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 | ||
054f367a DA |
18 | /* we cannot use FORTIFY as it brings in new symbols */ |
19 | #define __NO_FORTIFY | |
20 | ||
9b6b563c | 21 | #include <stdarg.h> |
9b6b563c PM |
22 | #include <linux/kernel.h> |
23 | #include <linux/string.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/threads.h> | |
26 | #include <linux/spinlock.h> | |
27 | #include <linux/types.h> | |
28 | #include <linux/pci.h> | |
29 | #include <linux/proc_fs.h> | |
9b6b563c PM |
30 | #include <linux/delay.h> |
31 | #include <linux/initrd.h> | |
32 | #include <linux/bitops.h> | |
33 | #include <asm/prom.h> | |
34 | #include <asm/rtas.h> | |
35 | #include <asm/page.h> | |
36 | #include <asm/processor.h> | |
37 | #include <asm/irq.h> | |
38 | #include <asm/io.h> | |
39 | #include <asm/smp.h> | |
9b6b563c PM |
40 | #include <asm/mmu.h> |
41 | #include <asm/pgtable.h> | |
9b6b563c | 42 | #include <asm/iommu.h> |
9b6b563c PM |
43 | #include <asm/btext.h> |
44 | #include <asm/sections.h> | |
45 | #include <asm/machdep.h> | |
0545d543 | 46 | #include <asm/asm-prototypes.h> |
9b6b563c | 47 | |
9b6b563c | 48 | #include <linux/linux_logo.h> |
9b6b563c | 49 | |
e63334e5 | 50 | /* All of prom_init bss lives here */ |
5f69e388 | 51 | #define __prombss __section(.bss.prominit) |
e63334e5 | 52 | |
9b6b563c PM |
53 | /* |
54 | * Eventually bump that one up | |
55 | */ | |
56 | #define DEVTREE_CHUNK_SIZE 0x100000 | |
57 | ||
58 | /* | |
59 | * This is the size of the local memory reserve map that gets copied | |
60 | * into the boot params passed to the kernel. That size is totally | |
61 | * flexible as the kernel just reads the list until it encounters an | |
62 | * entry with size 0, so it can be changed without breaking binary | |
63 | * compatibility | |
64 | */ | |
65 | #define MEM_RESERVE_MAP_SIZE 8 | |
66 | ||
67 | /* | |
68 | * prom_init() is called very early on, before the kernel text | |
69 | * and data have been mapped to KERNELBASE. At this point the code | |
70 | * is running at whatever address it has been loaded at. | |
71 | * On ppc32 we compile with -mrelocatable, which means that references | |
72 | * to extern and static variables get relocated automatically. | |
5ac47f7a AB |
73 | * ppc64 objects are always relocatable, we just need to relocate the |
74 | * TOC. | |
9b6b563c PM |
75 | * |
76 | * Because OF may have mapped I/O devices into the area starting at | |
77 | * KERNELBASE, particularly on CHRP machines, we can't safely call | |
78 | * OF once the kernel has been mapped to KERNELBASE. Therefore all | |
79 | * OF calls must be done within prom_init(). | |
80 | * | |
81 | * ADDR is used in calls to call_prom. The 4th and following | |
82 | * arguments to call_prom should be 32-bit values. | |
83 | * On ppc64, 64 bit values are truncated to 32 bits (and | |
84 | * fortunately don't get interpreted as two arguments). | |
85 | */ | |
5ac47f7a AB |
86 | #define ADDR(x) (u32)(unsigned long)(x) |
87 | ||
9b6b563c | 88 | #ifdef CONFIG_PPC64 |
a23414be | 89 | #define OF_WORKAROUNDS 0 |
9b6b563c | 90 | #else |
a23414be | 91 | #define OF_WORKAROUNDS of_workarounds |
e63334e5 | 92 | static int of_workarounds __prombss; |
9b6b563c PM |
93 | #endif |
94 | ||
a23414be PM |
95 | #define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */ |
96 | #define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */ | |
97 | ||
9b6b563c PM |
98 | #define PROM_BUG() do { \ |
99 | prom_printf("kernel BUG at %s line 0x%x!\n", \ | |
5827d416 | 100 | __FILE__, __LINE__); \ |
9b6b563c PM |
101 | __asm__ __volatile__(".long " BUG_ILLEGAL_INSTR); \ |
102 | } while (0) | |
103 | ||
104 | #ifdef DEBUG_PROM | |
105 | #define prom_debug(x...) prom_printf(x) | |
106 | #else | |
85aa4b98 | 107 | #define prom_debug(x...) do { } while (0) |
9b6b563c PM |
108 | #endif |
109 | ||
9b6b563c PM |
110 | |
111 | typedef u32 prom_arg_t; | |
112 | ||
113 | struct prom_args { | |
493adffc BH |
114 | __be32 service; |
115 | __be32 nargs; | |
116 | __be32 nret; | |
117 | __be32 args[10]; | |
9b6b563c PM |
118 | }; |
119 | ||
120 | struct prom_t { | |
121 | ihandle root; | |
a23414be | 122 | phandle chosen; |
9b6b563c PM |
123 | int cpu; |
124 | ihandle stdout; | |
a575b807 | 125 | ihandle mmumap; |
a23414be | 126 | ihandle memory; |
9b6b563c PM |
127 | }; |
128 | ||
129 | struct mem_map_entry { | |
493adffc BH |
130 | __be64 base; |
131 | __be64 size; | |
9b6b563c PM |
132 | }; |
133 | ||
493adffc | 134 | typedef __be32 cell_t; |
9b6b563c | 135 | |
6e35d5da BH |
136 | extern void __start(unsigned long r3, unsigned long r4, unsigned long r5, |
137 | unsigned long r6, unsigned long r7, unsigned long r8, | |
138 | unsigned long r9); | |
9b6b563c PM |
139 | |
140 | #ifdef CONFIG_PPC64 | |
c4988820 | 141 | extern int enter_prom(struct prom_args *args, unsigned long entry); |
9b6b563c | 142 | #else |
c4988820 | 143 | static inline int enter_prom(struct prom_args *args, unsigned long entry) |
9b6b563c | 144 | { |
c4988820 | 145 | return ((int (*)(struct prom_args *))entry)(args); |
9b6b563c PM |
146 | } |
147 | #endif | |
148 | ||
149 | extern void copy_and_flush(unsigned long dest, unsigned long src, | |
150 | unsigned long size, unsigned long offset); | |
151 | ||
152 | /* prom structure */ | |
e63334e5 | 153 | static struct prom_t __prombss prom; |
9b6b563c | 154 | |
e63334e5 | 155 | static unsigned long __prombss prom_entry; |
9b6b563c PM |
156 | |
157 | #define PROM_SCRATCH_SIZE 256 | |
158 | ||
e63334e5 BH |
159 | static char __prombss of_stdout_device[256]; |
160 | static char __prombss prom_scratch[PROM_SCRATCH_SIZE]; | |
9b6b563c | 161 | |
e63334e5 BH |
162 | static unsigned long __prombss dt_header_start; |
163 | static unsigned long __prombss dt_struct_start, dt_struct_end; | |
164 | static unsigned long __prombss dt_string_start, dt_string_end; | |
9b6b563c | 165 | |
e63334e5 | 166 | static unsigned long __prombss prom_initrd_start, prom_initrd_end; |
9b6b563c PM |
167 | |
168 | #ifdef CONFIG_PPC64 | |
e63334e5 BH |
169 | static int __prombss prom_iommu_force_on; |
170 | static int __prombss prom_iommu_off; | |
171 | static unsigned long __prombss prom_tce_alloc_start; | |
172 | static unsigned long __prombss prom_tce_alloc_end; | |
9b6b563c PM |
173 | #endif |
174 | ||
c886087c | 175 | #ifdef CONFIG_PPC_PSERIES |
8ca2d515 | 176 | static bool __prombss prom_radix_disable; |
c886087c | 177 | #endif |
014d02cb SJS |
178 | |
179 | struct platform_support { | |
180 | bool hash_mmu; | |
181 | bool radix_mmu; | |
182 | bool radix_gtse; | |
ac5e5a54 | 183 | bool xive; |
014d02cb SJS |
184 | }; |
185 | ||
e8222502 BH |
186 | /* Platforms codes are now obsolete in the kernel. Now only used within this |
187 | * file and ultimately gone too. Feel free to change them if you need, they | |
188 | * are not shared with anything outside of this file anymore | |
189 | */ | |
190 | #define PLATFORM_PSERIES 0x0100 | |
191 | #define PLATFORM_PSERIES_LPAR 0x0101 | |
192 | #define PLATFORM_LPAR 0x0001 | |
193 | #define PLATFORM_POWERMAC 0x0400 | |
194 | #define PLATFORM_GENERIC 0x0500 | |
195 | ||
e63334e5 | 196 | static int __prombss of_platform; |
9b6b563c | 197 | |
e63334e5 | 198 | static char __prombss prom_cmd_line[COMMAND_LINE_SIZE]; |
9b6b563c | 199 | |
e63334e5 | 200 | static unsigned long __prombss prom_memory_limit; |
cf68787b | 201 | |
e63334e5 BH |
202 | static unsigned long __prombss alloc_top; |
203 | static unsigned long __prombss alloc_top_high; | |
204 | static unsigned long __prombss alloc_bottom; | |
205 | static unsigned long __prombss rmo_top; | |
206 | static unsigned long __prombss ram_top; | |
9b6b563c | 207 | |
e63334e5 BH |
208 | static struct mem_map_entry __prombss mem_reserve_map[MEM_RESERVE_MAP_SIZE]; |
209 | static int __prombss mem_reserve_cnt; | |
9b6b563c | 210 | |
e63334e5 | 211 | static cell_t __prombss regbuf[1024]; |
9b6b563c | 212 | |
8ca2d515 | 213 | static bool __prombss rtas_has_query_cpu_stopped; |
dbe78b40 | 214 | |
9b6b563c | 215 | |
9b6b563c PM |
216 | /* |
217 | * Error results ... some OF calls will return "-1" on error, some | |
218 | * will return 0, some will return either. To simplify, here are | |
219 | * macros to use with any ihandle or phandle return value to check if | |
220 | * it is valid | |
221 | */ | |
222 | ||
223 | #define PROM_ERROR (-1u) | |
224 | #define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR) | |
225 | #define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR) | |
226 | ||
227 | ||
228 | /* This is the one and *ONLY* place where we actually call open | |
229 | * firmware. | |
230 | */ | |
231 | ||
232 | static int __init call_prom(const char *service, int nargs, int nret, ...) | |
233 | { | |
234 | int i; | |
235 | struct prom_args args; | |
236 | va_list list; | |
237 | ||
493adffc BH |
238 | args.service = cpu_to_be32(ADDR(service)); |
239 | args.nargs = cpu_to_be32(nargs); | |
240 | args.nret = cpu_to_be32(nret); | |
9b6b563c PM |
241 | |
242 | va_start(list, nret); | |
243 | for (i = 0; i < nargs; i++) | |
493adffc | 244 | args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t)); |
9b6b563c PM |
245 | va_end(list); |
246 | ||
247 | for (i = 0; i < nret; i++) | |
248 | args.args[nargs+i] = 0; | |
249 | ||
5827d416 | 250 | if (enter_prom(&args, prom_entry) < 0) |
c4988820 | 251 | return PROM_ERROR; |
9b6b563c | 252 | |
493adffc | 253 | return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0; |
9b6b563c PM |
254 | } |
255 | ||
256 | static int __init call_prom_ret(const char *service, int nargs, int nret, | |
257 | prom_arg_t *rets, ...) | |
258 | { | |
259 | int i; | |
260 | struct prom_args args; | |
261 | va_list list; | |
262 | ||
493adffc BH |
263 | args.service = cpu_to_be32(ADDR(service)); |
264 | args.nargs = cpu_to_be32(nargs); | |
265 | args.nret = cpu_to_be32(nret); | |
9b6b563c PM |
266 | |
267 | va_start(list, rets); | |
268 | for (i = 0; i < nargs; i++) | |
493adffc | 269 | args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t)); |
9b6b563c PM |
270 | va_end(list); |
271 | ||
272 | for (i = 0; i < nret; i++) | |
ed1189b7 | 273 | args.args[nargs+i] = 0; |
9b6b563c | 274 | |
5827d416 | 275 | if (enter_prom(&args, prom_entry) < 0) |
c4988820 | 276 | return PROM_ERROR; |
9b6b563c PM |
277 | |
278 | if (rets != NULL) | |
279 | for (i = 1; i < nret; ++i) | |
493adffc | 280 | rets[i-1] = be32_to_cpu(args.args[nargs+i]); |
9b6b563c | 281 | |
493adffc | 282 | return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0; |
9b6b563c PM |
283 | } |
284 | ||
285 | ||
9b6b563c PM |
286 | static void __init prom_print(const char *msg) |
287 | { | |
288 | const char *p, *q; | |
9b6b563c | 289 | |
5827d416 | 290 | if (prom.stdout == 0) |
9b6b563c PM |
291 | return; |
292 | ||
293 | for (p = msg; *p != 0; p = q) { | |
294 | for (q = p; *q != 0 && *q != '\n'; ++q) | |
295 | ; | |
296 | if (q > p) | |
5827d416 | 297 | call_prom("write", 3, 1, prom.stdout, p, q - p); |
9b6b563c PM |
298 | if (*q == 0) |
299 | break; | |
300 | ++q; | |
5827d416 | 301 | call_prom("write", 3, 1, prom.stdout, ADDR("\r\n"), 2); |
9b6b563c PM |
302 | } |
303 | } | |
304 | ||
305 | ||
8af1da40 MM |
306 | /* |
307 | * Both prom_print_hex & prom_print_dec takes an unsigned long as input so that | |
308 | * we do not need __udivdi3 or __umoddi3 on 32bits. | |
309 | */ | |
9b6b563c PM |
310 | static void __init prom_print_hex(unsigned long val) |
311 | { | |
312 | int i, nibbles = sizeof(val)*2; | |
313 | char buf[sizeof(val)*2+1]; | |
9b6b563c PM |
314 | |
315 | for (i = nibbles-1; i >= 0; i--) { | |
316 | buf[i] = (val & 0xf) + '0'; | |
317 | if (buf[i] > '9') | |
318 | buf[i] += ('a'-'0'-10); | |
319 | val >>= 4; | |
320 | } | |
321 | buf[nibbles] = '\0'; | |
5827d416 | 322 | call_prom("write", 3, 1, prom.stdout, buf, nibbles); |
9b6b563c PM |
323 | } |
324 | ||
2c48a7d6 MN |
325 | /* max number of decimal digits in an unsigned long */ |
326 | #define UL_DIGITS 21 | |
327 | static void __init prom_print_dec(unsigned long val) | |
328 | { | |
329 | int i, size; | |
330 | char buf[UL_DIGITS+1]; | |
2c48a7d6 MN |
331 | |
332 | for (i = UL_DIGITS-1; i >= 0; i--) { | |
333 | buf[i] = (val % 10) + '0'; | |
334 | val = val/10; | |
335 | if (val == 0) | |
336 | break; | |
337 | } | |
338 | /* shift stuff down */ | |
339 | size = UL_DIGITS - i; | |
5827d416 | 340 | call_prom("write", 3, 1, prom.stdout, buf+i, size); |
2c48a7d6 | 341 | } |
9b6b563c | 342 | |
eae5f709 | 343 | __printf(1, 2) |
9b6b563c PM |
344 | static void __init prom_printf(const char *format, ...) |
345 | { | |
346 | const char *p, *q, *s; | |
347 | va_list args; | |
348 | unsigned long v; | |
af277149 | 349 | long vs; |
8af1da40 | 350 | int n = 0; |
9b6b563c PM |
351 | |
352 | va_start(args, format); | |
9b6b563c PM |
353 | for (p = format; *p != 0; p = q) { |
354 | for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q) | |
355 | ; | |
356 | if (q > p) | |
5827d416 | 357 | call_prom("write", 3, 1, prom.stdout, p, q - p); |
9b6b563c PM |
358 | if (*q == 0) |
359 | break; | |
360 | if (*q == '\n') { | |
361 | ++q; | |
5827d416 | 362 | call_prom("write", 3, 1, prom.stdout, |
9b6b563c PM |
363 | ADDR("\r\n"), 2); |
364 | continue; | |
365 | } | |
366 | ++q; | |
367 | if (*q == 0) | |
368 | break; | |
8af1da40 MM |
369 | while (*q == 'l') { |
370 | ++q; | |
371 | ++n; | |
372 | } | |
9b6b563c PM |
373 | switch (*q) { |
374 | case 's': | |
375 | ++q; | |
376 | s = va_arg(args, const char *); | |
377 | prom_print(s); | |
378 | break; | |
379 | case 'x': | |
380 | ++q; | |
8af1da40 MM |
381 | switch (n) { |
382 | case 0: | |
383 | v = va_arg(args, unsigned int); | |
384 | break; | |
385 | case 1: | |
386 | v = va_arg(args, unsigned long); | |
387 | break; | |
388 | case 2: | |
389 | default: | |
390 | v = va_arg(args, unsigned long long); | |
391 | break; | |
392 | } | |
9b6b563c PM |
393 | prom_print_hex(v); |
394 | break; | |
8af1da40 | 395 | case 'u': |
af277149 | 396 | ++q; |
8af1da40 MM |
397 | switch (n) { |
398 | case 0: | |
399 | v = va_arg(args, unsigned int); | |
400 | break; | |
401 | case 1: | |
402 | v = va_arg(args, unsigned long); | |
403 | break; | |
404 | case 2: | |
405 | default: | |
406 | v = va_arg(args, unsigned long long); | |
407 | break; | |
af277149 | 408 | } |
8af1da40 | 409 | prom_print_dec(v); |
af277149 | 410 | break; |
8af1da40 | 411 | case 'd': |
2c48a7d6 | 412 | ++q; |
8af1da40 MM |
413 | switch (n) { |
414 | case 0: | |
415 | vs = va_arg(args, int); | |
af277149 | 416 | break; |
8af1da40 | 417 | case 1: |
af277149 | 418 | vs = va_arg(args, long); |
8af1da40 MM |
419 | break; |
420 | case 2: | |
421 | default: | |
422 | vs = va_arg(args, long long); | |
423 | break; | |
2c48a7d6 | 424 | } |
8af1da40 MM |
425 | if (vs < 0) { |
426 | prom_print("-"); | |
427 | vs = -vs; | |
428 | } | |
429 | prom_print_dec(vs); | |
2c48a7d6 | 430 | break; |
9b6b563c PM |
431 | } |
432 | } | |
1b855e16 | 433 | va_end(args); |
9b6b563c PM |
434 | } |
435 | ||
436 | ||
a575b807 PM |
437 | static unsigned int __init prom_claim(unsigned long virt, unsigned long size, |
438 | unsigned long align) | |
439 | { | |
a575b807 | 440 | |
a23414be PM |
441 | if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) { |
442 | /* | |
443 | * Old OF requires we claim physical and virtual separately | |
444 | * and then map explicitly (assuming virtual mode) | |
445 | */ | |
446 | int ret; | |
447 | prom_arg_t result; | |
448 | ||
449 | ret = call_prom_ret("call-method", 5, 2, &result, | |
5827d416 | 450 | ADDR("claim"), prom.memory, |
a23414be PM |
451 | align, size, virt); |
452 | if (ret != 0 || result == -1) | |
453 | return -1; | |
454 | ret = call_prom_ret("call-method", 5, 2, &result, | |
5827d416 | 455 | ADDR("claim"), prom.mmumap, |
a23414be PM |
456 | align, size, virt); |
457 | if (ret != 0) { | |
458 | call_prom("call-method", 4, 1, ADDR("release"), | |
5827d416 | 459 | prom.memory, size, virt); |
a23414be PM |
460 | return -1; |
461 | } | |
462 | /* the 0x12 is M (coherence) + PP == read/write */ | |
a575b807 | 463 | call_prom("call-method", 6, 1, |
5827d416 | 464 | ADDR("map"), prom.mmumap, 0x12, size, virt, virt); |
a23414be PM |
465 | return virt; |
466 | } | |
467 | return call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size, | |
468 | (prom_arg_t)align); | |
a575b807 PM |
469 | } |
470 | ||
9b6b563c PM |
471 | static void __init __attribute__((noreturn)) prom_panic(const char *reason) |
472 | { | |
9b6b563c | 473 | prom_print(reason); |
add60ef3 OH |
474 | /* Do not call exit because it clears the screen on pmac |
475 | * it also causes some sort of double-fault on early pmacs */ | |
5827d416 | 476 | if (of_platform == PLATFORM_POWERMAC) |
add60ef3 OH |
477 | asm("trap\n"); |
478 | ||
1d9a4731 | 479 | /* ToDo: should put up an SRC here on pSeries */ |
9b6b563c PM |
480 | call_prom("exit", 0, 0); |
481 | ||
482 | for (;;) /* should never get here */ | |
483 | ; | |
484 | } | |
485 | ||
486 | ||
487 | static int __init prom_next_node(phandle *nodep) | |
488 | { | |
489 | phandle node; | |
490 | ||
491 | if ((node = *nodep) != 0 | |
492 | && (*nodep = call_prom("child", 1, 1, node)) != 0) | |
493 | return 1; | |
494 | if ((*nodep = call_prom("peer", 1, 1, node)) != 0) | |
495 | return 1; | |
496 | for (;;) { | |
497 | if ((node = call_prom("parent", 1, 1, node)) == 0) | |
498 | return 0; | |
499 | if ((*nodep = call_prom("peer", 1, 1, node)) != 0) | |
500 | return 1; | |
501 | } | |
502 | } | |
503 | ||
60d862e5 | 504 | static inline int prom_getprop(phandle node, const char *pname, |
9b6b563c PM |
505 | void *value, size_t valuelen) |
506 | { | |
507 | return call_prom("getprop", 4, 1, node, ADDR(pname), | |
508 | (u32)(unsigned long) value, (u32) valuelen); | |
509 | } | |
510 | ||
60d862e5 | 511 | static inline int prom_getproplen(phandle node, const char *pname) |
9b6b563c PM |
512 | { |
513 | return call_prom("getproplen", 2, 1, node, ADDR(pname)); | |
514 | } | |
515 | ||
a23414be | 516 | static void add_string(char **str, const char *q) |
9b6b563c | 517 | { |
a23414be PM |
518 | char *p = *str; |
519 | ||
520 | while (*q) | |
521 | *p++ = *q++; | |
522 | *p++ = ' '; | |
523 | *str = p; | |
524 | } | |
525 | ||
526 | static char *tohex(unsigned int x) | |
527 | { | |
8ca2d515 BH |
528 | static const char digits[] __initconst = "0123456789abcdef"; |
529 | static char result[9] __prombss; | |
a23414be PM |
530 | int i; |
531 | ||
532 | result[8] = 0; | |
533 | i = 8; | |
534 | do { | |
535 | --i; | |
536 | result[i] = digits[x & 0xf]; | |
537 | x >>= 4; | |
538 | } while (x != 0 && i > 0); | |
539 | return &result[i]; | |
540 | } | |
541 | ||
542 | static int __init prom_setprop(phandle node, const char *nodename, | |
543 | const char *pname, void *value, size_t valuelen) | |
544 | { | |
545 | char cmd[256], *p; | |
546 | ||
547 | if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL)) | |
548 | return call_prom("setprop", 4, 1, node, ADDR(pname), | |
549 | (u32)(unsigned long) value, (u32) valuelen); | |
550 | ||
551 | /* gah... setprop doesn't work on longtrail, have to use interpret */ | |
552 | p = cmd; | |
553 | add_string(&p, "dev"); | |
554 | add_string(&p, nodename); | |
555 | add_string(&p, tohex((u32)(unsigned long) value)); | |
556 | add_string(&p, tohex(valuelen)); | |
557 | add_string(&p, tohex(ADDR(pname))); | |
5827d416 | 558 | add_string(&p, tohex(strlen(pname))); |
a23414be PM |
559 | add_string(&p, "property"); |
560 | *p = 0; | |
561 | return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd); | |
9b6b563c PM |
562 | } |
563 | ||
5827d416 | 564 | /* We can't use the standard versions because of relocation headaches. */ |
cf68787b BK |
565 | #define isxdigit(c) (('0' <= (c) && (c) <= '9') \ |
566 | || ('a' <= (c) && (c) <= 'f') \ | |
567 | || ('A' <= (c) && (c) <= 'F')) | |
568 | ||
569 | #define isdigit(c) ('0' <= (c) && (c) <= '9') | |
570 | #define islower(c) ('a' <= (c) && (c) <= 'z') | |
571 | #define toupper(c) (islower(c) ? ((c) - 'a' + 'A') : (c)) | |
572 | ||
493adffc | 573 | static unsigned long prom_strtoul(const char *cp, const char **endp) |
cf68787b BK |
574 | { |
575 | unsigned long result = 0, base = 10, value; | |
576 | ||
577 | if (*cp == '0') { | |
578 | base = 8; | |
579 | cp++; | |
580 | if (toupper(*cp) == 'X') { | |
581 | cp++; | |
582 | base = 16; | |
583 | } | |
584 | } | |
585 | ||
586 | while (isxdigit(*cp) && | |
587 | (value = isdigit(*cp) ? *cp - '0' : toupper(*cp) - 'A' + 10) < base) { | |
588 | result = result * base + value; | |
589 | cp++; | |
590 | } | |
591 | ||
592 | if (endp) | |
593 | *endp = cp; | |
594 | ||
595 | return result; | |
596 | } | |
597 | ||
493adffc | 598 | static unsigned long prom_memparse(const char *ptr, const char **retptr) |
cf68787b BK |
599 | { |
600 | unsigned long ret = prom_strtoul(ptr, retptr); | |
601 | int shift = 0; | |
602 | ||
603 | /* | |
604 | * We can't use a switch here because GCC *may* generate a | |
605 | * jump table which won't work, because we're not running at | |
606 | * the address we're linked at. | |
607 | */ | |
608 | if ('G' == **retptr || 'g' == **retptr) | |
609 | shift = 30; | |
610 | ||
611 | if ('M' == **retptr || 'm' == **retptr) | |
612 | shift = 20; | |
613 | ||
614 | if ('K' == **retptr || 'k' == **retptr) | |
615 | shift = 10; | |
616 | ||
617 | if (shift) { | |
618 | ret <<= shift; | |
619 | (*retptr)++; | |
620 | } | |
621 | ||
622 | return ret; | |
623 | } | |
624 | ||
9b6b563c PM |
625 | /* |
626 | * Early parsing of the command line passed to the kernel, used for | |
627 | * "mem=x" and the options that affect the iommu | |
628 | */ | |
629 | static void __init early_cmdline_parse(void) | |
630 | { | |
cc5d0189 | 631 | const char *opt; |
cf68787b | 632 | |
cc5d0189 | 633 | char *p; |
eab00a20 | 634 | int l __maybe_unused = 0; |
9b6b563c | 635 | |
5827d416 AB |
636 | prom_cmd_line[0] = 0; |
637 | p = prom_cmd_line; | |
638 | if ((long)prom.chosen > 0) | |
639 | l = prom_getprop(prom.chosen, "bootargs", p, COMMAND_LINE_SIZE-1); | |
9b6b563c | 640 | #ifdef CONFIG_CMDLINE |
0e4aa9c2 | 641 | if (l <= 0 || p[0] == '\0') /* dbl check */ |
5827d416 AB |
642 | strlcpy(prom_cmd_line, |
643 | CONFIG_CMDLINE, sizeof(prom_cmd_line)); | |
9b6b563c | 644 | #endif /* CONFIG_CMDLINE */ |
5827d416 | 645 | prom_printf("command line: %s\n", prom_cmd_line); |
9b6b563c PM |
646 | |
647 | #ifdef CONFIG_PPC64 | |
5827d416 | 648 | opt = strstr(prom_cmd_line, "iommu="); |
9b6b563c PM |
649 | if (opt) { |
650 | prom_printf("iommu opt is: %s\n", opt); | |
651 | opt += 6; | |
652 | while (*opt && *opt == ' ') | |
653 | opt++; | |
5827d416 AB |
654 | if (!strncmp(opt, "off", 3)) |
655 | prom_iommu_off = 1; | |
656 | else if (!strncmp(opt, "force", 5)) | |
657 | prom_iommu_force_on = 1; | |
9b6b563c PM |
658 | } |
659 | #endif | |
5827d416 | 660 | opt = strstr(prom_cmd_line, "mem="); |
cf68787b BK |
661 | if (opt) { |
662 | opt += 4; | |
5827d416 | 663 | prom_memory_limit = prom_memparse(opt, (const char **)&opt); |
cf68787b BK |
664 | #ifdef CONFIG_PPC64 |
665 | /* Align to 16 MB == size of ppc64 large page */ | |
5827d416 | 666 | prom_memory_limit = ALIGN(prom_memory_limit, 0x1000000); |
cf68787b BK |
667 | #endif |
668 | } | |
014d02cb | 669 | |
c886087c BH |
670 | #ifdef CONFIG_PPC_PSERIES |
671 | prom_radix_disable = !IS_ENABLED(CONFIG_PPC_RADIX_MMU_DEFAULT); | |
014d02cb SJS |
672 | opt = strstr(prom_cmd_line, "disable_radix"); |
673 | if (opt) { | |
7a22d632 AK |
674 | opt += 13; |
675 | if (*opt && *opt == '=') { | |
676 | bool val; | |
677 | ||
678 | if (kstrtobool(++opt, &val)) | |
679 | prom_radix_disable = false; | |
680 | else | |
681 | prom_radix_disable = val; | |
682 | } else | |
683 | prom_radix_disable = true; | |
014d02cb | 684 | } |
7a22d632 AK |
685 | if (prom_radix_disable) |
686 | prom_debug("Radix disabled from cmdline\n"); | |
c886087c | 687 | #endif /* CONFIG_PPC_PSERIES */ |
9b6b563c PM |
688 | } |
689 | ||
11fdb309 | 690 | #ifdef CONFIG_PPC_PSERIES |
9b6b563c | 691 | /* |
530b5e14 NF |
692 | * The architecture vector has an array of PVR mask/value pairs, |
693 | * followed by # option vectors - 1, followed by the option vectors. | |
694 | * | |
695 | * See prom.h for the definition of the bits specified in the | |
696 | * architecture vector. | |
f709bfac | 697 | */ |
f709bfac | 698 | |
e8a4fd0a ME |
699 | /* Firmware expects the value to be n - 1, where n is the # of vectors */ |
700 | #define NUM_VECTORS(n) ((n) - 1) | |
701 | ||
702 | /* | |
703 | * Firmware expects 1 + n - 2, where n is the length of the option vector in | |
704 | * bytes. The 1 accounts for the length byte itself, the - 2 .. ? | |
705 | */ | |
706 | #define VECTOR_LENGTH(n) (1 + (n) - 2) | |
707 | ||
d03d1d65 ME |
708 | struct option_vector1 { |
709 | u8 byte1; | |
710 | u8 arch_versions; | |
cc3d2940 | 711 | u8 arch_versions3; |
d03d1d65 ME |
712 | } __packed; |
713 | ||
714 | struct option_vector2 { | |
715 | u8 byte1; | |
716 | __be16 reserved; | |
717 | __be32 real_base; | |
718 | __be32 real_size; | |
719 | __be32 virt_base; | |
720 | __be32 virt_size; | |
721 | __be32 load_base; | |
722 | __be32 min_rma; | |
723 | __be32 min_load; | |
724 | u8 min_rma_percent; | |
725 | u8 max_pft_size; | |
726 | } __packed; | |
727 | ||
728 | struct option_vector3 { | |
729 | u8 byte1; | |
730 | u8 byte2; | |
731 | } __packed; | |
732 | ||
733 | struct option_vector4 { | |
734 | u8 byte1; | |
735 | u8 min_vp_cap; | |
736 | } __packed; | |
737 | ||
738 | struct option_vector5 { | |
739 | u8 byte1; | |
740 | u8 byte2; | |
741 | u8 byte3; | |
742 | u8 cmo; | |
743 | u8 associativity; | |
744 | u8 bin_opts; | |
745 | u8 micro_checkpoint; | |
746 | u8 reserved0; | |
747 | __be32 max_cpus; | |
748 | __be16 papr_level; | |
749 | __be16 reserved1; | |
750 | u8 platform_facilities; | |
751 | u8 reserved2; | |
752 | __be16 reserved3; | |
753 | u8 subprocessors; | |
cc3d2940 PM |
754 | u8 byte22; |
755 | u8 intarch; | |
756 | u8 mmu; | |
014d02cb SJS |
757 | u8 hash_ext; |
758 | u8 radix_ext; | |
d03d1d65 ME |
759 | } __packed; |
760 | ||
761 | struct option_vector6 { | |
762 | u8 reserved; | |
763 | u8 secondary_pteg; | |
764 | u8 os_name; | |
765 | } __packed; | |
766 | ||
76ffb578 | 767 | struct ibm_arch_vec { |
cc3d2940 | 768 | struct { u32 mask, val; } pvrs[12]; |
76ffb578 ME |
769 | |
770 | u8 num_vectors; | |
771 | ||
772 | u8 vec1_len; | |
773 | struct option_vector1 vec1; | |
774 | ||
775 | u8 vec2_len; | |
776 | struct option_vector2 vec2; | |
777 | ||
778 | u8 vec3_len; | |
779 | struct option_vector3 vec3; | |
780 | ||
781 | u8 vec4_len; | |
782 | struct option_vector4 vec4; | |
783 | ||
784 | u8 vec5_len; | |
785 | struct option_vector5 vec5; | |
786 | ||
787 | u8 vec6_len; | |
788 | struct option_vector6 vec6; | |
789 | } __packed; | |
790 | ||
d00e34b9 | 791 | static const struct ibm_arch_vec ibm_architecture_vec_template __initconst = { |
76ffb578 ME |
792 | .pvrs = { |
793 | { | |
794 | .mask = cpu_to_be32(0xfffe0000), /* POWER5/POWER5+ */ | |
795 | .val = cpu_to_be32(0x003a0000), | |
796 | }, | |
797 | { | |
798 | .mask = cpu_to_be32(0xffff0000), /* POWER6 */ | |
799 | .val = cpu_to_be32(0x003e0000), | |
800 | }, | |
801 | { | |
802 | .mask = cpu_to_be32(0xffff0000), /* POWER7 */ | |
803 | .val = cpu_to_be32(0x003f0000), | |
804 | }, | |
805 | { | |
806 | .mask = cpu_to_be32(0xffff0000), /* POWER8E */ | |
807 | .val = cpu_to_be32(0x004b0000), | |
808 | }, | |
809 | { | |
810 | .mask = cpu_to_be32(0xffff0000), /* POWER8NVL */ | |
811 | .val = cpu_to_be32(0x004c0000), | |
812 | }, | |
813 | { | |
814 | .mask = cpu_to_be32(0xffff0000), /* POWER8 */ | |
815 | .val = cpu_to_be32(0x004d0000), | |
816 | }, | |
cc3d2940 PM |
817 | { |
818 | .mask = cpu_to_be32(0xffff0000), /* POWER9 */ | |
819 | .val = cpu_to_be32(0x004e0000), | |
820 | }, | |
821 | { | |
822 | .mask = cpu_to_be32(0xffffffff), /* all 3.00-compliant */ | |
823 | .val = cpu_to_be32(0x0f000005), | |
824 | }, | |
76ffb578 ME |
825 | { |
826 | .mask = cpu_to_be32(0xffffffff), /* all 2.07-compliant */ | |
827 | .val = cpu_to_be32(0x0f000004), | |
828 | }, | |
829 | { | |
830 | .mask = cpu_to_be32(0xffffffff), /* all 2.06-compliant */ | |
831 | .val = cpu_to_be32(0x0f000003), | |
832 | }, | |
833 | { | |
834 | .mask = cpu_to_be32(0xffffffff), /* all 2.05-compliant */ | |
835 | .val = cpu_to_be32(0x0f000002), | |
836 | }, | |
837 | { | |
838 | .mask = cpu_to_be32(0xfffffffe), /* all 2.04-compliant and earlier */ | |
839 | .val = cpu_to_be32(0x0f000001), | |
840 | }, | |
841 | }, | |
842 | ||
843 | .num_vectors = NUM_VECTORS(6), | |
844 | ||
845 | .vec1_len = VECTOR_LENGTH(sizeof(struct option_vector1)), | |
846 | .vec1 = { | |
847 | .byte1 = 0, | |
848 | .arch_versions = OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 | | |
849 | OV1_PPC_2_04 | OV1_PPC_2_05 | OV1_PPC_2_06 | OV1_PPC_2_07, | |
cc3d2940 | 850 | .arch_versions3 = OV1_PPC_3_00, |
76ffb578 ME |
851 | }, |
852 | ||
853 | .vec2_len = VECTOR_LENGTH(sizeof(struct option_vector2)), | |
854 | /* option vector 2: Open Firmware options supported */ | |
855 | .vec2 = { | |
856 | .byte1 = OV2_REAL_MODE, | |
857 | .reserved = 0, | |
858 | .real_base = cpu_to_be32(0xffffffff), | |
859 | .real_size = cpu_to_be32(0xffffffff), | |
860 | .virt_base = cpu_to_be32(0xffffffff), | |
861 | .virt_size = cpu_to_be32(0xffffffff), | |
862 | .load_base = cpu_to_be32(0xffffffff), | |
687da8fc | 863 | .min_rma = cpu_to_be32(512), /* 512MB min RMA */ |
76ffb578 ME |
864 | .min_load = cpu_to_be32(0xffffffff), /* full client load */ |
865 | .min_rma_percent = 0, /* min RMA percentage of total RAM */ | |
866 | .max_pft_size = 48, /* max log_2(hash table size) */ | |
867 | }, | |
868 | ||
869 | .vec3_len = VECTOR_LENGTH(sizeof(struct option_vector3)), | |
870 | /* option vector 3: processor options supported */ | |
871 | .vec3 = { | |
872 | .byte1 = 0, /* don't ignore, don't halt */ | |
873 | .byte2 = OV3_FP | OV3_VMX | OV3_DFP, | |
874 | }, | |
875 | ||
876 | .vec4_len = VECTOR_LENGTH(sizeof(struct option_vector4)), | |
877 | /* option vector 4: IBM PAPR implementation */ | |
878 | .vec4 = { | |
879 | .byte1 = 0, /* don't halt */ | |
880 | .min_vp_cap = OV4_MIN_ENT_CAP, /* minimum VP entitled capacity */ | |
881 | }, | |
882 | ||
883 | .vec5_len = VECTOR_LENGTH(sizeof(struct option_vector5)), | |
884 | /* option vector 5: PAPR/OF options */ | |
885 | .vec5 = { | |
886 | .byte1 = 0, /* don't ignore, don't halt */ | |
887 | .byte2 = OV5_FEAT(OV5_LPAR) | OV5_FEAT(OV5_SPLPAR) | OV5_FEAT(OV5_LARGE_PAGES) | | |
888 | OV5_FEAT(OV5_DRCONF_MEMORY) | OV5_FEAT(OV5_DONATE_DEDICATE_CPU) | | |
889 | #ifdef CONFIG_PCI_MSI | |
890 | /* PCIe/MSI support. Without MSI full PCIe is not supported */ | |
891 | OV5_FEAT(OV5_MSI), | |
892 | #else | |
893 | 0, | |
894 | #endif | |
895 | .byte3 = 0, | |
896 | .cmo = | |
897 | #ifdef CONFIG_PPC_SMLPAR | |
898 | OV5_FEAT(OV5_CMO) | OV5_FEAT(OV5_XCMO), | |
899 | #else | |
900 | 0, | |
901 | #endif | |
902 | .associativity = OV5_FEAT(OV5_TYPE1_AFFINITY) | OV5_FEAT(OV5_PRRN), | |
3dbbaf20 | 903 | .bin_opts = OV5_FEAT(OV5_RESIZE_HPT) | OV5_FEAT(OV5_HP_EVT), |
76ffb578 ME |
904 | .micro_checkpoint = 0, |
905 | .reserved0 = 0, | |
906 | .max_cpus = cpu_to_be32(NR_CPUS), /* number of cores supported */ | |
907 | .papr_level = 0, | |
908 | .reserved1 = 0, | |
909 | .platform_facilities = OV5_FEAT(OV5_PFO_HW_RNG) | OV5_FEAT(OV5_PFO_HW_ENCR) | OV5_FEAT(OV5_PFO_HW_842), | |
910 | .reserved2 = 0, | |
911 | .reserved3 = 0, | |
912 | .subprocessors = 1, | |
0c38ed6f | 913 | .byte22 = OV5_FEAT(OV5_DRMEM_V2), |
cc3d2940 | 914 | .intarch = 0, |
014d02cb SJS |
915 | .mmu = 0, |
916 | .hash_ext = 0, | |
917 | .radix_ext = 0, | |
76ffb578 ME |
918 | }, |
919 | ||
920 | /* option vector 6: IBM PAPR hints */ | |
921 | .vec6_len = VECTOR_LENGTH(sizeof(struct option_vector6)), | |
922 | .vec6 = { | |
923 | .reserved = 0, | |
924 | .secondary_pteg = 0, | |
925 | .os_name = OV6_LINUX, | |
926 | }, | |
927 | }; | |
928 | ||
a614f52e BH |
929 | static struct ibm_arch_vec __prombss ibm_architecture_vec ____cacheline_aligned; |
930 | ||
493adffc BH |
931 | /* Old method - ELF header with PT_NOTE sections only works on BE */ |
932 | #ifdef __BIG_ENDIAN__ | |
30c69ca0 | 933 | static const struct fake_elf { |
9b6b563c PM |
934 | Elf32_Ehdr elfhdr; |
935 | Elf32_Phdr phdr[2]; | |
936 | struct chrpnote { | |
937 | u32 namesz; | |
938 | u32 descsz; | |
939 | u32 type; | |
940 | char name[8]; /* "PowerPC" */ | |
941 | struct chrpdesc { | |
942 | u32 real_mode; | |
943 | u32 real_base; | |
944 | u32 real_size; | |
945 | u32 virt_base; | |
946 | u32 virt_size; | |
947 | u32 load_base; | |
948 | } chrpdesc; | |
949 | } chrpnote; | |
950 | struct rpanote { | |
951 | u32 namesz; | |
952 | u32 descsz; | |
953 | u32 type; | |
954 | char name[24]; /* "IBM,RPA-Client-Config" */ | |
955 | struct rpadesc { | |
956 | u32 lpar_affinity; | |
957 | u32 min_rmo_size; | |
958 | u32 min_rmo_percent; | |
959 | u32 max_pft_size; | |
960 | u32 splpar; | |
961 | u32 min_load; | |
962 | u32 new_mem_def; | |
963 | u32 ignore_me; | |
964 | } rpadesc; | |
965 | } rpanote; | |
d00e34b9 | 966 | } fake_elf __initconst = { |
9b6b563c PM |
967 | .elfhdr = { |
968 | .e_ident = { 0x7f, 'E', 'L', 'F', | |
969 | ELFCLASS32, ELFDATA2MSB, EV_CURRENT }, | |
970 | .e_type = ET_EXEC, /* yeah right */ | |
971 | .e_machine = EM_PPC, | |
972 | .e_version = EV_CURRENT, | |
973 | .e_phoff = offsetof(struct fake_elf, phdr), | |
974 | .e_phentsize = sizeof(Elf32_Phdr), | |
975 | .e_phnum = 2 | |
976 | }, | |
977 | .phdr = { | |
978 | [0] = { | |
979 | .p_type = PT_NOTE, | |
980 | .p_offset = offsetof(struct fake_elf, chrpnote), | |
981 | .p_filesz = sizeof(struct chrpnote) | |
982 | }, [1] = { | |
983 | .p_type = PT_NOTE, | |
984 | .p_offset = offsetof(struct fake_elf, rpanote), | |
985 | .p_filesz = sizeof(struct rpanote) | |
986 | } | |
987 | }, | |
988 | .chrpnote = { | |
989 | .namesz = sizeof("PowerPC"), | |
990 | .descsz = sizeof(struct chrpdesc), | |
991 | .type = 0x1275, | |
992 | .name = "PowerPC", | |
993 | .chrpdesc = { | |
994 | .real_mode = ~0U, /* ~0 means "don't care" */ | |
995 | .real_base = ~0U, | |
996 | .real_size = ~0U, | |
997 | .virt_base = ~0U, | |
998 | .virt_size = ~0U, | |
999 | .load_base = ~0U | |
1000 | }, | |
1001 | }, | |
1002 | .rpanote = { | |
1003 | .namesz = sizeof("IBM,RPA-Client-Config"), | |
1004 | .descsz = sizeof(struct rpadesc), | |
1005 | .type = 0x12759999, | |
1006 | .name = "IBM,RPA-Client-Config", | |
1007 | .rpadesc = { | |
5663a123 PM |
1008 | .lpar_affinity = 0, |
1009 | .min_rmo_size = 64, /* in megabytes */ | |
9b6b563c | 1010 | .min_rmo_percent = 0, |
5663a123 | 1011 | .max_pft_size = 48, /* 2^48 bytes max PFT size */ |
9b6b563c PM |
1012 | .splpar = 1, |
1013 | .min_load = ~0U, | |
5663a123 | 1014 | .new_mem_def = 0 |
9b6b563c PM |
1015 | } |
1016 | } | |
1017 | }; | |
493adffc | 1018 | #endif /* __BIG_ENDIAN__ */ |
9b6b563c | 1019 | |
efec959f BH |
1020 | static int __init prom_count_smt_threads(void) |
1021 | { | |
1022 | phandle node; | |
1023 | char type[64]; | |
1024 | unsigned int plen; | |
1025 | ||
1026 | /* Pick up th first CPU node we can find */ | |
1027 | for (node = 0; prom_next_node(&node); ) { | |
1028 | type[0] = 0; | |
1029 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1030 | ||
5827d416 | 1031 | if (strcmp(type, "cpu")) |
efec959f BH |
1032 | continue; |
1033 | /* | |
1034 | * There is an entry for each smt thread, each entry being | |
1035 | * 4 bytes long. All cpus should have the same number of | |
1036 | * smt threads, so return after finding the first. | |
1037 | */ | |
1038 | plen = prom_getproplen(node, "ibm,ppc-interrupt-server#s"); | |
1039 | if (plen == PROM_ERROR) | |
1040 | break; | |
1041 | plen >>= 2; | |
2c48a7d6 | 1042 | prom_debug("Found %lu smt threads per core\n", (unsigned long)plen); |
efec959f BH |
1043 | |
1044 | /* Sanity check */ | |
1045 | if (plen < 1 || plen > 64) { | |
2c48a7d6 | 1046 | prom_printf("Threads per core %lu out of bounds, assuming 1\n", |
efec959f BH |
1047 | (unsigned long)plen); |
1048 | return 1; | |
1049 | } | |
1050 | return plen; | |
1051 | } | |
1052 | prom_debug("No threads found, assuming 1 per core\n"); | |
1053 | ||
1054 | return 1; | |
1055 | ||
1056 | } | |
1057 | ||
014d02cb SJS |
1058 | static void __init prom_parse_mmu_model(u8 val, |
1059 | struct platform_support *support) | |
1060 | { | |
1061 | switch (val) { | |
1062 | case OV5_FEAT(OV5_MMU_DYNAMIC): | |
1063 | case OV5_FEAT(OV5_MMU_EITHER): /* Either Available */ | |
1064 | prom_debug("MMU - either supported\n"); | |
1065 | support->radix_mmu = !prom_radix_disable; | |
1066 | support->hash_mmu = true; | |
1067 | break; | |
1068 | case OV5_FEAT(OV5_MMU_RADIX): /* Only Radix */ | |
1069 | prom_debug("MMU - radix only\n"); | |
1070 | if (prom_radix_disable) { | |
1071 | /* | |
1072 | * If we __have__ to do radix, we're better off ignoring | |
1073 | * the command line rather than not booting. | |
1074 | */ | |
1075 | prom_printf("WARNING: Ignoring cmdline option disable_radix\n"); | |
1076 | } | |
1077 | support->radix_mmu = true; | |
1078 | break; | |
1079 | case OV5_FEAT(OV5_MMU_HASH): | |
1080 | prom_debug("MMU - hash only\n"); | |
1081 | support->hash_mmu = true; | |
1082 | break; | |
1083 | default: | |
1084 | prom_debug("Unknown mmu support option: 0x%x\n", val); | |
1085 | break; | |
1086 | } | |
1087 | } | |
1088 | ||
ac5e5a54 CLG |
1089 | static void __init prom_parse_xive_model(u8 val, |
1090 | struct platform_support *support) | |
1091 | { | |
1092 | switch (val) { | |
1093 | case OV5_FEAT(OV5_XIVE_EITHER): /* Either Available */ | |
1094 | prom_debug("XIVE - either mode supported\n"); | |
1095 | support->xive = true; | |
1096 | break; | |
1097 | case OV5_FEAT(OV5_XIVE_EXPLOIT): /* Only Exploitation mode */ | |
1098 | prom_debug("XIVE - exploitation mode supported\n"); | |
1099 | support->xive = true; | |
1100 | break; | |
1101 | case OV5_FEAT(OV5_XIVE_LEGACY): /* Only Legacy mode */ | |
1102 | prom_debug("XIVE - legacy mode supported\n"); | |
1103 | break; | |
1104 | default: | |
1105 | prom_debug("Unknown xive support option: 0x%x\n", val); | |
1106 | break; | |
1107 | } | |
1108 | } | |
1109 | ||
014d02cb SJS |
1110 | static void __init prom_parse_platform_support(u8 index, u8 val, |
1111 | struct platform_support *support) | |
1112 | { | |
1113 | switch (index) { | |
1114 | case OV5_INDX(OV5_MMU_SUPPORT): /* MMU Model */ | |
1115 | prom_parse_mmu_model(val & OV5_FEAT(OV5_MMU_SUPPORT), support); | |
1116 | break; | |
1117 | case OV5_INDX(OV5_RADIX_GTSE): /* Radix Extensions */ | |
1118 | if (val & OV5_FEAT(OV5_RADIX_GTSE)) { | |
1119 | prom_debug("Radix - GTSE supported\n"); | |
1120 | support->radix_gtse = true; | |
1121 | } | |
1122 | break; | |
ac5e5a54 CLG |
1123 | case OV5_INDX(OV5_XIVE_SUPPORT): /* Interrupt mode */ |
1124 | prom_parse_xive_model(val & OV5_FEAT(OV5_XIVE_SUPPORT), | |
1125 | support); | |
1126 | break; | |
014d02cb SJS |
1127 | } |
1128 | } | |
1129 | ||
1130 | static void __init prom_check_platform_support(void) | |
1131 | { | |
1132 | struct platform_support supported = { | |
1133 | .hash_mmu = false, | |
1134 | .radix_mmu = false, | |
ac5e5a54 CLG |
1135 | .radix_gtse = false, |
1136 | .xive = false | |
014d02cb SJS |
1137 | }; |
1138 | int prop_len = prom_getproplen(prom.chosen, | |
1139 | "ibm,arch-vec-5-platform-support"); | |
a614f52e BH |
1140 | |
1141 | /* First copy the architecture vec template */ | |
1142 | ibm_architecture_vec = ibm_architecture_vec_template; | |
1143 | ||
014d02cb SJS |
1144 | if (prop_len > 1) { |
1145 | int i; | |
ab912399 | 1146 | u8 vec[8]; |
014d02cb SJS |
1147 | prom_debug("Found ibm,arch-vec-5-platform-support, len: %d\n", |
1148 | prop_len); | |
ab912399 SJS |
1149 | if (prop_len > sizeof(vec)) |
1150 | prom_printf("WARNING: ibm,arch-vec-5-platform-support longer than expected (len: %d)\n", | |
1151 | prop_len); | |
014d02cb SJS |
1152 | prom_getprop(prom.chosen, "ibm,arch-vec-5-platform-support", |
1153 | &vec, sizeof(vec)); | |
ab912399 | 1154 | for (i = 0; i < sizeof(vec); i += 2) { |
014d02cb SJS |
1155 | prom_debug("%d: index = 0x%x val = 0x%x\n", i / 2 |
1156 | , vec[i] | |
1157 | , vec[i + 1]); | |
1158 | prom_parse_platform_support(vec[i], vec[i + 1], | |
1159 | &supported); | |
1160 | } | |
1161 | } | |
1162 | ||
79b46868 AK |
1163 | if (supported.radix_mmu && supported.radix_gtse && |
1164 | IS_ENABLED(CONFIG_PPC_RADIX_MMU)) { | |
014d02cb SJS |
1165 | /* Radix preferred - but we require GTSE for now */ |
1166 | prom_debug("Asking for radix with GTSE\n"); | |
1167 | ibm_architecture_vec.vec5.mmu = OV5_FEAT(OV5_MMU_RADIX); | |
1168 | ibm_architecture_vec.vec5.radix_ext = OV5_FEAT(OV5_RADIX_GTSE); | |
1169 | } else if (supported.hash_mmu) { | |
1170 | /* Default to hash mmu (if we can) */ | |
1171 | prom_debug("Asking for hash\n"); | |
1172 | ibm_architecture_vec.vec5.mmu = OV5_FEAT(OV5_MMU_HASH); | |
1173 | } else { | |
1174 | /* We're probably on a legacy hypervisor */ | |
1175 | prom_debug("Assuming legacy hash support\n"); | |
1176 | } | |
ac5e5a54 CLG |
1177 | |
1178 | if (supported.xive) { | |
1179 | prom_debug("Asking for XIVE\n"); | |
1180 | ibm_architecture_vec.vec5.intarch = OV5_FEAT(OV5_XIVE_EXPLOIT); | |
1181 | } | |
014d02cb | 1182 | } |
efec959f | 1183 | |
9b6b563c PM |
1184 | static void __init prom_send_capabilities(void) |
1185 | { | |
493adffc | 1186 | ihandle root; |
f709bfac | 1187 | prom_arg_t ret; |
dbd0c5d5 | 1188 | u32 cores; |
f709bfac | 1189 | |
014d02cb SJS |
1190 | /* Check ibm,arch-vec-5-platform-support and fixup vec5 if required */ |
1191 | prom_check_platform_support(); | |
1192 | ||
f709bfac PM |
1193 | root = call_prom("open", 1, 1, ADDR("/")); |
1194 | if (root != 0) { | |
efec959f BH |
1195 | /* We need to tell the FW about the number of cores we support. |
1196 | * | |
1197 | * To do that, we count the number of threads on the first core | |
1198 | * (we assume this is the same for all cores) and use it to | |
1199 | * divide NR_CPUS. | |
1200 | */ | |
dbd0c5d5 | 1201 | |
76ffb578 | 1202 | cores = DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads()); |
eae5f709 | 1203 | prom_printf("Max number of cores passed to firmware: %u (NR_CPUS = %d)\n", |
76ffb578 ME |
1204 | cores, NR_CPUS); |
1205 | ||
1206 | ibm_architecture_vec.vec5.max_cpus = cpu_to_be32(cores); | |
efec959f | 1207 | |
f709bfac | 1208 | /* try calling the ibm,client-architecture-support method */ |
049d0497 | 1209 | prom_printf("Calling ibm,client-architecture-support..."); |
f709bfac PM |
1210 | if (call_prom_ret("call-method", 3, 2, &ret, |
1211 | ADDR("ibm,client-architecture-support"), | |
33b74977 | 1212 | root, |
76ffb578 | 1213 | ADDR(&ibm_architecture_vec)) == 0) { |
f709bfac PM |
1214 | /* the call exists... */ |
1215 | if (ret) | |
4da727ae | 1216 | prom_printf("\nWARNING: ibm,client-architecture" |
f709bfac PM |
1217 | "-support call FAILED!\n"); |
1218 | call_prom("close", 1, 0, root); | |
4da727ae | 1219 | prom_printf(" done\n"); |
f709bfac PM |
1220 | return; |
1221 | } | |
1222 | call_prom("close", 1, 0, root); | |
049d0497 | 1223 | prom_printf(" not implemented\n"); |
f709bfac | 1224 | } |
9b6b563c | 1225 | |
493adffc BH |
1226 | #ifdef __BIG_ENDIAN__ |
1227 | { | |
1228 | ihandle elfloader; | |
1229 | ||
1230 | /* no ibm,client-architecture-support call, try the old way */ | |
1231 | elfloader = call_prom("open", 1, 1, | |
1232 | ADDR("/packages/elf-loader")); | |
1233 | if (elfloader == 0) { | |
1234 | prom_printf("couldn't open /packages/elf-loader\n"); | |
1235 | return; | |
1236 | } | |
1237 | call_prom("call-method", 3, 1, ADDR("process-elf-header"), | |
1238 | elfloader, ADDR(&fake_elf)); | |
1239 | call_prom("close", 1, 0, elfloader); | |
9b6b563c | 1240 | } |
493adffc | 1241 | #endif /* __BIG_ENDIAN__ */ |
9b6b563c | 1242 | } |
11fdb309 | 1243 | #endif /* CONFIG_PPC_PSERIES */ |
9b6b563c PM |
1244 | |
1245 | /* | |
1246 | * Memory allocation strategy... our layout is normally: | |
1247 | * | |
1248 | * at 14Mb or more we have vmlinux, then a gap and initrd. In some | |
1249 | * rare cases, initrd might end up being before the kernel though. | |
1250 | * We assume this won't override the final kernel at 0, we have no | |
1251 | * provision to handle that in this version, but it should hopefully | |
1252 | * never happen. | |
1253 | * | |
1254 | * alloc_top is set to the top of RMO, eventually shrink down if the | |
1255 | * TCEs overlap | |
1256 | * | |
1257 | * alloc_bottom is set to the top of kernel/initrd | |
1258 | * | |
1259 | * from there, allocations are done this way : rtas is allocated | |
1260 | * topmost, and the device-tree is allocated from the bottom. We try | |
1261 | * to grow the device-tree allocation as we progress. If we can't, | |
1262 | * then we fail, we don't currently have a facility to restart | |
1263 | * elsewhere, but that shouldn't be necessary. | |
1264 | * | |
1265 | * Note that calls to reserve_mem have to be done explicitly, memory | |
1266 | * allocated with either alloc_up or alloc_down isn't automatically | |
1267 | * reserved. | |
1268 | */ | |
1269 | ||
1270 | ||
1271 | /* | |
1272 | * Allocates memory in the RMO upward from the kernel/initrd | |
1273 | * | |
1274 | * When align is 0, this is a special case, it means to allocate in place | |
1275 | * at the current location of alloc_bottom or fail (that is basically | |
1276 | * extending the previous allocation). Used for the device-tree flattening | |
1277 | */ | |
1278 | static unsigned long __init alloc_up(unsigned long size, unsigned long align) | |
1279 | { | |
5827d416 | 1280 | unsigned long base = alloc_bottom; |
9b6b563c PM |
1281 | unsigned long addr = 0; |
1282 | ||
c4988820 PM |
1283 | if (align) |
1284 | base = _ALIGN_UP(base, align); | |
eae5f709 | 1285 | prom_debug("%s(%lx, %lx)\n", __func__, size, align); |
5827d416 | 1286 | if (ram_top == 0) |
9b6b563c PM |
1287 | prom_panic("alloc_up() called with mem not initialized\n"); |
1288 | ||
1289 | if (align) | |
5827d416 | 1290 | base = _ALIGN_UP(alloc_bottom, align); |
9b6b563c | 1291 | else |
5827d416 | 1292 | base = alloc_bottom; |
9b6b563c | 1293 | |
5827d416 | 1294 | for(; (base + size) <= alloc_top; |
9b6b563c | 1295 | base = _ALIGN_UP(base + 0x100000, align)) { |
eae5f709 | 1296 | prom_debug(" trying: 0x%lx\n\r", base); |
9b6b563c | 1297 | addr = (unsigned long)prom_claim(base, size, 0); |
c4988820 | 1298 | if (addr != PROM_ERROR && addr != 0) |
9b6b563c PM |
1299 | break; |
1300 | addr = 0; | |
1301 | if (align == 0) | |
1302 | break; | |
1303 | } | |
1304 | if (addr == 0) | |
1305 | return 0; | |
5827d416 | 1306 | alloc_bottom = addr + size; |
9b6b563c | 1307 | |
eae5f709 MM |
1308 | prom_debug(" -> %lx\n", addr); |
1309 | prom_debug(" alloc_bottom : %lx\n", alloc_bottom); | |
1310 | prom_debug(" alloc_top : %lx\n", alloc_top); | |
1311 | prom_debug(" alloc_top_hi : %lx\n", alloc_top_high); | |
1312 | prom_debug(" rmo_top : %lx\n", rmo_top); | |
1313 | prom_debug(" ram_top : %lx\n", ram_top); | |
9b6b563c PM |
1314 | |
1315 | return addr; | |
1316 | } | |
1317 | ||
1318 | /* | |
1319 | * Allocates memory downward, either from top of RMO, or if highmem | |
1320 | * is set, from the top of RAM. Note that this one doesn't handle | |
1321 | * failures. It does claim memory if highmem is not set. | |
1322 | */ | |
1323 | static unsigned long __init alloc_down(unsigned long size, unsigned long align, | |
1324 | int highmem) | |
1325 | { | |
1326 | unsigned long base, addr = 0; | |
1327 | ||
eae5f709 | 1328 | prom_debug("%s(%lx, %lx, %s)\n", __func__, size, align, |
5827d416 AB |
1329 | highmem ? "(high)" : "(low)"); |
1330 | if (ram_top == 0) | |
9b6b563c PM |
1331 | prom_panic("alloc_down() called with mem not initialized\n"); |
1332 | ||
1333 | if (highmem) { | |
1334 | /* Carve out storage for the TCE table. */ | |
5827d416 AB |
1335 | addr = _ALIGN_DOWN(alloc_top_high - size, align); |
1336 | if (addr <= alloc_bottom) | |
9b6b563c PM |
1337 | return 0; |
1338 | /* Will we bump into the RMO ? If yes, check out that we | |
1339 | * didn't overlap existing allocations there, if we did, | |
1340 | * we are dead, we must be the first in town ! | |
1341 | */ | |
5827d416 | 1342 | if (addr < rmo_top) { |
9b6b563c | 1343 | /* Good, we are first */ |
5827d416 AB |
1344 | if (alloc_top == rmo_top) |
1345 | alloc_top = rmo_top = addr; | |
9b6b563c PM |
1346 | else |
1347 | return 0; | |
1348 | } | |
5827d416 | 1349 | alloc_top_high = addr; |
9b6b563c PM |
1350 | goto bail; |
1351 | } | |
1352 | ||
5827d416 AB |
1353 | base = _ALIGN_DOWN(alloc_top - size, align); |
1354 | for (; base > alloc_bottom; | |
9b6b563c | 1355 | base = _ALIGN_DOWN(base - 0x100000, align)) { |
eae5f709 | 1356 | prom_debug(" trying: 0x%lx\n\r", base); |
9b6b563c | 1357 | addr = (unsigned long)prom_claim(base, size, 0); |
c4988820 | 1358 | if (addr != PROM_ERROR && addr != 0) |
9b6b563c PM |
1359 | break; |
1360 | addr = 0; | |
1361 | } | |
1362 | if (addr == 0) | |
1363 | return 0; | |
5827d416 | 1364 | alloc_top = addr; |
9b6b563c PM |
1365 | |
1366 | bail: | |
eae5f709 MM |
1367 | prom_debug(" -> %lx\n", addr); |
1368 | prom_debug(" alloc_bottom : %lx\n", alloc_bottom); | |
1369 | prom_debug(" alloc_top : %lx\n", alloc_top); | |
1370 | prom_debug(" alloc_top_hi : %lx\n", alloc_top_high); | |
1371 | prom_debug(" rmo_top : %lx\n", rmo_top); | |
1372 | prom_debug(" ram_top : %lx\n", ram_top); | |
9b6b563c PM |
1373 | |
1374 | return addr; | |
1375 | } | |
1376 | ||
1377 | /* | |
1378 | * Parse a "reg" cell | |
1379 | */ | |
1380 | static unsigned long __init prom_next_cell(int s, cell_t **cellp) | |
1381 | { | |
1382 | cell_t *p = *cellp; | |
1383 | unsigned long r = 0; | |
1384 | ||
1385 | /* Ignore more than 2 cells */ | |
1386 | while (s > sizeof(unsigned long) / 4) { | |
1387 | p++; | |
1388 | s--; | |
1389 | } | |
493adffc | 1390 | r = be32_to_cpu(*p++); |
9b6b563c | 1391 | #ifdef CONFIG_PPC64 |
35499c01 | 1392 | if (s > 1) { |
9b6b563c | 1393 | r <<= 32; |
493adffc | 1394 | r |= be32_to_cpu(*(p++)); |
9b6b563c PM |
1395 | } |
1396 | #endif | |
1397 | *cellp = p; | |
1398 | return r; | |
1399 | } | |
1400 | ||
1401 | /* | |
1402 | * Very dumb function for adding to the memory reserve list, but | |
1403 | * we don't need anything smarter at this point | |
1404 | * | |
1405 | * XXX Eventually check for collisions. They should NEVER happen. | |
1406 | * If problems seem to show up, it would be a good start to track | |
1407 | * them down. | |
1408 | */ | |
0108d3fe | 1409 | static void __init reserve_mem(u64 base, u64 size) |
9b6b563c | 1410 | { |
cbbcf340 | 1411 | u64 top = base + size; |
5827d416 | 1412 | unsigned long cnt = mem_reserve_cnt; |
9b6b563c PM |
1413 | |
1414 | if (size == 0) | |
1415 | return; | |
1416 | ||
1417 | /* We need to always keep one empty entry so that we | |
1418 | * have our terminator with "size" set to 0 since we are | |
1419 | * dumb and just copy this entire array to the boot params | |
1420 | */ | |
1421 | base = _ALIGN_DOWN(base, PAGE_SIZE); | |
1422 | top = _ALIGN_UP(top, PAGE_SIZE); | |
1423 | size = top - base; | |
1424 | ||
1425 | if (cnt >= (MEM_RESERVE_MAP_SIZE - 1)) | |
1426 | prom_panic("Memory reserve map exhausted !\n"); | |
493adffc BH |
1427 | mem_reserve_map[cnt].base = cpu_to_be64(base); |
1428 | mem_reserve_map[cnt].size = cpu_to_be64(size); | |
5827d416 | 1429 | mem_reserve_cnt = cnt + 1; |
9b6b563c PM |
1430 | } |
1431 | ||
1432 | /* | |
b3c2ffd5 | 1433 | * Initialize memory allocation mechanism, parse "memory" nodes and |
9b6b563c PM |
1434 | * obtain that way the top of memory and RMO to setup out local allocator |
1435 | */ | |
1436 | static void __init prom_init_mem(void) | |
1437 | { | |
1438 | phandle node; | |
eab00a20 MM |
1439 | #ifdef DEBUG_PROM |
1440 | char *path; | |
1441 | #endif | |
1442 | char type[64]; | |
9b6b563c PM |
1443 | unsigned int plen; |
1444 | cell_t *p, *endp; | |
493adffc | 1445 | __be32 val; |
9b6b563c PM |
1446 | u32 rac, rsc; |
1447 | ||
1448 | /* | |
1449 | * We iterate the memory nodes to find | |
1450 | * 1) top of RMO (first node) | |
1451 | * 2) top of memory | |
1452 | */ | |
493adffc BH |
1453 | val = cpu_to_be32(2); |
1454 | prom_getprop(prom.root, "#address-cells", &val, sizeof(val)); | |
1455 | rac = be32_to_cpu(val); | |
1456 | val = cpu_to_be32(1); | |
1457 | prom_getprop(prom.root, "#size-cells", &val, sizeof(rsc)); | |
1458 | rsc = be32_to_cpu(val); | |
1459 | prom_debug("root_addr_cells: %x\n", rac); | |
1460 | prom_debug("root_size_cells: %x\n", rsc); | |
9b6b563c PM |
1461 | |
1462 | prom_debug("scanning memory:\n"); | |
eab00a20 | 1463 | #ifdef DEBUG_PROM |
5827d416 | 1464 | path = prom_scratch; |
eab00a20 | 1465 | #endif |
9b6b563c PM |
1466 | |
1467 | for (node = 0; prom_next_node(&node); ) { | |
1468 | type[0] = 0; | |
1469 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1470 | ||
c4988820 PM |
1471 | if (type[0] == 0) { |
1472 | /* | |
1473 | * CHRP Longtrail machines have no device_type | |
1474 | * on the memory node, so check the name instead... | |
1475 | */ | |
1476 | prom_getprop(node, "name", type, sizeof(type)); | |
1477 | } | |
5827d416 | 1478 | if (strcmp(type, "memory")) |
9b6b563c | 1479 | continue; |
c4988820 | 1480 | |
5827d416 | 1481 | plen = prom_getprop(node, "reg", regbuf, sizeof(regbuf)); |
9b6b563c PM |
1482 | if (plen > sizeof(regbuf)) { |
1483 | prom_printf("memory node too large for buffer !\n"); | |
1484 | plen = sizeof(regbuf); | |
1485 | } | |
5827d416 | 1486 | p = regbuf; |
9b6b563c PM |
1487 | endp = p + (plen / sizeof(cell_t)); |
1488 | ||
1489 | #ifdef DEBUG_PROM | |
1490 | memset(path, 0, PROM_SCRATCH_SIZE); | |
1491 | call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); | |
1492 | prom_debug(" node %s :\n", path); | |
1493 | #endif /* DEBUG_PROM */ | |
1494 | ||
1495 | while ((endp - p) >= (rac + rsc)) { | |
1496 | unsigned long base, size; | |
1497 | ||
1498 | base = prom_next_cell(rac, &p); | |
1499 | size = prom_next_cell(rsc, &p); | |
1500 | ||
1501 | if (size == 0) | |
1502 | continue; | |
eae5f709 | 1503 | prom_debug(" %lx %lx\n", base, size); |
5827d416 AB |
1504 | if (base == 0 && (of_platform & PLATFORM_LPAR)) |
1505 | rmo_top = size; | |
1506 | if ((base + size) > ram_top) | |
1507 | ram_top = base + size; | |
9b6b563c PM |
1508 | } |
1509 | } | |
1510 | ||
5827d416 | 1511 | alloc_bottom = PAGE_ALIGN((unsigned long)&_end + 0x4000); |
9b6b563c | 1512 | |
cf68787b BK |
1513 | /* |
1514 | * If prom_memory_limit is set we reduce the upper limits *except* for | |
1515 | * alloc_top_high. This must be the real top of RAM so we can put | |
1516 | * TCE's up there. | |
1517 | */ | |
1518 | ||
5827d416 | 1519 | alloc_top_high = ram_top; |
cf68787b | 1520 | |
5827d416 AB |
1521 | if (prom_memory_limit) { |
1522 | if (prom_memory_limit <= alloc_bottom) { | |
eae5f709 MM |
1523 | prom_printf("Ignoring mem=%lx <= alloc_bottom.\n", |
1524 | prom_memory_limit); | |
5827d416 AB |
1525 | prom_memory_limit = 0; |
1526 | } else if (prom_memory_limit >= ram_top) { | |
eae5f709 MM |
1527 | prom_printf("Ignoring mem=%lx >= ram_top.\n", |
1528 | prom_memory_limit); | |
5827d416 | 1529 | prom_memory_limit = 0; |
cf68787b | 1530 | } else { |
5827d416 AB |
1531 | ram_top = prom_memory_limit; |
1532 | rmo_top = min(rmo_top, prom_memory_limit); | |
cf68787b BK |
1533 | } |
1534 | } | |
1535 | ||
9b6b563c PM |
1536 | /* |
1537 | * Setup our top alloc point, that is top of RMO or top of | |
1538 | * segment 0 when running non-LPAR. | |
1539 | * Some RS64 machines have buggy firmware where claims up at | |
1540 | * 1GB fail. Cap at 768MB as a workaround. | |
1541 | * Since 768MB is plenty of room, and we need to cap to something | |
1542 | * reasonable on 32-bit, cap at 768MB on all machines. | |
1543 | */ | |
5827d416 AB |
1544 | if (!rmo_top) |
1545 | rmo_top = ram_top; | |
1546 | rmo_top = min(0x30000000ul, rmo_top); | |
1547 | alloc_top = rmo_top; | |
1548 | alloc_top_high = ram_top; | |
9b6b563c | 1549 | |
64968f60 PM |
1550 | /* |
1551 | * Check if we have an initrd after the kernel but still inside | |
1552 | * the RMO. If we do move our bottom point to after it. | |
1553 | */ | |
5827d416 AB |
1554 | if (prom_initrd_start && |
1555 | prom_initrd_start < rmo_top && | |
1556 | prom_initrd_end > alloc_bottom) | |
1557 | alloc_bottom = PAGE_ALIGN(prom_initrd_end); | |
64968f60 | 1558 | |
9b6b563c | 1559 | prom_printf("memory layout at init:\n"); |
eae5f709 MM |
1560 | prom_printf(" memory_limit : %lx (16 MB aligned)\n", |
1561 | prom_memory_limit); | |
1562 | prom_printf(" alloc_bottom : %lx\n", alloc_bottom); | |
1563 | prom_printf(" alloc_top : %lx\n", alloc_top); | |
1564 | prom_printf(" alloc_top_hi : %lx\n", alloc_top_high); | |
1565 | prom_printf(" rmo_top : %lx\n", rmo_top); | |
1566 | prom_printf(" ram_top : %lx\n", ram_top); | |
9b6b563c PM |
1567 | } |
1568 | ||
27f44888 BH |
1569 | static void __init prom_close_stdin(void) |
1570 | { | |
493adffc BH |
1571 | __be32 val; |
1572 | ihandle stdin; | |
27f44888 | 1573 | |
493adffc BH |
1574 | if (prom_getprop(prom.chosen, "stdin", &val, sizeof(val)) > 0) { |
1575 | stdin = be32_to_cpu(val); | |
1576 | call_prom("close", 1, 0, stdin); | |
1577 | } | |
27f44888 BH |
1578 | } |
1579 | ||
9b6b563c PM |
1580 | /* |
1581 | * Allocate room for and instantiate RTAS | |
1582 | */ | |
1583 | static void __init prom_instantiate_rtas(void) | |
1584 | { | |
1585 | phandle rtas_node; | |
1586 | ihandle rtas_inst; | |
1587 | u32 base, entry = 0; | |
493adffc | 1588 | __be32 val; |
9b6b563c PM |
1589 | u32 size = 0; |
1590 | ||
1591 | prom_debug("prom_instantiate_rtas: start...\n"); | |
1592 | ||
1593 | rtas_node = call_prom("finddevice", 1, 1, ADDR("/rtas")); | |
1594 | prom_debug("rtas_node: %x\n", rtas_node); | |
1595 | if (!PHANDLE_VALID(rtas_node)) | |
1596 | return; | |
1597 | ||
493adffc BH |
1598 | val = 0; |
1599 | prom_getprop(rtas_node, "rtas-size", &val, sizeof(size)); | |
1600 | size = be32_to_cpu(val); | |
9b6b563c PM |
1601 | if (size == 0) |
1602 | return; | |
1603 | ||
1604 | base = alloc_down(size, PAGE_SIZE, 0); | |
6d1e2c6c AB |
1605 | if (base == 0) |
1606 | prom_panic("Could not allocate memory for RTAS\n"); | |
9b6b563c PM |
1607 | |
1608 | rtas_inst = call_prom("open", 1, 1, ADDR("/rtas")); | |
1609 | if (!IHANDLE_VALID(rtas_inst)) { | |
a23414be | 1610 | prom_printf("opening rtas package failed (%x)\n", rtas_inst); |
9b6b563c PM |
1611 | return; |
1612 | } | |
1613 | ||
1f8737aa | 1614 | prom_printf("instantiating rtas at 0x%x...", base); |
9b6b563c PM |
1615 | |
1616 | if (call_prom_ret("call-method", 3, 2, &entry, | |
1617 | ADDR("instantiate-rtas"), | |
a23414be | 1618 | rtas_inst, base) != 0 |
9b6b563c PM |
1619 | || entry == 0) { |
1620 | prom_printf(" failed\n"); | |
1621 | return; | |
1622 | } | |
1623 | prom_printf(" done\n"); | |
1624 | ||
1625 | reserve_mem(base, size); | |
1626 | ||
493adffc | 1627 | val = cpu_to_be32(base); |
a23414be | 1628 | prom_setprop(rtas_node, "/rtas", "linux,rtas-base", |
493adffc BH |
1629 | &val, sizeof(val)); |
1630 | val = cpu_to_be32(entry); | |
a23414be | 1631 | prom_setprop(rtas_node, "/rtas", "linux,rtas-entry", |
493adffc | 1632 | &val, sizeof(val)); |
9b6b563c | 1633 | |
dbe78b40 BH |
1634 | /* Check if it supports "query-cpu-stopped-state" */ |
1635 | if (prom_getprop(rtas_node, "query-cpu-stopped-state", | |
1636 | &val, sizeof(val)) != PROM_ERROR) | |
1637 | rtas_has_query_cpu_stopped = true; | |
1638 | ||
9b6b563c PM |
1639 | prom_debug("rtas base = 0x%x\n", base); |
1640 | prom_debug("rtas entry = 0x%x\n", entry); | |
eae5f709 | 1641 | prom_debug("rtas size = 0x%x\n", size); |
9b6b563c PM |
1642 | |
1643 | prom_debug("prom_instantiate_rtas: end...\n"); | |
1644 | } | |
1645 | ||
1646 | #ifdef CONFIG_PPC64 | |
4a727429 AL |
1647 | /* |
1648 | * Allocate room for and instantiate Stored Measurement Log (SML) | |
1649 | */ | |
1650 | static void __init prom_instantiate_sml(void) | |
1651 | { | |
1652 | phandle ibmvtpm_node; | |
1653 | ihandle ibmvtpm_inst; | |
b4ed0469 | 1654 | u32 entry = 0, size = 0, succ = 0; |
4a727429 | 1655 | u64 base; |
b4ed0469 | 1656 | __be32 val; |
4a727429 AL |
1657 | |
1658 | prom_debug("prom_instantiate_sml: start...\n"); | |
1659 | ||
2f82e982 | 1660 | ibmvtpm_node = call_prom("finddevice", 1, 1, ADDR("/vdevice/vtpm")); |
4a727429 AL |
1661 | prom_debug("ibmvtpm_node: %x\n", ibmvtpm_node); |
1662 | if (!PHANDLE_VALID(ibmvtpm_node)) | |
1663 | return; | |
1664 | ||
2f82e982 | 1665 | ibmvtpm_inst = call_prom("open", 1, 1, ADDR("/vdevice/vtpm")); |
4a727429 AL |
1666 | if (!IHANDLE_VALID(ibmvtpm_inst)) { |
1667 | prom_printf("opening vtpm package failed (%x)\n", ibmvtpm_inst); | |
1668 | return; | |
1669 | } | |
1670 | ||
b4ed0469 HCVL |
1671 | if (prom_getprop(ibmvtpm_node, "ibm,sml-efi-reformat-supported", |
1672 | &val, sizeof(val)) != PROM_ERROR) { | |
1673 | if (call_prom_ret("call-method", 2, 2, &succ, | |
1674 | ADDR("reformat-sml-to-efi-alignment"), | |
1675 | ibmvtpm_inst) != 0 || succ == 0) { | |
1676 | prom_printf("Reformat SML to EFI alignment failed\n"); | |
1677 | return; | |
1678 | } | |
b4ed0469 | 1679 | |
9e5d4af4 HCVL |
1680 | if (call_prom_ret("call-method", 2, 2, &size, |
1681 | ADDR("sml-get-allocated-size"), | |
1682 | ibmvtpm_inst) != 0 || size == 0) { | |
1683 | prom_printf("SML get allocated size failed\n"); | |
1684 | return; | |
1685 | } | |
1686 | } else { | |
1687 | if (call_prom_ret("call-method", 2, 2, &size, | |
1688 | ADDR("sml-get-handover-size"), | |
1689 | ibmvtpm_inst) != 0 || size == 0) { | |
1690 | prom_printf("SML get handover size failed\n"); | |
1691 | return; | |
1692 | } | |
4a727429 AL |
1693 | } |
1694 | ||
1695 | base = alloc_down(size, PAGE_SIZE, 0); | |
1696 | if (base == 0) | |
1697 | prom_panic("Could not allocate memory for sml\n"); | |
1698 | ||
eae5f709 | 1699 | prom_printf("instantiating sml at 0x%llx...", base); |
4a727429 | 1700 | |
9e5d4af4 HCVL |
1701 | memset((void *)base, 0, size); |
1702 | ||
4a727429 AL |
1703 | if (call_prom_ret("call-method", 4, 2, &entry, |
1704 | ADDR("sml-handover"), | |
1705 | ibmvtpm_inst, size, base) != 0 || entry == 0) { | |
1706 | prom_printf("SML handover failed\n"); | |
1707 | return; | |
1708 | } | |
1709 | prom_printf(" done\n"); | |
1710 | ||
1711 | reserve_mem(base, size); | |
1712 | ||
2f82e982 | 1713 | prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-base", |
4a727429 | 1714 | &base, sizeof(base)); |
2f82e982 | 1715 | prom_setprop(ibmvtpm_node, "/vdevice/vtpm", "linux,sml-size", |
4a727429 AL |
1716 | &size, sizeof(size)); |
1717 | ||
eae5f709 MM |
1718 | prom_debug("sml base = 0x%llx\n", base); |
1719 | prom_debug("sml size = 0x%x\n", size); | |
4a727429 AL |
1720 | |
1721 | prom_debug("prom_instantiate_sml: end...\n"); | |
1722 | } | |
1723 | ||
9b6b563c PM |
1724 | /* |
1725 | * Allocate room for and initialize TCE tables | |
1726 | */ | |
493adffc | 1727 | #ifdef __BIG_ENDIAN__ |
9b6b563c PM |
1728 | static void __init prom_initialize_tce_table(void) |
1729 | { | |
1730 | phandle node; | |
1731 | ihandle phb_node; | |
1732 | char compatible[64], type[64], model[64]; | |
5827d416 | 1733 | char *path = prom_scratch; |
9b6b563c PM |
1734 | u64 base, align; |
1735 | u32 minalign, minsize; | |
1736 | u64 tce_entry, *tce_entryp; | |
1737 | u64 local_alloc_top, local_alloc_bottom; | |
1738 | u64 i; | |
1739 | ||
5827d416 | 1740 | if (prom_iommu_off) |
9b6b563c PM |
1741 | return; |
1742 | ||
1743 | prom_debug("starting prom_initialize_tce_table\n"); | |
1744 | ||
1745 | /* Cache current top of allocs so we reserve a single block */ | |
5827d416 | 1746 | local_alloc_top = alloc_top_high; |
9b6b563c PM |
1747 | local_alloc_bottom = local_alloc_top; |
1748 | ||
1749 | /* Search all nodes looking for PHBs. */ | |
1750 | for (node = 0; prom_next_node(&node); ) { | |
1751 | compatible[0] = 0; | |
1752 | type[0] = 0; | |
1753 | model[0] = 0; | |
1754 | prom_getprop(node, "compatible", | |
1755 | compatible, sizeof(compatible)); | |
1756 | prom_getprop(node, "device_type", type, sizeof(type)); | |
1757 | prom_getprop(node, "model", model, sizeof(model)); | |
1758 | ||
5827d416 | 1759 | if ((type[0] == 0) || (strstr(type, "pci") == NULL)) |
9b6b563c PM |
1760 | continue; |
1761 | ||
e788ff13 | 1762 | /* Keep the old logic intact to avoid regression. */ |
9b6b563c | 1763 | if (compatible[0] != 0) { |
5827d416 AB |
1764 | if ((strstr(compatible, "python") == NULL) && |
1765 | (strstr(compatible, "Speedwagon") == NULL) && | |
1766 | (strstr(compatible, "Winnipeg") == NULL)) | |
9b6b563c PM |
1767 | continue; |
1768 | } else if (model[0] != 0) { | |
5827d416 AB |
1769 | if ((strstr(model, "ython") == NULL) && |
1770 | (strstr(model, "peedwagon") == NULL) && | |
1771 | (strstr(model, "innipeg") == NULL)) | |
9b6b563c PM |
1772 | continue; |
1773 | } | |
1774 | ||
1775 | if (prom_getprop(node, "tce-table-minalign", &minalign, | |
1776 | sizeof(minalign)) == PROM_ERROR) | |
1777 | minalign = 0; | |
1778 | if (prom_getprop(node, "tce-table-minsize", &minsize, | |
1779 | sizeof(minsize)) == PROM_ERROR) | |
1780 | minsize = 4UL << 20; | |
1781 | ||
1782 | /* | |
1783 | * Even though we read what OF wants, we just set the table | |
1784 | * size to 4 MB. This is enough to map 2GB of PCI DMA space. | |
1785 | * By doing this, we avoid the pitfalls of trying to DMA to | |
1786 | * MMIO space and the DMA alias hole. | |
9b6b563c | 1787 | */ |
471d7ff8 | 1788 | minsize = 4UL << 20; |
9b6b563c PM |
1789 | |
1790 | /* Align to the greater of the align or size */ | |
1791 | align = max(minalign, minsize); | |
1792 | base = alloc_down(minsize, align, 1); | |
1793 | if (base == 0) | |
1794 | prom_panic("ERROR, cannot find space for TCE table.\n"); | |
1795 | if (base < local_alloc_bottom) | |
1796 | local_alloc_bottom = base; | |
1797 | ||
9b6b563c | 1798 | /* It seems OF doesn't null-terminate the path :-( */ |
aca71ef8 | 1799 | memset(path, 0, PROM_SCRATCH_SIZE); |
9b6b563c PM |
1800 | /* Call OF to setup the TCE hardware */ |
1801 | if (call_prom("package-to-path", 3, 1, node, | |
1802 | path, PROM_SCRATCH_SIZE-1) == PROM_ERROR) { | |
1803 | prom_printf("package-to-path failed\n"); | |
1804 | } | |
1805 | ||
a23414be PM |
1806 | /* Save away the TCE table attributes for later use. */ |
1807 | prom_setprop(node, path, "linux,tce-base", &base, sizeof(base)); | |
1808 | prom_setprop(node, path, "linux,tce-size", &minsize, sizeof(minsize)); | |
1809 | ||
9b6b563c PM |
1810 | prom_debug("TCE table: %s\n", path); |
1811 | prom_debug("\tnode = 0x%x\n", node); | |
eae5f709 | 1812 | prom_debug("\tbase = 0x%llx\n", base); |
9b6b563c PM |
1813 | prom_debug("\tsize = 0x%x\n", minsize); |
1814 | ||
1815 | /* Initialize the table to have a one-to-one mapping | |
1816 | * over the allocated size. | |
1817 | */ | |
2b931fb6 | 1818 | tce_entryp = (u64 *)base; |
9b6b563c PM |
1819 | for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) { |
1820 | tce_entry = (i << PAGE_SHIFT); | |
1821 | tce_entry |= 0x3; | |
1822 | *tce_entryp = tce_entry; | |
1823 | } | |
1824 | ||
1825 | prom_printf("opening PHB %s", path); | |
1826 | phb_node = call_prom("open", 1, 1, path); | |
1827 | if (phb_node == 0) | |
1828 | prom_printf("... failed\n"); | |
1829 | else | |
1830 | prom_printf("... done\n"); | |
1831 | ||
1832 | call_prom("call-method", 6, 0, ADDR("set-64-bit-addressing"), | |
1833 | phb_node, -1, minsize, | |
1834 | (u32) base, (u32) (base >> 32)); | |
1835 | call_prom("close", 1, 0, phb_node); | |
1836 | } | |
1837 | ||
1838 | reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom); | |
1839 | ||
2babf5c2 ME |
1840 | /* These are only really needed if there is a memory limit in |
1841 | * effect, but we don't know so export them always. */ | |
5827d416 AB |
1842 | prom_tce_alloc_start = local_alloc_bottom; |
1843 | prom_tce_alloc_end = local_alloc_top; | |
9b6b563c PM |
1844 | |
1845 | /* Flag the first invalid entry */ | |
1846 | prom_debug("ending prom_initialize_tce_table\n"); | |
1847 | } | |
493adffc BH |
1848 | #endif /* __BIG_ENDIAN__ */ |
1849 | #endif /* CONFIG_PPC64 */ | |
9b6b563c PM |
1850 | |
1851 | /* | |
1852 | * With CHRP SMP we need to use the OF to start the other processors. | |
1853 | * We can't wait until smp_boot_cpus (the OF is trashed by then) | |
1854 | * so we have to put the processors into a holding pattern controlled | |
1855 | * by the kernel (not OF) before we destroy the OF. | |
1856 | * | |
1857 | * This uses a chunk of low memory, puts some holding pattern | |
1858 | * code there and sends the other processors off to there until | |
1859 | * smp_boot_cpus tells them to do something. The holding pattern | |
1860 | * checks that address until its cpu # is there, when it is that | |
1861 | * cpu jumps to __secondary_start(). smp_boot_cpus() takes care | |
1862 | * of setting those values. | |
1863 | * | |
1864 | * We also use physical address 0x4 here to tell when a cpu | |
1865 | * is in its holding pattern code. | |
1866 | * | |
1867 | * -- Cort | |
1868 | */ | |
bbd0abda PM |
1869 | /* |
1870 | * We want to reference the copy of __secondary_hold_* in the | |
1871 | * 0 - 0x100 address range | |
1872 | */ | |
1873 | #define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff) | |
1874 | ||
9b6b563c PM |
1875 | static void __init prom_hold_cpus(void) |
1876 | { | |
9b6b563c | 1877 | unsigned long i; |
9b6b563c PM |
1878 | phandle node; |
1879 | char type[64]; | |
9b6b563c | 1880 | unsigned long *spinloop |
bbd0abda | 1881 | = (void *) LOW_ADDR(__secondary_hold_spinloop); |
9b6b563c | 1882 | unsigned long *acknowledge |
bbd0abda | 1883 | = (void *) LOW_ADDR(__secondary_hold_acknowledge); |
bbd0abda | 1884 | unsigned long secondary_hold = LOW_ADDR(__secondary_hold); |
9b6b563c | 1885 | |
dbe78b40 BH |
1886 | /* |
1887 | * On pseries, if RTAS supports "query-cpu-stopped-state", | |
1888 | * we skip this stage, the CPUs will be started by the | |
1889 | * kernel using RTAS. | |
1890 | */ | |
1891 | if ((of_platform == PLATFORM_PSERIES || | |
1892 | of_platform == PLATFORM_PSERIES_LPAR) && | |
1893 | rtas_has_query_cpu_stopped) { | |
1894 | prom_printf("prom_hold_cpus: skipped\n"); | |
1895 | return; | |
1896 | } | |
1897 | ||
9b6b563c | 1898 | prom_debug("prom_hold_cpus: start...\n"); |
eae5f709 MM |
1899 | prom_debug(" 1) spinloop = 0x%lx\n", (unsigned long)spinloop); |
1900 | prom_debug(" 1) *spinloop = 0x%lx\n", *spinloop); | |
1901 | prom_debug(" 1) acknowledge = 0x%lx\n", | |
9b6b563c | 1902 | (unsigned long)acknowledge); |
eae5f709 MM |
1903 | prom_debug(" 1) *acknowledge = 0x%lx\n", *acknowledge); |
1904 | prom_debug(" 1) secondary_hold = 0x%lx\n", secondary_hold); | |
9b6b563c PM |
1905 | |
1906 | /* Set the common spinloop variable, so all of the secondary cpus | |
1907 | * will block when they are awakened from their OF spinloop. | |
1908 | * This must occur for both SMP and non SMP kernels, since OF will | |
1909 | * be trashed when we move the kernel. | |
1910 | */ | |
1911 | *spinloop = 0; | |
1912 | ||
9b6b563c PM |
1913 | /* look for cpus */ |
1914 | for (node = 0; prom_next_node(&node); ) { | |
493adffc BH |
1915 | unsigned int cpu_no; |
1916 | __be32 reg; | |
1917 | ||
9b6b563c PM |
1918 | type[0] = 0; |
1919 | prom_getprop(node, "device_type", type, sizeof(type)); | |
5827d416 | 1920 | if (strcmp(type, "cpu") != 0) |
9b6b563c PM |
1921 | continue; |
1922 | ||
1923 | /* Skip non-configured cpus. */ | |
1924 | if (prom_getprop(node, "status", type, sizeof(type)) > 0) | |
5827d416 | 1925 | if (strcmp(type, "okay") != 0) |
9b6b563c PM |
1926 | continue; |
1927 | ||
493adffc | 1928 | reg = cpu_to_be32(-1); /* make sparse happy */ |
9b6b563c | 1929 | prom_getprop(node, "reg", ®, sizeof(reg)); |
493adffc | 1930 | cpu_no = be32_to_cpu(reg); |
9b6b563c | 1931 | |
eae5f709 | 1932 | prom_debug("cpu hw idx = %u\n", cpu_no); |
9b6b563c PM |
1933 | |
1934 | /* Init the acknowledge var which will be reset by | |
1935 | * the secondary cpu when it awakens from its OF | |
1936 | * spinloop. | |
1937 | */ | |
1938 | *acknowledge = (unsigned long)-1; | |
1939 | ||
493adffc | 1940 | if (cpu_no != prom.cpu) { |
27f44888 | 1941 | /* Primary Thread of non-boot cpu or any thread */ |
eae5f709 | 1942 | prom_printf("starting cpu hw idx %u... ", cpu_no); |
9b6b563c | 1943 | call_prom("start-cpu", 3, 0, node, |
493adffc | 1944 | secondary_hold, cpu_no); |
9b6b563c | 1945 | |
bbd0abda PM |
1946 | for (i = 0; (i < 100000000) && |
1947 | (*acknowledge == ((unsigned long)-1)); i++ ) | |
9b6b563c PM |
1948 | mb(); |
1949 | ||
493adffc | 1950 | if (*acknowledge == cpu_no) |
9b6b563c | 1951 | prom_printf("done\n"); |
bbd0abda | 1952 | else |
eae5f709 | 1953 | prom_printf("failed: %lx\n", *acknowledge); |
9b6b563c PM |
1954 | } |
1955 | #ifdef CONFIG_SMP | |
1956 | else | |
eae5f709 | 1957 | prom_printf("boot cpu hw idx %u\n", cpu_no); |
9b6b563c | 1958 | #endif /* CONFIG_SMP */ |
9b6b563c | 1959 | } |
9b6b563c | 1960 | |
9b6b563c | 1961 | prom_debug("prom_hold_cpus: end...\n"); |
9b6b563c PM |
1962 | } |
1963 | ||
1964 | ||
1965 | static void __init prom_init_client_services(unsigned long pp) | |
1966 | { | |
9b6b563c | 1967 | /* Get a handle to the prom entry point before anything else */ |
5827d416 | 1968 | prom_entry = pp; |
9b6b563c PM |
1969 | |
1970 | /* get a handle for the stdout device */ | |
5827d416 AB |
1971 | prom.chosen = call_prom("finddevice", 1, 1, ADDR("/chosen")); |
1972 | if (!PHANDLE_VALID(prom.chosen)) | |
9b6b563c PM |
1973 | prom_panic("cannot find chosen"); /* msg won't be printed :( */ |
1974 | ||
1975 | /* get device tree root */ | |
5827d416 AB |
1976 | prom.root = call_prom("finddevice", 1, 1, ADDR("/")); |
1977 | if (!PHANDLE_VALID(prom.root)) | |
9b6b563c | 1978 | prom_panic("cannot find device tree root"); /* msg won't be printed :( */ |
a575b807 | 1979 | |
5827d416 | 1980 | prom.mmumap = 0; |
a575b807 PM |
1981 | } |
1982 | ||
1983 | #ifdef CONFIG_PPC32 | |
1984 | /* | |
1985 | * For really old powermacs, we need to map things we claim. | |
1986 | * For that, we need the ihandle of the mmu. | |
a23414be | 1987 | * Also, on the longtrail, we need to work around other bugs. |
a575b807 PM |
1988 | */ |
1989 | static void __init prom_find_mmu(void) | |
1990 | { | |
a575b807 PM |
1991 | phandle oprom; |
1992 | char version[64]; | |
1993 | ||
1994 | oprom = call_prom("finddevice", 1, 1, ADDR("/openprom")); | |
1995 | if (!PHANDLE_VALID(oprom)) | |
1996 | return; | |
1997 | if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0) | |
1998 | return; | |
1999 | version[sizeof(version) - 1] = 0; | |
a575b807 | 2000 | /* XXX might need to add other versions here */ |
a23414be PM |
2001 | if (strcmp(version, "Open Firmware, 1.0.5") == 0) |
2002 | of_workarounds = OF_WA_CLAIM; | |
2003 | else if (strncmp(version, "FirmWorks,3.", 12) == 0) { | |
2004 | of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL; | |
2005 | call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim"); | |
2006 | } else | |
a575b807 | 2007 | return; |
5827d416 AB |
2008 | prom.memory = call_prom("open", 1, 1, ADDR("/memory")); |
2009 | prom_getprop(prom.chosen, "mmu", &prom.mmumap, | |
2010 | sizeof(prom.mmumap)); | |
493adffc | 2011 | prom.mmumap = be32_to_cpu(prom.mmumap); |
5827d416 | 2012 | if (!IHANDLE_VALID(prom.memory) || !IHANDLE_VALID(prom.mmumap)) |
a23414be | 2013 | of_workarounds &= ~OF_WA_CLAIM; /* hmmm */ |
9b6b563c | 2014 | } |
a575b807 PM |
2015 | #else |
2016 | #define prom_find_mmu() | |
2017 | #endif | |
9b6b563c PM |
2018 | |
2019 | static void __init prom_init_stdout(void) | |
2020 | { | |
5827d416 | 2021 | char *path = of_stdout_device; |
9b6b563c | 2022 | char type[16]; |
493adffc BH |
2023 | phandle stdout_node; |
2024 | __be32 val; | |
9b6b563c | 2025 | |
5827d416 | 2026 | if (prom_getprop(prom.chosen, "stdout", &val, sizeof(val)) <= 0) |
9b6b563c PM |
2027 | prom_panic("cannot find stdout"); |
2028 | ||
493adffc | 2029 | prom.stdout = be32_to_cpu(val); |
9b6b563c PM |
2030 | |
2031 | /* Get the full OF pathname of the stdout device */ | |
2032 | memset(path, 0, 256); | |
5827d416 | 2033 | call_prom("instance-to-path", 3, 1, prom.stdout, path, 255); |
5827d416 AB |
2034 | prom_printf("OF stdout device is: %s\n", of_stdout_device); |
2035 | prom_setprop(prom.chosen, "/chosen", "linux,stdout-path", | |
a23414be | 2036 | path, strlen(path) + 1); |
9b6b563c | 2037 | |
10348f59 BH |
2038 | /* instance-to-package fails on PA-Semi */ |
2039 | stdout_node = call_prom("instance-to-package", 1, 1, prom.stdout); | |
2040 | if (stdout_node != PROM_ERROR) { | |
2041 | val = cpu_to_be32(stdout_node); | |
10348f59 BH |
2042 | |
2043 | /* If it's a display, note it */ | |
2044 | memset(type, 0, sizeof(type)); | |
2045 | prom_getprop(stdout_node, "device_type", type, sizeof(type)); | |
2046 | if (strcmp(type, "display") == 0) | |
2047 | prom_setprop(stdout_node, path, "linux,boot-display", NULL, 0); | |
2048 | } | |
9b6b563c PM |
2049 | } |
2050 | ||
9b6b563c PM |
2051 | static int __init prom_find_machine_type(void) |
2052 | { | |
9b6b563c PM |
2053 | char compat[256]; |
2054 | int len, i = 0; | |
21fe3301 | 2055 | #ifdef CONFIG_PPC64 |
9b6b563c | 2056 | phandle rtas; |
e8222502 | 2057 | int x; |
21fe3301 | 2058 | #endif |
e8222502 | 2059 | |
6e35d5da | 2060 | /* Look for a PowerMac or a Cell */ |
5827d416 | 2061 | len = prom_getprop(prom.root, "compatible", |
9b6b563c PM |
2062 | compat, sizeof(compat)-1); |
2063 | if (len > 0) { | |
2064 | compat[len] = 0; | |
2065 | while (i < len) { | |
2066 | char *p = &compat[i]; | |
2067 | int sl = strlen(p); | |
2068 | if (sl == 0) | |
2069 | break; | |
5827d416 AB |
2070 | if (strstr(p, "Power Macintosh") || |
2071 | strstr(p, "MacRISC")) | |
9b6b563c | 2072 | return PLATFORM_POWERMAC; |
133dda1e AB |
2073 | #ifdef CONFIG_PPC64 |
2074 | /* We must make sure we don't detect the IBM Cell | |
2075 | * blades as pSeries due to some firmware issues, | |
2076 | * so we do it here. | |
2077 | */ | |
5827d416 AB |
2078 | if (strstr(p, "IBM,CBEA") || |
2079 | strstr(p, "IBM,CPBW-1.0")) | |
133dda1e AB |
2080 | return PLATFORM_GENERIC; |
2081 | #endif /* CONFIG_PPC64 */ | |
9b6b563c PM |
2082 | i += sl + 1; |
2083 | } | |
2084 | } | |
2085 | #ifdef CONFIG_PPC64 | |
6e35d5da | 2086 | /* Try to figure out if it's an IBM pSeries or any other |
e8222502 BH |
2087 | * PAPR compliant platform. We assume it is if : |
2088 | * - /device_type is "chrp" (please, do NOT use that for future | |
2089 | * non-IBM designs ! | |
2090 | * - it has /rtas | |
2091 | */ | |
5827d416 | 2092 | len = prom_getprop(prom.root, "device_type", |
e8222502 BH |
2093 | compat, sizeof(compat)-1); |
2094 | if (len <= 0) | |
2095 | return PLATFORM_GENERIC; | |
5827d416 | 2096 | if (strcmp(compat, "chrp")) |
e8222502 BH |
2097 | return PLATFORM_GENERIC; |
2098 | ||
9b6b563c PM |
2099 | /* Default to pSeries. We need to know if we are running LPAR */ |
2100 | rtas = call_prom("finddevice", 1, 1, ADDR("/rtas")); | |
e8222502 BH |
2101 | if (!PHANDLE_VALID(rtas)) |
2102 | return PLATFORM_GENERIC; | |
2103 | x = prom_getproplen(rtas, "ibm,hypertas-functions"); | |
2104 | if (x != PROM_ERROR) { | |
4da727ae | 2105 | prom_debug("Hypertas detected, assuming LPAR !\n"); |
e8222502 | 2106 | return PLATFORM_PSERIES_LPAR; |
9b6b563c PM |
2107 | } |
2108 | return PLATFORM_PSERIES; | |
2109 | #else | |
e8222502 | 2110 | return PLATFORM_GENERIC; |
9b6b563c PM |
2111 | #endif |
2112 | } | |
2113 | ||
9b6b563c PM |
2114 | static int __init prom_set_color(ihandle ih, int i, int r, int g, int b) |
2115 | { | |
2116 | return call_prom("call-method", 6, 1, ADDR("color!"), ih, i, b, g, r); | |
2117 | } | |
2118 | ||
2119 | /* | |
2120 | * If we have a display that we don't know how to drive, | |
2121 | * we will want to try to execute OF's open method for it | |
2122 | * later. However, OF will probably fall over if we do that | |
2123 | * we've taken over the MMU. | |
2124 | * So we check whether we will need to open the display, | |
2125 | * and if so, open it now. | |
2126 | */ | |
2127 | static void __init prom_check_displays(void) | |
2128 | { | |
2129 | char type[16], *path; | |
2130 | phandle node; | |
2131 | ihandle ih; | |
2132 | int i; | |
9b6b563c | 2133 | |
d00e34b9 | 2134 | static const unsigned char default_colors[] __initconst = { |
9b6b563c PM |
2135 | 0x00, 0x00, 0x00, |
2136 | 0x00, 0x00, 0xaa, | |
2137 | 0x00, 0xaa, 0x00, | |
2138 | 0x00, 0xaa, 0xaa, | |
2139 | 0xaa, 0x00, 0x00, | |
2140 | 0xaa, 0x00, 0xaa, | |
2141 | 0xaa, 0xaa, 0x00, | |
2142 | 0xaa, 0xaa, 0xaa, | |
2143 | 0x55, 0x55, 0x55, | |
2144 | 0x55, 0x55, 0xff, | |
2145 | 0x55, 0xff, 0x55, | |
2146 | 0x55, 0xff, 0xff, | |
2147 | 0xff, 0x55, 0x55, | |
2148 | 0xff, 0x55, 0xff, | |
2149 | 0xff, 0xff, 0x55, | |
2150 | 0xff, 0xff, 0xff | |
2151 | }; | |
2152 | const unsigned char *clut; | |
2153 | ||
4da727ae | 2154 | prom_debug("Looking for displays\n"); |
9b6b563c PM |
2155 | for (node = 0; prom_next_node(&node); ) { |
2156 | memset(type, 0, sizeof(type)); | |
2157 | prom_getprop(node, "device_type", type, sizeof(type)); | |
5827d416 | 2158 | if (strcmp(type, "display") != 0) |
9b6b563c PM |
2159 | continue; |
2160 | ||
2161 | /* It seems OF doesn't null-terminate the path :-( */ | |
5827d416 | 2162 | path = prom_scratch; |
9b6b563c PM |
2163 | memset(path, 0, PROM_SCRATCH_SIZE); |
2164 | ||
2165 | /* | |
2166 | * leave some room at the end of the path for appending extra | |
2167 | * arguments | |
2168 | */ | |
2169 | if (call_prom("package-to-path", 3, 1, node, path, | |
2170 | PROM_SCRATCH_SIZE-10) == PROM_ERROR) | |
2171 | continue; | |
1f8737aa | 2172 | prom_printf("found display : %s, opening... ", path); |
9b6b563c PM |
2173 | |
2174 | ih = call_prom("open", 1, 1, path); | |
2175 | if (ih == 0) { | |
2176 | prom_printf("failed\n"); | |
2177 | continue; | |
2178 | } | |
2179 | ||
2180 | /* Success */ | |
2181 | prom_printf("done\n"); | |
a23414be | 2182 | prom_setprop(node, path, "linux,opened", NULL, 0); |
9b6b563c PM |
2183 | |
2184 | /* Setup a usable color table when the appropriate | |
2185 | * method is available. Should update this to set-colors */ | |
5827d416 | 2186 | clut = default_colors; |
3f53638c | 2187 | for (i = 0; i < 16; i++, clut += 3) |
9b6b563c PM |
2188 | if (prom_set_color(ih, i, clut[0], clut[1], |
2189 | clut[2]) != 0) | |
2190 | break; | |
2191 | ||
2192 | #ifdef CONFIG_LOGO_LINUX_CLUT224 | |
5827d416 AB |
2193 | clut = PTRRELOC(logo_linux_clut224.clut); |
2194 | for (i = 0; i < logo_linux_clut224.clutsize; i++, clut += 3) | |
9b6b563c PM |
2195 | if (prom_set_color(ih, i + 32, clut[0], clut[1], |
2196 | clut[2]) != 0) | |
2197 | break; | |
2198 | #endif /* CONFIG_LOGO_LINUX_CLUT224 */ | |
7191b615 BH |
2199 | |
2200 | #ifdef CONFIG_PPC_EARLY_DEBUG_BOOTX | |
2201 | if (prom_getprop(node, "linux,boot-display", NULL, 0) != | |
2202 | PROM_ERROR) { | |
2203 | u32 width, height, pitch, addr; | |
2204 | ||
2205 | prom_printf("Setting btext !\n"); | |
2206 | prom_getprop(node, "width", &width, 4); | |
2207 | prom_getprop(node, "height", &height, 4); | |
2208 | prom_getprop(node, "linebytes", &pitch, 4); | |
2209 | prom_getprop(node, "address", &addr, 4); | |
2210 | prom_printf("W=%d H=%d LB=%d addr=0x%x\n", | |
2211 | width, height, pitch, addr); | |
2212 | btext_setup_display(width, height, 8, pitch, addr); | |
2213 | } | |
2214 | #endif /* CONFIG_PPC_EARLY_DEBUG_BOOTX */ | |
9b6b563c PM |
2215 | } |
2216 | } | |
2217 | ||
2218 | ||
2219 | /* Return (relocated) pointer to this much memory: moves initrd if reqd. */ | |
2220 | static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end, | |
2221 | unsigned long needed, unsigned long align) | |
2222 | { | |
2223 | void *ret; | |
2224 | ||
2225 | *mem_start = _ALIGN(*mem_start, align); | |
2226 | while ((*mem_start + needed) > *mem_end) { | |
2227 | unsigned long room, chunk; | |
2228 | ||
eae5f709 | 2229 | prom_debug("Chunk exhausted, claiming more at %lx...\n", |
5827d416 AB |
2230 | alloc_bottom); |
2231 | room = alloc_top - alloc_bottom; | |
9b6b563c PM |
2232 | if (room > DEVTREE_CHUNK_SIZE) |
2233 | room = DEVTREE_CHUNK_SIZE; | |
2234 | if (room < PAGE_SIZE) | |
fbafd728 AB |
2235 | prom_panic("No memory for flatten_device_tree " |
2236 | "(no room)\n"); | |
9b6b563c PM |
2237 | chunk = alloc_up(room, 0); |
2238 | if (chunk == 0) | |
fbafd728 AB |
2239 | prom_panic("No memory for flatten_device_tree " |
2240 | "(claim failed)\n"); | |
966728dd | 2241 | *mem_end = chunk + room; |
9b6b563c PM |
2242 | } |
2243 | ||
2244 | ret = (void *)*mem_start; | |
2245 | *mem_start += needed; | |
2246 | ||
2247 | return ret; | |
2248 | } | |
2249 | ||
493adffc BH |
2250 | #define dt_push_token(token, mem_start, mem_end) do { \ |
2251 | void *room = make_room(mem_start, mem_end, 4, 4); \ | |
2252 | *(__be32 *)room = cpu_to_be32(token); \ | |
2253 | } while(0) | |
9b6b563c PM |
2254 | |
2255 | static unsigned long __init dt_find_string(char *str) | |
2256 | { | |
2257 | char *s, *os; | |
2258 | ||
5827d416 | 2259 | s = os = (char *)dt_string_start; |
9b6b563c | 2260 | s += 4; |
5827d416 | 2261 | while (s < (char *)dt_string_end) { |
9b6b563c PM |
2262 | if (strcmp(s, str) == 0) |
2263 | return s - os; | |
2264 | s += strlen(s) + 1; | |
2265 | } | |
2266 | return 0; | |
2267 | } | |
2268 | ||
2269 | /* | |
2270 | * The Open Firmware 1275 specification states properties must be 31 bytes or | |
2271 | * less, however not all firmwares obey this. Make it 64 bytes to be safe. | |
2272 | */ | |
2273 | #define MAX_PROPERTY_NAME 64 | |
2274 | ||
2275 | static void __init scan_dt_build_strings(phandle node, | |
2276 | unsigned long *mem_start, | |
2277 | unsigned long *mem_end) | |
2278 | { | |
2279 | char *prev_name, *namep, *sstart; | |
2280 | unsigned long soff; | |
2281 | phandle child; | |
2282 | ||
5827d416 | 2283 | sstart = (char *)dt_string_start; |
9b6b563c PM |
2284 | |
2285 | /* get and store all property names */ | |
5827d416 | 2286 | prev_name = ""; |
9b6b563c PM |
2287 | for (;;) { |
2288 | /* 64 is max len of name including nul. */ | |
2289 | namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, 1); | |
2290 | if (call_prom("nextprop", 3, 1, node, prev_name, namep) != 1) { | |
2291 | /* No more nodes: unwind alloc */ | |
2292 | *mem_start = (unsigned long)namep; | |
2293 | break; | |
2294 | } | |
2295 | ||
2296 | /* skip "name" */ | |
5827d416 | 2297 | if (strcmp(namep, "name") == 0) { |
9b6b563c | 2298 | *mem_start = (unsigned long)namep; |
5827d416 | 2299 | prev_name = "name"; |
9b6b563c PM |
2300 | continue; |
2301 | } | |
2302 | /* get/create string entry */ | |
2303 | soff = dt_find_string(namep); | |
2304 | if (soff != 0) { | |
2305 | *mem_start = (unsigned long)namep; | |
2306 | namep = sstart + soff; | |
2307 | } else { | |
2308 | /* Trim off some if we can */ | |
2309 | *mem_start = (unsigned long)namep + strlen(namep) + 1; | |
5827d416 | 2310 | dt_string_end = *mem_start; |
9b6b563c PM |
2311 | } |
2312 | prev_name = namep; | |
2313 | } | |
2314 | ||
2315 | /* do all our children */ | |
2316 | child = call_prom("child", 1, 1, node); | |
2317 | while (child != 0) { | |
2318 | scan_dt_build_strings(child, mem_start, mem_end); | |
2319 | child = call_prom("peer", 1, 1, child); | |
2320 | } | |
2321 | } | |
2322 | ||
2323 | static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start, | |
2324 | unsigned long *mem_end) | |
2325 | { | |
2326 | phandle child; | |
2327 | char *namep, *prev_name, *sstart, *p, *ep, *lp, *path; | |
2328 | unsigned long soff; | |
2329 | unsigned char *valp; | |
8ca2d515 | 2330 | static char pname[MAX_PROPERTY_NAME] __prombss; |
6e35d5da | 2331 | int l, room, has_phandle = 0; |
9b6b563c PM |
2332 | |
2333 | dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end); | |
2334 | ||
2335 | /* get the node's full name */ | |
2336 | namep = (char *)*mem_start; | |
c4988820 PM |
2337 | room = *mem_end - *mem_start; |
2338 | if (room > 255) | |
2339 | room = 255; | |
2340 | l = call_prom("package-to-path", 3, 1, node, namep, room); | |
9b6b563c PM |
2341 | if (l >= 0) { |
2342 | /* Didn't fit? Get more room. */ | |
c4988820 PM |
2343 | if (l >= room) { |
2344 | if (l >= *mem_end - *mem_start) | |
2345 | namep = make_room(mem_start, mem_end, l+1, 1); | |
9b6b563c PM |
2346 | call_prom("package-to-path", 3, 1, node, namep, l); |
2347 | } | |
2348 | namep[l] = '\0'; | |
2349 | ||
2350 | /* Fixup an Apple bug where they have bogus \0 chars in the | |
a575b807 PM |
2351 | * middle of the path in some properties, and extract |
2352 | * the unit name (everything after the last '/'). | |
9b6b563c | 2353 | */ |
a575b807 | 2354 | for (lp = p = namep, ep = namep + l; p < ep; p++) { |
9b6b563c | 2355 | if (*p == '/') |
a575b807 PM |
2356 | lp = namep; |
2357 | else if (*p != 0) | |
2358 | *lp++ = *p; | |
2359 | } | |
2360 | *lp = 0; | |
2361 | *mem_start = _ALIGN((unsigned long)lp + 1, 4); | |
9b6b563c PM |
2362 | } |
2363 | ||
2364 | /* get it again for debugging */ | |
5827d416 | 2365 | path = prom_scratch; |
9b6b563c PM |
2366 | memset(path, 0, PROM_SCRATCH_SIZE); |
2367 | call_prom("package-to-path", 3, 1, node, path, PROM_SCRATCH_SIZE-1); | |
2368 | ||
2369 | /* get and store all properties */ | |
5827d416 AB |
2370 | prev_name = ""; |
2371 | sstart = (char *)dt_string_start; | |
9b6b563c PM |
2372 | for (;;) { |
2373 | if (call_prom("nextprop", 3, 1, node, prev_name, | |
5827d416 | 2374 | pname) != 1) |
9b6b563c PM |
2375 | break; |
2376 | ||
2377 | /* skip "name" */ | |
5827d416 AB |
2378 | if (strcmp(pname, "name") == 0) { |
2379 | prev_name = "name"; | |
9b6b563c PM |
2380 | continue; |
2381 | } | |
2382 | ||
2383 | /* find string offset */ | |
5827d416 | 2384 | soff = dt_find_string(pname); |
9b6b563c PM |
2385 | if (soff == 0) { |
2386 | prom_printf("WARNING: Can't find string index for" | |
5827d416 | 2387 | " <%s>, node %s\n", pname, path); |
9b6b563c PM |
2388 | break; |
2389 | } | |
2390 | prev_name = sstart + soff; | |
2391 | ||
2392 | /* get length */ | |
5827d416 | 2393 | l = call_prom("getproplen", 2, 1, node, pname); |
9b6b563c PM |
2394 | |
2395 | /* sanity checks */ | |
2396 | if (l == PROM_ERROR) | |
2397 | continue; | |
9b6b563c PM |
2398 | |
2399 | /* push property head */ | |
2400 | dt_push_token(OF_DT_PROP, mem_start, mem_end); | |
2401 | dt_push_token(l, mem_start, mem_end); | |
2402 | dt_push_token(soff, mem_start, mem_end); | |
2403 | ||
2404 | /* push property content */ | |
2405 | valp = make_room(mem_start, mem_end, l, 4); | |
5827d416 | 2406 | call_prom("getprop", 4, 1, node, pname, valp, l); |
9b6b563c | 2407 | *mem_start = _ALIGN(*mem_start, 4); |
6e35d5da | 2408 | |
5827d416 | 2409 | if (!strcmp(pname, "phandle")) |
6e35d5da | 2410 | has_phandle = 1; |
9b6b563c PM |
2411 | } |
2412 | ||
f1f208e5 | 2413 | /* Add a "phandle" property if none already exist */ |
6e35d5da | 2414 | if (!has_phandle) { |
f1f208e5 | 2415 | soff = dt_find_string("phandle"); |
6e35d5da | 2416 | if (soff == 0) |
f1f208e5 | 2417 | prom_printf("WARNING: Can't find string index for <phandle> node %s\n", path); |
6e35d5da BH |
2418 | else { |
2419 | dt_push_token(OF_DT_PROP, mem_start, mem_end); | |
2420 | dt_push_token(4, mem_start, mem_end); | |
2421 | dt_push_token(soff, mem_start, mem_end); | |
2422 | valp = make_room(mem_start, mem_end, 4, 4); | |
493adffc | 2423 | *(__be32 *)valp = cpu_to_be32(node); |
6e35d5da | 2424 | } |
9b6b563c PM |
2425 | } |
2426 | ||
2427 | /* do all our children */ | |
2428 | child = call_prom("child", 1, 1, node); | |
2429 | while (child != 0) { | |
2430 | scan_dt_build_struct(child, mem_start, mem_end); | |
2431 | child = call_prom("peer", 1, 1, child); | |
2432 | } | |
2433 | ||
2434 | dt_push_token(OF_DT_END_NODE, mem_start, mem_end); | |
2435 | } | |
2436 | ||
2437 | static void __init flatten_device_tree(void) | |
2438 | { | |
2439 | phandle root; | |
2440 | unsigned long mem_start, mem_end, room; | |
2441 | struct boot_param_header *hdr; | |
9b6b563c PM |
2442 | char *namep; |
2443 | u64 *rsvmap; | |
2444 | ||
2445 | /* | |
2446 | * Check how much room we have between alloc top & bottom (+/- a | |
fbafd728 | 2447 | * few pages), crop to 1MB, as this is our "chunk" size |
9b6b563c | 2448 | */ |
5827d416 | 2449 | room = alloc_top - alloc_bottom - 0x4000; |
9b6b563c PM |
2450 | if (room > DEVTREE_CHUNK_SIZE) |
2451 | room = DEVTREE_CHUNK_SIZE; | |
eae5f709 | 2452 | prom_debug("starting device tree allocs at %lx\n", alloc_bottom); |
9b6b563c PM |
2453 | |
2454 | /* Now try to claim that */ | |
2455 | mem_start = (unsigned long)alloc_up(room, PAGE_SIZE); | |
2456 | if (mem_start == 0) | |
2457 | prom_panic("Can't allocate initial device-tree chunk\n"); | |
966728dd | 2458 | mem_end = mem_start + room; |
9b6b563c PM |
2459 | |
2460 | /* Get root of tree */ | |
2461 | root = call_prom("peer", 1, 1, (phandle)0); | |
2462 | if (root == (phandle)0) | |
2463 | prom_panic ("couldn't get device tree root\n"); | |
2464 | ||
2465 | /* Build header and make room for mem rsv map */ | |
2466 | mem_start = _ALIGN(mem_start, 4); | |
2467 | hdr = make_room(&mem_start, &mem_end, | |
2468 | sizeof(struct boot_param_header), 4); | |
5827d416 | 2469 | dt_header_start = (unsigned long)hdr; |
9b6b563c PM |
2470 | rsvmap = make_room(&mem_start, &mem_end, sizeof(mem_reserve_map), 8); |
2471 | ||
2472 | /* Start of strings */ | |
2473 | mem_start = PAGE_ALIGN(mem_start); | |
5827d416 | 2474 | dt_string_start = mem_start; |
9b6b563c PM |
2475 | mem_start += 4; /* hole */ |
2476 | ||
f1f208e5 | 2477 | /* Add "phandle" in there, we'll need it */ |
9b6b563c | 2478 | namep = make_room(&mem_start, &mem_end, 16, 1); |
f1f208e5 | 2479 | strcpy(namep, "phandle"); |
9b6b563c PM |
2480 | mem_start = (unsigned long)namep + strlen(namep) + 1; |
2481 | ||
2482 | /* Build string array */ | |
2483 | prom_printf("Building dt strings...\n"); | |
2484 | scan_dt_build_strings(root, &mem_start, &mem_end); | |
5827d416 | 2485 | dt_string_end = mem_start; |
9b6b563c PM |
2486 | |
2487 | /* Build structure */ | |
2488 | mem_start = PAGE_ALIGN(mem_start); | |
5827d416 | 2489 | dt_struct_start = mem_start; |
9b6b563c PM |
2490 | prom_printf("Building dt structure...\n"); |
2491 | scan_dt_build_struct(root, &mem_start, &mem_end); | |
2492 | dt_push_token(OF_DT_END, &mem_start, &mem_end); | |
5827d416 | 2493 | dt_struct_end = PAGE_ALIGN(mem_start); |
9b6b563c PM |
2494 | |
2495 | /* Finish header */ | |
493adffc BH |
2496 | hdr->boot_cpuid_phys = cpu_to_be32(prom.cpu); |
2497 | hdr->magic = cpu_to_be32(OF_DT_HEADER); | |
2498 | hdr->totalsize = cpu_to_be32(dt_struct_end - dt_header_start); | |
2499 | hdr->off_dt_struct = cpu_to_be32(dt_struct_start - dt_header_start); | |
2500 | hdr->off_dt_strings = cpu_to_be32(dt_string_start - dt_header_start); | |
2501 | hdr->dt_strings_size = cpu_to_be32(dt_string_end - dt_string_start); | |
2502 | hdr->off_mem_rsvmap = cpu_to_be32(((unsigned long)rsvmap) - dt_header_start); | |
2503 | hdr->version = cpu_to_be32(OF_DT_VERSION); | |
9b6b563c | 2504 | /* Version 16 is not backward compatible */ |
493adffc | 2505 | hdr->last_comp_version = cpu_to_be32(0x10); |
9b6b563c | 2506 | |
4d1f3f25 | 2507 | /* Copy the reserve map in */ |
5827d416 | 2508 | memcpy(rsvmap, mem_reserve_map, sizeof(mem_reserve_map)); |
9b6b563c PM |
2509 | |
2510 | #ifdef DEBUG_PROM | |
2511 | { | |
2512 | int i; | |
2513 | prom_printf("reserved memory map:\n"); | |
5827d416 | 2514 | for (i = 0; i < mem_reserve_cnt; i++) |
eae5f709 | 2515 | prom_printf(" %llx - %llx\n", |
493adffc BH |
2516 | be64_to_cpu(mem_reserve_map[i].base), |
2517 | be64_to_cpu(mem_reserve_map[i].size)); | |
9b6b563c PM |
2518 | } |
2519 | #endif | |
4d1f3f25 JX |
2520 | /* Bump mem_reserve_cnt to cause further reservations to fail |
2521 | * since it's too late. | |
2522 | */ | |
5827d416 | 2523 | mem_reserve_cnt = MEM_RESERVE_MAP_SIZE; |
9b6b563c | 2524 | |
eae5f709 | 2525 | prom_printf("Device tree strings 0x%lx -> 0x%lx\n", |
5827d416 | 2526 | dt_string_start, dt_string_end); |
eae5f709 | 2527 | prom_printf("Device tree struct 0x%lx -> 0x%lx\n", |
5827d416 | 2528 | dt_struct_start, dt_struct_end); |
9b6b563c PM |
2529 | } |
2530 | ||
54f4ee18 HB |
2531 | #ifdef CONFIG_PPC_MAPLE |
2532 | /* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property. | |
2533 | * The values are bad, and it doesn't even have the right number of cells. */ | |
2534 | static void __init fixup_device_tree_maple(void) | |
9b6b563c | 2535 | { |
54f4ee18 | 2536 | phandle isa; |
980a6513 | 2537 | u32 rloc = 0x01002000; /* IO space; PCI device = 4 */ |
54f4ee18 | 2538 | u32 isa_ranges[6]; |
980a6513 BH |
2539 | char *name; |
2540 | ||
2541 | name = "/ht@0/isa@4"; | |
2542 | isa = call_prom("finddevice", 1, 1, ADDR(name)); | |
2543 | if (!PHANDLE_VALID(isa)) { | |
2544 | name = "/ht@0/isa@6"; | |
2545 | isa = call_prom("finddevice", 1, 1, ADDR(name)); | |
2546 | rloc = 0x01003000; /* IO space; PCI device = 6 */ | |
2547 | } | |
54f4ee18 HB |
2548 | if (!PHANDLE_VALID(isa)) |
2549 | return; | |
2550 | ||
980a6513 BH |
2551 | if (prom_getproplen(isa, "ranges") != 12) |
2552 | return; | |
54f4ee18 HB |
2553 | if (prom_getprop(isa, "ranges", isa_ranges, sizeof(isa_ranges)) |
2554 | == PROM_ERROR) | |
2555 | return; | |
2556 | ||
2557 | if (isa_ranges[0] != 0x1 || | |
2558 | isa_ranges[1] != 0xf4000000 || | |
2559 | isa_ranges[2] != 0x00010000) | |
2560 | return; | |
2561 | ||
980a6513 | 2562 | prom_printf("Fixing up bogus ISA range on Maple/Apache...\n"); |
54f4ee18 HB |
2563 | |
2564 | isa_ranges[0] = 0x1; | |
2565 | isa_ranges[1] = 0x0; | |
980a6513 | 2566 | isa_ranges[2] = rloc; |
54f4ee18 HB |
2567 | isa_ranges[3] = 0x0; |
2568 | isa_ranges[4] = 0x0; | |
2569 | isa_ranges[5] = 0x00010000; | |
980a6513 | 2570 | prom_setprop(isa, name, "ranges", |
54f4ee18 HB |
2571 | isa_ranges, sizeof(isa_ranges)); |
2572 | } | |
8f101a05 HC |
2573 | |
2574 | #define CPC925_MC_START 0xf8000000 | |
2575 | #define CPC925_MC_LENGTH 0x1000000 | |
2576 | /* The values for memory-controller don't have right number of cells */ | |
2577 | static void __init fixup_device_tree_maple_memory_controller(void) | |
2578 | { | |
2579 | phandle mc; | |
2580 | u32 mc_reg[4]; | |
2581 | char *name = "/hostbridge@f8000000"; | |
8f101a05 HC |
2582 | u32 ac, sc; |
2583 | ||
2584 | mc = call_prom("finddevice", 1, 1, ADDR(name)); | |
2585 | if (!PHANDLE_VALID(mc)) | |
2586 | return; | |
2587 | ||
2588 | if (prom_getproplen(mc, "reg") != 8) | |
2589 | return; | |
2590 | ||
5827d416 AB |
2591 | prom_getprop(prom.root, "#address-cells", &ac, sizeof(ac)); |
2592 | prom_getprop(prom.root, "#size-cells", &sc, sizeof(sc)); | |
8f101a05 HC |
2593 | if ((ac != 2) || (sc != 2)) |
2594 | return; | |
2595 | ||
2596 | if (prom_getprop(mc, "reg", mc_reg, sizeof(mc_reg)) == PROM_ERROR) | |
2597 | return; | |
2598 | ||
2599 | if (mc_reg[0] != CPC925_MC_START || mc_reg[1] != CPC925_MC_LENGTH) | |
2600 | return; | |
2601 | ||
2602 | prom_printf("Fixing up bogus hostbridge on Maple...\n"); | |
2603 | ||
2604 | mc_reg[0] = 0x0; | |
2605 | mc_reg[1] = CPC925_MC_START; | |
2606 | mc_reg[2] = 0x0; | |
2607 | mc_reg[3] = CPC925_MC_LENGTH; | |
2608 | prom_setprop(mc, name, "reg", mc_reg, sizeof(mc_reg)); | |
2609 | } | |
54f4ee18 HB |
2610 | #else |
2611 | #define fixup_device_tree_maple() | |
8f101a05 | 2612 | #define fixup_device_tree_maple_memory_controller() |
54f4ee18 HB |
2613 | #endif |
2614 | ||
e8c0acf9 | 2615 | #ifdef CONFIG_PPC_CHRP |
e4805922 OH |
2616 | /* |
2617 | * Pegasos and BriQ lacks the "ranges" property in the isa node | |
2618 | * Pegasos needs decimal IRQ 14/15, not hexadecimal | |
556ecf9b | 2619 | * Pegasos has the IDE configured in legacy mode, but advertised as native |
e4805922 | 2620 | */ |
e8c0acf9 BH |
2621 | static void __init fixup_device_tree_chrp(void) |
2622 | { | |
e4805922 OH |
2623 | phandle ph; |
2624 | u32 prop[6]; | |
26c5032e | 2625 | u32 rloc = 0x01006000; /* IO space; PCI device = 12 */ |
e8c0acf9 BH |
2626 | char *name; |
2627 | int rc; | |
2628 | ||
2629 | name = "/pci@80000000/isa@c"; | |
e4805922 OH |
2630 | ph = call_prom("finddevice", 1, 1, ADDR(name)); |
2631 | if (!PHANDLE_VALID(ph)) { | |
26c5032e | 2632 | name = "/pci@ff500000/isa@6"; |
e4805922 | 2633 | ph = call_prom("finddevice", 1, 1, ADDR(name)); |
26c5032e BH |
2634 | rloc = 0x01003000; /* IO space; PCI device = 6 */ |
2635 | } | |
e4805922 OH |
2636 | if (PHANDLE_VALID(ph)) { |
2637 | rc = prom_getproplen(ph, "ranges"); | |
2638 | if (rc == 0 || rc == PROM_ERROR) { | |
2639 | prom_printf("Fixing up missing ISA range on Pegasos...\n"); | |
2640 | ||
2641 | prop[0] = 0x1; | |
2642 | prop[1] = 0x0; | |
2643 | prop[2] = rloc; | |
2644 | prop[3] = 0x0; | |
2645 | prop[4] = 0x0; | |
2646 | prop[5] = 0x00010000; | |
2647 | prom_setprop(ph, name, "ranges", prop, sizeof(prop)); | |
2648 | } | |
2649 | } | |
e8c0acf9 | 2650 | |
e4805922 OH |
2651 | name = "/pci@80000000/ide@C,1"; |
2652 | ph = call_prom("finddevice", 1, 1, ADDR(name)); | |
2653 | if (PHANDLE_VALID(ph)) { | |
2654 | prom_printf("Fixing up IDE interrupt on Pegasos...\n"); | |
2655 | prop[0] = 14; | |
2656 | prop[1] = 0x0; | |
556ecf9b OH |
2657 | prom_setprop(ph, name, "interrupts", prop, 2*sizeof(u32)); |
2658 | prom_printf("Fixing up IDE class-code on Pegasos...\n"); | |
2659 | rc = prom_getprop(ph, "class-code", prop, sizeof(u32)); | |
2660 | if (rc == sizeof(u32)) { | |
2661 | prop[0] &= ~0x5; | |
2662 | prom_setprop(ph, name, "class-code", prop, sizeof(u32)); | |
2663 | } | |
e4805922 | 2664 | } |
e8c0acf9 BH |
2665 | } |
2666 | #else | |
2667 | #define fixup_device_tree_chrp() | |
2668 | #endif | |
2669 | ||
9b6b563c | 2670 | #if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC) |
54f4ee18 HB |
2671 | static void __init fixup_device_tree_pmac(void) |
2672 | { | |
9b6b563c PM |
2673 | phandle u3, i2c, mpic; |
2674 | u32 u3_rev; | |
2675 | u32 interrupts[2]; | |
2676 | u32 parent; | |
2677 | ||
2678 | /* Some G5s have a missing interrupt definition, fix it up here */ | |
2679 | u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000")); | |
2680 | if (!PHANDLE_VALID(u3)) | |
2681 | return; | |
2682 | i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000")); | |
2683 | if (!PHANDLE_VALID(i2c)) | |
2684 | return; | |
2685 | mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000")); | |
2686 | if (!PHANDLE_VALID(mpic)) | |
2687 | return; | |
2688 | ||
2689 | /* check if proper rev of u3 */ | |
2690 | if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev)) | |
2691 | == PROM_ERROR) | |
2692 | return; | |
7d49697e | 2693 | if (u3_rev < 0x35 || u3_rev > 0x39) |
9b6b563c PM |
2694 | return; |
2695 | /* does it need fixup ? */ | |
2696 | if (prom_getproplen(i2c, "interrupts") > 0) | |
2697 | return; | |
2698 | ||
2699 | prom_printf("fixing up bogus interrupts for u3 i2c...\n"); | |
2700 | ||
2701 | /* interrupt on this revision of u3 is number 0 and level */ | |
2702 | interrupts[0] = 0; | |
2703 | interrupts[1] = 1; | |
a23414be PM |
2704 | prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupts", |
2705 | &interrupts, sizeof(interrupts)); | |
9b6b563c | 2706 | parent = (u32)mpic; |
a23414be PM |
2707 | prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000", "interrupt-parent", |
2708 | &parent, sizeof(parent)); | |
9b6b563c | 2709 | } |
54f4ee18 HB |
2710 | #else |
2711 | #define fixup_device_tree_pmac() | |
2712 | #endif | |
9b6b563c | 2713 | |
88fd2a9d | 2714 | #ifdef CONFIG_PPC_EFIKA |
94d2dde7 GL |
2715 | /* |
2716 | * The MPC5200 FEC driver requires an phy-handle property to tell it how | |
2717 | * to talk to the phy. If the phy-handle property is missing, then this | |
2718 | * function is called to add the appropriate nodes and link it to the | |
2719 | * ethernet node. | |
2720 | */ | |
2721 | static void __init fixup_device_tree_efika_add_phy(void) | |
88fd2a9d | 2722 | { |
88fd2a9d SM |
2723 | u32 node; |
2724 | char prop[64]; | |
94d2dde7 | 2725 | int rv; |
88fd2a9d | 2726 | |
94d2dde7 GL |
2727 | /* Check if /builtin/ethernet exists - bail if it doesn't */ |
2728 | node = call_prom("finddevice", 1, 1, ADDR("/builtin/ethernet")); | |
88fd2a9d SM |
2729 | if (!PHANDLE_VALID(node)) |
2730 | return; | |
2731 | ||
94d2dde7 GL |
2732 | /* Check if the phy-handle property exists - bail if it does */ |
2733 | rv = prom_getprop(node, "phy-handle", prop, sizeof(prop)); | |
2734 | if (!rv) | |
88fd2a9d SM |
2735 | return; |
2736 | ||
94d2dde7 GL |
2737 | /* |
2738 | * At this point the ethernet device doesn't have a phy described. | |
2739 | * Now we need to add the missing phy node and linkage | |
2740 | */ | |
6f4347c9 | 2741 | |
94d2dde7 | 2742 | /* Check for an MDIO bus node - if missing then create one */ |
6f4347c9 OH |
2743 | node = call_prom("finddevice", 1, 1, ADDR("/builtin/mdio")); |
2744 | if (!PHANDLE_VALID(node)) { | |
2745 | prom_printf("Adding Ethernet MDIO node\n"); | |
2746 | call_prom("interpret", 1, 1, | |
2747 | " s\" /builtin\" find-device" | |
2748 | " new-device" | |
2749 | " 1 encode-int s\" #address-cells\" property" | |
2750 | " 0 encode-int s\" #size-cells\" property" | |
94d2dde7 GL |
2751 | " s\" mdio\" device-name" |
2752 | " s\" fsl,mpc5200b-mdio\" encode-string" | |
6f4347c9 OH |
2753 | " s\" compatible\" property" |
2754 | " 0xf0003000 0x400 reg" | |
2755 | " 0x2 encode-int" | |
2756 | " 0x5 encode-int encode+" | |
2757 | " 0x3 encode-int encode+" | |
2758 | " s\" interrupts\" property" | |
2759 | " finish-device"); | |
2760 | }; | |
2761 | ||
94d2dde7 GL |
2762 | /* Check for a PHY device node - if missing then create one and |
2763 | * give it's phandle to the ethernet node */ | |
2764 | node = call_prom("finddevice", 1, 1, | |
2765 | ADDR("/builtin/mdio/ethernet-phy")); | |
6f4347c9 OH |
2766 | if (!PHANDLE_VALID(node)) { |
2767 | prom_printf("Adding Ethernet PHY node\n"); | |
2768 | call_prom("interpret", 1, 1, | |
2769 | " s\" /builtin/mdio\" find-device" | |
2770 | " new-device" | |
2771 | " s\" ethernet-phy\" device-name" | |
2772 | " 0x10 encode-int s\" reg\" property" | |
2773 | " my-self" | |
2774 | " ihandle>phandle" | |
2775 | " finish-device" | |
2776 | " s\" /builtin/ethernet\" find-device" | |
2777 | " encode-int" | |
2778 | " s\" phy-handle\" property" | |
2779 | " device-end"); | |
2780 | } | |
94d2dde7 GL |
2781 | } |
2782 | ||
2783 | static void __init fixup_device_tree_efika(void) | |
2784 | { | |
2785 | int sound_irq[3] = { 2, 2, 0 }; | |
2786 | int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0, | |
2787 | 3,4,0, 3,5,0, 3,6,0, 3,7,0, | |
2788 | 3,8,0, 3,9,0, 3,10,0, 3,11,0, | |
2789 | 3,12,0, 3,13,0, 3,14,0, 3,15,0 }; | |
2790 | u32 node; | |
2791 | char prop[64]; | |
2792 | int rv, len; | |
2793 | ||
2794 | /* Check if we're really running on a EFIKA */ | |
2795 | node = call_prom("finddevice", 1, 1, ADDR("/")); | |
2796 | if (!PHANDLE_VALID(node)) | |
2797 | return; | |
2798 | ||
2799 | rv = prom_getprop(node, "model", prop, sizeof(prop)); | |
2800 | if (rv == PROM_ERROR) | |
2801 | return; | |
2802 | if (strcmp(prop, "EFIKA5K2")) | |
2803 | return; | |
2804 | ||
2805 | prom_printf("Applying EFIKA device tree fixups\n"); | |
2806 | ||
2807 | /* Claiming to be 'chrp' is death */ | |
2808 | node = call_prom("finddevice", 1, 1, ADDR("/")); | |
2809 | rv = prom_getprop(node, "device_type", prop, sizeof(prop)); | |
2810 | if (rv != PROM_ERROR && (strcmp(prop, "chrp") == 0)) | |
2811 | prom_setprop(node, "/", "device_type", "efika", sizeof("efika")); | |
2812 | ||
7f4392cd DW |
2813 | /* CODEGEN,description is exposed in /proc/cpuinfo so |
2814 | fix that too */ | |
2815 | rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop)); | |
2816 | if (rv != PROM_ERROR && (strstr(prop, "CHRP"))) | |
2817 | prom_setprop(node, "/", "CODEGEN,description", | |
2818 | "Efika 5200B PowerPC System", | |
2819 | sizeof("Efika 5200B PowerPC System")); | |
2820 | ||
94d2dde7 GL |
2821 | /* Fixup bestcomm interrupts property */ |
2822 | node = call_prom("finddevice", 1, 1, ADDR("/builtin/bestcomm")); | |
2823 | if (PHANDLE_VALID(node)) { | |
2824 | len = prom_getproplen(node, "interrupts"); | |
2825 | if (len == 12) { | |
2826 | prom_printf("Fixing bestcomm interrupts property\n"); | |
2827 | prom_setprop(node, "/builtin/bestcom", "interrupts", | |
2828 | bcomm_irq, sizeof(bcomm_irq)); | |
2829 | } | |
2830 | } | |
2831 | ||
2832 | /* Fixup sound interrupts property */ | |
2833 | node = call_prom("finddevice", 1, 1, ADDR("/builtin/sound")); | |
2834 | if (PHANDLE_VALID(node)) { | |
2835 | rv = prom_getprop(node, "interrupts", prop, sizeof(prop)); | |
2836 | if (rv == PROM_ERROR) { | |
2837 | prom_printf("Adding sound interrupts property\n"); | |
2838 | prom_setprop(node, "/builtin/sound", "interrupts", | |
2839 | sound_irq, sizeof(sound_irq)); | |
2840 | } | |
2841 | } | |
6f4347c9 | 2842 | |
94d2dde7 GL |
2843 | /* Make sure ethernet phy-handle property exists */ |
2844 | fixup_device_tree_efika_add_phy(); | |
88fd2a9d SM |
2845 | } |
2846 | #else | |
2847 | #define fixup_device_tree_efika() | |
2848 | #endif | |
2849 | ||
50246787 DS |
2850 | #ifdef CONFIG_PPC_PASEMI_NEMO |
2851 | /* | |
2852 | * CFE supplied on Nemo is broken in several ways, biggest | |
2853 | * problem is that it reassigns ISA interrupts to unused mpic ints. | |
2854 | * Add an interrupt-controller property for the io-bridge to use | |
2855 | * and correct the ints so we can attach them to an irq_domain | |
2856 | */ | |
2857 | static void __init fixup_device_tree_pasemi(void) | |
2858 | { | |
2859 | u32 interrupts[2], parent, rval, val = 0; | |
2860 | char *name, *pci_name; | |
2861 | phandle iob, node; | |
2862 | ||
2863 | /* Find the root pci node */ | |
2864 | name = "/pxp@0,e0000000"; | |
2865 | iob = call_prom("finddevice", 1, 1, ADDR(name)); | |
2866 | if (!PHANDLE_VALID(iob)) | |
2867 | return; | |
2868 | ||
2869 | /* check if interrupt-controller node set yet */ | |
2870 | if (prom_getproplen(iob, "interrupt-controller") !=PROM_ERROR) | |
2871 | return; | |
2872 | ||
2873 | prom_printf("adding interrupt-controller property for SB600...\n"); | |
2874 | ||
2875 | prom_setprop(iob, name, "interrupt-controller", &val, 0); | |
2876 | ||
2877 | pci_name = "/pxp@0,e0000000/pci@11"; | |
2878 | node = call_prom("finddevice", 1, 1, ADDR(pci_name)); | |
2879 | parent = ADDR(iob); | |
2880 | ||
2881 | for( ; prom_next_node(&node); ) { | |
2882 | /* scan each node for one with an interrupt */ | |
2883 | if (!PHANDLE_VALID(node)) | |
2884 | continue; | |
2885 | ||
2886 | rval = prom_getproplen(node, "interrupts"); | |
2887 | if (rval == 0 || rval == PROM_ERROR) | |
2888 | continue; | |
2889 | ||
2890 | prom_getprop(node, "interrupts", &interrupts, sizeof(interrupts)); | |
2891 | if ((interrupts[0] < 212) || (interrupts[0] > 222)) | |
2892 | continue; | |
2893 | ||
2894 | /* found a node, update both interrupts and interrupt-parent */ | |
2895 | if ((interrupts[0] >= 212) && (interrupts[0] <= 215)) | |
2896 | interrupts[0] -= 203; | |
2897 | if ((interrupts[0] >= 216) && (interrupts[0] <= 220)) | |
2898 | interrupts[0] -= 213; | |
2899 | if (interrupts[0] == 221) | |
2900 | interrupts[0] = 14; | |
2901 | if (interrupts[0] == 222) | |
2902 | interrupts[0] = 8; | |
2903 | ||
2904 | prom_setprop(node, pci_name, "interrupts", interrupts, | |
2905 | sizeof(interrupts)); | |
2906 | prom_setprop(node, pci_name, "interrupt-parent", &parent, | |
2907 | sizeof(parent)); | |
2908 | } | |
687e16bc DS |
2909 | |
2910 | /* | |
2911 | * The io-bridge has device_type set to 'io-bridge' change it to 'isa' | |
2912 | * so that generic isa-bridge code can add the SB600 and its on-board | |
2913 | * peripherals. | |
2914 | */ | |
2915 | name = "/pxp@0,e0000000/io-bridge@0"; | |
2916 | iob = call_prom("finddevice", 1, 1, ADDR(name)); | |
2917 | if (!PHANDLE_VALID(iob)) | |
2918 | return; | |
2919 | ||
2920 | /* device_type is already set, just change it. */ | |
2921 | ||
2922 | prom_printf("Changing device_type of SB600 node...\n"); | |
2923 | ||
2924 | prom_setprop(iob, name, "device_type", "isa", sizeof("isa")); | |
50246787 DS |
2925 | } |
2926 | #else /* !CONFIG_PPC_PASEMI_NEMO */ | |
2927 | static inline void fixup_device_tree_pasemi(void) { } | |
2928 | #endif | |
2929 | ||
54f4ee18 HB |
2930 | static void __init fixup_device_tree(void) |
2931 | { | |
2932 | fixup_device_tree_maple(); | |
8f101a05 | 2933 | fixup_device_tree_maple_memory_controller(); |
e8c0acf9 | 2934 | fixup_device_tree_chrp(); |
54f4ee18 | 2935 | fixup_device_tree_pmac(); |
88fd2a9d | 2936 | fixup_device_tree_efika(); |
50246787 | 2937 | fixup_device_tree_pasemi(); |
54f4ee18 | 2938 | } |
9b6b563c PM |
2939 | |
2940 | static void __init prom_find_boot_cpu(void) | |
2941 | { | |
493adffc | 2942 | __be32 rval; |
9b6b563c PM |
2943 | ihandle prom_cpu; |
2944 | phandle cpu_pkg; | |
2945 | ||
493adffc BH |
2946 | rval = 0; |
2947 | if (prom_getprop(prom.chosen, "cpu", &rval, sizeof(rval)) <= 0) | |
a575b807 | 2948 | return; |
493adffc | 2949 | prom_cpu = be32_to_cpu(rval); |
9b6b563c PM |
2950 | |
2951 | cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu); | |
2952 | ||
af2b7fa1 DS |
2953 | if (!PHANDLE_VALID(cpu_pkg)) |
2954 | return; | |
2955 | ||
493adffc BH |
2956 | prom_getprop(cpu_pkg, "reg", &rval, sizeof(rval)); |
2957 | prom.cpu = be32_to_cpu(rval); | |
9b6b563c | 2958 | |
eae5f709 | 2959 | prom_debug("Booting CPU hw index = %d\n", prom.cpu); |
9b6b563c PM |
2960 | } |
2961 | ||
2962 | static void __init prom_check_initrd(unsigned long r3, unsigned long r4) | |
2963 | { | |
2964 | #ifdef CONFIG_BLK_DEV_INITRD | |
9b6b563c | 2965 | if (r3 && r4 && r4 != 0xdeadbeef) { |
493adffc | 2966 | __be64 val; |
9b6b563c | 2967 | |
5827d416 AB |
2968 | prom_initrd_start = is_kernel_addr(r3) ? __pa(r3) : r3; |
2969 | prom_initrd_end = prom_initrd_start + r4; | |
9b6b563c | 2970 | |
493adffc | 2971 | val = cpu_to_be64(prom_initrd_start); |
5827d416 | 2972 | prom_setprop(prom.chosen, "/chosen", "linux,initrd-start", |
a23414be | 2973 | &val, sizeof(val)); |
493adffc | 2974 | val = cpu_to_be64(prom_initrd_end); |
5827d416 | 2975 | prom_setprop(prom.chosen, "/chosen", "linux,initrd-end", |
a23414be | 2976 | &val, sizeof(val)); |
9b6b563c | 2977 | |
5827d416 AB |
2978 | reserve_mem(prom_initrd_start, |
2979 | prom_initrd_end - prom_initrd_start); | |
9b6b563c | 2980 | |
eae5f709 MM |
2981 | prom_debug("initrd_start=0x%lx\n", prom_initrd_start); |
2982 | prom_debug("initrd_end=0x%lx\n", prom_initrd_end); | |
9b6b563c PM |
2983 | } |
2984 | #endif /* CONFIG_BLK_DEV_INITRD */ | |
2985 | } | |
2986 | ||
5ac47f7a AB |
2987 | #ifdef CONFIG_PPC64 |
2988 | #ifdef CONFIG_RELOCATABLE | |
2989 | static void reloc_toc(void) | |
2990 | { | |
2991 | } | |
2992 | ||
2993 | static void unreloc_toc(void) | |
2994 | { | |
2995 | } | |
2996 | #else | |
1674400a | 2997 | static void __reloc_toc(unsigned long offset, unsigned long nr_entries) |
5ac47f7a AB |
2998 | { |
2999 | unsigned long i; | |
1674400a AB |
3000 | unsigned long *toc_entry; |
3001 | ||
3002 | /* Get the start of the TOC by using r2 directly. */ | |
3003 | asm volatile("addi %0,2,-0x8000" : "=b" (toc_entry)); | |
5ac47f7a AB |
3004 | |
3005 | for (i = 0; i < nr_entries; i++) { | |
3006 | *toc_entry = *toc_entry + offset; | |
3007 | toc_entry++; | |
3008 | } | |
3009 | } | |
3010 | ||
3011 | static void reloc_toc(void) | |
3012 | { | |
3013 | unsigned long offset = reloc_offset(); | |
3014 | unsigned long nr_entries = | |
3015 | (__prom_init_toc_end - __prom_init_toc_start) / sizeof(long); | |
3016 | ||
1674400a | 3017 | __reloc_toc(offset, nr_entries); |
5ac47f7a AB |
3018 | |
3019 | mb(); | |
3020 | } | |
3021 | ||
3022 | static void unreloc_toc(void) | |
3023 | { | |
3024 | unsigned long offset = reloc_offset(); | |
3025 | unsigned long nr_entries = | |
3026 | (__prom_init_toc_end - __prom_init_toc_start) / sizeof(long); | |
3027 | ||
3028 | mb(); | |
3029 | ||
1674400a | 3030 | __reloc_toc(-offset, nr_entries); |
5ac47f7a AB |
3031 | } |
3032 | #endif | |
3033 | #endif | |
27f44888 | 3034 | |
9b6b563c PM |
3035 | /* |
3036 | * We enter here early on, when the Open Firmware prom is still | |
3037 | * handling exceptions and the MMU hash table for us. | |
3038 | */ | |
3039 | ||
3040 | unsigned long __init prom_init(unsigned long r3, unsigned long r4, | |
3041 | unsigned long pp, | |
549e8152 PM |
3042 | unsigned long r6, unsigned long r7, |
3043 | unsigned long kbase) | |
9b6b563c | 3044 | { |
9b6b563c | 3045 | unsigned long hdr; |
9b6b563c PM |
3046 | |
3047 | #ifdef CONFIG_PPC32 | |
549e8152 | 3048 | unsigned long offset = reloc_offset(); |
9b6b563c | 3049 | reloc_got2(offset); |
5ac47f7a AB |
3050 | #else |
3051 | reloc_toc(); | |
9b6b563c PM |
3052 | #endif |
3053 | ||
9b6b563c PM |
3054 | /* |
3055 | * First zero the BSS | |
3056 | */ | |
5827d416 | 3057 | memset(&__bss_start, 0, __bss_stop - __bss_start); |
9b6b563c PM |
3058 | |
3059 | /* | |
3060 | * Init interface to Open Firmware, get some node references, | |
3061 | * like /chosen | |
3062 | */ | |
3063 | prom_init_client_services(pp); | |
3064 | ||
3065 | /* | |
a23414be PM |
3066 | * See if this OF is old enough that we need to do explicit maps |
3067 | * and other workarounds | |
9b6b563c | 3068 | */ |
a23414be | 3069 | prom_find_mmu(); |
9b6b563c | 3070 | |
a575b807 | 3071 | /* |
a23414be | 3072 | * Init prom stdout device |
a575b807 | 3073 | */ |
a23414be | 3074 | prom_init_stdout(); |
a575b807 | 3075 | |
5827d416 | 3076 | prom_printf("Preparing to boot %s", linux_banner); |
e7943fbb | 3077 | |
9b6b563c PM |
3078 | /* |
3079 | * Get default machine type. At this point, we do not differentiate | |
3080 | * between pSeries SMP and pSeries LPAR | |
3081 | */ | |
5827d416 AB |
3082 | of_platform = prom_find_machine_type(); |
3083 | prom_printf("Detected machine type: %x\n", of_platform); | |
9b6b563c | 3084 | |
0f890c8d | 3085 | #ifndef CONFIG_NONSTATIC_KERNEL |
add60ef3 OH |
3086 | /* Bail if this is a kdump kernel. */ |
3087 | if (PHYSICAL_START > 0) | |
3088 | prom_panic("Error: You can't boot a kdump kernel from OF!\n"); | |
549e8152 | 3089 | #endif |
add60ef3 OH |
3090 | |
3091 | /* | |
3092 | * Check for an initrd | |
3093 | */ | |
3094 | prom_check_initrd(r3, r4); | |
3095 | ||
12cc9fd6 SJS |
3096 | /* |
3097 | * Do early parsing of command line | |
3098 | */ | |
3099 | early_cmdline_parse(); | |
3100 | ||
11fdb309 | 3101 | #ifdef CONFIG_PPC_PSERIES |
9b6b563c PM |
3102 | /* |
3103 | * On pSeries, inform the firmware about our capabilities | |
3104 | */ | |
5827d416 AB |
3105 | if (of_platform == PLATFORM_PSERIES || |
3106 | of_platform == PLATFORM_PSERIES_LPAR) | |
9b6b563c PM |
3107 | prom_send_capabilities(); |
3108 | #endif | |
3109 | ||
9b6b563c | 3110 | /* |
f3f66f59 | 3111 | * Copy the CPU hold code |
9b6b563c | 3112 | */ |
5827d416 | 3113 | if (of_platform != PLATFORM_POWERMAC) |
549e8152 | 3114 | copy_and_flush(0, kbase, 0x100, 0); |
9b6b563c | 3115 | |
9b6b563c PM |
3116 | /* |
3117 | * Initialize memory management within prom_init | |
3118 | */ | |
3119 | prom_init_mem(); | |
3120 | ||
3121 | /* | |
3122 | * Determine which cpu is actually running right _now_ | |
3123 | */ | |
3124 | prom_find_boot_cpu(); | |
3125 | ||
3126 | /* | |
3127 | * Initialize display devices | |
3128 | */ | |
3129 | prom_check_displays(); | |
3130 | ||
493adffc | 3131 | #if defined(CONFIG_PPC64) && defined(__BIG_ENDIAN__) |
9b6b563c PM |
3132 | /* |
3133 | * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else | |
3134 | * that uses the allocator, we need to make sure we get the top of memory | |
3135 | * available for us here... | |
3136 | */ | |
5827d416 | 3137 | if (of_platform == PLATFORM_PSERIES) |
9b6b563c PM |
3138 | prom_initialize_tce_table(); |
3139 | #endif | |
3140 | ||
3141 | /* | |
27f44888 BH |
3142 | * On non-powermacs, try to instantiate RTAS. PowerMacs don't |
3143 | * have a usable RTAS implementation. | |
9b6b563c | 3144 | */ |
11fdb309 | 3145 | if (of_platform != PLATFORM_POWERMAC) |
9b6b563c | 3146 | prom_instantiate_rtas(); |
27f44888 | 3147 | |
4a727429 AL |
3148 | #ifdef CONFIG_PPC64 |
3149 | /* instantiate sml */ | |
3150 | prom_instantiate_sml(); | |
3151 | #endif | |
3152 | ||
27f44888 BH |
3153 | /* |
3154 | * On non-powermacs, put all CPUs in spin-loops. | |
3155 | * | |
3156 | * PowerMacs use a different mechanism to spin CPUs | |
dbe78b40 BH |
3157 | * |
3158 | * (This must be done after instanciating RTAS) | |
27f44888 | 3159 | */ |
11fdb309 | 3160 | if (of_platform != PLATFORM_POWERMAC) |
27f44888 | 3161 | prom_hold_cpus(); |
9b6b563c PM |
3162 | |
3163 | /* | |
3164 | * Fill in some infos for use by the kernel later on | |
3165 | */ | |
493adffc BH |
3166 | if (prom_memory_limit) { |
3167 | __be64 val = cpu_to_be64(prom_memory_limit); | |
5827d416 | 3168 | prom_setprop(prom.chosen, "/chosen", "linux,memory-limit", |
493adffc BH |
3169 | &val, sizeof(val)); |
3170 | } | |
9b6b563c | 3171 | #ifdef CONFIG_PPC64 |
5827d416 AB |
3172 | if (prom_iommu_off) |
3173 | prom_setprop(prom.chosen, "/chosen", "linux,iommu-off", | |
a23414be | 3174 | NULL, 0); |
9b6b563c | 3175 | |
5827d416 AB |
3176 | if (prom_iommu_force_on) |
3177 | prom_setprop(prom.chosen, "/chosen", "linux,iommu-force-on", | |
a23414be | 3178 | NULL, 0); |
9b6b563c | 3179 | |
5827d416 AB |
3180 | if (prom_tce_alloc_start) { |
3181 | prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-start", | |
3182 | &prom_tce_alloc_start, | |
9b6b563c | 3183 | sizeof(prom_tce_alloc_start)); |
5827d416 AB |
3184 | prom_setprop(prom.chosen, "/chosen", "linux,tce-alloc-end", |
3185 | &prom_tce_alloc_end, | |
9b6b563c PM |
3186 | sizeof(prom_tce_alloc_end)); |
3187 | } | |
3188 | #endif | |
3189 | ||
3190 | /* | |
3191 | * Fixup any known bugs in the device-tree | |
3192 | */ | |
3193 | fixup_device_tree(); | |
3194 | ||
3195 | /* | |
3196 | * Now finally create the flattened device-tree | |
3197 | */ | |
1f8737aa | 3198 | prom_printf("copying OF device tree...\n"); |
9b6b563c PM |
3199 | flatten_device_tree(); |
3200 | ||
3825ac0e PM |
3201 | /* |
3202 | * in case stdin is USB and still active on IBM machines... | |
3203 | * Unfortunately quiesce crashes on some powermacs if we have | |
11fdb309 | 3204 | * closed stdin already (in particular the powerbook 101). |
3825ac0e | 3205 | */ |
11fdb309 | 3206 | if (of_platform != PLATFORM_POWERMAC) |
3825ac0e | 3207 | prom_close_stdin(); |
9b6b563c PM |
3208 | |
3209 | /* | |
3210 | * Call OF "quiesce" method to shut down pending DMA's from | |
3211 | * devices etc... | |
3212 | */ | |
7e862d7e | 3213 | prom_printf("Quiescing Open Firmware ...\n"); |
9b6b563c PM |
3214 | call_prom("quiesce", 0, 0); |
3215 | ||
3216 | /* | |
3217 | * And finally, call the kernel passing it the flattened device | |
3218 | * tree and NULL as r5, thus triggering the new entry point which | |
3219 | * is common to us and kexec | |
3220 | */ | |
5827d416 | 3221 | hdr = dt_header_start; |
40dfef66 BH |
3222 | |
3223 | /* Don't print anything after quiesce under OPAL, it crashes OFW */ | |
11fdb309 BH |
3224 | prom_printf("Booting Linux via __start() @ 0x%lx ...\n", kbase); |
3225 | prom_debug("->dt_header_start=0x%lx\n", hdr); | |
9b6b563c PM |
3226 | |
3227 | #ifdef CONFIG_PPC32 | |
3228 | reloc_got2(-offset); | |
5ac47f7a AB |
3229 | #else |
3230 | unreloc_toc(); | |
9b6b563c PM |
3231 | #endif |
3232 | ||
6e35d5da | 3233 | __start(hdr, kbase, 0, 0, 0, 0, 0); |
9b6b563c PM |
3234 | |
3235 | return 0; | |
3236 | } |