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9b6b563c PM |
1 | /* |
2 | * Procedures for interfacing to Open Firmware. | |
3 | * | |
4 | * Paul Mackerras August 1996. | |
5 | * Copyright (C) 1996-2005 Paul Mackerras. | |
6 | * | |
7 | * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner. | |
8 | * {engebret|bergner}@us.ibm.com | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License | |
12 | * as published by the Free Software Foundation; either version | |
13 | * 2 of the License, or (at your option) any later version. | |
14 | */ | |
15 | ||
16 | #undef DEBUG_PROM | |
17 | ||
18 | #include <stdarg.h> | |
9b6b563c PM |
19 | #include <linux/kernel.h> |
20 | #include <linux/string.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/threads.h> | |
23 | #include <linux/spinlock.h> | |
24 | #include <linux/types.h> | |
25 | #include <linux/pci.h> | |
26 | #include <linux/proc_fs.h> | |
27 | #include <linux/stringify.h> | |
28 | #include <linux/delay.h> | |
29 | #include <linux/initrd.h> | |
30 | #include <linux/bitops.h> | |
31 | #include <asm/prom.h> | |
32 | #include <asm/rtas.h> | |
33 | #include <asm/page.h> | |
34 | #include <asm/processor.h> | |
35 | #include <asm/irq.h> | |
36 | #include <asm/io.h> | |
37 | #include <asm/smp.h> | |
38 | #include <asm/system.h> | |
39 | #include <asm/mmu.h> | |
40 | #include <asm/pgtable.h> | |
41 | #include <asm/pci.h> | |
42 | #include <asm/iommu.h> | |
9b6b563c PM |
43 | #include <asm/btext.h> |
44 | #include <asm/sections.h> | |
45 | #include <asm/machdep.h> | |
46 | ||
47 | #ifdef CONFIG_LOGO_LINUX_CLUT224 | |
48 | #include <linux/linux_logo.h> | |
49 | extern const struct linux_logo logo_linux_clut224; | |
50 | #endif | |
51 | ||
52 | /* | |
53 | * Properties whose value is longer than this get excluded from our | |
54 | * copy of the device tree. This value does need to be big enough to | |
55 | * ensure that we don't lose things like the interrupt-map property | |
56 | * on a PCI-PCI bridge. | |
57 | */ | |
58 | #define MAX_PROPERTY_LENGTH (1UL * 1024 * 1024) | |
59 | ||
60 | /* | |
61 | * Eventually bump that one up | |
62 | */ | |
63 | #define DEVTREE_CHUNK_SIZE 0x100000 | |
64 | ||
65 | /* | |
66 | * This is the size of the local memory reserve map that gets copied | |
67 | * into the boot params passed to the kernel. That size is totally | |
68 | * flexible as the kernel just reads the list until it encounters an | |
69 | * entry with size 0, so it can be changed without breaking binary | |
70 | * compatibility | |
71 | */ | |
72 | #define MEM_RESERVE_MAP_SIZE 8 | |
73 | ||
74 | /* | |
75 | * prom_init() is called very early on, before the kernel text | |
76 | * and data have been mapped to KERNELBASE. At this point the code | |
77 | * is running at whatever address it has been loaded at. | |
78 | * On ppc32 we compile with -mrelocatable, which means that references | |
79 | * to extern and static variables get relocated automatically. | |
80 | * On ppc64 we have to relocate the references explicitly with | |
81 | * RELOC. (Note that strings count as static variables.) | |
82 | * | |
83 | * Because OF may have mapped I/O devices into the area starting at | |
84 | * KERNELBASE, particularly on CHRP machines, we can't safely call | |
85 | * OF once the kernel has been mapped to KERNELBASE. Therefore all | |
86 | * OF calls must be done within prom_init(). | |
87 | * | |
88 | * ADDR is used in calls to call_prom. The 4th and following | |
89 | * arguments to call_prom should be 32-bit values. | |
90 | * On ppc64, 64 bit values are truncated to 32 bits (and | |
91 | * fortunately don't get interpreted as two arguments). | |
92 | */ | |
93 | #ifdef CONFIG_PPC64 | |
94 | #define RELOC(x) (*PTRRELOC(&(x))) | |
95 | #define ADDR(x) (u32) add_reloc_offset((unsigned long)(x)) | |
a23414be | 96 | #define OF_WORKAROUNDS 0 |
9b6b563c PM |
97 | #else |
98 | #define RELOC(x) (x) | |
99 | #define ADDR(x) (u32) (x) | |
a23414be PM |
100 | #define OF_WORKAROUNDS of_workarounds |
101 | int of_workarounds; | |
9b6b563c PM |
102 | #endif |
103 | ||
a23414be PM |
104 | #define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */ |
105 | #define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */ | |
106 | ||
9b6b563c PM |
107 | #define PROM_BUG() do { \ |
108 | prom_printf("kernel BUG at %s line 0x%x!\n", \ | |
109 | RELOC(__FILE__), __LINE__); \ | |
110 | __asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \ | |
111 | } while (0) | |
112 | ||
113 | #ifdef DEBUG_PROM | |
114 | #define prom_debug(x...) prom_printf(x) | |
115 | #else | |
116 | #define prom_debug(x...) | |
117 | #endif | |
118 | ||
9b6b563c PM |
119 | |
120 | typedef u32 prom_arg_t; | |
121 | ||
122 | struct prom_args { | |
123 | u32 service; | |
124 | u32 nargs; | |
125 | u32 nret; | |
126 | prom_arg_t args[10]; | |
127 | }; | |
128 | ||
129 | struct prom_t { | |
130 | ihandle root; | |
a23414be | 131 | phandle chosen; |
9b6b563c PM |
132 | int cpu; |
133 | ihandle stdout; | |
a575b807 | 134 | ihandle mmumap; |
a23414be | 135 | ihandle memory; |
9b6b563c PM |
136 | }; |
137 | ||
138 | struct mem_map_entry { | |
cbbcf340 KG |
139 | u64 base; |
140 | u64 size; | |
9b6b563c PM |
141 | }; |
142 | ||
143 | typedef u32 cell_t; | |
144 | ||
145 | extern void __start(unsigned long r3, unsigned long r4, unsigned long r5); | |
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 | |
176 | static int __initdata iommu_force_on; | |
177 | static int __initdata ppc64_iommu_off; | |
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 | |
191 | ||
9b6b563c PM |
192 | static int __initdata of_platform; |
193 | ||
194 | static char __initdata prom_cmd_line[COMMAND_LINE_SIZE]; | |
195 | ||
9b6b563c PM |
196 | static unsigned long __initdata alloc_top; |
197 | static unsigned long __initdata alloc_top_high; | |
198 | static unsigned long __initdata alloc_bottom; | |
199 | static unsigned long __initdata rmo_top; | |
200 | static unsigned long __initdata ram_top; | |
201 | ||
202 | static struct mem_map_entry __initdata mem_reserve_map[MEM_RESERVE_MAP_SIZE]; | |
203 | static int __initdata mem_reserve_cnt; | |
204 | ||
205 | static cell_t __initdata regbuf[1024]; | |
206 | ||
207 | ||
208 | #define MAX_CPU_THREADS 2 | |
209 | ||
9b6b563c PM |
210 | /* |
211 | * Error results ... some OF calls will return "-1" on error, some | |
212 | * will return 0, some will return either. To simplify, here are | |
213 | * macros to use with any ihandle or phandle return value to check if | |
214 | * it is valid | |
215 | */ | |
216 | ||
217 | #define PROM_ERROR (-1u) | |
218 | #define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR) | |
219 | #define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR) | |
220 | ||
221 | ||
222 | /* This is the one and *ONLY* place where we actually call open | |
223 | * firmware. | |
224 | */ | |
225 | ||
226 | static int __init call_prom(const char *service, int nargs, int nret, ...) | |
227 | { | |
228 | int i; | |
229 | struct prom_args args; | |
230 | va_list list; | |
231 | ||
232 | args.service = ADDR(service); | |
233 | args.nargs = nargs; | |
234 | args.nret = nret; | |
235 | ||
236 | va_start(list, nret); | |
237 | for (i = 0; i < nargs; i++) | |
238 | args.args[i] = va_arg(list, prom_arg_t); | |
239 | va_end(list); | |
240 | ||
241 | for (i = 0; i < nret; i++) | |
242 | args.args[nargs+i] = 0; | |
243 | ||
c4988820 PM |
244 | if (enter_prom(&args, RELOC(prom_entry)) < 0) |
245 | return PROM_ERROR; | |
9b6b563c PM |
246 | |
247 | return (nret > 0) ? args.args[nargs] : 0; | |
248 | } | |
249 | ||
250 | static int __init call_prom_ret(const char *service, int nargs, int nret, | |
251 | prom_arg_t *rets, ...) | |
252 | { | |
253 | int i; | |
254 | struct prom_args args; | |
255 | va_list list; | |
256 | ||
257 | args.service = ADDR(service); | |
258 | args.nargs = nargs; | |
259 | args.nret = nret; | |
260 | ||
261 | va_start(list, rets); | |
262 | for (i = 0; i < nargs; i++) | |
263 | args.args[i] = va_arg(list, prom_arg_t); | |
264 | va_end(list); | |
265 | ||
266 | for (i = 0; i < nret; i++) | |
ed1189b7 | 267 | args.args[nargs+i] = 0; |
9b6b563c | 268 | |
c4988820 PM |
269 | if (enter_prom(&args, RELOC(prom_entry)) < 0) |
270 | return PROM_ERROR; | |
9b6b563c PM |
271 | |
272 | if (rets != NULL) | |
273 | for (i = 1; i < nret; ++i) | |
c5200c90 | 274 | rets[i-1] = args.args[nargs+i]; |
9b6b563c PM |
275 | |
276 | return (nret > 0) ? args.args[nargs] : 0; | |
277 | } | |
278 | ||
279 | ||
9b6b563c PM |
280 | static void __init prom_print(const char *msg) |
281 | { | |
282 | const char *p, *q; | |
283 | struct prom_t *_prom = &RELOC(prom); | |
284 | ||
285 | if (_prom->stdout == 0) | |
286 | return; | |
287 | ||
288 | for (p = msg; *p != 0; p = q) { | |
289 | for (q = p; *q != 0 && *q != '\n'; ++q) | |
290 | ; | |
291 | if (q > p) | |
292 | call_prom("write", 3, 1, _prom->stdout, p, q - p); | |
293 | if (*q == 0) | |
294 | break; | |
295 | ++q; | |
296 | call_prom("write", 3, 1, _prom->stdout, ADDR("\r\n"), 2); | |
297 | } | |
298 | } | |
299 | ||
300 | ||
301 | static void __init prom_print_hex(unsigned long val) | |
302 | { | |
303 | int i, nibbles = sizeof(val)*2; | |
304 | char buf[sizeof(val)*2+1]; | |
305 | struct prom_t *_prom = &RELOC(prom); | |
306 | ||
307 | for (i = nibbles-1; i >= 0; i--) { | |
308 | buf[i] = (val & 0xf) + '0'; | |
309 | if (buf[i] > '9') | |
310 | buf[i] += ('a'-'0'-10); | |
311 | val >>= 4; | |
312 | } | |
313 | buf[nibbles] = '\0'; | |
314 | call_prom("write", 3, 1, _prom->stdout, buf, nibbles); | |
315 | } | |
316 | ||
317 | ||
318 | static void __init prom_printf(const char *format, ...) | |
319 | { | |
320 | const char *p, *q, *s; | |
321 | va_list args; | |
322 | unsigned long v; | |
323 | struct prom_t *_prom = &RELOC(prom); | |
324 | ||
325 | va_start(args, format); | |
326 | #ifdef CONFIG_PPC64 | |
327 | format = PTRRELOC(format); | |
328 | #endif | |
329 | for (p = format; *p != 0; p = q) { | |
330 | for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q) | |
331 | ; | |
332 | if (q > p) | |
333 | call_prom("write", 3, 1, _prom->stdout, p, q - p); | |
334 | if (*q == 0) | |
335 | break; | |
336 | if (*q == '\n') { | |
337 | ++q; | |
338 | call_prom("write", 3, 1, _prom->stdout, | |
339 | ADDR("\r\n"), 2); | |
340 | continue; | |
341 | } | |
342 | ++q; | |
343 | if (*q == 0) | |
344 | break; | |
345 | switch (*q) { | |
346 | case 's': | |
347 | ++q; | |
348 | s = va_arg(args, const char *); | |
349 | prom_print(s); | |
350 | break; | |
351 | case 'x': | |
352 | ++q; | |
353 | v = va_arg(args, unsigned long); | |
354 | prom_print_hex(v); | |
355 | break; | |
356 | } | |
357 | } | |
358 | } | |
359 | ||
360 | ||
a575b807 PM |
361 | static unsigned int __init prom_claim(unsigned long virt, unsigned long size, |
362 | unsigned long align) | |
363 | { | |
a575b807 PM |
364 | struct prom_t *_prom = &RELOC(prom); |
365 | ||
a23414be PM |
366 | if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) { |
367 | /* | |
368 | * Old OF requires we claim physical and virtual separately | |
369 | * and then map explicitly (assuming virtual mode) | |
370 | */ | |
371 | int ret; | |
372 | prom_arg_t result; | |
373 | ||
374 | ret = call_prom_ret("call-method", 5, 2, &result, | |
375 | ADDR("claim"), _prom->memory, | |
376 | align, size, virt); | |
377 | if (ret != 0 || result == -1) | |
378 | return -1; | |
379 | ret = call_prom_ret("call-method", 5, 2, &result, | |
380 | ADDR("claim"), _prom->mmumap, | |
381 | align, size, virt); | |
382 | if (ret != 0) { | |
383 | call_prom("call-method", 4, 1, ADDR("release"), | |
384 | _prom->memory, size, virt); | |
385 | return -1; | |
386 | } | |
387 | /* the 0x12 is M (coherence) + PP == read/write */ | |
a575b807 | 388 | call_prom("call-method", 6, 1, |
a23414be PM |
389 | ADDR("map"), _prom->mmumap, 0x12, size, virt, virt); |
390 | return virt; | |
391 | } | |
392 | return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size, | |
393 | (prom_arg_t)align); | |
a575b807 PM |
394 | } |
395 | ||
9b6b563c PM |
396 | static void __init __attribute__((noreturn)) prom_panic(const char *reason) |
397 | { | |
398 | #ifdef CONFIG_PPC64 | |
399 | reason = PTRRELOC(reason); | |
400 | #endif | |
401 | prom_print(reason); | |
add60ef3 OH |
402 | /* Do not call exit because it clears the screen on pmac |
403 | * it also causes some sort of double-fault on early pmacs */ | |
404 | if (RELOC(of_platform) == PLATFORM_POWERMAC) | |
405 | asm("trap\n"); | |
406 | ||
9b6b563c PM |
407 | /* ToDo: should put up an SRC here on p/iSeries */ |
408 | call_prom("exit", 0, 0); | |
409 | ||
410 | for (;;) /* should never get here */ | |
411 | ; | |
412 | } | |
413 | ||
414 | ||
415 | static int __init prom_next_node(phandle *nodep) | |
416 | { | |
417 | phandle node; | |
418 | ||
419 | if ((node = *nodep) != 0 | |
420 | && (*nodep = call_prom("child", 1, 1, node)) != 0) | |
421 | return 1; | |
422 | if ((*nodep = call_prom("peer", 1, 1, node)) != 0) | |
423 | return 1; | |
424 | for (;;) { | |
425 | if ((node = call_prom("parent", 1, 1, node)) == 0) | |
426 | return 0; | |
427 | if ((*nodep = call_prom("peer", 1, 1, node)) != 0) | |
428 | return 1; | |
429 | } | |
430 | } | |
431 | ||
21fe3301 | 432 | static int inline prom_getprop(phandle node, const char *pname, |
9b6b563c PM |
433 | void *value, size_t valuelen) |
434 | { | |
435 | return call_prom("getprop", 4, 1, node, ADDR(pname), | |
436 | (u32)(unsigned long) value, (u32) valuelen); | |
437 | } | |
438 | ||
21fe3301 | 439 | static int inline prom_getproplen(phandle node, const char *pname) |
9b6b563c PM |
440 | { |
441 | return call_prom("getproplen", 2, 1, node, ADDR(pname)); | |
442 | } | |
443 | ||
a23414be | 444 | static void add_string(char **str, const char *q) |
9b6b563c | 445 | { |
a23414be PM |
446 | char *p = *str; |
447 | ||
448 | while (*q) | |
449 | *p++ = *q++; | |
450 | *p++ = ' '; | |
451 | *str = p; | |
452 | } | |
453 | ||
454 | static char *tohex(unsigned int x) | |
455 | { | |
456 | static char digits[] = "0123456789abcdef"; | |
457 | static char result[9]; | |
458 | int i; | |
459 | ||
460 | result[8] = 0; | |
461 | i = 8; | |
462 | do { | |
463 | --i; | |
464 | result[i] = digits[x & 0xf]; | |
465 | x >>= 4; | |
466 | } while (x != 0 && i > 0); | |
467 | return &result[i]; | |
468 | } | |
469 | ||
470 | static int __init prom_setprop(phandle node, const char *nodename, | |
471 | const char *pname, void *value, size_t valuelen) | |
472 | { | |
473 | char cmd[256], *p; | |
474 | ||
475 | if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL)) | |
476 | return call_prom("setprop", 4, 1, node, ADDR(pname), | |
477 | (u32)(unsigned long) value, (u32) valuelen); | |
478 | ||
479 | /* gah... setprop doesn't work on longtrail, have to use interpret */ | |
480 | p = cmd; | |
481 | add_string(&p, "dev"); | |
482 | add_string(&p, nodename); | |
483 | add_string(&p, tohex((u32)(unsigned long) value)); | |
484 | add_string(&p, tohex(valuelen)); | |
485 | add_string(&p, tohex(ADDR(pname))); | |
486 | add_string(&p, tohex(strlen(RELOC(pname)))); | |
487 | add_string(&p, "property"); | |
488 | *p = 0; | |
489 | return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd); | |
9b6b563c PM |
490 | } |
491 | ||
492 | /* We can't use the standard versions because of RELOC headaches. */ | |
493 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ | |
494 | || ('a' <= (c) && (c) <= 'f') \ | |
495 | || ('A' <= (c) && (c) <= 'F')) | |
496 | ||
497 | #define isdigit(c) ('0' <= (c) && (c) <= '9') | |
498 | #define islower(c) ('a' <= (c) && (c) <= 'z') | |
499 | #define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c)) | |
500 | ||
501 | unsigned long prom_strtoul(const char *cp, const char **endp) | |
502 | { | |
503 | unsigned long result = 0, base = 10, value; | |
504 | ||
505 | if (*cp == '0') { | |
506 | base = 8; | |
507 | cp++; | |
508 | if (toupper(*cp) == 'X') { | |
509 | cp++; | |
510 | base = 16; | |
511 | } | |
512 | } | |
513 | ||
514 | while (isxdigit(*cp) && | |
515 | (value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) { | |
516 | result = result * base + value; | |
517 | cp++; | |
518 | } | |
519 | ||
520 | if (endp) | |
521 | *endp = cp; | |
522 | ||
523 | return result; | |
524 | } | |
525 | ||
526 | unsigned long prom_memparse(const char *ptr, const char **retptr) | |
527 | { | |
528 | unsigned long ret = prom_strtoul(ptr, retptr); | |
529 | int shift = 0; | |
530 | ||
531 | /* | |
532 | * We can't use a switch here because GCC *may* generate a | |
533 | * jump table which won't work, because we're not running at | |
534 | * the address we're linked at. | |
535 | */ | |
536 | if ('G' == **retptr || 'g' == **retptr) | |
537 | shift = 30; | |
538 | ||
539 | if ('M' == **retptr || 'm' == **retptr) | |
540 | shift = 20; | |
541 | ||
542 | if ('K' == **retptr || 'k' == **retptr) | |
543 | shift = 10; | |
544 | ||
545 | if (shift) { | |
546 | ret <<= shift; | |
547 | (*retptr)++; | |
548 | } | |
549 | ||
550 | return ret; | |
551 | } | |
552 | ||
553 | /* | |
554 | * Early parsing of the command line passed to the kernel, used for | |
555 | * "mem=x" and the options that affect the iommu | |
556 | */ | |
557 | static void __init early_cmdline_parse(void) | |
558 | { | |
559 | struct prom_t *_prom = &RELOC(prom); | |
470407a8 | 560 | #ifdef CONFIG_PPC64 |
cc5d0189 | 561 | const char *opt; |
470407a8 | 562 | #endif |
cc5d0189 | 563 | char *p; |
9b6b563c PM |
564 | int l = 0; |
565 | ||
566 | RELOC(prom_cmd_line[0]) = 0; | |
567 | p = RELOC(prom_cmd_line); | |
568 | if ((long)_prom->chosen > 0) | |
569 | l = prom_getprop(_prom->chosen, "bootargs", p, COMMAND_LINE_SIZE-1); | |
570 | #ifdef CONFIG_CMDLINE | |
0e4aa9c2 | 571 | if (l <= 0 || p[0] == '\0') /* dbl check */ |
9b6b563c PM |
572 | strlcpy(RELOC(prom_cmd_line), |
573 | RELOC(CONFIG_CMDLINE), sizeof(prom_cmd_line)); | |
574 | #endif /* CONFIG_CMDLINE */ | |
575 | prom_printf("command line: %s\n", RELOC(prom_cmd_line)); | |
576 | ||
577 | #ifdef CONFIG_PPC64 | |
578 | opt = strstr(RELOC(prom_cmd_line), RELOC("iommu=")); | |
579 | if (opt) { | |
580 | prom_printf("iommu opt is: %s\n", opt); | |
581 | opt += 6; | |
582 | while (*opt && *opt == ' ') | |
583 | opt++; | |
584 | if (!strncmp(opt, RELOC("off"), 3)) | |
585 | RELOC(ppc64_iommu_off) = 1; | |
586 | else if (!strncmp(opt, RELOC("force"), 5)) | |
587 | RELOC(iommu_force_on) = 1; | |
588 | } | |
589 | #endif | |
9b6b563c PM |
590 | } |
591 | ||
592 | #ifdef CONFIG_PPC_PSERIES | |
593 | /* | |
f709bfac PM |
594 | * There are two methods for telling firmware what our capabilities are. |
595 | * Newer machines have an "ibm,client-architecture-support" method on the | |
596 | * root node. For older machines, we have to call the "process-elf-header" | |
597 | * method in the /packages/elf-loader node, passing it a fake 32-bit | |
598 | * ELF header containing a couple of PT_NOTE sections that contain | |
599 | * structures that contain various information. | |
9b6b563c | 600 | */ |
f709bfac PM |
601 | |
602 | /* | |
603 | * New method - extensible architecture description vector. | |
604 | * | |
605 | * Because the description vector contains a mix of byte and word | |
606 | * values, we declare it as an unsigned char array, and use this | |
607 | * macro to put word values in. | |
608 | */ | |
609 | #define W(x) ((x) >> 24) & 0xff, ((x) >> 16) & 0xff, \ | |
610 | ((x) >> 8) & 0xff, (x) & 0xff | |
611 | ||
612 | /* Option vector bits - generic bits in byte 1 */ | |
613 | #define OV_IGNORE 0x80 /* ignore this vector */ | |
614 | #define OV_CESSATION_POLICY 0x40 /* halt if unsupported option present*/ | |
615 | ||
616 | /* Option vector 1: processor architectures supported */ | |
617 | #define OV1_PPC_2_00 0x80 /* set if we support PowerPC 2.00 */ | |
618 | #define OV1_PPC_2_01 0x40 /* set if we support PowerPC 2.01 */ | |
619 | #define OV1_PPC_2_02 0x20 /* set if we support PowerPC 2.02 */ | |
620 | #define OV1_PPC_2_03 0x10 /* set if we support PowerPC 2.03 */ | |
621 | #define OV1_PPC_2_04 0x08 /* set if we support PowerPC 2.04 */ | |
622 | #define OV1_PPC_2_05 0x04 /* set if we support PowerPC 2.05 */ | |
623 | ||
624 | /* Option vector 2: Open Firmware options supported */ | |
625 | #define OV2_REAL_MODE 0x20 /* set if we want OF in real mode */ | |
626 | ||
627 | /* Option vector 3: processor options supported */ | |
628 | #define OV3_FP 0x80 /* floating point */ | |
629 | #define OV3_VMX 0x40 /* VMX/Altivec */ | |
630 | ||
631 | /* Option vector 5: PAPR/OF options supported */ | |
632 | #define OV5_LPAR 0x80 /* logical partitioning supported */ | |
633 | #define OV5_SPLPAR 0x40 /* shared-processor LPAR supported */ | |
634 | /* ibm,dynamic-reconfiguration-memory property supported */ | |
635 | #define OV5_DRCONF_MEMORY 0x20 | |
636 | #define OV5_LARGE_PAGES 0x10 /* large pages supported */ | |
637 | ||
638 | /* | |
639 | * The architecture vector has an array of PVR mask/value pairs, | |
640 | * followed by # option vectors - 1, followed by the option vectors. | |
641 | */ | |
642 | static unsigned char ibm_architecture_vec[] = { | |
643 | W(0xfffe0000), W(0x003a0000), /* POWER5/POWER5+ */ | |
03054d51 | 644 | W(0xffff0000), W(0x003e0000), /* POWER6 */ |
f709bfac PM |
645 | W(0xfffffffe), W(0x0f000001), /* all 2.04-compliant and earlier */ |
646 | 5 - 1, /* 5 option vectors */ | |
647 | ||
648 | /* option vector 1: processor architectures supported */ | |
649 | 3 - 1, /* length */ | |
650 | 0, /* don't ignore, don't halt */ | |
651 | OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 | | |
652 | OV1_PPC_2_04 | OV1_PPC_2_05, | |
653 | ||
654 | /* option vector 2: Open Firmware options supported */ | |
655 | 34 - 1, /* length */ | |
656 | OV2_REAL_MODE, | |
657 | 0, 0, | |
658 | W(0xffffffff), /* real_base */ | |
659 | W(0xffffffff), /* real_size */ | |
660 | W(0xffffffff), /* virt_base */ | |
661 | W(0xffffffff), /* virt_size */ | |
662 | W(0xffffffff), /* load_base */ | |
663 | W(64), /* 128MB min RMA */ | |
664 | W(0xffffffff), /* full client load */ | |
665 | 0, /* min RMA percentage of total RAM */ | |
666 | 48, /* max log_2(hash table size) */ | |
667 | ||
668 | /* option vector 3: processor options supported */ | |
669 | 3 - 1, /* length */ | |
670 | 0, /* don't ignore, don't halt */ | |
671 | OV3_FP | OV3_VMX, | |
672 | ||
673 | /* option vector 4: IBM PAPR implementation */ | |
674 | 2 - 1, /* length */ | |
675 | 0, /* don't halt */ | |
676 | ||
677 | /* option vector 5: PAPR/OF options */ | |
678 | 3 - 1, /* length */ | |
679 | 0, /* don't ignore, don't halt */ | |
680 | OV5_LPAR | OV5_SPLPAR | OV5_LARGE_PAGES, | |
681 | }; | |
682 | ||
683 | /* Old method - ELF header with PT_NOTE sections */ | |
9b6b563c PM |
684 | static struct fake_elf { |
685 | Elf32_Ehdr elfhdr; | |
686 | Elf32_Phdr phdr[2]; | |
687 | struct chrpnote { | |
688 | u32 namesz; | |
689 | u32 descsz; | |
690 | u32 type; | |
691 | char name[8]; /* "PowerPC" */ | |
692 | struct chrpdesc { | |
693 | u32 real_mode; | |
694 | u32 real_base; | |
695 | u32 real_size; | |
696 | u32 virt_base; | |
697 | u32 virt_size; | |
698 | u32 load_base; | |
699 | } chrpdesc; | |
700 | } chrpnote; | |
701 | struct rpanote { | |
702 | u32 namesz; | |
703 | u32 descsz; | |
704 | u32 type; | |
705 | char name[24]; /* "IBM,RPA-Client-Config" */ | |
706 | struct rpadesc { | |
707 | u32 lpar_affinity; | |
708 | u32 min_rmo_size; | |
709 | u32 min_rmo_percent; | |
710 | u32 max_pft_size; | |
711 | u32 splpar; | |
712 | u32 min_load; | |
713 | u32 new_mem_def; | |
714 | u32 ignore_me; | |
715 | } rpadesc; | |
716 | } rpanote; | |
717 | } fake_elf = { | |
718 | .elfhdr = { | |
719 | .e_ident = { 0x7f, 'E', 'L', 'F', | |
720 | ELFCLASS32, ELFDATA2MSB, EV_CURRENT }, | |
721 | .e_type = ET_EXEC, /* yeah right */ | |
722 | .e_machine = EM_PPC, | |
723 | .e_version = EV_CURRENT, | |
724 | .e_phoff = offsetof(struct fake_elf, phdr), | |
725 | .e_phentsize = sizeof(Elf32_Phdr), | |
726 | .e_phnum = 2 | |
727 | }, | |
728 | .phdr = { | |
729 | [0] = { | |
730 | .p_type = PT_NOTE, | |
731 | .p_offset = offsetof(struct fake_elf, chrpnote), | |
732 | .p_filesz = sizeof(struct chrpnote) | |
733 | }, [1] = { | |
734 | .p_type = PT_NOTE, | |
735 | .p_offset = offsetof(struct fake_elf, rpanote), | |
736 | .p_filesz = sizeof(struct rpanote) | |
737 | } | |
738 | }, | |
739 | .chrpnote = { | |
740 | .namesz = sizeof("PowerPC"), | |
741 | .descsz = sizeof(struct chrpdesc), | |
742 | .type = 0x1275, | |
743 | .name = "PowerPC", | |
744 | .chrpdesc = { | |
745 | .real_mode = ~0U, /* ~0 means "don't care" */ | |
746 | .real_base = ~0U, | |
747 | .real_size = ~0U, | |
748 | .virt_base = ~0U, | |
749 | .virt_size = ~0U, | |
750 | .load_base = ~0U | |
751 | }, | |
752 | }, | |
753 | .rpanote = { | |
754 | .namesz = sizeof("IBM,RPA-Client-Config"), | |
755 | .descsz = sizeof(struct rpadesc), | |
756 | .type = 0x12759999, | |
757 | .name = "IBM,RPA-Client-Config", | |
758 | .rpadesc = { | |
759 | .lpar_affinity = 0, | |
760 | .min_rmo_size = 64, /* in megabytes */ | |
761 | .min_rmo_percent = 0, | |
762 | .max_pft_size = 48, /* 2^48 bytes max PFT size */ | |
763 | .splpar = 1, | |
764 | .min_load = ~0U, | |
765 | .new_mem_def = 0 | |
766 | } | |
767 | } | |
768 | }; | |
769 | ||
770 | static void __init prom_send_capabilities(void) | |
771 | { | |
f709bfac PM |
772 | ihandle elfloader, root; |
773 | prom_arg_t ret; | |
774 | ||
775 | root = call_prom("open", 1, 1, ADDR("/")); | |
776 | if (root != 0) { | |
777 | /* try calling the ibm,client-architecture-support method */ | |
778 | if (call_prom_ret("call-method", 3, 2, &ret, | |
779 | ADDR("ibm,client-architecture-support"), | |
33b74977 | 780 | root, |
f709bfac PM |
781 | ADDR(ibm_architecture_vec)) == 0) { |
782 | /* the call exists... */ | |
783 | if (ret) | |
784 | prom_printf("WARNING: ibm,client-architecture" | |
785 | "-support call FAILED!\n"); | |
786 | call_prom("close", 1, 0, root); | |
787 | return; | |
788 | } | |
789 | call_prom("close", 1, 0, root); | |
790 | } | |
9b6b563c | 791 | |
f709bfac | 792 | /* no ibm,client-architecture-support call, try the old way */ |
9b6b563c PM |
793 | elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader")); |
794 | if (elfloader == 0) { | |
795 | prom_printf("couldn't open /packages/elf-loader\n"); | |
796 | return; | |
797 | } | |
798 | call_prom("call-method", 3, 1, ADDR("process-elf-header"), | |
799 | elfloader, ADDR(&fake_elf)); | |
800 | call_prom("close", 1, 0, elfloader); | |
801 | } | |
802 | #endif | |
803 | ||
804 | /* | |
805 | * Memory allocation strategy... our layout is normally: | |
806 | * | |
807 | * at 14Mb or more we have vmlinux, then a gap and initrd. In some | |
808 | * rare cases, initrd might end up being before the kernel though. | |
809 | * We assume this won't override the final kernel at 0, we have no | |
810 | * provision to handle that in this version, but it should hopefully | |
811 | * never happen. | |
812 | * | |
813 | * alloc_top is set to the top of RMO, eventually shrink down if the | |
814 | * TCEs overlap | |
815 | * | |
816 | * alloc_bottom is set to the top of kernel/initrd | |
817 | * | |
818 | * from there, allocations are done this way : rtas is allocated | |
819 | * topmost, and the device-tree is allocated from the bottom. We try | |
820 | * to grow the device-tree allocation as we progress. If we can't, | |
821 | * then we fail, we don't currently have a facility to restart | |
822 | * elsewhere, but that shouldn't be necessary. | |
823 | * | |
824 | * Note that calls to reserve_mem have to be done explicitly, memory | |
825 | * allocated with either alloc_up or alloc_down isn't automatically | |
826 | * reserved. | |
827 | */ | |
828 | ||
829 | ||
830 | /* | |
831 | * Allocates memory in the RMO upward from the kernel/initrd | |
832 | * | |
833 | * When align is 0, this is a special case, it means to allocate in place | |
834 | * at the current location of alloc_bottom or fail (that is basically | |
835 | * extending the previous allocation). Used for the device-tree flattening | |
836 | */ | |
837 | static unsigned long __init alloc_up(unsigned long size, unsigned long align) | |
838 | { | |
c4988820 | 839 | unsigned long base = RELOC(alloc_bottom); |
9b6b563c PM |
840 | unsigned long addr = 0; |
841 | ||
c4988820 PM |
842 | if (align) |
843 | base = _ALIGN_UP(base, align); | |
9b6b563c PM |
844 | prom_debug("alloc_up(%x, %x)\n", size, align); |
845 | if (RELOC(ram_top) == 0) | |
846 | prom_panic("alloc_up() called with mem not initialized\n"); | |
847 | ||
848 | if (align) | |
849 | base = _ALIGN_UP(RELOC(alloc_bottom), align); | |
850 | else | |
851 | base = RELOC(alloc_bottom); | |
852 | ||
853 | for(; (base + size) <= RELOC(alloc_top); | |
854 | base = _ALIGN_UP(base + 0x100000, align)) { | |
855 | prom_debug(" trying: 0x%x\n\r", base); | |
856 | addr = (unsigned long)prom_claim(base, size, 0); | |
c4988820 | 857 | if (addr != PROM_ERROR && addr != 0) |
9b6b563c PM |
858 | break; |
859 | addr = 0; | |
860 | if (align == 0) | |
861 | break; | |
862 | } | |
863 | if (addr == 0) | |
864 | return 0; | |
865 | RELOC(alloc_bottom) = addr; | |
866 | ||
867 | prom_debug(" -> %x\n", addr); | |
868 | prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom)); | |
869 | prom_debug(" alloc_top : %x\n", RELOC(alloc_top)); | |
870 | prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); | |
871 | prom_debug(" rmo_top : %x\n", RELOC(rmo_top)); | |
872 | prom_debug(" ram_top : %x\n", RELOC(ram_top)); | |
873 | ||
874 | return addr; | |
875 | } | |
876 | ||
877 | /* | |
878 | * Allocates memory downward, either from top of RMO, or if highmem | |
879 | * is set, from the top of RAM. Note that this one doesn't handle | |
880 | * failures. It does claim memory if highmem is not set. | |
881 | */ | |
882 | static unsigned long __init alloc_down(unsigned long size, unsigned long align, | |
883 | int highmem) | |
884 | { | |
885 | unsigned long base, addr = 0; | |
886 | ||
887 | prom_debug("alloc_down(%x, %x, %s)\n", size, align, | |
888 | highmem ? RELOC("(high)") : RELOC("(low)")); | |
889 | if (RELOC(ram_top) == 0) | |
890 | prom_panic("alloc_down() called with mem not initialized\n"); | |
891 | ||
892 | if (highmem) { | |
893 | /* Carve out storage for the TCE table. */ | |
894 | addr = _ALIGN_DOWN(RELOC(alloc_top_high) - size, align); | |
895 | if (addr <= RELOC(alloc_bottom)) | |
896 | return 0; | |
897 | /* Will we bump into the RMO ? If yes, check out that we | |
898 | * didn't overlap existing allocations there, if we did, | |
899 | * we are dead, we must be the first in town ! | |
900 | */ | |
901 | if (addr < RELOC(rmo_top)) { | |
902 | /* Good, we are first */ | |
903 | if (RELOC(alloc_top) == RELOC(rmo_top)) | |
904 | RELOC(alloc_top) = RELOC(rmo_top) = addr; | |
905 | else | |
906 | return 0; | |
907 | } | |
908 | RELOC(alloc_top_high) = addr; | |
909 | goto bail; | |
910 | } | |
911 | ||
912 | base = _ALIGN_DOWN(RELOC(alloc_top) - size, align); | |
913 | for (; base > RELOC(alloc_bottom); | |
914 | base = _ALIGN_DOWN(base - 0x100000, align)) { | |
915 | prom_debug(" trying: 0x%x\n\r", base); | |
916 | addr = (unsigned long)prom_claim(base, size, 0); | |
c4988820 | 917 | if (addr != PROM_ERROR && addr != 0) |
9b6b563c PM |
918 | break; |
919 | addr = 0; | |
920 | } | |
921 | if (addr == 0) | |
922 | return 0; | |
923 | RELOC(alloc_top) = addr; | |
924 | ||
925 | bail: | |
926 | prom_debug(" -> %x\n", addr); | |
927 | prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom)); | |
928 | prom_debug(" alloc_top : %x\n", RELOC(alloc_top)); | |
929 | prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); | |
930 | prom_debug(" rmo_top : %x\n", RELOC(rmo_top)); | |
931 | prom_debug(" ram_top : %x\n", RELOC(ram_top)); | |
932 | ||
933 | return addr; | |
934 | } | |
935 | ||
936 | /* | |
937 | * Parse a "reg" cell | |
938 | */ | |
939 | static unsigned long __init prom_next_cell(int s, cell_t **cellp) | |
940 | { | |
941 | cell_t *p = *cellp; | |
942 | unsigned long r = 0; | |
943 | ||
944 | /* Ignore more than 2 cells */ | |
945 | while (s > sizeof(unsigned long) / 4) { | |
946 | p++; | |
947 | s--; | |
948 | } | |
949 | r = *p++; | |
950 | #ifdef CONFIG_PPC64 | |
35499c01 | 951 | if (s > 1) { |
9b6b563c PM |
952 | r <<= 32; |
953 | r |= *(p++); | |
954 | } | |
955 | #endif | |
956 | *cellp = p; | |
957 | return r; | |
958 | } | |
959 | ||
960 | /* | |
961 | * Very dumb function for adding to the memory reserve list, but | |
962 | * we don't need anything smarter at this point | |
963 | * | |
964 | * XXX Eventually check for collisions. They should NEVER happen. | |
965 | * If problems seem to show up, it would be a good start to track | |
966 | * them down. | |
967 | */ | |
cbbcf340 | 968 | static void reserve_mem(u64 base, u64 size) |
9b6b563c | 969 | { |
cbbcf340 | 970 | u64 top = base + size; |
9b6b563c PM |
971 | unsigned long cnt = RELOC(mem_reserve_cnt); |
972 | ||
973 | if (size == 0) | |
974 | return; | |
975 | ||
976 | /* We need to always keep one empty entry so that we | |
977 | * have our terminator with "size" set to 0 since we are | |
978 | * dumb and just copy this entire array to the boot params | |
979 | */ | |
980 | base = _ALIGN_DOWN(base, PAGE_SIZE); | |
981 | top = _ALIGN_UP(top, PAGE_SIZE); | |
982 | size = top - base; | |
983 | ||
984 | if (cnt >= (MEM_RESERVE_MAP_SIZE - 1)) | |
985 | prom_panic("Memory reserve map exhausted !\n"); | |
986 | RELOC(mem_reserve_map)[cnt].base = base; | |
987 | RELOC(mem_reserve_map)[cnt].size = size; | |
988 | RELOC(mem_reserve_cnt) = cnt + 1; | |
989 | } | |
990 | ||
991 | /* | |
b3c2ffd5 | 992 | * Initialize memory allocation mechanism, parse "memory" nodes and |
9b6b563c PM |
993 | * obtain that way the top of memory and RMO to setup out local allocator |
994 | */ | |
995 | static void __init prom_init_mem(void) | |
996 | { | |
997 | phandle node; | |
998 | char *path, type[64]; | |
999 | unsigned int plen; | |
1000 | cell_t *p, *endp; | |
1001 | struct prom_t *_prom = &RELOC(prom); | |
1002 | u32 rac, rsc; | |
1003 | ||
1004 | /* | |
1005 | * We iterate the memory nodes to find | |
1006 | * 1) top of RMO (first node) | |
1007 | * 2) top of memory | |
1008 | */ | |
1009 | rac = 2; | |
1010 | prom_getprop(_prom->root, "#address-cells", &rac, sizeof(rac)); | |
1011 | rsc = 1; | |
1012 | prom_getprop(_prom->root, "#size-cells", &rsc, sizeof(rsc)); | |
1013 | prom_debug("root_addr_cells: %x\n", (unsigned long) rac); | |
1014 | prom_debug("root_size_cells: %x\n", (unsigned long) rsc); | |
1015 | ||
1016 | prom_debug("scanning memory:\n"); | |
1017 | path = RELOC(prom_scratch); | |
1018 | ||
1019 | for (node = 0; prom_next_node(&node); ) { | |
1020 | type[0] = 0; | |
1021 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1022 | ||
c4988820 PM |
1023 | if (type[0] == 0) { |
1024 | /* | |
1025 | * CHRP Longtrail machines have no device_type | |
1026 | * on the memory node, so check the name instead... | |
1027 | */ | |
1028 | prom_getprop(node, "name", type, sizeof(type)); | |
1029 | } | |
9b6b563c PM |
1030 | if (strcmp(type, RELOC("memory"))) |
1031 | continue; | |
c4988820 | 1032 | |
9b6b563c PM |
1033 | plen = prom_getprop(node, "reg", RELOC(regbuf), sizeof(regbuf)); |
1034 | if (plen > sizeof(regbuf)) { | |
1035 | prom_printf("memory node too large for buffer !\n"); | |
1036 | plen = sizeof(regbuf); | |
1037 | } | |
1038 | p = RELOC(regbuf); | |
1039 | endp = p + (plen / sizeof(cell_t)); | |
1040 | ||
1041 | #ifdef DEBUG_PROM | |
1042 | memset(path, 0, PROM_SCRATCH_SIZE); | |
1043 | call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); | |
1044 | prom_debug(" node %s :\n", path); | |
1045 | #endif /* DEBUG_PROM */ | |
1046 | ||
1047 | while ((endp - p) >= (rac + rsc)) { | |
1048 | unsigned long base, size; | |
1049 | ||
1050 | base = prom_next_cell(rac, &p); | |
1051 | size = prom_next_cell(rsc, &p); | |
1052 | ||
1053 | if (size == 0) | |
1054 | continue; | |
1055 | prom_debug(" %x %x\n", base, size); | |
ab1b55e2 | 1056 | if (base == 0 && (RELOC(of_platform) & PLATFORM_LPAR)) |
9b6b563c PM |
1057 | RELOC(rmo_top) = size; |
1058 | if ((base + size) > RELOC(ram_top)) | |
1059 | RELOC(ram_top) = base + size; | |
1060 | } | |
1061 | } | |
1062 | ||
1063 | RELOC(alloc_bottom) = PAGE_ALIGN((unsigned long)&RELOC(_end) + 0x4000); | |
1064 | ||
1065 | /* Check if we have an initrd after the kernel, if we do move our bottom | |
1066 | * point to after it | |
1067 | */ | |
1068 | if (RELOC(prom_initrd_start)) { | |
1069 | if (RELOC(prom_initrd_end) > RELOC(alloc_bottom)) | |
1070 | RELOC(alloc_bottom) = PAGE_ALIGN(RELOC(prom_initrd_end)); | |
1071 | } | |
1072 | ||
9b6b563c PM |
1073 | /* |
1074 | * Setup our top alloc point, that is top of RMO or top of | |
1075 | * segment 0 when running non-LPAR. | |
1076 | * Some RS64 machines have buggy firmware where claims up at | |
1077 | * 1GB fail. Cap at 768MB as a workaround. | |
1078 | * Since 768MB is plenty of room, and we need to cap to something | |
1079 | * reasonable on 32-bit, cap at 768MB on all machines. | |
1080 | */ | |
1081 | if (!RELOC(rmo_top)) | |
1082 | RELOC(rmo_top) = RELOC(ram_top); | |
1083 | RELOC(rmo_top) = min(0x30000000ul, RELOC(rmo_top)); | |
1084 | RELOC(alloc_top) = RELOC(rmo_top); | |
2babf5c2 | 1085 | RELOC(alloc_top_high) = RELOC(ram_top); |
9b6b563c PM |
1086 | |
1087 | prom_printf("memory layout at init:\n"); | |
9b6b563c PM |
1088 | prom_printf(" alloc_bottom : %x\n", RELOC(alloc_bottom)); |
1089 | prom_printf(" alloc_top : %x\n", RELOC(alloc_top)); | |
1090 | prom_printf(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); | |
1091 | prom_printf(" rmo_top : %x\n", RELOC(rmo_top)); | |
1092 | prom_printf(" ram_top : %x\n", RELOC(ram_top)); | |
1093 | } | |
1094 | ||
1095 | ||
1096 | /* | |
1097 | * Allocate room for and instantiate RTAS | |
1098 | */ | |
1099 | static void __init prom_instantiate_rtas(void) | |
1100 | { | |
1101 | phandle rtas_node; | |
1102 | ihandle rtas_inst; | |
1103 | u32 base, entry = 0; | |
1104 | u32 size = 0; | |
1105 | ||
1106 | prom_debug("prom_instantiate_rtas: start...\n"); | |
1107 | ||
1108 | rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas")); | |
1109 | prom_debug("rtas_node: %x\n", rtas_node); | |
1110 | if (!PHANDLE_VALID(rtas_node)) | |
1111 | return; | |
1112 | ||
1113 | prom_getprop(rtas_node, "rtas-size", &size, sizeof(size)); | |
1114 | if (size == 0) | |
1115 | return; | |
1116 | ||
1117 | base = alloc_down(size, PAGE_SIZE, 0); | |
1118 | if (base == 0) { | |
1119 | prom_printf("RTAS allocation failed !\n"); | |
1120 | return; | |
1121 | } | |
1122 | ||
1123 | rtas_inst = call_prom("open", 1, 1, ADDR("/rtas")); | |
1124 | if (!IHANDLE_VALID(rtas_inst)) { | |
a23414be | 1125 | prom_printf("opening rtas package failed (%x)\n", rtas_inst); |
9b6b563c PM |
1126 | return; |
1127 | } | |
1128 | ||
1129 | prom_printf("instantiating rtas at 0x%x ...", base); | |
1130 | ||
1131 | if (call_prom_ret("call-method", 3, 2, &entry, | |
1132 | ADDR("instantiate-rtas"), | |
a23414be | 1133 | rtas_inst, base) != 0 |
9b6b563c PM |
1134 | || entry == 0) { |
1135 | prom_printf(" failed\n"); | |
1136 | return; | |
1137 | } | |
1138 | prom_printf(" done\n"); | |
1139 | ||
1140 | reserve_mem(base, size); | |
1141 | ||
a23414be PM |
1142 | prom_setprop(rtas_node, "/rtas", "linux,rtas-base", |
1143 | &base, sizeof(base)); | |
1144 | prom_setprop(rtas_node, "/rtas", "linux,rtas-entry", | |
1145 | &entry, sizeof(entry)); | |
9b6b563c PM |
1146 | |
1147 | prom_debug("rtas base = 0x%x\n", base); | |
1148 | prom_debug("rtas entry = 0x%x\n", entry); | |
1149 | prom_debug("rtas size = 0x%x\n", (long)size); | |
1150 | ||
1151 | prom_debug("prom_instantiate_rtas: end...\n"); | |
1152 | } | |
1153 | ||
1154 | #ifdef CONFIG_PPC64 | |
1155 | /* | |
1156 | * Allocate room for and initialize TCE tables | |
1157 | */ | |
1158 | static void __init prom_initialize_tce_table(void) | |
1159 | { | |
1160 | phandle node; | |
1161 | ihandle phb_node; | |
1162 | char compatible[64], type[64], model[64]; | |
1163 | char *path = RELOC(prom_scratch); | |
1164 | u64 base, align; | |
1165 | u32 minalign, minsize; | |
1166 | u64 tce_entry, *tce_entryp; | |
1167 | u64 local_alloc_top, local_alloc_bottom; | |
1168 | u64 i; | |
1169 | ||
1170 | if (RELOC(ppc64_iommu_off)) | |
1171 | return; | |
1172 | ||
1173 | prom_debug("starting prom_initialize_tce_table\n"); | |
1174 | ||
1175 | /* Cache current top of allocs so we reserve a single block */ | |
1176 | local_alloc_top = RELOC(alloc_top_high); | |
1177 | local_alloc_bottom = local_alloc_top; | |
1178 | ||
1179 | /* Search all nodes looking for PHBs. */ | |
1180 | for (node = 0; prom_next_node(&node); ) { | |
1181 | compatible[0] = 0; | |
1182 | type[0] = 0; | |
1183 | model[0] = 0; | |
1184 | prom_getprop(node, "compatible", | |
1185 | compatible, sizeof(compatible)); | |
1186 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1187 | prom_getprop(node, "model", model, sizeof(model)); | |
1188 | ||
1189 | if ((type[0] == 0) || (strstr(type, RELOC("pci")) == NULL)) | |
1190 | continue; | |
1191 | ||
1192 | /* Keep the old logic in tack to avoid regression. */ | |
1193 | if (compatible[0] != 0) { | |
1194 | if ((strstr(compatible, RELOC("python")) == NULL) && | |
1195 | (strstr(compatible, RELOC("Speedwagon")) == NULL) && | |
1196 | (strstr(compatible, RELOC("Winnipeg")) == NULL)) | |
1197 | continue; | |
1198 | } else if (model[0] != 0) { | |
1199 | if ((strstr(model, RELOC("ython")) == NULL) && | |
1200 | (strstr(model, RELOC("peedwagon")) == NULL) && | |
1201 | (strstr(model, RELOC("innipeg")) == NULL)) | |
1202 | continue; | |
1203 | } | |
1204 | ||
1205 | if (prom_getprop(node, "tce-table-minalign", &minalign, | |
1206 | sizeof(minalign)) == PROM_ERROR) | |
1207 | minalign = 0; | |
1208 | if (prom_getprop(node, "tce-table-minsize", &minsize, | |
1209 | sizeof(minsize)) == PROM_ERROR) | |
1210 | minsize = 4UL << 20; | |
1211 | ||
1212 | /* | |
1213 | * Even though we read what OF wants, we just set the table | |
1214 | * size to 4 MB. This is enough to map 2GB of PCI DMA space. | |
1215 | * By doing this, we avoid the pitfalls of trying to DMA to | |
1216 | * MMIO space and the DMA alias hole. | |
1217 | * | |
1218 | * On POWER4, firmware sets the TCE region by assuming | |
1219 | * each TCE table is 8MB. Using this memory for anything | |
1220 | * else will impact performance, so we always allocate 8MB. | |
1221 | * Anton | |
1222 | */ | |
1223 | if (__is_processor(PV_POWER4) || __is_processor(PV_POWER4p)) | |
1224 | minsize = 8UL << 20; | |
1225 | else | |
1226 | minsize = 4UL << 20; | |
1227 | ||
1228 | /* Align to the greater of the align or size */ | |
1229 | align = max(minalign, minsize); | |
1230 | base = alloc_down(minsize, align, 1); | |
1231 | if (base == 0) | |
1232 | prom_panic("ERROR, cannot find space for TCE table.\n"); | |
1233 | if (base < local_alloc_bottom) | |
1234 | local_alloc_bottom = base; | |
1235 | ||
9b6b563c PM |
1236 | /* It seems OF doesn't null-terminate the path :-( */ |
1237 | memset(path, 0, sizeof(path)); | |
1238 | /* Call OF to setup the TCE hardware */ | |
1239 | if (call_prom("package-to-path", 3, 1, node, | |
1240 | path, PROM_SCRATCH_SIZE-1) == PROM_ERROR) { | |
1241 | prom_printf("package-to-path failed\n"); | |
1242 | } | |
1243 | ||
a23414be PM |
1244 | /* Save away the TCE table attributes for later use. */ |
1245 | prom_setprop(node, path, "linux,tce-base", &base, sizeof(base)); | |
1246 | prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize)); | |
1247 | ||
9b6b563c PM |
1248 | prom_debug("TCE table: %s\n", path); |
1249 | prom_debug("\tnode = 0x%x\n", node); | |
1250 | prom_debug("\tbase = 0x%x\n", base); | |
1251 | prom_debug("\tsize = 0x%x\n", minsize); | |
1252 | ||
1253 | /* Initialize the table to have a one-to-one mapping | |
1254 | * over the allocated size. | |
1255 | */ | |
1256 | tce_entryp = (unsigned long *)base; | |
1257 | for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) { | |
1258 | tce_entry = (i << PAGE_SHIFT); | |
1259 | tce_entry |= 0x3; | |
1260 | *tce_entryp = tce_entry; | |
1261 | } | |
1262 | ||
1263 | prom_printf("opening PHB %s", path); | |
1264 | phb_node = call_prom("open", 1, 1, path); | |
1265 | if (phb_node == 0) | |
1266 | prom_printf("... failed\n"); | |
1267 | else | |
1268 | prom_printf("... done\n"); | |
1269 | ||
1270 | call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"), | |
1271 | phb_node, -1, minsize, | |
1272 | (u32) base, (u32) (base >> 32)); | |
1273 | call_prom("close", 1, 0, phb_node); | |
1274 | } | |
1275 | ||
1276 | reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom); | |
1277 | ||
2babf5c2 ME |
1278 | /* These are only really needed if there is a memory limit in |
1279 | * effect, but we don't know so export them always. */ | |
1280 | RELOC(prom_tce_alloc_start) = local_alloc_bottom; | |
1281 | RELOC(prom_tce_alloc_end) = local_alloc_top; | |
9b6b563c PM |
1282 | |
1283 | /* Flag the first invalid entry */ | |
1284 | prom_debug("ending prom_initialize_tce_table\n"); | |
1285 | } | |
1286 | #endif | |
1287 | ||
1288 | /* | |
1289 | * With CHRP SMP we need to use the OF to start the other processors. | |
1290 | * We can't wait until smp_boot_cpus (the OF is trashed by then) | |
1291 | * so we have to put the processors into a holding pattern controlled | |
1292 | * by the kernel (not OF) before we destroy the OF. | |
1293 | * | |
1294 | * This uses a chunk of low memory, puts some holding pattern | |
1295 | * code there and sends the other processors off to there until | |
1296 | * smp_boot_cpus tells them to do something. The holding pattern | |
1297 | * checks that address until its cpu # is there, when it is that | |
1298 | * cpu jumps to __secondary_start(). smp_boot_cpus() takes care | |
1299 | * of setting those values. | |
1300 | * | |
1301 | * We also use physical address 0x4 here to tell when a cpu | |
1302 | * is in its holding pattern code. | |
1303 | * | |
1304 | * -- Cort | |
1305 | */ | |
bbd0abda PM |
1306 | extern void __secondary_hold(void); |
1307 | extern unsigned long __secondary_hold_spinloop; | |
1308 | extern unsigned long __secondary_hold_acknowledge; | |
1309 | ||
1310 | /* | |
1311 | * We want to reference the copy of __secondary_hold_* in the | |
1312 | * 0 - 0x100 address range | |
1313 | */ | |
1314 | #define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff) | |
1315 | ||
9b6b563c PM |
1316 | static void __init prom_hold_cpus(void) |
1317 | { | |
9b6b563c PM |
1318 | unsigned long i; |
1319 | unsigned int reg; | |
1320 | phandle node; | |
1321 | char type[64]; | |
1322 | int cpuid = 0; | |
1323 | unsigned int interrupt_server[MAX_CPU_THREADS]; | |
1324 | unsigned int cpu_threads, hw_cpu_num; | |
1325 | int propsize; | |
bbd0abda | 1326 | struct prom_t *_prom = &RELOC(prom); |
9b6b563c | 1327 | unsigned long *spinloop |
bbd0abda | 1328 | = (void *) LOW_ADDR(__secondary_hold_spinloop); |
9b6b563c | 1329 | unsigned long *acknowledge |
bbd0abda | 1330 | = (void *) LOW_ADDR(__secondary_hold_acknowledge); |
9b6b563c | 1331 | #ifdef CONFIG_PPC64 |
bbd0abda | 1332 | /* __secondary_hold is actually a descriptor, not the text address */ |
9b6b563c PM |
1333 | unsigned long secondary_hold |
1334 | = __pa(*PTRRELOC((unsigned long *)__secondary_hold)); | |
1335 | #else | |
bbd0abda | 1336 | unsigned long secondary_hold = LOW_ADDR(__secondary_hold); |
9b6b563c | 1337 | #endif |
9b6b563c PM |
1338 | |
1339 | prom_debug("prom_hold_cpus: start...\n"); | |
1340 | prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop); | |
1341 | prom_debug(" 1) *spinloop = 0x%x\n", *spinloop); | |
1342 | prom_debug(" 1) acknowledge = 0x%x\n", | |
1343 | (unsigned long)acknowledge); | |
1344 | prom_debug(" 1) *acknowledge = 0x%x\n", *acknowledge); | |
1345 | prom_debug(" 1) secondary_hold = 0x%x\n", secondary_hold); | |
1346 | ||
1347 | /* Set the common spinloop variable, so all of the secondary cpus | |
1348 | * will block when they are awakened from their OF spinloop. | |
1349 | * This must occur for both SMP and non SMP kernels, since OF will | |
1350 | * be trashed when we move the kernel. | |
1351 | */ | |
1352 | *spinloop = 0; | |
1353 | ||
9b6b563c PM |
1354 | /* look for cpus */ |
1355 | for (node = 0; prom_next_node(&node); ) { | |
1356 | type[0] = 0; | |
1357 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1358 | if (strcmp(type, RELOC("cpu")) != 0) | |
1359 | continue; | |
1360 | ||
1361 | /* Skip non-configured cpus. */ | |
1362 | if (prom_getprop(node, "status", type, sizeof(type)) > 0) | |
1363 | if (strcmp(type, RELOC("okay")) != 0) | |
1364 | continue; | |
1365 | ||
1366 | reg = -1; | |
1367 | prom_getprop(node, "reg", ®, sizeof(reg)); | |
1368 | ||
1369 | prom_debug("\ncpuid = 0x%x\n", cpuid); | |
1370 | prom_debug("cpu hw idx = 0x%x\n", reg); | |
1371 | ||
1372 | /* Init the acknowledge var which will be reset by | |
1373 | * the secondary cpu when it awakens from its OF | |
1374 | * spinloop. | |
1375 | */ | |
1376 | *acknowledge = (unsigned long)-1; | |
1377 | ||
1378 | propsize = prom_getprop(node, "ibm,ppc-interrupt-server#s", | |
1379 | &interrupt_server, | |
1380 | sizeof(interrupt_server)); | |
1381 | if (propsize < 0) { | |
1382 | /* no property. old hardware has no SMT */ | |
1383 | cpu_threads = 1; | |
1384 | interrupt_server[0] = reg; /* fake it with phys id */ | |
1385 | } else { | |
1386 | /* We have a threaded processor */ | |
1387 | cpu_threads = propsize / sizeof(u32); | |
1388 | if (cpu_threads > MAX_CPU_THREADS) { | |
1389 | prom_printf("SMT: too many threads!\n" | |
1390 | "SMT: found %x, max is %x\n", | |
1391 | cpu_threads, MAX_CPU_THREADS); | |
1392 | cpu_threads = 1; /* ToDo: panic? */ | |
1393 | } | |
1394 | } | |
1395 | ||
1396 | hw_cpu_num = interrupt_server[0]; | |
1397 | if (hw_cpu_num != _prom->cpu) { | |
1398 | /* Primary Thread of non-boot cpu */ | |
1399 | prom_printf("%x : starting cpu hw idx %x... ", cpuid, reg); | |
1400 | call_prom("start-cpu", 3, 0, node, | |
1401 | secondary_hold, reg); | |
1402 | ||
bbd0abda PM |
1403 | for (i = 0; (i < 100000000) && |
1404 | (*acknowledge == ((unsigned long)-1)); i++ ) | |
9b6b563c PM |
1405 | mb(); |
1406 | ||
bbd0abda | 1407 | if (*acknowledge == reg) |
9b6b563c | 1408 | prom_printf("done\n"); |
bbd0abda | 1409 | else |
9b6b563c | 1410 | prom_printf("failed: %x\n", *acknowledge); |
9b6b563c PM |
1411 | } |
1412 | #ifdef CONFIG_SMP | |
1413 | else | |
1414 | prom_printf("%x : boot cpu %x\n", cpuid, reg); | |
9b6b563c | 1415 | #endif /* CONFIG_SMP */ |
bbd0abda PM |
1416 | |
1417 | /* Reserve cpu #s for secondary threads. They start later. */ | |
1418 | cpuid += cpu_threads; | |
9b6b563c | 1419 | } |
9b6b563c PM |
1420 | |
1421 | if (cpuid > NR_CPUS) | |
1422 | prom_printf("WARNING: maximum CPUs (" __stringify(NR_CPUS) | |
1423 | ") exceeded: ignoring extras\n"); | |
1424 | ||
1425 | prom_debug("prom_hold_cpus: end...\n"); | |
9b6b563c PM |
1426 | } |
1427 | ||
1428 | ||
1429 | static void __init prom_init_client_services(unsigned long pp) | |
1430 | { | |
1431 | struct prom_t *_prom = &RELOC(prom); | |
1432 | ||
1433 | /* Get a handle to the prom entry point before anything else */ | |
1434 | RELOC(prom_entry) = pp; | |
1435 | ||
1436 | /* get a handle for the stdout device */ | |
1437 | _prom->chosen = call_prom("finddevice", 1, 1, ADDR("/chosen")); | |
1438 | if (!PHANDLE_VALID(_prom->chosen)) | |
1439 | prom_panic("cannot find chosen"); /* msg won't be printed :( */ | |
1440 | ||
1441 | /* get device tree root */ | |
1442 | _prom->root = call_prom("finddevice", 1, 1, ADDR("/")); | |
1443 | if (!PHANDLE_VALID(_prom->root)) | |
1444 | prom_panic("cannot find device tree root"); /* msg won't be printed :( */ | |
a575b807 PM |
1445 | |
1446 | _prom->mmumap = 0; | |
1447 | } | |
1448 | ||
1449 | #ifdef CONFIG_PPC32 | |
1450 | /* | |
1451 | * For really old powermacs, we need to map things we claim. | |
1452 | * For that, we need the ihandle of the mmu. | |
a23414be | 1453 | * Also, on the longtrail, we need to work around other bugs. |
a575b807 PM |
1454 | */ |
1455 | static void __init prom_find_mmu(void) | |
1456 | { | |
1457 | struct prom_t *_prom = &RELOC(prom); | |
1458 | phandle oprom; | |
1459 | char version[64]; | |
1460 | ||
1461 | oprom = call_prom("finddevice", 1, 1, ADDR("/openprom")); | |
1462 | if (!PHANDLE_VALID(oprom)) | |
1463 | return; | |
1464 | if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0) | |
1465 | return; | |
1466 | version[sizeof(version) - 1] = 0; | |
a575b807 | 1467 | /* XXX might need to add other versions here */ |
a23414be PM |
1468 | if (strcmp(version, "Open Firmware, 1.0.5") == 0) |
1469 | of_workarounds = OF_WA_CLAIM; | |
1470 | else if (strncmp(version, "FirmWorks,3.", 12) == 0) { | |
1471 | of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL; | |
1472 | call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim"); | |
1473 | } else | |
a575b807 | 1474 | return; |
a23414be | 1475 | _prom->memory = call_prom("open", 1, 1, ADDR("/memory")); |
a575b807 PM |
1476 | prom_getprop(_prom->chosen, "mmu", &_prom->mmumap, |
1477 | sizeof(_prom->mmumap)); | |
a23414be PM |
1478 | if (!IHANDLE_VALID(_prom->memory) || !IHANDLE_VALID(_prom->mmumap)) |
1479 | of_workarounds &= ~OF_WA_CLAIM; /* hmmm */ | |
9b6b563c | 1480 | } |
a575b807 PM |
1481 | #else |
1482 | #define prom_find_mmu() | |
1483 | #endif | |
9b6b563c PM |
1484 | |
1485 | static void __init prom_init_stdout(void) | |
1486 | { | |
1487 | struct prom_t *_prom = &RELOC(prom); | |
1488 | char *path = RELOC(of_stdout_device); | |
1489 | char type[16]; | |
1490 | u32 val; | |
1491 | ||
1492 | if (prom_getprop(_prom->chosen, "stdout", &val, sizeof(val)) <= 0) | |
1493 | prom_panic("cannot find stdout"); | |
1494 | ||
1495 | _prom->stdout = val; | |
1496 | ||
1497 | /* Get the full OF pathname of the stdout device */ | |
1498 | memset(path, 0, 256); | |
1499 | call_prom("instance-to-path", 3, 1, _prom->stdout, path, 255); | |
1500 | val = call_prom("instance-to-package", 1, 1, _prom->stdout); | |
a23414be PM |
1501 | prom_setprop(_prom->chosen, "/chosen", "linux,stdout-package", |
1502 | &val, sizeof(val)); | |
9b6b563c | 1503 | prom_printf("OF stdout device is: %s\n", RELOC(of_stdout_device)); |
a23414be PM |
1504 | prom_setprop(_prom->chosen, "/chosen", "linux,stdout-path", |
1505 | path, strlen(path) + 1); | |
9b6b563c PM |
1506 | |
1507 | /* If it's a display, note it */ | |
1508 | memset(type, 0, sizeof(type)); | |
1509 | prom_getprop(val, "device_type", type, sizeof(type)); | |
1510 | if (strcmp(type, RELOC("display")) == 0) | |
a23414be | 1511 | prom_setprop(val, path, "linux,boot-display", NULL, 0); |
9b6b563c PM |
1512 | } |
1513 | ||
1514 | static void __init prom_close_stdin(void) | |
1515 | { | |
1516 | struct prom_t *_prom = &RELOC(prom); | |
1517 | ihandle val; | |
1518 | ||
1519 | if (prom_getprop(_prom->chosen, "stdin", &val, sizeof(val)) > 0) | |
1520 | call_prom("close", 1, 0, val); | |
1521 | } | |
1522 | ||
1523 | static int __init prom_find_machine_type(void) | |
1524 | { | |
1525 | struct prom_t *_prom = &RELOC(prom); | |
1526 | char compat[256]; | |
1527 | int len, i = 0; | |
21fe3301 | 1528 | #ifdef CONFIG_PPC64 |
9b6b563c | 1529 | phandle rtas; |
e8222502 | 1530 | int x; |
21fe3301 | 1531 | #endif |
e8222502 BH |
1532 | |
1533 | /* Look for a PowerMac */ | |
9b6b563c PM |
1534 | len = prom_getprop(_prom->root, "compatible", |
1535 | compat, sizeof(compat)-1); | |
1536 | if (len > 0) { | |
1537 | compat[len] = 0; | |
1538 | while (i < len) { | |
1539 | char *p = &compat[i]; | |
1540 | int sl = strlen(p); | |
1541 | if (sl == 0) | |
1542 | break; | |
1543 | if (strstr(p, RELOC("Power Macintosh")) || | |
a575b807 | 1544 | strstr(p, RELOC("MacRISC"))) |
9b6b563c | 1545 | return PLATFORM_POWERMAC; |
133dda1e AB |
1546 | #ifdef CONFIG_PPC64 |
1547 | /* We must make sure we don't detect the IBM Cell | |
1548 | * blades as pSeries due to some firmware issues, | |
1549 | * so we do it here. | |
1550 | */ | |
1551 | if (strstr(p, RELOC("IBM,CBEA")) || | |
1552 | strstr(p, RELOC("IBM,CPBW-1.0"))) | |
1553 | return PLATFORM_GENERIC; | |
1554 | #endif /* CONFIG_PPC64 */ | |
9b6b563c PM |
1555 | i += sl + 1; |
1556 | } | |
1557 | } | |
1558 | #ifdef CONFIG_PPC64 | |
e8222502 BH |
1559 | /* If not a mac, try to figure out if it's an IBM pSeries or any other |
1560 | * PAPR compliant platform. We assume it is if : | |
1561 | * - /device_type is "chrp" (please, do NOT use that for future | |
1562 | * non-IBM designs ! | |
1563 | * - it has /rtas | |
1564 | */ | |
6f806cee | 1565 | len = prom_getprop(_prom->root, "device_type", |
e8222502 BH |
1566 | compat, sizeof(compat)-1); |
1567 | if (len <= 0) | |
1568 | return PLATFORM_GENERIC; | |
cb6b2eb9 | 1569 | if (strcmp(compat, RELOC("chrp"))) |
e8222502 BH |
1570 | return PLATFORM_GENERIC; |
1571 | ||
9b6b563c PM |
1572 | /* Default to pSeries. We need to know if we are running LPAR */ |
1573 | rtas = call_prom("finddevice", 1, 1, ADDR("/rtas")); | |
e8222502 BH |
1574 | if (!PHANDLE_VALID(rtas)) |
1575 | return PLATFORM_GENERIC; | |
1576 | x = prom_getproplen(rtas, "ibm,hypertas-functions"); | |
1577 | if (x != PROM_ERROR) { | |
1578 | prom_printf("Hypertas detected, assuming LPAR !\n"); | |
1579 | return PLATFORM_PSERIES_LPAR; | |
9b6b563c PM |
1580 | } |
1581 | return PLATFORM_PSERIES; | |
1582 | #else | |
e8222502 | 1583 | return PLATFORM_GENERIC; |
9b6b563c PM |
1584 | #endif |
1585 | } | |
1586 | ||
9b6b563c PM |
1587 | static int __init prom_set_color(ihandle ih, int i, int r, int g, int b) |
1588 | { | |
1589 | return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r); | |
1590 | } | |
1591 | ||
1592 | /* | |
1593 | * If we have a display that we don't know how to drive, | |
1594 | * we will want to try to execute OF's open method for it | |
1595 | * later. However, OF will probably fall over if we do that | |
1596 | * we've taken over the MMU. | |
1597 | * So we check whether we will need to open the display, | |
1598 | * and if so, open it now. | |
1599 | */ | |
1600 | static void __init prom_check_displays(void) | |
1601 | { | |
1602 | char type[16], *path; | |
1603 | phandle node; | |
1604 | ihandle ih; | |
1605 | int i; | |
9b6b563c PM |
1606 | |
1607 | static unsigned char default_colors[] = { | |
1608 | 0x00, 0x00, 0x00, | |
1609 | 0x00, 0x00, 0xaa, | |
1610 | 0x00, 0xaa, 0x00, | |
1611 | 0x00, 0xaa, 0xaa, | |
1612 | 0xaa, 0x00, 0x00, | |
1613 | 0xaa, 0x00, 0xaa, | |
1614 | 0xaa, 0xaa, 0x00, | |
1615 | 0xaa, 0xaa, 0xaa, | |
1616 | 0x55, 0x55, 0x55, | |
1617 | 0x55, 0x55, 0xff, | |
1618 | 0x55, 0xff, 0x55, | |
1619 | 0x55, 0xff, 0xff, | |
1620 | 0xff, 0x55, 0x55, | |
1621 | 0xff, 0x55, 0xff, | |
1622 | 0xff, 0xff, 0x55, | |
1623 | 0xff, 0xff, 0xff | |
1624 | }; | |
1625 | const unsigned char *clut; | |
1626 | ||
1627 | prom_printf("Looking for displays\n"); | |
1628 | for (node = 0; prom_next_node(&node); ) { | |
1629 | memset(type, 0, sizeof(type)); | |
1630 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1631 | if (strcmp(type, RELOC("display")) != 0) | |
1632 | continue; | |
1633 | ||
1634 | /* It seems OF doesn't null-terminate the path :-( */ | |
1635 | path = RELOC(prom_scratch); | |
1636 | memset(path, 0, PROM_SCRATCH_SIZE); | |
1637 | ||
1638 | /* | |
1639 | * leave some room at the end of the path for appending extra | |
1640 | * arguments | |
1641 | */ | |
1642 | if (call_prom("package-to-path", 3, 1, node, path, | |
1643 | PROM_SCRATCH_SIZE-10) == PROM_ERROR) | |
1644 | continue; | |
1645 | prom_printf("found display : %s, opening ... ", path); | |
1646 | ||
1647 | ih = call_prom("open", 1, 1, path); | |
1648 | if (ih == 0) { | |
1649 | prom_printf("failed\n"); | |
1650 | continue; | |
1651 | } | |
1652 | ||
1653 | /* Success */ | |
1654 | prom_printf("done\n"); | |
a23414be | 1655 | prom_setprop(node, path, "linux,opened", NULL, 0); |
9b6b563c PM |
1656 | |
1657 | /* Setup a usable color table when the appropriate | |
1658 | * method is available. Should update this to set-colors */ | |
1659 | clut = RELOC(default_colors); | |
1660 | for (i = 0; i < 32; i++, clut += 3) | |
1661 | if (prom_set_color(ih, i, clut[0], clut[1], | |
1662 | clut[2]) != 0) | |
1663 | break; | |
1664 | ||
1665 | #ifdef CONFIG_LOGO_LINUX_CLUT224 | |
1666 | clut = PTRRELOC(RELOC(logo_linux_clut224.clut)); | |
1667 | for (i = 0; i < RELOC(logo_linux_clut224.clutsize); i++, clut += 3) | |
1668 | if (prom_set_color(ih, i + 32, clut[0], clut[1], | |
1669 | clut[2]) != 0) | |
1670 | break; | |
1671 | #endif /* CONFIG_LOGO_LINUX_CLUT224 */ | |
9b6b563c PM |
1672 | } |
1673 | } | |
1674 | ||
1675 | ||
1676 | /* Return (relocated) pointer to this much memory: moves initrd if reqd. */ | |
1677 | static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end, | |
1678 | unsigned long needed, unsigned long align) | |
1679 | { | |
1680 | void *ret; | |
1681 | ||
1682 | *mem_start = _ALIGN(*mem_start, align); | |
1683 | while ((*mem_start + needed) > *mem_end) { | |
1684 | unsigned long room, chunk; | |
1685 | ||
1686 | prom_debug("Chunk exhausted, claiming more at %x...\n", | |
1687 | RELOC(alloc_bottom)); | |
1688 | room = RELOC(alloc_top) - RELOC(alloc_bottom); | |
1689 | if (room > DEVTREE_CHUNK_SIZE) | |
1690 | room = DEVTREE_CHUNK_SIZE; | |
1691 | if (room < PAGE_SIZE) | |
1692 | prom_panic("No memory for flatten_device_tree (no room)"); | |
1693 | chunk = alloc_up(room, 0); | |
1694 | if (chunk == 0) | |
1695 | prom_panic("No memory for flatten_device_tree (claim failed)"); | |
1696 | *mem_end = RELOC(alloc_top); | |
1697 | } | |
1698 | ||
1699 | ret = (void *)*mem_start; | |
1700 | *mem_start += needed; | |
1701 | ||
1702 | return ret; | |
1703 | } | |
1704 | ||
1705 | #define dt_push_token(token, mem_start, mem_end) \ | |
1706 | do { *((u32 *)make_room(mem_start, mem_end, 4, 4)) = token; } while(0) | |
1707 | ||
1708 | static unsigned long __init dt_find_string(char *str) | |
1709 | { | |
1710 | char *s, *os; | |
1711 | ||
1712 | s = os = (char *)RELOC(dt_string_start); | |
1713 | s += 4; | |
1714 | while (s < (char *)RELOC(dt_string_end)) { | |
1715 | if (strcmp(s, str) == 0) | |
1716 | return s - os; | |
1717 | s += strlen(s) + 1; | |
1718 | } | |
1719 | return 0; | |
1720 | } | |
1721 | ||
1722 | /* | |
1723 | * The Open Firmware 1275 specification states properties must be 31 bytes or | |
1724 | * less, however not all firmwares obey this. Make it 64 bytes to be safe. | |
1725 | */ | |
1726 | #define MAX_PROPERTY_NAME 64 | |
1727 | ||
1728 | static void __init scan_dt_build_strings(phandle node, | |
1729 | unsigned long *mem_start, | |
1730 | unsigned long *mem_end) | |
1731 | { | |
1732 | char *prev_name, *namep, *sstart; | |
1733 | unsigned long soff; | |
1734 | phandle child; | |
1735 | ||
1736 | sstart = (char *)RELOC(dt_string_start); | |
1737 | ||
1738 | /* get and store all property names */ | |
1739 | prev_name = RELOC(""); | |
1740 | for (;;) { | |
1741 | /* 64 is max len of name including nul. */ | |
1742 | namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1); | |
1743 | if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) { | |
1744 | /* No more nodes: unwind alloc */ | |
1745 | *mem_start = (unsigned long)namep; | |
1746 | break; | |
1747 | } | |
1748 | ||
1749 | /* skip "name" */ | |
1750 | if (strcmp(namep, RELOC("name")) == 0) { | |
1751 | *mem_start = (unsigned long)namep; | |
1752 | prev_name = RELOC("name"); | |
1753 | continue; | |
1754 | } | |
1755 | /* get/create string entry */ | |
1756 | soff = dt_find_string(namep); | |
1757 | if (soff != 0) { | |
1758 | *mem_start = (unsigned long)namep; | |
1759 | namep = sstart + soff; | |
1760 | } else { | |
1761 | /* Trim off some if we can */ | |
1762 | *mem_start = (unsigned long)namep + strlen(namep) + 1; | |
1763 | RELOC(dt_string_end) = *mem_start; | |
1764 | } | |
1765 | prev_name = namep; | |
1766 | } | |
1767 | ||
1768 | /* do all our children */ | |
1769 | child = call_prom("child", 1, 1, node); | |
1770 | while (child != 0) { | |
1771 | scan_dt_build_strings(child, mem_start, mem_end); | |
1772 | child = call_prom("peer", 1, 1, child); | |
1773 | } | |
1774 | } | |
1775 | ||
1776 | static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start, | |
1777 | unsigned long *mem_end) | |
1778 | { | |
1779 | phandle child; | |
1780 | char *namep, *prev_name, *sstart, *p, *ep, *lp, *path; | |
1781 | unsigned long soff; | |
1782 | unsigned char *valp; | |
1783 | static char pname[MAX_PROPERTY_NAME]; | |
c4988820 | 1784 | int l, room; |
9b6b563c PM |
1785 | |
1786 | dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end); | |
1787 | ||
1788 | /* get the node's full name */ | |
1789 | namep = (char *)*mem_start; | |
c4988820 PM |
1790 | room = *mem_end - *mem_start; |
1791 | if (room > 255) | |
1792 | room = 255; | |
1793 | l = call_prom("package-to-path", 3, 1, node, namep, room); | |
9b6b563c PM |
1794 | if (l >= 0) { |
1795 | /* Didn't fit? Get more room. */ | |
c4988820 PM |
1796 | if (l >= room) { |
1797 | if (l >= *mem_end - *mem_start) | |
1798 | namep = make_room(mem_start, mem_end, l+1, 1); | |
9b6b563c PM |
1799 | call_prom("package-to-path", 3, 1, node, namep, l); |
1800 | } | |
1801 | namep[l] = '\0'; | |
1802 | ||
1803 | /* Fixup an Apple bug where they have bogus \0 chars in the | |
a575b807 PM |
1804 | * middle of the path in some properties, and extract |
1805 | * the unit name (everything after the last '/'). | |
9b6b563c | 1806 | */ |
a575b807 | 1807 | for (lp = p = namep, ep = namep + l; p < ep; p++) { |
9b6b563c | 1808 | if (*p == '/') |
a575b807 PM |
1809 | lp = namep; |
1810 | else if (*p != 0) | |
1811 | *lp++ = *p; | |
1812 | } | |
1813 | *lp = 0; | |
1814 | *mem_start = _ALIGN((unsigned long)lp + 1, 4); | |
9b6b563c PM |
1815 | } |
1816 | ||
1817 | /* get it again for debugging */ | |
1818 | path = RELOC(prom_scratch); | |
1819 | memset(path, 0, PROM_SCRATCH_SIZE); | |
1820 | call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); | |
1821 | ||
1822 | /* get and store all properties */ | |
1823 | prev_name = RELOC(""); | |
1824 | sstart = (char *)RELOC(dt_string_start); | |
1825 | for (;;) { | |
1826 | if (call_prom("nextprop", 3, 1, node, prev_name, | |
1827 | RELOC(pname)) != 1) | |
1828 | break; | |
1829 | ||
1830 | /* skip "name" */ | |
1831 | if (strcmp(RELOC(pname), RELOC("name")) == 0) { | |
1832 | prev_name = RELOC("name"); | |
1833 | continue; | |
1834 | } | |
1835 | ||
1836 | /* find string offset */ | |
1837 | soff = dt_find_string(RELOC(pname)); | |
1838 | if (soff == 0) { | |
1839 | prom_printf("WARNING: Can't find string index for" | |
1840 | " <%s>, node %s\n", RELOC(pname), path); | |
1841 | break; | |
1842 | } | |
1843 | prev_name = sstart + soff; | |
1844 | ||
1845 | /* get length */ | |
1846 | l = call_prom("getproplen", 2, 1, node, RELOC(pname)); | |
1847 | ||
1848 | /* sanity checks */ | |
1849 | if (l == PROM_ERROR) | |
1850 | continue; | |
1851 | if (l > MAX_PROPERTY_LENGTH) { | |
1852 | prom_printf("WARNING: ignoring large property "); | |
1853 | /* It seems OF doesn't null-terminate the path :-( */ | |
1854 | prom_printf("[%s] ", path); | |
1855 | prom_printf("%s length 0x%x\n", RELOC(pname), l); | |
1856 | continue; | |
1857 | } | |
1858 | ||
1859 | /* push property head */ | |
1860 | dt_push_token(OF_DT_PROP, mem_start, mem_end); | |
1861 | dt_push_token(l, mem_start, mem_end); | |
1862 | dt_push_token(soff, mem_start, mem_end); | |
1863 | ||
1864 | /* push property content */ | |
1865 | valp = make_room(mem_start, mem_end, l, 4); | |
1866 | call_prom("getprop", 4, 1, node, RELOC(pname), valp, l); | |
1867 | *mem_start = _ALIGN(*mem_start, 4); | |
1868 | } | |
1869 | ||
1870 | /* Add a "linux,phandle" property. */ | |
1871 | soff = dt_find_string(RELOC("linux,phandle")); | |
1872 | if (soff == 0) | |
1873 | prom_printf("WARNING: Can't find string index for" | |
1874 | " <linux-phandle> node %s\n", path); | |
1875 | else { | |
1876 | dt_push_token(OF_DT_PROP, mem_start, mem_end); | |
1877 | dt_push_token(4, mem_start, mem_end); | |
1878 | dt_push_token(soff, mem_start, mem_end); | |
1879 | valp = make_room(mem_start, mem_end, 4, 4); | |
1880 | *(u32 *)valp = node; | |
1881 | } | |
1882 | ||
1883 | /* do all our children */ | |
1884 | child = call_prom("child", 1, 1, node); | |
1885 | while (child != 0) { | |
1886 | scan_dt_build_struct(child, mem_start, mem_end); | |
1887 | child = call_prom("peer", 1, 1, child); | |
1888 | } | |
1889 | ||
1890 | dt_push_token(OF_DT_END_NODE, mem_start, mem_end); | |
1891 | } | |
1892 | ||
1893 | static void __init flatten_device_tree(void) | |
1894 | { | |
1895 | phandle root; | |
1896 | unsigned long mem_start, mem_end, room; | |
1897 | struct boot_param_header *hdr; | |
1898 | struct prom_t *_prom = &RELOC(prom); | |
1899 | char *namep; | |
1900 | u64 *rsvmap; | |
1901 | ||
1902 | /* | |
1903 | * Check how much room we have between alloc top & bottom (+/- a | |
1904 | * few pages), crop to 4Mb, as this is our "chuck" size | |
1905 | */ | |
1906 | room = RELOC(alloc_top) - RELOC(alloc_bottom) - 0x4000; | |
1907 | if (room > DEVTREE_CHUNK_SIZE) | |
1908 | room = DEVTREE_CHUNK_SIZE; | |
1909 | prom_debug("starting device tree allocs at %x\n", RELOC(alloc_bottom)); | |
1910 | ||
1911 | /* Now try to claim that */ | |
1912 | mem_start = (unsigned long)alloc_up(room, PAGE_SIZE); | |
1913 | if (mem_start == 0) | |
1914 | prom_panic("Can't allocate initial device-tree chunk\n"); | |
1915 | mem_end = RELOC(alloc_top); | |
1916 | ||
1917 | /* Get root of tree */ | |
1918 | root = call_prom("peer", 1, 1, (phandle)0); | |
1919 | if (root == (phandle)0) | |
1920 | prom_panic ("couldn't get device tree root\n"); | |
1921 | ||
1922 | /* Build header and make room for mem rsv map */ | |
1923 | mem_start = _ALIGN(mem_start, 4); | |
1924 | hdr = make_room(&mem_start, &mem_end, | |
1925 | sizeof(struct boot_param_header), 4); | |
1926 | RELOC(dt_header_start) = (unsigned long)hdr; | |
1927 | rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8); | |
1928 | ||
1929 | /* Start of strings */ | |
1930 | mem_start = PAGE_ALIGN(mem_start); | |
1931 | RELOC(dt_string_start) = mem_start; | |
1932 | mem_start += 4; /* hole */ | |
1933 | ||
1934 | /* Add "linux,phandle" in there, we'll need it */ | |
1935 | namep = make_room(&mem_start, &mem_end, 16, 1); | |
1936 | strcpy(namep, RELOC("linux,phandle")); | |
1937 | mem_start = (unsigned long)namep + strlen(namep) + 1; | |
1938 | ||
1939 | /* Build string array */ | |
1940 | prom_printf("Building dt strings...\n"); | |
1941 | scan_dt_build_strings(root, &mem_start, &mem_end); | |
1942 | RELOC(dt_string_end) = mem_start; | |
1943 | ||
1944 | /* Build structure */ | |
1945 | mem_start = PAGE_ALIGN(mem_start); | |
1946 | RELOC(dt_struct_start) = mem_start; | |
1947 | prom_printf("Building dt structure...\n"); | |
1948 | scan_dt_build_struct(root, &mem_start, &mem_end); | |
1949 | dt_push_token(OF_DT_END, &mem_start, &mem_end); | |
1950 | RELOC(dt_struct_end) = PAGE_ALIGN(mem_start); | |
1951 | ||
1952 | /* Finish header */ | |
1953 | hdr->boot_cpuid_phys = _prom->cpu; | |
1954 | hdr->magic = OF_DT_HEADER; | |
1955 | hdr->totalsize = RELOC(dt_struct_end) - RELOC(dt_header_start); | |
1956 | hdr->off_dt_struct = RELOC(dt_struct_start) - RELOC(dt_header_start); | |
1957 | hdr->off_dt_strings = RELOC(dt_string_start) - RELOC(dt_header_start); | |
1958 | hdr->dt_strings_size = RELOC(dt_string_end) - RELOC(dt_string_start); | |
1959 | hdr->off_mem_rsvmap = ((unsigned long)rsvmap) - RELOC(dt_header_start); | |
1960 | hdr->version = OF_DT_VERSION; | |
1961 | /* Version 16 is not backward compatible */ | |
1962 | hdr->last_comp_version = 0x10; | |
1963 | ||
4d1f3f25 | 1964 | /* Copy the reserve map in */ |
9b6b563c PM |
1965 | memcpy(rsvmap, RELOC(mem_reserve_map), sizeof(mem_reserve_map)); |
1966 | ||
1967 | #ifdef DEBUG_PROM | |
1968 | { | |
1969 | int i; | |
1970 | prom_printf("reserved memory map:\n"); | |
1971 | for (i = 0; i < RELOC(mem_reserve_cnt); i++) | |
1972 | prom_printf(" %x - %x\n", | |
1973 | RELOC(mem_reserve_map)[i].base, | |
1974 | RELOC(mem_reserve_map)[i].size); | |
1975 | } | |
1976 | #endif | |
4d1f3f25 JX |
1977 | /* Bump mem_reserve_cnt to cause further reservations to fail |
1978 | * since it's too late. | |
1979 | */ | |
9b6b563c PM |
1980 | RELOC(mem_reserve_cnt) = MEM_RESERVE_MAP_SIZE; |
1981 | ||
1982 | prom_printf("Device tree strings 0x%x -> 0x%x\n", | |
1983 | RELOC(dt_string_start), RELOC(dt_string_end)); | |
1984 | prom_printf("Device tree struct 0x%x -> 0x%x\n", | |
1985 | RELOC(dt_struct_start), RELOC(dt_struct_end)); | |
1986 | ||
1987 | } | |
1988 | ||
54f4ee18 HB |
1989 | #ifdef CONFIG_PPC_MAPLE |
1990 | /* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property. | |
1991 | * The values are bad, and it doesn't even have the right number of cells. */ | |
1992 | static void __init fixup_device_tree_maple(void) | |
9b6b563c | 1993 | { |
54f4ee18 | 1994 | phandle isa; |
980a6513 | 1995 | u32 rloc = 0x01002000; /* IO space; PCI device = 4 */ |
54f4ee18 | 1996 | u32 isa_ranges[6]; |
980a6513 BH |
1997 | char *name; |
1998 | ||
1999 | name = "/ht@0/isa@4"; | |
2000 | isa = call_prom("finddevice", 1, 1, ADDR(name)); | |
2001 | if (!PHANDLE_VALID(isa)) { | |
2002 | name = "/ht@0/isa@6"; | |
2003 | isa = call_prom("finddevice", 1, 1, ADDR(name)); | |
2004 | rloc = 0x01003000; /* IO space; PCI device = 6 */ | |
2005 | } | |
54f4ee18 HB |
2006 | if (!PHANDLE_VALID(isa)) |
2007 | return; | |
2008 | ||
980a6513 BH |
2009 | if (prom_getproplen(isa, "ranges") != 12) |
2010 | return; | |
54f4ee18 HB |
2011 | if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges)) |
2012 | == PROM_ERROR) | |
2013 | return; | |
2014 | ||
2015 | if (isa_ranges[0] != 0x1 || | |
2016 | isa_ranges[1] != 0xf4000000 || | |
2017 | isa_ranges[2] != 0x00010000) | |
2018 | return; | |
2019 | ||
980a6513 | 2020 | prom_printf("Fixing up bogus ISA range on Maple/Apache...\n"); |
54f4ee18 HB |
2021 | |
2022 | isa_ranges[0] = 0x1; | |
2023 | isa_ranges[1] = 0x0; | |
980a6513 | 2024 | isa_ranges[2] = rloc; |
54f4ee18 HB |
2025 | isa_ranges[3] = 0x0; |
2026 | isa_ranges[4] = 0x0; | |
2027 | isa_ranges[5] = 0x00010000; | |
980a6513 | 2028 | prom_setprop(isa, name, "ranges", |
54f4ee18 HB |
2029 | isa_ranges, sizeof(isa_ranges)); |
2030 | } | |
2031 | #else | |
2032 | #define fixup_device_tree_maple() | |
2033 | #endif | |
2034 | ||
e8c0acf9 BH |
2035 | #ifdef CONFIG_PPC_CHRP |
2036 | /* Pegasos lacks the "ranges" property in the isa node */ | |
2037 | static void __init fixup_device_tree_chrp(void) | |
2038 | { | |
2039 | phandle isa; | |
2040 | u32 isa_ranges[6]; | |
2041 | char *name; | |
2042 | int rc; | |
2043 | ||
2044 | name = "/pci@80000000/isa@c"; | |
2045 | isa = call_prom("finddevice", 1, 1, ADDR(name)); | |
2046 | if (!PHANDLE_VALID(isa)) | |
2047 | return; | |
2048 | ||
2049 | rc = prom_getproplen(isa, "ranges"); | |
2050 | if (rc != 0 && rc != PROM_ERROR) | |
2051 | return; | |
2052 | ||
2053 | prom_printf("Fixing up missing ISA range on Pegasos...\n"); | |
2054 | ||
2055 | isa_ranges[0] = 0x1; | |
2056 | isa_ranges[1] = 0x0; | |
2057 | isa_ranges[2] = 0x01006000; | |
2058 | isa_ranges[3] = 0x0; | |
2059 | isa_ranges[4] = 0x0; | |
2060 | isa_ranges[5] = 0x00010000; | |
2061 | prom_setprop(isa, name, "ranges", | |
2062 | isa_ranges, sizeof(isa_ranges)); | |
2063 | } | |
2064 | #else | |
2065 | #define fixup_device_tree_chrp() | |
2066 | #endif | |
2067 | ||
9b6b563c | 2068 | #if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC) |
54f4ee18 HB |
2069 | static void __init fixup_device_tree_pmac(void) |
2070 | { | |
9b6b563c PM |
2071 | phandle u3, i2c, mpic; |
2072 | u32 u3_rev; | |
2073 | u32 interrupts[2]; | |
2074 | u32 parent; | |
2075 | ||
2076 | /* Some G5s have a missing interrupt definition, fix it up here */ | |
2077 | u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000")); | |
2078 | if (!PHANDLE_VALID(u3)) | |
2079 | return; | |
2080 | i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000")); | |
2081 | if (!PHANDLE_VALID(i2c)) | |
2082 | return; | |
2083 | mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000")); | |
2084 | if (!PHANDLE_VALID(mpic)) | |
2085 | return; | |
2086 | ||
2087 | /* check if proper rev of u3 */ | |
2088 | if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev)) | |
2089 | == PROM_ERROR) | |
2090 | return; | |
7d49697e | 2091 | if (u3_rev < 0x35 || u3_rev > 0x39) |
9b6b563c PM |
2092 | return; |
2093 | /* does it need fixup ? */ | |
2094 | if (prom_getproplen(i2c, "interrupts") > 0) | |
2095 | return; | |
2096 | ||
2097 | prom_printf("fixing up bogus interrupts for u3 i2c...\n"); | |
2098 | ||
2099 | /* interrupt on this revision of u3 is number 0 and level */ | |
2100 | interrupts[0] = 0; | |
2101 | interrupts[1] = 1; | |
a23414be PM |
2102 | prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts", |
2103 | &interrupts, sizeof(interrupts)); | |
9b6b563c | 2104 | parent = (u32)mpic; |
a23414be PM |
2105 | prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent", |
2106 | &parent, sizeof(parent)); | |
9b6b563c | 2107 | } |
54f4ee18 HB |
2108 | #else |
2109 | #define fixup_device_tree_pmac() | |
2110 | #endif | |
9b6b563c | 2111 | |
54f4ee18 HB |
2112 | static void __init fixup_device_tree(void) |
2113 | { | |
2114 | fixup_device_tree_maple(); | |
e8c0acf9 | 2115 | fixup_device_tree_chrp(); |
54f4ee18 HB |
2116 | fixup_device_tree_pmac(); |
2117 | } | |
9b6b563c PM |
2118 | |
2119 | static void __init prom_find_boot_cpu(void) | |
2120 | { | |
2121 | struct prom_t *_prom = &RELOC(prom); | |
2122 | u32 getprop_rval; | |
2123 | ihandle prom_cpu; | |
2124 | phandle cpu_pkg; | |
2125 | ||
a575b807 | 2126 | _prom->cpu = 0; |
9b6b563c | 2127 | if (prom_getprop(_prom->chosen, "cpu", &prom_cpu, sizeof(prom_cpu)) <= 0) |
a575b807 | 2128 | return; |
9b6b563c PM |
2129 | |
2130 | cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu); | |
2131 | ||
2132 | prom_getprop(cpu_pkg, "reg", &getprop_rval, sizeof(getprop_rval)); | |
2133 | _prom->cpu = getprop_rval; | |
2134 | ||
2135 | prom_debug("Booting CPU hw index = 0x%x\n", _prom->cpu); | |
2136 | } | |
2137 | ||
2138 | static void __init prom_check_initrd(unsigned long r3, unsigned long r4) | |
2139 | { | |
2140 | #ifdef CONFIG_BLK_DEV_INITRD | |
2141 | struct prom_t *_prom = &RELOC(prom); | |
2142 | ||
2143 | if (r3 && r4 && r4 != 0xdeadbeef) { | |
2144 | unsigned long val; | |
2145 | ||
51fae6de | 2146 | RELOC(prom_initrd_start) = is_kernel_addr(r3) ? __pa(r3) : r3; |
9b6b563c PM |
2147 | RELOC(prom_initrd_end) = RELOC(prom_initrd_start) + r4; |
2148 | ||
2149 | val = RELOC(prom_initrd_start); | |
a23414be PM |
2150 | prom_setprop(_prom->chosen, "/chosen", "linux,initrd-start", |
2151 | &val, sizeof(val)); | |
9b6b563c | 2152 | val = RELOC(prom_initrd_end); |
a23414be PM |
2153 | prom_setprop(_prom->chosen, "/chosen", "linux,initrd-end", |
2154 | &val, sizeof(val)); | |
9b6b563c PM |
2155 | |
2156 | reserve_mem(RELOC(prom_initrd_start), | |
2157 | RELOC(prom_initrd_end) - RELOC(prom_initrd_start)); | |
2158 | ||
2159 | prom_debug("initrd_start=0x%x\n", RELOC(prom_initrd_start)); | |
2160 | prom_debug("initrd_end=0x%x\n", RELOC(prom_initrd_end)); | |
2161 | } | |
2162 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
2163 | } | |
2164 | ||
2165 | /* | |
2166 | * We enter here early on, when the Open Firmware prom is still | |
2167 | * handling exceptions and the MMU hash table for us. | |
2168 | */ | |
2169 | ||
2170 | unsigned long __init prom_init(unsigned long r3, unsigned long r4, | |
2171 | unsigned long pp, | |
2172 | unsigned long r6, unsigned long r7) | |
2173 | { | |
2174 | struct prom_t *_prom; | |
9b6b563c | 2175 | unsigned long hdr; |
b42b6617 | 2176 | unsigned long offset = reloc_offset(); |
9b6b563c PM |
2177 | |
2178 | #ifdef CONFIG_PPC32 | |
9b6b563c PM |
2179 | reloc_got2(offset); |
2180 | #endif | |
2181 | ||
2182 | _prom = &RELOC(prom); | |
2183 | ||
2184 | /* | |
2185 | * First zero the BSS | |
2186 | */ | |
2187 | memset(&RELOC(__bss_start), 0, __bss_stop - __bss_start); | |
2188 | ||
2189 | /* | |
2190 | * Init interface to Open Firmware, get some node references, | |
2191 | * like /chosen | |
2192 | */ | |
2193 | prom_init_client_services(pp); | |
2194 | ||
2195 | /* | |
a23414be PM |
2196 | * See if this OF is old enough that we need to do explicit maps |
2197 | * and other workarounds | |
9b6b563c | 2198 | */ |
a23414be | 2199 | prom_find_mmu(); |
9b6b563c | 2200 | |
a575b807 | 2201 | /* |
a23414be | 2202 | * Init prom stdout device |
a575b807 | 2203 | */ |
a23414be | 2204 | prom_init_stdout(); |
a575b807 | 2205 | |
9b6b563c PM |
2206 | /* |
2207 | * Get default machine type. At this point, we do not differentiate | |
2208 | * between pSeries SMP and pSeries LPAR | |
2209 | */ | |
2210 | RELOC(of_platform) = prom_find_machine_type(); | |
9b6b563c | 2211 | |
add60ef3 OH |
2212 | /* Bail if this is a kdump kernel. */ |
2213 | if (PHYSICAL_START > 0) | |
2214 | prom_panic("Error: You can't boot a kdump kernel from OF!\n"); | |
2215 | ||
2216 | /* | |
2217 | * Check for an initrd | |
2218 | */ | |
2219 | prom_check_initrd(r3, r4); | |
2220 | ||
9b6b563c PM |
2221 | #ifdef CONFIG_PPC_PSERIES |
2222 | /* | |
2223 | * On pSeries, inform the firmware about our capabilities | |
2224 | */ | |
799d6046 PM |
2225 | if (RELOC(of_platform) == PLATFORM_PSERIES || |
2226 | RELOC(of_platform) == PLATFORM_PSERIES_LPAR) | |
9b6b563c PM |
2227 | prom_send_capabilities(); |
2228 | #endif | |
2229 | ||
9b6b563c | 2230 | /* |
f3f66f59 | 2231 | * Copy the CPU hold code |
9b6b563c | 2232 | */ |
55d36339 | 2233 | if (RELOC(of_platform) != PLATFORM_POWERMAC) |
5a408329 | 2234 | copy_and_flush(0, KERNELBASE + offset, 0x100, 0); |
9b6b563c PM |
2235 | |
2236 | /* | |
2237 | * Do early parsing of command line | |
2238 | */ | |
2239 | early_cmdline_parse(); | |
2240 | ||
2241 | /* | |
2242 | * Initialize memory management within prom_init | |
2243 | */ | |
2244 | prom_init_mem(); | |
2245 | ||
2246 | /* | |
2247 | * Determine which cpu is actually running right _now_ | |
2248 | */ | |
2249 | prom_find_boot_cpu(); | |
2250 | ||
2251 | /* | |
2252 | * Initialize display devices | |
2253 | */ | |
2254 | prom_check_displays(); | |
2255 | ||
2256 | #ifdef CONFIG_PPC64 | |
2257 | /* | |
2258 | * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else | |
2259 | * that uses the allocator, we need to make sure we get the top of memory | |
2260 | * available for us here... | |
2261 | */ | |
2262 | if (RELOC(of_platform) == PLATFORM_PSERIES) | |
2263 | prom_initialize_tce_table(); | |
2264 | #endif | |
2265 | ||
2266 | /* | |
2267 | * On non-powermacs, try to instantiate RTAS and puts all CPUs | |
2268 | * in spin-loops. PowerMacs don't have a working RTAS and use | |
2269 | * a different way to spin CPUs | |
2270 | */ | |
2271 | if (RELOC(of_platform) != PLATFORM_POWERMAC) { | |
2272 | prom_instantiate_rtas(); | |
2273 | prom_hold_cpus(); | |
2274 | } | |
2275 | ||
2276 | /* | |
2277 | * Fill in some infos for use by the kernel later on | |
2278 | */ | |
9b6b563c PM |
2279 | #ifdef CONFIG_PPC64 |
2280 | if (RELOC(ppc64_iommu_off)) | |
a23414be PM |
2281 | prom_setprop(_prom->chosen, "/chosen", "linux,iommu-off", |
2282 | NULL, 0); | |
9b6b563c PM |
2283 | |
2284 | if (RELOC(iommu_force_on)) | |
a23414be PM |
2285 | prom_setprop(_prom->chosen, "/chosen", "linux,iommu-force-on", |
2286 | NULL, 0); | |
9b6b563c PM |
2287 | |
2288 | if (RELOC(prom_tce_alloc_start)) { | |
a23414be | 2289 | prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-start", |
9b6b563c PM |
2290 | &RELOC(prom_tce_alloc_start), |
2291 | sizeof(prom_tce_alloc_start)); | |
a23414be | 2292 | prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-end", |
9b6b563c PM |
2293 | &RELOC(prom_tce_alloc_end), |
2294 | sizeof(prom_tce_alloc_end)); | |
2295 | } | |
2296 | #endif | |
2297 | ||
2298 | /* | |
2299 | * Fixup any known bugs in the device-tree | |
2300 | */ | |
2301 | fixup_device_tree(); | |
2302 | ||
2303 | /* | |
2304 | * Now finally create the flattened device-tree | |
2305 | */ | |
2306 | prom_printf("copying OF device tree ...\n"); | |
2307 | flatten_device_tree(); | |
2308 | ||
3825ac0e PM |
2309 | /* |
2310 | * in case stdin is USB and still active on IBM machines... | |
2311 | * Unfortunately quiesce crashes on some powermacs if we have | |
2312 | * closed stdin already (in particular the powerbook 101). | |
2313 | */ | |
2314 | if (RELOC(of_platform) != PLATFORM_POWERMAC) | |
2315 | prom_close_stdin(); | |
9b6b563c PM |
2316 | |
2317 | /* | |
2318 | * Call OF "quiesce" method to shut down pending DMA's from | |
2319 | * devices etc... | |
2320 | */ | |
2321 | prom_printf("Calling quiesce ...\n"); | |
2322 | call_prom("quiesce", 0, 0); | |
2323 | ||
2324 | /* | |
2325 | * And finally, call the kernel passing it the flattened device | |
2326 | * tree and NULL as r5, thus triggering the new entry point which | |
2327 | * is common to us and kexec | |
2328 | */ | |
2329 | hdr = RELOC(dt_header_start); | |
2330 | prom_printf("returning from prom_init\n"); | |
2331 | prom_debug("->dt_header_start=0x%x\n", hdr); | |
2332 | ||
2333 | #ifdef CONFIG_PPC32 | |
2334 | reloc_got2(-offset); | |
2335 | #endif | |
2336 | ||
35499c01 | 2337 | __start(hdr, KERNELBASE + offset, 0); |
9b6b563c PM |
2338 | |
2339 | return 0; | |
2340 | } |