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Merge branch 'fixes-modulesplit' into fixes
[zen-stable.git] / arch / powerpc / kernel / prom_init.c
blobb4fa66127495286aa6d4e7030480492f2b6bf90b
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/system.h>
39 #include <asm/mmu.h>
40 #include <asm/pgtable.h>
41 #include <asm/pci.h>
42 #include <asm/iommu.h>
43 #include <asm/btext.h>
44 #include <asm/sections.h>
45 #include <asm/machdep.h>
46 #include <asm/opal.h>
47
48 #include <linux/linux_logo.h>
49
50 /*
51 * Properties whose value is longer than this get excluded from our
52 * copy of the device tree. This value does need to be big enough to
53 * ensure that we don't lose things like the interrupt-map property
54 * on a PCI-PCI bridge.
55 */
56 #define MAX_PROPERTY_LENGTH (1UL * 1024 * 1024)
57
58 /*
59 * Eventually bump that one up
60 */
61 #define DEVTREE_CHUNK_SIZE 0x100000
62
63 /*
64 * This is the size of the local memory reserve map that gets copied
65 * into the boot params passed to the kernel. That size is totally
66 * flexible as the kernel just reads the list until it encounters an
67 * entry with size 0, so it can be changed without breaking binary
68 * compatibility
69 */
70 #define MEM_RESERVE_MAP_SIZE 8
71
72 /*
73 * prom_init() is called very early on, before the kernel text
74 * and data have been mapped to KERNELBASE. At this point the code
75 * is running at whatever address it has been loaded at.
76 * On ppc32 we compile with -mrelocatable, which means that references
77 * to extern and static variables get relocated automatically.
78 * On ppc64 we have to relocate the references explicitly with
79 * RELOC. (Note that strings count as static variables.)
80 *
81 * Because OF may have mapped I/O devices into the area starting at
82 * KERNELBASE, particularly on CHRP machines, we can't safely call
83 * OF once the kernel has been mapped to KERNELBASE. Therefore all
84 * OF calls must be done within prom_init().
85 *
86 * ADDR is used in calls to call_prom. The 4th and following
87 * arguments to call_prom should be 32-bit values.
88 * On ppc64, 64 bit values are truncated to 32 bits (and
89 * fortunately don't get interpreted as two arguments).
90 */
91 #ifdef CONFIG_PPC64
92 #define RELOC(x) (*PTRRELOC(&(x)))
93 #define ADDR(x) (u32) add_reloc_offset((unsigned long)(x))
94 #define OF_WORKAROUNDS 0
95 #else
96 #define RELOC(x) (x)
97 #define ADDR(x) (u32) (x)
98 #define OF_WORKAROUNDS of_workarounds
99 int of_workarounds;
100 #endif
101
102 #define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */
103 #define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */
104
105 #define PROM_BUG() do { \
106 prom_printf("kernel BUG at %s line 0x%x!\n", \
107 RELOC(__FILE__), __LINE__); \
108 __asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \
109 } while (0)
110
111 #ifdef DEBUG_PROM
112 #define prom_debug(x...) prom_printf(x)
113 #else
114 #define prom_debug(x...)
115 #endif
116
117
118 typedef u32 prom_arg_t;
119
120 struct prom_args {
121 u32 service;
122 u32 nargs;
123 u32 nret;
124 prom_arg_t args[10];
125 };
126
127 struct prom_t {
128 ihandle root;
129 phandle chosen;
130 int cpu;
131 ihandle stdout;
132 ihandle mmumap;
133 ihandle memory;
134 };
135
136 struct mem_map_entry {
137 u64 base;
138 u64 size;
139 };
140
141 typedef u32 cell_t;
142
143 extern void __start(unsigned long r3, unsigned long r4, unsigned long r5,
144 unsigned long r6, unsigned long r7, unsigned long r8,
145 unsigned long r9);
146
147 #ifdef CONFIG_PPC64
148 extern int enter_prom(struct prom_args *args, unsigned long entry);
149 #else
150 static inline int enter_prom(struct prom_args *args, unsigned long entry)
151 {
152 return ((int (*)(struct prom_args *))entry)(args);
153 }
154 #endif
155
156 extern void copy_and_flush(unsigned long dest, unsigned long src,
157 unsigned long size, unsigned long offset);
158
159 /* prom structure */
160 static struct prom_t __initdata prom;
161
162 static unsigned long prom_entry __initdata;
163
164 #define PROM_SCRATCH_SIZE 256
165
166 static char __initdata of_stdout_device[256];
167 static char __initdata prom_scratch[PROM_SCRATCH_SIZE];
168
169 static unsigned long __initdata dt_header_start;
170 static unsigned long __initdata dt_struct_start, dt_struct_end;
171 static unsigned long __initdata dt_string_start, dt_string_end;
172
173 static unsigned long __initdata prom_initrd_start, prom_initrd_end;
174
175 #ifdef CONFIG_PPC64
176 static int __initdata prom_iommu_force_on;
177 static int __initdata prom_iommu_off;
178 static unsigned long __initdata prom_tce_alloc_start;
179 static unsigned long __initdata prom_tce_alloc_end;
180 #endif
181
182 /* Platforms codes are now obsolete in the kernel. Now only used within this
183 * file and ultimately gone too. Feel free to change them if you need, they
184 * are not shared with anything outside of this file anymore
185 */
186 #define PLATFORM_PSERIES 0x0100
187 #define PLATFORM_PSERIES_LPAR 0x0101
188 #define PLATFORM_LPAR 0x0001
189 #define PLATFORM_POWERMAC 0x0400
190 #define PLATFORM_GENERIC 0x0500
191 #define PLATFORM_OPAL 0x0600
192
193 static int __initdata of_platform;
194
195 static char __initdata prom_cmd_line[COMMAND_LINE_SIZE];
196
197 static unsigned long __initdata prom_memory_limit;
198
199 static unsigned long __initdata alloc_top;
200 static unsigned long __initdata alloc_top_high;
201 static unsigned long __initdata alloc_bottom;
202 static unsigned long __initdata rmo_top;
203 static unsigned long __initdata ram_top;
204
205 static struct mem_map_entry __initdata mem_reserve_map[MEM_RESERVE_MAP_SIZE];
206 static int __initdata mem_reserve_cnt;
207
208 static cell_t __initdata regbuf[1024];
209
210
211 /*
212 * Error results ... some OF calls will return "-1" on error, some
213 * will return 0, some will return either. To simplify, here are
214 * macros to use with any ihandle or phandle return value to check if
215 * it is valid
216 */
217
218 #define PROM_ERROR (-1u)
219 #define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR)
220 #define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR)
221
222
223 /* This is the one and *ONLY* place where we actually call open
224 * firmware.
225 */
226
227 static int __init call_prom(const char *service, int nargs, int nret, ...)
228 {
229 int i;
230 struct prom_args args;
231 va_list list;
232
233 args.service = ADDR(service);
234 args.nargs = nargs;
235 args.nret = nret;
236
237 va_start(list, nret);
238 for (i = 0; i < nargs; i++)
239 args.args[i] = va_arg(list, prom_arg_t);
240 va_end(list);
241
242 for (i = 0; i < nret; i++)
243 args.args[nargs+i] = 0;
244
245 if (enter_prom(&args, RELOC(prom_entry)) < 0)
246 return PROM_ERROR;
247
248 return (nret > 0) ? args.args[nargs] : 0;
249 }
250
251 static int __init call_prom_ret(const char *service, int nargs, int nret,
252 prom_arg_t *rets, ...)
253 {
254 int i;
255 struct prom_args args;
256 va_list list;
257
258 args.service = ADDR(service);
259 args.nargs = nargs;
260 args.nret = nret;
261
262 va_start(list, rets);
263 for (i = 0; i < nargs; i++)
264 args.args[i] = va_arg(list, prom_arg_t);
265 va_end(list);
266
267 for (i = 0; i < nret; i++)
268 args.args[nargs+i] = 0;
269
270 if (enter_prom(&args, RELOC(prom_entry)) < 0)
271 return PROM_ERROR;
272
273 if (rets != NULL)
274 for (i = 1; i < nret; ++i)
275 rets[i-1] = args.args[nargs+i];
276
277 return (nret > 0) ? args.args[nargs] : 0;
278 }
279
280
281 static void __init prom_print(const char *msg)
282 {
283 const char *p, *q;
284 struct prom_t *_prom = &RELOC(prom);
285
286 if (_prom->stdout == 0)
287 return;
288
289 for (p = msg; *p != 0; p = q) {
290 for (q = p; *q != 0 && *q != '\n'; ++q)
291 ;
292 if (q > p)
293 call_prom("write", 3, 1, _prom->stdout, p, q - p);
294 if (*q == 0)
295 break;
296 ++q;
297 call_prom("write", 3, 1, _prom->stdout, ADDR("\r\n"), 2);
298 }
299 }
300
301
302 static void __init prom_print_hex(unsigned long val)
303 {
304 int i, nibbles = sizeof(val)*2;
305 char buf[sizeof(val)*2+1];
306 struct prom_t *_prom = &RELOC(prom);
307
308 for (i = nibbles-1; i >= 0; i--) {
309 buf[i] = (val & 0xf) + '0';
310 if (buf[i] > '9')
311 buf[i] += ('a'-'0'-10);
312 val >>= 4;
313 }
314 buf[nibbles] = '\0';
315 call_prom("write", 3, 1, _prom->stdout, buf, nibbles);
316 }
317
318 /* max number of decimal digits in an unsigned long */
319 #define UL_DIGITS 21
320 static void __init prom_print_dec(unsigned long val)
321 {
322 int i, size;
323 char buf[UL_DIGITS+1];
324 struct prom_t *_prom = &RELOC(prom);
325
326 for (i = UL_DIGITS-1; i >= 0; i--) {
327 buf[i] = (val % 10) + '0';
328 val = val/10;
329 if (val == 0)
330 break;
331 }
332 /* shift stuff down */
333 size = UL_DIGITS - i;
334 call_prom("write", 3, 1, _prom->stdout, buf+i, size);
335 }
336
337 static void __init prom_printf(const char *format, ...)
338 {
339 const char *p, *q, *s;
340 va_list args;
341 unsigned long v;
342 long vs;
343 struct prom_t *_prom = &RELOC(prom);
344
345 va_start(args, format);
346 #ifdef CONFIG_PPC64
347 format = PTRRELOC(format);
348 #endif
349 for (p = format; *p != 0; p = q) {
350 for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q)
351 ;
352 if (q > p)
353 call_prom("write", 3, 1, _prom->stdout, p, q - p);
354 if (*q == 0)
355 break;
356 if (*q == '\n') {
357 ++q;
358 call_prom("write", 3, 1, _prom->stdout,
359 ADDR("\r\n"), 2);
360 continue;
361 }
362 ++q;
363 if (*q == 0)
364 break;
365 switch (*q) {
366 case 's':
367 ++q;
368 s = va_arg(args, const char *);
369 prom_print(s);
370 break;
371 case 'x':
372 ++q;
373 v = va_arg(args, unsigned long);
374 prom_print_hex(v);
375 break;
376 case 'd':
377 ++q;
378 vs = va_arg(args, int);
379 if (vs < 0) {
380 prom_print(RELOC("-"));
381 vs = -vs;
382 }
383 prom_print_dec(vs);
384 break;
385 case 'l':
386 ++q;
387 if (*q == 0)
388 break;
389 else if (*q == 'x') {
390 ++q;
391 v = va_arg(args, unsigned long);
392 prom_print_hex(v);
393 } else if (*q == 'u') { /* '%lu' */
394 ++q;
395 v = va_arg(args, unsigned long);
396 prom_print_dec(v);
397 } else if (*q == 'd') { /* %ld */
398 ++q;
399 vs = va_arg(args, long);
400 if (vs < 0) {
401 prom_print(RELOC("-"));
402 vs = -vs;
403 }
404 prom_print_dec(vs);
405 }
406 break;
407 }
408 }
409 }
410
411
412 static unsigned int __init prom_claim(unsigned long virt, unsigned long size,
413 unsigned long align)
414 {
415 struct prom_t *_prom = &RELOC(prom);
416
417 if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) {
418 /*
419 * Old OF requires we claim physical and virtual separately
420 * and then map explicitly (assuming virtual mode)
421 */
422 int ret;
423 prom_arg_t result;
424
425 ret = call_prom_ret("call-method", 5, 2, &result,
426 ADDR("claim"), _prom->memory,
427 align, size, virt);
428 if (ret != 0 || result == -1)
429 return -1;
430 ret = call_prom_ret("call-method", 5, 2, &result,
431 ADDR("claim"), _prom->mmumap,
432 align, size, virt);
433 if (ret != 0) {
434 call_prom("call-method", 4, 1, ADDR("release"),
435 _prom->memory, size, virt);
436 return -1;
437 }
438 /* the 0x12 is M (coherence) + PP == read/write */
439 call_prom("call-method", 6, 1,
440 ADDR("map"), _prom->mmumap, 0x12, size, virt, virt);
441 return virt;
442 }
443 return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size,
444 (prom_arg_t)align);
445 }
446
447 static void __init __attribute__((noreturn)) prom_panic(const char *reason)
448 {
449 #ifdef CONFIG_PPC64
450 reason = PTRRELOC(reason);
451 #endif
452 prom_print(reason);
453 /* Do not call exit because it clears the screen on pmac
454 * it also causes some sort of double-fault on early pmacs */
455 if (RELOC(of_platform) == PLATFORM_POWERMAC)
456 asm("trap\n");
457
458 /* ToDo: should put up an SRC here on p/iSeries */
459 call_prom("exit", 0, 0);
460
461 for (;;) /* should never get here */
462 ;
463 }
464
465
466 static int __init prom_next_node(phandle *nodep)
467 {
468 phandle node;
469
470 if ((node = *nodep) != 0
471 && (*nodep = call_prom("child", 1, 1, node)) != 0)
472 return 1;
473 if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
474 return 1;
475 for (;;) {
476 if ((node = call_prom("parent", 1, 1, node)) == 0)
477 return 0;
478 if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
479 return 1;
480 }
481 }
482
483 static int inline prom_getprop(phandle node, const char *pname,
484 void *value, size_t valuelen)
485 {
486 return call_prom("getprop", 4, 1, node, ADDR(pname),
487 (u32)(unsigned long) value, (u32) valuelen);
488 }
489
490 static int inline prom_getproplen(phandle node, const char *pname)
491 {
492 return call_prom("getproplen", 2, 1, node, ADDR(pname));
493 }
494
495 static void add_string(char **str, const char *q)
496 {
497 char *p = *str;
498
499 while (*q)
500 *p++ = *q++;
501 *p++ = ' ';
502 *str = p;
503 }
504
505 static char *tohex(unsigned int x)
506 {
507 static char digits[] = "0123456789abcdef";
508 static char result[9];
509 int i;
510
511 result[8] = 0;
512 i = 8;
513 do {
514 --i;
515 result[i] = digits[x & 0xf];
516 x >>= 4;
517 } while (x != 0 && i > 0);
518 return &result[i];
519 }
520
521 static int __init prom_setprop(phandle node, const char *nodename,
522 const char *pname, void *value, size_t valuelen)
523 {
524 char cmd[256], *p;
525
526 if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL))
527 return call_prom("setprop", 4, 1, node, ADDR(pname),
528 (u32)(unsigned long) value, (u32) valuelen);
529
530 /* gah... setprop doesn't work on longtrail, have to use interpret */
531 p = cmd;
532 add_string(&p, "dev");
533 add_string(&p, nodename);
534 add_string(&p, tohex((u32)(unsigned long) value));
535 add_string(&p, tohex(valuelen));
536 add_string(&p, tohex(ADDR(pname)));
537 add_string(&p, tohex(strlen(RELOC(pname))));
538 add_string(&p, "property");
539 *p = 0;
540 return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd);
541 }
542
543 /* We can't use the standard versions because of RELOC headaches. */
544 #define isxdigit(c) (('0' <= (c) && (c) <= '9') \
545 || ('a' <= (c) && (c) <= 'f') \
546 || ('A' <= (c) && (c) <= 'F'))
547
548 #define isdigit(c) ('0' <= (c) && (c) <= '9')
549 #define islower(c) ('a' <= (c) && (c) <= 'z')
550 #define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c))
551
552 unsigned long prom_strtoul(const char *cp, const char **endp)
553 {
554 unsigned long result = 0, base = 10, value;
555
556 if (*cp == '0') {
557 base = 8;
558 cp++;
559 if (toupper(*cp) == 'X') {
560 cp++;
561 base = 16;
562 }
563 }
564
565 while (isxdigit(*cp) &&
566 (value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) {
567 result = result * base + value;
568 cp++;
569 }
570
571 if (endp)
572 *endp = cp;
573
574 return result;
575 }
576
577 unsigned long prom_memparse(const char *ptr, const char **retptr)
578 {
579 unsigned long ret = prom_strtoul(ptr, retptr);
580 int shift = 0;
581
582 /*
583 * We can't use a switch here because GCC *may* generate a
584 * jump table which won't work, because we're not running at
585 * the address we're linked at.
586 */
587 if ('G' == **retptr || 'g' == **retptr)
588 shift = 30;
589
590 if ('M' == **retptr || 'm' == **retptr)
591 shift = 20;
592
593 if ('K' == **retptr || 'k' == **retptr)
594 shift = 10;
595
596 if (shift) {
597 ret <<= shift;
598 (*retptr)++;
599 }
600
601 return ret;
602 }
603
604 /*
605 * Early parsing of the command line passed to the kernel, used for
606 * "mem=x" and the options that affect the iommu
607 */
608 static void __init early_cmdline_parse(void)
609 {
610 struct prom_t *_prom = &RELOC(prom);
611 const char *opt;
612
613 char *p;
614 int l = 0;
615
616 RELOC(prom_cmd_line[0]) = 0;
617 p = RELOC(prom_cmd_line);
618 if ((long)_prom->chosen > 0)
619 l = prom_getprop(_prom->chosen, "bootargs", p, COMMAND_LINE_SIZE-1);
620 #ifdef CONFIG_CMDLINE
621 if (l <= 0 || p[0] == '\0') /* dbl check */
622 strlcpy(RELOC(prom_cmd_line),
623 RELOC(CONFIG_CMDLINE), sizeof(prom_cmd_line));
624 #endif /* CONFIG_CMDLINE */
625 prom_printf("command line: %s\n", RELOC(prom_cmd_line));
626
627 #ifdef CONFIG_PPC64
628 opt = strstr(RELOC(prom_cmd_line), RELOC("iommu="));
629 if (opt) {
630 prom_printf("iommu opt is: %s\n", opt);
631 opt += 6;
632 while (*opt && *opt == ' ')
633 opt++;
634 if (!strncmp(opt, RELOC("off"), 3))
635 RELOC(prom_iommu_off) = 1;
636 else if (!strncmp(opt, RELOC("force"), 5))
637 RELOC(prom_iommu_force_on) = 1;
638 }
639 #endif
640 opt = strstr(RELOC(prom_cmd_line), RELOC("mem="));
641 if (opt) {
642 opt += 4;
643 RELOC(prom_memory_limit) = prom_memparse(opt, (const char **)&opt);
644 #ifdef CONFIG_PPC64
645 /* Align to 16 MB == size of ppc64 large page */
646 RELOC(prom_memory_limit) = ALIGN(RELOC(prom_memory_limit), 0x1000000);
647 #endif
648 }
649 }
650
651 #if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
652 /*
653 * There are two methods for telling firmware what our capabilities are.
654 * Newer machines have an "ibm,client-architecture-support" method on the
655 * root node. For older machines, we have to call the "process-elf-header"
656 * method in the /packages/elf-loader node, passing it a fake 32-bit
657 * ELF header containing a couple of PT_NOTE sections that contain
658 * structures that contain various information.
659 */
660
661 /*
662 * New method - extensible architecture description vector.
663 *
664 * Because the description vector contains a mix of byte and word
665 * values, we declare it as an unsigned char array, and use this
666 * macro to put word values in.
667 */
668 #define W(x) ((x) >> 24) & 0xff, ((x) >> 16) & 0xff, \
669 ((x) >> 8) & 0xff, (x) & 0xff
670
671 /* Option vector bits - generic bits in byte 1 */
672 #define OV_IGNORE 0x80 /* ignore this vector */
673 #define OV_CESSATION_POLICY 0x40 /* halt if unsupported option present*/
674
675 /* Option vector 1: processor architectures supported */
676 #define OV1_PPC_2_00 0x80 /* set if we support PowerPC 2.00 */
677 #define OV1_PPC_2_01 0x40 /* set if we support PowerPC 2.01 */
678 #define OV1_PPC_2_02 0x20 /* set if we support PowerPC 2.02 */
679 #define OV1_PPC_2_03 0x10 /* set if we support PowerPC 2.03 */
680 #define OV1_PPC_2_04 0x08 /* set if we support PowerPC 2.04 */
681 #define OV1_PPC_2_05 0x04 /* set if we support PowerPC 2.05 */
682 #define OV1_PPC_2_06 0x02 /* set if we support PowerPC 2.06 */
683
684 /* Option vector 2: Open Firmware options supported */
685 #define OV2_REAL_MODE 0x20 /* set if we want OF in real mode */
686
687 /* Option vector 3: processor options supported */
688 #define OV3_FP 0x80 /* floating point */
689 #define OV3_VMX 0x40 /* VMX/Altivec */
690 #define OV3_DFP 0x20 /* decimal FP */
691
692 /* Option vector 5: PAPR/OF options supported */
693 #define OV5_LPAR 0x80 /* logical partitioning supported */
694 #define OV5_SPLPAR 0x40 /* shared-processor LPAR supported */
695 /* ibm,dynamic-reconfiguration-memory property supported */
696 #define OV5_DRCONF_MEMORY 0x20
697 #define OV5_LARGE_PAGES 0x10 /* large pages supported */
698 #define OV5_DONATE_DEDICATE_CPU 0x02 /* donate dedicated CPU support */
699 /* PCIe/MSI support. Without MSI full PCIe is not supported */
700 #ifdef CONFIG_PCI_MSI
701 #define OV5_MSI 0x01 /* PCIe/MSI support */
702 #else
703 #define OV5_MSI 0x00
704 #endif /* CONFIG_PCI_MSI */
705 #ifdef CONFIG_PPC_SMLPAR
706 #define OV5_CMO 0x80 /* Cooperative Memory Overcommitment */
707 #define OV5_XCMO 0x40 /* Page Coalescing */
708 #else
709 #define OV5_CMO 0x00
710 #define OV5_XCMO 0x00
711 #endif
712 #define OV5_TYPE1_AFFINITY 0x80 /* Type 1 NUMA affinity */
713
714 /* Option Vector 6: IBM PAPR hints */
715 #define OV6_LINUX 0x02 /* Linux is our OS */
716
717 /*
718 * The architecture vector has an array of PVR mask/value pairs,
719 * followed by # option vectors - 1, followed by the option vectors.
720 */
721 static unsigned char ibm_architecture_vec[] = {
722 W(0xfffe0000), W(0x003a0000), /* POWER5/POWER5+ */
723 W(0xffff0000), W(0x003e0000), /* POWER6 */
724 W(0xffff0000), W(0x003f0000), /* POWER7 */
725 W(0xffffffff), W(0x0f000003), /* all 2.06-compliant */
726 W(0xffffffff), W(0x0f000002), /* all 2.05-compliant */
727 W(0xfffffffe), W(0x0f000001), /* all 2.04-compliant and earlier */
728 6 - 1, /* 6 option vectors */
729
730 /* option vector 1: processor architectures supported */
731 3 - 2, /* length */
732 0, /* don't ignore, don't halt */
733 OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 |
734 OV1_PPC_2_04 | OV1_PPC_2_05 | OV1_PPC_2_06,
735
736 /* option vector 2: Open Firmware options supported */
737 34 - 2, /* length */
738 OV2_REAL_MODE,
739 0, 0,
740 W(0xffffffff), /* real_base */
741 W(0xffffffff), /* real_size */
742 W(0xffffffff), /* virt_base */
743 W(0xffffffff), /* virt_size */
744 W(0xffffffff), /* load_base */
745 W(64), /* 64MB min RMA */
746 W(0xffffffff), /* full client load */
747 0, /* min RMA percentage of total RAM */
748 48, /* max log_2(hash table size) */
749
750 /* option vector 3: processor options supported */
751 3 - 2, /* length */
752 0, /* don't ignore, don't halt */
753 OV3_FP | OV3_VMX | OV3_DFP,
754
755 /* option vector 4: IBM PAPR implementation */
756 2 - 2, /* length */
757 0, /* don't halt */
758
759 /* option vector 5: PAPR/OF options */
760 13 - 2, /* length */
761 0, /* don't ignore, don't halt */
762 OV5_LPAR | OV5_SPLPAR | OV5_LARGE_PAGES | OV5_DRCONF_MEMORY |
763 OV5_DONATE_DEDICATE_CPU | OV5_MSI,
764 0,
765 OV5_CMO | OV5_XCMO,
766 OV5_TYPE1_AFFINITY,
767 0,
768 0,
769 0,
770 /* WARNING: The offset of the "number of cores" field below
771 * must match by the macro below. Update the definition if
772 * the structure layout changes.
773 */
774 #define IBM_ARCH_VEC_NRCORES_OFFSET 100
775 W(NR_CPUS), /* number of cores supported */
776
777 /* option vector 6: IBM PAPR hints */
778 4 - 2, /* length */
779 0,
780 0,
781 OV6_LINUX,
782
783 };
784
785 /* Old method - ELF header with PT_NOTE sections */
786 static struct fake_elf {
787 Elf32_Ehdr elfhdr;
788 Elf32_Phdr phdr[2];
789 struct chrpnote {
790 u32 namesz;
791 u32 descsz;
792 u32 type;
793 char name[8]; /* "PowerPC" */
794 struct chrpdesc {
795 u32 real_mode;
796 u32 real_base;
797 u32 real_size;
798 u32 virt_base;
799 u32 virt_size;
800 u32 load_base;
801 } chrpdesc;
802 } chrpnote;
803 struct rpanote {
804 u32 namesz;
805 u32 descsz;
806 u32 type;
807 char name[24]; /* "IBM,RPA-Client-Config" */
808 struct rpadesc {
809 u32 lpar_affinity;
810 u32 min_rmo_size;
811 u32 min_rmo_percent;
812 u32 max_pft_size;
813 u32 splpar;
814 u32 min_load;
815 u32 new_mem_def;
816 u32 ignore_me;
817 } rpadesc;
818 } rpanote;
819 } fake_elf = {
820 .elfhdr = {
821 .e_ident = { 0x7f, 'E', 'L', 'F',
822 ELFCLASS32, ELFDATA2MSB, EV_CURRENT },
823 .e_type = ET_EXEC, /* yeah right */
824 .e_machine = EM_PPC,
825 .e_version = EV_CURRENT,
826 .e_phoff = offsetof(struct fake_elf, phdr),
827 .e_phentsize = sizeof(Elf32_Phdr),
828 .e_phnum = 2
829 },
830 .phdr = {
831 [0] = {
832 .p_type = PT_NOTE,
833 .p_offset = offsetof(struct fake_elf, chrpnote),
834 .p_filesz = sizeof(struct chrpnote)
835 }, [1] = {
836 .p_type = PT_NOTE,
837 .p_offset = offsetof(struct fake_elf, rpanote),
838 .p_filesz = sizeof(struct rpanote)
839 }
840 },
841 .chrpnote = {
842 .namesz = sizeof("PowerPC"),
843 .descsz = sizeof(struct chrpdesc),
844 .type = 0x1275,
845 .name = "PowerPC",
846 .chrpdesc = {
847 .real_mode = ~0U, /* ~0 means "don't care" */
848 .real_base = ~0U,
849 .real_size = ~0U,
850 .virt_base = ~0U,
851 .virt_size = ~0U,
852 .load_base = ~0U
853 },
854 },
855 .rpanote = {
856 .namesz = sizeof("IBM,RPA-Client-Config"),
857 .descsz = sizeof(struct rpadesc),
858 .type = 0x12759999,
859 .name = "IBM,RPA-Client-Config",
860 .rpadesc = {
861 .lpar_affinity = 0,
862 .min_rmo_size = 64, /* in megabytes */
863 .min_rmo_percent = 0,
864 .max_pft_size = 48, /* 2^48 bytes max PFT size */
865 .splpar = 1,
866 .min_load = ~0U,
867 .new_mem_def = 0
868 }
869 }
870 };
871
872 static int __init prom_count_smt_threads(void)
873 {
874 phandle node;
875 char type[64];
876 unsigned int plen;
877
878 /* Pick up th first CPU node we can find */
879 for (node = 0; prom_next_node(&node); ) {
880 type[0] = 0;
881 prom_getprop(node, "device_type", type, sizeof(type));
882
883 if (strcmp(type, RELOC("cpu")))
884 continue;
885 /*
886 * There is an entry for each smt thread, each entry being
887 * 4 bytes long. All cpus should have the same number of
888 * smt threads, so return after finding the first.
889 */
890 plen = prom_getproplen(node, "ibm,ppc-interrupt-server#s");
891 if (plen == PROM_ERROR)
892 break;
893 plen >>= 2;
894 prom_debug("Found %lu smt threads per core\n", (unsigned long)plen);
895
896 /* Sanity check */
897 if (plen < 1 || plen > 64) {
898 prom_printf("Threads per core %lu out of bounds, assuming 1\n",
899 (unsigned long)plen);
900 return 1;
901 }
902 return plen;
903 }
904 prom_debug("No threads found, assuming 1 per core\n");
905
906 return 1;
907
908 }
909
910
911 static void __init prom_send_capabilities(void)
912 {
913 ihandle elfloader, root;
914 prom_arg_t ret;
915 u32 *cores;
916
917 root = call_prom("open", 1, 1, ADDR("/"));
918 if (root != 0) {
919 /* We need to tell the FW about the number of cores we support.
920 *
921 * To do that, we count the number of threads on the first core
922 * (we assume this is the same for all cores) and use it to
923 * divide NR_CPUS.
924 */
925 cores = (u32 *)PTRRELOC(&ibm_architecture_vec[IBM_ARCH_VEC_NRCORES_OFFSET]);
926 if (*cores != NR_CPUS) {
927 prom_printf("WARNING ! "
928 "ibm_architecture_vec structure inconsistent: %lu!\n",
929 *cores);
930 } else {
931 *cores = DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads());
932 prom_printf("Max number of cores passed to firmware: %lu (NR_CPUS = %lu)\n",
933 *cores, NR_CPUS);
934 }
935
936 /* try calling the ibm,client-architecture-support method */
937 prom_printf("Calling ibm,client-architecture-support...");
938 if (call_prom_ret("call-method", 3, 2, &ret,
939 ADDR("ibm,client-architecture-support"),
940 root,
941 ADDR(ibm_architecture_vec)) == 0) {
942 /* the call exists... */
943 if (ret)
944 prom_printf("\nWARNING: ibm,client-architecture"
945 "-support call FAILED!\n");
946 call_prom("close", 1, 0, root);
947 prom_printf(" done\n");
948 return;
949 }
950 call_prom("close", 1, 0, root);
951 prom_printf(" not implemented\n");
952 }
953
954 /* no ibm,client-architecture-support call, try the old way */
955 elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader"));
956 if (elfloader == 0) {
957 prom_printf("couldn't open /packages/elf-loader\n");
958 return;
959 }
960 call_prom("call-method", 3, 1, ADDR("process-elf-header"),
961 elfloader, ADDR(&fake_elf));
962 call_prom("close", 1, 0, elfloader);
963 }
964 #endif
965
966 /*
967 * Memory allocation strategy... our layout is normally:
968 *
969 * at 14Mb or more we have vmlinux, then a gap and initrd. In some
970 * rare cases, initrd might end up being before the kernel though.
971 * We assume this won't override the final kernel at 0, we have no
972 * provision to handle that in this version, but it should hopefully
973 * never happen.
974 *
975 * alloc_top is set to the top of RMO, eventually shrink down if the
976 * TCEs overlap
977 *
978 * alloc_bottom is set to the top of kernel/initrd
979 *
980 * from there, allocations are done this way : rtas is allocated
981 * topmost, and the device-tree is allocated from the bottom. We try
982 * to grow the device-tree allocation as we progress. If we can't,
983 * then we fail, we don't currently have a facility to restart
984 * elsewhere, but that shouldn't be necessary.
985 *
986 * Note that calls to reserve_mem have to be done explicitly, memory
987 * allocated with either alloc_up or alloc_down isn't automatically
988 * reserved.
989 */
990
991
992 /*
993 * Allocates memory in the RMO upward from the kernel/initrd
994 *
995 * When align is 0, this is a special case, it means to allocate in place
996 * at the current location of alloc_bottom or fail (that is basically
997 * extending the previous allocation). Used for the device-tree flattening
998 */
999 static unsigned long __init alloc_up(unsigned long size, unsigned long align)
1000 {
1001 unsigned long base = RELOC(alloc_bottom);
1002 unsigned long addr = 0;
1003
1004 if (align)
1005 base = _ALIGN_UP(base, align);
1006 prom_debug("alloc_up(%x, %x)\n", size, align);
1007 if (RELOC(ram_top) == 0)
1008 prom_panic("alloc_up() called with mem not initialized\n");
1009
1010 if (align)
1011 base = _ALIGN_UP(RELOC(alloc_bottom), align);
1012 else
1013 base = RELOC(alloc_bottom);
1014
1015 for(; (base + size) <= RELOC(alloc_top);
1016 base = _ALIGN_UP(base + 0x100000, align)) {
1017 prom_debug(" trying: 0x%x\n\r", base);
1018 addr = (unsigned long)prom_claim(base, size, 0);
1019 if (addr != PROM_ERROR && addr != 0)
1020 break;
1021 addr = 0;
1022 if (align == 0)
1023 break;
1024 }
1025 if (addr == 0)
1026 return 0;
1027 RELOC(alloc_bottom) = addr + size;
1028
1029 prom_debug(" -> %x\n", addr);
1030 prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom));
1031 prom_debug(" alloc_top : %x\n", RELOC(alloc_top));
1032 prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high));
1033 prom_debug(" rmo_top : %x\n", RELOC(rmo_top));
1034 prom_debug(" ram_top : %x\n", RELOC(ram_top));
1035
1036 return addr;
1037 }
1038
1039 /*
1040 * Allocates memory downward, either from top of RMO, or if highmem
1041 * is set, from the top of RAM. Note that this one doesn't handle
1042 * failures. It does claim memory if highmem is not set.
1043 */
1044 static unsigned long __init alloc_down(unsigned long size, unsigned long align,
1045 int highmem)
1046 {
1047 unsigned long base, addr = 0;
1048
1049 prom_debug("alloc_down(%x, %x, %s)\n", size, align,
1050 highmem ? RELOC("(high)") : RELOC("(low)"));
1051 if (RELOC(ram_top) == 0)
1052 prom_panic("alloc_down() called with mem not initialized\n");
1053
1054 if (highmem) {
1055 /* Carve out storage for the TCE table. */
1056 addr = _ALIGN_DOWN(RELOC(alloc_top_high) - size, align);
1057 if (addr <= RELOC(alloc_bottom))
1058 return 0;
1059 /* Will we bump into the RMO ? If yes, check out that we
1060 * didn't overlap existing allocations there, if we did,
1061 * we are dead, we must be the first in town !
1062 */
1063 if (addr < RELOC(rmo_top)) {
1064 /* Good, we are first */
1065 if (RELOC(alloc_top) == RELOC(rmo_top))
1066 RELOC(alloc_top) = RELOC(rmo_top) = addr;
1067 else
1068 return 0;
1069 }
1070 RELOC(alloc_top_high) = addr;
1071 goto bail;
1072 }
1073
1074 base = _ALIGN_DOWN(RELOC(alloc_top) - size, align);
1075 for (; base > RELOC(alloc_bottom);
1076 base = _ALIGN_DOWN(base - 0x100000, align)) {
1077 prom_debug(" trying: 0x%x\n\r", base);
1078 addr = (unsigned long)prom_claim(base, size, 0);
1079 if (addr != PROM_ERROR && addr != 0)
1080 break;
1081 addr = 0;
1082 }
1083 if (addr == 0)
1084 return 0;
1085 RELOC(alloc_top) = addr;
1086
1087 bail:
1088 prom_debug(" -> %x\n", addr);
1089 prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom));
1090 prom_debug(" alloc_top : %x\n", RELOC(alloc_top));
1091 prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high));
1092 prom_debug(" rmo_top : %x\n", RELOC(rmo_top));
1093 prom_debug(" ram_top : %x\n", RELOC(ram_top));
1094
1095 return addr;
1096 }
1097
1098 /*
1099 * Parse a "reg" cell
1100 */
1101 static unsigned long __init prom_next_cell(int s, cell_t **cellp)
1102 {
1103 cell_t *p = *cellp;
1104 unsigned long r = 0;
1105
1106 /* Ignore more than 2 cells */
1107 while (s > sizeof(unsigned long) / 4) {
1108 p++;
1109 s--;
1110 }
1111 r = *p++;
1112 #ifdef CONFIG_PPC64
1113 if (s > 1) {
1114 r <<= 32;
1115 r |= *(p++);
1116 }
1117 #endif
1118 *cellp = p;
1119 return r;
1120 }
1121
1122 /*
1123 * Very dumb function for adding to the memory reserve list, but
1124 * we don't need anything smarter at this point
1125 *
1126 * XXX Eventually check for collisions. They should NEVER happen.
1127 * If problems seem to show up, it would be a good start to track
1128 * them down.
1129 */
1130 static void __init reserve_mem(u64 base, u64 size)
1131 {
1132 u64 top = base + size;
1133 unsigned long cnt = RELOC(mem_reserve_cnt);
1134
1135 if (size == 0)
1136 return;
1137
1138 /* We need to always keep one empty entry so that we
1139 * have our terminator with "size" set to 0 since we are
1140 * dumb and just copy this entire array to the boot params
1141 */
1142 base = _ALIGN_DOWN(base, PAGE_SIZE);
1143 top = _ALIGN_UP(top, PAGE_SIZE);
1144 size = top - base;
1145
1146 if (cnt >= (MEM_RESERVE_MAP_SIZE - 1))
1147 prom_panic("Memory reserve map exhausted !\n");
1148 RELOC(mem_reserve_map)[cnt].base = base;
1149 RELOC(mem_reserve_map)[cnt].size = size;
1150 RELOC(mem_reserve_cnt) = cnt + 1;
1151 }
1152
1153 /*
1154 * Initialize memory allocation mechanism, parse "memory" nodes and
1155 * obtain that way the top of memory and RMO to setup out local allocator
1156 */
1157 static void __init prom_init_mem(void)
1158 {
1159 phandle node;
1160 char *path, type[64];
1161 unsigned int plen;
1162 cell_t *p, *endp;
1163 struct prom_t *_prom = &RELOC(prom);
1164 u32 rac, rsc;
1165
1166 /*
1167 * We iterate the memory nodes to find
1168 * 1) top of RMO (first node)
1169 * 2) top of memory
1170 */
1171 rac = 2;
1172 prom_getprop(_prom->root, "#address-cells", &rac, sizeof(rac));
1173 rsc = 1;
1174 prom_getprop(_prom->root, "#size-cells", &rsc, sizeof(rsc));
1175 prom_debug("root_addr_cells: %x\n", (unsigned long) rac);
1176 prom_debug("root_size_cells: %x\n", (unsigned long) rsc);
1177
1178 prom_debug("scanning memory:\n");
1179 path = RELOC(prom_scratch);
1180
1181 for (node = 0; prom_next_node(&node); ) {
1182 type[0] = 0;
1183 prom_getprop(node, "device_type", type, sizeof(type));
1184
1185 if (type[0] == 0) {
1186 /*
1187 * CHRP Longtrail machines have no device_type
1188 * on the memory node, so check the name instead...
1189 */
1190 prom_getprop(node, "name", type, sizeof(type));
1191 }
1192 if (strcmp(type, RELOC("memory")))
1193 continue;
1194
1195 plen = prom_getprop(node, "reg", RELOC(regbuf), sizeof(regbuf));
1196 if (plen > sizeof(regbuf)) {
1197 prom_printf("memory node too large for buffer !\n");
1198 plen = sizeof(regbuf);
1199 }
1200 p = RELOC(regbuf);
1201 endp = p + (plen / sizeof(cell_t));
1202
1203 #ifdef DEBUG_PROM
1204 memset(path, 0, PROM_SCRATCH_SIZE);
1205 call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1);
1206 prom_debug(" node %s :\n", path);
1207 #endif /* DEBUG_PROM */
1208
1209 while ((endp - p) >= (rac + rsc)) {
1210 unsigned long base, size;
1211
1212 base = prom_next_cell(rac, &p);
1213 size = prom_next_cell(rsc, &p);
1214
1215 if (size == 0)
1216 continue;
1217 prom_debug(" %x %x\n", base, size);
1218 if (base == 0 && (RELOC(of_platform) & PLATFORM_LPAR))
1219 RELOC(rmo_top) = size;
1220 if ((base + size) > RELOC(ram_top))
1221 RELOC(ram_top) = base + size;
1222 }
1223 }
1224
1225 RELOC(alloc_bottom) = PAGE_ALIGN((unsigned long)&RELOC(_end) + 0x4000);
1226
1227 /* Check if we have an initrd after the kernel, if we do move our bottom
1228 * point to after it
1229 */
1230 if (RELOC(prom_initrd_start)) {
1231 if (RELOC(prom_initrd_end) > RELOC(alloc_bottom))
1232 RELOC(alloc_bottom) = PAGE_ALIGN(RELOC(prom_initrd_end));
1233 }
1234
1235 /*
1236 * If prom_memory_limit is set we reduce the upper limits *except* for
1237 * alloc_top_high. This must be the real top of RAM so we can put
1238 * TCE's up there.
1239 */
1240
1241 RELOC(alloc_top_high) = RELOC(ram_top);
1242
1243 if (RELOC(prom_memory_limit)) {
1244 if (RELOC(prom_memory_limit) <= RELOC(alloc_bottom)) {
1245 prom_printf("Ignoring mem=%x <= alloc_bottom.\n",
1246 RELOC(prom_memory_limit));
1247 RELOC(prom_memory_limit) = 0;
1248 } else if (RELOC(prom_memory_limit) >= RELOC(ram_top)) {
1249 prom_printf("Ignoring mem=%x >= ram_top.\n",
1250 RELOC(prom_memory_limit));
1251 RELOC(prom_memory_limit) = 0;
1252 } else {
1253 RELOC(ram_top) = RELOC(prom_memory_limit);
1254 RELOC(rmo_top) = min(RELOC(rmo_top), RELOC(prom_memory_limit));
1255 }
1256 }
1257
1258 /*
1259 * Setup our top alloc point, that is top of RMO or top of
1260 * segment 0 when running non-LPAR.
1261 * Some RS64 machines have buggy firmware where claims up at
1262 * 1GB fail. Cap at 768MB as a workaround.
1263 * Since 768MB is plenty of room, and we need to cap to something
1264 * reasonable on 32-bit, cap at 768MB on all machines.
1265 */
1266 if (!RELOC(rmo_top))
1267 RELOC(rmo_top) = RELOC(ram_top);
1268 RELOC(rmo_top) = min(0x30000000ul, RELOC(rmo_top));
1269 RELOC(alloc_top) = RELOC(rmo_top);
1270 RELOC(alloc_top_high) = RELOC(ram_top);
1271
1272 prom_printf("memory layout at init:\n");
1273 prom_printf(" memory_limit : %x (16 MB aligned)\n", RELOC(prom_memory_limit));
1274 prom_printf(" alloc_bottom : %x\n", RELOC(alloc_bottom));
1275 prom_printf(" alloc_top : %x\n", RELOC(alloc_top));
1276 prom_printf(" alloc_top_hi : %x\n", RELOC(alloc_top_high));
1277 prom_printf(" rmo_top : %x\n", RELOC(rmo_top));
1278 prom_printf(" ram_top : %x\n", RELOC(ram_top));
1279 }
1280
1281 static void __init prom_close_stdin(void)
1282 {
1283 struct prom_t *_prom = &RELOC(prom);
1284 ihandle val;
1285
1286 if (prom_getprop(_prom->chosen, "stdin", &val, sizeof(val)) > 0)
1287 call_prom("close", 1, 0, val);
1288 }
1289
1290 #ifdef CONFIG_PPC_POWERNV
1291
1292 static u64 __initdata prom_opal_size;
1293 static u64 __initdata prom_opal_align;
1294 static int __initdata prom_rtas_start_cpu;
1295 static u64 __initdata prom_rtas_data;
1296 static u64 __initdata prom_rtas_entry;
1297
1298 #ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
1299 static u64 __initdata prom_opal_base;
1300 static u64 __initdata prom_opal_entry;
1301 #endif
1302
1303 /* XXX Don't change this structure without updating opal-takeover.S */
1304 static struct opal_secondary_data {
1305 s64 ack; /* 0 */
1306 u64 go; /* 8 */
1307 struct opal_takeover_args args; /* 16 */
1308 } opal_secondary_data;
1309
1310 extern char opal_secondary_entry;
1311
1312 static void prom_query_opal(void)
1313 {
1314 long rc;
1315
1316 /* We must not query for OPAL presence on a machine that
1317 * supports TNK takeover (970 blades), as this uses the same
1318 * h-call with different arguments and will crash
1319 */
1320 if (PHANDLE_VALID(call_prom("finddevice", 1, 1,
1321 ADDR("/tnk-memory-map")))) {
1322 prom_printf("TNK takeover detected, skipping OPAL check\n");
1323 return;
1324 }
1325
1326 prom_printf("Querying for OPAL presence... ");
1327 rc = opal_query_takeover(&RELOC(prom_opal_size),
1328 &RELOC(prom_opal_align));
1329 prom_debug("(rc = %ld) ", rc);
1330 if (rc != 0) {
1331 prom_printf("not there.\n");
1332 return;
1333 }
1334 RELOC(of_platform) = PLATFORM_OPAL;
1335 prom_printf(" there !\n");
1336 prom_debug(" opal_size = 0x%lx\n", RELOC(prom_opal_size));
1337 prom_debug(" opal_align = 0x%lx\n", RELOC(prom_opal_align));
1338 if (RELOC(prom_opal_align) < 0x10000)
1339 RELOC(prom_opal_align) = 0x10000;
1340 }
1341
1342 static int prom_rtas_call(int token, int nargs, int nret, int *outputs, ...)
1343 {
1344 struct rtas_args rtas_args;
1345 va_list list;
1346 int i;
1347
1348 rtas_args.token = token;
1349 rtas_args.nargs = nargs;
1350 rtas_args.nret = nret;
1351 rtas_args.rets = (rtas_arg_t *)&(rtas_args.args[nargs]);
1352 va_start(list, outputs);
1353 for (i = 0; i < nargs; ++i)
1354 rtas_args.args[i] = va_arg(list, rtas_arg_t);
1355 va_end(list);
1356
1357 for (i = 0; i < nret; ++i)
1358 rtas_args.rets[i] = 0;
1359
1360 opal_enter_rtas(&rtas_args, RELOC(prom_rtas_data),
1361 RELOC(prom_rtas_entry));
1362
1363 if (nret > 1 && outputs != NULL)
1364 for (i = 0; i < nret-1; ++i)
1365 outputs[i] = rtas_args.rets[i+1];
1366 return (nret > 0)? rtas_args.rets[0]: 0;
1367 }
1368
1369 static void __init prom_opal_hold_cpus(void)
1370 {
1371 int i, cnt, cpu, rc;
1372 long j;
1373 phandle node;
1374 char type[64];
1375 u32 servers[8];
1376 struct prom_t *_prom = &RELOC(prom);
1377 void *entry = (unsigned long *)&RELOC(opal_secondary_entry);
1378 struct opal_secondary_data *data = &RELOC(opal_secondary_data);
1379
1380 prom_debug("prom_opal_hold_cpus: start...\n");
1381 prom_debug(" - entry = 0x%x\n", entry);
1382 prom_debug(" - data = 0x%x\n", data);
1383
1384 data->ack = -1;
1385 data->go = 0;
1386
1387 /* look for cpus */
1388 for (node = 0; prom_next_node(&node); ) {
1389 type[0] = 0;
1390 prom_getprop(node, "device_type", type, sizeof(type));
1391 if (strcmp(type, RELOC("cpu")) != 0)
1392 continue;
1393
1394 /* Skip non-configured cpus. */
1395 if (prom_getprop(node, "status", type, sizeof(type)) > 0)
1396 if (strcmp(type, RELOC("okay")) != 0)
1397 continue;
1398
1399 cnt = prom_getprop(node, "ibm,ppc-interrupt-server#s", servers,
1400 sizeof(servers));
1401 if (cnt == PROM_ERROR)
1402 break;
1403 cnt >>= 2;
1404 for (i = 0; i < cnt; i++) {
1405 cpu = servers[i];
1406 prom_debug("CPU %d ... ", cpu);
1407 if (cpu == _prom->cpu) {
1408 prom_debug("booted !\n");
1409 continue;
1410 }
1411 prom_debug("starting ... ");
1412
1413 /* Init the acknowledge var which will be reset by
1414 * the secondary cpu when it awakens from its OF
1415 * spinloop.
1416 */
1417 data->ack = -1;
1418 rc = prom_rtas_call(RELOC(prom_rtas_start_cpu), 3, 1,
1419 NULL, cpu, entry, data);
1420 prom_debug("rtas rc=%d ...", rc);
1421
1422 for (j = 0; j < 100000000 && data->ack == -1; j++) {
1423 HMT_low();
1424 mb();
1425 }
1426 HMT_medium();
1427 if (data->ack != -1)
1428 prom_debug("done, PIR=0x%x\n", data->ack);
1429 else
1430 prom_debug("timeout !\n");
1431 }
1432 }
1433 prom_debug("prom_opal_hold_cpus: end...\n");
1434 }
1435
1436 static void prom_opal_takeover(void)
1437 {
1438 struct opal_secondary_data *data = &RELOC(opal_secondary_data);
1439 struct opal_takeover_args *args = &data->args;
1440 u64 align = RELOC(prom_opal_align);
1441 u64 top_addr, opal_addr;
1442
1443 args->k_image = (u64)RELOC(_stext);
1444 args->k_size = _end - _stext;
1445 args->k_entry = 0;
1446 args->k_entry2 = 0x60;
1447
1448 top_addr = _ALIGN_UP(args->k_size, align);
1449
1450 if (RELOC(prom_initrd_start) != 0) {
1451 args->rd_image = RELOC(prom_initrd_start);
1452 args->rd_size = RELOC(prom_initrd_end) - args->rd_image;
1453 args->rd_loc = top_addr;
1454 top_addr = _ALIGN_UP(args->rd_loc + args->rd_size, align);
1455 }
1456
1457 /* Pickup an address for the HAL. We want to go really high
1458 * up to avoid problem with future kexecs. On the other hand
1459 * we don't want to be all over the TCEs on P5IOC2 machines
1460 * which are going to be up there too. We assume the machine
1461 * has plenty of memory, and we ask for the HAL for now to
1462 * be just below the 1G point, or above the initrd
1463 */
1464 opal_addr = _ALIGN_DOWN(0x40000000 - RELOC(prom_opal_size), align);
1465 if (opal_addr < top_addr)
1466 opal_addr = top_addr;
1467 args->hal_addr = opal_addr;
1468
1469 /* Copy the command line to the kernel image */
1470 strlcpy(RELOC(boot_command_line), RELOC(prom_cmd_line),
1471 COMMAND_LINE_SIZE);
1472
1473 prom_debug(" k_image = 0x%lx\n", args->k_image);
1474 prom_debug(" k_size = 0x%lx\n", args->k_size);
1475 prom_debug(" k_entry = 0x%lx\n", args->k_entry);
1476 prom_debug(" k_entry2 = 0x%lx\n", args->k_entry2);
1477 prom_debug(" hal_addr = 0x%lx\n", args->hal_addr);
1478 prom_debug(" rd_image = 0x%lx\n", args->rd_image);
1479 prom_debug(" rd_size = 0x%lx\n", args->rd_size);
1480 prom_debug(" rd_loc = 0x%lx\n", args->rd_loc);
1481 prom_printf("Performing OPAL takeover,this can take a few minutes..\n");
1482 prom_close_stdin();
1483 mb();
1484 data->go = 1;
1485 for (;;)
1486 opal_do_takeover(args);
1487 }
1488
1489 /*
1490 * Allocate room for and instantiate OPAL
1491 */
1492 static void __init prom_instantiate_opal(void)
1493 {
1494 phandle opal_node;
1495 ihandle opal_inst;
1496 u64 base, entry;
1497 u64 size = 0, align = 0x10000;
1498 u32 rets[2];
1499
1500 prom_debug("prom_instantiate_opal: start...\n");
1501
1502 opal_node = call_prom("finddevice", 1, 1, ADDR("/ibm,opal"));
1503 prom_debug("opal_node: %x\n", opal_node);
1504 if (!PHANDLE_VALID(opal_node))
1505 return;
1506
1507 prom_getprop(opal_node, "opal-runtime-size", &size, sizeof(size));
1508 if (size == 0)
1509 return;
1510 prom_getprop(opal_node, "opal-runtime-alignment", &align,
1511 sizeof(align));
1512
1513 base = alloc_down(size, align, 0);
1514 if (base == 0) {
1515 prom_printf("OPAL allocation failed !\n");
1516 return;
1517 }
1518
1519 opal_inst = call_prom("open", 1, 1, ADDR("/ibm,opal"));
1520 if (!IHANDLE_VALID(opal_inst)) {
1521 prom_printf("opening opal package failed (%x)\n", opal_inst);
1522 return;
1523 }
1524
1525 prom_printf("instantiating opal at 0x%x...", base);
1526
1527 if (call_prom_ret("call-method", 4, 3, rets,
1528 ADDR("load-opal-runtime"),
1529 opal_inst,
1530 base >> 32, base & 0xffffffff) != 0
1531 || (rets[0] == 0 && rets[1] == 0)) {
1532 prom_printf(" failed\n");
1533 return;
1534 }
1535 entry = (((u64)rets[0]) << 32) | rets[1];
1536
1537 prom_printf(" done\n");
1538
1539 reserve_mem(base, size);
1540
1541 prom_debug("opal base = 0x%x\n", base);
1542 prom_debug("opal align = 0x%x\n", align);
1543 prom_debug("opal entry = 0x%x\n", entry);
1544 prom_debug("opal size = 0x%x\n", (long)size);
1545
1546 prom_setprop(opal_node, "/ibm,opal", "opal-base-address",
1547 &base, sizeof(base));
1548 prom_setprop(opal_node, "/ibm,opal", "opal-entry-address",
1549 &entry, sizeof(entry));
1550
1551 #ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
1552 RELOC(prom_opal_base) = base;
1553 RELOC(prom_opal_entry) = entry;
1554 #endif
1555 prom_debug("prom_instantiate_opal: end...\n");
1556 }
1557
1558 #endif /* CONFIG_PPC_POWERNV */
1559
1560 /*
1561 * Allocate room for and instantiate RTAS
1562 */
1563 static void __init prom_instantiate_rtas(void)
1564 {
1565 phandle rtas_node;
1566 ihandle rtas_inst;
1567 u32 base, entry = 0;
1568 u32 size = 0;
1569
1570 prom_debug("prom_instantiate_rtas: start...\n");
1571
1572 rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
1573 prom_debug("rtas_node: %x\n", rtas_node);
1574 if (!PHANDLE_VALID(rtas_node))
1575 return;
1576
1577 prom_getprop(rtas_node, "rtas-size", &size, sizeof(size));
1578 if (size == 0)
1579 return;
1580
1581 base = alloc_down(size, PAGE_SIZE, 0);
1582 if (base == 0) {
1583 prom_printf("RTAS allocation failed !\n");
1584 return;
1585 }
1586
1587 rtas_inst = call_prom("open", 1, 1, ADDR("/rtas"));
1588 if (!IHANDLE_VALID(rtas_inst)) {
1589 prom_printf("opening rtas package failed (%x)\n", rtas_inst);
1590 return;
1591 }
1592
1593 prom_printf("instantiating rtas at 0x%x...", base);
1594
1595 if (call_prom_ret("call-method", 3, 2, &entry,
1596 ADDR("instantiate-rtas"),
1597 rtas_inst, base) != 0
1598 || entry == 0) {
1599 prom_printf(" failed\n");
1600 return;
1601 }
1602 prom_printf(" done\n");
1603
1604 reserve_mem(base, size);
1605
1606 prom_setprop(rtas_node, "/rtas", "linux,rtas-base",
1607 &base, sizeof(base));
1608 prom_setprop(rtas_node, "/rtas", "linux,rtas-entry",
1609 &entry, sizeof(entry));
1610
1611 #ifdef CONFIG_PPC_POWERNV
1612 /* PowerVN takeover hack */
1613 RELOC(prom_rtas_data) = base;
1614 RELOC(prom_rtas_entry) = entry;
1615 prom_getprop(rtas_node, "start-cpu", &RELOC(prom_rtas_start_cpu), 4);
1616 #endif
1617 prom_debug("rtas base = 0x%x\n", base);
1618 prom_debug("rtas entry = 0x%x\n", entry);
1619 prom_debug("rtas size = 0x%x\n", (long)size);
1620
1621 prom_debug("prom_instantiate_rtas: end...\n");
1622 }
1623
1624 #ifdef CONFIG_PPC64
1625 /*
1626 * Allocate room for and initialize TCE tables
1627 */
1628 static void __init prom_initialize_tce_table(void)
1629 {
1630 phandle node;
1631 ihandle phb_node;
1632 char compatible[64], type[64], model[64];
1633 char *path = RELOC(prom_scratch);
1634 u64 base, align;
1635 u32 minalign, minsize;
1636 u64 tce_entry, *tce_entryp;
1637 u64 local_alloc_top, local_alloc_bottom;
1638 u64 i;
1639
1640 if (RELOC(prom_iommu_off))
1641 return;
1642
1643 prom_debug("starting prom_initialize_tce_table\n");
1644
1645 /* Cache current top of allocs so we reserve a single block */
1646 local_alloc_top = RELOC(alloc_top_high);
1647 local_alloc_bottom = local_alloc_top;
1648
1649 /* Search all nodes looking for PHBs. */
1650 for (node = 0; prom_next_node(&node); ) {
1651 compatible[0] = 0;
1652 type[0] = 0;
1653 model[0] = 0;
1654 prom_getprop(node, "compatible",
1655 compatible, sizeof(compatible));
1656 prom_getprop(node, "device_type", type, sizeof(type));
1657 prom_getprop(node, "model", model, sizeof(model));
1658
1659 if ((type[0] == 0) || (strstr(type, RELOC("pci")) == NULL))
1660 continue;
1661
1662 /* Keep the old logic intact to avoid regression. */
1663 if (compatible[0] != 0) {
1664 if ((strstr(compatible, RELOC("python")) == NULL) &&
1665 (strstr(compatible, RELOC("Speedwagon")) == NULL) &&
1666 (strstr(compatible, RELOC("Winnipeg")) == NULL))
1667 continue;
1668 } else if (model[0] != 0) {
1669 if ((strstr(model, RELOC("ython")) == NULL) &&
1670 (strstr(model, RELOC("peedwagon")) == NULL) &&
1671 (strstr(model, RELOC("innipeg")) == NULL))
1672 continue;
1673 }
1674
1675 if (prom_getprop(node, "tce-table-minalign", &minalign,
1676 sizeof(minalign)) == PROM_ERROR)
1677 minalign = 0;
1678 if (prom_getprop(node, "tce-table-minsize", &minsize,
1679 sizeof(minsize)) == PROM_ERROR)
1680 minsize = 4UL << 20;
1681
1682 /*
1683 * Even though we read what OF wants, we just set the table
1684 * size to 4 MB. This is enough to map 2GB of PCI DMA space.
1685 * By doing this, we avoid the pitfalls of trying to DMA to
1686 * MMIO space and the DMA alias hole.
1687 *
1688 * On POWER4, firmware sets the TCE region by assuming
1689 * each TCE table is 8MB. Using this memory for anything
1690 * else will impact performance, so we always allocate 8MB.
1691 * Anton
1692 */
1693 if (__is_processor(PV_POWER4) || __is_processor(PV_POWER4p))
1694 minsize = 8UL << 20;
1695 else
1696 minsize = 4UL << 20;
1697
1698 /* Align to the greater of the align or size */
1699 align = max(minalign, minsize);
1700 base = alloc_down(minsize, align, 1);
1701 if (base == 0)
1702 prom_panic("ERROR, cannot find space for TCE table.\n");
1703 if (base < local_alloc_bottom)
1704 local_alloc_bottom = base;
1705
1706 /* It seems OF doesn't null-terminate the path :-( */
1707 memset(path, 0, PROM_SCRATCH_SIZE);
1708 /* Call OF to setup the TCE hardware */
1709 if (call_prom("package-to-path", 3, 1, node,
1710 path, PROM_SCRATCH_SIZE-1) == PROM_ERROR) {
1711 prom_printf("package-to-path failed\n");
1712 }
1713
1714 /* Save away the TCE table attributes for later use. */
1715 prom_setprop(node, path, "linux,tce-base", &base, sizeof(base));
1716 prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize));
1717
1718 prom_debug("TCE table: %s\n", path);
1719 prom_debug("\tnode = 0x%x\n", node);
1720 prom_debug("\tbase = 0x%x\n", base);
1721 prom_debug("\tsize = 0x%x\n", minsize);
1722
1723 /* Initialize the table to have a one-to-one mapping
1724 * over the allocated size.
1725 */
1726 tce_entryp = (u64 *)base;
1727 for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) {
1728 tce_entry = (i << PAGE_SHIFT);
1729 tce_entry |= 0x3;
1730 *tce_entryp = tce_entry;
1731 }
1732
1733 prom_printf("opening PHB %s", path);
1734 phb_node = call_prom("open", 1, 1, path);
1735 if (phb_node == 0)
1736 prom_printf("... failed\n");
1737 else
1738 prom_printf("... done\n");
1739
1740 call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"),
1741 phb_node, -1, minsize,
1742 (u32) base, (u32) (base >> 32));
1743 call_prom("close", 1, 0, phb_node);
1744 }
1745
1746 reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom);
1747
1748 /* These are only really needed if there is a memory limit in
1749 * effect, but we don't know so export them always. */
1750 RELOC(prom_tce_alloc_start) = local_alloc_bottom;
1751 RELOC(prom_tce_alloc_end) = local_alloc_top;
1752
1753 /* Flag the first invalid entry */
1754 prom_debug("ending prom_initialize_tce_table\n");
1755 }
1756 #endif
1757
1758 /*
1759 * With CHRP SMP we need to use the OF to start the other processors.
1760 * We can't wait until smp_boot_cpus (the OF is trashed by then)
1761 * so we have to put the processors into a holding pattern controlled
1762 * by the kernel (not OF) before we destroy the OF.
1763 *
1764 * This uses a chunk of low memory, puts some holding pattern
1765 * code there and sends the other processors off to there until
1766 * smp_boot_cpus tells them to do something. The holding pattern
1767 * checks that address until its cpu # is there, when it is that
1768 * cpu jumps to __secondary_start(). smp_boot_cpus() takes care
1769 * of setting those values.
1770 *
1771 * We also use physical address 0x4 here to tell when a cpu
1772 * is in its holding pattern code.
1773 *
1774 * -- Cort
1775 */
1776 /*
1777 * We want to reference the copy of __secondary_hold_* in the
1778 * 0 - 0x100 address range
1779 */
1780 #define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff)
1781
1782 static void __init prom_hold_cpus(void)
1783 {
1784 unsigned long i;
1785 unsigned int reg;
1786 phandle node;
1787 char type[64];
1788 struct prom_t *_prom = &RELOC(prom);
1789 unsigned long *spinloop
1790 = (void *) LOW_ADDR(__secondary_hold_spinloop);
1791 unsigned long *acknowledge
1792 = (void *) LOW_ADDR(__secondary_hold_acknowledge);
1793 unsigned long secondary_hold = LOW_ADDR(__secondary_hold);
1794
1795 prom_debug("prom_hold_cpus: start...\n");
1796 prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop);
1797 prom_debug(" 1) *spinloop = 0x%x\n", *spinloop);
1798 prom_debug(" 1) acknowledge = 0x%x\n",
1799 (unsigned long)acknowledge);
1800 prom_debug(" 1) *acknowledge = 0x%x\n", *acknowledge);
1801 prom_debug(" 1) secondary_hold = 0x%x\n", secondary_hold);
1802
1803 /* Set the common spinloop variable, so all of the secondary cpus
1804 * will block when they are awakened from their OF spinloop.
1805 * This must occur for both SMP and non SMP kernels, since OF will
1806 * be trashed when we move the kernel.
1807 */
1808 *spinloop = 0;
1809
1810 /* look for cpus */
1811 for (node = 0; prom_next_node(&node); ) {
1812 type[0] = 0;
1813 prom_getprop(node, "device_type", type, sizeof(type));
1814 if (strcmp(type, RELOC("cpu")) != 0)
1815 continue;
1816
1817 /* Skip non-configured cpus. */
1818 if (prom_getprop(node, "status", type, sizeof(type)) > 0)
1819 if (strcmp(type, RELOC("okay")) != 0)
1820 continue;
1821
1822 reg = -1;
1823 prom_getprop(node, "reg", &reg, sizeof(reg));
1824
1825 prom_debug("cpu hw idx = %lu\n", reg);
1826
1827 /* Init the acknowledge var which will be reset by
1828 * the secondary cpu when it awakens from its OF
1829 * spinloop.
1830 */
1831 *acknowledge = (unsigned long)-1;
1832
1833 if (reg != _prom->cpu) {
1834 /* Primary Thread of non-boot cpu or any thread */
1835 prom_printf("starting cpu hw idx %lu... ", reg);
1836 call_prom("start-cpu", 3, 0, node,
1837 secondary_hold, reg);
1838
1839 for (i = 0; (i < 100000000) &&
1840 (*acknowledge == ((unsigned long)-1)); i++ )
1841 mb();
1842
1843 if (*acknowledge == reg)
1844 prom_printf("done\n");
1845 else
1846 prom_printf("failed: %x\n", *acknowledge);
1847 }
1848 #ifdef CONFIG_SMP
1849 else
1850 prom_printf("boot cpu hw idx %lu\n", reg);
1851 #endif /* CONFIG_SMP */
1852 }
1853
1854 prom_debug("prom_hold_cpus: end...\n");
1855 }
1856
1857
1858 static void __init prom_init_client_services(unsigned long pp)
1859 {
1860 struct prom_t *_prom = &RELOC(prom);
1861
1862 /* Get a handle to the prom entry point before anything else */
1863 RELOC(prom_entry) = pp;
1864
1865 /* get a handle for the stdout device */
1866 _prom->chosen = call_prom("finddevice", 1, 1, ADDR("/chosen"));
1867 if (!PHANDLE_VALID(_prom->chosen))
1868 prom_panic("cannot find chosen"); /* msg won't be printed :( */
1869
1870 /* get device tree root */
1871 _prom->root = call_prom("finddevice", 1, 1, ADDR("/"));
1872 if (!PHANDLE_VALID(_prom->root))
1873 prom_panic("cannot find device tree root"); /* msg won't be printed :( */
1874
1875 _prom->mmumap = 0;
1876 }
1877
1878 #ifdef CONFIG_PPC32
1879 /*
1880 * For really old powermacs, we need to map things we claim.
1881 * For that, we need the ihandle of the mmu.
1882 * Also, on the longtrail, we need to work around other bugs.
1883 */
1884 static void __init prom_find_mmu(void)
1885 {
1886 struct prom_t *_prom = &RELOC(prom);
1887 phandle oprom;
1888 char version[64];
1889
1890 oprom = call_prom("finddevice", 1, 1, ADDR("/openprom"));
1891 if (!PHANDLE_VALID(oprom))
1892 return;
1893 if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0)
1894 return;
1895 version[sizeof(version) - 1] = 0;
1896 /* XXX might need to add other versions here */
1897 if (strcmp(version, "Open Firmware, 1.0.5") == 0)
1898 of_workarounds = OF_WA_CLAIM;
1899 else if (strncmp(version, "FirmWorks,3.", 12) == 0) {
1900 of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL;
1901 call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim");
1902 } else
1903 return;
1904 _prom->memory = call_prom("open", 1, 1, ADDR("/memory"));
1905 prom_getprop(_prom->chosen, "mmu", &_prom->mmumap,
1906 sizeof(_prom->mmumap));
1907 if (!IHANDLE_VALID(_prom->memory) || !IHANDLE_VALID(_prom->mmumap))
1908 of_workarounds &= ~OF_WA_CLAIM; /* hmmm */
1909 }
1910 #else
1911 #define prom_find_mmu()
1912 #endif
1913
1914 static void __init prom_init_stdout(void)
1915 {
1916 struct prom_t *_prom = &RELOC(prom);
1917 char *path = RELOC(of_stdout_device);
1918 char type[16];
1919 u32 val;
1920
1921 if (prom_getprop(_prom->chosen, "stdout", &val, sizeof(val)) <= 0)
1922 prom_panic("cannot find stdout");
1923
1924 _prom->stdout = val;
1925
1926 /* Get the full OF pathname of the stdout device */
1927 memset(path, 0, 256);
1928 call_prom("instance-to-path", 3, 1, _prom->stdout, path, 255);
1929 val = call_prom("instance-to-package", 1, 1, _prom->stdout);
1930 prom_setprop(_prom->chosen, "/chosen", "linux,stdout-package",
1931 &val, sizeof(val));
1932 prom_printf("OF stdout device is: %s\n", RELOC(of_stdout_device));
1933 prom_setprop(_prom->chosen, "/chosen", "linux,stdout-path",
1934 path, strlen(path) + 1);
1935
1936 /* If it's a display, note it */
1937 memset(type, 0, sizeof(type));
1938 prom_getprop(val, "device_type", type, sizeof(type));
1939 if (strcmp(type, RELOC("display")) == 0)
1940 prom_setprop(val, path, "linux,boot-display", NULL, 0);
1941 }
1942
1943 static int __init prom_find_machine_type(void)
1944 {
1945 struct prom_t *_prom = &RELOC(prom);
1946 char compat[256];
1947 int len, i = 0;
1948 #ifdef CONFIG_PPC64
1949 phandle rtas;
1950 int x;
1951 #endif
1952
1953 /* Look for a PowerMac or a Cell */
1954 len = prom_getprop(_prom->root, "compatible",
1955 compat, sizeof(compat)-1);
1956 if (len > 0) {
1957 compat[len] = 0;
1958 while (i < len) {
1959 char *p = &compat[i];
1960 int sl = strlen(p);
1961 if (sl == 0)
1962 break;
1963 if (strstr(p, RELOC("Power Macintosh")) ||
1964 strstr(p, RELOC("MacRISC")))
1965 return PLATFORM_POWERMAC;
1966 #ifdef CONFIG_PPC64
1967 /* We must make sure we don't detect the IBM Cell
1968 * blades as pSeries due to some firmware issues,
1969 * so we do it here.
1970 */
1971 if (strstr(p, RELOC("IBM,CBEA")) ||
1972 strstr(p, RELOC("IBM,CPBW-1.0")))
1973 return PLATFORM_GENERIC;
1974 #endif /* CONFIG_PPC64 */
1975 i += sl + 1;
1976 }
1977 }
1978 #ifdef CONFIG_PPC64
1979 /* Try to detect OPAL */
1980 if (PHANDLE_VALID(call_prom("finddevice", 1, 1, ADDR("/ibm,opal"))))
1981 return PLATFORM_OPAL;
1982
1983 /* Try to figure out if it's an IBM pSeries or any other
1984 * PAPR compliant platform. We assume it is if :
1985 * - /device_type is "chrp" (please, do NOT use that for future
1986 * non-IBM designs !
1987 * - it has /rtas
1988 */
1989 len = prom_getprop(_prom->root, "device_type",
1990 compat, sizeof(compat)-1);
1991 if (len <= 0)
1992 return PLATFORM_GENERIC;
1993 if (strcmp(compat, RELOC("chrp")))
1994 return PLATFORM_GENERIC;
1995
1996 /* Default to pSeries. We need to know if we are running LPAR */
1997 rtas = call_prom("finddevice", 1, 1, ADDR("/rtas"));
1998 if (!PHANDLE_VALID(rtas))
1999 return PLATFORM_GENERIC;
2000 x = prom_getproplen(rtas, "ibm,hypertas-functions");
2001 if (x != PROM_ERROR) {
2002 prom_debug("Hypertas detected, assuming LPAR !\n");
2003 return PLATFORM_PSERIES_LPAR;
2004 }
2005 return PLATFORM_PSERIES;
2006 #else
2007 return PLATFORM_GENERIC;
2008 #endif
2009 }
2010
2011 static int __init prom_set_color(ihandle ih, int i, int r, int g, int b)
2012 {
2013 return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r);
2014 }
2015
2016 /*
2017 * If we have a display that we don't know how to drive,
2018 * we will want to try to execute OF's open method for it
2019 * later. However, OF will probably fall over if we do that
2020 * we've taken over the MMU.
2021 * So we check whether we will need to open the display,
2022 * and if so, open it now.
2023 */
2024 static void __init prom_check_displays(void)
2025 {
2026 char type[16], *path;
2027 phandle node;
2028 ihandle ih;
2029 int i;
2030
2031 static unsigned char default_colors[] = {
2032 0x00, 0x00, 0x00,
2033 0x00, 0x00, 0xaa,
2034 0x00, 0xaa, 0x00,
2035 0x00, 0xaa, 0xaa,
2036 0xaa, 0x00, 0x00,
2037 0xaa, 0x00, 0xaa,
2038 0xaa, 0xaa, 0x00,
2039 0xaa, 0xaa, 0xaa,
2040 0x55, 0x55, 0x55,
2041 0x55, 0x55, 0xff,
2042 0x55, 0xff, 0x55,
2043 0x55, 0xff, 0xff,
2044 0xff, 0x55, 0x55,
2045 0xff, 0x55, 0xff,
2046 0xff, 0xff, 0x55,
2047 0xff, 0xff, 0xff
2048 };
2049 const unsigned char *clut;
2050
2051 prom_debug("Looking for displays\n");
2052 for (node = 0; prom_next_node(&node); ) {
2053 memset(type, 0, sizeof(type));
2054 prom_getprop(node, "device_type", type, sizeof(type));
2055 if (strcmp(type, RELOC("display")) != 0)
2056 continue;
2057
2058 /* It seems OF doesn't null-terminate the path :-( */
2059 path = RELOC(prom_scratch);
2060 memset(path, 0, PROM_SCRATCH_SIZE);
2061
2062 /*
2063 * leave some room at the end of the path for appending extra
2064 * arguments
2065 */
2066 if (call_prom("package-to-path", 3, 1, node, path,
2067 PROM_SCRATCH_SIZE-10) == PROM_ERROR)
2068 continue;
2069 prom_printf("found display : %s, opening... ", path);
2070
2071 ih = call_prom("open", 1, 1, path);
2072 if (ih == 0) {
2073 prom_printf("failed\n");
2074 continue;
2075 }
2076
2077 /* Success */
2078 prom_printf("done\n");
2079 prom_setprop(node, path, "linux,opened", NULL, 0);
2080
2081 /* Setup a usable color table when the appropriate
2082 * method is available. Should update this to set-colors */
2083 clut = RELOC(default_colors);
2084 for (i = 0; i < 32; i++, clut += 3)
2085 if (prom_set_color(ih, i, clut[0], clut[1],
2086 clut[2]) != 0)
2087 break;
2088
2089 #ifdef CONFIG_LOGO_LINUX_CLUT224
2090 clut = PTRRELOC(RELOC(logo_linux_clut224.clut));
2091 for (i = 0; i < RELOC(logo_linux_clut224.clutsize); i++, clut += 3)
2092 if (prom_set_color(ih, i + 32, clut[0], clut[1],
2093 clut[2]) != 0)
2094 break;
2095 #endif /* CONFIG_LOGO_LINUX_CLUT224 */
2096 }
2097 }
2098
2099
2100 /* Return (relocated) pointer to this much memory: moves initrd if reqd. */
2101 static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end,
2102 unsigned long needed, unsigned long align)
2103 {
2104 void *ret;
2105
2106 *mem_start = _ALIGN(*mem_start, align);
2107 while ((*mem_start + needed) > *mem_end) {
2108 unsigned long room, chunk;
2109
2110 prom_debug("Chunk exhausted, claiming more at %x...\n",
2111 RELOC(alloc_bottom));
2112 room = RELOC(alloc_top) - RELOC(alloc_bottom);
2113 if (room > DEVTREE_CHUNK_SIZE)
2114 room = DEVTREE_CHUNK_SIZE;
2115 if (room < PAGE_SIZE)
2116 prom_panic("No memory for flatten_device_tree "
2117 "(no room)\n");
2118 chunk = alloc_up(room, 0);
2119 if (chunk == 0)
2120 prom_panic("No memory for flatten_device_tree "
2121 "(claim failed)\n");
2122 *mem_end = chunk + room;
2123 }
2124
2125 ret = (void *)*mem_start;
2126 *mem_start += needed;
2127
2128 return ret;
2129 }
2130
2131 #define dt_push_token(token, mem_start, mem_end) \
2132 do { *((u32 *)make_room(mem_start, mem_end, 4, 4)) = token; } while(0)
2133
2134 static unsigned long __init dt_find_string(char *str)
2135 {
2136 char *s, *os;
2137
2138 s = os = (char *)RELOC(dt_string_start);
2139 s += 4;
2140 while (s < (char *)RELOC(dt_string_end)) {
2141 if (strcmp(s, str) == 0)
2142 return s - os;
2143 s += strlen(s) + 1;
2144 }
2145 return 0;
2146 }
2147
2148 /*
2149 * The Open Firmware 1275 specification states properties must be 31 bytes or
2150 * less, however not all firmwares obey this. Make it 64 bytes to be safe.
2151 */
2152 #define MAX_PROPERTY_NAME 64
2153
2154 static void __init scan_dt_build_strings(phandle node,
2155 unsigned long *mem_start,
2156 unsigned long *mem_end)
2157 {
2158 char *prev_name, *namep, *sstart;
2159 unsigned long soff;
2160 phandle child;
2161
2162 sstart = (char *)RELOC(dt_string_start);
2163
2164 /* get and store all property names */
2165 prev_name = RELOC("");
2166 for (;;) {
2167 /* 64 is max len of name including nul. */
2168 namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1);
2169 if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) {
2170 /* No more nodes: unwind alloc */
2171 *mem_start = (unsigned long)namep;
2172 break;
2173 }
2174
2175 /* skip "name" */
2176 if (strcmp(namep, RELOC("name")) == 0) {
2177 *mem_start = (unsigned long)namep;
2178 prev_name = RELOC("name");
2179 continue;
2180 }
2181 /* get/create string entry */
2182 soff = dt_find_string(namep);
2183 if (soff != 0) {
2184 *mem_start = (unsigned long)namep;
2185 namep = sstart + soff;
2186 } else {
2187 /* Trim off some if we can */
2188 *mem_start = (unsigned long)namep + strlen(namep) + 1;
2189 RELOC(dt_string_end) = *mem_start;
2190 }
2191 prev_name = namep;
2192 }
2193
2194 /* do all our children */
2195 child = call_prom("child", 1, 1, node);
2196 while (child != 0) {
2197 scan_dt_build_strings(child, mem_start, mem_end);
2198 child = call_prom("peer", 1, 1, child);
2199 }
2200 }
2201
2202 static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
2203 unsigned long *mem_end)
2204 {
2205 phandle child;
2206 char *namep, *prev_name, *sstart, *p, *ep, *lp, *path;
2207 unsigned long soff;
2208 unsigned char *valp;
2209 static char pname[MAX_PROPERTY_NAME];
2210 int l, room, has_phandle = 0;
2211
2212 dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end);
2213
2214 /* get the node's full name */
2215 namep = (char *)*mem_start;
2216 room = *mem_end - *mem_start;
2217 if (room > 255)
2218 room = 255;
2219 l = call_prom("package-to-path", 3, 1, node, namep, room);
2220 if (l >= 0) {
2221 /* Didn't fit? Get more room. */
2222 if (l >= room) {
2223 if (l >= *mem_end - *mem_start)
2224 namep = make_room(mem_start, mem_end, l+1, 1);
2225 call_prom("package-to-path", 3, 1, node, namep, l);
2226 }
2227 namep[l] = '\0';
2228
2229 /* Fixup an Apple bug where they have bogus \0 chars in the
2230 * middle of the path in some properties, and extract
2231 * the unit name (everything after the last '/').
2232 */
2233 for (lp = p = namep, ep = namep + l; p < ep; p++) {
2234 if (*p == '/')
2235 lp = namep;
2236 else if (*p != 0)
2237 *lp++ = *p;
2238 }
2239 *lp = 0;
2240 *mem_start = _ALIGN((unsigned long)lp + 1, 4);
2241 }
2242
2243 /* get it again for debugging */
2244 path = RELOC(prom_scratch);
2245 memset(path, 0, PROM_SCRATCH_SIZE);
2246 call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1);
2247
2248 /* get and store all properties */
2249 prev_name = RELOC("");
2250 sstart = (char *)RELOC(dt_string_start);
2251 for (;;) {
2252 if (call_prom("nextprop", 3, 1, node, prev_name,
2253 RELOC(pname)) != 1)
2254 break;
2255
2256 /* skip "name" */
2257 if (strcmp(RELOC(pname), RELOC("name")) == 0) {
2258 prev_name = RELOC("name");
2259 continue;
2260 }
2261
2262 /* find string offset */
2263 soff = dt_find_string(RELOC(pname));
2264 if (soff == 0) {
2265 prom_printf("WARNING: Can't find string index for"
2266 " <%s>, node %s\n", RELOC(pname), path);
2267 break;
2268 }
2269 prev_name = sstart + soff;
2270
2271 /* get length */
2272 l = call_prom("getproplen", 2, 1, node, RELOC(pname));
2273
2274 /* sanity checks */
2275 if (l == PROM_ERROR)
2276 continue;
2277 if (l > MAX_PROPERTY_LENGTH) {
2278 prom_printf("WARNING: ignoring large property ");
2279 /* It seems OF doesn't null-terminate the path :-( */
2280 prom_printf("[%s] ", path);
2281 prom_printf("%s length 0x%x\n", RELOC(pname), l);
2282 continue;
2283 }
2284
2285 /* push property head */
2286 dt_push_token(OF_DT_PROP, mem_start, mem_end);
2287 dt_push_token(l, mem_start, mem_end);
2288 dt_push_token(soff, mem_start, mem_end);
2289
2290 /* push property content */
2291 valp = make_room(mem_start, mem_end, l, 4);
2292 call_prom("getprop", 4, 1, node, RELOC(pname), valp, l);
2293 *mem_start = _ALIGN(*mem_start, 4);
2294
2295 if (!strcmp(RELOC(pname), RELOC("phandle")))
2296 has_phandle = 1;
2297 }
2298
2299 /* Add a "linux,phandle" property if no "phandle" property already
2300 * existed (can happen with OPAL)
2301 */
2302 if (!has_phandle) {
2303 soff = dt_find_string(RELOC("linux,phandle"));
2304 if (soff == 0)
2305 prom_printf("WARNING: Can't find string index for"
2306 " <linux-phandle> node %s\n", path);
2307 else {
2308 dt_push_token(OF_DT_PROP, mem_start, mem_end);
2309 dt_push_token(4, mem_start, mem_end);
2310 dt_push_token(soff, mem_start, mem_end);
2311 valp = make_room(mem_start, mem_end, 4, 4);
2312 *(u32 *)valp = node;
2313 }
2314 }
2315
2316 /* do all our children */
2317 child = call_prom("child", 1, 1, node);
2318 while (child != 0) {
2319 scan_dt_build_struct(child, mem_start, mem_end);
2320 child = call_prom("peer", 1, 1, child);
2321 }
2322
2323 dt_push_token(OF_DT_END_NODE, mem_start, mem_end);
2324 }
2325
2326 static void __init flatten_device_tree(void)
2327 {
2328 phandle root;
2329 unsigned long mem_start, mem_end, room;
2330 struct boot_param_header *hdr;
2331 struct prom_t *_prom = &RELOC(prom);
2332 char *namep;
2333 u64 *rsvmap;
2334
2335 /*
2336 * Check how much room we have between alloc top & bottom (+/- a
2337 * few pages), crop to 1MB, as this is our "chunk" size
2338 */
2339 room = RELOC(alloc_top) - RELOC(alloc_bottom) - 0x4000;
2340 if (room > DEVTREE_CHUNK_SIZE)
2341 room = DEVTREE_CHUNK_SIZE;
2342 prom_debug("starting device tree allocs at %x\n", RELOC(alloc_bottom));
2343
2344 /* Now try to claim that */
2345 mem_start = (unsigned long)alloc_up(room, PAGE_SIZE);
2346 if (mem_start == 0)
2347 prom_panic("Can't allocate initial device-tree chunk\n");
2348 mem_end = mem_start + room;
2349
2350 /* Get root of tree */
2351 root = call_prom("peer", 1, 1, (phandle)0);
2352 if (root == (phandle)0)
2353 prom_panic ("couldn't get device tree root\n");
2354
2355 /* Build header and make room for mem rsv map */
2356 mem_start = _ALIGN(mem_start, 4);
2357 hdr = make_room(&mem_start, &mem_end,
2358 sizeof(struct boot_param_header), 4);
2359 RELOC(dt_header_start) = (unsigned long)hdr;
2360 rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8);
2361
2362 /* Start of strings */
2363 mem_start = PAGE_ALIGN(mem_start);
2364 RELOC(dt_string_start) = mem_start;
2365 mem_start += 4; /* hole */
2366
2367 /* Add "linux,phandle" in there, we'll need it */
2368 namep = make_room(&mem_start, &mem_end, 16, 1);
2369 strcpy(namep, RELOC("linux,phandle"));
2370 mem_start = (unsigned long)namep + strlen(namep) + 1;
2371
2372 /* Build string array */
2373 prom_printf("Building dt strings...\n");
2374 scan_dt_build_strings(root, &mem_start, &mem_end);
2375 RELOC(dt_string_end) = mem_start;
2376
2377 /* Build structure */
2378 mem_start = PAGE_ALIGN(mem_start);
2379 RELOC(dt_struct_start) = mem_start;
2380 prom_printf("Building dt structure...\n");
2381 scan_dt_build_struct(root, &mem_start, &mem_end);
2382 dt_push_token(OF_DT_END, &mem_start, &mem_end);
2383 RELOC(dt_struct_end) = PAGE_ALIGN(mem_start);
2384
2385 /* Finish header */
2386 hdr->boot_cpuid_phys = _prom->cpu;
2387 hdr->magic = OF_DT_HEADER;
2388 hdr->totalsize = RELOC(dt_struct_end) - RELOC(dt_header_start);
2389 hdr->off_dt_struct = RELOC(dt_struct_start) - RELOC(dt_header_start);
2390 hdr->off_dt_strings = RELOC(dt_string_start) - RELOC(dt_header_start);
2391 hdr->dt_strings_size = RELOC(dt_string_end) - RELOC(dt_string_start);
2392 hdr->off_mem_rsvmap = ((unsigned long)rsvmap) - RELOC(dt_header_start);
2393 hdr->version = OF_DT_VERSION;
2394 /* Version 16 is not backward compatible */
2395 hdr->last_comp_version = 0x10;
2396
2397 /* Copy the reserve map in */
2398 memcpy(rsvmap, RELOC(mem_reserve_map), sizeof(mem_reserve_map));
2399
2400 #ifdef DEBUG_PROM
2401 {
2402 int i;
2403 prom_printf("reserved memory map:\n");
2404 for (i = 0; i < RELOC(mem_reserve_cnt); i++)
2405 prom_printf(" %x - %x\n",
2406 RELOC(mem_reserve_map)[i].base,
2407 RELOC(mem_reserve_map)[i].size);
2408 }
2409 #endif
2410 /* Bump mem_reserve_cnt to cause further reservations to fail
2411 * since it's too late.
2412 */
2413 RELOC(mem_reserve_cnt) = MEM_RESERVE_MAP_SIZE;
2414
2415 prom_printf("Device tree strings 0x%x -> 0x%x\n",
2416 RELOC(dt_string_start), RELOC(dt_string_end));
2417 prom_printf("Device tree struct 0x%x -> 0x%x\n",
2418 RELOC(dt_struct_start), RELOC(dt_struct_end));
2419
2420 }
2421
2422 #ifdef CONFIG_PPC_MAPLE
2423 /* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property.
2424 * The values are bad, and it doesn't even have the right number of cells. */
2425 static void __init fixup_device_tree_maple(void)
2426 {
2427 phandle isa;
2428 u32 rloc = 0x01002000; /* IO space; PCI device = 4 */
2429 u32 isa_ranges[6];
2430 char *name;
2431
2432 name = "/ht@0/isa@4";
2433 isa = call_prom("finddevice", 1, 1, ADDR(name));
2434 if (!PHANDLE_VALID(isa)) {
2435 name = "/ht@0/isa@6";
2436 isa = call_prom("finddevice", 1, 1, ADDR(name));
2437 rloc = 0x01003000; /* IO space; PCI device = 6 */
2438 }
2439 if (!PHANDLE_VALID(isa))
2440 return;
2441
2442 if (prom_getproplen(isa, "ranges") != 12)
2443 return;
2444 if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges))
2445 == PROM_ERROR)
2446 return;
2447
2448 if (isa_ranges[0] != 0x1 ||
2449 isa_ranges[1] != 0xf4000000 ||
2450 isa_ranges[2] != 0x00010000)
2451 return;
2452
2453 prom_printf("Fixing up bogus ISA range on Maple/Apache...\n");
2454
2455 isa_ranges[0] = 0x1;
2456 isa_ranges[1] = 0x0;
2457 isa_ranges[2] = rloc;
2458 isa_ranges[3] = 0x0;
2459 isa_ranges[4] = 0x0;
2460 isa_ranges[5] = 0x00010000;
2461 prom_setprop(isa, name, "ranges",
2462 isa_ranges, sizeof(isa_ranges));
2463 }
2464
2465 #define CPC925_MC_START 0xf8000000
2466 #define CPC925_MC_LENGTH 0x1000000
2467 /* The values for memory-controller don't have right number of cells */
2468 static void __init fixup_device_tree_maple_memory_controller(void)
2469 {
2470 phandle mc;
2471 u32 mc_reg[4];
2472 char *name = "/hostbridge@f8000000";
2473 struct prom_t *_prom = &RELOC(prom);
2474 u32 ac, sc;
2475
2476 mc = call_prom("finddevice", 1, 1, ADDR(name));
2477 if (!PHANDLE_VALID(mc))
2478 return;
2479
2480 if (prom_getproplen(mc, "reg") != 8)
2481 return;
2482
2483 prom_getprop(_prom->root, "#address-cells", &ac, sizeof(ac));
2484 prom_getprop(_prom->root, "#size-cells", &sc, sizeof(sc));
2485 if ((ac != 2) || (sc != 2))
2486 return;
2487
2488 if (prom_getprop(mc, "reg", mc_reg, sizeof(mc_reg)) == PROM_ERROR)
2489 return;
2490
2491 if (mc_reg[0] != CPC925_MC_START || mc_reg[1] != CPC925_MC_LENGTH)
2492 return;
2493
2494 prom_printf("Fixing up bogus hostbridge on Maple...\n");
2495
2496 mc_reg[0] = 0x0;
2497 mc_reg[1] = CPC925_MC_START;
2498 mc_reg[2] = 0x0;
2499 mc_reg[3] = CPC925_MC_LENGTH;
2500 prom_setprop(mc, name, "reg", mc_reg, sizeof(mc_reg));
2501 }
2502 #else
2503 #define fixup_device_tree_maple()
2504 #define fixup_device_tree_maple_memory_controller()
2505 #endif
2506
2507 #ifdef CONFIG_PPC_CHRP
2508 /*
2509 * Pegasos and BriQ lacks the "ranges" property in the isa node
2510 * Pegasos needs decimal IRQ 14/15, not hexadecimal
2511 * Pegasos has the IDE configured in legacy mode, but advertised as native
2512 */
2513 static void __init fixup_device_tree_chrp(void)
2514 {
2515 phandle ph;
2516 u32 prop[6];
2517 u32 rloc = 0x01006000; /* IO space; PCI device = 12 */
2518 char *name;
2519 int rc;
2520
2521 name = "/pci@80000000/isa@c";
2522 ph = call_prom("finddevice", 1, 1, ADDR(name));
2523 if (!PHANDLE_VALID(ph)) {
2524 name = "/pci@ff500000/isa@6";
2525 ph = call_prom("finddevice", 1, 1, ADDR(name));
2526 rloc = 0x01003000; /* IO space; PCI device = 6 */
2527 }
2528 if (PHANDLE_VALID(ph)) {
2529 rc = prom_getproplen(ph, "ranges");
2530 if (rc == 0 || rc == PROM_ERROR) {
2531 prom_printf("Fixing up missing ISA range on Pegasos...\n");
2532
2533 prop[0] = 0x1;
2534 prop[1] = 0x0;
2535 prop[2] = rloc;
2536 prop[3] = 0x0;
2537 prop[4] = 0x0;
2538 prop[5] = 0x00010000;
2539 prom_setprop(ph, name, "ranges", prop, sizeof(prop));
2540 }
2541 }
2542
2543 name = "/pci@80000000/ide@C,1";
2544 ph = call_prom("finddevice", 1, 1, ADDR(name));
2545 if (PHANDLE_VALID(ph)) {
2546 prom_printf("Fixing up IDE interrupt on Pegasos...\n");
2547 prop[0] = 14;
2548 prop[1] = 0x0;
2549 prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32));
2550 prom_printf("Fixing up IDE class-code on Pegasos...\n");
2551 rc = prom_getprop(ph, "class-code", prop, sizeof(u32));
2552 if (rc == sizeof(u32)) {
2553 prop[0] &= ~0x5;
2554 prom_setprop(ph, name, "class-code", prop, sizeof(u32));
2555 }
2556 }
2557 }
2558 #else
2559 #define fixup_device_tree_chrp()
2560 #endif
2561
2562 #if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)
2563 static void __init fixup_device_tree_pmac(void)
2564 {
2565 phandle u3, i2c, mpic;
2566 u32 u3_rev;
2567 u32 interrupts[2];
2568 u32 parent;
2569
2570 /* Some G5s have a missing interrupt definition, fix it up here */
2571 u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000"));
2572 if (!PHANDLE_VALID(u3))
2573 return;
2574 i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000"));
2575 if (!PHANDLE_VALID(i2c))
2576 return;
2577 mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000"));
2578 if (!PHANDLE_VALID(mpic))
2579 return;
2580
2581 /* check if proper rev of u3 */
2582 if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev))
2583 == PROM_ERROR)
2584 return;
2585 if (u3_rev < 0x35 || u3_rev > 0x39)
2586 return;
2587 /* does it need fixup ? */
2588 if (prom_getproplen(i2c, "interrupts") > 0)
2589 return;
2590
2591 prom_printf("fixing up bogus interrupts for u3 i2c...\n");
2592
2593 /* interrupt on this revision of u3 is number 0 and level */
2594 interrupts[0] = 0;
2595 interrupts[1] = 1;
2596 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts",
2597 &interrupts, sizeof(interrupts));
2598 parent = (u32)mpic;
2599 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent",
2600 &parent, sizeof(parent));
2601 }
2602 #else
2603 #define fixup_device_tree_pmac()
2604 #endif
2605
2606 #ifdef CONFIG_PPC_EFIKA
2607 /*
2608 * The MPC5200 FEC driver requires an phy-handle property to tell it how
2609 * to talk to the phy. If the phy-handle property is missing, then this
2610 * function is called to add the appropriate nodes and link it to the
2611 * ethernet node.
2612 */
2613 static void __init fixup_device_tree_efika_add_phy(void)
2614 {
2615 u32 node;
2616 char prop[64];
2617 int rv;
2618
2619 /* Check if /builtin/ethernet exists - bail if it doesn't */
2620 node = call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet"));
2621 if (!PHANDLE_VALID(node))
2622 return;
2623
2624 /* Check if the phy-handle property exists - bail if it does */
2625 rv = prom_getprop(node, "phy-handle", prop, sizeof(prop));
2626 if (!rv)
2627 return;
2628
2629 /*
2630 * At this point the ethernet device doesn't have a phy described.
2631 * Now we need to add the missing phy node and linkage
2632 */
2633
2634 /* Check for an MDIO bus node - if missing then create one */
2635 node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio"));
2636 if (!PHANDLE_VALID(node)) {
2637 prom_printf("Adding Ethernet MDIO node\n");
2638 call_prom("interpret", 1, 1,
2639 " s\" /builtin\" find-device"
2640 " new-device"
2641 " 1 encode-int s\" #address-cells\" property"
2642 " 0 encode-int s\" #size-cells\" property"
2643 " s\" mdio\" device-name"
2644 " s\" fsl,mpc5200b-mdio\" encode-string"
2645 " s\" compatible\" property"
2646 " 0xf0003000 0x400 reg"
2647 " 0x2 encode-int"
2648 " 0x5 encode-int encode+"
2649 " 0x3 encode-int encode+"
2650 " s\" interrupts\" property"
2651 " finish-device");
2652 };
2653
2654 /* Check for a PHY device node - if missing then create one and
2655 * give it's phandle to the ethernet node */
2656 node = call_prom("finddevice", 1, 1,
2657 ADDR("/builtin/mdio/ethernet-phy"));
2658 if (!PHANDLE_VALID(node)) {
2659 prom_printf("Adding Ethernet PHY node\n");
2660 call_prom("interpret", 1, 1,
2661 " s\" /builtin/mdio\" find-device"
2662 " new-device"
2663 " s\" ethernet-phy\" device-name"
2664 " 0x10 encode-int s\" reg\" property"
2665 " my-self"
2666 " ihandle>phandle"
2667 " finish-device"
2668 " s\" /builtin/ethernet\" find-device"
2669 " encode-int"
2670 " s\" phy-handle\" property"
2671 " device-end");
2672 }
2673 }
2674
2675 static void __init fixup_device_tree_efika(void)
2676 {
2677 int sound_irq[3] = { 2, 2, 0 };
2678 int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0,
2679 3,4,0, 3,5,0, 3,6,0, 3,7,0,
2680 3,8,0, 3,9,0, 3,10,0, 3,11,0,
2681 3,12,0, 3,13,0, 3,14,0, 3,15,0 };
2682 u32 node;
2683 char prop[64];
2684 int rv, len;
2685
2686 /* Check if we're really running on a EFIKA */
2687 node = call_prom("finddevice", 1, 1, ADDR("/"));
2688 if (!PHANDLE_VALID(node))
2689 return;
2690
2691 rv = prom_getprop(node, "model", prop, sizeof(prop));
2692 if (rv == PROM_ERROR)
2693 return;
2694 if (strcmp(prop, "EFIKA5K2"))
2695 return;
2696
2697 prom_printf("Applying EFIKA device tree fixups\n");
2698
2699 /* Claiming to be 'chrp' is death */
2700 node = call_prom("finddevice", 1, 1, ADDR("/"));
2701 rv = prom_getprop(node, "device_type", prop, sizeof(prop));
2702 if (rv != PROM_ERROR && (strcmp(prop, "chrp") == 0))
2703 prom_setprop(node, "/", "device_type", "efika", sizeof("efika"));
2704
2705 /* CODEGEN,description is exposed in /proc/cpuinfo so
2706 fix that too */
2707 rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop));
2708 if (rv != PROM_ERROR && (strstr(prop, "CHRP")))
2709 prom_setprop(node, "/", "CODEGEN,description",
2710 "Efika 5200B PowerPC System",
2711 sizeof("Efika 5200B PowerPC System"));
2712
2713 /* Fixup bestcomm interrupts property */
2714 node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm"));
2715 if (PHANDLE_VALID(node)) {
2716 len = prom_getproplen(node, "interrupts");
2717 if (len == 12) {
2718 prom_printf("Fixing bestcomm interrupts property\n");
2719 prom_setprop(node, "/builtin/bestcom", "interrupts",
2720 bcomm_irq, sizeof(bcomm_irq));
2721 }
2722 }
2723
2724 /* Fixup sound interrupts property */
2725 node = call_prom("finddevice", 1, 1, ADDR("/builtin/sound"));
2726 if (PHANDLE_VALID(node)) {
2727 rv = prom_getprop(node, "interrupts", prop, sizeof(prop));
2728 if (rv == PROM_ERROR) {
2729 prom_printf("Adding sound interrupts property\n");
2730 prom_setprop(node, "/builtin/sound", "interrupts",
2731 sound_irq, sizeof(sound_irq));
2732 }
2733 }
2734
2735 /* Make sure ethernet phy-handle property exists */
2736 fixup_device_tree_efika_add_phy();
2737 }
2738 #else
2739 #define fixup_device_tree_efika()
2740 #endif
2741
2742 static void __init fixup_device_tree(void)
2743 {
2744 fixup_device_tree_maple();
2745 fixup_device_tree_maple_memory_controller();
2746 fixup_device_tree_chrp();
2747 fixup_device_tree_pmac();
2748 fixup_device_tree_efika();
2749 }
2750
2751 static void __init prom_find_boot_cpu(void)
2752 {
2753 struct prom_t *_prom = &RELOC(prom);
2754 u32 getprop_rval;
2755 ihandle prom_cpu;
2756 phandle cpu_pkg;
2757
2758 _prom->cpu = 0;
2759 if (prom_getprop(_prom->chosen, "cpu", &prom_cpu, sizeof(prom_cpu)) <= 0)
2760 return;
2761
2762 cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu);
2763
2764 prom_getprop(cpu_pkg, "reg", &getprop_rval, sizeof(getprop_rval));
2765 _prom->cpu = getprop_rval;
2766
2767 prom_debug("Booting CPU hw index = %lu\n", _prom->cpu);
2768 }
2769
2770 static void __init prom_check_initrd(unsigned long r3, unsigned long r4)
2771 {
2772 #ifdef CONFIG_BLK_DEV_INITRD
2773 struct prom_t *_prom = &RELOC(prom);
2774
2775 if (r3 && r4 && r4 != 0xdeadbeef) {
2776 unsigned long val;
2777
2778 RELOC(prom_initrd_start) = is_kernel_addr(r3) ? __pa(r3) : r3;
2779 RELOC(prom_initrd_end) = RELOC(prom_initrd_start) + r4;
2780
2781 val = RELOC(prom_initrd_start);
2782 prom_setprop(_prom->chosen, "/chosen", "linux,initrd-start",
2783 &val, sizeof(val));
2784 val = RELOC(prom_initrd_end);
2785 prom_setprop(_prom->chosen, "/chosen", "linux,initrd-end",
2786 &val, sizeof(val));
2787
2788 reserve_mem(RELOC(prom_initrd_start),
2789 RELOC(prom_initrd_end) - RELOC(prom_initrd_start));
2790
2791 prom_debug("initrd_start=0x%x\n", RELOC(prom_initrd_start));
2792 prom_debug("initrd_end=0x%x\n", RELOC(prom_initrd_end));
2793 }
2794 #endif /* CONFIG_BLK_DEV_INITRD */
2795 }
2796
2797
2798 /*
2799 * We enter here early on, when the Open Firmware prom is still
2800 * handling exceptions and the MMU hash table for us.
2801 */
2802
2803 unsigned long __init prom_init(unsigned long r3, unsigned long r4,
2804 unsigned long pp,
2805 unsigned long r6, unsigned long r7,
2806 unsigned long kbase)
2807 {
2808 struct prom_t *_prom;
2809 unsigned long hdr;
2810
2811 #ifdef CONFIG_PPC32
2812 unsigned long offset = reloc_offset();
2813 reloc_got2(offset);
2814 #endif
2815
2816 _prom = &RELOC(prom);
2817
2818 /*
2819 * First zero the BSS
2820 */
2821 memset(&RELOC(__bss_start), 0, __bss_stop - __bss_start);
2822
2823 /*
2824 * Init interface to Open Firmware, get some node references,
2825 * like /chosen
2826 */
2827 prom_init_client_services(pp);
2828
2829 /*
2830 * See if this OF is old enough that we need to do explicit maps
2831 * and other workarounds
2832 */
2833 prom_find_mmu();
2834
2835 /*
2836 * Init prom stdout device
2837 */
2838 prom_init_stdout();
2839
2840 prom_printf("Preparing to boot %s", RELOC(linux_banner));
2841
2842 /*
2843 * Get default machine type. At this point, we do not differentiate
2844 * between pSeries SMP and pSeries LPAR
2845 */
2846 RELOC(of_platform) = prom_find_machine_type();
2847 prom_printf("Detected machine type: %x\n", RELOC(of_platform));
2848
2849 #ifndef CONFIG_RELOCATABLE
2850 /* Bail if this is a kdump kernel. */
2851 if (PHYSICAL_START > 0)
2852 prom_panic("Error: You can't boot a kdump kernel from OF!\n");
2853 #endif
2854
2855 /*
2856 * Check for an initrd
2857 */
2858 prom_check_initrd(r3, r4);
2859
2860 #if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
2861 /*
2862 * On pSeries, inform the firmware about our capabilities
2863 */
2864 if (RELOC(of_platform) == PLATFORM_PSERIES ||
2865 RELOC(of_platform) == PLATFORM_PSERIES_LPAR)
2866 prom_send_capabilities();
2867 #endif
2868
2869 /*
2870 * Copy the CPU hold code
2871 */
2872 if (RELOC(of_platform) != PLATFORM_POWERMAC)
2873 copy_and_flush(0, kbase, 0x100, 0);
2874
2875 /*
2876 * Do early parsing of command line
2877 */
2878 early_cmdline_parse();
2879
2880 /*
2881 * Initialize memory management within prom_init
2882 */
2883 prom_init_mem();
2884
2885 /*
2886 * Determine which cpu is actually running right _now_
2887 */
2888 prom_find_boot_cpu();
2889
2890 /*
2891 * Initialize display devices
2892 */
2893 prom_check_displays();
2894
2895 #ifdef CONFIG_PPC64
2896 /*
2897 * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else
2898 * that uses the allocator, we need to make sure we get the top of memory
2899 * available for us here...
2900 */
2901 if (RELOC(of_platform) == PLATFORM_PSERIES)
2902 prom_initialize_tce_table();
2903 #endif
2904
2905 /*
2906 * On non-powermacs, try to instantiate RTAS. PowerMacs don't
2907 * have a usable RTAS implementation.
2908 */
2909 if (RELOC(of_platform) != PLATFORM_POWERMAC &&
2910 RELOC(of_platform) != PLATFORM_OPAL)
2911 prom_instantiate_rtas();
2912
2913 #ifdef CONFIG_PPC_POWERNV
2914 /* Detect HAL and try instanciating it & doing takeover */
2915 if (RELOC(of_platform) == PLATFORM_PSERIES_LPAR) {
2916 prom_query_opal();
2917 if (RELOC(of_platform) == PLATFORM_OPAL) {
2918 prom_opal_hold_cpus();
2919 prom_opal_takeover();
2920 }
2921 } else if (RELOC(of_platform) == PLATFORM_OPAL)
2922 prom_instantiate_opal();
2923 #endif
2924
2925 /*
2926 * On non-powermacs, put all CPUs in spin-loops.
2927 *
2928 * PowerMacs use a different mechanism to spin CPUs
2929 */
2930 if (RELOC(of_platform) != PLATFORM_POWERMAC &&
2931 RELOC(of_platform) != PLATFORM_OPAL)
2932 prom_hold_cpus();
2933
2934 /*
2935 * Fill in some infos for use by the kernel later on
2936 */
2937 if (RELOC(prom_memory_limit))
2938 prom_setprop(_prom->chosen, "/chosen", "linux,memory-limit",
2939 &RELOC(prom_memory_limit),
2940 sizeof(prom_memory_limit));
2941 #ifdef CONFIG_PPC64
2942 if (RELOC(prom_iommu_off))
2943 prom_setprop(_prom->chosen, "/chosen", "linux,iommu-off",
2944 NULL, 0);
2945
2946 if (RELOC(prom_iommu_force_on))
2947 prom_setprop(_prom->chosen, "/chosen", "linux,iommu-force-on",
2948 NULL, 0);
2949
2950 if (RELOC(prom_tce_alloc_start)) {
2951 prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-start",
2952 &RELOC(prom_tce_alloc_start),
2953 sizeof(prom_tce_alloc_start));
2954 prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-end",
2955 &RELOC(prom_tce_alloc_end),
2956 sizeof(prom_tce_alloc_end));
2957 }
2958 #endif
2959
2960 /*
2961 * Fixup any known bugs in the device-tree
2962 */
2963 fixup_device_tree();
2964
2965 /*
2966 * Now finally create the flattened device-tree
2967 */
2968 prom_printf("copying OF device tree...\n");
2969 flatten_device_tree();
2970
2971 /*
2972 * in case stdin is USB and still active on IBM machines...
2973 * Unfortunately quiesce crashes on some powermacs if we have
2974 * closed stdin already (in particular the powerbook 101).
2975 */
2976 if (RELOC(of_platform) != PLATFORM_POWERMAC)
2977 prom_close_stdin();
2978
2979 /*
2980 * Call OF "quiesce" method to shut down pending DMA's from
2981 * devices etc...
2982 */
2983 prom_printf("Calling quiesce...\n");
2984 call_prom("quiesce", 0, 0);
2985
2986 /*
2987 * And finally, call the kernel passing it the flattened device
2988 * tree and NULL as r5, thus triggering the new entry point which
2989 * is common to us and kexec
2990 */
2991 hdr = RELOC(dt_header_start);
2992 prom_printf("returning from prom_init\n");
2993 prom_debug("->dt_header_start=0x%x\n", hdr);
2994
2995 #ifdef CONFIG_PPC32
2996 reloc_got2(-offset);
2997 #endif
2998
2999 #ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
3000 /* OPAL early debug gets the OPAL base & entry in r8 and r9 */
3001 __start(hdr, kbase, 0, 0, 0,
3002 RELOC(prom_opal_base), RELOC(prom_opal_entry));
3003 #else
3004 __start(hdr, kbase, 0, 0, 0, 0, 0);
3005 #endif
3006
3007 return 0;
3008 }