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powerpc: Increase NODES_SHIFT on 64bit from 4 to 8
[GitHub/mt8127/android_kernel_alcatel_ttab.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 */
4da727ae 803 prom_printf("Calling ibm,client-architecture...");
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);
817 }
9b6b563c 818
f709bfac 819 /* no ibm,client-architecture-support call, try the old way */
9b6b563c
PM		 820 elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader"));
821 if (elfloader == 0) {
822 prom_printf("couldn't open /packages/elf-loader\n");
823 return;
824 }
825 call_prom("call-method", 3, 1, ADDR("process-elf-header"),
826 elfloader, ADDR(&fake_elf));
827 call_prom("close", 1, 0, elfloader);
828}
829#endif
830
831/*
832 * Memory allocation strategy... our layout is normally:
833 *
834 * at 14Mb or more we have vmlinux, then a gap and initrd. In some
835 * rare cases, initrd might end up being before the kernel though.
836 * We assume this won't override the final kernel at 0, we have no
837 * provision to handle that in this version, but it should hopefully
838 * never happen.
839 *
840 * alloc_top is set to the top of RMO, eventually shrink down if the
841 * TCEs overlap
842 *
843 * alloc_bottom is set to the top of kernel/initrd
844 *
845 * from there, allocations are done this way : rtas is allocated
846 * topmost, and the device-tree is allocated from the bottom. We try
847 * to grow the device-tree allocation as we progress. If we can't,
848 * then we fail, we don't currently have a facility to restart
849 * elsewhere, but that shouldn't be necessary.
850 *
851 * Note that calls to reserve_mem have to be done explicitly, memory
852 * allocated with either alloc_up or alloc_down isn't automatically
853 * reserved.
854 */
855
856
857/*
858 * Allocates memory in the RMO upward from the kernel/initrd
859 *
860 * When align is 0, this is a special case, it means to allocate in place
861 * at the current location of alloc_bottom or fail (that is basically
862 * extending the previous allocation). Used for the device-tree flattening
863 */
864static unsigned long __init alloc_up(unsigned long size, unsigned long align)
865{
c4988820 866 unsigned long base = RELOC(alloc_bottom);
9b6b563c
PM		 867 unsigned long addr = 0;
868
c4988820
PM		 869 if (align)
870 base = _ALIGN_UP(base, align);
9b6b563c
PM		 871 prom_debug("alloc_up(%x, %x)\n", size, align);
872 if (RELOC(ram_top) == 0)
873 prom_panic("alloc_up() called with mem not initialized\n");
874
875 if (align)
876 base = _ALIGN_UP(RELOC(alloc_bottom), align);
877 else
878 base = RELOC(alloc_bottom);
879
880 for(; (base + size) <= RELOC(alloc_top);
881 base = _ALIGN_UP(base + 0x100000, align)) {
882 prom_debug(" trying: 0x%x\n\r", base);
883 addr = (unsigned long)prom_claim(base, size, 0);
c4988820 884 if (addr != PROM_ERROR && addr != 0)
9b6b563c
PM		 885 break;
886 addr = 0;
887 if (align == 0)
888 break;
889 }
890 if (addr == 0)
891 return 0;
892 RELOC(alloc_bottom) = addr;
893
894 prom_debug(" -> %x\n", addr);
895 prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom));
896 prom_debug(" alloc_top : %x\n", RELOC(alloc_top));
897 prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high));
898 prom_debug(" rmo_top : %x\n", RELOC(rmo_top));
899 prom_debug(" ram_top : %x\n", RELOC(ram_top));
900
901 return addr;
902}
903
904/*
905 * Allocates memory downward, either from top of RMO, or if highmem
906 * is set, from the top of RAM. Note that this one doesn't handle
907 * failures. It does claim memory if highmem is not set.
908 */
909static unsigned long __init alloc_down(unsigned long size, unsigned long align,
910 int highmem)
911{
912 unsigned long base, addr = 0;
913
914 prom_debug("alloc_down(%x, %x, %s)\n", size, align,
915 highmem ? RELOC("(high)") : RELOC("(low)"));
916 if (RELOC(ram_top) == 0)
917 prom_panic("alloc_down() called with mem not initialized\n");
918
919 if (highmem) {
920 /* Carve out storage for the TCE table. */
921 addr = _ALIGN_DOWN(RELOC(alloc_top_high) - size, align);
922 if (addr <= RELOC(alloc_bottom))
923 return 0;
924 /* Will we bump into the RMO ? If yes, check out that we
925 * didn't overlap existing allocations there, if we did,
926 * we are dead, we must be the first in town !
927 */
928 if (addr < RELOC(rmo_top)) {
929 /* Good, we are first */
930 if (RELOC(alloc_top) == RELOC(rmo_top))
931 RELOC(alloc_top) = RELOC(rmo_top) = addr;
932 else
933 return 0;
934 }
935 RELOC(alloc_top_high) = addr;
936 goto bail;
937 }
938
939 base = _ALIGN_DOWN(RELOC(alloc_top) - size, align);
940 for (; base > RELOC(alloc_bottom);
941 base = _ALIGN_DOWN(base - 0x100000, align)) {
942 prom_debug(" trying: 0x%x\n\r", base);
943 addr = (unsigned long)prom_claim(base, size, 0);
c4988820 944 if (addr != PROM_ERROR && addr != 0)
9b6b563c
PM		 945 break;
946 addr = 0;
947 }
948 if (addr == 0)
949 return 0;
950 RELOC(alloc_top) = addr;
951
952 bail:
953 prom_debug(" -> %x\n", addr);
954 prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom));
955 prom_debug(" alloc_top : %x\n", RELOC(alloc_top));
956 prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high));
957 prom_debug(" rmo_top : %x\n", RELOC(rmo_top));
958 prom_debug(" ram_top : %x\n", RELOC(ram_top));
959
960 return addr;
961}
962
963/*
964 * Parse a "reg" cell
965 */
966static unsigned long __init prom_next_cell(int s, cell_t **cellp)
967{
968 cell_t *p = *cellp;
969 unsigned long r = 0;
970
971 /* Ignore more than 2 cells */
972 while (s > sizeof(unsigned long) / 4) {
973 p++;
974 s--;
975 }
976 r = *p++;
977#ifdef CONFIG_PPC64
35499c01 978 if (s > 1) {
9b6b563c
PM		 979 r <<= 32;
980 r |= *(p++);
981 }
982#endif
983 *cellp = p;
984 return r;
985}
986
987/*
988 * Very dumb function for adding to the memory reserve list, but
989 * we don't need anything smarter at this point
990 *
991 * XXX Eventually check for collisions. They should NEVER happen.
992 * If problems seem to show up, it would be a good start to track
993 * them down.
994 */
0108d3fe 995static void __init reserve_mem(u64 base, u64 size)
9b6b563c 996{
cbbcf340 997 u64 top = base + size;
9b6b563c
PM		 998 unsigned long cnt = RELOC(mem_reserve_cnt);
999
1000 if (size == 0)
1001 return;
1002
1003 /* We need to always keep one empty entry so that we
1004 * have our terminator with "size" set to 0 since we are
1005 * dumb and just copy this entire array to the boot params
1006 */
1007 base = _ALIGN_DOWN(base, PAGE_SIZE);
1008 top = _ALIGN_UP(top, PAGE_SIZE);
1009 size = top - base;
1010
1011 if (cnt >= (MEM_RESERVE_MAP_SIZE - 1))
1012 prom_panic("Memory reserve map exhausted !\n");
1013 RELOC(mem_reserve_map)[cnt].base = base;
1014 RELOC(mem_reserve_map)[cnt].size = size;
1015 RELOC(mem_reserve_cnt) = cnt + 1;
1016}
1017
1018/*
b3c2ffd5 1019 * Initialize memory allocation mechanism, parse "memory" nodes and
9b6b563c
PM		 1020 * obtain that way the top of memory and RMO to setup out local allocator
1021 */
1022static void __init prom_init_mem(void)
1023{
1024 phandle node;
1025 char *path, type[64];
1026 unsigned int plen;
1027 cell_t *p, *endp;
1028 struct prom_t *_prom = &RELOC(prom);
1029 u32 rac, rsc;
1030
1031 /*
1032 * We iterate the memory nodes to find
1033 * 1) top of RMO (first node)
1034 * 2) top of memory
1035 */
1036 rac = 2;
1037 prom_getprop(_prom->root, "#address-cells", &rac, sizeof(rac));
1038 rsc = 1;
1039 prom_getprop(_prom->root, "#size-cells", &rsc, sizeof(rsc));
1040 prom_debug("root_addr_cells: %x\n", (unsigned long) rac);
1041 prom_debug("root_size_cells: %x\n", (unsigned long) rsc);
1042
1043 prom_debug("scanning memory:\n");
1044 path = RELOC(prom_scratch);
1045
1046 for (node = 0; prom_next_node(&node); ) {
1047 type[0] = 0;
1048 prom_getprop(node, "device_type", type, sizeof(type));
1049
c4988820
PM		 1050 if (type[0] == 0) {
1051 /*
1052 * CHRP Longtrail machines have no device_type
1053 * on the memory node, so check the name instead...
1054 */
1055 prom_getprop(node, "name", type, sizeof(type));
1056 }
9b6b563c
PM		 1057 if (strcmp(type, RELOC("memory")))
1058 continue;
c4988820 1059
9b6b563c
PM		 1060 plen = prom_getprop(node, "reg", RELOC(regbuf), sizeof(regbuf));
1061 if (plen > sizeof(regbuf)) {
1062 prom_printf("memory node too large for buffer !\n");
1063 plen = sizeof(regbuf);
1064 }
1065 p = RELOC(regbuf);
1066 endp = p + (plen / sizeof(cell_t));
1067
1068#ifdef DEBUG_PROM
1069 memset(path, 0, PROM_SCRATCH_SIZE);
1070 call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1);
1071 prom_debug(" node %s :\n", path);
1072#endif /* DEBUG_PROM */
1073
1074 while ((endp - p) >= (rac + rsc)) {
1075 unsigned long base, size;
1076
1077 base = prom_next_cell(rac, &p);
1078 size = prom_next_cell(rsc, &p);
1079
1080 if (size == 0)
1081 continue;
1082 prom_debug(" %x %x\n", base, size);
ab1b55e2 1083 if (base == 0 && (RELOC(of_platform) & PLATFORM_LPAR))
9b6b563c
PM		 1084 RELOC(rmo_top) = size;
1085 if ((base + size) > RELOC(ram_top))
1086 RELOC(ram_top) = base + size;
1087 }
1088 }
1089
1090 RELOC(alloc_bottom) = PAGE_ALIGN((unsigned long)&RELOC(_end) + 0x4000);
1091
1092 /* Check if we have an initrd after the kernel, if we do move our bottom
1093 * point to after it
1094 */
1095 if (RELOC(prom_initrd_start)) {
1096 if (RELOC(prom_initrd_end) > RELOC(alloc_bottom))
1097 RELOC(alloc_bottom) = PAGE_ALIGN(RELOC(prom_initrd_end));
1098 }
1099
cf68787b
BK		 1100 /*
1101 * If prom_memory_limit is set we reduce the upper limits *except* for
1102 * alloc_top_high. This must be the real top of RAM so we can put
1103 * TCE's up there.
1104 */
1105
1106 RELOC(alloc_top_high) = RELOC(ram_top);
1107
1108 if (RELOC(prom_memory_limit)) {
1109 if (RELOC(prom_memory_limit) <= RELOC(alloc_bottom)) {
1110 prom_printf("Ignoring mem=%x <= alloc_bottom.\n",
1111 RELOC(prom_memory_limit));
1112 RELOC(prom_memory_limit) = 0;
1113 } else if (RELOC(prom_memory_limit) >= RELOC(ram_top)) {
1114 prom_printf("Ignoring mem=%x >= ram_top.\n",
1115 RELOC(prom_memory_limit));
1116 RELOC(prom_memory_limit) = 0;
1117 } else {
1118 RELOC(ram_top) = RELOC(prom_memory_limit);
1119 RELOC(rmo_top) = min(RELOC(rmo_top), RELOC(prom_memory_limit));
1120 }
1121 }
1122
9b6b563c
PM		 1123 /*
1124 * Setup our top alloc point, that is top of RMO or top of
1125 * segment 0 when running non-LPAR.
1126 * Some RS64 machines have buggy firmware where claims up at
1127 * 1GB fail. Cap at 768MB as a workaround.
1128 * Since 768MB is plenty of room, and we need to cap to something
1129 * reasonable on 32-bit, cap at 768MB on all machines.
1130 */
1131 if (!RELOC(rmo_top))
1132 RELOC(rmo_top) = RELOC(ram_top);
1133 RELOC(rmo_top) = min(0x30000000ul, RELOC(rmo_top));
1134 RELOC(alloc_top) = RELOC(rmo_top);
2babf5c2 1135 RELOC(alloc_top_high) = RELOC(ram_top);
9b6b563c
PM		 1136
1137 prom_printf("memory layout at init:\n");
cf68787b 1138 prom_printf(" memory_limit : %x (16 MB aligned)\n", RELOC(prom_memory_limit));
9b6b563c
PM		 1139 prom_printf(" alloc_bottom : %x\n", RELOC(alloc_bottom));
1140 prom_printf(" alloc_top : %x\n", RELOC(alloc_top));
1141 prom_printf(" alloc_top_hi : %x\n", RELOC(alloc_top_high));
1142 prom_printf(" rmo_top : %x\n", RELOC(rmo_top));
1143 prom_printf(" ram_top : %x\n", RELOC(ram_top));
1144}
1145
1146
1147/*
1148 * Allocate room for and instantiate RTAS
1149 */
1150static void __init prom_instantiate_rtas(void)
1151{
1152 phandle rtas_node;
1153 ihandle rtas_inst;
1154 u32 base, entry = 0;
1155 u32 size = 0;
1156
1157 prom_debug("prom_instantiate_rtas: start...\n");
1158
1159 rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas"));
1160 prom_debug("rtas_node: %x\n", rtas_node);
1161 if (!PHANDLE_VALID(rtas_node))
1162 return;
1163
1164 prom_getprop(rtas_node, "rtas-size", &size, sizeof(size));
1165 if (size == 0)
1166 return;
1167
1168 base = alloc_down(size, PAGE_SIZE, 0);
1169 if (base == 0) {
1170 prom_printf("RTAS allocation failed !\n");
1171 return;
1172 }
1173
1174 rtas_inst = call_prom("open", 1, 1, ADDR("/rtas"));
1175 if (!IHANDLE_VALID(rtas_inst)) {
a23414be 1176 prom_printf("opening rtas package failed (%x)\n", rtas_inst);
9b6b563c
PM		 1177 return;
1178 }
1179
1f8737aa 1180 prom_printf("instantiating rtas at 0x%x...", base);
9b6b563c
PM		 1181
1182 if (call_prom_ret("call-method", 3, 2, &entry,
1183 ADDR("instantiate-rtas"),
a23414be 1184 rtas_inst, base) != 0
9b6b563c
PM		 1185 || entry == 0) {
1186 prom_printf(" failed\n");
1187 return;
1188 }
1189 prom_printf(" done\n");
1190
1191 reserve_mem(base, size);
1192
a23414be
PM		 1193 prom_setprop(rtas_node, "/rtas", "linux,rtas-base",
1194 &base, sizeof(base));
1195 prom_setprop(rtas_node, "/rtas", "linux,rtas-entry",
1196 &entry, sizeof(entry));
9b6b563c
PM		 1197
1198 prom_debug("rtas base = 0x%x\n", base);
1199 prom_debug("rtas entry = 0x%x\n", entry);
1200 prom_debug("rtas size = 0x%x\n", (long)size);
1201
1202 prom_debug("prom_instantiate_rtas: end...\n");
1203}
1204
1205#ifdef CONFIG_PPC64
1206/*
1207 * Allocate room for and initialize TCE tables
1208 */
1209static void __init prom_initialize_tce_table(void)
1210{
1211 phandle node;
1212 ihandle phb_node;
1213 char compatible[64], type[64], model[64];
1214 char *path = RELOC(prom_scratch);
1215 u64 base, align;
1216 u32 minalign, minsize;
1217 u64 tce_entry, *tce_entryp;
1218 u64 local_alloc_top, local_alloc_bottom;
1219 u64 i;
1220
165785e5 1221 if (RELOC(prom_iommu_off))
9b6b563c
PM		 1222 return;
1223
1224 prom_debug("starting prom_initialize_tce_table\n");
1225
1226 /* Cache current top of allocs so we reserve a single block */
1227 local_alloc_top = RELOC(alloc_top_high);
1228 local_alloc_bottom = local_alloc_top;
1229
1230 /* Search all nodes looking for PHBs. */
1231 for (node = 0; prom_next_node(&node); ) {
1232 compatible[0] = 0;
1233 type[0] = 0;
1234 model[0] = 0;
1235 prom_getprop(node, "compatible",
1236 compatible, sizeof(compatible));
1237 prom_getprop(node, "device_type", type, sizeof(type));
1238 prom_getprop(node, "model", model, sizeof(model));
1239
1240 if ((type[0] == 0) || (strstr(type, RELOC("pci")) == NULL))
1241 continue;
1242
e788ff13 1243 /* Keep the old logic intact to avoid regression. */
9b6b563c
PM		 1244 if (compatible[0] != 0) {
1245 if ((strstr(compatible, RELOC("python")) == NULL) &&
1246 (strstr(compatible, RELOC("Speedwagon")) == NULL) &&
1247 (strstr(compatible, RELOC("Winnipeg")) == NULL))
1248 continue;
1249 } else if (model[0] != 0) {
1250 if ((strstr(model, RELOC("ython")) == NULL) &&
1251 (strstr(model, RELOC("peedwagon")) == NULL) &&
1252 (strstr(model, RELOC("innipeg")) == NULL))
1253 continue;
1254 }
1255
1256 if (prom_getprop(node, "tce-table-minalign", &minalign,
1257 sizeof(minalign)) == PROM_ERROR)
1258 minalign = 0;
1259 if (prom_getprop(node, "tce-table-minsize", &minsize,
1260 sizeof(minsize)) == PROM_ERROR)
1261 minsize = 4UL << 20;
1262
1263 /*
1264 * Even though we read what OF wants, we just set the table
1265 * size to 4 MB. This is enough to map 2GB of PCI DMA space.
1266 * By doing this, we avoid the pitfalls of trying to DMA to
1267 * MMIO space and the DMA alias hole.
1268 *
1269 * On POWER4, firmware sets the TCE region by assuming
1270 * each TCE table is 8MB. Using this memory for anything
1271 * else will impact performance, so we always allocate 8MB.
1272 * Anton
1273 */
1274 if (__is_processor(PV_POWER4) || __is_processor(PV_POWER4p))
1275 minsize = 8UL << 20;
1276 else
1277 minsize = 4UL << 20;
1278
1279 /* Align to the greater of the align or size */
1280 align = max(minalign, minsize);
1281 base = alloc_down(minsize, align, 1);
1282 if (base == 0)
1283 prom_panic("ERROR, cannot find space for TCE table.\n");
1284 if (base < local_alloc_bottom)
1285 local_alloc_bottom = base;
1286
9b6b563c 1287 /* It seems OF doesn't null-terminate the path :-( */
aca71ef8 1288 memset(path, 0, PROM_SCRATCH_SIZE);
9b6b563c
PM		 1289 /* Call OF to setup the TCE hardware */
1290 if (call_prom("package-to-path", 3, 1, node,
1291 path, PROM_SCRATCH_SIZE-1) == PROM_ERROR) {
1292 prom_printf("package-to-path failed\n");
1293 }
1294
a23414be
PM		 1295 /* Save away the TCE table attributes for later use. */
1296 prom_setprop(node, path, "linux,tce-base", &base, sizeof(base));
1297 prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize));
1298
9b6b563c
PM		 1299 prom_debug("TCE table: %s\n", path);
1300 prom_debug("\tnode = 0x%x\n", node);
1301 prom_debug("\tbase = 0x%x\n", base);
1302 prom_debug("\tsize = 0x%x\n", minsize);
1303
1304 /* Initialize the table to have a one-to-one mapping
1305 * over the allocated size.
1306 */
2b931fb6 1307 tce_entryp = (u64 *)base;
9b6b563c
PM		 1308 for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) {
1309 tce_entry = (i << PAGE_SHIFT);
1310 tce_entry |= 0x3;
1311 *tce_entryp = tce_entry;
1312 }
1313
1314 prom_printf("opening PHB %s", path);
1315 phb_node = call_prom("open", 1, 1, path);
1316 if (phb_node == 0)
1317 prom_printf("... failed\n");
1318 else
1319 prom_printf("... done\n");
1320
1321 call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"),
1322 phb_node, -1, minsize,
1323 (u32) base, (u32) (base >> 32));
1324 call_prom("close", 1, 0, phb_node);
1325 }
1326
1327 reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom);
1328
2babf5c2
ME		 1329 /* These are only really needed if there is a memory limit in
1330 * effect, but we don't know so export them always. */
1331 RELOC(prom_tce_alloc_start) = local_alloc_bottom;
1332 RELOC(prom_tce_alloc_end) = local_alloc_top;
9b6b563c
PM		 1333
1334 /* Flag the first invalid entry */
1335 prom_debug("ending prom_initialize_tce_table\n");
1336}
1337#endif
1338
1339/*
1340 * With CHRP SMP we need to use the OF to start the other processors.
1341 * We can't wait until smp_boot_cpus (the OF is trashed by then)
1342 * so we have to put the processors into a holding pattern controlled
1343 * by the kernel (not OF) before we destroy the OF.
1344 *
1345 * This uses a chunk of low memory, puts some holding pattern
1346 * code there and sends the other processors off to there until
1347 * smp_boot_cpus tells them to do something. The holding pattern
1348 * checks that address until its cpu # is there, when it is that
1349 * cpu jumps to __secondary_start(). smp_boot_cpus() takes care
1350 * of setting those values.
1351 *
1352 * We also use physical address 0x4 here to tell when a cpu
1353 * is in its holding pattern code.
1354 *
1355 * -- Cort
1356 */
bbd0abda
PM		 1357/*
1358 * We want to reference the copy of __secondary_hold_* in the
1359 * 0 - 0x100 address range
1360 */
1361#define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff)
1362
9b6b563c
PM		 1363static void __init prom_hold_cpus(void)
1364{
9b6b563c
PM		 1365 unsigned long i;
1366 unsigned int reg;
1367 phandle node;
1368 char type[64];
bbd0abda 1369 struct prom_t *_prom = &RELOC(prom);
9b6b563c 1370 unsigned long *spinloop
bbd0abda 1371 = (void *) LOW_ADDR(__secondary_hold_spinloop);
9b6b563c 1372 unsigned long *acknowledge
bbd0abda 1373 = (void *) LOW_ADDR(__secondary_hold_acknowledge);
bbd0abda 1374 unsigned long secondary_hold = LOW_ADDR(__secondary_hold);
9b6b563c
PM		 1375
1376 prom_debug("prom_hold_cpus: start...\n");
1377 prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop);
1378 prom_debug(" 1) *spinloop = 0x%x\n", *spinloop);
1379 prom_debug(" 1) acknowledge = 0x%x\n",
1380 (unsigned long)acknowledge);
1381 prom_debug(" 1) *acknowledge = 0x%x\n", *acknowledge);
1382 prom_debug(" 1) secondary_hold = 0x%x\n", secondary_hold);
1383
1384 /* Set the common spinloop variable, so all of the secondary cpus
1385 * will block when they are awakened from their OF spinloop.
1386 * This must occur for both SMP and non SMP kernels, since OF will
1387 * be trashed when we move the kernel.
1388 */
1389 *spinloop = 0;
1390
9b6b563c
PM		 1391 /* look for cpus */
1392 for (node = 0; prom_next_node(&node); ) {
1393 type[0] = 0;
1394 prom_getprop(node, "device_type", type, sizeof(type));
1395 if (strcmp(type, RELOC("cpu")) != 0)
1396 continue;
1397
1398 /* Skip non-configured cpus. */
1399 if (prom_getprop(node, "status", type, sizeof(type)) > 0)
1400 if (strcmp(type, RELOC("okay")) != 0)
1401 continue;
1402
1403 reg = -1;
1404 prom_getprop(node, "reg", &reg, sizeof(reg));
1405
9b6b563c
PM		 1406 prom_debug("cpu hw idx = 0x%x\n", reg);
1407
1408 /* Init the acknowledge var which will be reset by
1409 * the secondary cpu when it awakens from its OF
1410 * spinloop.
1411 */
1412 *acknowledge = (unsigned long)-1;
1413
7d2f6075 1414 if (reg != _prom->cpu) {
9b6b563c 1415 /* Primary Thread of non-boot cpu */
7d2f6075 1416 prom_printf("starting cpu hw idx %x... ", reg);
9b6b563c
PM		 1417 call_prom("start-cpu", 3, 0, node,
1418 secondary_hold, reg);
1419
bbd0abda
PM		 1420 for (i = 0; (i < 100000000) &&
1421 (*acknowledge == ((unsigned long)-1)); i++ )
9b6b563c
PM		 1422 mb();
1423
bbd0abda 1424 if (*acknowledge == reg)
9b6b563c 1425 prom_printf("done\n");
bbd0abda 1426 else
9b6b563c 1427 prom_printf("failed: %x\n", *acknowledge);
9b6b563c
PM		 1428 }
1429#ifdef CONFIG_SMP
1430 else
7d2f6075 1431 prom_printf("boot cpu hw idx %x\n", reg);
9b6b563c 1432#endif /* CONFIG_SMP */
9b6b563c 1433 }
9b6b563c 1434
9b6b563c 1435 prom_debug("prom_hold_cpus: end...\n");
9b6b563c
PM		 1436}
1437
1438
1439static void __init prom_init_client_services(unsigned long pp)
1440{
1441 struct prom_t *_prom = &RELOC(prom);
1442
1443 /* Get a handle to the prom entry point before anything else */
1444 RELOC(prom_entry) = pp;
1445
1446 /* get a handle for the stdout device */
1447 _prom->chosen = call_prom("finddevice", 1, 1, ADDR("/chosen"));
1448 if (!PHANDLE_VALID(_prom->chosen))
1449 prom_panic("cannot find chosen"); /* msg won't be printed :( */
1450
1451 /* get device tree root */
1452 _prom->root = call_prom("finddevice", 1, 1, ADDR("/"));
1453 if (!PHANDLE_VALID(_prom->root))
1454 prom_panic("cannot find device tree root"); /* msg won't be printed :( */
a575b807
PM		 1455
1456 _prom->mmumap = 0;
1457}
1458
1459#ifdef CONFIG_PPC32
1460/*
1461 * For really old powermacs, we need to map things we claim.
1462 * For that, we need the ihandle of the mmu.
a23414be 1463 * Also, on the longtrail, we need to work around other bugs.
a575b807
PM		 1464 */
1465static void __init prom_find_mmu(void)
1466{
1467 struct prom_t *_prom = &RELOC(prom);
1468 phandle oprom;
1469 char version[64];
1470
1471 oprom = call_prom("finddevice", 1, 1, ADDR("/openprom"));
1472 if (!PHANDLE_VALID(oprom))
1473 return;
1474 if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0)
1475 return;
1476 version[sizeof(version) - 1] = 0;
a575b807 1477 /* XXX might need to add other versions here */
a23414be
PM		 1478 if (strcmp(version, "Open Firmware, 1.0.5") == 0)
1479 of_workarounds = OF_WA_CLAIM;
1480 else if (strncmp(version, "FirmWorks,3.", 12) == 0) {
1481 of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL;
1482 call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim");
1483 } else
a575b807 1484 return;
a23414be 1485 _prom->memory = call_prom("open", 1, 1, ADDR("/memory"));
a575b807
PM		 1486 prom_getprop(_prom->chosen, "mmu", &_prom->mmumap,
1487 sizeof(_prom->mmumap));
a23414be
PM		 1488 if (!IHANDLE_VALID(_prom->memory) || !IHANDLE_VALID(_prom->mmumap))
1489 of_workarounds &= ~OF_WA_CLAIM; /* hmmm */
9b6b563c 1490}
a575b807
PM		 1491#else
1492#define prom_find_mmu()
1493#endif
9b6b563c
PM		 1494
1495static void __init prom_init_stdout(void)
1496{
1497 struct prom_t *_prom = &RELOC(prom);
1498 char *path = RELOC(of_stdout_device);
1499 char type[16];
1500 u32 val;
1501
1502 if (prom_getprop(_prom->chosen, "stdout", &val, sizeof(val)) <= 0)
1503 prom_panic("cannot find stdout");
1504
1505 _prom->stdout = val;
1506
1507 /* Get the full OF pathname of the stdout device */
1508 memset(path, 0, 256);
1509 call_prom("instance-to-path", 3, 1, _prom->stdout, path, 255);
1510 val = call_prom("instance-to-package", 1, 1, _prom->stdout);
a23414be
PM		 1511 prom_setprop(_prom->chosen, "/chosen", "linux,stdout-package",
1512 &val, sizeof(val));
9b6b563c 1513 prom_printf("OF stdout device is: %s\n", RELOC(of_stdout_device));
a23414be
PM		 1514 prom_setprop(_prom->chosen, "/chosen", "linux,stdout-path",
1515 path, strlen(path) + 1);
9b6b563c
PM		 1516
1517 /* If it's a display, note it */
1518 memset(type, 0, sizeof(type));
1519 prom_getprop(val, "device_type", type, sizeof(type));
1520 if (strcmp(type, RELOC("display")) == 0)
a23414be 1521 prom_setprop(val, path, "linux,boot-display", NULL, 0);
9b6b563c
PM		 1522}
1523
1524static void __init prom_close_stdin(void)
1525{
1526 struct prom_t *_prom = &RELOC(prom);
1527 ihandle val;
1528
1529 if (prom_getprop(_prom->chosen, "stdin", &val, sizeof(val)) > 0)
1530 call_prom("close", 1, 0, val);
1531}
1532
1533static int __init prom_find_machine_type(void)
1534{
1535 struct prom_t *_prom = &RELOC(prom);
1536 char compat[256];
1537 int len, i = 0;
21fe3301 1538#ifdef CONFIG_PPC64
9b6b563c 1539 phandle rtas;
e8222502 1540 int x;
21fe3301 1541#endif
e8222502
BH		 1542
1543 /* Look for a PowerMac */
9b6b563c
PM		 1544 len = prom_getprop(_prom->root, "compatible",
1545 compat, sizeof(compat)-1);
1546 if (len > 0) {
1547 compat[len] = 0;
1548 while (i < len) {
1549 char *p = &compat[i];
1550 int sl = strlen(p);
1551 if (sl == 0)
1552 break;
1553 if (strstr(p, RELOC("Power Macintosh")) ||
a575b807 1554 strstr(p, RELOC("MacRISC")))
9b6b563c 1555 return PLATFORM_POWERMAC;
133dda1e
AB		 1556#ifdef CONFIG_PPC64
1557 /* We must make sure we don't detect the IBM Cell
1558 * blades as pSeries due to some firmware issues,
1559 * so we do it here.
1560 */
1561 if (strstr(p, RELOC("IBM,CBEA")) ||
1562 strstr(p, RELOC("IBM,CPBW-1.0")))
1563 return PLATFORM_GENERIC;
1564#endif /* CONFIG_PPC64 */
9b6b563c
PM		 1565 i += sl + 1;
1566 }
1567 }
1568#ifdef CONFIG_PPC64
e8222502
BH		 1569 /* If not a mac, try to figure out if it's an IBM pSeries or any other
1570 * PAPR compliant platform. We assume it is if :
1571 * - /device_type is "chrp" (please, do NOT use that for future
1572 * non-IBM designs !
1573 * - it has /rtas
1574 */
6f806cee 1575 len = prom_getprop(_prom->root, "device_type",
e8222502
BH		 1576 compat, sizeof(compat)-1);
1577 if (len <= 0)
1578 return PLATFORM_GENERIC;
cb6b2eb9 1579 if (strcmp(compat, RELOC("chrp")))
e8222502
BH		 1580 return PLATFORM_GENERIC;
1581
9b6b563c
PM		 1582 /* Default to pSeries. We need to know if we are running LPAR */
1583 rtas = call_prom("finddevice", 1, 1, ADDR("/rtas"));
e8222502
BH		 1584 if (!PHANDLE_VALID(rtas))
1585 return PLATFORM_GENERIC;
1586 x = prom_getproplen(rtas, "ibm,hypertas-functions");
1587 if (x != PROM_ERROR) {
4da727ae 1588 prom_debug("Hypertas detected, assuming LPAR !\n");
e8222502 1589 return PLATFORM_PSERIES_LPAR;
9b6b563c
PM		 1590 }
1591 return PLATFORM_PSERIES;
1592#else
e8222502 1593 return PLATFORM_GENERIC;
9b6b563c
PM		 1594#endif
1595}
1596
9b6b563c
PM		 1597static int __init prom_set_color(ihandle ih, int i, int r, int g, int b)
1598{
1599 return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r);
1600}
1601
1602/*
1603 * If we have a display that we don't know how to drive,
1604 * we will want to try to execute OF's open method for it
1605 * later. However, OF will probably fall over if we do that
1606 * we've taken over the MMU.
1607 * So we check whether we will need to open the display,
1608 * and if so, open it now.
1609 */
1610static void __init prom_check_displays(void)
1611{
1612 char type[16], *path;
1613 phandle node;
1614 ihandle ih;
1615 int i;
9b6b563c
PM		 1616
1617 static unsigned char default_colors[] = {
1618 0x00, 0x00, 0x00,
1619 0x00, 0x00, 0xaa,
1620 0x00, 0xaa, 0x00,
1621 0x00, 0xaa, 0xaa,
1622 0xaa, 0x00, 0x00,
1623 0xaa, 0x00, 0xaa,
1624 0xaa, 0xaa, 0x00,
1625 0xaa, 0xaa, 0xaa,
1626 0x55, 0x55, 0x55,
1627 0x55, 0x55, 0xff,
1628 0x55, 0xff, 0x55,
1629 0x55, 0xff, 0xff,
1630 0xff, 0x55, 0x55,
1631 0xff, 0x55, 0xff,
1632 0xff, 0xff, 0x55,
1633 0xff, 0xff, 0xff
1634 };
1635 const unsigned char *clut;
1636
4da727ae 1637 prom_debug("Looking for displays\n");
9b6b563c
PM		 1638 for (node = 0; prom_next_node(&node); ) {
1639 memset(type, 0, sizeof(type));
1640 prom_getprop(node, "device_type", type, sizeof(type));
1641 if (strcmp(type, RELOC("display")) != 0)
1642 continue;
1643
1644 /* It seems OF doesn't null-terminate the path :-( */
1645 path = RELOC(prom_scratch);
1646 memset(path, 0, PROM_SCRATCH_SIZE);
1647
1648 /*
1649 * leave some room at the end of the path for appending extra
1650 * arguments
1651 */
1652 if (call_prom("package-to-path", 3, 1, node, path,
1653 PROM_SCRATCH_SIZE-10) == PROM_ERROR)
1654 continue;
1f8737aa 1655 prom_printf("found display : %s, opening... ", path);
9b6b563c
PM		 1656
1657 ih = call_prom("open", 1, 1, path);
1658 if (ih == 0) {
1659 prom_printf("failed\n");
1660 continue;
1661 }
1662
1663 /* Success */
1664 prom_printf("done\n");
a23414be 1665 prom_setprop(node, path, "linux,opened", NULL, 0);
9b6b563c
PM		 1666
1667 /* Setup a usable color table when the appropriate
1668 * method is available. Should update this to set-colors */
1669 clut = RELOC(default_colors);
1670 for (i = 0; i < 32; i++, clut += 3)
1671 if (prom_set_color(ih, i, clut[0], clut[1],
1672 clut[2]) != 0)
1673 break;
1674
1675#ifdef CONFIG_LOGO_LINUX_CLUT224
1676 clut = PTRRELOC(RELOC(logo_linux_clut224.clut));
1677 for (i = 0; i < RELOC(logo_linux_clut224.clutsize); i++, clut += 3)
1678 if (prom_set_color(ih, i + 32, clut[0], clut[1],
1679 clut[2]) != 0)
1680 break;
1681#endif /* CONFIG_LOGO_LINUX_CLUT224 */
9b6b563c
PM		 1682 }
1683}
1684
1685
1686/* Return (relocated) pointer to this much memory: moves initrd if reqd. */
1687static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end,
1688 unsigned long needed, unsigned long align)
1689{
1690 void *ret;
1691
1692 *mem_start = _ALIGN(*mem_start, align);
1693 while ((*mem_start + needed) > *mem_end) {
1694 unsigned long room, chunk;
1695
1696 prom_debug("Chunk exhausted, claiming more at %x...\n",
1697 RELOC(alloc_bottom));
1698 room = RELOC(alloc_top) - RELOC(alloc_bottom);
1699 if (room > DEVTREE_CHUNK_SIZE)
1700 room = DEVTREE_CHUNK_SIZE;
1701 if (room < PAGE_SIZE)
1702 prom_panic("No memory for flatten_device_tree (no room)");
1703 chunk = alloc_up(room, 0);
1704 if (chunk == 0)
1705 prom_panic("No memory for flatten_device_tree (claim failed)");
1706 *mem_end = RELOC(alloc_top);
1707 }
1708
1709 ret = (void *)*mem_start;
1710 *mem_start += needed;
1711
1712 return ret;
1713}
1714
1715#define dt_push_token(token, mem_start, mem_end) \
1716 do { *((u32 *)make_room(mem_start, mem_end, 4, 4)) = token; } while(0)
1717
1718static unsigned long __init dt_find_string(char *str)
1719{
1720 char *s, *os;
1721
1722 s = os = (char *)RELOC(dt_string_start);
1723 s += 4;
1724 while (s < (char *)RELOC(dt_string_end)) {
1725 if (strcmp(s, str) == 0)
1726 return s - os;
1727 s += strlen(s) + 1;
1728 }
1729 return 0;
1730}
1731
1732/*
1733 * The Open Firmware 1275 specification states properties must be 31 bytes or
1734 * less, however not all firmwares obey this. Make it 64 bytes to be safe.
1735 */
1736#define MAX_PROPERTY_NAME 64
1737
1738static void __init scan_dt_build_strings(phandle node,
1739 unsigned long *mem_start,
1740 unsigned long *mem_end)
1741{
1742 char *prev_name, *namep, *sstart;
1743 unsigned long soff;
1744 phandle child;
1745
1746 sstart = (char *)RELOC(dt_string_start);
1747
1748 /* get and store all property names */
1749 prev_name = RELOC("");
1750 for (;;) {
1751 /* 64 is max len of name including nul. */
1752 namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1);
1753 if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) {
1754 /* No more nodes: unwind alloc */
1755 *mem_start = (unsigned long)namep;
1756 break;
1757 }
1758
1759 /* skip "name" */
1760 if (strcmp(namep, RELOC("name")) == 0) {
1761 *mem_start = (unsigned long)namep;
1762 prev_name = RELOC("name");
1763 continue;
1764 }
1765 /* get/create string entry */
1766 soff = dt_find_string(namep);
1767 if (soff != 0) {
1768 *mem_start = (unsigned long)namep;
1769 namep = sstart + soff;
1770 } else {
1771 /* Trim off some if we can */
1772 *mem_start = (unsigned long)namep + strlen(namep) + 1;
1773 RELOC(dt_string_end) = *mem_start;
1774 }
1775 prev_name = namep;
1776 }
1777
1778 /* do all our children */
1779 child = call_prom("child", 1, 1, node);
1780 while (child != 0) {
1781 scan_dt_build_strings(child, mem_start, mem_end);
1782 child = call_prom("peer", 1, 1, child);
1783 }
1784}
1785
1786static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
1787 unsigned long *mem_end)
1788{
1789 phandle child;
1790 char *namep, *prev_name, *sstart, *p, *ep, *lp, *path;
1791 unsigned long soff;
1792 unsigned char *valp;
1793 static char pname[MAX_PROPERTY_NAME];
c4988820 1794 int l, room;
9b6b563c
PM		 1795
1796 dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end);
1797
1798 /* get the node's full name */
1799 namep = (char *)*mem_start;
c4988820
PM		 1800 room = *mem_end - *mem_start;
1801 if (room > 255)
1802 room = 255;
1803 l = call_prom("package-to-path", 3, 1, node, namep, room);
9b6b563c
PM		 1804 if (l >= 0) {
1805 /* Didn't fit? Get more room. */
c4988820
PM		 1806 if (l >= room) {
1807 if (l >= *mem_end - *mem_start)
1808 namep = make_room(mem_start, mem_end, l+1, 1);
9b6b563c
PM		 1809 call_prom("package-to-path", 3, 1, node, namep, l);
1810 }
1811 namep[l] = '\0';
1812
1813 /* Fixup an Apple bug where they have bogus \0 chars in the
a575b807
PM		 1814 * middle of the path in some properties, and extract
1815 * the unit name (everything after the last '/').
9b6b563c 1816 */
a575b807 1817 for (lp = p = namep, ep = namep + l; p < ep; p++) {
9b6b563c 1818 if (*p == '/')
a575b807
PM		 1819 lp = namep;
1820 else if (*p != 0)
1821 *lp++ = *p;
1822 }
1823 *lp = 0;
1824 *mem_start = _ALIGN((unsigned long)lp + 1, 4);
9b6b563c
PM		 1825 }
1826
1827 /* get it again for debugging */
1828 path = RELOC(prom_scratch);
1829 memset(path, 0, PROM_SCRATCH_SIZE);
1830 call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1);
1831
1832 /* get and store all properties */
1833 prev_name = RELOC("");
1834 sstart = (char *)RELOC(dt_string_start);
1835 for (;;) {
1836 if (call_prom("nextprop", 3, 1, node, prev_name,
1837 RELOC(pname)) != 1)
1838 break;
1839
1840 /* skip "name" */
1841 if (strcmp(RELOC(pname), RELOC("name")) == 0) {
1842 prev_name = RELOC("name");
1843 continue;
1844 }
1845
1846 /* find string offset */
1847 soff = dt_find_string(RELOC(pname));
1848 if (soff == 0) {
1849 prom_printf("WARNING: Can't find string index for"
1850 " <%s>, node %s\n", RELOC(pname), path);
1851 break;
1852 }
1853 prev_name = sstart + soff;
1854
1855 /* get length */
1856 l = call_prom("getproplen", 2, 1, node, RELOC(pname));
1857
1858 /* sanity checks */
1859 if (l == PROM_ERROR)
1860 continue;
1861 if (l > MAX_PROPERTY_LENGTH) {
1862 prom_printf("WARNING: ignoring large property ");
1863 /* It seems OF doesn't null-terminate the path :-( */
1864 prom_printf("[%s] ", path);
1865 prom_printf("%s length 0x%x\n", RELOC(pname), l);
1866 continue;
1867 }
1868
1869 /* push property head */
1870 dt_push_token(OF_DT_PROP, mem_start, mem_end);
1871 dt_push_token(l, mem_start, mem_end);
1872 dt_push_token(soff, mem_start, mem_end);
1873
1874 /* push property content */
1875 valp = make_room(mem_start, mem_end, l, 4);
1876 call_prom("getprop", 4, 1, node, RELOC(pname), valp, l);
1877 *mem_start = _ALIGN(*mem_start, 4);
1878 }
1879
1880 /* Add a "linux,phandle" property. */
1881 soff = dt_find_string(RELOC("linux,phandle"));
1882 if (soff == 0)
1883 prom_printf("WARNING: Can't find string index for"
1884 " <linux-phandle> node %s\n", path);
1885 else {
1886 dt_push_token(OF_DT_PROP, mem_start, mem_end);
1887 dt_push_token(4, mem_start, mem_end);
1888 dt_push_token(soff, mem_start, mem_end);
1889 valp = make_room(mem_start, mem_end, 4, 4);
1890 *(u32 *)valp = node;
1891 }
1892
1893 /* do all our children */
1894 child = call_prom("child", 1, 1, node);
1895 while (child != 0) {
1896 scan_dt_build_struct(child, mem_start, mem_end);
1897 child = call_prom("peer", 1, 1, child);
1898 }
1899
1900 dt_push_token(OF_DT_END_NODE, mem_start, mem_end);
1901}
1902
1903static void __init flatten_device_tree(void)
1904{
1905 phandle root;
1906 unsigned long mem_start, mem_end, room;
1907 struct boot_param_header *hdr;
1908 struct prom_t *_prom = &RELOC(prom);
1909 char *namep;
1910 u64 *rsvmap;
1911
1912 /*
1913 * Check how much room we have between alloc top & bottom (+/- a
1914 * few pages), crop to 4Mb, as this is our "chuck" size
1915 */
1916 room = RELOC(alloc_top) - RELOC(alloc_bottom) - 0x4000;
1917 if (room > DEVTREE_CHUNK_SIZE)
1918 room = DEVTREE_CHUNK_SIZE;
1919 prom_debug("starting device tree allocs at %x\n", RELOC(alloc_bottom));
1920
1921 /* Now try to claim that */
1922 mem_start = (unsigned long)alloc_up(room, PAGE_SIZE);
1923 if (mem_start == 0)
1924 prom_panic("Can't allocate initial device-tree chunk\n");
1925 mem_end = RELOC(alloc_top);
1926
1927 /* Get root of tree */
1928 root = call_prom("peer", 1, 1, (phandle)0);
1929 if (root == (phandle)0)
1930 prom_panic ("couldn't get device tree root\n");
1931
1932 /* Build header and make room for mem rsv map */
1933 mem_start = _ALIGN(mem_start, 4);
1934 hdr = make_room(&mem_start, &mem_end,
1935 sizeof(struct boot_param_header), 4);
1936 RELOC(dt_header_start) = (unsigned long)hdr;
1937 rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8);
1938
1939 /* Start of strings */
1940 mem_start = PAGE_ALIGN(mem_start);
1941 RELOC(dt_string_start) = mem_start;
1942 mem_start += 4; /* hole */
1943
1944 /* Add "linux,phandle" in there, we'll need it */
1945 namep = make_room(&mem_start, &mem_end, 16, 1);
1946 strcpy(namep, RELOC("linux,phandle"));
1947 mem_start = (unsigned long)namep + strlen(namep) + 1;
1948
1949 /* Build string array */
1950 prom_printf("Building dt strings...\n");
1951 scan_dt_build_strings(root, &mem_start, &mem_end);
1952 RELOC(dt_string_end) = mem_start;
1953
1954 /* Build structure */
1955 mem_start = PAGE_ALIGN(mem_start);
1956 RELOC(dt_struct_start) = mem_start;
1957 prom_printf("Building dt structure...\n");
1958 scan_dt_build_struct(root, &mem_start, &mem_end);
1959 dt_push_token(OF_DT_END, &mem_start, &mem_end);
1960 RELOC(dt_struct_end) = PAGE_ALIGN(mem_start);
1961
1962 /* Finish header */
1963 hdr->boot_cpuid_phys = _prom->cpu;
1964 hdr->magic = OF_DT_HEADER;
1965 hdr->totalsize = RELOC(dt_struct_end) - RELOC(dt_header_start);
1966 hdr->off_dt_struct = RELOC(dt_struct_start) - RELOC(dt_header_start);
1967 hdr->off_dt_strings = RELOC(dt_string_start) - RELOC(dt_header_start);
1968 hdr->dt_strings_size = RELOC(dt_string_end) - RELOC(dt_string_start);
1969 hdr->off_mem_rsvmap = ((unsigned long)rsvmap) - RELOC(dt_header_start);
1970 hdr->version = OF_DT_VERSION;
1971 /* Version 16 is not backward compatible */
1972 hdr->last_comp_version = 0x10;
1973
4d1f3f25 1974 /* Copy the reserve map in */
9b6b563c
PM		 1975 memcpy(rsvmap, RELOC(mem_reserve_map), sizeof(mem_reserve_map));
1976
1977#ifdef DEBUG_PROM
1978 {
1979 int i;
1980 prom_printf("reserved memory map:\n");
1981 for (i = 0; i < RELOC(mem_reserve_cnt); i++)
1982 prom_printf(" %x - %x\n",
1983 RELOC(mem_reserve_map)[i].base,
1984 RELOC(mem_reserve_map)[i].size);
1985 }
1986#endif
4d1f3f25
JX		 1987 /* Bump mem_reserve_cnt to cause further reservations to fail
1988 * since it's too late.
1989 */
9b6b563c
PM		 1990 RELOC(mem_reserve_cnt) = MEM_RESERVE_MAP_SIZE;
1991
1992 prom_printf("Device tree strings 0x%x -> 0x%x\n",
1993 RELOC(dt_string_start), RELOC(dt_string_end));
1994 prom_printf("Device tree struct 0x%x -> 0x%x\n",
1995 RELOC(dt_struct_start), RELOC(dt_struct_end));
1996
1997}
1998
54f4ee18
HB		 1999#ifdef CONFIG_PPC_MAPLE
2000/* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property.
2001 * The values are bad, and it doesn't even have the right number of cells. */
2002static void __init fixup_device_tree_maple(void)
9b6b563c 2003{
54f4ee18 2004 phandle isa;
980a6513 2005 u32 rloc = 0x01002000; /* IO space; PCI device = 4 */
54f4ee18 2006 u32 isa_ranges[6];
980a6513
BH		 2007 char *name;
2008
2009 name = "/ht@0/isa@4";
2010 isa = call_prom("finddevice", 1, 1, ADDR(name));
2011 if (!PHANDLE_VALID(isa)) {
2012 name = "/ht@0/isa@6";
2013 isa = call_prom("finddevice", 1, 1, ADDR(name));
2014 rloc = 0x01003000; /* IO space; PCI device = 6 */
2015 }
54f4ee18
HB		 2016 if (!PHANDLE_VALID(isa))
2017 return;
2018
980a6513
BH		 2019 if (prom_getproplen(isa, "ranges") != 12)
2020 return;
54f4ee18
HB		 2021 if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges))
2022 == PROM_ERROR)
2023 return;
2024
2025 if (isa_ranges[0] != 0x1 ||
2026 isa_ranges[1] != 0xf4000000 ||
2027 isa_ranges[2] != 0x00010000)
2028 return;
2029
980a6513 2030 prom_printf("Fixing up bogus ISA range on Maple/Apache...\n");
54f4ee18
HB		 2031
2032 isa_ranges[0] = 0x1;
2033 isa_ranges[1] = 0x0;
980a6513 2034 isa_ranges[2] = rloc;
54f4ee18
HB		 2035 isa_ranges[3] = 0x0;
2036 isa_ranges[4] = 0x0;
2037 isa_ranges[5] = 0x00010000;
980a6513 2038 prom_setprop(isa, name, "ranges",
54f4ee18
HB		 2039 isa_ranges, sizeof(isa_ranges));
2040}
8f101a05
HC		 2041
2042#define CPC925_MC_START 0xf8000000
2043#define CPC925_MC_LENGTH 0x1000000
2044/* The values for memory-controller don't have right number of cells */
2045static void __init fixup_device_tree_maple_memory_controller(void)
2046{
2047 phandle mc;
2048 u32 mc_reg[4];
2049 char *name = "/hostbridge@f8000000";
2050 struct prom_t *_prom = &RELOC(prom);
2051 u32 ac, sc;
2052
2053 mc = call_prom("finddevice", 1, 1, ADDR(name));
2054 if (!PHANDLE_VALID(mc))
2055 return;
2056
2057 if (prom_getproplen(mc, "reg") != 8)
2058 return;
2059
2060 prom_getprop(_prom->root, "#address-cells", &ac, sizeof(ac));
2061 prom_getprop(_prom->root, "#size-cells", &sc, sizeof(sc));
2062 if ((ac != 2) || (sc != 2))
2063 return;
2064
2065 if (prom_getprop(mc, "reg", mc_reg, sizeof(mc_reg)) == PROM_ERROR)
2066 return;
2067
2068 if (mc_reg[0] != CPC925_MC_START || mc_reg[1] != CPC925_MC_LENGTH)
2069 return;
2070
2071 prom_printf("Fixing up bogus hostbridge on Maple...\n");
2072
2073 mc_reg[0] = 0x0;
2074 mc_reg[1] = CPC925_MC_START;
2075 mc_reg[2] = 0x0;
2076 mc_reg[3] = CPC925_MC_LENGTH;
2077 prom_setprop(mc, name, "reg", mc_reg, sizeof(mc_reg));
2078}
54f4ee18
HB		 2079#else
2080#define fixup_device_tree_maple()
8f101a05 2081#define fixup_device_tree_maple_memory_controller()
54f4ee18
HB		 2082#endif
2083
e8c0acf9 2084#ifdef CONFIG_PPC_CHRP
e4805922
OH		 2085/*
2086 * Pegasos and BriQ lacks the "ranges" property in the isa node
2087 * Pegasos needs decimal IRQ 14/15, not hexadecimal
556ecf9b 2088 * Pegasos has the IDE configured in legacy mode, but advertised as native
e4805922 2089 */
e8c0acf9
BH		 2090static void __init fixup_device_tree_chrp(void)
2091{
e4805922
OH		 2092 phandle ph;
2093 u32 prop[6];
26c5032e 2094 u32 rloc = 0x01006000; /* IO space; PCI device = 12 */
e8c0acf9
BH		 2095 char *name;
2096 int rc;
2097
2098 name = "/pci@80000000/isa@c";
e4805922
OH		 2099 ph = call_prom("finddevice", 1, 1, ADDR(name));
2100 if (!PHANDLE_VALID(ph)) {
26c5032e 2101 name = "/pci@ff500000/isa@6";
e4805922 2102 ph = call_prom("finddevice", 1, 1, ADDR(name));
26c5032e
BH		 2103 rloc = 0x01003000; /* IO space; PCI device = 6 */
2104 }
e4805922
OH		 2105 if (PHANDLE_VALID(ph)) {
2106 rc = prom_getproplen(ph, "ranges");
2107 if (rc == 0 || rc == PROM_ERROR) {
2108 prom_printf("Fixing up missing ISA range on Pegasos...\n");
2109
2110 prop[0] = 0x1;
2111 prop[1] = 0x0;
2112 prop[2] = rloc;
2113 prop[3] = 0x0;
2114 prop[4] = 0x0;
2115 prop[5] = 0x00010000;
2116 prom_setprop(ph, name, "ranges", prop, sizeof(prop));
2117 }
2118 }
e8c0acf9 2119
e4805922
OH		 2120 name = "/pci@80000000/ide@C,1";
2121 ph = call_prom("finddevice", 1, 1, ADDR(name));
2122 if (PHANDLE_VALID(ph)) {
2123 prom_printf("Fixing up IDE interrupt on Pegasos...\n");
2124 prop[0] = 14;
2125 prop[1] = 0x0;
556ecf9b
OH		 2126 prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32));
2127 prom_printf("Fixing up IDE class-code on Pegasos...\n");
2128 rc = prom_getprop(ph, "class-code", prop, sizeof(u32));
2129 if (rc == sizeof(u32)) {
2130 prop[0] &= ~0x5;
2131 prom_setprop(ph, name, "class-code", prop, sizeof(u32));
2132 }
e4805922 2133 }
e8c0acf9
BH		 2134}
2135#else
2136#define fixup_device_tree_chrp()
2137#endif
2138
9b6b563c 2139#if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC)
54f4ee18
HB		 2140static void __init fixup_device_tree_pmac(void)
2141{
9b6b563c
PM		 2142 phandle u3, i2c, mpic;
2143 u32 u3_rev;
2144 u32 interrupts[2];
2145 u32 parent;
2146
2147 /* Some G5s have a missing interrupt definition, fix it up here */
2148 u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000"));
2149 if (!PHANDLE_VALID(u3))
2150 return;
2151 i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000"));
2152 if (!PHANDLE_VALID(i2c))
2153 return;
2154 mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000"));
2155 if (!PHANDLE_VALID(mpic))
2156 return;
2157
2158 /* check if proper rev of u3 */
2159 if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev))
2160 == PROM_ERROR)
2161 return;
7d49697e 2162 if (u3_rev < 0x35 || u3_rev > 0x39)
9b6b563c
PM		 2163 return;
2164 /* does it need fixup ? */
2165 if (prom_getproplen(i2c, "interrupts") > 0)
2166 return;
2167
2168 prom_printf("fixing up bogus interrupts for u3 i2c...\n");
2169
2170 /* interrupt on this revision of u3 is number 0 and level */
2171 interrupts[0] = 0;
2172 interrupts[1] = 1;
a23414be
PM		 2173 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts",
2174 &interrupts, sizeof(interrupts));
9b6b563c 2175 parent = (u32)mpic;
a23414be
PM		 2176 prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent",
2177 &parent, sizeof(parent));
9b6b563c 2178}
54f4ee18
HB		 2179#else
2180#define fixup_device_tree_pmac()
2181#endif
9b6b563c 2182
88fd2a9d 2183#ifdef CONFIG_PPC_EFIKA
94d2dde7
GL		 2184/*
2185 * The MPC5200 FEC driver requires an phy-handle property to tell it how
2186 * to talk to the phy. If the phy-handle property is missing, then this
2187 * function is called to add the appropriate nodes and link it to the
2188 * ethernet node.
2189 */
2190static void __init fixup_device_tree_efika_add_phy(void)
88fd2a9d 2191{
88fd2a9d
SM		 2192 u32 node;
2193 char prop[64];
94d2dde7 2194 int rv;
88fd2a9d 2195
94d2dde7
GL		 2196 /* Check if /builtin/ethernet exists - bail if it doesn't */
2197 node = call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet"));
88fd2a9d
SM		 2198 if (!PHANDLE_VALID(node))
2199 return;
2200
94d2dde7
GL		 2201 /* Check if the phy-handle property exists - bail if it does */
2202 rv = prom_getprop(node, "phy-handle", prop, sizeof(prop));
2203 if (!rv)
88fd2a9d
SM		 2204 return;
2205
94d2dde7
GL		 2206 /*
2207 * At this point the ethernet device doesn't have a phy described.
2208 * Now we need to add the missing phy node and linkage
2209 */
6f4347c9 2210
94d2dde7 2211 /* Check for an MDIO bus node - if missing then create one */
6f4347c9
OH		 2212 node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio"));
2213 if (!PHANDLE_VALID(node)) {
2214 prom_printf("Adding Ethernet MDIO node\n");
2215 call_prom("interpret", 1, 1,
2216 " s\" /builtin\" find-device"
2217 " new-device"
2218 " 1 encode-int s\" #address-cells\" property"
2219 " 0 encode-int s\" #size-cells\" property"
94d2dde7
GL		 2220 " s\" mdio\" device-name"
2221 " s\" fsl,mpc5200b-mdio\" encode-string"
6f4347c9
OH		 2222 " s\" compatible\" property"
2223 " 0xf0003000 0x400 reg"
2224 " 0x2 encode-int"
2225 " 0x5 encode-int encode+"
2226 " 0x3 encode-int encode+"
2227 " s\" interrupts\" property"
2228 " finish-device");
2229 };
2230
94d2dde7
GL		 2231 /* Check for a PHY device node - if missing then create one and
2232 * give it's phandle to the ethernet node */
2233 node = call_prom("finddevice", 1, 1,
2234 ADDR("/builtin/mdio/ethernet-phy"));
6f4347c9
OH		 2235 if (!PHANDLE_VALID(node)) {
2236 prom_printf("Adding Ethernet PHY node\n");
2237 call_prom("interpret", 1, 1,
2238 " s\" /builtin/mdio\" find-device"
2239 " new-device"
2240 " s\" ethernet-phy\" device-name"
2241 " 0x10 encode-int s\" reg\" property"
2242 " my-self"
2243 " ihandle>phandle"
2244 " finish-device"
2245 " s\" /builtin/ethernet\" find-device"
2246 " encode-int"
2247 " s\" phy-handle\" property"
2248 " device-end");
2249 }
94d2dde7
GL		 2250}
2251
2252static void __init fixup_device_tree_efika(void)
2253{
2254 int sound_irq[3] = { 2, 2, 0 };
2255 int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0,
2256 3,4,0, 3,5,0, 3,6,0, 3,7,0,
2257 3,8,0, 3,9,0, 3,10,0, 3,11,0,
2258 3,12,0, 3,13,0, 3,14,0, 3,15,0 };
2259 u32 node;
2260 char prop[64];
2261 int rv, len;
2262
2263 /* Check if we're really running on a EFIKA */
2264 node = call_prom("finddevice", 1, 1, ADDR("/"));
2265 if (!PHANDLE_VALID(node))
2266 return;
2267
2268 rv = prom_getprop(node, "model", prop, sizeof(prop));
2269 if (rv == PROM_ERROR)
2270 return;
2271 if (strcmp(prop, "EFIKA5K2"))
2272 return;
2273
2274 prom_printf("Applying EFIKA device tree fixups\n");
2275
2276 /* Claiming to be 'chrp' is death */
2277 node = call_prom("finddevice", 1, 1, ADDR("/"));
2278 rv = prom_getprop(node, "device_type", prop, sizeof(prop));
2279 if (rv != PROM_ERROR && (strcmp(prop, "chrp") == 0))
2280 prom_setprop(node, "/", "device_type", "efika", sizeof("efika"));
2281
7f4392cd
DW		 2282 /* CODEGEN,description is exposed in /proc/cpuinfo so
2283 fix that too */
2284 rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop));
2285 if (rv != PROM_ERROR && (strstr(prop, "CHRP")))
2286 prom_setprop(node, "/", "CODEGEN,description",
2287 "Efika 5200B PowerPC System",
2288 sizeof("Efika 5200B PowerPC System"));
2289
94d2dde7
GL		 2290 /* Fixup bestcomm interrupts property */
2291 node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm"));
2292 if (PHANDLE_VALID(node)) {
2293 len = prom_getproplen(node, "interrupts");
2294 if (len == 12) {
2295 prom_printf("Fixing bestcomm interrupts property\n");
2296 prom_setprop(node, "/builtin/bestcom", "interrupts",
2297 bcomm_irq, sizeof(bcomm_irq));
2298 }
2299 }
2300
2301 /* Fixup sound interrupts property */
2302 node = call_prom("finddevice", 1, 1, ADDR("/builtin/sound"));
2303 if (PHANDLE_VALID(node)) {
2304 rv = prom_getprop(node, "interrupts", prop, sizeof(prop));
2305 if (rv == PROM_ERROR) {
2306 prom_printf("Adding sound interrupts property\n");
2307 prom_setprop(node, "/builtin/sound", "interrupts",
2308 sound_irq, sizeof(sound_irq));
2309 }
2310 }
6f4347c9 2311
94d2dde7
GL		 2312 /* Make sure ethernet phy-handle property exists */
2313 fixup_device_tree_efika_add_phy();
88fd2a9d
SM		 2314}
2315#else
2316#define fixup_device_tree_efika()
2317#endif
2318
54f4ee18
HB		 2319static void __init fixup_device_tree(void)
2320{
2321 fixup_device_tree_maple();
8f101a05 2322 fixup_device_tree_maple_memory_controller();
e8c0acf9 2323 fixup_device_tree_chrp();
54f4ee18 2324 fixup_device_tree_pmac();
88fd2a9d 2325 fixup_device_tree_efika();
54f4ee18 2326}
9b6b563c
PM		 2327
2328static void __init prom_find_boot_cpu(void)
2329{
e788ff13 2330 struct prom_t *_prom = &RELOC(prom);
9b6b563c
PM		 2331 u32 getprop_rval;
2332 ihandle prom_cpu;
2333 phandle cpu_pkg;
2334
a575b807 2335 _prom->cpu = 0;
9b6b563c 2336 if (prom_getprop(_prom->chosen, "cpu", &prom_cpu, sizeof(prom_cpu)) <= 0)
a575b807 2337 return;
9b6b563c
PM		 2338
2339 cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu);
2340
2341 prom_getprop(cpu_pkg, "reg", &getprop_rval, sizeof(getprop_rval));
2342 _prom->cpu = getprop_rval;
2343
2344 prom_debug("Booting CPU hw index = 0x%x\n", _prom->cpu);
2345}
2346
2347static void __init prom_check_initrd(unsigned long r3, unsigned long r4)
2348{
2349#ifdef CONFIG_BLK_DEV_INITRD
e788ff13 2350 struct prom_t *_prom = &RELOC(prom);
9b6b563c
PM		 2351
2352 if (r3 && r4 && r4 != 0xdeadbeef) {
2353 unsigned long val;
2354
51fae6de 2355 RELOC(prom_initrd_start) = is_kernel_addr(r3) ? __pa(r3) : r3;
9b6b563c
PM		 2356 RELOC(prom_initrd_end) = RELOC(prom_initrd_start) + r4;
2357
2358 val = RELOC(prom_initrd_start);
a23414be
PM		 2359 prom_setprop(_prom->chosen, "/chosen", "linux,initrd-start",
2360 &val, sizeof(val));
9b6b563c 2361 val = RELOC(prom_initrd_end);
a23414be
PM		 2362 prom_setprop(_prom->chosen, "/chosen", "linux,initrd-end",
2363 &val, sizeof(val));
9b6b563c
PM		 2364
2365 reserve_mem(RELOC(prom_initrd_start),
2366 RELOC(prom_initrd_end) - RELOC(prom_initrd_start));
2367
2368 prom_debug("initrd_start=0x%x\n", RELOC(prom_initrd_start));
2369 prom_debug("initrd_end=0x%x\n", RELOC(prom_initrd_end));
2370 }
2371#endif /* CONFIG_BLK_DEV_INITRD */
2372}
2373
2374/*
2375 * We enter here early on, when the Open Firmware prom is still
2376 * handling exceptions and the MMU hash table for us.
2377 */
2378
2379unsigned long __init prom_init(unsigned long r3, unsigned long r4,
2380 unsigned long pp,
549e8152
PM		 2381 unsigned long r6, unsigned long r7,
2382 unsigned long kbase)
9b6b563c 2383{
e788ff13 2384 struct prom_t *_prom;
9b6b563c 2385 unsigned long hdr;
9b6b563c
PM		 2386
2387#ifdef CONFIG_PPC32
549e8152 2388 unsigned long offset = reloc_offset();
9b6b563c
PM		 2389 reloc_got2(offset);
2390#endif
2391
2392 _prom = &RELOC(prom);
2393
2394 /*
2395 * First zero the BSS
2396 */
2397 memset(&RELOC(__bss_start), 0, __bss_stop - __bss_start);
2398
2399 /*
2400 * Init interface to Open Firmware, get some node references,
2401 * like /chosen
2402 */
2403 prom_init_client_services(pp);
2404
2405 /*
a23414be
PM		 2406 * See if this OF is old enough that we need to do explicit maps
2407 * and other workarounds
9b6b563c 2408 */
a23414be 2409 prom_find_mmu();
9b6b563c 2410
a575b807 2411 /*
a23414be 2412 * Init prom stdout device
a575b807 2413 */
a23414be 2414 prom_init_stdout();
a575b807 2415
151a9f4a 2416 prom_printf("Preparing to boot %s", RELOC(linux_banner));
e7943fbb 2417
9b6b563c
PM		 2418 /*
2419 * Get default machine type. At this point, we do not differentiate
2420 * between pSeries SMP and pSeries LPAR
2421 */
2422 RELOC(of_platform) = prom_find_machine_type();
9b6b563c 2423
549e8152 2424#ifndef CONFIG_RELOCATABLE
add60ef3
OH		 2425 /* Bail if this is a kdump kernel. */
2426 if (PHYSICAL_START > 0)
2427 prom_panic("Error: You can't boot a kdump kernel from OF!\n");
549e8152 2428#endif
add60ef3
OH		 2429
2430 /*
2431 * Check for an initrd
2432 */
2433 prom_check_initrd(r3, r4);
2434
9b6b563c
PM		 2435#ifdef CONFIG_PPC_PSERIES
2436 /*
2437 * On pSeries, inform the firmware about our capabilities
2438 */
799d6046
PM		 2439 if (RELOC(of_platform) == PLATFORM_PSERIES ||
2440 RELOC(of_platform) == PLATFORM_PSERIES_LPAR)
9b6b563c
PM		 2441 prom_send_capabilities();
2442#endif
2443
9b6b563c 2444 /*
f3f66f59 2445 * Copy the CPU hold code
9b6b563c 2446 */
e788ff13 2447 if (RELOC(of_platform) != PLATFORM_POWERMAC)
549e8152 2448 copy_and_flush(0, kbase, 0x100, 0);
9b6b563c
PM		 2449
2450 /*
2451 * Do early parsing of command line
2452 */
2453 early_cmdline_parse();
2454
2455 /*
2456 * Initialize memory management within prom_init
2457 */
2458 prom_init_mem();
2459
2460 /*
2461 * Determine which cpu is actually running right _now_
2462 */
2463 prom_find_boot_cpu();
2464
2465 /*
2466 * Initialize display devices
2467 */
2468 prom_check_displays();
2469
2470#ifdef CONFIG_PPC64
2471 /*
2472 * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else
2473 * that uses the allocator, we need to make sure we get the top of memory
2474 * available for us here...
2475 */
2476 if (RELOC(of_platform) == PLATFORM_PSERIES)
2477 prom_initialize_tce_table();
2478#endif
2479
2480 /*
2481 * On non-powermacs, try to instantiate RTAS and puts all CPUs
2482 * in spin-loops. PowerMacs don't have a working RTAS and use
2483 * a different way to spin CPUs
2484 */
2485 if (RELOC(of_platform) != PLATFORM_POWERMAC) {
2486 prom_instantiate_rtas();
2487 prom_hold_cpus();
2488 }
2489
2490 /*
2491 * Fill in some infos for use by the kernel later on
2492 */
cf68787b
BK		 2493 if (RELOC(prom_memory_limit))
2494 prom_setprop(_prom->chosen, "/chosen", "linux,memory-limit",
2495 &RELOC(prom_memory_limit),
2496 sizeof(prom_memory_limit));
9b6b563c 2497#ifdef CONFIG_PPC64
165785e5 2498 if (RELOC(prom_iommu_off))
a23414be
PM		 2499 prom_setprop(_prom->chosen, "/chosen", "linux,iommu-off",
2500 NULL, 0);
9b6b563c 2501
165785e5 2502 if (RELOC(prom_iommu_force_on))
a23414be
PM		 2503 prom_setprop(_prom->chosen, "/chosen", "linux,iommu-force-on",
2504 NULL, 0);
9b6b563c
PM		 2505
2506 if (RELOC(prom_tce_alloc_start)) {
a23414be 2507 prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-start",
9b6b563c
PM		 2508 &RELOC(prom_tce_alloc_start),
2509 sizeof(prom_tce_alloc_start));
a23414be 2510 prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-end",
9b6b563c
PM		 2511 &RELOC(prom_tce_alloc_end),
2512 sizeof(prom_tce_alloc_end));
2513 }
2514#endif
2515
2516 /*
2517 * Fixup any known bugs in the device-tree
2518 */
2519 fixup_device_tree();
2520
2521 /*
2522 * Now finally create the flattened device-tree
2523 */
1f8737aa 2524 prom_printf("copying OF device tree...\n");
9b6b563c
PM		 2525 flatten_device_tree();
2526
3825ac0e
PM		 2527 /*
2528 * in case stdin is USB and still active on IBM machines...
2529 * Unfortunately quiesce crashes on some powermacs if we have
2530 * closed stdin already (in particular the powerbook 101).
2531 */
2532 if (RELOC(of_platform) != PLATFORM_POWERMAC)
2533 prom_close_stdin();
9b6b563c
PM		 2534
2535 /*
2536 * Call OF "quiesce" method to shut down pending DMA's from
2537 * devices etc...
2538 */
1f8737aa 2539 prom_printf("Calling quiesce...\n");
9b6b563c
PM		 2540 call_prom("quiesce", 0, 0);
2541
2542 /*
2543 * And finally, call the kernel passing it the flattened device
2544 * tree and NULL as r5, thus triggering the new entry point which
2545 * is common to us and kexec
2546 */
2547 hdr = RELOC(dt_header_start);
2548 prom_printf("returning from prom_init\n");
2549 prom_debug("->dt_header_start=0x%x\n", hdr);
2550
2551#ifdef CONFIG_PPC32
2552 reloc_got2(-offset);
2553#endif
2554
549e8152 2555 __start(hdr, kbase, 0);
9b6b563c
PM		 2556
2557 return 0;
2558}
kernel source for telekom puls (alcatel/mediatek)