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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 | ||
183 | static int __initdata of_platform; | |
184 | ||
185 | static char __initdata prom_cmd_line[COMMAND_LINE_SIZE]; | |
186 | ||
187 | static unsigned long __initdata prom_memory_limit; | |
188 | ||
189 | static unsigned long __initdata alloc_top; | |
190 | static unsigned long __initdata alloc_top_high; | |
191 | static unsigned long __initdata alloc_bottom; | |
192 | static unsigned long __initdata rmo_top; | |
193 | static unsigned long __initdata ram_top; | |
194 | ||
dcee3036 ME |
195 | #ifdef CONFIG_KEXEC |
196 | static unsigned long __initdata prom_crashk_base; | |
197 | static unsigned long __initdata prom_crashk_size; | |
198 | #endif | |
199 | ||
9b6b563c PM |
200 | static struct mem_map_entry __initdata mem_reserve_map[MEM_RESERVE_MAP_SIZE]; |
201 | static int __initdata mem_reserve_cnt; | |
202 | ||
203 | static cell_t __initdata regbuf[1024]; | |
204 | ||
205 | ||
206 | #define MAX_CPU_THREADS 2 | |
207 | ||
9b6b563c PM |
208 | /* |
209 | * Error results ... some OF calls will return "-1" on error, some | |
210 | * will return 0, some will return either. To simplify, here are | |
211 | * macros to use with any ihandle or phandle return value to check if | |
212 | * it is valid | |
213 | */ | |
214 | ||
215 | #define PROM_ERROR (-1u) | |
216 | #define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR) | |
217 | #define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR) | |
218 | ||
219 | ||
220 | /* This is the one and *ONLY* place where we actually call open | |
221 | * firmware. | |
222 | */ | |
223 | ||
224 | static int __init call_prom(const char *service, int nargs, int nret, ...) | |
225 | { | |
226 | int i; | |
227 | struct prom_args args; | |
228 | va_list list; | |
229 | ||
230 | args.service = ADDR(service); | |
231 | args.nargs = nargs; | |
232 | args.nret = nret; | |
233 | ||
234 | va_start(list, nret); | |
235 | for (i = 0; i < nargs; i++) | |
236 | args.args[i] = va_arg(list, prom_arg_t); | |
237 | va_end(list); | |
238 | ||
239 | for (i = 0; i < nret; i++) | |
240 | args.args[nargs+i] = 0; | |
241 | ||
c4988820 PM |
242 | if (enter_prom(&args, RELOC(prom_entry)) < 0) |
243 | return PROM_ERROR; | |
9b6b563c PM |
244 | |
245 | return (nret > 0) ? args.args[nargs] : 0; | |
246 | } | |
247 | ||
248 | static int __init call_prom_ret(const char *service, int nargs, int nret, | |
249 | prom_arg_t *rets, ...) | |
250 | { | |
251 | int i; | |
252 | struct prom_args args; | |
253 | va_list list; | |
254 | ||
255 | args.service = ADDR(service); | |
256 | args.nargs = nargs; | |
257 | args.nret = nret; | |
258 | ||
259 | va_start(list, rets); | |
260 | for (i = 0; i < nargs; i++) | |
261 | args.args[i] = va_arg(list, prom_arg_t); | |
262 | va_end(list); | |
263 | ||
264 | for (i = 0; i < nret; i++) | |
ed1189b7 | 265 | args.args[nargs+i] = 0; |
9b6b563c | 266 | |
c4988820 PM |
267 | if (enter_prom(&args, RELOC(prom_entry)) < 0) |
268 | return PROM_ERROR; | |
9b6b563c PM |
269 | |
270 | if (rets != NULL) | |
271 | for (i = 1; i < nret; ++i) | |
c5200c90 | 272 | rets[i-1] = args.args[nargs+i]; |
9b6b563c PM |
273 | |
274 | return (nret > 0) ? args.args[nargs] : 0; | |
275 | } | |
276 | ||
277 | ||
9b6b563c PM |
278 | static void __init prom_print(const char *msg) |
279 | { | |
280 | const char *p, *q; | |
281 | struct prom_t *_prom = &RELOC(prom); | |
282 | ||
283 | if (_prom->stdout == 0) | |
284 | return; | |
285 | ||
286 | for (p = msg; *p != 0; p = q) { | |
287 | for (q = p; *q != 0 && *q != '\n'; ++q) | |
288 | ; | |
289 | if (q > p) | |
290 | call_prom("write", 3, 1, _prom->stdout, p, q - p); | |
291 | if (*q == 0) | |
292 | break; | |
293 | ++q; | |
294 | call_prom("write", 3, 1, _prom->stdout, ADDR("\r\n"), 2); | |
295 | } | |
296 | } | |
297 | ||
298 | ||
299 | static void __init prom_print_hex(unsigned long val) | |
300 | { | |
301 | int i, nibbles = sizeof(val)*2; | |
302 | char buf[sizeof(val)*2+1]; | |
303 | struct prom_t *_prom = &RELOC(prom); | |
304 | ||
305 | for (i = nibbles-1; i >= 0; i--) { | |
306 | buf[i] = (val & 0xf) + '0'; | |
307 | if (buf[i] > '9') | |
308 | buf[i] += ('a'-'0'-10); | |
309 | val >>= 4; | |
310 | } | |
311 | buf[nibbles] = '\0'; | |
312 | call_prom("write", 3, 1, _prom->stdout, buf, nibbles); | |
313 | } | |
314 | ||
315 | ||
316 | static void __init prom_printf(const char *format, ...) | |
317 | { | |
318 | const char *p, *q, *s; | |
319 | va_list args; | |
320 | unsigned long v; | |
321 | struct prom_t *_prom = &RELOC(prom); | |
322 | ||
323 | va_start(args, format); | |
324 | #ifdef CONFIG_PPC64 | |
325 | format = PTRRELOC(format); | |
326 | #endif | |
327 | for (p = format; *p != 0; p = q) { | |
328 | for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q) | |
329 | ; | |
330 | if (q > p) | |
331 | call_prom("write", 3, 1, _prom->stdout, p, q - p); | |
332 | if (*q == 0) | |
333 | break; | |
334 | if (*q == '\n') { | |
335 | ++q; | |
336 | call_prom("write", 3, 1, _prom->stdout, | |
337 | ADDR("\r\n"), 2); | |
338 | continue; | |
339 | } | |
340 | ++q; | |
341 | if (*q == 0) | |
342 | break; | |
343 | switch (*q) { | |
344 | case 's': | |
345 | ++q; | |
346 | s = va_arg(args, const char *); | |
347 | prom_print(s); | |
348 | break; | |
349 | case 'x': | |
350 | ++q; | |
351 | v = va_arg(args, unsigned long); | |
352 | prom_print_hex(v); | |
353 | break; | |
354 | } | |
355 | } | |
356 | } | |
357 | ||
358 | ||
a575b807 PM |
359 | static unsigned int __init prom_claim(unsigned long virt, unsigned long size, |
360 | unsigned long align) | |
361 | { | |
a575b807 PM |
362 | struct prom_t *_prom = &RELOC(prom); |
363 | ||
a23414be PM |
364 | if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) { |
365 | /* | |
366 | * Old OF requires we claim physical and virtual separately | |
367 | * and then map explicitly (assuming virtual mode) | |
368 | */ | |
369 | int ret; | |
370 | prom_arg_t result; | |
371 | ||
372 | ret = call_prom_ret("call-method", 5, 2, &result, | |
373 | ADDR("claim"), _prom->memory, | |
374 | align, size, virt); | |
375 | if (ret != 0 || result == -1) | |
376 | return -1; | |
377 | ret = call_prom_ret("call-method", 5, 2, &result, | |
378 | ADDR("claim"), _prom->mmumap, | |
379 | align, size, virt); | |
380 | if (ret != 0) { | |
381 | call_prom("call-method", 4, 1, ADDR("release"), | |
382 | _prom->memory, size, virt); | |
383 | return -1; | |
384 | } | |
385 | /* the 0x12 is M (coherence) + PP == read/write */ | |
a575b807 | 386 | call_prom("call-method", 6, 1, |
a23414be PM |
387 | ADDR("map"), _prom->mmumap, 0x12, size, virt, virt); |
388 | return virt; | |
389 | } | |
390 | return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size, | |
391 | (prom_arg_t)align); | |
a575b807 PM |
392 | } |
393 | ||
9b6b563c PM |
394 | static void __init __attribute__((noreturn)) prom_panic(const char *reason) |
395 | { | |
396 | #ifdef CONFIG_PPC64 | |
397 | reason = PTRRELOC(reason); | |
398 | #endif | |
399 | prom_print(reason); | |
400 | /* ToDo: should put up an SRC here on p/iSeries */ | |
401 | call_prom("exit", 0, 0); | |
402 | ||
403 | for (;;) /* should never get here */ | |
404 | ; | |
405 | } | |
406 | ||
407 | ||
408 | static int __init prom_next_node(phandle *nodep) | |
409 | { | |
410 | phandle node; | |
411 | ||
412 | if ((node = *nodep) != 0 | |
413 | && (*nodep = call_prom("child", 1, 1, node)) != 0) | |
414 | return 1; | |
415 | if ((*nodep = call_prom("peer", 1, 1, node)) != 0) | |
416 | return 1; | |
417 | for (;;) { | |
418 | if ((node = call_prom("parent", 1, 1, node)) == 0) | |
419 | return 0; | |
420 | if ((*nodep = call_prom("peer", 1, 1, node)) != 0) | |
421 | return 1; | |
422 | } | |
423 | } | |
424 | ||
21fe3301 | 425 | static int inline prom_getprop(phandle node, const char *pname, |
9b6b563c PM |
426 | void *value, size_t valuelen) |
427 | { | |
428 | return call_prom("getprop", 4, 1, node, ADDR(pname), | |
429 | (u32)(unsigned long) value, (u32) valuelen); | |
430 | } | |
431 | ||
21fe3301 | 432 | static int inline prom_getproplen(phandle node, const char *pname) |
9b6b563c PM |
433 | { |
434 | return call_prom("getproplen", 2, 1, node, ADDR(pname)); | |
435 | } | |
436 | ||
a23414be | 437 | static void add_string(char **str, const char *q) |
9b6b563c | 438 | { |
a23414be PM |
439 | char *p = *str; |
440 | ||
441 | while (*q) | |
442 | *p++ = *q++; | |
443 | *p++ = ' '; | |
444 | *str = p; | |
445 | } | |
446 | ||
447 | static char *tohex(unsigned int x) | |
448 | { | |
449 | static char digits[] = "0123456789abcdef"; | |
450 | static char result[9]; | |
451 | int i; | |
452 | ||
453 | result[8] = 0; | |
454 | i = 8; | |
455 | do { | |
456 | --i; | |
457 | result[i] = digits[x & 0xf]; | |
458 | x >>= 4; | |
459 | } while (x != 0 && i > 0); | |
460 | return &result[i]; | |
461 | } | |
462 | ||
463 | static int __init prom_setprop(phandle node, const char *nodename, | |
464 | const char *pname, void *value, size_t valuelen) | |
465 | { | |
466 | char cmd[256], *p; | |
467 | ||
468 | if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL)) | |
469 | return call_prom("setprop", 4, 1, node, ADDR(pname), | |
470 | (u32)(unsigned long) value, (u32) valuelen); | |
471 | ||
472 | /* gah... setprop doesn't work on longtrail, have to use interpret */ | |
473 | p = cmd; | |
474 | add_string(&p, "dev"); | |
475 | add_string(&p, nodename); | |
476 | add_string(&p, tohex((u32)(unsigned long) value)); | |
477 | add_string(&p, tohex(valuelen)); | |
478 | add_string(&p, tohex(ADDR(pname))); | |
479 | add_string(&p, tohex(strlen(RELOC(pname)))); | |
480 | add_string(&p, "property"); | |
481 | *p = 0; | |
482 | return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd); | |
9b6b563c PM |
483 | } |
484 | ||
485 | /* We can't use the standard versions because of RELOC headaches. */ | |
486 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ | |
487 | || ('a' <= (c) && (c) <= 'f') \ | |
488 | || ('A' <= (c) && (c) <= 'F')) | |
489 | ||
490 | #define isdigit(c) ('0' <= (c) && (c) <= '9') | |
491 | #define islower(c) ('a' <= (c) && (c) <= 'z') | |
492 | #define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c)) | |
493 | ||
494 | unsigned long prom_strtoul(const char *cp, const char **endp) | |
495 | { | |
496 | unsigned long result = 0, base = 10, value; | |
497 | ||
498 | if (*cp == '0') { | |
499 | base = 8; | |
500 | cp++; | |
501 | if (toupper(*cp) == 'X') { | |
502 | cp++; | |
503 | base = 16; | |
504 | } | |
505 | } | |
506 | ||
507 | while (isxdigit(*cp) && | |
508 | (value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) { | |
509 | result = result * base + value; | |
510 | cp++; | |
511 | } | |
512 | ||
513 | if (endp) | |
514 | *endp = cp; | |
515 | ||
516 | return result; | |
517 | } | |
518 | ||
519 | unsigned long prom_memparse(const char *ptr, const char **retptr) | |
520 | { | |
521 | unsigned long ret = prom_strtoul(ptr, retptr); | |
522 | int shift = 0; | |
523 | ||
524 | /* | |
525 | * We can't use a switch here because GCC *may* generate a | |
526 | * jump table which won't work, because we're not running at | |
527 | * the address we're linked at. | |
528 | */ | |
529 | if ('G' == **retptr || 'g' == **retptr) | |
530 | shift = 30; | |
531 | ||
532 | if ('M' == **retptr || 'm' == **retptr) | |
533 | shift = 20; | |
534 | ||
535 | if ('K' == **retptr || 'k' == **retptr) | |
536 | shift = 10; | |
537 | ||
538 | if (shift) { | |
539 | ret <<= shift; | |
540 | (*retptr)++; | |
541 | } | |
542 | ||
543 | return ret; | |
544 | } | |
545 | ||
546 | /* | |
547 | * Early parsing of the command line passed to the kernel, used for | |
548 | * "mem=x" and the options that affect the iommu | |
549 | */ | |
550 | static void __init early_cmdline_parse(void) | |
551 | { | |
552 | struct prom_t *_prom = &RELOC(prom); | |
cc5d0189 BH |
553 | const char *opt; |
554 | char *p; | |
9b6b563c PM |
555 | int l = 0; |
556 | ||
557 | RELOC(prom_cmd_line[0]) = 0; | |
558 | p = RELOC(prom_cmd_line); | |
559 | if ((long)_prom->chosen > 0) | |
560 | l = prom_getprop(_prom->chosen, "bootargs", p, COMMAND_LINE_SIZE-1); | |
561 | #ifdef CONFIG_CMDLINE | |
562 | if (l == 0) /* dbl check */ | |
563 | strlcpy(RELOC(prom_cmd_line), | |
564 | RELOC(CONFIG_CMDLINE), sizeof(prom_cmd_line)); | |
565 | #endif /* CONFIG_CMDLINE */ | |
566 | prom_printf("command line: %s\n", RELOC(prom_cmd_line)); | |
567 | ||
568 | #ifdef CONFIG_PPC64 | |
569 | opt = strstr(RELOC(prom_cmd_line), RELOC("iommu=")); | |
570 | if (opt) { | |
571 | prom_printf("iommu opt is: %s\n", opt); | |
572 | opt += 6; | |
573 | while (*opt && *opt == ' ') | |
574 | opt++; | |
575 | if (!strncmp(opt, RELOC("off"), 3)) | |
576 | RELOC(ppc64_iommu_off) = 1; | |
577 | else if (!strncmp(opt, RELOC("force"), 5)) | |
578 | RELOC(iommu_force_on) = 1; | |
579 | } | |
580 | #endif | |
581 | ||
582 | opt = strstr(RELOC(prom_cmd_line), RELOC("mem=")); | |
583 | if (opt) { | |
584 | opt += 4; | |
585 | RELOC(prom_memory_limit) = prom_memparse(opt, (const char **)&opt); | |
586 | #ifdef CONFIG_PPC64 | |
587 | /* Align to 16 MB == size of ppc64 large page */ | |
588 | RELOC(prom_memory_limit) = ALIGN(RELOC(prom_memory_limit), 0x1000000); | |
589 | #endif | |
590 | } | |
dcee3036 ME |
591 | |
592 | #ifdef CONFIG_KEXEC | |
593 | /* | |
594 | * crashkernel=size@addr specifies the location to reserve for | |
595 | * crash kernel. | |
596 | */ | |
597 | opt = strstr(RELOC(prom_cmd_line), RELOC("crashkernel=")); | |
598 | if (opt) { | |
599 | opt += 12; | |
8385a6a3 HM |
600 | RELOC(prom_crashk_size) = |
601 | prom_memparse(opt, (const char **)&opt); | |
dcee3036 ME |
602 | |
603 | if (ALIGN(RELOC(prom_crashk_size), 0x1000000) != | |
604 | RELOC(prom_crashk_size)) { | |
605 | prom_printf("Warning: crashkernel size is not " | |
606 | "aligned to 16MB\n"); | |
607 | } | |
608 | ||
609 | /* | |
610 | * At present, the crash kernel always run at 32MB. | |
611 | * Just ignore whatever user passed. | |
612 | */ | |
613 | RELOC(prom_crashk_base) = 0x2000000; | |
614 | if (*opt == '@') { | |
615 | prom_printf("Warning: PPC64 kdump kernel always runs " | |
616 | "at 32 MB\n"); | |
617 | } | |
618 | } | |
619 | #endif | |
9b6b563c PM |
620 | } |
621 | ||
622 | #ifdef CONFIG_PPC_PSERIES | |
623 | /* | |
624 | * To tell the firmware what our capabilities are, we have to pass | |
625 | * it a fake 32-bit ELF header containing a couple of PT_NOTE sections | |
626 | * that contain structures that contain the actual values. | |
627 | */ | |
628 | static struct fake_elf { | |
629 | Elf32_Ehdr elfhdr; | |
630 | Elf32_Phdr phdr[2]; | |
631 | struct chrpnote { | |
632 | u32 namesz; | |
633 | u32 descsz; | |
634 | u32 type; | |
635 | char name[8]; /* "PowerPC" */ | |
636 | struct chrpdesc { | |
637 | u32 real_mode; | |
638 | u32 real_base; | |
639 | u32 real_size; | |
640 | u32 virt_base; | |
641 | u32 virt_size; | |
642 | u32 load_base; | |
643 | } chrpdesc; | |
644 | } chrpnote; | |
645 | struct rpanote { | |
646 | u32 namesz; | |
647 | u32 descsz; | |
648 | u32 type; | |
649 | char name[24]; /* "IBM,RPA-Client-Config" */ | |
650 | struct rpadesc { | |
651 | u32 lpar_affinity; | |
652 | u32 min_rmo_size; | |
653 | u32 min_rmo_percent; | |
654 | u32 max_pft_size; | |
655 | u32 splpar; | |
656 | u32 min_load; | |
657 | u32 new_mem_def; | |
658 | u32 ignore_me; | |
659 | } rpadesc; | |
660 | } rpanote; | |
661 | } fake_elf = { | |
662 | .elfhdr = { | |
663 | .e_ident = { 0x7f, 'E', 'L', 'F', | |
664 | ELFCLASS32, ELFDATA2MSB, EV_CURRENT }, | |
665 | .e_type = ET_EXEC, /* yeah right */ | |
666 | .e_machine = EM_PPC, | |
667 | .e_version = EV_CURRENT, | |
668 | .e_phoff = offsetof(struct fake_elf, phdr), | |
669 | .e_phentsize = sizeof(Elf32_Phdr), | |
670 | .e_phnum = 2 | |
671 | }, | |
672 | .phdr = { | |
673 | [0] = { | |
674 | .p_type = PT_NOTE, | |
675 | .p_offset = offsetof(struct fake_elf, chrpnote), | |
676 | .p_filesz = sizeof(struct chrpnote) | |
677 | }, [1] = { | |
678 | .p_type = PT_NOTE, | |
679 | .p_offset = offsetof(struct fake_elf, rpanote), | |
680 | .p_filesz = sizeof(struct rpanote) | |
681 | } | |
682 | }, | |
683 | .chrpnote = { | |
684 | .namesz = sizeof("PowerPC"), | |
685 | .descsz = sizeof(struct chrpdesc), | |
686 | .type = 0x1275, | |
687 | .name = "PowerPC", | |
688 | .chrpdesc = { | |
689 | .real_mode = ~0U, /* ~0 means "don't care" */ | |
690 | .real_base = ~0U, | |
691 | .real_size = ~0U, | |
692 | .virt_base = ~0U, | |
693 | .virt_size = ~0U, | |
694 | .load_base = ~0U | |
695 | }, | |
696 | }, | |
697 | .rpanote = { | |
698 | .namesz = sizeof("IBM,RPA-Client-Config"), | |
699 | .descsz = sizeof(struct rpadesc), | |
700 | .type = 0x12759999, | |
701 | .name = "IBM,RPA-Client-Config", | |
702 | .rpadesc = { | |
703 | .lpar_affinity = 0, | |
704 | .min_rmo_size = 64, /* in megabytes */ | |
705 | .min_rmo_percent = 0, | |
706 | .max_pft_size = 48, /* 2^48 bytes max PFT size */ | |
707 | .splpar = 1, | |
708 | .min_load = ~0U, | |
709 | .new_mem_def = 0 | |
710 | } | |
711 | } | |
712 | }; | |
713 | ||
714 | static void __init prom_send_capabilities(void) | |
715 | { | |
716 | ihandle elfloader; | |
717 | ||
718 | elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader")); | |
719 | if (elfloader == 0) { | |
720 | prom_printf("couldn't open /packages/elf-loader\n"); | |
721 | return; | |
722 | } | |
723 | call_prom("call-method", 3, 1, ADDR("process-elf-header"), | |
724 | elfloader, ADDR(&fake_elf)); | |
725 | call_prom("close", 1, 0, elfloader); | |
726 | } | |
727 | #endif | |
728 | ||
729 | /* | |
730 | * Memory allocation strategy... our layout is normally: | |
731 | * | |
732 | * at 14Mb or more we have vmlinux, then a gap and initrd. In some | |
733 | * rare cases, initrd might end up being before the kernel though. | |
734 | * We assume this won't override the final kernel at 0, we have no | |
735 | * provision to handle that in this version, but it should hopefully | |
736 | * never happen. | |
737 | * | |
738 | * alloc_top is set to the top of RMO, eventually shrink down if the | |
739 | * TCEs overlap | |
740 | * | |
741 | * alloc_bottom is set to the top of kernel/initrd | |
742 | * | |
743 | * from there, allocations are done this way : rtas is allocated | |
744 | * topmost, and the device-tree is allocated from the bottom. We try | |
745 | * to grow the device-tree allocation as we progress. If we can't, | |
746 | * then we fail, we don't currently have a facility to restart | |
747 | * elsewhere, but that shouldn't be necessary. | |
748 | * | |
749 | * Note that calls to reserve_mem have to be done explicitly, memory | |
750 | * allocated with either alloc_up or alloc_down isn't automatically | |
751 | * reserved. | |
752 | */ | |
753 | ||
754 | ||
755 | /* | |
756 | * Allocates memory in the RMO upward from the kernel/initrd | |
757 | * | |
758 | * When align is 0, this is a special case, it means to allocate in place | |
759 | * at the current location of alloc_bottom or fail (that is basically | |
760 | * extending the previous allocation). Used for the device-tree flattening | |
761 | */ | |
762 | static unsigned long __init alloc_up(unsigned long size, unsigned long align) | |
763 | { | |
c4988820 | 764 | unsigned long base = RELOC(alloc_bottom); |
9b6b563c PM |
765 | unsigned long addr = 0; |
766 | ||
c4988820 PM |
767 | if (align) |
768 | base = _ALIGN_UP(base, align); | |
9b6b563c PM |
769 | prom_debug("alloc_up(%x, %x)\n", size, align); |
770 | if (RELOC(ram_top) == 0) | |
771 | prom_panic("alloc_up() called with mem not initialized\n"); | |
772 | ||
773 | if (align) | |
774 | base = _ALIGN_UP(RELOC(alloc_bottom), align); | |
775 | else | |
776 | base = RELOC(alloc_bottom); | |
777 | ||
778 | for(; (base + size) <= RELOC(alloc_top); | |
779 | base = _ALIGN_UP(base + 0x100000, align)) { | |
780 | prom_debug(" trying: 0x%x\n\r", base); | |
781 | addr = (unsigned long)prom_claim(base, size, 0); | |
c4988820 | 782 | if (addr != PROM_ERROR && addr != 0) |
9b6b563c PM |
783 | break; |
784 | addr = 0; | |
785 | if (align == 0) | |
786 | break; | |
787 | } | |
788 | if (addr == 0) | |
789 | return 0; | |
790 | RELOC(alloc_bottom) = addr; | |
791 | ||
792 | prom_debug(" -> %x\n", addr); | |
793 | prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom)); | |
794 | prom_debug(" alloc_top : %x\n", RELOC(alloc_top)); | |
795 | prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); | |
796 | prom_debug(" rmo_top : %x\n", RELOC(rmo_top)); | |
797 | prom_debug(" ram_top : %x\n", RELOC(ram_top)); | |
798 | ||
799 | return addr; | |
800 | } | |
801 | ||
802 | /* | |
803 | * Allocates memory downward, either from top of RMO, or if highmem | |
804 | * is set, from the top of RAM. Note that this one doesn't handle | |
805 | * failures. It does claim memory if highmem is not set. | |
806 | */ | |
807 | static unsigned long __init alloc_down(unsigned long size, unsigned long align, | |
808 | int highmem) | |
809 | { | |
810 | unsigned long base, addr = 0; | |
811 | ||
812 | prom_debug("alloc_down(%x, %x, %s)\n", size, align, | |
813 | highmem ? RELOC("(high)") : RELOC("(low)")); | |
814 | if (RELOC(ram_top) == 0) | |
815 | prom_panic("alloc_down() called with mem not initialized\n"); | |
816 | ||
817 | if (highmem) { | |
818 | /* Carve out storage for the TCE table. */ | |
819 | addr = _ALIGN_DOWN(RELOC(alloc_top_high) - size, align); | |
820 | if (addr <= RELOC(alloc_bottom)) | |
821 | return 0; | |
822 | /* Will we bump into the RMO ? If yes, check out that we | |
823 | * didn't overlap existing allocations there, if we did, | |
824 | * we are dead, we must be the first in town ! | |
825 | */ | |
826 | if (addr < RELOC(rmo_top)) { | |
827 | /* Good, we are first */ | |
828 | if (RELOC(alloc_top) == RELOC(rmo_top)) | |
829 | RELOC(alloc_top) = RELOC(rmo_top) = addr; | |
830 | else | |
831 | return 0; | |
832 | } | |
833 | RELOC(alloc_top_high) = addr; | |
834 | goto bail; | |
835 | } | |
836 | ||
837 | base = _ALIGN_DOWN(RELOC(alloc_top) - size, align); | |
838 | for (; base > RELOC(alloc_bottom); | |
839 | base = _ALIGN_DOWN(base - 0x100000, align)) { | |
840 | prom_debug(" trying: 0x%x\n\r", base); | |
841 | addr = (unsigned long)prom_claim(base, size, 0); | |
c4988820 | 842 | if (addr != PROM_ERROR && addr != 0) |
9b6b563c PM |
843 | break; |
844 | addr = 0; | |
845 | } | |
846 | if (addr == 0) | |
847 | return 0; | |
848 | RELOC(alloc_top) = addr; | |
849 | ||
850 | bail: | |
851 | prom_debug(" -> %x\n", addr); | |
852 | prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom)); | |
853 | prom_debug(" alloc_top : %x\n", RELOC(alloc_top)); | |
854 | prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); | |
855 | prom_debug(" rmo_top : %x\n", RELOC(rmo_top)); | |
856 | prom_debug(" ram_top : %x\n", RELOC(ram_top)); | |
857 | ||
858 | return addr; | |
859 | } | |
860 | ||
861 | /* | |
862 | * Parse a "reg" cell | |
863 | */ | |
864 | static unsigned long __init prom_next_cell(int s, cell_t **cellp) | |
865 | { | |
866 | cell_t *p = *cellp; | |
867 | unsigned long r = 0; | |
868 | ||
869 | /* Ignore more than 2 cells */ | |
870 | while (s > sizeof(unsigned long) / 4) { | |
871 | p++; | |
872 | s--; | |
873 | } | |
874 | r = *p++; | |
875 | #ifdef CONFIG_PPC64 | |
35499c01 | 876 | if (s > 1) { |
9b6b563c PM |
877 | r <<= 32; |
878 | r |= *(p++); | |
879 | } | |
880 | #endif | |
881 | *cellp = p; | |
882 | return r; | |
883 | } | |
884 | ||
885 | /* | |
886 | * Very dumb function for adding to the memory reserve list, but | |
887 | * we don't need anything smarter at this point | |
888 | * | |
889 | * XXX Eventually check for collisions. They should NEVER happen. | |
890 | * If problems seem to show up, it would be a good start to track | |
891 | * them down. | |
892 | */ | |
cbbcf340 | 893 | static void reserve_mem(u64 base, u64 size) |
9b6b563c | 894 | { |
cbbcf340 | 895 | u64 top = base + size; |
9b6b563c PM |
896 | unsigned long cnt = RELOC(mem_reserve_cnt); |
897 | ||
898 | if (size == 0) | |
899 | return; | |
900 | ||
901 | /* We need to always keep one empty entry so that we | |
902 | * have our terminator with "size" set to 0 since we are | |
903 | * dumb and just copy this entire array to the boot params | |
904 | */ | |
905 | base = _ALIGN_DOWN(base, PAGE_SIZE); | |
906 | top = _ALIGN_UP(top, PAGE_SIZE); | |
907 | size = top - base; | |
908 | ||
909 | if (cnt >= (MEM_RESERVE_MAP_SIZE - 1)) | |
910 | prom_panic("Memory reserve map exhausted !\n"); | |
911 | RELOC(mem_reserve_map)[cnt].base = base; | |
912 | RELOC(mem_reserve_map)[cnt].size = size; | |
913 | RELOC(mem_reserve_cnt) = cnt + 1; | |
914 | } | |
915 | ||
916 | /* | |
917 | * Initialize memory allocation mecanism, parse "memory" nodes and | |
918 | * obtain that way the top of memory and RMO to setup out local allocator | |
919 | */ | |
920 | static void __init prom_init_mem(void) | |
921 | { | |
922 | phandle node; | |
923 | char *path, type[64]; | |
924 | unsigned int plen; | |
925 | cell_t *p, *endp; | |
926 | struct prom_t *_prom = &RELOC(prom); | |
927 | u32 rac, rsc; | |
928 | ||
929 | /* | |
930 | * We iterate the memory nodes to find | |
931 | * 1) top of RMO (first node) | |
932 | * 2) top of memory | |
933 | */ | |
934 | rac = 2; | |
935 | prom_getprop(_prom->root, "#address-cells", &rac, sizeof(rac)); | |
936 | rsc = 1; | |
937 | prom_getprop(_prom->root, "#size-cells", &rsc, sizeof(rsc)); | |
938 | prom_debug("root_addr_cells: %x\n", (unsigned long) rac); | |
939 | prom_debug("root_size_cells: %x\n", (unsigned long) rsc); | |
940 | ||
941 | prom_debug("scanning memory:\n"); | |
942 | path = RELOC(prom_scratch); | |
943 | ||
944 | for (node = 0; prom_next_node(&node); ) { | |
945 | type[0] = 0; | |
946 | prom_getprop(node, "device_type", type, sizeof(type)); | |
947 | ||
c4988820 PM |
948 | if (type[0] == 0) { |
949 | /* | |
950 | * CHRP Longtrail machines have no device_type | |
951 | * on the memory node, so check the name instead... | |
952 | */ | |
953 | prom_getprop(node, "name", type, sizeof(type)); | |
954 | } | |
9b6b563c PM |
955 | if (strcmp(type, RELOC("memory"))) |
956 | continue; | |
c4988820 | 957 | |
9b6b563c PM |
958 | plen = prom_getprop(node, "reg", RELOC(regbuf), sizeof(regbuf)); |
959 | if (plen > sizeof(regbuf)) { | |
960 | prom_printf("memory node too large for buffer !\n"); | |
961 | plen = sizeof(regbuf); | |
962 | } | |
963 | p = RELOC(regbuf); | |
964 | endp = p + (plen / sizeof(cell_t)); | |
965 | ||
966 | #ifdef DEBUG_PROM | |
967 | memset(path, 0, PROM_SCRATCH_SIZE); | |
968 | call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); | |
969 | prom_debug(" node %s :\n", path); | |
970 | #endif /* DEBUG_PROM */ | |
971 | ||
972 | while ((endp - p) >= (rac + rsc)) { | |
973 | unsigned long base, size; | |
974 | ||
975 | base = prom_next_cell(rac, &p); | |
976 | size = prom_next_cell(rsc, &p); | |
977 | ||
978 | if (size == 0) | |
979 | continue; | |
980 | prom_debug(" %x %x\n", base, size); | |
ab1b55e2 | 981 | if (base == 0 && (RELOC(of_platform) & PLATFORM_LPAR)) |
9b6b563c PM |
982 | RELOC(rmo_top) = size; |
983 | if ((base + size) > RELOC(ram_top)) | |
984 | RELOC(ram_top) = base + size; | |
985 | } | |
986 | } | |
987 | ||
988 | RELOC(alloc_bottom) = PAGE_ALIGN((unsigned long)&RELOC(_end) + 0x4000); | |
989 | ||
990 | /* Check if we have an initrd after the kernel, if we do move our bottom | |
991 | * point to after it | |
992 | */ | |
993 | if (RELOC(prom_initrd_start)) { | |
994 | if (RELOC(prom_initrd_end) > RELOC(alloc_bottom)) | |
995 | RELOC(alloc_bottom) = PAGE_ALIGN(RELOC(prom_initrd_end)); | |
996 | } | |
997 | ||
998 | /* | |
999 | * If prom_memory_limit is set we reduce the upper limits *except* for | |
1000 | * alloc_top_high. This must be the real top of RAM so we can put | |
1001 | * TCE's up there. | |
1002 | */ | |
1003 | ||
1004 | RELOC(alloc_top_high) = RELOC(ram_top); | |
1005 | ||
1006 | if (RELOC(prom_memory_limit)) { | |
1007 | if (RELOC(prom_memory_limit) <= RELOC(alloc_bottom)) { | |
1008 | prom_printf("Ignoring mem=%x <= alloc_bottom.\n", | |
1009 | RELOC(prom_memory_limit)); | |
1010 | RELOC(prom_memory_limit) = 0; | |
1011 | } else if (RELOC(prom_memory_limit) >= RELOC(ram_top)) { | |
1012 | prom_printf("Ignoring mem=%x >= ram_top.\n", | |
1013 | RELOC(prom_memory_limit)); | |
1014 | RELOC(prom_memory_limit) = 0; | |
1015 | } else { | |
1016 | RELOC(ram_top) = RELOC(prom_memory_limit); | |
1017 | RELOC(rmo_top) = min(RELOC(rmo_top), RELOC(prom_memory_limit)); | |
1018 | } | |
1019 | } | |
1020 | ||
1021 | /* | |
1022 | * Setup our top alloc point, that is top of RMO or top of | |
1023 | * segment 0 when running non-LPAR. | |
1024 | * Some RS64 machines have buggy firmware where claims up at | |
1025 | * 1GB fail. Cap at 768MB as a workaround. | |
1026 | * Since 768MB is plenty of room, and we need to cap to something | |
1027 | * reasonable on 32-bit, cap at 768MB on all machines. | |
1028 | */ | |
1029 | if (!RELOC(rmo_top)) | |
1030 | RELOC(rmo_top) = RELOC(ram_top); | |
1031 | RELOC(rmo_top) = min(0x30000000ul, RELOC(rmo_top)); | |
1032 | RELOC(alloc_top) = RELOC(rmo_top); | |
1033 | ||
1034 | prom_printf("memory layout at init:\n"); | |
1035 | prom_printf(" memory_limit : %x (16 MB aligned)\n", RELOC(prom_memory_limit)); | |
1036 | prom_printf(" alloc_bottom : %x\n", RELOC(alloc_bottom)); | |
1037 | prom_printf(" alloc_top : %x\n", RELOC(alloc_top)); | |
1038 | prom_printf(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); | |
1039 | prom_printf(" rmo_top : %x\n", RELOC(rmo_top)); | |
1040 | prom_printf(" ram_top : %x\n", RELOC(ram_top)); | |
dcee3036 ME |
1041 | #ifdef CONFIG_KEXEC |
1042 | if (RELOC(prom_crashk_base)) { | |
1043 | prom_printf(" crashk_base : %x\n", RELOC(prom_crashk_base)); | |
1044 | prom_printf(" crashk_size : %x\n", RELOC(prom_crashk_size)); | |
1045 | } | |
1046 | #endif | |
9b6b563c PM |
1047 | } |
1048 | ||
1049 | ||
1050 | /* | |
1051 | * Allocate room for and instantiate RTAS | |
1052 | */ | |
1053 | static void __init prom_instantiate_rtas(void) | |
1054 | { | |
1055 | phandle rtas_node; | |
1056 | ihandle rtas_inst; | |
1057 | u32 base, entry = 0; | |
1058 | u32 size = 0; | |
1059 | ||
1060 | prom_debug("prom_instantiate_rtas: start...\n"); | |
1061 | ||
1062 | rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas")); | |
1063 | prom_debug("rtas_node: %x\n", rtas_node); | |
1064 | if (!PHANDLE_VALID(rtas_node)) | |
1065 | return; | |
1066 | ||
1067 | prom_getprop(rtas_node, "rtas-size", &size, sizeof(size)); | |
1068 | if (size == 0) | |
1069 | return; | |
1070 | ||
1071 | base = alloc_down(size, PAGE_SIZE, 0); | |
1072 | if (base == 0) { | |
1073 | prom_printf("RTAS allocation failed !\n"); | |
1074 | return; | |
1075 | } | |
1076 | ||
1077 | rtas_inst = call_prom("open", 1, 1, ADDR("/rtas")); | |
1078 | if (!IHANDLE_VALID(rtas_inst)) { | |
a23414be | 1079 | prom_printf("opening rtas package failed (%x)\n", rtas_inst); |
9b6b563c PM |
1080 | return; |
1081 | } | |
1082 | ||
1083 | prom_printf("instantiating rtas at 0x%x ...", base); | |
1084 | ||
1085 | if (call_prom_ret("call-method", 3, 2, &entry, | |
1086 | ADDR("instantiate-rtas"), | |
a23414be | 1087 | rtas_inst, base) != 0 |
9b6b563c PM |
1088 | || entry == 0) { |
1089 | prom_printf(" failed\n"); | |
1090 | return; | |
1091 | } | |
1092 | prom_printf(" done\n"); | |
1093 | ||
1094 | reserve_mem(base, size); | |
1095 | ||
a23414be PM |
1096 | prom_setprop(rtas_node, "/rtas", "linux,rtas-base", |
1097 | &base, sizeof(base)); | |
1098 | prom_setprop(rtas_node, "/rtas", "linux,rtas-entry", | |
1099 | &entry, sizeof(entry)); | |
9b6b563c PM |
1100 | |
1101 | prom_debug("rtas base = 0x%x\n", base); | |
1102 | prom_debug("rtas entry = 0x%x\n", entry); | |
1103 | prom_debug("rtas size = 0x%x\n", (long)size); | |
1104 | ||
1105 | prom_debug("prom_instantiate_rtas: end...\n"); | |
1106 | } | |
1107 | ||
1108 | #ifdef CONFIG_PPC64 | |
1109 | /* | |
1110 | * Allocate room for and initialize TCE tables | |
1111 | */ | |
1112 | static void __init prom_initialize_tce_table(void) | |
1113 | { | |
1114 | phandle node; | |
1115 | ihandle phb_node; | |
1116 | char compatible[64], type[64], model[64]; | |
1117 | char *path = RELOC(prom_scratch); | |
1118 | u64 base, align; | |
1119 | u32 minalign, minsize; | |
1120 | u64 tce_entry, *tce_entryp; | |
1121 | u64 local_alloc_top, local_alloc_bottom; | |
1122 | u64 i; | |
1123 | ||
1124 | if (RELOC(ppc64_iommu_off)) | |
1125 | return; | |
1126 | ||
1127 | prom_debug("starting prom_initialize_tce_table\n"); | |
1128 | ||
1129 | /* Cache current top of allocs so we reserve a single block */ | |
1130 | local_alloc_top = RELOC(alloc_top_high); | |
1131 | local_alloc_bottom = local_alloc_top; | |
1132 | ||
1133 | /* Search all nodes looking for PHBs. */ | |
1134 | for (node = 0; prom_next_node(&node); ) { | |
1135 | compatible[0] = 0; | |
1136 | type[0] = 0; | |
1137 | model[0] = 0; | |
1138 | prom_getprop(node, "compatible", | |
1139 | compatible, sizeof(compatible)); | |
1140 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1141 | prom_getprop(node, "model", model, sizeof(model)); | |
1142 | ||
1143 | if ((type[0] == 0) || (strstr(type, RELOC("pci")) == NULL)) | |
1144 | continue; | |
1145 | ||
1146 | /* Keep the old logic in tack to avoid regression. */ | |
1147 | if (compatible[0] != 0) { | |
1148 | if ((strstr(compatible, RELOC("python")) == NULL) && | |
1149 | (strstr(compatible, RELOC("Speedwagon")) == NULL) && | |
1150 | (strstr(compatible, RELOC("Winnipeg")) == NULL)) | |
1151 | continue; | |
1152 | } else if (model[0] != 0) { | |
1153 | if ((strstr(model, RELOC("ython")) == NULL) && | |
1154 | (strstr(model, RELOC("peedwagon")) == NULL) && | |
1155 | (strstr(model, RELOC("innipeg")) == NULL)) | |
1156 | continue; | |
1157 | } | |
1158 | ||
1159 | if (prom_getprop(node, "tce-table-minalign", &minalign, | |
1160 | sizeof(minalign)) == PROM_ERROR) | |
1161 | minalign = 0; | |
1162 | if (prom_getprop(node, "tce-table-minsize", &minsize, | |
1163 | sizeof(minsize)) == PROM_ERROR) | |
1164 | minsize = 4UL << 20; | |
1165 | ||
1166 | /* | |
1167 | * Even though we read what OF wants, we just set the table | |
1168 | * size to 4 MB. This is enough to map 2GB of PCI DMA space. | |
1169 | * By doing this, we avoid the pitfalls of trying to DMA to | |
1170 | * MMIO space and the DMA alias hole. | |
1171 | * | |
1172 | * On POWER4, firmware sets the TCE region by assuming | |
1173 | * each TCE table is 8MB. Using this memory for anything | |
1174 | * else will impact performance, so we always allocate 8MB. | |
1175 | * Anton | |
1176 | */ | |
1177 | if (__is_processor(PV_POWER4) || __is_processor(PV_POWER4p)) | |
1178 | minsize = 8UL << 20; | |
1179 | else | |
1180 | minsize = 4UL << 20; | |
1181 | ||
1182 | /* Align to the greater of the align or size */ | |
1183 | align = max(minalign, minsize); | |
1184 | base = alloc_down(minsize, align, 1); | |
1185 | if (base == 0) | |
1186 | prom_panic("ERROR, cannot find space for TCE table.\n"); | |
1187 | if (base < local_alloc_bottom) | |
1188 | local_alloc_bottom = base; | |
1189 | ||
9b6b563c PM |
1190 | /* It seems OF doesn't null-terminate the path :-( */ |
1191 | memset(path, 0, sizeof(path)); | |
1192 | /* Call OF to setup the TCE hardware */ | |
1193 | if (call_prom("package-to-path", 3, 1, node, | |
1194 | path, PROM_SCRATCH_SIZE-1) == PROM_ERROR) { | |
1195 | prom_printf("package-to-path failed\n"); | |
1196 | } | |
1197 | ||
a23414be PM |
1198 | /* Save away the TCE table attributes for later use. */ |
1199 | prom_setprop(node, path, "linux,tce-base", &base, sizeof(base)); | |
1200 | prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize)); | |
1201 | ||
9b6b563c PM |
1202 | prom_debug("TCE table: %s\n", path); |
1203 | prom_debug("\tnode = 0x%x\n", node); | |
1204 | prom_debug("\tbase = 0x%x\n", base); | |
1205 | prom_debug("\tsize = 0x%x\n", minsize); | |
1206 | ||
1207 | /* Initialize the table to have a one-to-one mapping | |
1208 | * over the allocated size. | |
1209 | */ | |
1210 | tce_entryp = (unsigned long *)base; | |
1211 | for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) { | |
1212 | tce_entry = (i << PAGE_SHIFT); | |
1213 | tce_entry |= 0x3; | |
1214 | *tce_entryp = tce_entry; | |
1215 | } | |
1216 | ||
1217 | prom_printf("opening PHB %s", path); | |
1218 | phb_node = call_prom("open", 1, 1, path); | |
1219 | if (phb_node == 0) | |
1220 | prom_printf("... failed\n"); | |
1221 | else | |
1222 | prom_printf("... done\n"); | |
1223 | ||
1224 | call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"), | |
1225 | phb_node, -1, minsize, | |
1226 | (u32) base, (u32) (base >> 32)); | |
1227 | call_prom("close", 1, 0, phb_node); | |
1228 | } | |
1229 | ||
1230 | reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom); | |
1231 | ||
1232 | if (RELOC(prom_memory_limit)) { | |
1233 | /* | |
1234 | * We align the start to a 16MB boundary so we can map | |
1235 | * the TCE area using large pages if possible. | |
1236 | * The end should be the top of RAM so no need to align it. | |
1237 | */ | |
1238 | RELOC(prom_tce_alloc_start) = _ALIGN_DOWN(local_alloc_bottom, | |
1239 | 0x1000000); | |
1240 | RELOC(prom_tce_alloc_end) = local_alloc_top; | |
1241 | } | |
1242 | ||
1243 | /* Flag the first invalid entry */ | |
1244 | prom_debug("ending prom_initialize_tce_table\n"); | |
1245 | } | |
1246 | #endif | |
1247 | ||
1248 | /* | |
1249 | * With CHRP SMP we need to use the OF to start the other processors. | |
1250 | * We can't wait until smp_boot_cpus (the OF is trashed by then) | |
1251 | * so we have to put the processors into a holding pattern controlled | |
1252 | * by the kernel (not OF) before we destroy the OF. | |
1253 | * | |
1254 | * This uses a chunk of low memory, puts some holding pattern | |
1255 | * code there and sends the other processors off to there until | |
1256 | * smp_boot_cpus tells them to do something. The holding pattern | |
1257 | * checks that address until its cpu # is there, when it is that | |
1258 | * cpu jumps to __secondary_start(). smp_boot_cpus() takes care | |
1259 | * of setting those values. | |
1260 | * | |
1261 | * We also use physical address 0x4 here to tell when a cpu | |
1262 | * is in its holding pattern code. | |
1263 | * | |
1264 | * -- Cort | |
1265 | */ | |
bbd0abda PM |
1266 | extern void __secondary_hold(void); |
1267 | extern unsigned long __secondary_hold_spinloop; | |
1268 | extern unsigned long __secondary_hold_acknowledge; | |
1269 | ||
1270 | /* | |
1271 | * We want to reference the copy of __secondary_hold_* in the | |
1272 | * 0 - 0x100 address range | |
1273 | */ | |
1274 | #define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff) | |
1275 | ||
9b6b563c PM |
1276 | static void __init prom_hold_cpus(void) |
1277 | { | |
9b6b563c PM |
1278 | unsigned long i; |
1279 | unsigned int reg; | |
1280 | phandle node; | |
1281 | char type[64]; | |
1282 | int cpuid = 0; | |
1283 | unsigned int interrupt_server[MAX_CPU_THREADS]; | |
1284 | unsigned int cpu_threads, hw_cpu_num; | |
1285 | int propsize; | |
bbd0abda | 1286 | struct prom_t *_prom = &RELOC(prom); |
9b6b563c | 1287 | unsigned long *spinloop |
bbd0abda | 1288 | = (void *) LOW_ADDR(__secondary_hold_spinloop); |
9b6b563c | 1289 | unsigned long *acknowledge |
bbd0abda | 1290 | = (void *) LOW_ADDR(__secondary_hold_acknowledge); |
9b6b563c | 1291 | #ifdef CONFIG_PPC64 |
bbd0abda | 1292 | /* __secondary_hold is actually a descriptor, not the text address */ |
9b6b563c PM |
1293 | unsigned long secondary_hold |
1294 | = __pa(*PTRRELOC((unsigned long *)__secondary_hold)); | |
1295 | #else | |
bbd0abda | 1296 | unsigned long secondary_hold = LOW_ADDR(__secondary_hold); |
9b6b563c | 1297 | #endif |
9b6b563c PM |
1298 | |
1299 | prom_debug("prom_hold_cpus: start...\n"); | |
1300 | prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop); | |
1301 | prom_debug(" 1) *spinloop = 0x%x\n", *spinloop); | |
1302 | prom_debug(" 1) acknowledge = 0x%x\n", | |
1303 | (unsigned long)acknowledge); | |
1304 | prom_debug(" 1) *acknowledge = 0x%x\n", *acknowledge); | |
1305 | prom_debug(" 1) secondary_hold = 0x%x\n", secondary_hold); | |
1306 | ||
1307 | /* Set the common spinloop variable, so all of the secondary cpus | |
1308 | * will block when they are awakened from their OF spinloop. | |
1309 | * This must occur for both SMP and non SMP kernels, since OF will | |
1310 | * be trashed when we move the kernel. | |
1311 | */ | |
1312 | *spinloop = 0; | |
1313 | ||
9b6b563c PM |
1314 | /* look for cpus */ |
1315 | for (node = 0; prom_next_node(&node); ) { | |
1316 | type[0] = 0; | |
1317 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1318 | if (strcmp(type, RELOC("cpu")) != 0) | |
1319 | continue; | |
1320 | ||
1321 | /* Skip non-configured cpus. */ | |
1322 | if (prom_getprop(node, "status", type, sizeof(type)) > 0) | |
1323 | if (strcmp(type, RELOC("okay")) != 0) | |
1324 | continue; | |
1325 | ||
1326 | reg = -1; | |
1327 | prom_getprop(node, "reg", ®, sizeof(reg)); | |
1328 | ||
1329 | prom_debug("\ncpuid = 0x%x\n", cpuid); | |
1330 | prom_debug("cpu hw idx = 0x%x\n", reg); | |
1331 | ||
1332 | /* Init the acknowledge var which will be reset by | |
1333 | * the secondary cpu when it awakens from its OF | |
1334 | * spinloop. | |
1335 | */ | |
1336 | *acknowledge = (unsigned long)-1; | |
1337 | ||
1338 | propsize = prom_getprop(node, "ibm,ppc-interrupt-server#s", | |
1339 | &interrupt_server, | |
1340 | sizeof(interrupt_server)); | |
1341 | if (propsize < 0) { | |
1342 | /* no property. old hardware has no SMT */ | |
1343 | cpu_threads = 1; | |
1344 | interrupt_server[0] = reg; /* fake it with phys id */ | |
1345 | } else { | |
1346 | /* We have a threaded processor */ | |
1347 | cpu_threads = propsize / sizeof(u32); | |
1348 | if (cpu_threads > MAX_CPU_THREADS) { | |
1349 | prom_printf("SMT: too many threads!\n" | |
1350 | "SMT: found %x, max is %x\n", | |
1351 | cpu_threads, MAX_CPU_THREADS); | |
1352 | cpu_threads = 1; /* ToDo: panic? */ | |
1353 | } | |
1354 | } | |
1355 | ||
1356 | hw_cpu_num = interrupt_server[0]; | |
1357 | if (hw_cpu_num != _prom->cpu) { | |
1358 | /* Primary Thread of non-boot cpu */ | |
1359 | prom_printf("%x : starting cpu hw idx %x... ", cpuid, reg); | |
1360 | call_prom("start-cpu", 3, 0, node, | |
1361 | secondary_hold, reg); | |
1362 | ||
bbd0abda PM |
1363 | for (i = 0; (i < 100000000) && |
1364 | (*acknowledge == ((unsigned long)-1)); i++ ) | |
9b6b563c PM |
1365 | mb(); |
1366 | ||
bbd0abda | 1367 | if (*acknowledge == reg) |
9b6b563c | 1368 | prom_printf("done\n"); |
bbd0abda | 1369 | else |
9b6b563c | 1370 | prom_printf("failed: %x\n", *acknowledge); |
9b6b563c PM |
1371 | } |
1372 | #ifdef CONFIG_SMP | |
1373 | else | |
1374 | prom_printf("%x : boot cpu %x\n", cpuid, reg); | |
9b6b563c | 1375 | #endif /* CONFIG_SMP */ |
bbd0abda PM |
1376 | |
1377 | /* Reserve cpu #s for secondary threads. They start later. */ | |
1378 | cpuid += cpu_threads; | |
9b6b563c | 1379 | } |
9b6b563c PM |
1380 | |
1381 | if (cpuid > NR_CPUS) | |
1382 | prom_printf("WARNING: maximum CPUs (" __stringify(NR_CPUS) | |
1383 | ") exceeded: ignoring extras\n"); | |
1384 | ||
1385 | prom_debug("prom_hold_cpus: end...\n"); | |
9b6b563c PM |
1386 | } |
1387 | ||
1388 | ||
1389 | static void __init prom_init_client_services(unsigned long pp) | |
1390 | { | |
1391 | struct prom_t *_prom = &RELOC(prom); | |
1392 | ||
1393 | /* Get a handle to the prom entry point before anything else */ | |
1394 | RELOC(prom_entry) = pp; | |
1395 | ||
1396 | /* get a handle for the stdout device */ | |
1397 | _prom->chosen = call_prom("finddevice", 1, 1, ADDR("/chosen")); | |
1398 | if (!PHANDLE_VALID(_prom->chosen)) | |
1399 | prom_panic("cannot find chosen"); /* msg won't be printed :( */ | |
1400 | ||
1401 | /* get device tree root */ | |
1402 | _prom->root = call_prom("finddevice", 1, 1, ADDR("/")); | |
1403 | if (!PHANDLE_VALID(_prom->root)) | |
1404 | prom_panic("cannot find device tree root"); /* msg won't be printed :( */ | |
a575b807 PM |
1405 | |
1406 | _prom->mmumap = 0; | |
1407 | } | |
1408 | ||
1409 | #ifdef CONFIG_PPC32 | |
1410 | /* | |
1411 | * For really old powermacs, we need to map things we claim. | |
1412 | * For that, we need the ihandle of the mmu. | |
a23414be | 1413 | * Also, on the longtrail, we need to work around other bugs. |
a575b807 PM |
1414 | */ |
1415 | static void __init prom_find_mmu(void) | |
1416 | { | |
1417 | struct prom_t *_prom = &RELOC(prom); | |
1418 | phandle oprom; | |
1419 | char version[64]; | |
1420 | ||
1421 | oprom = call_prom("finddevice", 1, 1, ADDR("/openprom")); | |
1422 | if (!PHANDLE_VALID(oprom)) | |
1423 | return; | |
1424 | if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0) | |
1425 | return; | |
1426 | version[sizeof(version) - 1] = 0; | |
a575b807 | 1427 | /* XXX might need to add other versions here */ |
a23414be PM |
1428 | if (strcmp(version, "Open Firmware, 1.0.5") == 0) |
1429 | of_workarounds = OF_WA_CLAIM; | |
1430 | else if (strncmp(version, "FirmWorks,3.", 12) == 0) { | |
1431 | of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL; | |
1432 | call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim"); | |
1433 | } else | |
a575b807 | 1434 | return; |
a23414be | 1435 | _prom->memory = call_prom("open", 1, 1, ADDR("/memory")); |
a575b807 PM |
1436 | prom_getprop(_prom->chosen, "mmu", &_prom->mmumap, |
1437 | sizeof(_prom->mmumap)); | |
a23414be PM |
1438 | if (!IHANDLE_VALID(_prom->memory) || !IHANDLE_VALID(_prom->mmumap)) |
1439 | of_workarounds &= ~OF_WA_CLAIM; /* hmmm */ | |
9b6b563c | 1440 | } |
a575b807 PM |
1441 | #else |
1442 | #define prom_find_mmu() | |
1443 | #endif | |
9b6b563c PM |
1444 | |
1445 | static void __init prom_init_stdout(void) | |
1446 | { | |
1447 | struct prom_t *_prom = &RELOC(prom); | |
1448 | char *path = RELOC(of_stdout_device); | |
1449 | char type[16]; | |
1450 | u32 val; | |
1451 | ||
1452 | if (prom_getprop(_prom->chosen, "stdout", &val, sizeof(val)) <= 0) | |
1453 | prom_panic("cannot find stdout"); | |
1454 | ||
1455 | _prom->stdout = val; | |
1456 | ||
1457 | /* Get the full OF pathname of the stdout device */ | |
1458 | memset(path, 0, 256); | |
1459 | call_prom("instance-to-path", 3, 1, _prom->stdout, path, 255); | |
1460 | val = call_prom("instance-to-package", 1, 1, _prom->stdout); | |
a23414be PM |
1461 | prom_setprop(_prom->chosen, "/chosen", "linux,stdout-package", |
1462 | &val, sizeof(val)); | |
9b6b563c | 1463 | prom_printf("OF stdout device is: %s\n", RELOC(of_stdout_device)); |
a23414be PM |
1464 | prom_setprop(_prom->chosen, "/chosen", "linux,stdout-path", |
1465 | path, strlen(path) + 1); | |
9b6b563c PM |
1466 | |
1467 | /* If it's a display, note it */ | |
1468 | memset(type, 0, sizeof(type)); | |
1469 | prom_getprop(val, "device_type", type, sizeof(type)); | |
1470 | if (strcmp(type, RELOC("display")) == 0) | |
a23414be | 1471 | prom_setprop(val, path, "linux,boot-display", NULL, 0); |
9b6b563c PM |
1472 | } |
1473 | ||
1474 | static void __init prom_close_stdin(void) | |
1475 | { | |
1476 | struct prom_t *_prom = &RELOC(prom); | |
1477 | ihandle val; | |
1478 | ||
1479 | if (prom_getprop(_prom->chosen, "stdin", &val, sizeof(val)) > 0) | |
1480 | call_prom("close", 1, 0, val); | |
1481 | } | |
1482 | ||
1483 | static int __init prom_find_machine_type(void) | |
1484 | { | |
1485 | struct prom_t *_prom = &RELOC(prom); | |
1486 | char compat[256]; | |
1487 | int len, i = 0; | |
21fe3301 | 1488 | #ifdef CONFIG_PPC64 |
9b6b563c | 1489 | phandle rtas; |
21fe3301 | 1490 | #endif |
9b6b563c PM |
1491 | len = prom_getprop(_prom->root, "compatible", |
1492 | compat, sizeof(compat)-1); | |
1493 | if (len > 0) { | |
1494 | compat[len] = 0; | |
1495 | while (i < len) { | |
1496 | char *p = &compat[i]; | |
1497 | int sl = strlen(p); | |
1498 | if (sl == 0) | |
1499 | break; | |
1500 | if (strstr(p, RELOC("Power Macintosh")) || | |
a575b807 | 1501 | strstr(p, RELOC("MacRISC"))) |
9b6b563c PM |
1502 | return PLATFORM_POWERMAC; |
1503 | #ifdef CONFIG_PPC64 | |
1504 | if (strstr(p, RELOC("Momentum,Maple"))) | |
1505 | return PLATFORM_MAPLE; | |
dad482c2 AB |
1506 | if (strstr(p, RELOC("IBM,CPB"))) |
1507 | return PLATFORM_CELL; | |
9b6b563c PM |
1508 | #endif |
1509 | i += sl + 1; | |
1510 | } | |
1511 | } | |
1512 | #ifdef CONFIG_PPC64 | |
1513 | /* Default to pSeries. We need to know if we are running LPAR */ | |
1514 | rtas = call_prom("finddevice", 1, 1, ADDR("/rtas")); | |
1515 | if (PHANDLE_VALID(rtas)) { | |
1516 | int x = prom_getproplen(rtas, "ibm,hypertas-functions"); | |
1517 | if (x != PROM_ERROR) { | |
1518 | prom_printf("Hypertas detected, assuming LPAR !\n"); | |
1519 | return PLATFORM_PSERIES_LPAR; | |
1520 | } | |
1521 | } | |
1522 | return PLATFORM_PSERIES; | |
1523 | #else | |
1524 | return PLATFORM_CHRP; | |
1525 | #endif | |
1526 | } | |
1527 | ||
9b6b563c PM |
1528 | static int __init prom_set_color(ihandle ih, int i, int r, int g, int b) |
1529 | { | |
1530 | return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r); | |
1531 | } | |
1532 | ||
1533 | /* | |
1534 | * If we have a display that we don't know how to drive, | |
1535 | * we will want to try to execute OF's open method for it | |
1536 | * later. However, OF will probably fall over if we do that | |
1537 | * we've taken over the MMU. | |
1538 | * So we check whether we will need to open the display, | |
1539 | * and if so, open it now. | |
1540 | */ | |
1541 | static void __init prom_check_displays(void) | |
1542 | { | |
1543 | char type[16], *path; | |
1544 | phandle node; | |
1545 | ihandle ih; | |
1546 | int i; | |
9b6b563c PM |
1547 | |
1548 | static unsigned char default_colors[] = { | |
1549 | 0x00, 0x00, 0x00, | |
1550 | 0x00, 0x00, 0xaa, | |
1551 | 0x00, 0xaa, 0x00, | |
1552 | 0x00, 0xaa, 0xaa, | |
1553 | 0xaa, 0x00, 0x00, | |
1554 | 0xaa, 0x00, 0xaa, | |
1555 | 0xaa, 0xaa, 0x00, | |
1556 | 0xaa, 0xaa, 0xaa, | |
1557 | 0x55, 0x55, 0x55, | |
1558 | 0x55, 0x55, 0xff, | |
1559 | 0x55, 0xff, 0x55, | |
1560 | 0x55, 0xff, 0xff, | |
1561 | 0xff, 0x55, 0x55, | |
1562 | 0xff, 0x55, 0xff, | |
1563 | 0xff, 0xff, 0x55, | |
1564 | 0xff, 0xff, 0xff | |
1565 | }; | |
1566 | const unsigned char *clut; | |
1567 | ||
1568 | prom_printf("Looking for displays\n"); | |
1569 | for (node = 0; prom_next_node(&node); ) { | |
1570 | memset(type, 0, sizeof(type)); | |
1571 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1572 | if (strcmp(type, RELOC("display")) != 0) | |
1573 | continue; | |
1574 | ||
1575 | /* It seems OF doesn't null-terminate the path :-( */ | |
1576 | path = RELOC(prom_scratch); | |
1577 | memset(path, 0, PROM_SCRATCH_SIZE); | |
1578 | ||
1579 | /* | |
1580 | * leave some room at the end of the path for appending extra | |
1581 | * arguments | |
1582 | */ | |
1583 | if (call_prom("package-to-path", 3, 1, node, path, | |
1584 | PROM_SCRATCH_SIZE-10) == PROM_ERROR) | |
1585 | continue; | |
1586 | prom_printf("found display : %s, opening ... ", path); | |
1587 | ||
1588 | ih = call_prom("open", 1, 1, path); | |
1589 | if (ih == 0) { | |
1590 | prom_printf("failed\n"); | |
1591 | continue; | |
1592 | } | |
1593 | ||
1594 | /* Success */ | |
1595 | prom_printf("done\n"); | |
a23414be | 1596 | prom_setprop(node, path, "linux,opened", NULL, 0); |
9b6b563c PM |
1597 | |
1598 | /* Setup a usable color table when the appropriate | |
1599 | * method is available. Should update this to set-colors */ | |
1600 | clut = RELOC(default_colors); | |
1601 | for (i = 0; i < 32; i++, clut += 3) | |
1602 | if (prom_set_color(ih, i, clut[0], clut[1], | |
1603 | clut[2]) != 0) | |
1604 | break; | |
1605 | ||
1606 | #ifdef CONFIG_LOGO_LINUX_CLUT224 | |
1607 | clut = PTRRELOC(RELOC(logo_linux_clut224.clut)); | |
1608 | for (i = 0; i < RELOC(logo_linux_clut224.clutsize); i++, clut += 3) | |
1609 | if (prom_set_color(ih, i + 32, clut[0], clut[1], | |
1610 | clut[2]) != 0) | |
1611 | break; | |
1612 | #endif /* CONFIG_LOGO_LINUX_CLUT224 */ | |
9b6b563c PM |
1613 | } |
1614 | } | |
1615 | ||
1616 | ||
1617 | /* Return (relocated) pointer to this much memory: moves initrd if reqd. */ | |
1618 | static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end, | |
1619 | unsigned long needed, unsigned long align) | |
1620 | { | |
1621 | void *ret; | |
1622 | ||
1623 | *mem_start = _ALIGN(*mem_start, align); | |
1624 | while ((*mem_start + needed) > *mem_end) { | |
1625 | unsigned long room, chunk; | |
1626 | ||
1627 | prom_debug("Chunk exhausted, claiming more at %x...\n", | |
1628 | RELOC(alloc_bottom)); | |
1629 | room = RELOC(alloc_top) - RELOC(alloc_bottom); | |
1630 | if (room > DEVTREE_CHUNK_SIZE) | |
1631 | room = DEVTREE_CHUNK_SIZE; | |
1632 | if (room < PAGE_SIZE) | |
1633 | prom_panic("No memory for flatten_device_tree (no room)"); | |
1634 | chunk = alloc_up(room, 0); | |
1635 | if (chunk == 0) | |
1636 | prom_panic("No memory for flatten_device_tree (claim failed)"); | |
1637 | *mem_end = RELOC(alloc_top); | |
1638 | } | |
1639 | ||
1640 | ret = (void *)*mem_start; | |
1641 | *mem_start += needed; | |
1642 | ||
1643 | return ret; | |
1644 | } | |
1645 | ||
1646 | #define dt_push_token(token, mem_start, mem_end) \ | |
1647 | do { *((u32 *)make_room(mem_start, mem_end, 4, 4)) = token; } while(0) | |
1648 | ||
1649 | static unsigned long __init dt_find_string(char *str) | |
1650 | { | |
1651 | char *s, *os; | |
1652 | ||
1653 | s = os = (char *)RELOC(dt_string_start); | |
1654 | s += 4; | |
1655 | while (s < (char *)RELOC(dt_string_end)) { | |
1656 | if (strcmp(s, str) == 0) | |
1657 | return s - os; | |
1658 | s += strlen(s) + 1; | |
1659 | } | |
1660 | return 0; | |
1661 | } | |
1662 | ||
1663 | /* | |
1664 | * The Open Firmware 1275 specification states properties must be 31 bytes or | |
1665 | * less, however not all firmwares obey this. Make it 64 bytes to be safe. | |
1666 | */ | |
1667 | #define MAX_PROPERTY_NAME 64 | |
1668 | ||
1669 | static void __init scan_dt_build_strings(phandle node, | |
1670 | unsigned long *mem_start, | |
1671 | unsigned long *mem_end) | |
1672 | { | |
1673 | char *prev_name, *namep, *sstart; | |
1674 | unsigned long soff; | |
1675 | phandle child; | |
1676 | ||
1677 | sstart = (char *)RELOC(dt_string_start); | |
1678 | ||
1679 | /* get and store all property names */ | |
1680 | prev_name = RELOC(""); | |
1681 | for (;;) { | |
1682 | /* 64 is max len of name including nul. */ | |
1683 | namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1); | |
1684 | if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) { | |
1685 | /* No more nodes: unwind alloc */ | |
1686 | *mem_start = (unsigned long)namep; | |
1687 | break; | |
1688 | } | |
1689 | ||
1690 | /* skip "name" */ | |
1691 | if (strcmp(namep, RELOC("name")) == 0) { | |
1692 | *mem_start = (unsigned long)namep; | |
1693 | prev_name = RELOC("name"); | |
1694 | continue; | |
1695 | } | |
1696 | /* get/create string entry */ | |
1697 | soff = dt_find_string(namep); | |
1698 | if (soff != 0) { | |
1699 | *mem_start = (unsigned long)namep; | |
1700 | namep = sstart + soff; | |
1701 | } else { | |
1702 | /* Trim off some if we can */ | |
1703 | *mem_start = (unsigned long)namep + strlen(namep) + 1; | |
1704 | RELOC(dt_string_end) = *mem_start; | |
1705 | } | |
1706 | prev_name = namep; | |
1707 | } | |
1708 | ||
1709 | /* do all our children */ | |
1710 | child = call_prom("child", 1, 1, node); | |
1711 | while (child != 0) { | |
1712 | scan_dt_build_strings(child, mem_start, mem_end); | |
1713 | child = call_prom("peer", 1, 1, child); | |
1714 | } | |
1715 | } | |
1716 | ||
1717 | static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start, | |
1718 | unsigned long *mem_end) | |
1719 | { | |
1720 | phandle child; | |
1721 | char *namep, *prev_name, *sstart, *p, *ep, *lp, *path; | |
1722 | unsigned long soff; | |
1723 | unsigned char *valp; | |
1724 | static char pname[MAX_PROPERTY_NAME]; | |
c4988820 | 1725 | int l, room; |
9b6b563c PM |
1726 | |
1727 | dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end); | |
1728 | ||
1729 | /* get the node's full name */ | |
1730 | namep = (char *)*mem_start; | |
c4988820 PM |
1731 | room = *mem_end - *mem_start; |
1732 | if (room > 255) | |
1733 | room = 255; | |
1734 | l = call_prom("package-to-path", 3, 1, node, namep, room); | |
9b6b563c PM |
1735 | if (l >= 0) { |
1736 | /* Didn't fit? Get more room. */ | |
c4988820 PM |
1737 | if (l >= room) { |
1738 | if (l >= *mem_end - *mem_start) | |
1739 | namep = make_room(mem_start, mem_end, l+1, 1); | |
9b6b563c PM |
1740 | call_prom("package-to-path", 3, 1, node, namep, l); |
1741 | } | |
1742 | namep[l] = '\0'; | |
1743 | ||
1744 | /* Fixup an Apple bug where they have bogus \0 chars in the | |
a575b807 PM |
1745 | * middle of the path in some properties, and extract |
1746 | * the unit name (everything after the last '/'). | |
9b6b563c | 1747 | */ |
a575b807 | 1748 | for (lp = p = namep, ep = namep + l; p < ep; p++) { |
9b6b563c | 1749 | if (*p == '/') |
a575b807 PM |
1750 | lp = namep; |
1751 | else if (*p != 0) | |
1752 | *lp++ = *p; | |
1753 | } | |
1754 | *lp = 0; | |
1755 | *mem_start = _ALIGN((unsigned long)lp + 1, 4); | |
9b6b563c PM |
1756 | } |
1757 | ||
1758 | /* get it again for debugging */ | |
1759 | path = RELOC(prom_scratch); | |
1760 | memset(path, 0, PROM_SCRATCH_SIZE); | |
1761 | call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); | |
1762 | ||
1763 | /* get and store all properties */ | |
1764 | prev_name = RELOC(""); | |
1765 | sstart = (char *)RELOC(dt_string_start); | |
1766 | for (;;) { | |
1767 | if (call_prom("nextprop", 3, 1, node, prev_name, | |
1768 | RELOC(pname)) != 1) | |
1769 | break; | |
1770 | ||
1771 | /* skip "name" */ | |
1772 | if (strcmp(RELOC(pname), RELOC("name")) == 0) { | |
1773 | prev_name = RELOC("name"); | |
1774 | continue; | |
1775 | } | |
1776 | ||
1777 | /* find string offset */ | |
1778 | soff = dt_find_string(RELOC(pname)); | |
1779 | if (soff == 0) { | |
1780 | prom_printf("WARNING: Can't find string index for" | |
1781 | " <%s>, node %s\n", RELOC(pname), path); | |
1782 | break; | |
1783 | } | |
1784 | prev_name = sstart + soff; | |
1785 | ||
1786 | /* get length */ | |
1787 | l = call_prom("getproplen", 2, 1, node, RELOC(pname)); | |
1788 | ||
1789 | /* sanity checks */ | |
1790 | if (l == PROM_ERROR) | |
1791 | continue; | |
1792 | if (l > MAX_PROPERTY_LENGTH) { | |
1793 | prom_printf("WARNING: ignoring large property "); | |
1794 | /* It seems OF doesn't null-terminate the path :-( */ | |
1795 | prom_printf("[%s] ", path); | |
1796 | prom_printf("%s length 0x%x\n", RELOC(pname), l); | |
1797 | continue; | |
1798 | } | |
1799 | ||
1800 | /* push property head */ | |
1801 | dt_push_token(OF_DT_PROP, mem_start, mem_end); | |
1802 | dt_push_token(l, mem_start, mem_end); | |
1803 | dt_push_token(soff, mem_start, mem_end); | |
1804 | ||
1805 | /* push property content */ | |
1806 | valp = make_room(mem_start, mem_end, l, 4); | |
1807 | call_prom("getprop", 4, 1, node, RELOC(pname), valp, l); | |
1808 | *mem_start = _ALIGN(*mem_start, 4); | |
1809 | } | |
1810 | ||
1811 | /* Add a "linux,phandle" property. */ | |
1812 | soff = dt_find_string(RELOC("linux,phandle")); | |
1813 | if (soff == 0) | |
1814 | prom_printf("WARNING: Can't find string index for" | |
1815 | " <linux-phandle> node %s\n", path); | |
1816 | else { | |
1817 | dt_push_token(OF_DT_PROP, mem_start, mem_end); | |
1818 | dt_push_token(4, mem_start, mem_end); | |
1819 | dt_push_token(soff, mem_start, mem_end); | |
1820 | valp = make_room(mem_start, mem_end, 4, 4); | |
1821 | *(u32 *)valp = node; | |
1822 | } | |
1823 | ||
1824 | /* do all our children */ | |
1825 | child = call_prom("child", 1, 1, node); | |
1826 | while (child != 0) { | |
1827 | scan_dt_build_struct(child, mem_start, mem_end); | |
1828 | child = call_prom("peer", 1, 1, child); | |
1829 | } | |
1830 | ||
1831 | dt_push_token(OF_DT_END_NODE, mem_start, mem_end); | |
1832 | } | |
1833 | ||
1834 | static void __init flatten_device_tree(void) | |
1835 | { | |
1836 | phandle root; | |
1837 | unsigned long mem_start, mem_end, room; | |
1838 | struct boot_param_header *hdr; | |
1839 | struct prom_t *_prom = &RELOC(prom); | |
1840 | char *namep; | |
1841 | u64 *rsvmap; | |
1842 | ||
1843 | /* | |
1844 | * Check how much room we have between alloc top & bottom (+/- a | |
1845 | * few pages), crop to 4Mb, as this is our "chuck" size | |
1846 | */ | |
1847 | room = RELOC(alloc_top) - RELOC(alloc_bottom) - 0x4000; | |
1848 | if (room > DEVTREE_CHUNK_SIZE) | |
1849 | room = DEVTREE_CHUNK_SIZE; | |
1850 | prom_debug("starting device tree allocs at %x\n", RELOC(alloc_bottom)); | |
1851 | ||
1852 | /* Now try to claim that */ | |
1853 | mem_start = (unsigned long)alloc_up(room, PAGE_SIZE); | |
1854 | if (mem_start == 0) | |
1855 | prom_panic("Can't allocate initial device-tree chunk\n"); | |
1856 | mem_end = RELOC(alloc_top); | |
1857 | ||
1858 | /* Get root of tree */ | |
1859 | root = call_prom("peer", 1, 1, (phandle)0); | |
1860 | if (root == (phandle)0) | |
1861 | prom_panic ("couldn't get device tree root\n"); | |
1862 | ||
1863 | /* Build header and make room for mem rsv map */ | |
1864 | mem_start = _ALIGN(mem_start, 4); | |
1865 | hdr = make_room(&mem_start, &mem_end, | |
1866 | sizeof(struct boot_param_header), 4); | |
1867 | RELOC(dt_header_start) = (unsigned long)hdr; | |
1868 | rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8); | |
1869 | ||
1870 | /* Start of strings */ | |
1871 | mem_start = PAGE_ALIGN(mem_start); | |
1872 | RELOC(dt_string_start) = mem_start; | |
1873 | mem_start += 4; /* hole */ | |
1874 | ||
1875 | /* Add "linux,phandle" in there, we'll need it */ | |
1876 | namep = make_room(&mem_start, &mem_end, 16, 1); | |
1877 | strcpy(namep, RELOC("linux,phandle")); | |
1878 | mem_start = (unsigned long)namep + strlen(namep) + 1; | |
1879 | ||
1880 | /* Build string array */ | |
1881 | prom_printf("Building dt strings...\n"); | |
1882 | scan_dt_build_strings(root, &mem_start, &mem_end); | |
1883 | RELOC(dt_string_end) = mem_start; | |
1884 | ||
1885 | /* Build structure */ | |
1886 | mem_start = PAGE_ALIGN(mem_start); | |
1887 | RELOC(dt_struct_start) = mem_start; | |
1888 | prom_printf("Building dt structure...\n"); | |
1889 | scan_dt_build_struct(root, &mem_start, &mem_end); | |
1890 | dt_push_token(OF_DT_END, &mem_start, &mem_end); | |
1891 | RELOC(dt_struct_end) = PAGE_ALIGN(mem_start); | |
1892 | ||
1893 | /* Finish header */ | |
1894 | hdr->boot_cpuid_phys = _prom->cpu; | |
1895 | hdr->magic = OF_DT_HEADER; | |
1896 | hdr->totalsize = RELOC(dt_struct_end) - RELOC(dt_header_start); | |
1897 | hdr->off_dt_struct = RELOC(dt_struct_start) - RELOC(dt_header_start); | |
1898 | hdr->off_dt_strings = RELOC(dt_string_start) - RELOC(dt_header_start); | |
1899 | hdr->dt_strings_size = RELOC(dt_string_end) - RELOC(dt_string_start); | |
1900 | hdr->off_mem_rsvmap = ((unsigned long)rsvmap) - RELOC(dt_header_start); | |
1901 | hdr->version = OF_DT_VERSION; | |
1902 | /* Version 16 is not backward compatible */ | |
1903 | hdr->last_comp_version = 0x10; | |
1904 | ||
1905 | /* Reserve the whole thing and copy the reserve map in, we | |
1906 | * also bump mem_reserve_cnt to cause further reservations to | |
1907 | * fail since it's too late. | |
1908 | */ | |
1909 | reserve_mem(RELOC(dt_header_start), hdr->totalsize); | |
1910 | memcpy(rsvmap, RELOC(mem_reserve_map), sizeof(mem_reserve_map)); | |
1911 | ||
1912 | #ifdef DEBUG_PROM | |
1913 | { | |
1914 | int i; | |
1915 | prom_printf("reserved memory map:\n"); | |
1916 | for (i = 0; i < RELOC(mem_reserve_cnt); i++) | |
1917 | prom_printf(" %x - %x\n", | |
1918 | RELOC(mem_reserve_map)[i].base, | |
1919 | RELOC(mem_reserve_map)[i].size); | |
1920 | } | |
1921 | #endif | |
1922 | RELOC(mem_reserve_cnt) = MEM_RESERVE_MAP_SIZE; | |
1923 | ||
1924 | prom_printf("Device tree strings 0x%x -> 0x%x\n", | |
1925 | RELOC(dt_string_start), RELOC(dt_string_end)); | |
1926 | prom_printf("Device tree struct 0x%x -> 0x%x\n", | |
1927 | RELOC(dt_struct_start), RELOC(dt_struct_end)); | |
1928 | ||
1929 | } | |
1930 | ||
1931 | ||
1932 | static void __init fixup_device_tree(void) | |
1933 | { | |
1934 | #if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC) | |
1935 | phandle u3, i2c, mpic; | |
1936 | u32 u3_rev; | |
1937 | u32 interrupts[2]; | |
1938 | u32 parent; | |
1939 | ||
1940 | /* Some G5s have a missing interrupt definition, fix it up here */ | |
1941 | u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000")); | |
1942 | if (!PHANDLE_VALID(u3)) | |
1943 | return; | |
1944 | i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000")); | |
1945 | if (!PHANDLE_VALID(i2c)) | |
1946 | return; | |
1947 | mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000")); | |
1948 | if (!PHANDLE_VALID(mpic)) | |
1949 | return; | |
1950 | ||
1951 | /* check if proper rev of u3 */ | |
1952 | if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev)) | |
1953 | == PROM_ERROR) | |
1954 | return; | |
7d49697e | 1955 | if (u3_rev < 0x35 || u3_rev > 0x39) |
9b6b563c PM |
1956 | return; |
1957 | /* does it need fixup ? */ | |
1958 | if (prom_getproplen(i2c, "interrupts") > 0) | |
1959 | return; | |
1960 | ||
1961 | prom_printf("fixing up bogus interrupts for u3 i2c...\n"); | |
1962 | ||
1963 | /* interrupt on this revision of u3 is number 0 and level */ | |
1964 | interrupts[0] = 0; | |
1965 | interrupts[1] = 1; | |
a23414be PM |
1966 | prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts", |
1967 | &interrupts, sizeof(interrupts)); | |
9b6b563c | 1968 | parent = (u32)mpic; |
a23414be PM |
1969 | prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent", |
1970 | &parent, sizeof(parent)); | |
9b6b563c PM |
1971 | #endif |
1972 | } | |
1973 | ||
1974 | ||
1975 | static void __init prom_find_boot_cpu(void) | |
1976 | { | |
1977 | struct prom_t *_prom = &RELOC(prom); | |
1978 | u32 getprop_rval; | |
1979 | ihandle prom_cpu; | |
1980 | phandle cpu_pkg; | |
1981 | ||
a575b807 | 1982 | _prom->cpu = 0; |
9b6b563c | 1983 | if (prom_getprop(_prom->chosen, "cpu", &prom_cpu, sizeof(prom_cpu)) <= 0) |
a575b807 | 1984 | return; |
9b6b563c PM |
1985 | |
1986 | cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu); | |
1987 | ||
1988 | prom_getprop(cpu_pkg, "reg", &getprop_rval, sizeof(getprop_rval)); | |
1989 | _prom->cpu = getprop_rval; | |
1990 | ||
1991 | prom_debug("Booting CPU hw index = 0x%x\n", _prom->cpu); | |
1992 | } | |
1993 | ||
1994 | static void __init prom_check_initrd(unsigned long r3, unsigned long r4) | |
1995 | { | |
1996 | #ifdef CONFIG_BLK_DEV_INITRD | |
1997 | struct prom_t *_prom = &RELOC(prom); | |
1998 | ||
1999 | if (r3 && r4 && r4 != 0xdeadbeef) { | |
2000 | unsigned long val; | |
2001 | ||
51fae6de | 2002 | RELOC(prom_initrd_start) = is_kernel_addr(r3) ? __pa(r3) : r3; |
9b6b563c PM |
2003 | RELOC(prom_initrd_end) = RELOC(prom_initrd_start) + r4; |
2004 | ||
2005 | val = RELOC(prom_initrd_start); | |
a23414be PM |
2006 | prom_setprop(_prom->chosen, "/chosen", "linux,initrd-start", |
2007 | &val, sizeof(val)); | |
9b6b563c | 2008 | val = RELOC(prom_initrd_end); |
a23414be PM |
2009 | prom_setprop(_prom->chosen, "/chosen", "linux,initrd-end", |
2010 | &val, sizeof(val)); | |
9b6b563c PM |
2011 | |
2012 | reserve_mem(RELOC(prom_initrd_start), | |
2013 | RELOC(prom_initrd_end) - RELOC(prom_initrd_start)); | |
2014 | ||
2015 | prom_debug("initrd_start=0x%x\n", RELOC(prom_initrd_start)); | |
2016 | prom_debug("initrd_end=0x%x\n", RELOC(prom_initrd_end)); | |
2017 | } | |
2018 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
2019 | } | |
2020 | ||
2021 | /* | |
2022 | * We enter here early on, when the Open Firmware prom is still | |
2023 | * handling exceptions and the MMU hash table for us. | |
2024 | */ | |
2025 | ||
2026 | unsigned long __init prom_init(unsigned long r3, unsigned long r4, | |
2027 | unsigned long pp, | |
2028 | unsigned long r6, unsigned long r7) | |
2029 | { | |
2030 | struct prom_t *_prom; | |
9b6b563c PM |
2031 | unsigned long hdr; |
2032 | u32 getprop_rval; | |
b42b6617 | 2033 | unsigned long offset = reloc_offset(); |
9b6b563c PM |
2034 | |
2035 | #ifdef CONFIG_PPC32 | |
9b6b563c PM |
2036 | reloc_got2(offset); |
2037 | #endif | |
2038 | ||
2039 | _prom = &RELOC(prom); | |
2040 | ||
2041 | /* | |
2042 | * First zero the BSS | |
2043 | */ | |
2044 | memset(&RELOC(__bss_start), 0, __bss_stop - __bss_start); | |
2045 | ||
2046 | /* | |
2047 | * Init interface to Open Firmware, get some node references, | |
2048 | * like /chosen | |
2049 | */ | |
2050 | prom_init_client_services(pp); | |
2051 | ||
2052 | /* | |
a23414be PM |
2053 | * See if this OF is old enough that we need to do explicit maps |
2054 | * and other workarounds | |
9b6b563c | 2055 | */ |
a23414be | 2056 | prom_find_mmu(); |
9b6b563c | 2057 | |
a575b807 | 2058 | /* |
a23414be | 2059 | * Init prom stdout device |
a575b807 | 2060 | */ |
a23414be | 2061 | prom_init_stdout(); |
a575b807 | 2062 | |
cdc3ee8f ME |
2063 | /* Bail if this is a kdump kernel. */ |
2064 | if (PHYSICAL_START > 0) | |
2065 | prom_panic("Error: You can't boot a kdump kernel from OF!\n"); | |
2066 | ||
9b6b563c PM |
2067 | /* |
2068 | * Check for an initrd | |
2069 | */ | |
2070 | prom_check_initrd(r3, r4); | |
2071 | ||
2072 | /* | |
2073 | * Get default machine type. At this point, we do not differentiate | |
2074 | * between pSeries SMP and pSeries LPAR | |
2075 | */ | |
2076 | RELOC(of_platform) = prom_find_machine_type(); | |
2077 | getprop_rval = RELOC(of_platform); | |
a23414be | 2078 | prom_setprop(_prom->chosen, "/chosen", "linux,platform", |
9b6b563c PM |
2079 | &getprop_rval, sizeof(getprop_rval)); |
2080 | ||
2081 | #ifdef CONFIG_PPC_PSERIES | |
2082 | /* | |
2083 | * On pSeries, inform the firmware about our capabilities | |
2084 | */ | |
799d6046 PM |
2085 | if (RELOC(of_platform) == PLATFORM_PSERIES || |
2086 | RELOC(of_platform) == PLATFORM_PSERIES_LPAR) | |
9b6b563c PM |
2087 | prom_send_capabilities(); |
2088 | #endif | |
2089 | ||
9b6b563c | 2090 | /* |
f3f66f59 | 2091 | * Copy the CPU hold code |
9b6b563c | 2092 | */ |
55d36339 | 2093 | if (RELOC(of_platform) != PLATFORM_POWERMAC) |
5a408329 | 2094 | copy_and_flush(0, KERNELBASE + offset, 0x100, 0); |
9b6b563c PM |
2095 | |
2096 | /* | |
2097 | * Do early parsing of command line | |
2098 | */ | |
2099 | early_cmdline_parse(); | |
2100 | ||
2101 | /* | |
2102 | * Initialize memory management within prom_init | |
2103 | */ | |
2104 | prom_init_mem(); | |
2105 | ||
dcee3036 ME |
2106 | #ifdef CONFIG_KEXEC |
2107 | if (RELOC(prom_crashk_base)) | |
2108 | reserve_mem(RELOC(prom_crashk_base), RELOC(prom_crashk_size)); | |
2109 | #endif | |
9b6b563c PM |
2110 | /* |
2111 | * Determine which cpu is actually running right _now_ | |
2112 | */ | |
2113 | prom_find_boot_cpu(); | |
2114 | ||
2115 | /* | |
2116 | * Initialize display devices | |
2117 | */ | |
2118 | prom_check_displays(); | |
2119 | ||
2120 | #ifdef CONFIG_PPC64 | |
2121 | /* | |
2122 | * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else | |
2123 | * that uses the allocator, we need to make sure we get the top of memory | |
2124 | * available for us here... | |
2125 | */ | |
2126 | if (RELOC(of_platform) == PLATFORM_PSERIES) | |
2127 | prom_initialize_tce_table(); | |
2128 | #endif | |
2129 | ||
2130 | /* | |
2131 | * On non-powermacs, try to instantiate RTAS and puts all CPUs | |
2132 | * in spin-loops. PowerMacs don't have a working RTAS and use | |
2133 | * a different way to spin CPUs | |
2134 | */ | |
2135 | if (RELOC(of_platform) != PLATFORM_POWERMAC) { | |
2136 | prom_instantiate_rtas(); | |
2137 | prom_hold_cpus(); | |
2138 | } | |
2139 | ||
2140 | /* | |
2141 | * Fill in some infos for use by the kernel later on | |
2142 | */ | |
2143 | if (RELOC(prom_memory_limit)) | |
a23414be | 2144 | prom_setprop(_prom->chosen, "/chosen", "linux,memory-limit", |
9b6b563c PM |
2145 | &RELOC(prom_memory_limit), |
2146 | sizeof(prom_memory_limit)); | |
2147 | #ifdef CONFIG_PPC64 | |
2148 | if (RELOC(ppc64_iommu_off)) | |
a23414be PM |
2149 | prom_setprop(_prom->chosen, "/chosen", "linux,iommu-off", |
2150 | NULL, 0); | |
9b6b563c PM |
2151 | |
2152 | if (RELOC(iommu_force_on)) | |
a23414be PM |
2153 | prom_setprop(_prom->chosen, "/chosen", "linux,iommu-force-on", |
2154 | NULL, 0); | |
9b6b563c PM |
2155 | |
2156 | if (RELOC(prom_tce_alloc_start)) { | |
a23414be | 2157 | prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-start", |
9b6b563c PM |
2158 | &RELOC(prom_tce_alloc_start), |
2159 | sizeof(prom_tce_alloc_start)); | |
a23414be | 2160 | prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-end", |
9b6b563c PM |
2161 | &RELOC(prom_tce_alloc_end), |
2162 | sizeof(prom_tce_alloc_end)); | |
2163 | } | |
2164 | #endif | |
2165 | ||
dcee3036 ME |
2166 | #ifdef CONFIG_KEXEC |
2167 | if (RELOC(prom_crashk_base)) { | |
2168 | prom_setprop(_prom->chosen, "/chosen", "linux,crashkernel-base", | |
2169 | PTRRELOC(&prom_crashk_base), | |
2170 | sizeof(RELOC(prom_crashk_base))); | |
2171 | prom_setprop(_prom->chosen, "/chosen", "linux,crashkernel-size", | |
2172 | PTRRELOC(&prom_crashk_size), | |
2173 | sizeof(RELOC(prom_crashk_size))); | |
2174 | } | |
2175 | #endif | |
9b6b563c PM |
2176 | /* |
2177 | * Fixup any known bugs in the device-tree | |
2178 | */ | |
2179 | fixup_device_tree(); | |
2180 | ||
2181 | /* | |
2182 | * Now finally create the flattened device-tree | |
2183 | */ | |
2184 | prom_printf("copying OF device tree ...\n"); | |
2185 | flatten_device_tree(); | |
2186 | ||
3825ac0e PM |
2187 | /* |
2188 | * in case stdin is USB and still active on IBM machines... | |
2189 | * Unfortunately quiesce crashes on some powermacs if we have | |
2190 | * closed stdin already (in particular the powerbook 101). | |
2191 | */ | |
2192 | if (RELOC(of_platform) != PLATFORM_POWERMAC) | |
2193 | prom_close_stdin(); | |
9b6b563c PM |
2194 | |
2195 | /* | |
2196 | * Call OF "quiesce" method to shut down pending DMA's from | |
2197 | * devices etc... | |
2198 | */ | |
2199 | prom_printf("Calling quiesce ...\n"); | |
2200 | call_prom("quiesce", 0, 0); | |
2201 | ||
2202 | /* | |
2203 | * And finally, call the kernel passing it the flattened device | |
2204 | * tree and NULL as r5, thus triggering the new entry point which | |
2205 | * is common to us and kexec | |
2206 | */ | |
2207 | hdr = RELOC(dt_header_start); | |
2208 | prom_printf("returning from prom_init\n"); | |
2209 | prom_debug("->dt_header_start=0x%x\n", hdr); | |
2210 | ||
2211 | #ifdef CONFIG_PPC32 | |
2212 | reloc_got2(-offset); | |
2213 | #endif | |
2214 | ||
35499c01 | 2215 | __start(hdr, KERNELBASE + offset, 0); |
9b6b563c PM |
2216 | |
2217 | return 0; | |
2218 | } |