Commit | Line | Data |
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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> | |
9b6b563c PM |
38 | #include <asm/mmu.h> |
39 | #include <asm/pgtable.h> | |
9b6b563c | 40 | #include <asm/iommu.h> |
9b6b563c PM |
41 | #include <asm/btext.h> |
42 | #include <asm/sections.h> | |
43 | #include <asm/machdep.h> | |
27f44888 | 44 | #include <asm/opal.h> |
9b6b563c | 45 | |
9b6b563c | 46 | #include <linux/linux_logo.h> |
9b6b563c | 47 | |
9b6b563c PM |
48 | /* |
49 | * Eventually bump that one up | |
50 | */ | |
51 | #define DEVTREE_CHUNK_SIZE 0x100000 | |
52 | ||
53 | /* | |
54 | * This is the size of the local memory reserve map that gets copied | |
55 | * into the boot params passed to the kernel. That size is totally | |
56 | * flexible as the kernel just reads the list until it encounters an | |
57 | * entry with size 0, so it can be changed without breaking binary | |
58 | * compatibility | |
59 | */ | |
60 | #define MEM_RESERVE_MAP_SIZE 8 | |
61 | ||
62 | /* | |
63 | * prom_init() is called very early on, before the kernel text | |
64 | * and data have been mapped to KERNELBASE. At this point the code | |
65 | * is running at whatever address it has been loaded at. | |
66 | * On ppc32 we compile with -mrelocatable, which means that references | |
67 | * to extern and static variables get relocated automatically. | |
5ac47f7a AB |
68 | * ppc64 objects are always relocatable, we just need to relocate the |
69 | * TOC. | |
9b6b563c PM |
70 | * |
71 | * Because OF may have mapped I/O devices into the area starting at | |
72 | * KERNELBASE, particularly on CHRP machines, we can't safely call | |
73 | * OF once the kernel has been mapped to KERNELBASE. Therefore all | |
74 | * OF calls must be done within prom_init(). | |
75 | * | |
76 | * ADDR is used in calls to call_prom. The 4th and following | |
77 | * arguments to call_prom should be 32-bit values. | |
78 | * On ppc64, 64 bit values are truncated to 32 bits (and | |
79 | * fortunately don't get interpreted as two arguments). | |
80 | */ | |
5ac47f7a AB |
81 | #define ADDR(x) (u32)(unsigned long)(x) |
82 | ||
9b6b563c | 83 | #ifdef CONFIG_PPC64 |
a23414be | 84 | #define OF_WORKAROUNDS 0 |
9b6b563c | 85 | #else |
a23414be PM |
86 | #define OF_WORKAROUNDS of_workarounds |
87 | int of_workarounds; | |
9b6b563c PM |
88 | #endif |
89 | ||
a23414be PM |
90 | #define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */ |
91 | #define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */ | |
92 | ||
9b6b563c PM |
93 | #define PROM_BUG() do { \ |
94 | prom_printf("kernel BUG at %s line 0x%x!\n", \ | |
5827d416 | 95 | __FILE__, __LINE__); \ |
9b6b563c PM |
96 | __asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \ |
97 | } while (0) | |
98 | ||
99 | #ifdef DEBUG_PROM | |
100 | #define prom_debug(x...) prom_printf(x) | |
101 | #else | |
102 | #define prom_debug(x...) | |
103 | #endif | |
104 | ||
9b6b563c PM |
105 | |
106 | typedef u32 prom_arg_t; | |
107 | ||
108 | struct prom_args { | |
493adffc BH |
109 | __be32 service; |
110 | __be32 nargs; | |
111 | __be32 nret; | |
112 | __be32 args[10]; | |
9b6b563c PM |
113 | }; |
114 | ||
115 | struct prom_t { | |
116 | ihandle root; | |
a23414be | 117 | phandle chosen; |
9b6b563c PM |
118 | int cpu; |
119 | ihandle stdout; | |
a575b807 | 120 | ihandle mmumap; |
a23414be | 121 | ihandle memory; |
9b6b563c PM |
122 | }; |
123 | ||
124 | struct mem_map_entry { | |
493adffc BH |
125 | __be64 base; |
126 | __be64 size; | |
9b6b563c PM |
127 | }; |
128 | ||
493adffc | 129 | typedef __be32 cell_t; |
9b6b563c | 130 | |
6e35d5da BH |
131 | extern void __start(unsigned long r3, unsigned long r4, unsigned long r5, |
132 | unsigned long r6, unsigned long r7, unsigned long r8, | |
133 | unsigned long r9); | |
9b6b563c PM |
134 | |
135 | #ifdef CONFIG_PPC64 | |
c4988820 | 136 | extern int enter_prom(struct prom_args *args, unsigned long entry); |
9b6b563c | 137 | #else |
c4988820 | 138 | static inline int enter_prom(struct prom_args *args, unsigned long entry) |
9b6b563c | 139 | { |
c4988820 | 140 | return ((int (*)(struct prom_args *))entry)(args); |
9b6b563c PM |
141 | } |
142 | #endif | |
143 | ||
144 | extern void copy_and_flush(unsigned long dest, unsigned long src, | |
145 | unsigned long size, unsigned long offset); | |
146 | ||
147 | /* prom structure */ | |
148 | static struct prom_t __initdata prom; | |
149 | ||
150 | static unsigned long prom_entry __initdata; | |
151 | ||
152 | #define PROM_SCRATCH_SIZE 256 | |
153 | ||
154 | static char __initdata of_stdout_device[256]; | |
155 | static char __initdata prom_scratch[PROM_SCRATCH_SIZE]; | |
156 | ||
157 | static unsigned long __initdata dt_header_start; | |
158 | static unsigned long __initdata dt_struct_start, dt_struct_end; | |
159 | static unsigned long __initdata dt_string_start, dt_string_end; | |
160 | ||
161 | static unsigned long __initdata prom_initrd_start, prom_initrd_end; | |
162 | ||
163 | #ifdef CONFIG_PPC64 | |
165785e5 JK |
164 | static int __initdata prom_iommu_force_on; |
165 | static int __initdata prom_iommu_off; | |
9b6b563c PM |
166 | static unsigned long __initdata prom_tce_alloc_start; |
167 | static unsigned long __initdata prom_tce_alloc_end; | |
168 | #endif | |
169 | ||
e8222502 BH |
170 | /* Platforms codes are now obsolete in the kernel. Now only used within this |
171 | * file and ultimately gone too. Feel free to change them if you need, they | |
172 | * are not shared with anything outside of this file anymore | |
173 | */ | |
174 | #define PLATFORM_PSERIES 0x0100 | |
175 | #define PLATFORM_PSERIES_LPAR 0x0101 | |
176 | #define PLATFORM_LPAR 0x0001 | |
177 | #define PLATFORM_POWERMAC 0x0400 | |
178 | #define PLATFORM_GENERIC 0x0500 | |
27f44888 | 179 | #define PLATFORM_OPAL 0x0600 |
e8222502 | 180 | |
9b6b563c PM |
181 | static int __initdata of_platform; |
182 | ||
183 | static char __initdata prom_cmd_line[COMMAND_LINE_SIZE]; | |
184 | ||
cf68787b BK |
185 | static unsigned long __initdata prom_memory_limit; |
186 | ||
9b6b563c PM |
187 | static unsigned long __initdata alloc_top; |
188 | static unsigned long __initdata alloc_top_high; | |
189 | static unsigned long __initdata alloc_bottom; | |
190 | static unsigned long __initdata rmo_top; | |
191 | static unsigned long __initdata ram_top; | |
192 | ||
193 | static struct mem_map_entry __initdata mem_reserve_map[MEM_RESERVE_MAP_SIZE]; | |
194 | static int __initdata mem_reserve_cnt; | |
195 | ||
196 | static cell_t __initdata regbuf[1024]; | |
197 | ||
dbe78b40 BH |
198 | static bool rtas_has_query_cpu_stopped; |
199 | ||
9b6b563c | 200 | |
9b6b563c PM |
201 | /* |
202 | * Error results ... some OF calls will return "-1" on error, some | |
203 | * will return 0, some will return either. To simplify, here are | |
204 | * macros to use with any ihandle or phandle return value to check if | |
205 | * it is valid | |
206 | */ | |
207 | ||
208 | #define PROM_ERROR (-1u) | |
209 | #define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR) | |
210 | #define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR) | |
211 | ||
212 | ||
213 | /* This is the one and *ONLY* place where we actually call open | |
214 | * firmware. | |
215 | */ | |
216 | ||
217 | static int __init call_prom(const char *service, int nargs, int nret, ...) | |
218 | { | |
219 | int i; | |
220 | struct prom_args args; | |
221 | va_list list; | |
222 | ||
493adffc BH |
223 | args.service = cpu_to_be32(ADDR(service)); |
224 | args.nargs = cpu_to_be32(nargs); | |
225 | args.nret = cpu_to_be32(nret); | |
9b6b563c PM |
226 | |
227 | va_start(list, nret); | |
228 | for (i = 0; i < nargs; i++) | |
493adffc | 229 | args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t)); |
9b6b563c PM |
230 | va_end(list); |
231 | ||
232 | for (i = 0; i < nret; i++) | |
233 | args.args[nargs+i] = 0; | |
234 | ||
5827d416 | 235 | if (enter_prom(&args, prom_entry) < 0) |
c4988820 | 236 | return PROM_ERROR; |
9b6b563c | 237 | |
493adffc | 238 | return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0; |
9b6b563c PM |
239 | } |
240 | ||
241 | static int __init call_prom_ret(const char *service, int nargs, int nret, | |
242 | prom_arg_t *rets, ...) | |
243 | { | |
244 | int i; | |
245 | struct prom_args args; | |
246 | va_list list; | |
247 | ||
493adffc BH |
248 | args.service = cpu_to_be32(ADDR(service)); |
249 | args.nargs = cpu_to_be32(nargs); | |
250 | args.nret = cpu_to_be32(nret); | |
9b6b563c PM |
251 | |
252 | va_start(list, rets); | |
253 | for (i = 0; i < nargs; i++) | |
493adffc | 254 | args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t)); |
9b6b563c PM |
255 | va_end(list); |
256 | ||
257 | for (i = 0; i < nret; i++) | |
ed1189b7 | 258 | args.args[nargs+i] = 0; |
9b6b563c | 259 | |
5827d416 | 260 | if (enter_prom(&args, prom_entry) < 0) |
c4988820 | 261 | return PROM_ERROR; |
9b6b563c PM |
262 | |
263 | if (rets != NULL) | |
264 | for (i = 1; i < nret; ++i) | |
493adffc | 265 | rets[i-1] = be32_to_cpu(args.args[nargs+i]); |
9b6b563c | 266 | |
493adffc | 267 | return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0; |
9b6b563c PM |
268 | } |
269 | ||
270 | ||
9b6b563c PM |
271 | static void __init prom_print(const char *msg) |
272 | { | |
273 | const char *p, *q; | |
9b6b563c | 274 | |
5827d416 | 275 | if (prom.stdout == 0) |
9b6b563c PM |
276 | return; |
277 | ||
278 | for (p = msg; *p != 0; p = q) { | |
279 | for (q = p; *q != 0 && *q != '\n'; ++q) | |
280 | ; | |
281 | if (q > p) | |
5827d416 | 282 | call_prom("write", 3, 1, prom.stdout, p, q - p); |
9b6b563c PM |
283 | if (*q == 0) |
284 | break; | |
285 | ++q; | |
5827d416 | 286 | call_prom("write", 3, 1, prom.stdout, ADDR("\r\n"), 2); |
9b6b563c PM |
287 | } |
288 | } | |
289 | ||
290 | ||
291 | static void __init prom_print_hex(unsigned long val) | |
292 | { | |
293 | int i, nibbles = sizeof(val)*2; | |
294 | char buf[sizeof(val)*2+1]; | |
9b6b563c PM |
295 | |
296 | for (i = nibbles-1; i >= 0; i--) { | |
297 | buf[i] = (val & 0xf) + '0'; | |
298 | if (buf[i] > '9') | |
299 | buf[i] += ('a'-'0'-10); | |
300 | val >>= 4; | |
301 | } | |
302 | buf[nibbles] = '\0'; | |
5827d416 | 303 | call_prom("write", 3, 1, prom.stdout, buf, nibbles); |
9b6b563c PM |
304 | } |
305 | ||
2c48a7d6 MN |
306 | /* max number of decimal digits in an unsigned long */ |
307 | #define UL_DIGITS 21 | |
308 | static void __init prom_print_dec(unsigned long val) | |
309 | { | |
310 | int i, size; | |
311 | char buf[UL_DIGITS+1]; | |
2c48a7d6 MN |
312 | |
313 | for (i = UL_DIGITS-1; i >= 0; i--) { | |
314 | buf[i] = (val % 10) + '0'; | |
315 | val = val/10; | |
316 | if (val == 0) | |
317 | break; | |
318 | } | |
319 | /* shift stuff down */ | |
320 | size = UL_DIGITS - i; | |
5827d416 | 321 | call_prom("write", 3, 1, prom.stdout, buf+i, size); |
2c48a7d6 | 322 | } |
9b6b563c PM |
323 | |
324 | static void __init prom_printf(const char *format, ...) | |
325 | { | |
326 | const char *p, *q, *s; | |
327 | va_list args; | |
328 | unsigned long v; | |
af277149 | 329 | long vs; |
9b6b563c PM |
330 | |
331 | va_start(args, format); | |
9b6b563c PM |
332 | for (p = format; *p != 0; p = q) { |
333 | for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q) | |
334 | ; | |
335 | if (q > p) | |
5827d416 | 336 | call_prom("write", 3, 1, prom.stdout, p, q - p); |
9b6b563c PM |
337 | if (*q == 0) |
338 | break; | |
339 | if (*q == '\n') { | |
340 | ++q; | |
5827d416 | 341 | call_prom("write", 3, 1, prom.stdout, |
9b6b563c PM |
342 | ADDR("\r\n"), 2); |
343 | continue; | |
344 | } | |
345 | ++q; | |
346 | if (*q == 0) | |
347 | break; | |
348 | switch (*q) { | |
349 | case 's': | |
350 | ++q; | |
351 | s = va_arg(args, const char *); | |
352 | prom_print(s); | |
353 | break; | |
354 | case 'x': | |
355 | ++q; | |
356 | v = va_arg(args, unsigned long); | |
357 | prom_print_hex(v); | |
358 | break; | |
af277149 BH |
359 | case 'd': |
360 | ++q; | |
361 | vs = va_arg(args, int); | |
362 | if (vs < 0) { | |
5827d416 | 363 | prom_print("-"); |
af277149 BH |
364 | vs = -vs; |
365 | } | |
366 | prom_print_dec(vs); | |
367 | break; | |
2c48a7d6 MN |
368 | case 'l': |
369 | ++q; | |
af277149 BH |
370 | if (*q == 0) |
371 | break; | |
372 | else if (*q == 'x') { | |
373 | ++q; | |
374 | v = va_arg(args, unsigned long); | |
375 | prom_print_hex(v); | |
376 | } else if (*q == 'u') { /* '%lu' */ | |
2c48a7d6 MN |
377 | ++q; |
378 | v = va_arg(args, unsigned long); | |
379 | prom_print_dec(v); | |
af277149 BH |
380 | } else if (*q == 'd') { /* %ld */ |
381 | ++q; | |
382 | vs = va_arg(args, long); | |
383 | if (vs < 0) { | |
5827d416 | 384 | prom_print("-"); |
af277149 BH |
385 | vs = -vs; |
386 | } | |
387 | prom_print_dec(vs); | |
2c48a7d6 MN |
388 | } |
389 | break; | |
9b6b563c PM |
390 | } |
391 | } | |
1b855e16 | 392 | va_end(args); |
9b6b563c PM |
393 | } |
394 | ||
395 | ||
a575b807 PM |
396 | static unsigned int __init prom_claim(unsigned long virt, unsigned long size, |
397 | unsigned long align) | |
398 | { | |
a575b807 | 399 | |
a23414be PM |
400 | if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) { |
401 | /* | |
402 | * Old OF requires we claim physical and virtual separately | |
403 | * and then map explicitly (assuming virtual mode) | |
404 | */ | |
405 | int ret; | |
406 | prom_arg_t result; | |
407 | ||
408 | ret = call_prom_ret("call-method", 5, 2, &result, | |
5827d416 | 409 | ADDR("claim"), prom.memory, |
a23414be PM |
410 | align, size, virt); |
411 | if (ret != 0 || result == -1) | |
412 | return -1; | |
413 | ret = call_prom_ret("call-method", 5, 2, &result, | |
5827d416 | 414 | ADDR("claim"), prom.mmumap, |
a23414be PM |
415 | align, size, virt); |
416 | if (ret != 0) { | |
417 | call_prom("call-method", 4, 1, ADDR("release"), | |
5827d416 | 418 | prom.memory, size, virt); |
a23414be PM |
419 | return -1; |
420 | } | |
421 | /* the 0x12 is M (coherence) + PP == read/write */ | |
a575b807 | 422 | call_prom("call-method", 6, 1, |
5827d416 | 423 | ADDR("map"), prom.mmumap, 0x12, size, virt, virt); |
a23414be PM |
424 | return virt; |
425 | } | |
426 | return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size, | |
427 | (prom_arg_t)align); | |
a575b807 PM |
428 | } |
429 | ||
9b6b563c PM |
430 | static void __init __attribute__((noreturn)) prom_panic(const char *reason) |
431 | { | |
9b6b563c | 432 | prom_print(reason); |
add60ef3 OH |
433 | /* Do not call exit because it clears the screen on pmac |
434 | * it also causes some sort of double-fault on early pmacs */ | |
5827d416 | 435 | if (of_platform == PLATFORM_POWERMAC) |
add60ef3 OH |
436 | asm("trap\n"); |
437 | ||
1d9a4731 | 438 | /* ToDo: should put up an SRC here on pSeries */ |
9b6b563c PM |
439 | call_prom("exit", 0, 0); |
440 | ||
441 | for (;;) /* should never get here */ | |
442 | ; | |
443 | } | |
444 | ||
445 | ||
446 | static int __init prom_next_node(phandle *nodep) | |
447 | { | |
448 | phandle node; | |
449 | ||
450 | if ((node = *nodep) != 0 | |
451 | && (*nodep = call_prom("child", 1, 1, node)) != 0) | |
452 | return 1; | |
453 | if ((*nodep = call_prom("peer", 1, 1, node)) != 0) | |
454 | return 1; | |
455 | for (;;) { | |
456 | if ((node = call_prom("parent", 1, 1, node)) == 0) | |
457 | return 0; | |
458 | if ((*nodep = call_prom("peer", 1, 1, node)) != 0) | |
459 | return 1; | |
460 | } | |
461 | } | |
462 | ||
21fe3301 | 463 | static int inline prom_getprop(phandle node, const char *pname, |
9b6b563c PM |
464 | void *value, size_t valuelen) |
465 | { | |
466 | return call_prom("getprop", 4, 1, node, ADDR(pname), | |
467 | (u32)(unsigned long) value, (u32) valuelen); | |
468 | } | |
469 | ||
21fe3301 | 470 | static int inline prom_getproplen(phandle node, const char *pname) |
9b6b563c PM |
471 | { |
472 | return call_prom("getproplen", 2, 1, node, ADDR(pname)); | |
473 | } | |
474 | ||
a23414be | 475 | static void add_string(char **str, const char *q) |
9b6b563c | 476 | { |
a23414be PM |
477 | char *p = *str; |
478 | ||
479 | while (*q) | |
480 | *p++ = *q++; | |
481 | *p++ = ' '; | |
482 | *str = p; | |
483 | } | |
484 | ||
485 | static char *tohex(unsigned int x) | |
486 | { | |
487 | static char digits[] = "0123456789abcdef"; | |
488 | static char result[9]; | |
489 | int i; | |
490 | ||
491 | result[8] = 0; | |
492 | i = 8; | |
493 | do { | |
494 | --i; | |
495 | result[i] = digits[x & 0xf]; | |
496 | x >>= 4; | |
497 | } while (x != 0 && i > 0); | |
498 | return &result[i]; | |
499 | } | |
500 | ||
501 | static int __init prom_setprop(phandle node, const char *nodename, | |
502 | const char *pname, void *value, size_t valuelen) | |
503 | { | |
504 | char cmd[256], *p; | |
505 | ||
506 | if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL)) | |
507 | return call_prom("setprop", 4, 1, node, ADDR(pname), | |
508 | (u32)(unsigned long) value, (u32) valuelen); | |
509 | ||
510 | /* gah... setprop doesn't work on longtrail, have to use interpret */ | |
511 | p = cmd; | |
512 | add_string(&p, "dev"); | |
513 | add_string(&p, nodename); | |
514 | add_string(&p, tohex((u32)(unsigned long) value)); | |
515 | add_string(&p, tohex(valuelen)); | |
516 | add_string(&p, tohex(ADDR(pname))); | |
5827d416 | 517 | add_string(&p, tohex(strlen(pname))); |
a23414be PM |
518 | add_string(&p, "property"); |
519 | *p = 0; | |
520 | return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd); | |
9b6b563c PM |
521 | } |
522 | ||
5827d416 | 523 | /* We can't use the standard versions because of relocation headaches. */ |
cf68787b BK |
524 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ |
525 | || ('a' <= (c) && (c) <= 'f') \ | |
526 | || ('A' <= (c) && (c) <= 'F')) | |
527 | ||
528 | #define isdigit(c) ('0' <= (c) && (c) <= '9') | |
529 | #define islower(c) ('a' <= (c) && (c) <= 'z') | |
530 | #define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c)) | |
531 | ||
493adffc | 532 | static unsigned long prom_strtoul(const char *cp, const char **endp) |
cf68787b BK |
533 | { |
534 | unsigned long result = 0, base = 10, value; | |
535 | ||
536 | if (*cp == '0') { | |
537 | base = 8; | |
538 | cp++; | |
539 | if (toupper(*cp) == 'X') { | |
540 | cp++; | |
541 | base = 16; | |
542 | } | |
543 | } | |
544 | ||
545 | while (isxdigit(*cp) && | |
546 | (value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) { | |
547 | result = result * base + value; | |
548 | cp++; | |
549 | } | |
550 | ||
551 | if (endp) | |
552 | *endp = cp; | |
553 | ||
554 | return result; | |
555 | } | |
556 | ||
493adffc | 557 | static unsigned long prom_memparse(const char *ptr, const char **retptr) |
cf68787b BK |
558 | { |
559 | unsigned long ret = prom_strtoul(ptr, retptr); | |
560 | int shift = 0; | |
561 | ||
562 | /* | |
563 | * We can't use a switch here because GCC *may* generate a | |
564 | * jump table which won't work, because we're not running at | |
565 | * the address we're linked at. | |
566 | */ | |
567 | if ('G' == **retptr || 'g' == **retptr) | |
568 | shift = 30; | |
569 | ||
570 | if ('M' == **retptr || 'm' == **retptr) | |
571 | shift = 20; | |
572 | ||
573 | if ('K' == **retptr || 'k' == **retptr) | |
574 | shift = 10; | |
575 | ||
576 | if (shift) { | |
577 | ret <<= shift; | |
578 | (*retptr)++; | |
579 | } | |
580 | ||
581 | return ret; | |
582 | } | |
583 | ||
9b6b563c PM |
584 | /* |
585 | * Early parsing of the command line passed to the kernel, used for | |
586 | * "mem=x" and the options that affect the iommu | |
587 | */ | |
588 | static void __init early_cmdline_parse(void) | |
589 | { | |
cc5d0189 | 590 | const char *opt; |
cf68787b | 591 | |
cc5d0189 | 592 | char *p; |
9b6b563c PM |
593 | int l = 0; |
594 | ||
5827d416 AB |
595 | prom_cmd_line[0] = 0; |
596 | p = prom_cmd_line; | |
597 | if ((long)prom.chosen > 0) | |
598 | l = prom_getprop(prom.chosen, "bootargs", p, COMMAND_LINE_SIZE-1); | |
9b6b563c | 599 | #ifdef CONFIG_CMDLINE |
0e4aa9c2 | 600 | if (l <= 0 || p[0] == '\0') /* dbl check */ |
5827d416 AB |
601 | strlcpy(prom_cmd_line, |
602 | CONFIG_CMDLINE, sizeof(prom_cmd_line)); | |
9b6b563c | 603 | #endif /* CONFIG_CMDLINE */ |
5827d416 | 604 | prom_printf("command line: %s\n", prom_cmd_line); |
9b6b563c PM |
605 | |
606 | #ifdef CONFIG_PPC64 | |
5827d416 | 607 | opt = strstr(prom_cmd_line, "iommu="); |
9b6b563c PM |
608 | if (opt) { |
609 | prom_printf("iommu opt is: %s\n", opt); | |
610 | opt += 6; | |
611 | while (*opt && *opt == ' ') | |
612 | opt++; | |
5827d416 AB |
613 | if (!strncmp(opt, "off", 3)) |
614 | prom_iommu_off = 1; | |
615 | else if (!strncmp(opt, "force", 5)) | |
616 | prom_iommu_force_on = 1; | |
9b6b563c PM |
617 | } |
618 | #endif | |
5827d416 | 619 | opt = strstr(prom_cmd_line, "mem="); |
cf68787b BK |
620 | if (opt) { |
621 | opt += 4; | |
5827d416 | 622 | prom_memory_limit = prom_memparse(opt, (const char **)&opt); |
cf68787b BK |
623 | #ifdef CONFIG_PPC64 |
624 | /* Align to 16 MB == size of ppc64 large page */ | |
5827d416 | 625 | prom_memory_limit = ALIGN(prom_memory_limit, 0x1000000); |
cf68787b BK |
626 | #endif |
627 | } | |
9b6b563c PM |
628 | } |
629 | ||
27f44888 | 630 | #if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) |
9b6b563c | 631 | /* |
530b5e14 NF |
632 | * The architecture vector has an array of PVR mask/value pairs, |
633 | * followed by # option vectors - 1, followed by the option vectors. | |
634 | * | |
635 | * See prom.h for the definition of the bits specified in the | |
636 | * architecture vector. | |
f709bfac PM |
637 | * |
638 | * Because the description vector contains a mix of byte and word | |
639 | * values, we declare it as an unsigned char array, and use this | |
640 | * macro to put word values in. | |
641 | */ | |
642 | #define W(x) ((x) >> 24) & 0xff, ((x) >> 16) & 0xff, \ | |
643 | ((x) >> 8) & 0xff, (x) & 0xff | |
644 | ||
e8a4fd0a ME |
645 | /* Firmware expects the value to be n - 1, where n is the # of vectors */ |
646 | #define NUM_VECTORS(n) ((n) - 1) | |
647 | ||
648 | /* | |
649 | * Firmware expects 1 + n - 2, where n is the length of the option vector in | |
650 | * bytes. The 1 accounts for the length byte itself, the - 2 .. ? | |
651 | */ | |
652 | #define VECTOR_LENGTH(n) (1 + (n) - 2) | |
653 | ||
530b5e14 | 654 | unsigned char ibm_architecture_vec[] = { |
f709bfac | 655 | W(0xfffe0000), W(0x003a0000), /* POWER5/POWER5+ */ |
03054d51 | 656 | W(0xffff0000), W(0x003e0000), /* POWER6 */ |
e952e6c4 | 657 | W(0xffff0000), W(0x003f0000), /* POWER7 */ |
33959f88 MN |
658 | W(0xffff0000), W(0x004b0000), /* POWER8E */ |
659 | W(0xffff0000), W(0x004d0000), /* POWER8 */ | |
df77c799 | 660 | W(0xffffffff), W(0x0f000004), /* all 2.07-compliant */ |
0cb99013 | 661 | W(0xffffffff), W(0x0f000003), /* all 2.06-compliant */ |
0efbc18a | 662 | W(0xffffffff), W(0x0f000002), /* all 2.05-compliant */ |
f709bfac | 663 | W(0xfffffffe), W(0x0f000001), /* all 2.04-compliant and earlier */ |
e8a4fd0a | 664 | NUM_VECTORS(6), /* 6 option vectors */ |
f709bfac PM |
665 | |
666 | /* option vector 1: processor architectures supported */ | |
e8a4fd0a | 667 | VECTOR_LENGTH(2), /* length */ |
f709bfac PM |
668 | 0, /* don't ignore, don't halt */ |
669 | OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 | | |
df77c799 | 670 | OV1_PPC_2_04 | OV1_PPC_2_05 | OV1_PPC_2_06 | OV1_PPC_2_07, |
f709bfac PM |
671 | |
672 | /* option vector 2: Open Firmware options supported */ | |
e8a4fd0a | 673 | VECTOR_LENGTH(33), /* length */ |
f709bfac PM |
674 | OV2_REAL_MODE, |
675 | 0, 0, | |
676 | W(0xffffffff), /* real_base */ | |
677 | W(0xffffffff), /* real_size */ | |
678 | W(0xffffffff), /* virt_base */ | |
679 | W(0xffffffff), /* virt_size */ | |
680 | W(0xffffffff), /* load_base */ | |
33392640 | 681 | W(256), /* 256MB min RMA */ |
f709bfac PM |
682 | W(0xffffffff), /* full client load */ |
683 | 0, /* min RMA percentage of total RAM */ | |
684 | 48, /* max log_2(hash table size) */ | |
685 | ||
686 | /* option vector 3: processor options supported */ | |
e8a4fd0a | 687 | VECTOR_LENGTH(2), /* length */ |
f709bfac | 688 | 0, /* don't ignore, don't halt */ |
974a76f5 | 689 | OV3_FP | OV3_VMX | OV3_DFP, |
f709bfac PM |
690 | |
691 | /* option vector 4: IBM PAPR implementation */ | |
e8a4fd0a | 692 | VECTOR_LENGTH(2), /* length */ |
f709bfac | 693 | 0, /* don't halt */ |
404e32e4 | 694 | OV4_MIN_ENT_CAP, /* minimum VP entitled capacity */ |
f709bfac PM |
695 | |
696 | /* option vector 5: PAPR/OF options */ | |
e8a4fd0a | 697 | VECTOR_LENGTH(18), /* length */ |
f709bfac | 698 | 0, /* don't ignore, don't halt */ |
f0ff7eb4 NF |
699 | OV5_FEAT(OV5_LPAR) | OV5_FEAT(OV5_SPLPAR) | OV5_FEAT(OV5_LARGE_PAGES) | |
700 | OV5_FEAT(OV5_DRCONF_MEMORY) | OV5_FEAT(OV5_DONATE_DEDICATE_CPU) | | |
701 | #ifdef CONFIG_PCI_MSI | |
702 | /* PCIe/MSI support. Without MSI full PCIe is not supported */ | |
703 | OV5_FEAT(OV5_MSI), | |
704 | #else | |
705 | 0, | |
706 | #endif | |
8391e42a | 707 | 0, |
f0ff7eb4 NF |
708 | #ifdef CONFIG_PPC_SMLPAR |
709 | OV5_FEAT(OV5_CMO) | OV5_FEAT(OV5_XCMO), | |
710 | #else | |
711 | 0, | |
712 | #endif | |
1b1218d3 | 713 | OV5_FEAT(OV5_TYPE1_AFFINITY) | OV5_FEAT(OV5_PRRN), |
28bb9ee1 | 714 | 0, |
715 | 0, | |
716 | 0, | |
efec959f BH |
717 | /* WARNING: The offset of the "number of cores" field below |
718 | * must match by the macro below. Update the definition if | |
719 | * the structure layout changes. | |
720 | */ | |
33959f88 | 721 | #define IBM_ARCH_VEC_NRCORES_OFFSET 125 |
efec959f | 722 | W(NR_CPUS), /* number of cores supported */ |
828d2b59 KY |
723 | 0, |
724 | 0, | |
725 | 0, | |
726 | 0, | |
f0ff7eb4 NF |
727 | OV5_FEAT(OV5_PFO_HW_RNG) | OV5_FEAT(OV5_PFO_HW_ENCR) | |
728 | OV5_FEAT(OV5_PFO_HW_842), | |
729 | OV5_FEAT(OV5_SUB_PROCESSORS), | |
e8a4fd0a | 730 | |
28bb9ee1 | 731 | /* option vector 6: IBM PAPR hints */ |
e8a4fd0a | 732 | VECTOR_LENGTH(3), /* length */ |
28bb9ee1 | 733 | 0, |
734 | 0, | |
735 | OV6_LINUX, | |
f709bfac PM |
736 | }; |
737 | ||
493adffc BH |
738 | /* Old method - ELF header with PT_NOTE sections only works on BE */ |
739 | #ifdef __BIG_ENDIAN__ | |
9b6b563c PM |
740 | static struct fake_elf { |
741 | Elf32_Ehdr elfhdr; | |
742 | Elf32_Phdr phdr[2]; | |
743 | struct chrpnote { | |
744 | u32 namesz; | |
745 | u32 descsz; | |
746 | u32 type; | |
747 | char name[8]; /* "PowerPC" */ | |
748 | struct chrpdesc { | |
749 | u32 real_mode; | |
750 | u32 real_base; | |
751 | u32 real_size; | |
752 | u32 virt_base; | |
753 | u32 virt_size; | |
754 | u32 load_base; | |
755 | } chrpdesc; | |
756 | } chrpnote; | |
757 | struct rpanote { | |
758 | u32 namesz; | |
759 | u32 descsz; | |
760 | u32 type; | |
761 | char name[24]; /* "IBM,RPA-Client-Config" */ | |
762 | struct rpadesc { | |
763 | u32 lpar_affinity; | |
764 | u32 min_rmo_size; | |
765 | u32 min_rmo_percent; | |
766 | u32 max_pft_size; | |
767 | u32 splpar; | |
768 | u32 min_load; | |
769 | u32 new_mem_def; | |
770 | u32 ignore_me; | |
771 | } rpadesc; | |
772 | } rpanote; | |
5663a123 | 773 | } fake_elf = { |
9b6b563c PM |
774 | .elfhdr = { |
775 | .e_ident = { 0x7f, 'E', 'L', 'F', | |
776 | ELFCLASS32, ELFDATA2MSB, EV_CURRENT }, | |
777 | .e_type = ET_EXEC, /* yeah right */ | |
778 | .e_machine = EM_PPC, | |
779 | .e_version = EV_CURRENT, | |
780 | .e_phoff = offsetof(struct fake_elf, phdr), | |
781 | .e_phentsize = sizeof(Elf32_Phdr), | |
782 | .e_phnum = 2 | |
783 | }, | |
784 | .phdr = { | |
785 | [0] = { | |
786 | .p_type = PT_NOTE, | |
787 | .p_offset = offsetof(struct fake_elf, chrpnote), | |
788 | .p_filesz = sizeof(struct chrpnote) | |
789 | }, [1] = { | |
790 | .p_type = PT_NOTE, | |
791 | .p_offset = offsetof(struct fake_elf, rpanote), | |
792 | .p_filesz = sizeof(struct rpanote) | |
793 | } | |
794 | }, | |
795 | .chrpnote = { | |
796 | .namesz = sizeof("PowerPC"), | |
797 | .descsz = sizeof(struct chrpdesc), | |
798 | .type = 0x1275, | |
799 | .name = "PowerPC", | |
800 | .chrpdesc = { | |
801 | .real_mode = ~0U, /* ~0 means "don't care" */ | |
802 | .real_base = ~0U, | |
803 | .real_size = ~0U, | |
804 | .virt_base = ~0U, | |
805 | .virt_size = ~0U, | |
806 | .load_base = ~0U | |
807 | }, | |
808 | }, | |
809 | .rpanote = { | |
810 | .namesz = sizeof("IBM,RPA-Client-Config"), | |
811 | .descsz = sizeof(struct rpadesc), | |
812 | .type = 0x12759999, | |
813 | .name = "IBM,RPA-Client-Config", | |
814 | .rpadesc = { | |
5663a123 PM |
815 | .lpar_affinity = 0, |
816 | .min_rmo_size = 64, /* in megabytes */ | |
9b6b563c | 817 | .min_rmo_percent = 0, |
5663a123 | 818 | .max_pft_size = 48, /* 2^48 bytes max PFT size */ |
9b6b563c PM |
819 | .splpar = 1, |
820 | .min_load = ~0U, | |
5663a123 | 821 | .new_mem_def = 0 |
9b6b563c PM |
822 | } |
823 | } | |
824 | }; | |
493adffc | 825 | #endif /* __BIG_ENDIAN__ */ |
9b6b563c | 826 | |
efec959f BH |
827 | static int __init prom_count_smt_threads(void) |
828 | { | |
829 | phandle node; | |
830 | char type[64]; | |
831 | unsigned int plen; | |
832 | ||
833 | /* Pick up th first CPU node we can find */ | |
834 | for (node = 0; prom_next_node(&node); ) { | |
835 | type[0] = 0; | |
836 | prom_getprop(node, "device_type", type, sizeof(type)); | |
837 | ||
5827d416 | 838 | if (strcmp(type, "cpu")) |
efec959f BH |
839 | continue; |
840 | /* | |
841 | * There is an entry for each smt thread, each entry being | |
842 | * 4 bytes long. All cpus should have the same number of | |
843 | * smt threads, so return after finding the first. | |
844 | */ | |
845 | plen = prom_getproplen(node, "ibm,ppc-interrupt-server#s"); | |
846 | if (plen == PROM_ERROR) | |
847 | break; | |
848 | plen >>= 2; | |
2c48a7d6 | 849 | prom_debug("Found %lu smt threads per core\n", (unsigned long)plen); |
efec959f BH |
850 | |
851 | /* Sanity check */ | |
852 | if (plen < 1 || plen > 64) { | |
2c48a7d6 | 853 | prom_printf("Threads per core %lu out of bounds, assuming 1\n", |
efec959f BH |
854 | (unsigned long)plen); |
855 | return 1; | |
856 | } | |
857 | return plen; | |
858 | } | |
859 | prom_debug("No threads found, assuming 1 per core\n"); | |
860 | ||
861 | return 1; | |
862 | ||
863 | } | |
864 | ||
865 | ||
9b6b563c PM |
866 | static void __init prom_send_capabilities(void) |
867 | { | |
493adffc | 868 | ihandle root; |
f709bfac | 869 | prom_arg_t ret; |
dbd0c5d5 LD |
870 | u32 cores; |
871 | unsigned char *ptcores; | |
f709bfac PM |
872 | |
873 | root = call_prom("open", 1, 1, ADDR("/")); | |
874 | if (root != 0) { | |
efec959f BH |
875 | /* We need to tell the FW about the number of cores we support. |
876 | * | |
877 | * To do that, we count the number of threads on the first core | |
878 | * (we assume this is the same for all cores) and use it to | |
879 | * divide NR_CPUS. | |
880 | */ | |
dbd0c5d5 LD |
881 | |
882 | /* The core value may start at an odd address. If such a word | |
883 | * access is made at a cache line boundary, this leads to an | |
884 | * exception which may not be handled at this time. | |
885 | * Forcing a per byte access to avoid exception. | |
886 | */ | |
887 | ptcores = &ibm_architecture_vec[IBM_ARCH_VEC_NRCORES_OFFSET]; | |
888 | cores = 0; | |
889 | cores |= ptcores[0] << 24; | |
890 | cores |= ptcores[1] << 16; | |
891 | cores |= ptcores[2] << 8; | |
892 | cores |= ptcores[3]; | |
893 | if (cores != NR_CPUS) { | |
efec959f | 894 | prom_printf("WARNING ! " |
2c48a7d6 | 895 | "ibm_architecture_vec structure inconsistent: %lu!\n", |
dbd0c5d5 | 896 | cores); |
efec959f | 897 | } else { |
dbd0c5d5 | 898 | cores = DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads()); |
2c48a7d6 | 899 | prom_printf("Max number of cores passed to firmware: %lu (NR_CPUS = %lu)\n", |
dbd0c5d5 LD |
900 | cores, NR_CPUS); |
901 | ptcores[0] = (cores >> 24) & 0xff; | |
902 | ptcores[1] = (cores >> 16) & 0xff; | |
903 | ptcores[2] = (cores >> 8) & 0xff; | |
904 | ptcores[3] = cores & 0xff; | |
efec959f BH |
905 | } |
906 | ||
f709bfac | 907 | /* try calling the ibm,client-architecture-support method */ |
049d0497 | 908 | prom_printf("Calling ibm,client-architecture-support..."); |
f709bfac PM |
909 | if (call_prom_ret("call-method", 3, 2, &ret, |
910 | ADDR("ibm,client-architecture-support"), | |
33b74977 | 911 | root, |
f709bfac PM |
912 | ADDR(ibm_architecture_vec)) == 0) { |
913 | /* the call exists... */ | |
914 | if (ret) | |
4da727ae | 915 | prom_printf("\nWARNING: ibm,client-architecture" |
f709bfac PM |
916 | "-support call FAILED!\n"); |
917 | call_prom("close", 1, 0, root); | |
4da727ae | 918 | prom_printf(" done\n"); |
f709bfac PM |
919 | return; |
920 | } | |
921 | call_prom("close", 1, 0, root); | |
049d0497 | 922 | prom_printf(" not implemented\n"); |
f709bfac | 923 | } |
9b6b563c | 924 | |
493adffc BH |
925 | #ifdef __BIG_ENDIAN__ |
926 | { | |
927 | ihandle elfloader; | |
928 | ||
929 | /* no ibm,client-architecture-support call, try the old way */ | |
930 | elfloader = call_prom("open", 1, 1, | |
931 | ADDR("/packages/elf-loader")); | |
932 | if (elfloader == 0) { | |
933 | prom_printf("couldn't open /packages/elf-loader\n"); | |
934 | return; | |
935 | } | |
936 | call_prom("call-method", 3, 1, ADDR("process-elf-header"), | |
937 | elfloader, ADDR(&fake_elf)); | |
938 | call_prom("close", 1, 0, elfloader); | |
9b6b563c | 939 | } |
493adffc | 940 | #endif /* __BIG_ENDIAN__ */ |
9b6b563c | 941 | } |
493adffc | 942 | #endif /* #if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) */ |
9b6b563c PM |
943 | |
944 | /* | |
945 | * Memory allocation strategy... our layout is normally: | |
946 | * | |
947 | * at 14Mb or more we have vmlinux, then a gap and initrd. In some | |
948 | * rare cases, initrd might end up being before the kernel though. | |
949 | * We assume this won't override the final kernel at 0, we have no | |
950 | * provision to handle that in this version, but it should hopefully | |
951 | * never happen. | |
952 | * | |
953 | * alloc_top is set to the top of RMO, eventually shrink down if the | |
954 | * TCEs overlap | |
955 | * | |
956 | * alloc_bottom is set to the top of kernel/initrd | |
957 | * | |
958 | * from there, allocations are done this way : rtas is allocated | |
959 | * topmost, and the device-tree is allocated from the bottom. We try | |
960 | * to grow the device-tree allocation as we progress. If we can't, | |
961 | * then we fail, we don't currently have a facility to restart | |
962 | * elsewhere, but that shouldn't be necessary. | |
963 | * | |
964 | * Note that calls to reserve_mem have to be done explicitly, memory | |
965 | * allocated with either alloc_up or alloc_down isn't automatically | |
966 | * reserved. | |
967 | */ | |
968 | ||
969 | ||
970 | /* | |
971 | * Allocates memory in the RMO upward from the kernel/initrd | |
972 | * | |
973 | * When align is 0, this is a special case, it means to allocate in place | |
974 | * at the current location of alloc_bottom or fail (that is basically | |
975 | * extending the previous allocation). Used for the device-tree flattening | |
976 | */ | |
977 | static unsigned long __init alloc_up(unsigned long size, unsigned long align) | |
978 | { | |
5827d416 | 979 | unsigned long base = alloc_bottom; |
9b6b563c PM |
980 | unsigned long addr = 0; |
981 | ||
c4988820 PM |
982 | if (align) |
983 | base = _ALIGN_UP(base, align); | |
9b6b563c | 984 | prom_debug("alloc_up(%x, %x)\n", size, align); |
5827d416 | 985 | if (ram_top == 0) |
9b6b563c PM |
986 | prom_panic("alloc_up() called with mem not initialized\n"); |
987 | ||
988 | if (align) | |
5827d416 | 989 | base = _ALIGN_UP(alloc_bottom, align); |
9b6b563c | 990 | else |
5827d416 | 991 | base = alloc_bottom; |
9b6b563c | 992 | |
5827d416 | 993 | for(; (base + size) <= alloc_top; |
9b6b563c PM |
994 | base = _ALIGN_UP(base + 0x100000, align)) { |
995 | prom_debug(" trying: 0x%x\n\r", base); | |
996 | addr = (unsigned long)prom_claim(base, size, 0); | |
c4988820 | 997 | if (addr != PROM_ERROR && addr != 0) |
9b6b563c PM |
998 | break; |
999 | addr = 0; | |
1000 | if (align == 0) | |
1001 | break; | |
1002 | } | |
1003 | if (addr == 0) | |
1004 | return 0; | |
5827d416 | 1005 | alloc_bottom = addr + size; |
9b6b563c PM |
1006 | |
1007 | prom_debug(" -> %x\n", addr); | |
5827d416 AB |
1008 | prom_debug(" alloc_bottom : %x\n", alloc_bottom); |
1009 | prom_debug(" alloc_top : %x\n", alloc_top); | |
1010 | prom_debug(" alloc_top_hi : %x\n", alloc_top_high); | |
1011 | prom_debug(" rmo_top : %x\n", rmo_top); | |
1012 | prom_debug(" ram_top : %x\n", ram_top); | |
9b6b563c PM |
1013 | |
1014 | return addr; | |
1015 | } | |
1016 | ||
1017 | /* | |
1018 | * Allocates memory downward, either from top of RMO, or if highmem | |
1019 | * is set, from the top of RAM. Note that this one doesn't handle | |
1020 | * failures. It does claim memory if highmem is not set. | |
1021 | */ | |
1022 | static unsigned long __init alloc_down(unsigned long size, unsigned long align, | |
1023 | int highmem) | |
1024 | { | |
1025 | unsigned long base, addr = 0; | |
1026 | ||
1027 | prom_debug("alloc_down(%x, %x, %s)\n", size, align, | |
5827d416 AB |
1028 | highmem ? "(high)" : "(low)"); |
1029 | if (ram_top == 0) | |
9b6b563c PM |
1030 | prom_panic("alloc_down() called with mem not initialized\n"); |
1031 | ||
1032 | if (highmem) { | |
1033 | /* Carve out storage for the TCE table. */ | |
5827d416 AB |
1034 | addr = _ALIGN_DOWN(alloc_top_high - size, align); |
1035 | if (addr <= alloc_bottom) | |
9b6b563c PM |
1036 | return 0; |
1037 | /* Will we bump into the RMO ? If yes, check out that we | |
1038 | * didn't overlap existing allocations there, if we did, | |
1039 | * we are dead, we must be the first in town ! | |
1040 | */ | |
5827d416 | 1041 | if (addr < rmo_top) { |
9b6b563c | 1042 | /* Good, we are first */ |
5827d416 AB |
1043 | if (alloc_top == rmo_top) |
1044 | alloc_top = rmo_top = addr; | |
9b6b563c PM |
1045 | else |
1046 | return 0; | |
1047 | } | |
5827d416 | 1048 | alloc_top_high = addr; |
9b6b563c PM |
1049 | goto bail; |
1050 | } | |
1051 | ||
5827d416 AB |
1052 | base = _ALIGN_DOWN(alloc_top - size, align); |
1053 | for (; base > alloc_bottom; | |
9b6b563c PM |
1054 | base = _ALIGN_DOWN(base - 0x100000, align)) { |
1055 | prom_debug(" trying: 0x%x\n\r", base); | |
1056 | addr = (unsigned long)prom_claim(base, size, 0); | |
c4988820 | 1057 | if (addr != PROM_ERROR && addr != 0) |
9b6b563c PM |
1058 | break; |
1059 | addr = 0; | |
1060 | } | |
1061 | if (addr == 0) | |
1062 | return 0; | |
5827d416 | 1063 | alloc_top = addr; |
9b6b563c PM |
1064 | |
1065 | bail: | |
1066 | prom_debug(" -> %x\n", addr); | |
5827d416 AB |
1067 | prom_debug(" alloc_bottom : %x\n", alloc_bottom); |
1068 | prom_debug(" alloc_top : %x\n", alloc_top); | |
1069 | prom_debug(" alloc_top_hi : %x\n", alloc_top_high); | |
1070 | prom_debug(" rmo_top : %x\n", rmo_top); | |
1071 | prom_debug(" ram_top : %x\n", ram_top); | |
9b6b563c PM |
1072 | |
1073 | return addr; | |
1074 | } | |
1075 | ||
1076 | /* | |
1077 | * Parse a "reg" cell | |
1078 | */ | |
1079 | static unsigned long __init prom_next_cell(int s, cell_t **cellp) | |
1080 | { | |
1081 | cell_t *p = *cellp; | |
1082 | unsigned long r = 0; | |
1083 | ||
1084 | /* Ignore more than 2 cells */ | |
1085 | while (s > sizeof(unsigned long) / 4) { | |
1086 | p++; | |
1087 | s--; | |
1088 | } | |
493adffc | 1089 | r = be32_to_cpu(*p++); |
9b6b563c | 1090 | #ifdef CONFIG_PPC64 |
35499c01 | 1091 | if (s > 1) { |
9b6b563c | 1092 | r <<= 32; |
493adffc | 1093 | r |= be32_to_cpu(*(p++)); |
9b6b563c PM |
1094 | } |
1095 | #endif | |
1096 | *cellp = p; | |
1097 | return r; | |
1098 | } | |
1099 | ||
1100 | /* | |
1101 | * Very dumb function for adding to the memory reserve list, but | |
1102 | * we don't need anything smarter at this point | |
1103 | * | |
1104 | * XXX Eventually check for collisions. They should NEVER happen. | |
1105 | * If problems seem to show up, it would be a good start to track | |
1106 | * them down. | |
1107 | */ | |
0108d3fe | 1108 | static void __init reserve_mem(u64 base, u64 size) |
9b6b563c | 1109 | { |
cbbcf340 | 1110 | u64 top = base + size; |
5827d416 | 1111 | unsigned long cnt = mem_reserve_cnt; |
9b6b563c PM |
1112 | |
1113 | if (size == 0) | |
1114 | return; | |
1115 | ||
1116 | /* We need to always keep one empty entry so that we | |
1117 | * have our terminator with "size" set to 0 since we are | |
1118 | * dumb and just copy this entire array to the boot params | |
1119 | */ | |
1120 | base = _ALIGN_DOWN(base, PAGE_SIZE); | |
1121 | top = _ALIGN_UP(top, PAGE_SIZE); | |
1122 | size = top - base; | |
1123 | ||
1124 | if (cnt >= (MEM_RESERVE_MAP_SIZE - 1)) | |
1125 | prom_panic("Memory reserve map exhausted !\n"); | |
493adffc BH |
1126 | mem_reserve_map[cnt].base = cpu_to_be64(base); |
1127 | mem_reserve_map[cnt].size = cpu_to_be64(size); | |
5827d416 | 1128 | mem_reserve_cnt = cnt + 1; |
9b6b563c PM |
1129 | } |
1130 | ||
1131 | /* | |
b3c2ffd5 | 1132 | * Initialize memory allocation mechanism, parse "memory" nodes and |
9b6b563c PM |
1133 | * obtain that way the top of memory and RMO to setup out local allocator |
1134 | */ | |
1135 | static void __init prom_init_mem(void) | |
1136 | { | |
1137 | phandle node; | |
1138 | char *path, type[64]; | |
1139 | unsigned int plen; | |
1140 | cell_t *p, *endp; | |
493adffc | 1141 | __be32 val; |
9b6b563c PM |
1142 | u32 rac, rsc; |
1143 | ||
1144 | /* | |
1145 | * We iterate the memory nodes to find | |
1146 | * 1) top of RMO (first node) | |
1147 | * 2) top of memory | |
1148 | */ | |
493adffc BH |
1149 | val = cpu_to_be32(2); |
1150 | prom_getprop(prom.root, "#address-cells", &val, sizeof(val)); | |
1151 | rac = be32_to_cpu(val); | |
1152 | val = cpu_to_be32(1); | |
1153 | prom_getprop(prom.root, "#size-cells", &val, sizeof(rsc)); | |
1154 | rsc = be32_to_cpu(val); | |
1155 | prom_debug("root_addr_cells: %x\n", rac); | |
1156 | prom_debug("root_size_cells: %x\n", rsc); | |
9b6b563c PM |
1157 | |
1158 | prom_debug("scanning memory:\n"); | |
5827d416 | 1159 | path = prom_scratch; |
9b6b563c PM |
1160 | |
1161 | for (node = 0; prom_next_node(&node); ) { | |
1162 | type[0] = 0; | |
1163 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1164 | ||
c4988820 PM |
1165 | if (type[0] == 0) { |
1166 | /* | |
1167 | * CHRP Longtrail machines have no device_type | |
1168 | * on the memory node, so check the name instead... | |
1169 | */ | |
1170 | prom_getprop(node, "name", type, sizeof(type)); | |
1171 | } | |
5827d416 | 1172 | if (strcmp(type, "memory")) |
9b6b563c | 1173 | continue; |
c4988820 | 1174 | |
5827d416 | 1175 | plen = prom_getprop(node, "reg", regbuf, sizeof(regbuf)); |
9b6b563c PM |
1176 | if (plen > sizeof(regbuf)) { |
1177 | prom_printf("memory node too large for buffer !\n"); | |
1178 | plen = sizeof(regbuf); | |
1179 | } | |
5827d416 | 1180 | p = regbuf; |
9b6b563c PM |
1181 | endp = p + (plen / sizeof(cell_t)); |
1182 | ||
1183 | #ifdef DEBUG_PROM | |
1184 | memset(path, 0, PROM_SCRATCH_SIZE); | |
1185 | call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); | |
1186 | prom_debug(" node %s :\n", path); | |
1187 | #endif /* DEBUG_PROM */ | |
1188 | ||
1189 | while ((endp - p) >= (rac + rsc)) { | |
1190 | unsigned long base, size; | |
1191 | ||
1192 | base = prom_next_cell(rac, &p); | |
1193 | size = prom_next_cell(rsc, &p); | |
1194 | ||
1195 | if (size == 0) | |
1196 | continue; | |
1197 | prom_debug(" %x %x\n", base, size); | |
5827d416 AB |
1198 | if (base == 0 && (of_platform & PLATFORM_LPAR)) |
1199 | rmo_top = size; | |
1200 | if ((base + size) > ram_top) | |
1201 | ram_top = base + size; | |
9b6b563c PM |
1202 | } |
1203 | } | |
1204 | ||
5827d416 | 1205 | alloc_bottom = PAGE_ALIGN((unsigned long)&_end + 0x4000); |
9b6b563c | 1206 | |
cf68787b BK |
1207 | /* |
1208 | * If prom_memory_limit is set we reduce the upper limits *except* for | |
1209 | * alloc_top_high. This must be the real top of RAM so we can put | |
1210 | * TCE's up there. | |
1211 | */ | |
1212 | ||
5827d416 | 1213 | alloc_top_high = ram_top; |
cf68787b | 1214 | |
5827d416 AB |
1215 | if (prom_memory_limit) { |
1216 | if (prom_memory_limit <= alloc_bottom) { | |
cf68787b | 1217 | prom_printf("Ignoring mem=%x <= alloc_bottom.\n", |
5827d416 AB |
1218 | prom_memory_limit); |
1219 | prom_memory_limit = 0; | |
1220 | } else if (prom_memory_limit >= ram_top) { | |
cf68787b | 1221 | prom_printf("Ignoring mem=%x >= ram_top.\n", |
5827d416 AB |
1222 | prom_memory_limit); |
1223 | prom_memory_limit = 0; | |
cf68787b | 1224 | } else { |
5827d416 AB |
1225 | ram_top = prom_memory_limit; |
1226 | rmo_top = min(rmo_top, prom_memory_limit); | |
cf68787b BK |
1227 | } |
1228 | } | |
1229 | ||
9b6b563c PM |
1230 | /* |
1231 | * Setup our top alloc point, that is top of RMO or top of | |
1232 | * segment 0 when running non-LPAR. | |
1233 | * Some RS64 machines have buggy firmware where claims up at | |
1234 | * 1GB fail. Cap at 768MB as a workaround. | |
1235 | * Since 768MB is plenty of room, and we need to cap to something | |
1236 | * reasonable on 32-bit, cap at 768MB on all machines. | |
1237 | */ | |
5827d416 AB |
1238 | if (!rmo_top) |
1239 | rmo_top = ram_top; | |
1240 | rmo_top = min(0x30000000ul, rmo_top); | |
1241 | alloc_top = rmo_top; | |
1242 | alloc_top_high = ram_top; | |
9b6b563c | 1243 | |
64968f60 PM |
1244 | /* |
1245 | * Check if we have an initrd after the kernel but still inside | |
1246 | * the RMO. If we do move our bottom point to after it. | |
1247 | */ | |
5827d416 AB |
1248 | if (prom_initrd_start && |
1249 | prom_initrd_start < rmo_top && | |
1250 | prom_initrd_end > alloc_bottom) | |
1251 | alloc_bottom = PAGE_ALIGN(prom_initrd_end); | |
64968f60 | 1252 | |
9b6b563c | 1253 | prom_printf("memory layout at init:\n"); |
5827d416 AB |
1254 | prom_printf(" memory_limit : %x (16 MB aligned)\n", prom_memory_limit); |
1255 | prom_printf(" alloc_bottom : %x\n", alloc_bottom); | |
1256 | prom_printf(" alloc_top : %x\n", alloc_top); | |
1257 | prom_printf(" alloc_top_hi : %x\n", alloc_top_high); | |
1258 | prom_printf(" rmo_top : %x\n", rmo_top); | |
1259 | prom_printf(" ram_top : %x\n", ram_top); | |
9b6b563c PM |
1260 | } |
1261 | ||
27f44888 BH |
1262 | static void __init prom_close_stdin(void) |
1263 | { | |
493adffc BH |
1264 | __be32 val; |
1265 | ihandle stdin; | |
27f44888 | 1266 | |
493adffc BH |
1267 | if (prom_getprop(prom.chosen, "stdin", &val, sizeof(val)) > 0) { |
1268 | stdin = be32_to_cpu(val); | |
1269 | call_prom("close", 1, 0, stdin); | |
1270 | } | |
27f44888 BH |
1271 | } |
1272 | ||
1273 | #ifdef CONFIG_PPC_POWERNV | |
1274 | ||
6e35d5da BH |
1275 | #ifdef CONFIG_PPC_EARLY_DEBUG_OPAL |
1276 | static u64 __initdata prom_opal_base; | |
1277 | static u64 __initdata prom_opal_entry; | |
1278 | #endif | |
1279 | ||
6e35d5da BH |
1280 | /* |
1281 | * Allocate room for and instantiate OPAL | |
1282 | */ | |
1283 | static void __init prom_instantiate_opal(void) | |
1284 | { | |
1285 | phandle opal_node; | |
1286 | ihandle opal_inst; | |
1287 | u64 base, entry; | |
1288 | u64 size = 0, align = 0x10000; | |
493adffc | 1289 | __be64 val64; |
6e35d5da BH |
1290 | u32 rets[2]; |
1291 | ||
1292 | prom_debug("prom_instantiate_opal: start...\n"); | |
1293 | ||
1294 | opal_node = call_prom("finddevice", 1, 1, ADDR("/ibm,opal")); | |
1295 | prom_debug("opal_node: %x\n", opal_node); | |
1296 | if (!PHANDLE_VALID(opal_node)) | |
1297 | return; | |
1298 | ||
493adffc BH |
1299 | val64 = 0; |
1300 | prom_getprop(opal_node, "opal-runtime-size", &val64, sizeof(val64)); | |
1301 | size = be64_to_cpu(val64); | |
6e35d5da BH |
1302 | if (size == 0) |
1303 | return; | |
493adffc BH |
1304 | val64 = 0; |
1305 | prom_getprop(opal_node, "opal-runtime-alignment", &val64,sizeof(val64)); | |
1306 | align = be64_to_cpu(val64); | |
6e35d5da BH |
1307 | |
1308 | base = alloc_down(size, align, 0); | |
1309 | if (base == 0) { | |
1310 | prom_printf("OPAL allocation failed !\n"); | |
1311 | return; | |
1312 | } | |
1313 | ||
1314 | opal_inst = call_prom("open", 1, 1, ADDR("/ibm,opal")); | |
1315 | if (!IHANDLE_VALID(opal_inst)) { | |
1316 | prom_printf("opening opal package failed (%x)\n", opal_inst); | |
1317 | return; | |
1318 | } | |
1319 | ||
1320 | prom_printf("instantiating opal at 0x%x...", base); | |
1321 | ||
1322 | if (call_prom_ret("call-method", 4, 3, rets, | |
1323 | ADDR("load-opal-runtime"), | |
1324 | opal_inst, | |
1325 | base >> 32, base & 0xffffffff) != 0 | |
1326 | || (rets[0] == 0 && rets[1] == 0)) { | |
1327 | prom_printf(" failed\n"); | |
1328 | return; | |
1329 | } | |
1330 | entry = (((u64)rets[0]) << 32) | rets[1]; | |
1331 | ||
1332 | prom_printf(" done\n"); | |
1333 | ||
1334 | reserve_mem(base, size); | |
1335 | ||
1336 | prom_debug("opal base = 0x%x\n", base); | |
1337 | prom_debug("opal align = 0x%x\n", align); | |
1338 | prom_debug("opal entry = 0x%x\n", entry); | |
1339 | prom_debug("opal size = 0x%x\n", (long)size); | |
1340 | ||
1341 | prom_setprop(opal_node, "/ibm,opal", "opal-base-address", | |
1342 | &base, sizeof(base)); | |
1343 | prom_setprop(opal_node, "/ibm,opal", "opal-entry-address", | |
1344 | &entry, sizeof(entry)); | |
1345 | ||
1346 | #ifdef CONFIG_PPC_EARLY_DEBUG_OPAL | |
5827d416 AB |
1347 | prom_opal_base = base; |
1348 | prom_opal_entry = entry; | |
6e35d5da BH |
1349 | #endif |
1350 | prom_debug("prom_instantiate_opal: end...\n"); | |
1351 | } | |
1352 | ||
27f44888 | 1353 | #endif /* CONFIG_PPC_POWERNV */ |
9b6b563c PM |
1354 | |
1355 | /* | |
1356 | * Allocate room for and instantiate RTAS | |
1357 | */ | |
1358 | static void __init prom_instantiate_rtas(void) | |
1359 | { | |
1360 | phandle rtas_node; | |
1361 | ihandle rtas_inst; | |
1362 | u32 base, entry = 0; | |
493adffc | 1363 | __be32 val; |
9b6b563c PM |
1364 | u32 size = 0; |
1365 | ||
1366 | prom_debug("prom_instantiate_rtas: start...\n"); | |
1367 | ||
1368 | rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas")); | |
1369 | prom_debug("rtas_node: %x\n", rtas_node); | |
1370 | if (!PHANDLE_VALID(rtas_node)) | |
1371 | return; | |
1372 | ||
493adffc BH |
1373 | val = 0; |
1374 | prom_getprop(rtas_node, "rtas-size", &val, sizeof(size)); | |
1375 | size = be32_to_cpu(val); | |
9b6b563c PM |
1376 | if (size == 0) |
1377 | return; | |
1378 | ||
1379 | base = alloc_down(size, PAGE_SIZE, 0); | |
6d1e2c6c AB |
1380 | if (base == 0) |
1381 | prom_panic("Could not allocate memory for RTAS\n"); | |
9b6b563c PM |
1382 | |
1383 | rtas_inst = call_prom("open", 1, 1, ADDR("/rtas")); | |
1384 | if (!IHANDLE_VALID(rtas_inst)) { | |
a23414be | 1385 | prom_printf("opening rtas package failed (%x)\n", rtas_inst); |
9b6b563c PM |
1386 | return; |
1387 | } | |
1388 | ||
1f8737aa | 1389 | prom_printf("instantiating rtas at 0x%x...", base); |
9b6b563c PM |
1390 | |
1391 | if (call_prom_ret("call-method", 3, 2, &entry, | |
1392 | ADDR("instantiate-rtas"), | |
a23414be | 1393 | rtas_inst, base) != 0 |
9b6b563c PM |
1394 | || entry == 0) { |
1395 | prom_printf(" failed\n"); | |
1396 | return; | |
1397 | } | |
1398 | prom_printf(" done\n"); | |
1399 | ||
1400 | reserve_mem(base, size); | |
1401 | ||
493adffc | 1402 | val = cpu_to_be32(base); |
a23414be | 1403 | prom_setprop(rtas_node, "/rtas", "linux,rtas-base", |
493adffc BH |
1404 | &val, sizeof(val)); |
1405 | val = cpu_to_be32(entry); | |
a23414be | 1406 | prom_setprop(rtas_node, "/rtas", "linux,rtas-entry", |
493adffc | 1407 | &val, sizeof(val)); |
9b6b563c | 1408 | |
dbe78b40 BH |
1409 | /* Check if it supports "query-cpu-stopped-state" */ |
1410 | if (prom_getprop(rtas_node, "query-cpu-stopped-state", | |
1411 | &val, sizeof(val)) != PROM_ERROR) | |
1412 | rtas_has_query_cpu_stopped = true; | |
1413 | ||
9b6b563c PM |
1414 | prom_debug("rtas base = 0x%x\n", base); |
1415 | prom_debug("rtas entry = 0x%x\n", entry); | |
1416 | prom_debug("rtas size = 0x%x\n", (long)size); | |
1417 | ||
1418 | prom_debug("prom_instantiate_rtas: end...\n"); | |
1419 | } | |
1420 | ||
1421 | #ifdef CONFIG_PPC64 | |
4a727429 AL |
1422 | /* |
1423 | * Allocate room for and instantiate Stored Measurement Log (SML) | |
1424 | */ | |
1425 | static void __init prom_instantiate_sml(void) | |
1426 | { | |
1427 | phandle ibmvtpm_node; | |
1428 | ihandle ibmvtpm_inst; | |
b4ed0469 | 1429 | u32 entry = 0, size = 0, succ = 0; |
4a727429 | 1430 | u64 base; |
b4ed0469 | 1431 | __be32 val; |
4a727429 AL |
1432 | |
1433 | prom_debug("prom_instantiate_sml: start...\n"); | |
1434 | ||
2f82e982 | 1435 | ibmvtpm_node = call_prom("finddevice", 1, 1, ADDR("/vdevice/vtpm")); |
4a727429 AL |
1436 | prom_debug("ibmvtpm_node: %x\n", ibmvtpm_node); |
1437 | if (!PHANDLE_VALID(ibmvtpm_node)) | |
1438 | return; | |
1439 | ||
2f82e982 | 1440 | ibmvtpm_inst = call_prom("open", 1, 1, ADDR("/vdevice/vtpm")); |
4a727429 AL |
1441 | if (!IHANDLE_VALID(ibmvtpm_inst)) { |
1442 | prom_printf("opening vtpm package failed (%x)\n", ibmvtpm_inst); | |
1443 | return; | |
1444 | } | |
1445 | ||
b4ed0469 HCVL |
1446 | if (prom_getprop(ibmvtpm_node, "ibm,sml-efi-reformat-supported", |
1447 | &val, sizeof(val)) != PROM_ERROR) { | |
1448 | if (call_prom_ret("call-method", 2, 2, &succ, | |
1449 | ADDR("reformat-sml-to-efi-alignment"), | |
1450 | ibmvtpm_inst) != 0 || succ == 0) { | |
1451 | prom_printf("Reformat SML to EFI alignment failed\n"); | |
1452 | return; | |
1453 | } | |
b4ed0469 | 1454 | |
9e5d4af4 HCVL |
1455 | if (call_prom_ret("call-method", 2, 2, &size, |
1456 | ADDR("sml-get-allocated-size"), | |
1457 | ibmvtpm_inst) != 0 || size == 0) { | |
1458 | prom_printf("SML get allocated size failed\n"); | |
1459 | return; | |
1460 | } | |
1461 | } else { | |
1462 | if (call_prom_ret("call-method", 2, 2, &size, | |
1463 | ADDR("sml-get-handover-size"), | |
1464 | ibmvtpm_inst) != 0 || size == 0) { | |
1465 | prom_printf("SML get handover size failed\n"); | |
1466 | return; | |
1467 | } | |
4a727429 AL |
1468 | } |
1469 | ||
1470 | base = alloc_down(size, PAGE_SIZE, 0); | |
1471 | if (base == 0) | |
1472 | prom_panic("Could not allocate memory for sml\n"); | |
1473 | ||
1474 | prom_printf("instantiating sml at 0x%x...", base); | |
1475 | ||
9e5d4af4 HCVL |
1476 | memset((void *)base, 0, size); |
1477 | ||
4a727429 AL |
1478 | if (call_prom_ret("call-method", 4, 2, &entry, |
1479 | ADDR("sml-handover"), | |
1480 | ibmvtpm_inst, size, base) != 0 || entry == 0) { | |
1481 | prom_printf("SML handover failed\n"); | |
1482 | return; | |
1483 | } | |
1484 | prom_printf(" done\n"); | |
1485 | ||
1486 | reserve_mem(base, size); | |
1487 | ||
2f82e982 | 1488 | prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-base", |
4a727429 | 1489 | &base, sizeof(base)); |
2f82e982 | 1490 | prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-size", |
4a727429 AL |
1491 | &size, sizeof(size)); |
1492 | ||
1493 | prom_debug("sml base = 0x%x\n", base); | |
1494 | prom_debug("sml size = 0x%x\n", (long)size); | |
1495 | ||
1496 | prom_debug("prom_instantiate_sml: end...\n"); | |
1497 | } | |
1498 | ||
9b6b563c PM |
1499 | /* |
1500 | * Allocate room for and initialize TCE tables | |
1501 | */ | |
493adffc | 1502 | #ifdef __BIG_ENDIAN__ |
9b6b563c PM |
1503 | static void __init prom_initialize_tce_table(void) |
1504 | { | |
1505 | phandle node; | |
1506 | ihandle phb_node; | |
1507 | char compatible[64], type[64], model[64]; | |
5827d416 | 1508 | char *path = prom_scratch; |
9b6b563c PM |
1509 | u64 base, align; |
1510 | u32 minalign, minsize; | |
1511 | u64 tce_entry, *tce_entryp; | |
1512 | u64 local_alloc_top, local_alloc_bottom; | |
1513 | u64 i; | |
1514 | ||
5827d416 | 1515 | if (prom_iommu_off) |
9b6b563c PM |
1516 | return; |
1517 | ||
1518 | prom_debug("starting prom_initialize_tce_table\n"); | |
1519 | ||
1520 | /* Cache current top of allocs so we reserve a single block */ | |
5827d416 | 1521 | local_alloc_top = alloc_top_high; |
9b6b563c PM |
1522 | local_alloc_bottom = local_alloc_top; |
1523 | ||
1524 | /* Search all nodes looking for PHBs. */ | |
1525 | for (node = 0; prom_next_node(&node); ) { | |
1526 | compatible[0] = 0; | |
1527 | type[0] = 0; | |
1528 | model[0] = 0; | |
1529 | prom_getprop(node, "compatible", | |
1530 | compatible, sizeof(compatible)); | |
1531 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1532 | prom_getprop(node, "model", model, sizeof(model)); | |
1533 | ||
5827d416 | 1534 | if ((type[0] == 0) || (strstr(type, "pci") == NULL)) |
9b6b563c PM |
1535 | continue; |
1536 | ||
e788ff13 | 1537 | /* Keep the old logic intact to avoid regression. */ |
9b6b563c | 1538 | if (compatible[0] != 0) { |
5827d416 AB |
1539 | if ((strstr(compatible, "python") == NULL) && |
1540 | (strstr(compatible, "Speedwagon") == NULL) && | |
1541 | (strstr(compatible, "Winnipeg") == NULL)) | |
9b6b563c PM |
1542 | continue; |
1543 | } else if (model[0] != 0) { | |
5827d416 AB |
1544 | if ((strstr(model, "ython") == NULL) && |
1545 | (strstr(model, "peedwagon") == NULL) && | |
1546 | (strstr(model, "innipeg") == NULL)) | |
9b6b563c PM |
1547 | continue; |
1548 | } | |
1549 | ||
1550 | if (prom_getprop(node, "tce-table-minalign", &minalign, | |
1551 | sizeof(minalign)) == PROM_ERROR) | |
1552 | minalign = 0; | |
1553 | if (prom_getprop(node, "tce-table-minsize", &minsize, | |
1554 | sizeof(minsize)) == PROM_ERROR) | |
1555 | minsize = 4UL << 20; | |
1556 | ||
1557 | /* | |
1558 | * Even though we read what OF wants, we just set the table | |
1559 | * size to 4 MB. This is enough to map 2GB of PCI DMA space. | |
1560 | * By doing this, we avoid the pitfalls of trying to DMA to | |
1561 | * MMIO space and the DMA alias hole. | |
1562 | * | |
1563 | * On POWER4, firmware sets the TCE region by assuming | |
1564 | * each TCE table is 8MB. Using this memory for anything | |
1565 | * else will impact performance, so we always allocate 8MB. | |
1566 | * Anton | |
1567 | */ | |
d3dbeef6 | 1568 | if (pvr_version_is(PVR_POWER4) || pvr_version_is(PVR_POWER4p)) |
9b6b563c PM |
1569 | minsize = 8UL << 20; |
1570 | else | |
1571 | minsize = 4UL << 20; | |
1572 | ||
1573 | /* Align to the greater of the align or size */ | |
1574 | align = max(minalign, minsize); | |
1575 | base = alloc_down(minsize, align, 1); | |
1576 | if (base == 0) | |
1577 | prom_panic("ERROR, cannot find space for TCE table.\n"); | |
1578 | if (base < local_alloc_bottom) | |
1579 | local_alloc_bottom = base; | |
1580 | ||
9b6b563c | 1581 | /* It seems OF doesn't null-terminate the path :-( */ |
aca71ef8 | 1582 | memset(path, 0, PROM_SCRATCH_SIZE); |
9b6b563c PM |
1583 | /* Call OF to setup the TCE hardware */ |
1584 | if (call_prom("package-to-path", 3, 1, node, | |
1585 | path, PROM_SCRATCH_SIZE-1) == PROM_ERROR) { | |
1586 | prom_printf("package-to-path failed\n"); | |
1587 | } | |
1588 | ||
a23414be PM |
1589 | /* Save away the TCE table attributes for later use. */ |
1590 | prom_setprop(node, path, "linux,tce-base", &base, sizeof(base)); | |
1591 | prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize)); | |
1592 | ||
9b6b563c PM |
1593 | prom_debug("TCE table: %s\n", path); |
1594 | prom_debug("\tnode = 0x%x\n", node); | |
1595 | prom_debug("\tbase = 0x%x\n", base); | |
1596 | prom_debug("\tsize = 0x%x\n", minsize); | |
1597 | ||
1598 | /* Initialize the table to have a one-to-one mapping | |
1599 | * over the allocated size. | |
1600 | */ | |
2b931fb6 | 1601 | tce_entryp = (u64 *)base; |
9b6b563c PM |
1602 | for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) { |
1603 | tce_entry = (i << PAGE_SHIFT); | |
1604 | tce_entry |= 0x3; | |
1605 | *tce_entryp = tce_entry; | |
1606 | } | |
1607 | ||
1608 | prom_printf("opening PHB %s", path); | |
1609 | phb_node = call_prom("open", 1, 1, path); | |
1610 | if (phb_node == 0) | |
1611 | prom_printf("... failed\n"); | |
1612 | else | |
1613 | prom_printf("... done\n"); | |
1614 | ||
1615 | call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"), | |
1616 | phb_node, -1, minsize, | |
1617 | (u32) base, (u32) (base >> 32)); | |
1618 | call_prom("close", 1, 0, phb_node); | |
1619 | } | |
1620 | ||
1621 | reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom); | |
1622 | ||
2babf5c2 ME |
1623 | /* These are only really needed if there is a memory limit in |
1624 | * effect, but we don't know so export them always. */ | |
5827d416 AB |
1625 | prom_tce_alloc_start = local_alloc_bottom; |
1626 | prom_tce_alloc_end = local_alloc_top; | |
9b6b563c PM |
1627 | |
1628 | /* Flag the first invalid entry */ | |
1629 | prom_debug("ending prom_initialize_tce_table\n"); | |
1630 | } | |
493adffc BH |
1631 | #endif /* __BIG_ENDIAN__ */ |
1632 | #endif /* CONFIG_PPC64 */ | |
9b6b563c PM |
1633 | |
1634 | /* | |
1635 | * With CHRP SMP we need to use the OF to start the other processors. | |
1636 | * We can't wait until smp_boot_cpus (the OF is trashed by then) | |
1637 | * so we have to put the processors into a holding pattern controlled | |
1638 | * by the kernel (not OF) before we destroy the OF. | |
1639 | * | |
1640 | * This uses a chunk of low memory, puts some holding pattern | |
1641 | * code there and sends the other processors off to there until | |
1642 | * smp_boot_cpus tells them to do something. The holding pattern | |
1643 | * checks that address until its cpu # is there, when it is that | |
1644 | * cpu jumps to __secondary_start(). smp_boot_cpus() takes care | |
1645 | * of setting those values. | |
1646 | * | |
1647 | * We also use physical address 0x4 here to tell when a cpu | |
1648 | * is in its holding pattern code. | |
1649 | * | |
1650 | * -- Cort | |
1651 | */ | |
bbd0abda PM |
1652 | /* |
1653 | * We want to reference the copy of __secondary_hold_* in the | |
1654 | * 0 - 0x100 address range | |
1655 | */ | |
1656 | #define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff) | |
1657 | ||
9b6b563c PM |
1658 | static void __init prom_hold_cpus(void) |
1659 | { | |
9b6b563c | 1660 | unsigned long i; |
9b6b563c PM |
1661 | phandle node; |
1662 | char type[64]; | |
9b6b563c | 1663 | unsigned long *spinloop |
bbd0abda | 1664 | = (void *) LOW_ADDR(__secondary_hold_spinloop); |
9b6b563c | 1665 | unsigned long *acknowledge |
bbd0abda | 1666 | = (void *) LOW_ADDR(__secondary_hold_acknowledge); |
bbd0abda | 1667 | unsigned long secondary_hold = LOW_ADDR(__secondary_hold); |
9b6b563c | 1668 | |
dbe78b40 BH |
1669 | /* |
1670 | * On pseries, if RTAS supports "query-cpu-stopped-state", | |
1671 | * we skip this stage, the CPUs will be started by the | |
1672 | * kernel using RTAS. | |
1673 | */ | |
1674 | if ((of_platform == PLATFORM_PSERIES || | |
1675 | of_platform == PLATFORM_PSERIES_LPAR) && | |
1676 | rtas_has_query_cpu_stopped) { | |
1677 | prom_printf("prom_hold_cpus: skipped\n"); | |
1678 | return; | |
1679 | } | |
1680 | ||
9b6b563c PM |
1681 | prom_debug("prom_hold_cpus: start...\n"); |
1682 | prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop); | |
1683 | prom_debug(" 1) *spinloop = 0x%x\n", *spinloop); | |
1684 | prom_debug(" 1) acknowledge = 0x%x\n", | |
1685 | (unsigned long)acknowledge); | |
1686 | prom_debug(" 1) *acknowledge = 0x%x\n", *acknowledge); | |
1687 | prom_debug(" 1) secondary_hold = 0x%x\n", secondary_hold); | |
1688 | ||
1689 | /* Set the common spinloop variable, so all of the secondary cpus | |
1690 | * will block when they are awakened from their OF spinloop. | |
1691 | * This must occur for both SMP and non SMP kernels, since OF will | |
1692 | * be trashed when we move the kernel. | |
1693 | */ | |
1694 | *spinloop = 0; | |
1695 | ||
9b6b563c PM |
1696 | /* look for cpus */ |
1697 | for (node = 0; prom_next_node(&node); ) { | |
493adffc BH |
1698 | unsigned int cpu_no; |
1699 | __be32 reg; | |
1700 | ||
9b6b563c PM |
1701 | type[0] = 0; |
1702 | prom_getprop(node, "device_type", type, sizeof(type)); | |
5827d416 | 1703 | if (strcmp(type, "cpu") != 0) |
9b6b563c PM |
1704 | continue; |
1705 | ||
1706 | /* Skip non-configured cpus. */ | |
1707 | if (prom_getprop(node, "status", type, sizeof(type)) > 0) | |
5827d416 | 1708 | if (strcmp(type, "okay") != 0) |
9b6b563c PM |
1709 | continue; |
1710 | ||
493adffc | 1711 | reg = cpu_to_be32(-1); /* make sparse happy */ |
9b6b563c | 1712 | prom_getprop(node, "reg", ®, sizeof(reg)); |
493adffc | 1713 | cpu_no = be32_to_cpu(reg); |
9b6b563c | 1714 | |
493adffc | 1715 | prom_debug("cpu hw idx = %lu\n", cpu_no); |
9b6b563c PM |
1716 | |
1717 | /* Init the acknowledge var which will be reset by | |
1718 | * the secondary cpu when it awakens from its OF | |
1719 | * spinloop. | |
1720 | */ | |
1721 | *acknowledge = (unsigned long)-1; | |
1722 | ||
493adffc | 1723 | if (cpu_no != prom.cpu) { |
27f44888 | 1724 | /* Primary Thread of non-boot cpu or any thread */ |
493adffc | 1725 | prom_printf("starting cpu hw idx %lu... ", cpu_no); |
9b6b563c | 1726 | call_prom("start-cpu", 3, 0, node, |
493adffc | 1727 | secondary_hold, cpu_no); |
9b6b563c | 1728 | |
bbd0abda PM |
1729 | for (i = 0; (i < 100000000) && |
1730 | (*acknowledge == ((unsigned long)-1)); i++ ) | |
9b6b563c PM |
1731 | mb(); |
1732 | ||
493adffc | 1733 | if (*acknowledge == cpu_no) |
9b6b563c | 1734 | prom_printf("done\n"); |
bbd0abda | 1735 | else |
9b6b563c | 1736 | prom_printf("failed: %x\n", *acknowledge); |
9b6b563c PM |
1737 | } |
1738 | #ifdef CONFIG_SMP | |
1739 | else | |
493adffc | 1740 | prom_printf("boot cpu hw idx %lu\n", cpu_no); |
9b6b563c | 1741 | #endif /* CONFIG_SMP */ |
9b6b563c | 1742 | } |
9b6b563c | 1743 | |
9b6b563c | 1744 | prom_debug("prom_hold_cpus: end...\n"); |
9b6b563c PM |
1745 | } |
1746 | ||
1747 | ||
1748 | static void __init prom_init_client_services(unsigned long pp) | |
1749 | { | |
9b6b563c | 1750 | /* Get a handle to the prom entry point before anything else */ |
5827d416 | 1751 | prom_entry = pp; |
9b6b563c PM |
1752 | |
1753 | /* get a handle for the stdout device */ | |
5827d416 AB |
1754 | prom.chosen = call_prom("finddevice", 1, 1, ADDR("/chosen")); |
1755 | if (!PHANDLE_VALID(prom.chosen)) | |
9b6b563c PM |
1756 | prom_panic("cannot find chosen"); /* msg won't be printed :( */ |
1757 | ||
1758 | /* get device tree root */ | |
5827d416 AB |
1759 | prom.root = call_prom("finddevice", 1, 1, ADDR("/")); |
1760 | if (!PHANDLE_VALID(prom.root)) | |
9b6b563c | 1761 | prom_panic("cannot find device tree root"); /* msg won't be printed :( */ |
a575b807 | 1762 | |
5827d416 | 1763 | prom.mmumap = 0; |
a575b807 PM |
1764 | } |
1765 | ||
1766 | #ifdef CONFIG_PPC32 | |
1767 | /* | |
1768 | * For really old powermacs, we need to map things we claim. | |
1769 | * For that, we need the ihandle of the mmu. | |
a23414be | 1770 | * Also, on the longtrail, we need to work around other bugs. |
a575b807 PM |
1771 | */ |
1772 | static void __init prom_find_mmu(void) | |
1773 | { | |
a575b807 PM |
1774 | phandle oprom; |
1775 | char version[64]; | |
1776 | ||
1777 | oprom = call_prom("finddevice", 1, 1, ADDR("/openprom")); | |
1778 | if (!PHANDLE_VALID(oprom)) | |
1779 | return; | |
1780 | if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0) | |
1781 | return; | |
1782 | version[sizeof(version) - 1] = 0; | |
a575b807 | 1783 | /* XXX might need to add other versions here */ |
a23414be PM |
1784 | if (strcmp(version, "Open Firmware, 1.0.5") == 0) |
1785 | of_workarounds = OF_WA_CLAIM; | |
1786 | else if (strncmp(version, "FirmWorks,3.", 12) == 0) { | |
1787 | of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL; | |
1788 | call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim"); | |
1789 | } else | |
a575b807 | 1790 | return; |
5827d416 AB |
1791 | prom.memory = call_prom("open", 1, 1, ADDR("/memory")); |
1792 | prom_getprop(prom.chosen, "mmu", &prom.mmumap, | |
1793 | sizeof(prom.mmumap)); | |
493adffc | 1794 | prom.mmumap = be32_to_cpu(prom.mmumap); |
5827d416 | 1795 | if (!IHANDLE_VALID(prom.memory) || !IHANDLE_VALID(prom.mmumap)) |
a23414be | 1796 | of_workarounds &= ~OF_WA_CLAIM; /* hmmm */ |
9b6b563c | 1797 | } |
a575b807 PM |
1798 | #else |
1799 | #define prom_find_mmu() | |
1800 | #endif | |
9b6b563c PM |
1801 | |
1802 | static void __init prom_init_stdout(void) | |
1803 | { | |
5827d416 | 1804 | char *path = of_stdout_device; |
9b6b563c | 1805 | char type[16]; |
493adffc BH |
1806 | phandle stdout_node; |
1807 | __be32 val; | |
9b6b563c | 1808 | |
5827d416 | 1809 | if (prom_getprop(prom.chosen, "stdout", &val, sizeof(val)) <= 0) |
9b6b563c PM |
1810 | prom_panic("cannot find stdout"); |
1811 | ||
493adffc | 1812 | prom.stdout = be32_to_cpu(val); |
9b6b563c PM |
1813 | |
1814 | /* Get the full OF pathname of the stdout device */ | |
1815 | memset(path, 0, 256); | |
5827d416 | 1816 | call_prom("instance-to-path", 3, 1, prom.stdout, path, 255); |
5827d416 AB |
1817 | prom_printf("OF stdout device is: %s\n", of_stdout_device); |
1818 | prom_setprop(prom.chosen, "/chosen", "linux,stdout-path", | |
a23414be | 1819 | path, strlen(path) + 1); |
9b6b563c | 1820 | |
10348f59 BH |
1821 | /* instance-to-package fails on PA-Semi */ |
1822 | stdout_node = call_prom("instance-to-package", 1, 1, prom.stdout); | |
1823 | if (stdout_node != PROM_ERROR) { | |
1824 | val = cpu_to_be32(stdout_node); | |
1825 | prom_setprop(prom.chosen, "/chosen", "linux,stdout-package", | |
1826 | &val, sizeof(val)); | |
1827 | ||
1828 | /* If it's a display, note it */ | |
1829 | memset(type, 0, sizeof(type)); | |
1830 | prom_getprop(stdout_node, "device_type", type, sizeof(type)); | |
1831 | if (strcmp(type, "display") == 0) | |
1832 | prom_setprop(stdout_node, path, "linux,boot-display", NULL, 0); | |
1833 | } | |
9b6b563c PM |
1834 | } |
1835 | ||
9b6b563c PM |
1836 | static int __init prom_find_machine_type(void) |
1837 | { | |
9b6b563c PM |
1838 | char compat[256]; |
1839 | int len, i = 0; | |
21fe3301 | 1840 | #ifdef CONFIG_PPC64 |
9b6b563c | 1841 | phandle rtas; |
e8222502 | 1842 | int x; |
21fe3301 | 1843 | #endif |
e8222502 | 1844 | |
6e35d5da | 1845 | /* Look for a PowerMac or a Cell */ |
5827d416 | 1846 | len = prom_getprop(prom.root, "compatible", |
9b6b563c PM |
1847 | compat, sizeof(compat)-1); |
1848 | if (len > 0) { | |
1849 | compat[len] = 0; | |
1850 | while (i < len) { | |
1851 | char *p = &compat[i]; | |
1852 | int sl = strlen(p); | |
1853 | if (sl == 0) | |
1854 | break; | |
5827d416 AB |
1855 | if (strstr(p, "Power Macintosh") || |
1856 | strstr(p, "MacRISC")) | |
9b6b563c | 1857 | return PLATFORM_POWERMAC; |
133dda1e AB |
1858 | #ifdef CONFIG_PPC64 |
1859 | /* We must make sure we don't detect the IBM Cell | |
1860 | * blades as pSeries due to some firmware issues, | |
1861 | * so we do it here. | |
1862 | */ | |
5827d416 AB |
1863 | if (strstr(p, "IBM,CBEA") || |
1864 | strstr(p, "IBM,CPBW-1.0")) | |
133dda1e AB |
1865 | return PLATFORM_GENERIC; |
1866 | #endif /* CONFIG_PPC64 */ | |
9b6b563c PM |
1867 | i += sl + 1; |
1868 | } | |
1869 | } | |
1870 | #ifdef CONFIG_PPC64 | |
6e35d5da BH |
1871 | /* Try to detect OPAL */ |
1872 | if (PHANDLE_VALID(call_prom("finddevice", 1, 1, ADDR("/ibm,opal")))) | |
1873 | return PLATFORM_OPAL; | |
1874 | ||
1875 | /* Try to figure out if it's an IBM pSeries or any other | |
e8222502 BH |
1876 | * PAPR compliant platform. We assume it is if : |
1877 | * - /device_type is "chrp" (please, do NOT use that for future | |
1878 | * non-IBM designs ! | |
1879 | * - it has /rtas | |
1880 | */ | |
5827d416 | 1881 | len = prom_getprop(prom.root, "device_type", |
e8222502 BH |
1882 | compat, sizeof(compat)-1); |
1883 | if (len <= 0) | |
1884 | return PLATFORM_GENERIC; | |
5827d416 | 1885 | if (strcmp(compat, "chrp")) |
e8222502 BH |
1886 | return PLATFORM_GENERIC; |
1887 | ||
9b6b563c PM |
1888 | /* Default to pSeries. We need to know if we are running LPAR */ |
1889 | rtas = call_prom("finddevice", 1, 1, ADDR("/rtas")); | |
e8222502 BH |
1890 | if (!PHANDLE_VALID(rtas)) |
1891 | return PLATFORM_GENERIC; | |
1892 | x = prom_getproplen(rtas, "ibm,hypertas-functions"); | |
1893 | if (x != PROM_ERROR) { | |
4da727ae | 1894 | prom_debug("Hypertas detected, assuming LPAR !\n"); |
e8222502 | 1895 | return PLATFORM_PSERIES_LPAR; |
9b6b563c PM |
1896 | } |
1897 | return PLATFORM_PSERIES; | |
1898 | #else | |
e8222502 | 1899 | return PLATFORM_GENERIC; |
9b6b563c PM |
1900 | #endif |
1901 | } | |
1902 | ||
9b6b563c PM |
1903 | static int __init prom_set_color(ihandle ih, int i, int r, int g, int b) |
1904 | { | |
1905 | return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r); | |
1906 | } | |
1907 | ||
1908 | /* | |
1909 | * If we have a display that we don't know how to drive, | |
1910 | * we will want to try to execute OF's open method for it | |
1911 | * later. However, OF will probably fall over if we do that | |
1912 | * we've taken over the MMU. | |
1913 | * So we check whether we will need to open the display, | |
1914 | * and if so, open it now. | |
1915 | */ | |
1916 | static void __init prom_check_displays(void) | |
1917 | { | |
1918 | char type[16], *path; | |
1919 | phandle node; | |
1920 | ihandle ih; | |
1921 | int i; | |
9b6b563c PM |
1922 | |
1923 | static unsigned char default_colors[] = { | |
1924 | 0x00, 0x00, 0x00, | |
1925 | 0x00, 0x00, 0xaa, | |
1926 | 0x00, 0xaa, 0x00, | |
1927 | 0x00, 0xaa, 0xaa, | |
1928 | 0xaa, 0x00, 0x00, | |
1929 | 0xaa, 0x00, 0xaa, | |
1930 | 0xaa, 0xaa, 0x00, | |
1931 | 0xaa, 0xaa, 0xaa, | |
1932 | 0x55, 0x55, 0x55, | |
1933 | 0x55, 0x55, 0xff, | |
1934 | 0x55, 0xff, 0x55, | |
1935 | 0x55, 0xff, 0xff, | |
1936 | 0xff, 0x55, 0x55, | |
1937 | 0xff, 0x55, 0xff, | |
1938 | 0xff, 0xff, 0x55, | |
1939 | 0xff, 0xff, 0xff | |
1940 | }; | |
1941 | const unsigned char *clut; | |
1942 | ||
4da727ae | 1943 | prom_debug("Looking for displays\n"); |
9b6b563c PM |
1944 | for (node = 0; prom_next_node(&node); ) { |
1945 | memset(type, 0, sizeof(type)); | |
1946 | prom_getprop(node, "device_type", type, sizeof(type)); | |
5827d416 | 1947 | if (strcmp(type, "display") != 0) |
9b6b563c PM |
1948 | continue; |
1949 | ||
1950 | /* It seems OF doesn't null-terminate the path :-( */ | |
5827d416 | 1951 | path = prom_scratch; |
9b6b563c PM |
1952 | memset(path, 0, PROM_SCRATCH_SIZE); |
1953 | ||
1954 | /* | |
1955 | * leave some room at the end of the path for appending extra | |
1956 | * arguments | |
1957 | */ | |
1958 | if (call_prom("package-to-path", 3, 1, node, path, | |
1959 | PROM_SCRATCH_SIZE-10) == PROM_ERROR) | |
1960 | continue; | |
1f8737aa | 1961 | prom_printf("found display : %s, opening... ", path); |
9b6b563c PM |
1962 | |
1963 | ih = call_prom("open", 1, 1, path); | |
1964 | if (ih == 0) { | |
1965 | prom_printf("failed\n"); | |
1966 | continue; | |
1967 | } | |
1968 | ||
1969 | /* Success */ | |
1970 | prom_printf("done\n"); | |
a23414be | 1971 | prom_setprop(node, path, "linux,opened", NULL, 0); |
9b6b563c PM |
1972 | |
1973 | /* Setup a usable color table when the appropriate | |
1974 | * method is available. Should update this to set-colors */ | |
5827d416 | 1975 | clut = default_colors; |
3f53638c | 1976 | for (i = 0; i < 16; i++, clut += 3) |
9b6b563c PM |
1977 | if (prom_set_color(ih, i, clut[0], clut[1], |
1978 | clut[2]) != 0) | |
1979 | break; | |
1980 | ||
1981 | #ifdef CONFIG_LOGO_LINUX_CLUT224 | |
5827d416 AB |
1982 | clut = PTRRELOC(logo_linux_clut224.clut); |
1983 | for (i = 0; i < logo_linux_clut224.clutsize; i++, clut += 3) | |
9b6b563c PM |
1984 | if (prom_set_color(ih, i + 32, clut[0], clut[1], |
1985 | clut[2]) != 0) | |
1986 | break; | |
1987 | #endif /* CONFIG_LOGO_LINUX_CLUT224 */ | |
7191b615 BH |
1988 | |
1989 | #ifdef CONFIG_PPC_EARLY_DEBUG_BOOTX | |
1990 | if (prom_getprop(node, "linux,boot-display", NULL, 0) != | |
1991 | PROM_ERROR) { | |
1992 | u32 width, height, pitch, addr; | |
1993 | ||
1994 | prom_printf("Setting btext !\n"); | |
1995 | prom_getprop(node, "width", &width, 4); | |
1996 | prom_getprop(node, "height", &height, 4); | |
1997 | prom_getprop(node, "linebytes", &pitch, 4); | |
1998 | prom_getprop(node, "address", &addr, 4); | |
1999 | prom_printf("W=%d H=%d LB=%d addr=0x%x\n", | |
2000 | width, height, pitch, addr); | |
2001 | btext_setup_display(width, height, 8, pitch, addr); | |
2002 | } | |
2003 | #endif /* CONFIG_PPC_EARLY_DEBUG_BOOTX */ | |
9b6b563c PM |
2004 | } |
2005 | } | |
2006 | ||
2007 | ||
2008 | /* Return (relocated) pointer to this much memory: moves initrd if reqd. */ | |
2009 | static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end, | |
2010 | unsigned long needed, unsigned long align) | |
2011 | { | |
2012 | void *ret; | |
2013 | ||
2014 | *mem_start = _ALIGN(*mem_start, align); | |
2015 | while ((*mem_start + needed) > *mem_end) { | |
2016 | unsigned long room, chunk; | |
2017 | ||
2018 | prom_debug("Chunk exhausted, claiming more at %x...\n", | |
5827d416 AB |
2019 | alloc_bottom); |
2020 | room = alloc_top - alloc_bottom; | |
9b6b563c PM |
2021 | if (room > DEVTREE_CHUNK_SIZE) |
2022 | room = DEVTREE_CHUNK_SIZE; | |
2023 | if (room < PAGE_SIZE) | |
fbafd728 AB |
2024 | prom_panic("No memory for flatten_device_tree " |
2025 | "(no room)\n"); | |
9b6b563c PM |
2026 | chunk = alloc_up(room, 0); |
2027 | if (chunk == 0) | |
fbafd728 AB |
2028 | prom_panic("No memory for flatten_device_tree " |
2029 | "(claim failed)\n"); | |
966728dd | 2030 | *mem_end = chunk + room; |
9b6b563c PM |
2031 | } |
2032 | ||
2033 | ret = (void *)*mem_start; | |
2034 | *mem_start += needed; | |
2035 | ||
2036 | return ret; | |
2037 | } | |
2038 | ||
493adffc BH |
2039 | #define dt_push_token(token, mem_start, mem_end) do { \ |
2040 | void *room = make_room(mem_start, mem_end, 4, 4); \ | |
2041 | *(__be32 *)room = cpu_to_be32(token); \ | |
2042 | } while(0) | |
9b6b563c PM |
2043 | |
2044 | static unsigned long __init dt_find_string(char *str) | |
2045 | { | |
2046 | char *s, *os; | |
2047 | ||
5827d416 | 2048 | s = os = (char *)dt_string_start; |
9b6b563c | 2049 | s += 4; |
5827d416 | 2050 | while (s < (char *)dt_string_end) { |
9b6b563c PM |
2051 | if (strcmp(s, str) == 0) |
2052 | return s - os; | |
2053 | s += strlen(s) + 1; | |
2054 | } | |
2055 | return 0; | |
2056 | } | |
2057 | ||
2058 | /* | |
2059 | * The Open Firmware 1275 specification states properties must be 31 bytes or | |
2060 | * less, however not all firmwares obey this. Make it 64 bytes to be safe. | |
2061 | */ | |
2062 | #define MAX_PROPERTY_NAME 64 | |
2063 | ||
2064 | static void __init scan_dt_build_strings(phandle node, | |
2065 | unsigned long *mem_start, | |
2066 | unsigned long *mem_end) | |
2067 | { | |
2068 | char *prev_name, *namep, *sstart; | |
2069 | unsigned long soff; | |
2070 | phandle child; | |
2071 | ||
5827d416 | 2072 | sstart = (char *)dt_string_start; |
9b6b563c PM |
2073 | |
2074 | /* get and store all property names */ | |
5827d416 | 2075 | prev_name = ""; |
9b6b563c PM |
2076 | for (;;) { |
2077 | /* 64 is max len of name including nul. */ | |
2078 | namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1); | |
2079 | if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) { | |
2080 | /* No more nodes: unwind alloc */ | |
2081 | *mem_start = (unsigned long)namep; | |
2082 | break; | |
2083 | } | |
2084 | ||
2085 | /* skip "name" */ | |
5827d416 | 2086 | if (strcmp(namep, "name") == 0) { |
9b6b563c | 2087 | *mem_start = (unsigned long)namep; |
5827d416 | 2088 | prev_name = "name"; |
9b6b563c PM |
2089 | continue; |
2090 | } | |
2091 | /* get/create string entry */ | |
2092 | soff = dt_find_string(namep); | |
2093 | if (soff != 0) { | |
2094 | *mem_start = (unsigned long)namep; | |
2095 | namep = sstart + soff; | |
2096 | } else { | |
2097 | /* Trim off some if we can */ | |
2098 | *mem_start = (unsigned long)namep + strlen(namep) + 1; | |
5827d416 | 2099 | dt_string_end = *mem_start; |
9b6b563c PM |
2100 | } |
2101 | prev_name = namep; | |
2102 | } | |
2103 | ||
2104 | /* do all our children */ | |
2105 | child = call_prom("child", 1, 1, node); | |
2106 | while (child != 0) { | |
2107 | scan_dt_build_strings(child, mem_start, mem_end); | |
2108 | child = call_prom("peer", 1, 1, child); | |
2109 | } | |
2110 | } | |
2111 | ||
2112 | static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start, | |
2113 | unsigned long *mem_end) | |
2114 | { | |
2115 | phandle child; | |
2116 | char *namep, *prev_name, *sstart, *p, *ep, *lp, *path; | |
2117 | unsigned long soff; | |
2118 | unsigned char *valp; | |
2119 | static char pname[MAX_PROPERTY_NAME]; | |
6e35d5da | 2120 | int l, room, has_phandle = 0; |
9b6b563c PM |
2121 | |
2122 | dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end); | |
2123 | ||
2124 | /* get the node's full name */ | |
2125 | namep = (char *)*mem_start; | |
c4988820 PM |
2126 | room = *mem_end - *mem_start; |
2127 | if (room > 255) | |
2128 | room = 255; | |
2129 | l = call_prom("package-to-path", 3, 1, node, namep, room); | |
9b6b563c PM |
2130 | if (l >= 0) { |
2131 | /* Didn't fit? Get more room. */ | |
c4988820 PM |
2132 | if (l >= room) { |
2133 | if (l >= *mem_end - *mem_start) | |
2134 | namep = make_room(mem_start, mem_end, l+1, 1); | |
9b6b563c PM |
2135 | call_prom("package-to-path", 3, 1, node, namep, l); |
2136 | } | |
2137 | namep[l] = '\0'; | |
2138 | ||
2139 | /* Fixup an Apple bug where they have bogus \0 chars in the | |
a575b807 PM |
2140 | * middle of the path in some properties, and extract |
2141 | * the unit name (everything after the last '/'). | |
9b6b563c | 2142 | */ |
a575b807 | 2143 | for (lp = p = namep, ep = namep + l; p < ep; p++) { |
9b6b563c | 2144 | if (*p == '/') |
a575b807 PM |
2145 | lp = namep; |
2146 | else if (*p != 0) | |
2147 | *lp++ = *p; | |
2148 | } | |
2149 | *lp = 0; | |
2150 | *mem_start = _ALIGN((unsigned long)lp + 1, 4); | |
9b6b563c PM |
2151 | } |
2152 | ||
2153 | /* get it again for debugging */ | |
5827d416 | 2154 | path = prom_scratch; |
9b6b563c PM |
2155 | memset(path, 0, PROM_SCRATCH_SIZE); |
2156 | call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); | |
2157 | ||
2158 | /* get and store all properties */ | |
5827d416 AB |
2159 | prev_name = ""; |
2160 | sstart = (char *)dt_string_start; | |
9b6b563c PM |
2161 | for (;;) { |
2162 | if (call_prom("nextprop", 3, 1, node, prev_name, | |
5827d416 | 2163 | pname) != 1) |
9b6b563c PM |
2164 | break; |
2165 | ||
2166 | /* skip "name" */ | |
5827d416 AB |
2167 | if (strcmp(pname, "name") == 0) { |
2168 | prev_name = "name"; | |
9b6b563c PM |
2169 | continue; |
2170 | } | |
2171 | ||
2172 | /* find string offset */ | |
5827d416 | 2173 | soff = dt_find_string(pname); |
9b6b563c PM |
2174 | if (soff == 0) { |
2175 | prom_printf("WARNING: Can't find string index for" | |
5827d416 | 2176 | " <%s>, node %s\n", pname, path); |
9b6b563c PM |
2177 | break; |
2178 | } | |
2179 | prev_name = sstart + soff; | |
2180 | ||
2181 | /* get length */ | |
5827d416 | 2182 | l = call_prom("getproplen", 2, 1, node, pname); |
9b6b563c PM |
2183 | |
2184 | /* sanity checks */ | |
2185 | if (l == PROM_ERROR) | |
2186 | continue; | |
9b6b563c PM |
2187 | |
2188 | /* push property head */ | |
2189 | dt_push_token(OF_DT_PROP, mem_start, mem_end); | |
2190 | dt_push_token(l, mem_start, mem_end); | |
2191 | dt_push_token(soff, mem_start, mem_end); | |
2192 | ||
2193 | /* push property content */ | |
2194 | valp = make_room(mem_start, mem_end, l, 4); | |
5827d416 | 2195 | call_prom("getprop", 4, 1, node, pname, valp, l); |
9b6b563c | 2196 | *mem_start = _ALIGN(*mem_start, 4); |
6e35d5da | 2197 | |
5827d416 | 2198 | if (!strcmp(pname, "phandle")) |
6e35d5da | 2199 | has_phandle = 1; |
9b6b563c PM |
2200 | } |
2201 | ||
6e35d5da BH |
2202 | /* Add a "linux,phandle" property if no "phandle" property already |
2203 | * existed (can happen with OPAL) | |
2204 | */ | |
2205 | if (!has_phandle) { | |
5827d416 | 2206 | soff = dt_find_string("linux,phandle"); |
6e35d5da BH |
2207 | if (soff == 0) |
2208 | prom_printf("WARNING: Can't find string index for" | |
2209 | " <linux-phandle> node %s\n", path); | |
2210 | else { | |
2211 | dt_push_token(OF_DT_PROP, mem_start, mem_end); | |
2212 | dt_push_token(4, mem_start, mem_end); | |
2213 | dt_push_token(soff, mem_start, mem_end); | |
2214 | valp = make_room(mem_start, mem_end, 4, 4); | |
493adffc | 2215 | *(__be32 *)valp = cpu_to_be32(node); |
6e35d5da | 2216 | } |
9b6b563c PM |
2217 | } |
2218 | ||
2219 | /* do all our children */ | |
2220 | child = call_prom("child", 1, 1, node); | |
2221 | while (child != 0) { | |
2222 | scan_dt_build_struct(child, mem_start, mem_end); | |
2223 | child = call_prom("peer", 1, 1, child); | |
2224 | } | |
2225 | ||
2226 | dt_push_token(OF_DT_END_NODE, mem_start, mem_end); | |
2227 | } | |
2228 | ||
2229 | static void __init flatten_device_tree(void) | |
2230 | { | |
2231 | phandle root; | |
2232 | unsigned long mem_start, mem_end, room; | |
2233 | struct boot_param_header *hdr; | |
9b6b563c PM |
2234 | char *namep; |
2235 | u64 *rsvmap; | |
2236 | ||
2237 | /* | |
2238 | * Check how much room we have between alloc top & bottom (+/- a | |
fbafd728 | 2239 | * few pages), crop to 1MB, as this is our "chunk" size |
9b6b563c | 2240 | */ |
5827d416 | 2241 | room = alloc_top - alloc_bottom - 0x4000; |
9b6b563c PM |
2242 | if (room > DEVTREE_CHUNK_SIZE) |
2243 | room = DEVTREE_CHUNK_SIZE; | |
5827d416 | 2244 | prom_debug("starting device tree allocs at %x\n", alloc_bottom); |
9b6b563c PM |
2245 | |
2246 | /* Now try to claim that */ | |
2247 | mem_start = (unsigned long)alloc_up(room, PAGE_SIZE); | |
2248 | if (mem_start == 0) | |
2249 | prom_panic("Can't allocate initial device-tree chunk\n"); | |
966728dd | 2250 | mem_end = mem_start + room; |
9b6b563c PM |
2251 | |
2252 | /* Get root of tree */ | |
2253 | root = call_prom("peer", 1, 1, (phandle)0); | |
2254 | if (root == (phandle)0) | |
2255 | prom_panic ("couldn't get device tree root\n"); | |
2256 | ||
2257 | /* Build header and make room for mem rsv map */ | |
2258 | mem_start = _ALIGN(mem_start, 4); | |
2259 | hdr = make_room(&mem_start, &mem_end, | |
2260 | sizeof(struct boot_param_header), 4); | |
5827d416 | 2261 | dt_header_start = (unsigned long)hdr; |
9b6b563c PM |
2262 | rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8); |
2263 | ||
2264 | /* Start of strings */ | |
2265 | mem_start = PAGE_ALIGN(mem_start); | |
5827d416 | 2266 | dt_string_start = mem_start; |
9b6b563c PM |
2267 | mem_start += 4; /* hole */ |
2268 | ||
2269 | /* Add "linux,phandle" in there, we'll need it */ | |
2270 | namep = make_room(&mem_start, &mem_end, 16, 1); | |
5827d416 | 2271 | strcpy(namep, "linux,phandle"); |
9b6b563c PM |
2272 | mem_start = (unsigned long)namep + strlen(namep) + 1; |
2273 | ||
2274 | /* Build string array */ | |
2275 | prom_printf("Building dt strings...\n"); | |
2276 | scan_dt_build_strings(root, &mem_start, &mem_end); | |
5827d416 | 2277 | dt_string_end = mem_start; |
9b6b563c PM |
2278 | |
2279 | /* Build structure */ | |
2280 | mem_start = PAGE_ALIGN(mem_start); | |
5827d416 | 2281 | dt_struct_start = mem_start; |
9b6b563c PM |
2282 | prom_printf("Building dt structure...\n"); |
2283 | scan_dt_build_struct(root, &mem_start, &mem_end); | |
2284 | dt_push_token(OF_DT_END, &mem_start, &mem_end); | |
5827d416 | 2285 | dt_struct_end = PAGE_ALIGN(mem_start); |
9b6b563c PM |
2286 | |
2287 | /* Finish header */ | |
493adffc BH |
2288 | hdr->boot_cpuid_phys = cpu_to_be32(prom.cpu); |
2289 | hdr->magic = cpu_to_be32(OF_DT_HEADER); | |
2290 | hdr->totalsize = cpu_to_be32(dt_struct_end - dt_header_start); | |
2291 | hdr->off_dt_struct = cpu_to_be32(dt_struct_start - dt_header_start); | |
2292 | hdr->off_dt_strings = cpu_to_be32(dt_string_start - dt_header_start); | |
2293 | hdr->dt_strings_size = cpu_to_be32(dt_string_end - dt_string_start); | |
2294 | hdr->off_mem_rsvmap = cpu_to_be32(((unsigned long)rsvmap) - dt_header_start); | |
2295 | hdr->version = cpu_to_be32(OF_DT_VERSION); | |
9b6b563c | 2296 | /* Version 16 is not backward compatible */ |
493adffc | 2297 | hdr->last_comp_version = cpu_to_be32(0x10); |
9b6b563c | 2298 | |
4d1f3f25 | 2299 | /* Copy the reserve map in */ |
5827d416 | 2300 | memcpy(rsvmap, mem_reserve_map, sizeof(mem_reserve_map)); |
9b6b563c PM |
2301 | |
2302 | #ifdef DEBUG_PROM | |
2303 | { | |
2304 | int i; | |
2305 | prom_printf("reserved memory map:\n"); | |
5827d416 | 2306 | for (i = 0; i < mem_reserve_cnt; i++) |
9b6b563c | 2307 | prom_printf(" %x - %x\n", |
493adffc BH |
2308 | be64_to_cpu(mem_reserve_map[i].base), |
2309 | be64_to_cpu(mem_reserve_map[i].size)); | |
9b6b563c PM |
2310 | } |
2311 | #endif | |
4d1f3f25 JX |
2312 | /* Bump mem_reserve_cnt to cause further reservations to fail |
2313 | * since it's too late. | |
2314 | */ | |
5827d416 | 2315 | mem_reserve_cnt = MEM_RESERVE_MAP_SIZE; |
9b6b563c PM |
2316 | |
2317 | prom_printf("Device tree strings 0x%x -> 0x%x\n", | |
5827d416 | 2318 | dt_string_start, dt_string_end); |
9b6b563c | 2319 | prom_printf("Device tree struct 0x%x -> 0x%x\n", |
5827d416 | 2320 | dt_struct_start, dt_struct_end); |
9b6b563c PM |
2321 | } |
2322 | ||
54f4ee18 HB |
2323 | #ifdef CONFIG_PPC_MAPLE |
2324 | /* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property. | |
2325 | * The values are bad, and it doesn't even have the right number of cells. */ | |
2326 | static void __init fixup_device_tree_maple(void) | |
9b6b563c | 2327 | { |
54f4ee18 | 2328 | phandle isa; |
980a6513 | 2329 | u32 rloc = 0x01002000; /* IO space; PCI device = 4 */ |
54f4ee18 | 2330 | u32 isa_ranges[6]; |
980a6513 BH |
2331 | char *name; |
2332 | ||
2333 | name = "/ht@0/isa@4"; | |
2334 | isa = call_prom("finddevice", 1, 1, ADDR(name)); | |
2335 | if (!PHANDLE_VALID(isa)) { | |
2336 | name = "/ht@0/isa@6"; | |
2337 | isa = call_prom("finddevice", 1, 1, ADDR(name)); | |
2338 | rloc = 0x01003000; /* IO space; PCI device = 6 */ | |
2339 | } | |
54f4ee18 HB |
2340 | if (!PHANDLE_VALID(isa)) |
2341 | return; | |
2342 | ||
980a6513 BH |
2343 | if (prom_getproplen(isa, "ranges") != 12) |
2344 | return; | |
54f4ee18 HB |
2345 | if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges)) |
2346 | == PROM_ERROR) | |
2347 | return; | |
2348 | ||
2349 | if (isa_ranges[0] != 0x1 || | |
2350 | isa_ranges[1] != 0xf4000000 || | |
2351 | isa_ranges[2] != 0x00010000) | |
2352 | return; | |
2353 | ||
980a6513 | 2354 | prom_printf("Fixing up bogus ISA range on Maple/Apache...\n"); |
54f4ee18 HB |
2355 | |
2356 | isa_ranges[0] = 0x1; | |
2357 | isa_ranges[1] = 0x0; | |
980a6513 | 2358 | isa_ranges[2] = rloc; |
54f4ee18 HB |
2359 | isa_ranges[3] = 0x0; |
2360 | isa_ranges[4] = 0x0; | |
2361 | isa_ranges[5] = 0x00010000; | |
980a6513 | 2362 | prom_setprop(isa, name, "ranges", |
54f4ee18 HB |
2363 | isa_ranges, sizeof(isa_ranges)); |
2364 | } | |
8f101a05 HC |
2365 | |
2366 | #define CPC925_MC_START 0xf8000000 | |
2367 | #define CPC925_MC_LENGTH 0x1000000 | |
2368 | /* The values for memory-controller don't have right number of cells */ | |
2369 | static void __init fixup_device_tree_maple_memory_controller(void) | |
2370 | { | |
2371 | phandle mc; | |
2372 | u32 mc_reg[4]; | |
2373 | char *name = "/hostbridge@f8000000"; | |
8f101a05 HC |
2374 | u32 ac, sc; |
2375 | ||
2376 | mc = call_prom("finddevice", 1, 1, ADDR(name)); | |
2377 | if (!PHANDLE_VALID(mc)) | |
2378 | return; | |
2379 | ||
2380 | if (prom_getproplen(mc, "reg") != 8) | |
2381 | return; | |
2382 | ||
5827d416 AB |
2383 | prom_getprop(prom.root, "#address-cells", &ac, sizeof(ac)); |
2384 | prom_getprop(prom.root, "#size-cells", &sc, sizeof(sc)); | |
8f101a05 HC |
2385 | if ((ac != 2) || (sc != 2)) |
2386 | return; | |
2387 | ||
2388 | if (prom_getprop(mc, "reg", mc_reg, sizeof(mc_reg)) == PROM_ERROR) | |
2389 | return; | |
2390 | ||
2391 | if (mc_reg[0] != CPC925_MC_START || mc_reg[1] != CPC925_MC_LENGTH) | |
2392 | return; | |
2393 | ||
2394 | prom_printf("Fixing up bogus hostbridge on Maple...\n"); | |
2395 | ||
2396 | mc_reg[0] = 0x0; | |
2397 | mc_reg[1] = CPC925_MC_START; | |
2398 | mc_reg[2] = 0x0; | |
2399 | mc_reg[3] = CPC925_MC_LENGTH; | |
2400 | prom_setprop(mc, name, "reg", mc_reg, sizeof(mc_reg)); | |
2401 | } | |
54f4ee18 HB |
2402 | #else |
2403 | #define fixup_device_tree_maple() | |
8f101a05 | 2404 | #define fixup_device_tree_maple_memory_controller() |
54f4ee18 HB |
2405 | #endif |
2406 | ||
e8c0acf9 | 2407 | #ifdef CONFIG_PPC_CHRP |
e4805922 OH |
2408 | /* |
2409 | * Pegasos and BriQ lacks the "ranges" property in the isa node | |
2410 | * Pegasos needs decimal IRQ 14/15, not hexadecimal | |
556ecf9b | 2411 | * Pegasos has the IDE configured in legacy mode, but advertised as native |
e4805922 | 2412 | */ |
e8c0acf9 BH |
2413 | static void __init fixup_device_tree_chrp(void) |
2414 | { | |
e4805922 OH |
2415 | phandle ph; |
2416 | u32 prop[6]; | |
26c5032e | 2417 | u32 rloc = 0x01006000; /* IO space; PCI device = 12 */ |
e8c0acf9 BH |
2418 | char *name; |
2419 | int rc; | |
2420 | ||
2421 | name = "/pci@80000000/isa@c"; | |
e4805922 OH |
2422 | ph = call_prom("finddevice", 1, 1, ADDR(name)); |
2423 | if (!PHANDLE_VALID(ph)) { | |
26c5032e | 2424 | name = "/pci@ff500000/isa@6"; |
e4805922 | 2425 | ph = call_prom("finddevice", 1, 1, ADDR(name)); |
26c5032e BH |
2426 | rloc = 0x01003000; /* IO space; PCI device = 6 */ |
2427 | } | |
e4805922 OH |
2428 | if (PHANDLE_VALID(ph)) { |
2429 | rc = prom_getproplen(ph, "ranges"); | |
2430 | if (rc == 0 || rc == PROM_ERROR) { | |
2431 | prom_printf("Fixing up missing ISA range on Pegasos...\n"); | |
2432 | ||
2433 | prop[0] = 0x1; | |
2434 | prop[1] = 0x0; | |
2435 | prop[2] = rloc; | |
2436 | prop[3] = 0x0; | |
2437 | prop[4] = 0x0; | |
2438 | prop[5] = 0x00010000; | |
2439 | prom_setprop(ph, name, "ranges", prop, sizeof(prop)); | |
2440 | } | |
2441 | } | |
e8c0acf9 | 2442 | |
e4805922 OH |
2443 | name = "/pci@80000000/ide@C,1"; |
2444 | ph = call_prom("finddevice", 1, 1, ADDR(name)); | |
2445 | if (PHANDLE_VALID(ph)) { | |
2446 | prom_printf("Fixing up IDE interrupt on Pegasos...\n"); | |
2447 | prop[0] = 14; | |
2448 | prop[1] = 0x0; | |
556ecf9b OH |
2449 | prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32)); |
2450 | prom_printf("Fixing up IDE class-code on Pegasos...\n"); | |
2451 | rc = prom_getprop(ph, "class-code", prop, sizeof(u32)); | |
2452 | if (rc == sizeof(u32)) { | |
2453 | prop[0] &= ~0x5; | |
2454 | prom_setprop(ph, name, "class-code", prop, sizeof(u32)); | |
2455 | } | |
e4805922 | 2456 | } |
e8c0acf9 BH |
2457 | } |
2458 | #else | |
2459 | #define fixup_device_tree_chrp() | |
2460 | #endif | |
2461 | ||
9b6b563c | 2462 | #if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC) |
54f4ee18 HB |
2463 | static void __init fixup_device_tree_pmac(void) |
2464 | { | |
9b6b563c PM |
2465 | phandle u3, i2c, mpic; |
2466 | u32 u3_rev; | |
2467 | u32 interrupts[2]; | |
2468 | u32 parent; | |
2469 | ||
2470 | /* Some G5s have a missing interrupt definition, fix it up here */ | |
2471 | u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000")); | |
2472 | if (!PHANDLE_VALID(u3)) | |
2473 | return; | |
2474 | i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000")); | |
2475 | if (!PHANDLE_VALID(i2c)) | |
2476 | return; | |
2477 | mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000")); | |
2478 | if (!PHANDLE_VALID(mpic)) | |
2479 | return; | |
2480 | ||
2481 | /* check if proper rev of u3 */ | |
2482 | if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev)) | |
2483 | == PROM_ERROR) | |
2484 | return; | |
7d49697e | 2485 | if (u3_rev < 0x35 || u3_rev > 0x39) |
9b6b563c PM |
2486 | return; |
2487 | /* does it need fixup ? */ | |
2488 | if (prom_getproplen(i2c, "interrupts") > 0) | |
2489 | return; | |
2490 | ||
2491 | prom_printf("fixing up bogus interrupts for u3 i2c...\n"); | |
2492 | ||
2493 | /* interrupt on this revision of u3 is number 0 and level */ | |
2494 | interrupts[0] = 0; | |
2495 | interrupts[1] = 1; | |
a23414be PM |
2496 | prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts", |
2497 | &interrupts, sizeof(interrupts)); | |
9b6b563c | 2498 | parent = (u32)mpic; |
a23414be PM |
2499 | prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent", |
2500 | &parent, sizeof(parent)); | |
9b6b563c | 2501 | } |
54f4ee18 HB |
2502 | #else |
2503 | #define fixup_device_tree_pmac() | |
2504 | #endif | |
9b6b563c | 2505 | |
88fd2a9d | 2506 | #ifdef CONFIG_PPC_EFIKA |
94d2dde7 GL |
2507 | /* |
2508 | * The MPC5200 FEC driver requires an phy-handle property to tell it how | |
2509 | * to talk to the phy. If the phy-handle property is missing, then this | |
2510 | * function is called to add the appropriate nodes and link it to the | |
2511 | * ethernet node. | |
2512 | */ | |
2513 | static void __init fixup_device_tree_efika_add_phy(void) | |
88fd2a9d | 2514 | { |
88fd2a9d SM |
2515 | u32 node; |
2516 | char prop[64]; | |
94d2dde7 | 2517 | int rv; |
88fd2a9d | 2518 | |
94d2dde7 GL |
2519 | /* Check if /builtin/ethernet exists - bail if it doesn't */ |
2520 | node = call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet")); | |
88fd2a9d SM |
2521 | if (!PHANDLE_VALID(node)) |
2522 | return; | |
2523 | ||
94d2dde7 GL |
2524 | /* Check if the phy-handle property exists - bail if it does */ |
2525 | rv = prom_getprop(node, "phy-handle", prop, sizeof(prop)); | |
2526 | if (!rv) | |
88fd2a9d SM |
2527 | return; |
2528 | ||
94d2dde7 GL |
2529 | /* |
2530 | * At this point the ethernet device doesn't have a phy described. | |
2531 | * Now we need to add the missing phy node and linkage | |
2532 | */ | |
6f4347c9 | 2533 | |
94d2dde7 | 2534 | /* Check for an MDIO bus node - if missing then create one */ |
6f4347c9 OH |
2535 | node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio")); |
2536 | if (!PHANDLE_VALID(node)) { | |
2537 | prom_printf("Adding Ethernet MDIO node\n"); | |
2538 | call_prom("interpret", 1, 1, | |
2539 | " s\" /builtin\" find-device" | |
2540 | " new-device" | |
2541 | " 1 encode-int s\" #address-cells\" property" | |
2542 | " 0 encode-int s\" #size-cells\" property" | |
94d2dde7 GL |
2543 | " s\" mdio\" device-name" |
2544 | " s\" fsl,mpc5200b-mdio\" encode-string" | |
6f4347c9 OH |
2545 | " s\" compatible\" property" |
2546 | " 0xf0003000 0x400 reg" | |
2547 | " 0x2 encode-int" | |
2548 | " 0x5 encode-int encode+" | |
2549 | " 0x3 encode-int encode+" | |
2550 | " s\" interrupts\" property" | |
2551 | " finish-device"); | |
2552 | }; | |
2553 | ||
94d2dde7 GL |
2554 | /* Check for a PHY device node - if missing then create one and |
2555 | * give it's phandle to the ethernet node */ | |
2556 | node = call_prom("finddevice", 1, 1, | |
2557 | ADDR("/builtin/mdio/ethernet-phy")); | |
6f4347c9 OH |
2558 | if (!PHANDLE_VALID(node)) { |
2559 | prom_printf("Adding Ethernet PHY node\n"); | |
2560 | call_prom("interpret", 1, 1, | |
2561 | " s\" /builtin/mdio\" find-device" | |
2562 | " new-device" | |
2563 | " s\" ethernet-phy\" device-name" | |
2564 | " 0x10 encode-int s\" reg\" property" | |
2565 | " my-self" | |
2566 | " ihandle>phandle" | |
2567 | " finish-device" | |
2568 | " s\" /builtin/ethernet\" find-device" | |
2569 | " encode-int" | |
2570 | " s\" phy-handle\" property" | |
2571 | " device-end"); | |
2572 | } | |
94d2dde7 GL |
2573 | } |
2574 | ||
2575 | static void __init fixup_device_tree_efika(void) | |
2576 | { | |
2577 | int sound_irq[3] = { 2, 2, 0 }; | |
2578 | int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0, | |
2579 | 3,4,0, 3,5,0, 3,6,0, 3,7,0, | |
2580 | 3,8,0, 3,9,0, 3,10,0, 3,11,0, | |
2581 | 3,12,0, 3,13,0, 3,14,0, 3,15,0 }; | |
2582 | u32 node; | |
2583 | char prop[64]; | |
2584 | int rv, len; | |
2585 | ||
2586 | /* Check if we're really running on a EFIKA */ | |
2587 | node = call_prom("finddevice", 1, 1, ADDR("/")); | |
2588 | if (!PHANDLE_VALID(node)) | |
2589 | return; | |
2590 | ||
2591 | rv = prom_getprop(node, "model", prop, sizeof(prop)); | |
2592 | if (rv == PROM_ERROR) | |
2593 | return; | |
2594 | if (strcmp(prop, "EFIKA5K2")) | |
2595 | return; | |
2596 | ||
2597 | prom_printf("Applying EFIKA device tree fixups\n"); | |
2598 | ||
2599 | /* Claiming to be 'chrp' is death */ | |
2600 | node = call_prom("finddevice", 1, 1, ADDR("/")); | |
2601 | rv = prom_getprop(node, "device_type", prop, sizeof(prop)); | |
2602 | if (rv != PROM_ERROR && (strcmp(prop, "chrp") == 0)) | |
2603 | prom_setprop(node, "/", "device_type", "efika", sizeof("efika")); | |
2604 | ||
7f4392cd DW |
2605 | /* CODEGEN,description is exposed in /proc/cpuinfo so |
2606 | fix that too */ | |
2607 | rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop)); | |
2608 | if (rv != PROM_ERROR && (strstr(prop, "CHRP"))) | |
2609 | prom_setprop(node, "/", "CODEGEN,description", | |
2610 | "Efika 5200B PowerPC System", | |
2611 | sizeof("Efika 5200B PowerPC System")); | |
2612 | ||
94d2dde7 GL |
2613 | /* Fixup bestcomm interrupts property */ |
2614 | node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm")); | |
2615 | if (PHANDLE_VALID(node)) { | |
2616 | len = prom_getproplen(node, "interrupts"); | |
2617 | if (len == 12) { | |
2618 | prom_printf("Fixing bestcomm interrupts property\n"); | |
2619 | prom_setprop(node, "/builtin/bestcom", "interrupts", | |
2620 | bcomm_irq, sizeof(bcomm_irq)); | |
2621 | } | |
2622 | } | |
2623 | ||
2624 | /* Fixup sound interrupts property */ | |
2625 | node = call_prom("finddevice", 1, 1, ADDR("/builtin/sound")); | |
2626 | if (PHANDLE_VALID(node)) { | |
2627 | rv = prom_getprop(node, "interrupts", prop, sizeof(prop)); | |
2628 | if (rv == PROM_ERROR) { | |
2629 | prom_printf("Adding sound interrupts property\n"); | |
2630 | prom_setprop(node, "/builtin/sound", "interrupts", | |
2631 | sound_irq, sizeof(sound_irq)); | |
2632 | } | |
2633 | } | |
6f4347c9 | 2634 | |
94d2dde7 GL |
2635 | /* Make sure ethernet phy-handle property exists */ |
2636 | fixup_device_tree_efika_add_phy(); | |
88fd2a9d SM |
2637 | } |
2638 | #else | |
2639 | #define fixup_device_tree_efika() | |
2640 | #endif | |
2641 | ||
54f4ee18 HB |
2642 | static void __init fixup_device_tree(void) |
2643 | { | |
2644 | fixup_device_tree_maple(); | |
8f101a05 | 2645 | fixup_device_tree_maple_memory_controller(); |
e8c0acf9 | 2646 | fixup_device_tree_chrp(); |
54f4ee18 | 2647 | fixup_device_tree_pmac(); |
88fd2a9d | 2648 | fixup_device_tree_efika(); |
54f4ee18 | 2649 | } |
9b6b563c PM |
2650 | |
2651 | static void __init prom_find_boot_cpu(void) | |
2652 | { | |
493adffc | 2653 | __be32 rval; |
9b6b563c PM |
2654 | ihandle prom_cpu; |
2655 | phandle cpu_pkg; | |
2656 | ||
493adffc BH |
2657 | rval = 0; |
2658 | if (prom_getprop(prom.chosen, "cpu", &rval, sizeof(rval)) <= 0) | |
a575b807 | 2659 | return; |
493adffc | 2660 | prom_cpu = be32_to_cpu(rval); |
9b6b563c PM |
2661 | |
2662 | cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu); | |
2663 | ||
493adffc BH |
2664 | prom_getprop(cpu_pkg, "reg", &rval, sizeof(rval)); |
2665 | prom.cpu = be32_to_cpu(rval); | |
9b6b563c | 2666 | |
5827d416 | 2667 | prom_debug("Booting CPU hw index = %lu\n", prom.cpu); |
9b6b563c PM |
2668 | } |
2669 | ||
2670 | static void __init prom_check_initrd(unsigned long r3, unsigned long r4) | |
2671 | { | |
2672 | #ifdef CONFIG_BLK_DEV_INITRD | |
9b6b563c | 2673 | if (r3 && r4 && r4 != 0xdeadbeef) { |
493adffc | 2674 | __be64 val; |
9b6b563c | 2675 | |
5827d416 AB |
2676 | prom_initrd_start = is_kernel_addr(r3) ? __pa(r3) : r3; |
2677 | prom_initrd_end = prom_initrd_start + r4; | |
9b6b563c | 2678 | |
493adffc | 2679 | val = cpu_to_be64(prom_initrd_start); |
5827d416 | 2680 | prom_setprop(prom.chosen, "/chosen", "linux,initrd-start", |
a23414be | 2681 | &val, sizeof(val)); |
493adffc | 2682 | val = cpu_to_be64(prom_initrd_end); |
5827d416 | 2683 | prom_setprop(prom.chosen, "/chosen", "linux,initrd-end", |
a23414be | 2684 | &val, sizeof(val)); |
9b6b563c | 2685 | |
5827d416 AB |
2686 | reserve_mem(prom_initrd_start, |
2687 | prom_initrd_end - prom_initrd_start); | |
9b6b563c | 2688 | |
5827d416 AB |
2689 | prom_debug("initrd_start=0x%x\n", prom_initrd_start); |
2690 | prom_debug("initrd_end=0x%x\n", prom_initrd_end); | |
9b6b563c PM |
2691 | } |
2692 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
2693 | } | |
2694 | ||
5ac47f7a AB |
2695 | #ifdef CONFIG_PPC64 |
2696 | #ifdef CONFIG_RELOCATABLE | |
2697 | static void reloc_toc(void) | |
2698 | { | |
2699 | } | |
2700 | ||
2701 | static void unreloc_toc(void) | |
2702 | { | |
2703 | } | |
2704 | #else | |
1674400a | 2705 | static void __reloc_toc(unsigned long offset, unsigned long nr_entries) |
5ac47f7a AB |
2706 | { |
2707 | unsigned long i; | |
1674400a AB |
2708 | unsigned long *toc_entry; |
2709 | ||
2710 | /* Get the start of the TOC by using r2 directly. */ | |
2711 | asm volatile("addi %0,2,-0x8000" : "=b" (toc_entry)); | |
5ac47f7a AB |
2712 | |
2713 | for (i = 0; i < nr_entries; i++) { | |
2714 | *toc_entry = *toc_entry + offset; | |
2715 | toc_entry++; | |
2716 | } | |
2717 | } | |
2718 | ||
2719 | static void reloc_toc(void) | |
2720 | { | |
2721 | unsigned long offset = reloc_offset(); | |
2722 | unsigned long nr_entries = | |
2723 | (__prom_init_toc_end - __prom_init_toc_start) / sizeof(long); | |
2724 | ||
1674400a | 2725 | __reloc_toc(offset, nr_entries); |
5ac47f7a AB |
2726 | |
2727 | mb(); | |
2728 | } | |
2729 | ||
2730 | static void unreloc_toc(void) | |
2731 | { | |
2732 | unsigned long offset = reloc_offset(); | |
2733 | unsigned long nr_entries = | |
2734 | (__prom_init_toc_end - __prom_init_toc_start) / sizeof(long); | |
2735 | ||
2736 | mb(); | |
2737 | ||
1674400a | 2738 | __reloc_toc(-offset, nr_entries); |
5ac47f7a AB |
2739 | } |
2740 | #endif | |
2741 | #endif | |
27f44888 | 2742 | |
9b6b563c PM |
2743 | /* |
2744 | * We enter here early on, when the Open Firmware prom is still | |
2745 | * handling exceptions and the MMU hash table for us. | |
2746 | */ | |
2747 | ||
2748 | unsigned long __init prom_init(unsigned long r3, unsigned long r4, | |
2749 | unsigned long pp, | |
549e8152 PM |
2750 | unsigned long r6, unsigned long r7, |
2751 | unsigned long kbase) | |
9b6b563c | 2752 | { |
9b6b563c | 2753 | unsigned long hdr; |
9b6b563c PM |
2754 | |
2755 | #ifdef CONFIG_PPC32 | |
549e8152 | 2756 | unsigned long offset = reloc_offset(); |
9b6b563c | 2757 | reloc_got2(offset); |
5ac47f7a AB |
2758 | #else |
2759 | reloc_toc(); | |
9b6b563c PM |
2760 | #endif |
2761 | ||
9b6b563c PM |
2762 | /* |
2763 | * First zero the BSS | |
2764 | */ | |
5827d416 | 2765 | memset(&__bss_start, 0, __bss_stop - __bss_start); |
9b6b563c PM |
2766 | |
2767 | /* | |
2768 | * Init interface to Open Firmware, get some node references, | |
2769 | * like /chosen | |
2770 | */ | |
2771 | prom_init_client_services(pp); | |
2772 | ||
2773 | /* | |
a23414be PM |
2774 | * See if this OF is old enough that we need to do explicit maps |
2775 | * and other workarounds | |
9b6b563c | 2776 | */ |
a23414be | 2777 | prom_find_mmu(); |
9b6b563c | 2778 | |
a575b807 | 2779 | /* |
a23414be | 2780 | * Init prom stdout device |
a575b807 | 2781 | */ |
a23414be | 2782 | prom_init_stdout(); |
a575b807 | 2783 | |
5827d416 | 2784 | prom_printf("Preparing to boot %s", linux_banner); |
e7943fbb | 2785 | |
9b6b563c PM |
2786 | /* |
2787 | * Get default machine type. At this point, we do not differentiate | |
2788 | * between pSeries SMP and pSeries LPAR | |
2789 | */ | |
5827d416 AB |
2790 | of_platform = prom_find_machine_type(); |
2791 | prom_printf("Detected machine type: %x\n", of_platform); | |
9b6b563c | 2792 | |
0f890c8d | 2793 | #ifndef CONFIG_NONSTATIC_KERNEL |
add60ef3 OH |
2794 | /* Bail if this is a kdump kernel. */ |
2795 | if (PHYSICAL_START > 0) | |
2796 | prom_panic("Error: You can't boot a kdump kernel from OF!\n"); | |
549e8152 | 2797 | #endif |
add60ef3 OH |
2798 | |
2799 | /* | |
2800 | * Check for an initrd | |
2801 | */ | |
2802 | prom_check_initrd(r3, r4); | |
2803 | ||
27f44888 | 2804 | #if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) |
9b6b563c PM |
2805 | /* |
2806 | * On pSeries, inform the firmware about our capabilities | |
2807 | */ | |
5827d416 AB |
2808 | if (of_platform == PLATFORM_PSERIES || |
2809 | of_platform == PLATFORM_PSERIES_LPAR) | |
9b6b563c PM |
2810 | prom_send_capabilities(); |
2811 | #endif | |
2812 | ||
9b6b563c | 2813 | /* |
f3f66f59 | 2814 | * Copy the CPU hold code |
9b6b563c | 2815 | */ |
5827d416 | 2816 | if (of_platform != PLATFORM_POWERMAC) |
549e8152 | 2817 | copy_and_flush(0, kbase, 0x100, 0); |
9b6b563c PM |
2818 | |
2819 | /* | |
2820 | * Do early parsing of command line | |
2821 | */ | |
2822 | early_cmdline_parse(); | |
2823 | ||
2824 | /* | |
2825 | * Initialize memory management within prom_init | |
2826 | */ | |
2827 | prom_init_mem(); | |
2828 | ||
2829 | /* | |
2830 | * Determine which cpu is actually running right _now_ | |
2831 | */ | |
2832 | prom_find_boot_cpu(); | |
2833 | ||
2834 | /* | |
2835 | * Initialize display devices | |
2836 | */ | |
2837 | prom_check_displays(); | |
2838 | ||
493adffc | 2839 | #if defined(CONFIG_PPC64) && defined(__BIG_ENDIAN__) |
9b6b563c PM |
2840 | /* |
2841 | * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else | |
2842 | * that uses the allocator, we need to make sure we get the top of memory | |
2843 | * available for us here... | |
2844 | */ | |
5827d416 | 2845 | if (of_platform == PLATFORM_PSERIES) |
9b6b563c PM |
2846 | prom_initialize_tce_table(); |
2847 | #endif | |
2848 | ||
2849 | /* | |
27f44888 BH |
2850 | * On non-powermacs, try to instantiate RTAS. PowerMacs don't |
2851 | * have a usable RTAS implementation. | |
9b6b563c | 2852 | */ |
5827d416 AB |
2853 | if (of_platform != PLATFORM_POWERMAC && |
2854 | of_platform != PLATFORM_OPAL) | |
9b6b563c | 2855 | prom_instantiate_rtas(); |
27f44888 BH |
2856 | |
2857 | #ifdef CONFIG_PPC_POWERNV | |
493adffc | 2858 | if (of_platform == PLATFORM_OPAL) |
6e35d5da | 2859 | prom_instantiate_opal(); |
493adffc | 2860 | #endif /* CONFIG_PPC_POWERNV */ |
27f44888 | 2861 | |
4a727429 AL |
2862 | #ifdef CONFIG_PPC64 |
2863 | /* instantiate sml */ | |
2864 | prom_instantiate_sml(); | |
2865 | #endif | |
2866 | ||
27f44888 BH |
2867 | /* |
2868 | * On non-powermacs, put all CPUs in spin-loops. | |
2869 | * | |
2870 | * PowerMacs use a different mechanism to spin CPUs | |
dbe78b40 BH |
2871 | * |
2872 | * (This must be done after instanciating RTAS) | |
27f44888 | 2873 | */ |
5827d416 AB |
2874 | if (of_platform != PLATFORM_POWERMAC && |
2875 | of_platform != PLATFORM_OPAL) | |
27f44888 | 2876 | prom_hold_cpus(); |
9b6b563c PM |
2877 | |
2878 | /* | |
2879 | * Fill in some infos for use by the kernel later on | |
2880 | */ | |
493adffc BH |
2881 | if (prom_memory_limit) { |
2882 | __be64 val = cpu_to_be64(prom_memory_limit); | |
5827d416 | 2883 | prom_setprop(prom.chosen, "/chosen", "linux,memory-limit", |
493adffc BH |
2884 | &val, sizeof(val)); |
2885 | } | |
9b6b563c | 2886 | #ifdef CONFIG_PPC64 |
5827d416 AB |
2887 | if (prom_iommu_off) |
2888 | prom_setprop(prom.chosen, "/chosen", "linux,iommu-off", | |
a23414be | 2889 | NULL, 0); |
9b6b563c | 2890 | |
5827d416 AB |
2891 | if (prom_iommu_force_on) |
2892 | prom_setprop(prom.chosen, "/chosen", "linux,iommu-force-on", | |
a23414be | 2893 | NULL, 0); |
9b6b563c | 2894 | |
5827d416 AB |
2895 | if (prom_tce_alloc_start) { |
2896 | prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-start", | |
2897 | &prom_tce_alloc_start, | |
9b6b563c | 2898 | sizeof(prom_tce_alloc_start)); |
5827d416 AB |
2899 | prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-end", |
2900 | &prom_tce_alloc_end, | |
9b6b563c PM |
2901 | sizeof(prom_tce_alloc_end)); |
2902 | } | |
2903 | #endif | |
2904 | ||
2905 | /* | |
2906 | * Fixup any known bugs in the device-tree | |
2907 | */ | |
2908 | fixup_device_tree(); | |
2909 | ||
2910 | /* | |
2911 | * Now finally create the flattened device-tree | |
2912 | */ | |
1f8737aa | 2913 | prom_printf("copying OF device tree...\n"); |
9b6b563c PM |
2914 | flatten_device_tree(); |
2915 | ||
3825ac0e PM |
2916 | /* |
2917 | * in case stdin is USB and still active on IBM machines... | |
2918 | * Unfortunately quiesce crashes on some powermacs if we have | |
40dfef66 BH |
2919 | * closed stdin already (in particular the powerbook 101). It |
2920 | * appears that the OPAL version of OFW doesn't like it either. | |
3825ac0e | 2921 | */ |
5827d416 AB |
2922 | if (of_platform != PLATFORM_POWERMAC && |
2923 | of_platform != PLATFORM_OPAL) | |
3825ac0e | 2924 | prom_close_stdin(); |
9b6b563c PM |
2925 | |
2926 | /* | |
2927 | * Call OF "quiesce" method to shut down pending DMA's from | |
2928 | * devices etc... | |
2929 | */ | |
7e862d7e | 2930 | prom_printf("Quiescing Open Firmware ...\n"); |
9b6b563c PM |
2931 | call_prom("quiesce", 0, 0); |
2932 | ||
2933 | /* | |
2934 | * And finally, call the kernel passing it the flattened device | |
2935 | * tree and NULL as r5, thus triggering the new entry point which | |
2936 | * is common to us and kexec | |
2937 | */ | |
5827d416 | 2938 | hdr = dt_header_start; |
40dfef66 BH |
2939 | |
2940 | /* Don't print anything after quiesce under OPAL, it crashes OFW */ | |
5827d416 | 2941 | if (of_platform != PLATFORM_OPAL) { |
7e862d7e | 2942 | prom_printf("Booting Linux via __start() ...\n"); |
40dfef66 BH |
2943 | prom_debug("->dt_header_start=0x%x\n", hdr); |
2944 | } | |
9b6b563c PM |
2945 | |
2946 | #ifdef CONFIG_PPC32 | |
2947 | reloc_got2(-offset); | |
5ac47f7a AB |
2948 | #else |
2949 | unreloc_toc(); | |
9b6b563c PM |
2950 | #endif |
2951 | ||
6e35d5da BH |
2952 | #ifdef CONFIG_PPC_EARLY_DEBUG_OPAL |
2953 | /* OPAL early debug gets the OPAL base & entry in r8 and r9 */ | |
2954 | __start(hdr, kbase, 0, 0, 0, | |
5827d416 | 2955 | prom_opal_base, prom_opal_entry); |
6e35d5da BH |
2956 | #else |
2957 | __start(hdr, kbase, 0, 0, 0, 0, 0); | |
2958 | #endif | |
9b6b563c PM |
2959 | |
2960 | return 0; | |
2961 | } |