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> | |
27f44888 | 46 | #include <asm/opal.h> |
9b6b563c | 47 | |
9b6b563c | 48 | #include <linux/linux_logo.h> |
9b6b563c PM |
49 | |
50 | /* | |
51 | * Properties whose value is longer than this get excluded from our | |
52 | * copy of the device tree. This value does need to be big enough to | |
53 | * ensure that we don't lose things like the interrupt-map property | |
54 | * on a PCI-PCI bridge. | |
55 | */ | |
56 | #define MAX_PROPERTY_LENGTH (1UL * 1024 * 1024) | |
57 | ||
58 | /* | |
59 | * Eventually bump that one up | |
60 | */ | |
61 | #define DEVTREE_CHUNK_SIZE 0x100000 | |
62 | ||
63 | /* | |
64 | * This is the size of the local memory reserve map that gets copied | |
65 | * into the boot params passed to the kernel. That size is totally | |
66 | * flexible as the kernel just reads the list until it encounters an | |
67 | * entry with size 0, so it can be changed without breaking binary | |
68 | * compatibility | |
69 | */ | |
70 | #define MEM_RESERVE_MAP_SIZE 8 | |
71 | ||
72 | /* | |
73 | * prom_init() is called very early on, before the kernel text | |
74 | * and data have been mapped to KERNELBASE. At this point the code | |
75 | * is running at whatever address it has been loaded at. | |
76 | * On ppc32 we compile with -mrelocatable, which means that references | |
77 | * to extern and static variables get relocated automatically. | |
78 | * On ppc64 we have to relocate the references explicitly with | |
79 | * RELOC. (Note that strings count as static variables.) | |
80 | * | |
81 | * Because OF may have mapped I/O devices into the area starting at | |
82 | * KERNELBASE, particularly on CHRP machines, we can't safely call | |
83 | * OF once the kernel has been mapped to KERNELBASE. Therefore all | |
84 | * OF calls must be done within prom_init(). | |
85 | * | |
86 | * ADDR is used in calls to call_prom. The 4th and following | |
87 | * arguments to call_prom should be 32-bit values. | |
88 | * On ppc64, 64 bit values are truncated to 32 bits (and | |
89 | * fortunately don't get interpreted as two arguments). | |
90 | */ | |
91 | #ifdef CONFIG_PPC64 | |
92 | #define RELOC(x) (*PTRRELOC(&(x))) | |
93 | #define ADDR(x) (u32) add_reloc_offset((unsigned long)(x)) | |
a23414be | 94 | #define OF_WORKAROUNDS 0 |
9b6b563c PM |
95 | #else |
96 | #define RELOC(x) (x) | |
97 | #define ADDR(x) (u32) (x) | |
a23414be PM |
98 | #define OF_WORKAROUNDS of_workarounds |
99 | int of_workarounds; | |
9b6b563c PM |
100 | #endif |
101 | ||
a23414be PM |
102 | #define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */ |
103 | #define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */ | |
104 | ||
9b6b563c PM |
105 | #define PROM_BUG() do { \ |
106 | prom_printf("kernel BUG at %s line 0x%x!\n", \ | |
107 | RELOC(__FILE__), __LINE__); \ | |
108 | __asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \ | |
109 | } while (0) | |
110 | ||
111 | #ifdef DEBUG_PROM | |
112 | #define prom_debug(x...) prom_printf(x) | |
113 | #else | |
114 | #define prom_debug(x...) | |
115 | #endif | |
116 | ||
9b6b563c PM |
117 | |
118 | typedef u32 prom_arg_t; | |
119 | ||
120 | struct prom_args { | |
121 | u32 service; | |
122 | u32 nargs; | |
123 | u32 nret; | |
124 | prom_arg_t args[10]; | |
125 | }; | |
126 | ||
127 | struct prom_t { | |
128 | ihandle root; | |
a23414be | 129 | phandle chosen; |
9b6b563c PM |
130 | int cpu; |
131 | ihandle stdout; | |
a575b807 | 132 | ihandle mmumap; |
a23414be | 133 | ihandle memory; |
9b6b563c PM |
134 | }; |
135 | ||
136 | struct mem_map_entry { | |
cbbcf340 KG |
137 | u64 base; |
138 | u64 size; | |
9b6b563c PM |
139 | }; |
140 | ||
141 | typedef u32 cell_t; | |
142 | ||
6e35d5da BH |
143 | extern void __start(unsigned long r3, unsigned long r4, unsigned long r5, |
144 | unsigned long r6, unsigned long r7, unsigned long r8, | |
145 | unsigned long r9); | |
9b6b563c PM |
146 | |
147 | #ifdef CONFIG_PPC64 | |
c4988820 | 148 | extern int enter_prom(struct prom_args *args, unsigned long entry); |
9b6b563c | 149 | #else |
c4988820 | 150 | static inline int enter_prom(struct prom_args *args, unsigned long entry) |
9b6b563c | 151 | { |
c4988820 | 152 | return ((int (*)(struct prom_args *))entry)(args); |
9b6b563c PM |
153 | } |
154 | #endif | |
155 | ||
156 | extern void copy_and_flush(unsigned long dest, unsigned long src, | |
157 | unsigned long size, unsigned long offset); | |
158 | ||
159 | /* prom structure */ | |
160 | static struct prom_t __initdata prom; | |
161 | ||
162 | static unsigned long prom_entry __initdata; | |
163 | ||
164 | #define PROM_SCRATCH_SIZE 256 | |
165 | ||
166 | static char __initdata of_stdout_device[256]; | |
167 | static char __initdata prom_scratch[PROM_SCRATCH_SIZE]; | |
168 | ||
169 | static unsigned long __initdata dt_header_start; | |
170 | static unsigned long __initdata dt_struct_start, dt_struct_end; | |
171 | static unsigned long __initdata dt_string_start, dt_string_end; | |
172 | ||
173 | static unsigned long __initdata prom_initrd_start, prom_initrd_end; | |
174 | ||
175 | #ifdef CONFIG_PPC64 | |
165785e5 JK |
176 | static int __initdata prom_iommu_force_on; |
177 | static int __initdata prom_iommu_off; | |
9b6b563c PM |
178 | static unsigned long __initdata prom_tce_alloc_start; |
179 | static unsigned long __initdata prom_tce_alloc_end; | |
180 | #endif | |
181 | ||
e8222502 BH |
182 | /* Platforms codes are now obsolete in the kernel. Now only used within this |
183 | * file and ultimately gone too. Feel free to change them if you need, they | |
184 | * are not shared with anything outside of this file anymore | |
185 | */ | |
186 | #define PLATFORM_PSERIES 0x0100 | |
187 | #define PLATFORM_PSERIES_LPAR 0x0101 | |
188 | #define PLATFORM_LPAR 0x0001 | |
189 | #define PLATFORM_POWERMAC 0x0400 | |
190 | #define PLATFORM_GENERIC 0x0500 | |
27f44888 | 191 | #define PLATFORM_OPAL 0x0600 |
e8222502 | 192 | |
9b6b563c PM |
193 | static int __initdata of_platform; |
194 | ||
195 | static char __initdata prom_cmd_line[COMMAND_LINE_SIZE]; | |
196 | ||
cf68787b BK |
197 | static unsigned long __initdata prom_memory_limit; |
198 | ||
9b6b563c PM |
199 | static unsigned long __initdata alloc_top; |
200 | static unsigned long __initdata alloc_top_high; | |
201 | static unsigned long __initdata alloc_bottom; | |
202 | static unsigned long __initdata rmo_top; | |
203 | static unsigned long __initdata ram_top; | |
204 | ||
205 | static struct mem_map_entry __initdata mem_reserve_map[MEM_RESERVE_MAP_SIZE]; | |
206 | static int __initdata mem_reserve_cnt; | |
207 | ||
208 | static cell_t __initdata regbuf[1024]; | |
209 | ||
210 | ||
9b6b563c PM |
211 | /* |
212 | * Error results ... some OF calls will return "-1" on error, some | |
213 | * will return 0, some will return either. To simplify, here are | |
214 | * macros to use with any ihandle or phandle return value to check if | |
215 | * it is valid | |
216 | */ | |
217 | ||
218 | #define PROM_ERROR (-1u) | |
219 | #define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR) | |
220 | #define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR) | |
221 | ||
222 | ||
223 | /* This is the one and *ONLY* place where we actually call open | |
224 | * firmware. | |
225 | */ | |
226 | ||
227 | static int __init call_prom(const char *service, int nargs, int nret, ...) | |
228 | { | |
229 | int i; | |
230 | struct prom_args args; | |
231 | va_list list; | |
232 | ||
233 | args.service = ADDR(service); | |
234 | args.nargs = nargs; | |
235 | args.nret = nret; | |
236 | ||
237 | va_start(list, nret); | |
238 | for (i = 0; i < nargs; i++) | |
239 | args.args[i] = va_arg(list, prom_arg_t); | |
240 | va_end(list); | |
241 | ||
242 | for (i = 0; i < nret; i++) | |
243 | args.args[nargs+i] = 0; | |
244 | ||
c4988820 PM |
245 | if (enter_prom(&args, RELOC(prom_entry)) < 0) |
246 | return PROM_ERROR; | |
9b6b563c PM |
247 | |
248 | return (nret > 0) ? args.args[nargs] : 0; | |
249 | } | |
250 | ||
251 | static int __init call_prom_ret(const char *service, int nargs, int nret, | |
252 | prom_arg_t *rets, ...) | |
253 | { | |
254 | int i; | |
255 | struct prom_args args; | |
256 | va_list list; | |
257 | ||
258 | args.service = ADDR(service); | |
259 | args.nargs = nargs; | |
260 | args.nret = nret; | |
261 | ||
262 | va_start(list, rets); | |
263 | for (i = 0; i < nargs; i++) | |
264 | args.args[i] = va_arg(list, prom_arg_t); | |
265 | va_end(list); | |
266 | ||
267 | for (i = 0; i < nret; i++) | |
ed1189b7 | 268 | args.args[nargs+i] = 0; |
9b6b563c | 269 | |
c4988820 PM |
270 | if (enter_prom(&args, RELOC(prom_entry)) < 0) |
271 | return PROM_ERROR; | |
9b6b563c PM |
272 | |
273 | if (rets != NULL) | |
274 | for (i = 1; i < nret; ++i) | |
c5200c90 | 275 | rets[i-1] = args.args[nargs+i]; |
9b6b563c PM |
276 | |
277 | return (nret > 0) ? args.args[nargs] : 0; | |
278 | } | |
279 | ||
280 | ||
9b6b563c PM |
281 | static void __init prom_print(const char *msg) |
282 | { | |
283 | const char *p, *q; | |
284 | struct prom_t *_prom = &RELOC(prom); | |
285 | ||
286 | if (_prom->stdout == 0) | |
287 | return; | |
288 | ||
289 | for (p = msg; *p != 0; p = q) { | |
290 | for (q = p; *q != 0 && *q != '\n'; ++q) | |
291 | ; | |
292 | if (q > p) | |
293 | call_prom("write", 3, 1, _prom->stdout, p, q - p); | |
294 | if (*q == 0) | |
295 | break; | |
296 | ++q; | |
297 | call_prom("write", 3, 1, _prom->stdout, ADDR("\r\n"), 2); | |
298 | } | |
299 | } | |
300 | ||
301 | ||
302 | static void __init prom_print_hex(unsigned long val) | |
303 | { | |
304 | int i, nibbles = sizeof(val)*2; | |
305 | char buf[sizeof(val)*2+1]; | |
306 | struct prom_t *_prom = &RELOC(prom); | |
307 | ||
308 | for (i = nibbles-1; i >= 0; i--) { | |
309 | buf[i] = (val & 0xf) + '0'; | |
310 | if (buf[i] > '9') | |
311 | buf[i] += ('a'-'0'-10); | |
312 | val >>= 4; | |
313 | } | |
314 | buf[nibbles] = '\0'; | |
315 | call_prom("write", 3, 1, _prom->stdout, buf, nibbles); | |
316 | } | |
317 | ||
2c48a7d6 MN |
318 | /* max number of decimal digits in an unsigned long */ |
319 | #define UL_DIGITS 21 | |
320 | static void __init prom_print_dec(unsigned long val) | |
321 | { | |
322 | int i, size; | |
323 | char buf[UL_DIGITS+1]; | |
324 | struct prom_t *_prom = &RELOC(prom); | |
325 | ||
326 | for (i = UL_DIGITS-1; i >= 0; i--) { | |
327 | buf[i] = (val % 10) + '0'; | |
328 | val = val/10; | |
329 | if (val == 0) | |
330 | break; | |
331 | } | |
332 | /* shift stuff down */ | |
333 | size = UL_DIGITS - i; | |
334 | call_prom("write", 3, 1, _prom->stdout, buf+i, size); | |
335 | } | |
9b6b563c PM |
336 | |
337 | static void __init prom_printf(const char *format, ...) | |
338 | { | |
339 | const char *p, *q, *s; | |
340 | va_list args; | |
341 | unsigned long v; | |
af277149 | 342 | long vs; |
9b6b563c PM |
343 | struct prom_t *_prom = &RELOC(prom); |
344 | ||
345 | va_start(args, format); | |
346 | #ifdef CONFIG_PPC64 | |
347 | format = PTRRELOC(format); | |
348 | #endif | |
349 | for (p = format; *p != 0; p = q) { | |
350 | for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q) | |
351 | ; | |
352 | if (q > p) | |
353 | call_prom("write", 3, 1, _prom->stdout, p, q - p); | |
354 | if (*q == 0) | |
355 | break; | |
356 | if (*q == '\n') { | |
357 | ++q; | |
358 | call_prom("write", 3, 1, _prom->stdout, | |
359 | ADDR("\r\n"), 2); | |
360 | continue; | |
361 | } | |
362 | ++q; | |
363 | if (*q == 0) | |
364 | break; | |
365 | switch (*q) { | |
366 | case 's': | |
367 | ++q; | |
368 | s = va_arg(args, const char *); | |
369 | prom_print(s); | |
370 | break; | |
371 | case 'x': | |
372 | ++q; | |
373 | v = va_arg(args, unsigned long); | |
374 | prom_print_hex(v); | |
375 | break; | |
af277149 BH |
376 | case 'd': |
377 | ++q; | |
378 | vs = va_arg(args, int); | |
379 | if (vs < 0) { | |
380 | prom_print(RELOC("-")); | |
381 | vs = -vs; | |
382 | } | |
383 | prom_print_dec(vs); | |
384 | break; | |
2c48a7d6 MN |
385 | case 'l': |
386 | ++q; | |
af277149 BH |
387 | if (*q == 0) |
388 | break; | |
389 | else if (*q == 'x') { | |
390 | ++q; | |
391 | v = va_arg(args, unsigned long); | |
392 | prom_print_hex(v); | |
393 | } else if (*q == 'u') { /* '%lu' */ | |
2c48a7d6 MN |
394 | ++q; |
395 | v = va_arg(args, unsigned long); | |
396 | prom_print_dec(v); | |
af277149 BH |
397 | } else if (*q == 'd') { /* %ld */ |
398 | ++q; | |
399 | vs = va_arg(args, long); | |
400 | if (vs < 0) { | |
401 | prom_print(RELOC("-")); | |
402 | vs = -vs; | |
403 | } | |
404 | prom_print_dec(vs); | |
2c48a7d6 MN |
405 | } |
406 | break; | |
9b6b563c PM |
407 | } |
408 | } | |
409 | } | |
410 | ||
411 | ||
a575b807 PM |
412 | static unsigned int __init prom_claim(unsigned long virt, unsigned long size, |
413 | unsigned long align) | |
414 | { | |
a575b807 PM |
415 | struct prom_t *_prom = &RELOC(prom); |
416 | ||
a23414be PM |
417 | if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) { |
418 | /* | |
419 | * Old OF requires we claim physical and virtual separately | |
420 | * and then map explicitly (assuming virtual mode) | |
421 | */ | |
422 | int ret; | |
423 | prom_arg_t result; | |
424 | ||
425 | ret = call_prom_ret("call-method", 5, 2, &result, | |
426 | ADDR("claim"), _prom->memory, | |
427 | align, size, virt); | |
428 | if (ret != 0 || result == -1) | |
429 | return -1; | |
430 | ret = call_prom_ret("call-method", 5, 2, &result, | |
431 | ADDR("claim"), _prom->mmumap, | |
432 | align, size, virt); | |
433 | if (ret != 0) { | |
434 | call_prom("call-method", 4, 1, ADDR("release"), | |
435 | _prom->memory, size, virt); | |
436 | return -1; | |
437 | } | |
438 | /* the 0x12 is M (coherence) + PP == read/write */ | |
a575b807 | 439 | call_prom("call-method", 6, 1, |
a23414be PM |
440 | ADDR("map"), _prom->mmumap, 0x12, size, virt, virt); |
441 | return virt; | |
442 | } | |
443 | return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size, | |
444 | (prom_arg_t)align); | |
a575b807 PM |
445 | } |
446 | ||
9b6b563c PM |
447 | static void __init __attribute__((noreturn)) prom_panic(const char *reason) |
448 | { | |
449 | #ifdef CONFIG_PPC64 | |
450 | reason = PTRRELOC(reason); | |
451 | #endif | |
452 | prom_print(reason); | |
add60ef3 OH |
453 | /* Do not call exit because it clears the screen on pmac |
454 | * it also causes some sort of double-fault on early pmacs */ | |
455 | if (RELOC(of_platform) == PLATFORM_POWERMAC) | |
456 | asm("trap\n"); | |
457 | ||
9b6b563c PM |
458 | /* ToDo: should put up an SRC here on p/iSeries */ |
459 | call_prom("exit", 0, 0); | |
460 | ||
461 | for (;;) /* should never get here */ | |
462 | ; | |
463 | } | |
464 | ||
465 | ||
466 | static int __init prom_next_node(phandle *nodep) | |
467 | { | |
468 | phandle node; | |
469 | ||
470 | if ((node = *nodep) != 0 | |
471 | && (*nodep = call_prom("child", 1, 1, node)) != 0) | |
472 | return 1; | |
473 | if ((*nodep = call_prom("peer", 1, 1, node)) != 0) | |
474 | return 1; | |
475 | for (;;) { | |
476 | if ((node = call_prom("parent", 1, 1, node)) == 0) | |
477 | return 0; | |
478 | if ((*nodep = call_prom("peer", 1, 1, node)) != 0) | |
479 | return 1; | |
480 | } | |
481 | } | |
482 | ||
21fe3301 | 483 | static int inline prom_getprop(phandle node, const char *pname, |
9b6b563c PM |
484 | void *value, size_t valuelen) |
485 | { | |
486 | return call_prom("getprop", 4, 1, node, ADDR(pname), | |
487 | (u32)(unsigned long) value, (u32) valuelen); | |
488 | } | |
489 | ||
21fe3301 | 490 | static int inline prom_getproplen(phandle node, const char *pname) |
9b6b563c PM |
491 | { |
492 | return call_prom("getproplen", 2, 1, node, ADDR(pname)); | |
493 | } | |
494 | ||
a23414be | 495 | static void add_string(char **str, const char *q) |
9b6b563c | 496 | { |
a23414be PM |
497 | char *p = *str; |
498 | ||
499 | while (*q) | |
500 | *p++ = *q++; | |
501 | *p++ = ' '; | |
502 | *str = p; | |
503 | } | |
504 | ||
505 | static char *tohex(unsigned int x) | |
506 | { | |
507 | static char digits[] = "0123456789abcdef"; | |
508 | static char result[9]; | |
509 | int i; | |
510 | ||
511 | result[8] = 0; | |
512 | i = 8; | |
513 | do { | |
514 | --i; | |
515 | result[i] = digits[x & 0xf]; | |
516 | x >>= 4; | |
517 | } while (x != 0 && i > 0); | |
518 | return &result[i]; | |
519 | } | |
520 | ||
521 | static int __init prom_setprop(phandle node, const char *nodename, | |
522 | const char *pname, void *value, size_t valuelen) | |
523 | { | |
524 | char cmd[256], *p; | |
525 | ||
526 | if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL)) | |
527 | return call_prom("setprop", 4, 1, node, ADDR(pname), | |
528 | (u32)(unsigned long) value, (u32) valuelen); | |
529 | ||
530 | /* gah... setprop doesn't work on longtrail, have to use interpret */ | |
531 | p = cmd; | |
532 | add_string(&p, "dev"); | |
533 | add_string(&p, nodename); | |
534 | add_string(&p, tohex((u32)(unsigned long) value)); | |
535 | add_string(&p, tohex(valuelen)); | |
536 | add_string(&p, tohex(ADDR(pname))); | |
537 | add_string(&p, tohex(strlen(RELOC(pname)))); | |
538 | add_string(&p, "property"); | |
539 | *p = 0; | |
540 | return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd); | |
9b6b563c PM |
541 | } |
542 | ||
cf68787b BK |
543 | /* We can't use the standard versions because of RELOC headaches. */ |
544 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ | |
545 | || ('a' <= (c) && (c) <= 'f') \ | |
546 | || ('A' <= (c) && (c) <= 'F')) | |
547 | ||
548 | #define isdigit(c) ('0' <= (c) && (c) <= '9') | |
549 | #define islower(c) ('a' <= (c) && (c) <= 'z') | |
550 | #define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c)) | |
551 | ||
552 | unsigned long prom_strtoul(const char *cp, const char **endp) | |
553 | { | |
554 | unsigned long result = 0, base = 10, value; | |
555 | ||
556 | if (*cp == '0') { | |
557 | base = 8; | |
558 | cp++; | |
559 | if (toupper(*cp) == 'X') { | |
560 | cp++; | |
561 | base = 16; | |
562 | } | |
563 | } | |
564 | ||
565 | while (isxdigit(*cp) && | |
566 | (value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) { | |
567 | result = result * base + value; | |
568 | cp++; | |
569 | } | |
570 | ||
571 | if (endp) | |
572 | *endp = cp; | |
573 | ||
574 | return result; | |
575 | } | |
576 | ||
577 | unsigned long prom_memparse(const char *ptr, const char **retptr) | |
578 | { | |
579 | unsigned long ret = prom_strtoul(ptr, retptr); | |
580 | int shift = 0; | |
581 | ||
582 | /* | |
583 | * We can't use a switch here because GCC *may* generate a | |
584 | * jump table which won't work, because we're not running at | |
585 | * the address we're linked at. | |
586 | */ | |
587 | if ('G' == **retptr || 'g' == **retptr) | |
588 | shift = 30; | |
589 | ||
590 | if ('M' == **retptr || 'm' == **retptr) | |
591 | shift = 20; | |
592 | ||
593 | if ('K' == **retptr || 'k' == **retptr) | |
594 | shift = 10; | |
595 | ||
596 | if (shift) { | |
597 | ret <<= shift; | |
598 | (*retptr)++; | |
599 | } | |
600 | ||
601 | return ret; | |
602 | } | |
603 | ||
9b6b563c PM |
604 | /* |
605 | * Early parsing of the command line passed to the kernel, used for | |
606 | * "mem=x" and the options that affect the iommu | |
607 | */ | |
608 | static void __init early_cmdline_parse(void) | |
609 | { | |
610 | struct prom_t *_prom = &RELOC(prom); | |
cc5d0189 | 611 | const char *opt; |
cf68787b | 612 | |
cc5d0189 | 613 | char *p; |
9b6b563c PM |
614 | int l = 0; |
615 | ||
616 | RELOC(prom_cmd_line[0]) = 0; | |
617 | p = RELOC(prom_cmd_line); | |
618 | if ((long)_prom->chosen > 0) | |
619 | l = prom_getprop(_prom->chosen, "bootargs", p, COMMAND_LINE_SIZE-1); | |
620 | #ifdef CONFIG_CMDLINE | |
0e4aa9c2 | 621 | if (l <= 0 || p[0] == '\0') /* dbl check */ |
9b6b563c PM |
622 | strlcpy(RELOC(prom_cmd_line), |
623 | RELOC(CONFIG_CMDLINE), sizeof(prom_cmd_line)); | |
624 | #endif /* CONFIG_CMDLINE */ | |
625 | prom_printf("command line: %s\n", RELOC(prom_cmd_line)); | |
626 | ||
627 | #ifdef CONFIG_PPC64 | |
628 | opt = strstr(RELOC(prom_cmd_line), RELOC("iommu=")); | |
629 | if (opt) { | |
630 | prom_printf("iommu opt is: %s\n", opt); | |
631 | opt += 6; | |
632 | while (*opt && *opt == ' ') | |
633 | opt++; | |
634 | if (!strncmp(opt, RELOC("off"), 3)) | |
165785e5 | 635 | RELOC(prom_iommu_off) = 1; |
9b6b563c | 636 | else if (!strncmp(opt, RELOC("force"), 5)) |
165785e5 | 637 | RELOC(prom_iommu_force_on) = 1; |
9b6b563c PM |
638 | } |
639 | #endif | |
cf68787b BK |
640 | opt = strstr(RELOC(prom_cmd_line), RELOC("mem=")); |
641 | if (opt) { | |
642 | opt += 4; | |
643 | RELOC(prom_memory_limit) = prom_memparse(opt, (const char **)&opt); | |
644 | #ifdef CONFIG_PPC64 | |
645 | /* Align to 16 MB == size of ppc64 large page */ | |
646 | RELOC(prom_memory_limit) = ALIGN(RELOC(prom_memory_limit), 0x1000000); | |
647 | #endif | |
648 | } | |
9b6b563c PM |
649 | } |
650 | ||
27f44888 | 651 | #if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) |
9b6b563c | 652 | /* |
f709bfac PM |
653 | * There are two methods for telling firmware what our capabilities are. |
654 | * Newer machines have an "ibm,client-architecture-support" method on the | |
655 | * root node. For older machines, we have to call the "process-elf-header" | |
656 | * method in the /packages/elf-loader node, passing it a fake 32-bit | |
657 | * ELF header containing a couple of PT_NOTE sections that contain | |
658 | * structures that contain various information. | |
9b6b563c | 659 | */ |
f709bfac PM |
660 | |
661 | /* | |
662 | * New method - extensible architecture description vector. | |
663 | * | |
664 | * Because the description vector contains a mix of byte and word | |
665 | * values, we declare it as an unsigned char array, and use this | |
666 | * macro to put word values in. | |
667 | */ | |
668 | #define W(x) ((x) >> 24) & 0xff, ((x) >> 16) & 0xff, \ | |
669 | ((x) >> 8) & 0xff, (x) & 0xff | |
670 | ||
671 | /* Option vector bits - generic bits in byte 1 */ | |
672 | #define OV_IGNORE 0x80 /* ignore this vector */ | |
673 | #define OV_CESSATION_POLICY 0x40 /* halt if unsupported option present*/ | |
674 | ||
675 | /* Option vector 1: processor architectures supported */ | |
676 | #define OV1_PPC_2_00 0x80 /* set if we support PowerPC 2.00 */ | |
677 | #define OV1_PPC_2_01 0x40 /* set if we support PowerPC 2.01 */ | |
678 | #define OV1_PPC_2_02 0x20 /* set if we support PowerPC 2.02 */ | |
679 | #define OV1_PPC_2_03 0x10 /* set if we support PowerPC 2.03 */ | |
680 | #define OV1_PPC_2_04 0x08 /* set if we support PowerPC 2.04 */ | |
681 | #define OV1_PPC_2_05 0x04 /* set if we support PowerPC 2.05 */ | |
0cb99013 | 682 | #define OV1_PPC_2_06 0x02 /* set if we support PowerPC 2.06 */ |
f709bfac PM |
683 | |
684 | /* Option vector 2: Open Firmware options supported */ | |
685 | #define OV2_REAL_MODE 0x20 /* set if we want OF in real mode */ | |
686 | ||
687 | /* Option vector 3: processor options supported */ | |
688 | #define OV3_FP 0x80 /* floating point */ | |
689 | #define OV3_VMX 0x40 /* VMX/Altivec */ | |
974a76f5 | 690 | #define OV3_DFP 0x20 /* decimal FP */ |
f709bfac PM |
691 | |
692 | /* Option vector 5: PAPR/OF options supported */ | |
693 | #define OV5_LPAR 0x80 /* logical partitioning supported */ | |
694 | #define OV5_SPLPAR 0x40 /* shared-processor LPAR supported */ | |
695 | /* ibm,dynamic-reconfiguration-memory property supported */ | |
696 | #define OV5_DRCONF_MEMORY 0x20 | |
697 | #define OV5_LARGE_PAGES 0x10 /* large pages supported */ | |
d8c391a5 | 698 | #define OV5_DONATE_DEDICATE_CPU 0x02 /* donate dedicated CPU support */ |
014dad90 ME |
699 | /* PCIe/MSI support. Without MSI full PCIe is not supported */ |
700 | #ifdef CONFIG_PCI_MSI | |
701 | #define OV5_MSI 0x01 /* PCIe/MSI support */ | |
702 | #else | |
703 | #define OV5_MSI 0x00 | |
704 | #endif /* CONFIG_PCI_MSI */ | |
8391e42a NF |
705 | #ifdef CONFIG_PPC_SMLPAR |
706 | #define OV5_CMO 0x80 /* Cooperative Memory Overcommitment */ | |
9ee820fa | 707 | #define OV5_XCMO 0x40 /* Page Coalescing */ |
8391e42a NF |
708 | #else |
709 | #define OV5_CMO 0x00 | |
9ee820fa | 710 | #define OV5_XCMO 0x00 |
8391e42a | 711 | #endif |
4b83c330 | 712 | #define OV5_TYPE1_AFFINITY 0x80 /* Type 1 NUMA affinity */ |
f709bfac | 713 | |
28bb9ee1 | 714 | /* Option Vector 6: IBM PAPR hints */ |
715 | #define OV6_LINUX 0x02 /* Linux is our OS */ | |
716 | ||
f709bfac PM |
717 | /* |
718 | * The architecture vector has an array of PVR mask/value pairs, | |
719 | * followed by # option vectors - 1, followed by the option vectors. | |
720 | */ | |
721 | static unsigned char ibm_architecture_vec[] = { | |
722 | W(0xfffe0000), W(0x003a0000), /* POWER5/POWER5+ */ | |
03054d51 | 723 | W(0xffff0000), W(0x003e0000), /* POWER6 */ |
e952e6c4 | 724 | W(0xffff0000), W(0x003f0000), /* POWER7 */ |
0cb99013 | 725 | W(0xffffffff), W(0x0f000003), /* all 2.06-compliant */ |
0efbc18a | 726 | W(0xffffffff), W(0x0f000002), /* all 2.05-compliant */ |
f709bfac | 727 | W(0xfffffffe), W(0x0f000001), /* all 2.04-compliant and earlier */ |
28bb9ee1 | 728 | 6 - 1, /* 6 option vectors */ |
f709bfac PM |
729 | |
730 | /* option vector 1: processor architectures supported */ | |
11e9ed43 | 731 | 3 - 2, /* length */ |
f709bfac PM |
732 | 0, /* don't ignore, don't halt */ |
733 | OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 | | |
0cb99013 | 734 | OV1_PPC_2_04 | OV1_PPC_2_05 | OV1_PPC_2_06, |
f709bfac PM |
735 | |
736 | /* option vector 2: Open Firmware options supported */ | |
11e9ed43 | 737 | 34 - 2, /* length */ |
f709bfac PM |
738 | OV2_REAL_MODE, |
739 | 0, 0, | |
740 | W(0xffffffff), /* real_base */ | |
741 | W(0xffffffff), /* real_size */ | |
742 | W(0xffffffff), /* virt_base */ | |
743 | W(0xffffffff), /* virt_size */ | |
744 | W(0xffffffff), /* load_base */ | |
856cc2f0 | 745 | W(64), /* 64MB min RMA */ |
f709bfac PM |
746 | W(0xffffffff), /* full client load */ |
747 | 0, /* min RMA percentage of total RAM */ | |
748 | 48, /* max log_2(hash table size) */ | |
749 | ||
750 | /* option vector 3: processor options supported */ | |
11e9ed43 | 751 | 3 - 2, /* length */ |
f709bfac | 752 | 0, /* don't ignore, don't halt */ |
974a76f5 | 753 | OV3_FP | OV3_VMX | OV3_DFP, |
f709bfac PM |
754 | |
755 | /* option vector 4: IBM PAPR implementation */ | |
11e9ed43 | 756 | 2 - 2, /* length */ |
f709bfac PM |
757 | 0, /* don't halt */ |
758 | ||
759 | /* option vector 5: PAPR/OF options */ | |
28bb9ee1 | 760 | 13 - 2, /* length */ |
f709bfac | 761 | 0, /* don't ignore, don't halt */ |
d8c391a5 JM |
762 | OV5_LPAR | OV5_SPLPAR | OV5_LARGE_PAGES | OV5_DRCONF_MEMORY | |
763 | OV5_DONATE_DEDICATE_CPU | OV5_MSI, | |
8391e42a | 764 | 0, |
9ee820fa | 765 | OV5_CMO | OV5_XCMO, |
4b83c330 | 766 | OV5_TYPE1_AFFINITY, |
28bb9ee1 | 767 | 0, |
768 | 0, | |
769 | 0, | |
efec959f BH |
770 | /* WARNING: The offset of the "number of cores" field below |
771 | * must match by the macro below. Update the definition if | |
772 | * the structure layout changes. | |
773 | */ | |
774 | #define IBM_ARCH_VEC_NRCORES_OFFSET 100 | |
775 | W(NR_CPUS), /* number of cores supported */ | |
28bb9ee1 | 776 | |
777 | /* option vector 6: IBM PAPR hints */ | |
778 | 4 - 2, /* length */ | |
779 | 0, | |
780 | 0, | |
781 | OV6_LINUX, | |
782 | ||
f709bfac PM |
783 | }; |
784 | ||
785 | /* Old method - ELF header with PT_NOTE sections */ | |
9b6b563c PM |
786 | static struct fake_elf { |
787 | Elf32_Ehdr elfhdr; | |
788 | Elf32_Phdr phdr[2]; | |
789 | struct chrpnote { | |
790 | u32 namesz; | |
791 | u32 descsz; | |
792 | u32 type; | |
793 | char name[8]; /* "PowerPC" */ | |
794 | struct chrpdesc { | |
795 | u32 real_mode; | |
796 | u32 real_base; | |
797 | u32 real_size; | |
798 | u32 virt_base; | |
799 | u32 virt_size; | |
800 | u32 load_base; | |
801 | } chrpdesc; | |
802 | } chrpnote; | |
803 | struct rpanote { | |
804 | u32 namesz; | |
805 | u32 descsz; | |
806 | u32 type; | |
807 | char name[24]; /* "IBM,RPA-Client-Config" */ | |
808 | struct rpadesc { | |
809 | u32 lpar_affinity; | |
810 | u32 min_rmo_size; | |
811 | u32 min_rmo_percent; | |
812 | u32 max_pft_size; | |
813 | u32 splpar; | |
814 | u32 min_load; | |
815 | u32 new_mem_def; | |
816 | u32 ignore_me; | |
817 | } rpadesc; | |
818 | } rpanote; | |
5663a123 | 819 | } fake_elf = { |
9b6b563c PM |
820 | .elfhdr = { |
821 | .e_ident = { 0x7f, 'E', 'L', 'F', | |
822 | ELFCLASS32, ELFDATA2MSB, EV_CURRENT }, | |
823 | .e_type = ET_EXEC, /* yeah right */ | |
824 | .e_machine = EM_PPC, | |
825 | .e_version = EV_CURRENT, | |
826 | .e_phoff = offsetof(struct fake_elf, phdr), | |
827 | .e_phentsize = sizeof(Elf32_Phdr), | |
828 | .e_phnum = 2 | |
829 | }, | |
830 | .phdr = { | |
831 | [0] = { | |
832 | .p_type = PT_NOTE, | |
833 | .p_offset = offsetof(struct fake_elf, chrpnote), | |
834 | .p_filesz = sizeof(struct chrpnote) | |
835 | }, [1] = { | |
836 | .p_type = PT_NOTE, | |
837 | .p_offset = offsetof(struct fake_elf, rpanote), | |
838 | .p_filesz = sizeof(struct rpanote) | |
839 | } | |
840 | }, | |
841 | .chrpnote = { | |
842 | .namesz = sizeof("PowerPC"), | |
843 | .descsz = sizeof(struct chrpdesc), | |
844 | .type = 0x1275, | |
845 | .name = "PowerPC", | |
846 | .chrpdesc = { | |
847 | .real_mode = ~0U, /* ~0 means "don't care" */ | |
848 | .real_base = ~0U, | |
849 | .real_size = ~0U, | |
850 | .virt_base = ~0U, | |
851 | .virt_size = ~0U, | |
852 | .load_base = ~0U | |
853 | }, | |
854 | }, | |
855 | .rpanote = { | |
856 | .namesz = sizeof("IBM,RPA-Client-Config"), | |
857 | .descsz = sizeof(struct rpadesc), | |
858 | .type = 0x12759999, | |
859 | .name = "IBM,RPA-Client-Config", | |
860 | .rpadesc = { | |
5663a123 PM |
861 | .lpar_affinity = 0, |
862 | .min_rmo_size = 64, /* in megabytes */ | |
9b6b563c | 863 | .min_rmo_percent = 0, |
5663a123 | 864 | .max_pft_size = 48, /* 2^48 bytes max PFT size */ |
9b6b563c PM |
865 | .splpar = 1, |
866 | .min_load = ~0U, | |
5663a123 | 867 | .new_mem_def = 0 |
9b6b563c PM |
868 | } |
869 | } | |
870 | }; | |
871 | ||
efec959f BH |
872 | static int __init prom_count_smt_threads(void) |
873 | { | |
874 | phandle node; | |
875 | char type[64]; | |
876 | unsigned int plen; | |
877 | ||
878 | /* Pick up th first CPU node we can find */ | |
879 | for (node = 0; prom_next_node(&node); ) { | |
880 | type[0] = 0; | |
881 | prom_getprop(node, "device_type", type, sizeof(type)); | |
882 | ||
883 | if (strcmp(type, RELOC("cpu"))) | |
884 | continue; | |
885 | /* | |
886 | * There is an entry for each smt thread, each entry being | |
887 | * 4 bytes long. All cpus should have the same number of | |
888 | * smt threads, so return after finding the first. | |
889 | */ | |
890 | plen = prom_getproplen(node, "ibm,ppc-interrupt-server#s"); | |
891 | if (plen == PROM_ERROR) | |
892 | break; | |
893 | plen >>= 2; | |
2c48a7d6 | 894 | prom_debug("Found %lu smt threads per core\n", (unsigned long)plen); |
efec959f BH |
895 | |
896 | /* Sanity check */ | |
897 | if (plen < 1 || plen > 64) { | |
2c48a7d6 | 898 | prom_printf("Threads per core %lu out of bounds, assuming 1\n", |
efec959f BH |
899 | (unsigned long)plen); |
900 | return 1; | |
901 | } | |
902 | return plen; | |
903 | } | |
904 | prom_debug("No threads found, assuming 1 per core\n"); | |
905 | ||
906 | return 1; | |
907 | ||
908 | } | |
909 | ||
910 | ||
9b6b563c PM |
911 | static void __init prom_send_capabilities(void) |
912 | { | |
f709bfac PM |
913 | ihandle elfloader, root; |
914 | prom_arg_t ret; | |
efec959f | 915 | u32 *cores; |
f709bfac PM |
916 | |
917 | root = call_prom("open", 1, 1, ADDR("/")); | |
918 | if (root != 0) { | |
efec959f BH |
919 | /* We need to tell the FW about the number of cores we support. |
920 | * | |
921 | * To do that, we count the number of threads on the first core | |
922 | * (we assume this is the same for all cores) and use it to | |
923 | * divide NR_CPUS. | |
924 | */ | |
925 | cores = (u32 *)PTRRELOC(&ibm_architecture_vec[IBM_ARCH_VEC_NRCORES_OFFSET]); | |
926 | if (*cores != NR_CPUS) { | |
927 | prom_printf("WARNING ! " | |
2c48a7d6 | 928 | "ibm_architecture_vec structure inconsistent: %lu!\n", |
efec959f BH |
929 | *cores); |
930 | } else { | |
33ad5e4b | 931 | *cores = DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads()); |
2c48a7d6 MN |
932 | prom_printf("Max number of cores passed to firmware: %lu (NR_CPUS = %lu)\n", |
933 | *cores, NR_CPUS); | |
efec959f BH |
934 | } |
935 | ||
f709bfac | 936 | /* try calling the ibm,client-architecture-support method */ |
049d0497 | 937 | prom_printf("Calling ibm,client-architecture-support..."); |
f709bfac PM |
938 | if (call_prom_ret("call-method", 3, 2, &ret, |
939 | ADDR("ibm,client-architecture-support"), | |
33b74977 | 940 | root, |
f709bfac PM |
941 | ADDR(ibm_architecture_vec)) == 0) { |
942 | /* the call exists... */ | |
943 | if (ret) | |
4da727ae | 944 | prom_printf("\nWARNING: ibm,client-architecture" |
f709bfac PM |
945 | "-support call FAILED!\n"); |
946 | call_prom("close", 1, 0, root); | |
4da727ae | 947 | prom_printf(" done\n"); |
f709bfac PM |
948 | return; |
949 | } | |
950 | call_prom("close", 1, 0, root); | |
049d0497 | 951 | prom_printf(" not implemented\n"); |
f709bfac | 952 | } |
9b6b563c | 953 | |
f709bfac | 954 | /* no ibm,client-architecture-support call, try the old way */ |
9b6b563c PM |
955 | elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader")); |
956 | if (elfloader == 0) { | |
957 | prom_printf("couldn't open /packages/elf-loader\n"); | |
958 | return; | |
959 | } | |
960 | call_prom("call-method", 3, 1, ADDR("process-elf-header"), | |
961 | elfloader, ADDR(&fake_elf)); | |
962 | call_prom("close", 1, 0, elfloader); | |
963 | } | |
964 | #endif | |
965 | ||
966 | /* | |
967 | * Memory allocation strategy... our layout is normally: | |
968 | * | |
969 | * at 14Mb or more we have vmlinux, then a gap and initrd. In some | |
970 | * rare cases, initrd might end up being before the kernel though. | |
971 | * We assume this won't override the final kernel at 0, we have no | |
972 | * provision to handle that in this version, but it should hopefully | |
973 | * never happen. | |
974 | * | |
975 | * alloc_top is set to the top of RMO, eventually shrink down if the | |
976 | * TCEs overlap | |
977 | * | |
978 | * alloc_bottom is set to the top of kernel/initrd | |
979 | * | |
980 | * from there, allocations are done this way : rtas is allocated | |
981 | * topmost, and the device-tree is allocated from the bottom. We try | |
982 | * to grow the device-tree allocation as we progress. If we can't, | |
983 | * then we fail, we don't currently have a facility to restart | |
984 | * elsewhere, but that shouldn't be necessary. | |
985 | * | |
986 | * Note that calls to reserve_mem have to be done explicitly, memory | |
987 | * allocated with either alloc_up or alloc_down isn't automatically | |
988 | * reserved. | |
989 | */ | |
990 | ||
991 | ||
992 | /* | |
993 | * Allocates memory in the RMO upward from the kernel/initrd | |
994 | * | |
995 | * When align is 0, this is a special case, it means to allocate in place | |
996 | * at the current location of alloc_bottom or fail (that is basically | |
997 | * extending the previous allocation). Used for the device-tree flattening | |
998 | */ | |
999 | static unsigned long __init alloc_up(unsigned long size, unsigned long align) | |
1000 | { | |
c4988820 | 1001 | unsigned long base = RELOC(alloc_bottom); |
9b6b563c PM |
1002 | unsigned long addr = 0; |
1003 | ||
c4988820 PM |
1004 | if (align) |
1005 | base = _ALIGN_UP(base, align); | |
9b6b563c PM |
1006 | prom_debug("alloc_up(%x, %x)\n", size, align); |
1007 | if (RELOC(ram_top) == 0) | |
1008 | prom_panic("alloc_up() called with mem not initialized\n"); | |
1009 | ||
1010 | if (align) | |
1011 | base = _ALIGN_UP(RELOC(alloc_bottom), align); | |
1012 | else | |
1013 | base = RELOC(alloc_bottom); | |
1014 | ||
1015 | for(; (base + size) <= RELOC(alloc_top); | |
1016 | base = _ALIGN_UP(base + 0x100000, align)) { | |
1017 | prom_debug(" trying: 0x%x\n\r", base); | |
1018 | addr = (unsigned long)prom_claim(base, size, 0); | |
c4988820 | 1019 | if (addr != PROM_ERROR && addr != 0) |
9b6b563c PM |
1020 | break; |
1021 | addr = 0; | |
1022 | if (align == 0) | |
1023 | break; | |
1024 | } | |
1025 | if (addr == 0) | |
1026 | return 0; | |
966728dd | 1027 | RELOC(alloc_bottom) = addr + size; |
9b6b563c PM |
1028 | |
1029 | prom_debug(" -> %x\n", addr); | |
1030 | prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom)); | |
1031 | prom_debug(" alloc_top : %x\n", RELOC(alloc_top)); | |
1032 | prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); | |
1033 | prom_debug(" rmo_top : %x\n", RELOC(rmo_top)); | |
1034 | prom_debug(" ram_top : %x\n", RELOC(ram_top)); | |
1035 | ||
1036 | return addr; | |
1037 | } | |
1038 | ||
1039 | /* | |
1040 | * Allocates memory downward, either from top of RMO, or if highmem | |
1041 | * is set, from the top of RAM. Note that this one doesn't handle | |
1042 | * failures. It does claim memory if highmem is not set. | |
1043 | */ | |
1044 | static unsigned long __init alloc_down(unsigned long size, unsigned long align, | |
1045 | int highmem) | |
1046 | { | |
1047 | unsigned long base, addr = 0; | |
1048 | ||
1049 | prom_debug("alloc_down(%x, %x, %s)\n", size, align, | |
1050 | highmem ? RELOC("(high)") : RELOC("(low)")); | |
1051 | if (RELOC(ram_top) == 0) | |
1052 | prom_panic("alloc_down() called with mem not initialized\n"); | |
1053 | ||
1054 | if (highmem) { | |
1055 | /* Carve out storage for the TCE table. */ | |
1056 | addr = _ALIGN_DOWN(RELOC(alloc_top_high) - size, align); | |
1057 | if (addr <= RELOC(alloc_bottom)) | |
1058 | return 0; | |
1059 | /* Will we bump into the RMO ? If yes, check out that we | |
1060 | * didn't overlap existing allocations there, if we did, | |
1061 | * we are dead, we must be the first in town ! | |
1062 | */ | |
1063 | if (addr < RELOC(rmo_top)) { | |
1064 | /* Good, we are first */ | |
1065 | if (RELOC(alloc_top) == RELOC(rmo_top)) | |
1066 | RELOC(alloc_top) = RELOC(rmo_top) = addr; | |
1067 | else | |
1068 | return 0; | |
1069 | } | |
1070 | RELOC(alloc_top_high) = addr; | |
1071 | goto bail; | |
1072 | } | |
1073 | ||
1074 | base = _ALIGN_DOWN(RELOC(alloc_top) - size, align); | |
1075 | for (; base > RELOC(alloc_bottom); | |
1076 | base = _ALIGN_DOWN(base - 0x100000, align)) { | |
1077 | prom_debug(" trying: 0x%x\n\r", base); | |
1078 | addr = (unsigned long)prom_claim(base, size, 0); | |
c4988820 | 1079 | if (addr != PROM_ERROR && addr != 0) |
9b6b563c PM |
1080 | break; |
1081 | addr = 0; | |
1082 | } | |
1083 | if (addr == 0) | |
1084 | return 0; | |
1085 | RELOC(alloc_top) = addr; | |
1086 | ||
1087 | bail: | |
1088 | prom_debug(" -> %x\n", addr); | |
1089 | prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom)); | |
1090 | prom_debug(" alloc_top : %x\n", RELOC(alloc_top)); | |
1091 | prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); | |
1092 | prom_debug(" rmo_top : %x\n", RELOC(rmo_top)); | |
1093 | prom_debug(" ram_top : %x\n", RELOC(ram_top)); | |
1094 | ||
1095 | return addr; | |
1096 | } | |
1097 | ||
1098 | /* | |
1099 | * Parse a "reg" cell | |
1100 | */ | |
1101 | static unsigned long __init prom_next_cell(int s, cell_t **cellp) | |
1102 | { | |
1103 | cell_t *p = *cellp; | |
1104 | unsigned long r = 0; | |
1105 | ||
1106 | /* Ignore more than 2 cells */ | |
1107 | while (s > sizeof(unsigned long) / 4) { | |
1108 | p++; | |
1109 | s--; | |
1110 | } | |
1111 | r = *p++; | |
1112 | #ifdef CONFIG_PPC64 | |
35499c01 | 1113 | if (s > 1) { |
9b6b563c PM |
1114 | r <<= 32; |
1115 | r |= *(p++); | |
1116 | } | |
1117 | #endif | |
1118 | *cellp = p; | |
1119 | return r; | |
1120 | } | |
1121 | ||
1122 | /* | |
1123 | * Very dumb function for adding to the memory reserve list, but | |
1124 | * we don't need anything smarter at this point | |
1125 | * | |
1126 | * XXX Eventually check for collisions. They should NEVER happen. | |
1127 | * If problems seem to show up, it would be a good start to track | |
1128 | * them down. | |
1129 | */ | |
0108d3fe | 1130 | static void __init reserve_mem(u64 base, u64 size) |
9b6b563c | 1131 | { |
cbbcf340 | 1132 | u64 top = base + size; |
9b6b563c PM |
1133 | unsigned long cnt = RELOC(mem_reserve_cnt); |
1134 | ||
1135 | if (size == 0) | |
1136 | return; | |
1137 | ||
1138 | /* We need to always keep one empty entry so that we | |
1139 | * have our terminator with "size" set to 0 since we are | |
1140 | * dumb and just copy this entire array to the boot params | |
1141 | */ | |
1142 | base = _ALIGN_DOWN(base, PAGE_SIZE); | |
1143 | top = _ALIGN_UP(top, PAGE_SIZE); | |
1144 | size = top - base; | |
1145 | ||
1146 | if (cnt >= (MEM_RESERVE_MAP_SIZE - 1)) | |
1147 | prom_panic("Memory reserve map exhausted !\n"); | |
1148 | RELOC(mem_reserve_map)[cnt].base = base; | |
1149 | RELOC(mem_reserve_map)[cnt].size = size; | |
1150 | RELOC(mem_reserve_cnt) = cnt + 1; | |
1151 | } | |
1152 | ||
1153 | /* | |
b3c2ffd5 | 1154 | * Initialize memory allocation mechanism, parse "memory" nodes and |
9b6b563c PM |
1155 | * obtain that way the top of memory and RMO to setup out local allocator |
1156 | */ | |
1157 | static void __init prom_init_mem(void) | |
1158 | { | |
1159 | phandle node; | |
1160 | char *path, type[64]; | |
1161 | unsigned int plen; | |
1162 | cell_t *p, *endp; | |
1163 | struct prom_t *_prom = &RELOC(prom); | |
1164 | u32 rac, rsc; | |
1165 | ||
1166 | /* | |
1167 | * We iterate the memory nodes to find | |
1168 | * 1) top of RMO (first node) | |
1169 | * 2) top of memory | |
1170 | */ | |
1171 | rac = 2; | |
1172 | prom_getprop(_prom->root, "#address-cells", &rac, sizeof(rac)); | |
1173 | rsc = 1; | |
1174 | prom_getprop(_prom->root, "#size-cells", &rsc, sizeof(rsc)); | |
1175 | prom_debug("root_addr_cells: %x\n", (unsigned long) rac); | |
1176 | prom_debug("root_size_cells: %x\n", (unsigned long) rsc); | |
1177 | ||
1178 | prom_debug("scanning memory:\n"); | |
1179 | path = RELOC(prom_scratch); | |
1180 | ||
1181 | for (node = 0; prom_next_node(&node); ) { | |
1182 | type[0] = 0; | |
1183 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1184 | ||
c4988820 PM |
1185 | if (type[0] == 0) { |
1186 | /* | |
1187 | * CHRP Longtrail machines have no device_type | |
1188 | * on the memory node, so check the name instead... | |
1189 | */ | |
1190 | prom_getprop(node, "name", type, sizeof(type)); | |
1191 | } | |
9b6b563c PM |
1192 | if (strcmp(type, RELOC("memory"))) |
1193 | continue; | |
c4988820 | 1194 | |
9b6b563c PM |
1195 | plen = prom_getprop(node, "reg", RELOC(regbuf), sizeof(regbuf)); |
1196 | if (plen > sizeof(regbuf)) { | |
1197 | prom_printf("memory node too large for buffer !\n"); | |
1198 | plen = sizeof(regbuf); | |
1199 | } | |
1200 | p = RELOC(regbuf); | |
1201 | endp = p + (plen / sizeof(cell_t)); | |
1202 | ||
1203 | #ifdef DEBUG_PROM | |
1204 | memset(path, 0, PROM_SCRATCH_SIZE); | |
1205 | call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); | |
1206 | prom_debug(" node %s :\n", path); | |
1207 | #endif /* DEBUG_PROM */ | |
1208 | ||
1209 | while ((endp - p) >= (rac + rsc)) { | |
1210 | unsigned long base, size; | |
1211 | ||
1212 | base = prom_next_cell(rac, &p); | |
1213 | size = prom_next_cell(rsc, &p); | |
1214 | ||
1215 | if (size == 0) | |
1216 | continue; | |
1217 | prom_debug(" %x %x\n", base, size); | |
ab1b55e2 | 1218 | if (base == 0 && (RELOC(of_platform) & PLATFORM_LPAR)) |
9b6b563c PM |
1219 | RELOC(rmo_top) = size; |
1220 | if ((base + size) > RELOC(ram_top)) | |
1221 | RELOC(ram_top) = base + size; | |
1222 | } | |
1223 | } | |
1224 | ||
1225 | RELOC(alloc_bottom) = PAGE_ALIGN((unsigned long)&RELOC(_end) + 0x4000); | |
1226 | ||
1227 | /* Check if we have an initrd after the kernel, if we do move our bottom | |
1228 | * point to after it | |
1229 | */ | |
1230 | if (RELOC(prom_initrd_start)) { | |
1231 | if (RELOC(prom_initrd_end) > RELOC(alloc_bottom)) | |
1232 | RELOC(alloc_bottom) = PAGE_ALIGN(RELOC(prom_initrd_end)); | |
1233 | } | |
1234 | ||
cf68787b BK |
1235 | /* |
1236 | * If prom_memory_limit is set we reduce the upper limits *except* for | |
1237 | * alloc_top_high. This must be the real top of RAM so we can put | |
1238 | * TCE's up there. | |
1239 | */ | |
1240 | ||
1241 | RELOC(alloc_top_high) = RELOC(ram_top); | |
1242 | ||
1243 | if (RELOC(prom_memory_limit)) { | |
1244 | if (RELOC(prom_memory_limit) <= RELOC(alloc_bottom)) { | |
1245 | prom_printf("Ignoring mem=%x <= alloc_bottom.\n", | |
1246 | RELOC(prom_memory_limit)); | |
1247 | RELOC(prom_memory_limit) = 0; | |
1248 | } else if (RELOC(prom_memory_limit) >= RELOC(ram_top)) { | |
1249 | prom_printf("Ignoring mem=%x >= ram_top.\n", | |
1250 | RELOC(prom_memory_limit)); | |
1251 | RELOC(prom_memory_limit) = 0; | |
1252 | } else { | |
1253 | RELOC(ram_top) = RELOC(prom_memory_limit); | |
1254 | RELOC(rmo_top) = min(RELOC(rmo_top), RELOC(prom_memory_limit)); | |
1255 | } | |
1256 | } | |
1257 | ||
9b6b563c PM |
1258 | /* |
1259 | * Setup our top alloc point, that is top of RMO or top of | |
1260 | * segment 0 when running non-LPAR. | |
1261 | * Some RS64 machines have buggy firmware where claims up at | |
1262 | * 1GB fail. Cap at 768MB as a workaround. | |
1263 | * Since 768MB is plenty of room, and we need to cap to something | |
1264 | * reasonable on 32-bit, cap at 768MB on all machines. | |
1265 | */ | |
1266 | if (!RELOC(rmo_top)) | |
1267 | RELOC(rmo_top) = RELOC(ram_top); | |
1268 | RELOC(rmo_top) = min(0x30000000ul, RELOC(rmo_top)); | |
1269 | RELOC(alloc_top) = RELOC(rmo_top); | |
2babf5c2 | 1270 | RELOC(alloc_top_high) = RELOC(ram_top); |
9b6b563c PM |
1271 | |
1272 | prom_printf("memory layout at init:\n"); | |
cf68787b | 1273 | prom_printf(" memory_limit : %x (16 MB aligned)\n", RELOC(prom_memory_limit)); |
9b6b563c PM |
1274 | prom_printf(" alloc_bottom : %x\n", RELOC(alloc_bottom)); |
1275 | prom_printf(" alloc_top : %x\n", RELOC(alloc_top)); | |
1276 | prom_printf(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); | |
1277 | prom_printf(" rmo_top : %x\n", RELOC(rmo_top)); | |
1278 | prom_printf(" ram_top : %x\n", RELOC(ram_top)); | |
1279 | } | |
1280 | ||
27f44888 BH |
1281 | static void __init prom_close_stdin(void) |
1282 | { | |
1283 | struct prom_t *_prom = &RELOC(prom); | |
1284 | ihandle val; | |
1285 | ||
1286 | if (prom_getprop(_prom->chosen, "stdin", &val, sizeof(val)) > 0) | |
1287 | call_prom("close", 1, 0, val); | |
1288 | } | |
1289 | ||
1290 | #ifdef CONFIG_PPC_POWERNV | |
1291 | ||
1292 | static u64 __initdata prom_opal_size; | |
1293 | static u64 __initdata prom_opal_align; | |
1294 | static int __initdata prom_rtas_start_cpu; | |
1295 | static u64 __initdata prom_rtas_data; | |
1296 | static u64 __initdata prom_rtas_entry; | |
1297 | ||
6e35d5da BH |
1298 | #ifdef CONFIG_PPC_EARLY_DEBUG_OPAL |
1299 | static u64 __initdata prom_opal_base; | |
1300 | static u64 __initdata prom_opal_entry; | |
1301 | #endif | |
1302 | ||
27f44888 BH |
1303 | /* XXX Don't change this structure without updating opal-takeover.S */ |
1304 | static struct opal_secondary_data { | |
1305 | s64 ack; /* 0 */ | |
1306 | u64 go; /* 8 */ | |
1307 | struct opal_takeover_args args; /* 16 */ | |
1308 | } opal_secondary_data; | |
1309 | ||
1310 | extern char opal_secondary_entry; | |
1311 | ||
1312 | static void prom_query_opal(void) | |
1313 | { | |
1314 | long rc; | |
1315 | ||
7680057c BH |
1316 | /* We must not query for OPAL presence on a machine that |
1317 | * supports TNK takeover (970 blades), as this uses the same | |
1318 | * h-call with different arguments and will crash | |
1319 | */ | |
1320 | if (PHANDLE_VALID(call_prom("finddevice", 1, 1, | |
1321 | ADDR("/tnk-memory-map")))) { | |
1322 | prom_printf("TNK takeover detected, skipping OPAL check\n"); | |
1323 | return; | |
1324 | } | |
1325 | ||
27f44888 BH |
1326 | prom_printf("Querying for OPAL presence... "); |
1327 | rc = opal_query_takeover(&RELOC(prom_opal_size), | |
1328 | &RELOC(prom_opal_align)); | |
1329 | prom_debug("(rc = %ld) ", rc); | |
1330 | if (rc != 0) { | |
1331 | prom_printf("not there.\n"); | |
1332 | return; | |
1333 | } | |
1334 | RELOC(of_platform) = PLATFORM_OPAL; | |
1335 | prom_printf(" there !\n"); | |
1336 | prom_debug(" opal_size = 0x%lx\n", RELOC(prom_opal_size)); | |
1337 | prom_debug(" opal_align = 0x%lx\n", RELOC(prom_opal_align)); | |
1338 | if (RELOC(prom_opal_align) < 0x10000) | |
1339 | RELOC(prom_opal_align) = 0x10000; | |
1340 | } | |
1341 | ||
1342 | static int prom_rtas_call(int token, int nargs, int nret, int *outputs, ...) | |
1343 | { | |
1344 | struct rtas_args rtas_args; | |
1345 | va_list list; | |
1346 | int i; | |
1347 | ||
1348 | rtas_args.token = token; | |
1349 | rtas_args.nargs = nargs; | |
1350 | rtas_args.nret = nret; | |
1351 | rtas_args.rets = (rtas_arg_t *)&(rtas_args.args[nargs]); | |
1352 | va_start(list, outputs); | |
1353 | for (i = 0; i < nargs; ++i) | |
1354 | rtas_args.args[i] = va_arg(list, rtas_arg_t); | |
1355 | va_end(list); | |
1356 | ||
1357 | for (i = 0; i < nret; ++i) | |
1358 | rtas_args.rets[i] = 0; | |
1359 | ||
1360 | opal_enter_rtas(&rtas_args, RELOC(prom_rtas_data), | |
1361 | RELOC(prom_rtas_entry)); | |
1362 | ||
1363 | if (nret > 1 && outputs != NULL) | |
1364 | for (i = 0; i < nret-1; ++i) | |
1365 | outputs[i] = rtas_args.rets[i+1]; | |
1366 | return (nret > 0)? rtas_args.rets[0]: 0; | |
1367 | } | |
1368 | ||
1369 | static void __init prom_opal_hold_cpus(void) | |
1370 | { | |
1371 | int i, cnt, cpu, rc; | |
1372 | long j; | |
1373 | phandle node; | |
1374 | char type[64]; | |
1375 | u32 servers[8]; | |
1376 | struct prom_t *_prom = &RELOC(prom); | |
1377 | void *entry = (unsigned long *)&RELOC(opal_secondary_entry); | |
1378 | struct opal_secondary_data *data = &RELOC(opal_secondary_data); | |
1379 | ||
1380 | prom_debug("prom_opal_hold_cpus: start...\n"); | |
1381 | prom_debug(" - entry = 0x%x\n", entry); | |
1382 | prom_debug(" - data = 0x%x\n", data); | |
1383 | ||
1384 | data->ack = -1; | |
1385 | data->go = 0; | |
1386 | ||
1387 | /* look for cpus */ | |
1388 | for (node = 0; prom_next_node(&node); ) { | |
1389 | type[0] = 0; | |
1390 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1391 | if (strcmp(type, RELOC("cpu")) != 0) | |
1392 | continue; | |
1393 | ||
1394 | /* Skip non-configured cpus. */ | |
1395 | if (prom_getprop(node, "status", type, sizeof(type)) > 0) | |
1396 | if (strcmp(type, RELOC("okay")) != 0) | |
1397 | continue; | |
1398 | ||
1399 | cnt = prom_getprop(node, "ibm,ppc-interrupt-server#s", servers, | |
1400 | sizeof(servers)); | |
1401 | if (cnt == PROM_ERROR) | |
1402 | break; | |
1403 | cnt >>= 2; | |
1404 | for (i = 0; i < cnt; i++) { | |
1405 | cpu = servers[i]; | |
1406 | prom_debug("CPU %d ... ", cpu); | |
1407 | if (cpu == _prom->cpu) { | |
1408 | prom_debug("booted !\n"); | |
1409 | continue; | |
1410 | } | |
1411 | prom_debug("starting ... "); | |
1412 | ||
1413 | /* Init the acknowledge var which will be reset by | |
1414 | * the secondary cpu when it awakens from its OF | |
1415 | * spinloop. | |
1416 | */ | |
1417 | data->ack = -1; | |
1418 | rc = prom_rtas_call(RELOC(prom_rtas_start_cpu), 3, 1, | |
1419 | NULL, cpu, entry, data); | |
1420 | prom_debug("rtas rc=%d ...", rc); | |
1421 | ||
1422 | for (j = 0; j < 100000000 && data->ack == -1; j++) { | |
1423 | HMT_low(); | |
1424 | mb(); | |
1425 | } | |
1426 | HMT_medium(); | |
1427 | if (data->ack != -1) | |
1428 | prom_debug("done, PIR=0x%x\n", data->ack); | |
1429 | else | |
1430 | prom_debug("timeout !\n"); | |
1431 | } | |
1432 | } | |
1433 | prom_debug("prom_opal_hold_cpus: end...\n"); | |
1434 | } | |
1435 | ||
1436 | static void prom_opal_takeover(void) | |
1437 | { | |
1438 | struct opal_secondary_data *data = &RELOC(opal_secondary_data); | |
1439 | struct opal_takeover_args *args = &data->args; | |
1440 | u64 align = RELOC(prom_opal_align); | |
1441 | u64 top_addr, opal_addr; | |
1442 | ||
1443 | args->k_image = (u64)RELOC(_stext); | |
1444 | args->k_size = _end - _stext; | |
1445 | args->k_entry = 0; | |
1446 | args->k_entry2 = 0x60; | |
1447 | ||
1448 | top_addr = _ALIGN_UP(args->k_size, align); | |
1449 | ||
1450 | if (RELOC(prom_initrd_start) != 0) { | |
1451 | args->rd_image = RELOC(prom_initrd_start); | |
1452 | args->rd_size = RELOC(prom_initrd_end) - args->rd_image; | |
1453 | args->rd_loc = top_addr; | |
1454 | top_addr = _ALIGN_UP(args->rd_loc + args->rd_size, align); | |
1455 | } | |
1456 | ||
1457 | /* Pickup an address for the HAL. We want to go really high | |
1458 | * up to avoid problem with future kexecs. On the other hand | |
1459 | * we don't want to be all over the TCEs on P5IOC2 machines | |
1460 | * which are going to be up there too. We assume the machine | |
1461 | * has plenty of memory, and we ask for the HAL for now to | |
1462 | * be just below the 1G point, or above the initrd | |
1463 | */ | |
1464 | opal_addr = _ALIGN_DOWN(0x40000000 - RELOC(prom_opal_size), align); | |
1465 | if (opal_addr < top_addr) | |
1466 | opal_addr = top_addr; | |
1467 | args->hal_addr = opal_addr; | |
1468 | ||
817c21ad BH |
1469 | /* Copy the command line to the kernel image */ |
1470 | strlcpy(RELOC(boot_command_line), RELOC(prom_cmd_line), | |
1471 | COMMAND_LINE_SIZE); | |
1472 | ||
27f44888 BH |
1473 | prom_debug(" k_image = 0x%lx\n", args->k_image); |
1474 | prom_debug(" k_size = 0x%lx\n", args->k_size); | |
1475 | prom_debug(" k_entry = 0x%lx\n", args->k_entry); | |
1476 | prom_debug(" k_entry2 = 0x%lx\n", args->k_entry2); | |
1477 | prom_debug(" hal_addr = 0x%lx\n", args->hal_addr); | |
1478 | prom_debug(" rd_image = 0x%lx\n", args->rd_image); | |
1479 | prom_debug(" rd_size = 0x%lx\n", args->rd_size); | |
1480 | prom_debug(" rd_loc = 0x%lx\n", args->rd_loc); | |
1481 | prom_printf("Performing OPAL takeover,this can take a few minutes..\n"); | |
1482 | prom_close_stdin(); | |
1483 | mb(); | |
1484 | data->go = 1; | |
1485 | for (;;) | |
1486 | opal_do_takeover(args); | |
1487 | } | |
6e35d5da BH |
1488 | |
1489 | /* | |
1490 | * Allocate room for and instantiate OPAL | |
1491 | */ | |
1492 | static void __init prom_instantiate_opal(void) | |
1493 | { | |
1494 | phandle opal_node; | |
1495 | ihandle opal_inst; | |
1496 | u64 base, entry; | |
1497 | u64 size = 0, align = 0x10000; | |
1498 | u32 rets[2]; | |
1499 | ||
1500 | prom_debug("prom_instantiate_opal: start...\n"); | |
1501 | ||
1502 | opal_node = call_prom("finddevice", 1, 1, ADDR("/ibm,opal")); | |
1503 | prom_debug("opal_node: %x\n", opal_node); | |
1504 | if (!PHANDLE_VALID(opal_node)) | |
1505 | return; | |
1506 | ||
1507 | prom_getprop(opal_node, "opal-runtime-size", &size, sizeof(size)); | |
1508 | if (size == 0) | |
1509 | return; | |
1510 | prom_getprop(opal_node, "opal-runtime-alignment", &align, | |
1511 | sizeof(align)); | |
1512 | ||
1513 | base = alloc_down(size, align, 0); | |
1514 | if (base == 0) { | |
1515 | prom_printf("OPAL allocation failed !\n"); | |
1516 | return; | |
1517 | } | |
1518 | ||
1519 | opal_inst = call_prom("open", 1, 1, ADDR("/ibm,opal")); | |
1520 | if (!IHANDLE_VALID(opal_inst)) { | |
1521 | prom_printf("opening opal package failed (%x)\n", opal_inst); | |
1522 | return; | |
1523 | } | |
1524 | ||
1525 | prom_printf("instantiating opal at 0x%x...", base); | |
1526 | ||
1527 | if (call_prom_ret("call-method", 4, 3, rets, | |
1528 | ADDR("load-opal-runtime"), | |
1529 | opal_inst, | |
1530 | base >> 32, base & 0xffffffff) != 0 | |
1531 | || (rets[0] == 0 && rets[1] == 0)) { | |
1532 | prom_printf(" failed\n"); | |
1533 | return; | |
1534 | } | |
1535 | entry = (((u64)rets[0]) << 32) | rets[1]; | |
1536 | ||
1537 | prom_printf(" done\n"); | |
1538 | ||
1539 | reserve_mem(base, size); | |
1540 | ||
1541 | prom_debug("opal base = 0x%x\n", base); | |
1542 | prom_debug("opal align = 0x%x\n", align); | |
1543 | prom_debug("opal entry = 0x%x\n", entry); | |
1544 | prom_debug("opal size = 0x%x\n", (long)size); | |
1545 | ||
1546 | prom_setprop(opal_node, "/ibm,opal", "opal-base-address", | |
1547 | &base, sizeof(base)); | |
1548 | prom_setprop(opal_node, "/ibm,opal", "opal-entry-address", | |
1549 | &entry, sizeof(entry)); | |
1550 | ||
1551 | #ifdef CONFIG_PPC_EARLY_DEBUG_OPAL | |
1552 | RELOC(prom_opal_base) = base; | |
1553 | RELOC(prom_opal_entry) = entry; | |
1554 | #endif | |
1555 | prom_debug("prom_instantiate_opal: end...\n"); | |
1556 | } | |
1557 | ||
27f44888 | 1558 | #endif /* CONFIG_PPC_POWERNV */ |
9b6b563c PM |
1559 | |
1560 | /* | |
1561 | * Allocate room for and instantiate RTAS | |
1562 | */ | |
1563 | static void __init prom_instantiate_rtas(void) | |
1564 | { | |
1565 | phandle rtas_node; | |
1566 | ihandle rtas_inst; | |
1567 | u32 base, entry = 0; | |
1568 | u32 size = 0; | |
1569 | ||
1570 | prom_debug("prom_instantiate_rtas: start...\n"); | |
1571 | ||
1572 | rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas")); | |
1573 | prom_debug("rtas_node: %x\n", rtas_node); | |
1574 | if (!PHANDLE_VALID(rtas_node)) | |
1575 | return; | |
1576 | ||
1577 | prom_getprop(rtas_node, "rtas-size", &size, sizeof(size)); | |
1578 | if (size == 0) | |
1579 | return; | |
1580 | ||
1581 | base = alloc_down(size, PAGE_SIZE, 0); | |
6d1e2c6c AB |
1582 | if (base == 0) |
1583 | prom_panic("Could not allocate memory for RTAS\n"); | |
9b6b563c PM |
1584 | |
1585 | rtas_inst = call_prom("open", 1, 1, ADDR("/rtas")); | |
1586 | if (!IHANDLE_VALID(rtas_inst)) { | |
a23414be | 1587 | prom_printf("opening rtas package failed (%x)\n", rtas_inst); |
9b6b563c PM |
1588 | return; |
1589 | } | |
1590 | ||
1f8737aa | 1591 | prom_printf("instantiating rtas at 0x%x...", base); |
9b6b563c PM |
1592 | |
1593 | if (call_prom_ret("call-method", 3, 2, &entry, | |
1594 | ADDR("instantiate-rtas"), | |
a23414be | 1595 | rtas_inst, base) != 0 |
9b6b563c PM |
1596 | || entry == 0) { |
1597 | prom_printf(" failed\n"); | |
1598 | return; | |
1599 | } | |
1600 | prom_printf(" done\n"); | |
1601 | ||
1602 | reserve_mem(base, size); | |
1603 | ||
a23414be PM |
1604 | prom_setprop(rtas_node, "/rtas", "linux,rtas-base", |
1605 | &base, sizeof(base)); | |
1606 | prom_setprop(rtas_node, "/rtas", "linux,rtas-entry", | |
1607 | &entry, sizeof(entry)); | |
9b6b563c | 1608 | |
27f44888 BH |
1609 | #ifdef CONFIG_PPC_POWERNV |
1610 | /* PowerVN takeover hack */ | |
1611 | RELOC(prom_rtas_data) = base; | |
1612 | RELOC(prom_rtas_entry) = entry; | |
1613 | prom_getprop(rtas_node, "start-cpu", &RELOC(prom_rtas_start_cpu), 4); | |
1614 | #endif | |
9b6b563c PM |
1615 | prom_debug("rtas base = 0x%x\n", base); |
1616 | prom_debug("rtas entry = 0x%x\n", entry); | |
1617 | prom_debug("rtas size = 0x%x\n", (long)size); | |
1618 | ||
1619 | prom_debug("prom_instantiate_rtas: end...\n"); | |
1620 | } | |
1621 | ||
1622 | #ifdef CONFIG_PPC64 | |
1623 | /* | |
1624 | * Allocate room for and initialize TCE tables | |
1625 | */ | |
1626 | static void __init prom_initialize_tce_table(void) | |
1627 | { | |
1628 | phandle node; | |
1629 | ihandle phb_node; | |
1630 | char compatible[64], type[64], model[64]; | |
1631 | char *path = RELOC(prom_scratch); | |
1632 | u64 base, align; | |
1633 | u32 minalign, minsize; | |
1634 | u64 tce_entry, *tce_entryp; | |
1635 | u64 local_alloc_top, local_alloc_bottom; | |
1636 | u64 i; | |
1637 | ||
165785e5 | 1638 | if (RELOC(prom_iommu_off)) |
9b6b563c PM |
1639 | return; |
1640 | ||
1641 | prom_debug("starting prom_initialize_tce_table\n"); | |
1642 | ||
1643 | /* Cache current top of allocs so we reserve a single block */ | |
1644 | local_alloc_top = RELOC(alloc_top_high); | |
1645 | local_alloc_bottom = local_alloc_top; | |
1646 | ||
1647 | /* Search all nodes looking for PHBs. */ | |
1648 | for (node = 0; prom_next_node(&node); ) { | |
1649 | compatible[0] = 0; | |
1650 | type[0] = 0; | |
1651 | model[0] = 0; | |
1652 | prom_getprop(node, "compatible", | |
1653 | compatible, sizeof(compatible)); | |
1654 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1655 | prom_getprop(node, "model", model, sizeof(model)); | |
1656 | ||
1657 | if ((type[0] == 0) || (strstr(type, RELOC("pci")) == NULL)) | |
1658 | continue; | |
1659 | ||
e788ff13 | 1660 | /* Keep the old logic intact to avoid regression. */ |
9b6b563c PM |
1661 | if (compatible[0] != 0) { |
1662 | if ((strstr(compatible, RELOC("python")) == NULL) && | |
1663 | (strstr(compatible, RELOC("Speedwagon")) == NULL) && | |
1664 | (strstr(compatible, RELOC("Winnipeg")) == NULL)) | |
1665 | continue; | |
1666 | } else if (model[0] != 0) { | |
1667 | if ((strstr(model, RELOC("ython")) == NULL) && | |
1668 | (strstr(model, RELOC("peedwagon")) == NULL) && | |
1669 | (strstr(model, RELOC("innipeg")) == NULL)) | |
1670 | continue; | |
1671 | } | |
1672 | ||
1673 | if (prom_getprop(node, "tce-table-minalign", &minalign, | |
1674 | sizeof(minalign)) == PROM_ERROR) | |
1675 | minalign = 0; | |
1676 | if (prom_getprop(node, "tce-table-minsize", &minsize, | |
1677 | sizeof(minsize)) == PROM_ERROR) | |
1678 | minsize = 4UL << 20; | |
1679 | ||
1680 | /* | |
1681 | * Even though we read what OF wants, we just set the table | |
1682 | * size to 4 MB. This is enough to map 2GB of PCI DMA space. | |
1683 | * By doing this, we avoid the pitfalls of trying to DMA to | |
1684 | * MMIO space and the DMA alias hole. | |
1685 | * | |
1686 | * On POWER4, firmware sets the TCE region by assuming | |
1687 | * each TCE table is 8MB. Using this memory for anything | |
1688 | * else will impact performance, so we always allocate 8MB. | |
1689 | * Anton | |
1690 | */ | |
1691 | if (__is_processor(PV_POWER4) || __is_processor(PV_POWER4p)) | |
1692 | minsize = 8UL << 20; | |
1693 | else | |
1694 | minsize = 4UL << 20; | |
1695 | ||
1696 | /* Align to the greater of the align or size */ | |
1697 | align = max(minalign, minsize); | |
1698 | base = alloc_down(minsize, align, 1); | |
1699 | if (base == 0) | |
1700 | prom_panic("ERROR, cannot find space for TCE table.\n"); | |
1701 | if (base < local_alloc_bottom) | |
1702 | local_alloc_bottom = base; | |
1703 | ||
9b6b563c | 1704 | /* It seems OF doesn't null-terminate the path :-( */ |
aca71ef8 | 1705 | memset(path, 0, PROM_SCRATCH_SIZE); |
9b6b563c PM |
1706 | /* Call OF to setup the TCE hardware */ |
1707 | if (call_prom("package-to-path", 3, 1, node, | |
1708 | path, PROM_SCRATCH_SIZE-1) == PROM_ERROR) { | |
1709 | prom_printf("package-to-path failed\n"); | |
1710 | } | |
1711 | ||
a23414be PM |
1712 | /* Save away the TCE table attributes for later use. */ |
1713 | prom_setprop(node, path, "linux,tce-base", &base, sizeof(base)); | |
1714 | prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize)); | |
1715 | ||
9b6b563c PM |
1716 | prom_debug("TCE table: %s\n", path); |
1717 | prom_debug("\tnode = 0x%x\n", node); | |
1718 | prom_debug("\tbase = 0x%x\n", base); | |
1719 | prom_debug("\tsize = 0x%x\n", minsize); | |
1720 | ||
1721 | /* Initialize the table to have a one-to-one mapping | |
1722 | * over the allocated size. | |
1723 | */ | |
2b931fb6 | 1724 | tce_entryp = (u64 *)base; |
9b6b563c PM |
1725 | for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) { |
1726 | tce_entry = (i << PAGE_SHIFT); | |
1727 | tce_entry |= 0x3; | |
1728 | *tce_entryp = tce_entry; | |
1729 | } | |
1730 | ||
1731 | prom_printf("opening PHB %s", path); | |
1732 | phb_node = call_prom("open", 1, 1, path); | |
1733 | if (phb_node == 0) | |
1734 | prom_printf("... failed\n"); | |
1735 | else | |
1736 | prom_printf("... done\n"); | |
1737 | ||
1738 | call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"), | |
1739 | phb_node, -1, minsize, | |
1740 | (u32) base, (u32) (base >> 32)); | |
1741 | call_prom("close", 1, 0, phb_node); | |
1742 | } | |
1743 | ||
1744 | reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom); | |
1745 | ||
2babf5c2 ME |
1746 | /* These are only really needed if there is a memory limit in |
1747 | * effect, but we don't know so export them always. */ | |
1748 | RELOC(prom_tce_alloc_start) = local_alloc_bottom; | |
1749 | RELOC(prom_tce_alloc_end) = local_alloc_top; | |
9b6b563c PM |
1750 | |
1751 | /* Flag the first invalid entry */ | |
1752 | prom_debug("ending prom_initialize_tce_table\n"); | |
1753 | } | |
1754 | #endif | |
1755 | ||
1756 | /* | |
1757 | * With CHRP SMP we need to use the OF to start the other processors. | |
1758 | * We can't wait until smp_boot_cpus (the OF is trashed by then) | |
1759 | * so we have to put the processors into a holding pattern controlled | |
1760 | * by the kernel (not OF) before we destroy the OF. | |
1761 | * | |
1762 | * This uses a chunk of low memory, puts some holding pattern | |
1763 | * code there and sends the other processors off to there until | |
1764 | * smp_boot_cpus tells them to do something. The holding pattern | |
1765 | * checks that address until its cpu # is there, when it is that | |
1766 | * cpu jumps to __secondary_start(). smp_boot_cpus() takes care | |
1767 | * of setting those values. | |
1768 | * | |
1769 | * We also use physical address 0x4 here to tell when a cpu | |
1770 | * is in its holding pattern code. | |
1771 | * | |
1772 | * -- Cort | |
1773 | */ | |
bbd0abda PM |
1774 | /* |
1775 | * We want to reference the copy of __secondary_hold_* in the | |
1776 | * 0 - 0x100 address range | |
1777 | */ | |
1778 | #define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff) | |
1779 | ||
9b6b563c PM |
1780 | static void __init prom_hold_cpus(void) |
1781 | { | |
9b6b563c PM |
1782 | unsigned long i; |
1783 | unsigned int reg; | |
1784 | phandle node; | |
1785 | char type[64]; | |
bbd0abda | 1786 | struct prom_t *_prom = &RELOC(prom); |
9b6b563c | 1787 | unsigned long *spinloop |
bbd0abda | 1788 | = (void *) LOW_ADDR(__secondary_hold_spinloop); |
9b6b563c | 1789 | unsigned long *acknowledge |
bbd0abda | 1790 | = (void *) LOW_ADDR(__secondary_hold_acknowledge); |
bbd0abda | 1791 | unsigned long secondary_hold = LOW_ADDR(__secondary_hold); |
9b6b563c PM |
1792 | |
1793 | prom_debug("prom_hold_cpus: start...\n"); | |
1794 | prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop); | |
1795 | prom_debug(" 1) *spinloop = 0x%x\n", *spinloop); | |
1796 | prom_debug(" 1) acknowledge = 0x%x\n", | |
1797 | (unsigned long)acknowledge); | |
1798 | prom_debug(" 1) *acknowledge = 0x%x\n", *acknowledge); | |
1799 | prom_debug(" 1) secondary_hold = 0x%x\n", secondary_hold); | |
1800 | ||
1801 | /* Set the common spinloop variable, so all of the secondary cpus | |
1802 | * will block when they are awakened from their OF spinloop. | |
1803 | * This must occur for both SMP and non SMP kernels, since OF will | |
1804 | * be trashed when we move the kernel. | |
1805 | */ | |
1806 | *spinloop = 0; | |
1807 | ||
9b6b563c PM |
1808 | /* look for cpus */ |
1809 | for (node = 0; prom_next_node(&node); ) { | |
1810 | type[0] = 0; | |
1811 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1812 | if (strcmp(type, RELOC("cpu")) != 0) | |
1813 | continue; | |
1814 | ||
1815 | /* Skip non-configured cpus. */ | |
1816 | if (prom_getprop(node, "status", type, sizeof(type)) > 0) | |
1817 | if (strcmp(type, RELOC("okay")) != 0) | |
1818 | continue; | |
1819 | ||
1820 | reg = -1; | |
1821 | prom_getprop(node, "reg", ®, sizeof(reg)); | |
1822 | ||
2c48a7d6 | 1823 | prom_debug("cpu hw idx = %lu\n", reg); |
9b6b563c PM |
1824 | |
1825 | /* Init the acknowledge var which will be reset by | |
1826 | * the secondary cpu when it awakens from its OF | |
1827 | * spinloop. | |
1828 | */ | |
1829 | *acknowledge = (unsigned long)-1; | |
1830 | ||
7d2f6075 | 1831 | if (reg != _prom->cpu) { |
27f44888 | 1832 | /* Primary Thread of non-boot cpu or any thread */ |
2c48a7d6 | 1833 | prom_printf("starting cpu hw idx %lu... ", reg); |
9b6b563c PM |
1834 | call_prom("start-cpu", 3, 0, node, |
1835 | secondary_hold, reg); | |
1836 | ||
bbd0abda PM |
1837 | for (i = 0; (i < 100000000) && |
1838 | (*acknowledge == ((unsigned long)-1)); i++ ) | |
9b6b563c PM |
1839 | mb(); |
1840 | ||
bbd0abda | 1841 | if (*acknowledge == reg) |
9b6b563c | 1842 | prom_printf("done\n"); |
bbd0abda | 1843 | else |
9b6b563c | 1844 | prom_printf("failed: %x\n", *acknowledge); |
9b6b563c PM |
1845 | } |
1846 | #ifdef CONFIG_SMP | |
1847 | else | |
2c48a7d6 | 1848 | prom_printf("boot cpu hw idx %lu\n", reg); |
9b6b563c | 1849 | #endif /* CONFIG_SMP */ |
9b6b563c | 1850 | } |
9b6b563c | 1851 | |
9b6b563c | 1852 | prom_debug("prom_hold_cpus: end...\n"); |
9b6b563c PM |
1853 | } |
1854 | ||
1855 | ||
1856 | static void __init prom_init_client_services(unsigned long pp) | |
1857 | { | |
1858 | struct prom_t *_prom = &RELOC(prom); | |
1859 | ||
1860 | /* Get a handle to the prom entry point before anything else */ | |
1861 | RELOC(prom_entry) = pp; | |
1862 | ||
1863 | /* get a handle for the stdout device */ | |
1864 | _prom->chosen = call_prom("finddevice", 1, 1, ADDR("/chosen")); | |
1865 | if (!PHANDLE_VALID(_prom->chosen)) | |
1866 | prom_panic("cannot find chosen"); /* msg won't be printed :( */ | |
1867 | ||
1868 | /* get device tree root */ | |
1869 | _prom->root = call_prom("finddevice", 1, 1, ADDR("/")); | |
1870 | if (!PHANDLE_VALID(_prom->root)) | |
1871 | prom_panic("cannot find device tree root"); /* msg won't be printed :( */ | |
a575b807 PM |
1872 | |
1873 | _prom->mmumap = 0; | |
1874 | } | |
1875 | ||
1876 | #ifdef CONFIG_PPC32 | |
1877 | /* | |
1878 | * For really old powermacs, we need to map things we claim. | |
1879 | * For that, we need the ihandle of the mmu. | |
a23414be | 1880 | * Also, on the longtrail, we need to work around other bugs. |
a575b807 PM |
1881 | */ |
1882 | static void __init prom_find_mmu(void) | |
1883 | { | |
1884 | struct prom_t *_prom = &RELOC(prom); | |
1885 | phandle oprom; | |
1886 | char version[64]; | |
1887 | ||
1888 | oprom = call_prom("finddevice", 1, 1, ADDR("/openprom")); | |
1889 | if (!PHANDLE_VALID(oprom)) | |
1890 | return; | |
1891 | if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0) | |
1892 | return; | |
1893 | version[sizeof(version) - 1] = 0; | |
a575b807 | 1894 | /* XXX might need to add other versions here */ |
a23414be PM |
1895 | if (strcmp(version, "Open Firmware, 1.0.5") == 0) |
1896 | of_workarounds = OF_WA_CLAIM; | |
1897 | else if (strncmp(version, "FirmWorks,3.", 12) == 0) { | |
1898 | of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL; | |
1899 | call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim"); | |
1900 | } else | |
a575b807 | 1901 | return; |
a23414be | 1902 | _prom->memory = call_prom("open", 1, 1, ADDR("/memory")); |
a575b807 PM |
1903 | prom_getprop(_prom->chosen, "mmu", &_prom->mmumap, |
1904 | sizeof(_prom->mmumap)); | |
a23414be PM |
1905 | if (!IHANDLE_VALID(_prom->memory) || !IHANDLE_VALID(_prom->mmumap)) |
1906 | of_workarounds &= ~OF_WA_CLAIM; /* hmmm */ | |
9b6b563c | 1907 | } |
a575b807 PM |
1908 | #else |
1909 | #define prom_find_mmu() | |
1910 | #endif | |
9b6b563c PM |
1911 | |
1912 | static void __init prom_init_stdout(void) | |
1913 | { | |
1914 | struct prom_t *_prom = &RELOC(prom); | |
1915 | char *path = RELOC(of_stdout_device); | |
1916 | char type[16]; | |
1917 | u32 val; | |
1918 | ||
1919 | if (prom_getprop(_prom->chosen, "stdout", &val, sizeof(val)) <= 0) | |
1920 | prom_panic("cannot find stdout"); | |
1921 | ||
1922 | _prom->stdout = val; | |
1923 | ||
1924 | /* Get the full OF pathname of the stdout device */ | |
1925 | memset(path, 0, 256); | |
1926 | call_prom("instance-to-path", 3, 1, _prom->stdout, path, 255); | |
1927 | val = call_prom("instance-to-package", 1, 1, _prom->stdout); | |
a23414be PM |
1928 | prom_setprop(_prom->chosen, "/chosen", "linux,stdout-package", |
1929 | &val, sizeof(val)); | |
9b6b563c | 1930 | prom_printf("OF stdout device is: %s\n", RELOC(of_stdout_device)); |
a23414be PM |
1931 | prom_setprop(_prom->chosen, "/chosen", "linux,stdout-path", |
1932 | path, strlen(path) + 1); | |
9b6b563c PM |
1933 | |
1934 | /* If it's a display, note it */ | |
1935 | memset(type, 0, sizeof(type)); | |
1936 | prom_getprop(val, "device_type", type, sizeof(type)); | |
1937 | if (strcmp(type, RELOC("display")) == 0) | |
a23414be | 1938 | prom_setprop(val, path, "linux,boot-display", NULL, 0); |
9b6b563c PM |
1939 | } |
1940 | ||
9b6b563c PM |
1941 | static int __init prom_find_machine_type(void) |
1942 | { | |
1943 | struct prom_t *_prom = &RELOC(prom); | |
1944 | char compat[256]; | |
1945 | int len, i = 0; | |
21fe3301 | 1946 | #ifdef CONFIG_PPC64 |
9b6b563c | 1947 | phandle rtas; |
e8222502 | 1948 | int x; |
21fe3301 | 1949 | #endif |
e8222502 | 1950 | |
6e35d5da | 1951 | /* Look for a PowerMac or a Cell */ |
9b6b563c PM |
1952 | len = prom_getprop(_prom->root, "compatible", |
1953 | compat, sizeof(compat)-1); | |
1954 | if (len > 0) { | |
1955 | compat[len] = 0; | |
1956 | while (i < len) { | |
1957 | char *p = &compat[i]; | |
1958 | int sl = strlen(p); | |
1959 | if (sl == 0) | |
1960 | break; | |
1961 | if (strstr(p, RELOC("Power Macintosh")) || | |
a575b807 | 1962 | strstr(p, RELOC("MacRISC"))) |
9b6b563c | 1963 | return PLATFORM_POWERMAC; |
133dda1e AB |
1964 | #ifdef CONFIG_PPC64 |
1965 | /* We must make sure we don't detect the IBM Cell | |
1966 | * blades as pSeries due to some firmware issues, | |
1967 | * so we do it here. | |
1968 | */ | |
1969 | if (strstr(p, RELOC("IBM,CBEA")) || | |
1970 | strstr(p, RELOC("IBM,CPBW-1.0"))) | |
1971 | return PLATFORM_GENERIC; | |
1972 | #endif /* CONFIG_PPC64 */ | |
9b6b563c PM |
1973 | i += sl + 1; |
1974 | } | |
1975 | } | |
1976 | #ifdef CONFIG_PPC64 | |
6e35d5da BH |
1977 | /* Try to detect OPAL */ |
1978 | if (PHANDLE_VALID(call_prom("finddevice", 1, 1, ADDR("/ibm,opal")))) | |
1979 | return PLATFORM_OPAL; | |
1980 | ||
1981 | /* Try to figure out if it's an IBM pSeries or any other | |
e8222502 BH |
1982 | * PAPR compliant platform. We assume it is if : |
1983 | * - /device_type is "chrp" (please, do NOT use that for future | |
1984 | * non-IBM designs ! | |
1985 | * - it has /rtas | |
1986 | */ | |
6f806cee | 1987 | len = prom_getprop(_prom->root, "device_type", |
e8222502 BH |
1988 | compat, sizeof(compat)-1); |
1989 | if (len <= 0) | |
1990 | return PLATFORM_GENERIC; | |
cb6b2eb9 | 1991 | if (strcmp(compat, RELOC("chrp"))) |
e8222502 BH |
1992 | return PLATFORM_GENERIC; |
1993 | ||
9b6b563c PM |
1994 | /* Default to pSeries. We need to know if we are running LPAR */ |
1995 | rtas = call_prom("finddevice", 1, 1, ADDR("/rtas")); | |
e8222502 BH |
1996 | if (!PHANDLE_VALID(rtas)) |
1997 | return PLATFORM_GENERIC; | |
1998 | x = prom_getproplen(rtas, "ibm,hypertas-functions"); | |
1999 | if (x != PROM_ERROR) { | |
4da727ae | 2000 | prom_debug("Hypertas detected, assuming LPAR !\n"); |
e8222502 | 2001 | return PLATFORM_PSERIES_LPAR; |
9b6b563c PM |
2002 | } |
2003 | return PLATFORM_PSERIES; | |
2004 | #else | |
e8222502 | 2005 | return PLATFORM_GENERIC; |
9b6b563c PM |
2006 | #endif |
2007 | } | |
2008 | ||
9b6b563c PM |
2009 | static int __init prom_set_color(ihandle ih, int i, int r, int g, int b) |
2010 | { | |
2011 | return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r); | |
2012 | } | |
2013 | ||
2014 | /* | |
2015 | * If we have a display that we don't know how to drive, | |
2016 | * we will want to try to execute OF's open method for it | |
2017 | * later. However, OF will probably fall over if we do that | |
2018 | * we've taken over the MMU. | |
2019 | * So we check whether we will need to open the display, | |
2020 | * and if so, open it now. | |
2021 | */ | |
2022 | static void __init prom_check_displays(void) | |
2023 | { | |
2024 | char type[16], *path; | |
2025 | phandle node; | |
2026 | ihandle ih; | |
2027 | int i; | |
9b6b563c PM |
2028 | |
2029 | static unsigned char default_colors[] = { | |
2030 | 0x00, 0x00, 0x00, | |
2031 | 0x00, 0x00, 0xaa, | |
2032 | 0x00, 0xaa, 0x00, | |
2033 | 0x00, 0xaa, 0xaa, | |
2034 | 0xaa, 0x00, 0x00, | |
2035 | 0xaa, 0x00, 0xaa, | |
2036 | 0xaa, 0xaa, 0x00, | |
2037 | 0xaa, 0xaa, 0xaa, | |
2038 | 0x55, 0x55, 0x55, | |
2039 | 0x55, 0x55, 0xff, | |
2040 | 0x55, 0xff, 0x55, | |
2041 | 0x55, 0xff, 0xff, | |
2042 | 0xff, 0x55, 0x55, | |
2043 | 0xff, 0x55, 0xff, | |
2044 | 0xff, 0xff, 0x55, | |
2045 | 0xff, 0xff, 0xff | |
2046 | }; | |
2047 | const unsigned char *clut; | |
2048 | ||
4da727ae | 2049 | prom_debug("Looking for displays\n"); |
9b6b563c PM |
2050 | for (node = 0; prom_next_node(&node); ) { |
2051 | memset(type, 0, sizeof(type)); | |
2052 | prom_getprop(node, "device_type", type, sizeof(type)); | |
2053 | if (strcmp(type, RELOC("display")) != 0) | |
2054 | continue; | |
2055 | ||
2056 | /* It seems OF doesn't null-terminate the path :-( */ | |
2057 | path = RELOC(prom_scratch); | |
2058 | memset(path, 0, PROM_SCRATCH_SIZE); | |
2059 | ||
2060 | /* | |
2061 | * leave some room at the end of the path for appending extra | |
2062 | * arguments | |
2063 | */ | |
2064 | if (call_prom("package-to-path", 3, 1, node, path, | |
2065 | PROM_SCRATCH_SIZE-10) == PROM_ERROR) | |
2066 | continue; | |
1f8737aa | 2067 | prom_printf("found display : %s, opening... ", path); |
9b6b563c PM |
2068 | |
2069 | ih = call_prom("open", 1, 1, path); | |
2070 | if (ih == 0) { | |
2071 | prom_printf("failed\n"); | |
2072 | continue; | |
2073 | } | |
2074 | ||
2075 | /* Success */ | |
2076 | prom_printf("done\n"); | |
a23414be | 2077 | prom_setprop(node, path, "linux,opened", NULL, 0); |
9b6b563c PM |
2078 | |
2079 | /* Setup a usable color table when the appropriate | |
2080 | * method is available. Should update this to set-colors */ | |
2081 | clut = RELOC(default_colors); | |
2082 | for (i = 0; i < 32; i++, clut += 3) | |
2083 | if (prom_set_color(ih, i, clut[0], clut[1], | |
2084 | clut[2]) != 0) | |
2085 | break; | |
2086 | ||
2087 | #ifdef CONFIG_LOGO_LINUX_CLUT224 | |
2088 | clut = PTRRELOC(RELOC(logo_linux_clut224.clut)); | |
2089 | for (i = 0; i < RELOC(logo_linux_clut224.clutsize); i++, clut += 3) | |
2090 | if (prom_set_color(ih, i + 32, clut[0], clut[1], | |
2091 | clut[2]) != 0) | |
2092 | break; | |
2093 | #endif /* CONFIG_LOGO_LINUX_CLUT224 */ | |
9b6b563c PM |
2094 | } |
2095 | } | |
2096 | ||
2097 | ||
2098 | /* Return (relocated) pointer to this much memory: moves initrd if reqd. */ | |
2099 | static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end, | |
2100 | unsigned long needed, unsigned long align) | |
2101 | { | |
2102 | void *ret; | |
2103 | ||
2104 | *mem_start = _ALIGN(*mem_start, align); | |
2105 | while ((*mem_start + needed) > *mem_end) { | |
2106 | unsigned long room, chunk; | |
2107 | ||
2108 | prom_debug("Chunk exhausted, claiming more at %x...\n", | |
2109 | RELOC(alloc_bottom)); | |
2110 | room = RELOC(alloc_top) - RELOC(alloc_bottom); | |
2111 | if (room > DEVTREE_CHUNK_SIZE) | |
2112 | room = DEVTREE_CHUNK_SIZE; | |
2113 | if (room < PAGE_SIZE) | |
fbafd728 AB |
2114 | prom_panic("No memory for flatten_device_tree " |
2115 | "(no room)\n"); | |
9b6b563c PM |
2116 | chunk = alloc_up(room, 0); |
2117 | if (chunk == 0) | |
fbafd728 AB |
2118 | prom_panic("No memory for flatten_device_tree " |
2119 | "(claim failed)\n"); | |
966728dd | 2120 | *mem_end = chunk + room; |
9b6b563c PM |
2121 | } |
2122 | ||
2123 | ret = (void *)*mem_start; | |
2124 | *mem_start += needed; | |
2125 | ||
2126 | return ret; | |
2127 | } | |
2128 | ||
2129 | #define dt_push_token(token, mem_start, mem_end) \ | |
2130 | do { *((u32 *)make_room(mem_start, mem_end, 4, 4)) = token; } while(0) | |
2131 | ||
2132 | static unsigned long __init dt_find_string(char *str) | |
2133 | { | |
2134 | char *s, *os; | |
2135 | ||
2136 | s = os = (char *)RELOC(dt_string_start); | |
2137 | s += 4; | |
2138 | while (s < (char *)RELOC(dt_string_end)) { | |
2139 | if (strcmp(s, str) == 0) | |
2140 | return s - os; | |
2141 | s += strlen(s) + 1; | |
2142 | } | |
2143 | return 0; | |
2144 | } | |
2145 | ||
2146 | /* | |
2147 | * The Open Firmware 1275 specification states properties must be 31 bytes or | |
2148 | * less, however not all firmwares obey this. Make it 64 bytes to be safe. | |
2149 | */ | |
2150 | #define MAX_PROPERTY_NAME 64 | |
2151 | ||
2152 | static void __init scan_dt_build_strings(phandle node, | |
2153 | unsigned long *mem_start, | |
2154 | unsigned long *mem_end) | |
2155 | { | |
2156 | char *prev_name, *namep, *sstart; | |
2157 | unsigned long soff; | |
2158 | phandle child; | |
2159 | ||
2160 | sstart = (char *)RELOC(dt_string_start); | |
2161 | ||
2162 | /* get and store all property names */ | |
2163 | prev_name = RELOC(""); | |
2164 | for (;;) { | |
2165 | /* 64 is max len of name including nul. */ | |
2166 | namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1); | |
2167 | if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) { | |
2168 | /* No more nodes: unwind alloc */ | |
2169 | *mem_start = (unsigned long)namep; | |
2170 | break; | |
2171 | } | |
2172 | ||
2173 | /* skip "name" */ | |
2174 | if (strcmp(namep, RELOC("name")) == 0) { | |
2175 | *mem_start = (unsigned long)namep; | |
2176 | prev_name = RELOC("name"); | |
2177 | continue; | |
2178 | } | |
2179 | /* get/create string entry */ | |
2180 | soff = dt_find_string(namep); | |
2181 | if (soff != 0) { | |
2182 | *mem_start = (unsigned long)namep; | |
2183 | namep = sstart + soff; | |
2184 | } else { | |
2185 | /* Trim off some if we can */ | |
2186 | *mem_start = (unsigned long)namep + strlen(namep) + 1; | |
2187 | RELOC(dt_string_end) = *mem_start; | |
2188 | } | |
2189 | prev_name = namep; | |
2190 | } | |
2191 | ||
2192 | /* do all our children */ | |
2193 | child = call_prom("child", 1, 1, node); | |
2194 | while (child != 0) { | |
2195 | scan_dt_build_strings(child, mem_start, mem_end); | |
2196 | child = call_prom("peer", 1, 1, child); | |
2197 | } | |
2198 | } | |
2199 | ||
2200 | static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start, | |
2201 | unsigned long *mem_end) | |
2202 | { | |
2203 | phandle child; | |
2204 | char *namep, *prev_name, *sstart, *p, *ep, *lp, *path; | |
2205 | unsigned long soff; | |
2206 | unsigned char *valp; | |
2207 | static char pname[MAX_PROPERTY_NAME]; | |
6e35d5da | 2208 | int l, room, has_phandle = 0; |
9b6b563c PM |
2209 | |
2210 | dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end); | |
2211 | ||
2212 | /* get the node's full name */ | |
2213 | namep = (char *)*mem_start; | |
c4988820 PM |
2214 | room = *mem_end - *mem_start; |
2215 | if (room > 255) | |
2216 | room = 255; | |
2217 | l = call_prom("package-to-path", 3, 1, node, namep, room); | |
9b6b563c PM |
2218 | if (l >= 0) { |
2219 | /* Didn't fit? Get more room. */ | |
c4988820 PM |
2220 | if (l >= room) { |
2221 | if (l >= *mem_end - *mem_start) | |
2222 | namep = make_room(mem_start, mem_end, l+1, 1); | |
9b6b563c PM |
2223 | call_prom("package-to-path", 3, 1, node, namep, l); |
2224 | } | |
2225 | namep[l] = '\0'; | |
2226 | ||
2227 | /* Fixup an Apple bug where they have bogus \0 chars in the | |
a575b807 PM |
2228 | * middle of the path in some properties, and extract |
2229 | * the unit name (everything after the last '/'). | |
9b6b563c | 2230 | */ |
a575b807 | 2231 | for (lp = p = namep, ep = namep + l; p < ep; p++) { |
9b6b563c | 2232 | if (*p == '/') |
a575b807 PM |
2233 | lp = namep; |
2234 | else if (*p != 0) | |
2235 | *lp++ = *p; | |
2236 | } | |
2237 | *lp = 0; | |
2238 | *mem_start = _ALIGN((unsigned long)lp + 1, 4); | |
9b6b563c PM |
2239 | } |
2240 | ||
2241 | /* get it again for debugging */ | |
2242 | path = RELOC(prom_scratch); | |
2243 | memset(path, 0, PROM_SCRATCH_SIZE); | |
2244 | call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); | |
2245 | ||
2246 | /* get and store all properties */ | |
2247 | prev_name = RELOC(""); | |
2248 | sstart = (char *)RELOC(dt_string_start); | |
2249 | for (;;) { | |
2250 | if (call_prom("nextprop", 3, 1, node, prev_name, | |
2251 | RELOC(pname)) != 1) | |
2252 | break; | |
2253 | ||
2254 | /* skip "name" */ | |
2255 | if (strcmp(RELOC(pname), RELOC("name")) == 0) { | |
2256 | prev_name = RELOC("name"); | |
2257 | continue; | |
2258 | } | |
2259 | ||
2260 | /* find string offset */ | |
2261 | soff = dt_find_string(RELOC(pname)); | |
2262 | if (soff == 0) { | |
2263 | prom_printf("WARNING: Can't find string index for" | |
2264 | " <%s>, node %s\n", RELOC(pname), path); | |
2265 | break; | |
2266 | } | |
2267 | prev_name = sstart + soff; | |
2268 | ||
2269 | /* get length */ | |
2270 | l = call_prom("getproplen", 2, 1, node, RELOC(pname)); | |
2271 | ||
2272 | /* sanity checks */ | |
2273 | if (l == PROM_ERROR) | |
2274 | continue; | |
2275 | if (l > MAX_PROPERTY_LENGTH) { | |
2276 | prom_printf("WARNING: ignoring large property "); | |
2277 | /* It seems OF doesn't null-terminate the path :-( */ | |
2278 | prom_printf("[%s] ", path); | |
2279 | prom_printf("%s length 0x%x\n", RELOC(pname), l); | |
2280 | continue; | |
2281 | } | |
2282 | ||
2283 | /* push property head */ | |
2284 | dt_push_token(OF_DT_PROP, mem_start, mem_end); | |
2285 | dt_push_token(l, mem_start, mem_end); | |
2286 | dt_push_token(soff, mem_start, mem_end); | |
2287 | ||
2288 | /* push property content */ | |
2289 | valp = make_room(mem_start, mem_end, l, 4); | |
2290 | call_prom("getprop", 4, 1, node, RELOC(pname), valp, l); | |
2291 | *mem_start = _ALIGN(*mem_start, 4); | |
6e35d5da BH |
2292 | |
2293 | if (!strcmp(RELOC(pname), RELOC("phandle"))) | |
2294 | has_phandle = 1; | |
9b6b563c PM |
2295 | } |
2296 | ||
6e35d5da BH |
2297 | /* Add a "linux,phandle" property if no "phandle" property already |
2298 | * existed (can happen with OPAL) | |
2299 | */ | |
2300 | if (!has_phandle) { | |
2301 | soff = dt_find_string(RELOC("linux,phandle")); | |
2302 | if (soff == 0) | |
2303 | prom_printf("WARNING: Can't find string index for" | |
2304 | " <linux-phandle> node %s\n", path); | |
2305 | else { | |
2306 | dt_push_token(OF_DT_PROP, mem_start, mem_end); | |
2307 | dt_push_token(4, mem_start, mem_end); | |
2308 | dt_push_token(soff, mem_start, mem_end); | |
2309 | valp = make_room(mem_start, mem_end, 4, 4); | |
2310 | *(u32 *)valp = node; | |
2311 | } | |
9b6b563c PM |
2312 | } |
2313 | ||
2314 | /* do all our children */ | |
2315 | child = call_prom("child", 1, 1, node); | |
2316 | while (child != 0) { | |
2317 | scan_dt_build_struct(child, mem_start, mem_end); | |
2318 | child = call_prom("peer", 1, 1, child); | |
2319 | } | |
2320 | ||
2321 | dt_push_token(OF_DT_END_NODE, mem_start, mem_end); | |
2322 | } | |
2323 | ||
2324 | static void __init flatten_device_tree(void) | |
2325 | { | |
2326 | phandle root; | |
2327 | unsigned long mem_start, mem_end, room; | |
2328 | struct boot_param_header *hdr; | |
2329 | struct prom_t *_prom = &RELOC(prom); | |
2330 | char *namep; | |
2331 | u64 *rsvmap; | |
2332 | ||
2333 | /* | |
2334 | * Check how much room we have between alloc top & bottom (+/- a | |
fbafd728 | 2335 | * few pages), crop to 1MB, as this is our "chunk" size |
9b6b563c PM |
2336 | */ |
2337 | room = RELOC(alloc_top) - RELOC(alloc_bottom) - 0x4000; | |
2338 | if (room > DEVTREE_CHUNK_SIZE) | |
2339 | room = DEVTREE_CHUNK_SIZE; | |
2340 | prom_debug("starting device tree allocs at %x\n", RELOC(alloc_bottom)); | |
2341 | ||
2342 | /* Now try to claim that */ | |
2343 | mem_start = (unsigned long)alloc_up(room, PAGE_SIZE); | |
2344 | if (mem_start == 0) | |
2345 | prom_panic("Can't allocate initial device-tree chunk\n"); | |
966728dd | 2346 | mem_end = mem_start + room; |
9b6b563c PM |
2347 | |
2348 | /* Get root of tree */ | |
2349 | root = call_prom("peer", 1, 1, (phandle)0); | |
2350 | if (root == (phandle)0) | |
2351 | prom_panic ("couldn't get device tree root\n"); | |
2352 | ||
2353 | /* Build header and make room for mem rsv map */ | |
2354 | mem_start = _ALIGN(mem_start, 4); | |
2355 | hdr = make_room(&mem_start, &mem_end, | |
2356 | sizeof(struct boot_param_header), 4); | |
2357 | RELOC(dt_header_start) = (unsigned long)hdr; | |
2358 | rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8); | |
2359 | ||
2360 | /* Start of strings */ | |
2361 | mem_start = PAGE_ALIGN(mem_start); | |
2362 | RELOC(dt_string_start) = mem_start; | |
2363 | mem_start += 4; /* hole */ | |
2364 | ||
2365 | /* Add "linux,phandle" in there, we'll need it */ | |
2366 | namep = make_room(&mem_start, &mem_end, 16, 1); | |
2367 | strcpy(namep, RELOC("linux,phandle")); | |
2368 | mem_start = (unsigned long)namep + strlen(namep) + 1; | |
2369 | ||
2370 | /* Build string array */ | |
2371 | prom_printf("Building dt strings...\n"); | |
2372 | scan_dt_build_strings(root, &mem_start, &mem_end); | |
2373 | RELOC(dt_string_end) = mem_start; | |
2374 | ||
2375 | /* Build structure */ | |
2376 | mem_start = PAGE_ALIGN(mem_start); | |
2377 | RELOC(dt_struct_start) = mem_start; | |
2378 | prom_printf("Building dt structure...\n"); | |
2379 | scan_dt_build_struct(root, &mem_start, &mem_end); | |
2380 | dt_push_token(OF_DT_END, &mem_start, &mem_end); | |
2381 | RELOC(dt_struct_end) = PAGE_ALIGN(mem_start); | |
2382 | ||
2383 | /* Finish header */ | |
2384 | hdr->boot_cpuid_phys = _prom->cpu; | |
2385 | hdr->magic = OF_DT_HEADER; | |
2386 | hdr->totalsize = RELOC(dt_struct_end) - RELOC(dt_header_start); | |
2387 | hdr->off_dt_struct = RELOC(dt_struct_start) - RELOC(dt_header_start); | |
2388 | hdr->off_dt_strings = RELOC(dt_string_start) - RELOC(dt_header_start); | |
2389 | hdr->dt_strings_size = RELOC(dt_string_end) - RELOC(dt_string_start); | |
2390 | hdr->off_mem_rsvmap = ((unsigned long)rsvmap) - RELOC(dt_header_start); | |
2391 | hdr->version = OF_DT_VERSION; | |
2392 | /* Version 16 is not backward compatible */ | |
2393 | hdr->last_comp_version = 0x10; | |
2394 | ||
4d1f3f25 | 2395 | /* Copy the reserve map in */ |
9b6b563c PM |
2396 | memcpy(rsvmap, RELOC(mem_reserve_map), sizeof(mem_reserve_map)); |
2397 | ||
2398 | #ifdef DEBUG_PROM | |
2399 | { | |
2400 | int i; | |
2401 | prom_printf("reserved memory map:\n"); | |
2402 | for (i = 0; i < RELOC(mem_reserve_cnt); i++) | |
2403 | prom_printf(" %x - %x\n", | |
2404 | RELOC(mem_reserve_map)[i].base, | |
2405 | RELOC(mem_reserve_map)[i].size); | |
2406 | } | |
2407 | #endif | |
4d1f3f25 JX |
2408 | /* Bump mem_reserve_cnt to cause further reservations to fail |
2409 | * since it's too late. | |
2410 | */ | |
9b6b563c PM |
2411 | RELOC(mem_reserve_cnt) = MEM_RESERVE_MAP_SIZE; |
2412 | ||
2413 | prom_printf("Device tree strings 0x%x -> 0x%x\n", | |
2414 | RELOC(dt_string_start), RELOC(dt_string_end)); | |
2415 | prom_printf("Device tree struct 0x%x -> 0x%x\n", | |
2416 | RELOC(dt_struct_start), RELOC(dt_struct_end)); | |
2417 | ||
2418 | } | |
2419 | ||
54f4ee18 HB |
2420 | #ifdef CONFIG_PPC_MAPLE |
2421 | /* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property. | |
2422 | * The values are bad, and it doesn't even have the right number of cells. */ | |
2423 | static void __init fixup_device_tree_maple(void) | |
9b6b563c | 2424 | { |
54f4ee18 | 2425 | phandle isa; |
980a6513 | 2426 | u32 rloc = 0x01002000; /* IO space; PCI device = 4 */ |
54f4ee18 | 2427 | u32 isa_ranges[6]; |
980a6513 BH |
2428 | char *name; |
2429 | ||
2430 | name = "/ht@0/isa@4"; | |
2431 | isa = call_prom("finddevice", 1, 1, ADDR(name)); | |
2432 | if (!PHANDLE_VALID(isa)) { | |
2433 | name = "/ht@0/isa@6"; | |
2434 | isa = call_prom("finddevice", 1, 1, ADDR(name)); | |
2435 | rloc = 0x01003000; /* IO space; PCI device = 6 */ | |
2436 | } | |
54f4ee18 HB |
2437 | if (!PHANDLE_VALID(isa)) |
2438 | return; | |
2439 | ||
980a6513 BH |
2440 | if (prom_getproplen(isa, "ranges") != 12) |
2441 | return; | |
54f4ee18 HB |
2442 | if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges)) |
2443 | == PROM_ERROR) | |
2444 | return; | |
2445 | ||
2446 | if (isa_ranges[0] != 0x1 || | |
2447 | isa_ranges[1] != 0xf4000000 || | |
2448 | isa_ranges[2] != 0x00010000) | |
2449 | return; | |
2450 | ||
980a6513 | 2451 | prom_printf("Fixing up bogus ISA range on Maple/Apache...\n"); |
54f4ee18 HB |
2452 | |
2453 | isa_ranges[0] = 0x1; | |
2454 | isa_ranges[1] = 0x0; | |
980a6513 | 2455 | isa_ranges[2] = rloc; |
54f4ee18 HB |
2456 | isa_ranges[3] = 0x0; |
2457 | isa_ranges[4] = 0x0; | |
2458 | isa_ranges[5] = 0x00010000; | |
980a6513 | 2459 | prom_setprop(isa, name, "ranges", |
54f4ee18 HB |
2460 | isa_ranges, sizeof(isa_ranges)); |
2461 | } | |
8f101a05 HC |
2462 | |
2463 | #define CPC925_MC_START 0xf8000000 | |
2464 | #define CPC925_MC_LENGTH 0x1000000 | |
2465 | /* The values for memory-controller don't have right number of cells */ | |
2466 | static void __init fixup_device_tree_maple_memory_controller(void) | |
2467 | { | |
2468 | phandle mc; | |
2469 | u32 mc_reg[4]; | |
2470 | char *name = "/hostbridge@f8000000"; | |
2471 | struct prom_t *_prom = &RELOC(prom); | |
2472 | u32 ac, sc; | |
2473 | ||
2474 | mc = call_prom("finddevice", 1, 1, ADDR(name)); | |
2475 | if (!PHANDLE_VALID(mc)) | |
2476 | return; | |
2477 | ||
2478 | if (prom_getproplen(mc, "reg") != 8) | |
2479 | return; | |
2480 | ||
2481 | prom_getprop(_prom->root, "#address-cells", &ac, sizeof(ac)); | |
2482 | prom_getprop(_prom->root, "#size-cells", &sc, sizeof(sc)); | |
2483 | if ((ac != 2) || (sc != 2)) | |
2484 | return; | |
2485 | ||
2486 | if (prom_getprop(mc, "reg", mc_reg, sizeof(mc_reg)) == PROM_ERROR) | |
2487 | return; | |
2488 | ||
2489 | if (mc_reg[0] != CPC925_MC_START || mc_reg[1] != CPC925_MC_LENGTH) | |
2490 | return; | |
2491 | ||
2492 | prom_printf("Fixing up bogus hostbridge on Maple...\n"); | |
2493 | ||
2494 | mc_reg[0] = 0x0; | |
2495 | mc_reg[1] = CPC925_MC_START; | |
2496 | mc_reg[2] = 0x0; | |
2497 | mc_reg[3] = CPC925_MC_LENGTH; | |
2498 | prom_setprop(mc, name, "reg", mc_reg, sizeof(mc_reg)); | |
2499 | } | |
54f4ee18 HB |
2500 | #else |
2501 | #define fixup_device_tree_maple() | |
8f101a05 | 2502 | #define fixup_device_tree_maple_memory_controller() |
54f4ee18 HB |
2503 | #endif |
2504 | ||
e8c0acf9 | 2505 | #ifdef CONFIG_PPC_CHRP |
e4805922 OH |
2506 | /* |
2507 | * Pegasos and BriQ lacks the "ranges" property in the isa node | |
2508 | * Pegasos needs decimal IRQ 14/15, not hexadecimal | |
556ecf9b | 2509 | * Pegasos has the IDE configured in legacy mode, but advertised as native |
e4805922 | 2510 | */ |
e8c0acf9 BH |
2511 | static void __init fixup_device_tree_chrp(void) |
2512 | { | |
e4805922 OH |
2513 | phandle ph; |
2514 | u32 prop[6]; | |
26c5032e | 2515 | u32 rloc = 0x01006000; /* IO space; PCI device = 12 */ |
e8c0acf9 BH |
2516 | char *name; |
2517 | int rc; | |
2518 | ||
2519 | name = "/pci@80000000/isa@c"; | |
e4805922 OH |
2520 | ph = call_prom("finddevice", 1, 1, ADDR(name)); |
2521 | if (!PHANDLE_VALID(ph)) { | |
26c5032e | 2522 | name = "/pci@ff500000/isa@6"; |
e4805922 | 2523 | ph = call_prom("finddevice", 1, 1, ADDR(name)); |
26c5032e BH |
2524 | rloc = 0x01003000; /* IO space; PCI device = 6 */ |
2525 | } | |
e4805922 OH |
2526 | if (PHANDLE_VALID(ph)) { |
2527 | rc = prom_getproplen(ph, "ranges"); | |
2528 | if (rc == 0 || rc == PROM_ERROR) { | |
2529 | prom_printf("Fixing up missing ISA range on Pegasos...\n"); | |
2530 | ||
2531 | prop[0] = 0x1; | |
2532 | prop[1] = 0x0; | |
2533 | prop[2] = rloc; | |
2534 | prop[3] = 0x0; | |
2535 | prop[4] = 0x0; | |
2536 | prop[5] = 0x00010000; | |
2537 | prom_setprop(ph, name, "ranges", prop, sizeof(prop)); | |
2538 | } | |
2539 | } | |
e8c0acf9 | 2540 | |
e4805922 OH |
2541 | name = "/pci@80000000/ide@C,1"; |
2542 | ph = call_prom("finddevice", 1, 1, ADDR(name)); | |
2543 | if (PHANDLE_VALID(ph)) { | |
2544 | prom_printf("Fixing up IDE interrupt on Pegasos...\n"); | |
2545 | prop[0] = 14; | |
2546 | prop[1] = 0x0; | |
556ecf9b OH |
2547 | prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32)); |
2548 | prom_printf("Fixing up IDE class-code on Pegasos...\n"); | |
2549 | rc = prom_getprop(ph, "class-code", prop, sizeof(u32)); | |
2550 | if (rc == sizeof(u32)) { | |
2551 | prop[0] &= ~0x5; | |
2552 | prom_setprop(ph, name, "class-code", prop, sizeof(u32)); | |
2553 | } | |
e4805922 | 2554 | } |
e8c0acf9 BH |
2555 | } |
2556 | #else | |
2557 | #define fixup_device_tree_chrp() | |
2558 | #endif | |
2559 | ||
9b6b563c | 2560 | #if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC) |
54f4ee18 HB |
2561 | static void __init fixup_device_tree_pmac(void) |
2562 | { | |
9b6b563c PM |
2563 | phandle u3, i2c, mpic; |
2564 | u32 u3_rev; | |
2565 | u32 interrupts[2]; | |
2566 | u32 parent; | |
2567 | ||
2568 | /* Some G5s have a missing interrupt definition, fix it up here */ | |
2569 | u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000")); | |
2570 | if (!PHANDLE_VALID(u3)) | |
2571 | return; | |
2572 | i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000")); | |
2573 | if (!PHANDLE_VALID(i2c)) | |
2574 | return; | |
2575 | mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000")); | |
2576 | if (!PHANDLE_VALID(mpic)) | |
2577 | return; | |
2578 | ||
2579 | /* check if proper rev of u3 */ | |
2580 | if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev)) | |
2581 | == PROM_ERROR) | |
2582 | return; | |
7d49697e | 2583 | if (u3_rev < 0x35 || u3_rev > 0x39) |
9b6b563c PM |
2584 | return; |
2585 | /* does it need fixup ? */ | |
2586 | if (prom_getproplen(i2c, "interrupts") > 0) | |
2587 | return; | |
2588 | ||
2589 | prom_printf("fixing up bogus interrupts for u3 i2c...\n"); | |
2590 | ||
2591 | /* interrupt on this revision of u3 is number 0 and level */ | |
2592 | interrupts[0] = 0; | |
2593 | interrupts[1] = 1; | |
a23414be PM |
2594 | prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts", |
2595 | &interrupts, sizeof(interrupts)); | |
9b6b563c | 2596 | parent = (u32)mpic; |
a23414be PM |
2597 | prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent", |
2598 | &parent, sizeof(parent)); | |
9b6b563c | 2599 | } |
54f4ee18 HB |
2600 | #else |
2601 | #define fixup_device_tree_pmac() | |
2602 | #endif | |
9b6b563c | 2603 | |
88fd2a9d | 2604 | #ifdef CONFIG_PPC_EFIKA |
94d2dde7 GL |
2605 | /* |
2606 | * The MPC5200 FEC driver requires an phy-handle property to tell it how | |
2607 | * to talk to the phy. If the phy-handle property is missing, then this | |
2608 | * function is called to add the appropriate nodes and link it to the | |
2609 | * ethernet node. | |
2610 | */ | |
2611 | static void __init fixup_device_tree_efika_add_phy(void) | |
88fd2a9d | 2612 | { |
88fd2a9d SM |
2613 | u32 node; |
2614 | char prop[64]; | |
94d2dde7 | 2615 | int rv; |
88fd2a9d | 2616 | |
94d2dde7 GL |
2617 | /* Check if /builtin/ethernet exists - bail if it doesn't */ |
2618 | node = call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet")); | |
88fd2a9d SM |
2619 | if (!PHANDLE_VALID(node)) |
2620 | return; | |
2621 | ||
94d2dde7 GL |
2622 | /* Check if the phy-handle property exists - bail if it does */ |
2623 | rv = prom_getprop(node, "phy-handle", prop, sizeof(prop)); | |
2624 | if (!rv) | |
88fd2a9d SM |
2625 | return; |
2626 | ||
94d2dde7 GL |
2627 | /* |
2628 | * At this point the ethernet device doesn't have a phy described. | |
2629 | * Now we need to add the missing phy node and linkage | |
2630 | */ | |
6f4347c9 | 2631 | |
94d2dde7 | 2632 | /* Check for an MDIO bus node - if missing then create one */ |
6f4347c9 OH |
2633 | node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio")); |
2634 | if (!PHANDLE_VALID(node)) { | |
2635 | prom_printf("Adding Ethernet MDIO node\n"); | |
2636 | call_prom("interpret", 1, 1, | |
2637 | " s\" /builtin\" find-device" | |
2638 | " new-device" | |
2639 | " 1 encode-int s\" #address-cells\" property" | |
2640 | " 0 encode-int s\" #size-cells\" property" | |
94d2dde7 GL |
2641 | " s\" mdio\" device-name" |
2642 | " s\" fsl,mpc5200b-mdio\" encode-string" | |
6f4347c9 OH |
2643 | " s\" compatible\" property" |
2644 | " 0xf0003000 0x400 reg" | |
2645 | " 0x2 encode-int" | |
2646 | " 0x5 encode-int encode+" | |
2647 | " 0x3 encode-int encode+" | |
2648 | " s\" interrupts\" property" | |
2649 | " finish-device"); | |
2650 | }; | |
2651 | ||
94d2dde7 GL |
2652 | /* Check for a PHY device node - if missing then create one and |
2653 | * give it's phandle to the ethernet node */ | |
2654 | node = call_prom("finddevice", 1, 1, | |
2655 | ADDR("/builtin/mdio/ethernet-phy")); | |
6f4347c9 OH |
2656 | if (!PHANDLE_VALID(node)) { |
2657 | prom_printf("Adding Ethernet PHY node\n"); | |
2658 | call_prom("interpret", 1, 1, | |
2659 | " s\" /builtin/mdio\" find-device" | |
2660 | " new-device" | |
2661 | " s\" ethernet-phy\" device-name" | |
2662 | " 0x10 encode-int s\" reg\" property" | |
2663 | " my-self" | |
2664 | " ihandle>phandle" | |
2665 | " finish-device" | |
2666 | " s\" /builtin/ethernet\" find-device" | |
2667 | " encode-int" | |
2668 | " s\" phy-handle\" property" | |
2669 | " device-end"); | |
2670 | } | |
94d2dde7 GL |
2671 | } |
2672 | ||
2673 | static void __init fixup_device_tree_efika(void) | |
2674 | { | |
2675 | int sound_irq[3] = { 2, 2, 0 }; | |
2676 | int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0, | |
2677 | 3,4,0, 3,5,0, 3,6,0, 3,7,0, | |
2678 | 3,8,0, 3,9,0, 3,10,0, 3,11,0, | |
2679 | 3,12,0, 3,13,0, 3,14,0, 3,15,0 }; | |
2680 | u32 node; | |
2681 | char prop[64]; | |
2682 | int rv, len; | |
2683 | ||
2684 | /* Check if we're really running on a EFIKA */ | |
2685 | node = call_prom("finddevice", 1, 1, ADDR("/")); | |
2686 | if (!PHANDLE_VALID(node)) | |
2687 | return; | |
2688 | ||
2689 | rv = prom_getprop(node, "model", prop, sizeof(prop)); | |
2690 | if (rv == PROM_ERROR) | |
2691 | return; | |
2692 | if (strcmp(prop, "EFIKA5K2")) | |
2693 | return; | |
2694 | ||
2695 | prom_printf("Applying EFIKA device tree fixups\n"); | |
2696 | ||
2697 | /* Claiming to be 'chrp' is death */ | |
2698 | node = call_prom("finddevice", 1, 1, ADDR("/")); | |
2699 | rv = prom_getprop(node, "device_type", prop, sizeof(prop)); | |
2700 | if (rv != PROM_ERROR && (strcmp(prop, "chrp") == 0)) | |
2701 | prom_setprop(node, "/", "device_type", "efika", sizeof("efika")); | |
2702 | ||
7f4392cd DW |
2703 | /* CODEGEN,description is exposed in /proc/cpuinfo so |
2704 | fix that too */ | |
2705 | rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop)); | |
2706 | if (rv != PROM_ERROR && (strstr(prop, "CHRP"))) | |
2707 | prom_setprop(node, "/", "CODEGEN,description", | |
2708 | "Efika 5200B PowerPC System", | |
2709 | sizeof("Efika 5200B PowerPC System")); | |
2710 | ||
94d2dde7 GL |
2711 | /* Fixup bestcomm interrupts property */ |
2712 | node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm")); | |
2713 | if (PHANDLE_VALID(node)) { | |
2714 | len = prom_getproplen(node, "interrupts"); | |
2715 | if (len == 12) { | |
2716 | prom_printf("Fixing bestcomm interrupts property\n"); | |
2717 | prom_setprop(node, "/builtin/bestcom", "interrupts", | |
2718 | bcomm_irq, sizeof(bcomm_irq)); | |
2719 | } | |
2720 | } | |
2721 | ||
2722 | /* Fixup sound interrupts property */ | |
2723 | node = call_prom("finddevice", 1, 1, ADDR("/builtin/sound")); | |
2724 | if (PHANDLE_VALID(node)) { | |
2725 | rv = prom_getprop(node, "interrupts", prop, sizeof(prop)); | |
2726 | if (rv == PROM_ERROR) { | |
2727 | prom_printf("Adding sound interrupts property\n"); | |
2728 | prom_setprop(node, "/builtin/sound", "interrupts", | |
2729 | sound_irq, sizeof(sound_irq)); | |
2730 | } | |
2731 | } | |
6f4347c9 | 2732 | |
94d2dde7 GL |
2733 | /* Make sure ethernet phy-handle property exists */ |
2734 | fixup_device_tree_efika_add_phy(); | |
88fd2a9d SM |
2735 | } |
2736 | #else | |
2737 | #define fixup_device_tree_efika() | |
2738 | #endif | |
2739 | ||
54f4ee18 HB |
2740 | static void __init fixup_device_tree(void) |
2741 | { | |
2742 | fixup_device_tree_maple(); | |
8f101a05 | 2743 | fixup_device_tree_maple_memory_controller(); |
e8c0acf9 | 2744 | fixup_device_tree_chrp(); |
54f4ee18 | 2745 | fixup_device_tree_pmac(); |
88fd2a9d | 2746 | fixup_device_tree_efika(); |
54f4ee18 | 2747 | } |
9b6b563c PM |
2748 | |
2749 | static void __init prom_find_boot_cpu(void) | |
2750 | { | |
e788ff13 | 2751 | struct prom_t *_prom = &RELOC(prom); |
9b6b563c PM |
2752 | u32 getprop_rval; |
2753 | ihandle prom_cpu; | |
2754 | phandle cpu_pkg; | |
2755 | ||
a575b807 | 2756 | _prom->cpu = 0; |
9b6b563c | 2757 | if (prom_getprop(_prom->chosen, "cpu", &prom_cpu, sizeof(prom_cpu)) <= 0) |
a575b807 | 2758 | return; |
9b6b563c PM |
2759 | |
2760 | cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu); | |
2761 | ||
2762 | prom_getprop(cpu_pkg, "reg", &getprop_rval, sizeof(getprop_rval)); | |
2763 | _prom->cpu = getprop_rval; | |
2764 | ||
2c48a7d6 | 2765 | prom_debug("Booting CPU hw index = %lu\n", _prom->cpu); |
9b6b563c PM |
2766 | } |
2767 | ||
2768 | static void __init prom_check_initrd(unsigned long r3, unsigned long r4) | |
2769 | { | |
2770 | #ifdef CONFIG_BLK_DEV_INITRD | |
e788ff13 | 2771 | struct prom_t *_prom = &RELOC(prom); |
9b6b563c PM |
2772 | |
2773 | if (r3 && r4 && r4 != 0xdeadbeef) { | |
2774 | unsigned long val; | |
2775 | ||
51fae6de | 2776 | RELOC(prom_initrd_start) = is_kernel_addr(r3) ? __pa(r3) : r3; |
9b6b563c PM |
2777 | RELOC(prom_initrd_end) = RELOC(prom_initrd_start) + r4; |
2778 | ||
2779 | val = RELOC(prom_initrd_start); | |
a23414be PM |
2780 | prom_setprop(_prom->chosen, "/chosen", "linux,initrd-start", |
2781 | &val, sizeof(val)); | |
9b6b563c | 2782 | val = RELOC(prom_initrd_end); |
a23414be PM |
2783 | prom_setprop(_prom->chosen, "/chosen", "linux,initrd-end", |
2784 | &val, sizeof(val)); | |
9b6b563c PM |
2785 | |
2786 | reserve_mem(RELOC(prom_initrd_start), | |
2787 | RELOC(prom_initrd_end) - RELOC(prom_initrd_start)); | |
2788 | ||
2789 | prom_debug("initrd_start=0x%x\n", RELOC(prom_initrd_start)); | |
2790 | prom_debug("initrd_end=0x%x\n", RELOC(prom_initrd_end)); | |
2791 | } | |
2792 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
2793 | } | |
2794 | ||
27f44888 | 2795 | |
9b6b563c PM |
2796 | /* |
2797 | * We enter here early on, when the Open Firmware prom is still | |
2798 | * handling exceptions and the MMU hash table for us. | |
2799 | */ | |
2800 | ||
2801 | unsigned long __init prom_init(unsigned long r3, unsigned long r4, | |
2802 | unsigned long pp, | |
549e8152 PM |
2803 | unsigned long r6, unsigned long r7, |
2804 | unsigned long kbase) | |
9b6b563c | 2805 | { |
e788ff13 | 2806 | struct prom_t *_prom; |
9b6b563c | 2807 | unsigned long hdr; |
9b6b563c PM |
2808 | |
2809 | #ifdef CONFIG_PPC32 | |
549e8152 | 2810 | unsigned long offset = reloc_offset(); |
9b6b563c PM |
2811 | reloc_got2(offset); |
2812 | #endif | |
2813 | ||
2814 | _prom = &RELOC(prom); | |
2815 | ||
2816 | /* | |
2817 | * First zero the BSS | |
2818 | */ | |
2819 | memset(&RELOC(__bss_start), 0, __bss_stop - __bss_start); | |
2820 | ||
2821 | /* | |
2822 | * Init interface to Open Firmware, get some node references, | |
2823 | * like /chosen | |
2824 | */ | |
2825 | prom_init_client_services(pp); | |
2826 | ||
2827 | /* | |
a23414be PM |
2828 | * See if this OF is old enough that we need to do explicit maps |
2829 | * and other workarounds | |
9b6b563c | 2830 | */ |
a23414be | 2831 | prom_find_mmu(); |
9b6b563c | 2832 | |
a575b807 | 2833 | /* |
a23414be | 2834 | * Init prom stdout device |
a575b807 | 2835 | */ |
a23414be | 2836 | prom_init_stdout(); |
a575b807 | 2837 | |
151a9f4a | 2838 | prom_printf("Preparing to boot %s", RELOC(linux_banner)); |
e7943fbb | 2839 | |
9b6b563c PM |
2840 | /* |
2841 | * Get default machine type. At this point, we do not differentiate | |
2842 | * between pSeries SMP and pSeries LPAR | |
2843 | */ | |
2844 | RELOC(of_platform) = prom_find_machine_type(); | |
6e35d5da | 2845 | prom_printf("Detected machine type: %x\n", RELOC(of_platform)); |
9b6b563c | 2846 | |
549e8152 | 2847 | #ifndef CONFIG_RELOCATABLE |
add60ef3 OH |
2848 | /* Bail if this is a kdump kernel. */ |
2849 | if (PHYSICAL_START > 0) | |
2850 | prom_panic("Error: You can't boot a kdump kernel from OF!\n"); | |
549e8152 | 2851 | #endif |
add60ef3 OH |
2852 | |
2853 | /* | |
2854 | * Check for an initrd | |
2855 | */ | |
2856 | prom_check_initrd(r3, r4); | |
2857 | ||
27f44888 | 2858 | #if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV) |
9b6b563c PM |
2859 | /* |
2860 | * On pSeries, inform the firmware about our capabilities | |
2861 | */ | |
799d6046 PM |
2862 | if (RELOC(of_platform) == PLATFORM_PSERIES || |
2863 | RELOC(of_platform) == PLATFORM_PSERIES_LPAR) | |
9b6b563c PM |
2864 | prom_send_capabilities(); |
2865 | #endif | |
2866 | ||
9b6b563c | 2867 | /* |
f3f66f59 | 2868 | * Copy the CPU hold code |
9b6b563c | 2869 | */ |
e788ff13 | 2870 | if (RELOC(of_platform) != PLATFORM_POWERMAC) |
549e8152 | 2871 | copy_and_flush(0, kbase, 0x100, 0); |
9b6b563c PM |
2872 | |
2873 | /* | |
2874 | * Do early parsing of command line | |
2875 | */ | |
2876 | early_cmdline_parse(); | |
2877 | ||
2878 | /* | |
2879 | * Initialize memory management within prom_init | |
2880 | */ | |
2881 | prom_init_mem(); | |
2882 | ||
2883 | /* | |
2884 | * Determine which cpu is actually running right _now_ | |
2885 | */ | |
2886 | prom_find_boot_cpu(); | |
2887 | ||
2888 | /* | |
2889 | * Initialize display devices | |
2890 | */ | |
2891 | prom_check_displays(); | |
2892 | ||
2893 | #ifdef CONFIG_PPC64 | |
2894 | /* | |
2895 | * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else | |
2896 | * that uses the allocator, we need to make sure we get the top of memory | |
2897 | * available for us here... | |
2898 | */ | |
2899 | if (RELOC(of_platform) == PLATFORM_PSERIES) | |
2900 | prom_initialize_tce_table(); | |
2901 | #endif | |
2902 | ||
2903 | /* | |
27f44888 BH |
2904 | * On non-powermacs, try to instantiate RTAS. PowerMacs don't |
2905 | * have a usable RTAS implementation. | |
9b6b563c | 2906 | */ |
6e35d5da BH |
2907 | if (RELOC(of_platform) != PLATFORM_POWERMAC && |
2908 | RELOC(of_platform) != PLATFORM_OPAL) | |
9b6b563c | 2909 | prom_instantiate_rtas(); |
27f44888 BH |
2910 | |
2911 | #ifdef CONFIG_PPC_POWERNV | |
2912 | /* Detect HAL and try instanciating it & doing takeover */ | |
2913 | if (RELOC(of_platform) == PLATFORM_PSERIES_LPAR) { | |
2914 | prom_query_opal(); | |
2915 | if (RELOC(of_platform) == PLATFORM_OPAL) { | |
2916 | prom_opal_hold_cpus(); | |
2917 | prom_opal_takeover(); | |
2918 | } | |
6e35d5da BH |
2919 | } else if (RELOC(of_platform) == PLATFORM_OPAL) |
2920 | prom_instantiate_opal(); | |
27f44888 BH |
2921 | #endif |
2922 | ||
2923 | /* | |
2924 | * On non-powermacs, put all CPUs in spin-loops. | |
2925 | * | |
2926 | * PowerMacs use a different mechanism to spin CPUs | |
2927 | */ | |
6e35d5da BH |
2928 | if (RELOC(of_platform) != PLATFORM_POWERMAC && |
2929 | RELOC(of_platform) != PLATFORM_OPAL) | |
27f44888 | 2930 | prom_hold_cpus(); |
9b6b563c PM |
2931 | |
2932 | /* | |
2933 | * Fill in some infos for use by the kernel later on | |
2934 | */ | |
cf68787b BK |
2935 | if (RELOC(prom_memory_limit)) |
2936 | prom_setprop(_prom->chosen, "/chosen", "linux,memory-limit", | |
2937 | &RELOC(prom_memory_limit), | |
2938 | sizeof(prom_memory_limit)); | |
9b6b563c | 2939 | #ifdef CONFIG_PPC64 |
165785e5 | 2940 | if (RELOC(prom_iommu_off)) |
a23414be PM |
2941 | prom_setprop(_prom->chosen, "/chosen", "linux,iommu-off", |
2942 | NULL, 0); | |
9b6b563c | 2943 | |
165785e5 | 2944 | if (RELOC(prom_iommu_force_on)) |
a23414be PM |
2945 | prom_setprop(_prom->chosen, "/chosen", "linux,iommu-force-on", |
2946 | NULL, 0); | |
9b6b563c PM |
2947 | |
2948 | if (RELOC(prom_tce_alloc_start)) { | |
a23414be | 2949 | prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-start", |
9b6b563c PM |
2950 | &RELOC(prom_tce_alloc_start), |
2951 | sizeof(prom_tce_alloc_start)); | |
a23414be | 2952 | prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-end", |
9b6b563c PM |
2953 | &RELOC(prom_tce_alloc_end), |
2954 | sizeof(prom_tce_alloc_end)); | |
2955 | } | |
2956 | #endif | |
2957 | ||
2958 | /* | |
2959 | * Fixup any known bugs in the device-tree | |
2960 | */ | |
2961 | fixup_device_tree(); | |
2962 | ||
2963 | /* | |
2964 | * Now finally create the flattened device-tree | |
2965 | */ | |
1f8737aa | 2966 | prom_printf("copying OF device tree...\n"); |
9b6b563c PM |
2967 | flatten_device_tree(); |
2968 | ||
3825ac0e PM |
2969 | /* |
2970 | * in case stdin is USB and still active on IBM machines... | |
2971 | * Unfortunately quiesce crashes on some powermacs if we have | |
2972 | * closed stdin already (in particular the powerbook 101). | |
2973 | */ | |
2974 | if (RELOC(of_platform) != PLATFORM_POWERMAC) | |
2975 | prom_close_stdin(); | |
9b6b563c PM |
2976 | |
2977 | /* | |
2978 | * Call OF "quiesce" method to shut down pending DMA's from | |
2979 | * devices etc... | |
2980 | */ | |
1f8737aa | 2981 | prom_printf("Calling quiesce...\n"); |
9b6b563c PM |
2982 | call_prom("quiesce", 0, 0); |
2983 | ||
2984 | /* | |
2985 | * And finally, call the kernel passing it the flattened device | |
2986 | * tree and NULL as r5, thus triggering the new entry point which | |
2987 | * is common to us and kexec | |
2988 | */ | |
2989 | hdr = RELOC(dt_header_start); | |
2990 | prom_printf("returning from prom_init\n"); | |
2991 | prom_debug("->dt_header_start=0x%x\n", hdr); | |
2992 | ||
2993 | #ifdef CONFIG_PPC32 | |
2994 | reloc_got2(-offset); | |
2995 | #endif | |
2996 | ||
6e35d5da BH |
2997 | #ifdef CONFIG_PPC_EARLY_DEBUG_OPAL |
2998 | /* OPAL early debug gets the OPAL base & entry in r8 and r9 */ | |
2999 | __start(hdr, kbase, 0, 0, 0, | |
3000 | RELOC(prom_opal_base), RELOC(prom_opal_entry)); | |
3001 | #else | |
3002 | __start(hdr, kbase, 0, 0, 0, 0, 0); | |
3003 | #endif | |
9b6b563c PM |
3004 | |
3005 | return 0; | |
3006 | } |