lu\n", reg);
1827
1828 /* Init the acknowledge var which will be reset by
1829 * the secondary cpu when it awakens from its OF
1830 * spinloop.
1831 */
1832 *acknowledge = (unsigned long)-1;
1833
1834 if (reg != _prom->cpu) {
1835 /* Primary Thread of non-boot cpu or any thread */
1836 prom_printf("starting cpu hw idx %lu... ", reg);
1837 call_prom("start-cpu", 3, 0, node,
1838 secondary_hold, reg);
1839
1840 for (i = 0; (i < 100000000) &&
1841 (*acknowledge == ((unsigned long)-1)); i++ )
1842 mb();
1843
1844 if (*acknowledge == reg)
1845 prom_printf("done\n");
1846 else
1847 prom_printf("failed: %x\n", *acknowledge);
1848 }
1849#ifdef CONFIG_SMP
1850 else
1851 prom_printf("boot cpu hw idx %lu\n", reg);
1852#endif /* CONFIG_SMP */
1853 }
1854
1855 prom_debug("prom_hold_cpus: end...\n");
1856}
1857
1858
1859static void __init prom_init_client_services(unsigned long pp)
1860{
1861 struct prom_t *_prom = &RELOC(prom);
1862
1863 /* Get a handle to the prom entry point before anything else */
1864 RELOC(prom_entry) = pp;
1865
1866 /* get a handle for the stdout device */
1867 _prom->chosen = call_prom("finddevice", 1, 1, ADDR("/chosen"));
1868 if (!PHANDLE_VALID(_prom->chosen))
1869 prom_panic("cannot find chosen"); /* msg won't be printed :( */
1870
1871 /* get device tree root */
1872 _prom->root = call_prom("finddevice", 1, 1, ADDR("/"));
1873 if (!PHANDLE_VALID(_prom->root))
1874 prom_panic("cannot find device tree root"); /* msg won't be printed :( */
1875
1876 _prom->mmumap = 0;
1877}
1878
1879#ifdef CONFIG_PPC32
1880/*
1881 * For really old powermacs, we need to map things we claim.
1882 * For that, we need the ihandle of the mmu.
1883 * Also, on the longtrail, we need to work around other bugs.
1884 */
1885static void __init prom_find_mmu(void)
1886{
1887 struct prom_t *_prom = &RELOC(prom);
1888 phandle oprom;
1889 char version[64];
1890
1891 oprom = call_prom("finddevice", 1, 1, ADDR("/openprom"));
1892 if (!PHANDLE_VALID(oprom))
1893 return;
1894 if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0)
1895 return;
1896 version[sizeof(version) - 1] = 0;
1897 /* XXX might need to add other versions here */
1898 if (strcmp(version, "Open Firmware, 1.0.5") == 0)
1899 of_workarounds = OF_WA_CLAIM;
1900 else if (strncmp(version, "FirmWorks,3.", 12) == 0) {
1901 of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL;
1902 call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim");
1903 } else
1904 return;
1905 _prom->memory = call_prom("open", 1, 1, ADDR("/memory"));
1906 prom_getprop(_prom->chosen, "mmu", &_prom->mmumap,
1907 sizeof(_prom->mmumap));
1908 if (!IHANDLE_VALID(_prom->memory) || !IHANDLE_VALID(_prom->mmumap))
1909 of_workarounds &= ~OF_WA_CLAIM; /* hmmm */
1910}
1911#else
1912#define prom_find_mmu()
1913#endif
1914
1915static void __init prom_init_stdout(void)
1916{
1917 struct prom_t *_prom = &RELOC(prom);
1918 char *path = RELOC(of_stdout_device);
1919 char type[16];
1920 u32 val;
1921
1922 if (prom_getprop(_prom->chosen, "stdout", &val, sizeof(val)) <= 0)
1923 prom_panic("cannot find stdout");
1924
1925 _prom->stdout = val;
1926
1927 /* Get the full OF pathname of the stdout device */
1928 memset(path, 0, 256);
1929 call_prom("instance-to-path", 3, 1, _prom->stdout, path, 255);
1930 val = call_prom("instance-to-package", 1, 1, _prom->stdout);
1931 prom_setprop(_prom->chosen, "/chosen", "linux,stdout-package",
1932 &val, sizeof(val));
1933 prom_printf("OF stdout device is: %s\n", RELOC(of_stdout_device));
1934 prom_setprop(_prom->chosen, "/chosen", "linux,stdout-path",
1935 path, strlen(path) + 1);
1936
1937 /* If it's a display, note it */
1938 memset(type, 0, sizeof(type));
1939 prom_getprop(val, "device_type", type, sizeof(type));
1940 if (strcmp(type, RELOC("display")) == 0)
1941 prom_setprop(val, path, "linux,boot-display", NULL, 0);
1942}
1943
1944static int __init prom_find_machine_type(void)
1945{
1946 struct prom_t *_prom = &RELOC(prom);
1947 char compat[256];
1948 int len, i = 0;
1949#ifdef CONFIG_PPC64
1950 phandle rtas;
1951 int x;
1952#endif
1953
1954 /* Look for a PowerMac or a Cell */
1955 len = prom_getprop(_prom->root, "compatible",
1956 compat, sizeof(compat)-1);
1957 if (len > 0) {
1958 compat[len] = 0;
1959 while (i < len) {
1960 char *p = &compat[i];
1961 int sl = strlen(p);
1962 if (sl == 0)
1963 break;
1964 if (strstr(p, RELOC("Power Macintosh")) ||
1965 strstr(p, RELOC("MacRISC")))
1966 return PLATFORM_POWERMAC;
1967#ifdef CONFIG_PPC64
1968 /* We must make sure we don't detect the IBM Cell
1969 * blades as pSeries due to some firmware issues,
1970 * so we do it here.
1971 */
1972 if (strstr(p, RELOC("IBM,CBEA")) ||
1973 strstr(p, RELOC("IBM,CPBW-1.0")))
1974 return PLATFORM_GENERIC;
1975#endif /* CONFIG_PPC64 */
1976 i += sl + 1;
1977 }
1978 }
1979#ifdef CONFIG_PPC64
1980 /* Try to detect OPAL */
1981 if (PHANDLE_VALID(call_prom("finddevice", 1, 1, ADDR("/ibm,opal"))))
1982 return PLATFORM_OPAL;
1983
1984 /* Try to figure out if it's an IBM pSeries or any other
1985 * PAPR compliant platform. We assume it is if :
1986 * - /device_type is "chrp" (please, do NOT use that for future
1987 * non-IBM designs !
1988 * - it has /rtas
1989 */
1990 len = prom_getprop(_prom->root, "device_type",
1991 compat, sizeof(compat)-1);
1992 if (len <= 0)
1993 return PLATFORM_GENERIC;
1994 if (strcmp(compat, RELOC("chrp")))
1995 return PLATFORM_GENERIC;
1996
1997 /* Default to pSeries. We need to know if we are running LPAR */
1998 rtas = call_prom("finddevice", 1, 1, ADDR("/rtas"));
1999 if (!PHANDLE_VALID(rtas))
2000 return PLATFORM_GENERIC;
2001 x = prom_getproplen(rtas, "ibm,hypertas-functions");
2002 if (x != PROM_ERROR) {
2003 prom_debug("Hypertas detected, assuming LPAR !\n");
2004 return PLATFORM_PSERIES_LPAR;
2005 }
2006 return PLATFORM_PSERIES;
2007#else
2008 return PLATFORM_GENERIC;
2009#endif
2010}
2011
2012static int __init prom_set_color(ihandle ih, int i, int r, int g, int b)
2013{
2014 return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r);
2015}
2016
2017/*
2018 * If we have a display that we don't know how to drive,
2019 * we will want to try to execute OF's open method for it
2020 * later. However, OF will probably fall over if we do that
2021 * we've taken over the MMU.
2022 * So we check whether we will need to open the display,
2023 * and if so, open it now.
2024 */
2025static void __init prom_check_displays(void)
2026{
2027 char type[16], *path;
2028 phandle node;
2029 ihandle ih;
2030 int i;
2031
2032 static unsigned char default_colors[] = {
2033 0x00, 0x00, 0x00,
2034 0x00, 0x00, 0xaa,
2035 0x00, 0xaa, 0x00,
2036 0x00, 0xaa, 0xaa,
2037 0xaa, 0x00, 0x00,
2038 0xaa, 0x00, 0xaa,
2039 0xaa, 0xaa, 0x00,
2040 0xaa, 0xaa, 0xaa,
2041 0x55, 0x55, 0x55,
2042 0x55, 0x55, 0xff,
2043 0x55, 0xff, 0x55,
2044 0x55, 0xff, 0xff,
2045 0xff, 0x55, 0x55,
2046 0xff, 0x55, 0xff,
2047 0xff, 0xff, 0x55,
2048 0xff, 0xff, 0xff
2049 };
2050 const unsigned char *clut;
2051
2052 prom_debug("Looking for displays\n");
2053 for (node = 0; prom_next_node(&node); ) {
2054 memset(type, 0, sizeof(type));
2055 prom_getprop(node, "device_type", type, sizeof(type));
2056 if (strcmp(type, RELOC("display")) != 0)
2057 continue;
2058
2059 /* It seems OF doesn't null-terminate the path :-( */
2060 path = RELOC(prom_scratch);
2061 memset(path, 0, PROM_SCRATCH_SIZE);
2062
2063 /*
2064 * leave some room at the end of the path for appending extra
2065 * arguments
2066 */
2067 if (call_prom("package-to-path", 3, 1, node, path,
2068 PROM_SCRATCH_SIZE-10) == PROM_ERROR)
2069 continue;
2070 prom_printf("found display : %s, opening... ", path);
2071
2072 ih = call_prom("open", 1, 1, path);
2073 if (ih == 0) {
2074 prom_printf("failed\n");
2075 continue;
2076 }
2077
2078 /* Success */
2079 prom_printf("done\n");
2080 prom_setprop(node, path, "linux,opened", NULL, 0);
2081
2082 /* Setup a usable color table when the appropriate
2083 * method is available. Should update this to set-colors */
2084 clut = RELOC(default_colors);
2085 for (i = 0; i < 16; i++, clut += 3)
2086 if (prom_set_color(ih, i, clut[0], clut[1],
2087 clut[2]) != 0)
2088 break;
2089
2090#ifdef CONFIG_LOGO_LINUX_CLUT224
2091 clut = PTRRELOC(RELOC(logo_linux_clut224.clut));
2092 for (i = 0; i < RELOC(logo_linux_clut224.clutsize); i++, clut += 3)
2093 if (prom_set_color(ih, i + 32, clut[0], clut[1],
2094 clut[2]) != 0)
2095 break;
2096#endif /* CONFIG_LOGO_LINUX_CLUT224 */
2097 }
2098}
2099
2100
2101/* Return (relocated) pointer to this much memory: moves initrd if reqd. */
2102static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end,
2103 unsigned long needed, unsigned long align)
2104{
2105 void *ret;
2106
2107 *mem_start = _ALIGN(*mem_start, align);
2108 while ((*mem_start + needed) > *mem_end) {
2109 unsigned long room, chunk;
2110
2111 prom_debug("Chunk exhausted, claiming more at %x...\n",
2112 RELOC(alloc_bottom));
2113 room = RELOC(alloc_top) - RELOC(alloc_bottom);
2114 if (room > DEVTREE_CHUNK_SIZE)
2115 room = DEVTREE_CHUNK_SIZE;
2116 if (room < PAGE_SIZE)
2117 prom_panic("No memory for flatten_device_tree "
2118 "(no room)\n");
2119 chunk = alloc_up(room, 0);
2120 if (chunk == 0)
2121 prom_panic("No memory for flatten_device_tree "
2122 "(claim failed)\n");
2123 *mem_end = chunk + room;
2124 }
2125
2126 ret = (void *)*mem_start;
2127 *mem_start += needed;
2128
2129 return ret;
2130}
2131
2132#define dt_push_token(token, mem_start, mem_end) \
2133 do { *((u32 *)make_room(mem_start, mem_end, 4, 4)) = token; } while(0)
2134
2135static unsigned long __init dt_find_string(char *str)
2136{
2137 char *s, *os;
2138
2139 s = os = (char *)RELOC(dt_string_start);
2140 s += 4;
2141 while (s < (char *)RELOC(dt_string_end)) {
2142 if (strcmp(s, str) == 0)
2143 return s - os;
2144 s += strlen(s) + 1;
2145 }
2146 return 0;
2147}
2148
2149/*
2150 * The Open Firmware 1275 specification states properties must be 31 bytes or
2151 * less, however not all firmwares obey this. Make it 64 bytes to be safe.
2152 */
2153#define MAX_PROPERTY_NAME 64
2154
2155static void __init scan_dt_build_strings(phandle node,
2156 unsigned long *mem_start,
2157 unsigned long *mem_end)
2158{
2159 char *prev_name, *namep, *sstart;
2160 unsigned long soff;
2161 phandle child;
2162
2163 sstart = (char *)RELOC(dt_string_start);
2164
2165 /* get and store all property names */
2166 prev_name = RELOC("");
2167 for (;;) {
2168 /* 64 is max len of name including nul. */
2169 namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1);
2170 if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) {
2171 /* No more nodes: unwind alloc */
2172 *mem_start = (unsigned long)namep;
2173 break;
2174 }
2175
2176 /* skip "name" */
2177 if (strcmp(namep, RELOC("name")) == 0) {
2178 *mem_start = (unsigned long)namep;
2179 prev_name = RELOC("name");
2180 continue;
2181 }
2182 /* get/create string entry */
2183 soff = dt_find_string(namep);
2184 if (soff != 0) {
2185 *mem_start = (unsigned long)namep;
2186 namep = sstart + soff;
2187 } else {
2188 /* Trim off some if we can */
2189 *mem_start = (unsigned long)namep + strlen(namep) + 1;
2190 RELOC(dt_string_end) = *mem_start;
2191 }
2192 prev_name = namep;
2193 }
2194
2195 /* do all our children */
2196 child = call_prom("child", 1, 1, node);
2197 while (child != 0) {
2198 scan_dt_build_strings(child, mem_start, mem_end);
2199 child = call_prom("peer", 1, 1, child);
2200 }
2201}
2202
2203static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
2204 unsigned long *mem_end)
2205{
2206 phandle child;
2207 char *namep, *prev_name, *sstart, *p, *ep, *lp, *path;
2208 unsigned long soff;
2209 unsigned char *valp;
2210 static char pname[MAX_PROPERTY_NAME];
2211 int l, room, has_phandle = 0;
2212
2213 dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end);
2214
2215 /* get the node's full name */
2216 namep = (char *)*mem_start;
2217 room = *mem_end - *mem_start;
2218 if (room > 255)
2219 room = 255;
2220 l = call_prom("package-to-path", 3, 1, node, namep, room);
2221 if (l >= 0) {
2222 /* Didn't fit? Get more room. */
2223 if (l >= room) {
2224 if (l >= *mem_end - *mem_start)
2225 namep = make_room(mem_start, mem_end, l+1, 1);
2226 call_prom("package-to-path", 3, 1, node, namep, l);
2227 }
2228 namep[l] = '\0';
2229
2230 /* Fixup an Apple bug where they have bogus \0 chars in the
2231 * middle of the path in some properties, and extract
2232 * the unit name (everything after the last '/').
2233 */
2234 for (lp = p = namep, ep = namep + l; p < ep; p++) {
2235 if (*p == '/')
2236 lp = namep;
2237 else if (*p != 0)
2238 *lp++ = *p;
2239 }
2240 *lp = 0;
2241 *mem_start = _ALIGN((unsigned long)lp + 1, 4);
2242 }
2243
2244 /* get it again for debugging */
2245 path = RELOC(prom_scratch);
2246 memset(path, 0, PROM_SCRATCH_SIZE);
2247 call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1);
2248
2249 /* get and store all properties */
2250 prev_name = RELOC("");
2251 sstart = (char *)RELOC(dt_string_start);
2252 for (;;) {
2253 if (call_prom("nextprop", 3, 1, node, prev_name,
2254 RELOC(pname)) != 1)
2255 break;
2256
2257 /* skip "name" */
2258 if (strcmp(RELOC(pname), RELOC("name")) == 0) {
2259 prev_name = RELOC("name");
2260 continue;
2261 }
2262
2263 /* find string offset */
2264 soff = dt_find_string(RELOC(pname));
2265 if (soff == 0) {
2266 prom_printf("WARNING: Can't find string index for"
2267 " <%s>, node %s\n", RELOC(pname), path);
2268 break;
2269 }
2270 prev_name = sstart + soff;
2271
2272 /* get length */
2273 l = call_prom("getproplen", 2, 1, node, RELOC(pname));
2274
2275 /* sanity checks */
2276 if (l == PROM_ERROR)
2277 continue;
2278
2279 /* push property head */
2280 dt_push_token(OF_DT_PROP, mem_start, mem_end);
2281 dt_push_token(l, mem_start, mem_end);
2282 dt_push_token(soff, mem_start, mem_end);
2283
2284 /* push property content */
2285 valp = make_room(mem_start, mem_end, l, 4);
2286 call_prom("getprop", 4, 1, node, RELOC(pname), valp, l);
2287 *mem_start = _ALIGN(*mem_start, 4);
2288
2289 if (!strcmp(RELOC(pname), RELOC("phandle")))
2290 has_phandle = 1;
2291 }
2292
2293 /* Add a "linux,phandle" property if no "phandle" property already
2294 * existed (can happen with OPAL)
2295 */
2296 if (!has_phandle) {
2297 soff = dt_find_string(RELOC("linux,phandle"));
2298 if (soff == 0)
2299 prom_printf("WARNING: Can't find string index for"
2300 " <linux-phandle> node %s\n", path);
2301 else {
2302 dt_push_token(OF_DT_PROP, mem_start, mem_end);
2303 dt_push_token(4, mem_start, mem_end);
2304 dt_push_token(soff, mem_start, mem_end);
2305 valp = make_room(mem_start, mem_end, 4, 4);
2306 *(u32 *)valp = node;
2307 }
2308 }
2309
2310 /* do all our children */
2311 child = call_prom("child", 1, 1, node);
2312 while (child != 0) {
2313 scan_dt_build_struct(child, mem_start, mem_end);
2314 child = call_prom("peer", 1, 1, child);
2315 }
2316
2317 dt_push_token(OF_DT_END_NODE, mem_start, mem_end);
2318}
2319
2320static void __init flatten_device_tree(void)
2321{
2322 phandle root;
2323 unsigned long mem_start, mem_end, room;
2324 struct boot_param_header *hdr;
2325 struct prom_t *_prom = &RELOC(prom);
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 = RELOC(alloc_top) - RELOC(alloc_bottom) - 0x4000;
2334 if (room > DEVTREE_CHUNK_SIZE)
2335 room = DEVTREE_CHUNK_SIZE;
2336 prom_debug("starting device tree allocs at %x\n", RELOC(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 RELOC(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 RELOC(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, RELOC("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 RELOC(dt_string_end) = mem_start;
2370
2371 /* Build structure */
2372 mem_start = PAGE_ALIGN(mem_start);
2373 RELOC(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 RELOC(dt_struct_end) = PAGE_ALIGN(mem_start);
2378
2379 /* Finish header */
2380 hdr->boot_cpuid_phys = _prom->cpu;
2381 hdr->magic = OF_DT_HEADER;
2382 hdr->totalsize = RELOC(dt_struct_end) - RELOC(dt_header_start);
2383 hdr->off_dt_struct = RELOC(dt_struct_start) - RELOC(dt_header_start);
2384 hdr->off_dt_strings = RELOC(dt_string_start) - RELOC(dt_header_start);
2385 hdr->dt_strings_size = RELOC(dt_string_end) - RELOC(dt_string_start);
2386 hdr->off_mem_rsvmap = ((unsigned long)rsvmap) - RELOC(dt_header_start);
2387 hdr->version = OF_DT_VERSION;
2388 /* Version 16 is not backward compatible */
2389 hdr->last_comp_version = 0x10;
2390
2391 /* Copy the reserve map in */
2392 memcpy(rsvmap, RELOC(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 < RELOC(mem_reserve_cnt); i++)
2399 prom_printf(" %x - %x\n",
2400 RELOC(mem_reserve_map)[i].base,
2401 RELOC(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 RELOC(mem_reserve_cnt) = MEM_RESERVE_MAP_SIZE;
2408
2409 prom_printf("Device tree strings 0x%x -> 0x%x\n",
2410 RELOC(dt_string_start), RELOC(dt_string_end));
2411 prom_printf("Device tree struct 0x%x -> 0x%x\n",
2412 RELOC(dt_struct_start), RELOC(dt_struct_end));
2413
2414}
2415
2416#ifdef CONFIG_PPC_MAPLE
2417/* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property.
2418 * The values are bad, and it doesn't even have the right number of cells. */
2419static void __init fixup_device_tree_maple(void)
2420{
2421 phandle isa;
2422 u32 rloc = 0x01002000; /* IO space; PCI device = 4 */
2423 u32 isa_ranges[6];
2424 char *name;
2425
2426 name = "/ht@0/isa@4";
2427 isa = call_prom("finddevice", 1, 1, ADDR(name));
2428 if (!PHANDLE_VALID(isa)) {
2429 name = "/ht@0/isa@6";
2430 isa = call_prom("finddevice", 1, 1, ADDR(name));
2431 rloc = 0x01003000; /* IO space; PCI device = 6 */
2432 }
2433 if (!PHANDLE_VALID(isa))
2434 return;
2435
2436 if (prom_getproplen(isa, "ranges") != 12)
2437 return;
2438 if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges))
2439 == PROM_ERROR)
2440 return;
2441
2442 if (isa_ranges[0] != 0x1 ||
2443 isa_ranges[1] != 0xf4000000 ||
2444 isa_ranges[2] != 0x00010000)
2445 return;
2446
2447 prom_printf("Fixing up bogus ISA range on Maple/Apache...\n");
2448
2449 isa_ranges[0] = 0x1;
2450 isa_ranges[1] = 0x0;
2451 isa_ranges[2] = rloc;
2452 isa_ranges[3] = 0x0;
2453 isa_ranges[4] = 0x0;
2454 isa_ranges[5] = 0x00010000;
2455 prom_setprop(isa, name, "ranges",
2456 isa_ranges, sizeof(isa_ranges));
2457}
2458
2459#define CPC925_MC_START 0xf8000000
2460#define CPC925_MC_LENGTH 0x1000000
2461/* The values for memory-controller don't have right number of cells */
2462static void __init fixup_device_tree_maple_memory_controller(void)
2463{
2464 phandle mc;
2465 u32 mc_reg[4];
2466 char *name = "/hostbridge@f8000000";
2467 struct prom_t *_prom = &RELOC(prom);
2468 u32 ac, sc;
2469
2470 mc = call_prom("finddevice", 1, 1, ADDR(name));
2471 if (!PHANDLE_VALID(mc))
2472 return;
2473
2474 if (prom_getproplen(mc, "reg") != 8)
2475 return;
2476
2477 prom_getprop(_prom->root, "#address-cells", &ac, sizeof(ac));
2478 prom_getprop(_prom->root, "#size-cells", &sc, sizeof(sc));
2479 if ((ac != 2) || (sc != 2))
2480 return;
2481
2482 if (prom_getprop(mc, "reg", mc_reg, sizeof(mc_reg)) == PROM_ERROR)
2483 return;
2484
2485 if (mc_reg[0] != CPC925_MC_START || mc_reg[1] != CPC925_MC_LENGTH)
2486 return;
2487
2488 prom_printf("Fixing up bogus hostbridge on Maple...\n");
2489
2490 mc_reg[0] = 0x0;
2491 mc_reg[1] = CPC925_MC_START;
2492 mc_reg[2] = 0x0;
2493 mc_reg[3] = CPC925_MC_LENGTH;
2494 prom_setprop(mc, name, "reg", mc_reg, sizeof(mc_reg));
2495}
2496#else
2497#define fixup_device_tree_maple()
2498#define fixup_device_tree_maple_memory_controller()
2499#endif
2500
2501#ifdef CONFIG_PPC_CHRP
2502/*
2503 * Pegasos and BriQ lacks the "ranges" property in the isa node
2504 * Pegasos needs decimal IRQ 14/15, not hexadecimal
2505 * Pegasos has the IDE configured in legacy mode, but advertised as native
2506 */
2507static void __init fixup_device_tree_chrp(void)
2508{
2509 phandle ph;
2510 u32 prop[6];
2511 u32 rloc = 0x01006000; /* IO space; PCI device = 12 */
2512 char *name;
2513 int rc;
2514
2515 name = "/pci@80000000/isa@c";
2516 ph = call_prom("finddevice", 1, 1, ADDR(name));
2517 if (!PHANDLE_VALID(ph)) {
2518 name = "/pci@ff500000/isa@6";
2519 ph = call_prom("finddevice", 1, 1, ADDR(name));
2520 rloc = 0x01003000; /* IO space; PCI device = 6 */
2521 }
2522 if (PHANDLE_VALID(ph)) {
2523 rc = prom_getproplen(ph, "ranges");
2524 if (rc == 0 || rc == PROM_ERROR) {
2525 prom_printf("Fixing up missing ISA range on Pegasos...\n");
2526
2527 prop[0] = 0x1;
2528 prop[1] = 0x0;
2529 prop[2] = rloc;
2530 prop[3] = 0x0;
2531 prop[4] = 0x0;
2532 prop[5] = 0x00010000;
2533 prom_setprop(ph, name, "ranges", prop, sizeof(prop));
2534 }
2535 }
2536
2537 name = "/pci@80000000/ide@C,1";
2538 ph = call_prom("finddevice", 1, 1, ADDR(name));
2539 if (PHANDLE_VALID(ph)) {
2540 prom_printf("Fixing up IDE interrupt on Pegasos...\n");
2541 prop[0] = 14;
2542 prop[1] = 0x0;
2543 prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32));
2544 prom_printf("Fixing up IDE class-code on Pegasos...\n");
2545 rc = prom_getprop(ph, "class-code", prop, sizeof(u32));
2546 if (rc == sizeof(u32)) {
2547 prop[0] &= ~0x5;
2548 prom_setprop(ph, name, "class-code", prop, sizeof(u32));
2549 }
2550 }
2551}
2552#else
2553#define fixup_device_tree_chrp()
2554#endif
2555
2556#if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)
2557static void __init fixup_device_tree_pmac(void)
2558{
2559 phandle u3, i2c, mpic;
2560 u32 u3_rev;
2561 u32 interrupts[2];
2562 u32 parent;
2563
2564 /* Some G5s have a missing interrupt definition, fix it up here */
2565 u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000"));
2566 if (!PHANDLE_VALID(u3))
2567 return;
2568 i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000"));
2569 if (!PHANDLE_VALID(i2c))
2570 return;
2571 mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000"));
2572 if (!PHANDLE_VALID(mpic))
2573 return;
2574
2575 /* check if proper rev of u3 */
2576 if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev))
2577 == PROM_ERROR)
2578 return;
2579 if (u3_rev < 0x35 || u3_rev > 0x39)
2580 return;
2581 /* does it need fixup ? */
2582 if (prom_getproplen(i2c, "interrupts") > 0)
2583 return;
2584
2585 prom_printf("fixing up bogus interrupts for u3 i2c...\n");
2586
2587 /* interrupt on this revision of u3 is number 0 and level */
2588 interrupts[0] = 0;
2589 interrupts[1] = 1;
2590 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts",
2591 &interrupts, sizeof(interrupts));
2592 parent = (u32)mpic;
2593 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent",
2594 &parent, sizeof(parent));
2595}
2596#else
2597#define fixup_device_tree_pmac()
2598#endif
2599
2600#ifdef CONFIG_PPC_EFIKA
2601/*
2602 * The MPC5200 FEC driver requires an phy-handle property to tell it how
2603 * to talk to the phy. If the phy-handle property is missing, then this
2604 * function is called to add the appropriate nodes and link it to the
2605 * ethernet node.
2606 */
2607static void __init fixup_device_tree_efika_add_phy(void)
2608{
2609 u32 node;
2610 char prop[64];
2611 int rv;
2612
2613 /* Check if /builtin/ethernet exists - bail if it doesn't */
2614 node = call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet"));
2615 if (!PHANDLE_VALID(node))
2616 return;
2617
2618 /* Check if the phy-handle property exists - bail if it does */
2619 rv = prom_getprop(node, "phy-handle", prop, sizeof(prop));
2620 if (!rv)
2621 return;
2622
2623 /*
2624 * At this point the ethernet device doesn't have a phy described.
2625 * Now we need to add the missing phy node and linkage
2626 */
2627
2628 /* Check for an MDIO bus node - if missing then create one */
2629 node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio"));
2630 if (!PHANDLE_VALID(node)) {
2631 prom_printf("Adding Ethernet MDIO node\n");
2632 call_prom("interpret", 1, 1,
2633 " s\" /builtin\" find-device"
2634 " new-device"
2635 " 1 encode-int s\" #address-cells\" property"
2636 " 0 encode-int s\" #size-cells\" property"
2637 " s\" mdio\" device-name"
2638 " s\" fsl,mpc5200b-mdio\" encode-string"
2639 " s\" compatible\" property"
2640 " 0xf0003000 0x400 reg"
2641 " 0x2 encode-int"
2642 " 0x5 encode-int encode+"
2643 " 0x3 encode-int encode+"
2644 " s\" interrupts\" property"
2645 " finish-device");
2646 };
2647
2648 /* Check for a PHY device node - if missing then create one and
2649 * give it's phandle to the ethernet node */
2650 node = call_prom("finddevice", 1, 1,
2651 ADDR("/builtin/mdio/ethernet-phy"));
2652 if (!PHANDLE_VALID(node)) {
2653 prom_printf("Adding Ethernet PHY node\n");
2654 call_prom("interpret", 1, 1,
2655 " s\" /builtin/mdio\" find-device"
2656 " new-device"
2657 " s\" ethernet-phy\" device-name"
2658 " 0x10 encode-int s\" reg\" property"
2659 " my-self"
2660 " ihandle>phandle"
2661 " finish-device"
2662 " s\" /builtin/ethernet\" find-device"
2663 " encode-int"
2664 " s\" phy-handle\" property"
2665 " device-end");
2666 }
2667}
2668
2669static void __init fixup_device_tree_efika(void)
2670{
2671 int sound_irq[3] = { 2, 2, 0 };
2672 int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0,
2673 3,4,0, 3,5,0, 3,6,0, 3,7,0,
2674 3,8,0, 3,9,0, 3,10,0, 3,11,0,
2675 3,12,0, 3,13,0, 3,14,0, 3,15,0 };
2676 u32 node;
2677 char prop[64];
2678 int rv, len;
2679
2680 /* Check if we're really running on a EFIKA */
2681 node = call_prom("finddevice", 1, 1, ADDR("/"));
2682 if (!PHANDLE_VALID(node))
2683 return;
2684
2685 rv = prom_getprop(node, "model", prop, sizeof(prop));
2686 if (rv == PROM_ERROR)
2687 return;
2688 if (strcmp(prop, "EFIKA5K2"))
2689 return;
2690
2691 prom_printf("Applying EFIKA device tree fixups\n");
2692
2693 /* Claiming to be 'chrp' is death */
2694 node = call_prom("finddevice", 1, 1, ADDR("/"));
2695 rv = prom_getprop(node, "device_type", prop, sizeof(prop));
2696 if (rv != PROM_ERROR && (strcmp(prop, "chrp") == 0))
2697 prom_setprop(node, "/", "device_type", "efika", sizeof("efika"));
2698
2699 /* CODEGEN,description is exposed in /proc/cpuinfo so
2700 fix that too */
2701 rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop));
2702 if (rv != PROM_ERROR && (strstr(prop, "CHRP")))
2703 prom_setprop(node, "/", "CODEGEN,description",
2704 "Efika 5200B PowerPC System",
2705 sizeof("Efika 5200B PowerPC System"));
2706
2707 /* Fixup bestcomm interrupts property */
2708 node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm"));
2709 if (PHANDLE_VALID(node)) {
2710 len = prom_getproplen(node, "interrupts");
2711 if (len == 12) {
2712 prom_printf("Fixing bestcomm interrupts property\n");
2713 prom_setprop(node, "/builtin/bestcom", "interrupts",
2714 bcomm_irq, sizeof(bcomm_irq));
2715 }
2716 }
2717
2718 /* Fixup sound interrupts property */
2719 node = call_prom("finddevice", 1, 1, ADDR("/builtin/sound"));
2720 if (PHANDLE_VALID(node)) {
2721 rv = prom_getprop(node, "interrupts", prop, sizeof(prop));
2722 if (rv == PROM_ERROR) {
2723 prom_printf("Adding sound interrupts property\n");
2724 prom_setprop(node, "/builtin/sound", "interrupts",
2725 sound_irq, sizeof(sound_irq));
2726 }
2727 }
2728
2729 /* Make sure ethernet phy-handle property exists */
2730 fixup_device_tree_efika_add_phy();
2731}
2732#else
2733#define fixup_device_tree_efika()
2734#endif
2735
2736static void __init fixup_device_tree(void)
2737{
2738 fixup_device_tree_maple();
2739 fixup_device_tree_maple_memory_controller();
2740 fixup_device_tree_chrp();
2741 fixup_device_tree_pmac();
2742 fixup_device_tree_efika();
2743}
2744
2745static void __init prom_find_boot_cpu(void)
2746{
2747 struct prom_t *_prom = &RELOC(prom);
2748 u32 getprop_rval;
2749 ihandle prom_cpu;
2750 phandle cpu_pkg;
2751
2752 _prom->cpu = 0;
2753 if (prom_getprop(_prom->chosen, "cpu", &prom_cpu, sizeof(prom_cpu)) <= 0)
2754 return;
2755
2756 cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu);
2757
2758 prom_getprop(cpu_pkg, "reg", &getprop_rval, sizeof(getprop_rval));
2759 _prom->cpu = getprop_rval;
2760
2761 prom_debug("Booting CPU hw index = %lu\n", _prom->cpu);
2762}
2763
2764static void __init prom_check_initrd(unsigned long r3, unsigned long r4)
2765{
2766#ifdef CONFIG_BLK_DEV_INITRD
2767 struct prom_t *_prom = &RELOC(prom);
2768
2769 if (r3 && r4 && r4 != 0xdeadbeef) {
2770 unsigned long val;
2771
2772 RELOC(prom_initrd_start) = is_kernel_addr(r3) ? __pa(r3) : r3;
2773 RELOC(prom_initrd_end) = RELOC(prom_initrd_start) + r4;
2774
2775 val = RELOC(prom_initrd_start);
2776 prom_setprop(_prom->chosen, "/chosen", "linux,initrd-start",
2777 &val, sizeof(val));
2778 val = RELOC(prom_initrd_end);
2779 prom_setprop(_prom->chosen, "/chosen", "linux,initrd-end",
2780 &val, sizeof(val));
2781
2782 reserve_mem(RELOC(prom_initrd_start),
2783 RELOC(prom_initrd_end) - RELOC(prom_initrd_start));
2784
2785 prom_debug("initrd_start=0x%x\n", RELOC(prom_initrd_start));
2786 prom_debug("initrd_end=0x%x\n", RELOC(prom_initrd_end));
2787 }
2788#endif /* CONFIG_BLK_DEV_INITRD */
2789}
2790
2791
2792/*
2793 * We enter here early on, when the Open Firmware prom is still
2794 * handling exceptions and the MMU hash table for us.
2795 */
2796
2797unsigned long __init prom_init(unsigned long r3, unsigned long r4,
2798 unsigned long pp,
2799 unsigned long r6, unsigned long r7,
2800 unsigned long kbase)
2801{
2802 struct prom_t *_prom;
2803 unsigned long hdr;
2804
2805#ifdef CONFIG_PPC32
2806 unsigned long offset = reloc_offset();
2807 reloc_got2(offset);
2808#endif
2809
2810 _prom = &RELOC(prom);
2811
2812 /*
2813 * First zero the BSS
2814 */
2815 memset(&RELOC(__bss_start), 0, __bss_stop - __bss_start);
2816
2817 /*
2818 * Init interface to Open Firmware, get some node references,
2819 * like /chosen
2820 */
2821 prom_init_client_services(pp);
2822
2823 /*
2824 * See if this OF is old enough that we need to do explicit maps
2825 * and other workarounds
2826 */
2827 prom_find_mmu();
2828
2829 /*
2830 * Init prom stdout device
2831 */
2832 prom_init_stdout();
2833
2834 prom_printf("Preparing to boot %s", RELOC(linux_banner));
2835
2836 /*
2837 * Get default machine type. At this point, we do not differentiate
2838 * between pSeries SMP and pSeries LPAR
2839 */
2840 RELOC(of_platform) = prom_find_machine_type();
2841 prom_printf("Detected machine type: %x\n", RELOC(of_platform));
2842
2843#ifndef CONFIG_NONSTATIC_KERNEL
2844 /* Bail if this is a kdump kernel. */
2845 if (PHYSICAL_START > 0)
2846 prom_panic("Error: You can't boot a kdump kernel from OF!\n");
2847#endif
2848
2849 /*
2850 * Check for an initrd
2851 */
2852 prom_check_initrd(r3, r4);
2853
2854#if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
2855 /*
2856 * On pSeries, inform the firmware about our capabilities
2857 */
2858 if (RELOC(of_platform) == PLATFORM_PSERIES ||
2859 RELOC(of_platform) == PLATFORM_PSERIES_LPAR)
2860 prom_send_capabilities();
2861#endif
2862
2863 /*
2864 * Copy the CPU hold code
2865 */
2866 if (RELOC(of_platform) != PLATFORM_POWERMAC)
2867 copy_and_flush(0, kbase, 0x100, 0);
2868
2869 /*
2870 * Do early parsing of command line
2871 */
2872 early_cmdline_parse();
2873
2874 /*
2875 * Initialize memory management within prom_init
2876 */
2877 prom_init_mem();
2878
2879 /*
2880 * Determine which cpu is actually running right _now_
2881 */
2882 prom_find_boot_cpu();
2883
2884 /*
2885 * Initialize display devices
2886 */
2887 prom_check_displays();
2888
2889#ifdef CONFIG_PPC64
2890 /*
2891 * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else
2892 * that uses the allocator, we need to make sure we get the top of memory
2893 * available for us here...
2894 */
2895 if (RELOC(of_platform) == PLATFORM_PSERIES)
2896 prom_initialize_tce_table();
2897#endif
2898
2899 /*
2900 * On non-powermacs, try to instantiate RTAS. PowerMacs don't
2901 * have a usable RTAS implementation.
2902 */
2903 if (RELOC(of_platform) != PLATFORM_POWERMAC &&
2904 RELOC(of_platform) != PLATFORM_OPAL)
2905 prom_instantiate_rtas();
2906
2907#ifdef CONFIG_PPC_POWERNV
2908 /* Detect HAL and try instanciating it & doing takeover */
2909 if (RELOC(of_platform) == PLATFORM_PSERIES_LPAR) {
2910 prom_query_opal();
2911 if (RELOC(of_platform) == PLATFORM_OPAL) {
2912 prom_opal_hold_cpus();
2913 prom_opal_takeover();
2914 }
2915 } else if (RELOC(of_platform) == PLATFORM_OPAL)
2916 prom_instantiate_opal();
2917#endif
2918
2919 /*
2920 * On non-powermacs, put all CPUs in spin-loops.
2921 *
2922 * PowerMacs use a different mechanism to spin CPUs
2923 */
2924 if (RELOC(of_platform) != PLATFORM_POWERMAC &&
2925 RELOC(of_platform) != PLATFORM_OPAL)
2926 prom_hold_cpus();
2927
2928 /*
2929 * Fill in some infos for use by the kernel later on
2930 */
2931 if (RELOC(prom_memory_limit))
2932 prom_setprop(_prom->chosen, "/chosen", "linux,memory-limit",
2933 &RELOC(prom_memory_limit),
2934 sizeof(prom_memory_limit));
2935#ifdef CONFIG_PPC64
2936 if (RELOC(prom_iommu_off))
2937 prom_setprop(_prom->chosen, "/chosen", "linux,iommu-off",
2938 NULL, 0);
2939
2940 if (RELOC(prom_iommu_force_on))
2941 prom_setprop(_prom->chosen, "/chosen", "linux,iommu-force-on",
2942 NULL, 0);
2943
2944 if (RELOC(prom_tce_alloc_start)) {
2945 prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-start",
2946 &RELOC(prom_tce_alloc_start),
2947 sizeof(prom_tce_alloc_start));
2948 prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-end",
2949 &RELOC(prom_tce_alloc_end),
2950 sizeof(prom_tce_alloc_end));
2951 }
2952#endif
2953
2954 /*
2955 * Fixup any known bugs in the device-tree
2956 */
2957 fixup_device_tree();
2958
2959 /*
2960 * Now finally create the flattened device-tree
2961 */
2962 prom_printf("copying OF device tree...\n");
2963 flatten_device_tree();
2964
2965 /*
2966 * in case stdin is USB and still active on IBM machines...
2967 * Unfortunately quiesce crashes on some powermacs if we have
2968 * closed stdin already (in particular the powerbook 101). It
2969 * appears that the OPAL version of OFW doesn't like it either.
2970 */
2971 if (RELOC(of_platform) != PLATFORM_POWERMAC &&
2972 RELOC(of_platform) != PLATFORM_OPAL)
2973 prom_close_stdin();
2974
2975 /*
2976 * Call OF "quiesce" method to shut down pending DMA's from
2977 * devices etc...
2978 */
2979 prom_printf("Calling quiesce...\n");
2980 call_prom("quiesce", 0, 0);
2981
2982 /*
2983 * And finally, call the kernel passing it the flattened device
2984 * tree and NULL as r5, thus triggering the new entry point which
2985 * is common to us and kexec
2986 */
2987 hdr = RELOC(dt_header_start);
2988
2989 /* Don't print anything after quiesce under OPAL, it crashes OFW */
2990 if (RELOC(of_platform) != PLATFORM_OPAL) {
2991 prom_printf("returning from prom_init\n");
2992 prom_debug("->dt_header_start=0x%x\n", hdr);
2993 }
2994
2995#ifdef CONFIG_PPC32
2996 reloc_got2(-offset);
2997#endif
2998
2999#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
3000 /* OPAL early debug gets the OPAL base & entry in r8 and r9 */
3001 __start(hdr, kbase, 0, 0, 0,
3002 RELOC(prom_opal_base), RELOC(prom_opal_entry));
3003#else
3004 __start(hdr, kbase, 0, 0, 0, 0, 0);
3005#endif
3006
3007 return 0;
3008}