Commit | Line | Data |
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9b6b563c PM |
1 | /* |
2 | * Procedures for interfacing to Open Firmware. | |
3 | * | |
4 | * Paul Mackerras August 1996. | |
5 | * Copyright (C) 1996-2005 Paul Mackerras. | |
6 | * | |
7 | * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner. | |
8 | * {engebret|bergner}@us.ibm.com | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License | |
12 | * as published by the Free Software Foundation; either version | |
13 | * 2 of the License, or (at your option) any later version. | |
14 | */ | |
15 | ||
16 | #undef DEBUG_PROM | |
17 | ||
18 | #include <stdarg.h> | |
9b6b563c PM |
19 | #include <linux/kernel.h> |
20 | #include <linux/string.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/threads.h> | |
23 | #include <linux/spinlock.h> | |
24 | #include <linux/types.h> | |
25 | #include <linux/pci.h> | |
26 | #include <linux/proc_fs.h> | |
27 | #include <linux/stringify.h> | |
28 | #include <linux/delay.h> | |
29 | #include <linux/initrd.h> | |
30 | #include <linux/bitops.h> | |
31 | #include <asm/prom.h> | |
32 | #include <asm/rtas.h> | |
33 | #include <asm/page.h> | |
34 | #include <asm/processor.h> | |
35 | #include <asm/irq.h> | |
36 | #include <asm/io.h> | |
37 | #include <asm/smp.h> | |
38 | #include <asm/system.h> | |
39 | #include <asm/mmu.h> | |
40 | #include <asm/pgtable.h> | |
41 | #include <asm/pci.h> | |
42 | #include <asm/iommu.h> | |
9b6b563c PM |
43 | #include <asm/btext.h> |
44 | #include <asm/sections.h> | |
45 | #include <asm/machdep.h> | |
46 | ||
9b6b563c | 47 | #include <linux/linux_logo.h> |
9b6b563c PM |
48 | |
49 | /* | |
50 | * Properties whose value is longer than this get excluded from our | |
51 | * copy of the device tree. This value does need to be big enough to | |
52 | * ensure that we don't lose things like the interrupt-map property | |
53 | * on a PCI-PCI bridge. | |
54 | */ | |
55 | #define MAX_PROPERTY_LENGTH (1UL * 1024 * 1024) | |
56 | ||
57 | /* | |
58 | * Eventually bump that one up | |
59 | */ | |
60 | #define DEVTREE_CHUNK_SIZE 0x100000 | |
61 | ||
62 | /* | |
63 | * This is the size of the local memory reserve map that gets copied | |
64 | * into the boot params passed to the kernel. That size is totally | |
65 | * flexible as the kernel just reads the list until it encounters an | |
66 | * entry with size 0, so it can be changed without breaking binary | |
67 | * compatibility | |
68 | */ | |
69 | #define MEM_RESERVE_MAP_SIZE 8 | |
70 | ||
71 | /* | |
72 | * prom_init() is called very early on, before the kernel text | |
73 | * and data have been mapped to KERNELBASE. At this point the code | |
74 | * is running at whatever address it has been loaded at. | |
75 | * On ppc32 we compile with -mrelocatable, which means that references | |
76 | * to extern and static variables get relocated automatically. | |
77 | * On ppc64 we have to relocate the references explicitly with | |
78 | * RELOC. (Note that strings count as static variables.) | |
79 | * | |
80 | * Because OF may have mapped I/O devices into the area starting at | |
81 | * KERNELBASE, particularly on CHRP machines, we can't safely call | |
82 | * OF once the kernel has been mapped to KERNELBASE. Therefore all | |
83 | * OF calls must be done within prom_init(). | |
84 | * | |
85 | * ADDR is used in calls to call_prom. The 4th and following | |
86 | * arguments to call_prom should be 32-bit values. | |
87 | * On ppc64, 64 bit values are truncated to 32 bits (and | |
88 | * fortunately don't get interpreted as two arguments). | |
89 | */ | |
90 | #ifdef CONFIG_PPC64 | |
91 | #define RELOC(x) (*PTRRELOC(&(x))) | |
92 | #define ADDR(x) (u32) add_reloc_offset((unsigned long)(x)) | |
a23414be | 93 | #define OF_WORKAROUNDS 0 |
9b6b563c PM |
94 | #else |
95 | #define RELOC(x) (x) | |
96 | #define ADDR(x) (u32) (x) | |
a23414be PM |
97 | #define OF_WORKAROUNDS of_workarounds |
98 | int of_workarounds; | |
9b6b563c PM |
99 | #endif |
100 | ||
a23414be PM |
101 | #define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */ |
102 | #define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */ | |
103 | ||
9b6b563c PM |
104 | #define PROM_BUG() do { \ |
105 | prom_printf("kernel BUG at %s line 0x%x!\n", \ | |
106 | RELOC(__FILE__), __LINE__); \ | |
107 | __asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \ | |
108 | } while (0) | |
109 | ||
110 | #ifdef DEBUG_PROM | |
111 | #define prom_debug(x...) prom_printf(x) | |
112 | #else | |
113 | #define prom_debug(x...) | |
114 | #endif | |
115 | ||
9b6b563c PM |
116 | |
117 | typedef u32 prom_arg_t; | |
118 | ||
119 | struct prom_args { | |
120 | u32 service; | |
121 | u32 nargs; | |
122 | u32 nret; | |
123 | prom_arg_t args[10]; | |
124 | }; | |
125 | ||
126 | struct prom_t { | |
127 | ihandle root; | |
a23414be | 128 | phandle chosen; |
9b6b563c PM |
129 | int cpu; |
130 | ihandle stdout; | |
a575b807 | 131 | ihandle mmumap; |
a23414be | 132 | ihandle memory; |
9b6b563c PM |
133 | }; |
134 | ||
135 | struct mem_map_entry { | |
cbbcf340 KG |
136 | u64 base; |
137 | u64 size; | |
9b6b563c PM |
138 | }; |
139 | ||
140 | typedef u32 cell_t; | |
141 | ||
142 | extern void __start(unsigned long r3, unsigned long r4, unsigned long r5); | |
143 | ||
144 | #ifdef CONFIG_PPC64 | |
c4988820 | 145 | extern int enter_prom(struct prom_args *args, unsigned long entry); |
9b6b563c | 146 | #else |
c4988820 | 147 | static inline int enter_prom(struct prom_args *args, unsigned long entry) |
9b6b563c | 148 | { |
c4988820 | 149 | return ((int (*)(struct prom_args *))entry)(args); |
9b6b563c PM |
150 | } |
151 | #endif | |
152 | ||
153 | extern void copy_and_flush(unsigned long dest, unsigned long src, | |
154 | unsigned long size, unsigned long offset); | |
155 | ||
156 | /* prom structure */ | |
157 | static struct prom_t __initdata prom; | |
158 | ||
159 | static unsigned long prom_entry __initdata; | |
160 | ||
161 | #define PROM_SCRATCH_SIZE 256 | |
162 | ||
163 | static char __initdata of_stdout_device[256]; | |
164 | static char __initdata prom_scratch[PROM_SCRATCH_SIZE]; | |
165 | ||
166 | static unsigned long __initdata dt_header_start; | |
167 | static unsigned long __initdata dt_struct_start, dt_struct_end; | |
168 | static unsigned long __initdata dt_string_start, dt_string_end; | |
169 | ||
170 | static unsigned long __initdata prom_initrd_start, prom_initrd_end; | |
171 | ||
172 | #ifdef CONFIG_PPC64 | |
165785e5 JK |
173 | static int __initdata prom_iommu_force_on; |
174 | static int __initdata prom_iommu_off; | |
9b6b563c PM |
175 | static unsigned long __initdata prom_tce_alloc_start; |
176 | static unsigned long __initdata prom_tce_alloc_end; | |
177 | #endif | |
178 | ||
e8222502 BH |
179 | /* Platforms codes are now obsolete in the kernel. Now only used within this |
180 | * file and ultimately gone too. Feel free to change them if you need, they | |
181 | * are not shared with anything outside of this file anymore | |
182 | */ | |
183 | #define PLATFORM_PSERIES 0x0100 | |
184 | #define PLATFORM_PSERIES_LPAR 0x0101 | |
185 | #define PLATFORM_LPAR 0x0001 | |
186 | #define PLATFORM_POWERMAC 0x0400 | |
187 | #define PLATFORM_GENERIC 0x0500 | |
188 | ||
9b6b563c PM |
189 | static int __initdata of_platform; |
190 | ||
191 | static char __initdata prom_cmd_line[COMMAND_LINE_SIZE]; | |
192 | ||
cf68787b BK |
193 | static unsigned long __initdata prom_memory_limit; |
194 | ||
9b6b563c PM |
195 | static unsigned long __initdata alloc_top; |
196 | static unsigned long __initdata alloc_top_high; | |
197 | static unsigned long __initdata alloc_bottom; | |
198 | static unsigned long __initdata rmo_top; | |
199 | static unsigned long __initdata ram_top; | |
200 | ||
201 | static struct mem_map_entry __initdata mem_reserve_map[MEM_RESERVE_MAP_SIZE]; | |
202 | static int __initdata mem_reserve_cnt; | |
203 | ||
204 | static cell_t __initdata regbuf[1024]; | |
205 | ||
206 | ||
9b6b563c PM |
207 | /* |
208 | * Error results ... some OF calls will return "-1" on error, some | |
209 | * will return 0, some will return either. To simplify, here are | |
210 | * macros to use with any ihandle or phandle return value to check if | |
211 | * it is valid | |
212 | */ | |
213 | ||
214 | #define PROM_ERROR (-1u) | |
215 | #define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR) | |
216 | #define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR) | |
217 | ||
218 | ||
219 | /* This is the one and *ONLY* place where we actually call open | |
220 | * firmware. | |
221 | */ | |
222 | ||
223 | static int __init call_prom(const char *service, int nargs, int nret, ...) | |
224 | { | |
225 | int i; | |
226 | struct prom_args args; | |
227 | va_list list; | |
228 | ||
229 | args.service = ADDR(service); | |
230 | args.nargs = nargs; | |
231 | args.nret = nret; | |
232 | ||
233 | va_start(list, nret); | |
234 | for (i = 0; i < nargs; i++) | |
235 | args.args[i] = va_arg(list, prom_arg_t); | |
236 | va_end(list); | |
237 | ||
238 | for (i = 0; i < nret; i++) | |
239 | args.args[nargs+i] = 0; | |
240 | ||
c4988820 PM |
241 | if (enter_prom(&args, RELOC(prom_entry)) < 0) |
242 | return PROM_ERROR; | |
9b6b563c PM |
243 | |
244 | return (nret > 0) ? args.args[nargs] : 0; | |
245 | } | |
246 | ||
247 | static int __init call_prom_ret(const char *service, int nargs, int nret, | |
248 | prom_arg_t *rets, ...) | |
249 | { | |
250 | int i; | |
251 | struct prom_args args; | |
252 | va_list list; | |
253 | ||
254 | args.service = ADDR(service); | |
255 | args.nargs = nargs; | |
256 | args.nret = nret; | |
257 | ||
258 | va_start(list, rets); | |
259 | for (i = 0; i < nargs; i++) | |
260 | args.args[i] = va_arg(list, prom_arg_t); | |
261 | va_end(list); | |
262 | ||
263 | for (i = 0; i < nret; i++) | |
ed1189b7 | 264 | args.args[nargs+i] = 0; |
9b6b563c | 265 | |
c4988820 PM |
266 | if (enter_prom(&args, RELOC(prom_entry)) < 0) |
267 | return PROM_ERROR; | |
9b6b563c PM |
268 | |
269 | if (rets != NULL) | |
270 | for (i = 1; i < nret; ++i) | |
c5200c90 | 271 | rets[i-1] = args.args[nargs+i]; |
9b6b563c PM |
272 | |
273 | return (nret > 0) ? args.args[nargs] : 0; | |
274 | } | |
275 | ||
276 | ||
9b6b563c PM |
277 | static void __init prom_print(const char *msg) |
278 | { | |
279 | const char *p, *q; | |
280 | struct prom_t *_prom = &RELOC(prom); | |
281 | ||
282 | if (_prom->stdout == 0) | |
283 | return; | |
284 | ||
285 | for (p = msg; *p != 0; p = q) { | |
286 | for (q = p; *q != 0 && *q != '\n'; ++q) | |
287 | ; | |
288 | if (q > p) | |
289 | call_prom("write", 3, 1, _prom->stdout, p, q - p); | |
290 | if (*q == 0) | |
291 | break; | |
292 | ++q; | |
293 | call_prom("write", 3, 1, _prom->stdout, ADDR("\r\n"), 2); | |
294 | } | |
295 | } | |
296 | ||
297 | ||
298 | static void __init prom_print_hex(unsigned long val) | |
299 | { | |
300 | int i, nibbles = sizeof(val)*2; | |
301 | char buf[sizeof(val)*2+1]; | |
302 | struct prom_t *_prom = &RELOC(prom); | |
303 | ||
304 | for (i = nibbles-1; i >= 0; i--) { | |
305 | buf[i] = (val & 0xf) + '0'; | |
306 | if (buf[i] > '9') | |
307 | buf[i] += ('a'-'0'-10); | |
308 | val >>= 4; | |
309 | } | |
310 | buf[nibbles] = '\0'; | |
311 | call_prom("write", 3, 1, _prom->stdout, buf, nibbles); | |
312 | } | |
313 | ||
2c48a7d6 MN |
314 | /* max number of decimal digits in an unsigned long */ |
315 | #define UL_DIGITS 21 | |
316 | static void __init prom_print_dec(unsigned long val) | |
317 | { | |
318 | int i, size; | |
319 | char buf[UL_DIGITS+1]; | |
320 | struct prom_t *_prom = &RELOC(prom); | |
321 | ||
322 | for (i = UL_DIGITS-1; i >= 0; i--) { | |
323 | buf[i] = (val % 10) + '0'; | |
324 | val = val/10; | |
325 | if (val == 0) | |
326 | break; | |
327 | } | |
328 | /* shift stuff down */ | |
329 | size = UL_DIGITS - i; | |
330 | call_prom("write", 3, 1, _prom->stdout, buf+i, size); | |
331 | } | |
9b6b563c PM |
332 | |
333 | static void __init prom_printf(const char *format, ...) | |
334 | { | |
335 | const char *p, *q, *s; | |
336 | va_list args; | |
337 | unsigned long v; | |
338 | struct prom_t *_prom = &RELOC(prom); | |
339 | ||
340 | va_start(args, format); | |
341 | #ifdef CONFIG_PPC64 | |
342 | format = PTRRELOC(format); | |
343 | #endif | |
344 | for (p = format; *p != 0; p = q) { | |
345 | for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q) | |
346 | ; | |
347 | if (q > p) | |
348 | call_prom("write", 3, 1, _prom->stdout, p, q - p); | |
349 | if (*q == 0) | |
350 | break; | |
351 | if (*q == '\n') { | |
352 | ++q; | |
353 | call_prom("write", 3, 1, _prom->stdout, | |
354 | ADDR("\r\n"), 2); | |
355 | continue; | |
356 | } | |
357 | ++q; | |
358 | if (*q == 0) | |
359 | break; | |
360 | switch (*q) { | |
361 | case 's': | |
362 | ++q; | |
363 | s = va_arg(args, const char *); | |
364 | prom_print(s); | |
365 | break; | |
366 | case 'x': | |
367 | ++q; | |
368 | v = va_arg(args, unsigned long); | |
369 | prom_print_hex(v); | |
370 | break; | |
2c48a7d6 MN |
371 | case 'l': |
372 | ++q; | |
373 | if (*q == 'u') { /* '%lu' */ | |
374 | ++q; | |
375 | v = va_arg(args, unsigned long); | |
376 | prom_print_dec(v); | |
377 | } | |
378 | break; | |
9b6b563c PM |
379 | } |
380 | } | |
381 | } | |
382 | ||
383 | ||
a575b807 PM |
384 | static unsigned int __init prom_claim(unsigned long virt, unsigned long size, |
385 | unsigned long align) | |
386 | { | |
a575b807 PM |
387 | struct prom_t *_prom = &RELOC(prom); |
388 | ||
a23414be PM |
389 | if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) { |
390 | /* | |
391 | * Old OF requires we claim physical and virtual separately | |
392 | * and then map explicitly (assuming virtual mode) | |
393 | */ | |
394 | int ret; | |
395 | prom_arg_t result; | |
396 | ||
397 | ret = call_prom_ret("call-method", 5, 2, &result, | |
398 | ADDR("claim"), _prom->memory, | |
399 | align, size, virt); | |
400 | if (ret != 0 || result == -1) | |
401 | return -1; | |
402 | ret = call_prom_ret("call-method", 5, 2, &result, | |
403 | ADDR("claim"), _prom->mmumap, | |
404 | align, size, virt); | |
405 | if (ret != 0) { | |
406 | call_prom("call-method", 4, 1, ADDR("release"), | |
407 | _prom->memory, size, virt); | |
408 | return -1; | |
409 | } | |
410 | /* the 0x12 is M (coherence) + PP == read/write */ | |
a575b807 | 411 | call_prom("call-method", 6, 1, |
a23414be PM |
412 | ADDR("map"), _prom->mmumap, 0x12, size, virt, virt); |
413 | return virt; | |
414 | } | |
415 | return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size, | |
416 | (prom_arg_t)align); | |
a575b807 PM |
417 | } |
418 | ||
9b6b563c PM |
419 | static void __init __attribute__((noreturn)) prom_panic(const char *reason) |
420 | { | |
421 | #ifdef CONFIG_PPC64 | |
422 | reason = PTRRELOC(reason); | |
423 | #endif | |
424 | prom_print(reason); | |
add60ef3 OH |
425 | /* Do not call exit because it clears the screen on pmac |
426 | * it also causes some sort of double-fault on early pmacs */ | |
427 | if (RELOC(of_platform) == PLATFORM_POWERMAC) | |
428 | asm("trap\n"); | |
429 | ||
9b6b563c PM |
430 | /* ToDo: should put up an SRC here on p/iSeries */ |
431 | call_prom("exit", 0, 0); | |
432 | ||
433 | for (;;) /* should never get here */ | |
434 | ; | |
435 | } | |
436 | ||
437 | ||
438 | static int __init prom_next_node(phandle *nodep) | |
439 | { | |
440 | phandle node; | |
441 | ||
442 | if ((node = *nodep) != 0 | |
443 | && (*nodep = call_prom("child", 1, 1, node)) != 0) | |
444 | return 1; | |
445 | if ((*nodep = call_prom("peer", 1, 1, node)) != 0) | |
446 | return 1; | |
447 | for (;;) { | |
448 | if ((node = call_prom("parent", 1, 1, node)) == 0) | |
449 | return 0; | |
450 | if ((*nodep = call_prom("peer", 1, 1, node)) != 0) | |
451 | return 1; | |
452 | } | |
453 | } | |
454 | ||
21fe3301 | 455 | static int inline prom_getprop(phandle node, const char *pname, |
9b6b563c PM |
456 | void *value, size_t valuelen) |
457 | { | |
458 | return call_prom("getprop", 4, 1, node, ADDR(pname), | |
459 | (u32)(unsigned long) value, (u32) valuelen); | |
460 | } | |
461 | ||
21fe3301 | 462 | static int inline prom_getproplen(phandle node, const char *pname) |
9b6b563c PM |
463 | { |
464 | return call_prom("getproplen", 2, 1, node, ADDR(pname)); | |
465 | } | |
466 | ||
a23414be | 467 | static void add_string(char **str, const char *q) |
9b6b563c | 468 | { |
a23414be PM |
469 | char *p = *str; |
470 | ||
471 | while (*q) | |
472 | *p++ = *q++; | |
473 | *p++ = ' '; | |
474 | *str = p; | |
475 | } | |
476 | ||
477 | static char *tohex(unsigned int x) | |
478 | { | |
479 | static char digits[] = "0123456789abcdef"; | |
480 | static char result[9]; | |
481 | int i; | |
482 | ||
483 | result[8] = 0; | |
484 | i = 8; | |
485 | do { | |
486 | --i; | |
487 | result[i] = digits[x & 0xf]; | |
488 | x >>= 4; | |
489 | } while (x != 0 && i > 0); | |
490 | return &result[i]; | |
491 | } | |
492 | ||
493 | static int __init prom_setprop(phandle node, const char *nodename, | |
494 | const char *pname, void *value, size_t valuelen) | |
495 | { | |
496 | char cmd[256], *p; | |
497 | ||
498 | if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL)) | |
499 | return call_prom("setprop", 4, 1, node, ADDR(pname), | |
500 | (u32)(unsigned long) value, (u32) valuelen); | |
501 | ||
502 | /* gah... setprop doesn't work on longtrail, have to use interpret */ | |
503 | p = cmd; | |
504 | add_string(&p, "dev"); | |
505 | add_string(&p, nodename); | |
506 | add_string(&p, tohex((u32)(unsigned long) value)); | |
507 | add_string(&p, tohex(valuelen)); | |
508 | add_string(&p, tohex(ADDR(pname))); | |
509 | add_string(&p, tohex(strlen(RELOC(pname)))); | |
510 | add_string(&p, "property"); | |
511 | *p = 0; | |
512 | return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd); | |
9b6b563c PM |
513 | } |
514 | ||
cf68787b BK |
515 | /* We can't use the standard versions because of RELOC headaches. */ |
516 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ | |
517 | || ('a' <= (c) && (c) <= 'f') \ | |
518 | || ('A' <= (c) && (c) <= 'F')) | |
519 | ||
520 | #define isdigit(c) ('0' <= (c) && (c) <= '9') | |
521 | #define islower(c) ('a' <= (c) && (c) <= 'z') | |
522 | #define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c)) | |
523 | ||
524 | unsigned long prom_strtoul(const char *cp, const char **endp) | |
525 | { | |
526 | unsigned long result = 0, base = 10, value; | |
527 | ||
528 | if (*cp == '0') { | |
529 | base = 8; | |
530 | cp++; | |
531 | if (toupper(*cp) == 'X') { | |
532 | cp++; | |
533 | base = 16; | |
534 | } | |
535 | } | |
536 | ||
537 | while (isxdigit(*cp) && | |
538 | (value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) { | |
539 | result = result * base + value; | |
540 | cp++; | |
541 | } | |
542 | ||
543 | if (endp) | |
544 | *endp = cp; | |
545 | ||
546 | return result; | |
547 | } | |
548 | ||
549 | unsigned long prom_memparse(const char *ptr, const char **retptr) | |
550 | { | |
551 | unsigned long ret = prom_strtoul(ptr, retptr); | |
552 | int shift = 0; | |
553 | ||
554 | /* | |
555 | * We can't use a switch here because GCC *may* generate a | |
556 | * jump table which won't work, because we're not running at | |
557 | * the address we're linked at. | |
558 | */ | |
559 | if ('G' == **retptr || 'g' == **retptr) | |
560 | shift = 30; | |
561 | ||
562 | if ('M' == **retptr || 'm' == **retptr) | |
563 | shift = 20; | |
564 | ||
565 | if ('K' == **retptr || 'k' == **retptr) | |
566 | shift = 10; | |
567 | ||
568 | if (shift) { | |
569 | ret <<= shift; | |
570 | (*retptr)++; | |
571 | } | |
572 | ||
573 | return ret; | |
574 | } | |
575 | ||
9b6b563c PM |
576 | /* |
577 | * Early parsing of the command line passed to the kernel, used for | |
578 | * "mem=x" and the options that affect the iommu | |
579 | */ | |
580 | static void __init early_cmdline_parse(void) | |
581 | { | |
582 | struct prom_t *_prom = &RELOC(prom); | |
cc5d0189 | 583 | const char *opt; |
cf68787b | 584 | |
cc5d0189 | 585 | char *p; |
9b6b563c PM |
586 | int l = 0; |
587 | ||
588 | RELOC(prom_cmd_line[0]) = 0; | |
589 | p = RELOC(prom_cmd_line); | |
590 | if ((long)_prom->chosen > 0) | |
591 | l = prom_getprop(_prom->chosen, "bootargs", p, COMMAND_LINE_SIZE-1); | |
592 | #ifdef CONFIG_CMDLINE | |
0e4aa9c2 | 593 | if (l <= 0 || p[0] == '\0') /* dbl check */ |
9b6b563c PM |
594 | strlcpy(RELOC(prom_cmd_line), |
595 | RELOC(CONFIG_CMDLINE), sizeof(prom_cmd_line)); | |
596 | #endif /* CONFIG_CMDLINE */ | |
597 | prom_printf("command line: %s\n", RELOC(prom_cmd_line)); | |
598 | ||
599 | #ifdef CONFIG_PPC64 | |
600 | opt = strstr(RELOC(prom_cmd_line), RELOC("iommu=")); | |
601 | if (opt) { | |
602 | prom_printf("iommu opt is: %s\n", opt); | |
603 | opt += 6; | |
604 | while (*opt && *opt == ' ') | |
605 | opt++; | |
606 | if (!strncmp(opt, RELOC("off"), 3)) | |
165785e5 | 607 | RELOC(prom_iommu_off) = 1; |
9b6b563c | 608 | else if (!strncmp(opt, RELOC("force"), 5)) |
165785e5 | 609 | RELOC(prom_iommu_force_on) = 1; |
9b6b563c PM |
610 | } |
611 | #endif | |
cf68787b BK |
612 | opt = strstr(RELOC(prom_cmd_line), RELOC("mem=")); |
613 | if (opt) { | |
614 | opt += 4; | |
615 | RELOC(prom_memory_limit) = prom_memparse(opt, (const char **)&opt); | |
616 | #ifdef CONFIG_PPC64 | |
617 | /* Align to 16 MB == size of ppc64 large page */ | |
618 | RELOC(prom_memory_limit) = ALIGN(RELOC(prom_memory_limit), 0x1000000); | |
619 | #endif | |
620 | } | |
9b6b563c PM |
621 | } |
622 | ||
623 | #ifdef CONFIG_PPC_PSERIES | |
624 | /* | |
f709bfac PM |
625 | * There are two methods for telling firmware what our capabilities are. |
626 | * Newer machines have an "ibm,client-architecture-support" method on the | |
627 | * root node. For older machines, we have to call the "process-elf-header" | |
628 | * method in the /packages/elf-loader node, passing it a fake 32-bit | |
629 | * ELF header containing a couple of PT_NOTE sections that contain | |
630 | * structures that contain various information. | |
9b6b563c | 631 | */ |
f709bfac PM |
632 | |
633 | /* | |
634 | * New method - extensible architecture description vector. | |
635 | * | |
636 | * Because the description vector contains a mix of byte and word | |
637 | * values, we declare it as an unsigned char array, and use this | |
638 | * macro to put word values in. | |
639 | */ | |
640 | #define W(x) ((x) >> 24) & 0xff, ((x) >> 16) & 0xff, \ | |
641 | ((x) >> 8) & 0xff, (x) & 0xff | |
642 | ||
643 | /* Option vector bits - generic bits in byte 1 */ | |
644 | #define OV_IGNORE 0x80 /* ignore this vector */ | |
645 | #define OV_CESSATION_POLICY 0x40 /* halt if unsupported option present*/ | |
646 | ||
647 | /* Option vector 1: processor architectures supported */ | |
648 | #define OV1_PPC_2_00 0x80 /* set if we support PowerPC 2.00 */ | |
649 | #define OV1_PPC_2_01 0x40 /* set if we support PowerPC 2.01 */ | |
650 | #define OV1_PPC_2_02 0x20 /* set if we support PowerPC 2.02 */ | |
651 | #define OV1_PPC_2_03 0x10 /* set if we support PowerPC 2.03 */ | |
652 | #define OV1_PPC_2_04 0x08 /* set if we support PowerPC 2.04 */ | |
653 | #define OV1_PPC_2_05 0x04 /* set if we support PowerPC 2.05 */ | |
0cb99013 | 654 | #define OV1_PPC_2_06 0x02 /* set if we support PowerPC 2.06 */ |
f709bfac PM |
655 | |
656 | /* Option vector 2: Open Firmware options supported */ | |
657 | #define OV2_REAL_MODE 0x20 /* set if we want OF in real mode */ | |
658 | ||
659 | /* Option vector 3: processor options supported */ | |
660 | #define OV3_FP 0x80 /* floating point */ | |
661 | #define OV3_VMX 0x40 /* VMX/Altivec */ | |
974a76f5 | 662 | #define OV3_DFP 0x20 /* decimal FP */ |
f709bfac PM |
663 | |
664 | /* Option vector 5: PAPR/OF options supported */ | |
665 | #define OV5_LPAR 0x80 /* logical partitioning supported */ | |
666 | #define OV5_SPLPAR 0x40 /* shared-processor LPAR supported */ | |
667 | /* ibm,dynamic-reconfiguration-memory property supported */ | |
668 | #define OV5_DRCONF_MEMORY 0x20 | |
669 | #define OV5_LARGE_PAGES 0x10 /* large pages supported */ | |
d8c391a5 | 670 | #define OV5_DONATE_DEDICATE_CPU 0x02 /* donate dedicated CPU support */ |
014dad90 ME |
671 | /* PCIe/MSI support. Without MSI full PCIe is not supported */ |
672 | #ifdef CONFIG_PCI_MSI | |
673 | #define OV5_MSI 0x01 /* PCIe/MSI support */ | |
674 | #else | |
675 | #define OV5_MSI 0x00 | |
676 | #endif /* CONFIG_PCI_MSI */ | |
8391e42a NF |
677 | #ifdef CONFIG_PPC_SMLPAR |
678 | #define OV5_CMO 0x80 /* Cooperative Memory Overcommitment */ | |
679 | #else | |
680 | #define OV5_CMO 0x00 | |
681 | #endif | |
4b83c330 | 682 | #define OV5_TYPE1_AFFINITY 0x80 /* Type 1 NUMA affinity */ |
f709bfac | 683 | |
28bb9ee1 | 684 | /* Option Vector 6: IBM PAPR hints */ |
685 | #define OV6_LINUX 0x02 /* Linux is our OS */ | |
686 | ||
f709bfac PM |
687 | /* |
688 | * The architecture vector has an array of PVR mask/value pairs, | |
689 | * followed by # option vectors - 1, followed by the option vectors. | |
690 | */ | |
691 | static unsigned char ibm_architecture_vec[] = { | |
692 | W(0xfffe0000), W(0x003a0000), /* POWER5/POWER5+ */ | |
03054d51 | 693 | W(0xffff0000), W(0x003e0000), /* POWER6 */ |
e952e6c4 | 694 | W(0xffff0000), W(0x003f0000), /* POWER7 */ |
0cb99013 | 695 | W(0xffffffff), W(0x0f000003), /* all 2.06-compliant */ |
0efbc18a | 696 | W(0xffffffff), W(0x0f000002), /* all 2.05-compliant */ |
f709bfac | 697 | W(0xfffffffe), W(0x0f000001), /* all 2.04-compliant and earlier */ |
28bb9ee1 | 698 | 6 - 1, /* 6 option vectors */ |
f709bfac PM |
699 | |
700 | /* option vector 1: processor architectures supported */ | |
11e9ed43 | 701 | 3 - 2, /* length */ |
f709bfac PM |
702 | 0, /* don't ignore, don't halt */ |
703 | OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 | | |
0cb99013 | 704 | OV1_PPC_2_04 | OV1_PPC_2_05 | OV1_PPC_2_06, |
f709bfac PM |
705 | |
706 | /* option vector 2: Open Firmware options supported */ | |
11e9ed43 | 707 | 34 - 2, /* length */ |
f709bfac PM |
708 | OV2_REAL_MODE, |
709 | 0, 0, | |
710 | W(0xffffffff), /* real_base */ | |
711 | W(0xffffffff), /* real_size */ | |
712 | W(0xffffffff), /* virt_base */ | |
713 | W(0xffffffff), /* virt_size */ | |
714 | W(0xffffffff), /* load_base */ | |
856cc2f0 | 715 | W(64), /* 64MB min RMA */ |
f709bfac PM |
716 | W(0xffffffff), /* full client load */ |
717 | 0, /* min RMA percentage of total RAM */ | |
718 | 48, /* max log_2(hash table size) */ | |
719 | ||
720 | /* option vector 3: processor options supported */ | |
11e9ed43 | 721 | 3 - 2, /* length */ |
f709bfac | 722 | 0, /* don't ignore, don't halt */ |
974a76f5 | 723 | OV3_FP | OV3_VMX | OV3_DFP, |
f709bfac PM |
724 | |
725 | /* option vector 4: IBM PAPR implementation */ | |
11e9ed43 | 726 | 2 - 2, /* length */ |
f709bfac PM |
727 | 0, /* don't halt */ |
728 | ||
729 | /* option vector 5: PAPR/OF options */ | |
28bb9ee1 | 730 | 13 - 2, /* length */ |
f709bfac | 731 | 0, /* don't ignore, don't halt */ |
d8c391a5 JM |
732 | OV5_LPAR | OV5_SPLPAR | OV5_LARGE_PAGES | OV5_DRCONF_MEMORY | |
733 | OV5_DONATE_DEDICATE_CPU | OV5_MSI, | |
8391e42a NF |
734 | 0, |
735 | OV5_CMO, | |
4b83c330 | 736 | OV5_TYPE1_AFFINITY, |
28bb9ee1 | 737 | 0, |
738 | 0, | |
739 | 0, | |
efec959f BH |
740 | /* WARNING: The offset of the "number of cores" field below |
741 | * must match by the macro below. Update the definition if | |
742 | * the structure layout changes. | |
743 | */ | |
744 | #define IBM_ARCH_VEC_NRCORES_OFFSET 100 | |
745 | W(NR_CPUS), /* number of cores supported */ | |
28bb9ee1 | 746 | |
747 | /* option vector 6: IBM PAPR hints */ | |
748 | 4 - 2, /* length */ | |
749 | 0, | |
750 | 0, | |
751 | OV6_LINUX, | |
752 | ||
f709bfac PM |
753 | }; |
754 | ||
755 | /* Old method - ELF header with PT_NOTE sections */ | |
9b6b563c PM |
756 | static struct fake_elf { |
757 | Elf32_Ehdr elfhdr; | |
758 | Elf32_Phdr phdr[2]; | |
759 | struct chrpnote { | |
760 | u32 namesz; | |
761 | u32 descsz; | |
762 | u32 type; | |
763 | char name[8]; /* "PowerPC" */ | |
764 | struct chrpdesc { | |
765 | u32 real_mode; | |
766 | u32 real_base; | |
767 | u32 real_size; | |
768 | u32 virt_base; | |
769 | u32 virt_size; | |
770 | u32 load_base; | |
771 | } chrpdesc; | |
772 | } chrpnote; | |
773 | struct rpanote { | |
774 | u32 namesz; | |
775 | u32 descsz; | |
776 | u32 type; | |
777 | char name[24]; /* "IBM,RPA-Client-Config" */ | |
778 | struct rpadesc { | |
779 | u32 lpar_affinity; | |
780 | u32 min_rmo_size; | |
781 | u32 min_rmo_percent; | |
782 | u32 max_pft_size; | |
783 | u32 splpar; | |
784 | u32 min_load; | |
785 | u32 new_mem_def; | |
786 | u32 ignore_me; | |
787 | } rpadesc; | |
788 | } rpanote; | |
5663a123 | 789 | } fake_elf = { |
9b6b563c PM |
790 | .elfhdr = { |
791 | .e_ident = { 0x7f, 'E', 'L', 'F', | |
792 | ELFCLASS32, ELFDATA2MSB, EV_CURRENT }, | |
793 | .e_type = ET_EXEC, /* yeah right */ | |
794 | .e_machine = EM_PPC, | |
795 | .e_version = EV_CURRENT, | |
796 | .e_phoff = offsetof(struct fake_elf, phdr), | |
797 | .e_phentsize = sizeof(Elf32_Phdr), | |
798 | .e_phnum = 2 | |
799 | }, | |
800 | .phdr = { | |
801 | [0] = { | |
802 | .p_type = PT_NOTE, | |
803 | .p_offset = offsetof(struct fake_elf, chrpnote), | |
804 | .p_filesz = sizeof(struct chrpnote) | |
805 | }, [1] = { | |
806 | .p_type = PT_NOTE, | |
807 | .p_offset = offsetof(struct fake_elf, rpanote), | |
808 | .p_filesz = sizeof(struct rpanote) | |
809 | } | |
810 | }, | |
811 | .chrpnote = { | |
812 | .namesz = sizeof("PowerPC"), | |
813 | .descsz = sizeof(struct chrpdesc), | |
814 | .type = 0x1275, | |
815 | .name = "PowerPC", | |
816 | .chrpdesc = { | |
817 | .real_mode = ~0U, /* ~0 means "don't care" */ | |
818 | .real_base = ~0U, | |
819 | .real_size = ~0U, | |
820 | .virt_base = ~0U, | |
821 | .virt_size = ~0U, | |
822 | .load_base = ~0U | |
823 | }, | |
824 | }, | |
825 | .rpanote = { | |
826 | .namesz = sizeof("IBM,RPA-Client-Config"), | |
827 | .descsz = sizeof(struct rpadesc), | |
828 | .type = 0x12759999, | |
829 | .name = "IBM,RPA-Client-Config", | |
830 | .rpadesc = { | |
5663a123 PM |
831 | .lpar_affinity = 0, |
832 | .min_rmo_size = 64, /* in megabytes */ | |
9b6b563c | 833 | .min_rmo_percent = 0, |
5663a123 | 834 | .max_pft_size = 48, /* 2^48 bytes max PFT size */ |
9b6b563c PM |
835 | .splpar = 1, |
836 | .min_load = ~0U, | |
5663a123 | 837 | .new_mem_def = 0 |
9b6b563c PM |
838 | } |
839 | } | |
840 | }; | |
841 | ||
efec959f BH |
842 | static int __init prom_count_smt_threads(void) |
843 | { | |
844 | phandle node; | |
845 | char type[64]; | |
846 | unsigned int plen; | |
847 | ||
848 | /* Pick up th first CPU node we can find */ | |
849 | for (node = 0; prom_next_node(&node); ) { | |
850 | type[0] = 0; | |
851 | prom_getprop(node, "device_type", type, sizeof(type)); | |
852 | ||
853 | if (strcmp(type, RELOC("cpu"))) | |
854 | continue; | |
855 | /* | |
856 | * There is an entry for each smt thread, each entry being | |
857 | * 4 bytes long. All cpus should have the same number of | |
858 | * smt threads, so return after finding the first. | |
859 | */ | |
860 | plen = prom_getproplen(node, "ibm,ppc-interrupt-server#s"); | |
861 | if (plen == PROM_ERROR) | |
862 | break; | |
863 | plen >>= 2; | |
2c48a7d6 | 864 | prom_debug("Found %lu smt threads per core\n", (unsigned long)plen); |
efec959f BH |
865 | |
866 | /* Sanity check */ | |
867 | if (plen < 1 || plen > 64) { | |
2c48a7d6 | 868 | prom_printf("Threads per core %lu out of bounds, assuming 1\n", |
efec959f BH |
869 | (unsigned long)plen); |
870 | return 1; | |
871 | } | |
872 | return plen; | |
873 | } | |
874 | prom_debug("No threads found, assuming 1 per core\n"); | |
875 | ||
876 | return 1; | |
877 | ||
878 | } | |
879 | ||
880 | ||
9b6b563c PM |
881 | static void __init prom_send_capabilities(void) |
882 | { | |
f709bfac PM |
883 | ihandle elfloader, root; |
884 | prom_arg_t ret; | |
efec959f | 885 | u32 *cores; |
f709bfac PM |
886 | |
887 | root = call_prom("open", 1, 1, ADDR("/")); | |
888 | if (root != 0) { | |
efec959f BH |
889 | /* We need to tell the FW about the number of cores we support. |
890 | * | |
891 | * To do that, we count the number of threads on the first core | |
892 | * (we assume this is the same for all cores) and use it to | |
893 | * divide NR_CPUS. | |
894 | */ | |
895 | cores = (u32 *)PTRRELOC(&ibm_architecture_vec[IBM_ARCH_VEC_NRCORES_OFFSET]); | |
896 | if (*cores != NR_CPUS) { | |
897 | prom_printf("WARNING ! " | |
2c48a7d6 | 898 | "ibm_architecture_vec structure inconsistent: %lu!\n", |
efec959f BH |
899 | *cores); |
900 | } else { | |
33ad5e4b | 901 | *cores = DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads()); |
2c48a7d6 MN |
902 | prom_printf("Max number of cores passed to firmware: %lu (NR_CPUS = %lu)\n", |
903 | *cores, NR_CPUS); | |
efec959f BH |
904 | } |
905 | ||
f709bfac | 906 | /* try calling the ibm,client-architecture-support method */ |
049d0497 | 907 | prom_printf("Calling ibm,client-architecture-support..."); |
f709bfac PM |
908 | if (call_prom_ret("call-method", 3, 2, &ret, |
909 | ADDR("ibm,client-architecture-support"), | |
33b74977 | 910 | root, |
f709bfac PM |
911 | ADDR(ibm_architecture_vec)) == 0) { |
912 | /* the call exists... */ | |
913 | if (ret) | |
4da727ae | 914 | prom_printf("\nWARNING: ibm,client-architecture" |
f709bfac PM |
915 | "-support call FAILED!\n"); |
916 | call_prom("close", 1, 0, root); | |
4da727ae | 917 | prom_printf(" done\n"); |
f709bfac PM |
918 | return; |
919 | } | |
920 | call_prom("close", 1, 0, root); | |
049d0497 | 921 | prom_printf(" not implemented\n"); |
f709bfac | 922 | } |
9b6b563c | 923 | |
f709bfac | 924 | /* no ibm,client-architecture-support call, try the old way */ |
9b6b563c PM |
925 | elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader")); |
926 | if (elfloader == 0) { | |
927 | prom_printf("couldn't open /packages/elf-loader\n"); | |
928 | return; | |
929 | } | |
930 | call_prom("call-method", 3, 1, ADDR("process-elf-header"), | |
931 | elfloader, ADDR(&fake_elf)); | |
932 | call_prom("close", 1, 0, elfloader); | |
933 | } | |
934 | #endif | |
935 | ||
936 | /* | |
937 | * Memory allocation strategy... our layout is normally: | |
938 | * | |
939 | * at 14Mb or more we have vmlinux, then a gap and initrd. In some | |
940 | * rare cases, initrd might end up being before the kernel though. | |
941 | * We assume this won't override the final kernel at 0, we have no | |
942 | * provision to handle that in this version, but it should hopefully | |
943 | * never happen. | |
944 | * | |
945 | * alloc_top is set to the top of RMO, eventually shrink down if the | |
946 | * TCEs overlap | |
947 | * | |
948 | * alloc_bottom is set to the top of kernel/initrd | |
949 | * | |
950 | * from there, allocations are done this way : rtas is allocated | |
951 | * topmost, and the device-tree is allocated from the bottom. We try | |
952 | * to grow the device-tree allocation as we progress. If we can't, | |
953 | * then we fail, we don't currently have a facility to restart | |
954 | * elsewhere, but that shouldn't be necessary. | |
955 | * | |
956 | * Note that calls to reserve_mem have to be done explicitly, memory | |
957 | * allocated with either alloc_up or alloc_down isn't automatically | |
958 | * reserved. | |
959 | */ | |
960 | ||
961 | ||
962 | /* | |
963 | * Allocates memory in the RMO upward from the kernel/initrd | |
964 | * | |
965 | * When align is 0, this is a special case, it means to allocate in place | |
966 | * at the current location of alloc_bottom or fail (that is basically | |
967 | * extending the previous allocation). Used for the device-tree flattening | |
968 | */ | |
969 | static unsigned long __init alloc_up(unsigned long size, unsigned long align) | |
970 | { | |
c4988820 | 971 | unsigned long base = RELOC(alloc_bottom); |
9b6b563c PM |
972 | unsigned long addr = 0; |
973 | ||
c4988820 PM |
974 | if (align) |
975 | base = _ALIGN_UP(base, align); | |
9b6b563c PM |
976 | prom_debug("alloc_up(%x, %x)\n", size, align); |
977 | if (RELOC(ram_top) == 0) | |
978 | prom_panic("alloc_up() called with mem not initialized\n"); | |
979 | ||
980 | if (align) | |
981 | base = _ALIGN_UP(RELOC(alloc_bottom), align); | |
982 | else | |
983 | base = RELOC(alloc_bottom); | |
984 | ||
985 | for(; (base + size) <= RELOC(alloc_top); | |
986 | base = _ALIGN_UP(base + 0x100000, align)) { | |
987 | prom_debug(" trying: 0x%x\n\r", base); | |
988 | addr = (unsigned long)prom_claim(base, size, 0); | |
c4988820 | 989 | if (addr != PROM_ERROR && addr != 0) |
9b6b563c PM |
990 | break; |
991 | addr = 0; | |
992 | if (align == 0) | |
993 | break; | |
994 | } | |
995 | if (addr == 0) | |
996 | return 0; | |
997 | RELOC(alloc_bottom) = addr; | |
998 | ||
999 | prom_debug(" -> %x\n", addr); | |
1000 | prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom)); | |
1001 | prom_debug(" alloc_top : %x\n", RELOC(alloc_top)); | |
1002 | prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); | |
1003 | prom_debug(" rmo_top : %x\n", RELOC(rmo_top)); | |
1004 | prom_debug(" ram_top : %x\n", RELOC(ram_top)); | |
1005 | ||
1006 | return addr; | |
1007 | } | |
1008 | ||
1009 | /* | |
1010 | * Allocates memory downward, either from top of RMO, or if highmem | |
1011 | * is set, from the top of RAM. Note that this one doesn't handle | |
1012 | * failures. It does claim memory if highmem is not set. | |
1013 | */ | |
1014 | static unsigned long __init alloc_down(unsigned long size, unsigned long align, | |
1015 | int highmem) | |
1016 | { | |
1017 | unsigned long base, addr = 0; | |
1018 | ||
1019 | prom_debug("alloc_down(%x, %x, %s)\n", size, align, | |
1020 | highmem ? RELOC("(high)") : RELOC("(low)")); | |
1021 | if (RELOC(ram_top) == 0) | |
1022 | prom_panic("alloc_down() called with mem not initialized\n"); | |
1023 | ||
1024 | if (highmem) { | |
1025 | /* Carve out storage for the TCE table. */ | |
1026 | addr = _ALIGN_DOWN(RELOC(alloc_top_high) - size, align); | |
1027 | if (addr <= RELOC(alloc_bottom)) | |
1028 | return 0; | |
1029 | /* Will we bump into the RMO ? If yes, check out that we | |
1030 | * didn't overlap existing allocations there, if we did, | |
1031 | * we are dead, we must be the first in town ! | |
1032 | */ | |
1033 | if (addr < RELOC(rmo_top)) { | |
1034 | /* Good, we are first */ | |
1035 | if (RELOC(alloc_top) == RELOC(rmo_top)) | |
1036 | RELOC(alloc_top) = RELOC(rmo_top) = addr; | |
1037 | else | |
1038 | return 0; | |
1039 | } | |
1040 | RELOC(alloc_top_high) = addr; | |
1041 | goto bail; | |
1042 | } | |
1043 | ||
1044 | base = _ALIGN_DOWN(RELOC(alloc_top) - size, align); | |
1045 | for (; base > RELOC(alloc_bottom); | |
1046 | base = _ALIGN_DOWN(base - 0x100000, align)) { | |
1047 | prom_debug(" trying: 0x%x\n\r", base); | |
1048 | addr = (unsigned long)prom_claim(base, size, 0); | |
c4988820 | 1049 | if (addr != PROM_ERROR && addr != 0) |
9b6b563c PM |
1050 | break; |
1051 | addr = 0; | |
1052 | } | |
1053 | if (addr == 0) | |
1054 | return 0; | |
1055 | RELOC(alloc_top) = addr; | |
1056 | ||
1057 | bail: | |
1058 | prom_debug(" -> %x\n", addr); | |
1059 | prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom)); | |
1060 | prom_debug(" alloc_top : %x\n", RELOC(alloc_top)); | |
1061 | prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); | |
1062 | prom_debug(" rmo_top : %x\n", RELOC(rmo_top)); | |
1063 | prom_debug(" ram_top : %x\n", RELOC(ram_top)); | |
1064 | ||
1065 | return addr; | |
1066 | } | |
1067 | ||
1068 | /* | |
1069 | * Parse a "reg" cell | |
1070 | */ | |
1071 | static unsigned long __init prom_next_cell(int s, cell_t **cellp) | |
1072 | { | |
1073 | cell_t *p = *cellp; | |
1074 | unsigned long r = 0; | |
1075 | ||
1076 | /* Ignore more than 2 cells */ | |
1077 | while (s > sizeof(unsigned long) / 4) { | |
1078 | p++; | |
1079 | s--; | |
1080 | } | |
1081 | r = *p++; | |
1082 | #ifdef CONFIG_PPC64 | |
35499c01 | 1083 | if (s > 1) { |
9b6b563c PM |
1084 | r <<= 32; |
1085 | r |= *(p++); | |
1086 | } | |
1087 | #endif | |
1088 | *cellp = p; | |
1089 | return r; | |
1090 | } | |
1091 | ||
1092 | /* | |
1093 | * Very dumb function for adding to the memory reserve list, but | |
1094 | * we don't need anything smarter at this point | |
1095 | * | |
1096 | * XXX Eventually check for collisions. They should NEVER happen. | |
1097 | * If problems seem to show up, it would be a good start to track | |
1098 | * them down. | |
1099 | */ | |
0108d3fe | 1100 | static void __init reserve_mem(u64 base, u64 size) |
9b6b563c | 1101 | { |
cbbcf340 | 1102 | u64 top = base + size; |
9b6b563c PM |
1103 | unsigned long cnt = RELOC(mem_reserve_cnt); |
1104 | ||
1105 | if (size == 0) | |
1106 | return; | |
1107 | ||
1108 | /* We need to always keep one empty entry so that we | |
1109 | * have our terminator with "size" set to 0 since we are | |
1110 | * dumb and just copy this entire array to the boot params | |
1111 | */ | |
1112 | base = _ALIGN_DOWN(base, PAGE_SIZE); | |
1113 | top = _ALIGN_UP(top, PAGE_SIZE); | |
1114 | size = top - base; | |
1115 | ||
1116 | if (cnt >= (MEM_RESERVE_MAP_SIZE - 1)) | |
1117 | prom_panic("Memory reserve map exhausted !\n"); | |
1118 | RELOC(mem_reserve_map)[cnt].base = base; | |
1119 | RELOC(mem_reserve_map)[cnt].size = size; | |
1120 | RELOC(mem_reserve_cnt) = cnt + 1; | |
1121 | } | |
1122 | ||
1123 | /* | |
b3c2ffd5 | 1124 | * Initialize memory allocation mechanism, parse "memory" nodes and |
9b6b563c PM |
1125 | * obtain that way the top of memory and RMO to setup out local allocator |
1126 | */ | |
1127 | static void __init prom_init_mem(void) | |
1128 | { | |
1129 | phandle node; | |
1130 | char *path, type[64]; | |
1131 | unsigned int plen; | |
1132 | cell_t *p, *endp; | |
1133 | struct prom_t *_prom = &RELOC(prom); | |
1134 | u32 rac, rsc; | |
1135 | ||
1136 | /* | |
1137 | * We iterate the memory nodes to find | |
1138 | * 1) top of RMO (first node) | |
1139 | * 2) top of memory | |
1140 | */ | |
1141 | rac = 2; | |
1142 | prom_getprop(_prom->root, "#address-cells", &rac, sizeof(rac)); | |
1143 | rsc = 1; | |
1144 | prom_getprop(_prom->root, "#size-cells", &rsc, sizeof(rsc)); | |
1145 | prom_debug("root_addr_cells: %x\n", (unsigned long) rac); | |
1146 | prom_debug("root_size_cells: %x\n", (unsigned long) rsc); | |
1147 | ||
1148 | prom_debug("scanning memory:\n"); | |
1149 | path = RELOC(prom_scratch); | |
1150 | ||
1151 | for (node = 0; prom_next_node(&node); ) { | |
1152 | type[0] = 0; | |
1153 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1154 | ||
c4988820 PM |
1155 | if (type[0] == 0) { |
1156 | /* | |
1157 | * CHRP Longtrail machines have no device_type | |
1158 | * on the memory node, so check the name instead... | |
1159 | */ | |
1160 | prom_getprop(node, "name", type, sizeof(type)); | |
1161 | } | |
9b6b563c PM |
1162 | if (strcmp(type, RELOC("memory"))) |
1163 | continue; | |
c4988820 | 1164 | |
9b6b563c PM |
1165 | plen = prom_getprop(node, "reg", RELOC(regbuf), sizeof(regbuf)); |
1166 | if (plen > sizeof(regbuf)) { | |
1167 | prom_printf("memory node too large for buffer !\n"); | |
1168 | plen = sizeof(regbuf); | |
1169 | } | |
1170 | p = RELOC(regbuf); | |
1171 | endp = p + (plen / sizeof(cell_t)); | |
1172 | ||
1173 | #ifdef DEBUG_PROM | |
1174 | memset(path, 0, PROM_SCRATCH_SIZE); | |
1175 | call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); | |
1176 | prom_debug(" node %s :\n", path); | |
1177 | #endif /* DEBUG_PROM */ | |
1178 | ||
1179 | while ((endp - p) >= (rac + rsc)) { | |
1180 | unsigned long base, size; | |
1181 | ||
1182 | base = prom_next_cell(rac, &p); | |
1183 | size = prom_next_cell(rsc, &p); | |
1184 | ||
1185 | if (size == 0) | |
1186 | continue; | |
1187 | prom_debug(" %x %x\n", base, size); | |
ab1b55e2 | 1188 | if (base == 0 && (RELOC(of_platform) & PLATFORM_LPAR)) |
9b6b563c PM |
1189 | RELOC(rmo_top) = size; |
1190 | if ((base + size) > RELOC(ram_top)) | |
1191 | RELOC(ram_top) = base + size; | |
1192 | } | |
1193 | } | |
1194 | ||
1195 | RELOC(alloc_bottom) = PAGE_ALIGN((unsigned long)&RELOC(_end) + 0x4000); | |
1196 | ||
1197 | /* Check if we have an initrd after the kernel, if we do move our bottom | |
1198 | * point to after it | |
1199 | */ | |
1200 | if (RELOC(prom_initrd_start)) { | |
1201 | if (RELOC(prom_initrd_end) > RELOC(alloc_bottom)) | |
1202 | RELOC(alloc_bottom) = PAGE_ALIGN(RELOC(prom_initrd_end)); | |
1203 | } | |
1204 | ||
cf68787b BK |
1205 | /* |
1206 | * If prom_memory_limit is set we reduce the upper limits *except* for | |
1207 | * alloc_top_high. This must be the real top of RAM so we can put | |
1208 | * TCE's up there. | |
1209 | */ | |
1210 | ||
1211 | RELOC(alloc_top_high) = RELOC(ram_top); | |
1212 | ||
1213 | if (RELOC(prom_memory_limit)) { | |
1214 | if (RELOC(prom_memory_limit) <= RELOC(alloc_bottom)) { | |
1215 | prom_printf("Ignoring mem=%x <= alloc_bottom.\n", | |
1216 | RELOC(prom_memory_limit)); | |
1217 | RELOC(prom_memory_limit) = 0; | |
1218 | } else if (RELOC(prom_memory_limit) >= RELOC(ram_top)) { | |
1219 | prom_printf("Ignoring mem=%x >= ram_top.\n", | |
1220 | RELOC(prom_memory_limit)); | |
1221 | RELOC(prom_memory_limit) = 0; | |
1222 | } else { | |
1223 | RELOC(ram_top) = RELOC(prom_memory_limit); | |
1224 | RELOC(rmo_top) = min(RELOC(rmo_top), RELOC(prom_memory_limit)); | |
1225 | } | |
1226 | } | |
1227 | ||
9b6b563c PM |
1228 | /* |
1229 | * Setup our top alloc point, that is top of RMO or top of | |
1230 | * segment 0 when running non-LPAR. | |
1231 | * Some RS64 machines have buggy firmware where claims up at | |
1232 | * 1GB fail. Cap at 768MB as a workaround. | |
1233 | * Since 768MB is plenty of room, and we need to cap to something | |
1234 | * reasonable on 32-bit, cap at 768MB on all machines. | |
1235 | */ | |
1236 | if (!RELOC(rmo_top)) | |
1237 | RELOC(rmo_top) = RELOC(ram_top); | |
1238 | RELOC(rmo_top) = min(0x30000000ul, RELOC(rmo_top)); | |
1239 | RELOC(alloc_top) = RELOC(rmo_top); | |
2babf5c2 | 1240 | RELOC(alloc_top_high) = RELOC(ram_top); |
9b6b563c PM |
1241 | |
1242 | prom_printf("memory layout at init:\n"); | |
cf68787b | 1243 | prom_printf(" memory_limit : %x (16 MB aligned)\n", RELOC(prom_memory_limit)); |
9b6b563c PM |
1244 | prom_printf(" alloc_bottom : %x\n", RELOC(alloc_bottom)); |
1245 | prom_printf(" alloc_top : %x\n", RELOC(alloc_top)); | |
1246 | prom_printf(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); | |
1247 | prom_printf(" rmo_top : %x\n", RELOC(rmo_top)); | |
1248 | prom_printf(" ram_top : %x\n", RELOC(ram_top)); | |
1249 | } | |
1250 | ||
1251 | ||
1252 | /* | |
1253 | * Allocate room for and instantiate RTAS | |
1254 | */ | |
1255 | static void __init prom_instantiate_rtas(void) | |
1256 | { | |
1257 | phandle rtas_node; | |
1258 | ihandle rtas_inst; | |
1259 | u32 base, entry = 0; | |
1260 | u32 size = 0; | |
1261 | ||
1262 | prom_debug("prom_instantiate_rtas: start...\n"); | |
1263 | ||
1264 | rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas")); | |
1265 | prom_debug("rtas_node: %x\n", rtas_node); | |
1266 | if (!PHANDLE_VALID(rtas_node)) | |
1267 | return; | |
1268 | ||
1269 | prom_getprop(rtas_node, "rtas-size", &size, sizeof(size)); | |
1270 | if (size == 0) | |
1271 | return; | |
1272 | ||
1273 | base = alloc_down(size, PAGE_SIZE, 0); | |
1274 | if (base == 0) { | |
1275 | prom_printf("RTAS allocation failed !\n"); | |
1276 | return; | |
1277 | } | |
1278 | ||
1279 | rtas_inst = call_prom("open", 1, 1, ADDR("/rtas")); | |
1280 | if (!IHANDLE_VALID(rtas_inst)) { | |
a23414be | 1281 | prom_printf("opening rtas package failed (%x)\n", rtas_inst); |
9b6b563c PM |
1282 | return; |
1283 | } | |
1284 | ||
1f8737aa | 1285 | prom_printf("instantiating rtas at 0x%x...", base); |
9b6b563c PM |
1286 | |
1287 | if (call_prom_ret("call-method", 3, 2, &entry, | |
1288 | ADDR("instantiate-rtas"), | |
a23414be | 1289 | rtas_inst, base) != 0 |
9b6b563c PM |
1290 | || entry == 0) { |
1291 | prom_printf(" failed\n"); | |
1292 | return; | |
1293 | } | |
1294 | prom_printf(" done\n"); | |
1295 | ||
1296 | reserve_mem(base, size); | |
1297 | ||
a23414be PM |
1298 | prom_setprop(rtas_node, "/rtas", "linux,rtas-base", |
1299 | &base, sizeof(base)); | |
1300 | prom_setprop(rtas_node, "/rtas", "linux,rtas-entry", | |
1301 | &entry, sizeof(entry)); | |
9b6b563c PM |
1302 | |
1303 | prom_debug("rtas base = 0x%x\n", base); | |
1304 | prom_debug("rtas entry = 0x%x\n", entry); | |
1305 | prom_debug("rtas size = 0x%x\n", (long)size); | |
1306 | ||
1307 | prom_debug("prom_instantiate_rtas: end...\n"); | |
1308 | } | |
1309 | ||
1310 | #ifdef CONFIG_PPC64 | |
1311 | /* | |
1312 | * Allocate room for and initialize TCE tables | |
1313 | */ | |
1314 | static void __init prom_initialize_tce_table(void) | |
1315 | { | |
1316 | phandle node; | |
1317 | ihandle phb_node; | |
1318 | char compatible[64], type[64], model[64]; | |
1319 | char *path = RELOC(prom_scratch); | |
1320 | u64 base, align; | |
1321 | u32 minalign, minsize; | |
1322 | u64 tce_entry, *tce_entryp; | |
1323 | u64 local_alloc_top, local_alloc_bottom; | |
1324 | u64 i; | |
1325 | ||
165785e5 | 1326 | if (RELOC(prom_iommu_off)) |
9b6b563c PM |
1327 | return; |
1328 | ||
1329 | prom_debug("starting prom_initialize_tce_table\n"); | |
1330 | ||
1331 | /* Cache current top of allocs so we reserve a single block */ | |
1332 | local_alloc_top = RELOC(alloc_top_high); | |
1333 | local_alloc_bottom = local_alloc_top; | |
1334 | ||
1335 | /* Search all nodes looking for PHBs. */ | |
1336 | for (node = 0; prom_next_node(&node); ) { | |
1337 | compatible[0] = 0; | |
1338 | type[0] = 0; | |
1339 | model[0] = 0; | |
1340 | prom_getprop(node, "compatible", | |
1341 | compatible, sizeof(compatible)); | |
1342 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1343 | prom_getprop(node, "model", model, sizeof(model)); | |
1344 | ||
1345 | if ((type[0] == 0) || (strstr(type, RELOC("pci")) == NULL)) | |
1346 | continue; | |
1347 | ||
e788ff13 | 1348 | /* Keep the old logic intact to avoid regression. */ |
9b6b563c PM |
1349 | if (compatible[0] != 0) { |
1350 | if ((strstr(compatible, RELOC("python")) == NULL) && | |
1351 | (strstr(compatible, RELOC("Speedwagon")) == NULL) && | |
1352 | (strstr(compatible, RELOC("Winnipeg")) == NULL)) | |
1353 | continue; | |
1354 | } else if (model[0] != 0) { | |
1355 | if ((strstr(model, RELOC("ython")) == NULL) && | |
1356 | (strstr(model, RELOC("peedwagon")) == NULL) && | |
1357 | (strstr(model, RELOC("innipeg")) == NULL)) | |
1358 | continue; | |
1359 | } | |
1360 | ||
1361 | if (prom_getprop(node, "tce-table-minalign", &minalign, | |
1362 | sizeof(minalign)) == PROM_ERROR) | |
1363 | minalign = 0; | |
1364 | if (prom_getprop(node, "tce-table-minsize", &minsize, | |
1365 | sizeof(minsize)) == PROM_ERROR) | |
1366 | minsize = 4UL << 20; | |
1367 | ||
1368 | /* | |
1369 | * Even though we read what OF wants, we just set the table | |
1370 | * size to 4 MB. This is enough to map 2GB of PCI DMA space. | |
1371 | * By doing this, we avoid the pitfalls of trying to DMA to | |
1372 | * MMIO space and the DMA alias hole. | |
1373 | * | |
1374 | * On POWER4, firmware sets the TCE region by assuming | |
1375 | * each TCE table is 8MB. Using this memory for anything | |
1376 | * else will impact performance, so we always allocate 8MB. | |
1377 | * Anton | |
1378 | */ | |
1379 | if (__is_processor(PV_POWER4) || __is_processor(PV_POWER4p)) | |
1380 | minsize = 8UL << 20; | |
1381 | else | |
1382 | minsize = 4UL << 20; | |
1383 | ||
1384 | /* Align to the greater of the align or size */ | |
1385 | align = max(minalign, minsize); | |
1386 | base = alloc_down(minsize, align, 1); | |
1387 | if (base == 0) | |
1388 | prom_panic("ERROR, cannot find space for TCE table.\n"); | |
1389 | if (base < local_alloc_bottom) | |
1390 | local_alloc_bottom = base; | |
1391 | ||
9b6b563c | 1392 | /* It seems OF doesn't null-terminate the path :-( */ |
aca71ef8 | 1393 | memset(path, 0, PROM_SCRATCH_SIZE); |
9b6b563c PM |
1394 | /* Call OF to setup the TCE hardware */ |
1395 | if (call_prom("package-to-path", 3, 1, node, | |
1396 | path, PROM_SCRATCH_SIZE-1) == PROM_ERROR) { | |
1397 | prom_printf("package-to-path failed\n"); | |
1398 | } | |
1399 | ||
a23414be PM |
1400 | /* Save away the TCE table attributes for later use. */ |
1401 | prom_setprop(node, path, "linux,tce-base", &base, sizeof(base)); | |
1402 | prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize)); | |
1403 | ||
9b6b563c PM |
1404 | prom_debug("TCE table: %s\n", path); |
1405 | prom_debug("\tnode = 0x%x\n", node); | |
1406 | prom_debug("\tbase = 0x%x\n", base); | |
1407 | prom_debug("\tsize = 0x%x\n", minsize); | |
1408 | ||
1409 | /* Initialize the table to have a one-to-one mapping | |
1410 | * over the allocated size. | |
1411 | */ | |
2b931fb6 | 1412 | tce_entryp = (u64 *)base; |
9b6b563c PM |
1413 | for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) { |
1414 | tce_entry = (i << PAGE_SHIFT); | |
1415 | tce_entry |= 0x3; | |
1416 | *tce_entryp = tce_entry; | |
1417 | } | |
1418 | ||
1419 | prom_printf("opening PHB %s", path); | |
1420 | phb_node = call_prom("open", 1, 1, path); | |
1421 | if (phb_node == 0) | |
1422 | prom_printf("... failed\n"); | |
1423 | else | |
1424 | prom_printf("... done\n"); | |
1425 | ||
1426 | call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"), | |
1427 | phb_node, -1, minsize, | |
1428 | (u32) base, (u32) (base >> 32)); | |
1429 | call_prom("close", 1, 0, phb_node); | |
1430 | } | |
1431 | ||
1432 | reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom); | |
1433 | ||
2babf5c2 ME |
1434 | /* These are only really needed if there is a memory limit in |
1435 | * effect, but we don't know so export them always. */ | |
1436 | RELOC(prom_tce_alloc_start) = local_alloc_bottom; | |
1437 | RELOC(prom_tce_alloc_end) = local_alloc_top; | |
9b6b563c PM |
1438 | |
1439 | /* Flag the first invalid entry */ | |
1440 | prom_debug("ending prom_initialize_tce_table\n"); | |
1441 | } | |
1442 | #endif | |
1443 | ||
1444 | /* | |
1445 | * With CHRP SMP we need to use the OF to start the other processors. | |
1446 | * We can't wait until smp_boot_cpus (the OF is trashed by then) | |
1447 | * so we have to put the processors into a holding pattern controlled | |
1448 | * by the kernel (not OF) before we destroy the OF. | |
1449 | * | |
1450 | * This uses a chunk of low memory, puts some holding pattern | |
1451 | * code there and sends the other processors off to there until | |
1452 | * smp_boot_cpus tells them to do something. The holding pattern | |
1453 | * checks that address until its cpu # is there, when it is that | |
1454 | * cpu jumps to __secondary_start(). smp_boot_cpus() takes care | |
1455 | * of setting those values. | |
1456 | * | |
1457 | * We also use physical address 0x4 here to tell when a cpu | |
1458 | * is in its holding pattern code. | |
1459 | * | |
1460 | * -- Cort | |
1461 | */ | |
bbd0abda PM |
1462 | /* |
1463 | * We want to reference the copy of __secondary_hold_* in the | |
1464 | * 0 - 0x100 address range | |
1465 | */ | |
1466 | #define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff) | |
1467 | ||
9b6b563c PM |
1468 | static void __init prom_hold_cpus(void) |
1469 | { | |
9b6b563c PM |
1470 | unsigned long i; |
1471 | unsigned int reg; | |
1472 | phandle node; | |
1473 | char type[64]; | |
bbd0abda | 1474 | struct prom_t *_prom = &RELOC(prom); |
9b6b563c | 1475 | unsigned long *spinloop |
bbd0abda | 1476 | = (void *) LOW_ADDR(__secondary_hold_spinloop); |
9b6b563c | 1477 | unsigned long *acknowledge |
bbd0abda | 1478 | = (void *) LOW_ADDR(__secondary_hold_acknowledge); |
bbd0abda | 1479 | unsigned long secondary_hold = LOW_ADDR(__secondary_hold); |
9b6b563c PM |
1480 | |
1481 | prom_debug("prom_hold_cpus: start...\n"); | |
1482 | prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop); | |
1483 | prom_debug(" 1) *spinloop = 0x%x\n", *spinloop); | |
1484 | prom_debug(" 1) acknowledge = 0x%x\n", | |
1485 | (unsigned long)acknowledge); | |
1486 | prom_debug(" 1) *acknowledge = 0x%x\n", *acknowledge); | |
1487 | prom_debug(" 1) secondary_hold = 0x%x\n", secondary_hold); | |
1488 | ||
1489 | /* Set the common spinloop variable, so all of the secondary cpus | |
1490 | * will block when they are awakened from their OF spinloop. | |
1491 | * This must occur for both SMP and non SMP kernels, since OF will | |
1492 | * be trashed when we move the kernel. | |
1493 | */ | |
1494 | *spinloop = 0; | |
1495 | ||
9b6b563c PM |
1496 | /* look for cpus */ |
1497 | for (node = 0; prom_next_node(&node); ) { | |
1498 | type[0] = 0; | |
1499 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1500 | if (strcmp(type, RELOC("cpu")) != 0) | |
1501 | continue; | |
1502 | ||
1503 | /* Skip non-configured cpus. */ | |
1504 | if (prom_getprop(node, "status", type, sizeof(type)) > 0) | |
1505 | if (strcmp(type, RELOC("okay")) != 0) | |
1506 | continue; | |
1507 | ||
1508 | reg = -1; | |
1509 | prom_getprop(node, "reg", ®, sizeof(reg)); | |
1510 | ||
2c48a7d6 | 1511 | prom_debug("cpu hw idx = %lu\n", reg); |
9b6b563c PM |
1512 | |
1513 | /* Init the acknowledge var which will be reset by | |
1514 | * the secondary cpu when it awakens from its OF | |
1515 | * spinloop. | |
1516 | */ | |
1517 | *acknowledge = (unsigned long)-1; | |
1518 | ||
7d2f6075 | 1519 | if (reg != _prom->cpu) { |
9b6b563c | 1520 | /* Primary Thread of non-boot cpu */ |
2c48a7d6 | 1521 | prom_printf("starting cpu hw idx %lu... ", reg); |
9b6b563c PM |
1522 | call_prom("start-cpu", 3, 0, node, |
1523 | secondary_hold, reg); | |
1524 | ||
bbd0abda PM |
1525 | for (i = 0; (i < 100000000) && |
1526 | (*acknowledge == ((unsigned long)-1)); i++ ) | |
9b6b563c PM |
1527 | mb(); |
1528 | ||
bbd0abda | 1529 | if (*acknowledge == reg) |
9b6b563c | 1530 | prom_printf("done\n"); |
bbd0abda | 1531 | else |
9b6b563c | 1532 | prom_printf("failed: %x\n", *acknowledge); |
9b6b563c PM |
1533 | } |
1534 | #ifdef CONFIG_SMP | |
1535 | else | |
2c48a7d6 | 1536 | prom_printf("boot cpu hw idx %lu\n", reg); |
9b6b563c | 1537 | #endif /* CONFIG_SMP */ |
9b6b563c | 1538 | } |
9b6b563c | 1539 | |
9b6b563c | 1540 | prom_debug("prom_hold_cpus: end...\n"); |
9b6b563c PM |
1541 | } |
1542 | ||
1543 | ||
1544 | static void __init prom_init_client_services(unsigned long pp) | |
1545 | { | |
1546 | struct prom_t *_prom = &RELOC(prom); | |
1547 | ||
1548 | /* Get a handle to the prom entry point before anything else */ | |
1549 | RELOC(prom_entry) = pp; | |
1550 | ||
1551 | /* get a handle for the stdout device */ | |
1552 | _prom->chosen = call_prom("finddevice", 1, 1, ADDR("/chosen")); | |
1553 | if (!PHANDLE_VALID(_prom->chosen)) | |
1554 | prom_panic("cannot find chosen"); /* msg won't be printed :( */ | |
1555 | ||
1556 | /* get device tree root */ | |
1557 | _prom->root = call_prom("finddevice", 1, 1, ADDR("/")); | |
1558 | if (!PHANDLE_VALID(_prom->root)) | |
1559 | prom_panic("cannot find device tree root"); /* msg won't be printed :( */ | |
a575b807 PM |
1560 | |
1561 | _prom->mmumap = 0; | |
1562 | } | |
1563 | ||
1564 | #ifdef CONFIG_PPC32 | |
1565 | /* | |
1566 | * For really old powermacs, we need to map things we claim. | |
1567 | * For that, we need the ihandle of the mmu. | |
a23414be | 1568 | * Also, on the longtrail, we need to work around other bugs. |
a575b807 PM |
1569 | */ |
1570 | static void __init prom_find_mmu(void) | |
1571 | { | |
1572 | struct prom_t *_prom = &RELOC(prom); | |
1573 | phandle oprom; | |
1574 | char version[64]; | |
1575 | ||
1576 | oprom = call_prom("finddevice", 1, 1, ADDR("/openprom")); | |
1577 | if (!PHANDLE_VALID(oprom)) | |
1578 | return; | |
1579 | if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0) | |
1580 | return; | |
1581 | version[sizeof(version) - 1] = 0; | |
a575b807 | 1582 | /* XXX might need to add other versions here */ |
a23414be PM |
1583 | if (strcmp(version, "Open Firmware, 1.0.5") == 0) |
1584 | of_workarounds = OF_WA_CLAIM; | |
1585 | else if (strncmp(version, "FirmWorks,3.", 12) == 0) { | |
1586 | of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL; | |
1587 | call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim"); | |
1588 | } else | |
a575b807 | 1589 | return; |
a23414be | 1590 | _prom->memory = call_prom("open", 1, 1, ADDR("/memory")); |
a575b807 PM |
1591 | prom_getprop(_prom->chosen, "mmu", &_prom->mmumap, |
1592 | sizeof(_prom->mmumap)); | |
a23414be PM |
1593 | if (!IHANDLE_VALID(_prom->memory) || !IHANDLE_VALID(_prom->mmumap)) |
1594 | of_workarounds &= ~OF_WA_CLAIM; /* hmmm */ | |
9b6b563c | 1595 | } |
a575b807 PM |
1596 | #else |
1597 | #define prom_find_mmu() | |
1598 | #endif | |
9b6b563c PM |
1599 | |
1600 | static void __init prom_init_stdout(void) | |
1601 | { | |
1602 | struct prom_t *_prom = &RELOC(prom); | |
1603 | char *path = RELOC(of_stdout_device); | |
1604 | char type[16]; | |
1605 | u32 val; | |
1606 | ||
1607 | if (prom_getprop(_prom->chosen, "stdout", &val, sizeof(val)) <= 0) | |
1608 | prom_panic("cannot find stdout"); | |
1609 | ||
1610 | _prom->stdout = val; | |
1611 | ||
1612 | /* Get the full OF pathname of the stdout device */ | |
1613 | memset(path, 0, 256); | |
1614 | call_prom("instance-to-path", 3, 1, _prom->stdout, path, 255); | |
1615 | val = call_prom("instance-to-package", 1, 1, _prom->stdout); | |
a23414be PM |
1616 | prom_setprop(_prom->chosen, "/chosen", "linux,stdout-package", |
1617 | &val, sizeof(val)); | |
9b6b563c | 1618 | prom_printf("OF stdout device is: %s\n", RELOC(of_stdout_device)); |
a23414be PM |
1619 | prom_setprop(_prom->chosen, "/chosen", "linux,stdout-path", |
1620 | path, strlen(path) + 1); | |
9b6b563c PM |
1621 | |
1622 | /* If it's a display, note it */ | |
1623 | memset(type, 0, sizeof(type)); | |
1624 | prom_getprop(val, "device_type", type, sizeof(type)); | |
1625 | if (strcmp(type, RELOC("display")) == 0) | |
a23414be | 1626 | prom_setprop(val, path, "linux,boot-display", NULL, 0); |
9b6b563c PM |
1627 | } |
1628 | ||
1629 | static void __init prom_close_stdin(void) | |
1630 | { | |
1631 | struct prom_t *_prom = &RELOC(prom); | |
1632 | ihandle val; | |
1633 | ||
1634 | if (prom_getprop(_prom->chosen, "stdin", &val, sizeof(val)) > 0) | |
1635 | call_prom("close", 1, 0, val); | |
1636 | } | |
1637 | ||
1638 | static int __init prom_find_machine_type(void) | |
1639 | { | |
1640 | struct prom_t *_prom = &RELOC(prom); | |
1641 | char compat[256]; | |
1642 | int len, i = 0; | |
21fe3301 | 1643 | #ifdef CONFIG_PPC64 |
9b6b563c | 1644 | phandle rtas; |
e8222502 | 1645 | int x; |
21fe3301 | 1646 | #endif |
e8222502 BH |
1647 | |
1648 | /* Look for a PowerMac */ | |
9b6b563c PM |
1649 | len = prom_getprop(_prom->root, "compatible", |
1650 | compat, sizeof(compat)-1); | |
1651 | if (len > 0) { | |
1652 | compat[len] = 0; | |
1653 | while (i < len) { | |
1654 | char *p = &compat[i]; | |
1655 | int sl = strlen(p); | |
1656 | if (sl == 0) | |
1657 | break; | |
1658 | if (strstr(p, RELOC("Power Macintosh")) || | |
a575b807 | 1659 | strstr(p, RELOC("MacRISC"))) |
9b6b563c | 1660 | return PLATFORM_POWERMAC; |
133dda1e AB |
1661 | #ifdef CONFIG_PPC64 |
1662 | /* We must make sure we don't detect the IBM Cell | |
1663 | * blades as pSeries due to some firmware issues, | |
1664 | * so we do it here. | |
1665 | */ | |
1666 | if (strstr(p, RELOC("IBM,CBEA")) || | |
1667 | strstr(p, RELOC("IBM,CPBW-1.0"))) | |
1668 | return PLATFORM_GENERIC; | |
1669 | #endif /* CONFIG_PPC64 */ | |
9b6b563c PM |
1670 | i += sl + 1; |
1671 | } | |
1672 | } | |
1673 | #ifdef CONFIG_PPC64 | |
e8222502 BH |
1674 | /* If not a mac, try to figure out if it's an IBM pSeries or any other |
1675 | * PAPR compliant platform. We assume it is if : | |
1676 | * - /device_type is "chrp" (please, do NOT use that for future | |
1677 | * non-IBM designs ! | |
1678 | * - it has /rtas | |
1679 | */ | |
6f806cee | 1680 | len = prom_getprop(_prom->root, "device_type", |
e8222502 BH |
1681 | compat, sizeof(compat)-1); |
1682 | if (len <= 0) | |
1683 | return PLATFORM_GENERIC; | |
cb6b2eb9 | 1684 | if (strcmp(compat, RELOC("chrp"))) |
e8222502 BH |
1685 | return PLATFORM_GENERIC; |
1686 | ||
9b6b563c PM |
1687 | /* Default to pSeries. We need to know if we are running LPAR */ |
1688 | rtas = call_prom("finddevice", 1, 1, ADDR("/rtas")); | |
e8222502 BH |
1689 | if (!PHANDLE_VALID(rtas)) |
1690 | return PLATFORM_GENERIC; | |
1691 | x = prom_getproplen(rtas, "ibm,hypertas-functions"); | |
1692 | if (x != PROM_ERROR) { | |
4da727ae | 1693 | prom_debug("Hypertas detected, assuming LPAR !\n"); |
e8222502 | 1694 | return PLATFORM_PSERIES_LPAR; |
9b6b563c PM |
1695 | } |
1696 | return PLATFORM_PSERIES; | |
1697 | #else | |
e8222502 | 1698 | return PLATFORM_GENERIC; |
9b6b563c PM |
1699 | #endif |
1700 | } | |
1701 | ||
9b6b563c PM |
1702 | static int __init prom_set_color(ihandle ih, int i, int r, int g, int b) |
1703 | { | |
1704 | return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r); | |
1705 | } | |
1706 | ||
1707 | /* | |
1708 | * If we have a display that we don't know how to drive, | |
1709 | * we will want to try to execute OF's open method for it | |
1710 | * later. However, OF will probably fall over if we do that | |
1711 | * we've taken over the MMU. | |
1712 | * So we check whether we will need to open the display, | |
1713 | * and if so, open it now. | |
1714 | */ | |
1715 | static void __init prom_check_displays(void) | |
1716 | { | |
1717 | char type[16], *path; | |
1718 | phandle node; | |
1719 | ihandle ih; | |
1720 | int i; | |
9b6b563c PM |
1721 | |
1722 | static unsigned char default_colors[] = { | |
1723 | 0x00, 0x00, 0x00, | |
1724 | 0x00, 0x00, 0xaa, | |
1725 | 0x00, 0xaa, 0x00, | |
1726 | 0x00, 0xaa, 0xaa, | |
1727 | 0xaa, 0x00, 0x00, | |
1728 | 0xaa, 0x00, 0xaa, | |
1729 | 0xaa, 0xaa, 0x00, | |
1730 | 0xaa, 0xaa, 0xaa, | |
1731 | 0x55, 0x55, 0x55, | |
1732 | 0x55, 0x55, 0xff, | |
1733 | 0x55, 0xff, 0x55, | |
1734 | 0x55, 0xff, 0xff, | |
1735 | 0xff, 0x55, 0x55, | |
1736 | 0xff, 0x55, 0xff, | |
1737 | 0xff, 0xff, 0x55, | |
1738 | 0xff, 0xff, 0xff | |
1739 | }; | |
1740 | const unsigned char *clut; | |
1741 | ||
4da727ae | 1742 | prom_debug("Looking for displays\n"); |
9b6b563c PM |
1743 | for (node = 0; prom_next_node(&node); ) { |
1744 | memset(type, 0, sizeof(type)); | |
1745 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1746 | if (strcmp(type, RELOC("display")) != 0) | |
1747 | continue; | |
1748 | ||
1749 | /* It seems OF doesn't null-terminate the path :-( */ | |
1750 | path = RELOC(prom_scratch); | |
1751 | memset(path, 0, PROM_SCRATCH_SIZE); | |
1752 | ||
1753 | /* | |
1754 | * leave some room at the end of the path for appending extra | |
1755 | * arguments | |
1756 | */ | |
1757 | if (call_prom("package-to-path", 3, 1, node, path, | |
1758 | PROM_SCRATCH_SIZE-10) == PROM_ERROR) | |
1759 | continue; | |
1f8737aa | 1760 | prom_printf("found display : %s, opening... ", path); |
9b6b563c PM |
1761 | |
1762 | ih = call_prom("open", 1, 1, path); | |
1763 | if (ih == 0) { | |
1764 | prom_printf("failed\n"); | |
1765 | continue; | |
1766 | } | |
1767 | ||
1768 | /* Success */ | |
1769 | prom_printf("done\n"); | |
a23414be | 1770 | prom_setprop(node, path, "linux,opened", NULL, 0); |
9b6b563c PM |
1771 | |
1772 | /* Setup a usable color table when the appropriate | |
1773 | * method is available. Should update this to set-colors */ | |
1774 | clut = RELOC(default_colors); | |
1775 | for (i = 0; i < 32; i++, clut += 3) | |
1776 | if (prom_set_color(ih, i, clut[0], clut[1], | |
1777 | clut[2]) != 0) | |
1778 | break; | |
1779 | ||
1780 | #ifdef CONFIG_LOGO_LINUX_CLUT224 | |
1781 | clut = PTRRELOC(RELOC(logo_linux_clut224.clut)); | |
1782 | for (i = 0; i < RELOC(logo_linux_clut224.clutsize); i++, clut += 3) | |
1783 | if (prom_set_color(ih, i + 32, clut[0], clut[1], | |
1784 | clut[2]) != 0) | |
1785 | break; | |
1786 | #endif /* CONFIG_LOGO_LINUX_CLUT224 */ | |
9b6b563c PM |
1787 | } |
1788 | } | |
1789 | ||
1790 | ||
1791 | /* Return (relocated) pointer to this much memory: moves initrd if reqd. */ | |
1792 | static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end, | |
1793 | unsigned long needed, unsigned long align) | |
1794 | { | |
1795 | void *ret; | |
1796 | ||
1797 | *mem_start = _ALIGN(*mem_start, align); | |
1798 | while ((*mem_start + needed) > *mem_end) { | |
1799 | unsigned long room, chunk; | |
1800 | ||
1801 | prom_debug("Chunk exhausted, claiming more at %x...\n", | |
1802 | RELOC(alloc_bottom)); | |
1803 | room = RELOC(alloc_top) - RELOC(alloc_bottom); | |
1804 | if (room > DEVTREE_CHUNK_SIZE) | |
1805 | room = DEVTREE_CHUNK_SIZE; | |
1806 | if (room < PAGE_SIZE) | |
1807 | prom_panic("No memory for flatten_device_tree (no room)"); | |
1808 | chunk = alloc_up(room, 0); | |
1809 | if (chunk == 0) | |
1810 | prom_panic("No memory for flatten_device_tree (claim failed)"); | |
1811 | *mem_end = RELOC(alloc_top); | |
1812 | } | |
1813 | ||
1814 | ret = (void *)*mem_start; | |
1815 | *mem_start += needed; | |
1816 | ||
1817 | return ret; | |
1818 | } | |
1819 | ||
1820 | #define dt_push_token(token, mem_start, mem_end) \ | |
1821 | do { *((u32 *)make_room(mem_start, mem_end, 4, 4)) = token; } while(0) | |
1822 | ||
1823 | static unsigned long __init dt_find_string(char *str) | |
1824 | { | |
1825 | char *s, *os; | |
1826 | ||
1827 | s = os = (char *)RELOC(dt_string_start); | |
1828 | s += 4; | |
1829 | while (s < (char *)RELOC(dt_string_end)) { | |
1830 | if (strcmp(s, str) == 0) | |
1831 | return s - os; | |
1832 | s += strlen(s) + 1; | |
1833 | } | |
1834 | return 0; | |
1835 | } | |
1836 | ||
1837 | /* | |
1838 | * The Open Firmware 1275 specification states properties must be 31 bytes or | |
1839 | * less, however not all firmwares obey this. Make it 64 bytes to be safe. | |
1840 | */ | |
1841 | #define MAX_PROPERTY_NAME 64 | |
1842 | ||
1843 | static void __init scan_dt_build_strings(phandle node, | |
1844 | unsigned long *mem_start, | |
1845 | unsigned long *mem_end) | |
1846 | { | |
1847 | char *prev_name, *namep, *sstart; | |
1848 | unsigned long soff; | |
1849 | phandle child; | |
1850 | ||
1851 | sstart = (char *)RELOC(dt_string_start); | |
1852 | ||
1853 | /* get and store all property names */ | |
1854 | prev_name = RELOC(""); | |
1855 | for (;;) { | |
1856 | /* 64 is max len of name including nul. */ | |
1857 | namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1); | |
1858 | if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) { | |
1859 | /* No more nodes: unwind alloc */ | |
1860 | *mem_start = (unsigned long)namep; | |
1861 | break; | |
1862 | } | |
1863 | ||
1864 | /* skip "name" */ | |
1865 | if (strcmp(namep, RELOC("name")) == 0) { | |
1866 | *mem_start = (unsigned long)namep; | |
1867 | prev_name = RELOC("name"); | |
1868 | continue; | |
1869 | } | |
1870 | /* get/create string entry */ | |
1871 | soff = dt_find_string(namep); | |
1872 | if (soff != 0) { | |
1873 | *mem_start = (unsigned long)namep; | |
1874 | namep = sstart + soff; | |
1875 | } else { | |
1876 | /* Trim off some if we can */ | |
1877 | *mem_start = (unsigned long)namep + strlen(namep) + 1; | |
1878 | RELOC(dt_string_end) = *mem_start; | |
1879 | } | |
1880 | prev_name = namep; | |
1881 | } | |
1882 | ||
1883 | /* do all our children */ | |
1884 | child = call_prom("child", 1, 1, node); | |
1885 | while (child != 0) { | |
1886 | scan_dt_build_strings(child, mem_start, mem_end); | |
1887 | child = call_prom("peer", 1, 1, child); | |
1888 | } | |
1889 | } | |
1890 | ||
1891 | static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start, | |
1892 | unsigned long *mem_end) | |
1893 | { | |
1894 | phandle child; | |
1895 | char *namep, *prev_name, *sstart, *p, *ep, *lp, *path; | |
1896 | unsigned long soff; | |
1897 | unsigned char *valp; | |
1898 | static char pname[MAX_PROPERTY_NAME]; | |
c4988820 | 1899 | int l, room; |
9b6b563c PM |
1900 | |
1901 | dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end); | |
1902 | ||
1903 | /* get the node's full name */ | |
1904 | namep = (char *)*mem_start; | |
c4988820 PM |
1905 | room = *mem_end - *mem_start; |
1906 | if (room > 255) | |
1907 | room = 255; | |
1908 | l = call_prom("package-to-path", 3, 1, node, namep, room); | |
9b6b563c PM |
1909 | if (l >= 0) { |
1910 | /* Didn't fit? Get more room. */ | |
c4988820 PM |
1911 | if (l >= room) { |
1912 | if (l >= *mem_end - *mem_start) | |
1913 | namep = make_room(mem_start, mem_end, l+1, 1); | |
9b6b563c PM |
1914 | call_prom("package-to-path", 3, 1, node, namep, l); |
1915 | } | |
1916 | namep[l] = '\0'; | |
1917 | ||
1918 | /* Fixup an Apple bug where they have bogus \0 chars in the | |
a575b807 PM |
1919 | * middle of the path in some properties, and extract |
1920 | * the unit name (everything after the last '/'). | |
9b6b563c | 1921 | */ |
a575b807 | 1922 | for (lp = p = namep, ep = namep + l; p < ep; p++) { |
9b6b563c | 1923 | if (*p == '/') |
a575b807 PM |
1924 | lp = namep; |
1925 | else if (*p != 0) | |
1926 | *lp++ = *p; | |
1927 | } | |
1928 | *lp = 0; | |
1929 | *mem_start = _ALIGN((unsigned long)lp + 1, 4); | |
9b6b563c PM |
1930 | } |
1931 | ||
1932 | /* get it again for debugging */ | |
1933 | path = RELOC(prom_scratch); | |
1934 | memset(path, 0, PROM_SCRATCH_SIZE); | |
1935 | call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); | |
1936 | ||
1937 | /* get and store all properties */ | |
1938 | prev_name = RELOC(""); | |
1939 | sstart = (char *)RELOC(dt_string_start); | |
1940 | for (;;) { | |
1941 | if (call_prom("nextprop", 3, 1, node, prev_name, | |
1942 | RELOC(pname)) != 1) | |
1943 | break; | |
1944 | ||
1945 | /* skip "name" */ | |
1946 | if (strcmp(RELOC(pname), RELOC("name")) == 0) { | |
1947 | prev_name = RELOC("name"); | |
1948 | continue; | |
1949 | } | |
1950 | ||
1951 | /* find string offset */ | |
1952 | soff = dt_find_string(RELOC(pname)); | |
1953 | if (soff == 0) { | |
1954 | prom_printf("WARNING: Can't find string index for" | |
1955 | " <%s>, node %s\n", RELOC(pname), path); | |
1956 | break; | |
1957 | } | |
1958 | prev_name = sstart + soff; | |
1959 | ||
1960 | /* get length */ | |
1961 | l = call_prom("getproplen", 2, 1, node, RELOC(pname)); | |
1962 | ||
1963 | /* sanity checks */ | |
1964 | if (l == PROM_ERROR) | |
1965 | continue; | |
1966 | if (l > MAX_PROPERTY_LENGTH) { | |
1967 | prom_printf("WARNING: ignoring large property "); | |
1968 | /* It seems OF doesn't null-terminate the path :-( */ | |
1969 | prom_printf("[%s] ", path); | |
1970 | prom_printf("%s length 0x%x\n", RELOC(pname), l); | |
1971 | continue; | |
1972 | } | |
1973 | ||
1974 | /* push property head */ | |
1975 | dt_push_token(OF_DT_PROP, mem_start, mem_end); | |
1976 | dt_push_token(l, mem_start, mem_end); | |
1977 | dt_push_token(soff, mem_start, mem_end); | |
1978 | ||
1979 | /* push property content */ | |
1980 | valp = make_room(mem_start, mem_end, l, 4); | |
1981 | call_prom("getprop", 4, 1, node, RELOC(pname), valp, l); | |
1982 | *mem_start = _ALIGN(*mem_start, 4); | |
1983 | } | |
1984 | ||
1985 | /* Add a "linux,phandle" property. */ | |
1986 | soff = dt_find_string(RELOC("linux,phandle")); | |
1987 | if (soff == 0) | |
1988 | prom_printf("WARNING: Can't find string index for" | |
1989 | " <linux-phandle> node %s\n", path); | |
1990 | else { | |
1991 | dt_push_token(OF_DT_PROP, mem_start, mem_end); | |
1992 | dt_push_token(4, mem_start, mem_end); | |
1993 | dt_push_token(soff, mem_start, mem_end); | |
1994 | valp = make_room(mem_start, mem_end, 4, 4); | |
1995 | *(u32 *)valp = node; | |
1996 | } | |
1997 | ||
1998 | /* do all our children */ | |
1999 | child = call_prom("child", 1, 1, node); | |
2000 | while (child != 0) { | |
2001 | scan_dt_build_struct(child, mem_start, mem_end); | |
2002 | child = call_prom("peer", 1, 1, child); | |
2003 | } | |
2004 | ||
2005 | dt_push_token(OF_DT_END_NODE, mem_start, mem_end); | |
2006 | } | |
2007 | ||
2008 | static void __init flatten_device_tree(void) | |
2009 | { | |
2010 | phandle root; | |
2011 | unsigned long mem_start, mem_end, room; | |
2012 | struct boot_param_header *hdr; | |
2013 | struct prom_t *_prom = &RELOC(prom); | |
2014 | char *namep; | |
2015 | u64 *rsvmap; | |
2016 | ||
2017 | /* | |
2018 | * Check how much room we have between alloc top & bottom (+/- a | |
2019 | * few pages), crop to 4Mb, as this is our "chuck" size | |
2020 | */ | |
2021 | room = RELOC(alloc_top) - RELOC(alloc_bottom) - 0x4000; | |
2022 | if (room > DEVTREE_CHUNK_SIZE) | |
2023 | room = DEVTREE_CHUNK_SIZE; | |
2024 | prom_debug("starting device tree allocs at %x\n", RELOC(alloc_bottom)); | |
2025 | ||
2026 | /* Now try to claim that */ | |
2027 | mem_start = (unsigned long)alloc_up(room, PAGE_SIZE); | |
2028 | if (mem_start == 0) | |
2029 | prom_panic("Can't allocate initial device-tree chunk\n"); | |
2030 | mem_end = RELOC(alloc_top); | |
2031 | ||
2032 | /* Get root of tree */ | |
2033 | root = call_prom("peer", 1, 1, (phandle)0); | |
2034 | if (root == (phandle)0) | |
2035 | prom_panic ("couldn't get device tree root\n"); | |
2036 | ||
2037 | /* Build header and make room for mem rsv map */ | |
2038 | mem_start = _ALIGN(mem_start, 4); | |
2039 | hdr = make_room(&mem_start, &mem_end, | |
2040 | sizeof(struct boot_param_header), 4); | |
2041 | RELOC(dt_header_start) = (unsigned long)hdr; | |
2042 | rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8); | |
2043 | ||
2044 | /* Start of strings */ | |
2045 | mem_start = PAGE_ALIGN(mem_start); | |
2046 | RELOC(dt_string_start) = mem_start; | |
2047 | mem_start += 4; /* hole */ | |
2048 | ||
2049 | /* Add "linux,phandle" in there, we'll need it */ | |
2050 | namep = make_room(&mem_start, &mem_end, 16, 1); | |
2051 | strcpy(namep, RELOC("linux,phandle")); | |
2052 | mem_start = (unsigned long)namep + strlen(namep) + 1; | |
2053 | ||
2054 | /* Build string array */ | |
2055 | prom_printf("Building dt strings...\n"); | |
2056 | scan_dt_build_strings(root, &mem_start, &mem_end); | |
2057 | RELOC(dt_string_end) = mem_start; | |
2058 | ||
2059 | /* Build structure */ | |
2060 | mem_start = PAGE_ALIGN(mem_start); | |
2061 | RELOC(dt_struct_start) = mem_start; | |
2062 | prom_printf("Building dt structure...\n"); | |
2063 | scan_dt_build_struct(root, &mem_start, &mem_end); | |
2064 | dt_push_token(OF_DT_END, &mem_start, &mem_end); | |
2065 | RELOC(dt_struct_end) = PAGE_ALIGN(mem_start); | |
2066 | ||
2067 | /* Finish header */ | |
2068 | hdr->boot_cpuid_phys = _prom->cpu; | |
2069 | hdr->magic = OF_DT_HEADER; | |
2070 | hdr->totalsize = RELOC(dt_struct_end) - RELOC(dt_header_start); | |
2071 | hdr->off_dt_struct = RELOC(dt_struct_start) - RELOC(dt_header_start); | |
2072 | hdr->off_dt_strings = RELOC(dt_string_start) - RELOC(dt_header_start); | |
2073 | hdr->dt_strings_size = RELOC(dt_string_end) - RELOC(dt_string_start); | |
2074 | hdr->off_mem_rsvmap = ((unsigned long)rsvmap) - RELOC(dt_header_start); | |
2075 | hdr->version = OF_DT_VERSION; | |
2076 | /* Version 16 is not backward compatible */ | |
2077 | hdr->last_comp_version = 0x10; | |
2078 | ||
4d1f3f25 | 2079 | /* Copy the reserve map in */ |
9b6b563c PM |
2080 | memcpy(rsvmap, RELOC(mem_reserve_map), sizeof(mem_reserve_map)); |
2081 | ||
2082 | #ifdef DEBUG_PROM | |
2083 | { | |
2084 | int i; | |
2085 | prom_printf("reserved memory map:\n"); | |
2086 | for (i = 0; i < RELOC(mem_reserve_cnt); i++) | |
2087 | prom_printf(" %x - %x\n", | |
2088 | RELOC(mem_reserve_map)[i].base, | |
2089 | RELOC(mem_reserve_map)[i].size); | |
2090 | } | |
2091 | #endif | |
4d1f3f25 JX |
2092 | /* Bump mem_reserve_cnt to cause further reservations to fail |
2093 | * since it's too late. | |
2094 | */ | |
9b6b563c PM |
2095 | RELOC(mem_reserve_cnt) = MEM_RESERVE_MAP_SIZE; |
2096 | ||
2097 | prom_printf("Device tree strings 0x%x -> 0x%x\n", | |
2098 | RELOC(dt_string_start), RELOC(dt_string_end)); | |
2099 | prom_printf("Device tree struct 0x%x -> 0x%x\n", | |
2100 | RELOC(dt_struct_start), RELOC(dt_struct_end)); | |
2101 | ||
2102 | } | |
2103 | ||
54f4ee18 HB |
2104 | #ifdef CONFIG_PPC_MAPLE |
2105 | /* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property. | |
2106 | * The values are bad, and it doesn't even have the right number of cells. */ | |
2107 | static void __init fixup_device_tree_maple(void) | |
9b6b563c | 2108 | { |
54f4ee18 | 2109 | phandle isa; |
980a6513 | 2110 | u32 rloc = 0x01002000; /* IO space; PCI device = 4 */ |
54f4ee18 | 2111 | u32 isa_ranges[6]; |
980a6513 BH |
2112 | char *name; |
2113 | ||
2114 | name = "/ht@0/isa@4"; | |
2115 | isa = call_prom("finddevice", 1, 1, ADDR(name)); | |
2116 | if (!PHANDLE_VALID(isa)) { | |
2117 | name = "/ht@0/isa@6"; | |
2118 | isa = call_prom("finddevice", 1, 1, ADDR(name)); | |
2119 | rloc = 0x01003000; /* IO space; PCI device = 6 */ | |
2120 | } | |
54f4ee18 HB |
2121 | if (!PHANDLE_VALID(isa)) |
2122 | return; | |
2123 | ||
980a6513 BH |
2124 | if (prom_getproplen(isa, "ranges") != 12) |
2125 | return; | |
54f4ee18 HB |
2126 | if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges)) |
2127 | == PROM_ERROR) | |
2128 | return; | |
2129 | ||
2130 | if (isa_ranges[0] != 0x1 || | |
2131 | isa_ranges[1] != 0xf4000000 || | |
2132 | isa_ranges[2] != 0x00010000) | |
2133 | return; | |
2134 | ||
980a6513 | 2135 | prom_printf("Fixing up bogus ISA range on Maple/Apache...\n"); |
54f4ee18 HB |
2136 | |
2137 | isa_ranges[0] = 0x1; | |
2138 | isa_ranges[1] = 0x0; | |
980a6513 | 2139 | isa_ranges[2] = rloc; |
54f4ee18 HB |
2140 | isa_ranges[3] = 0x0; |
2141 | isa_ranges[4] = 0x0; | |
2142 | isa_ranges[5] = 0x00010000; | |
980a6513 | 2143 | prom_setprop(isa, name, "ranges", |
54f4ee18 HB |
2144 | isa_ranges, sizeof(isa_ranges)); |
2145 | } | |
8f101a05 HC |
2146 | |
2147 | #define CPC925_MC_START 0xf8000000 | |
2148 | #define CPC925_MC_LENGTH 0x1000000 | |
2149 | /* The values for memory-controller don't have right number of cells */ | |
2150 | static void __init fixup_device_tree_maple_memory_controller(void) | |
2151 | { | |
2152 | phandle mc; | |
2153 | u32 mc_reg[4]; | |
2154 | char *name = "/hostbridge@f8000000"; | |
2155 | struct prom_t *_prom = &RELOC(prom); | |
2156 | u32 ac, sc; | |
2157 | ||
2158 | mc = call_prom("finddevice", 1, 1, ADDR(name)); | |
2159 | if (!PHANDLE_VALID(mc)) | |
2160 | return; | |
2161 | ||
2162 | if (prom_getproplen(mc, "reg") != 8) | |
2163 | return; | |
2164 | ||
2165 | prom_getprop(_prom->root, "#address-cells", &ac, sizeof(ac)); | |
2166 | prom_getprop(_prom->root, "#size-cells", &sc, sizeof(sc)); | |
2167 | if ((ac != 2) || (sc != 2)) | |
2168 | return; | |
2169 | ||
2170 | if (prom_getprop(mc, "reg", mc_reg, sizeof(mc_reg)) == PROM_ERROR) | |
2171 | return; | |
2172 | ||
2173 | if (mc_reg[0] != CPC925_MC_START || mc_reg[1] != CPC925_MC_LENGTH) | |
2174 | return; | |
2175 | ||
2176 | prom_printf("Fixing up bogus hostbridge on Maple...\n"); | |
2177 | ||
2178 | mc_reg[0] = 0x0; | |
2179 | mc_reg[1] = CPC925_MC_START; | |
2180 | mc_reg[2] = 0x0; | |
2181 | mc_reg[3] = CPC925_MC_LENGTH; | |
2182 | prom_setprop(mc, name, "reg", mc_reg, sizeof(mc_reg)); | |
2183 | } | |
54f4ee18 HB |
2184 | #else |
2185 | #define fixup_device_tree_maple() | |
8f101a05 | 2186 | #define fixup_device_tree_maple_memory_controller() |
54f4ee18 HB |
2187 | #endif |
2188 | ||
e8c0acf9 | 2189 | #ifdef CONFIG_PPC_CHRP |
e4805922 OH |
2190 | /* |
2191 | * Pegasos and BriQ lacks the "ranges" property in the isa node | |
2192 | * Pegasos needs decimal IRQ 14/15, not hexadecimal | |
556ecf9b | 2193 | * Pegasos has the IDE configured in legacy mode, but advertised as native |
e4805922 | 2194 | */ |
e8c0acf9 BH |
2195 | static void __init fixup_device_tree_chrp(void) |
2196 | { | |
e4805922 OH |
2197 | phandle ph; |
2198 | u32 prop[6]; | |
26c5032e | 2199 | u32 rloc = 0x01006000; /* IO space; PCI device = 12 */ |
e8c0acf9 BH |
2200 | char *name; |
2201 | int rc; | |
2202 | ||
2203 | name = "/pci@80000000/isa@c"; | |
e4805922 OH |
2204 | ph = call_prom("finddevice", 1, 1, ADDR(name)); |
2205 | if (!PHANDLE_VALID(ph)) { | |
26c5032e | 2206 | name = "/pci@ff500000/isa@6"; |
e4805922 | 2207 | ph = call_prom("finddevice", 1, 1, ADDR(name)); |
26c5032e BH |
2208 | rloc = 0x01003000; /* IO space; PCI device = 6 */ |
2209 | } | |
e4805922 OH |
2210 | if (PHANDLE_VALID(ph)) { |
2211 | rc = prom_getproplen(ph, "ranges"); | |
2212 | if (rc == 0 || rc == PROM_ERROR) { | |
2213 | prom_printf("Fixing up missing ISA range on Pegasos...\n"); | |
2214 | ||
2215 | prop[0] = 0x1; | |
2216 | prop[1] = 0x0; | |
2217 | prop[2] = rloc; | |
2218 | prop[3] = 0x0; | |
2219 | prop[4] = 0x0; | |
2220 | prop[5] = 0x00010000; | |
2221 | prom_setprop(ph, name, "ranges", prop, sizeof(prop)); | |
2222 | } | |
2223 | } | |
e8c0acf9 | 2224 | |
e4805922 OH |
2225 | name = "/pci@80000000/ide@C,1"; |
2226 | ph = call_prom("finddevice", 1, 1, ADDR(name)); | |
2227 | if (PHANDLE_VALID(ph)) { | |
2228 | prom_printf("Fixing up IDE interrupt on Pegasos...\n"); | |
2229 | prop[0] = 14; | |
2230 | prop[1] = 0x0; | |
556ecf9b OH |
2231 | prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32)); |
2232 | prom_printf("Fixing up IDE class-code on Pegasos...\n"); | |
2233 | rc = prom_getprop(ph, "class-code", prop, sizeof(u32)); | |
2234 | if (rc == sizeof(u32)) { | |
2235 | prop[0] &= ~0x5; | |
2236 | prom_setprop(ph, name, "class-code", prop, sizeof(u32)); | |
2237 | } | |
e4805922 | 2238 | } |
e8c0acf9 BH |
2239 | } |
2240 | #else | |
2241 | #define fixup_device_tree_chrp() | |
2242 | #endif | |
2243 | ||
9b6b563c | 2244 | #if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC) |
54f4ee18 HB |
2245 | static void __init fixup_device_tree_pmac(void) |
2246 | { | |
9b6b563c PM |
2247 | phandle u3, i2c, mpic; |
2248 | u32 u3_rev; | |
2249 | u32 interrupts[2]; | |
2250 | u32 parent; | |
2251 | ||
2252 | /* Some G5s have a missing interrupt definition, fix it up here */ | |
2253 | u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000")); | |
2254 | if (!PHANDLE_VALID(u3)) | |
2255 | return; | |
2256 | i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000")); | |
2257 | if (!PHANDLE_VALID(i2c)) | |
2258 | return; | |
2259 | mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000")); | |
2260 | if (!PHANDLE_VALID(mpic)) | |
2261 | return; | |
2262 | ||
2263 | /* check if proper rev of u3 */ | |
2264 | if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev)) | |
2265 | == PROM_ERROR) | |
2266 | return; | |
7d49697e | 2267 | if (u3_rev < 0x35 || u3_rev > 0x39) |
9b6b563c PM |
2268 | return; |
2269 | /* does it need fixup ? */ | |
2270 | if (prom_getproplen(i2c, "interrupts") > 0) | |
2271 | return; | |
2272 | ||
2273 | prom_printf("fixing up bogus interrupts for u3 i2c...\n"); | |
2274 | ||
2275 | /* interrupt on this revision of u3 is number 0 and level */ | |
2276 | interrupts[0] = 0; | |
2277 | interrupts[1] = 1; | |
a23414be PM |
2278 | prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts", |
2279 | &interrupts, sizeof(interrupts)); | |
9b6b563c | 2280 | parent = (u32)mpic; |
a23414be PM |
2281 | prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent", |
2282 | &parent, sizeof(parent)); | |
9b6b563c | 2283 | } |
54f4ee18 HB |
2284 | #else |
2285 | #define fixup_device_tree_pmac() | |
2286 | #endif | |
9b6b563c | 2287 | |
88fd2a9d | 2288 | #ifdef CONFIG_PPC_EFIKA |
94d2dde7 GL |
2289 | /* |
2290 | * The MPC5200 FEC driver requires an phy-handle property to tell it how | |
2291 | * to talk to the phy. If the phy-handle property is missing, then this | |
2292 | * function is called to add the appropriate nodes and link it to the | |
2293 | * ethernet node. | |
2294 | */ | |
2295 | static void __init fixup_device_tree_efika_add_phy(void) | |
88fd2a9d | 2296 | { |
88fd2a9d SM |
2297 | u32 node; |
2298 | char prop[64]; | |
94d2dde7 | 2299 | int rv; |
88fd2a9d | 2300 | |
94d2dde7 GL |
2301 | /* Check if /builtin/ethernet exists - bail if it doesn't */ |
2302 | node = call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet")); | |
88fd2a9d SM |
2303 | if (!PHANDLE_VALID(node)) |
2304 | return; | |
2305 | ||
94d2dde7 GL |
2306 | /* Check if the phy-handle property exists - bail if it does */ |
2307 | rv = prom_getprop(node, "phy-handle", prop, sizeof(prop)); | |
2308 | if (!rv) | |
88fd2a9d SM |
2309 | return; |
2310 | ||
94d2dde7 GL |
2311 | /* |
2312 | * At this point the ethernet device doesn't have a phy described. | |
2313 | * Now we need to add the missing phy node and linkage | |
2314 | */ | |
6f4347c9 | 2315 | |
94d2dde7 | 2316 | /* Check for an MDIO bus node - if missing then create one */ |
6f4347c9 OH |
2317 | node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio")); |
2318 | if (!PHANDLE_VALID(node)) { | |
2319 | prom_printf("Adding Ethernet MDIO node\n"); | |
2320 | call_prom("interpret", 1, 1, | |
2321 | " s\" /builtin\" find-device" | |
2322 | " new-device" | |
2323 | " 1 encode-int s\" #address-cells\" property" | |
2324 | " 0 encode-int s\" #size-cells\" property" | |
94d2dde7 GL |
2325 | " s\" mdio\" device-name" |
2326 | " s\" fsl,mpc5200b-mdio\" encode-string" | |
6f4347c9 OH |
2327 | " s\" compatible\" property" |
2328 | " 0xf0003000 0x400 reg" | |
2329 | " 0x2 encode-int" | |
2330 | " 0x5 encode-int encode+" | |
2331 | " 0x3 encode-int encode+" | |
2332 | " s\" interrupts\" property" | |
2333 | " finish-device"); | |
2334 | }; | |
2335 | ||
94d2dde7 GL |
2336 | /* Check for a PHY device node - if missing then create one and |
2337 | * give it's phandle to the ethernet node */ | |
2338 | node = call_prom("finddevice", 1, 1, | |
2339 | ADDR("/builtin/mdio/ethernet-phy")); | |
6f4347c9 OH |
2340 | if (!PHANDLE_VALID(node)) { |
2341 | prom_printf("Adding Ethernet PHY node\n"); | |
2342 | call_prom("interpret", 1, 1, | |
2343 | " s\" /builtin/mdio\" find-device" | |
2344 | " new-device" | |
2345 | " s\" ethernet-phy\" device-name" | |
2346 | " 0x10 encode-int s\" reg\" property" | |
2347 | " my-self" | |
2348 | " ihandle>phandle" | |
2349 | " finish-device" | |
2350 | " s\" /builtin/ethernet\" find-device" | |
2351 | " encode-int" | |
2352 | " s\" phy-handle\" property" | |
2353 | " device-end"); | |
2354 | } | |
94d2dde7 GL |
2355 | } |
2356 | ||
2357 | static void __init fixup_device_tree_efika(void) | |
2358 | { | |
2359 | int sound_irq[3] = { 2, 2, 0 }; | |
2360 | int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0, | |
2361 | 3,4,0, 3,5,0, 3,6,0, 3,7,0, | |
2362 | 3,8,0, 3,9,0, 3,10,0, 3,11,0, | |
2363 | 3,12,0, 3,13,0, 3,14,0, 3,15,0 }; | |
2364 | u32 node; | |
2365 | char prop[64]; | |
2366 | int rv, len; | |
2367 | ||
2368 | /* Check if we're really running on a EFIKA */ | |
2369 | node = call_prom("finddevice", 1, 1, ADDR("/")); | |
2370 | if (!PHANDLE_VALID(node)) | |
2371 | return; | |
2372 | ||
2373 | rv = prom_getprop(node, "model", prop, sizeof(prop)); | |
2374 | if (rv == PROM_ERROR) | |
2375 | return; | |
2376 | if (strcmp(prop, "EFIKA5K2")) | |
2377 | return; | |
2378 | ||
2379 | prom_printf("Applying EFIKA device tree fixups\n"); | |
2380 | ||
2381 | /* Claiming to be 'chrp' is death */ | |
2382 | node = call_prom("finddevice", 1, 1, ADDR("/")); | |
2383 | rv = prom_getprop(node, "device_type", prop, sizeof(prop)); | |
2384 | if (rv != PROM_ERROR && (strcmp(prop, "chrp") == 0)) | |
2385 | prom_setprop(node, "/", "device_type", "efika", sizeof("efika")); | |
2386 | ||
7f4392cd DW |
2387 | /* CODEGEN,description is exposed in /proc/cpuinfo so |
2388 | fix that too */ | |
2389 | rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop)); | |
2390 | if (rv != PROM_ERROR && (strstr(prop, "CHRP"))) | |
2391 | prom_setprop(node, "/", "CODEGEN,description", | |
2392 | "Efika 5200B PowerPC System", | |
2393 | sizeof("Efika 5200B PowerPC System")); | |
2394 | ||
94d2dde7 GL |
2395 | /* Fixup bestcomm interrupts property */ |
2396 | node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm")); | |
2397 | if (PHANDLE_VALID(node)) { | |
2398 | len = prom_getproplen(node, "interrupts"); | |
2399 | if (len == 12) { | |
2400 | prom_printf("Fixing bestcomm interrupts property\n"); | |
2401 | prom_setprop(node, "/builtin/bestcom", "interrupts", | |
2402 | bcomm_irq, sizeof(bcomm_irq)); | |
2403 | } | |
2404 | } | |
2405 | ||
2406 | /* Fixup sound interrupts property */ | |
2407 | node = call_prom("finddevice", 1, 1, ADDR("/builtin/sound")); | |
2408 | if (PHANDLE_VALID(node)) { | |
2409 | rv = prom_getprop(node, "interrupts", prop, sizeof(prop)); | |
2410 | if (rv == PROM_ERROR) { | |
2411 | prom_printf("Adding sound interrupts property\n"); | |
2412 | prom_setprop(node, "/builtin/sound", "interrupts", | |
2413 | sound_irq, sizeof(sound_irq)); | |
2414 | } | |
2415 | } | |
6f4347c9 | 2416 | |
94d2dde7 GL |
2417 | /* Make sure ethernet phy-handle property exists */ |
2418 | fixup_device_tree_efika_add_phy(); | |
88fd2a9d SM |
2419 | } |
2420 | #else | |
2421 | #define fixup_device_tree_efika() | |
2422 | #endif | |
2423 | ||
54f4ee18 HB |
2424 | static void __init fixup_device_tree(void) |
2425 | { | |
2426 | fixup_device_tree_maple(); | |
8f101a05 | 2427 | fixup_device_tree_maple_memory_controller(); |
e8c0acf9 | 2428 | fixup_device_tree_chrp(); |
54f4ee18 | 2429 | fixup_device_tree_pmac(); |
88fd2a9d | 2430 | fixup_device_tree_efika(); |
54f4ee18 | 2431 | } |
9b6b563c PM |
2432 | |
2433 | static void __init prom_find_boot_cpu(void) | |
2434 | { | |
e788ff13 | 2435 | struct prom_t *_prom = &RELOC(prom); |
9b6b563c PM |
2436 | u32 getprop_rval; |
2437 | ihandle prom_cpu; | |
2438 | phandle cpu_pkg; | |
2439 | ||
a575b807 | 2440 | _prom->cpu = 0; |
9b6b563c | 2441 | if (prom_getprop(_prom->chosen, "cpu", &prom_cpu, sizeof(prom_cpu)) <= 0) |
a575b807 | 2442 | return; |
9b6b563c PM |
2443 | |
2444 | cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu); | |
2445 | ||
2446 | prom_getprop(cpu_pkg, "reg", &getprop_rval, sizeof(getprop_rval)); | |
2447 | _prom->cpu = getprop_rval; | |
2448 | ||
2c48a7d6 | 2449 | prom_debug("Booting CPU hw index = %lu\n", _prom->cpu); |
9b6b563c PM |
2450 | } |
2451 | ||
2452 | static void __init prom_check_initrd(unsigned long r3, unsigned long r4) | |
2453 | { | |
2454 | #ifdef CONFIG_BLK_DEV_INITRD | |
e788ff13 | 2455 | struct prom_t *_prom = &RELOC(prom); |
9b6b563c PM |
2456 | |
2457 | if (r3 && r4 && r4 != 0xdeadbeef) { | |
2458 | unsigned long val; | |
2459 | ||
51fae6de | 2460 | RELOC(prom_initrd_start) = is_kernel_addr(r3) ? __pa(r3) : r3; |
9b6b563c PM |
2461 | RELOC(prom_initrd_end) = RELOC(prom_initrd_start) + r4; |
2462 | ||
2463 | val = RELOC(prom_initrd_start); | |
a23414be PM |
2464 | prom_setprop(_prom->chosen, "/chosen", "linux,initrd-start", |
2465 | &val, sizeof(val)); | |
9b6b563c | 2466 | val = RELOC(prom_initrd_end); |
a23414be PM |
2467 | prom_setprop(_prom->chosen, "/chosen", "linux,initrd-end", |
2468 | &val, sizeof(val)); | |
9b6b563c PM |
2469 | |
2470 | reserve_mem(RELOC(prom_initrd_start), | |
2471 | RELOC(prom_initrd_end) - RELOC(prom_initrd_start)); | |
2472 | ||
2473 | prom_debug("initrd_start=0x%x\n", RELOC(prom_initrd_start)); | |
2474 | prom_debug("initrd_end=0x%x\n", RELOC(prom_initrd_end)); | |
2475 | } | |
2476 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
2477 | } | |
2478 | ||
2479 | /* | |
2480 | * We enter here early on, when the Open Firmware prom is still | |
2481 | * handling exceptions and the MMU hash table for us. | |
2482 | */ | |
2483 | ||
2484 | unsigned long __init prom_init(unsigned long r3, unsigned long r4, | |
2485 | unsigned long pp, | |
549e8152 PM |
2486 | unsigned long r6, unsigned long r7, |
2487 | unsigned long kbase) | |
9b6b563c | 2488 | { |
e788ff13 | 2489 | struct prom_t *_prom; |
9b6b563c | 2490 | unsigned long hdr; |
9b6b563c PM |
2491 | |
2492 | #ifdef CONFIG_PPC32 | |
549e8152 | 2493 | unsigned long offset = reloc_offset(); |
9b6b563c PM |
2494 | reloc_got2(offset); |
2495 | #endif | |
2496 | ||
2497 | _prom = &RELOC(prom); | |
2498 | ||
2499 | /* | |
2500 | * First zero the BSS | |
2501 | */ | |
2502 | memset(&RELOC(__bss_start), 0, __bss_stop - __bss_start); | |
2503 | ||
2504 | /* | |
2505 | * Init interface to Open Firmware, get some node references, | |
2506 | * like /chosen | |
2507 | */ | |
2508 | prom_init_client_services(pp); | |
2509 | ||
2510 | /* | |
a23414be PM |
2511 | * See if this OF is old enough that we need to do explicit maps |
2512 | * and other workarounds | |
9b6b563c | 2513 | */ |
a23414be | 2514 | prom_find_mmu(); |
9b6b563c | 2515 | |
a575b807 | 2516 | /* |
a23414be | 2517 | * Init prom stdout device |
a575b807 | 2518 | */ |
a23414be | 2519 | prom_init_stdout(); |
a575b807 | 2520 | |
151a9f4a | 2521 | prom_printf("Preparing to boot %s", RELOC(linux_banner)); |
e7943fbb | 2522 | |
9b6b563c PM |
2523 | /* |
2524 | * Get default machine type. At this point, we do not differentiate | |
2525 | * between pSeries SMP and pSeries LPAR | |
2526 | */ | |
2527 | RELOC(of_platform) = prom_find_machine_type(); | |
9b6b563c | 2528 | |
549e8152 | 2529 | #ifndef CONFIG_RELOCATABLE |
add60ef3 OH |
2530 | /* Bail if this is a kdump kernel. */ |
2531 | if (PHYSICAL_START > 0) | |
2532 | prom_panic("Error: You can't boot a kdump kernel from OF!\n"); | |
549e8152 | 2533 | #endif |
add60ef3 OH |
2534 | |
2535 | /* | |
2536 | * Check for an initrd | |
2537 | */ | |
2538 | prom_check_initrd(r3, r4); | |
2539 | ||
9b6b563c PM |
2540 | #ifdef CONFIG_PPC_PSERIES |
2541 | /* | |
2542 | * On pSeries, inform the firmware about our capabilities | |
2543 | */ | |
799d6046 PM |
2544 | if (RELOC(of_platform) == PLATFORM_PSERIES || |
2545 | RELOC(of_platform) == PLATFORM_PSERIES_LPAR) | |
9b6b563c PM |
2546 | prom_send_capabilities(); |
2547 | #endif | |
2548 | ||
9b6b563c | 2549 | /* |
f3f66f59 | 2550 | * Copy the CPU hold code |
9b6b563c | 2551 | */ |
e788ff13 | 2552 | if (RELOC(of_platform) != PLATFORM_POWERMAC) |
549e8152 | 2553 | copy_and_flush(0, kbase, 0x100, 0); |
9b6b563c PM |
2554 | |
2555 | /* | |
2556 | * Do early parsing of command line | |
2557 | */ | |
2558 | early_cmdline_parse(); | |
2559 | ||
2560 | /* | |
2561 | * Initialize memory management within prom_init | |
2562 | */ | |
2563 | prom_init_mem(); | |
2564 | ||
2565 | /* | |
2566 | * Determine which cpu is actually running right _now_ | |
2567 | */ | |
2568 | prom_find_boot_cpu(); | |
2569 | ||
2570 | /* | |
2571 | * Initialize display devices | |
2572 | */ | |
2573 | prom_check_displays(); | |
2574 | ||
2575 | #ifdef CONFIG_PPC64 | |
2576 | /* | |
2577 | * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else | |
2578 | * that uses the allocator, we need to make sure we get the top of memory | |
2579 | * available for us here... | |
2580 | */ | |
2581 | if (RELOC(of_platform) == PLATFORM_PSERIES) | |
2582 | prom_initialize_tce_table(); | |
2583 | #endif | |
2584 | ||
2585 | /* | |
2586 | * On non-powermacs, try to instantiate RTAS and puts all CPUs | |
2587 | * in spin-loops. PowerMacs don't have a working RTAS and use | |
2588 | * a different way to spin CPUs | |
2589 | */ | |
2590 | if (RELOC(of_platform) != PLATFORM_POWERMAC) { | |
2591 | prom_instantiate_rtas(); | |
2592 | prom_hold_cpus(); | |
2593 | } | |
2594 | ||
2595 | /* | |
2596 | * Fill in some infos for use by the kernel later on | |
2597 | */ | |
cf68787b BK |
2598 | if (RELOC(prom_memory_limit)) |
2599 | prom_setprop(_prom->chosen, "/chosen", "linux,memory-limit", | |
2600 | &RELOC(prom_memory_limit), | |
2601 | sizeof(prom_memory_limit)); | |
9b6b563c | 2602 | #ifdef CONFIG_PPC64 |
165785e5 | 2603 | if (RELOC(prom_iommu_off)) |
a23414be PM |
2604 | prom_setprop(_prom->chosen, "/chosen", "linux,iommu-off", |
2605 | NULL, 0); | |
9b6b563c | 2606 | |
165785e5 | 2607 | if (RELOC(prom_iommu_force_on)) |
a23414be PM |
2608 | prom_setprop(_prom->chosen, "/chosen", "linux,iommu-force-on", |
2609 | NULL, 0); | |
9b6b563c PM |
2610 | |
2611 | if (RELOC(prom_tce_alloc_start)) { | |
a23414be | 2612 | prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-start", |
9b6b563c PM |
2613 | &RELOC(prom_tce_alloc_start), |
2614 | sizeof(prom_tce_alloc_start)); | |
a23414be | 2615 | prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-end", |
9b6b563c PM |
2616 | &RELOC(prom_tce_alloc_end), |
2617 | sizeof(prom_tce_alloc_end)); | |
2618 | } | |
2619 | #endif | |
2620 | ||
2621 | /* | |
2622 | * Fixup any known bugs in the device-tree | |
2623 | */ | |
2624 | fixup_device_tree(); | |
2625 | ||
2626 | /* | |
2627 | * Now finally create the flattened device-tree | |
2628 | */ | |
1f8737aa | 2629 | prom_printf("copying OF device tree...\n"); |
9b6b563c PM |
2630 | flatten_device_tree(); |
2631 | ||
3825ac0e PM |
2632 | /* |
2633 | * in case stdin is USB and still active on IBM machines... | |
2634 | * Unfortunately quiesce crashes on some powermacs if we have | |
2635 | * closed stdin already (in particular the powerbook 101). | |
2636 | */ | |
2637 | if (RELOC(of_platform) != PLATFORM_POWERMAC) | |
2638 | prom_close_stdin(); | |
9b6b563c PM |
2639 | |
2640 | /* | |
2641 | * Call OF "quiesce" method to shut down pending DMA's from | |
2642 | * devices etc... | |
2643 | */ | |
1f8737aa | 2644 | prom_printf("Calling quiesce...\n"); |
9b6b563c PM |
2645 | call_prom("quiesce", 0, 0); |
2646 | ||
2647 | /* | |
2648 | * And finally, call the kernel passing it the flattened device | |
2649 | * tree and NULL as r5, thus triggering the new entry point which | |
2650 | * is common to us and kexec | |
2651 | */ | |
2652 | hdr = RELOC(dt_header_start); | |
2653 | prom_printf("returning from prom_init\n"); | |
2654 | prom_debug("->dt_header_start=0x%x\n", hdr); | |
2655 | ||
2656 | #ifdef CONFIG_PPC32 | |
2657 | reloc_got2(-offset); | |
2658 | #endif | |
2659 | ||
549e8152 | 2660 | __start(hdr, kbase, 0); |
9b6b563c PM |
2661 | |
2662 | return 0; | |
2663 | } |