projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
powerpc: Fix typo s/leve/level/ in TLB code
[deliverable/linux.git] / arch / powerpc / kernel / prom_init.c
CommitLineData
9b6b563c
PM		 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>
9b6b563c
PM		 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>
9b6b563c
PM		 43#include <asm/btext.h>
44#include <asm/sections.h>
45#include <asm/machdep.h>
46
9b6b563c 47#include <linux/linux_logo.h>
9b6b563c
PM		 48
49/*
50 * Properties whose value is longer than this get excluded from our
51 * copy of the device tree. This value does need to be big enough to
52 * ensure that we don't lose things like the interrupt-map property
53 * on a PCI-PCI bridge.
54 */
55#define MAX_PROPERTY_LENGTH (1UL * 1024 * 1024)
56
57/*
58 * Eventually bump that one up
59 */
60#define DEVTREE_CHUNK_SIZE 0x100000
61
62/*
63 * This is the size of the local memory reserve map that gets copied
64 * into the boot params passed to the kernel. That size is totally
65 * flexible as the kernel just reads the list until it encounters an
66 * entry with size 0, so it can be changed without breaking binary
67 * compatibility
68 */
69#define MEM_RESERVE_MAP_SIZE 8
70
71/*
72 * prom_init() is called very early on, before the kernel text
73 * and data have been mapped to KERNELBASE. At this point the code
74 * is running at whatever address it has been loaded at.
75 * On ppc32 we compile with -mrelocatable, which means that references
76 * to extern and static variables get relocated automatically.
77 * On ppc64 we have to relocate the references explicitly with
78 * RELOC. (Note that strings count as static variables.)
79 *
80 * Because OF may have mapped I/O devices into the area starting at
81 * KERNELBASE, particularly on CHRP machines, we can't safely call
82 * OF once the kernel has been mapped to KERNELBASE. Therefore all
83 * OF calls must be done within prom_init().
84 *
85 * ADDR is used in calls to call_prom. The 4th and following
86 * arguments to call_prom should be 32-bit values.
87 * On ppc64, 64 bit values are truncated to 32 bits (and
88 * fortunately don't get interpreted as two arguments).
89 */
90#ifdef CONFIG_PPC64
91#define RELOC(x) (*PTRRELOC(&(x)))
92#define ADDR(x) (u32) add_reloc_offset((unsigned long)(x))
a23414be 93#define OF_WORKAROUNDS 0
9b6b563c
PM		 94#else
95#define RELOC(x) (x)
96#define ADDR(x) (u32) (x)
a23414be
PM		 97#define OF_WORKAROUNDS of_workarounds
98int of_workarounds;
9b6b563c
PM		 99#endif
100
a23414be
PM		 101#define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */
102#define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */
103
9b6b563c
PM		 104#define PROM_BUG() do { \
105 prom_printf("kernel BUG at %s line 0x%x!\n", \
106 RELOC(__FILE__), __LINE__); \
107 __asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \
108} while (0)
109
110#ifdef DEBUG_PROM
111#define prom_debug(x...) prom_printf(x)
112#else
113#define prom_debug(x...)
114#endif
115
9b6b563c
PM		 116
117typedef u32 prom_arg_t;
118
119struct prom_args {
120 u32 service;
121 u32 nargs;
122 u32 nret;
123 prom_arg_t args[10];
124};
125
126struct prom_t {
127 ihandle root;
a23414be 128 phandle chosen;
9b6b563c
PM		 129 int cpu;
130 ihandle stdout;
a575b807 131 ihandle mmumap;
a23414be 132 ihandle memory;
9b6b563c
PM		 133};
134
135struct mem_map_entry {
cbbcf340
KG		 136 u64 base;
137 u64 size;
9b6b563c
PM		 138};
139
140typedef u32 cell_t;
141
142extern void __start(unsigned long r3, unsigned long r4, unsigned long r5);
143
144#ifdef CONFIG_PPC64
c4988820 145extern int enter_prom(struct prom_args *args, unsigned long entry);
9b6b563c 146#else
c4988820 147static inline int enter_prom(struct prom_args *args, unsigned long entry)
9b6b563c 148{
c4988820 149 return ((int (*)(struct prom_args *))entry)(args);
9b6b563c
PM		 150}
151#endif
152
153extern void copy_and_flush(unsigned long dest, unsigned long src,
154 unsigned long size, unsigned long offset);
155
156/* prom structure */
157static struct prom_t __initdata prom;
158
159static unsigned long prom_entry __initdata;
160
161#define PROM_SCRATCH_SIZE 256
162
163static char __initdata of_stdout_device[256];
164static char __initdata prom_scratch[PROM_SCRATCH_SIZE];
165
166static unsigned long __initdata dt_header_start;
167static unsigned long __initdata dt_struct_start, dt_struct_end;
168static unsigned long __initdata dt_string_start, dt_string_end;
169
170static unsigned long __initdata prom_initrd_start, prom_initrd_end;
171
172#ifdef CONFIG_PPC64
165785e5
JK		 173static int __initdata prom_iommu_force_on;
174static int __initdata prom_iommu_off;
9b6b563c
PM		 175static unsigned long __initdata prom_tce_alloc_start;
176static unsigned long __initdata prom_tce_alloc_end;
177#endif
178
e8222502
BH		 179/* Platforms codes are now obsolete in the kernel. Now only used within this
180 * file and ultimately gone too. Feel free to change them if you need, they
181 * are not shared with anything outside of this file anymore
182 */
183#define PLATFORM_PSERIES 0x0100
184#define PLATFORM_PSERIES_LPAR 0x0101
185#define PLATFORM_LPAR 0x0001
186#define PLATFORM_POWERMAC 0x0400
187#define PLATFORM_GENERIC 0x0500
188
9b6b563c
PM		 189static int __initdata of_platform;
190
191static char __initdata prom_cmd_line[COMMAND_LINE_SIZE];
192
cf68787b
BK		 193static unsigned long __initdata prom_memory_limit;
194
9b6b563c
PM		 195static unsigned long __initdata alloc_top;
196static unsigned long __initdata alloc_top_high;
197static unsigned long __initdata alloc_bottom;
198static unsigned long __initdata rmo_top;
199static unsigned long __initdata ram_top;
200
201static struct mem_map_entry __initdata mem_reserve_map[MEM_RESERVE_MAP_SIZE];
202static int __initdata mem_reserve_cnt;
203
204static cell_t __initdata regbuf[1024];
205
206
9b6b563c
PM		 207/*
208 * Error results ... some OF calls will return "-1" on error, some
209 * will return 0, some will return either. To simplify, here are
210 * macros to use with any ihandle or phandle return value to check if
211 * it is valid
212 */
213
214#define PROM_ERROR (-1u)
215#define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR)
216#define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR)
217
218
219/* This is the one and *ONLY* place where we actually call open
220 * firmware.
221 */
222
223static int __init call_prom(const char *service, int nargs, int nret, ...)
224{
225 int i;
226 struct prom_args args;
227 va_list list;
228
229 args.service = ADDR(service);
230 args.nargs = nargs;
231 args.nret = nret;
232
233 va_start(list, nret);
234 for (i = 0; i < nargs; i++)
235 args.args[i] = va_arg(list, prom_arg_t);
236 va_end(list);
237
238 for (i = 0; i < nret; i++)
239 args.args[nargs+i] = 0;
240
c4988820
PM		 241 if (enter_prom(&args, RELOC(prom_entry)) < 0)
242 return PROM_ERROR;
9b6b563c
PM		 243
244 return (nret > 0) ? args.args[nargs] : 0;
245}
246
247static int __init call_prom_ret(const char *service, int nargs, int nret,
248 prom_arg_t *rets, ...)
249{
250 int i;
251 struct prom_args args;
252 va_list list;
253
254 args.service = ADDR(service);
255 args.nargs = nargs;
256 args.nret = nret;
257
258 va_start(list, rets);
259 for (i = 0; i < nargs; i++)
260 args.args[i] = va_arg(list, prom_arg_t);
261 va_end(list);
262
263 for (i = 0; i < nret; i++)
ed1189b7 264 args.args[nargs+i] = 0;
9b6b563c 265
c4988820
PM		 266 if (enter_prom(&args, RELOC(prom_entry)) < 0)
267 return PROM_ERROR;
9b6b563c
PM		 268
269 if (rets != NULL)
270 for (i = 1; i < nret; ++i)
c5200c90 271 rets[i-1] = args.args[nargs+i];
9b6b563c
PM		 272
273 return (nret > 0) ? args.args[nargs] : 0;
274}
275
276
9b6b563c
PM		 277static void __init prom_print(const char *msg)
278{
279 const char *p, *q;
280 struct prom_t *_prom = &RELOC(prom);
281
282 if (_prom->stdout == 0)
283 return;
284
285 for (p = msg; *p != 0; p = q) {
286 for (q = p; *q != 0 && *q != '\n'; ++q)
287 ;
288 if (q > p)
289 call_prom("write", 3, 1, _prom->stdout, p, q - p);
290 if (*q == 0)
291 break;
292 ++q;
293 call_prom("write", 3, 1, _prom->stdout, ADDR("\r\n"), 2);
294 }
295}
296
297
298static void __init prom_print_hex(unsigned long val)
299{
300 int i, nibbles = sizeof(val)*2;
301 char buf[sizeof(val)*2+1];
302 struct prom_t *_prom = &RELOC(prom);
303
304 for (i = nibbles-1; i >= 0; i--) {
305 buf[i] = (val & 0xf) + '0';
306 if (buf[i] > '9')
307 buf[i] += ('a'-'0'-10);
308 val >>= 4;
309 }
310 buf[nibbles] = '\0';
311 call_prom("write", 3, 1, _prom->stdout, buf, nibbles);
312}
313
314
315static void __init prom_printf(const char *format, ...)
316{
317 const char *p, *q, *s;
318 va_list args;
319 unsigned long v;
320 struct prom_t *_prom = &RELOC(prom);
321
322 va_start(args, format);
323#ifdef CONFIG_PPC64
324 format = PTRRELOC(format);
325#endif
326 for (p = format; *p != 0; p = q) {
327 for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q)
328 ;
329 if (q > p)
330 call_prom("write", 3, 1, _prom->stdout, p, q - p);
331 if (*q == 0)
332 break;
333 if (*q == '\n') {
334 ++q;
335 call_prom("write", 3, 1, _prom->stdout,
336 ADDR("\r\n"), 2);
337 continue;
338 }
339 ++q;
340 if (*q == 0)
341 break;
342 switch (*q) {
343 case 's':
344 ++q;
345 s = va_arg(args, const char *);
346 prom_print(s);
347 break;
348 case 'x':
349 ++q;
350 v = va_arg(args, unsigned long);
351 prom_print_hex(v);
352 break;
353 }
354 }
355}
356
357
a575b807
PM		 358static unsigned int __init prom_claim(unsigned long virt, unsigned long size,
359 unsigned long align)
360{
a575b807
PM		 361 struct prom_t *_prom = &RELOC(prom);
362
a23414be
PM		 363 if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) {
364 /*
365 * Old OF requires we claim physical and virtual separately
366 * and then map explicitly (assuming virtual mode)
367 */
368 int ret;
369 prom_arg_t result;
370
371 ret = call_prom_ret("call-method", 5, 2, &result,
372 ADDR("claim"), _prom->memory,
373 align, size, virt);
374 if (ret != 0 || result == -1)
375 return -1;
376 ret = call_prom_ret("call-method", 5, 2, &result,
377 ADDR("claim"), _prom->mmumap,
378 align, size, virt);
379 if (ret != 0) {
380 call_prom("call-method", 4, 1, ADDR("release"),
381 _prom->memory, size, virt);
382 return -1;
383 }
384 /* the 0x12 is M (coherence) + PP == read/write */
a575b807 385 call_prom("call-method", 6, 1,
a23414be
PM		 386 ADDR("map"), _prom->mmumap, 0x12, size, virt, virt);
387 return virt;
388 }
389 return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size,
390 (prom_arg_t)align);
a575b807
PM		 391}
392
9b6b563c
PM		 393static void __init __attribute__((noreturn)) prom_panic(const char *reason)
394{
395#ifdef CONFIG_PPC64
396 reason = PTRRELOC(reason);
397#endif
398 prom_print(reason);
add60ef3
OH		 399 /* Do not call exit because it clears the screen on pmac
400 * it also causes some sort of double-fault on early pmacs */
401 if (RELOC(of_platform) == PLATFORM_POWERMAC)
402 asm("trap\n");
403
9b6b563c
PM		 404 /* ToDo: should put up an SRC here on p/iSeries */
405 call_prom("exit", 0, 0);
406
407 for (;;) /* should never get here */
408 ;
409}
410
411
412static int __init prom_next_node(phandle *nodep)
413{
414 phandle node;
415
416 if ((node = *nodep) != 0
417 && (*nodep = call_prom("child", 1, 1, node)) != 0)
418 return 1;
419 if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
420 return 1;
421 for (;;) {
422 if ((node = call_prom("parent", 1, 1, node)) == 0)
423 return 0;
424 if ((*nodep = call_prom("peer", 1, 1, node)) != 0)
425 return 1;
426 }
427}
428
21fe3301 429static int inline prom_getprop(phandle node, const char *pname,
9b6b563c
PM		 430 void *value, size_t valuelen)
431{
432 return call_prom("getprop", 4, 1, node, ADDR(pname),
433 (u32)(unsigned long) value, (u32) valuelen);
434}
435
21fe3301 436static int inline prom_getproplen(phandle node, const char *pname)
9b6b563c
PM		 437{
438 return call_prom("getproplen", 2, 1, node, ADDR(pname));
439}
440
a23414be 441static void add_string(char **str, const char *q)
9b6b563c 442{
a23414be
PM		 443 char *p = *str;
444
445 while (*q)
446 *p++ = *q++;
447 *p++ = ' ';
448 *str = p;
449}
450
451static char *tohex(unsigned int x)
452{
453 static char digits[] = "0123456789abcdef";
454 static char result[9];
455 int i;
456
457 result[8] = 0;
458 i = 8;
459 do {
460 --i;
461 result[i] = digits[x & 0xf];
462 x >>= 4;
463 } while (x != 0 && i > 0);
464 return &result[i];
465}
466
467static int __init prom_setprop(phandle node, const char *nodename,
468 const char *pname, void *value, size_t valuelen)
469{
470 char cmd[256], *p;
471
472 if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL))
473 return call_prom("setprop", 4, 1, node, ADDR(pname),
474 (u32)(unsigned long) value, (u32) valuelen);
475
476 /* gah... setprop doesn't work on longtrail, have to use interpret */
477 p = cmd;
478 add_string(&p, "dev");
479 add_string(&p, nodename);
480 add_string(&p, tohex((u32)(unsigned long) value));
481 add_string(&p, tohex(valuelen));
482 add_string(&p, tohex(ADDR(pname)));
483 add_string(&p, tohex(strlen(RELOC(pname))));
484 add_string(&p, "property");
485 *p = 0;
486 return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd);
9b6b563c
PM		 487}
488
cf68787b
BK		 489/* We can't use the standard versions because of RELOC headaches. */
490#define isxdigit(c) (('0' <= (c) && (c) <= '9') \
491 || ('a' <= (c) && (c) <= 'f') \
492 || ('A' <= (c) && (c) <= 'F'))
493
494#define isdigit(c) ('0' <= (c) && (c) <= '9')
495#define islower(c) ('a' <= (c) && (c) <= 'z')
496#define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c))
497
498unsigned long prom_strtoul(const char *cp, const char **endp)
499{
500 unsigned long result = 0, base = 10, value;
501
502 if (*cp == '0') {
503 base = 8;
504 cp++;
505 if (toupper(*cp) == 'X') {
506 cp++;
507 base = 16;
508 }
509 }
510
511 while (isxdigit(*cp) &&
512 (value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) {
513 result = result * base + value;
514 cp++;
515 }
516
517 if (endp)
518 *endp = cp;
519
520 return result;
521}
522
523unsigned long prom_memparse(const char *ptr, const char **retptr)
524{
525 unsigned long ret = prom_strtoul(ptr, retptr);
526 int shift = 0;
527
528 /*
529 * We can't use a switch here because GCC *may* generate a
530 * jump table which won't work, because we're not running at
531 * the address we're linked at.
532 */
533 if ('G' == **retptr || 'g' == **retptr)
534 shift = 30;
535
536 if ('M' == **retptr || 'm' == **retptr)
537 shift = 20;
538
539 if ('K' == **retptr || 'k' == **retptr)
540 shift = 10;
541
542 if (shift) {
543 ret <<= shift;
544 (*retptr)++;
545 }
546
547 return ret;
548}
549
9b6b563c
PM		 550/*
551 * Early parsing of the command line passed to the kernel, used for
552 * "mem=x" and the options that affect the iommu
553 */
554static void __init early_cmdline_parse(void)
555{
556 struct prom_t *_prom = &RELOC(prom);
cc5d0189 557 const char *opt;
cf68787b 558
cc5d0189 559 char *p;
9b6b563c
PM		 560 int l = 0;
561
562 RELOC(prom_cmd_line[0]) = 0;
563 p = RELOC(prom_cmd_line);
564 if ((long)_prom->chosen > 0)
565 l = prom_getprop(_prom->chosen, "bootargs", p, COMMAND_LINE_SIZE-1);
566#ifdef CONFIG_CMDLINE
0e4aa9c2 567 if (l <= 0 || p[0] == '\0') /* dbl check */
9b6b563c
PM		 568 strlcpy(RELOC(prom_cmd_line),
569 RELOC(CONFIG_CMDLINE), sizeof(prom_cmd_line));
570#endif /* CONFIG_CMDLINE */
571 prom_printf("command line: %s\n", RELOC(prom_cmd_line));
572
573#ifdef CONFIG_PPC64
574 opt = strstr(RELOC(prom_cmd_line), RELOC("iommu="));
575 if (opt) {
576 prom_printf("iommu opt is: %s\n", opt);
577 opt += 6;
578 while (*opt && *opt == ' ')
579 opt++;
580 if (!strncmp(opt, RELOC("off"), 3))
165785e5 581 RELOC(prom_iommu_off) = 1;
9b6b563c 582 else if (!strncmp(opt, RELOC("force"), 5))
165785e5 583 RELOC(prom_iommu_force_on) = 1;
9b6b563c
PM		 584 }
585#endif
cf68787b
BK		 586 opt = strstr(RELOC(prom_cmd_line), RELOC("mem="));
587 if (opt) {
588 opt += 4;
589 RELOC(prom_memory_limit) = prom_memparse(opt, (const char **)&opt);
590#ifdef CONFIG_PPC64
591 /* Align to 16 MB == size of ppc64 large page */
592 RELOC(prom_memory_limit) = ALIGN(RELOC(prom_memory_limit), 0x1000000);
593#endif
594 }
9b6b563c
PM		 595}
596
597#ifdef CONFIG_PPC_PSERIES
598/*
f709bfac
PM		 599 * There are two methods for telling firmware what our capabilities are.
600 * Newer machines have an "ibm,client-architecture-support" method on the
601 * root node. For older machines, we have to call the "process-elf-header"
602 * method in the /packages/elf-loader node, passing it a fake 32-bit
603 * ELF header containing a couple of PT_NOTE sections that contain
604 * structures that contain various information.
9b6b563c 605 */
f709bfac
PM		 606
607/*
608 * New method - extensible architecture description vector.
609 *
610 * Because the description vector contains a mix of byte and word
611 * values, we declare it as an unsigned char array, and use this
612 * macro to put word values in.
613 */
614#define W(x) ((x) >> 24) & 0xff, ((x) >> 16) & 0xff, \
615 ((x) >> 8) & 0xff, (x) & 0xff
616
617/* Option vector bits - generic bits in byte 1 */
618#define OV_IGNORE 0x80 /* ignore this vector */
619#define OV_CESSATION_POLICY 0x40 /* halt if unsupported option present*/
620
621/* Option vector 1: processor architectures supported */
622#define OV1_PPC_2_00 0x80 /* set if we support PowerPC 2.00 */
623#define OV1_PPC_2_01 0x40 /* set if we support PowerPC 2.01 */
624#define OV1_PPC_2_02 0x20 /* set if we support PowerPC 2.02 */
625#define OV1_PPC_2_03 0x10 /* set if we support PowerPC 2.03 */
626#define OV1_PPC_2_04 0x08 /* set if we support PowerPC 2.04 */
627#define OV1_PPC_2_05 0x04 /* set if we support PowerPC 2.05 */
0cb99013 628#define OV1_PPC_2_06 0x02 /* set if we support PowerPC 2.06 */
f709bfac
PM		 629
630/* Option vector 2: Open Firmware options supported */
631#define OV2_REAL_MODE 0x20 /* set if we want OF in real mode */
632
633/* Option vector 3: processor options supported */
634#define OV3_FP 0x80 /* floating point */
635#define OV3_VMX 0x40 /* VMX/Altivec */
974a76f5 636#define OV3_DFP 0x20 /* decimal FP */
f709bfac
PM		 637
638/* Option vector 5: PAPR/OF options supported */
639#define OV5_LPAR 0x80 /* logical partitioning supported */
640#define OV5_SPLPAR 0x40 /* shared-processor LPAR supported */
641/* ibm,dynamic-reconfiguration-memory property supported */
642#define OV5_DRCONF_MEMORY 0x20
643#define OV5_LARGE_PAGES 0x10 /* large pages supported */
d8c391a5 644#define OV5_DONATE_DEDICATE_CPU 0x02 /* donate dedicated CPU support */
014dad90
ME		 645/* PCIe/MSI support. Without MSI full PCIe is not supported */
646#ifdef CONFIG_PCI_MSI
647#define OV5_MSI 0x01 /* PCIe/MSI support */
648#else
649#define OV5_MSI 0x00
650#endif /* CONFIG_PCI_MSI */
8391e42a
NF		 651#ifdef CONFIG_PPC_SMLPAR
652#define OV5_CMO 0x80 /* Cooperative Memory Overcommitment */
653#else
654#define OV5_CMO 0x00
655#endif
f709bfac
PM		 656
657/*
658 * The architecture vector has an array of PVR mask/value pairs,
659 * followed by # option vectors - 1, followed by the option vectors.
660 */
661static unsigned char ibm_architecture_vec[] = {
662 W(0xfffe0000), W(0x003a0000), /* POWER5/POWER5+ */
03054d51 663 W(0xffff0000), W(0x003e0000), /* POWER6 */
e952e6c4 664 W(0xffff0000), W(0x003f0000), /* POWER7 */
0cb99013 665 W(0xffffffff), W(0x0f000003), /* all 2.06-compliant */
0efbc18a 666 W(0xffffffff), W(0x0f000002), /* all 2.05-compliant */
f709bfac
PM		 667 W(0xfffffffe), W(0x0f000001), /* all 2.04-compliant and earlier */
668 5 - 1, /* 5 option vectors */
669
670 /* option vector 1: processor architectures supported */
11e9ed43 671 3 - 2, /* length */
f709bfac
PM		 672 0, /* don't ignore, don't halt */
673 OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 |
0cb99013 674 OV1_PPC_2_04 | OV1_PPC_2_05 | OV1_PPC_2_06,
f709bfac
PM		 675
676 /* option vector 2: Open Firmware options supported */
11e9ed43 677 34 - 2, /* length */
f709bfac
PM		 678 OV2_REAL_MODE,
679 0, 0,
680 W(0xffffffff), /* real_base */
681 W(0xffffffff), /* real_size */
682 W(0xffffffff), /* virt_base */
683 W(0xffffffff), /* virt_size */
684 W(0xffffffff), /* load_base */
856cc2f0 685 W(64), /* 64MB min RMA */
f709bfac
PM		 686 W(0xffffffff), /* full client load */
687 0, /* min RMA percentage of total RAM */
688 48, /* max log_2(hash table size) */
689
690 /* option vector 3: processor options supported */
11e9ed43 691 3 - 2, /* length */
f709bfac 692 0, /* don't ignore, don't halt */
974a76f5 693 OV3_FP | OV3_VMX | OV3_DFP,
f709bfac
PM		 694
695 /* option vector 4: IBM PAPR implementation */
11e9ed43 696 2 - 2, /* length */
f709bfac
PM		 697 0, /* don't halt */
698
699 /* option vector 5: PAPR/OF options */
8391e42a 700 5 - 2, /* length */
f709bfac 701 0, /* don't ignore, don't halt */
d8c391a5
JM		 702 OV5_LPAR | OV5_SPLPAR | OV5_LARGE_PAGES | OV5_DRCONF_MEMORY |
703 OV5_DONATE_DEDICATE_CPU | OV5_MSI,
8391e42a
NF		 704 0,
705 OV5_CMO,
f709bfac
PM		 706};
707
708/* Old method - ELF header with PT_NOTE sections */
9b6b563c
PM		 709static struct fake_elf {
710 Elf32_Ehdr elfhdr;
711 Elf32_Phdr phdr[2];
712 struct chrpnote {
713 u32 namesz;
714 u32 descsz;
715 u32 type;
716 char name[8]; /* "PowerPC" */
717 struct chrpdesc {
718 u32 real_mode;
719 u32 real_base;
720 u32 real_size;
721 u32 virt_base;
722 u32 virt_size;
723 u32 load_base;
724 } chrpdesc;
725 } chrpnote;
726 struct rpanote {
727 u32 namesz;
728 u32 descsz;
729 u32 type;
730 char name[24]; /* "IBM,RPA-Client-Config" */
731 struct rpadesc {
732 u32 lpar_affinity;
733 u32 min_rmo_size;
734 u32 min_rmo_percent;
735 u32 max_pft_size;
736 u32 splpar;
737 u32 min_load;
738 u32 new_mem_def;
739 u32 ignore_me;
740 } rpadesc;
741 } rpanote;
5663a123 742} fake_elf = {
9b6b563c
PM		 743 .elfhdr = {
744 .e_ident = { 0x7f, 'E', 'L', 'F',
745 ELFCLASS32, ELFDATA2MSB, EV_CURRENT },
746 .e_type = ET_EXEC, /* yeah right */
747 .e_machine = EM_PPC,
748 .e_version = EV_CURRENT,
749 .e_phoff = offsetof(struct fake_elf, phdr),
750 .e_phentsize = sizeof(Elf32_Phdr),
751 .e_phnum = 2
752 },
753 .phdr = {
754 [0] = {
755 .p_type = PT_NOTE,
756 .p_offset = offsetof(struct fake_elf, chrpnote),
757 .p_filesz = sizeof(struct chrpnote)
758 }, [1] = {
759 .p_type = PT_NOTE,
760 .p_offset = offsetof(struct fake_elf, rpanote),
761 .p_filesz = sizeof(struct rpanote)
762 }
763 },
764 .chrpnote = {
765 .namesz = sizeof("PowerPC"),
766 .descsz = sizeof(struct chrpdesc),
767 .type = 0x1275,
768 .name = "PowerPC",
769 .chrpdesc = {
770 .real_mode = ~0U, /* ~0 means "don't care" */
771 .real_base = ~0U,
772 .real_size = ~0U,
773 .virt_base = ~0U,
774 .virt_size = ~0U,
775 .load_base = ~0U
776 },
777 },
778 .rpanote = {
779 .namesz = sizeof("IBM,RPA-Client-Config"),
780 .descsz = sizeof(struct rpadesc),
781 .type = 0x12759999,
782 .name = "IBM,RPA-Client-Config",
783 .rpadesc = {
5663a123
PM		 784 .lpar_affinity = 0,
785 .min_rmo_size = 64, /* in megabytes */
9b6b563c 786 .min_rmo_percent = 0,
5663a123 787 .max_pft_size = 48, /* 2^48 bytes max PFT size */
9b6b563c
PM		 788 .splpar = 1,
789 .min_load = ~0U,
5663a123 790 .new_mem_def = 0
9b6b563c
PM		 791 }
792 }
793};
794
795static void __init prom_send_capabilities(void)
796{
f709bfac
PM		 797 ihandle elfloader, root;
798 prom_arg_t ret;
799
800 root = call_prom("open", 1, 1, ADDR("/"));
801 if (root != 0) {
802 /* try calling the ibm,client-architecture-support method */
049d0497 803 prom_printf("Calling ibm,client-architecture-support...");
f709bfac
PM		 804 if (call_prom_ret("call-method", 3, 2, &ret,
805 ADDR("ibm,client-architecture-support"),
33b74977 806 root,
f709bfac
PM		 807 ADDR(ibm_architecture_vec)) == 0) {
808 /* the call exists... */
809 if (ret)
4da727ae 810 prom_printf("\nWARNING: ibm,client-architecture"
f709bfac
PM		 811 "-support call FAILED!\n");
812 call_prom("close", 1, 0, root);
4da727ae 813 prom_printf(" done\n");
f709bfac
PM		 814 return;
815 }
816 call_prom("close", 1, 0, root);
049d0497 817 prom_printf(" not implemented\n");
f709bfac 818 }
9b6b563c 819
f709bfac 820 /* no ibm,client-architecture-support call, try the old way */
9b6b563c
PM		 821 elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader"));
822 if (elfloader == 0) {
823 prom_printf("couldn't open /packages/elf-loader\n");
824 return;
825 }
826 call_prom("call-method", 3, 1, ADDR("process-elf-header"),
827 elfloader, ADDR(&fake_elf));
828 call_prom("close", 1, 0, elfloader);
829}
830#endif
831
832/*
833 * Memory allocation strategy... our layout is normally:
834 *
835 * at 14Mb or more we have vmlinux, then a gap and initrd. In some
836 * rare cases, initrd might end up being before the kernel though.
837 * We assume this won't override the final kernel at 0, we have no
838 * provision to handle that in this version, but it should hopefully
839 * never happen.
840 *
841 * alloc_top is set to the top of RMO, eventually shrink down if the
842 * TCEs overlap
843 *
844 * alloc_bottom is set to the top of kernel/initrd
845 *
846 * from there, allocations are done this way : rtas is allocated
847 * topmost, and the device-tree is allocated from the bottom. We try
848 * to grow the device-tree allocation as we progress. If we can't,
849 * then we fail, we don't currently have a facility to restart
850 * elsewhere, but that shouldn't be necessary.
851 *
852 * Note that calls to reserve_mem have to be done explicitly, memory
853 * allocated with either alloc_up or alloc_down isn't automatically
854 * reserved.
855 */
856
857
858/*
859 * Allocates memory in the RMO upward from the kernel/initrd
860 *
861 * When align is 0, this is a special case, it means to allocate in place
862 * at the current location of alloc_bottom or fail (that is basically
863 * extending the previous allocation). Used for the device-tree flattening
864 */
865static unsigned long __init alloc_up(unsigned long size, unsigned long align)
866{
c4988820 867 unsigned long base = RELOC(alloc_bottom);
9b6b563c
PM		 868 unsigned long addr = 0;
869
c4988820
PM		 870 if (align)
871 base = _ALIGN_UP(base, align);
9b6b563c
PM		 872 prom_debug("alloc_up(%x, %x)\n", size, align);
873 if (RELOC(ram_top) == 0)
874 prom_panic("alloc_up() called with mem not initialized\n");
875
876 if (align)
877 base = _ALIGN_UP(RELOC(alloc_bottom), align);
878 else
879 base = RELOC(alloc_bottom);
880
881 for(; (base + size) <= RELOC(alloc_top);
882 base = _ALIGN_UP(base + 0x100000, align)) {
883 prom_debug(" trying: 0x%x\n\r", base);
884 addr = (unsigned long)prom_claim(base, size, 0);
c4988820 885 if (addr != PROM_ERROR && addr != 0)
9b6b563c
PM		 886 break;
887 addr = 0;
888 if (align == 0)
889 break;
890 }
891 if (addr == 0)
892 return 0;
893 RELOC(alloc_bottom) = addr;
894
895 prom_debug(" -> %x\n", addr);
896 prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom));
897 prom_debug(" alloc_top : %x\n", RELOC(alloc_top));
898 prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high));
899 prom_debug(" rmo_top : %x\n", RELOC(rmo_top));
900 prom_debug(" ram_top : %x\n", RELOC(ram_top));
901
902 return addr;
903}
904
905/*
906 * Allocates memory downward, either from top of RMO, or if highmem
907 * is set, from the top of RAM. Note that this one doesn't handle
908 * failures. It does claim memory if highmem is not set.
909 */
910static unsigned long __init alloc_down(unsigned long size, unsigned long align,
911 int highmem)
912{
913 unsigned long base, addr = 0;
914
915 prom_debug("alloc_down(%x, %x, %s)\n", size, align,
916 highmem ? RELOC("(high)") : RELOC("(low)"));
917 if (RELOC(ram_top) == 0)
918 prom_panic("alloc_down() called with mem not initialized\n");
919
920 if (highmem) {
921 /* Carve out storage for the TCE table. */
922 addr = _ALIGN_DOWN(RELOC(alloc_top_high) - size, align);
923 if (addr <= RELOC(alloc_bottom))
924 return 0;
925 /* Will we bump into the RMO ? If yes, check out that we
926 * didn't overlap existing allocations there, if we did,
927 * we are dead, we must be the first in town !
928 */
929 if (addr < RELOC(rmo_top)) {
930 /* Good, we are first */
931 if (RELOC(alloc_top) == RELOC(rmo_top))
932 RELOC(alloc_top) = RELOC(rmo_top) = addr;
933 else
934 return 0;
935 }
936 RELOC(alloc_top_high) = addr;
937 goto bail;
938 }
939
940 base = _ALIGN_DOWN(RELOC(alloc_top) - size, align);
941 for (; base > RELOC(alloc_bottom);
942 base = _ALIGN_DOWN(base - 0x100000, align)) {
943 prom_debug(" trying: 0x%x\n\r", base);
944 addr = (unsigned long)prom_claim(base, size, 0);
c4988820 945 if (addr != PROM_ERROR && addr != 0)
9b6b563c
PM		 946 break;
947 addr = 0;
948 }
949 if (addr == 0)
950 return 0;
951 RELOC(alloc_top) = addr;
952
953 bail:
954 prom_debug(" -> %x\n", addr);
955 prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom));
956 prom_debug(" alloc_top : %x\n", RELOC(alloc_top));
957 prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high));
958 prom_debug(" rmo_top : %x\n", RELOC(rmo_top));
959 prom_debug(" ram_top : %x\n", RELOC(ram_top));
960
961 return addr;
962}
963
964/*
965 * Parse a "reg" cell
966 */
967static unsigned long __init prom_next_cell(int s, cell_t **cellp)
968{
969 cell_t *p = *cellp;
970 unsigned long r = 0;
971
972 /* Ignore more than 2 cells */
973 while (s > sizeof(unsigned long) / 4) {
974 p++;
975 s--;
976 }
977 r = *p++;
978#ifdef CONFIG_PPC64
35499c01 979 if (s > 1) {
9b6b563c
PM		 980 r <<= 32;
981 r |= *(p++);
982 }
983#endif
984 *cellp = p;
985 return r;
986}
987
988/*
989 * Very dumb function for adding to the memory reserve list, but
990 * we don't need anything smarter at this point
991 *
992 * XXX Eventually check for collisions. They should NEVER happen.
993 * If problems seem to show up, it would be a good start to track
994 * them down.
995 */
0108d3fe 996static void __init reserve_mem(u64 base, u64 size)
9b6b563c 997{
cbbcf340 998 u64 top = base + size;
9b6b563c
PM		 999 unsigned long cnt = RELOC(mem_reserve_cnt);
1000
1001 if (size == 0)
1002 return;
1003
1004 /* We need to always keep one empty entry so that we
1005 * have our terminator with "size" set to 0 since we are
1006 * dumb and just copy this entire array to the boot params
1007 */
1008 base = _ALIGN_DOWN(base, PAGE_SIZE);
1009 top = _ALIGN_UP(top, PAGE_SIZE);
1010 size = top - base;
1011
1012 if (cnt >= (MEM_RESERVE_MAP_SIZE - 1))
1013 prom_panic("Memory reserve map exhausted !\n");
1014 RELOC(mem_reserve_map)[cnt].base = base;
1015 RELOC(mem_reserve_map)[cnt].size = size;
1016 RELOC(mem_reserve_cnt) = cnt + 1;
1017}
1018
1019/*
b3c2ffd5 1020 * Initialize memory allocation mechanism, parse "memory" nodes and
9b6b563c
PM		 1021 * obtain that way the top of memory and RMO to setup out local allocator
1022 */
1023static void __init prom_init_mem(void)
1024{
1025 phandle node;
1026 char *path, type[64];
1027 unsigned int plen;
1028 cell_t *p, *endp;
1029 struct prom_t *_prom = &RELOC(prom);
1030 u32 rac, rsc;
1031
1032 /*
1033 * We iterate the memory nodes to find
1034 * 1) top of RMO (first node)
1035 * 2) top of memory
1036 */
1037 rac = 2;
1038 prom_getprop(_prom->root, "#address-cells", &rac, sizeof(rac));
1039 rsc = 1;
1040 prom_getprop(_prom->root, "#size-cells", &rsc, sizeof(rsc));
1041 prom_debug("root_addr_cells: %x\n", (unsigned long) rac);
1042 prom_debug("root_size_cells: %x\n", (unsigned long) rsc);
1043
1044 prom_debug("scanning memory:\n");
1045 path = RELOC(prom_scratch);
1046
1047 for (node = 0; prom_next_node(&node); ) {
1048 type[0] = 0;
1049 prom_getprop(node, "device_type", type, sizeof(type));
1050
c4988820
PM		 1051 if (type[0] == 0) {
1052 /*
1053 * CHRP Longtrail machines have no device_type
1054 * on the memory node, so check the name instead...
1055 */
1056 prom_getprop(node, "name", type, sizeof(type));
1057 }
9b6b563c
PM		 1058 if (strcmp(type, RELOC("memory")))
1059 continue;
c4988820 1060
9b6b563c
PM		 1061 plen = prom_getprop(node, "reg", RELOC(regbuf), sizeof(regbuf));
1062 if (plen > sizeof(regbuf)) {
1063 prom_printf("memory node too large for buffer !\n");
1064 plen = sizeof(regbuf);
1065 }
1066 p = RELOC(regbuf);
1067 endp = p + (plen / sizeof(cell_t));
1068
1069#ifdef DEBUG_PROM
1070 memset(path, 0, PROM_SCRATCH_SIZE);
1071 call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1);
1072 prom_debug(" node %s :\n", path);
1073#endif /* DEBUG_PROM */
1074
1075 while ((endp - p) >= (rac + rsc)) {
1076 unsigned long base, size;
1077
1078 base = prom_next_cell(rac, &p);
1079 size = prom_next_cell(rsc, &p);
1080
1081 if (size == 0)
1082 continue;
1083 prom_debug(" %x %x\n", base, size);
ab1b55e2 1084 if (base == 0 && (RELOC(of_platform) & PLATFORM_LPAR))
9b6b563c
PM		 1085 RELOC(rmo_top) = size;
1086 if ((base + size) > RELOC(ram_top))
1087 RELOC(ram_top) = base + size;
1088 }
1089 }
1090
1091 RELOC(alloc_bottom) = PAGE_ALIGN((unsigned long)&RELOC(_end) + 0x4000);
1092
1093 /* Check if we have an initrd after the kernel, if we do move our bottom
1094 * point to after it
1095 */
1096 if (RELOC(prom_initrd_start)) {
1097 if (RELOC(prom_initrd_end) > RELOC(alloc_bottom))
1098 RELOC(alloc_bottom) = PAGE_ALIGN(RELOC(prom_initrd_end));
1099 }
1100
cf68787b
BK		 1101 /*
1102 * If prom_memory_limit is set we reduce the upper limits *except* for
1103 * alloc_top_high. This must be the real top of RAM so we can put
1104 * TCE's up there.
1105 */
1106
1107 RELOC(alloc_top_high) = RELOC(ram_top);
1108
1109 if (RELOC(prom_memory_limit)) {
1110 if (RELOC(prom_memory_limit) <= RELOC(alloc_bottom)) {
1111 prom_printf("Ignoring mem=%x <= alloc_bottom.\n",
1112 RELOC(prom_memory_limit));
1113 RELOC(prom_memory_limit) = 0;
1114 } else if (RELOC(prom_memory_limit) >= RELOC(ram_top)) {
1115 prom_printf("Ignoring mem=%x >= ram_top.\n",
1116 RELOC(prom_memory_limit));
1117 RELOC(prom_memory_limit) = 0;
1118 } else {
1119 RELOC(ram_top) = RELOC(prom_memory_limit);
1120 RELOC(rmo_top) = min(RELOC(rmo_top), RELOC(prom_memory_limit));
1121 }
1122 }
1123
9b6b563c
PM		 1124 /*
1125 * Setup our top alloc point, that is top of RMO or top of
1126 * segment 0 when running non-LPAR.
1127 * Some RS64 machines have buggy firmware where claims up at
1128 * 1GB fail. Cap at 768MB as a workaround.
1129 * Since 768MB is plenty of room, and we need to cap to something
1130 * reasonable on 32-bit, cap at 768MB on all machines.
1131 */
1132 if (!RELOC(rmo_top))
1133 RELOC(rmo_top) = RELOC(ram_top);
1134 RELOC(rmo_top) = min(0x30000000ul, RELOC(rmo_top));
1135 RELOC(alloc_top) = RELOC(rmo_top);
2babf5c2 1136 RELOC(alloc_top_high) = RELOC(ram_top);
9b6b563c
PM		 1137
1138 prom_printf("memory layout at init:\n");
cf68787b 1139 prom_printf(" memory_limit : %x (16 MB aligned)\n", RELOC(prom_memory_limit));
9b6b563c
PM		 1140 prom_printf(" alloc_bottom : %x\n", RELOC(alloc_bottom));
1141 prom_printf(" alloc_top : %x\n", RELOC(alloc_top));
1142 prom_printf(" alloc_top_hi : %x\n", RELOC(alloc_top_high));
1143 prom_printf(" rmo_top : %x\n", RELOC(rmo_top));
1144 prom_printf(" ram_top : %x\n", RELOC(ram_top));
1145}
1146
1147
1148/*
1149 * Allocate room for and instantiate RTAS
1150 */
1151static void __init prom_instantiate_rtas(void)
1152{
1153 phandle rtas_node;
1154 ihandle rtas_inst;
1155 u32 base, entry = 0;
1156 u32 size = 0;
1157
1158 prom_debug("prom_instantiate_rtas: start...\n");
1159
1160 rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
1161 prom_debug("rtas_node: %x\n", rtas_node);
1162 if (!PHANDLE_VALID(rtas_node))
1163 return;
1164
1165 prom_getprop(rtas_node, "rtas-size", &size, sizeof(size));
1166 if (size == 0)
1167 return;
1168
1169 base = alloc_down(size, PAGE_SIZE, 0);
1170 if (base == 0) {
1171 prom_printf("RTAS allocation failed !\n");
1172 return;
1173 }
1174
1175 rtas_inst = call_prom("open", 1, 1, ADDR("/rtas"));
1176 if (!IHANDLE_VALID(rtas_inst)) {
a23414be 1177 prom_printf("opening rtas package failed (%x)\n", rtas_inst);
9b6b563c
PM		 1178 return;
1179 }
1180
1f8737aa 1181 prom_printf("instantiating rtas at 0x%x...", base);
9b6b563c
PM		 1182
1183 if (call_prom_ret("call-method", 3, 2, &entry,
1184 ADDR("instantiate-rtas"),
a23414be 1185 rtas_inst, base) != 0
9b6b563c
PM		 1186 || entry == 0) {
1187 prom_printf(" failed\n");
1188 return;
1189 }
1190 prom_printf(" done\n");
1191
1192 reserve_mem(base, size);
1193
a23414be
PM		 1194 prom_setprop(rtas_node, "/rtas", "linux,rtas-base",
1195 &base, sizeof(base));
1196 prom_setprop(rtas_node, "/rtas", "linux,rtas-entry",
1197 &entry, sizeof(entry));
9b6b563c
PM		 1198
1199 prom_debug("rtas base = 0x%x\n", base);
1200 prom_debug("rtas entry = 0x%x\n", entry);
1201 prom_debug("rtas size = 0x%x\n", (long)size);
1202
1203 prom_debug("prom_instantiate_rtas: end...\n");
1204}
1205
1206#ifdef CONFIG_PPC64
1207/*
1208 * Allocate room for and initialize TCE tables
1209 */
1210static void __init prom_initialize_tce_table(void)
1211{
1212 phandle node;
1213 ihandle phb_node;
1214 char compatible[64], type[64], model[64];
1215 char *path = RELOC(prom_scratch);
1216 u64 base, align;
1217 u32 minalign, minsize;
1218 u64 tce_entry, *tce_entryp;
1219 u64 local_alloc_top, local_alloc_bottom;
1220 u64 i;
1221
165785e5 1222 if (RELOC(prom_iommu_off))
9b6b563c
PM		 1223 return;
1224
1225 prom_debug("starting prom_initialize_tce_table\n");
1226
1227 /* Cache current top of allocs so we reserve a single block */
1228 local_alloc_top = RELOC(alloc_top_high);
1229 local_alloc_bottom = local_alloc_top;
1230
1231 /* Search all nodes looking for PHBs. */
1232 for (node = 0; prom_next_node(&node); ) {
1233 compatible[0] = 0;
1234 type[0] = 0;
1235 model[0] = 0;
1236 prom_getprop(node, "compatible",
1237 compatible, sizeof(compatible));
1238 prom_getprop(node, "device_type", type, sizeof(type));
1239 prom_getprop(node, "model", model, sizeof(model));
1240
1241 if ((type[0] == 0) || (strstr(type, RELOC("pci")) == NULL))
1242 continue;
1243
e788ff13 1244 /* Keep the old logic intact to avoid regression. */
9b6b563c
PM		 1245 if (compatible[0] != 0) {
1246 if ((strstr(compatible, RELOC("python")) == NULL) &&
1247 (strstr(compatible, RELOC("Speedwagon")) == NULL) &&
1248 (strstr(compatible, RELOC("Winnipeg")) == NULL))
1249 continue;
1250 } else if (model[0] != 0) {
1251 if ((strstr(model, RELOC("ython")) == NULL) &&
1252 (strstr(model, RELOC("peedwagon")) == NULL) &&
1253 (strstr(model, RELOC("innipeg")) == NULL))
1254 continue;
1255 }
1256
1257 if (prom_getprop(node, "tce-table-minalign", &minalign,
1258 sizeof(minalign)) == PROM_ERROR)
1259 minalign = 0;
1260 if (prom_getprop(node, "tce-table-minsize", &minsize,
1261 sizeof(minsize)) == PROM_ERROR)
1262 minsize = 4UL << 20;
1263
1264 /*
1265 * Even though we read what OF wants, we just set the table
1266 * size to 4 MB. This is enough to map 2GB of PCI DMA space.
1267 * By doing this, we avoid the pitfalls of trying to DMA to
1268 * MMIO space and the DMA alias hole.
1269 *
1270 * On POWER4, firmware sets the TCE region by assuming
1271 * each TCE table is 8MB. Using this memory for anything
1272 * else will impact performance, so we always allocate 8MB.
1273 * Anton
1274 */
1275 if (__is_processor(PV_POWER4) || __is_processor(PV_POWER4p))
1276 minsize = 8UL << 20;
1277 else
1278 minsize = 4UL << 20;
1279
1280 /* Align to the greater of the align or size */
1281 align = max(minalign, minsize);
1282 base = alloc_down(minsize, align, 1);
1283 if (base == 0)
1284 prom_panic("ERROR, cannot find space for TCE table.\n");
1285 if (base < local_alloc_bottom)
1286 local_alloc_bottom = base;
1287
9b6b563c 1288 /* It seems OF doesn't null-terminate the path :-( */
aca71ef8 1289 memset(path, 0, PROM_SCRATCH_SIZE);
9b6b563c
PM		 1290 /* Call OF to setup the TCE hardware */
1291 if (call_prom("package-to-path", 3, 1, node,
1292 path, PROM_SCRATCH_SIZE-1) == PROM_ERROR) {
1293 prom_printf("package-to-path failed\n");
1294 }
1295
a23414be
PM		 1296 /* Save away the TCE table attributes for later use. */
1297 prom_setprop(node, path, "linux,tce-base", &base, sizeof(base));
1298 prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize));
1299
9b6b563c
PM		 1300 prom_debug("TCE table: %s\n", path);
1301 prom_debug("\tnode = 0x%x\n", node);
1302 prom_debug("\tbase = 0x%x\n", base);
1303 prom_debug("\tsize = 0x%x\n", minsize);
1304
1305 /* Initialize the table to have a one-to-one mapping
1306 * over the allocated size.
1307 */
2b931fb6 1308 tce_entryp = (u64 *)base;
9b6b563c
PM		 1309 for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) {
1310 tce_entry = (i << PAGE_SHIFT);
1311 tce_entry |= 0x3;
1312 *tce_entryp = tce_entry;
1313 }
1314
1315 prom_printf("opening PHB %s", path);
1316 phb_node = call_prom("open", 1, 1, path);
1317 if (phb_node == 0)
1318 prom_printf("... failed\n");
1319 else
1320 prom_printf("... done\n");
1321
1322 call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"),
1323 phb_node, -1, minsize,
1324 (u32) base, (u32) (base >> 32));
1325 call_prom("close", 1, 0, phb_node);
1326 }
1327
1328 reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom);
1329
2babf5c2
ME		 1330 /* These are only really needed if there is a memory limit in
1331 * effect, but we don't know so export them always. */
1332 RELOC(prom_tce_alloc_start) = local_alloc_bottom;
1333 RELOC(prom_tce_alloc_end) = local_alloc_top;
9b6b563c
PM		 1334
1335 /* Flag the first invalid entry */
1336 prom_debug("ending prom_initialize_tce_table\n");
1337}
1338#endif
1339
1340/*
1341 * With CHRP SMP we need to use the OF to start the other processors.
1342 * We can't wait until smp_boot_cpus (the OF is trashed by then)
1343 * so we have to put the processors into a holding pattern controlled
1344 * by the kernel (not OF) before we destroy the OF.
1345 *
1346 * This uses a chunk of low memory, puts some holding pattern
1347 * code there and sends the other processors off to there until
1348 * smp_boot_cpus tells them to do something. The holding pattern
1349 * checks that address until its cpu # is there, when it is that
1350 * cpu jumps to __secondary_start(). smp_boot_cpus() takes care
1351 * of setting those values.
1352 *
1353 * We also use physical address 0x4 here to tell when a cpu
1354 * is in its holding pattern code.
1355 *
1356 * -- Cort
1357 */
bbd0abda
PM		 1358/*
1359 * We want to reference the copy of __secondary_hold_* in the
1360 * 0 - 0x100 address range
1361 */
1362#define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff)
1363
9b6b563c
PM		 1364static void __init prom_hold_cpus(void)
1365{
9b6b563c
PM		 1366 unsigned long i;
1367 unsigned int reg;
1368 phandle node;
1369 char type[64];
bbd0abda 1370 struct prom_t *_prom = &RELOC(prom);
9b6b563c 1371 unsigned long *spinloop
bbd0abda 1372 = (void *) LOW_ADDR(__secondary_hold_spinloop);
9b6b563c 1373 unsigned long *acknowledge
bbd0abda 1374 = (void *) LOW_ADDR(__secondary_hold_acknowledge);
bbd0abda 1375 unsigned long secondary_hold = LOW_ADDR(__secondary_hold);
9b6b563c
PM		 1376
1377 prom_debug("prom_hold_cpus: start...\n");
1378 prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop);
1379 prom_debug(" 1) *spinloop = 0x%x\n", *spinloop);
1380 prom_debug(" 1) acknowledge = 0x%x\n",
1381 (unsigned long)acknowledge);
1382 prom_debug(" 1) *acknowledge = 0x%x\n", *acknowledge);
1383 prom_debug(" 1) secondary_hold = 0x%x\n", secondary_hold);
1384
1385 /* Set the common spinloop variable, so all of the secondary cpus
1386 * will block when they are awakened from their OF spinloop.
1387 * This must occur for both SMP and non SMP kernels, since OF will
1388 * be trashed when we move the kernel.
1389 */
1390 *spinloop = 0;
1391
9b6b563c
PM		 1392 /* look for cpus */
1393 for (node = 0; prom_next_node(&node); ) {
1394 type[0] = 0;
1395 prom_getprop(node, "device_type", type, sizeof(type));
1396 if (strcmp(type, RELOC("cpu")) != 0)
1397 continue;
1398
1399 /* Skip non-configured cpus. */
1400 if (prom_getprop(node, "status", type, sizeof(type)) > 0)
1401 if (strcmp(type, RELOC("okay")) != 0)
1402 continue;
1403
1404 reg = -1;
1405 prom_getprop(node, "reg", &reg, sizeof(reg));
1406
9b6b563c
PM		 1407 prom_debug("cpu hw idx = 0x%x\n", reg);
1408
1409 /* Init the acknowledge var which will be reset by
1410 * the secondary cpu when it awakens from its OF
1411 * spinloop.
1412 */
1413 *acknowledge = (unsigned long)-1;
1414
7d2f6075 1415 if (reg != _prom->cpu) {
9b6b563c 1416 /* Primary Thread of non-boot cpu */
7d2f6075 1417 prom_printf("starting cpu hw idx %x... ", reg);
9b6b563c
PM		 1418 call_prom("start-cpu", 3, 0, node,
1419 secondary_hold, reg);
1420
bbd0abda
PM		 1421 for (i = 0; (i < 100000000) &&
1422 (*acknowledge == ((unsigned long)-1)); i++ )
9b6b563c
PM		 1423 mb();
1424
bbd0abda 1425 if (*acknowledge == reg)
9b6b563c 1426 prom_printf("done\n");
bbd0abda 1427 else
9b6b563c 1428 prom_printf("failed: %x\n", *acknowledge);
9b6b563c
PM		 1429 }
1430#ifdef CONFIG_SMP
1431 else
7d2f6075 1432 prom_printf("boot cpu hw idx %x\n", reg);
9b6b563c 1433#endif /* CONFIG_SMP */
9b6b563c 1434 }
9b6b563c 1435
9b6b563c 1436 prom_debug("prom_hold_cpus: end...\n");
9b6b563c
PM		 1437}
1438
1439
1440static void __init prom_init_client_services(unsigned long pp)
1441{
1442 struct prom_t *_prom = &RELOC(prom);
1443
1444 /* Get a handle to the prom entry point before anything else */
1445 RELOC(prom_entry) = pp;
1446
1447 /* get a handle for the stdout device */
1448 _prom->chosen = call_prom("finddevice", 1, 1, ADDR("/chosen"));
1449 if (!PHANDLE_VALID(_prom->chosen))
1450 prom_panic("cannot find chosen"); /* msg won't be printed :( */
1451
1452 /* get device tree root */
1453 _prom->root = call_prom("finddevice", 1, 1, ADDR("/"));
1454 if (!PHANDLE_VALID(_prom->root))
1455 prom_panic("cannot find device tree root"); /* msg won't be printed :( */
a575b807
PM		 1456
1457 _prom->mmumap = 0;
1458}
1459
1460#ifdef CONFIG_PPC32
1461/*
1462 * For really old powermacs, we need to map things we claim.
1463 * For that, we need the ihandle of the mmu.
a23414be 1464 * Also, on the longtrail, we need to work around other bugs.
a575b807
PM		 1465 */
1466static void __init prom_find_mmu(void)
1467{
1468 struct prom_t *_prom = &RELOC(prom);
1469 phandle oprom;
1470 char version[64];
1471
1472 oprom = call_prom("finddevice", 1, 1, ADDR("/openprom"));
1473 if (!PHANDLE_VALID(oprom))
1474 return;
1475 if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0)
1476 return;
1477 version[sizeof(version) - 1] = 0;
a575b807 1478 /* XXX might need to add other versions here */
a23414be
PM		 1479 if (strcmp(version, "Open Firmware, 1.0.5") == 0)
1480 of_workarounds = OF_WA_CLAIM;
1481 else if (strncmp(version, "FirmWorks,3.", 12) == 0) {
1482 of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL;
1483 call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim");
1484 } else
a575b807 1485 return;
a23414be 1486 _prom->memory = call_prom("open", 1, 1, ADDR("/memory"));
a575b807
PM		 1487 prom_getprop(_prom->chosen, "mmu", &_prom->mmumap,
1488 sizeof(_prom->mmumap));
a23414be
PM		 1489 if (!IHANDLE_VALID(_prom->memory) || !IHANDLE_VALID(_prom->mmumap))
1490 of_workarounds &= ~OF_WA_CLAIM; /* hmmm */
9b6b563c 1491}
a575b807
PM		 1492#else
1493#define prom_find_mmu()
1494#endif
9b6b563c
PM		 1495
1496static void __init prom_init_stdout(void)
1497{
1498 struct prom_t *_prom = &RELOC(prom);
1499 char *path = RELOC(of_stdout_device);
1500 char type[16];
1501 u32 val;
1502
1503 if (prom_getprop(_prom->chosen, "stdout", &val, sizeof(val)) <= 0)
1504 prom_panic("cannot find stdout");
1505
1506 _prom->stdout = val;
1507
1508 /* Get the full OF pathname of the stdout device */
1509 memset(path, 0, 256);
1510 call_prom("instance-to-path", 3, 1, _prom->stdout, path, 255);
1511 val = call_prom("instance-to-package", 1, 1, _prom->stdout);
a23414be
PM		 1512 prom_setprop(_prom->chosen, "/chosen", "linux,stdout-package",
1513 &val, sizeof(val));
9b6b563c 1514 prom_printf("OF stdout device is: %s\n", RELOC(of_stdout_device));
a23414be
PM		 1515 prom_setprop(_prom->chosen, "/chosen", "linux,stdout-path",
1516 path, strlen(path) + 1);
9b6b563c
PM		 1517
1518 /* If it's a display, note it */
1519 memset(type, 0, sizeof(type));
1520 prom_getprop(val, "device_type", type, sizeof(type));
1521 if (strcmp(type, RELOC("display")) == 0)
a23414be 1522 prom_setprop(val, path, "linux,boot-display", NULL, 0);
9b6b563c
PM		 1523}
1524
1525static void __init prom_close_stdin(void)
1526{
1527 struct prom_t *_prom = &RELOC(prom);
1528 ihandle val;
1529
1530 if (prom_getprop(_prom->chosen, "stdin", &val, sizeof(val)) > 0)
1531 call_prom("close", 1, 0, val);
1532}
1533
1534static int __init prom_find_machine_type(void)
1535{
1536 struct prom_t *_prom = &RELOC(prom);
1537 char compat[256];
1538 int len, i = 0;
21fe3301 1539#ifdef CONFIG_PPC64
9b6b563c 1540 phandle rtas;
e8222502 1541 int x;
21fe3301 1542#endif
e8222502
BH		 1543
1544 /* Look for a PowerMac */
9b6b563c
PM		 1545 len = prom_getprop(_prom->root, "compatible",
1546 compat, sizeof(compat)-1);
1547 if (len > 0) {
1548 compat[len] = 0;
1549 while (i < len) {
1550 char *p = &compat[i];
1551 int sl = strlen(p);
1552 if (sl == 0)
1553 break;
1554 if (strstr(p, RELOC("Power Macintosh")) ||
a575b807 1555 strstr(p, RELOC("MacRISC")))
9b6b563c 1556 return PLATFORM_POWERMAC;
133dda1e
AB		 1557#ifdef CONFIG_PPC64
1558 /* We must make sure we don't detect the IBM Cell
1559 * blades as pSeries due to some firmware issues,
1560 * so we do it here.
1561 */
1562 if (strstr(p, RELOC("IBM,CBEA")) ||
1563 strstr(p, RELOC("IBM,CPBW-1.0")))
1564 return PLATFORM_GENERIC;
1565#endif /* CONFIG_PPC64 */
9b6b563c
PM		 1566 i += sl + 1;
1567 }
1568 }
1569#ifdef CONFIG_PPC64
e8222502
BH		 1570 /* If not a mac, try to figure out if it's an IBM pSeries or any other
1571 * PAPR compliant platform. We assume it is if :
1572 * - /device_type is "chrp" (please, do NOT use that for future
1573 * non-IBM designs !
1574 * - it has /rtas
1575 */
6f806cee 1576 len = prom_getprop(_prom->root, "device_type",
e8222502
BH		 1577 compat, sizeof(compat)-1);
1578 if (len <= 0)
1579 return PLATFORM_GENERIC;
cb6b2eb9 1580 if (strcmp(compat, RELOC("chrp")))
e8222502
BH		 1581 return PLATFORM_GENERIC;
1582
9b6b563c
PM		 1583 /* Default to pSeries. We need to know if we are running LPAR */
1584 rtas = call_prom("finddevice", 1, 1, ADDR("/rtas"));
e8222502
BH		 1585 if (!PHANDLE_VALID(rtas))
1586 return PLATFORM_GENERIC;
1587 x = prom_getproplen(rtas, "ibm,hypertas-functions");
1588 if (x != PROM_ERROR) {
4da727ae 1589 prom_debug("Hypertas detected, assuming LPAR !\n");
e8222502 1590 return PLATFORM_PSERIES_LPAR;
9b6b563c
PM		 1591 }
1592 return PLATFORM_PSERIES;
1593#else
e8222502 1594 return PLATFORM_GENERIC;
9b6b563c
PM		 1595#endif
1596}
1597
9b6b563c
PM		 1598static int __init prom_set_color(ihandle ih, int i, int r, int g, int b)
1599{
1600 return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r);
1601}
1602
1603/*
1604 * If we have a display that we don't know how to drive,
1605 * we will want to try to execute OF's open method for it
1606 * later. However, OF will probably fall over if we do that
1607 * we've taken over the MMU.
1608 * So we check whether we will need to open the display,
1609 * and if so, open it now.
1610 */
1611static void __init prom_check_displays(void)
1612{
1613 char type[16], *path;
1614 phandle node;
1615 ihandle ih;
1616 int i;
9b6b563c
PM		 1617
1618 static unsigned char default_colors[] = {
1619 0x00, 0x00, 0x00,
1620 0x00, 0x00, 0xaa,
1621 0x00, 0xaa, 0x00,
1622 0x00, 0xaa, 0xaa,
1623 0xaa, 0x00, 0x00,
1624 0xaa, 0x00, 0xaa,
1625 0xaa, 0xaa, 0x00,
1626 0xaa, 0xaa, 0xaa,
1627 0x55, 0x55, 0x55,
1628 0x55, 0x55, 0xff,
1629 0x55, 0xff, 0x55,
1630 0x55, 0xff, 0xff,
1631 0xff, 0x55, 0x55,
1632 0xff, 0x55, 0xff,
1633 0xff, 0xff, 0x55,
1634 0xff, 0xff, 0xff
1635 };
1636 const unsigned char *clut;
1637
4da727ae 1638 prom_debug("Looking for displays\n");
9b6b563c
PM		 1639 for (node = 0; prom_next_node(&node); ) {
1640 memset(type, 0, sizeof(type));
1641 prom_getprop(node, "device_type", type, sizeof(type));
1642 if (strcmp(type, RELOC("display")) != 0)
1643 continue;
1644
1645 /* It seems OF doesn't null-terminate the path :-( */
1646 path = RELOC(prom_scratch);
1647 memset(path, 0, PROM_SCRATCH_SIZE);
1648
1649 /*
1650 * leave some room at the end of the path for appending extra
1651 * arguments
1652 */
1653 if (call_prom("package-to-path", 3, 1, node, path,
1654 PROM_SCRATCH_SIZE-10) == PROM_ERROR)
1655 continue;
1f8737aa 1656 prom_printf("found display : %s, opening... ", path);
9b6b563c
PM		 1657
1658 ih = call_prom("open", 1, 1, path);
1659 if (ih == 0) {
1660 prom_printf("failed\n");
1661 continue;
1662 }
1663
1664 /* Success */
1665 prom_printf("done\n");
a23414be 1666 prom_setprop(node, path, "linux,opened", NULL, 0);
9b6b563c
PM		 1667
1668 /* Setup a usable color table when the appropriate
1669 * method is available. Should update this to set-colors */
1670 clut = RELOC(default_colors);
1671 for (i = 0; i < 32; i++, clut += 3)
1672 if (prom_set_color(ih, i, clut[0], clut[1],
1673 clut[2]) != 0)
1674 break;
1675
1676#ifdef CONFIG_LOGO_LINUX_CLUT224
1677 clut = PTRRELOC(RELOC(logo_linux_clut224.clut));
1678 for (i = 0; i < RELOC(logo_linux_clut224.clutsize); i++, clut += 3)
1679 if (prom_set_color(ih, i + 32, clut[0], clut[1],
1680 clut[2]) != 0)
1681 break;
1682#endif /* CONFIG_LOGO_LINUX_CLUT224 */
9b6b563c
PM		 1683 }
1684}
1685
1686
1687/* Return (relocated) pointer to this much memory: moves initrd if reqd. */
1688static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end,
1689 unsigned long needed, unsigned long align)
1690{
1691 void *ret;
1692
1693 *mem_start = _ALIGN(*mem_start, align);
1694 while ((*mem_start + needed) > *mem_end) {
1695 unsigned long room, chunk;
1696
1697 prom_debug("Chunk exhausted, claiming more at %x...\n",
1698 RELOC(alloc_bottom));
1699 room = RELOC(alloc_top) - RELOC(alloc_bottom);
1700 if (room > DEVTREE_CHUNK_SIZE)
1701 room = DEVTREE_CHUNK_SIZE;
1702 if (room < PAGE_SIZE)
1703 prom_panic("No memory for flatten_device_tree (no room)");
1704 chunk = alloc_up(room, 0);
1705 if (chunk == 0)
1706 prom_panic("No memory for flatten_device_tree (claim failed)");
1707 *mem_end = RELOC(alloc_top);
1708 }
1709
1710 ret = (void *)*mem_start;
1711 *mem_start += needed;
1712
1713 return ret;
1714}
1715
1716#define dt_push_token(token, mem_start, mem_end) \
1717 do { *((u32 *)make_room(mem_start, mem_end, 4, 4)) = token; } while(0)
1718
1719static unsigned long __init dt_find_string(char *str)
1720{
1721 char *s, *os;
1722
1723 s = os = (char *)RELOC(dt_string_start);
1724 s += 4;
1725 while (s < (char *)RELOC(dt_string_end)) {
1726 if (strcmp(s, str) == 0)
1727 return s - os;
1728 s += strlen(s) + 1;
1729 }
1730 return 0;
1731}
1732
1733/*
1734 * The Open Firmware 1275 specification states properties must be 31 bytes or
1735 * less, however not all firmwares obey this. Make it 64 bytes to be safe.
1736 */
1737#define MAX_PROPERTY_NAME 64
1738
1739static void __init scan_dt_build_strings(phandle node,
1740 unsigned long *mem_start,
1741 unsigned long *mem_end)
1742{
1743 char *prev_name, *namep, *sstart;
1744 unsigned long soff;
1745 phandle child;
1746
1747 sstart = (char *)RELOC(dt_string_start);
1748
1749 /* get and store all property names */
1750 prev_name = RELOC("");
1751 for (;;) {
1752 /* 64 is max len of name including nul. */
1753 namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1);
1754 if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) {
1755 /* No more nodes: unwind alloc */
1756 *mem_start = (unsigned long)namep;
1757 break;
1758 }
1759
1760 /* skip "name" */
1761 if (strcmp(namep, RELOC("name")) == 0) {
1762 *mem_start = (unsigned long)namep;
1763 prev_name = RELOC("name");
1764 continue;
1765 }
1766 /* get/create string entry */
1767 soff = dt_find_string(namep);
1768 if (soff != 0) {
1769 *mem_start = (unsigned long)namep;
1770 namep = sstart + soff;
1771 } else {
1772 /* Trim off some if we can */
1773 *mem_start = (unsigned long)namep + strlen(namep) + 1;
1774 RELOC(dt_string_end) = *mem_start;
1775 }
1776 prev_name = namep;
1777 }
1778
1779 /* do all our children */
1780 child = call_prom("child", 1, 1, node);
1781 while (child != 0) {
1782 scan_dt_build_strings(child, mem_start, mem_end);
1783 child = call_prom("peer", 1, 1, child);
1784 }
1785}
1786
1787static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
1788 unsigned long *mem_end)
1789{
1790 phandle child;
1791 char *namep, *prev_name, *sstart, *p, *ep, *lp, *path;
1792 unsigned long soff;
1793 unsigned char *valp;
1794 static char pname[MAX_PROPERTY_NAME];
c4988820 1795 int l, room;
9b6b563c
PM		 1796
1797 dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end);
1798
1799 /* get the node's full name */
1800 namep = (char *)*mem_start;
c4988820
PM		 1801 room = *mem_end - *mem_start;
1802 if (room > 255)
1803 room = 255;
1804 l = call_prom("package-to-path", 3, 1, node, namep, room);
9b6b563c
PM		 1805 if (l >= 0) {
1806 /* Didn't fit? Get more room. */
c4988820
PM		 1807 if (l >= room) {
1808 if (l >= *mem_end - *mem_start)
1809 namep = make_room(mem_start, mem_end, l+1, 1);
9b6b563c
PM		 1810 call_prom("package-to-path", 3, 1, node, namep, l);
1811 }
1812 namep[l] = '\0';
1813
1814 /* Fixup an Apple bug where they have bogus \0 chars in the
a575b807
PM		 1815 * middle of the path in some properties, and extract
1816 * the unit name (everything after the last '/').
9b6b563c 1817 */
a575b807 1818 for (lp = p = namep, ep = namep + l; p < ep; p++) {
9b6b563c 1819 if (*p == '/')
a575b807
PM		 1820 lp = namep;
1821 else if (*p != 0)
1822 *lp++ = *p;
1823 }
1824 *lp = 0;
1825 *mem_start = _ALIGN((unsigned long)lp + 1, 4);
9b6b563c
PM		 1826 }
1827
1828 /* get it again for debugging */
1829 path = RELOC(prom_scratch);
1830 memset(path, 0, PROM_SCRATCH_SIZE);
1831 call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1);
1832
1833 /* get and store all properties */
1834 prev_name = RELOC("");
1835 sstart = (char *)RELOC(dt_string_start);
1836 for (;;) {
1837 if (call_prom("nextprop", 3, 1, node, prev_name,
1838 RELOC(pname)) != 1)
1839 break;
1840
1841 /* skip "name" */
1842 if (strcmp(RELOC(pname), RELOC("name")) == 0) {
1843 prev_name = RELOC("name");
1844 continue;
1845 }
1846
1847 /* find string offset */
1848 soff = dt_find_string(RELOC(pname));
1849 if (soff == 0) {
1850 prom_printf("WARNING: Can't find string index for"
1851 " <%s>, node %s\n", RELOC(pname), path);
1852 break;
1853 }
1854 prev_name = sstart + soff;
1855
1856 /* get length */
1857 l = call_prom("getproplen", 2, 1, node, RELOC(pname));
1858
1859 /* sanity checks */
1860 if (l == PROM_ERROR)
1861 continue;
1862 if (l > MAX_PROPERTY_LENGTH) {
1863 prom_printf("WARNING: ignoring large property ");
1864 /* It seems OF doesn't null-terminate the path :-( */
1865 prom_printf("[%s] ", path);
1866 prom_printf("%s length 0x%x\n", RELOC(pname), l);
1867 continue;
1868 }
1869
1870 /* push property head */
1871 dt_push_token(OF_DT_PROP, mem_start, mem_end);
1872 dt_push_token(l, mem_start, mem_end);
1873 dt_push_token(soff, mem_start, mem_end);
1874
1875 /* push property content */
1876 valp = make_room(mem_start, mem_end, l, 4);
1877 call_prom("getprop", 4, 1, node, RELOC(pname), valp, l);
1878 *mem_start = _ALIGN(*mem_start, 4);
1879 }
1880
1881 /* Add a "linux,phandle" property. */
1882 soff = dt_find_string(RELOC("linux,phandle"));
1883 if (soff == 0)
1884 prom_printf("WARNING: Can't find string index for"
1885 " <linux-phandle> node %s\n", path);
1886 else {
1887 dt_push_token(OF_DT_PROP, mem_start, mem_end);
1888 dt_push_token(4, mem_start, mem_end);
1889 dt_push_token(soff, mem_start, mem_end);
1890 valp = make_room(mem_start, mem_end, 4, 4);
1891 *(u32 *)valp = node;
1892 }
1893
1894 /* do all our children */
1895 child = call_prom("child", 1, 1, node);
1896 while (child != 0) {
1897 scan_dt_build_struct(child, mem_start, mem_end);
1898 child = call_prom("peer", 1, 1, child);
1899 }
1900
1901 dt_push_token(OF_DT_END_NODE, mem_start, mem_end);
1902}
1903
1904static void __init flatten_device_tree(void)
1905{
1906 phandle root;
1907 unsigned long mem_start, mem_end, room;
1908 struct boot_param_header *hdr;
1909 struct prom_t *_prom = &RELOC(prom);
1910 char *namep;
1911 u64 *rsvmap;
1912
1913 /*
1914 * Check how much room we have between alloc top & bottom (+/- a
1915 * few pages), crop to 4Mb, as this is our "chuck" size
1916 */
1917 room = RELOC(alloc_top) - RELOC(alloc_bottom) - 0x4000;
1918 if (room > DEVTREE_CHUNK_SIZE)
1919 room = DEVTREE_CHUNK_SIZE;
1920 prom_debug("starting device tree allocs at %x\n", RELOC(alloc_bottom));
1921
1922 /* Now try to claim that */
1923 mem_start = (unsigned long)alloc_up(room, PAGE_SIZE);
1924 if (mem_start == 0)
1925 prom_panic("Can't allocate initial device-tree chunk\n");
1926 mem_end = RELOC(alloc_top);
1927
1928 /* Get root of tree */
1929 root = call_prom("peer", 1, 1, (phandle)0);
1930 if (root == (phandle)0)
1931 prom_panic ("couldn't get device tree root\n");
1932
1933 /* Build header and make room for mem rsv map */
1934 mem_start = _ALIGN(mem_start, 4);
1935 hdr = make_room(&mem_start, &mem_end,
1936 sizeof(struct boot_param_header), 4);
1937 RELOC(dt_header_start) = (unsigned long)hdr;
1938 rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8);
1939
1940 /* Start of strings */
1941 mem_start = PAGE_ALIGN(mem_start);
1942 RELOC(dt_string_start) = mem_start;
1943 mem_start += 4; /* hole */
1944
1945 /* Add "linux,phandle" in there, we'll need it */
1946 namep = make_room(&mem_start, &mem_end, 16, 1);
1947 strcpy(namep, RELOC("linux,phandle"));
1948 mem_start = (unsigned long)namep + strlen(namep) + 1;
1949
1950 /* Build string array */
1951 prom_printf("Building dt strings...\n");
1952 scan_dt_build_strings(root, &mem_start, &mem_end);
1953 RELOC(dt_string_end) = mem_start;
1954
1955 /* Build structure */
1956 mem_start = PAGE_ALIGN(mem_start);
1957 RELOC(dt_struct_start) = mem_start;
1958 prom_printf("Building dt structure...\n");
1959 scan_dt_build_struct(root, &mem_start, &mem_end);
1960 dt_push_token(OF_DT_END, &mem_start, &mem_end);
1961 RELOC(dt_struct_end) = PAGE_ALIGN(mem_start);
1962
1963 /* Finish header */
1964 hdr->boot_cpuid_phys = _prom->cpu;
1965 hdr->magic = OF_DT_HEADER;
1966 hdr->totalsize = RELOC(dt_struct_end) - RELOC(dt_header_start);
1967 hdr->off_dt_struct = RELOC(dt_struct_start) - RELOC(dt_header_start);
1968 hdr->off_dt_strings = RELOC(dt_string_start) - RELOC(dt_header_start);
1969 hdr->dt_strings_size = RELOC(dt_string_end) - RELOC(dt_string_start);
1970 hdr->off_mem_rsvmap = ((unsigned long)rsvmap) - RELOC(dt_header_start);
1971 hdr->version = OF_DT_VERSION;
1972 /* Version 16 is not backward compatible */
1973 hdr->last_comp_version = 0x10;
1974
4d1f3f25 1975 /* Copy the reserve map in */
9b6b563c
PM		 1976 memcpy(rsvmap, RELOC(mem_reserve_map), sizeof(mem_reserve_map));
1977
1978#ifdef DEBUG_PROM
1979 {
1980 int i;
1981 prom_printf("reserved memory map:\n");
1982 for (i = 0; i < RELOC(mem_reserve_cnt); i++)
1983 prom_printf(" %x - %x\n",
1984 RELOC(mem_reserve_map)[i].base,
1985 RELOC(mem_reserve_map)[i].size);
1986 }
1987#endif
4d1f3f25
JX		 1988 /* Bump mem_reserve_cnt to cause further reservations to fail
1989 * since it's too late.
1990 */
9b6b563c
PM		 1991 RELOC(mem_reserve_cnt) = MEM_RESERVE_MAP_SIZE;
1992
1993 prom_printf("Device tree strings 0x%x -> 0x%x\n",
1994 RELOC(dt_string_start), RELOC(dt_string_end));
1995 prom_printf("Device tree struct 0x%x -> 0x%x\n",
1996 RELOC(dt_struct_start), RELOC(dt_struct_end));
1997
1998}
1999
54f4ee18
HB		 2000#ifdef CONFIG_PPC_MAPLE
2001/* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property.
2002 * The values are bad, and it doesn't even have the right number of cells. */
2003static void __init fixup_device_tree_maple(void)
9b6b563c 2004{
54f4ee18 2005 phandle isa;
980a6513 2006 u32 rloc = 0x01002000; /* IO space; PCI device = 4 */
54f4ee18 2007 u32 isa_ranges[6];
980a6513
BH		 2008 char *name;
2009
2010 name = "/ht@0/isa@4";
2011 isa = call_prom("finddevice", 1, 1, ADDR(name));
2012 if (!PHANDLE_VALID(isa)) {
2013 name = "/ht@0/isa@6";
2014 isa = call_prom("finddevice", 1, 1, ADDR(name));
2015 rloc = 0x01003000; /* IO space; PCI device = 6 */
2016 }
54f4ee18
HB		 2017 if (!PHANDLE_VALID(isa))
2018 return;
2019
980a6513
BH		 2020 if (prom_getproplen(isa, "ranges") != 12)
2021 return;
54f4ee18
HB		 2022 if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges))
2023 == PROM_ERROR)
2024 return;
2025
2026 if (isa_ranges[0] != 0x1 ||
2027 isa_ranges[1] != 0xf4000000 ||
2028 isa_ranges[2] != 0x00010000)
2029 return;
2030
980a6513 2031 prom_printf("Fixing up bogus ISA range on Maple/Apache...\n");
54f4ee18
HB		 2032
2033 isa_ranges[0] = 0x1;
2034 isa_ranges[1] = 0x0;
980a6513 2035 isa_ranges[2] = rloc;
54f4ee18
HB		 2036 isa_ranges[3] = 0x0;
2037 isa_ranges[4] = 0x0;
2038 isa_ranges[5] = 0x00010000;
980a6513 2039 prom_setprop(isa, name, "ranges",
54f4ee18
HB		 2040 isa_ranges, sizeof(isa_ranges));
2041}
8f101a05
HC		 2042
2043#define CPC925_MC_START 0xf8000000
2044#define CPC925_MC_LENGTH 0x1000000
2045/* The values for memory-controller don't have right number of cells */
2046static void __init fixup_device_tree_maple_memory_controller(void)
2047{
2048 phandle mc;
2049 u32 mc_reg[4];
2050 char *name = "/hostbridge@f8000000";
2051 struct prom_t *_prom = &RELOC(prom);
2052 u32 ac, sc;
2053
2054 mc = call_prom("finddevice", 1, 1, ADDR(name));
2055 if (!PHANDLE_VALID(mc))
2056 return;
2057
2058 if (prom_getproplen(mc, "reg") != 8)
2059 return;
2060
2061 prom_getprop(_prom->root, "#address-cells", &ac, sizeof(ac));
2062 prom_getprop(_prom->root, "#size-cells", &sc, sizeof(sc));
2063 if ((ac != 2) || (sc != 2))
2064 return;
2065
2066 if (prom_getprop(mc, "reg", mc_reg, sizeof(mc_reg)) == PROM_ERROR)
2067 return;
2068
2069 if (mc_reg[0] != CPC925_MC_START || mc_reg[1] != CPC925_MC_LENGTH)
2070 return;
2071
2072 prom_printf("Fixing up bogus hostbridge on Maple...\n");
2073
2074 mc_reg[0] = 0x0;
2075 mc_reg[1] = CPC925_MC_START;
2076 mc_reg[2] = 0x0;
2077 mc_reg[3] = CPC925_MC_LENGTH;
2078 prom_setprop(mc, name, "reg", mc_reg, sizeof(mc_reg));
2079}
54f4ee18
HB		 2080#else
2081#define fixup_device_tree_maple()
8f101a05 2082#define fixup_device_tree_maple_memory_controller()
54f4ee18
HB		 2083#endif
2084
e8c0acf9 2085#ifdef CONFIG_PPC_CHRP
e4805922
OH		 2086/*
2087 * Pegasos and BriQ lacks the "ranges" property in the isa node
2088 * Pegasos needs decimal IRQ 14/15, not hexadecimal
556ecf9b 2089 * Pegasos has the IDE configured in legacy mode, but advertised as native
e4805922 2090 */
e8c0acf9
BH		 2091static void __init fixup_device_tree_chrp(void)
2092{
e4805922
OH		 2093 phandle ph;
2094 u32 prop[6];
26c5032e 2095 u32 rloc = 0x01006000; /* IO space; PCI device = 12 */
e8c0acf9
BH		 2096 char *name;
2097 int rc;
2098
2099 name = "/pci@80000000/isa@c";
e4805922
OH		 2100 ph = call_prom("finddevice", 1, 1, ADDR(name));
2101 if (!PHANDLE_VALID(ph)) {
26c5032e 2102 name = "/pci@ff500000/isa@6";
e4805922 2103 ph = call_prom("finddevice", 1, 1, ADDR(name));
26c5032e
BH		 2104 rloc = 0x01003000; /* IO space; PCI device = 6 */
2105 }
e4805922
OH		 2106 if (PHANDLE_VALID(ph)) {
2107 rc = prom_getproplen(ph, "ranges");
2108 if (rc == 0 || rc == PROM_ERROR) {
2109 prom_printf("Fixing up missing ISA range on Pegasos...\n");
2110
2111 prop[0] = 0x1;
2112 prop[1] = 0x0;
2113 prop[2] = rloc;
2114 prop[3] = 0x0;
2115 prop[4] = 0x0;
2116 prop[5] = 0x00010000;
2117 prom_setprop(ph, name, "ranges", prop, sizeof(prop));
2118 }
2119 }
e8c0acf9 2120
e4805922
OH		 2121 name = "/pci@80000000/ide@C,1";
2122 ph = call_prom("finddevice", 1, 1, ADDR(name));
2123 if (PHANDLE_VALID(ph)) {
2124 prom_printf("Fixing up IDE interrupt on Pegasos...\n");
2125 prop[0] = 14;
2126 prop[1] = 0x0;
556ecf9b
OH		 2127 prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32));
2128 prom_printf("Fixing up IDE class-code on Pegasos...\n");
2129 rc = prom_getprop(ph, "class-code", prop, sizeof(u32));
2130 if (rc == sizeof(u32)) {
2131 prop[0] &= ~0x5;
2132 prom_setprop(ph, name, "class-code", prop, sizeof(u32));
2133 }
e4805922 2134 }
e8c0acf9
BH		 2135}
2136#else
2137#define fixup_device_tree_chrp()
2138#endif
2139
9b6b563c 2140#if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)
54f4ee18
HB		 2141static void __init fixup_device_tree_pmac(void)
2142{
9b6b563c
PM		 2143 phandle u3, i2c, mpic;
2144 u32 u3_rev;
2145 u32 interrupts[2];
2146 u32 parent;
2147
2148 /* Some G5s have a missing interrupt definition, fix it up here */
2149 u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000"));
2150 if (!PHANDLE_VALID(u3))
2151 return;
2152 i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000"));
2153 if (!PHANDLE_VALID(i2c))
2154 return;
2155 mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000"));
2156 if (!PHANDLE_VALID(mpic))
2157 return;
2158
2159 /* check if proper rev of u3 */
2160 if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev))
2161 == PROM_ERROR)
2162 return;
7d49697e 2163 if (u3_rev < 0x35 || u3_rev > 0x39)
9b6b563c
PM		 2164 return;
2165 /* does it need fixup ? */
2166 if (prom_getproplen(i2c, "interrupts") > 0)
2167 return;
2168
2169 prom_printf("fixing up bogus interrupts for u3 i2c...\n");
2170
2171 /* interrupt on this revision of u3 is number 0 and level */
2172 interrupts[0] = 0;
2173 interrupts[1] = 1;
a23414be
PM		 2174 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts",
2175 &interrupts, sizeof(interrupts));
9b6b563c 2176 parent = (u32)mpic;
a23414be
PM		 2177 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent",
2178 &parent, sizeof(parent));
9b6b563c 2179}
54f4ee18
HB		 2180#else
2181#define fixup_device_tree_pmac()
2182#endif
9b6b563c 2183
88fd2a9d 2184#ifdef CONFIG_PPC_EFIKA
94d2dde7
GL		 2185/*
2186 * The MPC5200 FEC driver requires an phy-handle property to tell it how
2187 * to talk to the phy. If the phy-handle property is missing, then this
2188 * function is called to add the appropriate nodes and link it to the
2189 * ethernet node.
2190 */
2191static void __init fixup_device_tree_efika_add_phy(void)
88fd2a9d 2192{
88fd2a9d
SM		 2193 u32 node;
2194 char prop[64];
94d2dde7 2195 int rv;
88fd2a9d 2196
94d2dde7
GL		 2197 /* Check if /builtin/ethernet exists - bail if it doesn't */
2198 node = call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet"));
88fd2a9d
SM		 2199 if (!PHANDLE_VALID(node))
2200 return;
2201
94d2dde7
GL		 2202 /* Check if the phy-handle property exists - bail if it does */
2203 rv = prom_getprop(node, "phy-handle", prop, sizeof(prop));
2204 if (!rv)
88fd2a9d
SM		 2205 return;
2206
94d2dde7
GL		 2207 /*
2208 * At this point the ethernet device doesn't have a phy described.
2209 * Now we need to add the missing phy node and linkage
2210 */
6f4347c9 2211
94d2dde7 2212 /* Check for an MDIO bus node - if missing then create one */
6f4347c9
OH		 2213 node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio"));
2214 if (!PHANDLE_VALID(node)) {
2215 prom_printf("Adding Ethernet MDIO node\n");
2216 call_prom("interpret", 1, 1,
2217 " s\" /builtin\" find-device"
2218 " new-device"
2219 " 1 encode-int s\" #address-cells\" property"
2220 " 0 encode-int s\" #size-cells\" property"
94d2dde7
GL		 2221 " s\" mdio\" device-name"
2222 " s\" fsl,mpc5200b-mdio\" encode-string"
6f4347c9
OH		 2223 " s\" compatible\" property"
2224 " 0xf0003000 0x400 reg"
2225 " 0x2 encode-int"
2226 " 0x5 encode-int encode+"
2227 " 0x3 encode-int encode+"
2228 " s\" interrupts\" property"
2229 " finish-device");
2230 };
2231
94d2dde7
GL		 2232 /* Check for a PHY device node - if missing then create one and
2233 * give it's phandle to the ethernet node */
2234 node = call_prom("finddevice", 1, 1,
2235 ADDR("/builtin/mdio/ethernet-phy"));
6f4347c9
OH		 2236 if (!PHANDLE_VALID(node)) {
2237 prom_printf("Adding Ethernet PHY node\n");
2238 call_prom("interpret", 1, 1,
2239 " s\" /builtin/mdio\" find-device"
2240 " new-device"
2241 " s\" ethernet-phy\" device-name"
2242 " 0x10 encode-int s\" reg\" property"
2243 " my-self"
2244 " ihandle>phandle"
2245 " finish-device"
2246 " s\" /builtin/ethernet\" find-device"
2247 " encode-int"
2248 " s\" phy-handle\" property"
2249 " device-end");
2250 }
94d2dde7
GL		 2251}
2252
2253static void __init fixup_device_tree_efika(void)
2254{
2255 int sound_irq[3] = { 2, 2, 0 };
2256 int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0,
2257 3,4,0, 3,5,0, 3,6,0, 3,7,0,
2258 3,8,0, 3,9,0, 3,10,0, 3,11,0,
2259 3,12,0, 3,13,0, 3,14,0, 3,15,0 };
2260 u32 node;
2261 char prop[64];
2262 int rv, len;
2263
2264 /* Check if we're really running on a EFIKA */
2265 node = call_prom("finddevice", 1, 1, ADDR("/"));
2266 if (!PHANDLE_VALID(node))
2267 return;
2268
2269 rv = prom_getprop(node, "model", prop, sizeof(prop));
2270 if (rv == PROM_ERROR)
2271 return;
2272 if (strcmp(prop, "EFIKA5K2"))
2273 return;
2274
2275 prom_printf("Applying EFIKA device tree fixups\n");
2276
2277 /* Claiming to be 'chrp' is death */
2278 node = call_prom("finddevice", 1, 1, ADDR("/"));
2279 rv = prom_getprop(node, "device_type", prop, sizeof(prop));
2280 if (rv != PROM_ERROR && (strcmp(prop, "chrp") == 0))
2281 prom_setprop(node, "/", "device_type", "efika", sizeof("efika"));
2282
7f4392cd
DW		 2283 /* CODEGEN,description is exposed in /proc/cpuinfo so
2284 fix that too */
2285 rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop));
2286 if (rv != PROM_ERROR && (strstr(prop, "CHRP")))
2287 prom_setprop(node, "/", "CODEGEN,description",
2288 "Efika 5200B PowerPC System",
2289 sizeof("Efika 5200B PowerPC System"));
2290
94d2dde7
GL		 2291 /* Fixup bestcomm interrupts property */
2292 node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm"));
2293 if (PHANDLE_VALID(node)) {
2294 len = prom_getproplen(node, "interrupts");
2295 if (len == 12) {
2296 prom_printf("Fixing bestcomm interrupts property\n");
2297 prom_setprop(node, "/builtin/bestcom", "interrupts",
2298 bcomm_irq, sizeof(bcomm_irq));
2299 }
2300 }
2301
2302 /* Fixup sound interrupts property */
2303 node = call_prom("finddevice", 1, 1, ADDR("/builtin/sound"));
2304 if (PHANDLE_VALID(node)) {
2305 rv = prom_getprop(node, "interrupts", prop, sizeof(prop));
2306 if (rv == PROM_ERROR) {
2307 prom_printf("Adding sound interrupts property\n");
2308 prom_setprop(node, "/builtin/sound", "interrupts",
2309 sound_irq, sizeof(sound_irq));
2310 }
2311 }
6f4347c9 2312
94d2dde7
GL		 2313 /* Make sure ethernet phy-handle property exists */
2314 fixup_device_tree_efika_add_phy();
88fd2a9d
SM		 2315}
2316#else
2317#define fixup_device_tree_efika()
2318#endif
2319
54f4ee18
HB		 2320static void __init fixup_device_tree(void)
2321{
2322 fixup_device_tree_maple();
8f101a05 2323 fixup_device_tree_maple_memory_controller();
e8c0acf9 2324 fixup_device_tree_chrp();
54f4ee18 2325 fixup_device_tree_pmac();
88fd2a9d 2326 fixup_device_tree_efika();
54f4ee18 2327}
9b6b563c
PM		 2328
2329static void __init prom_find_boot_cpu(void)
2330{
e788ff13 2331 struct prom_t *_prom = &RELOC(prom);
9b6b563c
PM		 2332 u32 getprop_rval;
2333 ihandle prom_cpu;
2334 phandle cpu_pkg;
2335
a575b807 2336 _prom->cpu = 0;
9b6b563c 2337 if (prom_getprop(_prom->chosen, "cpu", &prom_cpu, sizeof(prom_cpu)) <= 0)
a575b807 2338 return;
9b6b563c
PM		 2339
2340 cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu);
2341
2342 prom_getprop(cpu_pkg, "reg", &getprop_rval, sizeof(getprop_rval));
2343 _prom->cpu = getprop_rval;
2344
2345 prom_debug("Booting CPU hw index = 0x%x\n", _prom->cpu);
2346}
2347
2348static void __init prom_check_initrd(unsigned long r3, unsigned long r4)
2349{
2350#ifdef CONFIG_BLK_DEV_INITRD
e788ff13 2351 struct prom_t *_prom = &RELOC(prom);
9b6b563c
PM		 2352
2353 if (r3 && r4 && r4 != 0xdeadbeef) {
2354 unsigned long val;
2355
51fae6de 2356 RELOC(prom_initrd_start) = is_kernel_addr(r3) ? __pa(r3) : r3;
9b6b563c
PM		 2357 RELOC(prom_initrd_end) = RELOC(prom_initrd_start) + r4;
2358
2359 val = RELOC(prom_initrd_start);
a23414be
PM		 2360 prom_setprop(_prom->chosen, "/chosen", "linux,initrd-start",
2361 &val, sizeof(val));
9b6b563c 2362 val = RELOC(prom_initrd_end);
a23414be
PM		 2363 prom_setprop(_prom->chosen, "/chosen", "linux,initrd-end",
2364 &val, sizeof(val));
9b6b563c
PM		 2365
2366 reserve_mem(RELOC(prom_initrd_start),
2367 RELOC(prom_initrd_end) - RELOC(prom_initrd_start));
2368
2369 prom_debug("initrd_start=0x%x\n", RELOC(prom_initrd_start));
2370 prom_debug("initrd_end=0x%x\n", RELOC(prom_initrd_end));
2371 }
2372#endif /* CONFIG_BLK_DEV_INITRD */
2373}
2374
2375/*
2376 * We enter here early on, when the Open Firmware prom is still
2377 * handling exceptions and the MMU hash table for us.
2378 */
2379
2380unsigned long __init prom_init(unsigned long r3, unsigned long r4,
2381 unsigned long pp,
549e8152
PM		 2382 unsigned long r6, unsigned long r7,
2383 unsigned long kbase)
9b6b563c 2384{
e788ff13 2385 struct prom_t *_prom;
9b6b563c 2386 unsigned long hdr;
9b6b563c
PM		 2387
2388#ifdef CONFIG_PPC32
549e8152 2389 unsigned long offset = reloc_offset();
9b6b563c
PM		 2390 reloc_got2(offset);
2391#endif
2392
2393 _prom = &RELOC(prom);
2394
2395 /*
2396 * First zero the BSS
2397 */
2398 memset(&RELOC(__bss_start), 0, __bss_stop - __bss_start);
2399
2400 /*
2401 * Init interface to Open Firmware, get some node references,
2402 * like /chosen
2403 */
2404 prom_init_client_services(pp);
2405
2406 /*
a23414be
PM		 2407 * See if this OF is old enough that we need to do explicit maps
2408 * and other workarounds
9b6b563c 2409 */
a23414be 2410 prom_find_mmu();
9b6b563c 2411
a575b807 2412 /*
a23414be 2413 * Init prom stdout device
a575b807 2414 */
a23414be 2415 prom_init_stdout();
a575b807 2416
151a9f4a 2417 prom_printf("Preparing to boot %s", RELOC(linux_banner));
e7943fbb 2418
9b6b563c
PM		 2419 /*
2420 * Get default machine type. At this point, we do not differentiate
2421 * between pSeries SMP and pSeries LPAR
2422 */
2423 RELOC(of_platform) = prom_find_machine_type();
9b6b563c 2424
549e8152 2425#ifndef CONFIG_RELOCATABLE
add60ef3
OH		 2426 /* Bail if this is a kdump kernel. */
2427 if (PHYSICAL_START > 0)
2428 prom_panic("Error: You can't boot a kdump kernel from OF!\n");
549e8152 2429#endif
add60ef3
OH		 2430
2431 /*
2432 * Check for an initrd
2433 */
2434 prom_check_initrd(r3, r4);
2435
9b6b563c
PM		 2436#ifdef CONFIG_PPC_PSERIES
2437 /*
2438 * On pSeries, inform the firmware about our capabilities
2439 */
799d6046
PM		 2440 if (RELOC(of_platform) == PLATFORM_PSERIES ||
2441 RELOC(of_platform) == PLATFORM_PSERIES_LPAR)
9b6b563c
PM		 2442 prom_send_capabilities();
2443#endif
2444
9b6b563c 2445 /*
f3f66f59 2446 * Copy the CPU hold code
9b6b563c 2447 */
e788ff13 2448 if (RELOC(of_platform) != PLATFORM_POWERMAC)
549e8152 2449 copy_and_flush(0, kbase, 0x100, 0);
9b6b563c
PM		 2450
2451 /*
2452 * Do early parsing of command line
2453 */
2454 early_cmdline_parse();
2455
2456 /*
2457 * Initialize memory management within prom_init
2458 */
2459 prom_init_mem();
2460
2461 /*
2462 * Determine which cpu is actually running right _now_
2463 */
2464 prom_find_boot_cpu();
2465
2466 /*
2467 * Initialize display devices
2468 */
2469 prom_check_displays();
2470
2471#ifdef CONFIG_PPC64
2472 /*
2473 * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else
2474 * that uses the allocator, we need to make sure we get the top of memory
2475 * available for us here...
2476 */
2477 if (RELOC(of_platform) == PLATFORM_PSERIES)
2478 prom_initialize_tce_table();
2479#endif
2480
2481 /*
2482 * On non-powermacs, try to instantiate RTAS and puts all CPUs
2483 * in spin-loops. PowerMacs don't have a working RTAS and use
2484 * a different way to spin CPUs
2485 */
2486 if (RELOC(of_platform) != PLATFORM_POWERMAC) {
2487 prom_instantiate_rtas();
2488 prom_hold_cpus();
2489 }
2490
2491 /*
2492 * Fill in some infos for use by the kernel later on
2493 */
cf68787b
BK		 2494 if (RELOC(prom_memory_limit))
2495 prom_setprop(_prom->chosen, "/chosen", "linux,memory-limit",
2496 &RELOC(prom_memory_limit),
2497 sizeof(prom_memory_limit));
9b6b563c 2498#ifdef CONFIG_PPC64
165785e5 2499 if (RELOC(prom_iommu_off))
a23414be
PM		 2500 prom_setprop(_prom->chosen, "/chosen", "linux,iommu-off",
2501 NULL, 0);
9b6b563c 2502
165785e5 2503 if (RELOC(prom_iommu_force_on))
a23414be
PM		 2504 prom_setprop(_prom->chosen, "/chosen", "linux,iommu-force-on",
2505 NULL, 0);
9b6b563c
PM		 2506
2507 if (RELOC(prom_tce_alloc_start)) {
a23414be 2508 prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-start",
9b6b563c
PM		 2509 &RELOC(prom_tce_alloc_start),
2510 sizeof(prom_tce_alloc_start));
a23414be 2511 prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-end",
9b6b563c
PM		 2512 &RELOC(prom_tce_alloc_end),
2513 sizeof(prom_tce_alloc_end));
2514 }
2515#endif
2516
2517 /*
2518 * Fixup any known bugs in the device-tree
2519 */
2520 fixup_device_tree();
2521
2522 /*
2523 * Now finally create the flattened device-tree
2524 */
1f8737aa 2525 prom_printf("copying OF device tree...\n");
9b6b563c
PM		 2526 flatten_device_tree();
2527
3825ac0e
PM		 2528 /*
2529 * in case stdin is USB and still active on IBM machines...
2530 * Unfortunately quiesce crashes on some powermacs if we have
2531 * closed stdin already (in particular the powerbook 101).
2532 */
2533 if (RELOC(of_platform) != PLATFORM_POWERMAC)
2534 prom_close_stdin();
9b6b563c
PM		 2535
2536 /*
2537 * Call OF "quiesce" method to shut down pending DMA's from
2538 * devices etc...
2539 */
1f8737aa 2540 prom_printf("Calling quiesce...\n");
9b6b563c
PM		 2541 call_prom("quiesce", 0, 0);
2542
2543 /*
2544 * And finally, call the kernel passing it the flattened device
2545 * tree and NULL as r5, thus triggering the new entry point which
2546 * is common to us and kexec
2547 */
2548 hdr = RELOC(dt_header_start);
2549 prom_printf("returning from prom_init\n");
2550 prom_debug("->dt_header_start=0x%x\n", hdr);
2551
2552#ifdef CONFIG_PPC32
2553 reloc_got2(-offset);
2554#endif
2555
549e8152 2556 __start(hdr, kbase, 0);
9b6b563c
PM		 2557
2558 return 0;
2559}
Linux kernel - Deliverables
This page took 0.776803 seconds and 5 git commands to generate.