Commit | Line | Data |
---|---|---|
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 | |
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 | |
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)) | |
165785e5 | 585 | RELOC(prom_iommu_off) = 1; |
9b6b563c | 586 | else if (!strncmp(opt, RELOC("force"), 5)) |
165785e5 | 587 | RELOC(prom_iommu_force_on) = 1; |
9b6b563c PM |
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 */ | |
974a76f5 | 630 | #define OV3_DFP 0x20 /* decimal FP */ |
f709bfac PM |
631 | |
632 | /* Option vector 5: PAPR/OF options supported */ | |
633 | #define OV5_LPAR 0x80 /* logical partitioning supported */ | |
634 | #define OV5_SPLPAR 0x40 /* shared-processor LPAR supported */ | |
635 | /* ibm,dynamic-reconfiguration-memory property supported */ | |
636 | #define OV5_DRCONF_MEMORY 0x20 | |
637 | #define OV5_LARGE_PAGES 0x10 /* large pages supported */ | |
014dad90 ME |
638 | /* PCIe/MSI support. Without MSI full PCIe is not supported */ |
639 | #ifdef CONFIG_PCI_MSI | |
640 | #define OV5_MSI 0x01 /* PCIe/MSI support */ | |
641 | #else | |
642 | #define OV5_MSI 0x00 | |
643 | #endif /* CONFIG_PCI_MSI */ | |
f709bfac PM |
644 | |
645 | /* | |
646 | * The architecture vector has an array of PVR mask/value pairs, | |
647 | * followed by # option vectors - 1, followed by the option vectors. | |
648 | */ | |
649 | static unsigned char ibm_architecture_vec[] = { | |
650 | W(0xfffe0000), W(0x003a0000), /* POWER5/POWER5+ */ | |
03054d51 | 651 | W(0xffff0000), W(0x003e0000), /* POWER6 */ |
0efbc18a | 652 | W(0xffffffff), W(0x0f000002), /* all 2.05-compliant */ |
f709bfac PM |
653 | W(0xfffffffe), W(0x0f000001), /* all 2.04-compliant and earlier */ |
654 | 5 - 1, /* 5 option vectors */ | |
655 | ||
656 | /* option vector 1: processor architectures supported */ | |
11e9ed43 | 657 | 3 - 2, /* length */ |
f709bfac PM |
658 | 0, /* don't ignore, don't halt */ |
659 | OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 | | |
660 | OV1_PPC_2_04 | OV1_PPC_2_05, | |
661 | ||
662 | /* option vector 2: Open Firmware options supported */ | |
11e9ed43 | 663 | 34 - 2, /* length */ |
f709bfac PM |
664 | OV2_REAL_MODE, |
665 | 0, 0, | |
666 | W(0xffffffff), /* real_base */ | |
667 | W(0xffffffff), /* real_size */ | |
668 | W(0xffffffff), /* virt_base */ | |
669 | W(0xffffffff), /* virt_size */ | |
670 | W(0xffffffff), /* load_base */ | |
671 | W(64), /* 128MB min RMA */ | |
672 | W(0xffffffff), /* full client load */ | |
673 | 0, /* min RMA percentage of total RAM */ | |
674 | 48, /* max log_2(hash table size) */ | |
675 | ||
676 | /* option vector 3: processor options supported */ | |
11e9ed43 | 677 | 3 - 2, /* length */ |
f709bfac | 678 | 0, /* don't ignore, don't halt */ |
974a76f5 | 679 | OV3_FP | OV3_VMX | OV3_DFP, |
f709bfac PM |
680 | |
681 | /* option vector 4: IBM PAPR implementation */ | |
11e9ed43 | 682 | 2 - 2, /* length */ |
f709bfac PM |
683 | 0, /* don't halt */ |
684 | ||
685 | /* option vector 5: PAPR/OF options */ | |
11e9ed43 | 686 | 3 - 2, /* length */ |
f709bfac | 687 | 0, /* don't ignore, don't halt */ |
014dad90 | 688 | OV5_LPAR | OV5_SPLPAR | OV5_LARGE_PAGES | OV5_DRCONF_MEMORY | OV5_MSI, |
f709bfac PM |
689 | }; |
690 | ||
691 | /* Old method - ELF header with PT_NOTE sections */ | |
9b6b563c PM |
692 | static struct fake_elf { |
693 | Elf32_Ehdr elfhdr; | |
694 | Elf32_Phdr phdr[2]; | |
695 | struct chrpnote { | |
696 | u32 namesz; | |
697 | u32 descsz; | |
698 | u32 type; | |
699 | char name[8]; /* "PowerPC" */ | |
700 | struct chrpdesc { | |
701 | u32 real_mode; | |
702 | u32 real_base; | |
703 | u32 real_size; | |
704 | u32 virt_base; | |
705 | u32 virt_size; | |
706 | u32 load_base; | |
707 | } chrpdesc; | |
708 | } chrpnote; | |
709 | struct rpanote { | |
710 | u32 namesz; | |
711 | u32 descsz; | |
712 | u32 type; | |
713 | char name[24]; /* "IBM,RPA-Client-Config" */ | |
714 | struct rpadesc { | |
715 | u32 lpar_affinity; | |
716 | u32 min_rmo_size; | |
717 | u32 min_rmo_percent; | |
718 | u32 max_pft_size; | |
719 | u32 splpar; | |
720 | u32 min_load; | |
721 | u32 new_mem_def; | |
722 | u32 ignore_me; | |
723 | } rpadesc; | |
724 | } rpanote; | |
725 | } fake_elf = { | |
726 | .elfhdr = { | |
727 | .e_ident = { 0x7f, 'E', 'L', 'F', | |
728 | ELFCLASS32, ELFDATA2MSB, EV_CURRENT }, | |
729 | .e_type = ET_EXEC, /* yeah right */ | |
730 | .e_machine = EM_PPC, | |
731 | .e_version = EV_CURRENT, | |
732 | .e_phoff = offsetof(struct fake_elf, phdr), | |
733 | .e_phentsize = sizeof(Elf32_Phdr), | |
734 | .e_phnum = 2 | |
735 | }, | |
736 | .phdr = { | |
737 | [0] = { | |
738 | .p_type = PT_NOTE, | |
739 | .p_offset = offsetof(struct fake_elf, chrpnote), | |
740 | .p_filesz = sizeof(struct chrpnote) | |
741 | }, [1] = { | |
742 | .p_type = PT_NOTE, | |
743 | .p_offset = offsetof(struct fake_elf, rpanote), | |
744 | .p_filesz = sizeof(struct rpanote) | |
745 | } | |
746 | }, | |
747 | .chrpnote = { | |
748 | .namesz = sizeof("PowerPC"), | |
749 | .descsz = sizeof(struct chrpdesc), | |
750 | .type = 0x1275, | |
751 | .name = "PowerPC", | |
752 | .chrpdesc = { | |
753 | .real_mode = ~0U, /* ~0 means "don't care" */ | |
754 | .real_base = ~0U, | |
755 | .real_size = ~0U, | |
756 | .virt_base = ~0U, | |
757 | .virt_size = ~0U, | |
758 | .load_base = ~0U | |
759 | }, | |
760 | }, | |
761 | .rpanote = { | |
762 | .namesz = sizeof("IBM,RPA-Client-Config"), | |
763 | .descsz = sizeof(struct rpadesc), | |
764 | .type = 0x12759999, | |
765 | .name = "IBM,RPA-Client-Config", | |
766 | .rpadesc = { | |
767 | .lpar_affinity = 0, | |
768 | .min_rmo_size = 64, /* in megabytes */ | |
769 | .min_rmo_percent = 0, | |
770 | .max_pft_size = 48, /* 2^48 bytes max PFT size */ | |
771 | .splpar = 1, | |
772 | .min_load = ~0U, | |
773 | .new_mem_def = 0 | |
774 | } | |
775 | } | |
776 | }; | |
777 | ||
778 | static void __init prom_send_capabilities(void) | |
779 | { | |
f709bfac PM |
780 | ihandle elfloader, root; |
781 | prom_arg_t ret; | |
782 | ||
783 | root = call_prom("open", 1, 1, ADDR("/")); | |
784 | if (root != 0) { | |
785 | /* try calling the ibm,client-architecture-support method */ | |
786 | if (call_prom_ret("call-method", 3, 2, &ret, | |
787 | ADDR("ibm,client-architecture-support"), | |
33b74977 | 788 | root, |
f709bfac PM |
789 | ADDR(ibm_architecture_vec)) == 0) { |
790 | /* the call exists... */ | |
791 | if (ret) | |
792 | prom_printf("WARNING: ibm,client-architecture" | |
793 | "-support call FAILED!\n"); | |
794 | call_prom("close", 1, 0, root); | |
795 | return; | |
796 | } | |
797 | call_prom("close", 1, 0, root); | |
798 | } | |
9b6b563c | 799 | |
f709bfac | 800 | /* no ibm,client-architecture-support call, try the old way */ |
9b6b563c PM |
801 | elfloader = call_prom("open", 1, 1, ADDR("/packages/elf-loader")); |
802 | if (elfloader == 0) { | |
803 | prom_printf("couldn't open /packages/elf-loader\n"); | |
804 | return; | |
805 | } | |
806 | call_prom("call-method", 3, 1, ADDR("process-elf-header"), | |
807 | elfloader, ADDR(&fake_elf)); | |
808 | call_prom("close", 1, 0, elfloader); | |
809 | } | |
810 | #endif | |
811 | ||
812 | /* | |
813 | * Memory allocation strategy... our layout is normally: | |
814 | * | |
815 | * at 14Mb or more we have vmlinux, then a gap and initrd. In some | |
816 | * rare cases, initrd might end up being before the kernel though. | |
817 | * We assume this won't override the final kernel at 0, we have no | |
818 | * provision to handle that in this version, but it should hopefully | |
819 | * never happen. | |
820 | * | |
821 | * alloc_top is set to the top of RMO, eventually shrink down if the | |
822 | * TCEs overlap | |
823 | * | |
824 | * alloc_bottom is set to the top of kernel/initrd | |
825 | * | |
826 | * from there, allocations are done this way : rtas is allocated | |
827 | * topmost, and the device-tree is allocated from the bottom. We try | |
828 | * to grow the device-tree allocation as we progress. If we can't, | |
829 | * then we fail, we don't currently have a facility to restart | |
830 | * elsewhere, but that shouldn't be necessary. | |
831 | * | |
832 | * Note that calls to reserve_mem have to be done explicitly, memory | |
833 | * allocated with either alloc_up or alloc_down isn't automatically | |
834 | * reserved. | |
835 | */ | |
836 | ||
837 | ||
838 | /* | |
839 | * Allocates memory in the RMO upward from the kernel/initrd | |
840 | * | |
841 | * When align is 0, this is a special case, it means to allocate in place | |
842 | * at the current location of alloc_bottom or fail (that is basically | |
843 | * extending the previous allocation). Used for the device-tree flattening | |
844 | */ | |
845 | static unsigned long __init alloc_up(unsigned long size, unsigned long align) | |
846 | { | |
c4988820 | 847 | unsigned long base = RELOC(alloc_bottom); |
9b6b563c PM |
848 | unsigned long addr = 0; |
849 | ||
c4988820 PM |
850 | if (align) |
851 | base = _ALIGN_UP(base, align); | |
9b6b563c PM |
852 | prom_debug("alloc_up(%x, %x)\n", size, align); |
853 | if (RELOC(ram_top) == 0) | |
854 | prom_panic("alloc_up() called with mem not initialized\n"); | |
855 | ||
856 | if (align) | |
857 | base = _ALIGN_UP(RELOC(alloc_bottom), align); | |
858 | else | |
859 | base = RELOC(alloc_bottom); | |
860 | ||
861 | for(; (base + size) <= RELOC(alloc_top); | |
862 | base = _ALIGN_UP(base + 0x100000, align)) { | |
863 | prom_debug(" trying: 0x%x\n\r", base); | |
864 | addr = (unsigned long)prom_claim(base, size, 0); | |
c4988820 | 865 | if (addr != PROM_ERROR && addr != 0) |
9b6b563c PM |
866 | break; |
867 | addr = 0; | |
868 | if (align == 0) | |
869 | break; | |
870 | } | |
871 | if (addr == 0) | |
872 | return 0; | |
873 | RELOC(alloc_bottom) = addr; | |
874 | ||
875 | prom_debug(" -> %x\n", addr); | |
876 | prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom)); | |
877 | prom_debug(" alloc_top : %x\n", RELOC(alloc_top)); | |
878 | prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); | |
879 | prom_debug(" rmo_top : %x\n", RELOC(rmo_top)); | |
880 | prom_debug(" ram_top : %x\n", RELOC(ram_top)); | |
881 | ||
882 | return addr; | |
883 | } | |
884 | ||
885 | /* | |
886 | * Allocates memory downward, either from top of RMO, or if highmem | |
887 | * is set, from the top of RAM. Note that this one doesn't handle | |
888 | * failures. It does claim memory if highmem is not set. | |
889 | */ | |
890 | static unsigned long __init alloc_down(unsigned long size, unsigned long align, | |
891 | int highmem) | |
892 | { | |
893 | unsigned long base, addr = 0; | |
894 | ||
895 | prom_debug("alloc_down(%x, %x, %s)\n", size, align, | |
896 | highmem ? RELOC("(high)") : RELOC("(low)")); | |
897 | if (RELOC(ram_top) == 0) | |
898 | prom_panic("alloc_down() called with mem not initialized\n"); | |
899 | ||
900 | if (highmem) { | |
901 | /* Carve out storage for the TCE table. */ | |
902 | addr = _ALIGN_DOWN(RELOC(alloc_top_high) - size, align); | |
903 | if (addr <= RELOC(alloc_bottom)) | |
904 | return 0; | |
905 | /* Will we bump into the RMO ? If yes, check out that we | |
906 | * didn't overlap existing allocations there, if we did, | |
907 | * we are dead, we must be the first in town ! | |
908 | */ | |
909 | if (addr < RELOC(rmo_top)) { | |
910 | /* Good, we are first */ | |
911 | if (RELOC(alloc_top) == RELOC(rmo_top)) | |
912 | RELOC(alloc_top) = RELOC(rmo_top) = addr; | |
913 | else | |
914 | return 0; | |
915 | } | |
916 | RELOC(alloc_top_high) = addr; | |
917 | goto bail; | |
918 | } | |
919 | ||
920 | base = _ALIGN_DOWN(RELOC(alloc_top) - size, align); | |
921 | for (; base > RELOC(alloc_bottom); | |
922 | base = _ALIGN_DOWN(base - 0x100000, align)) { | |
923 | prom_debug(" trying: 0x%x\n\r", base); | |
924 | addr = (unsigned long)prom_claim(base, size, 0); | |
c4988820 | 925 | if (addr != PROM_ERROR && addr != 0) |
9b6b563c PM |
926 | break; |
927 | addr = 0; | |
928 | } | |
929 | if (addr == 0) | |
930 | return 0; | |
931 | RELOC(alloc_top) = addr; | |
932 | ||
933 | bail: | |
934 | prom_debug(" -> %x\n", addr); | |
935 | prom_debug(" alloc_bottom : %x\n", RELOC(alloc_bottom)); | |
936 | prom_debug(" alloc_top : %x\n", RELOC(alloc_top)); | |
937 | prom_debug(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); | |
938 | prom_debug(" rmo_top : %x\n", RELOC(rmo_top)); | |
939 | prom_debug(" ram_top : %x\n", RELOC(ram_top)); | |
940 | ||
941 | return addr; | |
942 | } | |
943 | ||
944 | /* | |
945 | * Parse a "reg" cell | |
946 | */ | |
947 | static unsigned long __init prom_next_cell(int s, cell_t **cellp) | |
948 | { | |
949 | cell_t *p = *cellp; | |
950 | unsigned long r = 0; | |
951 | ||
952 | /* Ignore more than 2 cells */ | |
953 | while (s > sizeof(unsigned long) / 4) { | |
954 | p++; | |
955 | s--; | |
956 | } | |
957 | r = *p++; | |
958 | #ifdef CONFIG_PPC64 | |
35499c01 | 959 | if (s > 1) { |
9b6b563c PM |
960 | r <<= 32; |
961 | r |= *(p++); | |
962 | } | |
963 | #endif | |
964 | *cellp = p; | |
965 | return r; | |
966 | } | |
967 | ||
968 | /* | |
969 | * Very dumb function for adding to the memory reserve list, but | |
970 | * we don't need anything smarter at this point | |
971 | * | |
972 | * XXX Eventually check for collisions. They should NEVER happen. | |
973 | * If problems seem to show up, it would be a good start to track | |
974 | * them down. | |
975 | */ | |
0108d3fe | 976 | static void __init reserve_mem(u64 base, u64 size) |
9b6b563c | 977 | { |
cbbcf340 | 978 | u64 top = base + size; |
9b6b563c PM |
979 | unsigned long cnt = RELOC(mem_reserve_cnt); |
980 | ||
981 | if (size == 0) | |
982 | return; | |
983 | ||
984 | /* We need to always keep one empty entry so that we | |
985 | * have our terminator with "size" set to 0 since we are | |
986 | * dumb and just copy this entire array to the boot params | |
987 | */ | |
988 | base = _ALIGN_DOWN(base, PAGE_SIZE); | |
989 | top = _ALIGN_UP(top, PAGE_SIZE); | |
990 | size = top - base; | |
991 | ||
992 | if (cnt >= (MEM_RESERVE_MAP_SIZE - 1)) | |
993 | prom_panic("Memory reserve map exhausted !\n"); | |
994 | RELOC(mem_reserve_map)[cnt].base = base; | |
995 | RELOC(mem_reserve_map)[cnt].size = size; | |
996 | RELOC(mem_reserve_cnt) = cnt + 1; | |
997 | } | |
998 | ||
999 | /* | |
b3c2ffd5 | 1000 | * Initialize memory allocation mechanism, parse "memory" nodes and |
9b6b563c PM |
1001 | * obtain that way the top of memory and RMO to setup out local allocator |
1002 | */ | |
1003 | static void __init prom_init_mem(void) | |
1004 | { | |
1005 | phandle node; | |
1006 | char *path, type[64]; | |
1007 | unsigned int plen; | |
1008 | cell_t *p, *endp; | |
1009 | struct prom_t *_prom = &RELOC(prom); | |
1010 | u32 rac, rsc; | |
1011 | ||
1012 | /* | |
1013 | * We iterate the memory nodes to find | |
1014 | * 1) top of RMO (first node) | |
1015 | * 2) top of memory | |
1016 | */ | |
1017 | rac = 2; | |
1018 | prom_getprop(_prom->root, "#address-cells", &rac, sizeof(rac)); | |
1019 | rsc = 1; | |
1020 | prom_getprop(_prom->root, "#size-cells", &rsc, sizeof(rsc)); | |
1021 | prom_debug("root_addr_cells: %x\n", (unsigned long) rac); | |
1022 | prom_debug("root_size_cells: %x\n", (unsigned long) rsc); | |
1023 | ||
1024 | prom_debug("scanning memory:\n"); | |
1025 | path = RELOC(prom_scratch); | |
1026 | ||
1027 | for (node = 0; prom_next_node(&node); ) { | |
1028 | type[0] = 0; | |
1029 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1030 | ||
c4988820 PM |
1031 | if (type[0] == 0) { |
1032 | /* | |
1033 | * CHRP Longtrail machines have no device_type | |
1034 | * on the memory node, so check the name instead... | |
1035 | */ | |
1036 | prom_getprop(node, "name", type, sizeof(type)); | |
1037 | } | |
9b6b563c PM |
1038 | if (strcmp(type, RELOC("memory"))) |
1039 | continue; | |
c4988820 | 1040 | |
9b6b563c PM |
1041 | plen = prom_getprop(node, "reg", RELOC(regbuf), sizeof(regbuf)); |
1042 | if (plen > sizeof(regbuf)) { | |
1043 | prom_printf("memory node too large for buffer !\n"); | |
1044 | plen = sizeof(regbuf); | |
1045 | } | |
1046 | p = RELOC(regbuf); | |
1047 | endp = p + (plen / sizeof(cell_t)); | |
1048 | ||
1049 | #ifdef DEBUG_PROM | |
1050 | memset(path, 0, PROM_SCRATCH_SIZE); | |
1051 | call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); | |
1052 | prom_debug(" node %s :\n", path); | |
1053 | #endif /* DEBUG_PROM */ | |
1054 | ||
1055 | while ((endp - p) >= (rac + rsc)) { | |
1056 | unsigned long base, size; | |
1057 | ||
1058 | base = prom_next_cell(rac, &p); | |
1059 | size = prom_next_cell(rsc, &p); | |
1060 | ||
1061 | if (size == 0) | |
1062 | continue; | |
1063 | prom_debug(" %x %x\n", base, size); | |
ab1b55e2 | 1064 | if (base == 0 && (RELOC(of_platform) & PLATFORM_LPAR)) |
9b6b563c PM |
1065 | RELOC(rmo_top) = size; |
1066 | if ((base + size) > RELOC(ram_top)) | |
1067 | RELOC(ram_top) = base + size; | |
1068 | } | |
1069 | } | |
1070 | ||
1071 | RELOC(alloc_bottom) = PAGE_ALIGN((unsigned long)&RELOC(_end) + 0x4000); | |
1072 | ||
1073 | /* Check if we have an initrd after the kernel, if we do move our bottom | |
1074 | * point to after it | |
1075 | */ | |
1076 | if (RELOC(prom_initrd_start)) { | |
1077 | if (RELOC(prom_initrd_end) > RELOC(alloc_bottom)) | |
1078 | RELOC(alloc_bottom) = PAGE_ALIGN(RELOC(prom_initrd_end)); | |
1079 | } | |
1080 | ||
9b6b563c PM |
1081 | /* |
1082 | * Setup our top alloc point, that is top of RMO or top of | |
1083 | * segment 0 when running non-LPAR. | |
1084 | * Some RS64 machines have buggy firmware where claims up at | |
1085 | * 1GB fail. Cap at 768MB as a workaround. | |
1086 | * Since 768MB is plenty of room, and we need to cap to something | |
1087 | * reasonable on 32-bit, cap at 768MB on all machines. | |
1088 | */ | |
1089 | if (!RELOC(rmo_top)) | |
1090 | RELOC(rmo_top) = RELOC(ram_top); | |
1091 | RELOC(rmo_top) = min(0x30000000ul, RELOC(rmo_top)); | |
1092 | RELOC(alloc_top) = RELOC(rmo_top); | |
2babf5c2 | 1093 | RELOC(alloc_top_high) = RELOC(ram_top); |
9b6b563c PM |
1094 | |
1095 | prom_printf("memory layout at init:\n"); | |
9b6b563c PM |
1096 | prom_printf(" alloc_bottom : %x\n", RELOC(alloc_bottom)); |
1097 | prom_printf(" alloc_top : %x\n", RELOC(alloc_top)); | |
1098 | prom_printf(" alloc_top_hi : %x\n", RELOC(alloc_top_high)); | |
1099 | prom_printf(" rmo_top : %x\n", RELOC(rmo_top)); | |
1100 | prom_printf(" ram_top : %x\n", RELOC(ram_top)); | |
1101 | } | |
1102 | ||
1103 | ||
1104 | /* | |
1105 | * Allocate room for and instantiate RTAS | |
1106 | */ | |
1107 | static void __init prom_instantiate_rtas(void) | |
1108 | { | |
1109 | phandle rtas_node; | |
1110 | ihandle rtas_inst; | |
1111 | u32 base, entry = 0; | |
1112 | u32 size = 0; | |
1113 | ||
1114 | prom_debug("prom_instantiate_rtas: start...\n"); | |
1115 | ||
1116 | rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas")); | |
1117 | prom_debug("rtas_node: %x\n", rtas_node); | |
1118 | if (!PHANDLE_VALID(rtas_node)) | |
1119 | return; | |
1120 | ||
1121 | prom_getprop(rtas_node, "rtas-size", &size, sizeof(size)); | |
1122 | if (size == 0) | |
1123 | return; | |
1124 | ||
1125 | base = alloc_down(size, PAGE_SIZE, 0); | |
1126 | if (base == 0) { | |
1127 | prom_printf("RTAS allocation failed !\n"); | |
1128 | return; | |
1129 | } | |
1130 | ||
1131 | rtas_inst = call_prom("open", 1, 1, ADDR("/rtas")); | |
1132 | if (!IHANDLE_VALID(rtas_inst)) { | |
a23414be | 1133 | prom_printf("opening rtas package failed (%x)\n", rtas_inst); |
9b6b563c PM |
1134 | return; |
1135 | } | |
1136 | ||
1137 | prom_printf("instantiating rtas at 0x%x ...", base); | |
1138 | ||
1139 | if (call_prom_ret("call-method", 3, 2, &entry, | |
1140 | ADDR("instantiate-rtas"), | |
a23414be | 1141 | rtas_inst, base) != 0 |
9b6b563c PM |
1142 | || entry == 0) { |
1143 | prom_printf(" failed\n"); | |
1144 | return; | |
1145 | } | |
1146 | prom_printf(" done\n"); | |
1147 | ||
1148 | reserve_mem(base, size); | |
1149 | ||
a23414be PM |
1150 | prom_setprop(rtas_node, "/rtas", "linux,rtas-base", |
1151 | &base, sizeof(base)); | |
1152 | prom_setprop(rtas_node, "/rtas", "linux,rtas-entry", | |
1153 | &entry, sizeof(entry)); | |
9b6b563c PM |
1154 | |
1155 | prom_debug("rtas base = 0x%x\n", base); | |
1156 | prom_debug("rtas entry = 0x%x\n", entry); | |
1157 | prom_debug("rtas size = 0x%x\n", (long)size); | |
1158 | ||
1159 | prom_debug("prom_instantiate_rtas: end...\n"); | |
1160 | } | |
1161 | ||
1162 | #ifdef CONFIG_PPC64 | |
1163 | /* | |
1164 | * Allocate room for and initialize TCE tables | |
1165 | */ | |
1166 | static void __init prom_initialize_tce_table(void) | |
1167 | { | |
1168 | phandle node; | |
1169 | ihandle phb_node; | |
1170 | char compatible[64], type[64], model[64]; | |
1171 | char *path = RELOC(prom_scratch); | |
1172 | u64 base, align; | |
1173 | u32 minalign, minsize; | |
1174 | u64 tce_entry, *tce_entryp; | |
1175 | u64 local_alloc_top, local_alloc_bottom; | |
1176 | u64 i; | |
1177 | ||
165785e5 | 1178 | if (RELOC(prom_iommu_off)) |
9b6b563c PM |
1179 | return; |
1180 | ||
1181 | prom_debug("starting prom_initialize_tce_table\n"); | |
1182 | ||
1183 | /* Cache current top of allocs so we reserve a single block */ | |
1184 | local_alloc_top = RELOC(alloc_top_high); | |
1185 | local_alloc_bottom = local_alloc_top; | |
1186 | ||
1187 | /* Search all nodes looking for PHBs. */ | |
1188 | for (node = 0; prom_next_node(&node); ) { | |
1189 | compatible[0] = 0; | |
1190 | type[0] = 0; | |
1191 | model[0] = 0; | |
1192 | prom_getprop(node, "compatible", | |
1193 | compatible, sizeof(compatible)); | |
1194 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1195 | prom_getprop(node, "model", model, sizeof(model)); | |
1196 | ||
1197 | if ((type[0] == 0) || (strstr(type, RELOC("pci")) == NULL)) | |
1198 | continue; | |
1199 | ||
1200 | /* Keep the old logic in tack to avoid regression. */ | |
1201 | if (compatible[0] != 0) { | |
1202 | if ((strstr(compatible, RELOC("python")) == NULL) && | |
1203 | (strstr(compatible, RELOC("Speedwagon")) == NULL) && | |
1204 | (strstr(compatible, RELOC("Winnipeg")) == NULL)) | |
1205 | continue; | |
1206 | } else if (model[0] != 0) { | |
1207 | if ((strstr(model, RELOC("ython")) == NULL) && | |
1208 | (strstr(model, RELOC("peedwagon")) == NULL) && | |
1209 | (strstr(model, RELOC("innipeg")) == NULL)) | |
1210 | continue; | |
1211 | } | |
1212 | ||
1213 | if (prom_getprop(node, "tce-table-minalign", &minalign, | |
1214 | sizeof(minalign)) == PROM_ERROR) | |
1215 | minalign = 0; | |
1216 | if (prom_getprop(node, "tce-table-minsize", &minsize, | |
1217 | sizeof(minsize)) == PROM_ERROR) | |
1218 | minsize = 4UL << 20; | |
1219 | ||
1220 | /* | |
1221 | * Even though we read what OF wants, we just set the table | |
1222 | * size to 4 MB. This is enough to map 2GB of PCI DMA space. | |
1223 | * By doing this, we avoid the pitfalls of trying to DMA to | |
1224 | * MMIO space and the DMA alias hole. | |
1225 | * | |
1226 | * On POWER4, firmware sets the TCE region by assuming | |
1227 | * each TCE table is 8MB. Using this memory for anything | |
1228 | * else will impact performance, so we always allocate 8MB. | |
1229 | * Anton | |
1230 | */ | |
1231 | if (__is_processor(PV_POWER4) || __is_processor(PV_POWER4p)) | |
1232 | minsize = 8UL << 20; | |
1233 | else | |
1234 | minsize = 4UL << 20; | |
1235 | ||
1236 | /* Align to the greater of the align or size */ | |
1237 | align = max(minalign, minsize); | |
1238 | base = alloc_down(minsize, align, 1); | |
1239 | if (base == 0) | |
1240 | prom_panic("ERROR, cannot find space for TCE table.\n"); | |
1241 | if (base < local_alloc_bottom) | |
1242 | local_alloc_bottom = base; | |
1243 | ||
9b6b563c PM |
1244 | /* It seems OF doesn't null-terminate the path :-( */ |
1245 | memset(path, 0, sizeof(path)); | |
1246 | /* Call OF to setup the TCE hardware */ | |
1247 | if (call_prom("package-to-path", 3, 1, node, | |
1248 | path, PROM_SCRATCH_SIZE-1) == PROM_ERROR) { | |
1249 | prom_printf("package-to-path failed\n"); | |
1250 | } | |
1251 | ||
a23414be PM |
1252 | /* Save away the TCE table attributes for later use. */ |
1253 | prom_setprop(node, path, "linux,tce-base", &base, sizeof(base)); | |
1254 | prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize)); | |
1255 | ||
9b6b563c PM |
1256 | prom_debug("TCE table: %s\n", path); |
1257 | prom_debug("\tnode = 0x%x\n", node); | |
1258 | prom_debug("\tbase = 0x%x\n", base); | |
1259 | prom_debug("\tsize = 0x%x\n", minsize); | |
1260 | ||
1261 | /* Initialize the table to have a one-to-one mapping | |
1262 | * over the allocated size. | |
1263 | */ | |
1264 | tce_entryp = (unsigned long *)base; | |
1265 | for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) { | |
1266 | tce_entry = (i << PAGE_SHIFT); | |
1267 | tce_entry |= 0x3; | |
1268 | *tce_entryp = tce_entry; | |
1269 | } | |
1270 | ||
1271 | prom_printf("opening PHB %s", path); | |
1272 | phb_node = call_prom("open", 1, 1, path); | |
1273 | if (phb_node == 0) | |
1274 | prom_printf("... failed\n"); | |
1275 | else | |
1276 | prom_printf("... done\n"); | |
1277 | ||
1278 | call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"), | |
1279 | phb_node, -1, minsize, | |
1280 | (u32) base, (u32) (base >> 32)); | |
1281 | call_prom("close", 1, 0, phb_node); | |
1282 | } | |
1283 | ||
1284 | reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom); | |
1285 | ||
2babf5c2 ME |
1286 | /* These are only really needed if there is a memory limit in |
1287 | * effect, but we don't know so export them always. */ | |
1288 | RELOC(prom_tce_alloc_start) = local_alloc_bottom; | |
1289 | RELOC(prom_tce_alloc_end) = local_alloc_top; | |
9b6b563c PM |
1290 | |
1291 | /* Flag the first invalid entry */ | |
1292 | prom_debug("ending prom_initialize_tce_table\n"); | |
1293 | } | |
1294 | #endif | |
1295 | ||
1296 | /* | |
1297 | * With CHRP SMP we need to use the OF to start the other processors. | |
1298 | * We can't wait until smp_boot_cpus (the OF is trashed by then) | |
1299 | * so we have to put the processors into a holding pattern controlled | |
1300 | * by the kernel (not OF) before we destroy the OF. | |
1301 | * | |
1302 | * This uses a chunk of low memory, puts some holding pattern | |
1303 | * code there and sends the other processors off to there until | |
1304 | * smp_boot_cpus tells them to do something. The holding pattern | |
1305 | * checks that address until its cpu # is there, when it is that | |
1306 | * cpu jumps to __secondary_start(). smp_boot_cpus() takes care | |
1307 | * of setting those values. | |
1308 | * | |
1309 | * We also use physical address 0x4 here to tell when a cpu | |
1310 | * is in its holding pattern code. | |
1311 | * | |
1312 | * -- Cort | |
1313 | */ | |
bbd0abda PM |
1314 | extern void __secondary_hold(void); |
1315 | extern unsigned long __secondary_hold_spinloop; | |
1316 | extern unsigned long __secondary_hold_acknowledge; | |
1317 | ||
1318 | /* | |
1319 | * We want to reference the copy of __secondary_hold_* in the | |
1320 | * 0 - 0x100 address range | |
1321 | */ | |
1322 | #define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff) | |
1323 | ||
9b6b563c PM |
1324 | static void __init prom_hold_cpus(void) |
1325 | { | |
9b6b563c PM |
1326 | unsigned long i; |
1327 | unsigned int reg; | |
1328 | phandle node; | |
1329 | char type[64]; | |
1330 | int cpuid = 0; | |
1331 | unsigned int interrupt_server[MAX_CPU_THREADS]; | |
1332 | unsigned int cpu_threads, hw_cpu_num; | |
1333 | int propsize; | |
bbd0abda | 1334 | struct prom_t *_prom = &RELOC(prom); |
9b6b563c | 1335 | unsigned long *spinloop |
bbd0abda | 1336 | = (void *) LOW_ADDR(__secondary_hold_spinloop); |
9b6b563c | 1337 | unsigned long *acknowledge |
bbd0abda | 1338 | = (void *) LOW_ADDR(__secondary_hold_acknowledge); |
9b6b563c | 1339 | #ifdef CONFIG_PPC64 |
bbd0abda | 1340 | /* __secondary_hold is actually a descriptor, not the text address */ |
9b6b563c PM |
1341 | unsigned long secondary_hold |
1342 | = __pa(*PTRRELOC((unsigned long *)__secondary_hold)); | |
1343 | #else | |
bbd0abda | 1344 | unsigned long secondary_hold = LOW_ADDR(__secondary_hold); |
9b6b563c | 1345 | #endif |
9b6b563c PM |
1346 | |
1347 | prom_debug("prom_hold_cpus: start...\n"); | |
1348 | prom_debug(" 1) spinloop = 0x%x\n", (unsigned long)spinloop); | |
1349 | prom_debug(" 1) *spinloop = 0x%x\n", *spinloop); | |
1350 | prom_debug(" 1) acknowledge = 0x%x\n", | |
1351 | (unsigned long)acknowledge); | |
1352 | prom_debug(" 1) *acknowledge = 0x%x\n", *acknowledge); | |
1353 | prom_debug(" 1) secondary_hold = 0x%x\n", secondary_hold); | |
1354 | ||
1355 | /* Set the common spinloop variable, so all of the secondary cpus | |
1356 | * will block when they are awakened from their OF spinloop. | |
1357 | * This must occur for both SMP and non SMP kernels, since OF will | |
1358 | * be trashed when we move the kernel. | |
1359 | */ | |
1360 | *spinloop = 0; | |
1361 | ||
9b6b563c PM |
1362 | /* look for cpus */ |
1363 | for (node = 0; prom_next_node(&node); ) { | |
1364 | type[0] = 0; | |
1365 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1366 | if (strcmp(type, RELOC("cpu")) != 0) | |
1367 | continue; | |
1368 | ||
1369 | /* Skip non-configured cpus. */ | |
1370 | if (prom_getprop(node, "status", type, sizeof(type)) > 0) | |
1371 | if (strcmp(type, RELOC("okay")) != 0) | |
1372 | continue; | |
1373 | ||
1374 | reg = -1; | |
1375 | prom_getprop(node, "reg", ®, sizeof(reg)); | |
1376 | ||
1377 | prom_debug("\ncpuid = 0x%x\n", cpuid); | |
1378 | prom_debug("cpu hw idx = 0x%x\n", reg); | |
1379 | ||
1380 | /* Init the acknowledge var which will be reset by | |
1381 | * the secondary cpu when it awakens from its OF | |
1382 | * spinloop. | |
1383 | */ | |
1384 | *acknowledge = (unsigned long)-1; | |
1385 | ||
1386 | propsize = prom_getprop(node, "ibm,ppc-interrupt-server#s", | |
1387 | &interrupt_server, | |
1388 | sizeof(interrupt_server)); | |
1389 | if (propsize < 0) { | |
1390 | /* no property. old hardware has no SMT */ | |
1391 | cpu_threads = 1; | |
1392 | interrupt_server[0] = reg; /* fake it with phys id */ | |
1393 | } else { | |
1394 | /* We have a threaded processor */ | |
1395 | cpu_threads = propsize / sizeof(u32); | |
1396 | if (cpu_threads > MAX_CPU_THREADS) { | |
1397 | prom_printf("SMT: too many threads!\n" | |
1398 | "SMT: found %x, max is %x\n", | |
1399 | cpu_threads, MAX_CPU_THREADS); | |
1400 | cpu_threads = 1; /* ToDo: panic? */ | |
1401 | } | |
1402 | } | |
1403 | ||
1404 | hw_cpu_num = interrupt_server[0]; | |
1405 | if (hw_cpu_num != _prom->cpu) { | |
1406 | /* Primary Thread of non-boot cpu */ | |
1407 | prom_printf("%x : starting cpu hw idx %x... ", cpuid, reg); | |
1408 | call_prom("start-cpu", 3, 0, node, | |
1409 | secondary_hold, reg); | |
1410 | ||
bbd0abda PM |
1411 | for (i = 0; (i < 100000000) && |
1412 | (*acknowledge == ((unsigned long)-1)); i++ ) | |
9b6b563c PM |
1413 | mb(); |
1414 | ||
bbd0abda | 1415 | if (*acknowledge == reg) |
9b6b563c | 1416 | prom_printf("done\n"); |
bbd0abda | 1417 | else |
9b6b563c | 1418 | prom_printf("failed: %x\n", *acknowledge); |
9b6b563c PM |
1419 | } |
1420 | #ifdef CONFIG_SMP | |
1421 | else | |
1422 | prom_printf("%x : boot cpu %x\n", cpuid, reg); | |
9b6b563c | 1423 | #endif /* CONFIG_SMP */ |
bbd0abda PM |
1424 | |
1425 | /* Reserve cpu #s for secondary threads. They start later. */ | |
1426 | cpuid += cpu_threads; | |
9b6b563c | 1427 | } |
9b6b563c PM |
1428 | |
1429 | if (cpuid > NR_CPUS) | |
1430 | prom_printf("WARNING: maximum CPUs (" __stringify(NR_CPUS) | |
1431 | ") exceeded: ignoring extras\n"); | |
1432 | ||
1433 | prom_debug("prom_hold_cpus: end...\n"); | |
9b6b563c PM |
1434 | } |
1435 | ||
1436 | ||
1437 | static void __init prom_init_client_services(unsigned long pp) | |
1438 | { | |
1439 | struct prom_t *_prom = &RELOC(prom); | |
1440 | ||
1441 | /* Get a handle to the prom entry point before anything else */ | |
1442 | RELOC(prom_entry) = pp; | |
1443 | ||
1444 | /* get a handle for the stdout device */ | |
1445 | _prom->chosen = call_prom("finddevice", 1, 1, ADDR("/chosen")); | |
1446 | if (!PHANDLE_VALID(_prom->chosen)) | |
1447 | prom_panic("cannot find chosen"); /* msg won't be printed :( */ | |
1448 | ||
1449 | /* get device tree root */ | |
1450 | _prom->root = call_prom("finddevice", 1, 1, ADDR("/")); | |
1451 | if (!PHANDLE_VALID(_prom->root)) | |
1452 | prom_panic("cannot find device tree root"); /* msg won't be printed :( */ | |
a575b807 PM |
1453 | |
1454 | _prom->mmumap = 0; | |
1455 | } | |
1456 | ||
1457 | #ifdef CONFIG_PPC32 | |
1458 | /* | |
1459 | * For really old powermacs, we need to map things we claim. | |
1460 | * For that, we need the ihandle of the mmu. | |
a23414be | 1461 | * Also, on the longtrail, we need to work around other bugs. |
a575b807 PM |
1462 | */ |
1463 | static void __init prom_find_mmu(void) | |
1464 | { | |
1465 | struct prom_t *_prom = &RELOC(prom); | |
1466 | phandle oprom; | |
1467 | char version[64]; | |
1468 | ||
1469 | oprom = call_prom("finddevice", 1, 1, ADDR("/openprom")); | |
1470 | if (!PHANDLE_VALID(oprom)) | |
1471 | return; | |
1472 | if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0) | |
1473 | return; | |
1474 | version[sizeof(version) - 1] = 0; | |
a575b807 | 1475 | /* XXX might need to add other versions here */ |
a23414be PM |
1476 | if (strcmp(version, "Open Firmware, 1.0.5") == 0) |
1477 | of_workarounds = OF_WA_CLAIM; | |
1478 | else if (strncmp(version, "FirmWorks,3.", 12) == 0) { | |
1479 | of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL; | |
1480 | call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim"); | |
1481 | } else | |
a575b807 | 1482 | return; |
a23414be | 1483 | _prom->memory = call_prom("open", 1, 1, ADDR("/memory")); |
a575b807 PM |
1484 | prom_getprop(_prom->chosen, "mmu", &_prom->mmumap, |
1485 | sizeof(_prom->mmumap)); | |
a23414be PM |
1486 | if (!IHANDLE_VALID(_prom->memory) || !IHANDLE_VALID(_prom->mmumap)) |
1487 | of_workarounds &= ~OF_WA_CLAIM; /* hmmm */ | |
9b6b563c | 1488 | } |
a575b807 PM |
1489 | #else |
1490 | #define prom_find_mmu() | |
1491 | #endif | |
9b6b563c PM |
1492 | |
1493 | static void __init prom_init_stdout(void) | |
1494 | { | |
1495 | struct prom_t *_prom = &RELOC(prom); | |
1496 | char *path = RELOC(of_stdout_device); | |
1497 | char type[16]; | |
1498 | u32 val; | |
1499 | ||
1500 | if (prom_getprop(_prom->chosen, "stdout", &val, sizeof(val)) <= 0) | |
1501 | prom_panic("cannot find stdout"); | |
1502 | ||
1503 | _prom->stdout = val; | |
1504 | ||
1505 | /* Get the full OF pathname of the stdout device */ | |
1506 | memset(path, 0, 256); | |
1507 | call_prom("instance-to-path", 3, 1, _prom->stdout, path, 255); | |
1508 | val = call_prom("instance-to-package", 1, 1, _prom->stdout); | |
a23414be PM |
1509 | prom_setprop(_prom->chosen, "/chosen", "linux,stdout-package", |
1510 | &val, sizeof(val)); | |
9b6b563c | 1511 | prom_printf("OF stdout device is: %s\n", RELOC(of_stdout_device)); |
a23414be PM |
1512 | prom_setprop(_prom->chosen, "/chosen", "linux,stdout-path", |
1513 | path, strlen(path) + 1); | |
9b6b563c PM |
1514 | |
1515 | /* If it's a display, note it */ | |
1516 | memset(type, 0, sizeof(type)); | |
1517 | prom_getprop(val, "device_type", type, sizeof(type)); | |
1518 | if (strcmp(type, RELOC("display")) == 0) | |
a23414be | 1519 | prom_setprop(val, path, "linux,boot-display", NULL, 0); |
9b6b563c PM |
1520 | } |
1521 | ||
1522 | static void __init prom_close_stdin(void) | |
1523 | { | |
1524 | struct prom_t *_prom = &RELOC(prom); | |
1525 | ihandle val; | |
1526 | ||
1527 | if (prom_getprop(_prom->chosen, "stdin", &val, sizeof(val)) > 0) | |
1528 | call_prom("close", 1, 0, val); | |
1529 | } | |
1530 | ||
1531 | static int __init prom_find_machine_type(void) | |
1532 | { | |
1533 | struct prom_t *_prom = &RELOC(prom); | |
1534 | char compat[256]; | |
1535 | int len, i = 0; | |
21fe3301 | 1536 | #ifdef CONFIG_PPC64 |
9b6b563c | 1537 | phandle rtas; |
e8222502 | 1538 | int x; |
21fe3301 | 1539 | #endif |
e8222502 BH |
1540 | |
1541 | /* Look for a PowerMac */ | |
9b6b563c PM |
1542 | len = prom_getprop(_prom->root, "compatible", |
1543 | compat, sizeof(compat)-1); | |
1544 | if (len > 0) { | |
1545 | compat[len] = 0; | |
1546 | while (i < len) { | |
1547 | char *p = &compat[i]; | |
1548 | int sl = strlen(p); | |
1549 | if (sl == 0) | |
1550 | break; | |
1551 | if (strstr(p, RELOC("Power Macintosh")) || | |
a575b807 | 1552 | strstr(p, RELOC("MacRISC"))) |
9b6b563c | 1553 | return PLATFORM_POWERMAC; |
133dda1e AB |
1554 | #ifdef CONFIG_PPC64 |
1555 | /* We must make sure we don't detect the IBM Cell | |
1556 | * blades as pSeries due to some firmware issues, | |
1557 | * so we do it here. | |
1558 | */ | |
1559 | if (strstr(p, RELOC("IBM,CBEA")) || | |
1560 | strstr(p, RELOC("IBM,CPBW-1.0"))) | |
1561 | return PLATFORM_GENERIC; | |
1562 | #endif /* CONFIG_PPC64 */ | |
9b6b563c PM |
1563 | i += sl + 1; |
1564 | } | |
1565 | } | |
1566 | #ifdef CONFIG_PPC64 | |
e8222502 BH |
1567 | /* If not a mac, try to figure out if it's an IBM pSeries or any other |
1568 | * PAPR compliant platform. We assume it is if : | |
1569 | * - /device_type is "chrp" (please, do NOT use that for future | |
1570 | * non-IBM designs ! | |
1571 | * - it has /rtas | |
1572 | */ | |
6f806cee | 1573 | len = prom_getprop(_prom->root, "device_type", |
e8222502 BH |
1574 | compat, sizeof(compat)-1); |
1575 | if (len <= 0) | |
1576 | return PLATFORM_GENERIC; | |
cb6b2eb9 | 1577 | if (strcmp(compat, RELOC("chrp"))) |
e8222502 BH |
1578 | return PLATFORM_GENERIC; |
1579 | ||
9b6b563c PM |
1580 | /* Default to pSeries. We need to know if we are running LPAR */ |
1581 | rtas = call_prom("finddevice", 1, 1, ADDR("/rtas")); | |
e8222502 BH |
1582 | if (!PHANDLE_VALID(rtas)) |
1583 | return PLATFORM_GENERIC; | |
1584 | x = prom_getproplen(rtas, "ibm,hypertas-functions"); | |
1585 | if (x != PROM_ERROR) { | |
1586 | prom_printf("Hypertas detected, assuming LPAR !\n"); | |
1587 | return PLATFORM_PSERIES_LPAR; | |
9b6b563c PM |
1588 | } |
1589 | return PLATFORM_PSERIES; | |
1590 | #else | |
e8222502 | 1591 | return PLATFORM_GENERIC; |
9b6b563c PM |
1592 | #endif |
1593 | } | |
1594 | ||
9b6b563c PM |
1595 | static int __init prom_set_color(ihandle ih, int i, int r, int g, int b) |
1596 | { | |
1597 | return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r); | |
1598 | } | |
1599 | ||
1600 | /* | |
1601 | * If we have a display that we don't know how to drive, | |
1602 | * we will want to try to execute OF's open method for it | |
1603 | * later. However, OF will probably fall over if we do that | |
1604 | * we've taken over the MMU. | |
1605 | * So we check whether we will need to open the display, | |
1606 | * and if so, open it now. | |
1607 | */ | |
1608 | static void __init prom_check_displays(void) | |
1609 | { | |
1610 | char type[16], *path; | |
1611 | phandle node; | |
1612 | ihandle ih; | |
1613 | int i; | |
9b6b563c PM |
1614 | |
1615 | static unsigned char default_colors[] = { | |
1616 | 0x00, 0x00, 0x00, | |
1617 | 0x00, 0x00, 0xaa, | |
1618 | 0x00, 0xaa, 0x00, | |
1619 | 0x00, 0xaa, 0xaa, | |
1620 | 0xaa, 0x00, 0x00, | |
1621 | 0xaa, 0x00, 0xaa, | |
1622 | 0xaa, 0xaa, 0x00, | |
1623 | 0xaa, 0xaa, 0xaa, | |
1624 | 0x55, 0x55, 0x55, | |
1625 | 0x55, 0x55, 0xff, | |
1626 | 0x55, 0xff, 0x55, | |
1627 | 0x55, 0xff, 0xff, | |
1628 | 0xff, 0x55, 0x55, | |
1629 | 0xff, 0x55, 0xff, | |
1630 | 0xff, 0xff, 0x55, | |
1631 | 0xff, 0xff, 0xff | |
1632 | }; | |
1633 | const unsigned char *clut; | |
1634 | ||
1635 | prom_printf("Looking for displays\n"); | |
1636 | for (node = 0; prom_next_node(&node); ) { | |
1637 | memset(type, 0, sizeof(type)); | |
1638 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1639 | if (strcmp(type, RELOC("display")) != 0) | |
1640 | continue; | |
1641 | ||
1642 | /* It seems OF doesn't null-terminate the path :-( */ | |
1643 | path = RELOC(prom_scratch); | |
1644 | memset(path, 0, PROM_SCRATCH_SIZE); | |
1645 | ||
1646 | /* | |
1647 | * leave some room at the end of the path for appending extra | |
1648 | * arguments | |
1649 | */ | |
1650 | if (call_prom("package-to-path", 3, 1, node, path, | |
1651 | PROM_SCRATCH_SIZE-10) == PROM_ERROR) | |
1652 | continue; | |
1653 | prom_printf("found display : %s, opening ... ", path); | |
1654 | ||
1655 | ih = call_prom("open", 1, 1, path); | |
1656 | if (ih == 0) { | |
1657 | prom_printf("failed\n"); | |
1658 | continue; | |
1659 | } | |
1660 | ||
1661 | /* Success */ | |
1662 | prom_printf("done\n"); | |
a23414be | 1663 | prom_setprop(node, path, "linux,opened", NULL, 0); |
9b6b563c PM |
1664 | |
1665 | /* Setup a usable color table when the appropriate | |
1666 | * method is available. Should update this to set-colors */ | |
1667 | clut = RELOC(default_colors); | |
1668 | for (i = 0; i < 32; i++, clut += 3) | |
1669 | if (prom_set_color(ih, i, clut[0], clut[1], | |
1670 | clut[2]) != 0) | |
1671 | break; | |
1672 | ||
1673 | #ifdef CONFIG_LOGO_LINUX_CLUT224 | |
1674 | clut = PTRRELOC(RELOC(logo_linux_clut224.clut)); | |
1675 | for (i = 0; i < RELOC(logo_linux_clut224.clutsize); i++, clut += 3) | |
1676 | if (prom_set_color(ih, i + 32, clut[0], clut[1], | |
1677 | clut[2]) != 0) | |
1678 | break; | |
1679 | #endif /* CONFIG_LOGO_LINUX_CLUT224 */ | |
9b6b563c PM |
1680 | } |
1681 | } | |
1682 | ||
1683 | ||
1684 | /* Return (relocated) pointer to this much memory: moves initrd if reqd. */ | |
1685 | static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end, | |
1686 | unsigned long needed, unsigned long align) | |
1687 | { | |
1688 | void *ret; | |
1689 | ||
1690 | *mem_start = _ALIGN(*mem_start, align); | |
1691 | while ((*mem_start + needed) > *mem_end) { | |
1692 | unsigned long room, chunk; | |
1693 | ||
1694 | prom_debug("Chunk exhausted, claiming more at %x...\n", | |
1695 | RELOC(alloc_bottom)); | |
1696 | room = RELOC(alloc_top) - RELOC(alloc_bottom); | |
1697 | if (room > DEVTREE_CHUNK_SIZE) | |
1698 | room = DEVTREE_CHUNK_SIZE; | |
1699 | if (room < PAGE_SIZE) | |
1700 | prom_panic("No memory for flatten_device_tree (no room)"); | |
1701 | chunk = alloc_up(room, 0); | |
1702 | if (chunk == 0) | |
1703 | prom_panic("No memory for flatten_device_tree (claim failed)"); | |
1704 | *mem_end = RELOC(alloc_top); | |
1705 | } | |
1706 | ||
1707 | ret = (void *)*mem_start; | |
1708 | *mem_start += needed; | |
1709 | ||
1710 | return ret; | |
1711 | } | |
1712 | ||
1713 | #define dt_push_token(token, mem_start, mem_end) \ | |
1714 | do { *((u32 *)make_room(mem_start, mem_end, 4, 4)) = token; } while(0) | |
1715 | ||
1716 | static unsigned long __init dt_find_string(char *str) | |
1717 | { | |
1718 | char *s, *os; | |
1719 | ||
1720 | s = os = (char *)RELOC(dt_string_start); | |
1721 | s += 4; | |
1722 | while (s < (char *)RELOC(dt_string_end)) { | |
1723 | if (strcmp(s, str) == 0) | |
1724 | return s - os; | |
1725 | s += strlen(s) + 1; | |
1726 | } | |
1727 | return 0; | |
1728 | } | |
1729 | ||
1730 | /* | |
1731 | * The Open Firmware 1275 specification states properties must be 31 bytes or | |
1732 | * less, however not all firmwares obey this. Make it 64 bytes to be safe. | |
1733 | */ | |
1734 | #define MAX_PROPERTY_NAME 64 | |
1735 | ||
1736 | static void __init scan_dt_build_strings(phandle node, | |
1737 | unsigned long *mem_start, | |
1738 | unsigned long *mem_end) | |
1739 | { | |
1740 | char *prev_name, *namep, *sstart; | |
1741 | unsigned long soff; | |
1742 | phandle child; | |
1743 | ||
1744 | sstart = (char *)RELOC(dt_string_start); | |
1745 | ||
1746 | /* get and store all property names */ | |
1747 | prev_name = RELOC(""); | |
1748 | for (;;) { | |
1749 | /* 64 is max len of name including nul. */ | |
1750 | namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1); | |
1751 | if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) { | |
1752 | /* No more nodes: unwind alloc */ | |
1753 | *mem_start = (unsigned long)namep; | |
1754 | break; | |
1755 | } | |
1756 | ||
1757 | /* skip "name" */ | |
1758 | if (strcmp(namep, RELOC("name")) == 0) { | |
1759 | *mem_start = (unsigned long)namep; | |
1760 | prev_name = RELOC("name"); | |
1761 | continue; | |
1762 | } | |
1763 | /* get/create string entry */ | |
1764 | soff = dt_find_string(namep); | |
1765 | if (soff != 0) { | |
1766 | *mem_start = (unsigned long)namep; | |
1767 | namep = sstart + soff; | |
1768 | } else { | |
1769 | /* Trim off some if we can */ | |
1770 | *mem_start = (unsigned long)namep + strlen(namep) + 1; | |
1771 | RELOC(dt_string_end) = *mem_start; | |
1772 | } | |
1773 | prev_name = namep; | |
1774 | } | |
1775 | ||
1776 | /* do all our children */ | |
1777 | child = call_prom("child", 1, 1, node); | |
1778 | while (child != 0) { | |
1779 | scan_dt_build_strings(child, mem_start, mem_end); | |
1780 | child = call_prom("peer", 1, 1, child); | |
1781 | } | |
1782 | } | |
1783 | ||
1784 | static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start, | |
1785 | unsigned long *mem_end) | |
1786 | { | |
1787 | phandle child; | |
1788 | char *namep, *prev_name, *sstart, *p, *ep, *lp, *path; | |
1789 | unsigned long soff; | |
1790 | unsigned char *valp; | |
1791 | static char pname[MAX_PROPERTY_NAME]; | |
c4988820 | 1792 | int l, room; |
9b6b563c PM |
1793 | |
1794 | dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end); | |
1795 | ||
1796 | /* get the node's full name */ | |
1797 | namep = (char *)*mem_start; | |
c4988820 PM |
1798 | room = *mem_end - *mem_start; |
1799 | if (room > 255) | |
1800 | room = 255; | |
1801 | l = call_prom("package-to-path", 3, 1, node, namep, room); | |
9b6b563c PM |
1802 | if (l >= 0) { |
1803 | /* Didn't fit? Get more room. */ | |
c4988820 PM |
1804 | if (l >= room) { |
1805 | if (l >= *mem_end - *mem_start) | |
1806 | namep = make_room(mem_start, mem_end, l+1, 1); | |
9b6b563c PM |
1807 | call_prom("package-to-path", 3, 1, node, namep, l); |
1808 | } | |
1809 | namep[l] = '\0'; | |
1810 | ||
1811 | /* Fixup an Apple bug where they have bogus \0 chars in the | |
a575b807 PM |
1812 | * middle of the path in some properties, and extract |
1813 | * the unit name (everything after the last '/'). | |
9b6b563c | 1814 | */ |
a575b807 | 1815 | for (lp = p = namep, ep = namep + l; p < ep; p++) { |
9b6b563c | 1816 | if (*p == '/') |
a575b807 PM |
1817 | lp = namep; |
1818 | else if (*p != 0) | |
1819 | *lp++ = *p; | |
1820 | } | |
1821 | *lp = 0; | |
1822 | *mem_start = _ALIGN((unsigned long)lp + 1, 4); | |
9b6b563c PM |
1823 | } |
1824 | ||
1825 | /* get it again for debugging */ | |
1826 | path = RELOC(prom_scratch); | |
1827 | memset(path, 0, PROM_SCRATCH_SIZE); | |
1828 | call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); | |
1829 | ||
1830 | /* get and store all properties */ | |
1831 | prev_name = RELOC(""); | |
1832 | sstart = (char *)RELOC(dt_string_start); | |
1833 | for (;;) { | |
1834 | if (call_prom("nextprop", 3, 1, node, prev_name, | |
1835 | RELOC(pname)) != 1) | |
1836 | break; | |
1837 | ||
1838 | /* skip "name" */ | |
1839 | if (strcmp(RELOC(pname), RELOC("name")) == 0) { | |
1840 | prev_name = RELOC("name"); | |
1841 | continue; | |
1842 | } | |
1843 | ||
1844 | /* find string offset */ | |
1845 | soff = dt_find_string(RELOC(pname)); | |
1846 | if (soff == 0) { | |
1847 | prom_printf("WARNING: Can't find string index for" | |
1848 | " <%s>, node %s\n", RELOC(pname), path); | |
1849 | break; | |
1850 | } | |
1851 | prev_name = sstart + soff; | |
1852 | ||
1853 | /* get length */ | |
1854 | l = call_prom("getproplen", 2, 1, node, RELOC(pname)); | |
1855 | ||
1856 | /* sanity checks */ | |
1857 | if (l == PROM_ERROR) | |
1858 | continue; | |
1859 | if (l > MAX_PROPERTY_LENGTH) { | |
1860 | prom_printf("WARNING: ignoring large property "); | |
1861 | /* It seems OF doesn't null-terminate the path :-( */ | |
1862 | prom_printf("[%s] ", path); | |
1863 | prom_printf("%s length 0x%x\n", RELOC(pname), l); | |
1864 | continue; | |
1865 | } | |
1866 | ||
1867 | /* push property head */ | |
1868 | dt_push_token(OF_DT_PROP, mem_start, mem_end); | |
1869 | dt_push_token(l, mem_start, mem_end); | |
1870 | dt_push_token(soff, mem_start, mem_end); | |
1871 | ||
1872 | /* push property content */ | |
1873 | valp = make_room(mem_start, mem_end, l, 4); | |
1874 | call_prom("getprop", 4, 1, node, RELOC(pname), valp, l); | |
1875 | *mem_start = _ALIGN(*mem_start, 4); | |
1876 | } | |
1877 | ||
1878 | /* Add a "linux,phandle" property. */ | |
1879 | soff = dt_find_string(RELOC("linux,phandle")); | |
1880 | if (soff == 0) | |
1881 | prom_printf("WARNING: Can't find string index for" | |
1882 | " <linux-phandle> node %s\n", path); | |
1883 | else { | |
1884 | dt_push_token(OF_DT_PROP, mem_start, mem_end); | |
1885 | dt_push_token(4, mem_start, mem_end); | |
1886 | dt_push_token(soff, mem_start, mem_end); | |
1887 | valp = make_room(mem_start, mem_end, 4, 4); | |
1888 | *(u32 *)valp = node; | |
1889 | } | |
1890 | ||
1891 | /* do all our children */ | |
1892 | child = call_prom("child", 1, 1, node); | |
1893 | while (child != 0) { | |
1894 | scan_dt_build_struct(child, mem_start, mem_end); | |
1895 | child = call_prom("peer", 1, 1, child); | |
1896 | } | |
1897 | ||
1898 | dt_push_token(OF_DT_END_NODE, mem_start, mem_end); | |
1899 | } | |
1900 | ||
1901 | static void __init flatten_device_tree(void) | |
1902 | { | |
1903 | phandle root; | |
1904 | unsigned long mem_start, mem_end, room; | |
1905 | struct boot_param_header *hdr; | |
1906 | struct prom_t *_prom = &RELOC(prom); | |
1907 | char *namep; | |
1908 | u64 *rsvmap; | |
1909 | ||
1910 | /* | |
1911 | * Check how much room we have between alloc top & bottom (+/- a | |
1912 | * few pages), crop to 4Mb, as this is our "chuck" size | |
1913 | */ | |
1914 | room = RELOC(alloc_top) - RELOC(alloc_bottom) - 0x4000; | |
1915 | if (room > DEVTREE_CHUNK_SIZE) | |
1916 | room = DEVTREE_CHUNK_SIZE; | |
1917 | prom_debug("starting device tree allocs at %x\n", RELOC(alloc_bottom)); | |
1918 | ||
1919 | /* Now try to claim that */ | |
1920 | mem_start = (unsigned long)alloc_up(room, PAGE_SIZE); | |
1921 | if (mem_start == 0) | |
1922 | prom_panic("Can't allocate initial device-tree chunk\n"); | |
1923 | mem_end = RELOC(alloc_top); | |
1924 | ||
1925 | /* Get root of tree */ | |
1926 | root = call_prom("peer", 1, 1, (phandle)0); | |
1927 | if (root == (phandle)0) | |
1928 | prom_panic ("couldn't get device tree root\n"); | |
1929 | ||
1930 | /* Build header and make room for mem rsv map */ | |
1931 | mem_start = _ALIGN(mem_start, 4); | |
1932 | hdr = make_room(&mem_start, &mem_end, | |
1933 | sizeof(struct boot_param_header), 4); | |
1934 | RELOC(dt_header_start) = (unsigned long)hdr; | |
1935 | rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8); | |
1936 | ||
1937 | /* Start of strings */ | |
1938 | mem_start = PAGE_ALIGN(mem_start); | |
1939 | RELOC(dt_string_start) = mem_start; | |
1940 | mem_start += 4; /* hole */ | |
1941 | ||
1942 | /* Add "linux,phandle" in there, we'll need it */ | |
1943 | namep = make_room(&mem_start, &mem_end, 16, 1); | |
1944 | strcpy(namep, RELOC("linux,phandle")); | |
1945 | mem_start = (unsigned long)namep + strlen(namep) + 1; | |
1946 | ||
1947 | /* Build string array */ | |
1948 | prom_printf("Building dt strings...\n"); | |
1949 | scan_dt_build_strings(root, &mem_start, &mem_end); | |
1950 | RELOC(dt_string_end) = mem_start; | |
1951 | ||
1952 | /* Build structure */ | |
1953 | mem_start = PAGE_ALIGN(mem_start); | |
1954 | RELOC(dt_struct_start) = mem_start; | |
1955 | prom_printf("Building dt structure...\n"); | |
1956 | scan_dt_build_struct(root, &mem_start, &mem_end); | |
1957 | dt_push_token(OF_DT_END, &mem_start, &mem_end); | |
1958 | RELOC(dt_struct_end) = PAGE_ALIGN(mem_start); | |
1959 | ||
1960 | /* Finish header */ | |
1961 | hdr->boot_cpuid_phys = _prom->cpu; | |
1962 | hdr->magic = OF_DT_HEADER; | |
1963 | hdr->totalsize = RELOC(dt_struct_end) - RELOC(dt_header_start); | |
1964 | hdr->off_dt_struct = RELOC(dt_struct_start) - RELOC(dt_header_start); | |
1965 | hdr->off_dt_strings = RELOC(dt_string_start) - RELOC(dt_header_start); | |
1966 | hdr->dt_strings_size = RELOC(dt_string_end) - RELOC(dt_string_start); | |
1967 | hdr->off_mem_rsvmap = ((unsigned long)rsvmap) - RELOC(dt_header_start); | |
1968 | hdr->version = OF_DT_VERSION; | |
1969 | /* Version 16 is not backward compatible */ | |
1970 | hdr->last_comp_version = 0x10; | |
1971 | ||
4d1f3f25 | 1972 | /* Copy the reserve map in */ |
9b6b563c PM |
1973 | memcpy(rsvmap, RELOC(mem_reserve_map), sizeof(mem_reserve_map)); |
1974 | ||
1975 | #ifdef DEBUG_PROM | |
1976 | { | |
1977 | int i; | |
1978 | prom_printf("reserved memory map:\n"); | |
1979 | for (i = 0; i < RELOC(mem_reserve_cnt); i++) | |
1980 | prom_printf(" %x - %x\n", | |
1981 | RELOC(mem_reserve_map)[i].base, | |
1982 | RELOC(mem_reserve_map)[i].size); | |
1983 | } | |
1984 | #endif | |
4d1f3f25 JX |
1985 | /* Bump mem_reserve_cnt to cause further reservations to fail |
1986 | * since it's too late. | |
1987 | */ | |
9b6b563c PM |
1988 | RELOC(mem_reserve_cnt) = MEM_RESERVE_MAP_SIZE; |
1989 | ||
1990 | prom_printf("Device tree strings 0x%x -> 0x%x\n", | |
1991 | RELOC(dt_string_start), RELOC(dt_string_end)); | |
1992 | prom_printf("Device tree struct 0x%x -> 0x%x\n", | |
1993 | RELOC(dt_struct_start), RELOC(dt_struct_end)); | |
1994 | ||
1995 | } | |
1996 | ||
54f4ee18 HB |
1997 | #ifdef CONFIG_PPC_MAPLE |
1998 | /* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property. | |
1999 | * The values are bad, and it doesn't even have the right number of cells. */ | |
2000 | static void __init fixup_device_tree_maple(void) | |
9b6b563c | 2001 | { |
54f4ee18 | 2002 | phandle isa; |
980a6513 | 2003 | u32 rloc = 0x01002000; /* IO space; PCI device = 4 */ |
54f4ee18 | 2004 | u32 isa_ranges[6]; |
980a6513 BH |
2005 | char *name; |
2006 | ||
2007 | name = "/ht@0/isa@4"; | |
2008 | isa = call_prom("finddevice", 1, 1, ADDR(name)); | |
2009 | if (!PHANDLE_VALID(isa)) { | |
2010 | name = "/ht@0/isa@6"; | |
2011 | isa = call_prom("finddevice", 1, 1, ADDR(name)); | |
2012 | rloc = 0x01003000; /* IO space; PCI device = 6 */ | |
2013 | } | |
54f4ee18 HB |
2014 | if (!PHANDLE_VALID(isa)) |
2015 | return; | |
2016 | ||
980a6513 BH |
2017 | if (prom_getproplen(isa, "ranges") != 12) |
2018 | return; | |
54f4ee18 HB |
2019 | if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges)) |
2020 | == PROM_ERROR) | |
2021 | return; | |
2022 | ||
2023 | if (isa_ranges[0] != 0x1 || | |
2024 | isa_ranges[1] != 0xf4000000 || | |
2025 | isa_ranges[2] != 0x00010000) | |
2026 | return; | |
2027 | ||
980a6513 | 2028 | prom_printf("Fixing up bogus ISA range on Maple/Apache...\n"); |
54f4ee18 HB |
2029 | |
2030 | isa_ranges[0] = 0x1; | |
2031 | isa_ranges[1] = 0x0; | |
980a6513 | 2032 | isa_ranges[2] = rloc; |
54f4ee18 HB |
2033 | isa_ranges[3] = 0x0; |
2034 | isa_ranges[4] = 0x0; | |
2035 | isa_ranges[5] = 0x00010000; | |
980a6513 | 2036 | prom_setprop(isa, name, "ranges", |
54f4ee18 HB |
2037 | isa_ranges, sizeof(isa_ranges)); |
2038 | } | |
2039 | #else | |
2040 | #define fixup_device_tree_maple() | |
2041 | #endif | |
2042 | ||
e8c0acf9 | 2043 | #ifdef CONFIG_PPC_CHRP |
e4805922 OH |
2044 | /* |
2045 | * Pegasos and BriQ lacks the "ranges" property in the isa node | |
2046 | * Pegasos needs decimal IRQ 14/15, not hexadecimal | |
2047 | */ | |
e8c0acf9 BH |
2048 | static void __init fixup_device_tree_chrp(void) |
2049 | { | |
e4805922 OH |
2050 | phandle ph; |
2051 | u32 prop[6]; | |
26c5032e | 2052 | u32 rloc = 0x01006000; /* IO space; PCI device = 12 */ |
e8c0acf9 BH |
2053 | char *name; |
2054 | int rc; | |
2055 | ||
2056 | name = "/pci@80000000/isa@c"; | |
e4805922 OH |
2057 | ph = call_prom("finddevice", 1, 1, ADDR(name)); |
2058 | if (!PHANDLE_VALID(ph)) { | |
26c5032e | 2059 | name = "/pci@ff500000/isa@6"; |
e4805922 | 2060 | ph = call_prom("finddevice", 1, 1, ADDR(name)); |
26c5032e BH |
2061 | rloc = 0x01003000; /* IO space; PCI device = 6 */ |
2062 | } | |
e4805922 OH |
2063 | if (PHANDLE_VALID(ph)) { |
2064 | rc = prom_getproplen(ph, "ranges"); | |
2065 | if (rc == 0 || rc == PROM_ERROR) { | |
2066 | prom_printf("Fixing up missing ISA range on Pegasos...\n"); | |
2067 | ||
2068 | prop[0] = 0x1; | |
2069 | prop[1] = 0x0; | |
2070 | prop[2] = rloc; | |
2071 | prop[3] = 0x0; | |
2072 | prop[4] = 0x0; | |
2073 | prop[5] = 0x00010000; | |
2074 | prom_setprop(ph, name, "ranges", prop, sizeof(prop)); | |
2075 | } | |
2076 | } | |
e8c0acf9 | 2077 | |
e4805922 OH |
2078 | name = "/pci@80000000/ide@C,1"; |
2079 | ph = call_prom("finddevice", 1, 1, ADDR(name)); | |
2080 | if (PHANDLE_VALID(ph)) { | |
2081 | prom_printf("Fixing up IDE interrupt on Pegasos...\n"); | |
2082 | prop[0] = 14; | |
2083 | prop[1] = 0x0; | |
2084 | prop[2] = 15; | |
2085 | prop[3] = 0x0; | |
2086 | prom_setprop(ph, name, "interrupts", prop, 4*sizeof(u32)); | |
2087 | } | |
e8c0acf9 BH |
2088 | } |
2089 | #else | |
2090 | #define fixup_device_tree_chrp() | |
2091 | #endif | |
2092 | ||
9b6b563c | 2093 | #if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC) |
54f4ee18 HB |
2094 | static void __init fixup_device_tree_pmac(void) |
2095 | { | |
9b6b563c PM |
2096 | phandle u3, i2c, mpic; |
2097 | u32 u3_rev; | |
2098 | u32 interrupts[2]; | |
2099 | u32 parent; | |
2100 | ||
2101 | /* Some G5s have a missing interrupt definition, fix it up here */ | |
2102 | u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000")); | |
2103 | if (!PHANDLE_VALID(u3)) | |
2104 | return; | |
2105 | i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000")); | |
2106 | if (!PHANDLE_VALID(i2c)) | |
2107 | return; | |
2108 | mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000")); | |
2109 | if (!PHANDLE_VALID(mpic)) | |
2110 | return; | |
2111 | ||
2112 | /* check if proper rev of u3 */ | |
2113 | if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev)) | |
2114 | == PROM_ERROR) | |
2115 | return; | |
7d49697e | 2116 | if (u3_rev < 0x35 || u3_rev > 0x39) |
9b6b563c PM |
2117 | return; |
2118 | /* does it need fixup ? */ | |
2119 | if (prom_getproplen(i2c, "interrupts") > 0) | |
2120 | return; | |
2121 | ||
2122 | prom_printf("fixing up bogus interrupts for u3 i2c...\n"); | |
2123 | ||
2124 | /* interrupt on this revision of u3 is number 0 and level */ | |
2125 | interrupts[0] = 0; | |
2126 | interrupts[1] = 1; | |
a23414be PM |
2127 | prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts", |
2128 | &interrupts, sizeof(interrupts)); | |
9b6b563c | 2129 | parent = (u32)mpic; |
a23414be PM |
2130 | prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent", |
2131 | &parent, sizeof(parent)); | |
9b6b563c | 2132 | } |
54f4ee18 HB |
2133 | #else |
2134 | #define fixup_device_tree_pmac() | |
2135 | #endif | |
9b6b563c | 2136 | |
88fd2a9d SM |
2137 | #ifdef CONFIG_PPC_EFIKA |
2138 | /* The current fw of the Efika has a device tree needs quite a few | |
2139 | * fixups to be compliant with the mpc52xx bindings. It's currently | |
2140 | * unknown if it will ever be compliant (come on bPlan ...) so we do fixups. | |
2141 | * NOTE that we (barely) tolerate it because the EFIKA was out before | |
2142 | * the bindings were finished, for any new boards -> RTFM ! */ | |
2143 | ||
2144 | struct subst_entry { | |
2145 | char *path; | |
2146 | char *property; | |
2147 | void *value; | |
2148 | int value_len; | |
2149 | }; | |
2150 | ||
2151 | static void __init fixup_device_tree_efika(void) | |
2152 | { | |
2153 | /* Substitution table */ | |
2154 | #define prop_cstr(x) x, sizeof(x) | |
2155 | int prop_sound_irq[3] = { 2, 2, 0 }; | |
2156 | int prop_bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0, | |
2157 | 3,4,0, 3,5,0, 3,6,0, 3,7,0, | |
2158 | 3,8,0, 3,9,0, 3,10,0, 3,11,0, | |
2159 | 3,12,0, 3,13,0, 3,14,0, 3,15,0 }; | |
2160 | struct subst_entry efika_subst_table[] = { | |
2161 | { "/", "device_type", prop_cstr("efika") }, | |
3a5cc442 | 2162 | { "/builtin", "device_type", prop_cstr("soc") }, |
88fd2a9d SM |
2163 | { "/builtin/ata", "compatible", prop_cstr("mpc5200b-ata\0mpc5200-ata"), }, |
2164 | { "/builtin/bestcomm", "compatible", prop_cstr("mpc5200b-bestcomm\0mpc5200-bestcomm") }, | |
2165 | { "/builtin/bestcomm", "interrupts", prop_bcomm_irq, sizeof(prop_bcomm_irq) }, | |
2166 | { "/builtin/ethernet", "compatible", prop_cstr("mpc5200b-fec\0mpc5200-fec") }, | |
2167 | { "/builtin/pic", "compatible", prop_cstr("mpc5200b-pic\0mpc5200-pic") }, | |
2168 | { "/builtin/serial", "compatible", prop_cstr("mpc5200b-psc-uart\0mpc5200-psc-uart") }, | |
2169 | { "/builtin/sound", "compatible", prop_cstr("mpc5200b-psc-ac97\0mpc5200-psc-ac97") }, | |
2170 | { "/builtin/sound", "interrupts", prop_sound_irq, sizeof(prop_sound_irq) }, | |
2171 | { "/builtin/sram", "compatible", prop_cstr("mpc5200b-sram\0mpc5200-sram") }, | |
2172 | { "/builtin/sram", "device_type", prop_cstr("sram") }, | |
2173 | {} | |
2174 | }; | |
2175 | #undef prop_cstr | |
2176 | ||
2177 | /* Vars */ | |
2178 | u32 node; | |
2179 | char prop[64]; | |
2180 | int rv, i; | |
2181 | ||
2182 | /* Check if we're really running on a EFIKA */ | |
2183 | node = call_prom("finddevice", 1, 1, ADDR("/")); | |
2184 | if (!PHANDLE_VALID(node)) | |
2185 | return; | |
2186 | ||
2187 | rv = prom_getprop(node, "model", prop, sizeof(prop)); | |
2188 | if (rv == PROM_ERROR) | |
2189 | return; | |
2190 | if (strcmp(prop, "EFIKA5K2")) | |
2191 | return; | |
2192 | ||
2193 | prom_printf("Applying EFIKA device tree fixups\n"); | |
2194 | ||
2195 | /* Process substitution table */ | |
2196 | for (i=0; efika_subst_table[i].path; i++) { | |
2197 | struct subst_entry *se = &efika_subst_table[i]; | |
2198 | ||
2199 | node = call_prom("finddevice", 1, 1, ADDR(se->path)); | |
2200 | if (!PHANDLE_VALID(node)) { | |
2201 | prom_printf("fixup_device_tree_efika: ", | |
2202 | "skipped entry %x - not found\n", i); | |
2203 | continue; | |
2204 | } | |
2205 | ||
2206 | rv = prom_setprop(node, se->path, se->property, | |
2207 | se->value, se->value_len ); | |
2208 | if (rv == PROM_ERROR) | |
2209 | prom_printf("fixup_device_tree_efika: ", | |
2210 | "skipped entry %x - setprop error\n", i); | |
2211 | } | |
2212 | } | |
2213 | #else | |
2214 | #define fixup_device_tree_efika() | |
2215 | #endif | |
2216 | ||
54f4ee18 HB |
2217 | static void __init fixup_device_tree(void) |
2218 | { | |
2219 | fixup_device_tree_maple(); | |
e8c0acf9 | 2220 | fixup_device_tree_chrp(); |
54f4ee18 | 2221 | fixup_device_tree_pmac(); |
88fd2a9d | 2222 | fixup_device_tree_efika(); |
54f4ee18 | 2223 | } |
9b6b563c PM |
2224 | |
2225 | static void __init prom_find_boot_cpu(void) | |
2226 | { | |
2227 | struct prom_t *_prom = &RELOC(prom); | |
2228 | u32 getprop_rval; | |
2229 | ihandle prom_cpu; | |
2230 | phandle cpu_pkg; | |
2231 | ||
a575b807 | 2232 | _prom->cpu = 0; |
9b6b563c | 2233 | if (prom_getprop(_prom->chosen, "cpu", &prom_cpu, sizeof(prom_cpu)) <= 0) |
a575b807 | 2234 | return; |
9b6b563c PM |
2235 | |
2236 | cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu); | |
2237 | ||
2238 | prom_getprop(cpu_pkg, "reg", &getprop_rval, sizeof(getprop_rval)); | |
2239 | _prom->cpu = getprop_rval; | |
2240 | ||
2241 | prom_debug("Booting CPU hw index = 0x%x\n", _prom->cpu); | |
2242 | } | |
2243 | ||
2244 | static void __init prom_check_initrd(unsigned long r3, unsigned long r4) | |
2245 | { | |
2246 | #ifdef CONFIG_BLK_DEV_INITRD | |
2247 | struct prom_t *_prom = &RELOC(prom); | |
2248 | ||
2249 | if (r3 && r4 && r4 != 0xdeadbeef) { | |
2250 | unsigned long val; | |
2251 | ||
51fae6de | 2252 | RELOC(prom_initrd_start) = is_kernel_addr(r3) ? __pa(r3) : r3; |
9b6b563c PM |
2253 | RELOC(prom_initrd_end) = RELOC(prom_initrd_start) + r4; |
2254 | ||
2255 | val = RELOC(prom_initrd_start); | |
a23414be PM |
2256 | prom_setprop(_prom->chosen, "/chosen", "linux,initrd-start", |
2257 | &val, sizeof(val)); | |
9b6b563c | 2258 | val = RELOC(prom_initrd_end); |
a23414be PM |
2259 | prom_setprop(_prom->chosen, "/chosen", "linux,initrd-end", |
2260 | &val, sizeof(val)); | |
9b6b563c PM |
2261 | |
2262 | reserve_mem(RELOC(prom_initrd_start), | |
2263 | RELOC(prom_initrd_end) - RELOC(prom_initrd_start)); | |
2264 | ||
2265 | prom_debug("initrd_start=0x%x\n", RELOC(prom_initrd_start)); | |
2266 | prom_debug("initrd_end=0x%x\n", RELOC(prom_initrd_end)); | |
2267 | } | |
2268 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
2269 | } | |
2270 | ||
2271 | /* | |
2272 | * We enter here early on, when the Open Firmware prom is still | |
2273 | * handling exceptions and the MMU hash table for us. | |
2274 | */ | |
2275 | ||
2276 | unsigned long __init prom_init(unsigned long r3, unsigned long r4, | |
2277 | unsigned long pp, | |
2278 | unsigned long r6, unsigned long r7) | |
2279 | { | |
2280 | struct prom_t *_prom; | |
9b6b563c | 2281 | unsigned long hdr; |
b42b6617 | 2282 | unsigned long offset = reloc_offset(); |
9b6b563c PM |
2283 | |
2284 | #ifdef CONFIG_PPC32 | |
9b6b563c PM |
2285 | reloc_got2(offset); |
2286 | #endif | |
2287 | ||
2288 | _prom = &RELOC(prom); | |
2289 | ||
2290 | /* | |
2291 | * First zero the BSS | |
2292 | */ | |
2293 | memset(&RELOC(__bss_start), 0, __bss_stop - __bss_start); | |
2294 | ||
2295 | /* | |
2296 | * Init interface to Open Firmware, get some node references, | |
2297 | * like /chosen | |
2298 | */ | |
2299 | prom_init_client_services(pp); | |
2300 | ||
2301 | /* | |
a23414be PM |
2302 | * See if this OF is old enough that we need to do explicit maps |
2303 | * and other workarounds | |
9b6b563c | 2304 | */ |
a23414be | 2305 | prom_find_mmu(); |
9b6b563c | 2306 | |
a575b807 | 2307 | /* |
a23414be | 2308 | * Init prom stdout device |
a575b807 | 2309 | */ |
a23414be | 2310 | prom_init_stdout(); |
a575b807 | 2311 | |
9b6b563c PM |
2312 | /* |
2313 | * Get default machine type. At this point, we do not differentiate | |
2314 | * between pSeries SMP and pSeries LPAR | |
2315 | */ | |
2316 | RELOC(of_platform) = prom_find_machine_type(); | |
9b6b563c | 2317 | |
add60ef3 OH |
2318 | /* Bail if this is a kdump kernel. */ |
2319 | if (PHYSICAL_START > 0) | |
2320 | prom_panic("Error: You can't boot a kdump kernel from OF!\n"); | |
2321 | ||
2322 | /* | |
2323 | * Check for an initrd | |
2324 | */ | |
2325 | prom_check_initrd(r3, r4); | |
2326 | ||
9b6b563c PM |
2327 | #ifdef CONFIG_PPC_PSERIES |
2328 | /* | |
2329 | * On pSeries, inform the firmware about our capabilities | |
2330 | */ | |
799d6046 PM |
2331 | if (RELOC(of_platform) == PLATFORM_PSERIES || |
2332 | RELOC(of_platform) == PLATFORM_PSERIES_LPAR) | |
9b6b563c PM |
2333 | prom_send_capabilities(); |
2334 | #endif | |
2335 | ||
9b6b563c | 2336 | /* |
f3f66f59 | 2337 | * Copy the CPU hold code |
9b6b563c | 2338 | */ |
55d36339 | 2339 | if (RELOC(of_platform) != PLATFORM_POWERMAC) |
5a408329 | 2340 | copy_and_flush(0, KERNELBASE + offset, 0x100, 0); |
9b6b563c PM |
2341 | |
2342 | /* | |
2343 | * Do early parsing of command line | |
2344 | */ | |
2345 | early_cmdline_parse(); | |
2346 | ||
2347 | /* | |
2348 | * Initialize memory management within prom_init | |
2349 | */ | |
2350 | prom_init_mem(); | |
2351 | ||
2352 | /* | |
2353 | * Determine which cpu is actually running right _now_ | |
2354 | */ | |
2355 | prom_find_boot_cpu(); | |
2356 | ||
2357 | /* | |
2358 | * Initialize display devices | |
2359 | */ | |
2360 | prom_check_displays(); | |
2361 | ||
2362 | #ifdef CONFIG_PPC64 | |
2363 | /* | |
2364 | * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else | |
2365 | * that uses the allocator, we need to make sure we get the top of memory | |
2366 | * available for us here... | |
2367 | */ | |
2368 | if (RELOC(of_platform) == PLATFORM_PSERIES) | |
2369 | prom_initialize_tce_table(); | |
2370 | #endif | |
2371 | ||
2372 | /* | |
2373 | * On non-powermacs, try to instantiate RTAS and puts all CPUs | |
2374 | * in spin-loops. PowerMacs don't have a working RTAS and use | |
2375 | * a different way to spin CPUs | |
2376 | */ | |
2377 | if (RELOC(of_platform) != PLATFORM_POWERMAC) { | |
2378 | prom_instantiate_rtas(); | |
2379 | prom_hold_cpus(); | |
2380 | } | |
2381 | ||
2382 | /* | |
2383 | * Fill in some infos for use by the kernel later on | |
2384 | */ | |
9b6b563c | 2385 | #ifdef CONFIG_PPC64 |
165785e5 | 2386 | if (RELOC(prom_iommu_off)) |
a23414be PM |
2387 | prom_setprop(_prom->chosen, "/chosen", "linux,iommu-off", |
2388 | NULL, 0); | |
9b6b563c | 2389 | |
165785e5 | 2390 | if (RELOC(prom_iommu_force_on)) |
a23414be PM |
2391 | prom_setprop(_prom->chosen, "/chosen", "linux,iommu-force-on", |
2392 | NULL, 0); | |
9b6b563c PM |
2393 | |
2394 | if (RELOC(prom_tce_alloc_start)) { | |
a23414be | 2395 | prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-start", |
9b6b563c PM |
2396 | &RELOC(prom_tce_alloc_start), |
2397 | sizeof(prom_tce_alloc_start)); | |
a23414be | 2398 | prom_setprop(_prom->chosen, "/chosen", "linux,tce-alloc-end", |
9b6b563c PM |
2399 | &RELOC(prom_tce_alloc_end), |
2400 | sizeof(prom_tce_alloc_end)); | |
2401 | } | |
2402 | #endif | |
2403 | ||
2404 | /* | |
2405 | * Fixup any known bugs in the device-tree | |
2406 | */ | |
2407 | fixup_device_tree(); | |
2408 | ||
2409 | /* | |
2410 | * Now finally create the flattened device-tree | |
2411 | */ | |
2412 | prom_printf("copying OF device tree ...\n"); | |
2413 | flatten_device_tree(); | |
2414 | ||
3825ac0e PM |
2415 | /* |
2416 | * in case stdin is USB and still active on IBM machines... | |
2417 | * Unfortunately quiesce crashes on some powermacs if we have | |
2418 | * closed stdin already (in particular the powerbook 101). | |
2419 | */ | |
2420 | if (RELOC(of_platform) != PLATFORM_POWERMAC) | |
2421 | prom_close_stdin(); | |
9b6b563c PM |
2422 | |
2423 | /* | |
2424 | * Call OF "quiesce" method to shut down pending DMA's from | |
2425 | * devices etc... | |
2426 | */ | |
2427 | prom_printf("Calling quiesce ...\n"); | |
2428 | call_prom("quiesce", 0, 0); | |
2429 | ||
2430 | /* | |
2431 | * And finally, call the kernel passing it the flattened device | |
2432 | * tree and NULL as r5, thus triggering the new entry point which | |
2433 | * is common to us and kexec | |
2434 | */ | |
2435 | hdr = RELOC(dt_header_start); | |
2436 | prom_printf("returning from prom_init\n"); | |
2437 | prom_debug("->dt_header_start=0x%x\n", hdr); | |
2438 | ||
2439 | #ifdef CONFIG_PPC32 | |
2440 | reloc_got2(-offset); | |
2441 | #endif | |
2442 | ||
35499c01 | 2443 | __start(hdr, KERNELBASE + offset, 0); |
9b6b563c PM |
2444 | |
2445 | return 0; | |
2446 | } |