Commit | Line | Data |
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9b6b563c PM |
1 | /* |
2 | * Procedures for interfacing to Open Firmware. | |
3 | * | |
4 | * Paul Mackerras August 1996. | |
5 | * Copyright (C) 1996-2005 Paul Mackerras. | |
6 | * | |
7 | * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner. | |
8 | * {engebret|bergner}@us.ibm.com | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License | |
12 | * as published by the Free Software Foundation; either version | |
13 | * 2 of the License, or (at your option) any later version. | |
14 | */ | |
15 | ||
16 | #undef DEBUG_PROM | |
17 | ||
18 | #include <stdarg.h> | |
19 | #include <linux/config.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/string.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/threads.h> | |
24 | #include <linux/spinlock.h> | |
25 | #include <linux/types.h> | |
26 | #include <linux/pci.h> | |
27 | #include <linux/proc_fs.h> | |
28 | #include <linux/stringify.h> | |
29 | #include <linux/delay.h> | |
30 | #include <linux/initrd.h> | |
31 | #include <linux/bitops.h> | |
32 | #include <asm/prom.h> | |
33 | #include <asm/rtas.h> | |
34 | #include <asm/page.h> | |
35 | #include <asm/processor.h> | |
36 | #include <asm/irq.h> | |
37 | #include <asm/io.h> | |
38 | #include <asm/smp.h> | |
39 | #include <asm/system.h> | |
40 | #include <asm/mmu.h> | |
41 | #include <asm/pgtable.h> | |
42 | #include <asm/pci.h> | |
43 | #include <asm/iommu.h> | |
9b6b563c PM |
44 | #include <asm/btext.h> |
45 | #include <asm/sections.h> | |
46 | #include <asm/machdep.h> | |
47 | ||
48 | #ifdef CONFIG_LOGO_LINUX_CLUT224 | |
49 | #include <linux/linux_logo.h> | |
50 | extern const struct linux_logo logo_linux_clut224; | |
51 | #endif | |
52 | ||
53 | /* | |
54 | * Properties whose value is longer than this get excluded from our | |
55 | * copy of the device tree. This value does need to be big enough to | |
56 | * ensure that we don't lose things like the interrupt-map property | |
57 | * on a PCI-PCI bridge. | |
58 | */ | |
59 | #define MAX_PROPERTY_LENGTH (1UL * 1024 * 1024) | |
60 | ||
61 | /* | |
62 | * Eventually bump that one up | |
63 | */ | |
64 | #define DEVTREE_CHUNK_SIZE 0x100000 | |
65 | ||
66 | /* | |
67 | * This is the size of the local memory reserve map that gets copied | |
68 | * into the boot params passed to the kernel. That size is totally | |
69 | * flexible as the kernel just reads the list until it encounters an | |
70 | * entry with size 0, so it can be changed without breaking binary | |
71 | * compatibility | |
72 | */ | |
73 | #define MEM_RESERVE_MAP_SIZE 8 | |
74 | ||
75 | /* | |
76 | * prom_init() is called very early on, before the kernel text | |
77 | * and data have been mapped to KERNELBASE. At this point the code | |
78 | * is running at whatever address it has been loaded at. | |
79 | * On ppc32 we compile with -mrelocatable, which means that references | |
80 | * to extern and static variables get relocated automatically. | |
81 | * On ppc64 we have to relocate the references explicitly with | |
82 | * RELOC. (Note that strings count as static variables.) | |
83 | * | |
84 | * Because OF may have mapped I/O devices into the area starting at | |
85 | * KERNELBASE, particularly on CHRP machines, we can't safely call | |
86 | * OF once the kernel has been mapped to KERNELBASE. Therefore all | |
87 | * OF calls must be done within prom_init(). | |
88 | * | |
89 | * ADDR is used in calls to call_prom. The 4th and following | |
90 | * arguments to call_prom should be 32-bit values. | |
91 | * On ppc64, 64 bit values are truncated to 32 bits (and | |
92 | * fortunately don't get interpreted as two arguments). | |
93 | */ | |
94 | #ifdef CONFIG_PPC64 | |
95 | #define RELOC(x) (*PTRRELOC(&(x))) | |
96 | #define ADDR(x) (u32) add_reloc_offset((unsigned long)(x)) | |
a23414be | 97 | #define OF_WORKAROUNDS 0 |
9b6b563c PM |
98 | #else |
99 | #define RELOC(x) (x) | |
100 | #define ADDR(x) (u32) (x) | |
a23414be PM |
101 | #define OF_WORKAROUNDS of_workarounds |
102 | int of_workarounds; | |
9b6b563c PM |
103 | #endif |
104 | ||
a23414be PM |
105 | #define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */ |
106 | #define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */ | |
107 | ||
9b6b563c PM |
108 | #define PROM_BUG() do { \ |
109 | prom_printf("kernel BUG at %s line 0x%x!\n", \ | |
110 | RELOC(__FILE__), __LINE__); \ | |
111 | __asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \ | |
112 | } while (0) | |
113 | ||
114 | #ifdef DEBUG_PROM | |
115 | #define prom_debug(x...) prom_printf(x) | |
116 | #else | |
117 | #define prom_debug(x...) | |
118 | #endif | |
119 | ||
9b6b563c PM |
120 | |
121 | typedef u32 prom_arg_t; | |
122 | ||
123 | struct prom_args { | |
124 | u32 service; | |
125 | u32 nargs; | |
126 | u32 nret; | |
127 | prom_arg_t args[10]; | |
128 | }; | |
129 | ||
130 | struct prom_t { | |
131 | ihandle root; | |
a23414be | 132 | phandle chosen; |
9b6b563c PM |
133 | int cpu; |
134 | ihandle stdout; | |
a575b807 | 135 | ihandle mmumap; |
a23414be | 136 | ihandle memory; |
9b6b563c PM |
137 | }; |
138 | ||
139 | struct mem_map_entry { | |
cbbcf340 KG |
140 | u64 base; |
141 | u64 size; | |
9b6b563c PM |
142 | }; |
143 | ||
144 | typedef u32 cell_t; | |
145 | ||
146 | extern void __start(unsigned long r3, unsigned long r4, unsigned long r5); | |
147 | ||
148 | #ifdef CONFIG_PPC64 | |
c4988820 | 149 | extern int enter_prom(struct prom_args *args, unsigned long entry); |
9b6b563c | 150 | #else |
c4988820 | 151 | static inline int enter_prom(struct prom_args *args, unsigned long entry) |
9b6b563c | 152 | { |
c4988820 | 153 | return ((int (*)(struct prom_args *))entry)(args); |
9b6b563c PM |
154 | } |
155 | #endif | |
156 | ||
157 | extern void copy_and_flush(unsigned long dest, unsigned long src, | |
158 | unsigned long size, unsigned long offset); | |
159 | ||
160 | /* prom structure */ | |
161 | static struct prom_t __initdata prom; | |
162 | ||
163 | static unsigned long prom_entry __initdata; | |
164 | ||
165 | #define PROM_SCRATCH_SIZE 256 | |
166 | ||
167 | static char __initdata of_stdout_device[256]; | |
168 | static char __initdata prom_scratch[PROM_SCRATCH_SIZE]; | |
169 | ||
170 | static unsigned long __initdata dt_header_start; | |
171 | static unsigned long __initdata dt_struct_start, dt_struct_end; | |
172 | static unsigned long __initdata dt_string_start, dt_string_end; | |
173 | ||
174 | static unsigned long __initdata prom_initrd_start, prom_initrd_end; | |
175 | ||
176 | #ifdef CONFIG_PPC64 | |
177 | static int __initdata iommu_force_on; | |
178 | static int __initdata ppc64_iommu_off; | |
179 | static unsigned long __initdata prom_tce_alloc_start; | |
180 | static unsigned long __initdata prom_tce_alloc_end; | |
181 | #endif | |
182 | ||
e8222502 BH |
183 | /* Platforms codes are now obsolete in the kernel. Now only used within this |
184 | * file and ultimately gone too. Feel free to change them if you need, they | |
185 | * are not shared with anything outside of this file anymore | |
186 | */ | |
187 | #define PLATFORM_PSERIES 0x0100 | |
188 | #define PLATFORM_PSERIES_LPAR 0x0101 | |
189 | #define PLATFORM_LPAR 0x0001 | |
190 | #define PLATFORM_POWERMAC 0x0400 | |
191 | #define PLATFORM_GENERIC 0x0500 | |
192 | ||
9b6b563c PM |
193 | static int __initdata of_platform; |
194 | ||
195 | static char __initdata prom_cmd_line[COMMAND_LINE_SIZE]; | |
196 | ||
197 | static unsigned long __initdata prom_memory_limit; | |
198 | ||
199 | static unsigned long __initdata alloc_top; | |
200 | static unsigned long __initdata alloc_top_high; | |
201 | static unsigned long __initdata alloc_bottom; | |
202 | static unsigned long __initdata rmo_top; | |
203 | static unsigned long __initdata ram_top; | |
204 | ||
dcee3036 ME |
205 | #ifdef CONFIG_KEXEC |
206 | static unsigned long __initdata prom_crashk_base; | |
207 | static unsigned long __initdata prom_crashk_size; | |
208 | #endif | |
209 | ||
9b6b563c PM |
210 | static struct mem_map_entry __initdata mem_reserve_map[MEM_RESERVE_MAP_SIZE]; |
211 | static int __initdata mem_reserve_cnt; | |
212 | ||
213 | static cell_t __initdata regbuf[1024]; | |
214 | ||
215 | ||
216 | #define MAX_CPU_THREADS 2 | |
217 | ||
9b6b563c PM |
218 | /* |
219 | * Error results ... some OF calls will return "-1" on error, some | |
220 | * will return 0, some will return either. To simplify, here are | |
221 | * macros to use with any ihandle or phandle return value to check if | |
222 | * it is valid | |
223 | */ | |
224 | ||
225 | #define PROM_ERROR (-1u) | |
226 | #define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR) | |
227 | #define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR) | |
228 | ||
229 | ||
230 | /* This is the one and *ONLY* place where we actually call open | |
231 | * firmware. | |
232 | */ | |
233 | ||
234 | static int __init call_prom(const char *service, int nargs, int nret, ...) | |
235 | { | |
236 | int i; | |
237 | struct prom_args args; | |
238 | va_list list; | |
239 | ||
240 | args.service = ADDR(service); | |
241 | args.nargs = nargs; | |
242 | args.nret = nret; | |
243 | ||
244 | va_start(list, nret); | |
245 | for (i = 0; i < nargs; i++) | |
246 | args.args[i] = va_arg(list, prom_arg_t); | |
247 | va_end(list); | |
248 | ||
249 | for (i = 0; i < nret; i++) | |
250 | args.args[nargs+i] = 0; | |
251 | ||
c4988820 PM |
252 | if (enter_prom(&args, RELOC(prom_entry)) < 0) |
253 | return PROM_ERROR; | |
9b6b563c PM |
254 | |
255 | return (nret > 0) ? args.args[nargs] : 0; | |
256 | } | |
257 | ||
258 | static int __init call_prom_ret(const char *service, int nargs, int nret, | |
259 | prom_arg_t *rets, ...) | |
260 | { | |
261 | int i; | |
262 | struct prom_args args; | |
263 | va_list list; | |
264 | ||
265 | args.service = ADDR(service); | |
266 | args.nargs = nargs; | |
267 | args.nret = nret; | |
268 | ||
269 | va_start(list, rets); | |
270 | for (i = 0; i < nargs; i++) | |
271 | args.args[i] = va_arg(list, prom_arg_t); | |
272 | va_end(list); | |
273 | ||
274 | for (i = 0; i < nret; i++) | |
ed1189b7 | 275 | args.args[nargs+i] = 0; |
9b6b563c | 276 | |
c4988820 PM |
277 | if (enter_prom(&args, RELOC(prom_entry)) < 0) |
278 | return PROM_ERROR; | |
9b6b563c PM |
279 | |
280 | if (rets != NULL) | |
281 | for (i = 1; i < nret; ++i) | |
c5200c90 | 282 | rets[i-1] = args.args[nargs+i]; |
9b6b563c PM |
283 | |
284 | return (nret > 0) ? args.args[nargs] : 0; | |
285 | } | |
286 | ||
287 | ||
9b6b563c PM |
288 | static void __init prom_print(const char *msg) |
289 | { | |
290 | const char *p, *q; | |
291 | struct prom_t *_prom = &RELOC(prom); | |
292 | ||
293 | if (_prom->stdout == 0) | |
294 | return; | |
295 | ||
296 | for (p = msg; *p != 0; p = q) { | |
297 | for (q = p; *q != 0 && *q != '\n'; ++q) | |
298 | ; | |
299 | if (q > p) | |
300 | call_prom("write", 3, 1, _prom->stdout, p, q - p); | |
301 | if (*q == 0) | |
302 | break; | |
303 | ++q; | |
304 | call_prom("write", 3, 1, _prom->stdout, ADDR("\r\n"), 2); | |
305 | } | |
306 | } | |
307 | ||
308 | ||
309 | static void __init prom_print_hex(unsigned long val) | |
310 | { | |
311 | int i, nibbles = sizeof(val)*2; | |
312 | char buf[sizeof(val)*2+1]; | |
313 | struct prom_t *_prom = &RELOC(prom); | |
314 | ||
315 | for (i = nibbles-1; i >= 0; i--) { | |
316 | buf[i] = (val & 0xf) + '0'; | |
317 | if (buf[i] > '9') | |
318 | buf[i] += ('a'-'0'-10); | |
319 | val >>= 4; | |
320 | } | |
321 | buf[nibbles] = '\0'; | |
322 | call_prom("write", 3, 1, _prom->stdout, buf, nibbles); | |
323 | } | |
324 | ||
325 | ||
326 | static void __init prom_printf(const char *format, ...) | |
327 | { | |
328 | const char *p, *q, *s; | |
329 | va_list args; | |
330 | unsigned long v; | |
331 | struct prom_t *_prom = &RELOC(prom); | |
332 | ||
333 | va_start(args, format); | |
334 | #ifdef CONFIG_PPC64 | |
335 | format = PTRRELOC(format); | |
336 | #endif | |
337 | for (p = format; *p != 0; p = q) { | |
338 | for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q) | |
339 | ; | |
340 | if (q > p) | |
341 | call_prom("write", 3, 1, _prom->stdout, p, q - p); | |
342 | if (*q == 0) | |
343 | break; | |
344 | if (*q == '\n') { | |
345 | ++q; | |
346 | call_prom("write", 3, 1, _prom->stdout, | |
347 | ADDR("\r\n"), 2); | |
348 | continue; | |
349 | } | |
350 | ++q; | |
351 | if (*q == 0) | |
352 | break; | |
353 | switch (*q) { | |
354 | case 's': | |
355 | ++q; | |
356 | s = va_arg(args, const char *); | |
357 | prom_print(s); | |
358 | break; | |
359 | case 'x': | |
360 | ++q; | |
361 | v = va_arg(args, unsigned long); | |
362 | prom_print_hex(v); | |
363 | break; | |
364 | } | |
365 | } | |
366 | } | |
367 | ||
368 | ||
a575b807 PM |
369 | static unsigned int __init prom_claim(unsigned long virt, unsigned long size, |
370 | unsigned long align) | |
371 | { | |
a575b807 PM |
372 | struct prom_t *_prom = &RELOC(prom); |
373 | ||
a23414be PM |
374 | if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) { |
375 | /* | |
376 | * Old OF requires we claim physical and virtual separately | |
377 | * and then map explicitly (assuming virtual mode) | |
378 | */ | |
379 | int ret; | |
380 | prom_arg_t result; | |
381 | ||
382 | ret = call_prom_ret("call-method", 5, 2, &result, | |
383 | ADDR("claim"), _prom->memory, | |
384 | align, size, virt); | |
385 | if (ret != 0 || result == -1) | |
386 | return -1; | |
387 | ret = call_prom_ret("call-method", 5, 2, &result, | |
388 | ADDR("claim"), _prom->mmumap, | |
389 | align, size, virt); | |
390 | if (ret != 0) { | |
391 | call_prom("call-method", 4, 1, ADDR("release"), | |
392 | _prom->memory, size, virt); | |
393 | return -1; | |
394 | } | |
395 | /* the 0x12 is M (coherence) + PP == read/write */ | |
a575b807 | 396 | call_prom("call-method", 6, 1, |
a23414be PM |
397 | ADDR("map"), _prom->mmumap, 0x12, size, virt, virt); |
398 | return virt; | |
399 | } | |
400 | return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size, | |
401 | (prom_arg_t)align); | |
a575b807 PM |
402 | } |
403 | ||
9b6b563c PM |
404 | static void __init __attribute__((noreturn)) prom_panic(const char *reason) |
405 | { | |
406 | #ifdef CONFIG_PPC64 | |
407 | reason = PTRRELOC(reason); | |
408 | #endif | |
409 | prom_print(reason); | |
add60ef3 OH |
410 | /* Do not call exit because it clears the screen on pmac |
411 | * it also causes some sort of double-fault on early pmacs */ | |
412 | if (RELOC(of_platform) == PLATFORM_POWERMAC) | |
413 | asm("trap\n"); | |
414 | ||
9b6b563c PM |
415 | /* ToDo: should put up an SRC here on p/iSeries */ |
416 | call_prom("exit", 0, 0); | |
417 | ||
418 | for (;;) /* should never get here */ | |
419 | ; | |
420 | } | |
421 | ||
422 | ||
423 | static int __init prom_next_node(phandle *nodep) | |
424 | { | |
425 | phandle node; | |
426 | ||
427 | if ((node = *nodep) != 0 | |
428 | && (*nodep = call_prom("child", 1, 1, node)) != 0) | |
429 | return 1; | |
430 | if ((*nodep = call_prom("peer", 1, 1, node)) != 0) | |
431 | return 1; | |
432 | for (;;) { | |
433 | if ((node = call_prom("parent", 1, 1, node)) == 0) | |
434 | return 0; | |
435 | if ((*nodep = call_prom("peer", 1, 1, node)) != 0) | |
436 | return 1; | |
437 | } | |
438 | } | |
439 | ||
21fe3301 | 440 | static int inline prom_getprop(phandle node, const char *pname, |
9b6b563c PM |
441 | void *value, size_t valuelen) |
442 | { | |
443 | return call_prom("getprop", 4, 1, node, ADDR(pname), | |
444 | (u32)(unsigned long) value, (u32) valuelen); | |
445 | } | |
446 | ||
21fe3301 | 447 | static int inline prom_getproplen(phandle node, const char *pname) |
9b6b563c PM |
448 | { |
449 | return call_prom("getproplen", 2, 1, node, ADDR(pname)); | |
450 | } | |
451 | ||
a23414be | 452 | static void add_string(char **str, const char *q) |
9b6b563c | 453 | { |
a23414be PM |
454 | char *p = *str; |
455 | ||
456 | while (*q) | |
457 | *p++ = *q++; | |
458 | *p++ = ' '; | |
459 | *str = p; | |
460 | } | |
461 | ||
462 | static char *tohex(unsigned int x) | |
463 | { | |
464 | static char digits[] = "0123456789abcdef"; | |
465 | static char result[9]; | |
466 | int i; | |
467 | ||
468 | result[8] = 0; | |
469 | i = 8; | |
470 | do { | |
471 | --i; | |
472 | result[i] = digits[x & 0xf]; | |
473 | x >>= 4; | |
474 | } while (x != 0 && i > 0); | |
475 | return &result[i]; | |
476 | } | |
477 | ||
478 | static int __init prom_setprop(phandle node, const char *nodename, | |
479 | const char *pname, void *value, size_t valuelen) | |
480 | { | |
481 | char cmd[256], *p; | |
482 | ||
483 | if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL)) | |
484 | return call_prom("setprop", 4, 1, node, ADDR(pname), | |
485 | (u32)(unsigned long) value, (u32) valuelen); | |
486 | ||
487 | /* gah... setprop doesn't work on longtrail, have to use interpret */ | |
488 | p = cmd; | |
489 | add_string(&p, "dev"); | |
490 | add_string(&p, nodename); | |
491 | add_string(&p, tohex((u32)(unsigned long) value)); | |
492 | add_string(&p, tohex(valuelen)); | |
493 | add_string(&p, tohex(ADDR(pname))); | |
494 | add_string(&p, tohex(strlen(RELOC(pname)))); | |
495 | add_string(&p, "property"); | |
496 | *p = 0; | |
497 | return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd); | |
9b6b563c PM |
498 | } |
499 | ||
500 | /* We can't use the standard versions because of RELOC headaches. */ | |
501 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ | |
502 | || ('a' <= (c) && (c) <= 'f') \ | |
503 | || ('A' <= (c) && (c) <= 'F')) | |
504 | ||
505 | #define isdigit(c) ('0' <= (c) && (c) <= '9') | |
506 | #define islower(c) ('a' <= (c) && (c) <= 'z') | |
507 | #define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c)) | |
508 | ||
509 | unsigned long prom_strtoul(const char *cp, const char **endp) | |
510 | { | |
511 | unsigned long result = 0, base = 10, value; | |
512 | ||
513 | if (*cp == '0') { | |
514 | base = 8; | |
515 | cp++; | |
516 | if (toupper(*cp) == 'X') { | |
517 | cp++; | |
518 | base = 16; | |
519 | } | |
520 | } | |
521 | ||
522 | while (isxdigit(*cp) && | |
523 | (value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) { | |
524 | result = result * base + value; | |
525 | cp++; | |
526 | } | |
527 | ||
528 | if (endp) | |
529 | *endp = cp; | |
530 | ||
531 | return result; | |
532 | } | |
533 | ||
534 | unsigned long prom_memparse(const char *ptr, const char **retptr) | |
535 | { | |
536 | unsigned long ret = prom_strtoul(ptr, retptr); | |
537 | int shift = 0; | |
538 | ||
539 | /* | |
540 | * We can't use a switch here because GCC *may* generate a | |
541 | * jump table which won't work, because we're not running at | |
542 | * the address we're linked at. | |
543 | */ | |
544 | if ('G' == **retptr || 'g' == **retptr) | |
545 | shift = 30; | |
546 | ||
547 | if ('M' == **retptr || 'm' == **retptr) | |
548 | shift = 20; | |
549 | ||
550 | if ('K' == **retptr || 'k' == **retptr) | |
551 | shift = 10; | |
552 | ||
553 | if (shift) { | |
554 | ret <<= shift; | |
555 | (*retptr)++; | |
556 | } | |
557 | ||
558 | return ret; | |
559 | } | |
560 | ||
561 | /* | |
562 | * Early parsing of the command line passed to the kernel, used for | |
563 | * "mem=x" and the options that affect the iommu | |
564 | */ | |
565 | static void __init early_cmdline_parse(void) | |
566 | { | |
567 | struct prom_t *_prom = &RELOC(prom); | |
cc5d0189 BH |
568 | const char *opt; |
569 | char *p; | |
9b6b563c PM |
570 | int l = 0; |
571 | ||
572 | RELOC(prom_cmd_line[0]) = 0; | |
573 | p = RELOC(prom_cmd_line); | |
574 | if ((long)_prom->chosen > 0) | |
575 | l = prom_getprop(_prom->chosen, "bootargs", p, COMMAND_LINE_SIZE-1); | |
576 | #ifdef CONFIG_CMDLINE | |
577 | if (l == 0) /* dbl check */ | |
578 | strlcpy(RELOC(prom_cmd_line), | |
579 | RELOC(CONFIG_CMDLINE), sizeof(prom_cmd_line)); | |
580 | #endif /* CONFIG_CMDLINE */ | |
581 | prom_printf("command line: %s\n", RELOC(prom_cmd_line)); | |
582 | ||
583 | #ifdef CONFIG_PPC64 | |
584 | opt = strstr(RELOC(prom_cmd_line), RELOC("iommu=")); | |
585 | if (opt) { | |
586 | prom_printf("iommu opt is: %s\n", opt); | |
587 | opt += 6; | |
588 | while (*opt && *opt == ' ') | |
589 | opt++; | |
590 | if (!strncmp(opt, RELOC("off"), 3)) | |
591 | RELOC(ppc64_iommu_off) = 1; | |
592 | else if (!strncmp(opt, RELOC("force"), 5)) | |
593 | RELOC(iommu_force_on) = 1; | |
594 | } | |
595 | #endif | |
596 | ||
597 | opt = strstr(RELOC(prom_cmd_line), RELOC("mem=")); | |
598 | if (opt) { | |
599 | opt += 4; | |
600 | RELOC(prom_memory_limit) = prom_memparse(opt, (const char **)&opt); | |
601 | #ifdef CONFIG_PPC64 | |
602 | /* Align to 16 MB == size of ppc64 large page */ | |
603 | RELOC(prom_memory_limit) = ALIGN(RELOC(prom_memory_limit), 0x1000000); | |
604 | #endif | |
605 | } | |
dcee3036 ME |
606 | |
607 | #ifdef CONFIG_KEXEC | |
608 | /* | |
609 | * crashkernel=size@addr specifies the location to reserve for | |
610 | * crash kernel. | |
611 | */ | |
612 | opt = strstr(RELOC(prom_cmd_line), RELOC("crashkernel=")); | |
613 | if (opt) { | |
614 | opt += 12; | |
8385a6a3 HM |
615 | RELOC(prom_crashk_size) = |
616 | prom_memparse(opt, (const char **)&opt); | |
dcee3036 ME |
617 | |
618 | if (ALIGN(RELOC(prom_crashk_size), 0x1000000) != | |
619 | RELOC(prom_crashk_size)) { | |
620 | prom_printf("Warning: crashkernel size is not " | |
621 | "aligned to 16MB\n"); | |
622 | } | |
623 | ||
624 | /* | |
625 | * At present, the crash kernel always run at 32MB. | |
626 | * Just ignore whatever user passed. | |
627 | */ | |
628 | RELOC(prom_crashk_base) = 0x2000000; | |
629 | if (*opt == '@') { | |
630 | prom_printf("Warning: PPC64 kdump kernel always runs " | |
631 | "at 32 MB\n"); | |
632 | } | |
633 | } | |
634 | #endif | |
9b6b563c PM |
635 | } |
636 | ||
637 | #ifdef CONFIG_PPC_PSERIES | |
638 | /* | |
639 | * To tell the firmware what our capabilities are, we have to pass | |
640 | * it a fake 32-bit ELF header containing a couple of PT_NOTE sections | |
641 | * that contain structures that contain the actual values. | |
642 | */ | |
643 | static struct fake_elf { | |
644 | Elf32_Ehdr elfhdr; | |
645 | Elf32_Phdr phdr[2]; | |
646 | struct chrpnote { | |
647 | u32 namesz; | |
648 | u32 descsz; | |
649 | u32 type; | |
650 | char name[8]; /* "PowerPC" */ | |
651 | struct chrpdesc { | |
652 | u32 real_mode; | |
653 | u32 real_base; | |
654 | u32 real_size; | |
655 | u32 virt_base; | |
656 | u32 virt_size; | |
657 | u32 load_base; | |
658 | } chrpdesc; | |
659 | } chrpnote; | |
660 | struct rpanote { | |
661 | u32 namesz; | |
662 | u32 descsz; | |
663 | u32 type; | |
664 | char name[24]; /* "IBM,RPA-Client-Config" */ | |
665 | struct rpadesc { | |
666 | u32 lpar_affinity; | |
667 | u32 min_rmo_size; | |
668 | u32 min_rmo_percent; | |
669 | u32 max_pft_size; | |
670 | u32 splpar; | |
671 | u32 min_load; | |
672 | u32 new_mem_def; | |
673 | u32 ignore_me; | |
674 | } rpadesc; | |
675 | } rpanote; | |
676 | } fake_elf = { | |
677 | .elfhdr = { | |
678 | .e_ident = { 0x7f, 'E', 'L', 'F', | |
679 | ELFCLASS32, ELFDATA2MSB, EV_CURRENT }, | |
680 | .e_type = ET_EXEC, /* yeah right */ | |
681 | .e_machine = EM_PPC, | |
682 | .e_version = EV_CURRENT, | |
683 | .e_phoff = offsetof(struct fake_elf, phdr), | |
684 | .e_phentsize = sizeof(Elf32_Phdr), | |
685 | .e_phnum = 2 | |
686 | }, | |
687 | .phdr = { | |
688 | [0] = { | |
689 | .p_type = PT_NOTE, | |
690 | .p_offset = offsetof(struct fake_elf, chrpnote), | |
691 | .p_filesz = sizeof(struct chrpnote) | |
692 | }, [1] = { | |
693 | .p_type = PT_NOTE, | |
694 | .p_offset = offsetof(struct fake_elf, rpanote), | |
695 | .p_filesz = sizeof(struct rpanote) | |
696 | } | |
697 | }, | |
698 | .chrpnote = { | |
699 | .namesz = sizeof("PowerPC"), | |
700 | .descsz = sizeof(struct chrpdesc), | |
701 | .type = 0x1275, | |
702 | .name = "PowerPC", | |
703 | .chrpdesc = { | |
704 | .real_mode = ~0U, /* ~0 means "don't care" */ | |
705 | .real_base = ~0U, | |
706 | .real_size = ~0U, | |
707 | .virt_base = ~0U, | |
708 | .virt_size = ~0U, | |
709 | .load_base = ~0U | |
710 | }, | |
711 | }, | |
712 | .rpanote = { | |
713 | .namesz = sizeof("IBM,RPA-Client-Config"), | |
714 | .descsz = sizeof(struct rpadesc), | |
715 | .type = 0x12759999, | |
716 | .name = "IBM,RPA-Client-Config", | |
717 | .rpadesc = { | |
718 | .lpar_affinity = 0, | |
719 | .min_rmo_size = 64, /* in megabytes */ | |
720 | .min_rmo_percent = 0, | |
721 | .max_pft_size = 48, /* 2^48 bytes max PFT size */ | |
722 | .splpar = 1, | |
723 | .min_load = ~0U, | |
724 | .new_mem_def = 0 | |
725 | } | |
726 | } | |
727 | }; | |
728 | ||
729 | static void __init prom_send_capabilities(void) | |
730 | { | |
731 | ihandle elfloader; | |
732 | ||
733 | elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader")); | |
734 | if (elfloader == 0) { | |
735 | prom_printf("couldn't open /packages/elf-loader\n"); | |
736 | return; | |
737 | } | |
738 | call_prom("call-method", 3, 1, ADDR("process-elf-header"), | |
739 | elfloader, ADDR(&fake_elf)); | |
740 | call_prom("close", 1, 0, elfloader); | |
741 | } | |
742 | #endif | |
743 | ||
744 | /* | |
745 | * Memory allocation strategy... our layout is normally: | |
746 | * | |
747 | * at 14Mb or more we have vmlinux, then a gap and initrd. In some | |
748 | * rare cases, initrd might end up being before the kernel though. | |
749 | * We assume this won't override the final kernel at 0, we have no | |
750 | * provision to handle that in this version, but it should hopefully | |
751 | * never happen. | |
752 | * | |
753 | * alloc_top is set to the top of RMO, eventually shrink down if the | |
754 | * TCEs overlap | |
755 | * | |
756 | * alloc_bottom is set to the top of kernel/initrd | |
757 | * | |
758 | * from there, allocations are done this way : rtas is allocated | |
759 | * topmost, and the device-tree is allocated from the bottom. We try | |
760 | * to grow the device-tree allocation as we progress. If we can't, | |
761 | * then we fail, we don't currently have a facility to restart | |
762 | * elsewhere, but that shouldn't be necessary. | |
763 | * | |
764 | * Note that calls to reserve_mem have to be done explicitly, memory | |
765 | * allocated with either alloc_up or alloc_down isn't automatically | |
766 | * reserved. | |
767 | */ | |
768 | ||
769 | ||
770 | /* | |
771 | * Allocates memory in the RMO upward from the kernel/initrd | |
772 | * | |
773 | * When align is 0, this is a special case, it means to allocate in place | |
774 | * at the current location of alloc_bottom or fail (that is basically | |
775 | * extending the previous allocation). Used for the device-tree flattening | |
776 | */ | |
777 | static unsigned long __init alloc_up(unsigned long size, unsigned long align) | |
778 | { | |
c4988820 | 779 | unsigned long base = RELOC(alloc_bottom); |
9b6b563c PM |
780 | unsigned long addr = 0; |
781 | ||
c4988820 PM |
782 | if (align) |
783 | base = _ALIGN_UP(base, align); | |
9b6b563c PM |
784 | prom_debug("alloc_up(%x, %x)\n", size, align); |
785 | if (RELOC(ram_top) == 0) | |
786 | prom_panic("alloc_up() called with mem not initialized\n"); | |
787 | ||
788 | if (align) | |
789 | base = _ALIGN_UP(RELOC(alloc_bottom), align); | |
790 | else | |
791 | base = RELOC(alloc_bottom); | |
792 | ||
793 | for(; (base + size) <= RELOC(alloc_top); | |
794 | base = _ALIGN_UP(base + 0x100000, align)) { | |
795 | prom_debug(" trying: 0x%x\n\r", base); | |
796 | addr = (unsigned long)prom_claim(base, size, 0); | |
c4988820 | 797 | if (addr != PROM_ERROR && addr != 0) |
9b6b563c PM |
798 | break; |
799 | addr = 0; | |
800 | if (align == 0) | |
801 | break; | |
802 | } | |
803 | if (addr == 0) | |
804 | return 0; | |
805 | RELOC(alloc_bottom) = addr; | |
806 | ||
807 | prom_debug(" -> %x\n", addr); | |
808 | prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom)); | |
809 | prom_debug(" alloc_top : %x\n", RELOC(alloc_top)); | |
810 | prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); | |
811 | prom_debug(" rmo_top : %x\n", RELOC(rmo_top)); | |
812 | prom_debug(" ram_top : %x\n", RELOC(ram_top)); | |
813 | ||
814 | return addr; | |
815 | } | |
816 | ||
817 | /* | |
818 | * Allocates memory downward, either from top of RMO, or if highmem | |
819 | * is set, from the top of RAM. Note that this one doesn't handle | |
820 | * failures. It does claim memory if highmem is not set. | |
821 | */ | |
822 | static unsigned long __init alloc_down(unsigned long size, unsigned long align, | |
823 | int highmem) | |
824 | { | |
825 | unsigned long base, addr = 0; | |
826 | ||
827 | prom_debug("alloc_down(%x, %x, %s)\n", size, align, | |
828 | highmem ? RELOC("(high)") : RELOC("(low)")); | |
829 | if (RELOC(ram_top) == 0) | |
830 | prom_panic("alloc_down() called with mem not initialized\n"); | |
831 | ||
832 | if (highmem) { | |
833 | /* Carve out storage for the TCE table. */ | |
834 | addr = _ALIGN_DOWN(RELOC(alloc_top_high) - size, align); | |
835 | if (addr <= RELOC(alloc_bottom)) | |
836 | return 0; | |
837 | /* Will we bump into the RMO ? If yes, check out that we | |
838 | * didn't overlap existing allocations there, if we did, | |
839 | * we are dead, we must be the first in town ! | |
840 | */ | |
841 | if (addr < RELOC(rmo_top)) { | |
842 | /* Good, we are first */ | |
843 | if (RELOC(alloc_top) == RELOC(rmo_top)) | |
844 | RELOC(alloc_top) = RELOC(rmo_top) = addr; | |
845 | else | |
846 | return 0; | |
847 | } | |
848 | RELOC(alloc_top_high) = addr; | |
849 | goto bail; | |
850 | } | |
851 | ||
852 | base = _ALIGN_DOWN(RELOC(alloc_top) - size, align); | |
853 | for (; base > RELOC(alloc_bottom); | |
854 | base = _ALIGN_DOWN(base - 0x100000, align)) { | |
855 | prom_debug(" trying: 0x%x\n\r", base); | |
856 | addr = (unsigned long)prom_claim(base, size, 0); | |
c4988820 | 857 | if (addr != PROM_ERROR && addr != 0) |
9b6b563c PM |
858 | break; |
859 | addr = 0; | |
860 | } | |
861 | if (addr == 0) | |
862 | return 0; | |
863 | RELOC(alloc_top) = addr; | |
864 | ||
865 | bail: | |
866 | prom_debug(" -> %x\n", addr); | |
867 | prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom)); | |
868 | prom_debug(" alloc_top : %x\n", RELOC(alloc_top)); | |
869 | prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); | |
870 | prom_debug(" rmo_top : %x\n", RELOC(rmo_top)); | |
871 | prom_debug(" ram_top : %x\n", RELOC(ram_top)); | |
872 | ||
873 | return addr; | |
874 | } | |
875 | ||
876 | /* | |
877 | * Parse a "reg" cell | |
878 | */ | |
879 | static unsigned long __init prom_next_cell(int s, cell_t **cellp) | |
880 | { | |
881 | cell_t *p = *cellp; | |
882 | unsigned long r = 0; | |
883 | ||
884 | /* Ignore more than 2 cells */ | |
885 | while (s > sizeof(unsigned long) / 4) { | |
886 | p++; | |
887 | s--; | |
888 | } | |
889 | r = *p++; | |
890 | #ifdef CONFIG_PPC64 | |
35499c01 | 891 | if (s > 1) { |
9b6b563c PM |
892 | r <<= 32; |
893 | r |= *(p++); | |
894 | } | |
895 | #endif | |
896 | *cellp = p; | |
897 | return r; | |
898 | } | |
899 | ||
900 | /* | |
901 | * Very dumb function for adding to the memory reserve list, but | |
902 | * we don't need anything smarter at this point | |
903 | * | |
904 | * XXX Eventually check for collisions. They should NEVER happen. | |
905 | * If problems seem to show up, it would be a good start to track | |
906 | * them down. | |
907 | */ | |
cbbcf340 | 908 | static void reserve_mem(u64 base, u64 size) |
9b6b563c | 909 | { |
cbbcf340 | 910 | u64 top = base + size; |
9b6b563c PM |
911 | unsigned long cnt = RELOC(mem_reserve_cnt); |
912 | ||
913 | if (size == 0) | |
914 | return; | |
915 | ||
916 | /* We need to always keep one empty entry so that we | |
917 | * have our terminator with "size" set to 0 since we are | |
918 | * dumb and just copy this entire array to the boot params | |
919 | */ | |
920 | base = _ALIGN_DOWN(base, PAGE_SIZE); | |
921 | top = _ALIGN_UP(top, PAGE_SIZE); | |
922 | size = top - base; | |
923 | ||
924 | if (cnt >= (MEM_RESERVE_MAP_SIZE - 1)) | |
925 | prom_panic("Memory reserve map exhausted !\n"); | |
926 | RELOC(mem_reserve_map)[cnt].base = base; | |
927 | RELOC(mem_reserve_map)[cnt].size = size; | |
928 | RELOC(mem_reserve_cnt) = cnt + 1; | |
929 | } | |
930 | ||
931 | /* | |
932 | * Initialize memory allocation mecanism, parse "memory" nodes and | |
933 | * obtain that way the top of memory and RMO to setup out local allocator | |
934 | */ | |
935 | static void __init prom_init_mem(void) | |
936 | { | |
937 | phandle node; | |
938 | char *path, type[64]; | |
939 | unsigned int plen; | |
940 | cell_t *p, *endp; | |
941 | struct prom_t *_prom = &RELOC(prom); | |
942 | u32 rac, rsc; | |
943 | ||
944 | /* | |
945 | * We iterate the memory nodes to find | |
946 | * 1) top of RMO (first node) | |
947 | * 2) top of memory | |
948 | */ | |
949 | rac = 2; | |
950 | prom_getprop(_prom->root, "#address-cells", &rac, sizeof(rac)); | |
951 | rsc = 1; | |
952 | prom_getprop(_prom->root, "#size-cells", &rsc, sizeof(rsc)); | |
953 | prom_debug("root_addr_cells: %x\n", (unsigned long) rac); | |
954 | prom_debug("root_size_cells: %x\n", (unsigned long) rsc); | |
955 | ||
956 | prom_debug("scanning memory:\n"); | |
957 | path = RELOC(prom_scratch); | |
958 | ||
959 | for (node = 0; prom_next_node(&node); ) { | |
960 | type[0] = 0; | |
961 | prom_getprop(node, "device_type", type, sizeof(type)); | |
962 | ||
c4988820 PM |
963 | if (type[0] == 0) { |
964 | /* | |
965 | * CHRP Longtrail machines have no device_type | |
966 | * on the memory node, so check the name instead... | |
967 | */ | |
968 | prom_getprop(node, "name", type, sizeof(type)); | |
969 | } | |
9b6b563c PM |
970 | if (strcmp(type, RELOC("memory"))) |
971 | continue; | |
c4988820 | 972 | |
9b6b563c PM |
973 | plen = prom_getprop(node, "reg", RELOC(regbuf), sizeof(regbuf)); |
974 | if (plen > sizeof(regbuf)) { | |
975 | prom_printf("memory node too large for buffer !\n"); | |
976 | plen = sizeof(regbuf); | |
977 | } | |
978 | p = RELOC(regbuf); | |
979 | endp = p + (plen / sizeof(cell_t)); | |
980 | ||
981 | #ifdef DEBUG_PROM | |
982 | memset(path, 0, PROM_SCRATCH_SIZE); | |
983 | call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); | |
984 | prom_debug(" node %s :\n", path); | |
985 | #endif /* DEBUG_PROM */ | |
986 | ||
987 | while ((endp - p) >= (rac + rsc)) { | |
988 | unsigned long base, size; | |
989 | ||
990 | base = prom_next_cell(rac, &p); | |
991 | size = prom_next_cell(rsc, &p); | |
992 | ||
993 | if (size == 0) | |
994 | continue; | |
995 | prom_debug(" %x %x\n", base, size); | |
ab1b55e2 | 996 | if (base == 0 && (RELOC(of_platform) & PLATFORM_LPAR)) |
9b6b563c PM |
997 | RELOC(rmo_top) = size; |
998 | if ((base + size) > RELOC(ram_top)) | |
999 | RELOC(ram_top) = base + size; | |
1000 | } | |
1001 | } | |
1002 | ||
1003 | RELOC(alloc_bottom) = PAGE_ALIGN((unsigned long)&RELOC(_end) + 0x4000); | |
1004 | ||
1005 | /* Check if we have an initrd after the kernel, if we do move our bottom | |
1006 | * point to after it | |
1007 | */ | |
1008 | if (RELOC(prom_initrd_start)) { | |
1009 | if (RELOC(prom_initrd_end) > RELOC(alloc_bottom)) | |
1010 | RELOC(alloc_bottom) = PAGE_ALIGN(RELOC(prom_initrd_end)); | |
1011 | } | |
1012 | ||
1013 | /* | |
1014 | * If prom_memory_limit is set we reduce the upper limits *except* for | |
1015 | * alloc_top_high. This must be the real top of RAM so we can put | |
1016 | * TCE's up there. | |
1017 | */ | |
1018 | ||
1019 | RELOC(alloc_top_high) = RELOC(ram_top); | |
1020 | ||
1021 | if (RELOC(prom_memory_limit)) { | |
1022 | if (RELOC(prom_memory_limit) <= RELOC(alloc_bottom)) { | |
1023 | prom_printf("Ignoring mem=%x <= alloc_bottom.\n", | |
1024 | RELOC(prom_memory_limit)); | |
1025 | RELOC(prom_memory_limit) = 0; | |
1026 | } else if (RELOC(prom_memory_limit) >= RELOC(ram_top)) { | |
1027 | prom_printf("Ignoring mem=%x >= ram_top.\n", | |
1028 | RELOC(prom_memory_limit)); | |
1029 | RELOC(prom_memory_limit) = 0; | |
1030 | } else { | |
1031 | RELOC(ram_top) = RELOC(prom_memory_limit); | |
1032 | RELOC(rmo_top) = min(RELOC(rmo_top), RELOC(prom_memory_limit)); | |
1033 | } | |
1034 | } | |
1035 | ||
1036 | /* | |
1037 | * Setup our top alloc point, that is top of RMO or top of | |
1038 | * segment 0 when running non-LPAR. | |
1039 | * Some RS64 machines have buggy firmware where claims up at | |
1040 | * 1GB fail. Cap at 768MB as a workaround. | |
1041 | * Since 768MB is plenty of room, and we need to cap to something | |
1042 | * reasonable on 32-bit, cap at 768MB on all machines. | |
1043 | */ | |
1044 | if (!RELOC(rmo_top)) | |
1045 | RELOC(rmo_top) = RELOC(ram_top); | |
1046 | RELOC(rmo_top) = min(0x30000000ul, RELOC(rmo_top)); | |
1047 | RELOC(alloc_top) = RELOC(rmo_top); | |
1048 | ||
1049 | prom_printf("memory layout at init:\n"); | |
1050 | prom_printf(" memory_limit : %x (16 MB aligned)\n", RELOC(prom_memory_limit)); | |
1051 | prom_printf(" alloc_bottom : %x\n", RELOC(alloc_bottom)); | |
1052 | prom_printf(" alloc_top : %x\n", RELOC(alloc_top)); | |
1053 | prom_printf(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); | |
1054 | prom_printf(" rmo_top : %x\n", RELOC(rmo_top)); | |
1055 | prom_printf(" ram_top : %x\n", RELOC(ram_top)); | |
dcee3036 ME |
1056 | #ifdef CONFIG_KEXEC |
1057 | if (RELOC(prom_crashk_base)) { | |
1058 | prom_printf(" crashk_base : %x\n", RELOC(prom_crashk_base)); | |
1059 | prom_printf(" crashk_size : %x\n", RELOC(prom_crashk_size)); | |
1060 | } | |
1061 | #endif | |
9b6b563c PM |
1062 | } |
1063 | ||
1064 | ||
1065 | /* | |
1066 | * Allocate room for and instantiate RTAS | |
1067 | */ | |
1068 | static void __init prom_instantiate_rtas(void) | |
1069 | { | |
1070 | phandle rtas_node; | |
1071 | ihandle rtas_inst; | |
1072 | u32 base, entry = 0; | |
1073 | u32 size = 0; | |
1074 | ||
1075 | prom_debug("prom_instantiate_rtas: start...\n"); | |
1076 | ||
1077 | rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas")); | |
1078 | prom_debug("rtas_node: %x\n", rtas_node); | |
1079 | if (!PHANDLE_VALID(rtas_node)) | |
1080 | return; | |
1081 | ||
1082 | prom_getprop(rtas_node, "rtas-size", &size, sizeof(size)); | |
1083 | if (size == 0) | |
1084 | return; | |
1085 | ||
1086 | base = alloc_down(size, PAGE_SIZE, 0); | |
1087 | if (base == 0) { | |
1088 | prom_printf("RTAS allocation failed !\n"); | |
1089 | return; | |
1090 | } | |
1091 | ||
1092 | rtas_inst = call_prom("open", 1, 1, ADDR("/rtas")); | |
1093 | if (!IHANDLE_VALID(rtas_inst)) { | |
a23414be | 1094 | prom_printf("opening rtas package failed (%x)\n", rtas_inst); |
9b6b563c PM |
1095 | return; |
1096 | } | |
1097 | ||
1098 | prom_printf("instantiating rtas at 0x%x ...", base); | |
1099 | ||
1100 | if (call_prom_ret("call-method", 3, 2, &entry, | |
1101 | ADDR("instantiate-rtas"), | |
a23414be | 1102 | rtas_inst, base) != 0 |
9b6b563c PM |
1103 | || entry == 0) { |
1104 | prom_printf(" failed\n"); | |
1105 | return; | |
1106 | } | |
1107 | prom_printf(" done\n"); | |
1108 | ||
1109 | reserve_mem(base, size); | |
1110 | ||
a23414be PM |
1111 | prom_setprop(rtas_node, "/rtas", "linux,rtas-base", |
1112 | &base, sizeof(base)); | |
1113 | prom_setprop(rtas_node, "/rtas", "linux,rtas-entry", | |
1114 | &entry, sizeof(entry)); | |
9b6b563c PM |
1115 | |
1116 | prom_debug("rtas base = 0x%x\n", base); | |
1117 | prom_debug("rtas entry = 0x%x\n", entry); | |
1118 | prom_debug("rtas size = 0x%x\n", (long)size); | |
1119 | ||
1120 | prom_debug("prom_instantiate_rtas: end...\n"); | |
1121 | } | |
1122 | ||
1123 | #ifdef CONFIG_PPC64 | |
1124 | /* | |
1125 | * Allocate room for and initialize TCE tables | |
1126 | */ | |
1127 | static void __init prom_initialize_tce_table(void) | |
1128 | { | |
1129 | phandle node; | |
1130 | ihandle phb_node; | |
1131 | char compatible[64], type[64], model[64]; | |
1132 | char *path = RELOC(prom_scratch); | |
1133 | u64 base, align; | |
1134 | u32 minalign, minsize; | |
1135 | u64 tce_entry, *tce_entryp; | |
1136 | u64 local_alloc_top, local_alloc_bottom; | |
1137 | u64 i; | |
1138 | ||
1139 | if (RELOC(ppc64_iommu_off)) | |
1140 | return; | |
1141 | ||
1142 | prom_debug("starting prom_initialize_tce_table\n"); | |
1143 | ||
1144 | /* Cache current top of allocs so we reserve a single block */ | |
1145 | local_alloc_top = RELOC(alloc_top_high); | |
1146 | local_alloc_bottom = local_alloc_top; | |
1147 | ||
1148 | /* Search all nodes looking for PHBs. */ | |
1149 | for (node = 0; prom_next_node(&node); ) { | |
1150 | compatible[0] = 0; | |
1151 | type[0] = 0; | |
1152 | model[0] = 0; | |
1153 | prom_getprop(node, "compatible", | |
1154 | compatible, sizeof(compatible)); | |
1155 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1156 | prom_getprop(node, "model", model, sizeof(model)); | |
1157 | ||
1158 | if ((type[0] == 0) || (strstr(type, RELOC("pci")) == NULL)) | |
1159 | continue; | |
1160 | ||
1161 | /* Keep the old logic in tack to avoid regression. */ | |
1162 | if (compatible[0] != 0) { | |
1163 | if ((strstr(compatible, RELOC("python")) == NULL) && | |
1164 | (strstr(compatible, RELOC("Speedwagon")) == NULL) && | |
1165 | (strstr(compatible, RELOC("Winnipeg")) == NULL)) | |
1166 | continue; | |
1167 | } else if (model[0] != 0) { | |
1168 | if ((strstr(model, RELOC("ython")) == NULL) && | |
1169 | (strstr(model, RELOC("peedwagon")) == NULL) && | |
1170 | (strstr(model, RELOC("innipeg")) == NULL)) | |
1171 | continue; | |
1172 | } | |
1173 | ||
1174 | if (prom_getprop(node, "tce-table-minalign", &minalign, | |
1175 | sizeof(minalign)) == PROM_ERROR) | |
1176 | minalign = 0; | |
1177 | if (prom_getprop(node, "tce-table-minsize", &minsize, | |
1178 | sizeof(minsize)) == PROM_ERROR) | |
1179 | minsize = 4UL << 20; | |
1180 | ||
1181 | /* | |
1182 | * Even though we read what OF wants, we just set the table | |
1183 | * size to 4 MB. This is enough to map 2GB of PCI DMA space. | |
1184 | * By doing this, we avoid the pitfalls of trying to DMA to | |
1185 | * MMIO space and the DMA alias hole. | |
1186 | * | |
1187 | * On POWER4, firmware sets the TCE region by assuming | |
1188 | * each TCE table is 8MB. Using this memory for anything | |
1189 | * else will impact performance, so we always allocate 8MB. | |
1190 | * Anton | |
1191 | */ | |
1192 | if (__is_processor(PV_POWER4) || __is_processor(PV_POWER4p)) | |
1193 | minsize = 8UL << 20; | |
1194 | else | |
1195 | minsize = 4UL << 20; | |
1196 | ||
1197 | /* Align to the greater of the align or size */ | |
1198 | align = max(minalign, minsize); | |
1199 | base = alloc_down(minsize, align, 1); | |
1200 | if (base == 0) | |
1201 | prom_panic("ERROR, cannot find space for TCE table.\n"); | |
1202 | if (base < local_alloc_bottom) | |
1203 | local_alloc_bottom = base; | |
1204 | ||
9b6b563c PM |
1205 | /* It seems OF doesn't null-terminate the path :-( */ |
1206 | memset(path, 0, sizeof(path)); | |
1207 | /* Call OF to setup the TCE hardware */ | |
1208 | if (call_prom("package-to-path", 3, 1, node, | |
1209 | path, PROM_SCRATCH_SIZE-1) == PROM_ERROR) { | |
1210 | prom_printf("package-to-path failed\n"); | |
1211 | } | |
1212 | ||
a23414be PM |
1213 | /* Save away the TCE table attributes for later use. */ |
1214 | prom_setprop(node, path, "linux,tce-base", &base, sizeof(base)); | |
1215 | prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize)); | |
1216 | ||
9b6b563c PM |
1217 | prom_debug("TCE table: %s\n", path); |
1218 | prom_debug("\tnode = 0x%x\n", node); | |
1219 | prom_debug("\tbase = 0x%x\n", base); | |
1220 | prom_debug("\tsize = 0x%x\n", minsize); | |
1221 | ||
1222 | /* Initialize the table to have a one-to-one mapping | |
1223 | * over the allocated size. | |
1224 | */ | |
1225 | tce_entryp = (unsigned long *)base; | |
1226 | for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) { | |
1227 | tce_entry = (i << PAGE_SHIFT); | |
1228 | tce_entry |= 0x3; | |
1229 | *tce_entryp = tce_entry; | |
1230 | } | |
1231 | ||
1232 | prom_printf("opening PHB %s", path); | |
1233 | phb_node = call_prom("open", 1, 1, path); | |
1234 | if (phb_node == 0) | |
1235 | prom_printf("... failed\n"); | |
1236 | else | |
1237 | prom_printf("... done\n"); | |
1238 | ||
1239 | call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"), | |
1240 | phb_node, -1, minsize, | |
1241 | (u32) base, (u32) (base >> 32)); | |
1242 | call_prom("close", 1, 0, phb_node); | |
1243 | } | |
1244 | ||
1245 | reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom); | |
1246 | ||
1247 | if (RELOC(prom_memory_limit)) { | |
1248 | /* | |
1249 | * We align the start to a 16MB boundary so we can map | |
1250 | * the TCE area using large pages if possible. | |
1251 | * The end should be the top of RAM so no need to align it. | |
1252 | */ | |
1253 | RELOC(prom_tce_alloc_start) = _ALIGN_DOWN(local_alloc_bottom, | |
1254 | 0x1000000); | |
1255 | RELOC(prom_tce_alloc_end) = local_alloc_top; | |
1256 | } | |
1257 | ||
1258 | /* Flag the first invalid entry */ | |
1259 | prom_debug("ending prom_initialize_tce_table\n"); | |
1260 | } | |
1261 | #endif | |
1262 | ||
1263 | /* | |
1264 | * With CHRP SMP we need to use the OF to start the other processors. | |
1265 | * We can't wait until smp_boot_cpus (the OF is trashed by then) | |
1266 | * so we have to put the processors into a holding pattern controlled | |
1267 | * by the kernel (not OF) before we destroy the OF. | |
1268 | * | |
1269 | * This uses a chunk of low memory, puts some holding pattern | |
1270 | * code there and sends the other processors off to there until | |
1271 | * smp_boot_cpus tells them to do something. The holding pattern | |
1272 | * checks that address until its cpu # is there, when it is that | |
1273 | * cpu jumps to __secondary_start(). smp_boot_cpus() takes care | |
1274 | * of setting those values. | |
1275 | * | |
1276 | * We also use physical address 0x4 here to tell when a cpu | |
1277 | * is in its holding pattern code. | |
1278 | * | |
1279 | * -- Cort | |
1280 | */ | |
bbd0abda PM |
1281 | extern void __secondary_hold(void); |
1282 | extern unsigned long __secondary_hold_spinloop; | |
1283 | extern unsigned long __secondary_hold_acknowledge; | |
1284 | ||
1285 | /* | |
1286 | * We want to reference the copy of __secondary_hold_* in the | |
1287 | * 0 - 0x100 address range | |
1288 | */ | |
1289 | #define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff) | |
1290 | ||
9b6b563c PM |
1291 | static void __init prom_hold_cpus(void) |
1292 | { | |
9b6b563c PM |
1293 | unsigned long i; |
1294 | unsigned int reg; | |
1295 | phandle node; | |
1296 | char type[64]; | |
1297 | int cpuid = 0; | |
1298 | unsigned int interrupt_server[MAX_CPU_THREADS]; | |
1299 | unsigned int cpu_threads, hw_cpu_num; | |
1300 | int propsize; | |
bbd0abda | 1301 | struct prom_t *_prom = &RELOC(prom); |
9b6b563c | 1302 | unsigned long *spinloop |
bbd0abda | 1303 | = (void *) LOW_ADDR(__secondary_hold_spinloop); |
9b6b563c | 1304 | unsigned long *acknowledge |
bbd0abda | 1305 | = (void *) LOW_ADDR(__secondary_hold_acknowledge); |
9b6b563c | 1306 | #ifdef CONFIG_PPC64 |
bbd0abda | 1307 | /* __secondary_hold is actually a descriptor, not the text address */ |
9b6b563c PM |
1308 | unsigned long secondary_hold |
1309 | = __pa(*PTRRELOC((unsigned long *)__secondary_hold)); | |
1310 | #else | |
bbd0abda | 1311 | unsigned long secondary_hold = LOW_ADDR(__secondary_hold); |
9b6b563c | 1312 | #endif |
9b6b563c PM |
1313 | |
1314 | prom_debug("prom_hold_cpus: start...\n"); | |
1315 | prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop); | |
1316 | prom_debug(" 1) *spinloop = 0x%x\n", *spinloop); | |
1317 | prom_debug(" 1) acknowledge = 0x%x\n", | |
1318 | (unsigned long)acknowledge); | |
1319 | prom_debug(" 1) *acknowledge = 0x%x\n", *acknowledge); | |
1320 | prom_debug(" 1) secondary_hold = 0x%x\n", secondary_hold); | |
1321 | ||
1322 | /* Set the common spinloop variable, so all of the secondary cpus | |
1323 | * will block when they are awakened from their OF spinloop. | |
1324 | * This must occur for both SMP and non SMP kernels, since OF will | |
1325 | * be trashed when we move the kernel. | |
1326 | */ | |
1327 | *spinloop = 0; | |
1328 | ||
9b6b563c PM |
1329 | /* look for cpus */ |
1330 | for (node = 0; prom_next_node(&node); ) { | |
1331 | type[0] = 0; | |
1332 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1333 | if (strcmp(type, RELOC("cpu")) != 0) | |
1334 | continue; | |
1335 | ||
1336 | /* Skip non-configured cpus. */ | |
1337 | if (prom_getprop(node, "status", type, sizeof(type)) > 0) | |
1338 | if (strcmp(type, RELOC("okay")) != 0) | |
1339 | continue; | |
1340 | ||
1341 | reg = -1; | |
1342 | prom_getprop(node, "reg", ®, sizeof(reg)); | |
1343 | ||
1344 | prom_debug("\ncpuid = 0x%x\n", cpuid); | |
1345 | prom_debug("cpu hw idx = 0x%x\n", reg); | |
1346 | ||
1347 | /* Init the acknowledge var which will be reset by | |
1348 | * the secondary cpu when it awakens from its OF | |
1349 | * spinloop. | |
1350 | */ | |
1351 | *acknowledge = (unsigned long)-1; | |
1352 | ||
1353 | propsize = prom_getprop(node, "ibm,ppc-interrupt-server#s", | |
1354 | &interrupt_server, | |
1355 | sizeof(interrupt_server)); | |
1356 | if (propsize < 0) { | |
1357 | /* no property. old hardware has no SMT */ | |
1358 | cpu_threads = 1; | |
1359 | interrupt_server[0] = reg; /* fake it with phys id */ | |
1360 | } else { | |
1361 | /* We have a threaded processor */ | |
1362 | cpu_threads = propsize / sizeof(u32); | |
1363 | if (cpu_threads > MAX_CPU_THREADS) { | |
1364 | prom_printf("SMT: too many threads!\n" | |
1365 | "SMT: found %x, max is %x\n", | |
1366 | cpu_threads, MAX_CPU_THREADS); | |
1367 | cpu_threads = 1; /* ToDo: panic? */ | |
1368 | } | |
1369 | } | |
1370 | ||
1371 | hw_cpu_num = interrupt_server[0]; | |
1372 | if (hw_cpu_num != _prom->cpu) { | |
1373 | /* Primary Thread of non-boot cpu */ | |
1374 | prom_printf("%x : starting cpu hw idx %x... ", cpuid, reg); | |
1375 | call_prom("start-cpu", 3, 0, node, | |
1376 | secondary_hold, reg); | |
1377 | ||
bbd0abda PM |
1378 | for (i = 0; (i < 100000000) && |
1379 | (*acknowledge == ((unsigned long)-1)); i++ ) | |
9b6b563c PM |
1380 | mb(); |
1381 | ||
bbd0abda | 1382 | if (*acknowledge == reg) |
9b6b563c | 1383 | prom_printf("done\n"); |
bbd0abda | 1384 | else |
9b6b563c | 1385 | prom_printf("failed: %x\n", *acknowledge); |
9b6b563c PM |
1386 | } |
1387 | #ifdef CONFIG_SMP | |
1388 | else | |
1389 | prom_printf("%x : boot cpu %x\n", cpuid, reg); | |
9b6b563c | 1390 | #endif /* CONFIG_SMP */ |
bbd0abda PM |
1391 | |
1392 | /* Reserve cpu #s for secondary threads. They start later. */ | |
1393 | cpuid += cpu_threads; | |
9b6b563c | 1394 | } |
9b6b563c PM |
1395 | |
1396 | if (cpuid > NR_CPUS) | |
1397 | prom_printf("WARNING: maximum CPUs (" __stringify(NR_CPUS) | |
1398 | ") exceeded: ignoring extras\n"); | |
1399 | ||
1400 | prom_debug("prom_hold_cpus: end...\n"); | |
9b6b563c PM |
1401 | } |
1402 | ||
1403 | ||
1404 | static void __init prom_init_client_services(unsigned long pp) | |
1405 | { | |
1406 | struct prom_t *_prom = &RELOC(prom); | |
1407 | ||
1408 | /* Get a handle to the prom entry point before anything else */ | |
1409 | RELOC(prom_entry) = pp; | |
1410 | ||
1411 | /* get a handle for the stdout device */ | |
1412 | _prom->chosen = call_prom("finddevice", 1, 1, ADDR("/chosen")); | |
1413 | if (!PHANDLE_VALID(_prom->chosen)) | |
1414 | prom_panic("cannot find chosen"); /* msg won't be printed :( */ | |
1415 | ||
1416 | /* get device tree root */ | |
1417 | _prom->root = call_prom("finddevice", 1, 1, ADDR("/")); | |
1418 | if (!PHANDLE_VALID(_prom->root)) | |
1419 | prom_panic("cannot find device tree root"); /* msg won't be printed :( */ | |
a575b807 PM |
1420 | |
1421 | _prom->mmumap = 0; | |
1422 | } | |
1423 | ||
1424 | #ifdef CONFIG_PPC32 | |
1425 | /* | |
1426 | * For really old powermacs, we need to map things we claim. | |
1427 | * For that, we need the ihandle of the mmu. | |
a23414be | 1428 | * Also, on the longtrail, we need to work around other bugs. |
a575b807 PM |
1429 | */ |
1430 | static void __init prom_find_mmu(void) | |
1431 | { | |
1432 | struct prom_t *_prom = &RELOC(prom); | |
1433 | phandle oprom; | |
1434 | char version[64]; | |
1435 | ||
1436 | oprom = call_prom("finddevice", 1, 1, ADDR("/openprom")); | |
1437 | if (!PHANDLE_VALID(oprom)) | |
1438 | return; | |
1439 | if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0) | |
1440 | return; | |
1441 | version[sizeof(version) - 1] = 0; | |
a575b807 | 1442 | /* XXX might need to add other versions here */ |
a23414be PM |
1443 | if (strcmp(version, "Open Firmware, 1.0.5") == 0) |
1444 | of_workarounds = OF_WA_CLAIM; | |
1445 | else if (strncmp(version, "FirmWorks,3.", 12) == 0) { | |
1446 | of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL; | |
1447 | call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim"); | |
1448 | } else | |
a575b807 | 1449 | return; |
a23414be | 1450 | _prom->memory = call_prom("open", 1, 1, ADDR("/memory")); |
a575b807 PM |
1451 | prom_getprop(_prom->chosen, "mmu", &_prom->mmumap, |
1452 | sizeof(_prom->mmumap)); | |
a23414be PM |
1453 | if (!IHANDLE_VALID(_prom->memory) || !IHANDLE_VALID(_prom->mmumap)) |
1454 | of_workarounds &= ~OF_WA_CLAIM; /* hmmm */ | |
9b6b563c | 1455 | } |
a575b807 PM |
1456 | #else |
1457 | #define prom_find_mmu() | |
1458 | #endif | |
9b6b563c PM |
1459 | |
1460 | static void __init prom_init_stdout(void) | |
1461 | { | |
1462 | struct prom_t *_prom = &RELOC(prom); | |
1463 | char *path = RELOC(of_stdout_device); | |
1464 | char type[16]; | |
1465 | u32 val; | |
1466 | ||
1467 | if (prom_getprop(_prom->chosen, "stdout", &val, sizeof(val)) <= 0) | |
1468 | prom_panic("cannot find stdout"); | |
1469 | ||
1470 | _prom->stdout = val; | |
1471 | ||
1472 | /* Get the full OF pathname of the stdout device */ | |
1473 | memset(path, 0, 256); | |
1474 | call_prom("instance-to-path", 3, 1, _prom->stdout, path, 255); | |
1475 | val = call_prom("instance-to-package", 1, 1, _prom->stdout); | |
a23414be PM |
1476 | prom_setprop(_prom->chosen, "/chosen", "linux,stdout-package", |
1477 | &val, sizeof(val)); | |
9b6b563c | 1478 | prom_printf("OF stdout device is: %s\n", RELOC(of_stdout_device)); |
a23414be PM |
1479 | prom_setprop(_prom->chosen, "/chosen", "linux,stdout-path", |
1480 | path, strlen(path) + 1); | |
9b6b563c PM |
1481 | |
1482 | /* If it's a display, note it */ | |
1483 | memset(type, 0, sizeof(type)); | |
1484 | prom_getprop(val, "device_type", type, sizeof(type)); | |
1485 | if (strcmp(type, RELOC("display")) == 0) | |
a23414be | 1486 | prom_setprop(val, path, "linux,boot-display", NULL, 0); |
9b6b563c PM |
1487 | } |
1488 | ||
1489 | static void __init prom_close_stdin(void) | |
1490 | { | |
1491 | struct prom_t *_prom = &RELOC(prom); | |
1492 | ihandle val; | |
1493 | ||
1494 | if (prom_getprop(_prom->chosen, "stdin", &val, sizeof(val)) > 0) | |
1495 | call_prom("close", 1, 0, val); | |
1496 | } | |
1497 | ||
1498 | static int __init prom_find_machine_type(void) | |
1499 | { | |
1500 | struct prom_t *_prom = &RELOC(prom); | |
1501 | char compat[256]; | |
1502 | int len, i = 0; | |
21fe3301 | 1503 | #ifdef CONFIG_PPC64 |
9b6b563c | 1504 | phandle rtas; |
e8222502 | 1505 | int x; |
21fe3301 | 1506 | #endif |
e8222502 BH |
1507 | |
1508 | /* Look for a PowerMac */ | |
9b6b563c PM |
1509 | len = prom_getprop(_prom->root, "compatible", |
1510 | compat, sizeof(compat)-1); | |
1511 | if (len > 0) { | |
1512 | compat[len] = 0; | |
1513 | while (i < len) { | |
1514 | char *p = &compat[i]; | |
1515 | int sl = strlen(p); | |
1516 | if (sl == 0) | |
1517 | break; | |
1518 | if (strstr(p, RELOC("Power Macintosh")) || | |
a575b807 | 1519 | strstr(p, RELOC("MacRISC"))) |
9b6b563c | 1520 | return PLATFORM_POWERMAC; |
9b6b563c PM |
1521 | i += sl + 1; |
1522 | } | |
1523 | } | |
1524 | #ifdef CONFIG_PPC64 | |
e8222502 BH |
1525 | /* If not a mac, try to figure out if it's an IBM pSeries or any other |
1526 | * PAPR compliant platform. We assume it is if : | |
1527 | * - /device_type is "chrp" (please, do NOT use that for future | |
1528 | * non-IBM designs ! | |
1529 | * - it has /rtas | |
1530 | */ | |
1531 | len = prom_getprop(_prom->root, "model", | |
1532 | compat, sizeof(compat)-1); | |
1533 | if (len <= 0) | |
1534 | return PLATFORM_GENERIC; | |
1535 | compat[len] = 0; | |
1536 | if (strcmp(compat, "chrp")) | |
1537 | return PLATFORM_GENERIC; | |
1538 | ||
9b6b563c PM |
1539 | /* Default to pSeries. We need to know if we are running LPAR */ |
1540 | rtas = call_prom("finddevice", 1, 1, ADDR("/rtas")); | |
e8222502 BH |
1541 | if (!PHANDLE_VALID(rtas)) |
1542 | return PLATFORM_GENERIC; | |
1543 | x = prom_getproplen(rtas, "ibm,hypertas-functions"); | |
1544 | if (x != PROM_ERROR) { | |
1545 | prom_printf("Hypertas detected, assuming LPAR !\n"); | |
1546 | return PLATFORM_PSERIES_LPAR; | |
9b6b563c PM |
1547 | } |
1548 | return PLATFORM_PSERIES; | |
1549 | #else | |
e8222502 | 1550 | return PLATFORM_GENERIC; |
9b6b563c PM |
1551 | #endif |
1552 | } | |
1553 | ||
9b6b563c PM |
1554 | static int __init prom_set_color(ihandle ih, int i, int r, int g, int b) |
1555 | { | |
1556 | return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r); | |
1557 | } | |
1558 | ||
1559 | /* | |
1560 | * If we have a display that we don't know how to drive, | |
1561 | * we will want to try to execute OF's open method for it | |
1562 | * later. However, OF will probably fall over if we do that | |
1563 | * we've taken over the MMU. | |
1564 | * So we check whether we will need to open the display, | |
1565 | * and if so, open it now. | |
1566 | */ | |
1567 | static void __init prom_check_displays(void) | |
1568 | { | |
1569 | char type[16], *path; | |
1570 | phandle node; | |
1571 | ihandle ih; | |
1572 | int i; | |
9b6b563c PM |
1573 | |
1574 | static unsigned char default_colors[] = { | |
1575 | 0x00, 0x00, 0x00, | |
1576 | 0x00, 0x00, 0xaa, | |
1577 | 0x00, 0xaa, 0x00, | |
1578 | 0x00, 0xaa, 0xaa, | |
1579 | 0xaa, 0x00, 0x00, | |
1580 | 0xaa, 0x00, 0xaa, | |
1581 | 0xaa, 0xaa, 0x00, | |
1582 | 0xaa, 0xaa, 0xaa, | |
1583 | 0x55, 0x55, 0x55, | |
1584 | 0x55, 0x55, 0xff, | |
1585 | 0x55, 0xff, 0x55, | |
1586 | 0x55, 0xff, 0xff, | |
1587 | 0xff, 0x55, 0x55, | |
1588 | 0xff, 0x55, 0xff, | |
1589 | 0xff, 0xff, 0x55, | |
1590 | 0xff, 0xff, 0xff | |
1591 | }; | |
1592 | const unsigned char *clut; | |
1593 | ||
1594 | prom_printf("Looking for displays\n"); | |
1595 | for (node = 0; prom_next_node(&node); ) { | |
1596 | memset(type, 0, sizeof(type)); | |
1597 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1598 | if (strcmp(type, RELOC("display")) != 0) | |
1599 | continue; | |
1600 | ||
1601 | /* It seems OF doesn't null-terminate the path :-( */ | |
1602 | path = RELOC(prom_scratch); | |
1603 | memset(path, 0, PROM_SCRATCH_SIZE); | |
1604 | ||
1605 | /* | |
1606 | * leave some room at the end of the path for appending extra | |
1607 | * arguments | |
1608 | */ | |
1609 | if (call_prom("package-to-path", 3, 1, node, path, | |
1610 | PROM_SCRATCH_SIZE-10) == PROM_ERROR) | |
1611 | continue; | |
1612 | prom_printf("found display : %s, opening ... ", path); | |
1613 | ||
1614 | ih = call_prom("open", 1, 1, path); | |
1615 | if (ih == 0) { | |
1616 | prom_printf("failed\n"); | |
1617 | continue; | |
1618 | } | |
1619 | ||
1620 | /* Success */ | |
1621 | prom_printf("done\n"); | |
a23414be | 1622 | prom_setprop(node, path, "linux,opened", NULL, 0); |
9b6b563c PM |
1623 | |
1624 | /* Setup a usable color table when the appropriate | |
1625 | * method is available. Should update this to set-colors */ | |
1626 | clut = RELOC(default_colors); | |
1627 | for (i = 0; i < 32; i++, clut += 3) | |
1628 | if (prom_set_color(ih, i, clut[0], clut[1], | |
1629 | clut[2]) != 0) | |
1630 | break; | |
1631 | ||
1632 | #ifdef CONFIG_LOGO_LINUX_CLUT224 | |
1633 | clut = PTRRELOC(RELOC(logo_linux_clut224.clut)); | |
1634 | for (i = 0; i < RELOC(logo_linux_clut224.clutsize); i++, clut += 3) | |
1635 | if (prom_set_color(ih, i + 32, clut[0], clut[1], | |
1636 | clut[2]) != 0) | |
1637 | break; | |
1638 | #endif /* CONFIG_LOGO_LINUX_CLUT224 */ | |
9b6b563c PM |
1639 | } |
1640 | } | |
1641 | ||
1642 | ||
1643 | /* Return (relocated) pointer to this much memory: moves initrd if reqd. */ | |
1644 | static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end, | |
1645 | unsigned long needed, unsigned long align) | |
1646 | { | |
1647 | void *ret; | |
1648 | ||
1649 | *mem_start = _ALIGN(*mem_start, align); | |
1650 | while ((*mem_start + needed) > *mem_end) { | |
1651 | unsigned long room, chunk; | |
1652 | ||
1653 | prom_debug("Chunk exhausted, claiming more at %x...\n", | |
1654 | RELOC(alloc_bottom)); | |
1655 | room = RELOC(alloc_top) - RELOC(alloc_bottom); | |
1656 | if (room > DEVTREE_CHUNK_SIZE) | |
1657 | room = DEVTREE_CHUNK_SIZE; | |
1658 | if (room < PAGE_SIZE) | |
1659 | prom_panic("No memory for flatten_device_tree (no room)"); | |
1660 | chunk = alloc_up(room, 0); | |
1661 | if (chunk == 0) | |
1662 | prom_panic("No memory for flatten_device_tree (claim failed)"); | |
1663 | *mem_end = RELOC(alloc_top); | |
1664 | } | |
1665 | ||
1666 | ret = (void *)*mem_start; | |
1667 | *mem_start += needed; | |
1668 | ||
1669 | return ret; | |
1670 | } | |
1671 | ||
1672 | #define dt_push_token(token, mem_start, mem_end) \ | |
1673 | do { *((u32 *)make_room(mem_start, mem_end, 4, 4)) = token; } while(0) | |
1674 | ||
1675 | static unsigned long __init dt_find_string(char *str) | |
1676 | { | |
1677 | char *s, *os; | |
1678 | ||
1679 | s = os = (char *)RELOC(dt_string_start); | |
1680 | s += 4; | |
1681 | while (s < (char *)RELOC(dt_string_end)) { | |
1682 | if (strcmp(s, str) == 0) | |
1683 | return s - os; | |
1684 | s += strlen(s) + 1; | |
1685 | } | |
1686 | return 0; | |
1687 | } | |
1688 | ||
1689 | /* | |
1690 | * The Open Firmware 1275 specification states properties must be 31 bytes or | |
1691 | * less, however not all firmwares obey this. Make it 64 bytes to be safe. | |
1692 | */ | |
1693 | #define MAX_PROPERTY_NAME 64 | |
1694 | ||
1695 | static void __init scan_dt_build_strings(phandle node, | |
1696 | unsigned long *mem_start, | |
1697 | unsigned long *mem_end) | |
1698 | { | |
1699 | char *prev_name, *namep, *sstart; | |
1700 | unsigned long soff; | |
1701 | phandle child; | |
1702 | ||
1703 | sstart = (char *)RELOC(dt_string_start); | |
1704 | ||
1705 | /* get and store all property names */ | |
1706 | prev_name = RELOC(""); | |
1707 | for (;;) { | |
1708 | /* 64 is max len of name including nul. */ | |
1709 | namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1); | |
1710 | if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) { | |
1711 | /* No more nodes: unwind alloc */ | |
1712 | *mem_start = (unsigned long)namep; | |
1713 | break; | |
1714 | } | |
1715 | ||
1716 | /* skip "name" */ | |
1717 | if (strcmp(namep, RELOC("name")) == 0) { | |
1718 | *mem_start = (unsigned long)namep; | |
1719 | prev_name = RELOC("name"); | |
1720 | continue; | |
1721 | } | |
1722 | /* get/create string entry */ | |
1723 | soff = dt_find_string(namep); | |
1724 | if (soff != 0) { | |
1725 | *mem_start = (unsigned long)namep; | |
1726 | namep = sstart + soff; | |
1727 | } else { | |
1728 | /* Trim off some if we can */ | |
1729 | *mem_start = (unsigned long)namep + strlen(namep) + 1; | |
1730 | RELOC(dt_string_end) = *mem_start; | |
1731 | } | |
1732 | prev_name = namep; | |
1733 | } | |
1734 | ||
1735 | /* do all our children */ | |
1736 | child = call_prom("child", 1, 1, node); | |
1737 | while (child != 0) { | |
1738 | scan_dt_build_strings(child, mem_start, mem_end); | |
1739 | child = call_prom("peer", 1, 1, child); | |
1740 | } | |
1741 | } | |
1742 | ||
1743 | static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start, | |
1744 | unsigned long *mem_end) | |
1745 | { | |
1746 | phandle child; | |
1747 | char *namep, *prev_name, *sstart, *p, *ep, *lp, *path; | |
1748 | unsigned long soff; | |
1749 | unsigned char *valp; | |
1750 | static char pname[MAX_PROPERTY_NAME]; | |
c4988820 | 1751 | int l, room; |
9b6b563c PM |
1752 | |
1753 | dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end); | |
1754 | ||
1755 | /* get the node's full name */ | |
1756 | namep = (char *)*mem_start; | |
c4988820 PM |
1757 | room = *mem_end - *mem_start; |
1758 | if (room > 255) | |
1759 | room = 255; | |
1760 | l = call_prom("package-to-path", 3, 1, node, namep, room); | |
9b6b563c PM |
1761 | if (l >= 0) { |
1762 | /* Didn't fit? Get more room. */ | |
c4988820 PM |
1763 | if (l >= room) { |
1764 | if (l >= *mem_end - *mem_start) | |
1765 | namep = make_room(mem_start, mem_end, l+1, 1); | |
9b6b563c PM |
1766 | call_prom("package-to-path", 3, 1, node, namep, l); |
1767 | } | |
1768 | namep[l] = '\0'; | |
1769 | ||
1770 | /* Fixup an Apple bug where they have bogus \0 chars in the | |
a575b807 PM |
1771 | * middle of the path in some properties, and extract |
1772 | * the unit name (everything after the last '/'). | |
9b6b563c | 1773 | */ |
a575b807 | 1774 | for (lp = p = namep, ep = namep + l; p < ep; p++) { |
9b6b563c | 1775 | if (*p == '/') |
a575b807 PM |
1776 | lp = namep; |
1777 | else if (*p != 0) | |
1778 | *lp++ = *p; | |
1779 | } | |
1780 | *lp = 0; | |
1781 | *mem_start = _ALIGN((unsigned long)lp + 1, 4); | |
9b6b563c PM |
1782 | } |
1783 | ||
1784 | /* get it again for debugging */ | |
1785 | path = RELOC(prom_scratch); | |
1786 | memset(path, 0, PROM_SCRATCH_SIZE); | |
1787 | call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); | |
1788 | ||
1789 | /* get and store all properties */ | |
1790 | prev_name = RELOC(""); | |
1791 | sstart = (char *)RELOC(dt_string_start); | |
1792 | for (;;) { | |
1793 | if (call_prom("nextprop", 3, 1, node, prev_name, | |
1794 | RELOC(pname)) != 1) | |
1795 | break; | |
1796 | ||
1797 | /* skip "name" */ | |
1798 | if (strcmp(RELOC(pname), RELOC("name")) == 0) { | |
1799 | prev_name = RELOC("name"); | |
1800 | continue; | |
1801 | } | |
1802 | ||
1803 | /* find string offset */ | |
1804 | soff = dt_find_string(RELOC(pname)); | |
1805 | if (soff == 0) { | |
1806 | prom_printf("WARNING: Can't find string index for" | |
1807 | " <%s>, node %s\n", RELOC(pname), path); | |
1808 | break; | |
1809 | } | |
1810 | prev_name = sstart + soff; | |
1811 | ||
1812 | /* get length */ | |
1813 | l = call_prom("getproplen", 2, 1, node, RELOC(pname)); | |
1814 | ||
1815 | /* sanity checks */ | |
1816 | if (l == PROM_ERROR) | |
1817 | continue; | |
1818 | if (l > MAX_PROPERTY_LENGTH) { | |
1819 | prom_printf("WARNING: ignoring large property "); | |
1820 | /* It seems OF doesn't null-terminate the path :-( */ | |
1821 | prom_printf("[%s] ", path); | |
1822 | prom_printf("%s length 0x%x\n", RELOC(pname), l); | |
1823 | continue; | |
1824 | } | |
1825 | ||
1826 | /* push property head */ | |
1827 | dt_push_token(OF_DT_PROP, mem_start, mem_end); | |
1828 | dt_push_token(l, mem_start, mem_end); | |
1829 | dt_push_token(soff, mem_start, mem_end); | |
1830 | ||
1831 | /* push property content */ | |
1832 | valp = make_room(mem_start, mem_end, l, 4); | |
1833 | call_prom("getprop", 4, 1, node, RELOC(pname), valp, l); | |
1834 | *mem_start = _ALIGN(*mem_start, 4); | |
1835 | } | |
1836 | ||
1837 | /* Add a "linux,phandle" property. */ | |
1838 | soff = dt_find_string(RELOC("linux,phandle")); | |
1839 | if (soff == 0) | |
1840 | prom_printf("WARNING: Can't find string index for" | |
1841 | " <linux-phandle> node %s\n", path); | |
1842 | else { | |
1843 | dt_push_token(OF_DT_PROP, mem_start, mem_end); | |
1844 | dt_push_token(4, mem_start, mem_end); | |
1845 | dt_push_token(soff, mem_start, mem_end); | |
1846 | valp = make_room(mem_start, mem_end, 4, 4); | |
1847 | *(u32 *)valp = node; | |
1848 | } | |
1849 | ||
1850 | /* do all our children */ | |
1851 | child = call_prom("child", 1, 1, node); | |
1852 | while (child != 0) { | |
1853 | scan_dt_build_struct(child, mem_start, mem_end); | |
1854 | child = call_prom("peer", 1, 1, child); | |
1855 | } | |
1856 | ||
1857 | dt_push_token(OF_DT_END_NODE, mem_start, mem_end); | |
1858 | } | |
1859 | ||
1860 | static void __init flatten_device_tree(void) | |
1861 | { | |
1862 | phandle root; | |
1863 | unsigned long mem_start, mem_end, room; | |
1864 | struct boot_param_header *hdr; | |
1865 | struct prom_t *_prom = &RELOC(prom); | |
1866 | char *namep; | |
1867 | u64 *rsvmap; | |
1868 | ||
1869 | /* | |
1870 | * Check how much room we have between alloc top & bottom (+/- a | |
1871 | * few pages), crop to 4Mb, as this is our "chuck" size | |
1872 | */ | |
1873 | room = RELOC(alloc_top) - RELOC(alloc_bottom) - 0x4000; | |
1874 | if (room > DEVTREE_CHUNK_SIZE) | |
1875 | room = DEVTREE_CHUNK_SIZE; | |
1876 | prom_debug("starting device tree allocs at %x\n", RELOC(alloc_bottom)); | |
1877 | ||
1878 | /* Now try to claim that */ | |
1879 | mem_start = (unsigned long)alloc_up(room, PAGE_SIZE); | |
1880 | if (mem_start == 0) | |
1881 | prom_panic("Can't allocate initial device-tree chunk\n"); | |
1882 | mem_end = RELOC(alloc_top); | |
1883 | ||
1884 | /* Get root of tree */ | |
1885 | root = call_prom("peer", 1, 1, (phandle)0); | |
1886 | if (root == (phandle)0) | |
1887 | prom_panic ("couldn't get device tree root\n"); | |
1888 | ||
1889 | /* Build header and make room for mem rsv map */ | |
1890 | mem_start = _ALIGN(mem_start, 4); | |
1891 | hdr = make_room(&mem_start, &mem_end, | |
1892 | sizeof(struct boot_param_header), 4); | |
1893 | RELOC(dt_header_start) = (unsigned long)hdr; | |
1894 | rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8); | |
1895 | ||
1896 | /* Start of strings */ | |
1897 | mem_start = PAGE_ALIGN(mem_start); | |
1898 | RELOC(dt_string_start) = mem_start; | |
1899 | mem_start += 4; /* hole */ | |
1900 | ||
1901 | /* Add "linux,phandle" in there, we'll need it */ | |
1902 | namep = make_room(&mem_start, &mem_end, 16, 1); | |
1903 | strcpy(namep, RELOC("linux,phandle")); | |
1904 | mem_start = (unsigned long)namep + strlen(namep) + 1; | |
1905 | ||
1906 | /* Build string array */ | |
1907 | prom_printf("Building dt strings...\n"); | |
1908 | scan_dt_build_strings(root, &mem_start, &mem_end); | |
1909 | RELOC(dt_string_end) = mem_start; | |
1910 | ||
1911 | /* Build structure */ | |
1912 | mem_start = PAGE_ALIGN(mem_start); | |
1913 | RELOC(dt_struct_start) = mem_start; | |
1914 | prom_printf("Building dt structure...\n"); | |
1915 | scan_dt_build_struct(root, &mem_start, &mem_end); | |
1916 | dt_push_token(OF_DT_END, &mem_start, &mem_end); | |
1917 | RELOC(dt_struct_end) = PAGE_ALIGN(mem_start); | |
1918 | ||
1919 | /* Finish header */ | |
1920 | hdr->boot_cpuid_phys = _prom->cpu; | |
1921 | hdr->magic = OF_DT_HEADER; | |
1922 | hdr->totalsize = RELOC(dt_struct_end) - RELOC(dt_header_start); | |
1923 | hdr->off_dt_struct = RELOC(dt_struct_start) - RELOC(dt_header_start); | |
1924 | hdr->off_dt_strings = RELOC(dt_string_start) - RELOC(dt_header_start); | |
1925 | hdr->dt_strings_size = RELOC(dt_string_end) - RELOC(dt_string_start); | |
1926 | hdr->off_mem_rsvmap = ((unsigned long)rsvmap) - RELOC(dt_header_start); | |
1927 | hdr->version = OF_DT_VERSION; | |
1928 | /* Version 16 is not backward compatible */ | |
1929 | hdr->last_comp_version = 0x10; | |
1930 | ||
1931 | /* Reserve the whole thing and copy the reserve map in, we | |
1932 | * also bump mem_reserve_cnt to cause further reservations to | |
1933 | * fail since it's too late. | |
1934 | */ | |
1935 | reserve_mem(RELOC(dt_header_start), hdr->totalsize); | |
1936 | memcpy(rsvmap, RELOC(mem_reserve_map), sizeof(mem_reserve_map)); | |
1937 | ||
1938 | #ifdef DEBUG_PROM | |
1939 | { | |
1940 | int i; | |
1941 | prom_printf("reserved memory map:\n"); | |
1942 | for (i = 0; i < RELOC(mem_reserve_cnt); i++) | |
1943 | prom_printf(" %x - %x\n", | |
1944 | RELOC(mem_reserve_map)[i].base, | |
1945 | RELOC(mem_reserve_map)[i].size); | |
1946 | } | |
1947 | #endif | |
1948 | RELOC(mem_reserve_cnt) = MEM_RESERVE_MAP_SIZE; | |
1949 | ||
1950 | prom_printf("Device tree strings 0x%x -> 0x%x\n", | |
1951 | RELOC(dt_string_start), RELOC(dt_string_end)); | |
1952 | prom_printf("Device tree struct 0x%x -> 0x%x\n", | |
1953 | RELOC(dt_struct_start), RELOC(dt_struct_end)); | |
1954 | ||
1955 | } | |
1956 | ||
1957 | ||
1958 | static void __init fixup_device_tree(void) | |
1959 | { | |
1960 | #if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC) | |
1961 | phandle u3, i2c, mpic; | |
1962 | u32 u3_rev; | |
1963 | u32 interrupts[2]; | |
1964 | u32 parent; | |
1965 | ||
1966 | /* Some G5s have a missing interrupt definition, fix it up here */ | |
1967 | u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000")); | |
1968 | if (!PHANDLE_VALID(u3)) | |
1969 | return; | |
1970 | i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000")); | |
1971 | if (!PHANDLE_VALID(i2c)) | |
1972 | return; | |
1973 | mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000")); | |
1974 | if (!PHANDLE_VALID(mpic)) | |
1975 | return; | |
1976 | ||
1977 | /* check if proper rev of u3 */ | |
1978 | if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev)) | |
1979 | == PROM_ERROR) | |
1980 | return; | |
7d49697e | 1981 | if (u3_rev < 0x35 || u3_rev > 0x39) |
9b6b563c PM |
1982 | return; |
1983 | /* does it need fixup ? */ | |
1984 | if (prom_getproplen(i2c, "interrupts") > 0) | |
1985 | return; | |
1986 | ||
1987 | prom_printf("fixing up bogus interrupts for u3 i2c...\n"); | |
1988 | ||
1989 | /* interrupt on this revision of u3 is number 0 and level */ | |
1990 | interrupts[0] = 0; | |
1991 | interrupts[1] = 1; | |
a23414be PM |
1992 | prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts", |
1993 | &interrupts, sizeof(interrupts)); | |
9b6b563c | 1994 | parent = (u32)mpic; |
a23414be PM |
1995 | prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent", |
1996 | &parent, sizeof(parent)); | |
9b6b563c PM |
1997 | #endif |
1998 | } | |
1999 | ||
2000 | ||
2001 | static void __init prom_find_boot_cpu(void) | |
2002 | { | |
2003 | struct prom_t *_prom = &RELOC(prom); | |
2004 | u32 getprop_rval; | |
2005 | ihandle prom_cpu; | |
2006 | phandle cpu_pkg; | |
2007 | ||
a575b807 | 2008 | _prom->cpu = 0; |
9b6b563c | 2009 | if (prom_getprop(_prom->chosen, "cpu", &prom_cpu, sizeof(prom_cpu)) <= 0) |
a575b807 | 2010 | return; |
9b6b563c PM |
2011 | |
2012 | cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu); | |
2013 | ||
2014 | prom_getprop(cpu_pkg, "reg", &getprop_rval, sizeof(getprop_rval)); | |
2015 | _prom->cpu = getprop_rval; | |
2016 | ||
2017 | prom_debug("Booting CPU hw index = 0x%x\n", _prom->cpu); | |
2018 | } | |
2019 | ||
2020 | static void __init prom_check_initrd(unsigned long r3, unsigned long r4) | |
2021 | { | |
2022 | #ifdef CONFIG_BLK_DEV_INITRD | |
2023 | struct prom_t *_prom = &RELOC(prom); | |
2024 | ||
2025 | if (r3 && r4 && r4 != 0xdeadbeef) { | |
2026 | unsigned long val; | |
2027 | ||
51fae6de | 2028 | RELOC(prom_initrd_start) = is_kernel_addr(r3) ? __pa(r3) : r3; |
9b6b563c PM |
2029 | RELOC(prom_initrd_end) = RELOC(prom_initrd_start) + r4; |
2030 | ||
2031 | val = RELOC(prom_initrd_start); | |
a23414be PM |
2032 | prom_setprop(_prom->chosen, "/chosen", "linux,initrd-start", |
2033 | &val, sizeof(val)); | |
9b6b563c | 2034 | val = RELOC(prom_initrd_end); |
a23414be PM |
2035 | prom_setprop(_prom->chosen, "/chosen", "linux,initrd-end", |
2036 | &val, sizeof(val)); | |
9b6b563c PM |
2037 | |
2038 | reserve_mem(RELOC(prom_initrd_start), | |
2039 | RELOC(prom_initrd_end) - RELOC(prom_initrd_start)); | |
2040 | ||
2041 | prom_debug("initrd_start=0x%x\n", RELOC(prom_initrd_start)); | |
2042 | prom_debug("initrd_end=0x%x\n", RELOC(prom_initrd_end)); | |
2043 | } | |
2044 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
2045 | } | |
2046 | ||
2047 | /* | |
2048 | * We enter here early on, when the Open Firmware prom is still | |
2049 | * handling exceptions and the MMU hash table for us. | |
2050 | */ | |
2051 | ||
2052 | unsigned long __init prom_init(unsigned long r3, unsigned long r4, | |
2053 | unsigned long pp, | |
2054 | unsigned long r6, unsigned long r7) | |
2055 | { | |
2056 | struct prom_t *_prom; | |
9b6b563c | 2057 | unsigned long hdr; |
b42b6617 | 2058 | unsigned long offset = reloc_offset(); |
9b6b563c PM |
2059 | |
2060 | #ifdef CONFIG_PPC32 | |
9b6b563c PM |
2061 | reloc_got2(offset); |
2062 | #endif | |
2063 | ||
2064 | _prom = &RELOC(prom); | |
2065 | ||
2066 | /* | |
2067 | * First zero the BSS | |
2068 | */ | |
2069 | memset(&RELOC(__bss_start), 0, __bss_stop - __bss_start); | |
2070 | ||
2071 | /* | |
2072 | * Init interface to Open Firmware, get some node references, | |
2073 | * like /chosen | |
2074 | */ | |
2075 | prom_init_client_services(pp); | |
2076 | ||
2077 | /* | |
a23414be PM |
2078 | * See if this OF is old enough that we need to do explicit maps |
2079 | * and other workarounds | |
9b6b563c | 2080 | */ |
a23414be | 2081 | prom_find_mmu(); |
9b6b563c | 2082 | |
a575b807 | 2083 | /* |
a23414be | 2084 | * Init prom stdout device |
a575b807 | 2085 | */ |
a23414be | 2086 | prom_init_stdout(); |
a575b807 | 2087 | |
9b6b563c PM |
2088 | /* |
2089 | * Get default machine type. At this point, we do not differentiate | |
2090 | * between pSeries SMP and pSeries LPAR | |
2091 | */ | |
2092 | RELOC(of_platform) = prom_find_machine_type(); | |
9b6b563c | 2093 | |
add60ef3 OH |
2094 | /* Bail if this is a kdump kernel. */ |
2095 | if (PHYSICAL_START > 0) | |
2096 | prom_panic("Error: You can't boot a kdump kernel from OF!\n"); | |
2097 | ||
2098 | /* | |
2099 | * Check for an initrd | |
2100 | */ | |
2101 | prom_check_initrd(r3, r4); | |
2102 | ||
9b6b563c PM |
2103 | #ifdef CONFIG_PPC_PSERIES |
2104 | /* | |
2105 | * On pSeries, inform the firmware about our capabilities | |
2106 | */ | |
799d6046 PM |
2107 | if (RELOC(of_platform) == PLATFORM_PSERIES || |
2108 | RELOC(of_platform) == PLATFORM_PSERIES_LPAR) | |
9b6b563c PM |
2109 | prom_send_capabilities(); |
2110 | #endif | |
2111 | ||
9b6b563c | 2112 | /* |
f3f66f59 | 2113 | * Copy the CPU hold code |
9b6b563c | 2114 | */ |
55d36339 | 2115 | if (RELOC(of_platform) != PLATFORM_POWERMAC) |
5a408329 | 2116 | copy_and_flush(0, KERNELBASE + offset, 0x100, 0); |
9b6b563c PM |
2117 | |
2118 | /* | |
2119 | * Do early parsing of command line | |
2120 | */ | |
2121 | early_cmdline_parse(); | |
2122 | ||
2123 | /* | |
2124 | * Initialize memory management within prom_init | |
2125 | */ | |
2126 | prom_init_mem(); | |
2127 | ||
dcee3036 ME |
2128 | #ifdef CONFIG_KEXEC |
2129 | if (RELOC(prom_crashk_base)) | |
2130 | reserve_mem(RELOC(prom_crashk_base), RELOC(prom_crashk_size)); | |
2131 | #endif | |
9b6b563c PM |
2132 | /* |
2133 | * Determine which cpu is actually running right _now_ | |
2134 | */ | |
2135 | prom_find_boot_cpu(); | |
2136 | ||
2137 | /* | |
2138 | * Initialize display devices | |
2139 | */ | |
2140 | prom_check_displays(); | |
2141 | ||
2142 | #ifdef CONFIG_PPC64 | |
2143 | /* | |
2144 | * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else | |
2145 | * that uses the allocator, we need to make sure we get the top of memory | |
2146 | * available for us here... | |
2147 | */ | |
2148 | if (RELOC(of_platform) == PLATFORM_PSERIES) | |
2149 | prom_initialize_tce_table(); | |
2150 | #endif | |
2151 | ||
2152 | /* | |
2153 | * On non-powermacs, try to instantiate RTAS and puts all CPUs | |
2154 | * in spin-loops. PowerMacs don't have a working RTAS and use | |
2155 | * a different way to spin CPUs | |
2156 | */ | |
2157 | if (RELOC(of_platform) != PLATFORM_POWERMAC) { | |
2158 | prom_instantiate_rtas(); | |
2159 | prom_hold_cpus(); | |
2160 | } | |
2161 | ||
2162 | /* | |
2163 | * Fill in some infos for use by the kernel later on | |
2164 | */ | |
2165 | if (RELOC(prom_memory_limit)) | |
a23414be | 2166 | prom_setprop(_prom->chosen, "/chosen", "linux,memory-limit", |
9b6b563c PM |
2167 | &RELOC(prom_memory_limit), |
2168 | sizeof(prom_memory_limit)); | |
2169 | #ifdef CONFIG_PPC64 | |
2170 | if (RELOC(ppc64_iommu_off)) | |
a23414be PM |
2171 | prom_setprop(_prom->chosen, "/chosen", "linux,iommu-off", |
2172 | NULL, 0); | |
9b6b563c PM |
2173 | |
2174 | if (RELOC(iommu_force_on)) | |
a23414be PM |
2175 | prom_setprop(_prom->chosen, "/chosen", "linux,iommu-force-on", |
2176 | NULL, 0); | |
9b6b563c PM |
2177 | |
2178 | if (RELOC(prom_tce_alloc_start)) { | |
a23414be | 2179 | prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-start", |
9b6b563c PM |
2180 | &RELOC(prom_tce_alloc_start), |
2181 | sizeof(prom_tce_alloc_start)); | |
a23414be | 2182 | prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-end", |
9b6b563c PM |
2183 | &RELOC(prom_tce_alloc_end), |
2184 | sizeof(prom_tce_alloc_end)); | |
2185 | } | |
2186 | #endif | |
2187 | ||
dcee3036 ME |
2188 | #ifdef CONFIG_KEXEC |
2189 | if (RELOC(prom_crashk_base)) { | |
2190 | prom_setprop(_prom->chosen, "/chosen", "linux,crashkernel-base", | |
2191 | PTRRELOC(&prom_crashk_base), | |
2192 | sizeof(RELOC(prom_crashk_base))); | |
2193 | prom_setprop(_prom->chosen, "/chosen", "linux,crashkernel-size", | |
2194 | PTRRELOC(&prom_crashk_size), | |
2195 | sizeof(RELOC(prom_crashk_size))); | |
2196 | } | |
2197 | #endif | |
9b6b563c PM |
2198 | /* |
2199 | * Fixup any known bugs in the device-tree | |
2200 | */ | |
2201 | fixup_device_tree(); | |
2202 | ||
2203 | /* | |
2204 | * Now finally create the flattened device-tree | |
2205 | */ | |
2206 | prom_printf("copying OF device tree ...\n"); | |
2207 | flatten_device_tree(); | |
2208 | ||
3825ac0e PM |
2209 | /* |
2210 | * in case stdin is USB and still active on IBM machines... | |
2211 | * Unfortunately quiesce crashes on some powermacs if we have | |
2212 | * closed stdin already (in particular the powerbook 101). | |
2213 | */ | |
2214 | if (RELOC(of_platform) != PLATFORM_POWERMAC) | |
2215 | prom_close_stdin(); | |
9b6b563c PM |
2216 | |
2217 | /* | |
2218 | * Call OF "quiesce" method to shut down pending DMA's from | |
2219 | * devices etc... | |
2220 | */ | |
2221 | prom_printf("Calling quiesce ...\n"); | |
2222 | call_prom("quiesce", 0, 0); | |
2223 | ||
2224 | /* | |
2225 | * And finally, call the kernel passing it the flattened device | |
2226 | * tree and NULL as r5, thus triggering the new entry point which | |
2227 | * is common to us and kexec | |
2228 | */ | |
2229 | hdr = RELOC(dt_header_start); | |
2230 | prom_printf("returning from prom_init\n"); | |
2231 | prom_debug("->dt_header_start=0x%x\n", hdr); | |
2232 | ||
2233 | #ifdef CONFIG_PPC32 | |
2234 | reloc_got2(-offset); | |
2235 | #endif | |
2236 | ||
35499c01 | 2237 | __start(hdr, KERNELBASE + offset, 0); |
9b6b563c PM |
2238 | |
2239 | return 0; | |
2240 | } |