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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris...
[linux/fpc-iii.git] / arch / powerpc / kernel / prom_init.c
blob078145acf7fb867dca6278f776a935ba0b2ecf25
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 * ppc64 objects are always relocatable, we just need to relocate the
70 * TOC.
71 *
72 * Because OF may have mapped I/O devices into the area starting at
73 * KERNELBASE, particularly on CHRP machines, we can't safely call
74 * OF once the kernel has been mapped to KERNELBASE. Therefore all
75 * OF calls must be done within prom_init().
76 *
77 * ADDR is used in calls to call_prom. The 4th and following
78 * arguments to call_prom should be 32-bit values.
79 * On ppc64, 64 bit values are truncated to 32 bits (and
80 * fortunately don't get interpreted as two arguments).
81 */
82 #define ADDR(x) (u32)(unsigned long)(x)
83
84 #ifdef CONFIG_PPC64
85 #define OF_WORKAROUNDS 0
86 #else
87 #define OF_WORKAROUNDS of_workarounds
88 int of_workarounds;
89 #endif
90
91 #define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */
92 #define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */
93
94 #define PROM_BUG() do { \
95 prom_printf("kernel BUG at %s line 0x%x!\n", \
96 __FILE__, __LINE__); \
97 __asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \
98 } while (0)
99
100 #ifdef DEBUG_PROM
101 #define prom_debug(x...) prom_printf(x)
102 #else
103 #define prom_debug(x...)
104 #endif
105
106
107 typedef u32 prom_arg_t;
108
109 struct prom_args {
110 __be32 service;
111 __be32 nargs;
112 __be32 nret;
113 __be32 args[10];
114 };
115
116 struct prom_t {
117 ihandle root;
118 phandle chosen;
119 int cpu;
120 ihandle stdout;
121 ihandle mmumap;
122 ihandle memory;
123 };
124
125 struct mem_map_entry {
126 __be64 base;
127 __be64 size;
128 };
129
130 typedef __be32 cell_t;
131
132 extern void __start(unsigned long r3, unsigned long r4, unsigned long r5,
133 unsigned long r6, unsigned long r7, unsigned long r8,
134 unsigned long r9);
135
136 #ifdef CONFIG_PPC64
137 extern int enter_prom(struct prom_args *args, unsigned long entry);
138 #else
139 static inline int enter_prom(struct prom_args *args, unsigned long entry)
140 {
141 return ((int (*)(struct prom_args *))entry)(args);
142 }
143 #endif
144
145 extern void copy_and_flush(unsigned long dest, unsigned long src,
146 unsigned long size, unsigned long offset);
147
148 /* prom structure */
149 static struct prom_t __initdata prom;
150
151 static unsigned long prom_entry __initdata;
152
153 #define PROM_SCRATCH_SIZE 256
154
155 static char __initdata of_stdout_device[256];
156 static char __initdata prom_scratch[PROM_SCRATCH_SIZE];
157
158 static unsigned long __initdata dt_header_start;
159 static unsigned long __initdata dt_struct_start, dt_struct_end;
160 static unsigned long __initdata dt_string_start, dt_string_end;
161
162 static unsigned long __initdata prom_initrd_start, prom_initrd_end;
163
164 #ifdef CONFIG_PPC64
165 static int __initdata prom_iommu_force_on;
166 static int __initdata prom_iommu_off;
167 static unsigned long __initdata prom_tce_alloc_start;
168 static unsigned long __initdata prom_tce_alloc_end;
169 #endif
170
171 /* Platforms codes are now obsolete in the kernel. Now only used within this
172 * file and ultimately gone too. Feel free to change them if you need, they
173 * are not shared with anything outside of this file anymore
174 */
175 #define PLATFORM_PSERIES 0x0100
176 #define PLATFORM_PSERIES_LPAR 0x0101
177 #define PLATFORM_LPAR 0x0001
178 #define PLATFORM_POWERMAC 0x0400
179 #define PLATFORM_GENERIC 0x0500
180 #define PLATFORM_OPAL 0x0600
181
182 static int __initdata of_platform;
183
184 static char __initdata prom_cmd_line[COMMAND_LINE_SIZE];
185
186 static unsigned long __initdata prom_memory_limit;
187
188 static unsigned long __initdata alloc_top;
189 static unsigned long __initdata alloc_top_high;
190 static unsigned long __initdata alloc_bottom;
191 static unsigned long __initdata rmo_top;
192 static unsigned long __initdata ram_top;
193
194 static struct mem_map_entry __initdata mem_reserve_map[MEM_RESERVE_MAP_SIZE];
195 static int __initdata mem_reserve_cnt;
196
197 static cell_t __initdata regbuf[1024];
198
199 static bool rtas_has_query_cpu_stopped;
200
201
202 /*
203 * Error results ... some OF calls will return "-1" on error, some
204 * will return 0, some will return either. To simplify, here are
205 * macros to use with any ihandle or phandle return value to check if
206 * it is valid
207 */
208
209 #define PROM_ERROR (-1u)
210 #define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR)
211 #define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR)
212
213
214 /* This is the one and *ONLY* place where we actually call open
215 * firmware.
216 */
217
218 static int __init call_prom(const char *service, int nargs, int nret, ...)
219 {
220 int i;
221 struct prom_args args;
222 va_list list;
223
224 args.service = cpu_to_be32(ADDR(service));
225 args.nargs = cpu_to_be32(nargs);
226 args.nret = cpu_to_be32(nret);
227
228 va_start(list, nret);
229 for (i = 0; i < nargs; i++)
230 args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
231 va_end(list);
232
233 for (i = 0; i < nret; i++)
234 args.args[nargs+i] = 0;
235
236 if (enter_prom(&args, prom_entry) < 0)
237 return PROM_ERROR;
238
239 return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
240 }
241
242 static int __init call_prom_ret(const char *service, int nargs, int nret,
243 prom_arg_t *rets, ...)
244 {
245 int i;
246 struct prom_args args;
247 va_list list;
248
249 args.service = cpu_to_be32(ADDR(service));
250 args.nargs = cpu_to_be32(nargs);
251 args.nret = cpu_to_be32(nret);
252
253 va_start(list, rets);
254 for (i = 0; i < nargs; i++)
255 args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t));
256 va_end(list);
257
258 for (i = 0; i < nret; i++)
259 args.args[nargs+i] = 0;
260
261 if (enter_prom(&args, prom_entry) < 0)
262 return PROM_ERROR;
263
264 if (rets != NULL)
265 for (i = 1; i < nret; ++i)
266 rets[i-1] = be32_to_cpu(args.args[nargs+i]);
267
268 return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0;
269 }
270
271
272 static void __init prom_print(const char *msg)
273 {
274 const char *p, *q;
275
276 if (prom.stdout == 0)
277 return;
278
279 for (p = msg; *p != 0; p = q) {
280 for (q = p; *q != 0 && *q != '\n'; ++q)
281 ;
282 if (q > p)
283 call_prom("write", 3, 1, prom.stdout, p, q - p);
284 if (*q == 0)
285 break;
286 ++q;
287 call_prom("write", 3, 1, prom.stdout, ADDR("\r\n"), 2);
288 }
289 }
290
291
292 static void __init prom_print_hex(unsigned long val)
293 {
294 int i, nibbles = sizeof(val)*2;
295 char buf[sizeof(val)*2+1];
296
297 for (i = nibbles-1; i >= 0; i--) {
298 buf[i] = (val & 0xf) + '0';
299 if (buf[i] > '9')
300 buf[i] += ('a'-'0'-10);
301 val >>= 4;
302 }
303 buf[nibbles] = '\0';
304 call_prom("write", 3, 1, prom.stdout, buf, nibbles);
305 }
306
307 /* max number of decimal digits in an unsigned long */
308 #define UL_DIGITS 21
309 static void __init prom_print_dec(unsigned long val)
310 {
311 int i, size;
312 char buf[UL_DIGITS+1];
313
314 for (i = UL_DIGITS-1; i >= 0; i--) {
315 buf[i] = (val % 10) + '0';
316 val = val/10;
317 if (val == 0)
318 break;
319 }
320 /* shift stuff down */
321 size = UL_DIGITS - i;
322 call_prom("write", 3, 1, prom.stdout, buf+i, size);
323 }
324
325 static void __init prom_printf(const char *format, ...)
326 {
327 const char *p, *q, *s;
328 va_list args;
329 unsigned long v;
330 long vs;
331
332 va_start(args, format);
333 for (p = format; *p != 0; p = q) {
334 for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q)
335 ;
336 if (q > p)
337 call_prom("write", 3, 1, prom.stdout, p, q - p);
338 if (*q == 0)
339 break;
340 if (*q == '\n') {
341 ++q;
342 call_prom("write", 3, 1, prom.stdout,
343 ADDR("\r\n"), 2);
344 continue;
345 }
346 ++q;
347 if (*q == 0)
348 break;
349 switch (*q) {
350 case 's':
351 ++q;
352 s = va_arg(args, const char *);
353 prom_print(s);
354 break;
355 case 'x':
356 ++q;
357 v = va_arg(args, unsigned long);
358 prom_print_hex(v);
359 break;
360 case 'd':
361 ++q;
362 vs = va_arg(args, int);
363 if (vs < 0) {
364 prom_print("-");
365 vs = -vs;
366 }
367 prom_print_dec(vs);
368 break;
369 case 'l':
370 ++q;
371 if (*q == 0)
372 break;
373 else if (*q == 'x') {
374 ++q;
375 v = va_arg(args, unsigned long);
376 prom_print_hex(v);
377 } else if (*q == 'u') { /* '%lu' */
378 ++q;
379 v = va_arg(args, unsigned long);
380 prom_print_dec(v);
381 } else if (*q == 'd') { /* %ld */
382 ++q;
383 vs = va_arg(args, long);
384 if (vs < 0) {
385 prom_print("-");
386 vs = -vs;
387 }
388 prom_print_dec(vs);
389 }
390 break;
391 }
392 }
393 }
394
395
396 static unsigned int __init prom_claim(unsigned long virt, unsigned long size,
397 unsigned long align)
398 {
399
400 if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) {
401 /*
402 * Old OF requires we claim physical and virtual separately
403 * and then map explicitly (assuming virtual mode)
404 */
405 int ret;
406 prom_arg_t result;
407
408 ret = call_prom_ret("call-method", 5, 2, &result,
409 ADDR("claim"), prom.memory,
410 align, size, virt);
411 if (ret != 0 || result == -1)
412 return -1;
413 ret = call_prom_ret("call-method", 5, 2, &result,
414 ADDR("claim"), prom.mmumap,
415 align, size, virt);
416 if (ret != 0) {
417 call_prom("call-method", 4, 1, ADDR("release"),
418 prom.memory, size, virt);
419 return -1;
420 }
421 /* the 0x12 is M (coherence) + PP == read/write */
422 call_prom("call-method", 6, 1,
423 ADDR("map"), prom.mmumap, 0x12, size, virt, virt);
424 return virt;
425 }
426 return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size,
427 (prom_arg_t)align);
428 }
429
430 static void __init __attribute__((noreturn)) prom_panic(const char *reason)
431 {
432 prom_print(reason);
433 /* Do not call exit because it clears the screen on pmac
434 * it also causes some sort of double-fault on early pmacs */
435 if (of_platform == PLATFORM_POWERMAC)
436 asm("trap\n");
437
438 /* ToDo: should put up an SRC here on pSeries */
439 call_prom("exit", 0, 0);
440
441 for (;;) /* should never get here */
442 ;
443 }
444
445
446 static int __init prom_next_node(phandle *nodep)
447 {
448 phandle node;
449
450 if ((node = *nodep) != 0
451 && (*nodep = call_prom("child", 1, 1, node)) != 0)
452 return 1;
453 if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
454 return 1;
455 for (;;) {
456 if ((node = call_prom("parent", 1, 1, node)) == 0)
457 return 0;
458 if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
459 return 1;
460 }
461 }
462
463 static int inline prom_getprop(phandle node, const char *pname,
464 void *value, size_t valuelen)
465 {
466 return call_prom("getprop", 4, 1, node, ADDR(pname),
467 (u32)(unsigned long) value, (u32) valuelen);
468 }
469
470 static int inline prom_getproplen(phandle node, const char *pname)
471 {
472 return call_prom("getproplen", 2, 1, node, ADDR(pname));
473 }
474
475 static void add_string(char **str, const char *q)
476 {
477 char *p = *str;
478
479 while (*q)
480 *p++ = *q++;
481 *p++ = ' ';
482 *str = p;
483 }
484
485 static char *tohex(unsigned int x)
486 {
487 static char digits[] = "0123456789abcdef";
488 static char result[9];
489 int i;
490
491 result[8] = 0;
492 i = 8;
493 do {
494 --i;
495 result[i] = digits[x & 0xf];
496 x >>= 4;
497 } while (x != 0 && i > 0);
498 return &result[i];
499 }
500
501 static int __init prom_setprop(phandle node, const char *nodename,
502 const char *pname, void *value, size_t valuelen)
503 {
504 char cmd[256], *p;
505
506 if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL))
507 return call_prom("setprop", 4, 1, node, ADDR(pname),
508 (u32)(unsigned long) value, (u32) valuelen);
509
510 /* gah... setprop doesn't work on longtrail, have to use interpret */
511 p = cmd;
512 add_string(&p, "dev");
513 add_string(&p, nodename);
514 add_string(&p, tohex((u32)(unsigned long) value));
515 add_string(&p, tohex(valuelen));
516 add_string(&p, tohex(ADDR(pname)));
517 add_string(&p, tohex(strlen(pname)));
518 add_string(&p, "property");
519 *p = 0;
520 return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd);
521 }
522
523 /* We can't use the standard versions because of relocation headaches. */
524 #define isxdigit(c) (('0' <= (c) && (c) <= '9') \
525 || ('a' <= (c) && (c) <= 'f') \
526 || ('A' <= (c) && (c) <= 'F'))
527
528 #define isdigit(c) ('0' <= (c) && (c) <= '9')
529 #define islower(c) ('a' <= (c) && (c) <= 'z')
530 #define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c))
531
532 static unsigned long prom_strtoul(const char *cp, const char **endp)
533 {
534 unsigned long result = 0, base = 10, value;
535
536 if (*cp == '0') {
537 base = 8;
538 cp++;
539 if (toupper(*cp) == 'X') {
540 cp++;
541 base = 16;
542 }
543 }
544
545 while (isxdigit(*cp) &&
546 (value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) {
547 result = result * base + value;
548 cp++;
549 }
550
551 if (endp)
552 *endp = cp;
553
554 return result;
555 }
556
557 static unsigned long prom_memparse(const char *ptr, const char **retptr)
558 {
559 unsigned long ret = prom_strtoul(ptr, retptr);
560 int shift = 0;
561
562 /*
563 * We can't use a switch here because GCC *may* generate a
564 * jump table which won't work, because we're not running at
565 * the address we're linked at.
566 */
567 if ('G' == **retptr || 'g' == **retptr)
568 shift = 30;
569
570 if ('M' == **retptr || 'm' == **retptr)
571 shift = 20;
572
573 if ('K' == **retptr || 'k' == **retptr)
574 shift = 10;
575
576 if (shift) {
577 ret <<= shift;
578 (*retptr)++;
579 }
580
581 return ret;
582 }
583
584 /*
585 * Early parsing of the command line passed to the kernel, used for
586 * "mem=x" and the options that affect the iommu
587 */
588 static void __init early_cmdline_parse(void)
589 {
590 const char *opt;
591
592 char *p;
593 int l = 0;
594
595 prom_cmd_line[0] = 0;
596 p = prom_cmd_line;
597 if ((long)prom.chosen > 0)
598 l = prom_getprop(prom.chosen, "bootargs", p, COMMAND_LINE_SIZE-1);
599 #ifdef CONFIG_CMDLINE
600 if (l <= 0 || p[0] == '\0') /* dbl check */
601 strlcpy(prom_cmd_line,
602 CONFIG_CMDLINE, sizeof(prom_cmd_line));
603 #endif /* CONFIG_CMDLINE */
604 prom_printf("command line: %s\n", prom_cmd_line);
605
606 #ifdef CONFIG_PPC64
607 opt = strstr(prom_cmd_line, "iommu=");
608 if (opt) {
609 prom_printf("iommu opt is: %s\n", opt);
610 opt += 6;
611 while (*opt && *opt == ' ')
612 opt++;
613 if (!strncmp(opt, "off", 3))
614 prom_iommu_off = 1;
615 else if (!strncmp(opt, "force", 5))
616 prom_iommu_force_on = 1;
617 }
618 #endif
619 opt = strstr(prom_cmd_line, "mem=");
620 if (opt) {
621 opt += 4;
622 prom_memory_limit = prom_memparse(opt, (const char **)&opt);
623 #ifdef CONFIG_PPC64
624 /* Align to 16 MB == size of ppc64 large page */
625 prom_memory_limit = ALIGN(prom_memory_limit, 0x1000000);
626 #endif
627 }
628 }
629
630 #if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
631 /*
632 * The architecture vector has an array of PVR mask/value pairs,
633 * followed by # option vectors - 1, followed by the option vectors.
634 *
635 * See prom.h for the definition of the bits specified in the
636 * architecture vector.
637 *
638 * Because the description vector contains a mix of byte and word
639 * values, we declare it as an unsigned char array, and use this
640 * macro to put word values in.
641 */
642 #define W(x) ((x) >> 24) & 0xff, ((x) >> 16) & 0xff, \
643 ((x) >> 8) & 0xff, (x) & 0xff
644
645 unsigned char ibm_architecture_vec[] = {
646 W(0xfffe0000), W(0x003a0000), /* POWER5/POWER5+ */
647 W(0xffff0000), W(0x003e0000), /* POWER6 */
648 W(0xffff0000), W(0x003f0000), /* POWER7 */
649 W(0xffff0000), W(0x004b0000), /* POWER8E */
650 W(0xffff0000), W(0x004d0000), /* POWER8 */
651 W(0xffffffff), W(0x0f000004), /* all 2.07-compliant */
652 W(0xffffffff), W(0x0f000003), /* all 2.06-compliant */
653 W(0xffffffff), W(0x0f000002), /* all 2.05-compliant */
654 W(0xfffffffe), W(0x0f000001), /* all 2.04-compliant and earlier */
655 6 - 1, /* 6 option vectors */
656
657 /* option vector 1: processor architectures supported */
658 3 - 2, /* length */
659 0, /* don't ignore, don't halt */
660 OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 |
661 OV1_PPC_2_04 | OV1_PPC_2_05 | OV1_PPC_2_06 | OV1_PPC_2_07,
662
663 /* option vector 2: Open Firmware options supported */
664 34 - 2, /* length */
665 OV2_REAL_MODE,
666 0, 0,
667 W(0xffffffff), /* real_base */
668 W(0xffffffff), /* real_size */
669 W(0xffffffff), /* virt_base */
670 W(0xffffffff), /* virt_size */
671 W(0xffffffff), /* load_base */
672 W(256), /* 256MB min RMA */
673 W(0xffffffff), /* full client load */
674 0, /* min RMA percentage of total RAM */
675 48, /* max log_2(hash table size) */
676
677 /* option vector 3: processor options supported */
678 3 - 2, /* length */
679 0, /* don't ignore, don't halt */
680 OV3_FP | OV3_VMX | OV3_DFP,
681
682 /* option vector 4: IBM PAPR implementation */
683 3 - 2, /* length */
684 0, /* don't halt */
685 OV4_MIN_ENT_CAP, /* minimum VP entitled capacity */
686
687 /* option vector 5: PAPR/OF options */
688 19 - 2, /* length */
689 0, /* don't ignore, don't halt */
690 OV5_FEAT(OV5_LPAR) | OV5_FEAT(OV5_SPLPAR) | OV5_FEAT(OV5_LARGE_PAGES) |
691 OV5_FEAT(OV5_DRCONF_MEMORY) | OV5_FEAT(OV5_DONATE_DEDICATE_CPU) |
692 #ifdef CONFIG_PCI_MSI
693 /* PCIe/MSI support. Without MSI full PCIe is not supported */
694 OV5_FEAT(OV5_MSI),
695 #else
696 0,
697 #endif
698 0,
699 #ifdef CONFIG_PPC_SMLPAR
700 OV5_FEAT(OV5_CMO) | OV5_FEAT(OV5_XCMO),
701 #else
702 0,
703 #endif
704 OV5_FEAT(OV5_TYPE1_AFFINITY) | OV5_FEAT(OV5_PRRN),
705 0,
706 0,
707 0,
708 /* WARNING: The offset of the "number of cores" field below
709 * must match by the macro below. Update the definition if
710 * the structure layout changes.
711 */
712 #define IBM_ARCH_VEC_NRCORES_OFFSET 125
713 W(NR_CPUS), /* number of cores supported */
714 0,
715 0,
716 0,
717 0,
718 OV5_FEAT(OV5_PFO_HW_RNG) | OV5_FEAT(OV5_PFO_HW_ENCR) |
719 OV5_FEAT(OV5_PFO_HW_842),
720 OV5_FEAT(OV5_SUB_PROCESSORS),
721 /* option vector 6: IBM PAPR hints */
722 4 - 2, /* length */
723 0,
724 0,
725 OV6_LINUX,
726
727 };
728
729 /* Old method - ELF header with PT_NOTE sections only works on BE */
730 #ifdef __BIG_ENDIAN__
731 static struct fake_elf {
732 Elf32_Ehdr elfhdr;
733 Elf32_Phdr phdr[2];
734 struct chrpnote {
735 u32 namesz;
736 u32 descsz;
737 u32 type;
738 char name[8]; /* "PowerPC" */
739 struct chrpdesc {
740 u32 real_mode;
741 u32 real_base;
742 u32 real_size;
743 u32 virt_base;
744 u32 virt_size;
745 u32 load_base;
746 } chrpdesc;
747 } chrpnote;
748 struct rpanote {
749 u32 namesz;
750 u32 descsz;
751 u32 type;
752 char name[24]; /* "IBM,RPA-Client-Config" */
753 struct rpadesc {
754 u32 lpar_affinity;
755 u32 min_rmo_size;
756 u32 min_rmo_percent;
757 u32 max_pft_size;
758 u32 splpar;
759 u32 min_load;
760 u32 new_mem_def;
761 u32 ignore_me;
762 } rpadesc;
763 } rpanote;
764 } fake_elf = {
765 .elfhdr = {
766 .e_ident = { 0x7f, 'E', 'L', 'F',
767 ELFCLASS32, ELFDATA2MSB, EV_CURRENT },
768 .e_type = ET_EXEC, /* yeah right */
769 .e_machine = EM_PPC,
770 .e_version = EV_CURRENT,
771 .e_phoff = offsetof(struct fake_elf, phdr),
772 .e_phentsize = sizeof(Elf32_Phdr),
773 .e_phnum = 2
774 },
775 .phdr = {
776 [0] = {
777 .p_type = PT_NOTE,
778 .p_offset = offsetof(struct fake_elf, chrpnote),
779 .p_filesz = sizeof(struct chrpnote)
780 }, [1] = {
781 .p_type = PT_NOTE,
782 .p_offset = offsetof(struct fake_elf, rpanote),
783 .p_filesz = sizeof(struct rpanote)
784 }
785 },
786 .chrpnote = {
787 .namesz = sizeof("PowerPC"),
788 .descsz = sizeof(struct chrpdesc),
789 .type = 0x1275,
790 .name = "PowerPC",
791 .chrpdesc = {
792 .real_mode = ~0U, /* ~0 means "don't care" */
793 .real_base = ~0U,
794 .real_size = ~0U,
795 .virt_base = ~0U,
796 .virt_size = ~0U,
797 .load_base = ~0U
798 },
799 },
800 .rpanote = {
801 .namesz = sizeof("IBM,RPA-Client-Config"),
802 .descsz = sizeof(struct rpadesc),
803 .type = 0x12759999,
804 .name = "IBM,RPA-Client-Config",
805 .rpadesc = {
806 .lpar_affinity = 0,
807 .min_rmo_size = 64, /* in megabytes */
808 .min_rmo_percent = 0,
809 .max_pft_size = 48, /* 2^48 bytes max PFT size */
810 .splpar = 1,
811 .min_load = ~0U,
812 .new_mem_def = 0
813 }
814 }
815 };
816 #endif /* __BIG_ENDIAN__ */
817
818 static int __init prom_count_smt_threads(void)
819 {
820 phandle node;
821 char type[64];
822 unsigned int plen;
823
824 /* Pick up th first CPU node we can find */
825 for (node = 0; prom_next_node(&node); ) {
826 type[0] = 0;
827 prom_getprop(node, "device_type", type, sizeof(type));
828
829 if (strcmp(type, "cpu"))
830 continue;
831 /*
832 * There is an entry for each smt thread, each entry being
833 * 4 bytes long. All cpus should have the same number of
834 * smt threads, so return after finding the first.
835 */
836 plen = prom_getproplen(node, "ibm,ppc-interrupt-server#s");
837 if (plen == PROM_ERROR)
838 break;
839 plen >>= 2;
840 prom_debug("Found %lu smt threads per core\n", (unsigned long)plen);
841
842 /* Sanity check */
843 if (plen < 1 || plen > 64) {
844 prom_printf("Threads per core %lu out of bounds, assuming 1\n",
845 (unsigned long)plen);
846 return 1;
847 }
848 return plen;
849 }
850 prom_debug("No threads found, assuming 1 per core\n");
851
852 return 1;
853
854 }
855
856
857 static void __init prom_send_capabilities(void)
858 {
859 ihandle root;
860 prom_arg_t ret;
861 u32 cores;
862 unsigned char *ptcores;
863
864 root = call_prom("open", 1, 1, ADDR("/"));
865 if (root != 0) {
866 /* We need to tell the FW about the number of cores we support.
867 *
868 * To do that, we count the number of threads on the first core
869 * (we assume this is the same for all cores) and use it to
870 * divide NR_CPUS.
871 */
872
873 /* The core value may start at an odd address. If such a word
874 * access is made at a cache line boundary, this leads to an
875 * exception which may not be handled at this time.
876 * Forcing a per byte access to avoid exception.
877 */
878 ptcores = &ibm_architecture_vec[IBM_ARCH_VEC_NRCORES_OFFSET];
879 cores = 0;
880 cores |= ptcores[0] << 24;
881 cores |= ptcores[1] << 16;
882 cores |= ptcores[2] << 8;
883 cores |= ptcores[3];
884 if (cores != NR_CPUS) {
885 prom_printf("WARNING ! "
886 "ibm_architecture_vec structure inconsistent: %lu!\n",
887 cores);
888 } else {
889 cores = DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads());
890 prom_printf("Max number of cores passed to firmware: %lu (NR_CPUS = %lu)\n",
891 cores, NR_CPUS);
892 ptcores[0] = (cores >> 24) & 0xff;
893 ptcores[1] = (cores >> 16) & 0xff;
894 ptcores[2] = (cores >> 8) & 0xff;
895 ptcores[3] = cores & 0xff;
896 }
897
898 /* try calling the ibm,client-architecture-support method */
899 prom_printf("Calling ibm,client-architecture-support...");
900 if (call_prom_ret("call-method", 3, 2, &ret,
901 ADDR("ibm,client-architecture-support"),
902 root,
903 ADDR(ibm_architecture_vec)) == 0) {
904 /* the call exists... */
905 if (ret)
906 prom_printf("\nWARNING: ibm,client-architecture"
907 "-support call FAILED!\n");
908 call_prom("close", 1, 0, root);
909 prom_printf(" done\n");
910 return;
911 }
912 call_prom("close", 1, 0, root);
913 prom_printf(" not implemented\n");
914 }
915
916 #ifdef __BIG_ENDIAN__
917 {
918 ihandle elfloader;
919
920 /* no ibm,client-architecture-support call, try the old way */
921 elfloader = call_prom("open", 1, 1,
922 ADDR("/packages/elf-loader"));
923 if (elfloader == 0) {
924 prom_printf("couldn't open /packages/elf-loader\n");
925 return;
926 }
927 call_prom("call-method", 3, 1, ADDR("process-elf-header"),
928 elfloader, ADDR(&fake_elf));
929 call_prom("close", 1, 0, elfloader);
930 }
931 #endif /* __BIG_ENDIAN__ */
932 }
933 #endif /* #if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) */
934
935 /*
936 * Memory allocation strategy... our layout is normally:
937 *
938 * at 14Mb or more we have vmlinux, then a gap and initrd. In some
939 * rare cases, initrd might end up being before the kernel though.
940 * We assume this won't override the final kernel at 0, we have no
941 * provision to handle that in this version, but it should hopefully
942 * never happen.
943 *
944 * alloc_top is set to the top of RMO, eventually shrink down if the
945 * TCEs overlap
946 *
947 * alloc_bottom is set to the top of kernel/initrd
948 *
949 * from there, allocations are done this way : rtas is allocated
950 * topmost, and the device-tree is allocated from the bottom. We try
951 * to grow the device-tree allocation as we progress. If we can't,
952 * then we fail, we don't currently have a facility to restart
953 * elsewhere, but that shouldn't be necessary.
954 *
955 * Note that calls to reserve_mem have to be done explicitly, memory
956 * allocated with either alloc_up or alloc_down isn't automatically
957 * reserved.
958 */
959
960
961 /*
962 * Allocates memory in the RMO upward from the kernel/initrd
963 *
964 * When align is 0, this is a special case, it means to allocate in place
965 * at the current location of alloc_bottom or fail (that is basically
966 * extending the previous allocation). Used for the device-tree flattening
967 */
968 static unsigned long __init alloc_up(unsigned long size, unsigned long align)
969 {
970 unsigned long base = alloc_bottom;
971 unsigned long addr = 0;
972
973 if (align)
974 base = _ALIGN_UP(base, align);
975 prom_debug("alloc_up(%x, %x)\n", size, align);
976 if (ram_top == 0)
977 prom_panic("alloc_up() called with mem not initialized\n");
978
979 if (align)
980 base = _ALIGN_UP(alloc_bottom, align);
981 else
982 base = alloc_bottom;
983
984 for(; (base + size) <= alloc_top;
985 base = _ALIGN_UP(base + 0x100000, align)) {
986 prom_debug(" trying: 0x%x\n\r", base);
987 addr = (unsigned long)prom_claim(base, size, 0);
988 if (addr != PROM_ERROR && addr != 0)
989 break;
990 addr = 0;
991 if (align == 0)
992 break;
993 }
994 if (addr == 0)
995 return 0;
996 alloc_bottom = addr + size;
997
998 prom_debug(" -> %x\n", addr);
999 prom_debug(" alloc_bottom : %x\n", alloc_bottom);
1000 prom_debug(" alloc_top : %x\n", alloc_top);
1001 prom_debug(" alloc_top_hi : %x\n", alloc_top_high);
1002 prom_debug(" rmo_top : %x\n", rmo_top);
1003 prom_debug(" ram_top : %x\n", ram_top);
1004
1005 return addr;
1006 }
1007
1008 /*
1009 * Allocates memory downward, either from top of RMO, or if highmem
1010 * is set, from the top of RAM. Note that this one doesn't handle
1011 * failures. It does claim memory if highmem is not set.
1012 */
1013 static unsigned long __init alloc_down(unsigned long size, unsigned long align,
1014 int highmem)
1015 {
1016 unsigned long base, addr = 0;
1017
1018 prom_debug("alloc_down(%x, %x, %s)\n", size, align,
1019 highmem ? "(high)" : "(low)");
1020 if (ram_top == 0)
1021 prom_panic("alloc_down() called with mem not initialized\n");
1022
1023 if (highmem) {
1024 /* Carve out storage for the TCE table. */
1025 addr = _ALIGN_DOWN(alloc_top_high - size, align);
1026 if (addr <= alloc_bottom)
1027 return 0;
1028 /* Will we bump into the RMO ? If yes, check out that we
1029 * didn't overlap existing allocations there, if we did,
1030 * we are dead, we must be the first in town !
1031 */
1032 if (addr < rmo_top) {
1033 /* Good, we are first */
1034 if (alloc_top == rmo_top)
1035 alloc_top = rmo_top = addr;
1036 else
1037 return 0;
1038 }
1039 alloc_top_high = addr;
1040 goto bail;
1041 }
1042
1043 base = _ALIGN_DOWN(alloc_top - size, align);
1044 for (; base > alloc_bottom;
1045 base = _ALIGN_DOWN(base - 0x100000, align)) {
1046 prom_debug(" trying: 0x%x\n\r", base);
1047 addr = (unsigned long)prom_claim(base, size, 0);
1048 if (addr != PROM_ERROR && addr != 0)
1049 break;
1050 addr = 0;
1051 }
1052 if (addr == 0)
1053 return 0;
1054 alloc_top = addr;
1055
1056 bail:
1057 prom_debug(" -> %x\n", addr);
1058 prom_debug(" alloc_bottom : %x\n", alloc_bottom);
1059 prom_debug(" alloc_top : %x\n", alloc_top);
1060 prom_debug(" alloc_top_hi : %x\n", alloc_top_high);
1061 prom_debug(" rmo_top : %x\n", rmo_top);
1062 prom_debug(" ram_top : %x\n", ram_top);
1063
1064 return addr;
1065 }
1066
1067 /*
1068 * Parse a "reg" cell
1069 */
1070 static unsigned long __init prom_next_cell(int s, cell_t **cellp)
1071 {
1072 cell_t *p = *cellp;
1073 unsigned long r = 0;
1074
1075 /* Ignore more than 2 cells */
1076 while (s > sizeof(unsigned long) / 4) {
1077 p++;
1078 s--;
1079 }
1080 r = be32_to_cpu(*p++);
1081 #ifdef CONFIG_PPC64
1082 if (s > 1) {
1083 r <<= 32;
1084 r |= be32_to_cpu(*(p++));
1085 }
1086 #endif
1087 *cellp = p;
1088 return r;
1089 }
1090
1091 /*
1092 * Very dumb function for adding to the memory reserve list, but
1093 * we don't need anything smarter at this point
1094 *
1095 * XXX Eventually check for collisions. They should NEVER happen.
1096 * If problems seem to show up, it would be a good start to track
1097 * them down.
1098 */
1099 static void __init reserve_mem(u64 base, u64 size)
1100 {
1101 u64 top = base + size;
1102 unsigned long cnt = mem_reserve_cnt;
1103
1104 if (size == 0)
1105 return;
1106
1107 /* We need to always keep one empty entry so that we
1108 * have our terminator with "size" set to 0 since we are
1109 * dumb and just copy this entire array to the boot params
1110 */
1111 base = _ALIGN_DOWN(base, PAGE_SIZE);
1112 top = _ALIGN_UP(top, PAGE_SIZE);
1113 size = top - base;
1114
1115 if (cnt >= (MEM_RESERVE_MAP_SIZE - 1))
1116 prom_panic("Memory reserve map exhausted !\n");
1117 mem_reserve_map[cnt].base = cpu_to_be64(base);
1118 mem_reserve_map[cnt].size = cpu_to_be64(size);
1119 mem_reserve_cnt = cnt + 1;
1120 }
1121
1122 /*
1123 * Initialize memory allocation mechanism, parse "memory" nodes and
1124 * obtain that way the top of memory and RMO to setup out local allocator
1125 */
1126 static void __init prom_init_mem(void)
1127 {
1128 phandle node;
1129 char *path, type[64];
1130 unsigned int plen;
1131 cell_t *p, *endp;
1132 __be32 val;
1133 u32 rac, rsc;
1134
1135 /*
1136 * We iterate the memory nodes to find
1137 * 1) top of RMO (first node)
1138 * 2) top of memory
1139 */
1140 val = cpu_to_be32(2);
1141 prom_getprop(prom.root, "#address-cells", &val, sizeof(val));
1142 rac = be32_to_cpu(val);
1143 val = cpu_to_be32(1);
1144 prom_getprop(prom.root, "#size-cells", &val, sizeof(rsc));
1145 rsc = be32_to_cpu(val);
1146 prom_debug("root_addr_cells: %x\n", rac);
1147 prom_debug("root_size_cells: %x\n", rsc);
1148
1149 prom_debug("scanning memory:\n");
1150 path = prom_scratch;
1151
1152 for (node = 0; prom_next_node(&node); ) {
1153 type[0] = 0;
1154 prom_getprop(node, "device_type", type, sizeof(type));
1155
1156 if (type[0] == 0) {
1157 /*
1158 * CHRP Longtrail machines have no device_type
1159 * on the memory node, so check the name instead...
1160 */
1161 prom_getprop(node, "name", type, sizeof(type));
1162 }
1163 if (strcmp(type, "memory"))
1164 continue;
1165
1166 plen = prom_getprop(node, "reg", regbuf, sizeof(regbuf));
1167 if (plen > sizeof(regbuf)) {
1168 prom_printf("memory node too large for buffer !\n");
1169 plen = sizeof(regbuf);
1170 }
1171 p = regbuf;
1172 endp = p + (plen / sizeof(cell_t));
1173
1174 #ifdef DEBUG_PROM
1175 memset(path, 0, PROM_SCRATCH_SIZE);
1176 call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1);
1177 prom_debug(" node %s :\n", path);
1178 #endif /* DEBUG_PROM */
1179
1180 while ((endp - p) >= (rac + rsc)) {
1181 unsigned long base, size;
1182
1183 base = prom_next_cell(rac, &p);
1184 size = prom_next_cell(rsc, &p);
1185
1186 if (size == 0)
1187 continue;
1188 prom_debug(" %x %x\n", base, size);
1189 if (base == 0 && (of_platform & PLATFORM_LPAR))
1190 rmo_top = size;
1191 if ((base + size) > ram_top)
1192 ram_top = base + size;
1193 }
1194 }
1195
1196 alloc_bottom = PAGE_ALIGN((unsigned long)&_end + 0x4000);
1197
1198 /*
1199 * If prom_memory_limit is set we reduce the upper limits *except* for
1200 * alloc_top_high. This must be the real top of RAM so we can put
1201 * TCE's up there.
1202 */
1203
1204 alloc_top_high = ram_top;
1205
1206 if (prom_memory_limit) {
1207 if (prom_memory_limit <= alloc_bottom) {
1208 prom_printf("Ignoring mem=%x <= alloc_bottom.\n",
1209 prom_memory_limit);
1210 prom_memory_limit = 0;
1211 } else if (prom_memory_limit >= ram_top) {
1212 prom_printf("Ignoring mem=%x >= ram_top.\n",
1213 prom_memory_limit);
1214 prom_memory_limit = 0;
1215 } else {
1216 ram_top = prom_memory_limit;
1217 rmo_top = min(rmo_top, prom_memory_limit);
1218 }
1219 }
1220
1221 /*
1222 * Setup our top alloc point, that is top of RMO or top of
1223 * segment 0 when running non-LPAR.
1224 * Some RS64 machines have buggy firmware where claims up at
1225 * 1GB fail. Cap at 768MB as a workaround.
1226 * Since 768MB is plenty of room, and we need to cap to something
1227 * reasonable on 32-bit, cap at 768MB on all machines.
1228 */
1229 if (!rmo_top)
1230 rmo_top = ram_top;
1231 rmo_top = min(0x30000000ul, rmo_top);
1232 alloc_top = rmo_top;
1233 alloc_top_high = ram_top;
1234
1235 /*
1236 * Check if we have an initrd after the kernel but still inside
1237 * the RMO. If we do move our bottom point to after it.
1238 */
1239 if (prom_initrd_start &&
1240 prom_initrd_start < rmo_top &&
1241 prom_initrd_end > alloc_bottom)
1242 alloc_bottom = PAGE_ALIGN(prom_initrd_end);
1243
1244 prom_printf("memory layout at init:\n");
1245 prom_printf(" memory_limit : %x (16 MB aligned)\n", prom_memory_limit);
1246 prom_printf(" alloc_bottom : %x\n", alloc_bottom);
1247 prom_printf(" alloc_top : %x\n", alloc_top);
1248 prom_printf(" alloc_top_hi : %x\n", alloc_top_high);
1249 prom_printf(" rmo_top : %x\n", rmo_top);
1250 prom_printf(" ram_top : %x\n", ram_top);
1251 }
1252
1253 static void __init prom_close_stdin(void)
1254 {
1255 __be32 val;
1256 ihandle stdin;
1257
1258 if (prom_getprop(prom.chosen, "stdin", &val, sizeof(val)) > 0) {
1259 stdin = be32_to_cpu(val);
1260 call_prom("close", 1, 0, stdin);
1261 }
1262 }
1263
1264 #ifdef CONFIG_PPC_POWERNV
1265
1266 #ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
1267 static u64 __initdata prom_opal_base;
1268 static u64 __initdata prom_opal_entry;
1269 #endif
1270
1271 #ifdef __BIG_ENDIAN__
1272 /* XXX Don't change this structure without updating opal-takeover.S */
1273 static struct opal_secondary_data {
1274 s64 ack; /* 0 */
1275 u64 go; /* 8 */
1276 struct opal_takeover_args args; /* 16 */
1277 } opal_secondary_data;
1278
1279 static u64 __initdata prom_opal_align;
1280 static u64 __initdata prom_opal_size;
1281 static int __initdata prom_rtas_start_cpu;
1282 static u64 __initdata prom_rtas_data;
1283 static u64 __initdata prom_rtas_entry;
1284
1285 extern char opal_secondary_entry;
1286
1287 static void __init prom_query_opal(void)
1288 {
1289 long rc;
1290
1291 /* We must not query for OPAL presence on a machine that
1292 * supports TNK takeover (970 blades), as this uses the same
1293 * h-call with different arguments and will crash
1294 */
1295 if (PHANDLE_VALID(call_prom("finddevice", 1, 1,
1296 ADDR("/tnk-memory-map")))) {
1297 prom_printf("TNK takeover detected, skipping OPAL check\n");
1298 return;
1299 }
1300
1301 prom_printf("Querying for OPAL presence... ");
1302
1303 rc = opal_query_takeover(&prom_opal_size,
1304 &prom_opal_align);
1305 prom_debug("(rc = %ld) ", rc);
1306 if (rc != 0) {
1307 prom_printf("not there.\n");
1308 return;
1309 }
1310 of_platform = PLATFORM_OPAL;
1311 prom_printf(" there !\n");
1312 prom_debug(" opal_size = 0x%lx\n", prom_opal_size);
1313 prom_debug(" opal_align = 0x%lx\n", prom_opal_align);
1314 if (prom_opal_align < 0x10000)
1315 prom_opal_align = 0x10000;
1316 }
1317
1318 static int __init prom_rtas_call(int token, int nargs, int nret,
1319 int *outputs, ...)
1320 {
1321 struct rtas_args rtas_args;
1322 va_list list;
1323 int i;
1324
1325 rtas_args.token = token;
1326 rtas_args.nargs = nargs;
1327 rtas_args.nret = nret;
1328 rtas_args.rets = (rtas_arg_t *)&(rtas_args.args[nargs]);
1329 va_start(list, outputs);
1330 for (i = 0; i < nargs; ++i)
1331 rtas_args.args[i] = va_arg(list, rtas_arg_t);
1332 va_end(list);
1333
1334 for (i = 0; i < nret; ++i)
1335 rtas_args.rets[i] = 0;
1336
1337 opal_enter_rtas(&rtas_args, prom_rtas_data,
1338 prom_rtas_entry);
1339
1340 if (nret > 1 && outputs != NULL)
1341 for (i = 0; i < nret-1; ++i)
1342 outputs[i] = rtas_args.rets[i+1];
1343 return (nret > 0)? rtas_args.rets[0]: 0;
1344 }
1345
1346 static void __init prom_opal_hold_cpus(void)
1347 {
1348 int i, cnt, cpu, rc;
1349 long j;
1350 phandle node;
1351 char type[64];
1352 u32 servers[8];
1353 void *entry = (unsigned long *)&opal_secondary_entry;
1354 struct opal_secondary_data *data = &opal_secondary_data;
1355
1356 prom_debug("prom_opal_hold_cpus: start...\n");
1357 prom_debug(" - entry = 0x%x\n", entry);
1358 prom_debug(" - data = 0x%x\n", data);
1359
1360 data->ack = -1;
1361 data->go = 0;
1362
1363 /* look for cpus */
1364 for (node = 0; prom_next_node(&node); ) {
1365 type[0] = 0;
1366 prom_getprop(node, "device_type", type, sizeof(type));
1367 if (strcmp(type, "cpu") != 0)
1368 continue;
1369
1370 /* Skip non-configured cpus. */
1371 if (prom_getprop(node, "status", type, sizeof(type)) > 0)
1372 if (strcmp(type, "okay") != 0)
1373 continue;
1374
1375 cnt = prom_getprop(node, "ibm,ppc-interrupt-server#s", servers,
1376 sizeof(servers));
1377 if (cnt == PROM_ERROR)
1378 break;
1379 cnt >>= 2;
1380 for (i = 0; i < cnt; i++) {
1381 cpu = servers[i];
1382 prom_debug("CPU %d ... ", cpu);
1383 if (cpu == prom.cpu) {
1384 prom_debug("booted !\n");
1385 continue;
1386 }
1387 prom_debug("starting ... ");
1388
1389 /* Init the acknowledge var which will be reset by
1390 * the secondary cpu when it awakens from its OF
1391 * spinloop.
1392 */
1393 data->ack = -1;
1394 rc = prom_rtas_call(prom_rtas_start_cpu, 3, 1,
1395 NULL, cpu, entry, data);
1396 prom_debug("rtas rc=%d ...", rc);
1397
1398 for (j = 0; j < 100000000 && data->ack == -1; j++) {
1399 HMT_low();
1400 mb();
1401 }
1402 HMT_medium();
1403 if (data->ack != -1)
1404 prom_debug("done, PIR=0x%x\n", data->ack);
1405 else
1406 prom_debug("timeout !\n");
1407 }
1408 }
1409 prom_debug("prom_opal_hold_cpus: end...\n");
1410 }
1411
1412 static void __init prom_opal_takeover(void)
1413 {
1414 struct opal_secondary_data *data = &opal_secondary_data;
1415 struct opal_takeover_args *args = &data->args;
1416 u64 align = prom_opal_align;
1417 u64 top_addr, opal_addr;
1418
1419 args->k_image = (u64)_stext;
1420 args->k_size = _end - _stext;
1421 args->k_entry = 0;
1422 args->k_entry2 = 0x60;
1423
1424 top_addr = _ALIGN_UP(args->k_size, align);
1425
1426 if (prom_initrd_start != 0) {
1427 args->rd_image = prom_initrd_start;
1428 args->rd_size = prom_initrd_end - args->rd_image;
1429 args->rd_loc = top_addr;
1430 top_addr = _ALIGN_UP(args->rd_loc + args->rd_size, align);
1431 }
1432
1433 /* Pickup an address for the HAL. We want to go really high
1434 * up to avoid problem with future kexecs. On the other hand
1435 * we don't want to be all over the TCEs on P5IOC2 machines
1436 * which are going to be up there too. We assume the machine
1437 * has plenty of memory, and we ask for the HAL for now to
1438 * be just below the 1G point, or above the initrd
1439 */
1440 opal_addr = _ALIGN_DOWN(0x40000000 - prom_opal_size, align);
1441 if (opal_addr < top_addr)
1442 opal_addr = top_addr;
1443 args->hal_addr = opal_addr;
1444
1445 /* Copy the command line to the kernel image */
1446 strlcpy(boot_command_line, prom_cmd_line,
1447 COMMAND_LINE_SIZE);
1448
1449 prom_debug(" k_image = 0x%lx\n", args->k_image);
1450 prom_debug(" k_size = 0x%lx\n", args->k_size);
1451 prom_debug(" k_entry = 0x%lx\n", args->k_entry);
1452 prom_debug(" k_entry2 = 0x%lx\n", args->k_entry2);
1453 prom_debug(" hal_addr = 0x%lx\n", args->hal_addr);
1454 prom_debug(" rd_image = 0x%lx\n", args->rd_image);
1455 prom_debug(" rd_size = 0x%lx\n", args->rd_size);
1456 prom_debug(" rd_loc = 0x%lx\n", args->rd_loc);
1457 prom_printf("Performing OPAL takeover,this can take a few minutes..\n");
1458 prom_close_stdin();
1459 mb();
1460 data->go = 1;
1461 for (;;)
1462 opal_do_takeover(args);
1463 }
1464 #endif /* __BIG_ENDIAN__ */
1465
1466 /*
1467 * Allocate room for and instantiate OPAL
1468 */
1469 static void __init prom_instantiate_opal(void)
1470 {
1471 phandle opal_node;
1472 ihandle opal_inst;
1473 u64 base, entry;
1474 u64 size = 0, align = 0x10000;
1475 __be64 val64;
1476 u32 rets[2];
1477
1478 prom_debug("prom_instantiate_opal: start...\n");
1479
1480 opal_node = call_prom("finddevice", 1, 1, ADDR("/ibm,opal"));
1481 prom_debug("opal_node: %x\n", opal_node);
1482 if (!PHANDLE_VALID(opal_node))
1483 return;
1484
1485 val64 = 0;
1486 prom_getprop(opal_node, "opal-runtime-size", &val64, sizeof(val64));
1487 size = be64_to_cpu(val64);
1488 if (size == 0)
1489 return;
1490 val64 = 0;
1491 prom_getprop(opal_node, "opal-runtime-alignment", &val64,sizeof(val64));
1492 align = be64_to_cpu(val64);
1493
1494 base = alloc_down(size, align, 0);
1495 if (base == 0) {
1496 prom_printf("OPAL allocation failed !\n");
1497 return;
1498 }
1499
1500 opal_inst = call_prom("open", 1, 1, ADDR("/ibm,opal"));
1501 if (!IHANDLE_VALID(opal_inst)) {
1502 prom_printf("opening opal package failed (%x)\n", opal_inst);
1503 return;
1504 }
1505
1506 prom_printf("instantiating opal at 0x%x...", base);
1507
1508 if (call_prom_ret("call-method", 4, 3, rets,
1509 ADDR("load-opal-runtime"),
1510 opal_inst,
1511 base >> 32, base & 0xffffffff) != 0
1512 || (rets[0] == 0 && rets[1] == 0)) {
1513 prom_printf(" failed\n");
1514 return;
1515 }
1516 entry = (((u64)rets[0]) << 32) | rets[1];
1517
1518 prom_printf(" done\n");
1519
1520 reserve_mem(base, size);
1521
1522 prom_debug("opal base = 0x%x\n", base);
1523 prom_debug("opal align = 0x%x\n", align);
1524 prom_debug("opal entry = 0x%x\n", entry);
1525 prom_debug("opal size = 0x%x\n", (long)size);
1526
1527 prom_setprop(opal_node, "/ibm,opal", "opal-base-address",
1528 &base, sizeof(base));
1529 prom_setprop(opal_node, "/ibm,opal", "opal-entry-address",
1530 &entry, sizeof(entry));
1531
1532 #ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
1533 prom_opal_base = base;
1534 prom_opal_entry = entry;
1535 #endif
1536 prom_debug("prom_instantiate_opal: end...\n");
1537 }
1538
1539 #endif /* CONFIG_PPC_POWERNV */
1540
1541 /*
1542 * Allocate room for and instantiate RTAS
1543 */
1544 static void __init prom_instantiate_rtas(void)
1545 {
1546 phandle rtas_node;
1547 ihandle rtas_inst;
1548 u32 base, entry = 0;
1549 __be32 val;
1550 u32 size = 0;
1551
1552 prom_debug("prom_instantiate_rtas: start...\n");
1553
1554 rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
1555 prom_debug("rtas_node: %x\n", rtas_node);
1556 if (!PHANDLE_VALID(rtas_node))
1557 return;
1558
1559 val = 0;
1560 prom_getprop(rtas_node, "rtas-size", &val, sizeof(size));
1561 size = be32_to_cpu(val);
1562 if (size == 0)
1563 return;
1564
1565 base = alloc_down(size, PAGE_SIZE, 0);
1566 if (base == 0)
1567 prom_panic("Could not allocate memory for RTAS\n");
1568
1569 rtas_inst = call_prom("open", 1, 1, ADDR("/rtas"));
1570 if (!IHANDLE_VALID(rtas_inst)) {
1571 prom_printf("opening rtas package failed (%x)\n", rtas_inst);
1572 return;
1573 }
1574
1575 prom_printf("instantiating rtas at 0x%x...", base);
1576
1577 if (call_prom_ret("call-method", 3, 2, &entry,
1578 ADDR("instantiate-rtas"),
1579 rtas_inst, base) != 0
1580 || entry == 0) {
1581 prom_printf(" failed\n");
1582 return;
1583 }
1584 prom_printf(" done\n");
1585
1586 reserve_mem(base, size);
1587
1588 val = cpu_to_be32(base);
1589 prom_setprop(rtas_node, "/rtas", "linux,rtas-base",
1590 &val, sizeof(val));
1591 val = cpu_to_be32(entry);
1592 prom_setprop(rtas_node, "/rtas", "linux,rtas-entry",
1593 &val, sizeof(val));
1594
1595 /* Check if it supports "query-cpu-stopped-state" */
1596 if (prom_getprop(rtas_node, "query-cpu-stopped-state",
1597 &val, sizeof(val)) != PROM_ERROR)
1598 rtas_has_query_cpu_stopped = true;
1599
1600 #if defined(CONFIG_PPC_POWERNV) && defined(__BIG_ENDIAN__)
1601 /* PowerVN takeover hack */
1602 prom_rtas_data = base;
1603 prom_rtas_entry = entry;
1604 prom_getprop(rtas_node, "start-cpu", &prom_rtas_start_cpu, 4);
1605 #endif
1606 prom_debug("rtas base = 0x%x\n", base);
1607 prom_debug("rtas entry = 0x%x\n", entry);
1608 prom_debug("rtas size = 0x%x\n", (long)size);
1609
1610 prom_debug("prom_instantiate_rtas: end...\n");
1611 }
1612
1613 #ifdef CONFIG_PPC64
1614 /*
1615 * Allocate room for and instantiate Stored Measurement Log (SML)
1616 */
1617 static void __init prom_instantiate_sml(void)
1618 {
1619 phandle ibmvtpm_node;
1620 ihandle ibmvtpm_inst;
1621 u32 entry = 0, size = 0;
1622 u64 base;
1623
1624 prom_debug("prom_instantiate_sml: start...\n");
1625
1626 ibmvtpm_node = call_prom("finddevice", 1, 1, ADDR("/ibm,vtpm"));
1627 prom_debug("ibmvtpm_node: %x\n", ibmvtpm_node);
1628 if (!PHANDLE_VALID(ibmvtpm_node))
1629 return;
1630
1631 ibmvtpm_inst = call_prom("open", 1, 1, ADDR("/ibm,vtpm"));
1632 if (!IHANDLE_VALID(ibmvtpm_inst)) {
1633 prom_printf("opening vtpm package failed (%x)\n", ibmvtpm_inst);
1634 return;
1635 }
1636
1637 if (call_prom_ret("call-method", 2, 2, &size,
1638 ADDR("sml-get-handover-size"),
1639 ibmvtpm_inst) != 0 || size == 0) {
1640 prom_printf("SML get handover size failed\n");
1641 return;
1642 }
1643
1644 base = alloc_down(size, PAGE_SIZE, 0);
1645 if (base == 0)
1646 prom_panic("Could not allocate memory for sml\n");
1647
1648 prom_printf("instantiating sml at 0x%x...", base);
1649
1650 if (call_prom_ret("call-method", 4, 2, &entry,
1651 ADDR("sml-handover"),
1652 ibmvtpm_inst, size, base) != 0 || entry == 0) {
1653 prom_printf("SML handover failed\n");
1654 return;
1655 }
1656 prom_printf(" done\n");
1657
1658 reserve_mem(base, size);
1659
1660 prom_setprop(ibmvtpm_node, "/ibm,vtpm", "linux,sml-base",
1661 &base, sizeof(base));
1662 prom_setprop(ibmvtpm_node, "/ibm,vtpm", "linux,sml-size",
1663 &size, sizeof(size));
1664
1665 prom_debug("sml base = 0x%x\n", base);
1666 prom_debug("sml size = 0x%x\n", (long)size);
1667
1668 prom_debug("prom_instantiate_sml: end...\n");
1669 }
1670
1671 /*
1672 * Allocate room for and initialize TCE tables
1673 */
1674 #ifdef __BIG_ENDIAN__
1675 static void __init prom_initialize_tce_table(void)
1676 {
1677 phandle node;
1678 ihandle phb_node;
1679 char compatible[64], type[64], model[64];
1680 char *path = prom_scratch;
1681 u64 base, align;
1682 u32 minalign, minsize;
1683 u64 tce_entry, *tce_entryp;
1684 u64 local_alloc_top, local_alloc_bottom;
1685 u64 i;
1686
1687 if (prom_iommu_off)
1688 return;
1689
1690 prom_debug("starting prom_initialize_tce_table\n");
1691
1692 /* Cache current top of allocs so we reserve a single block */
1693 local_alloc_top = alloc_top_high;
1694 local_alloc_bottom = local_alloc_top;
1695
1696 /* Search all nodes looking for PHBs. */
1697 for (node = 0; prom_next_node(&node); ) {
1698 compatible[0] = 0;
1699 type[0] = 0;
1700 model[0] = 0;
1701 prom_getprop(node, "compatible",
1702 compatible, sizeof(compatible));
1703 prom_getprop(node, "device_type", type, sizeof(type));
1704 prom_getprop(node, "model", model, sizeof(model));
1705
1706 if ((type[0] == 0) || (strstr(type, "pci") == NULL))
1707 continue;
1708
1709 /* Keep the old logic intact to avoid regression. */
1710 if (compatible[0] != 0) {
1711 if ((strstr(compatible, "python") == NULL) &&
1712 (strstr(compatible, "Speedwagon") == NULL) &&
1713 (strstr(compatible, "Winnipeg") == NULL))
1714 continue;
1715 } else if (model[0] != 0) {
1716 if ((strstr(model, "ython") == NULL) &&
1717 (strstr(model, "peedwagon") == NULL) &&
1718 (strstr(model, "innipeg") == NULL))
1719 continue;
1720 }
1721
1722 if (prom_getprop(node, "tce-table-minalign", &minalign,
1723 sizeof(minalign)) == PROM_ERROR)
1724 minalign = 0;
1725 if (prom_getprop(node, "tce-table-minsize", &minsize,
1726 sizeof(minsize)) == PROM_ERROR)
1727 minsize = 4UL << 20;
1728
1729 /*
1730 * Even though we read what OF wants, we just set the table
1731 * size to 4 MB. This is enough to map 2GB of PCI DMA space.
1732 * By doing this, we avoid the pitfalls of trying to DMA to
1733 * MMIO space and the DMA alias hole.
1734 *
1735 * On POWER4, firmware sets the TCE region by assuming
1736 * each TCE table is 8MB. Using this memory for anything
1737 * else will impact performance, so we always allocate 8MB.
1738 * Anton
1739 */
1740 if (pvr_version_is(PVR_POWER4) || pvr_version_is(PVR_POWER4p))
1741 minsize = 8UL << 20;
1742 else
1743 minsize = 4UL << 20;
1744
1745 /* Align to the greater of the align or size */
1746 align = max(minalign, minsize);
1747 base = alloc_down(minsize, align, 1);
1748 if (base == 0)
1749 prom_panic("ERROR, cannot find space for TCE table.\n");
1750 if (base < local_alloc_bottom)
1751 local_alloc_bottom = base;
1752
1753 /* It seems OF doesn't null-terminate the path :-( */
1754 memset(path, 0, PROM_SCRATCH_SIZE);
1755 /* Call OF to setup the TCE hardware */
1756 if (call_prom("package-to-path", 3, 1, node,
1757 path, PROM_SCRATCH_SIZE-1) == PROM_ERROR) {
1758 prom_printf("package-to-path failed\n");
1759 }
1760
1761 /* Save away the TCE table attributes for later use. */
1762 prom_setprop(node, path, "linux,tce-base", &base, sizeof(base));
1763 prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize));
1764
1765 prom_debug("TCE table: %s\n", path);
1766 prom_debug("\tnode = 0x%x\n", node);
1767 prom_debug("\tbase = 0x%x\n", base);
1768 prom_debug("\tsize = 0x%x\n", minsize);
1769
1770 /* Initialize the table to have a one-to-one mapping
1771 * over the allocated size.
1772 */
1773 tce_entryp = (u64 *)base;
1774 for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) {
1775 tce_entry = (i << PAGE_SHIFT);
1776 tce_entry |= 0x3;
1777 *tce_entryp = tce_entry;
1778 }
1779
1780 prom_printf("opening PHB %s", path);
1781 phb_node = call_prom("open", 1, 1, path);
1782 if (phb_node == 0)
1783 prom_printf("... failed\n");
1784 else
1785 prom_printf("... done\n");
1786
1787 call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"),
1788 phb_node, -1, minsize,
1789 (u32) base, (u32) (base >> 32));
1790 call_prom("close", 1, 0, phb_node);
1791 }
1792
1793 reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom);
1794
1795 /* These are only really needed if there is a memory limit in
1796 * effect, but we don't know so export them always. */
1797 prom_tce_alloc_start = local_alloc_bottom;
1798 prom_tce_alloc_end = local_alloc_top;
1799
1800 /* Flag the first invalid entry */
1801 prom_debug("ending prom_initialize_tce_table\n");
1802 }
1803 #endif /* __BIG_ENDIAN__ */
1804 #endif /* CONFIG_PPC64 */
1805
1806 /*
1807 * With CHRP SMP we need to use the OF to start the other processors.
1808 * We can't wait until smp_boot_cpus (the OF is trashed by then)
1809 * so we have to put the processors into a holding pattern controlled
1810 * by the kernel (not OF) before we destroy the OF.
1811 *
1812 * This uses a chunk of low memory, puts some holding pattern
1813 * code there and sends the other processors off to there until
1814 * smp_boot_cpus tells them to do something. The holding pattern
1815 * checks that address until its cpu # is there, when it is that
1816 * cpu jumps to __secondary_start(). smp_boot_cpus() takes care
1817 * of setting those values.
1818 *
1819 * We also use physical address 0x4 here to tell when a cpu
1820 * is in its holding pattern code.
1821 *
1822 * -- Cort
1823 */
1824 /*
1825 * We want to reference the copy of __secondary_hold_* in the
1826 * 0 - 0x100 address range
1827 */
1828 #define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff)
1829
1830 static void __init prom_hold_cpus(void)
1831 {
1832 unsigned long i;
1833 phandle node;
1834 char type[64];
1835 unsigned long *spinloop
1836 = (void *) LOW_ADDR(__secondary_hold_spinloop);
1837 unsigned long *acknowledge
1838 = (void *) LOW_ADDR(__secondary_hold_acknowledge);
1839 unsigned long secondary_hold = LOW_ADDR(__secondary_hold);
1840
1841 /*
1842 * On pseries, if RTAS supports "query-cpu-stopped-state",
1843 * we skip this stage, the CPUs will be started by the
1844 * kernel using RTAS.
1845 */
1846 if ((of_platform == PLATFORM_PSERIES ||
1847 of_platform == PLATFORM_PSERIES_LPAR) &&
1848 rtas_has_query_cpu_stopped) {
1849 prom_printf("prom_hold_cpus: skipped\n");
1850 return;
1851 }
1852
1853 prom_debug("prom_hold_cpus: start...\n");
1854 prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop);
1855 prom_debug(" 1) *spinloop = 0x%x\n", *spinloop);
1856 prom_debug(" 1) acknowledge = 0x%x\n",
1857 (unsigned long)acknowledge);
1858 prom_debug(" 1) *acknowledge = 0x%x\n", *acknowledge);
1859 prom_debug(" 1) secondary_hold = 0x%x\n", secondary_hold);
1860
1861 /* Set the common spinloop variable, so all of the secondary cpus
1862 * will block when they are awakened from their OF spinloop.
1863 * This must occur for both SMP and non SMP kernels, since OF will
1864 * be trashed when we move the kernel.
1865 */
1866 *spinloop = 0;
1867
1868 /* look for cpus */
1869 for (node = 0; prom_next_node(&node); ) {
1870 unsigned int cpu_no;
1871 __be32 reg;
1872
1873 type[0] = 0;
1874 prom_getprop(node, "device_type", type, sizeof(type));
1875 if (strcmp(type, "cpu") != 0)
1876 continue;
1877
1878 /* Skip non-configured cpus. */
1879 if (prom_getprop(node, "status", type, sizeof(type)) > 0)
1880 if (strcmp(type, "okay") != 0)
1881 continue;
1882
1883 reg = cpu_to_be32(-1); /* make sparse happy */
1884 prom_getprop(node, "reg", &reg, sizeof(reg));
1885 cpu_no = be32_to_cpu(reg);
1886
1887 prom_debug("cpu hw idx = %lu\n", cpu_no);
1888
1889 /* Init the acknowledge var which will be reset by
1890 * the secondary cpu when it awakens from its OF
1891 * spinloop.
1892 */
1893 *acknowledge = (unsigned long)-1;
1894
1895 if (cpu_no != prom.cpu) {
1896 /* Primary Thread of non-boot cpu or any thread */
1897 prom_printf("starting cpu hw idx %lu... ", cpu_no);
1898 call_prom("start-cpu", 3, 0, node,
1899 secondary_hold, cpu_no);
1900
1901 for (i = 0; (i < 100000000) &&
1902 (*acknowledge == ((unsigned long)-1)); i++ )
1903 mb();
1904
1905 if (*acknowledge == cpu_no)
1906 prom_printf("done\n");
1907 else
1908 prom_printf("failed: %x\n", *acknowledge);
1909 }
1910 #ifdef CONFIG_SMP
1911 else
1912 prom_printf("boot cpu hw idx %lu\n", cpu_no);
1913 #endif /* CONFIG_SMP */
1914 }
1915
1916 prom_debug("prom_hold_cpus: end...\n");
1917 }
1918
1919
1920 static void __init prom_init_client_services(unsigned long pp)
1921 {
1922 /* Get a handle to the prom entry point before anything else */
1923 prom_entry = pp;
1924
1925 /* get a handle for the stdout device */
1926 prom.chosen = call_prom("finddevice", 1, 1, ADDR("/chosen"));
1927 if (!PHANDLE_VALID(prom.chosen))
1928 prom_panic("cannot find chosen"); /* msg won't be printed :( */
1929
1930 /* get device tree root */
1931 prom.root = call_prom("finddevice", 1, 1, ADDR("/"));
1932 if (!PHANDLE_VALID(prom.root))
1933 prom_panic("cannot find device tree root"); /* msg won't be printed :( */
1934
1935 prom.mmumap = 0;
1936 }
1937
1938 #ifdef CONFIG_PPC32
1939 /*
1940 * For really old powermacs, we need to map things we claim.
1941 * For that, we need the ihandle of the mmu.
1942 * Also, on the longtrail, we need to work around other bugs.
1943 */
1944 static void __init prom_find_mmu(void)
1945 {
1946 phandle oprom;
1947 char version[64];
1948
1949 oprom = call_prom("finddevice", 1, 1, ADDR("/openprom"));
1950 if (!PHANDLE_VALID(oprom))
1951 return;
1952 if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0)
1953 return;
1954 version[sizeof(version) - 1] = 0;
1955 /* XXX might need to add other versions here */
1956 if (strcmp(version, "Open Firmware, 1.0.5") == 0)
1957 of_workarounds = OF_WA_CLAIM;
1958 else if (strncmp(version, "FirmWorks,3.", 12) == 0) {
1959 of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL;
1960 call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim");
1961 } else
1962 return;
1963 prom.memory = call_prom("open", 1, 1, ADDR("/memory"));
1964 prom_getprop(prom.chosen, "mmu", &prom.mmumap,
1965 sizeof(prom.mmumap));
1966 prom.mmumap = be32_to_cpu(prom.mmumap);
1967 if (!IHANDLE_VALID(prom.memory) || !IHANDLE_VALID(prom.mmumap))
1968 of_workarounds &= ~OF_WA_CLAIM; /* hmmm */
1969 }
1970 #else
1971 #define prom_find_mmu()
1972 #endif
1973
1974 static void __init prom_init_stdout(void)
1975 {
1976 char *path = of_stdout_device;
1977 char type[16];
1978 phandle stdout_node;
1979 __be32 val;
1980
1981 if (prom_getprop(prom.chosen, "stdout", &val, sizeof(val)) <= 0)
1982 prom_panic("cannot find stdout");
1983
1984 prom.stdout = be32_to_cpu(val);
1985
1986 /* Get the full OF pathname of the stdout device */
1987 memset(path, 0, 256);
1988 call_prom("instance-to-path", 3, 1, prom.stdout, path, 255);
1989 prom_printf("OF stdout device is: %s\n", of_stdout_device);
1990 prom_setprop(prom.chosen, "/chosen", "linux,stdout-path",
1991 path, strlen(path) + 1);
1992
1993 /* instance-to-package fails on PA-Semi */
1994 stdout_node = call_prom("instance-to-package", 1, 1, prom.stdout);
1995 if (stdout_node != PROM_ERROR) {
1996 val = cpu_to_be32(stdout_node);
1997 prom_setprop(prom.chosen, "/chosen", "linux,stdout-package",
1998 &val, sizeof(val));
1999
2000 /* If it's a display, note it */
2001 memset(type, 0, sizeof(type));
2002 prom_getprop(stdout_node, "device_type", type, sizeof(type));
2003 if (strcmp(type, "display") == 0)
2004 prom_setprop(stdout_node, path, "linux,boot-display", NULL, 0);
2005 }
2006 }
2007
2008 static int __init prom_find_machine_type(void)
2009 {
2010 char compat[256];
2011 int len, i = 0;
2012 #ifdef CONFIG_PPC64
2013 phandle rtas;
2014 int x;
2015 #endif
2016
2017 /* Look for a PowerMac or a Cell */
2018 len = prom_getprop(prom.root, "compatible",
2019 compat, sizeof(compat)-1);
2020 if (len > 0) {
2021 compat[len] = 0;
2022 while (i < len) {
2023 char *p = &compat[i];
2024 int sl = strlen(p);
2025 if (sl == 0)
2026 break;
2027 if (strstr(p, "Power Macintosh") ||
2028 strstr(p, "MacRISC"))
2029 return PLATFORM_POWERMAC;
2030 #ifdef CONFIG_PPC64
2031 /* We must make sure we don't detect the IBM Cell
2032 * blades as pSeries due to some firmware issues,
2033 * so we do it here.
2034 */
2035 if (strstr(p, "IBM,CBEA") ||
2036 strstr(p, "IBM,CPBW-1.0"))
2037 return PLATFORM_GENERIC;
2038 #endif /* CONFIG_PPC64 */
2039 i += sl + 1;
2040 }
2041 }
2042 #ifdef CONFIG_PPC64
2043 /* Try to detect OPAL */
2044 if (PHANDLE_VALID(call_prom("finddevice", 1, 1, ADDR("/ibm,opal"))))
2045 return PLATFORM_OPAL;
2046
2047 /* Try to figure out if it's an IBM pSeries or any other
2048 * PAPR compliant platform. We assume it is if :
2049 * - /device_type is "chrp" (please, do NOT use that for future
2050 * non-IBM designs !
2051 * - it has /rtas
2052 */
2053 len = prom_getprop(prom.root, "device_type",
2054 compat, sizeof(compat)-1);
2055 if (len <= 0)
2056 return PLATFORM_GENERIC;
2057 if (strcmp(compat, "chrp"))
2058 return PLATFORM_GENERIC;
2059
2060 /* Default to pSeries. We need to know if we are running LPAR */
2061 rtas = call_prom("finddevice", 1, 1, ADDR("/rtas"));
2062 if (!PHANDLE_VALID(rtas))
2063 return PLATFORM_GENERIC;
2064 x = prom_getproplen(rtas, "ibm,hypertas-functions");
2065 if (x != PROM_ERROR) {
2066 prom_debug("Hypertas detected, assuming LPAR !\n");
2067 return PLATFORM_PSERIES_LPAR;
2068 }
2069 return PLATFORM_PSERIES;
2070 #else
2071 return PLATFORM_GENERIC;
2072 #endif
2073 }
2074
2075 static int __init prom_set_color(ihandle ih, int i, int r, int g, int b)
2076 {
2077 return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r);
2078 }
2079
2080 /*
2081 * If we have a display that we don't know how to drive,
2082 * we will want to try to execute OF's open method for it
2083 * later. However, OF will probably fall over if we do that
2084 * we've taken over the MMU.
2085 * So we check whether we will need to open the display,
2086 * and if so, open it now.
2087 */
2088 static void __init prom_check_displays(void)
2089 {
2090 char type[16], *path;
2091 phandle node;
2092 ihandle ih;
2093 int i;
2094
2095 static unsigned char default_colors[] = {
2096 0x00, 0x00, 0x00,
2097 0x00, 0x00, 0xaa,
2098 0x00, 0xaa, 0x00,
2099 0x00, 0xaa, 0xaa,
2100 0xaa, 0x00, 0x00,
2101 0xaa, 0x00, 0xaa,
2102 0xaa, 0xaa, 0x00,
2103 0xaa, 0xaa, 0xaa,
2104 0x55, 0x55, 0x55,
2105 0x55, 0x55, 0xff,
2106 0x55, 0xff, 0x55,
2107 0x55, 0xff, 0xff,
2108 0xff, 0x55, 0x55,
2109 0xff, 0x55, 0xff,
2110 0xff, 0xff, 0x55,
2111 0xff, 0xff, 0xff
2112 };
2113 const unsigned char *clut;
2114
2115 prom_debug("Looking for displays\n");
2116 for (node = 0; prom_next_node(&node); ) {
2117 memset(type, 0, sizeof(type));
2118 prom_getprop(node, "device_type", type, sizeof(type));
2119 if (strcmp(type, "display") != 0)
2120 continue;
2121
2122 /* It seems OF doesn't null-terminate the path :-( */
2123 path = prom_scratch;
2124 memset(path, 0, PROM_SCRATCH_SIZE);
2125
2126 /*
2127 * leave some room at the end of the path for appending extra
2128 * arguments
2129 */
2130 if (call_prom("package-to-path", 3, 1, node, path,
2131 PROM_SCRATCH_SIZE-10) == PROM_ERROR)
2132 continue;
2133 prom_printf("found display : %s, opening... ", path);
2134
2135 ih = call_prom("open", 1, 1, path);
2136 if (ih == 0) {
2137 prom_printf("failed\n");
2138 continue;
2139 }
2140
2141 /* Success */
2142 prom_printf("done\n");
2143 prom_setprop(node, path, "linux,opened", NULL, 0);
2144
2145 /* Setup a usable color table when the appropriate
2146 * method is available. Should update this to set-colors */
2147 clut = default_colors;
2148 for (i = 0; i < 16; i++, clut += 3)
2149 if (prom_set_color(ih, i, clut[0], clut[1],
2150 clut[2]) != 0)
2151 break;
2152
2153 #ifdef CONFIG_LOGO_LINUX_CLUT224
2154 clut = PTRRELOC(logo_linux_clut224.clut);
2155 for (i = 0; i < logo_linux_clut224.clutsize; i++, clut += 3)
2156 if (prom_set_color(ih, i + 32, clut[0], clut[1],
2157 clut[2]) != 0)
2158 break;
2159 #endif /* CONFIG_LOGO_LINUX_CLUT224 */
2160
2161 #ifdef CONFIG_PPC_EARLY_DEBUG_BOOTX
2162 if (prom_getprop(node, "linux,boot-display", NULL, 0) !=
2163 PROM_ERROR) {
2164 u32 width, height, pitch, addr;
2165
2166 prom_printf("Setting btext !\n");
2167 prom_getprop(node, "width", &width, 4);
2168 prom_getprop(node, "height", &height, 4);
2169 prom_getprop(node, "linebytes", &pitch, 4);
2170 prom_getprop(node, "address", &addr, 4);
2171 prom_printf("W=%d H=%d LB=%d addr=0x%x\n",
2172 width, height, pitch, addr);
2173 btext_setup_display(width, height, 8, pitch, addr);
2174 }
2175 #endif /* CONFIG_PPC_EARLY_DEBUG_BOOTX */
2176 }
2177 }
2178
2179
2180 /* Return (relocated) pointer to this much memory: moves initrd if reqd. */
2181 static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end,
2182 unsigned long needed, unsigned long align)
2183 {
2184 void *ret;
2185
2186 *mem_start = _ALIGN(*mem_start, align);
2187 while ((*mem_start + needed) > *mem_end) {
2188 unsigned long room, chunk;
2189
2190 prom_debug("Chunk exhausted, claiming more at %x...\n",
2191 alloc_bottom);
2192 room = alloc_top - alloc_bottom;
2193 if (room > DEVTREE_CHUNK_SIZE)
2194 room = DEVTREE_CHUNK_SIZE;
2195 if (room < PAGE_SIZE)
2196 prom_panic("No memory for flatten_device_tree "
2197 "(no room)\n");
2198 chunk = alloc_up(room, 0);
2199 if (chunk == 0)
2200 prom_panic("No memory for flatten_device_tree "
2201 "(claim failed)\n");
2202 *mem_end = chunk + room;
2203 }
2204
2205 ret = (void *)*mem_start;
2206 *mem_start += needed;
2207
2208 return ret;
2209 }
2210
2211 #define dt_push_token(token, mem_start, mem_end) do { \
2212 void *room = make_room(mem_start, mem_end, 4, 4); \
2213 *(__be32 *)room = cpu_to_be32(token); \
2214 } while(0)
2215
2216 static unsigned long __init dt_find_string(char *str)
2217 {
2218 char *s, *os;
2219
2220 s = os = (char *)dt_string_start;
2221 s += 4;
2222 while (s < (char *)dt_string_end) {
2223 if (strcmp(s, str) == 0)
2224 return s - os;
2225 s += strlen(s) + 1;
2226 }
2227 return 0;
2228 }
2229
2230 /*
2231 * The Open Firmware 1275 specification states properties must be 31 bytes or
2232 * less, however not all firmwares obey this. Make it 64 bytes to be safe.
2233 */
2234 #define MAX_PROPERTY_NAME 64
2235
2236 static void __init scan_dt_build_strings(phandle node,
2237 unsigned long *mem_start,
2238 unsigned long *mem_end)
2239 {
2240 char *prev_name, *namep, *sstart;
2241 unsigned long soff;
2242 phandle child;
2243
2244 sstart = (char *)dt_string_start;
2245
2246 /* get and store all property names */
2247 prev_name = "";
2248 for (;;) {
2249 /* 64 is max len of name including nul. */
2250 namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1);
2251 if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) {
2252 /* No more nodes: unwind alloc */
2253 *mem_start = (unsigned long)namep;
2254 break;
2255 }
2256
2257 /* skip "name" */
2258 if (strcmp(namep, "name") == 0) {
2259 *mem_start = (unsigned long)namep;
2260 prev_name = "name";
2261 continue;
2262 }
2263 /* get/create string entry */
2264 soff = dt_find_string(namep);
2265 if (soff != 0) {
2266 *mem_start = (unsigned long)namep;
2267 namep = sstart + soff;
2268 } else {
2269 /* Trim off some if we can */
2270 *mem_start = (unsigned long)namep + strlen(namep) + 1;
2271 dt_string_end = *mem_start;
2272 }
2273 prev_name = namep;
2274 }
2275
2276 /* do all our children */
2277 child = call_prom("child", 1, 1, node);
2278 while (child != 0) {
2279 scan_dt_build_strings(child, mem_start, mem_end);
2280 child = call_prom("peer", 1, 1, child);
2281 }
2282 }
2283
2284 static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
2285 unsigned long *mem_end)
2286 {
2287 phandle child;
2288 char *namep, *prev_name, *sstart, *p, *ep, *lp, *path;
2289 unsigned long soff;
2290 unsigned char *valp;
2291 static char pname[MAX_PROPERTY_NAME];
2292 int l, room, has_phandle = 0;
2293
2294 dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end);
2295
2296 /* get the node's full name */
2297 namep = (char *)*mem_start;
2298 room = *mem_end - *mem_start;
2299 if (room > 255)
2300 room = 255;
2301 l = call_prom("package-to-path", 3, 1, node, namep, room);
2302 if (l >= 0) {
2303 /* Didn't fit? Get more room. */
2304 if (l >= room) {
2305 if (l >= *mem_end - *mem_start)
2306 namep = make_room(mem_start, mem_end, l+1, 1);
2307 call_prom("package-to-path", 3, 1, node, namep, l);
2308 }
2309 namep[l] = '\0';
2310
2311 /* Fixup an Apple bug where they have bogus \0 chars in the
2312 * middle of the path in some properties, and extract
2313 * the unit name (everything after the last '/').
2314 */
2315 for (lp = p = namep, ep = namep + l; p < ep; p++) {
2316 if (*p == '/')
2317 lp = namep;
2318 else if (*p != 0)
2319 *lp++ = *p;
2320 }
2321 *lp = 0;
2322 *mem_start = _ALIGN((unsigned long)lp + 1, 4);
2323 }
2324
2325 /* get it again for debugging */
2326 path = prom_scratch;
2327 memset(path, 0, PROM_SCRATCH_SIZE);
2328 call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1);
2329
2330 /* get and store all properties */
2331 prev_name = "";
2332 sstart = (char *)dt_string_start;
2333 for (;;) {
2334 if (call_prom("nextprop", 3, 1, node, prev_name,
2335 pname) != 1)
2336 break;
2337
2338 /* skip "name" */
2339 if (strcmp(pname, "name") == 0) {
2340 prev_name = "name";
2341 continue;
2342 }
2343
2344 /* find string offset */
2345 soff = dt_find_string(pname);
2346 if (soff == 0) {
2347 prom_printf("WARNING: Can't find string index for"
2348 " <%s>, node %s\n", pname, path);
2349 break;
2350 }
2351 prev_name = sstart + soff;
2352
2353 /* get length */
2354 l = call_prom("getproplen", 2, 1, node, pname);
2355
2356 /* sanity checks */
2357 if (l == PROM_ERROR)
2358 continue;
2359
2360 /* push property head */
2361 dt_push_token(OF_DT_PROP, mem_start, mem_end);
2362 dt_push_token(l, mem_start, mem_end);
2363 dt_push_token(soff, mem_start, mem_end);
2364
2365 /* push property content */
2366 valp = make_room(mem_start, mem_end, l, 4);
2367 call_prom("getprop", 4, 1, node, pname, valp, l);
2368 *mem_start = _ALIGN(*mem_start, 4);
2369
2370 if (!strcmp(pname, "phandle"))
2371 has_phandle = 1;
2372 }
2373
2374 /* Add a "linux,phandle" property if no "phandle" property already
2375 * existed (can happen with OPAL)
2376 */
2377 if (!has_phandle) {
2378 soff = dt_find_string("linux,phandle");
2379 if (soff == 0)
2380 prom_printf("WARNING: Can't find string index for"
2381 " <linux-phandle> node %s\n", path);
2382 else {
2383 dt_push_token(OF_DT_PROP, mem_start, mem_end);
2384 dt_push_token(4, mem_start, mem_end);
2385 dt_push_token(soff, mem_start, mem_end);
2386 valp = make_room(mem_start, mem_end, 4, 4);
2387 *(__be32 *)valp = cpu_to_be32(node);
2388 }
2389 }
2390
2391 /* do all our children */
2392 child = call_prom("child", 1, 1, node);
2393 while (child != 0) {
2394 scan_dt_build_struct(child, mem_start, mem_end);
2395 child = call_prom("peer", 1, 1, child);
2396 }
2397
2398 dt_push_token(OF_DT_END_NODE, mem_start, mem_end);
2399 }
2400
2401 static void __init flatten_device_tree(void)
2402 {
2403 phandle root;
2404 unsigned long mem_start, mem_end, room;
2405 struct boot_param_header *hdr;
2406 char *namep;
2407 u64 *rsvmap;
2408
2409 /*
2410 * Check how much room we have between alloc top & bottom (+/- a
2411 * few pages), crop to 1MB, as this is our "chunk" size
2412 */
2413 room = alloc_top - alloc_bottom - 0x4000;
2414 if (room > DEVTREE_CHUNK_SIZE)
2415 room = DEVTREE_CHUNK_SIZE;
2416 prom_debug("starting device tree allocs at %x\n", alloc_bottom);
2417
2418 /* Now try to claim that */
2419 mem_start = (unsigned long)alloc_up(room, PAGE_SIZE);
2420 if (mem_start == 0)
2421 prom_panic("Can't allocate initial device-tree chunk\n");
2422 mem_end = mem_start + room;
2423
2424 /* Get root of tree */
2425 root = call_prom("peer", 1, 1, (phandle)0);
2426 if (root == (phandle)0)
2427 prom_panic ("couldn't get device tree root\n");
2428
2429 /* Build header and make room for mem rsv map */
2430 mem_start = _ALIGN(mem_start, 4);
2431 hdr = make_room(&mem_start, &mem_end,
2432 sizeof(struct boot_param_header), 4);
2433 dt_header_start = (unsigned long)hdr;
2434 rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8);
2435
2436 /* Start of strings */
2437 mem_start = PAGE_ALIGN(mem_start);
2438 dt_string_start = mem_start;
2439 mem_start += 4; /* hole */
2440
2441 /* Add "linux,phandle" in there, we'll need it */
2442 namep = make_room(&mem_start, &mem_end, 16, 1);
2443 strcpy(namep, "linux,phandle");
2444 mem_start = (unsigned long)namep + strlen(namep) + 1;
2445
2446 /* Build string array */
2447 prom_printf("Building dt strings...\n");
2448 scan_dt_build_strings(root, &mem_start, &mem_end);
2449 dt_string_end = mem_start;
2450
2451 /* Build structure */
2452 mem_start = PAGE_ALIGN(mem_start);
2453 dt_struct_start = mem_start;
2454 prom_printf("Building dt structure...\n");
2455 scan_dt_build_struct(root, &mem_start, &mem_end);
2456 dt_push_token(OF_DT_END, &mem_start, &mem_end);
2457 dt_struct_end = PAGE_ALIGN(mem_start);
2458
2459 /* Finish header */
2460 hdr->boot_cpuid_phys = cpu_to_be32(prom.cpu);
2461 hdr->magic = cpu_to_be32(OF_DT_HEADER);
2462 hdr->totalsize = cpu_to_be32(dt_struct_end - dt_header_start);
2463 hdr->off_dt_struct = cpu_to_be32(dt_struct_start - dt_header_start);
2464 hdr->off_dt_strings = cpu_to_be32(dt_string_start - dt_header_start);
2465 hdr->dt_strings_size = cpu_to_be32(dt_string_end - dt_string_start);
2466 hdr->off_mem_rsvmap = cpu_to_be32(((unsigned long)rsvmap) - dt_header_start);
2467 hdr->version = cpu_to_be32(OF_DT_VERSION);
2468 /* Version 16 is not backward compatible */
2469 hdr->last_comp_version = cpu_to_be32(0x10);
2470
2471 /* Copy the reserve map in */
2472 memcpy(rsvmap, mem_reserve_map, sizeof(mem_reserve_map));
2473
2474 #ifdef DEBUG_PROM
2475 {
2476 int i;
2477 prom_printf("reserved memory map:\n");
2478 for (i = 0; i < mem_reserve_cnt; i++)
2479 prom_printf(" %x - %x\n",
2480 be64_to_cpu(mem_reserve_map[i].base),
2481 be64_to_cpu(mem_reserve_map[i].size));
2482 }
2483 #endif
2484 /* Bump mem_reserve_cnt to cause further reservations to fail
2485 * since it's too late.
2486 */
2487 mem_reserve_cnt = MEM_RESERVE_MAP_SIZE;
2488
2489 prom_printf("Device tree strings 0x%x -> 0x%x\n",
2490 dt_string_start, dt_string_end);
2491 prom_printf("Device tree struct 0x%x -> 0x%x\n",
2492 dt_struct_start, dt_struct_end);
2493 }
2494
2495 #ifdef CONFIG_PPC_MAPLE
2496 /* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property.
2497 * The values are bad, and it doesn't even have the right number of cells. */
2498 static void __init fixup_device_tree_maple(void)
2499 {
2500 phandle isa;
2501 u32 rloc = 0x01002000; /* IO space; PCI device = 4 */
2502 u32 isa_ranges[6];
2503 char *name;
2504
2505 name = "/ht@0/isa@4";
2506 isa = call_prom("finddevice", 1, 1, ADDR(name));
2507 if (!PHANDLE_VALID(isa)) {
2508 name = "/ht@0/isa@6";
2509 isa = call_prom("finddevice", 1, 1, ADDR(name));
2510 rloc = 0x01003000; /* IO space; PCI device = 6 */
2511 }
2512 if (!PHANDLE_VALID(isa))
2513 return;
2514
2515 if (prom_getproplen(isa, "ranges") != 12)
2516 return;
2517 if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges))
2518 == PROM_ERROR)
2519 return;
2520
2521 if (isa_ranges[0] != 0x1 ||
2522 isa_ranges[1] != 0xf4000000 ||
2523 isa_ranges[2] != 0x00010000)
2524 return;
2525
2526 prom_printf("Fixing up bogus ISA range on Maple/Apache...\n");
2527
2528 isa_ranges[0] = 0x1;
2529 isa_ranges[1] = 0x0;
2530 isa_ranges[2] = rloc;
2531 isa_ranges[3] = 0x0;
2532 isa_ranges[4] = 0x0;
2533 isa_ranges[5] = 0x00010000;
2534 prom_setprop(isa, name, "ranges",
2535 isa_ranges, sizeof(isa_ranges));
2536 }
2537
2538 #define CPC925_MC_START 0xf8000000
2539 #define CPC925_MC_LENGTH 0x1000000
2540 /* The values for memory-controller don't have right number of cells */
2541 static void __init fixup_device_tree_maple_memory_controller(void)
2542 {
2543 phandle mc;
2544 u32 mc_reg[4];
2545 char *name = "/hostbridge@f8000000";
2546 u32 ac, sc;
2547
2548 mc = call_prom("finddevice", 1, 1, ADDR(name));
2549 if (!PHANDLE_VALID(mc))
2550 return;
2551
2552 if (prom_getproplen(mc, "reg") != 8)
2553 return;
2554
2555 prom_getprop(prom.root, "#address-cells", &ac, sizeof(ac));
2556 prom_getprop(prom.root, "#size-cells", &sc, sizeof(sc));
2557 if ((ac != 2) || (sc != 2))
2558 return;
2559
2560 if (prom_getprop(mc, "reg", mc_reg, sizeof(mc_reg)) == PROM_ERROR)
2561 return;
2562
2563 if (mc_reg[0] != CPC925_MC_START || mc_reg[1] != CPC925_MC_LENGTH)
2564 return;
2565
2566 prom_printf("Fixing up bogus hostbridge on Maple...\n");
2567
2568 mc_reg[0] = 0x0;
2569 mc_reg[1] = CPC925_MC_START;
2570 mc_reg[2] = 0x0;
2571 mc_reg[3] = CPC925_MC_LENGTH;
2572 prom_setprop(mc, name, "reg", mc_reg, sizeof(mc_reg));
2573 }
2574 #else
2575 #define fixup_device_tree_maple()
2576 #define fixup_device_tree_maple_memory_controller()
2577 #endif
2578
2579 #ifdef CONFIG_PPC_CHRP
2580 /*
2581 * Pegasos and BriQ lacks the "ranges" property in the isa node
2582 * Pegasos needs decimal IRQ 14/15, not hexadecimal
2583 * Pegasos has the IDE configured in legacy mode, but advertised as native
2584 */
2585 static void __init fixup_device_tree_chrp(void)
2586 {
2587 phandle ph;
2588 u32 prop[6];
2589 u32 rloc = 0x01006000; /* IO space; PCI device = 12 */
2590 char *name;
2591 int rc;
2592
2593 name = "/pci@80000000/isa@c";
2594 ph = call_prom("finddevice", 1, 1, ADDR(name));
2595 if (!PHANDLE_VALID(ph)) {
2596 name = "/pci@ff500000/isa@6";
2597 ph = call_prom("finddevice", 1, 1, ADDR(name));
2598 rloc = 0x01003000; /* IO space; PCI device = 6 */
2599 }
2600 if (PHANDLE_VALID(ph)) {
2601 rc = prom_getproplen(ph, "ranges");
2602 if (rc == 0 || rc == PROM_ERROR) {
2603 prom_printf("Fixing up missing ISA range on Pegasos...\n");
2604
2605 prop[0] = 0x1;
2606 prop[1] = 0x0;
2607 prop[2] = rloc;
2608 prop[3] = 0x0;
2609 prop[4] = 0x0;
2610 prop[5] = 0x00010000;
2611 prom_setprop(ph, name, "ranges", prop, sizeof(prop));
2612 }
2613 }
2614
2615 name = "/pci@80000000/ide@C,1";
2616 ph = call_prom("finddevice", 1, 1, ADDR(name));
2617 if (PHANDLE_VALID(ph)) {
2618 prom_printf("Fixing up IDE interrupt on Pegasos...\n");
2619 prop[0] = 14;
2620 prop[1] = 0x0;
2621 prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32));
2622 prom_printf("Fixing up IDE class-code on Pegasos...\n");
2623 rc = prom_getprop(ph, "class-code", prop, sizeof(u32));
2624 if (rc == sizeof(u32)) {
2625 prop[0] &= ~0x5;
2626 prom_setprop(ph, name, "class-code", prop, sizeof(u32));
2627 }
2628 }
2629 }
2630 #else
2631 #define fixup_device_tree_chrp()
2632 #endif
2633
2634 #if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)
2635 static void __init fixup_device_tree_pmac(void)
2636 {
2637 phandle u3, i2c, mpic;
2638 u32 u3_rev;
2639 u32 interrupts[2];
2640 u32 parent;
2641
2642 /* Some G5s have a missing interrupt definition, fix it up here */
2643 u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000"));
2644 if (!PHANDLE_VALID(u3))
2645 return;
2646 i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000"));
2647 if (!PHANDLE_VALID(i2c))
2648 return;
2649 mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000"));
2650 if (!PHANDLE_VALID(mpic))
2651 return;
2652
2653 /* check if proper rev of u3 */
2654 if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev))
2655 == PROM_ERROR)
2656 return;
2657 if (u3_rev < 0x35 || u3_rev > 0x39)
2658 return;
2659 /* does it need fixup ? */
2660 if (prom_getproplen(i2c, "interrupts") > 0)
2661 return;
2662
2663 prom_printf("fixing up bogus interrupts for u3 i2c...\n");
2664
2665 /* interrupt on this revision of u3 is number 0 and level */
2666 interrupts[0] = 0;
2667 interrupts[1] = 1;
2668 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts",
2669 &interrupts, sizeof(interrupts));
2670 parent = (u32)mpic;
2671 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent",
2672 &parent, sizeof(parent));
2673 }
2674 #else
2675 #define fixup_device_tree_pmac()
2676 #endif
2677
2678 #ifdef CONFIG_PPC_EFIKA
2679 /*
2680 * The MPC5200 FEC driver requires an phy-handle property to tell it how
2681 * to talk to the phy. If the phy-handle property is missing, then this
2682 * function is called to add the appropriate nodes and link it to the
2683 * ethernet node.
2684 */
2685 static void __init fixup_device_tree_efika_add_phy(void)
2686 {
2687 u32 node;
2688 char prop[64];
2689 int rv;
2690
2691 /* Check if /builtin/ethernet exists - bail if it doesn't */
2692 node = call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet"));
2693 if (!PHANDLE_VALID(node))
2694 return;
2695
2696 /* Check if the phy-handle property exists - bail if it does */
2697 rv = prom_getprop(node, "phy-handle", prop, sizeof(prop));
2698 if (!rv)
2699 return;
2700
2701 /*
2702 * At this point the ethernet device doesn't have a phy described.
2703 * Now we need to add the missing phy node and linkage
2704 */
2705
2706 /* Check for an MDIO bus node - if missing then create one */
2707 node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio"));
2708 if (!PHANDLE_VALID(node)) {
2709 prom_printf("Adding Ethernet MDIO node\n");
2710 call_prom("interpret", 1, 1,
2711 " s\" /builtin\" find-device"
2712 " new-device"
2713 " 1 encode-int s\" #address-cells\" property"
2714 " 0 encode-int s\" #size-cells\" property"
2715 " s\" mdio\" device-name"
2716 " s\" fsl,mpc5200b-mdio\" encode-string"
2717 " s\" compatible\" property"
2718 " 0xf0003000 0x400 reg"
2719 " 0x2 encode-int"
2720 " 0x5 encode-int encode+"
2721 " 0x3 encode-int encode+"
2722 " s\" interrupts\" property"
2723 " finish-device");
2724 };
2725
2726 /* Check for a PHY device node - if missing then create one and
2727 * give it's phandle to the ethernet node */
2728 node = call_prom("finddevice", 1, 1,
2729 ADDR("/builtin/mdio/ethernet-phy"));
2730 if (!PHANDLE_VALID(node)) {
2731 prom_printf("Adding Ethernet PHY node\n");
2732 call_prom("interpret", 1, 1,
2733 " s\" /builtin/mdio\" find-device"
2734 " new-device"
2735 " s\" ethernet-phy\" device-name"
2736 " 0x10 encode-int s\" reg\" property"
2737 " my-self"
2738 " ihandle>phandle"
2739 " finish-device"
2740 " s\" /builtin/ethernet\" find-device"
2741 " encode-int"
2742 " s\" phy-handle\" property"
2743 " device-end");
2744 }
2745 }
2746
2747 static void __init fixup_device_tree_efika(void)
2748 {
2749 int sound_irq[3] = { 2, 2, 0 };
2750 int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0,
2751 3,4,0, 3,5,0, 3,6,0, 3,7,0,
2752 3,8,0, 3,9,0, 3,10,0, 3,11,0,
2753 3,12,0, 3,13,0, 3,14,0, 3,15,0 };
2754 u32 node;
2755 char prop[64];
2756 int rv, len;
2757
2758 /* Check if we're really running on a EFIKA */
2759 node = call_prom("finddevice", 1, 1, ADDR("/"));
2760 if (!PHANDLE_VALID(node))
2761 return;
2762
2763 rv = prom_getprop(node, "model", prop, sizeof(prop));
2764 if (rv == PROM_ERROR)
2765 return;
2766 if (strcmp(prop, "EFIKA5K2"))
2767 return;
2768
2769 prom_printf("Applying EFIKA device tree fixups\n");
2770
2771 /* Claiming to be 'chrp' is death */
2772 node = call_prom("finddevice", 1, 1, ADDR("/"));
2773 rv = prom_getprop(node, "device_type", prop, sizeof(prop));
2774 if (rv != PROM_ERROR && (strcmp(prop, "chrp") == 0))
2775 prom_setprop(node, "/", "device_type", "efika", sizeof("efika"));
2776
2777 /* CODEGEN,description is exposed in /proc/cpuinfo so
2778 fix that too */
2779 rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop));
2780 if (rv != PROM_ERROR && (strstr(prop, "CHRP")))
2781 prom_setprop(node, "/", "CODEGEN,description",
2782 "Efika 5200B PowerPC System",
2783 sizeof("Efika 5200B PowerPC System"));
2784
2785 /* Fixup bestcomm interrupts property */
2786 node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm"));
2787 if (PHANDLE_VALID(node)) {
2788 len = prom_getproplen(node, "interrupts");
2789 if (len == 12) {
2790 prom_printf("Fixing bestcomm interrupts property\n");
2791 prom_setprop(node, "/builtin/bestcom", "interrupts",
2792 bcomm_irq, sizeof(bcomm_irq));
2793 }
2794 }
2795
2796 /* Fixup sound interrupts property */
2797 node = call_prom("finddevice", 1, 1, ADDR("/builtin/sound"));
2798 if (PHANDLE_VALID(node)) {
2799 rv = prom_getprop(node, "interrupts", prop, sizeof(prop));
2800 if (rv == PROM_ERROR) {
2801 prom_printf("Adding sound interrupts property\n");
2802 prom_setprop(node, "/builtin/sound", "interrupts",
2803 sound_irq, sizeof(sound_irq));
2804 }
2805 }
2806
2807 /* Make sure ethernet phy-handle property exists */
2808 fixup_device_tree_efika_add_phy();
2809 }
2810 #else
2811 #define fixup_device_tree_efika()
2812 #endif
2813
2814 static void __init fixup_device_tree(void)
2815 {
2816 fixup_device_tree_maple();
2817 fixup_device_tree_maple_memory_controller();
2818 fixup_device_tree_chrp();
2819 fixup_device_tree_pmac();
2820 fixup_device_tree_efika();
2821 }
2822
2823 static void __init prom_find_boot_cpu(void)
2824 {
2825 __be32 rval;
2826 ihandle prom_cpu;
2827 phandle cpu_pkg;
2828
2829 rval = 0;
2830 if (prom_getprop(prom.chosen, "cpu", &rval, sizeof(rval)) <= 0)
2831 return;
2832 prom_cpu = be32_to_cpu(rval);
2833
2834 cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu);
2835
2836 prom_getprop(cpu_pkg, "reg", &rval, sizeof(rval));
2837 prom.cpu = be32_to_cpu(rval);
2838
2839 prom_debug("Booting CPU hw index = %lu\n", prom.cpu);
2840 }
2841
2842 static void __init prom_check_initrd(unsigned long r3, unsigned long r4)
2843 {
2844 #ifdef CONFIG_BLK_DEV_INITRD
2845 if (r3 && r4 && r4 != 0xdeadbeef) {
2846 __be64 val;
2847
2848 prom_initrd_start = is_kernel_addr(r3) ? __pa(r3) : r3;
2849 prom_initrd_end = prom_initrd_start + r4;
2850
2851 val = cpu_to_be64(prom_initrd_start);
2852 prom_setprop(prom.chosen, "/chosen", "linux,initrd-start",
2853 &val, sizeof(val));
2854 val = cpu_to_be64(prom_initrd_end);
2855 prom_setprop(prom.chosen, "/chosen", "linux,initrd-end",
2856 &val, sizeof(val));
2857
2858 reserve_mem(prom_initrd_start,
2859 prom_initrd_end - prom_initrd_start);
2860
2861 prom_debug("initrd_start=0x%x\n", prom_initrd_start);
2862 prom_debug("initrd_end=0x%x\n", prom_initrd_end);
2863 }
2864 #endif /* CONFIG_BLK_DEV_INITRD */
2865 }
2866
2867 #ifdef CONFIG_PPC64
2868 #ifdef CONFIG_RELOCATABLE
2869 static void reloc_toc(void)
2870 {
2871 }
2872
2873 static void unreloc_toc(void)
2874 {
2875 }
2876 #else
2877 static void __reloc_toc(unsigned long offset, unsigned long nr_entries)
2878 {
2879 unsigned long i;
2880 unsigned long *toc_entry;
2881
2882 /* Get the start of the TOC by using r2 directly. */
2883 asm volatile("addi %0,2,-0x8000" : "=b" (toc_entry));
2884
2885 for (i = 0; i < nr_entries; i++) {
2886 *toc_entry = *toc_entry + offset;
2887 toc_entry++;
2888 }
2889 }
2890
2891 static void reloc_toc(void)
2892 {
2893 unsigned long offset = reloc_offset();
2894 unsigned long nr_entries =
2895 (__prom_init_toc_end - __prom_init_toc_start) / sizeof(long);
2896
2897 __reloc_toc(offset, nr_entries);
2898
2899 mb();
2900 }
2901
2902 static void unreloc_toc(void)
2903 {
2904 unsigned long offset = reloc_offset();
2905 unsigned long nr_entries =
2906 (__prom_init_toc_end - __prom_init_toc_start) / sizeof(long);
2907
2908 mb();
2909
2910 __reloc_toc(-offset, nr_entries);
2911 }
2912 #endif
2913 #endif
2914
2915 /*
2916 * We enter here early on, when the Open Firmware prom is still
2917 * handling exceptions and the MMU hash table for us.
2918 */
2919
2920 unsigned long __init prom_init(unsigned long r3, unsigned long r4,
2921 unsigned long pp,
2922 unsigned long r6, unsigned long r7,
2923 unsigned long kbase)
2924 {
2925 unsigned long hdr;
2926
2927 #ifdef CONFIG_PPC32
2928 unsigned long offset = reloc_offset();
2929 reloc_got2(offset);
2930 #else
2931 reloc_toc();
2932 #endif
2933
2934 /*
2935 * First zero the BSS
2936 */
2937 memset(&__bss_start, 0, __bss_stop - __bss_start);
2938
2939 /*
2940 * Init interface to Open Firmware, get some node references,
2941 * like /chosen
2942 */
2943 prom_init_client_services(pp);
2944
2945 /*
2946 * See if this OF is old enough that we need to do explicit maps
2947 * and other workarounds
2948 */
2949 prom_find_mmu();
2950
2951 /*
2952 * Init prom stdout device
2953 */
2954 prom_init_stdout();
2955
2956 prom_printf("Preparing to boot %s", linux_banner);
2957
2958 /*
2959 * Get default machine type. At this point, we do not differentiate
2960 * between pSeries SMP and pSeries LPAR
2961 */
2962 of_platform = prom_find_machine_type();
2963 prom_printf("Detected machine type: %x\n", of_platform);
2964
2965 #ifndef CONFIG_NONSTATIC_KERNEL
2966 /* Bail if this is a kdump kernel. */
2967 if (PHYSICAL_START > 0)
2968 prom_panic("Error: You can't boot a kdump kernel from OF!\n");
2969 #endif
2970
2971 /*
2972 * Check for an initrd
2973 */
2974 prom_check_initrd(r3, r4);
2975
2976 #if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
2977 /*
2978 * On pSeries, inform the firmware about our capabilities
2979 */
2980 if (of_platform == PLATFORM_PSERIES ||
2981 of_platform == PLATFORM_PSERIES_LPAR)
2982 prom_send_capabilities();
2983 #endif
2984
2985 /*
2986 * Copy the CPU hold code
2987 */
2988 if (of_platform != PLATFORM_POWERMAC)
2989 copy_and_flush(0, kbase, 0x100, 0);
2990
2991 /*
2992 * Do early parsing of command line
2993 */
2994 early_cmdline_parse();
2995
2996 /*
2997 * Initialize memory management within prom_init
2998 */
2999 prom_init_mem();
3000
3001 /*
3002 * Determine which cpu is actually running right _now_
3003 */
3004 prom_find_boot_cpu();
3005
3006 /*
3007 * Initialize display devices
3008 */
3009 prom_check_displays();
3010
3011 #if defined(CONFIG_PPC64) && defined(__BIG_ENDIAN__)
3012 /*
3013 * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else
3014 * that uses the allocator, we need to make sure we get the top of memory
3015 * available for us here...
3016 */
3017 if (of_platform == PLATFORM_PSERIES)
3018 prom_initialize_tce_table();
3019 #endif
3020
3021 /*
3022 * On non-powermacs, try to instantiate RTAS. PowerMacs don't
3023 * have a usable RTAS implementation.
3024 */
3025 if (of_platform != PLATFORM_POWERMAC &&
3026 of_platform != PLATFORM_OPAL)
3027 prom_instantiate_rtas();
3028
3029 #ifdef CONFIG_PPC_POWERNV
3030 #ifdef __BIG_ENDIAN__
3031 /* Detect HAL and try instanciating it & doing takeover */
3032 if (of_platform == PLATFORM_PSERIES_LPAR) {
3033 prom_query_opal();
3034 if (of_platform == PLATFORM_OPAL) {
3035 prom_opal_hold_cpus();
3036 prom_opal_takeover();
3037 }
3038 } else
3039 #endif /* __BIG_ENDIAN__ */
3040 if (of_platform == PLATFORM_OPAL)
3041 prom_instantiate_opal();
3042 #endif /* CONFIG_PPC_POWERNV */
3043
3044 #ifdef CONFIG_PPC64
3045 /* instantiate sml */
3046 prom_instantiate_sml();
3047 #endif
3048
3049 /*
3050 * On non-powermacs, put all CPUs in spin-loops.
3051 *
3052 * PowerMacs use a different mechanism to spin CPUs
3053 *
3054 * (This must be done after instanciating RTAS)
3055 */
3056 if (of_platform != PLATFORM_POWERMAC &&
3057 of_platform != PLATFORM_OPAL)
3058 prom_hold_cpus();
3059
3060 /*
3061 * Fill in some infos for use by the kernel later on
3062 */
3063 if (prom_memory_limit) {
3064 __be64 val = cpu_to_be64(prom_memory_limit);
3065 prom_setprop(prom.chosen, "/chosen", "linux,memory-limit",
3066 &val, sizeof(val));
3067 }
3068 #ifdef CONFIG_PPC64
3069 if (prom_iommu_off)
3070 prom_setprop(prom.chosen, "/chosen", "linux,iommu-off",
3071 NULL, 0);
3072
3073 if (prom_iommu_force_on)
3074 prom_setprop(prom.chosen, "/chosen", "linux,iommu-force-on",
3075 NULL, 0);
3076
3077 if (prom_tce_alloc_start) {
3078 prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-start",
3079 &prom_tce_alloc_start,
3080 sizeof(prom_tce_alloc_start));
3081 prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-end",
3082 &prom_tce_alloc_end,
3083 sizeof(prom_tce_alloc_end));
3084 }
3085 #endif
3086
3087 /*
3088 * Fixup any known bugs in the device-tree
3089 */
3090 fixup_device_tree();
3091
3092 /*
3093 * Now finally create the flattened device-tree
3094 */
3095 prom_printf("copying OF device tree...\n");
3096 flatten_device_tree();
3097
3098 /*
3099 * in case stdin is USB and still active on IBM machines...
3100 * Unfortunately quiesce crashes on some powermacs if we have
3101 * closed stdin already (in particular the powerbook 101). It
3102 * appears that the OPAL version of OFW doesn't like it either.
3103 */
3104 if (of_platform != PLATFORM_POWERMAC &&
3105 of_platform != PLATFORM_OPAL)
3106 prom_close_stdin();
3107
3108 /*
3109 * Call OF "quiesce" method to shut down pending DMA's from
3110 * devices etc...
3111 */
3112 prom_printf("Calling quiesce...\n");
3113 call_prom("quiesce", 0, 0);
3114
3115 /*
3116 * And finally, call the kernel passing it the flattened device
3117 * tree and NULL as r5, thus triggering the new entry point which
3118 * is common to us and kexec
3119 */
3120 hdr = dt_header_start;
3121
3122 /* Don't print anything after quiesce under OPAL, it crashes OFW */
3123 if (of_platform != PLATFORM_OPAL) {
3124 prom_printf("returning from prom_init\n");
3125 prom_debug("->dt_header_start=0x%x\n", hdr);
3126 }
3127
3128 #ifdef CONFIG_PPC32
3129 reloc_got2(-offset);
3130 #else
3131 unreloc_toc();
3132 #endif
3133
3134 #ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
3135 /* OPAL early debug gets the OPAL base & entry in r8 and r9 */
3136 __start(hdr, kbase, 0, 0, 0,
3137 prom_opal_base, prom_opal_entry);
3138 #else
3139 __start(hdr, kbase, 0, 0, 0, 0, 0);
3140 #endif
3141
3142 return 0;
3143 }
Linux with added FPC-III support