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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> | |
38 | #include <asm/system.h> | |
39 | #include <asm/mmu.h> | |
40 | #include <asm/pgtable.h> | |
41 | #include <asm/pci.h> | |
42 | #include <asm/iommu.h> | |
9b6b563c PM |
43 | #include <asm/btext.h> |
44 | #include <asm/sections.h> | |
45 | #include <asm/machdep.h> | |
46 | ||
9b6b563c | 47 | #include <linux/linux_logo.h> |
9b6b563c PM |
48 | |
49 | /* | |
50 | * Properties whose value is longer than this get excluded from our | |
51 | * copy of the device tree. This value does need to be big enough to | |
52 | * ensure that we don't lose things like the interrupt-map property | |
53 | * on a PCI-PCI bridge. | |
54 | */ | |
55 | #define MAX_PROPERTY_LENGTH (1UL * 1024 * 1024) | |
56 | ||
57 | /* | |
58 | * Eventually bump that one up | |
59 | */ | |
60 | #define DEVTREE_CHUNK_SIZE 0x100000 | |
61 | ||
62 | /* | |
63 | * This is the size of the local memory reserve map that gets copied | |
64 | * into the boot params passed to the kernel. That size is totally | |
65 | * flexible as the kernel just reads the list until it encounters an | |
66 | * entry with size 0, so it can be changed without breaking binary | |
67 | * compatibility | |
68 | */ | |
69 | #define MEM_RESERVE_MAP_SIZE 8 | |
70 | ||
71 | /* | |
72 | * prom_init() is called very early on, before the kernel text | |
73 | * and data have been mapped to KERNELBASE. At this point the code | |
74 | * is running at whatever address it has been loaded at. | |
75 | * On ppc32 we compile with -mrelocatable, which means that references | |
76 | * to extern and static variables get relocated automatically. | |
77 | * On ppc64 we have to relocate the references explicitly with | |
78 | * RELOC. (Note that strings count as static variables.) | |
79 | * | |
80 | * Because OF may have mapped I/O devices into the area starting at | |
81 | * KERNELBASE, particularly on CHRP machines, we can't safely call | |
82 | * OF once the kernel has been mapped to KERNELBASE. Therefore all | |
83 | * OF calls must be done within prom_init(). | |
84 | * | |
85 | * ADDR is used in calls to call_prom. The 4th and following | |
86 | * arguments to call_prom should be 32-bit values. | |
87 | * On ppc64, 64 bit values are truncated to 32 bits (and | |
88 | * fortunately don't get interpreted as two arguments). | |
89 | */ | |
90 | #ifdef CONFIG_PPC64 | |
91 | #define RELOC(x) (*PTRRELOC(&(x))) | |
92 | #define ADDR(x) (u32) add_reloc_offset((unsigned long)(x)) | |
a23414be | 93 | #define OF_WORKAROUNDS 0 |
9b6b563c PM |
94 | #else |
95 | #define RELOC(x) (x) | |
96 | #define ADDR(x) (u32) (x) | |
a23414be PM |
97 | #define OF_WORKAROUNDS of_workarounds |
98 | int of_workarounds; | |
9b6b563c PM |
99 | #endif |
100 | ||
a23414be PM |
101 | #define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */ |
102 | #define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */ | |
103 | ||
9b6b563c PM |
104 | #define PROM_BUG() do { \ |
105 | prom_printf("kernel BUG at %s line 0x%x!\n", \ | |
106 | RELOC(__FILE__), __LINE__); \ | |
107 | __asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \ | |
108 | } while (0) | |
109 | ||
110 | #ifdef DEBUG_PROM | |
111 | #define prom_debug(x...) prom_printf(x) | |
112 | #else | |
113 | #define prom_debug(x...) | |
114 | #endif | |
115 | ||
9b6b563c PM |
116 | |
117 | typedef u32 prom_arg_t; | |
118 | ||
119 | struct prom_args { | |
120 | u32 service; | |
121 | u32 nargs; | |
122 | u32 nret; | |
123 | prom_arg_t args[10]; | |
124 | }; | |
125 | ||
126 | struct prom_t { | |
127 | ihandle root; | |
a23414be | 128 | phandle chosen; |
9b6b563c PM |
129 | int cpu; |
130 | ihandle stdout; | |
a575b807 | 131 | ihandle mmumap; |
a23414be | 132 | ihandle memory; |
9b6b563c PM |
133 | }; |
134 | ||
135 | struct mem_map_entry { | |
cbbcf340 KG |
136 | u64 base; |
137 | u64 size; | |
9b6b563c PM |
138 | }; |
139 | ||
140 | typedef u32 cell_t; | |
141 | ||
142 | extern void __start(unsigned long r3, unsigned long r4, unsigned long r5); | |
143 | ||
144 | #ifdef CONFIG_PPC64 | |
c4988820 | 145 | extern int enter_prom(struct prom_args *args, unsigned long entry); |
9b6b563c | 146 | #else |
c4988820 | 147 | static inline int enter_prom(struct prom_args *args, unsigned long entry) |
9b6b563c | 148 | { |
c4988820 | 149 | return ((int (*)(struct prom_args *))entry)(args); |
9b6b563c PM |
150 | } |
151 | #endif | |
152 | ||
153 | extern void copy_and_flush(unsigned long dest, unsigned long src, | |
154 | unsigned long size, unsigned long offset); | |
155 | ||
156 | /* prom structure */ | |
157 | static struct prom_t __initdata prom; | |
158 | ||
159 | static unsigned long prom_entry __initdata; | |
160 | ||
161 | #define PROM_SCRATCH_SIZE 256 | |
162 | ||
163 | static char __initdata of_stdout_device[256]; | |
164 | static char __initdata prom_scratch[PROM_SCRATCH_SIZE]; | |
165 | ||
166 | static unsigned long __initdata dt_header_start; | |
167 | static unsigned long __initdata dt_struct_start, dt_struct_end; | |
168 | static unsigned long __initdata dt_string_start, dt_string_end; | |
169 | ||
170 | static unsigned long __initdata prom_initrd_start, prom_initrd_end; | |
171 | ||
172 | #ifdef CONFIG_PPC64 | |
165785e5 JK |
173 | static int __initdata prom_iommu_force_on; |
174 | static int __initdata prom_iommu_off; | |
9b6b563c PM |
175 | static unsigned long __initdata prom_tce_alloc_start; |
176 | static unsigned long __initdata prom_tce_alloc_end; | |
177 | #endif | |
178 | ||
e8222502 BH |
179 | /* Platforms codes are now obsolete in the kernel. Now only used within this |
180 | * file and ultimately gone too. Feel free to change them if you need, they | |
181 | * are not shared with anything outside of this file anymore | |
182 | */ | |
183 | #define PLATFORM_PSERIES 0x0100 | |
184 | #define PLATFORM_PSERIES_LPAR 0x0101 | |
185 | #define PLATFORM_LPAR 0x0001 | |
186 | #define PLATFORM_POWERMAC 0x0400 | |
187 | #define PLATFORM_GENERIC 0x0500 | |
188 | ||
9b6b563c PM |
189 | static int __initdata of_platform; |
190 | ||
191 | static char __initdata prom_cmd_line[COMMAND_LINE_SIZE]; | |
192 | ||
cf68787b BK |
193 | static unsigned long __initdata prom_memory_limit; |
194 | ||
9b6b563c PM |
195 | static unsigned long __initdata alloc_top; |
196 | static unsigned long __initdata alloc_top_high; | |
197 | static unsigned long __initdata alloc_bottom; | |
198 | static unsigned long __initdata rmo_top; | |
199 | static unsigned long __initdata ram_top; | |
200 | ||
201 | static struct mem_map_entry __initdata mem_reserve_map[MEM_RESERVE_MAP_SIZE]; | |
202 | static int __initdata mem_reserve_cnt; | |
203 | ||
204 | static cell_t __initdata regbuf[1024]; | |
205 | ||
206 | ||
9b6b563c PM |
207 | /* |
208 | * Error results ... some OF calls will return "-1" on error, some | |
209 | * will return 0, some will return either. To simplify, here are | |
210 | * macros to use with any ihandle or phandle return value to check if | |
211 | * it is valid | |
212 | */ | |
213 | ||
214 | #define PROM_ERROR (-1u) | |
215 | #define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR) | |
216 | #define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR) | |
217 | ||
218 | ||
219 | /* This is the one and *ONLY* place where we actually call open | |
220 | * firmware. | |
221 | */ | |
222 | ||
223 | static int __init call_prom(const char *service, int nargs, int nret, ...) | |
224 | { | |
225 | int i; | |
226 | struct prom_args args; | |
227 | va_list list; | |
228 | ||
229 | args.service = ADDR(service); | |
230 | args.nargs = nargs; | |
231 | args.nret = nret; | |
232 | ||
233 | va_start(list, nret); | |
234 | for (i = 0; i < nargs; i++) | |
235 | args.args[i] = va_arg(list, prom_arg_t); | |
236 | va_end(list); | |
237 | ||
238 | for (i = 0; i < nret; i++) | |
239 | args.args[nargs+i] = 0; | |
240 | ||
c4988820 PM |
241 | if (enter_prom(&args, RELOC(prom_entry)) < 0) |
242 | return PROM_ERROR; | |
9b6b563c PM |
243 | |
244 | return (nret > 0) ? args.args[nargs] : 0; | |
245 | } | |
246 | ||
247 | static int __init call_prom_ret(const char *service, int nargs, int nret, | |
248 | prom_arg_t *rets, ...) | |
249 | { | |
250 | int i; | |
251 | struct prom_args args; | |
252 | va_list list; | |
253 | ||
254 | args.service = ADDR(service); | |
255 | args.nargs = nargs; | |
256 | args.nret = nret; | |
257 | ||
258 | va_start(list, rets); | |
259 | for (i = 0; i < nargs; i++) | |
260 | args.args[i] = va_arg(list, prom_arg_t); | |
261 | va_end(list); | |
262 | ||
263 | for (i = 0; i < nret; i++) | |
ed1189b7 | 264 | args.args[nargs+i] = 0; |
9b6b563c | 265 | |
c4988820 PM |
266 | if (enter_prom(&args, RELOC(prom_entry)) < 0) |
267 | return PROM_ERROR; | |
9b6b563c PM |
268 | |
269 | if (rets != NULL) | |
270 | for (i = 1; i < nret; ++i) | |
c5200c90 | 271 | rets[i-1] = args.args[nargs+i]; |
9b6b563c PM |
272 | |
273 | return (nret > 0) ? args.args[nargs] : 0; | |
274 | } | |
275 | ||
276 | ||
9b6b563c PM |
277 | static void __init prom_print(const char *msg) |
278 | { | |
279 | const char *p, *q; | |
280 | struct prom_t *_prom = &RELOC(prom); | |
281 | ||
282 | if (_prom->stdout == 0) | |
283 | return; | |
284 | ||
285 | for (p = msg; *p != 0; p = q) { | |
286 | for (q = p; *q != 0 && *q != '\n'; ++q) | |
287 | ; | |
288 | if (q > p) | |
289 | call_prom("write", 3, 1, _prom->stdout, p, q - p); | |
290 | if (*q == 0) | |
291 | break; | |
292 | ++q; | |
293 | call_prom("write", 3, 1, _prom->stdout, ADDR("\r\n"), 2); | |
294 | } | |
295 | } | |
296 | ||
297 | ||
298 | static void __init prom_print_hex(unsigned long val) | |
299 | { | |
300 | int i, nibbles = sizeof(val)*2; | |
301 | char buf[sizeof(val)*2+1]; | |
302 | struct prom_t *_prom = &RELOC(prom); | |
303 | ||
304 | for (i = nibbles-1; i >= 0; i--) { | |
305 | buf[i] = (val & 0xf) + '0'; | |
306 | if (buf[i] > '9') | |
307 | buf[i] += ('a'-'0'-10); | |
308 | val >>= 4; | |
309 | } | |
310 | buf[nibbles] = '\0'; | |
311 | call_prom("write", 3, 1, _prom->stdout, buf, nibbles); | |
312 | } | |
313 | ||
314 | ||
315 | static void __init prom_printf(const char *format, ...) | |
316 | { | |
317 | const char *p, *q, *s; | |
318 | va_list args; | |
319 | unsigned long v; | |
320 | struct prom_t *_prom = &RELOC(prom); | |
321 | ||
322 | va_start(args, format); | |
323 | #ifdef CONFIG_PPC64 | |
324 | format = PTRRELOC(format); | |
325 | #endif | |
326 | for (p = format; *p != 0; p = q) { | |
327 | for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q) | |
328 | ; | |
329 | if (q > p) | |
330 | call_prom("write", 3, 1, _prom->stdout, p, q - p); | |
331 | if (*q == 0) | |
332 | break; | |
333 | if (*q == '\n') { | |
334 | ++q; | |
335 | call_prom("write", 3, 1, _prom->stdout, | |
336 | ADDR("\r\n"), 2); | |
337 | continue; | |
338 | } | |
339 | ++q; | |
340 | if (*q == 0) | |
341 | break; | |
342 | switch (*q) { | |
343 | case 's': | |
344 | ++q; | |
345 | s = va_arg(args, const char *); | |
346 | prom_print(s); | |
347 | break; | |
348 | case 'x': | |
349 | ++q; | |
350 | v = va_arg(args, unsigned long); | |
351 | prom_print_hex(v); | |
352 | break; | |
353 | } | |
354 | } | |
355 | } | |
356 | ||
357 | ||
a575b807 PM |
358 | static unsigned int __init prom_claim(unsigned long virt, unsigned long size, |
359 | unsigned long align) | |
360 | { | |
a575b807 PM |
361 | struct prom_t *_prom = &RELOC(prom); |
362 | ||
a23414be PM |
363 | if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) { |
364 | /* | |
365 | * Old OF requires we claim physical and virtual separately | |
366 | * and then map explicitly (assuming virtual mode) | |
367 | */ | |
368 | int ret; | |
369 | prom_arg_t result; | |
370 | ||
371 | ret = call_prom_ret("call-method", 5, 2, &result, | |
372 | ADDR("claim"), _prom->memory, | |
373 | align, size, virt); | |
374 | if (ret != 0 || result == -1) | |
375 | return -1; | |
376 | ret = call_prom_ret("call-method", 5, 2, &result, | |
377 | ADDR("claim"), _prom->mmumap, | |
378 | align, size, virt); | |
379 | if (ret != 0) { | |
380 | call_prom("call-method", 4, 1, ADDR("release"), | |
381 | _prom->memory, size, virt); | |
382 | return -1; | |
383 | } | |
384 | /* the 0x12 is M (coherence) + PP == read/write */ | |
a575b807 | 385 | call_prom("call-method", 6, 1, |
a23414be PM |
386 | ADDR("map"), _prom->mmumap, 0x12, size, virt, virt); |
387 | return virt; | |
388 | } | |
389 | return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size, | |
390 | (prom_arg_t)align); | |
a575b807 PM |
391 | } |
392 | ||
9b6b563c PM |
393 | static void __init __attribute__((noreturn)) prom_panic(const char *reason) |
394 | { | |
395 | #ifdef CONFIG_PPC64 | |
396 | reason = PTRRELOC(reason); | |
397 | #endif | |
398 | prom_print(reason); | |
add60ef3 OH |
399 | /* Do not call exit because it clears the screen on pmac |
400 | * it also causes some sort of double-fault on early pmacs */ | |
401 | if (RELOC(of_platform) == PLATFORM_POWERMAC) | |
402 | asm("trap\n"); | |
403 | ||
9b6b563c PM |
404 | /* ToDo: should put up an SRC here on p/iSeries */ |
405 | call_prom("exit", 0, 0); | |
406 | ||
407 | for (;;) /* should never get here */ | |
408 | ; | |
409 | } | |
410 | ||
411 | ||
412 | static int __init prom_next_node(phandle *nodep) | |
413 | { | |
414 | phandle node; | |
415 | ||
416 | if ((node = *nodep) != 0 | |
417 | && (*nodep = call_prom("child", 1, 1, node)) != 0) | |
418 | return 1; | |
419 | if ((*nodep = call_prom("peer", 1, 1, node)) != 0) | |
420 | return 1; | |
421 | for (;;) { | |
422 | if ((node = call_prom("parent", 1, 1, node)) == 0) | |
423 | return 0; | |
424 | if ((*nodep = call_prom("peer", 1, 1, node)) != 0) | |
425 | return 1; | |
426 | } | |
427 | } | |
428 | ||
21fe3301 | 429 | static int inline prom_getprop(phandle node, const char *pname, |
9b6b563c PM |
430 | void *value, size_t valuelen) |
431 | { | |
432 | return call_prom("getprop", 4, 1, node, ADDR(pname), | |
433 | (u32)(unsigned long) value, (u32) valuelen); | |
434 | } | |
435 | ||
21fe3301 | 436 | static int inline prom_getproplen(phandle node, const char *pname) |
9b6b563c PM |
437 | { |
438 | return call_prom("getproplen", 2, 1, node, ADDR(pname)); | |
439 | } | |
440 | ||
a23414be | 441 | static void add_string(char **str, const char *q) |
9b6b563c | 442 | { |
a23414be PM |
443 | char *p = *str; |
444 | ||
445 | while (*q) | |
446 | *p++ = *q++; | |
447 | *p++ = ' '; | |
448 | *str = p; | |
449 | } | |
450 | ||
451 | static char *tohex(unsigned int x) | |
452 | { | |
453 | static char digits[] = "0123456789abcdef"; | |
454 | static char result[9]; | |
455 | int i; | |
456 | ||
457 | result[8] = 0; | |
458 | i = 8; | |
459 | do { | |
460 | --i; | |
461 | result[i] = digits[x & 0xf]; | |
462 | x >>= 4; | |
463 | } while (x != 0 && i > 0); | |
464 | return &result[i]; | |
465 | } | |
466 | ||
467 | static int __init prom_setprop(phandle node, const char *nodename, | |
468 | const char *pname, void *value, size_t valuelen) | |
469 | { | |
470 | char cmd[256], *p; | |
471 | ||
472 | if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL)) | |
473 | return call_prom("setprop", 4, 1, node, ADDR(pname), | |
474 | (u32)(unsigned long) value, (u32) valuelen); | |
475 | ||
476 | /* gah... setprop doesn't work on longtrail, have to use interpret */ | |
477 | p = cmd; | |
478 | add_string(&p, "dev"); | |
479 | add_string(&p, nodename); | |
480 | add_string(&p, tohex((u32)(unsigned long) value)); | |
481 | add_string(&p, tohex(valuelen)); | |
482 | add_string(&p, tohex(ADDR(pname))); | |
483 | add_string(&p, tohex(strlen(RELOC(pname)))); | |
484 | add_string(&p, "property"); | |
485 | *p = 0; | |
486 | return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd); | |
9b6b563c PM |
487 | } |
488 | ||
cf68787b BK |
489 | /* We can't use the standard versions because of RELOC headaches. */ |
490 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ | |
491 | || ('a' <= (c) && (c) <= 'f') \ | |
492 | || ('A' <= (c) && (c) <= 'F')) | |
493 | ||
494 | #define isdigit(c) ('0' <= (c) && (c) <= '9') | |
495 | #define islower(c) ('a' <= (c) && (c) <= 'z') | |
496 | #define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c)) | |
497 | ||
498 | unsigned long prom_strtoul(const char *cp, const char **endp) | |
499 | { | |
500 | unsigned long result = 0, base = 10, value; | |
501 | ||
502 | if (*cp == '0') { | |
503 | base = 8; | |
504 | cp++; | |
505 | if (toupper(*cp) == 'X') { | |
506 | cp++; | |
507 | base = 16; | |
508 | } | |
509 | } | |
510 | ||
511 | while (isxdigit(*cp) && | |
512 | (value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) { | |
513 | result = result * base + value; | |
514 | cp++; | |
515 | } | |
516 | ||
517 | if (endp) | |
518 | *endp = cp; | |
519 | ||
520 | return result; | |
521 | } | |
522 | ||
523 | unsigned long prom_memparse(const char *ptr, const char **retptr) | |
524 | { | |
525 | unsigned long ret = prom_strtoul(ptr, retptr); | |
526 | int shift = 0; | |
527 | ||
528 | /* | |
529 | * We can't use a switch here because GCC *may* generate a | |
530 | * jump table which won't work, because we're not running at | |
531 | * the address we're linked at. | |
532 | */ | |
533 | if ('G' == **retptr || 'g' == **retptr) | |
534 | shift = 30; | |
535 | ||
536 | if ('M' == **retptr || 'm' == **retptr) | |
537 | shift = 20; | |
538 | ||
539 | if ('K' == **retptr || 'k' == **retptr) | |
540 | shift = 10; | |
541 | ||
542 | if (shift) { | |
543 | ret <<= shift; | |
544 | (*retptr)++; | |
545 | } | |
546 | ||
547 | return ret; | |
548 | } | |
549 | ||
9b6b563c PM |
550 | /* |
551 | * Early parsing of the command line passed to the kernel, used for | |
552 | * "mem=x" and the options that affect the iommu | |
553 | */ | |
554 | static void __init early_cmdline_parse(void) | |
555 | { | |
556 | struct prom_t *_prom = &RELOC(prom); | |
cc5d0189 | 557 | const char *opt; |
cf68787b | 558 | |
cc5d0189 | 559 | char *p; |
9b6b563c PM |
560 | int l = 0; |
561 | ||
562 | RELOC(prom_cmd_line[0]) = 0; | |
563 | p = RELOC(prom_cmd_line); | |
564 | if ((long)_prom->chosen > 0) | |
565 | l = prom_getprop(_prom->chosen, "bootargs", p, COMMAND_LINE_SIZE-1); | |
566 | #ifdef CONFIG_CMDLINE | |
0e4aa9c2 | 567 | if (l <= 0 || p[0] == '\0') /* dbl check */ |
9b6b563c PM |
568 | strlcpy(RELOC(prom_cmd_line), |
569 | RELOC(CONFIG_CMDLINE), sizeof(prom_cmd_line)); | |
570 | #endif /* CONFIG_CMDLINE */ | |
571 | prom_printf("command line: %s\n", RELOC(prom_cmd_line)); | |
572 | ||
573 | #ifdef CONFIG_PPC64 | |
574 | opt = strstr(RELOC(prom_cmd_line), RELOC("iommu=")); | |
575 | if (opt) { | |
576 | prom_printf("iommu opt is: %s\n", opt); | |
577 | opt += 6; | |
578 | while (*opt && *opt == ' ') | |
579 | opt++; | |
580 | if (!strncmp(opt, RELOC("off"), 3)) | |
165785e5 | 581 | RELOC(prom_iommu_off) = 1; |
9b6b563c | 582 | else if (!strncmp(opt, RELOC("force"), 5)) |
165785e5 | 583 | RELOC(prom_iommu_force_on) = 1; |
9b6b563c PM |
584 | } |
585 | #endif | |
cf68787b BK |
586 | opt = strstr(RELOC(prom_cmd_line), RELOC("mem=")); |
587 | if (opt) { | |
588 | opt += 4; | |
589 | RELOC(prom_memory_limit) = prom_memparse(opt, (const char **)&opt); | |
590 | #ifdef CONFIG_PPC64 | |
591 | /* Align to 16 MB == size of ppc64 large page */ | |
592 | RELOC(prom_memory_limit) = ALIGN(RELOC(prom_memory_limit), 0x1000000); | |
593 | #endif | |
594 | } | |
9b6b563c PM |
595 | } |
596 | ||
597 | #ifdef CONFIG_PPC_PSERIES | |
598 | /* | |
f709bfac PM |
599 | * There are two methods for telling firmware what our capabilities are. |
600 | * Newer machines have an "ibm,client-architecture-support" method on the | |
601 | * root node. For older machines, we have to call the "process-elf-header" | |
602 | * method in the /packages/elf-loader node, passing it a fake 32-bit | |
603 | * ELF header containing a couple of PT_NOTE sections that contain | |
604 | * structures that contain various information. | |
9b6b563c | 605 | */ |
f709bfac PM |
606 | |
607 | /* | |
608 | * New method - extensible architecture description vector. | |
609 | * | |
610 | * Because the description vector contains a mix of byte and word | |
611 | * values, we declare it as an unsigned char array, and use this | |
612 | * macro to put word values in. | |
613 | */ | |
614 | #define W(x) ((x) >> 24) & 0xff, ((x) >> 16) & 0xff, \ | |
615 | ((x) >> 8) & 0xff, (x) & 0xff | |
616 | ||
617 | /* Option vector bits - generic bits in byte 1 */ | |
618 | #define OV_IGNORE 0x80 /* ignore this vector */ | |
619 | #define OV_CESSATION_POLICY 0x40 /* halt if unsupported option present*/ | |
620 | ||
621 | /* Option vector 1: processor architectures supported */ | |
622 | #define OV1_PPC_2_00 0x80 /* set if we support PowerPC 2.00 */ | |
623 | #define OV1_PPC_2_01 0x40 /* set if we support PowerPC 2.01 */ | |
624 | #define OV1_PPC_2_02 0x20 /* set if we support PowerPC 2.02 */ | |
625 | #define OV1_PPC_2_03 0x10 /* set if we support PowerPC 2.03 */ | |
626 | #define OV1_PPC_2_04 0x08 /* set if we support PowerPC 2.04 */ | |
627 | #define OV1_PPC_2_05 0x04 /* set if we support PowerPC 2.05 */ | |
0cb99013 | 628 | #define OV1_PPC_2_06 0x02 /* set if we support PowerPC 2.06 */ |
f709bfac PM |
629 | |
630 | /* Option vector 2: Open Firmware options supported */ | |
631 | #define OV2_REAL_MODE 0x20 /* set if we want OF in real mode */ | |
632 | ||
633 | /* Option vector 3: processor options supported */ | |
634 | #define OV3_FP 0x80 /* floating point */ | |
635 | #define OV3_VMX 0x40 /* VMX/Altivec */ | |
974a76f5 | 636 | #define OV3_DFP 0x20 /* decimal FP */ |
f709bfac PM |
637 | |
638 | /* Option vector 5: PAPR/OF options supported */ | |
639 | #define OV5_LPAR 0x80 /* logical partitioning supported */ | |
640 | #define OV5_SPLPAR 0x40 /* shared-processor LPAR supported */ | |
641 | /* ibm,dynamic-reconfiguration-memory property supported */ | |
642 | #define OV5_DRCONF_MEMORY 0x20 | |
643 | #define OV5_LARGE_PAGES 0x10 /* large pages supported */ | |
d8c391a5 | 644 | #define OV5_DONATE_DEDICATE_CPU 0x02 /* donate dedicated CPU support */ |
014dad90 ME |
645 | /* PCIe/MSI support. Without MSI full PCIe is not supported */ |
646 | #ifdef CONFIG_PCI_MSI | |
647 | #define OV5_MSI 0x01 /* PCIe/MSI support */ | |
648 | #else | |
649 | #define OV5_MSI 0x00 | |
650 | #endif /* CONFIG_PCI_MSI */ | |
8391e42a NF |
651 | #ifdef CONFIG_PPC_SMLPAR |
652 | #define OV5_CMO 0x80 /* Cooperative Memory Overcommitment */ | |
653 | #else | |
654 | #define OV5_CMO 0x00 | |
655 | #endif | |
4b83c330 | 656 | #define OV5_TYPE1_AFFINITY 0x80 /* Type 1 NUMA affinity */ |
f709bfac | 657 | |
28bb9ee1 | 658 | /* Option Vector 6: IBM PAPR hints */ |
659 | #define OV6_LINUX 0x02 /* Linux is our OS */ | |
660 | ||
f709bfac PM |
661 | /* |
662 | * The architecture vector has an array of PVR mask/value pairs, | |
663 | * followed by # option vectors - 1, followed by the option vectors. | |
664 | */ | |
665 | static unsigned char ibm_architecture_vec[] = { | |
666 | W(0xfffe0000), W(0x003a0000), /* POWER5/POWER5+ */ | |
03054d51 | 667 | W(0xffff0000), W(0x003e0000), /* POWER6 */ |
e952e6c4 | 668 | W(0xffff0000), W(0x003f0000), /* POWER7 */ |
0cb99013 | 669 | W(0xffffffff), W(0x0f000003), /* all 2.06-compliant */ |
0efbc18a | 670 | W(0xffffffff), W(0x0f000002), /* all 2.05-compliant */ |
f709bfac | 671 | W(0xfffffffe), W(0x0f000001), /* all 2.04-compliant and earlier */ |
28bb9ee1 | 672 | 6 - 1, /* 6 option vectors */ |
f709bfac PM |
673 | |
674 | /* option vector 1: processor architectures supported */ | |
11e9ed43 | 675 | 3 - 2, /* length */ |
f709bfac PM |
676 | 0, /* don't ignore, don't halt */ |
677 | OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 | | |
0cb99013 | 678 | OV1_PPC_2_04 | OV1_PPC_2_05 | OV1_PPC_2_06, |
f709bfac PM |
679 | |
680 | /* option vector 2: Open Firmware options supported */ | |
11e9ed43 | 681 | 34 - 2, /* length */ |
f709bfac PM |
682 | OV2_REAL_MODE, |
683 | 0, 0, | |
684 | W(0xffffffff), /* real_base */ | |
685 | W(0xffffffff), /* real_size */ | |
686 | W(0xffffffff), /* virt_base */ | |
687 | W(0xffffffff), /* virt_size */ | |
688 | W(0xffffffff), /* load_base */ | |
856cc2f0 | 689 | W(64), /* 64MB min RMA */ |
f709bfac PM |
690 | W(0xffffffff), /* full client load */ |
691 | 0, /* min RMA percentage of total RAM */ | |
692 | 48, /* max log_2(hash table size) */ | |
693 | ||
694 | /* option vector 3: processor options supported */ | |
11e9ed43 | 695 | 3 - 2, /* length */ |
f709bfac | 696 | 0, /* don't ignore, don't halt */ |
974a76f5 | 697 | OV3_FP | OV3_VMX | OV3_DFP, |
f709bfac PM |
698 | |
699 | /* option vector 4: IBM PAPR implementation */ | |
11e9ed43 | 700 | 2 - 2, /* length */ |
f709bfac PM |
701 | 0, /* don't halt */ |
702 | ||
703 | /* option vector 5: PAPR/OF options */ | |
28bb9ee1 | 704 | 13 - 2, /* length */ |
f709bfac | 705 | 0, /* don't ignore, don't halt */ |
d8c391a5 JM |
706 | OV5_LPAR | OV5_SPLPAR | OV5_LARGE_PAGES | OV5_DRCONF_MEMORY | |
707 | OV5_DONATE_DEDICATE_CPU | OV5_MSI, | |
8391e42a NF |
708 | 0, |
709 | OV5_CMO, | |
4b83c330 | 710 | OV5_TYPE1_AFFINITY, |
28bb9ee1 | 711 | 0, |
712 | 0, | |
713 | 0, | |
efec959f BH |
714 | /* WARNING: The offset of the "number of cores" field below |
715 | * must match by the macro below. Update the definition if | |
716 | * the structure layout changes. | |
717 | */ | |
718 | #define IBM_ARCH_VEC_NRCORES_OFFSET 100 | |
719 | W(NR_CPUS), /* number of cores supported */ | |
28bb9ee1 | 720 | |
721 | /* option vector 6: IBM PAPR hints */ | |
722 | 4 - 2, /* length */ | |
723 | 0, | |
724 | 0, | |
725 | OV6_LINUX, | |
726 | ||
f709bfac PM |
727 | }; |
728 | ||
729 | /* Old method - ELF header with PT_NOTE sections */ | |
9b6b563c PM |
730 | static struct fake_elf { |
731 | Elf32_Ehdr elfhdr; | |
732 | Elf32_Phdr phdr[2]; | |
733 | struct chrpnote { | |
734 | u32 namesz; | |
735 | u32 descsz; | |
736 | u32 type; | |
737 | char name[8]; /* "PowerPC" */ | |
738 | struct chrpdesc { | |
739 | u32 real_mode; | |
740 | u32 real_base; | |
741 | u32 real_size; | |
742 | u32 virt_base; | |
743 | u32 virt_size; | |
744 | u32 load_base; | |
745 | } chrpdesc; | |
746 | } chrpnote; | |
747 | struct rpanote { | |
748 | u32 namesz; | |
749 | u32 descsz; | |
750 | u32 type; | |
751 | char name[24]; /* "IBM,RPA-Client-Config" */ | |
752 | struct rpadesc { | |
753 | u32 lpar_affinity; | |
754 | u32 min_rmo_size; | |
755 | u32 min_rmo_percent; | |
756 | u32 max_pft_size; | |
757 | u32 splpar; | |
758 | u32 min_load; | |
759 | u32 new_mem_def; | |
760 | u32 ignore_me; | |
761 | } rpadesc; | |
762 | } rpanote; | |
5663a123 | 763 | } fake_elf = { |
9b6b563c PM |
764 | .elfhdr = { |
765 | .e_ident = { 0x7f, 'E', 'L', 'F', | |
766 | ELFCLASS32, ELFDATA2MSB, EV_CURRENT }, | |
767 | .e_type = ET_EXEC, /* yeah right */ | |
768 | .e_machine = EM_PPC, | |
769 | .e_version = EV_CURRENT, | |
770 | .e_phoff = offsetof(struct fake_elf, phdr), | |
771 | .e_phentsize = sizeof(Elf32_Phdr), | |
772 | .e_phnum = 2 | |
773 | }, | |
774 | .phdr = { | |
775 | [0] = { | |
776 | .p_type = PT_NOTE, | |
777 | .p_offset = offsetof(struct fake_elf, chrpnote), | |
778 | .p_filesz = sizeof(struct chrpnote) | |
779 | }, [1] = { | |
780 | .p_type = PT_NOTE, | |
781 | .p_offset = offsetof(struct fake_elf, rpanote), | |
782 | .p_filesz = sizeof(struct rpanote) | |
783 | } | |
784 | }, | |
785 | .chrpnote = { | |
786 | .namesz = sizeof("PowerPC"), | |
787 | .descsz = sizeof(struct chrpdesc), | |
788 | .type = 0x1275, | |
789 | .name = "PowerPC", | |
790 | .chrpdesc = { | |
791 | .real_mode = ~0U, /* ~0 means "don't care" */ | |
792 | .real_base = ~0U, | |
793 | .real_size = ~0U, | |
794 | .virt_base = ~0U, | |
795 | .virt_size = ~0U, | |
796 | .load_base = ~0U | |
797 | }, | |
798 | }, | |
799 | .rpanote = { | |
800 | .namesz = sizeof("IBM,RPA-Client-Config"), | |
801 | .descsz = sizeof(struct rpadesc), | |
802 | .type = 0x12759999, | |
803 | .name = "IBM,RPA-Client-Config", | |
804 | .rpadesc = { | |
5663a123 PM |
805 | .lpar_affinity = 0, |
806 | .min_rmo_size = 64, /* in megabytes */ | |
9b6b563c | 807 | .min_rmo_percent = 0, |
5663a123 | 808 | .max_pft_size = 48, /* 2^48 bytes max PFT size */ |
9b6b563c PM |
809 | .splpar = 1, |
810 | .min_load = ~0U, | |
5663a123 | 811 | .new_mem_def = 0 |
9b6b563c PM |
812 | } |
813 | } | |
814 | }; | |
815 | ||
efec959f BH |
816 | static int __init prom_count_smt_threads(void) |
817 | { | |
818 | phandle node; | |
819 | char type[64]; | |
820 | unsigned int plen; | |
821 | ||
822 | /* Pick up th first CPU node we can find */ | |
823 | for (node = 0; prom_next_node(&node); ) { | |
824 | type[0] = 0; | |
825 | prom_getprop(node, "device_type", type, sizeof(type)); | |
826 | ||
827 | if (strcmp(type, RELOC("cpu"))) | |
828 | continue; | |
829 | /* | |
830 | * There is an entry for each smt thread, each entry being | |
831 | * 4 bytes long. All cpus should have the same number of | |
832 | * smt threads, so return after finding the first. | |
833 | */ | |
834 | plen = prom_getproplen(node, "ibm,ppc-interrupt-server#s"); | |
835 | if (plen == PROM_ERROR) | |
836 | break; | |
837 | plen >>= 2; | |
838 | prom_debug("Found 0x%x smt threads per core\n", (unsigned long)plen); | |
839 | ||
840 | /* Sanity check */ | |
841 | if (plen < 1 || plen > 64) { | |
842 | prom_printf("Threads per core 0x%x out of bounds, assuming 1\n", | |
843 | (unsigned long)plen); | |
844 | return 1; | |
845 | } | |
846 | return plen; | |
847 | } | |
848 | prom_debug("No threads found, assuming 1 per core\n"); | |
849 | ||
850 | return 1; | |
851 | ||
852 | } | |
853 | ||
854 | ||
9b6b563c PM |
855 | static void __init prom_send_capabilities(void) |
856 | { | |
f709bfac PM |
857 | ihandle elfloader, root; |
858 | prom_arg_t ret; | |
efec959f | 859 | u32 *cores; |
f709bfac PM |
860 | |
861 | root = call_prom("open", 1, 1, ADDR("/")); | |
862 | if (root != 0) { | |
efec959f BH |
863 | /* We need to tell the FW about the number of cores we support. |
864 | * | |
865 | * To do that, we count the number of threads on the first core | |
866 | * (we assume this is the same for all cores) and use it to | |
867 | * divide NR_CPUS. | |
868 | */ | |
869 | cores = (u32 *)PTRRELOC(&ibm_architecture_vec[IBM_ARCH_VEC_NRCORES_OFFSET]); | |
870 | if (*cores != NR_CPUS) { | |
871 | prom_printf("WARNING ! " | |
872 | "ibm_architecture_vec structure inconsistent: 0x%x !\n", | |
873 | *cores); | |
874 | } else { | |
33ad5e4b | 875 | *cores = DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads()); |
efec959f BH |
876 | prom_printf("Max number of cores passed to firmware: 0x%x\n", |
877 | (unsigned long)*cores); | |
878 | } | |
879 | ||
f709bfac | 880 | /* try calling the ibm,client-architecture-support method */ |
049d0497 | 881 | prom_printf("Calling ibm,client-architecture-support..."); |
f709bfac PM |
882 | if (call_prom_ret("call-method", 3, 2, &ret, |
883 | ADDR("ibm,client-architecture-support"), | |
33b74977 | 884 | root, |
f709bfac PM |
885 | ADDR(ibm_architecture_vec)) == 0) { |
886 | /* the call exists... */ | |
887 | if (ret) | |
4da727ae | 888 | prom_printf("\nWARNING: ibm,client-architecture" |
f709bfac PM |
889 | "-support call FAILED!\n"); |
890 | call_prom("close", 1, 0, root); | |
4da727ae | 891 | prom_printf(" done\n"); |
f709bfac PM |
892 | return; |
893 | } | |
894 | call_prom("close", 1, 0, root); | |
049d0497 | 895 | prom_printf(" not implemented\n"); |
f709bfac | 896 | } |
9b6b563c | 897 | |
f709bfac | 898 | /* no ibm,client-architecture-support call, try the old way */ |
9b6b563c PM |
899 | elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader")); |
900 | if (elfloader == 0) { | |
901 | prom_printf("couldn't open /packages/elf-loader\n"); | |
902 | return; | |
903 | } | |
904 | call_prom("call-method", 3, 1, ADDR("process-elf-header"), | |
905 | elfloader, ADDR(&fake_elf)); | |
906 | call_prom("close", 1, 0, elfloader); | |
907 | } | |
908 | #endif | |
909 | ||
910 | /* | |
911 | * Memory allocation strategy... our layout is normally: | |
912 | * | |
913 | * at 14Mb or more we have vmlinux, then a gap and initrd. In some | |
914 | * rare cases, initrd might end up being before the kernel though. | |
915 | * We assume this won't override the final kernel at 0, we have no | |
916 | * provision to handle that in this version, but it should hopefully | |
917 | * never happen. | |
918 | * | |
919 | * alloc_top is set to the top of RMO, eventually shrink down if the | |
920 | * TCEs overlap | |
921 | * | |
922 | * alloc_bottom is set to the top of kernel/initrd | |
923 | * | |
924 | * from there, allocations are done this way : rtas is allocated | |
925 | * topmost, and the device-tree is allocated from the bottom. We try | |
926 | * to grow the device-tree allocation as we progress. If we can't, | |
927 | * then we fail, we don't currently have a facility to restart | |
928 | * elsewhere, but that shouldn't be necessary. | |
929 | * | |
930 | * Note that calls to reserve_mem have to be done explicitly, memory | |
931 | * allocated with either alloc_up or alloc_down isn't automatically | |
932 | * reserved. | |
933 | */ | |
934 | ||
935 | ||
936 | /* | |
937 | * Allocates memory in the RMO upward from the kernel/initrd | |
938 | * | |
939 | * When align is 0, this is a special case, it means to allocate in place | |
940 | * at the current location of alloc_bottom or fail (that is basically | |
941 | * extending the previous allocation). Used for the device-tree flattening | |
942 | */ | |
943 | static unsigned long __init alloc_up(unsigned long size, unsigned long align) | |
944 | { | |
c4988820 | 945 | unsigned long base = RELOC(alloc_bottom); |
9b6b563c PM |
946 | unsigned long addr = 0; |
947 | ||
c4988820 PM |
948 | if (align) |
949 | base = _ALIGN_UP(base, align); | |
9b6b563c PM |
950 | prom_debug("alloc_up(%x, %x)\n", size, align); |
951 | if (RELOC(ram_top) == 0) | |
952 | prom_panic("alloc_up() called with mem not initialized\n"); | |
953 | ||
954 | if (align) | |
955 | base = _ALIGN_UP(RELOC(alloc_bottom), align); | |
956 | else | |
957 | base = RELOC(alloc_bottom); | |
958 | ||
959 | for(; (base + size) <= RELOC(alloc_top); | |
960 | base = _ALIGN_UP(base + 0x100000, align)) { | |
961 | prom_debug(" trying: 0x%x\n\r", base); | |
962 | addr = (unsigned long)prom_claim(base, size, 0); | |
c4988820 | 963 | if (addr != PROM_ERROR && addr != 0) |
9b6b563c PM |
964 | break; |
965 | addr = 0; | |
966 | if (align == 0) | |
967 | break; | |
968 | } | |
969 | if (addr == 0) | |
970 | return 0; | |
971 | RELOC(alloc_bottom) = addr; | |
972 | ||
973 | prom_debug(" -> %x\n", addr); | |
974 | prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom)); | |
975 | prom_debug(" alloc_top : %x\n", RELOC(alloc_top)); | |
976 | prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); | |
977 | prom_debug(" rmo_top : %x\n", RELOC(rmo_top)); | |
978 | prom_debug(" ram_top : %x\n", RELOC(ram_top)); | |
979 | ||
980 | return addr; | |
981 | } | |
982 | ||
983 | /* | |
984 | * Allocates memory downward, either from top of RMO, or if highmem | |
985 | * is set, from the top of RAM. Note that this one doesn't handle | |
986 | * failures. It does claim memory if highmem is not set. | |
987 | */ | |
988 | static unsigned long __init alloc_down(unsigned long size, unsigned long align, | |
989 | int highmem) | |
990 | { | |
991 | unsigned long base, addr = 0; | |
992 | ||
993 | prom_debug("alloc_down(%x, %x, %s)\n", size, align, | |
994 | highmem ? RELOC("(high)") : RELOC("(low)")); | |
995 | if (RELOC(ram_top) == 0) | |
996 | prom_panic("alloc_down() called with mem not initialized\n"); | |
997 | ||
998 | if (highmem) { | |
999 | /* Carve out storage for the TCE table. */ | |
1000 | addr = _ALIGN_DOWN(RELOC(alloc_top_high) - size, align); | |
1001 | if (addr <= RELOC(alloc_bottom)) | |
1002 | return 0; | |
1003 | /* Will we bump into the RMO ? If yes, check out that we | |
1004 | * didn't overlap existing allocations there, if we did, | |
1005 | * we are dead, we must be the first in town ! | |
1006 | */ | |
1007 | if (addr < RELOC(rmo_top)) { | |
1008 | /* Good, we are first */ | |
1009 | if (RELOC(alloc_top) == RELOC(rmo_top)) | |
1010 | RELOC(alloc_top) = RELOC(rmo_top) = addr; | |
1011 | else | |
1012 | return 0; | |
1013 | } | |
1014 | RELOC(alloc_top_high) = addr; | |
1015 | goto bail; | |
1016 | } | |
1017 | ||
1018 | base = _ALIGN_DOWN(RELOC(alloc_top) - size, align); | |
1019 | for (; base > RELOC(alloc_bottom); | |
1020 | base = _ALIGN_DOWN(base - 0x100000, align)) { | |
1021 | prom_debug(" trying: 0x%x\n\r", base); | |
1022 | addr = (unsigned long)prom_claim(base, size, 0); | |
c4988820 | 1023 | if (addr != PROM_ERROR && addr != 0) |
9b6b563c PM |
1024 | break; |
1025 | addr = 0; | |
1026 | } | |
1027 | if (addr == 0) | |
1028 | return 0; | |
1029 | RELOC(alloc_top) = addr; | |
1030 | ||
1031 | bail: | |
1032 | prom_debug(" -> %x\n", addr); | |
1033 | prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom)); | |
1034 | prom_debug(" alloc_top : %x\n", RELOC(alloc_top)); | |
1035 | prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); | |
1036 | prom_debug(" rmo_top : %x\n", RELOC(rmo_top)); | |
1037 | prom_debug(" ram_top : %x\n", RELOC(ram_top)); | |
1038 | ||
1039 | return addr; | |
1040 | } | |
1041 | ||
1042 | /* | |
1043 | * Parse a "reg" cell | |
1044 | */ | |
1045 | static unsigned long __init prom_next_cell(int s, cell_t **cellp) | |
1046 | { | |
1047 | cell_t *p = *cellp; | |
1048 | unsigned long r = 0; | |
1049 | ||
1050 | /* Ignore more than 2 cells */ | |
1051 | while (s > sizeof(unsigned long) / 4) { | |
1052 | p++; | |
1053 | s--; | |
1054 | } | |
1055 | r = *p++; | |
1056 | #ifdef CONFIG_PPC64 | |
35499c01 | 1057 | if (s > 1) { |
9b6b563c PM |
1058 | r <<= 32; |
1059 | r |= *(p++); | |
1060 | } | |
1061 | #endif | |
1062 | *cellp = p; | |
1063 | return r; | |
1064 | } | |
1065 | ||
1066 | /* | |
1067 | * Very dumb function for adding to the memory reserve list, but | |
1068 | * we don't need anything smarter at this point | |
1069 | * | |
1070 | * XXX Eventually check for collisions. They should NEVER happen. | |
1071 | * If problems seem to show up, it would be a good start to track | |
1072 | * them down. | |
1073 | */ | |
0108d3fe | 1074 | static void __init reserve_mem(u64 base, u64 size) |
9b6b563c | 1075 | { |
cbbcf340 | 1076 | u64 top = base + size; |
9b6b563c PM |
1077 | unsigned long cnt = RELOC(mem_reserve_cnt); |
1078 | ||
1079 | if (size == 0) | |
1080 | return; | |
1081 | ||
1082 | /* We need to always keep one empty entry so that we | |
1083 | * have our terminator with "size" set to 0 since we are | |
1084 | * dumb and just copy this entire array to the boot params | |
1085 | */ | |
1086 | base = _ALIGN_DOWN(base, PAGE_SIZE); | |
1087 | top = _ALIGN_UP(top, PAGE_SIZE); | |
1088 | size = top - base; | |
1089 | ||
1090 | if (cnt >= (MEM_RESERVE_MAP_SIZE - 1)) | |
1091 | prom_panic("Memory reserve map exhausted !\n"); | |
1092 | RELOC(mem_reserve_map)[cnt].base = base; | |
1093 | RELOC(mem_reserve_map)[cnt].size = size; | |
1094 | RELOC(mem_reserve_cnt) = cnt + 1; | |
1095 | } | |
1096 | ||
1097 | /* | |
b3c2ffd5 | 1098 | * Initialize memory allocation mechanism, parse "memory" nodes and |
9b6b563c PM |
1099 | * obtain that way the top of memory and RMO to setup out local allocator |
1100 | */ | |
1101 | static void __init prom_init_mem(void) | |
1102 | { | |
1103 | phandle node; | |
1104 | char *path, type[64]; | |
1105 | unsigned int plen; | |
1106 | cell_t *p, *endp; | |
1107 | struct prom_t *_prom = &RELOC(prom); | |
1108 | u32 rac, rsc; | |
1109 | ||
1110 | /* | |
1111 | * We iterate the memory nodes to find | |
1112 | * 1) top of RMO (first node) | |
1113 | * 2) top of memory | |
1114 | */ | |
1115 | rac = 2; | |
1116 | prom_getprop(_prom->root, "#address-cells", &rac, sizeof(rac)); | |
1117 | rsc = 1; | |
1118 | prom_getprop(_prom->root, "#size-cells", &rsc, sizeof(rsc)); | |
1119 | prom_debug("root_addr_cells: %x\n", (unsigned long) rac); | |
1120 | prom_debug("root_size_cells: %x\n", (unsigned long) rsc); | |
1121 | ||
1122 | prom_debug("scanning memory:\n"); | |
1123 | path = RELOC(prom_scratch); | |
1124 | ||
1125 | for (node = 0; prom_next_node(&node); ) { | |
1126 | type[0] = 0; | |
1127 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1128 | ||
c4988820 PM |
1129 | if (type[0] == 0) { |
1130 | /* | |
1131 | * CHRP Longtrail machines have no device_type | |
1132 | * on the memory node, so check the name instead... | |
1133 | */ | |
1134 | prom_getprop(node, "name", type, sizeof(type)); | |
1135 | } | |
9b6b563c PM |
1136 | if (strcmp(type, RELOC("memory"))) |
1137 | continue; | |
c4988820 | 1138 | |
9b6b563c PM |
1139 | plen = prom_getprop(node, "reg", RELOC(regbuf), sizeof(regbuf)); |
1140 | if (plen > sizeof(regbuf)) { | |
1141 | prom_printf("memory node too large for buffer !\n"); | |
1142 | plen = sizeof(regbuf); | |
1143 | } | |
1144 | p = RELOC(regbuf); | |
1145 | endp = p + (plen / sizeof(cell_t)); | |
1146 | ||
1147 | #ifdef DEBUG_PROM | |
1148 | memset(path, 0, PROM_SCRATCH_SIZE); | |
1149 | call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); | |
1150 | prom_debug(" node %s :\n", path); | |
1151 | #endif /* DEBUG_PROM */ | |
1152 | ||
1153 | while ((endp - p) >= (rac + rsc)) { | |
1154 | unsigned long base, size; | |
1155 | ||
1156 | base = prom_next_cell(rac, &p); | |
1157 | size = prom_next_cell(rsc, &p); | |
1158 | ||
1159 | if (size == 0) | |
1160 | continue; | |
1161 | prom_debug(" %x %x\n", base, size); | |
ab1b55e2 | 1162 | if (base == 0 && (RELOC(of_platform) & PLATFORM_LPAR)) |
9b6b563c PM |
1163 | RELOC(rmo_top) = size; |
1164 | if ((base + size) > RELOC(ram_top)) | |
1165 | RELOC(ram_top) = base + size; | |
1166 | } | |
1167 | } | |
1168 | ||
1169 | RELOC(alloc_bottom) = PAGE_ALIGN((unsigned long)&RELOC(_end) + 0x4000); | |
1170 | ||
1171 | /* Check if we have an initrd after the kernel, if we do move our bottom | |
1172 | * point to after it | |
1173 | */ | |
1174 | if (RELOC(prom_initrd_start)) { | |
1175 | if (RELOC(prom_initrd_end) > RELOC(alloc_bottom)) | |
1176 | RELOC(alloc_bottom) = PAGE_ALIGN(RELOC(prom_initrd_end)); | |
1177 | } | |
1178 | ||
cf68787b BK |
1179 | /* |
1180 | * If prom_memory_limit is set we reduce the upper limits *except* for | |
1181 | * alloc_top_high. This must be the real top of RAM so we can put | |
1182 | * TCE's up there. | |
1183 | */ | |
1184 | ||
1185 | RELOC(alloc_top_high) = RELOC(ram_top); | |
1186 | ||
1187 | if (RELOC(prom_memory_limit)) { | |
1188 | if (RELOC(prom_memory_limit) <= RELOC(alloc_bottom)) { | |
1189 | prom_printf("Ignoring mem=%x <= alloc_bottom.\n", | |
1190 | RELOC(prom_memory_limit)); | |
1191 | RELOC(prom_memory_limit) = 0; | |
1192 | } else if (RELOC(prom_memory_limit) >= RELOC(ram_top)) { | |
1193 | prom_printf("Ignoring mem=%x >= ram_top.\n", | |
1194 | RELOC(prom_memory_limit)); | |
1195 | RELOC(prom_memory_limit) = 0; | |
1196 | } else { | |
1197 | RELOC(ram_top) = RELOC(prom_memory_limit); | |
1198 | RELOC(rmo_top) = min(RELOC(rmo_top), RELOC(prom_memory_limit)); | |
1199 | } | |
1200 | } | |
1201 | ||
9b6b563c PM |
1202 | /* |
1203 | * Setup our top alloc point, that is top of RMO or top of | |
1204 | * segment 0 when running non-LPAR. | |
1205 | * Some RS64 machines have buggy firmware where claims up at | |
1206 | * 1GB fail. Cap at 768MB as a workaround. | |
1207 | * Since 768MB is plenty of room, and we need to cap to something | |
1208 | * reasonable on 32-bit, cap at 768MB on all machines. | |
1209 | */ | |
1210 | if (!RELOC(rmo_top)) | |
1211 | RELOC(rmo_top) = RELOC(ram_top); | |
1212 | RELOC(rmo_top) = min(0x30000000ul, RELOC(rmo_top)); | |
1213 | RELOC(alloc_top) = RELOC(rmo_top); | |
2babf5c2 | 1214 | RELOC(alloc_top_high) = RELOC(ram_top); |
9b6b563c PM |
1215 | |
1216 | prom_printf("memory layout at init:\n"); | |
cf68787b | 1217 | prom_printf(" memory_limit : %x (16 MB aligned)\n", RELOC(prom_memory_limit)); |
9b6b563c PM |
1218 | prom_printf(" alloc_bottom : %x\n", RELOC(alloc_bottom)); |
1219 | prom_printf(" alloc_top : %x\n", RELOC(alloc_top)); | |
1220 | prom_printf(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); | |
1221 | prom_printf(" rmo_top : %x\n", RELOC(rmo_top)); | |
1222 | prom_printf(" ram_top : %x\n", RELOC(ram_top)); | |
1223 | } | |
1224 | ||
1225 | ||
1226 | /* | |
1227 | * Allocate room for and instantiate RTAS | |
1228 | */ | |
1229 | static void __init prom_instantiate_rtas(void) | |
1230 | { | |
1231 | phandle rtas_node; | |
1232 | ihandle rtas_inst; | |
1233 | u32 base, entry = 0; | |
1234 | u32 size = 0; | |
1235 | ||
1236 | prom_debug("prom_instantiate_rtas: start...\n"); | |
1237 | ||
1238 | rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas")); | |
1239 | prom_debug("rtas_node: %x\n", rtas_node); | |
1240 | if (!PHANDLE_VALID(rtas_node)) | |
1241 | return; | |
1242 | ||
1243 | prom_getprop(rtas_node, "rtas-size", &size, sizeof(size)); | |
1244 | if (size == 0) | |
1245 | return; | |
1246 | ||
1247 | base = alloc_down(size, PAGE_SIZE, 0); | |
1248 | if (base == 0) { | |
1249 | prom_printf("RTAS allocation failed !\n"); | |
1250 | return; | |
1251 | } | |
1252 | ||
1253 | rtas_inst = call_prom("open", 1, 1, ADDR("/rtas")); | |
1254 | if (!IHANDLE_VALID(rtas_inst)) { | |
a23414be | 1255 | prom_printf("opening rtas package failed (%x)\n", rtas_inst); |
9b6b563c PM |
1256 | return; |
1257 | } | |
1258 | ||
1f8737aa | 1259 | prom_printf("instantiating rtas at 0x%x...", base); |
9b6b563c PM |
1260 | |
1261 | if (call_prom_ret("call-method", 3, 2, &entry, | |
1262 | ADDR("instantiate-rtas"), | |
a23414be | 1263 | rtas_inst, base) != 0 |
9b6b563c PM |
1264 | || entry == 0) { |
1265 | prom_printf(" failed\n"); | |
1266 | return; | |
1267 | } | |
1268 | prom_printf(" done\n"); | |
1269 | ||
1270 | reserve_mem(base, size); | |
1271 | ||
a23414be PM |
1272 | prom_setprop(rtas_node, "/rtas", "linux,rtas-base", |
1273 | &base, sizeof(base)); | |
1274 | prom_setprop(rtas_node, "/rtas", "linux,rtas-entry", | |
1275 | &entry, sizeof(entry)); | |
9b6b563c PM |
1276 | |
1277 | prom_debug("rtas base = 0x%x\n", base); | |
1278 | prom_debug("rtas entry = 0x%x\n", entry); | |
1279 | prom_debug("rtas size = 0x%x\n", (long)size); | |
1280 | ||
1281 | prom_debug("prom_instantiate_rtas: end...\n"); | |
1282 | } | |
1283 | ||
1284 | #ifdef CONFIG_PPC64 | |
1285 | /* | |
1286 | * Allocate room for and initialize TCE tables | |
1287 | */ | |
1288 | static void __init prom_initialize_tce_table(void) | |
1289 | { | |
1290 | phandle node; | |
1291 | ihandle phb_node; | |
1292 | char compatible[64], type[64], model[64]; | |
1293 | char *path = RELOC(prom_scratch); | |
1294 | u64 base, align; | |
1295 | u32 minalign, minsize; | |
1296 | u64 tce_entry, *tce_entryp; | |
1297 | u64 local_alloc_top, local_alloc_bottom; | |
1298 | u64 i; | |
1299 | ||
165785e5 | 1300 | if (RELOC(prom_iommu_off)) |
9b6b563c PM |
1301 | return; |
1302 | ||
1303 | prom_debug("starting prom_initialize_tce_table\n"); | |
1304 | ||
1305 | /* Cache current top of allocs so we reserve a single block */ | |
1306 | local_alloc_top = RELOC(alloc_top_high); | |
1307 | local_alloc_bottom = local_alloc_top; | |
1308 | ||
1309 | /* Search all nodes looking for PHBs. */ | |
1310 | for (node = 0; prom_next_node(&node); ) { | |
1311 | compatible[0] = 0; | |
1312 | type[0] = 0; | |
1313 | model[0] = 0; | |
1314 | prom_getprop(node, "compatible", | |
1315 | compatible, sizeof(compatible)); | |
1316 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1317 | prom_getprop(node, "model", model, sizeof(model)); | |
1318 | ||
1319 | if ((type[0] == 0) || (strstr(type, RELOC("pci")) == NULL)) | |
1320 | continue; | |
1321 | ||
e788ff13 | 1322 | /* Keep the old logic intact to avoid regression. */ |
9b6b563c PM |
1323 | if (compatible[0] != 0) { |
1324 | if ((strstr(compatible, RELOC("python")) == NULL) && | |
1325 | (strstr(compatible, RELOC("Speedwagon")) == NULL) && | |
1326 | (strstr(compatible, RELOC("Winnipeg")) == NULL)) | |
1327 | continue; | |
1328 | } else if (model[0] != 0) { | |
1329 | if ((strstr(model, RELOC("ython")) == NULL) && | |
1330 | (strstr(model, RELOC("peedwagon")) == NULL) && | |
1331 | (strstr(model, RELOC("innipeg")) == NULL)) | |
1332 | continue; | |
1333 | } | |
1334 | ||
1335 | if (prom_getprop(node, "tce-table-minalign", &minalign, | |
1336 | sizeof(minalign)) == PROM_ERROR) | |
1337 | minalign = 0; | |
1338 | if (prom_getprop(node, "tce-table-minsize", &minsize, | |
1339 | sizeof(minsize)) == PROM_ERROR) | |
1340 | minsize = 4UL << 20; | |
1341 | ||
1342 | /* | |
1343 | * Even though we read what OF wants, we just set the table | |
1344 | * size to 4 MB. This is enough to map 2GB of PCI DMA space. | |
1345 | * By doing this, we avoid the pitfalls of trying to DMA to | |
1346 | * MMIO space and the DMA alias hole. | |
1347 | * | |
1348 | * On POWER4, firmware sets the TCE region by assuming | |
1349 | * each TCE table is 8MB. Using this memory for anything | |
1350 | * else will impact performance, so we always allocate 8MB. | |
1351 | * Anton | |
1352 | */ | |
1353 | if (__is_processor(PV_POWER4) || __is_processor(PV_POWER4p)) | |
1354 | minsize = 8UL << 20; | |
1355 | else | |
1356 | minsize = 4UL << 20; | |
1357 | ||
1358 | /* Align to the greater of the align or size */ | |
1359 | align = max(minalign, minsize); | |
1360 | base = alloc_down(minsize, align, 1); | |
1361 | if (base == 0) | |
1362 | prom_panic("ERROR, cannot find space for TCE table.\n"); | |
1363 | if (base < local_alloc_bottom) | |
1364 | local_alloc_bottom = base; | |
1365 | ||
9b6b563c | 1366 | /* It seems OF doesn't null-terminate the path :-( */ |
aca71ef8 | 1367 | memset(path, 0, PROM_SCRATCH_SIZE); |
9b6b563c PM |
1368 | /* Call OF to setup the TCE hardware */ |
1369 | if (call_prom("package-to-path", 3, 1, node, | |
1370 | path, PROM_SCRATCH_SIZE-1) == PROM_ERROR) { | |
1371 | prom_printf("package-to-path failed\n"); | |
1372 | } | |
1373 | ||
a23414be PM |
1374 | /* Save away the TCE table attributes for later use. */ |
1375 | prom_setprop(node, path, "linux,tce-base", &base, sizeof(base)); | |
1376 | prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize)); | |
1377 | ||
9b6b563c PM |
1378 | prom_debug("TCE table: %s\n", path); |
1379 | prom_debug("\tnode = 0x%x\n", node); | |
1380 | prom_debug("\tbase = 0x%x\n", base); | |
1381 | prom_debug("\tsize = 0x%x\n", minsize); | |
1382 | ||
1383 | /* Initialize the table to have a one-to-one mapping | |
1384 | * over the allocated size. | |
1385 | */ | |
2b931fb6 | 1386 | tce_entryp = (u64 *)base; |
9b6b563c PM |
1387 | for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) { |
1388 | tce_entry = (i << PAGE_SHIFT); | |
1389 | tce_entry |= 0x3; | |
1390 | *tce_entryp = tce_entry; | |
1391 | } | |
1392 | ||
1393 | prom_printf("opening PHB %s", path); | |
1394 | phb_node = call_prom("open", 1, 1, path); | |
1395 | if (phb_node == 0) | |
1396 | prom_printf("... failed\n"); | |
1397 | else | |
1398 | prom_printf("... done\n"); | |
1399 | ||
1400 | call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"), | |
1401 | phb_node, -1, minsize, | |
1402 | (u32) base, (u32) (base >> 32)); | |
1403 | call_prom("close", 1, 0, phb_node); | |
1404 | } | |
1405 | ||
1406 | reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom); | |
1407 | ||
2babf5c2 ME |
1408 | /* These are only really needed if there is a memory limit in |
1409 | * effect, but we don't know so export them always. */ | |
1410 | RELOC(prom_tce_alloc_start) = local_alloc_bottom; | |
1411 | RELOC(prom_tce_alloc_end) = local_alloc_top; | |
9b6b563c PM |
1412 | |
1413 | /* Flag the first invalid entry */ | |
1414 | prom_debug("ending prom_initialize_tce_table\n"); | |
1415 | } | |
1416 | #endif | |
1417 | ||
1418 | /* | |
1419 | * With CHRP SMP we need to use the OF to start the other processors. | |
1420 | * We can't wait until smp_boot_cpus (the OF is trashed by then) | |
1421 | * so we have to put the processors into a holding pattern controlled | |
1422 | * by the kernel (not OF) before we destroy the OF. | |
1423 | * | |
1424 | * This uses a chunk of low memory, puts some holding pattern | |
1425 | * code there and sends the other processors off to there until | |
1426 | * smp_boot_cpus tells them to do something. The holding pattern | |
1427 | * checks that address until its cpu # is there, when it is that | |
1428 | * cpu jumps to __secondary_start(). smp_boot_cpus() takes care | |
1429 | * of setting those values. | |
1430 | * | |
1431 | * We also use physical address 0x4 here to tell when a cpu | |
1432 | * is in its holding pattern code. | |
1433 | * | |
1434 | * -- Cort | |
1435 | */ | |
bbd0abda PM |
1436 | /* |
1437 | * We want to reference the copy of __secondary_hold_* in the | |
1438 | * 0 - 0x100 address range | |
1439 | */ | |
1440 | #define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff) | |
1441 | ||
9b6b563c PM |
1442 | static void __init prom_hold_cpus(void) |
1443 | { | |
9b6b563c PM |
1444 | unsigned long i; |
1445 | unsigned int reg; | |
1446 | phandle node; | |
1447 | char type[64]; | |
bbd0abda | 1448 | struct prom_t *_prom = &RELOC(prom); |
9b6b563c | 1449 | unsigned long *spinloop |
bbd0abda | 1450 | = (void *) LOW_ADDR(__secondary_hold_spinloop); |
9b6b563c | 1451 | unsigned long *acknowledge |
bbd0abda | 1452 | = (void *) LOW_ADDR(__secondary_hold_acknowledge); |
bbd0abda | 1453 | unsigned long secondary_hold = LOW_ADDR(__secondary_hold); |
9b6b563c PM |
1454 | |
1455 | prom_debug("prom_hold_cpus: start...\n"); | |
1456 | prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop); | |
1457 | prom_debug(" 1) *spinloop = 0x%x\n", *spinloop); | |
1458 | prom_debug(" 1) acknowledge = 0x%x\n", | |
1459 | (unsigned long)acknowledge); | |
1460 | prom_debug(" 1) *acknowledge = 0x%x\n", *acknowledge); | |
1461 | prom_debug(" 1) secondary_hold = 0x%x\n", secondary_hold); | |
1462 | ||
1463 | /* Set the common spinloop variable, so all of the secondary cpus | |
1464 | * will block when they are awakened from their OF spinloop. | |
1465 | * This must occur for both SMP and non SMP kernels, since OF will | |
1466 | * be trashed when we move the kernel. | |
1467 | */ | |
1468 | *spinloop = 0; | |
1469 | ||
9b6b563c PM |
1470 | /* look for cpus */ |
1471 | for (node = 0; prom_next_node(&node); ) { | |
1472 | type[0] = 0; | |
1473 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1474 | if (strcmp(type, RELOC("cpu")) != 0) | |
1475 | continue; | |
1476 | ||
1477 | /* Skip non-configured cpus. */ | |
1478 | if (prom_getprop(node, "status", type, sizeof(type)) > 0) | |
1479 | if (strcmp(type, RELOC("okay")) != 0) | |
1480 | continue; | |
1481 | ||
1482 | reg = -1; | |
1483 | prom_getprop(node, "reg", ®, sizeof(reg)); | |
1484 | ||
9b6b563c PM |
1485 | prom_debug("cpu hw idx = 0x%x\n", reg); |
1486 | ||
1487 | /* Init the acknowledge var which will be reset by | |
1488 | * the secondary cpu when it awakens from its OF | |
1489 | * spinloop. | |
1490 | */ | |
1491 | *acknowledge = (unsigned long)-1; | |
1492 | ||
7d2f6075 | 1493 | if (reg != _prom->cpu) { |
9b6b563c | 1494 | /* Primary Thread of non-boot cpu */ |
7d2f6075 | 1495 | prom_printf("starting cpu hw idx %x... ", reg); |
9b6b563c PM |
1496 | call_prom("start-cpu", 3, 0, node, |
1497 | secondary_hold, reg); | |
1498 | ||
bbd0abda PM |
1499 | for (i = 0; (i < 100000000) && |
1500 | (*acknowledge == ((unsigned long)-1)); i++ ) | |
9b6b563c PM |
1501 | mb(); |
1502 | ||
bbd0abda | 1503 | if (*acknowledge == reg) |
9b6b563c | 1504 | prom_printf("done\n"); |
bbd0abda | 1505 | else |
9b6b563c | 1506 | prom_printf("failed: %x\n", *acknowledge); |
9b6b563c PM |
1507 | } |
1508 | #ifdef CONFIG_SMP | |
1509 | else | |
7d2f6075 | 1510 | prom_printf("boot cpu hw idx %x\n", reg); |
9b6b563c | 1511 | #endif /* CONFIG_SMP */ |
9b6b563c | 1512 | } |
9b6b563c | 1513 | |
9b6b563c | 1514 | prom_debug("prom_hold_cpus: end...\n"); |
9b6b563c PM |
1515 | } |
1516 | ||
1517 | ||
1518 | static void __init prom_init_client_services(unsigned long pp) | |
1519 | { | |
1520 | struct prom_t *_prom = &RELOC(prom); | |
1521 | ||
1522 | /* Get a handle to the prom entry point before anything else */ | |
1523 | RELOC(prom_entry) = pp; | |
1524 | ||
1525 | /* get a handle for the stdout device */ | |
1526 | _prom->chosen = call_prom("finddevice", 1, 1, ADDR("/chosen")); | |
1527 | if (!PHANDLE_VALID(_prom->chosen)) | |
1528 | prom_panic("cannot find chosen"); /* msg won't be printed :( */ | |
1529 | ||
1530 | /* get device tree root */ | |
1531 | _prom->root = call_prom("finddevice", 1, 1, ADDR("/")); | |
1532 | if (!PHANDLE_VALID(_prom->root)) | |
1533 | prom_panic("cannot find device tree root"); /* msg won't be printed :( */ | |
a575b807 PM |
1534 | |
1535 | _prom->mmumap = 0; | |
1536 | } | |
1537 | ||
1538 | #ifdef CONFIG_PPC32 | |
1539 | /* | |
1540 | * For really old powermacs, we need to map things we claim. | |
1541 | * For that, we need the ihandle of the mmu. | |
a23414be | 1542 | * Also, on the longtrail, we need to work around other bugs. |
a575b807 PM |
1543 | */ |
1544 | static void __init prom_find_mmu(void) | |
1545 | { | |
1546 | struct prom_t *_prom = &RELOC(prom); | |
1547 | phandle oprom; | |
1548 | char version[64]; | |
1549 | ||
1550 | oprom = call_prom("finddevice", 1, 1, ADDR("/openprom")); | |
1551 | if (!PHANDLE_VALID(oprom)) | |
1552 | return; | |
1553 | if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0) | |
1554 | return; | |
1555 | version[sizeof(version) - 1] = 0; | |
a575b807 | 1556 | /* XXX might need to add other versions here */ |
a23414be PM |
1557 | if (strcmp(version, "Open Firmware, 1.0.5") == 0) |
1558 | of_workarounds = OF_WA_CLAIM; | |
1559 | else if (strncmp(version, "FirmWorks,3.", 12) == 0) { | |
1560 | of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL; | |
1561 | call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim"); | |
1562 | } else | |
a575b807 | 1563 | return; |
a23414be | 1564 | _prom->memory = call_prom("open", 1, 1, ADDR("/memory")); |
a575b807 PM |
1565 | prom_getprop(_prom->chosen, "mmu", &_prom->mmumap, |
1566 | sizeof(_prom->mmumap)); | |
a23414be PM |
1567 | if (!IHANDLE_VALID(_prom->memory) || !IHANDLE_VALID(_prom->mmumap)) |
1568 | of_workarounds &= ~OF_WA_CLAIM; /* hmmm */ | |
9b6b563c | 1569 | } |
a575b807 PM |
1570 | #else |
1571 | #define prom_find_mmu() | |
1572 | #endif | |
9b6b563c PM |
1573 | |
1574 | static void __init prom_init_stdout(void) | |
1575 | { | |
1576 | struct prom_t *_prom = &RELOC(prom); | |
1577 | char *path = RELOC(of_stdout_device); | |
1578 | char type[16]; | |
1579 | u32 val; | |
1580 | ||
1581 | if (prom_getprop(_prom->chosen, "stdout", &val, sizeof(val)) <= 0) | |
1582 | prom_panic("cannot find stdout"); | |
1583 | ||
1584 | _prom->stdout = val; | |
1585 | ||
1586 | /* Get the full OF pathname of the stdout device */ | |
1587 | memset(path, 0, 256); | |
1588 | call_prom("instance-to-path", 3, 1, _prom->stdout, path, 255); | |
1589 | val = call_prom("instance-to-package", 1, 1, _prom->stdout); | |
a23414be PM |
1590 | prom_setprop(_prom->chosen, "/chosen", "linux,stdout-package", |
1591 | &val, sizeof(val)); | |
9b6b563c | 1592 | prom_printf("OF stdout device is: %s\n", RELOC(of_stdout_device)); |
a23414be PM |
1593 | prom_setprop(_prom->chosen, "/chosen", "linux,stdout-path", |
1594 | path, strlen(path) + 1); | |
9b6b563c PM |
1595 | |
1596 | /* If it's a display, note it */ | |
1597 | memset(type, 0, sizeof(type)); | |
1598 | prom_getprop(val, "device_type", type, sizeof(type)); | |
1599 | if (strcmp(type, RELOC("display")) == 0) | |
a23414be | 1600 | prom_setprop(val, path, "linux,boot-display", NULL, 0); |
9b6b563c PM |
1601 | } |
1602 | ||
1603 | static void __init prom_close_stdin(void) | |
1604 | { | |
1605 | struct prom_t *_prom = &RELOC(prom); | |
1606 | ihandle val; | |
1607 | ||
1608 | if (prom_getprop(_prom->chosen, "stdin", &val, sizeof(val)) > 0) | |
1609 | call_prom("close", 1, 0, val); | |
1610 | } | |
1611 | ||
1612 | static int __init prom_find_machine_type(void) | |
1613 | { | |
1614 | struct prom_t *_prom = &RELOC(prom); | |
1615 | char compat[256]; | |
1616 | int len, i = 0; | |
21fe3301 | 1617 | #ifdef CONFIG_PPC64 |
9b6b563c | 1618 | phandle rtas; |
e8222502 | 1619 | int x; |
21fe3301 | 1620 | #endif |
e8222502 BH |
1621 | |
1622 | /* Look for a PowerMac */ | |
9b6b563c PM |
1623 | len = prom_getprop(_prom->root, "compatible", |
1624 | compat, sizeof(compat)-1); | |
1625 | if (len > 0) { | |
1626 | compat[len] = 0; | |
1627 | while (i < len) { | |
1628 | char *p = &compat[i]; | |
1629 | int sl = strlen(p); | |
1630 | if (sl == 0) | |
1631 | break; | |
1632 | if (strstr(p, RELOC("Power Macintosh")) || | |
a575b807 | 1633 | strstr(p, RELOC("MacRISC"))) |
9b6b563c | 1634 | return PLATFORM_POWERMAC; |
133dda1e AB |
1635 | #ifdef CONFIG_PPC64 |
1636 | /* We must make sure we don't detect the IBM Cell | |
1637 | * blades as pSeries due to some firmware issues, | |
1638 | * so we do it here. | |
1639 | */ | |
1640 | if (strstr(p, RELOC("IBM,CBEA")) || | |
1641 | strstr(p, RELOC("IBM,CPBW-1.0"))) | |
1642 | return PLATFORM_GENERIC; | |
1643 | #endif /* CONFIG_PPC64 */ | |
9b6b563c PM |
1644 | i += sl + 1; |
1645 | } | |
1646 | } | |
1647 | #ifdef CONFIG_PPC64 | |
e8222502 BH |
1648 | /* If not a mac, try to figure out if it's an IBM pSeries or any other |
1649 | * PAPR compliant platform. We assume it is if : | |
1650 | * - /device_type is "chrp" (please, do NOT use that for future | |
1651 | * non-IBM designs ! | |
1652 | * - it has /rtas | |
1653 | */ | |
6f806cee | 1654 | len = prom_getprop(_prom->root, "device_type", |
e8222502 BH |
1655 | compat, sizeof(compat)-1); |
1656 | if (len <= 0) | |
1657 | return PLATFORM_GENERIC; | |
cb6b2eb9 | 1658 | if (strcmp(compat, RELOC("chrp"))) |
e8222502 BH |
1659 | return PLATFORM_GENERIC; |
1660 | ||
9b6b563c PM |
1661 | /* Default to pSeries. We need to know if we are running LPAR */ |
1662 | rtas = call_prom("finddevice", 1, 1, ADDR("/rtas")); | |
e8222502 BH |
1663 | if (!PHANDLE_VALID(rtas)) |
1664 | return PLATFORM_GENERIC; | |
1665 | x = prom_getproplen(rtas, "ibm,hypertas-functions"); | |
1666 | if (x != PROM_ERROR) { | |
4da727ae | 1667 | prom_debug("Hypertas detected, assuming LPAR !\n"); |
e8222502 | 1668 | return PLATFORM_PSERIES_LPAR; |
9b6b563c PM |
1669 | } |
1670 | return PLATFORM_PSERIES; | |
1671 | #else | |
e8222502 | 1672 | return PLATFORM_GENERIC; |
9b6b563c PM |
1673 | #endif |
1674 | } | |
1675 | ||
9b6b563c PM |
1676 | static int __init prom_set_color(ihandle ih, int i, int r, int g, int b) |
1677 | { | |
1678 | return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r); | |
1679 | } | |
1680 | ||
1681 | /* | |
1682 | * If we have a display that we don't know how to drive, | |
1683 | * we will want to try to execute OF's open method for it | |
1684 | * later. However, OF will probably fall over if we do that | |
1685 | * we've taken over the MMU. | |
1686 | * So we check whether we will need to open the display, | |
1687 | * and if so, open it now. | |
1688 | */ | |
1689 | static void __init prom_check_displays(void) | |
1690 | { | |
1691 | char type[16], *path; | |
1692 | phandle node; | |
1693 | ihandle ih; | |
1694 | int i; | |
9b6b563c PM |
1695 | |
1696 | static unsigned char default_colors[] = { | |
1697 | 0x00, 0x00, 0x00, | |
1698 | 0x00, 0x00, 0xaa, | |
1699 | 0x00, 0xaa, 0x00, | |
1700 | 0x00, 0xaa, 0xaa, | |
1701 | 0xaa, 0x00, 0x00, | |
1702 | 0xaa, 0x00, 0xaa, | |
1703 | 0xaa, 0xaa, 0x00, | |
1704 | 0xaa, 0xaa, 0xaa, | |
1705 | 0x55, 0x55, 0x55, | |
1706 | 0x55, 0x55, 0xff, | |
1707 | 0x55, 0xff, 0x55, | |
1708 | 0x55, 0xff, 0xff, | |
1709 | 0xff, 0x55, 0x55, | |
1710 | 0xff, 0x55, 0xff, | |
1711 | 0xff, 0xff, 0x55, | |
1712 | 0xff, 0xff, 0xff | |
1713 | }; | |
1714 | const unsigned char *clut; | |
1715 | ||
4da727ae | 1716 | prom_debug("Looking for displays\n"); |
9b6b563c PM |
1717 | for (node = 0; prom_next_node(&node); ) { |
1718 | memset(type, 0, sizeof(type)); | |
1719 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1720 | if (strcmp(type, RELOC("display")) != 0) | |
1721 | continue; | |
1722 | ||
1723 | /* It seems OF doesn't null-terminate the path :-( */ | |
1724 | path = RELOC(prom_scratch); | |
1725 | memset(path, 0, PROM_SCRATCH_SIZE); | |
1726 | ||
1727 | /* | |
1728 | * leave some room at the end of the path for appending extra | |
1729 | * arguments | |
1730 | */ | |
1731 | if (call_prom("package-to-path", 3, 1, node, path, | |
1732 | PROM_SCRATCH_SIZE-10) == PROM_ERROR) | |
1733 | continue; | |
1f8737aa | 1734 | prom_printf("found display : %s, opening... ", path); |
9b6b563c PM |
1735 | |
1736 | ih = call_prom("open", 1, 1, path); | |
1737 | if (ih == 0) { | |
1738 | prom_printf("failed\n"); | |
1739 | continue; | |
1740 | } | |
1741 | ||
1742 | /* Success */ | |
1743 | prom_printf("done\n"); | |
a23414be | 1744 | prom_setprop(node, path, "linux,opened", NULL, 0); |
9b6b563c PM |
1745 | |
1746 | /* Setup a usable color table when the appropriate | |
1747 | * method is available. Should update this to set-colors */ | |
1748 | clut = RELOC(default_colors); | |
1749 | for (i = 0; i < 32; i++, clut += 3) | |
1750 | if (prom_set_color(ih, i, clut[0], clut[1], | |
1751 | clut[2]) != 0) | |
1752 | break; | |
1753 | ||
1754 | #ifdef CONFIG_LOGO_LINUX_CLUT224 | |
1755 | clut = PTRRELOC(RELOC(logo_linux_clut224.clut)); | |
1756 | for (i = 0; i < RELOC(logo_linux_clut224.clutsize); i++, clut += 3) | |
1757 | if (prom_set_color(ih, i + 32, clut[0], clut[1], | |
1758 | clut[2]) != 0) | |
1759 | break; | |
1760 | #endif /* CONFIG_LOGO_LINUX_CLUT224 */ | |
9b6b563c PM |
1761 | } |
1762 | } | |
1763 | ||
1764 | ||
1765 | /* Return (relocated) pointer to this much memory: moves initrd if reqd. */ | |
1766 | static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end, | |
1767 | unsigned long needed, unsigned long align) | |
1768 | { | |
1769 | void *ret; | |
1770 | ||
1771 | *mem_start = _ALIGN(*mem_start, align); | |
1772 | while ((*mem_start + needed) > *mem_end) { | |
1773 | unsigned long room, chunk; | |
1774 | ||
1775 | prom_debug("Chunk exhausted, claiming more at %x...\n", | |
1776 | RELOC(alloc_bottom)); | |
1777 | room = RELOC(alloc_top) - RELOC(alloc_bottom); | |
1778 | if (room > DEVTREE_CHUNK_SIZE) | |
1779 | room = DEVTREE_CHUNK_SIZE; | |
1780 | if (room < PAGE_SIZE) | |
1781 | prom_panic("No memory for flatten_device_tree (no room)"); | |
1782 | chunk = alloc_up(room, 0); | |
1783 | if (chunk == 0) | |
1784 | prom_panic("No memory for flatten_device_tree (claim failed)"); | |
1785 | *mem_end = RELOC(alloc_top); | |
1786 | } | |
1787 | ||
1788 | ret = (void *)*mem_start; | |
1789 | *mem_start += needed; | |
1790 | ||
1791 | return ret; | |
1792 | } | |
1793 | ||
1794 | #define dt_push_token(token, mem_start, mem_end) \ | |
1795 | do { *((u32 *)make_room(mem_start, mem_end, 4, 4)) = token; } while(0) | |
1796 | ||
1797 | static unsigned long __init dt_find_string(char *str) | |
1798 | { | |
1799 | char *s, *os; | |
1800 | ||
1801 | s = os = (char *)RELOC(dt_string_start); | |
1802 | s += 4; | |
1803 | while (s < (char *)RELOC(dt_string_end)) { | |
1804 | if (strcmp(s, str) == 0) | |
1805 | return s - os; | |
1806 | s += strlen(s) + 1; | |
1807 | } | |
1808 | return 0; | |
1809 | } | |
1810 | ||
1811 | /* | |
1812 | * The Open Firmware 1275 specification states properties must be 31 bytes or | |
1813 | * less, however not all firmwares obey this. Make it 64 bytes to be safe. | |
1814 | */ | |
1815 | #define MAX_PROPERTY_NAME 64 | |
1816 | ||
1817 | static void __init scan_dt_build_strings(phandle node, | |
1818 | unsigned long *mem_start, | |
1819 | unsigned long *mem_end) | |
1820 | { | |
1821 | char *prev_name, *namep, *sstart; | |
1822 | unsigned long soff; | |
1823 | phandle child; | |
1824 | ||
1825 | sstart = (char *)RELOC(dt_string_start); | |
1826 | ||
1827 | /* get and store all property names */ | |
1828 | prev_name = RELOC(""); | |
1829 | for (;;) { | |
1830 | /* 64 is max len of name including nul. */ | |
1831 | namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1); | |
1832 | if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) { | |
1833 | /* No more nodes: unwind alloc */ | |
1834 | *mem_start = (unsigned long)namep; | |
1835 | break; | |
1836 | } | |
1837 | ||
1838 | /* skip "name" */ | |
1839 | if (strcmp(namep, RELOC("name")) == 0) { | |
1840 | *mem_start = (unsigned long)namep; | |
1841 | prev_name = RELOC("name"); | |
1842 | continue; | |
1843 | } | |
1844 | /* get/create string entry */ | |
1845 | soff = dt_find_string(namep); | |
1846 | if (soff != 0) { | |
1847 | *mem_start = (unsigned long)namep; | |
1848 | namep = sstart + soff; | |
1849 | } else { | |
1850 | /* Trim off some if we can */ | |
1851 | *mem_start = (unsigned long)namep + strlen(namep) + 1; | |
1852 | RELOC(dt_string_end) = *mem_start; | |
1853 | } | |
1854 | prev_name = namep; | |
1855 | } | |
1856 | ||
1857 | /* do all our children */ | |
1858 | child = call_prom("child", 1, 1, node); | |
1859 | while (child != 0) { | |
1860 | scan_dt_build_strings(child, mem_start, mem_end); | |
1861 | child = call_prom("peer", 1, 1, child); | |
1862 | } | |
1863 | } | |
1864 | ||
1865 | static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start, | |
1866 | unsigned long *mem_end) | |
1867 | { | |
1868 | phandle child; | |
1869 | char *namep, *prev_name, *sstart, *p, *ep, *lp, *path; | |
1870 | unsigned long soff; | |
1871 | unsigned char *valp; | |
1872 | static char pname[MAX_PROPERTY_NAME]; | |
c4988820 | 1873 | int l, room; |
9b6b563c PM |
1874 | |
1875 | dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end); | |
1876 | ||
1877 | /* get the node's full name */ | |
1878 | namep = (char *)*mem_start; | |
c4988820 PM |
1879 | room = *mem_end - *mem_start; |
1880 | if (room > 255) | |
1881 | room = 255; | |
1882 | l = call_prom("package-to-path", 3, 1, node, namep, room); | |
9b6b563c PM |
1883 | if (l >= 0) { |
1884 | /* Didn't fit? Get more room. */ | |
c4988820 PM |
1885 | if (l >= room) { |
1886 | if (l >= *mem_end - *mem_start) | |
1887 | namep = make_room(mem_start, mem_end, l+1, 1); | |
9b6b563c PM |
1888 | call_prom("package-to-path", 3, 1, node, namep, l); |
1889 | } | |
1890 | namep[l] = '\0'; | |
1891 | ||
1892 | /* Fixup an Apple bug where they have bogus \0 chars in the | |
a575b807 PM |
1893 | * middle of the path in some properties, and extract |
1894 | * the unit name (everything after the last '/'). | |
9b6b563c | 1895 | */ |
a575b807 | 1896 | for (lp = p = namep, ep = namep + l; p < ep; p++) { |
9b6b563c | 1897 | if (*p == '/') |
a575b807 PM |
1898 | lp = namep; |
1899 | else if (*p != 0) | |
1900 | *lp++ = *p; | |
1901 | } | |
1902 | *lp = 0; | |
1903 | *mem_start = _ALIGN((unsigned long)lp + 1, 4); | |
9b6b563c PM |
1904 | } |
1905 | ||
1906 | /* get it again for debugging */ | |
1907 | path = RELOC(prom_scratch); | |
1908 | memset(path, 0, PROM_SCRATCH_SIZE); | |
1909 | call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); | |
1910 | ||
1911 | /* get and store all properties */ | |
1912 | prev_name = RELOC(""); | |
1913 | sstart = (char *)RELOC(dt_string_start); | |
1914 | for (;;) { | |
1915 | if (call_prom("nextprop", 3, 1, node, prev_name, | |
1916 | RELOC(pname)) != 1) | |
1917 | break; | |
1918 | ||
1919 | /* skip "name" */ | |
1920 | if (strcmp(RELOC(pname), RELOC("name")) == 0) { | |
1921 | prev_name = RELOC("name"); | |
1922 | continue; | |
1923 | } | |
1924 | ||
1925 | /* find string offset */ | |
1926 | soff = dt_find_string(RELOC(pname)); | |
1927 | if (soff == 0) { | |
1928 | prom_printf("WARNING: Can't find string index for" | |
1929 | " <%s>, node %s\n", RELOC(pname), path); | |
1930 | break; | |
1931 | } | |
1932 | prev_name = sstart + soff; | |
1933 | ||
1934 | /* get length */ | |
1935 | l = call_prom("getproplen", 2, 1, node, RELOC(pname)); | |
1936 | ||
1937 | /* sanity checks */ | |
1938 | if (l == PROM_ERROR) | |
1939 | continue; | |
1940 | if (l > MAX_PROPERTY_LENGTH) { | |
1941 | prom_printf("WARNING: ignoring large property "); | |
1942 | /* It seems OF doesn't null-terminate the path :-( */ | |
1943 | prom_printf("[%s] ", path); | |
1944 | prom_printf("%s length 0x%x\n", RELOC(pname), l); | |
1945 | continue; | |
1946 | } | |
1947 | ||
1948 | /* push property head */ | |
1949 | dt_push_token(OF_DT_PROP, mem_start, mem_end); | |
1950 | dt_push_token(l, mem_start, mem_end); | |
1951 | dt_push_token(soff, mem_start, mem_end); | |
1952 | ||
1953 | /* push property content */ | |
1954 | valp = make_room(mem_start, mem_end, l, 4); | |
1955 | call_prom("getprop", 4, 1, node, RELOC(pname), valp, l); | |
1956 | *mem_start = _ALIGN(*mem_start, 4); | |
1957 | } | |
1958 | ||
1959 | /* Add a "linux,phandle" property. */ | |
1960 | soff = dt_find_string(RELOC("linux,phandle")); | |
1961 | if (soff == 0) | |
1962 | prom_printf("WARNING: Can't find string index for" | |
1963 | " <linux-phandle> node %s\n", path); | |
1964 | else { | |
1965 | dt_push_token(OF_DT_PROP, mem_start, mem_end); | |
1966 | dt_push_token(4, mem_start, mem_end); | |
1967 | dt_push_token(soff, mem_start, mem_end); | |
1968 | valp = make_room(mem_start, mem_end, 4, 4); | |
1969 | *(u32 *)valp = node; | |
1970 | } | |
1971 | ||
1972 | /* do all our children */ | |
1973 | child = call_prom("child", 1, 1, node); | |
1974 | while (child != 0) { | |
1975 | scan_dt_build_struct(child, mem_start, mem_end); | |
1976 | child = call_prom("peer", 1, 1, child); | |
1977 | } | |
1978 | ||
1979 | dt_push_token(OF_DT_END_NODE, mem_start, mem_end); | |
1980 | } | |
1981 | ||
1982 | static void __init flatten_device_tree(void) | |
1983 | { | |
1984 | phandle root; | |
1985 | unsigned long mem_start, mem_end, room; | |
1986 | struct boot_param_header *hdr; | |
1987 | struct prom_t *_prom = &RELOC(prom); | |
1988 | char *namep; | |
1989 | u64 *rsvmap; | |
1990 | ||
1991 | /* | |
1992 | * Check how much room we have between alloc top & bottom (+/- a | |
1993 | * few pages), crop to 4Mb, as this is our "chuck" size | |
1994 | */ | |
1995 | room = RELOC(alloc_top) - RELOC(alloc_bottom) - 0x4000; | |
1996 | if (room > DEVTREE_CHUNK_SIZE) | |
1997 | room = DEVTREE_CHUNK_SIZE; | |
1998 | prom_debug("starting device tree allocs at %x\n", RELOC(alloc_bottom)); | |
1999 | ||
2000 | /* Now try to claim that */ | |
2001 | mem_start = (unsigned long)alloc_up(room, PAGE_SIZE); | |
2002 | if (mem_start == 0) | |
2003 | prom_panic("Can't allocate initial device-tree chunk\n"); | |
2004 | mem_end = RELOC(alloc_top); | |
2005 | ||
2006 | /* Get root of tree */ | |
2007 | root = call_prom("peer", 1, 1, (phandle)0); | |
2008 | if (root == (phandle)0) | |
2009 | prom_panic ("couldn't get device tree root\n"); | |
2010 | ||
2011 | /* Build header and make room for mem rsv map */ | |
2012 | mem_start = _ALIGN(mem_start, 4); | |
2013 | hdr = make_room(&mem_start, &mem_end, | |
2014 | sizeof(struct boot_param_header), 4); | |
2015 | RELOC(dt_header_start) = (unsigned long)hdr; | |
2016 | rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8); | |
2017 | ||
2018 | /* Start of strings */ | |
2019 | mem_start = PAGE_ALIGN(mem_start); | |
2020 | RELOC(dt_string_start) = mem_start; | |
2021 | mem_start += 4; /* hole */ | |
2022 | ||
2023 | /* Add "linux,phandle" in there, we'll need it */ | |
2024 | namep = make_room(&mem_start, &mem_end, 16, 1); | |
2025 | strcpy(namep, RELOC("linux,phandle")); | |
2026 | mem_start = (unsigned long)namep + strlen(namep) + 1; | |
2027 | ||
2028 | /* Build string array */ | |
2029 | prom_printf("Building dt strings...\n"); | |
2030 | scan_dt_build_strings(root, &mem_start, &mem_end); | |
2031 | RELOC(dt_string_end) = mem_start; | |
2032 | ||
2033 | /* Build structure */ | |
2034 | mem_start = PAGE_ALIGN(mem_start); | |
2035 | RELOC(dt_struct_start) = mem_start; | |
2036 | prom_printf("Building dt structure...\n"); | |
2037 | scan_dt_build_struct(root, &mem_start, &mem_end); | |
2038 | dt_push_token(OF_DT_END, &mem_start, &mem_end); | |
2039 | RELOC(dt_struct_end) = PAGE_ALIGN(mem_start); | |
2040 | ||
2041 | /* Finish header */ | |
2042 | hdr->boot_cpuid_phys = _prom->cpu; | |
2043 | hdr->magic = OF_DT_HEADER; | |
2044 | hdr->totalsize = RELOC(dt_struct_end) - RELOC(dt_header_start); | |
2045 | hdr->off_dt_struct = RELOC(dt_struct_start) - RELOC(dt_header_start); | |
2046 | hdr->off_dt_strings = RELOC(dt_string_start) - RELOC(dt_header_start); | |
2047 | hdr->dt_strings_size = RELOC(dt_string_end) - RELOC(dt_string_start); | |
2048 | hdr->off_mem_rsvmap = ((unsigned long)rsvmap) - RELOC(dt_header_start); | |
2049 | hdr->version = OF_DT_VERSION; | |
2050 | /* Version 16 is not backward compatible */ | |
2051 | hdr->last_comp_version = 0x10; | |
2052 | ||
4d1f3f25 | 2053 | /* Copy the reserve map in */ |
9b6b563c PM |
2054 | memcpy(rsvmap, RELOC(mem_reserve_map), sizeof(mem_reserve_map)); |
2055 | ||
2056 | #ifdef DEBUG_PROM | |
2057 | { | |
2058 | int i; | |
2059 | prom_printf("reserved memory map:\n"); | |
2060 | for (i = 0; i < RELOC(mem_reserve_cnt); i++) | |
2061 | prom_printf(" %x - %x\n", | |
2062 | RELOC(mem_reserve_map)[i].base, | |
2063 | RELOC(mem_reserve_map)[i].size); | |
2064 | } | |
2065 | #endif | |
4d1f3f25 JX |
2066 | /* Bump mem_reserve_cnt to cause further reservations to fail |
2067 | * since it's too late. | |
2068 | */ | |
9b6b563c PM |
2069 | RELOC(mem_reserve_cnt) = MEM_RESERVE_MAP_SIZE; |
2070 | ||
2071 | prom_printf("Device tree strings 0x%x -> 0x%x\n", | |
2072 | RELOC(dt_string_start), RELOC(dt_string_end)); | |
2073 | prom_printf("Device tree struct 0x%x -> 0x%x\n", | |
2074 | RELOC(dt_struct_start), RELOC(dt_struct_end)); | |
2075 | ||
2076 | } | |
2077 | ||
54f4ee18 HB |
2078 | #ifdef CONFIG_PPC_MAPLE |
2079 | /* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property. | |
2080 | * The values are bad, and it doesn't even have the right number of cells. */ | |
2081 | static void __init fixup_device_tree_maple(void) | |
9b6b563c | 2082 | { |
54f4ee18 | 2083 | phandle isa; |
980a6513 | 2084 | u32 rloc = 0x01002000; /* IO space; PCI device = 4 */ |
54f4ee18 | 2085 | u32 isa_ranges[6]; |
980a6513 BH |
2086 | char *name; |
2087 | ||
2088 | name = "/ht@0/isa@4"; | |
2089 | isa = call_prom("finddevice", 1, 1, ADDR(name)); | |
2090 | if (!PHANDLE_VALID(isa)) { | |
2091 | name = "/ht@0/isa@6"; | |
2092 | isa = call_prom("finddevice", 1, 1, ADDR(name)); | |
2093 | rloc = 0x01003000; /* IO space; PCI device = 6 */ | |
2094 | } | |
54f4ee18 HB |
2095 | if (!PHANDLE_VALID(isa)) |
2096 | return; | |
2097 | ||
980a6513 BH |
2098 | if (prom_getproplen(isa, "ranges") != 12) |
2099 | return; | |
54f4ee18 HB |
2100 | if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges)) |
2101 | == PROM_ERROR) | |
2102 | return; | |
2103 | ||
2104 | if (isa_ranges[0] != 0x1 || | |
2105 | isa_ranges[1] != 0xf4000000 || | |
2106 | isa_ranges[2] != 0x00010000) | |
2107 | return; | |
2108 | ||
980a6513 | 2109 | prom_printf("Fixing up bogus ISA range on Maple/Apache...\n"); |
54f4ee18 HB |
2110 | |
2111 | isa_ranges[0] = 0x1; | |
2112 | isa_ranges[1] = 0x0; | |
980a6513 | 2113 | isa_ranges[2] = rloc; |
54f4ee18 HB |
2114 | isa_ranges[3] = 0x0; |
2115 | isa_ranges[4] = 0x0; | |
2116 | isa_ranges[5] = 0x00010000; | |
980a6513 | 2117 | prom_setprop(isa, name, "ranges", |
54f4ee18 HB |
2118 | isa_ranges, sizeof(isa_ranges)); |
2119 | } | |
8f101a05 HC |
2120 | |
2121 | #define CPC925_MC_START 0xf8000000 | |
2122 | #define CPC925_MC_LENGTH 0x1000000 | |
2123 | /* The values for memory-controller don't have right number of cells */ | |
2124 | static void __init fixup_device_tree_maple_memory_controller(void) | |
2125 | { | |
2126 | phandle mc; | |
2127 | u32 mc_reg[4]; | |
2128 | char *name = "/hostbridge@f8000000"; | |
2129 | struct prom_t *_prom = &RELOC(prom); | |
2130 | u32 ac, sc; | |
2131 | ||
2132 | mc = call_prom("finddevice", 1, 1, ADDR(name)); | |
2133 | if (!PHANDLE_VALID(mc)) | |
2134 | return; | |
2135 | ||
2136 | if (prom_getproplen(mc, "reg") != 8) | |
2137 | return; | |
2138 | ||
2139 | prom_getprop(_prom->root, "#address-cells", &ac, sizeof(ac)); | |
2140 | prom_getprop(_prom->root, "#size-cells", &sc, sizeof(sc)); | |
2141 | if ((ac != 2) || (sc != 2)) | |
2142 | return; | |
2143 | ||
2144 | if (prom_getprop(mc, "reg", mc_reg, sizeof(mc_reg)) == PROM_ERROR) | |
2145 | return; | |
2146 | ||
2147 | if (mc_reg[0] != CPC925_MC_START || mc_reg[1] != CPC925_MC_LENGTH) | |
2148 | return; | |
2149 | ||
2150 | prom_printf("Fixing up bogus hostbridge on Maple...\n"); | |
2151 | ||
2152 | mc_reg[0] = 0x0; | |
2153 | mc_reg[1] = CPC925_MC_START; | |
2154 | mc_reg[2] = 0x0; | |
2155 | mc_reg[3] = CPC925_MC_LENGTH; | |
2156 | prom_setprop(mc, name, "reg", mc_reg, sizeof(mc_reg)); | |
2157 | } | |
54f4ee18 HB |
2158 | #else |
2159 | #define fixup_device_tree_maple() | |
8f101a05 | 2160 | #define fixup_device_tree_maple_memory_controller() |
54f4ee18 HB |
2161 | #endif |
2162 | ||
e8c0acf9 | 2163 | #ifdef CONFIG_PPC_CHRP |
e4805922 OH |
2164 | /* |
2165 | * Pegasos and BriQ lacks the "ranges" property in the isa node | |
2166 | * Pegasos needs decimal IRQ 14/15, not hexadecimal | |
556ecf9b | 2167 | * Pegasos has the IDE configured in legacy mode, but advertised as native |
e4805922 | 2168 | */ |
e8c0acf9 BH |
2169 | static void __init fixup_device_tree_chrp(void) |
2170 | { | |
e4805922 OH |
2171 | phandle ph; |
2172 | u32 prop[6]; | |
26c5032e | 2173 | u32 rloc = 0x01006000; /* IO space; PCI device = 12 */ |
e8c0acf9 BH |
2174 | char *name; |
2175 | int rc; | |
2176 | ||
2177 | name = "/pci@80000000/isa@c"; | |
e4805922 OH |
2178 | ph = call_prom("finddevice", 1, 1, ADDR(name)); |
2179 | if (!PHANDLE_VALID(ph)) { | |
26c5032e | 2180 | name = "/pci@ff500000/isa@6"; |
e4805922 | 2181 | ph = call_prom("finddevice", 1, 1, ADDR(name)); |
26c5032e BH |
2182 | rloc = 0x01003000; /* IO space; PCI device = 6 */ |
2183 | } | |
e4805922 OH |
2184 | if (PHANDLE_VALID(ph)) { |
2185 | rc = prom_getproplen(ph, "ranges"); | |
2186 | if (rc == 0 || rc == PROM_ERROR) { | |
2187 | prom_printf("Fixing up missing ISA range on Pegasos...\n"); | |
2188 | ||
2189 | prop[0] = 0x1; | |
2190 | prop[1] = 0x0; | |
2191 | prop[2] = rloc; | |
2192 | prop[3] = 0x0; | |
2193 | prop[4] = 0x0; | |
2194 | prop[5] = 0x00010000; | |
2195 | prom_setprop(ph, name, "ranges", prop, sizeof(prop)); | |
2196 | } | |
2197 | } | |
e8c0acf9 | 2198 | |
e4805922 OH |
2199 | name = "/pci@80000000/ide@C,1"; |
2200 | ph = call_prom("finddevice", 1, 1, ADDR(name)); | |
2201 | if (PHANDLE_VALID(ph)) { | |
2202 | prom_printf("Fixing up IDE interrupt on Pegasos...\n"); | |
2203 | prop[0] = 14; | |
2204 | prop[1] = 0x0; | |
556ecf9b OH |
2205 | prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32)); |
2206 | prom_printf("Fixing up IDE class-code on Pegasos...\n"); | |
2207 | rc = prom_getprop(ph, "class-code", prop, sizeof(u32)); | |
2208 | if (rc == sizeof(u32)) { | |
2209 | prop[0] &= ~0x5; | |
2210 | prom_setprop(ph, name, "class-code", prop, sizeof(u32)); | |
2211 | } | |
e4805922 | 2212 | } |
e8c0acf9 BH |
2213 | } |
2214 | #else | |
2215 | #define fixup_device_tree_chrp() | |
2216 | #endif | |
2217 | ||
9b6b563c | 2218 | #if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC) |
54f4ee18 HB |
2219 | static void __init fixup_device_tree_pmac(void) |
2220 | { | |
9b6b563c PM |
2221 | phandle u3, i2c, mpic; |
2222 | u32 u3_rev; | |
2223 | u32 interrupts[2]; | |
2224 | u32 parent; | |
2225 | ||
2226 | /* Some G5s have a missing interrupt definition, fix it up here */ | |
2227 | u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000")); | |
2228 | if (!PHANDLE_VALID(u3)) | |
2229 | return; | |
2230 | i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000")); | |
2231 | if (!PHANDLE_VALID(i2c)) | |
2232 | return; | |
2233 | mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000")); | |
2234 | if (!PHANDLE_VALID(mpic)) | |
2235 | return; | |
2236 | ||
2237 | /* check if proper rev of u3 */ | |
2238 | if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev)) | |
2239 | == PROM_ERROR) | |
2240 | return; | |
7d49697e | 2241 | if (u3_rev < 0x35 || u3_rev > 0x39) |
9b6b563c PM |
2242 | return; |
2243 | /* does it need fixup ? */ | |
2244 | if (prom_getproplen(i2c, "interrupts") > 0) | |
2245 | return; | |
2246 | ||
2247 | prom_printf("fixing up bogus interrupts for u3 i2c...\n"); | |
2248 | ||
2249 | /* interrupt on this revision of u3 is number 0 and level */ | |
2250 | interrupts[0] = 0; | |
2251 | interrupts[1] = 1; | |
a23414be PM |
2252 | prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts", |
2253 | &interrupts, sizeof(interrupts)); | |
9b6b563c | 2254 | parent = (u32)mpic; |
a23414be PM |
2255 | prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent", |
2256 | &parent, sizeof(parent)); | |
9b6b563c | 2257 | } |
54f4ee18 HB |
2258 | #else |
2259 | #define fixup_device_tree_pmac() | |
2260 | #endif | |
9b6b563c | 2261 | |
88fd2a9d | 2262 | #ifdef CONFIG_PPC_EFIKA |
94d2dde7 GL |
2263 | /* |
2264 | * The MPC5200 FEC driver requires an phy-handle property to tell it how | |
2265 | * to talk to the phy. If the phy-handle property is missing, then this | |
2266 | * function is called to add the appropriate nodes and link it to the | |
2267 | * ethernet node. | |
2268 | */ | |
2269 | static void __init fixup_device_tree_efika_add_phy(void) | |
88fd2a9d | 2270 | { |
88fd2a9d SM |
2271 | u32 node; |
2272 | char prop[64]; | |
94d2dde7 | 2273 | int rv; |
88fd2a9d | 2274 | |
94d2dde7 GL |
2275 | /* Check if /builtin/ethernet exists - bail if it doesn't */ |
2276 | node = call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet")); | |
88fd2a9d SM |
2277 | if (!PHANDLE_VALID(node)) |
2278 | return; | |
2279 | ||
94d2dde7 GL |
2280 | /* Check if the phy-handle property exists - bail if it does */ |
2281 | rv = prom_getprop(node, "phy-handle", prop, sizeof(prop)); | |
2282 | if (!rv) | |
88fd2a9d SM |
2283 | return; |
2284 | ||
94d2dde7 GL |
2285 | /* |
2286 | * At this point the ethernet device doesn't have a phy described. | |
2287 | * Now we need to add the missing phy node and linkage | |
2288 | */ | |
6f4347c9 | 2289 | |
94d2dde7 | 2290 | /* Check for an MDIO bus node - if missing then create one */ |
6f4347c9 OH |
2291 | node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio")); |
2292 | if (!PHANDLE_VALID(node)) { | |
2293 | prom_printf("Adding Ethernet MDIO node\n"); | |
2294 | call_prom("interpret", 1, 1, | |
2295 | " s\" /builtin\" find-device" | |
2296 | " new-device" | |
2297 | " 1 encode-int s\" #address-cells\" property" | |
2298 | " 0 encode-int s\" #size-cells\" property" | |
94d2dde7 GL |
2299 | " s\" mdio\" device-name" |
2300 | " s\" fsl,mpc5200b-mdio\" encode-string" | |
6f4347c9 OH |
2301 | " s\" compatible\" property" |
2302 | " 0xf0003000 0x400 reg" | |
2303 | " 0x2 encode-int" | |
2304 | " 0x5 encode-int encode+" | |
2305 | " 0x3 encode-int encode+" | |
2306 | " s\" interrupts\" property" | |
2307 | " finish-device"); | |
2308 | }; | |
2309 | ||
94d2dde7 GL |
2310 | /* Check for a PHY device node - if missing then create one and |
2311 | * give it's phandle to the ethernet node */ | |
2312 | node = call_prom("finddevice", 1, 1, | |
2313 | ADDR("/builtin/mdio/ethernet-phy")); | |
6f4347c9 OH |
2314 | if (!PHANDLE_VALID(node)) { |
2315 | prom_printf("Adding Ethernet PHY node\n"); | |
2316 | call_prom("interpret", 1, 1, | |
2317 | " s\" /builtin/mdio\" find-device" | |
2318 | " new-device" | |
2319 | " s\" ethernet-phy\" device-name" | |
2320 | " 0x10 encode-int s\" reg\" property" | |
2321 | " my-self" | |
2322 | " ihandle>phandle" | |
2323 | " finish-device" | |
2324 | " s\" /builtin/ethernet\" find-device" | |
2325 | " encode-int" | |
2326 | " s\" phy-handle\" property" | |
2327 | " device-end"); | |
2328 | } | |
94d2dde7 GL |
2329 | } |
2330 | ||
2331 | static void __init fixup_device_tree_efika(void) | |
2332 | { | |
2333 | int sound_irq[3] = { 2, 2, 0 }; | |
2334 | int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0, | |
2335 | 3,4,0, 3,5,0, 3,6,0, 3,7,0, | |
2336 | 3,8,0, 3,9,0, 3,10,0, 3,11,0, | |
2337 | 3,12,0, 3,13,0, 3,14,0, 3,15,0 }; | |
2338 | u32 node; | |
2339 | char prop[64]; | |
2340 | int rv, len; | |
2341 | ||
2342 | /* Check if we're really running on a EFIKA */ | |
2343 | node = call_prom("finddevice", 1, 1, ADDR("/")); | |
2344 | if (!PHANDLE_VALID(node)) | |
2345 | return; | |
2346 | ||
2347 | rv = prom_getprop(node, "model", prop, sizeof(prop)); | |
2348 | if (rv == PROM_ERROR) | |
2349 | return; | |
2350 | if (strcmp(prop, "EFIKA5K2")) | |
2351 | return; | |
2352 | ||
2353 | prom_printf("Applying EFIKA device tree fixups\n"); | |
2354 | ||
2355 | /* Claiming to be 'chrp' is death */ | |
2356 | node = call_prom("finddevice", 1, 1, ADDR("/")); | |
2357 | rv = prom_getprop(node, "device_type", prop, sizeof(prop)); | |
2358 | if (rv != PROM_ERROR && (strcmp(prop, "chrp") == 0)) | |
2359 | prom_setprop(node, "/", "device_type", "efika", sizeof("efika")); | |
2360 | ||
7f4392cd DW |
2361 | /* CODEGEN,description is exposed in /proc/cpuinfo so |
2362 | fix that too */ | |
2363 | rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop)); | |
2364 | if (rv != PROM_ERROR && (strstr(prop, "CHRP"))) | |
2365 | prom_setprop(node, "/", "CODEGEN,description", | |
2366 | "Efika 5200B PowerPC System", | |
2367 | sizeof("Efika 5200B PowerPC System")); | |
2368 | ||
94d2dde7 GL |
2369 | /* Fixup bestcomm interrupts property */ |
2370 | node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm")); | |
2371 | if (PHANDLE_VALID(node)) { | |
2372 | len = prom_getproplen(node, "interrupts"); | |
2373 | if (len == 12) { | |
2374 | prom_printf("Fixing bestcomm interrupts property\n"); | |
2375 | prom_setprop(node, "/builtin/bestcom", "interrupts", | |
2376 | bcomm_irq, sizeof(bcomm_irq)); | |
2377 | } | |
2378 | } | |
2379 | ||
2380 | /* Fixup sound interrupts property */ | |
2381 | node = call_prom("finddevice", 1, 1, ADDR("/builtin/sound")); | |
2382 | if (PHANDLE_VALID(node)) { | |
2383 | rv = prom_getprop(node, "interrupts", prop, sizeof(prop)); | |
2384 | if (rv == PROM_ERROR) { | |
2385 | prom_printf("Adding sound interrupts property\n"); | |
2386 | prom_setprop(node, "/builtin/sound", "interrupts", | |
2387 | sound_irq, sizeof(sound_irq)); | |
2388 | } | |
2389 | } | |
6f4347c9 | 2390 | |
94d2dde7 GL |
2391 | /* Make sure ethernet phy-handle property exists */ |
2392 | fixup_device_tree_efika_add_phy(); | |
88fd2a9d SM |
2393 | } |
2394 | #else | |
2395 | #define fixup_device_tree_efika() | |
2396 | #endif | |
2397 | ||
54f4ee18 HB |
2398 | static void __init fixup_device_tree(void) |
2399 | { | |
2400 | fixup_device_tree_maple(); | |
8f101a05 | 2401 | fixup_device_tree_maple_memory_controller(); |
e8c0acf9 | 2402 | fixup_device_tree_chrp(); |
54f4ee18 | 2403 | fixup_device_tree_pmac(); |
88fd2a9d | 2404 | fixup_device_tree_efika(); |
54f4ee18 | 2405 | } |
9b6b563c PM |
2406 | |
2407 | static void __init prom_find_boot_cpu(void) | |
2408 | { | |
e788ff13 | 2409 | struct prom_t *_prom = &RELOC(prom); |
9b6b563c PM |
2410 | u32 getprop_rval; |
2411 | ihandle prom_cpu; | |
2412 | phandle cpu_pkg; | |
2413 | ||
a575b807 | 2414 | _prom->cpu = 0; |
9b6b563c | 2415 | if (prom_getprop(_prom->chosen, "cpu", &prom_cpu, sizeof(prom_cpu)) <= 0) |
a575b807 | 2416 | return; |
9b6b563c PM |
2417 | |
2418 | cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu); | |
2419 | ||
2420 | prom_getprop(cpu_pkg, "reg", &getprop_rval, sizeof(getprop_rval)); | |
2421 | _prom->cpu = getprop_rval; | |
2422 | ||
2423 | prom_debug("Booting CPU hw index = 0x%x\n", _prom->cpu); | |
2424 | } | |
2425 | ||
2426 | static void __init prom_check_initrd(unsigned long r3, unsigned long r4) | |
2427 | { | |
2428 | #ifdef CONFIG_BLK_DEV_INITRD | |
e788ff13 | 2429 | struct prom_t *_prom = &RELOC(prom); |
9b6b563c PM |
2430 | |
2431 | if (r3 && r4 && r4 != 0xdeadbeef) { | |
2432 | unsigned long val; | |
2433 | ||
51fae6de | 2434 | RELOC(prom_initrd_start) = is_kernel_addr(r3) ? __pa(r3) : r3; |
9b6b563c PM |
2435 | RELOC(prom_initrd_end) = RELOC(prom_initrd_start) + r4; |
2436 | ||
2437 | val = RELOC(prom_initrd_start); | |
a23414be PM |
2438 | prom_setprop(_prom->chosen, "/chosen", "linux,initrd-start", |
2439 | &val, sizeof(val)); | |
9b6b563c | 2440 | val = RELOC(prom_initrd_end); |
a23414be PM |
2441 | prom_setprop(_prom->chosen, "/chosen", "linux,initrd-end", |
2442 | &val, sizeof(val)); | |
9b6b563c PM |
2443 | |
2444 | reserve_mem(RELOC(prom_initrd_start), | |
2445 | RELOC(prom_initrd_end) - RELOC(prom_initrd_start)); | |
2446 | ||
2447 | prom_debug("initrd_start=0x%x\n", RELOC(prom_initrd_start)); | |
2448 | prom_debug("initrd_end=0x%x\n", RELOC(prom_initrd_end)); | |
2449 | } | |
2450 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
2451 | } | |
2452 | ||
2453 | /* | |
2454 | * We enter here early on, when the Open Firmware prom is still | |
2455 | * handling exceptions and the MMU hash table for us. | |
2456 | */ | |
2457 | ||
2458 | unsigned long __init prom_init(unsigned long r3, unsigned long r4, | |
2459 | unsigned long pp, | |
549e8152 PM |
2460 | unsigned long r6, unsigned long r7, |
2461 | unsigned long kbase) | |
9b6b563c | 2462 | { |
e788ff13 | 2463 | struct prom_t *_prom; |
9b6b563c | 2464 | unsigned long hdr; |
9b6b563c PM |
2465 | |
2466 | #ifdef CONFIG_PPC32 | |
549e8152 | 2467 | unsigned long offset = reloc_offset(); |
9b6b563c PM |
2468 | reloc_got2(offset); |
2469 | #endif | |
2470 | ||
2471 | _prom = &RELOC(prom); | |
2472 | ||
2473 | /* | |
2474 | * First zero the BSS | |
2475 | */ | |
2476 | memset(&RELOC(__bss_start), 0, __bss_stop - __bss_start); | |
2477 | ||
2478 | /* | |
2479 | * Init interface to Open Firmware, get some node references, | |
2480 | * like /chosen | |
2481 | */ | |
2482 | prom_init_client_services(pp); | |
2483 | ||
2484 | /* | |
a23414be PM |
2485 | * See if this OF is old enough that we need to do explicit maps |
2486 | * and other workarounds | |
9b6b563c | 2487 | */ |
a23414be | 2488 | prom_find_mmu(); |
9b6b563c | 2489 | |
a575b807 | 2490 | /* |
a23414be | 2491 | * Init prom stdout device |
a575b807 | 2492 | */ |
a23414be | 2493 | prom_init_stdout(); |
a575b807 | 2494 | |
151a9f4a | 2495 | prom_printf("Preparing to boot %s", RELOC(linux_banner)); |
e7943fbb | 2496 | |
9b6b563c PM |
2497 | /* |
2498 | * Get default machine type. At this point, we do not differentiate | |
2499 | * between pSeries SMP and pSeries LPAR | |
2500 | */ | |
2501 | RELOC(of_platform) = prom_find_machine_type(); | |
9b6b563c | 2502 | |
549e8152 | 2503 | #ifndef CONFIG_RELOCATABLE |
add60ef3 OH |
2504 | /* Bail if this is a kdump kernel. */ |
2505 | if (PHYSICAL_START > 0) | |
2506 | prom_panic("Error: You can't boot a kdump kernel from OF!\n"); | |
549e8152 | 2507 | #endif |
add60ef3 OH |
2508 | |
2509 | /* | |
2510 | * Check for an initrd | |
2511 | */ | |
2512 | prom_check_initrd(r3, r4); | |
2513 | ||
9b6b563c PM |
2514 | #ifdef CONFIG_PPC_PSERIES |
2515 | /* | |
2516 | * On pSeries, inform the firmware about our capabilities | |
2517 | */ | |
799d6046 PM |
2518 | if (RELOC(of_platform) == PLATFORM_PSERIES || |
2519 | RELOC(of_platform) == PLATFORM_PSERIES_LPAR) | |
9b6b563c PM |
2520 | prom_send_capabilities(); |
2521 | #endif | |
2522 | ||
9b6b563c | 2523 | /* |
f3f66f59 | 2524 | * Copy the CPU hold code |
9b6b563c | 2525 | */ |
e788ff13 | 2526 | if (RELOC(of_platform) != PLATFORM_POWERMAC) |
549e8152 | 2527 | copy_and_flush(0, kbase, 0x100, 0); |
9b6b563c PM |
2528 | |
2529 | /* | |
2530 | * Do early parsing of command line | |
2531 | */ | |
2532 | early_cmdline_parse(); | |
2533 | ||
2534 | /* | |
2535 | * Initialize memory management within prom_init | |
2536 | */ | |
2537 | prom_init_mem(); | |
2538 | ||
2539 | /* | |
2540 | * Determine which cpu is actually running right _now_ | |
2541 | */ | |
2542 | prom_find_boot_cpu(); | |
2543 | ||
2544 | /* | |
2545 | * Initialize display devices | |
2546 | */ | |
2547 | prom_check_displays(); | |
2548 | ||
2549 | #ifdef CONFIG_PPC64 | |
2550 | /* | |
2551 | * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else | |
2552 | * that uses the allocator, we need to make sure we get the top of memory | |
2553 | * available for us here... | |
2554 | */ | |
2555 | if (RELOC(of_platform) == PLATFORM_PSERIES) | |
2556 | prom_initialize_tce_table(); | |
2557 | #endif | |
2558 | ||
2559 | /* | |
2560 | * On non-powermacs, try to instantiate RTAS and puts all CPUs | |
2561 | * in spin-loops. PowerMacs don't have a working RTAS and use | |
2562 | * a different way to spin CPUs | |
2563 | */ | |
2564 | if (RELOC(of_platform) != PLATFORM_POWERMAC) { | |
2565 | prom_instantiate_rtas(); | |
2566 | prom_hold_cpus(); | |
2567 | } | |
2568 | ||
2569 | /* | |
2570 | * Fill in some infos for use by the kernel later on | |
2571 | */ | |
cf68787b BK |
2572 | if (RELOC(prom_memory_limit)) |
2573 | prom_setprop(_prom->chosen, "/chosen", "linux,memory-limit", | |
2574 | &RELOC(prom_memory_limit), | |
2575 | sizeof(prom_memory_limit)); | |
9b6b563c | 2576 | #ifdef CONFIG_PPC64 |
165785e5 | 2577 | if (RELOC(prom_iommu_off)) |
a23414be PM |
2578 | prom_setprop(_prom->chosen, "/chosen", "linux,iommu-off", |
2579 | NULL, 0); | |
9b6b563c | 2580 | |
165785e5 | 2581 | if (RELOC(prom_iommu_force_on)) |
a23414be PM |
2582 | prom_setprop(_prom->chosen, "/chosen", "linux,iommu-force-on", |
2583 | NULL, 0); | |
9b6b563c PM |
2584 | |
2585 | if (RELOC(prom_tce_alloc_start)) { | |
a23414be | 2586 | prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-start", |
9b6b563c PM |
2587 | &RELOC(prom_tce_alloc_start), |
2588 | sizeof(prom_tce_alloc_start)); | |
a23414be | 2589 | prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-end", |
9b6b563c PM |
2590 | &RELOC(prom_tce_alloc_end), |
2591 | sizeof(prom_tce_alloc_end)); | |
2592 | } | |
2593 | #endif | |
2594 | ||
2595 | /* | |
2596 | * Fixup any known bugs in the device-tree | |
2597 | */ | |
2598 | fixup_device_tree(); | |
2599 | ||
2600 | /* | |
2601 | * Now finally create the flattened device-tree | |
2602 | */ | |
1f8737aa | 2603 | prom_printf("copying OF device tree...\n"); |
9b6b563c PM |
2604 | flatten_device_tree(); |
2605 | ||
3825ac0e PM |
2606 | /* |
2607 | * in case stdin is USB and still active on IBM machines... | |
2608 | * Unfortunately quiesce crashes on some powermacs if we have | |
2609 | * closed stdin already (in particular the powerbook 101). | |
2610 | */ | |
2611 | if (RELOC(of_platform) != PLATFORM_POWERMAC) | |
2612 | prom_close_stdin(); | |
9b6b563c PM |
2613 | |
2614 | /* | |
2615 | * Call OF "quiesce" method to shut down pending DMA's from | |
2616 | * devices etc... | |
2617 | */ | |
1f8737aa | 2618 | prom_printf("Calling quiesce...\n"); |
9b6b563c PM |
2619 | call_prom("quiesce", 0, 0); |
2620 | ||
2621 | /* | |
2622 | * And finally, call the kernel passing it the flattened device | |
2623 | * tree and NULL as r5, thus triggering the new entry point which | |
2624 | * is common to us and kexec | |
2625 | */ | |
2626 | hdr = RELOC(dt_header_start); | |
2627 | prom_printf("returning from prom_init\n"); | |
2628 | prom_debug("->dt_header_start=0x%x\n", hdr); | |
2629 | ||
2630 | #ifdef CONFIG_PPC32 | |
2631 | reloc_got2(-offset); | |
2632 | #endif | |
2633 | ||
549e8152 | 2634 | __start(hdr, kbase, 0); |
9b6b563c PM |
2635 | |
2636 | return 0; | |
2637 | } |