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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 | /* | |
f709bfac PM |
639 | * There are two methods for telling firmware what our capabilities are. |
640 | * Newer machines have an "ibm,client-architecture-support" method on the | |
641 | * root node. For older machines, we have to call the "process-elf-header" | |
642 | * method in the /packages/elf-loader node, passing it a fake 32-bit | |
643 | * ELF header containing a couple of PT_NOTE sections that contain | |
644 | * structures that contain various information. | |
9b6b563c | 645 | */ |
f709bfac PM |
646 | |
647 | /* | |
648 | * New method - extensible architecture description vector. | |
649 | * | |
650 | * Because the description vector contains a mix of byte and word | |
651 | * values, we declare it as an unsigned char array, and use this | |
652 | * macro to put word values in. | |
653 | */ | |
654 | #define W(x) ((x) >> 24) & 0xff, ((x) >> 16) & 0xff, \ | |
655 | ((x) >> 8) & 0xff, (x) & 0xff | |
656 | ||
657 | /* Option vector bits - generic bits in byte 1 */ | |
658 | #define OV_IGNORE 0x80 /* ignore this vector */ | |
659 | #define OV_CESSATION_POLICY 0x40 /* halt if unsupported option present*/ | |
660 | ||
661 | /* Option vector 1: processor architectures supported */ | |
662 | #define OV1_PPC_2_00 0x80 /* set if we support PowerPC 2.00 */ | |
663 | #define OV1_PPC_2_01 0x40 /* set if we support PowerPC 2.01 */ | |
664 | #define OV1_PPC_2_02 0x20 /* set if we support PowerPC 2.02 */ | |
665 | #define OV1_PPC_2_03 0x10 /* set if we support PowerPC 2.03 */ | |
666 | #define OV1_PPC_2_04 0x08 /* set if we support PowerPC 2.04 */ | |
667 | #define OV1_PPC_2_05 0x04 /* set if we support PowerPC 2.05 */ | |
668 | ||
669 | /* Option vector 2: Open Firmware options supported */ | |
670 | #define OV2_REAL_MODE 0x20 /* set if we want OF in real mode */ | |
671 | ||
672 | /* Option vector 3: processor options supported */ | |
673 | #define OV3_FP 0x80 /* floating point */ | |
674 | #define OV3_VMX 0x40 /* VMX/Altivec */ | |
675 | ||
676 | /* Option vector 5: PAPR/OF options supported */ | |
677 | #define OV5_LPAR 0x80 /* logical partitioning supported */ | |
678 | #define OV5_SPLPAR 0x40 /* shared-processor LPAR supported */ | |
679 | /* ibm,dynamic-reconfiguration-memory property supported */ | |
680 | #define OV5_DRCONF_MEMORY 0x20 | |
681 | #define OV5_LARGE_PAGES 0x10 /* large pages supported */ | |
682 | ||
683 | /* | |
684 | * The architecture vector has an array of PVR mask/value pairs, | |
685 | * followed by # option vectors - 1, followed by the option vectors. | |
686 | */ | |
687 | static unsigned char ibm_architecture_vec[] = { | |
688 | W(0xfffe0000), W(0x003a0000), /* POWER5/POWER5+ */ | |
03054d51 | 689 | W(0xffff0000), W(0x003e0000), /* POWER6 */ |
f709bfac PM |
690 | W(0xfffffffe), W(0x0f000001), /* all 2.04-compliant and earlier */ |
691 | 5 - 1, /* 5 option vectors */ | |
692 | ||
693 | /* option vector 1: processor architectures supported */ | |
694 | 3 - 1, /* length */ | |
695 | 0, /* don't ignore, don't halt */ | |
696 | OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 | | |
697 | OV1_PPC_2_04 | OV1_PPC_2_05, | |
698 | ||
699 | /* option vector 2: Open Firmware options supported */ | |
700 | 34 - 1, /* length */ | |
701 | OV2_REAL_MODE, | |
702 | 0, 0, | |
703 | W(0xffffffff), /* real_base */ | |
704 | W(0xffffffff), /* real_size */ | |
705 | W(0xffffffff), /* virt_base */ | |
706 | W(0xffffffff), /* virt_size */ | |
707 | W(0xffffffff), /* load_base */ | |
708 | W(64), /* 128MB min RMA */ | |
709 | W(0xffffffff), /* full client load */ | |
710 | 0, /* min RMA percentage of total RAM */ | |
711 | 48, /* max log_2(hash table size) */ | |
712 | ||
713 | /* option vector 3: processor options supported */ | |
714 | 3 - 1, /* length */ | |
715 | 0, /* don't ignore, don't halt */ | |
716 | OV3_FP | OV3_VMX, | |
717 | ||
718 | /* option vector 4: IBM PAPR implementation */ | |
719 | 2 - 1, /* length */ | |
720 | 0, /* don't halt */ | |
721 | ||
722 | /* option vector 5: PAPR/OF options */ | |
723 | 3 - 1, /* length */ | |
724 | 0, /* don't ignore, don't halt */ | |
725 | OV5_LPAR | OV5_SPLPAR | OV5_LARGE_PAGES, | |
726 | }; | |
727 | ||
728 | /* Old method - ELF header with PT_NOTE sections */ | |
9b6b563c PM |
729 | static struct fake_elf { |
730 | Elf32_Ehdr elfhdr; | |
731 | Elf32_Phdr phdr[2]; | |
732 | struct chrpnote { | |
733 | u32 namesz; | |
734 | u32 descsz; | |
735 | u32 type; | |
736 | char name[8]; /* "PowerPC" */ | |
737 | struct chrpdesc { | |
738 | u32 real_mode; | |
739 | u32 real_base; | |
740 | u32 real_size; | |
741 | u32 virt_base; | |
742 | u32 virt_size; | |
743 | u32 load_base; | |
744 | } chrpdesc; | |
745 | } chrpnote; | |
746 | struct rpanote { | |
747 | u32 namesz; | |
748 | u32 descsz; | |
749 | u32 type; | |
750 | char name[24]; /* "IBM,RPA-Client-Config" */ | |
751 | struct rpadesc { | |
752 | u32 lpar_affinity; | |
753 | u32 min_rmo_size; | |
754 | u32 min_rmo_percent; | |
755 | u32 max_pft_size; | |
756 | u32 splpar; | |
757 | u32 min_load; | |
758 | u32 new_mem_def; | |
759 | u32 ignore_me; | |
760 | } rpadesc; | |
761 | } rpanote; | |
762 | } fake_elf = { | |
763 | .elfhdr = { | |
764 | .e_ident = { 0x7f, 'E', 'L', 'F', | |
765 | ELFCLASS32, ELFDATA2MSB, EV_CURRENT }, | |
766 | .e_type = ET_EXEC, /* yeah right */ | |
767 | .e_machine = EM_PPC, | |
768 | .e_version = EV_CURRENT, | |
769 | .e_phoff = offsetof(struct fake_elf, phdr), | |
770 | .e_phentsize = sizeof(Elf32_Phdr), | |
771 | .e_phnum = 2 | |
772 | }, | |
773 | .phdr = { | |
774 | [0] = { | |
775 | .p_type = PT_NOTE, | |
776 | .p_offset = offsetof(struct fake_elf, chrpnote), | |
777 | .p_filesz = sizeof(struct chrpnote) | |
778 | }, [1] = { | |
779 | .p_type = PT_NOTE, | |
780 | .p_offset = offsetof(struct fake_elf, rpanote), | |
781 | .p_filesz = sizeof(struct rpanote) | |
782 | } | |
783 | }, | |
784 | .chrpnote = { | |
785 | .namesz = sizeof("PowerPC"), | |
786 | .descsz = sizeof(struct chrpdesc), | |
787 | .type = 0x1275, | |
788 | .name = "PowerPC", | |
789 | .chrpdesc = { | |
790 | .real_mode = ~0U, /* ~0 means "don't care" */ | |
791 | .real_base = ~0U, | |
792 | .real_size = ~0U, | |
793 | .virt_base = ~0U, | |
794 | .virt_size = ~0U, | |
795 | .load_base = ~0U | |
796 | }, | |
797 | }, | |
798 | .rpanote = { | |
799 | .namesz = sizeof("IBM,RPA-Client-Config"), | |
800 | .descsz = sizeof(struct rpadesc), | |
801 | .type = 0x12759999, | |
802 | .name = "IBM,RPA-Client-Config", | |
803 | .rpadesc = { | |
804 | .lpar_affinity = 0, | |
805 | .min_rmo_size = 64, /* in megabytes */ | |
806 | .min_rmo_percent = 0, | |
807 | .max_pft_size = 48, /* 2^48 bytes max PFT size */ | |
808 | .splpar = 1, | |
809 | .min_load = ~0U, | |
810 | .new_mem_def = 0 | |
811 | } | |
812 | } | |
813 | }; | |
814 | ||
815 | static void __init prom_send_capabilities(void) | |
816 | { | |
f709bfac PM |
817 | ihandle elfloader, root; |
818 | prom_arg_t ret; | |
819 | ||
820 | root = call_prom("open", 1, 1, ADDR("/")); | |
821 | if (root != 0) { | |
822 | /* try calling the ibm,client-architecture-support method */ | |
823 | if (call_prom_ret("call-method", 3, 2, &ret, | |
824 | ADDR("ibm,client-architecture-support"), | |
825 | ADDR(ibm_architecture_vec)) == 0) { | |
826 | /* the call exists... */ | |
827 | if (ret) | |
828 | prom_printf("WARNING: ibm,client-architecture" | |
829 | "-support call FAILED!\n"); | |
830 | call_prom("close", 1, 0, root); | |
831 | return; | |
832 | } | |
833 | call_prom("close", 1, 0, root); | |
834 | } | |
9b6b563c | 835 | |
f709bfac | 836 | /* no ibm,client-architecture-support call, try the old way */ |
9b6b563c PM |
837 | elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader")); |
838 | if (elfloader == 0) { | |
839 | prom_printf("couldn't open /packages/elf-loader\n"); | |
840 | return; | |
841 | } | |
842 | call_prom("call-method", 3, 1, ADDR("process-elf-header"), | |
843 | elfloader, ADDR(&fake_elf)); | |
844 | call_prom("close", 1, 0, elfloader); | |
845 | } | |
846 | #endif | |
847 | ||
848 | /* | |
849 | * Memory allocation strategy... our layout is normally: | |
850 | * | |
851 | * at 14Mb or more we have vmlinux, then a gap and initrd. In some | |
852 | * rare cases, initrd might end up being before the kernel though. | |
853 | * We assume this won't override the final kernel at 0, we have no | |
854 | * provision to handle that in this version, but it should hopefully | |
855 | * never happen. | |
856 | * | |
857 | * alloc_top is set to the top of RMO, eventually shrink down if the | |
858 | * TCEs overlap | |
859 | * | |
860 | * alloc_bottom is set to the top of kernel/initrd | |
861 | * | |
862 | * from there, allocations are done this way : rtas is allocated | |
863 | * topmost, and the device-tree is allocated from the bottom. We try | |
864 | * to grow the device-tree allocation as we progress. If we can't, | |
865 | * then we fail, we don't currently have a facility to restart | |
866 | * elsewhere, but that shouldn't be necessary. | |
867 | * | |
868 | * Note that calls to reserve_mem have to be done explicitly, memory | |
869 | * allocated with either alloc_up or alloc_down isn't automatically | |
870 | * reserved. | |
871 | */ | |
872 | ||
873 | ||
874 | /* | |
875 | * Allocates memory in the RMO upward from the kernel/initrd | |
876 | * | |
877 | * When align is 0, this is a special case, it means to allocate in place | |
878 | * at the current location of alloc_bottom or fail (that is basically | |
879 | * extending the previous allocation). Used for the device-tree flattening | |
880 | */ | |
881 | static unsigned long __init alloc_up(unsigned long size, unsigned long align) | |
882 | { | |
c4988820 | 883 | unsigned long base = RELOC(alloc_bottom); |
9b6b563c PM |
884 | unsigned long addr = 0; |
885 | ||
c4988820 PM |
886 | if (align) |
887 | base = _ALIGN_UP(base, align); | |
9b6b563c PM |
888 | prom_debug("alloc_up(%x, %x)\n", size, align); |
889 | if (RELOC(ram_top) == 0) | |
890 | prom_panic("alloc_up() called with mem not initialized\n"); | |
891 | ||
892 | if (align) | |
893 | base = _ALIGN_UP(RELOC(alloc_bottom), align); | |
894 | else | |
895 | base = RELOC(alloc_bottom); | |
896 | ||
897 | for(; (base + size) <= RELOC(alloc_top); | |
898 | base = _ALIGN_UP(base + 0x100000, align)) { | |
899 | prom_debug(" trying: 0x%x\n\r", base); | |
900 | addr = (unsigned long)prom_claim(base, size, 0); | |
c4988820 | 901 | if (addr != PROM_ERROR && addr != 0) |
9b6b563c PM |
902 | break; |
903 | addr = 0; | |
904 | if (align == 0) | |
905 | break; | |
906 | } | |
907 | if (addr == 0) | |
908 | return 0; | |
909 | RELOC(alloc_bottom) = addr; | |
910 | ||
911 | prom_debug(" -> %x\n", addr); | |
912 | prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom)); | |
913 | prom_debug(" alloc_top : %x\n", RELOC(alloc_top)); | |
914 | prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); | |
915 | prom_debug(" rmo_top : %x\n", RELOC(rmo_top)); | |
916 | prom_debug(" ram_top : %x\n", RELOC(ram_top)); | |
917 | ||
918 | return addr; | |
919 | } | |
920 | ||
921 | /* | |
922 | * Allocates memory downward, either from top of RMO, or if highmem | |
923 | * is set, from the top of RAM. Note that this one doesn't handle | |
924 | * failures. It does claim memory if highmem is not set. | |
925 | */ | |
926 | static unsigned long __init alloc_down(unsigned long size, unsigned long align, | |
927 | int highmem) | |
928 | { | |
929 | unsigned long base, addr = 0; | |
930 | ||
931 | prom_debug("alloc_down(%x, %x, %s)\n", size, align, | |
932 | highmem ? RELOC("(high)") : RELOC("(low)")); | |
933 | if (RELOC(ram_top) == 0) | |
934 | prom_panic("alloc_down() called with mem not initialized\n"); | |
935 | ||
936 | if (highmem) { | |
937 | /* Carve out storage for the TCE table. */ | |
938 | addr = _ALIGN_DOWN(RELOC(alloc_top_high) - size, align); | |
939 | if (addr <= RELOC(alloc_bottom)) | |
940 | return 0; | |
941 | /* Will we bump into the RMO ? If yes, check out that we | |
942 | * didn't overlap existing allocations there, if we did, | |
943 | * we are dead, we must be the first in town ! | |
944 | */ | |
945 | if (addr < RELOC(rmo_top)) { | |
946 | /* Good, we are first */ | |
947 | if (RELOC(alloc_top) == RELOC(rmo_top)) | |
948 | RELOC(alloc_top) = RELOC(rmo_top) = addr; | |
949 | else | |
950 | return 0; | |
951 | } | |
952 | RELOC(alloc_top_high) = addr; | |
953 | goto bail; | |
954 | } | |
955 | ||
956 | base = _ALIGN_DOWN(RELOC(alloc_top) - size, align); | |
957 | for (; base > RELOC(alloc_bottom); | |
958 | base = _ALIGN_DOWN(base - 0x100000, align)) { | |
959 | prom_debug(" trying: 0x%x\n\r", base); | |
960 | addr = (unsigned long)prom_claim(base, size, 0); | |
c4988820 | 961 | if (addr != PROM_ERROR && addr != 0) |
9b6b563c PM |
962 | break; |
963 | addr = 0; | |
964 | } | |
965 | if (addr == 0) | |
966 | return 0; | |
967 | RELOC(alloc_top) = addr; | |
968 | ||
969 | bail: | |
970 | prom_debug(" -> %x\n", addr); | |
971 | prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom)); | |
972 | prom_debug(" alloc_top : %x\n", RELOC(alloc_top)); | |
973 | prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); | |
974 | prom_debug(" rmo_top : %x\n", RELOC(rmo_top)); | |
975 | prom_debug(" ram_top : %x\n", RELOC(ram_top)); | |
976 | ||
977 | return addr; | |
978 | } | |
979 | ||
980 | /* | |
981 | * Parse a "reg" cell | |
982 | */ | |
983 | static unsigned long __init prom_next_cell(int s, cell_t **cellp) | |
984 | { | |
985 | cell_t *p = *cellp; | |
986 | unsigned long r = 0; | |
987 | ||
988 | /* Ignore more than 2 cells */ | |
989 | while (s > sizeof(unsigned long) / 4) { | |
990 | p++; | |
991 | s--; | |
992 | } | |
993 | r = *p++; | |
994 | #ifdef CONFIG_PPC64 | |
35499c01 | 995 | if (s > 1) { |
9b6b563c PM |
996 | r <<= 32; |
997 | r |= *(p++); | |
998 | } | |
999 | #endif | |
1000 | *cellp = p; | |
1001 | return r; | |
1002 | } | |
1003 | ||
1004 | /* | |
1005 | * Very dumb function for adding to the memory reserve list, but | |
1006 | * we don't need anything smarter at this point | |
1007 | * | |
1008 | * XXX Eventually check for collisions. They should NEVER happen. | |
1009 | * If problems seem to show up, it would be a good start to track | |
1010 | * them down. | |
1011 | */ | |
cbbcf340 | 1012 | static void reserve_mem(u64 base, u64 size) |
9b6b563c | 1013 | { |
cbbcf340 | 1014 | u64 top = base + size; |
9b6b563c PM |
1015 | unsigned long cnt = RELOC(mem_reserve_cnt); |
1016 | ||
1017 | if (size == 0) | |
1018 | return; | |
1019 | ||
1020 | /* We need to always keep one empty entry so that we | |
1021 | * have our terminator with "size" set to 0 since we are | |
1022 | * dumb and just copy this entire array to the boot params | |
1023 | */ | |
1024 | base = _ALIGN_DOWN(base, PAGE_SIZE); | |
1025 | top = _ALIGN_UP(top, PAGE_SIZE); | |
1026 | size = top - base; | |
1027 | ||
1028 | if (cnt >= (MEM_RESERVE_MAP_SIZE - 1)) | |
1029 | prom_panic("Memory reserve map exhausted !\n"); | |
1030 | RELOC(mem_reserve_map)[cnt].base = base; | |
1031 | RELOC(mem_reserve_map)[cnt].size = size; | |
1032 | RELOC(mem_reserve_cnt) = cnt + 1; | |
1033 | } | |
1034 | ||
1035 | /* | |
1036 | * Initialize memory allocation mecanism, parse "memory" nodes and | |
1037 | * obtain that way the top of memory and RMO to setup out local allocator | |
1038 | */ | |
1039 | static void __init prom_init_mem(void) | |
1040 | { | |
1041 | phandle node; | |
1042 | char *path, type[64]; | |
1043 | unsigned int plen; | |
1044 | cell_t *p, *endp; | |
1045 | struct prom_t *_prom = &RELOC(prom); | |
1046 | u32 rac, rsc; | |
1047 | ||
1048 | /* | |
1049 | * We iterate the memory nodes to find | |
1050 | * 1) top of RMO (first node) | |
1051 | * 2) top of memory | |
1052 | */ | |
1053 | rac = 2; | |
1054 | prom_getprop(_prom->root, "#address-cells", &rac, sizeof(rac)); | |
1055 | rsc = 1; | |
1056 | prom_getprop(_prom->root, "#size-cells", &rsc, sizeof(rsc)); | |
1057 | prom_debug("root_addr_cells: %x\n", (unsigned long) rac); | |
1058 | prom_debug("root_size_cells: %x\n", (unsigned long) rsc); | |
1059 | ||
1060 | prom_debug("scanning memory:\n"); | |
1061 | path = RELOC(prom_scratch); | |
1062 | ||
1063 | for (node = 0; prom_next_node(&node); ) { | |
1064 | type[0] = 0; | |
1065 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1066 | ||
c4988820 PM |
1067 | if (type[0] == 0) { |
1068 | /* | |
1069 | * CHRP Longtrail machines have no device_type | |
1070 | * on the memory node, so check the name instead... | |
1071 | */ | |
1072 | prom_getprop(node, "name", type, sizeof(type)); | |
1073 | } | |
9b6b563c PM |
1074 | if (strcmp(type, RELOC("memory"))) |
1075 | continue; | |
c4988820 | 1076 | |
9b6b563c PM |
1077 | plen = prom_getprop(node, "reg", RELOC(regbuf), sizeof(regbuf)); |
1078 | if (plen > sizeof(regbuf)) { | |
1079 | prom_printf("memory node too large for buffer !\n"); | |
1080 | plen = sizeof(regbuf); | |
1081 | } | |
1082 | p = RELOC(regbuf); | |
1083 | endp = p + (plen / sizeof(cell_t)); | |
1084 | ||
1085 | #ifdef DEBUG_PROM | |
1086 | memset(path, 0, PROM_SCRATCH_SIZE); | |
1087 | call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); | |
1088 | prom_debug(" node %s :\n", path); | |
1089 | #endif /* DEBUG_PROM */ | |
1090 | ||
1091 | while ((endp - p) >= (rac + rsc)) { | |
1092 | unsigned long base, size; | |
1093 | ||
1094 | base = prom_next_cell(rac, &p); | |
1095 | size = prom_next_cell(rsc, &p); | |
1096 | ||
1097 | if (size == 0) | |
1098 | continue; | |
1099 | prom_debug(" %x %x\n", base, size); | |
ab1b55e2 | 1100 | if (base == 0 && (RELOC(of_platform) & PLATFORM_LPAR)) |
9b6b563c PM |
1101 | RELOC(rmo_top) = size; |
1102 | if ((base + size) > RELOC(ram_top)) | |
1103 | RELOC(ram_top) = base + size; | |
1104 | } | |
1105 | } | |
1106 | ||
1107 | RELOC(alloc_bottom) = PAGE_ALIGN((unsigned long)&RELOC(_end) + 0x4000); | |
1108 | ||
1109 | /* Check if we have an initrd after the kernel, if we do move our bottom | |
1110 | * point to after it | |
1111 | */ | |
1112 | if (RELOC(prom_initrd_start)) { | |
1113 | if (RELOC(prom_initrd_end) > RELOC(alloc_bottom)) | |
1114 | RELOC(alloc_bottom) = PAGE_ALIGN(RELOC(prom_initrd_end)); | |
1115 | } | |
1116 | ||
1117 | /* | |
1118 | * If prom_memory_limit is set we reduce the upper limits *except* for | |
1119 | * alloc_top_high. This must be the real top of RAM so we can put | |
1120 | * TCE's up there. | |
1121 | */ | |
1122 | ||
1123 | RELOC(alloc_top_high) = RELOC(ram_top); | |
1124 | ||
1125 | if (RELOC(prom_memory_limit)) { | |
1126 | if (RELOC(prom_memory_limit) <= RELOC(alloc_bottom)) { | |
1127 | prom_printf("Ignoring mem=%x <= alloc_bottom.\n", | |
1128 | RELOC(prom_memory_limit)); | |
1129 | RELOC(prom_memory_limit) = 0; | |
1130 | } else if (RELOC(prom_memory_limit) >= RELOC(ram_top)) { | |
1131 | prom_printf("Ignoring mem=%x >= ram_top.\n", | |
1132 | RELOC(prom_memory_limit)); | |
1133 | RELOC(prom_memory_limit) = 0; | |
1134 | } else { | |
1135 | RELOC(ram_top) = RELOC(prom_memory_limit); | |
1136 | RELOC(rmo_top) = min(RELOC(rmo_top), RELOC(prom_memory_limit)); | |
1137 | } | |
1138 | } | |
1139 | ||
1140 | /* | |
1141 | * Setup our top alloc point, that is top of RMO or top of | |
1142 | * segment 0 when running non-LPAR. | |
1143 | * Some RS64 machines have buggy firmware where claims up at | |
1144 | * 1GB fail. Cap at 768MB as a workaround. | |
1145 | * Since 768MB is plenty of room, and we need to cap to something | |
1146 | * reasonable on 32-bit, cap at 768MB on all machines. | |
1147 | */ | |
1148 | if (!RELOC(rmo_top)) | |
1149 | RELOC(rmo_top) = RELOC(ram_top); | |
1150 | RELOC(rmo_top) = min(0x30000000ul, RELOC(rmo_top)); | |
1151 | RELOC(alloc_top) = RELOC(rmo_top); | |
1152 | ||
1153 | prom_printf("memory layout at init:\n"); | |
1154 | prom_printf(" memory_limit : %x (16 MB aligned)\n", RELOC(prom_memory_limit)); | |
1155 | prom_printf(" alloc_bottom : %x\n", RELOC(alloc_bottom)); | |
1156 | prom_printf(" alloc_top : %x\n", RELOC(alloc_top)); | |
1157 | prom_printf(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); | |
1158 | prom_printf(" rmo_top : %x\n", RELOC(rmo_top)); | |
1159 | prom_printf(" ram_top : %x\n", RELOC(ram_top)); | |
dcee3036 ME |
1160 | #ifdef CONFIG_KEXEC |
1161 | if (RELOC(prom_crashk_base)) { | |
1162 | prom_printf(" crashk_base : %x\n", RELOC(prom_crashk_base)); | |
1163 | prom_printf(" crashk_size : %x\n", RELOC(prom_crashk_size)); | |
1164 | } | |
1165 | #endif | |
9b6b563c PM |
1166 | } |
1167 | ||
1168 | ||
1169 | /* | |
1170 | * Allocate room for and instantiate RTAS | |
1171 | */ | |
1172 | static void __init prom_instantiate_rtas(void) | |
1173 | { | |
1174 | phandle rtas_node; | |
1175 | ihandle rtas_inst; | |
1176 | u32 base, entry = 0; | |
1177 | u32 size = 0; | |
1178 | ||
1179 | prom_debug("prom_instantiate_rtas: start...\n"); | |
1180 | ||
1181 | rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas")); | |
1182 | prom_debug("rtas_node: %x\n", rtas_node); | |
1183 | if (!PHANDLE_VALID(rtas_node)) | |
1184 | return; | |
1185 | ||
1186 | prom_getprop(rtas_node, "rtas-size", &size, sizeof(size)); | |
1187 | if (size == 0) | |
1188 | return; | |
1189 | ||
1190 | base = alloc_down(size, PAGE_SIZE, 0); | |
1191 | if (base == 0) { | |
1192 | prom_printf("RTAS allocation failed !\n"); | |
1193 | return; | |
1194 | } | |
1195 | ||
1196 | rtas_inst = call_prom("open", 1, 1, ADDR("/rtas")); | |
1197 | if (!IHANDLE_VALID(rtas_inst)) { | |
a23414be | 1198 | prom_printf("opening rtas package failed (%x)\n", rtas_inst); |
9b6b563c PM |
1199 | return; |
1200 | } | |
1201 | ||
1202 | prom_printf("instantiating rtas at 0x%x ...", base); | |
1203 | ||
1204 | if (call_prom_ret("call-method", 3, 2, &entry, | |
1205 | ADDR("instantiate-rtas"), | |
a23414be | 1206 | rtas_inst, base) != 0 |
9b6b563c PM |
1207 | || entry == 0) { |
1208 | prom_printf(" failed\n"); | |
1209 | return; | |
1210 | } | |
1211 | prom_printf(" done\n"); | |
1212 | ||
1213 | reserve_mem(base, size); | |
1214 | ||
a23414be PM |
1215 | prom_setprop(rtas_node, "/rtas", "linux,rtas-base", |
1216 | &base, sizeof(base)); | |
1217 | prom_setprop(rtas_node, "/rtas", "linux,rtas-entry", | |
1218 | &entry, sizeof(entry)); | |
9b6b563c PM |
1219 | |
1220 | prom_debug("rtas base = 0x%x\n", base); | |
1221 | prom_debug("rtas entry = 0x%x\n", entry); | |
1222 | prom_debug("rtas size = 0x%x\n", (long)size); | |
1223 | ||
1224 | prom_debug("prom_instantiate_rtas: end...\n"); | |
1225 | } | |
1226 | ||
1227 | #ifdef CONFIG_PPC64 | |
1228 | /* | |
1229 | * Allocate room for and initialize TCE tables | |
1230 | */ | |
1231 | static void __init prom_initialize_tce_table(void) | |
1232 | { | |
1233 | phandle node; | |
1234 | ihandle phb_node; | |
1235 | char compatible[64], type[64], model[64]; | |
1236 | char *path = RELOC(prom_scratch); | |
1237 | u64 base, align; | |
1238 | u32 minalign, minsize; | |
1239 | u64 tce_entry, *tce_entryp; | |
1240 | u64 local_alloc_top, local_alloc_bottom; | |
1241 | u64 i; | |
1242 | ||
1243 | if (RELOC(ppc64_iommu_off)) | |
1244 | return; | |
1245 | ||
1246 | prom_debug("starting prom_initialize_tce_table\n"); | |
1247 | ||
1248 | /* Cache current top of allocs so we reserve a single block */ | |
1249 | local_alloc_top = RELOC(alloc_top_high); | |
1250 | local_alloc_bottom = local_alloc_top; | |
1251 | ||
1252 | /* Search all nodes looking for PHBs. */ | |
1253 | for (node = 0; prom_next_node(&node); ) { | |
1254 | compatible[0] = 0; | |
1255 | type[0] = 0; | |
1256 | model[0] = 0; | |
1257 | prom_getprop(node, "compatible", | |
1258 | compatible, sizeof(compatible)); | |
1259 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1260 | prom_getprop(node, "model", model, sizeof(model)); | |
1261 | ||
1262 | if ((type[0] == 0) || (strstr(type, RELOC("pci")) == NULL)) | |
1263 | continue; | |
1264 | ||
1265 | /* Keep the old logic in tack to avoid regression. */ | |
1266 | if (compatible[0] != 0) { | |
1267 | if ((strstr(compatible, RELOC("python")) == NULL) && | |
1268 | (strstr(compatible, RELOC("Speedwagon")) == NULL) && | |
1269 | (strstr(compatible, RELOC("Winnipeg")) == NULL)) | |
1270 | continue; | |
1271 | } else if (model[0] != 0) { | |
1272 | if ((strstr(model, RELOC("ython")) == NULL) && | |
1273 | (strstr(model, RELOC("peedwagon")) == NULL) && | |
1274 | (strstr(model, RELOC("innipeg")) == NULL)) | |
1275 | continue; | |
1276 | } | |
1277 | ||
1278 | if (prom_getprop(node, "tce-table-minalign", &minalign, | |
1279 | sizeof(minalign)) == PROM_ERROR) | |
1280 | minalign = 0; | |
1281 | if (prom_getprop(node, "tce-table-minsize", &minsize, | |
1282 | sizeof(minsize)) == PROM_ERROR) | |
1283 | minsize = 4UL << 20; | |
1284 | ||
1285 | /* | |
1286 | * Even though we read what OF wants, we just set the table | |
1287 | * size to 4 MB. This is enough to map 2GB of PCI DMA space. | |
1288 | * By doing this, we avoid the pitfalls of trying to DMA to | |
1289 | * MMIO space and the DMA alias hole. | |
1290 | * | |
1291 | * On POWER4, firmware sets the TCE region by assuming | |
1292 | * each TCE table is 8MB. Using this memory for anything | |
1293 | * else will impact performance, so we always allocate 8MB. | |
1294 | * Anton | |
1295 | */ | |
1296 | if (__is_processor(PV_POWER4) || __is_processor(PV_POWER4p)) | |
1297 | minsize = 8UL << 20; | |
1298 | else | |
1299 | minsize = 4UL << 20; | |
1300 | ||
1301 | /* Align to the greater of the align or size */ | |
1302 | align = max(minalign, minsize); | |
1303 | base = alloc_down(minsize, align, 1); | |
1304 | if (base == 0) | |
1305 | prom_panic("ERROR, cannot find space for TCE table.\n"); | |
1306 | if (base < local_alloc_bottom) | |
1307 | local_alloc_bottom = base; | |
1308 | ||
9b6b563c PM |
1309 | /* It seems OF doesn't null-terminate the path :-( */ |
1310 | memset(path, 0, sizeof(path)); | |
1311 | /* Call OF to setup the TCE hardware */ | |
1312 | if (call_prom("package-to-path", 3, 1, node, | |
1313 | path, PROM_SCRATCH_SIZE-1) == PROM_ERROR) { | |
1314 | prom_printf("package-to-path failed\n"); | |
1315 | } | |
1316 | ||
a23414be PM |
1317 | /* Save away the TCE table attributes for later use. */ |
1318 | prom_setprop(node, path, "linux,tce-base", &base, sizeof(base)); | |
1319 | prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize)); | |
1320 | ||
9b6b563c PM |
1321 | prom_debug("TCE table: %s\n", path); |
1322 | prom_debug("\tnode = 0x%x\n", node); | |
1323 | prom_debug("\tbase = 0x%x\n", base); | |
1324 | prom_debug("\tsize = 0x%x\n", minsize); | |
1325 | ||
1326 | /* Initialize the table to have a one-to-one mapping | |
1327 | * over the allocated size. | |
1328 | */ | |
1329 | tce_entryp = (unsigned long *)base; | |
1330 | for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) { | |
1331 | tce_entry = (i << PAGE_SHIFT); | |
1332 | tce_entry |= 0x3; | |
1333 | *tce_entryp = tce_entry; | |
1334 | } | |
1335 | ||
1336 | prom_printf("opening PHB %s", path); | |
1337 | phb_node = call_prom("open", 1, 1, path); | |
1338 | if (phb_node == 0) | |
1339 | prom_printf("... failed\n"); | |
1340 | else | |
1341 | prom_printf("... done\n"); | |
1342 | ||
1343 | call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"), | |
1344 | phb_node, -1, minsize, | |
1345 | (u32) base, (u32) (base >> 32)); | |
1346 | call_prom("close", 1, 0, phb_node); | |
1347 | } | |
1348 | ||
1349 | reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom); | |
1350 | ||
1351 | if (RELOC(prom_memory_limit)) { | |
1352 | /* | |
1353 | * We align the start to a 16MB boundary so we can map | |
1354 | * the TCE area using large pages if possible. | |
1355 | * The end should be the top of RAM so no need to align it. | |
1356 | */ | |
1357 | RELOC(prom_tce_alloc_start) = _ALIGN_DOWN(local_alloc_bottom, | |
1358 | 0x1000000); | |
1359 | RELOC(prom_tce_alloc_end) = local_alloc_top; | |
1360 | } | |
1361 | ||
1362 | /* Flag the first invalid entry */ | |
1363 | prom_debug("ending prom_initialize_tce_table\n"); | |
1364 | } | |
1365 | #endif | |
1366 | ||
1367 | /* | |
1368 | * With CHRP SMP we need to use the OF to start the other processors. | |
1369 | * We can't wait until smp_boot_cpus (the OF is trashed by then) | |
1370 | * so we have to put the processors into a holding pattern controlled | |
1371 | * by the kernel (not OF) before we destroy the OF. | |
1372 | * | |
1373 | * This uses a chunk of low memory, puts some holding pattern | |
1374 | * code there and sends the other processors off to there until | |
1375 | * smp_boot_cpus tells them to do something. The holding pattern | |
1376 | * checks that address until its cpu # is there, when it is that | |
1377 | * cpu jumps to __secondary_start(). smp_boot_cpus() takes care | |
1378 | * of setting those values. | |
1379 | * | |
1380 | * We also use physical address 0x4 here to tell when a cpu | |
1381 | * is in its holding pattern code. | |
1382 | * | |
1383 | * -- Cort | |
1384 | */ | |
bbd0abda PM |
1385 | extern void __secondary_hold(void); |
1386 | extern unsigned long __secondary_hold_spinloop; | |
1387 | extern unsigned long __secondary_hold_acknowledge; | |
1388 | ||
1389 | /* | |
1390 | * We want to reference the copy of __secondary_hold_* in the | |
1391 | * 0 - 0x100 address range | |
1392 | */ | |
1393 | #define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff) | |
1394 | ||
9b6b563c PM |
1395 | static void __init prom_hold_cpus(void) |
1396 | { | |
9b6b563c PM |
1397 | unsigned long i; |
1398 | unsigned int reg; | |
1399 | phandle node; | |
1400 | char type[64]; | |
1401 | int cpuid = 0; | |
1402 | unsigned int interrupt_server[MAX_CPU_THREADS]; | |
1403 | unsigned int cpu_threads, hw_cpu_num; | |
1404 | int propsize; | |
bbd0abda | 1405 | struct prom_t *_prom = &RELOC(prom); |
9b6b563c | 1406 | unsigned long *spinloop |
bbd0abda | 1407 | = (void *) LOW_ADDR(__secondary_hold_spinloop); |
9b6b563c | 1408 | unsigned long *acknowledge |
bbd0abda | 1409 | = (void *) LOW_ADDR(__secondary_hold_acknowledge); |
9b6b563c | 1410 | #ifdef CONFIG_PPC64 |
bbd0abda | 1411 | /* __secondary_hold is actually a descriptor, not the text address */ |
9b6b563c PM |
1412 | unsigned long secondary_hold |
1413 | = __pa(*PTRRELOC((unsigned long *)__secondary_hold)); | |
1414 | #else | |
bbd0abda | 1415 | unsigned long secondary_hold = LOW_ADDR(__secondary_hold); |
9b6b563c | 1416 | #endif |
9b6b563c PM |
1417 | |
1418 | prom_debug("prom_hold_cpus: start...\n"); | |
1419 | prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop); | |
1420 | prom_debug(" 1) *spinloop = 0x%x\n", *spinloop); | |
1421 | prom_debug(" 1) acknowledge = 0x%x\n", | |
1422 | (unsigned long)acknowledge); | |
1423 | prom_debug(" 1) *acknowledge = 0x%x\n", *acknowledge); | |
1424 | prom_debug(" 1) secondary_hold = 0x%x\n", secondary_hold); | |
1425 | ||
1426 | /* Set the common spinloop variable, so all of the secondary cpus | |
1427 | * will block when they are awakened from their OF spinloop. | |
1428 | * This must occur for both SMP and non SMP kernels, since OF will | |
1429 | * be trashed when we move the kernel. | |
1430 | */ | |
1431 | *spinloop = 0; | |
1432 | ||
9b6b563c PM |
1433 | /* look for cpus */ |
1434 | for (node = 0; prom_next_node(&node); ) { | |
1435 | type[0] = 0; | |
1436 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1437 | if (strcmp(type, RELOC("cpu")) != 0) | |
1438 | continue; | |
1439 | ||
1440 | /* Skip non-configured cpus. */ | |
1441 | if (prom_getprop(node, "status", type, sizeof(type)) > 0) | |
1442 | if (strcmp(type, RELOC("okay")) != 0) | |
1443 | continue; | |
1444 | ||
1445 | reg = -1; | |
1446 | prom_getprop(node, "reg", ®, sizeof(reg)); | |
1447 | ||
1448 | prom_debug("\ncpuid = 0x%x\n", cpuid); | |
1449 | prom_debug("cpu hw idx = 0x%x\n", reg); | |
1450 | ||
1451 | /* Init the acknowledge var which will be reset by | |
1452 | * the secondary cpu when it awakens from its OF | |
1453 | * spinloop. | |
1454 | */ | |
1455 | *acknowledge = (unsigned long)-1; | |
1456 | ||
1457 | propsize = prom_getprop(node, "ibm,ppc-interrupt-server#s", | |
1458 | &interrupt_server, | |
1459 | sizeof(interrupt_server)); | |
1460 | if (propsize < 0) { | |
1461 | /* no property. old hardware has no SMT */ | |
1462 | cpu_threads = 1; | |
1463 | interrupt_server[0] = reg; /* fake it with phys id */ | |
1464 | } else { | |
1465 | /* We have a threaded processor */ | |
1466 | cpu_threads = propsize / sizeof(u32); | |
1467 | if (cpu_threads > MAX_CPU_THREADS) { | |
1468 | prom_printf("SMT: too many threads!\n" | |
1469 | "SMT: found %x, max is %x\n", | |
1470 | cpu_threads, MAX_CPU_THREADS); | |
1471 | cpu_threads = 1; /* ToDo: panic? */ | |
1472 | } | |
1473 | } | |
1474 | ||
1475 | hw_cpu_num = interrupt_server[0]; | |
1476 | if (hw_cpu_num != _prom->cpu) { | |
1477 | /* Primary Thread of non-boot cpu */ | |
1478 | prom_printf("%x : starting cpu hw idx %x... ", cpuid, reg); | |
1479 | call_prom("start-cpu", 3, 0, node, | |
1480 | secondary_hold, reg); | |
1481 | ||
bbd0abda PM |
1482 | for (i = 0; (i < 100000000) && |
1483 | (*acknowledge == ((unsigned long)-1)); i++ ) | |
9b6b563c PM |
1484 | mb(); |
1485 | ||
bbd0abda | 1486 | if (*acknowledge == reg) |
9b6b563c | 1487 | prom_printf("done\n"); |
bbd0abda | 1488 | else |
9b6b563c | 1489 | prom_printf("failed: %x\n", *acknowledge); |
9b6b563c PM |
1490 | } |
1491 | #ifdef CONFIG_SMP | |
1492 | else | |
1493 | prom_printf("%x : boot cpu %x\n", cpuid, reg); | |
9b6b563c | 1494 | #endif /* CONFIG_SMP */ |
bbd0abda PM |
1495 | |
1496 | /* Reserve cpu #s for secondary threads. They start later. */ | |
1497 | cpuid += cpu_threads; | |
9b6b563c | 1498 | } |
9b6b563c PM |
1499 | |
1500 | if (cpuid > NR_CPUS) | |
1501 | prom_printf("WARNING: maximum CPUs (" __stringify(NR_CPUS) | |
1502 | ") exceeded: ignoring extras\n"); | |
1503 | ||
1504 | prom_debug("prom_hold_cpus: end...\n"); | |
9b6b563c PM |
1505 | } |
1506 | ||
1507 | ||
1508 | static void __init prom_init_client_services(unsigned long pp) | |
1509 | { | |
1510 | struct prom_t *_prom = &RELOC(prom); | |
1511 | ||
1512 | /* Get a handle to the prom entry point before anything else */ | |
1513 | RELOC(prom_entry) = pp; | |
1514 | ||
1515 | /* get a handle for the stdout device */ | |
1516 | _prom->chosen = call_prom("finddevice", 1, 1, ADDR("/chosen")); | |
1517 | if (!PHANDLE_VALID(_prom->chosen)) | |
1518 | prom_panic("cannot find chosen"); /* msg won't be printed :( */ | |
1519 | ||
1520 | /* get device tree root */ | |
1521 | _prom->root = call_prom("finddevice", 1, 1, ADDR("/")); | |
1522 | if (!PHANDLE_VALID(_prom->root)) | |
1523 | prom_panic("cannot find device tree root"); /* msg won't be printed :( */ | |
a575b807 PM |
1524 | |
1525 | _prom->mmumap = 0; | |
1526 | } | |
1527 | ||
1528 | #ifdef CONFIG_PPC32 | |
1529 | /* | |
1530 | * For really old powermacs, we need to map things we claim. | |
1531 | * For that, we need the ihandle of the mmu. | |
a23414be | 1532 | * Also, on the longtrail, we need to work around other bugs. |
a575b807 PM |
1533 | */ |
1534 | static void __init prom_find_mmu(void) | |
1535 | { | |
1536 | struct prom_t *_prom = &RELOC(prom); | |
1537 | phandle oprom; | |
1538 | char version[64]; | |
1539 | ||
1540 | oprom = call_prom("finddevice", 1, 1, ADDR("/openprom")); | |
1541 | if (!PHANDLE_VALID(oprom)) | |
1542 | return; | |
1543 | if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0) | |
1544 | return; | |
1545 | version[sizeof(version) - 1] = 0; | |
a575b807 | 1546 | /* XXX might need to add other versions here */ |
a23414be PM |
1547 | if (strcmp(version, "Open Firmware, 1.0.5") == 0) |
1548 | of_workarounds = OF_WA_CLAIM; | |
1549 | else if (strncmp(version, "FirmWorks,3.", 12) == 0) { | |
1550 | of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL; | |
1551 | call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim"); | |
1552 | } else | |
a575b807 | 1553 | return; |
a23414be | 1554 | _prom->memory = call_prom("open", 1, 1, ADDR("/memory")); |
a575b807 PM |
1555 | prom_getprop(_prom->chosen, "mmu", &_prom->mmumap, |
1556 | sizeof(_prom->mmumap)); | |
a23414be PM |
1557 | if (!IHANDLE_VALID(_prom->memory) || !IHANDLE_VALID(_prom->mmumap)) |
1558 | of_workarounds &= ~OF_WA_CLAIM; /* hmmm */ | |
9b6b563c | 1559 | } |
a575b807 PM |
1560 | #else |
1561 | #define prom_find_mmu() | |
1562 | #endif | |
9b6b563c PM |
1563 | |
1564 | static void __init prom_init_stdout(void) | |
1565 | { | |
1566 | struct prom_t *_prom = &RELOC(prom); | |
1567 | char *path = RELOC(of_stdout_device); | |
1568 | char type[16]; | |
1569 | u32 val; | |
1570 | ||
1571 | if (prom_getprop(_prom->chosen, "stdout", &val, sizeof(val)) <= 0) | |
1572 | prom_panic("cannot find stdout"); | |
1573 | ||
1574 | _prom->stdout = val; | |
1575 | ||
1576 | /* Get the full OF pathname of the stdout device */ | |
1577 | memset(path, 0, 256); | |
1578 | call_prom("instance-to-path", 3, 1, _prom->stdout, path, 255); | |
1579 | val = call_prom("instance-to-package", 1, 1, _prom->stdout); | |
a23414be PM |
1580 | prom_setprop(_prom->chosen, "/chosen", "linux,stdout-package", |
1581 | &val, sizeof(val)); | |
9b6b563c | 1582 | prom_printf("OF stdout device is: %s\n", RELOC(of_stdout_device)); |
a23414be PM |
1583 | prom_setprop(_prom->chosen, "/chosen", "linux,stdout-path", |
1584 | path, strlen(path) + 1); | |
9b6b563c PM |
1585 | |
1586 | /* If it's a display, note it */ | |
1587 | memset(type, 0, sizeof(type)); | |
1588 | prom_getprop(val, "device_type", type, sizeof(type)); | |
1589 | if (strcmp(type, RELOC("display")) == 0) | |
a23414be | 1590 | prom_setprop(val, path, "linux,boot-display", NULL, 0); |
9b6b563c PM |
1591 | } |
1592 | ||
1593 | static void __init prom_close_stdin(void) | |
1594 | { | |
1595 | struct prom_t *_prom = &RELOC(prom); | |
1596 | ihandle val; | |
1597 | ||
1598 | if (prom_getprop(_prom->chosen, "stdin", &val, sizeof(val)) > 0) | |
1599 | call_prom("close", 1, 0, val); | |
1600 | } | |
1601 | ||
1602 | static int __init prom_find_machine_type(void) | |
1603 | { | |
1604 | struct prom_t *_prom = &RELOC(prom); | |
1605 | char compat[256]; | |
1606 | int len, i = 0; | |
21fe3301 | 1607 | #ifdef CONFIG_PPC64 |
9b6b563c | 1608 | phandle rtas; |
e8222502 | 1609 | int x; |
21fe3301 | 1610 | #endif |
e8222502 BH |
1611 | |
1612 | /* Look for a PowerMac */ | |
9b6b563c PM |
1613 | len = prom_getprop(_prom->root, "compatible", |
1614 | compat, sizeof(compat)-1); | |
1615 | if (len > 0) { | |
1616 | compat[len] = 0; | |
1617 | while (i < len) { | |
1618 | char *p = &compat[i]; | |
1619 | int sl = strlen(p); | |
1620 | if (sl == 0) | |
1621 | break; | |
1622 | if (strstr(p, RELOC("Power Macintosh")) || | |
a575b807 | 1623 | strstr(p, RELOC("MacRISC"))) |
9b6b563c | 1624 | return PLATFORM_POWERMAC; |
9b6b563c PM |
1625 | i += sl + 1; |
1626 | } | |
1627 | } | |
1628 | #ifdef CONFIG_PPC64 | |
e8222502 BH |
1629 | /* If not a mac, try to figure out if it's an IBM pSeries or any other |
1630 | * PAPR compliant platform. We assume it is if : | |
1631 | * - /device_type is "chrp" (please, do NOT use that for future | |
1632 | * non-IBM designs ! | |
1633 | * - it has /rtas | |
1634 | */ | |
6f806cee | 1635 | len = prom_getprop(_prom->root, "device_type", |
e8222502 BH |
1636 | compat, sizeof(compat)-1); |
1637 | if (len <= 0) | |
1638 | return PLATFORM_GENERIC; | |
6f806cee | 1639 | if (strncmp(compat, RELOC("chrp"), 4)) |
e8222502 BH |
1640 | return PLATFORM_GENERIC; |
1641 | ||
9b6b563c PM |
1642 | /* Default to pSeries. We need to know if we are running LPAR */ |
1643 | rtas = call_prom("finddevice", 1, 1, ADDR("/rtas")); | |
e8222502 BH |
1644 | if (!PHANDLE_VALID(rtas)) |
1645 | return PLATFORM_GENERIC; | |
1646 | x = prom_getproplen(rtas, "ibm,hypertas-functions"); | |
1647 | if (x != PROM_ERROR) { | |
1648 | prom_printf("Hypertas detected, assuming LPAR !\n"); | |
1649 | return PLATFORM_PSERIES_LPAR; | |
9b6b563c PM |
1650 | } |
1651 | return PLATFORM_PSERIES; | |
1652 | #else | |
e8222502 | 1653 | return PLATFORM_GENERIC; |
9b6b563c PM |
1654 | #endif |
1655 | } | |
1656 | ||
9b6b563c PM |
1657 | static int __init prom_set_color(ihandle ih, int i, int r, int g, int b) |
1658 | { | |
1659 | return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r); | |
1660 | } | |
1661 | ||
1662 | /* | |
1663 | * If we have a display that we don't know how to drive, | |
1664 | * we will want to try to execute OF's open method for it | |
1665 | * later. However, OF will probably fall over if we do that | |
1666 | * we've taken over the MMU. | |
1667 | * So we check whether we will need to open the display, | |
1668 | * and if so, open it now. | |
1669 | */ | |
1670 | static void __init prom_check_displays(void) | |
1671 | { | |
1672 | char type[16], *path; | |
1673 | phandle node; | |
1674 | ihandle ih; | |
1675 | int i; | |
9b6b563c PM |
1676 | |
1677 | static unsigned char default_colors[] = { | |
1678 | 0x00, 0x00, 0x00, | |
1679 | 0x00, 0x00, 0xaa, | |
1680 | 0x00, 0xaa, 0x00, | |
1681 | 0x00, 0xaa, 0xaa, | |
1682 | 0xaa, 0x00, 0x00, | |
1683 | 0xaa, 0x00, 0xaa, | |
1684 | 0xaa, 0xaa, 0x00, | |
1685 | 0xaa, 0xaa, 0xaa, | |
1686 | 0x55, 0x55, 0x55, | |
1687 | 0x55, 0x55, 0xff, | |
1688 | 0x55, 0xff, 0x55, | |
1689 | 0x55, 0xff, 0xff, | |
1690 | 0xff, 0x55, 0x55, | |
1691 | 0xff, 0x55, 0xff, | |
1692 | 0xff, 0xff, 0x55, | |
1693 | 0xff, 0xff, 0xff | |
1694 | }; | |
1695 | const unsigned char *clut; | |
1696 | ||
1697 | prom_printf("Looking for displays\n"); | |
1698 | for (node = 0; prom_next_node(&node); ) { | |
1699 | memset(type, 0, sizeof(type)); | |
1700 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1701 | if (strcmp(type, RELOC("display")) != 0) | |
1702 | continue; | |
1703 | ||
1704 | /* It seems OF doesn't null-terminate the path :-( */ | |
1705 | path = RELOC(prom_scratch); | |
1706 | memset(path, 0, PROM_SCRATCH_SIZE); | |
1707 | ||
1708 | /* | |
1709 | * leave some room at the end of the path for appending extra | |
1710 | * arguments | |
1711 | */ | |
1712 | if (call_prom("package-to-path", 3, 1, node, path, | |
1713 | PROM_SCRATCH_SIZE-10) == PROM_ERROR) | |
1714 | continue; | |
1715 | prom_printf("found display : %s, opening ... ", path); | |
1716 | ||
1717 | ih = call_prom("open", 1, 1, path); | |
1718 | if (ih == 0) { | |
1719 | prom_printf("failed\n"); | |
1720 | continue; | |
1721 | } | |
1722 | ||
1723 | /* Success */ | |
1724 | prom_printf("done\n"); | |
a23414be | 1725 | prom_setprop(node, path, "linux,opened", NULL, 0); |
9b6b563c PM |
1726 | |
1727 | /* Setup a usable color table when the appropriate | |
1728 | * method is available. Should update this to set-colors */ | |
1729 | clut = RELOC(default_colors); | |
1730 | for (i = 0; i < 32; i++, clut += 3) | |
1731 | if (prom_set_color(ih, i, clut[0], clut[1], | |
1732 | clut[2]) != 0) | |
1733 | break; | |
1734 | ||
1735 | #ifdef CONFIG_LOGO_LINUX_CLUT224 | |
1736 | clut = PTRRELOC(RELOC(logo_linux_clut224.clut)); | |
1737 | for (i = 0; i < RELOC(logo_linux_clut224.clutsize); i++, clut += 3) | |
1738 | if (prom_set_color(ih, i + 32, clut[0], clut[1], | |
1739 | clut[2]) != 0) | |
1740 | break; | |
1741 | #endif /* CONFIG_LOGO_LINUX_CLUT224 */ | |
9b6b563c PM |
1742 | } |
1743 | } | |
1744 | ||
1745 | ||
1746 | /* Return (relocated) pointer to this much memory: moves initrd if reqd. */ | |
1747 | static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end, | |
1748 | unsigned long needed, unsigned long align) | |
1749 | { | |
1750 | void *ret; | |
1751 | ||
1752 | *mem_start = _ALIGN(*mem_start, align); | |
1753 | while ((*mem_start + needed) > *mem_end) { | |
1754 | unsigned long room, chunk; | |
1755 | ||
1756 | prom_debug("Chunk exhausted, claiming more at %x...\n", | |
1757 | RELOC(alloc_bottom)); | |
1758 | room = RELOC(alloc_top) - RELOC(alloc_bottom); | |
1759 | if (room > DEVTREE_CHUNK_SIZE) | |
1760 | room = DEVTREE_CHUNK_SIZE; | |
1761 | if (room < PAGE_SIZE) | |
1762 | prom_panic("No memory for flatten_device_tree (no room)"); | |
1763 | chunk = alloc_up(room, 0); | |
1764 | if (chunk == 0) | |
1765 | prom_panic("No memory for flatten_device_tree (claim failed)"); | |
1766 | *mem_end = RELOC(alloc_top); | |
1767 | } | |
1768 | ||
1769 | ret = (void *)*mem_start; | |
1770 | *mem_start += needed; | |
1771 | ||
1772 | return ret; | |
1773 | } | |
1774 | ||
1775 | #define dt_push_token(token, mem_start, mem_end) \ | |
1776 | do { *((u32 *)make_room(mem_start, mem_end, 4, 4)) = token; } while(0) | |
1777 | ||
1778 | static unsigned long __init dt_find_string(char *str) | |
1779 | { | |
1780 | char *s, *os; | |
1781 | ||
1782 | s = os = (char *)RELOC(dt_string_start); | |
1783 | s += 4; | |
1784 | while (s < (char *)RELOC(dt_string_end)) { | |
1785 | if (strcmp(s, str) == 0) | |
1786 | return s - os; | |
1787 | s += strlen(s) + 1; | |
1788 | } | |
1789 | return 0; | |
1790 | } | |
1791 | ||
1792 | /* | |
1793 | * The Open Firmware 1275 specification states properties must be 31 bytes or | |
1794 | * less, however not all firmwares obey this. Make it 64 bytes to be safe. | |
1795 | */ | |
1796 | #define MAX_PROPERTY_NAME 64 | |
1797 | ||
1798 | static void __init scan_dt_build_strings(phandle node, | |
1799 | unsigned long *mem_start, | |
1800 | unsigned long *mem_end) | |
1801 | { | |
1802 | char *prev_name, *namep, *sstart; | |
1803 | unsigned long soff; | |
1804 | phandle child; | |
1805 | ||
1806 | sstart = (char *)RELOC(dt_string_start); | |
1807 | ||
1808 | /* get and store all property names */ | |
1809 | prev_name = RELOC(""); | |
1810 | for (;;) { | |
1811 | /* 64 is max len of name including nul. */ | |
1812 | namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1); | |
1813 | if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) { | |
1814 | /* No more nodes: unwind alloc */ | |
1815 | *mem_start = (unsigned long)namep; | |
1816 | break; | |
1817 | } | |
1818 | ||
1819 | /* skip "name" */ | |
1820 | if (strcmp(namep, RELOC("name")) == 0) { | |
1821 | *mem_start = (unsigned long)namep; | |
1822 | prev_name = RELOC("name"); | |
1823 | continue; | |
1824 | } | |
1825 | /* get/create string entry */ | |
1826 | soff = dt_find_string(namep); | |
1827 | if (soff != 0) { | |
1828 | *mem_start = (unsigned long)namep; | |
1829 | namep = sstart + soff; | |
1830 | } else { | |
1831 | /* Trim off some if we can */ | |
1832 | *mem_start = (unsigned long)namep + strlen(namep) + 1; | |
1833 | RELOC(dt_string_end) = *mem_start; | |
1834 | } | |
1835 | prev_name = namep; | |
1836 | } | |
1837 | ||
1838 | /* do all our children */ | |
1839 | child = call_prom("child", 1, 1, node); | |
1840 | while (child != 0) { | |
1841 | scan_dt_build_strings(child, mem_start, mem_end); | |
1842 | child = call_prom("peer", 1, 1, child); | |
1843 | } | |
1844 | } | |
1845 | ||
1846 | static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start, | |
1847 | unsigned long *mem_end) | |
1848 | { | |
1849 | phandle child; | |
1850 | char *namep, *prev_name, *sstart, *p, *ep, *lp, *path; | |
1851 | unsigned long soff; | |
1852 | unsigned char *valp; | |
1853 | static char pname[MAX_PROPERTY_NAME]; | |
c4988820 | 1854 | int l, room; |
9b6b563c PM |
1855 | |
1856 | dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end); | |
1857 | ||
1858 | /* get the node's full name */ | |
1859 | namep = (char *)*mem_start; | |
c4988820 PM |
1860 | room = *mem_end - *mem_start; |
1861 | if (room > 255) | |
1862 | room = 255; | |
1863 | l = call_prom("package-to-path", 3, 1, node, namep, room); | |
9b6b563c PM |
1864 | if (l >= 0) { |
1865 | /* Didn't fit? Get more room. */ | |
c4988820 PM |
1866 | if (l >= room) { |
1867 | if (l >= *mem_end - *mem_start) | |
1868 | namep = make_room(mem_start, mem_end, l+1, 1); | |
9b6b563c PM |
1869 | call_prom("package-to-path", 3, 1, node, namep, l); |
1870 | } | |
1871 | namep[l] = '\0'; | |
1872 | ||
1873 | /* Fixup an Apple bug where they have bogus \0 chars in the | |
a575b807 PM |
1874 | * middle of the path in some properties, and extract |
1875 | * the unit name (everything after the last '/'). | |
9b6b563c | 1876 | */ |
a575b807 | 1877 | for (lp = p = namep, ep = namep + l; p < ep; p++) { |
9b6b563c | 1878 | if (*p == '/') |
a575b807 PM |
1879 | lp = namep; |
1880 | else if (*p != 0) | |
1881 | *lp++ = *p; | |
1882 | } | |
1883 | *lp = 0; | |
1884 | *mem_start = _ALIGN((unsigned long)lp + 1, 4); | |
9b6b563c PM |
1885 | } |
1886 | ||
1887 | /* get it again for debugging */ | |
1888 | path = RELOC(prom_scratch); | |
1889 | memset(path, 0, PROM_SCRATCH_SIZE); | |
1890 | call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); | |
1891 | ||
1892 | /* get and store all properties */ | |
1893 | prev_name = RELOC(""); | |
1894 | sstart = (char *)RELOC(dt_string_start); | |
1895 | for (;;) { | |
1896 | if (call_prom("nextprop", 3, 1, node, prev_name, | |
1897 | RELOC(pname)) != 1) | |
1898 | break; | |
1899 | ||
1900 | /* skip "name" */ | |
1901 | if (strcmp(RELOC(pname), RELOC("name")) == 0) { | |
1902 | prev_name = RELOC("name"); | |
1903 | continue; | |
1904 | } | |
1905 | ||
1906 | /* find string offset */ | |
1907 | soff = dt_find_string(RELOC(pname)); | |
1908 | if (soff == 0) { | |
1909 | prom_printf("WARNING: Can't find string index for" | |
1910 | " <%s>, node %s\n", RELOC(pname), path); | |
1911 | break; | |
1912 | } | |
1913 | prev_name = sstart + soff; | |
1914 | ||
1915 | /* get length */ | |
1916 | l = call_prom("getproplen", 2, 1, node, RELOC(pname)); | |
1917 | ||
1918 | /* sanity checks */ | |
1919 | if (l == PROM_ERROR) | |
1920 | continue; | |
1921 | if (l > MAX_PROPERTY_LENGTH) { | |
1922 | prom_printf("WARNING: ignoring large property "); | |
1923 | /* It seems OF doesn't null-terminate the path :-( */ | |
1924 | prom_printf("[%s] ", path); | |
1925 | prom_printf("%s length 0x%x\n", RELOC(pname), l); | |
1926 | continue; | |
1927 | } | |
1928 | ||
1929 | /* push property head */ | |
1930 | dt_push_token(OF_DT_PROP, mem_start, mem_end); | |
1931 | dt_push_token(l, mem_start, mem_end); | |
1932 | dt_push_token(soff, mem_start, mem_end); | |
1933 | ||
1934 | /* push property content */ | |
1935 | valp = make_room(mem_start, mem_end, l, 4); | |
1936 | call_prom("getprop", 4, 1, node, RELOC(pname), valp, l); | |
1937 | *mem_start = _ALIGN(*mem_start, 4); | |
1938 | } | |
1939 | ||
1940 | /* Add a "linux,phandle" property. */ | |
1941 | soff = dt_find_string(RELOC("linux,phandle")); | |
1942 | if (soff == 0) | |
1943 | prom_printf("WARNING: Can't find string index for" | |
1944 | " <linux-phandle> node %s\n", path); | |
1945 | else { | |
1946 | dt_push_token(OF_DT_PROP, mem_start, mem_end); | |
1947 | dt_push_token(4, mem_start, mem_end); | |
1948 | dt_push_token(soff, mem_start, mem_end); | |
1949 | valp = make_room(mem_start, mem_end, 4, 4); | |
1950 | *(u32 *)valp = node; | |
1951 | } | |
1952 | ||
1953 | /* do all our children */ | |
1954 | child = call_prom("child", 1, 1, node); | |
1955 | while (child != 0) { | |
1956 | scan_dt_build_struct(child, mem_start, mem_end); | |
1957 | child = call_prom("peer", 1, 1, child); | |
1958 | } | |
1959 | ||
1960 | dt_push_token(OF_DT_END_NODE, mem_start, mem_end); | |
1961 | } | |
1962 | ||
1963 | static void __init flatten_device_tree(void) | |
1964 | { | |
1965 | phandle root; | |
1966 | unsigned long mem_start, mem_end, room; | |
1967 | struct boot_param_header *hdr; | |
1968 | struct prom_t *_prom = &RELOC(prom); | |
1969 | char *namep; | |
1970 | u64 *rsvmap; | |
1971 | ||
1972 | /* | |
1973 | * Check how much room we have between alloc top & bottom (+/- a | |
1974 | * few pages), crop to 4Mb, as this is our "chuck" size | |
1975 | */ | |
1976 | room = RELOC(alloc_top) - RELOC(alloc_bottom) - 0x4000; | |
1977 | if (room > DEVTREE_CHUNK_SIZE) | |
1978 | room = DEVTREE_CHUNK_SIZE; | |
1979 | prom_debug("starting device tree allocs at %x\n", RELOC(alloc_bottom)); | |
1980 | ||
1981 | /* Now try to claim that */ | |
1982 | mem_start = (unsigned long)alloc_up(room, PAGE_SIZE); | |
1983 | if (mem_start == 0) | |
1984 | prom_panic("Can't allocate initial device-tree chunk\n"); | |
1985 | mem_end = RELOC(alloc_top); | |
1986 | ||
1987 | /* Get root of tree */ | |
1988 | root = call_prom("peer", 1, 1, (phandle)0); | |
1989 | if (root == (phandle)0) | |
1990 | prom_panic ("couldn't get device tree root\n"); | |
1991 | ||
1992 | /* Build header and make room for mem rsv map */ | |
1993 | mem_start = _ALIGN(mem_start, 4); | |
1994 | hdr = make_room(&mem_start, &mem_end, | |
1995 | sizeof(struct boot_param_header), 4); | |
1996 | RELOC(dt_header_start) = (unsigned long)hdr; | |
1997 | rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8); | |
1998 | ||
1999 | /* Start of strings */ | |
2000 | mem_start = PAGE_ALIGN(mem_start); | |
2001 | RELOC(dt_string_start) = mem_start; | |
2002 | mem_start += 4; /* hole */ | |
2003 | ||
2004 | /* Add "linux,phandle" in there, we'll need it */ | |
2005 | namep = make_room(&mem_start, &mem_end, 16, 1); | |
2006 | strcpy(namep, RELOC("linux,phandle")); | |
2007 | mem_start = (unsigned long)namep + strlen(namep) + 1; | |
2008 | ||
2009 | /* Build string array */ | |
2010 | prom_printf("Building dt strings...\n"); | |
2011 | scan_dt_build_strings(root, &mem_start, &mem_end); | |
2012 | RELOC(dt_string_end) = mem_start; | |
2013 | ||
2014 | /* Build structure */ | |
2015 | mem_start = PAGE_ALIGN(mem_start); | |
2016 | RELOC(dt_struct_start) = mem_start; | |
2017 | prom_printf("Building dt structure...\n"); | |
2018 | scan_dt_build_struct(root, &mem_start, &mem_end); | |
2019 | dt_push_token(OF_DT_END, &mem_start, &mem_end); | |
2020 | RELOC(dt_struct_end) = PAGE_ALIGN(mem_start); | |
2021 | ||
2022 | /* Finish header */ | |
2023 | hdr->boot_cpuid_phys = _prom->cpu; | |
2024 | hdr->magic = OF_DT_HEADER; | |
2025 | hdr->totalsize = RELOC(dt_struct_end) - RELOC(dt_header_start); | |
2026 | hdr->off_dt_struct = RELOC(dt_struct_start) - RELOC(dt_header_start); | |
2027 | hdr->off_dt_strings = RELOC(dt_string_start) - RELOC(dt_header_start); | |
2028 | hdr->dt_strings_size = RELOC(dt_string_end) - RELOC(dt_string_start); | |
2029 | hdr->off_mem_rsvmap = ((unsigned long)rsvmap) - RELOC(dt_header_start); | |
2030 | hdr->version = OF_DT_VERSION; | |
2031 | /* Version 16 is not backward compatible */ | |
2032 | hdr->last_comp_version = 0x10; | |
2033 | ||
2034 | /* Reserve the whole thing and copy the reserve map in, we | |
2035 | * also bump mem_reserve_cnt to cause further reservations to | |
2036 | * fail since it's too late. | |
2037 | */ | |
2038 | reserve_mem(RELOC(dt_header_start), hdr->totalsize); | |
2039 | memcpy(rsvmap, RELOC(mem_reserve_map), sizeof(mem_reserve_map)); | |
2040 | ||
2041 | #ifdef DEBUG_PROM | |
2042 | { | |
2043 | int i; | |
2044 | prom_printf("reserved memory map:\n"); | |
2045 | for (i = 0; i < RELOC(mem_reserve_cnt); i++) | |
2046 | prom_printf(" %x - %x\n", | |
2047 | RELOC(mem_reserve_map)[i].base, | |
2048 | RELOC(mem_reserve_map)[i].size); | |
2049 | } | |
2050 | #endif | |
2051 | RELOC(mem_reserve_cnt) = MEM_RESERVE_MAP_SIZE; | |
2052 | ||
2053 | prom_printf("Device tree strings 0x%x -> 0x%x\n", | |
2054 | RELOC(dt_string_start), RELOC(dt_string_end)); | |
2055 | prom_printf("Device tree struct 0x%x -> 0x%x\n", | |
2056 | RELOC(dt_struct_start), RELOC(dt_struct_end)); | |
2057 | ||
2058 | } | |
2059 | ||
2060 | ||
2061 | static void __init fixup_device_tree(void) | |
2062 | { | |
2063 | #if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC) | |
2064 | phandle u3, i2c, mpic; | |
2065 | u32 u3_rev; | |
2066 | u32 interrupts[2]; | |
2067 | u32 parent; | |
2068 | ||
2069 | /* Some G5s have a missing interrupt definition, fix it up here */ | |
2070 | u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000")); | |
2071 | if (!PHANDLE_VALID(u3)) | |
2072 | return; | |
2073 | i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000")); | |
2074 | if (!PHANDLE_VALID(i2c)) | |
2075 | return; | |
2076 | mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000")); | |
2077 | if (!PHANDLE_VALID(mpic)) | |
2078 | return; | |
2079 | ||
2080 | /* check if proper rev of u3 */ | |
2081 | if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev)) | |
2082 | == PROM_ERROR) | |
2083 | return; | |
7d49697e | 2084 | if (u3_rev < 0x35 || u3_rev > 0x39) |
9b6b563c PM |
2085 | return; |
2086 | /* does it need fixup ? */ | |
2087 | if (prom_getproplen(i2c, "interrupts") > 0) | |
2088 | return; | |
2089 | ||
2090 | prom_printf("fixing up bogus interrupts for u3 i2c...\n"); | |
2091 | ||
2092 | /* interrupt on this revision of u3 is number 0 and level */ | |
2093 | interrupts[0] = 0; | |
2094 | interrupts[1] = 1; | |
a23414be PM |
2095 | prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts", |
2096 | &interrupts, sizeof(interrupts)); | |
9b6b563c | 2097 | parent = (u32)mpic; |
a23414be PM |
2098 | prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent", |
2099 | &parent, sizeof(parent)); | |
9b6b563c PM |
2100 | #endif |
2101 | } | |
2102 | ||
2103 | ||
2104 | static void __init prom_find_boot_cpu(void) | |
2105 | { | |
2106 | struct prom_t *_prom = &RELOC(prom); | |
2107 | u32 getprop_rval; | |
2108 | ihandle prom_cpu; | |
2109 | phandle cpu_pkg; | |
2110 | ||
a575b807 | 2111 | _prom->cpu = 0; |
9b6b563c | 2112 | if (prom_getprop(_prom->chosen, "cpu", &prom_cpu, sizeof(prom_cpu)) <= 0) |
a575b807 | 2113 | return; |
9b6b563c PM |
2114 | |
2115 | cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu); | |
2116 | ||
2117 | prom_getprop(cpu_pkg, "reg", &getprop_rval, sizeof(getprop_rval)); | |
2118 | _prom->cpu = getprop_rval; | |
2119 | ||
2120 | prom_debug("Booting CPU hw index = 0x%x\n", _prom->cpu); | |
2121 | } | |
2122 | ||
2123 | static void __init prom_check_initrd(unsigned long r3, unsigned long r4) | |
2124 | { | |
2125 | #ifdef CONFIG_BLK_DEV_INITRD | |
2126 | struct prom_t *_prom = &RELOC(prom); | |
2127 | ||
2128 | if (r3 && r4 && r4 != 0xdeadbeef) { | |
2129 | unsigned long val; | |
2130 | ||
51fae6de | 2131 | RELOC(prom_initrd_start) = is_kernel_addr(r3) ? __pa(r3) : r3; |
9b6b563c PM |
2132 | RELOC(prom_initrd_end) = RELOC(prom_initrd_start) + r4; |
2133 | ||
2134 | val = RELOC(prom_initrd_start); | |
a23414be PM |
2135 | prom_setprop(_prom->chosen, "/chosen", "linux,initrd-start", |
2136 | &val, sizeof(val)); | |
9b6b563c | 2137 | val = RELOC(prom_initrd_end); |
a23414be PM |
2138 | prom_setprop(_prom->chosen, "/chosen", "linux,initrd-end", |
2139 | &val, sizeof(val)); | |
9b6b563c PM |
2140 | |
2141 | reserve_mem(RELOC(prom_initrd_start), | |
2142 | RELOC(prom_initrd_end) - RELOC(prom_initrd_start)); | |
2143 | ||
2144 | prom_debug("initrd_start=0x%x\n", RELOC(prom_initrd_start)); | |
2145 | prom_debug("initrd_end=0x%x\n", RELOC(prom_initrd_end)); | |
2146 | } | |
2147 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
2148 | } | |
2149 | ||
2150 | /* | |
2151 | * We enter here early on, when the Open Firmware prom is still | |
2152 | * handling exceptions and the MMU hash table for us. | |
2153 | */ | |
2154 | ||
2155 | unsigned long __init prom_init(unsigned long r3, unsigned long r4, | |
2156 | unsigned long pp, | |
2157 | unsigned long r6, unsigned long r7) | |
2158 | { | |
2159 | struct prom_t *_prom; | |
9b6b563c | 2160 | unsigned long hdr; |
b42b6617 | 2161 | unsigned long offset = reloc_offset(); |
9b6b563c PM |
2162 | |
2163 | #ifdef CONFIG_PPC32 | |
9b6b563c PM |
2164 | reloc_got2(offset); |
2165 | #endif | |
2166 | ||
2167 | _prom = &RELOC(prom); | |
2168 | ||
2169 | /* | |
2170 | * First zero the BSS | |
2171 | */ | |
2172 | memset(&RELOC(__bss_start), 0, __bss_stop - __bss_start); | |
2173 | ||
2174 | /* | |
2175 | * Init interface to Open Firmware, get some node references, | |
2176 | * like /chosen | |
2177 | */ | |
2178 | prom_init_client_services(pp); | |
2179 | ||
2180 | /* | |
a23414be PM |
2181 | * See if this OF is old enough that we need to do explicit maps |
2182 | * and other workarounds | |
9b6b563c | 2183 | */ |
a23414be | 2184 | prom_find_mmu(); |
9b6b563c | 2185 | |
a575b807 | 2186 | /* |
a23414be | 2187 | * Init prom stdout device |
a575b807 | 2188 | */ |
a23414be | 2189 | prom_init_stdout(); |
a575b807 | 2190 | |
9b6b563c PM |
2191 | /* |
2192 | * Get default machine type. At this point, we do not differentiate | |
2193 | * between pSeries SMP and pSeries LPAR | |
2194 | */ | |
2195 | RELOC(of_platform) = prom_find_machine_type(); | |
9b6b563c | 2196 | |
add60ef3 OH |
2197 | /* Bail if this is a kdump kernel. */ |
2198 | if (PHYSICAL_START > 0) | |
2199 | prom_panic("Error: You can't boot a kdump kernel from OF!\n"); | |
2200 | ||
2201 | /* | |
2202 | * Check for an initrd | |
2203 | */ | |
2204 | prom_check_initrd(r3, r4); | |
2205 | ||
9b6b563c PM |
2206 | #ifdef CONFIG_PPC_PSERIES |
2207 | /* | |
2208 | * On pSeries, inform the firmware about our capabilities | |
2209 | */ | |
799d6046 PM |
2210 | if (RELOC(of_platform) == PLATFORM_PSERIES || |
2211 | RELOC(of_platform) == PLATFORM_PSERIES_LPAR) | |
9b6b563c PM |
2212 | prom_send_capabilities(); |
2213 | #endif | |
2214 | ||
9b6b563c | 2215 | /* |
f3f66f59 | 2216 | * Copy the CPU hold code |
9b6b563c | 2217 | */ |
55d36339 | 2218 | if (RELOC(of_platform) != PLATFORM_POWERMAC) |
5a408329 | 2219 | copy_and_flush(0, KERNELBASE + offset, 0x100, 0); |
9b6b563c PM |
2220 | |
2221 | /* | |
2222 | * Do early parsing of command line | |
2223 | */ | |
2224 | early_cmdline_parse(); | |
2225 | ||
2226 | /* | |
2227 | * Initialize memory management within prom_init | |
2228 | */ | |
2229 | prom_init_mem(); | |
2230 | ||
dcee3036 ME |
2231 | #ifdef CONFIG_KEXEC |
2232 | if (RELOC(prom_crashk_base)) | |
2233 | reserve_mem(RELOC(prom_crashk_base), RELOC(prom_crashk_size)); | |
2234 | #endif | |
9b6b563c PM |
2235 | /* |
2236 | * Determine which cpu is actually running right _now_ | |
2237 | */ | |
2238 | prom_find_boot_cpu(); | |
2239 | ||
2240 | /* | |
2241 | * Initialize display devices | |
2242 | */ | |
2243 | prom_check_displays(); | |
2244 | ||
2245 | #ifdef CONFIG_PPC64 | |
2246 | /* | |
2247 | * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else | |
2248 | * that uses the allocator, we need to make sure we get the top of memory | |
2249 | * available for us here... | |
2250 | */ | |
2251 | if (RELOC(of_platform) == PLATFORM_PSERIES) | |
2252 | prom_initialize_tce_table(); | |
2253 | #endif | |
2254 | ||
2255 | /* | |
2256 | * On non-powermacs, try to instantiate RTAS and puts all CPUs | |
2257 | * in spin-loops. PowerMacs don't have a working RTAS and use | |
2258 | * a different way to spin CPUs | |
2259 | */ | |
2260 | if (RELOC(of_platform) != PLATFORM_POWERMAC) { | |
2261 | prom_instantiate_rtas(); | |
2262 | prom_hold_cpus(); | |
2263 | } | |
2264 | ||
2265 | /* | |
2266 | * Fill in some infos for use by the kernel later on | |
2267 | */ | |
2268 | if (RELOC(prom_memory_limit)) | |
a23414be | 2269 | prom_setprop(_prom->chosen, "/chosen", "linux,memory-limit", |
9b6b563c PM |
2270 | &RELOC(prom_memory_limit), |
2271 | sizeof(prom_memory_limit)); | |
2272 | #ifdef CONFIG_PPC64 | |
2273 | if (RELOC(ppc64_iommu_off)) | |
a23414be PM |
2274 | prom_setprop(_prom->chosen, "/chosen", "linux,iommu-off", |
2275 | NULL, 0); | |
9b6b563c PM |
2276 | |
2277 | if (RELOC(iommu_force_on)) | |
a23414be PM |
2278 | prom_setprop(_prom->chosen, "/chosen", "linux,iommu-force-on", |
2279 | NULL, 0); | |
9b6b563c PM |
2280 | |
2281 | if (RELOC(prom_tce_alloc_start)) { | |
a23414be | 2282 | prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-start", |
9b6b563c PM |
2283 | &RELOC(prom_tce_alloc_start), |
2284 | sizeof(prom_tce_alloc_start)); | |
a23414be | 2285 | prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-end", |
9b6b563c PM |
2286 | &RELOC(prom_tce_alloc_end), |
2287 | sizeof(prom_tce_alloc_end)); | |
2288 | } | |
2289 | #endif | |
2290 | ||
dcee3036 ME |
2291 | #ifdef CONFIG_KEXEC |
2292 | if (RELOC(prom_crashk_base)) { | |
2293 | prom_setprop(_prom->chosen, "/chosen", "linux,crashkernel-base", | |
2294 | PTRRELOC(&prom_crashk_base), | |
2295 | sizeof(RELOC(prom_crashk_base))); | |
2296 | prom_setprop(_prom->chosen, "/chosen", "linux,crashkernel-size", | |
2297 | PTRRELOC(&prom_crashk_size), | |
2298 | sizeof(RELOC(prom_crashk_size))); | |
2299 | } | |
2300 | #endif | |
9b6b563c PM |
2301 | /* |
2302 | * Fixup any known bugs in the device-tree | |
2303 | */ | |
2304 | fixup_device_tree(); | |
2305 | ||
2306 | /* | |
2307 | * Now finally create the flattened device-tree | |
2308 | */ | |
2309 | prom_printf("copying OF device tree ...\n"); | |
2310 | flatten_device_tree(); | |
2311 | ||
3825ac0e PM |
2312 | /* |
2313 | * in case stdin is USB and still active on IBM machines... | |
2314 | * Unfortunately quiesce crashes on some powermacs if we have | |
2315 | * closed stdin already (in particular the powerbook 101). | |
2316 | */ | |
2317 | if (RELOC(of_platform) != PLATFORM_POWERMAC) | |
2318 | prom_close_stdin(); | |
9b6b563c PM |
2319 | |
2320 | /* | |
2321 | * Call OF "quiesce" method to shut down pending DMA's from | |
2322 | * devices etc... | |
2323 | */ | |
2324 | prom_printf("Calling quiesce ...\n"); | |
2325 | call_prom("quiesce", 0, 0); | |
2326 | ||
2327 | /* | |
2328 | * And finally, call the kernel passing it the flattened device | |
2329 | * tree and NULL as r5, thus triggering the new entry point which | |
2330 | * is common to us and kexec | |
2331 | */ | |
2332 | hdr = RELOC(dt_header_start); | |
2333 | prom_printf("returning from prom_init\n"); | |
2334 | prom_debug("->dt_header_start=0x%x\n", hdr); | |
2335 | ||
2336 | #ifdef CONFIG_PPC32 | |
2337 | reloc_got2(-offset); | |
2338 | #endif | |
2339 | ||
35499c01 | 2340 | __start(hdr, KERNELBASE + offset, 0); |
9b6b563c PM |
2341 | |
2342 | return 0; | |
2343 | } |