1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Procedures for interfacing to Open Firmware. |
4 | * |
5 | * Paul Mackerras August 1996. |
6 | * Copyright (C) 1996-2005 Paul Mackerras. |
7 | * |
8 | * Adapted for 64bit PowerPC by Dave Engebretsen and Peter Bergner. |
9 | * {engebret|bergner}@us.ibm.com |
10 | */ |
11 | |
12 | #undef DEBUG_PROM |
13 | |
14 | /* we cannot use FORTIFY as it brings in new symbols */ |
15 | #define __NO_FORTIFY |
16 | |
17 | #include <linux/stdarg.h> |
18 | #include <linux/kernel.h> |
19 | #include <linux/string.h> |
20 | #include <linux/init.h> |
21 | #include <linux/threads.h> |
22 | #include <linux/spinlock.h> |
23 | #include <linux/types.h> |
24 | #include <linux/pci.h> |
25 | #include <linux/proc_fs.h> |
26 | #include <linux/delay.h> |
27 | #include <linux/initrd.h> |
28 | #include <linux/bitops.h> |
29 | #include <linux/pgtable.h> |
30 | #include <linux/printk.h> |
31 | #include <linux/of.h> |
32 | #include <linux/of_fdt.h> |
33 | #include <asm/prom.h> |
34 | #include <asm/rtas.h> |
35 | #include <asm/page.h> |
36 | #include <asm/processor.h> |
37 | #include <asm/interrupt.h> |
38 | #include <asm/irq.h> |
39 | #include <asm/io.h> |
40 | #include <asm/smp.h> |
41 | #include <asm/mmu.h> |
42 | #include <asm/iommu.h> |
43 | #include <asm/btext.h> |
44 | #include <asm/sections.h> |
45 | #include <asm/setup.h> |
46 | #include <asm/asm-prototypes.h> |
47 | #include <asm/ultravisor-api.h> |
48 | |
49 | #include <linux/linux_logo.h> |
50 | |
51 | /* All of prom_init bss lives here */ |
52 | #define __prombss __section(".bss.prominit") |
53 | |
54 | /* |
55 | * Eventually bump that one up |
56 | */ |
57 | #define DEVTREE_CHUNK_SIZE 0x100000 |
58 | |
59 | /* |
60 | * This is the size of the local memory reserve map that gets copied |
61 | * into the boot params passed to the kernel. That size is totally |
62 | * flexible as the kernel just reads the list until it encounters an |
63 | * entry with size 0, so it can be changed without breaking binary |
64 | * compatibility |
65 | */ |
66 | #define MEM_RESERVE_MAP_SIZE 8 |
67 | |
68 | /* |
69 | * prom_init() is called very early on, before the kernel text |
70 | * and data have been mapped to KERNELBASE. At this point the code |
71 | * is running at whatever address it has been loaded at. |
72 | * On ppc32 we compile with -mrelocatable, which means that references |
73 | * to extern and static variables get relocated automatically. |
74 | * ppc64 objects are always relocatable, we just need to relocate the |
75 | * TOC. |
76 | * |
77 | * Because OF may have mapped I/O devices into the area starting at |
78 | * KERNELBASE, particularly on CHRP machines, we can't safely call |
79 | * OF once the kernel has been mapped to KERNELBASE. Therefore all |
80 | * OF calls must be done within prom_init(). |
81 | * |
82 | * ADDR is used in calls to call_prom. The 4th and following |
83 | * arguments to call_prom should be 32-bit values. |
84 | * On ppc64, 64 bit values are truncated to 32 bits (and |
85 | * fortunately don't get interpreted as two arguments). |
86 | */ |
87 | #define ADDR(x) (u32)(unsigned long)(x) |
88 | |
89 | #ifdef CONFIG_PPC64 |
90 | #define OF_WORKAROUNDS 0 |
91 | #else |
92 | #define OF_WORKAROUNDS of_workarounds |
93 | static int of_workarounds __prombss; |
94 | #endif |
95 | |
96 | #define OF_WA_CLAIM 1 /* do phys/virt claim separately, then map */ |
97 | #define OF_WA_LONGTRAIL 2 /* work around longtrail bugs */ |
98 | |
99 | #ifdef DEBUG_PROM |
100 | #define prom_debug(x...) prom_printf(x) |
101 | #else |
102 | #define prom_debug(x...) do { } while (0) |
103 | #endif |
104 | |
105 | |
106 | typedef u32 prom_arg_t; |
107 | |
108 | struct prom_args { |
109 | __be32 service; |
110 | __be32 nargs; |
111 | __be32 nret; |
112 | __be32 args[10]; |
113 | }; |
114 | |
115 | struct prom_t { |
116 | ihandle root; |
117 | phandle chosen; |
118 | int cpu; |
119 | ihandle stdout; |
120 | ihandle mmumap; |
121 | ihandle memory; |
122 | }; |
123 | |
124 | struct mem_map_entry { |
125 | __be64 base; |
126 | __be64 size; |
127 | }; |
128 | |
129 | typedef __be32 cell_t; |
130 | |
131 | extern void __start(unsigned long r3, unsigned long r4, unsigned long r5, |
132 | unsigned long r6, unsigned long r7, unsigned long r8, |
133 | unsigned long r9); |
134 | |
135 | #ifdef CONFIG_PPC64 |
136 | extern int enter_prom(struct prom_args *args, unsigned long entry); |
137 | #else |
138 | static inline int enter_prom(struct prom_args *args, unsigned long entry) |
139 | { |
140 | return ((int (*)(struct prom_args *))entry)(args); |
141 | } |
142 | #endif |
143 | |
144 | extern void copy_and_flush(unsigned long dest, unsigned long src, |
145 | unsigned long size, unsigned long offset); |
146 | |
147 | /* prom structure */ |
148 | static struct prom_t __prombss prom; |
149 | |
150 | static unsigned long __prombss prom_entry; |
151 | |
152 | static char __prombss of_stdout_device[256]; |
153 | static char __prombss prom_scratch[256]; |
154 | |
155 | static unsigned long __prombss ; |
156 | static unsigned long __prombss dt_struct_start, dt_struct_end; |
157 | static unsigned long __prombss dt_string_start, dt_string_end; |
158 | |
159 | static unsigned long __prombss prom_initrd_start, prom_initrd_end; |
160 | |
161 | #ifdef CONFIG_PPC64 |
162 | static int __prombss prom_iommu_force_on; |
163 | static int __prombss prom_iommu_off; |
164 | static unsigned long __prombss prom_tce_alloc_start; |
165 | static unsigned long __prombss prom_tce_alloc_end; |
166 | #endif |
167 | |
168 | #ifdef CONFIG_PPC_PSERIES |
169 | static bool __prombss prom_radix_disable; |
170 | static bool __prombss prom_radix_gtse_disable; |
171 | static bool __prombss prom_xive_disable; |
172 | #endif |
173 | |
174 | #ifdef CONFIG_PPC_SVM |
175 | static bool __prombss prom_svm_enable; |
176 | #endif |
177 | |
178 | struct platform_support { |
179 | bool hash_mmu; |
180 | bool radix_mmu; |
181 | bool radix_gtse; |
182 | bool xive; |
183 | }; |
184 | |
185 | /* Platforms codes are now obsolete in the kernel. Now only used within this |
186 | * file and ultimately gone too. Feel free to change them if you need, they |
187 | * are not shared with anything outside of this file anymore |
188 | */ |
189 | #define PLATFORM_PSERIES 0x0100 |
190 | #define PLATFORM_PSERIES_LPAR 0x0101 |
191 | #define PLATFORM_LPAR 0x0001 |
192 | #define PLATFORM_POWERMAC 0x0400 |
193 | #define PLATFORM_GENERIC 0x0500 |
194 | |
195 | static int __prombss of_platform; |
196 | |
197 | static char __prombss prom_cmd_line[COMMAND_LINE_SIZE]; |
198 | |
199 | static unsigned long __prombss prom_memory_limit; |
200 | |
201 | static unsigned long __prombss alloc_top; |
202 | static unsigned long __prombss alloc_top_high; |
203 | static unsigned long __prombss alloc_bottom; |
204 | static unsigned long __prombss rmo_top; |
205 | static unsigned long __prombss ram_top; |
206 | |
207 | static struct mem_map_entry __prombss mem_reserve_map[MEM_RESERVE_MAP_SIZE]; |
208 | static int __prombss mem_reserve_cnt; |
209 | |
210 | static cell_t __prombss regbuf[1024]; |
211 | |
212 | static bool __prombss rtas_has_query_cpu_stopped; |
213 | |
214 | |
215 | /* |
216 | * Error results ... some OF calls will return "-1" on error, some |
217 | * will return 0, some will return either. To simplify, here are |
218 | * macros to use with any ihandle or phandle return value to check if |
219 | * it is valid |
220 | */ |
221 | |
222 | #define PROM_ERROR (-1u) |
223 | #define PHANDLE_VALID(p) ((p) != 0 && (p) != PROM_ERROR) |
224 | #define IHANDLE_VALID(i) ((i) != 0 && (i) != PROM_ERROR) |
225 | |
226 | /* Copied from lib/string.c and lib/kstrtox.c */ |
227 | |
228 | static int __init prom_strcmp(const char *cs, const char *ct) |
229 | { |
230 | unsigned char c1, c2; |
231 | |
232 | while (1) { |
233 | c1 = *cs++; |
234 | c2 = *ct++; |
235 | if (c1 != c2) |
236 | return c1 < c2 ? -1 : 1; |
237 | if (!c1) |
238 | break; |
239 | } |
240 | return 0; |
241 | } |
242 | |
243 | static ssize_t __init prom_strscpy_pad(char *dest, const char *src, size_t n) |
244 | { |
245 | ssize_t rc; |
246 | size_t i; |
247 | |
248 | if (n == 0 || n > INT_MAX) |
249 | return -E2BIG; |
250 | |
251 | // Copy up to n bytes |
252 | for (i = 0; i < n && src[i] != '\0'; i++) |
253 | dest[i] = src[i]; |
254 | |
255 | rc = i; |
256 | |
257 | // If we copied all n then we have run out of space for the nul |
258 | if (rc == n) { |
259 | // Rewind by one character to ensure nul termination |
260 | i--; |
261 | rc = -E2BIG; |
262 | } |
263 | |
264 | for (; i < n; i++) |
265 | dest[i] = '\0'; |
266 | |
267 | return rc; |
268 | } |
269 | |
270 | static int __init prom_strncmp(const char *cs, const char *ct, size_t count) |
271 | { |
272 | unsigned char c1, c2; |
273 | |
274 | while (count) { |
275 | c1 = *cs++; |
276 | c2 = *ct++; |
277 | if (c1 != c2) |
278 | return c1 < c2 ? -1 : 1; |
279 | if (!c1) |
280 | break; |
281 | count--; |
282 | } |
283 | return 0; |
284 | } |
285 | |
286 | static size_t __init prom_strlen(const char *s) |
287 | { |
288 | const char *sc; |
289 | |
290 | for (sc = s; *sc != '\0'; ++sc) |
291 | /* nothing */; |
292 | return sc - s; |
293 | } |
294 | |
295 | static int __init prom_memcmp(const void *cs, const void *ct, size_t count) |
296 | { |
297 | const unsigned char *su1, *su2; |
298 | int res = 0; |
299 | |
300 | for (su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--) |
301 | if ((res = *su1 - *su2) != 0) |
302 | break; |
303 | return res; |
304 | } |
305 | |
306 | static char __init *prom_strstr(const char *s1, const char *s2) |
307 | { |
308 | size_t l1, l2; |
309 | |
310 | l2 = prom_strlen(s: s2); |
311 | if (!l2) |
312 | return (char *)s1; |
313 | l1 = prom_strlen(s: s1); |
314 | while (l1 >= l2) { |
315 | l1--; |
316 | if (!prom_memcmp(cs: s1, ct: s2, count: l2)) |
317 | return (char *)s1; |
318 | s1++; |
319 | } |
320 | return NULL; |
321 | } |
322 | |
323 | static size_t __init prom_strlcat(char *dest, const char *src, size_t count) |
324 | { |
325 | size_t dsize = prom_strlen(s: dest); |
326 | size_t len = prom_strlen(s: src); |
327 | size_t res = dsize + len; |
328 | |
329 | /* This would be a bug */ |
330 | if (dsize >= count) |
331 | return count; |
332 | |
333 | dest += dsize; |
334 | count -= dsize; |
335 | if (len >= count) |
336 | len = count-1; |
337 | memcpy(dest, src, len); |
338 | dest[len] = 0; |
339 | return res; |
340 | |
341 | } |
342 | |
343 | #ifdef CONFIG_PPC_PSERIES |
344 | static int __init prom_strtobool(const char *s, bool *res) |
345 | { |
346 | if (!s) |
347 | return -EINVAL; |
348 | |
349 | switch (s[0]) { |
350 | case 'y': |
351 | case 'Y': |
352 | case '1': |
353 | *res = true; |
354 | return 0; |
355 | case 'n': |
356 | case 'N': |
357 | case '0': |
358 | *res = false; |
359 | return 0; |
360 | case 'o': |
361 | case 'O': |
362 | switch (s[1]) { |
363 | case 'n': |
364 | case 'N': |
365 | *res = true; |
366 | return 0; |
367 | case 'f': |
368 | case 'F': |
369 | *res = false; |
370 | return 0; |
371 | default: |
372 | break; |
373 | } |
374 | break; |
375 | default: |
376 | break; |
377 | } |
378 | |
379 | return -EINVAL; |
380 | } |
381 | #endif |
382 | |
383 | /* This is the one and *ONLY* place where we actually call open |
384 | * firmware. |
385 | */ |
386 | |
387 | static int __init call_prom(const char *service, int nargs, int nret, ...) |
388 | { |
389 | int i; |
390 | struct prom_args args; |
391 | va_list list; |
392 | |
393 | args.service = cpu_to_be32(ADDR(service)); |
394 | args.nargs = cpu_to_be32(nargs); |
395 | args.nret = cpu_to_be32(nret); |
396 | |
397 | va_start(list, nret); |
398 | for (i = 0; i < nargs; i++) |
399 | args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t)); |
400 | va_end(list); |
401 | |
402 | for (i = 0; i < nret; i++) |
403 | args.args[nargs+i] = 0; |
404 | |
405 | if (enter_prom(args: &args, entry: prom_entry) < 0) |
406 | return PROM_ERROR; |
407 | |
408 | return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0; |
409 | } |
410 | |
411 | static int __init call_prom_ret(const char *service, int nargs, int nret, |
412 | prom_arg_t *rets, ...) |
413 | { |
414 | int i; |
415 | struct prom_args args; |
416 | va_list list; |
417 | |
418 | args.service = cpu_to_be32(ADDR(service)); |
419 | args.nargs = cpu_to_be32(nargs); |
420 | args.nret = cpu_to_be32(nret); |
421 | |
422 | va_start(list, rets); |
423 | for (i = 0; i < nargs; i++) |
424 | args.args[i] = cpu_to_be32(va_arg(list, prom_arg_t)); |
425 | va_end(list); |
426 | |
427 | for (i = 0; i < nret; i++) |
428 | args.args[nargs+i] = 0; |
429 | |
430 | if (enter_prom(args: &args, entry: prom_entry) < 0) |
431 | return PROM_ERROR; |
432 | |
433 | if (rets != NULL) |
434 | for (i = 1; i < nret; ++i) |
435 | rets[i-1] = be32_to_cpu(args.args[nargs+i]); |
436 | |
437 | return (nret > 0) ? be32_to_cpu(args.args[nargs]) : 0; |
438 | } |
439 | |
440 | |
441 | static void __init prom_print(const char *msg) |
442 | { |
443 | const char *p, *q; |
444 | |
445 | if (prom.stdout == 0) |
446 | return; |
447 | |
448 | for (p = msg; *p != 0; p = q) { |
449 | for (q = p; *q != 0 && *q != '\n'; ++q) |
450 | ; |
451 | if (q > p) |
452 | call_prom(service: "write" , nargs: 3, nret: 1, prom.stdout, p, q - p); |
453 | if (*q == 0) |
454 | break; |
455 | ++q; |
456 | call_prom(service: "write" , nargs: 3, nret: 1, prom.stdout, ADDR("\r\n" ), 2); |
457 | } |
458 | } |
459 | |
460 | |
461 | /* |
462 | * Both prom_print_hex & prom_print_dec takes an unsigned long as input so that |
463 | * we do not need __udivdi3 or __umoddi3 on 32bits. |
464 | */ |
465 | static void __init prom_print_hex(unsigned long val) |
466 | { |
467 | int i, nibbles = sizeof(val)*2; |
468 | char buf[sizeof(val)*2+1]; |
469 | |
470 | for (i = nibbles-1; i >= 0; i--) { |
471 | buf[i] = (val & 0xf) + '0'; |
472 | if (buf[i] > '9') |
473 | buf[i] += ('a'-'0'-10); |
474 | val >>= 4; |
475 | } |
476 | buf[nibbles] = '\0'; |
477 | call_prom(service: "write" , nargs: 3, nret: 1, prom.stdout, buf, nibbles); |
478 | } |
479 | |
480 | /* max number of decimal digits in an unsigned long */ |
481 | #define UL_DIGITS 21 |
482 | static void __init prom_print_dec(unsigned long val) |
483 | { |
484 | int i, size; |
485 | char buf[UL_DIGITS+1]; |
486 | |
487 | for (i = UL_DIGITS-1; i >= 0; i--) { |
488 | buf[i] = (val % 10) + '0'; |
489 | val = val/10; |
490 | if (val == 0) |
491 | break; |
492 | } |
493 | /* shift stuff down */ |
494 | size = UL_DIGITS - i; |
495 | call_prom(service: "write" , nargs: 3, nret: 1, prom.stdout, buf+i, size); |
496 | } |
497 | |
498 | __printf(1, 2) |
499 | static void __init prom_printf(const char *format, ...) |
500 | { |
501 | const char *p, *q, *s; |
502 | va_list args; |
503 | unsigned long v; |
504 | long vs; |
505 | int n = 0; |
506 | |
507 | va_start(args, format); |
508 | for (p = format; *p != 0; p = q) { |
509 | for (q = p; *q != 0 && *q != '\n' && *q != '%'; ++q) |
510 | ; |
511 | if (q > p) |
512 | call_prom(service: "write" , nargs: 3, nret: 1, prom.stdout, p, q - p); |
513 | if (*q == 0) |
514 | break; |
515 | if (*q == '\n') { |
516 | ++q; |
517 | call_prom(service: "write" , nargs: 3, nret: 1, prom.stdout, |
518 | ADDR("\r\n" ), 2); |
519 | continue; |
520 | } |
521 | ++q; |
522 | if (*q == 0) |
523 | break; |
524 | while (*q == 'l') { |
525 | ++q; |
526 | ++n; |
527 | } |
528 | switch (*q) { |
529 | case 's': |
530 | ++q; |
531 | s = va_arg(args, const char *); |
532 | prom_print(msg: s); |
533 | break; |
534 | case 'x': |
535 | ++q; |
536 | switch (n) { |
537 | case 0: |
538 | v = va_arg(args, unsigned int); |
539 | break; |
540 | case 1: |
541 | v = va_arg(args, unsigned long); |
542 | break; |
543 | case 2: |
544 | default: |
545 | v = va_arg(args, unsigned long long); |
546 | break; |
547 | } |
548 | prom_print_hex(val: v); |
549 | break; |
550 | case 'u': |
551 | ++q; |
552 | switch (n) { |
553 | case 0: |
554 | v = va_arg(args, unsigned int); |
555 | break; |
556 | case 1: |
557 | v = va_arg(args, unsigned long); |
558 | break; |
559 | case 2: |
560 | default: |
561 | v = va_arg(args, unsigned long long); |
562 | break; |
563 | } |
564 | prom_print_dec(val: v); |
565 | break; |
566 | case 'd': |
567 | ++q; |
568 | switch (n) { |
569 | case 0: |
570 | vs = va_arg(args, int); |
571 | break; |
572 | case 1: |
573 | vs = va_arg(args, long); |
574 | break; |
575 | case 2: |
576 | default: |
577 | vs = va_arg(args, long long); |
578 | break; |
579 | } |
580 | if (vs < 0) { |
581 | prom_print(msg: "-" ); |
582 | vs = -vs; |
583 | } |
584 | prom_print_dec(val: vs); |
585 | break; |
586 | } |
587 | } |
588 | va_end(args); |
589 | } |
590 | |
591 | |
592 | static unsigned int __init prom_claim(unsigned long virt, unsigned long size, |
593 | unsigned long align) |
594 | { |
595 | |
596 | if (align == 0 && (OF_WORKAROUNDS & OF_WA_CLAIM)) { |
597 | /* |
598 | * Old OF requires we claim physical and virtual separately |
599 | * and then map explicitly (assuming virtual mode) |
600 | */ |
601 | int ret; |
602 | prom_arg_t result; |
603 | |
604 | ret = call_prom_ret(service: "call-method" , nargs: 5, nret: 2, rets: &result, |
605 | ADDR("claim" ), prom.memory, |
606 | align, size, virt); |
607 | if (ret != 0 || result == -1) |
608 | return -1; |
609 | ret = call_prom_ret(service: "call-method" , nargs: 5, nret: 2, rets: &result, |
610 | ADDR("claim" ), prom.mmumap, |
611 | align, size, virt); |
612 | if (ret != 0) { |
613 | call_prom(service: "call-method" , nargs: 4, nret: 1, ADDR("release" ), |
614 | prom.memory, size, virt); |
615 | return -1; |
616 | } |
617 | /* the 0x12 is M (coherence) + PP == read/write */ |
618 | call_prom(service: "call-method" , nargs: 6, nret: 1, |
619 | ADDR("map" ), prom.mmumap, 0x12, size, virt, virt); |
620 | return virt; |
621 | } |
622 | return call_prom(service: "claim" , nargs: 3, nret: 1, (prom_arg_t)virt, (prom_arg_t)size, |
623 | (prom_arg_t)align); |
624 | } |
625 | |
626 | static void __init __attribute__((noreturn)) prom_panic(const char *reason) |
627 | { |
628 | prom_print(msg: reason); |
629 | /* Do not call exit because it clears the screen on pmac |
630 | * it also causes some sort of double-fault on early pmacs */ |
631 | if (of_platform == PLATFORM_POWERMAC) |
632 | asm("trap\n" ); |
633 | |
634 | /* ToDo: should put up an SRC here on pSeries */ |
635 | call_prom(service: "exit" , nargs: 0, nret: 0); |
636 | |
637 | for (;;) /* should never get here */ |
638 | ; |
639 | } |
640 | |
641 | |
642 | static int __init prom_next_node(phandle *nodep) |
643 | { |
644 | phandle node; |
645 | |
646 | if ((node = *nodep) != 0 |
647 | && (*nodep = call_prom(service: "child" , nargs: 1, nret: 1, node)) != 0) |
648 | return 1; |
649 | if ((*nodep = call_prom(service: "peer" , nargs: 1, nret: 1, node)) != 0) |
650 | return 1; |
651 | for (;;) { |
652 | if ((node = call_prom(service: "parent" , nargs: 1, nret: 1, node)) == 0) |
653 | return 0; |
654 | if ((*nodep = call_prom(service: "peer" , nargs: 1, nret: 1, node)) != 0) |
655 | return 1; |
656 | } |
657 | } |
658 | |
659 | static inline int __init prom_getprop(phandle node, const char *pname, |
660 | void *value, size_t valuelen) |
661 | { |
662 | return call_prom(service: "getprop" , nargs: 4, nret: 1, node, ADDR(pname), |
663 | (u32)(unsigned long) value, (u32) valuelen); |
664 | } |
665 | |
666 | static inline int __init prom_getproplen(phandle node, const char *pname) |
667 | { |
668 | return call_prom(service: "getproplen" , nargs: 2, nret: 1, node, ADDR(pname)); |
669 | } |
670 | |
671 | static void __init add_string(char **str, const char *q) |
672 | { |
673 | char *p = *str; |
674 | |
675 | while (*q) |
676 | *p++ = *q++; |
677 | *p++ = ' '; |
678 | *str = p; |
679 | } |
680 | |
681 | static char *__init tohex(unsigned int x) |
682 | { |
683 | static const char digits[] __initconst = "0123456789abcdef" ; |
684 | static char result[9] __prombss; |
685 | int i; |
686 | |
687 | result[8] = 0; |
688 | i = 8; |
689 | do { |
690 | --i; |
691 | result[i] = digits[x & 0xf]; |
692 | x >>= 4; |
693 | } while (x != 0 && i > 0); |
694 | return &result[i]; |
695 | } |
696 | |
697 | static int __init prom_setprop(phandle node, const char *nodename, |
698 | const char *pname, void *value, size_t valuelen) |
699 | { |
700 | char cmd[256], *p; |
701 | |
702 | if (!(OF_WORKAROUNDS & OF_WA_LONGTRAIL)) |
703 | return call_prom(service: "setprop" , nargs: 4, nret: 1, node, ADDR(pname), |
704 | (u32)(unsigned long) value, (u32) valuelen); |
705 | |
706 | /* gah... setprop doesn't work on longtrail, have to use interpret */ |
707 | p = cmd; |
708 | add_string(str: &p, q: "dev" ); |
709 | add_string(str: &p, q: nodename); |
710 | add_string(str: &p, q: tohex(x: (u32)(unsigned long) value)); |
711 | add_string(str: &p, q: tohex(x: valuelen)); |
712 | add_string(str: &p, q: tohex(ADDR(pname))); |
713 | add_string(str: &p, q: tohex(x: prom_strlen(s: pname))); |
714 | add_string(str: &p, q: "property" ); |
715 | *p = 0; |
716 | return call_prom(service: "interpret" , nargs: 1, nret: 1, (u32)(unsigned long) cmd); |
717 | } |
718 | |
719 | /* We can't use the standard versions because of relocation headaches. */ |
720 | #define prom_isxdigit(c) \ |
721 | (('0' <= (c) && (c) <= '9') || ('a' <= (c) && (c) <= 'f') || ('A' <= (c) && (c) <= 'F')) |
722 | |
723 | #define prom_isdigit(c) ('0' <= (c) && (c) <= '9') |
724 | #define prom_islower(c) ('a' <= (c) && (c) <= 'z') |
725 | #define prom_toupper(c) (prom_islower(c) ? ((c) - 'a' + 'A') : (c)) |
726 | |
727 | static unsigned long __init prom_strtoul(const char *cp, const char **endp) |
728 | { |
729 | unsigned long result = 0, base = 10, value; |
730 | |
731 | if (*cp == '0') { |
732 | base = 8; |
733 | cp++; |
734 | if (prom_toupper(*cp) == 'X') { |
735 | cp++; |
736 | base = 16; |
737 | } |
738 | } |
739 | |
740 | while (prom_isxdigit(*cp) && |
741 | (value = prom_isdigit(*cp) ? *cp - '0' : prom_toupper(*cp) - 'A' + 10) < base) { |
742 | result = result * base + value; |
743 | cp++; |
744 | } |
745 | |
746 | if (endp) |
747 | *endp = cp; |
748 | |
749 | return result; |
750 | } |
751 | |
752 | static unsigned long __init prom_memparse(const char *ptr, const char **retptr) |
753 | { |
754 | unsigned long ret = prom_strtoul(cp: ptr, endp: retptr); |
755 | int shift = 0; |
756 | |
757 | /* |
758 | * We can't use a switch here because GCC *may* generate a |
759 | * jump table which won't work, because we're not running at |
760 | * the address we're linked at. |
761 | */ |
762 | if ('G' == **retptr || 'g' == **retptr) |
763 | shift = 30; |
764 | |
765 | if ('M' == **retptr || 'm' == **retptr) |
766 | shift = 20; |
767 | |
768 | if ('K' == **retptr || 'k' == **retptr) |
769 | shift = 10; |
770 | |
771 | if (shift) { |
772 | ret <<= shift; |
773 | (*retptr)++; |
774 | } |
775 | |
776 | return ret; |
777 | } |
778 | |
779 | /* |
780 | * Early parsing of the command line passed to the kernel, used for |
781 | * "mem=x" and the options that affect the iommu |
782 | */ |
783 | static void __init early_cmdline_parse(void) |
784 | { |
785 | const char *opt; |
786 | |
787 | char *p; |
788 | int l = 0; |
789 | |
790 | prom_cmd_line[0] = 0; |
791 | p = prom_cmd_line; |
792 | |
793 | if (!IS_ENABLED(CONFIG_CMDLINE_FORCE) && (long)prom.chosen > 0) |
794 | l = prom_getprop(node: prom.chosen, pname: "bootargs" , value: p, COMMAND_LINE_SIZE-1); |
795 | |
796 | if (IS_ENABLED(CONFIG_CMDLINE_EXTEND) || l <= 0 || p[0] == '\0') |
797 | prom_strlcat(dest: prom_cmd_line, src: " " CONFIG_CMDLINE, |
798 | count: sizeof(prom_cmd_line)); |
799 | |
800 | prom_printf(format: "command line: %s\n" , prom_cmd_line); |
801 | |
802 | #ifdef CONFIG_PPC64 |
803 | opt = prom_strstr(prom_cmd_line, "iommu=" ); |
804 | if (opt) { |
805 | prom_printf("iommu opt is: %s\n" , opt); |
806 | opt += 6; |
807 | while (*opt && *opt == ' ') |
808 | opt++; |
809 | if (!prom_strncmp(opt, "off" , 3)) |
810 | prom_iommu_off = 1; |
811 | else if (!prom_strncmp(opt, "force" , 5)) |
812 | prom_iommu_force_on = 1; |
813 | } |
814 | #endif |
815 | opt = prom_strstr(s1: prom_cmd_line, s2: "mem=" ); |
816 | if (opt) { |
817 | opt += 4; |
818 | prom_memory_limit = prom_memparse(ptr: opt, retptr: (const char **)&opt); |
819 | #ifdef CONFIG_PPC64 |
820 | /* Align to 16 MB == size of ppc64 large page */ |
821 | prom_memory_limit = ALIGN(prom_memory_limit, 0x1000000); |
822 | #endif |
823 | } |
824 | |
825 | #ifdef CONFIG_PPC_PSERIES |
826 | prom_radix_disable = !IS_ENABLED(CONFIG_PPC_RADIX_MMU_DEFAULT); |
827 | opt = prom_strstr(prom_cmd_line, "disable_radix" ); |
828 | if (opt) { |
829 | opt += 13; |
830 | if (*opt && *opt == '=') { |
831 | bool val; |
832 | |
833 | if (prom_strtobool(++opt, &val)) |
834 | prom_radix_disable = false; |
835 | else |
836 | prom_radix_disable = val; |
837 | } else |
838 | prom_radix_disable = true; |
839 | } |
840 | if (prom_radix_disable) |
841 | prom_debug("Radix disabled from cmdline\n" ); |
842 | |
843 | opt = prom_strstr(prom_cmd_line, "radix_hcall_invalidate=on" ); |
844 | if (opt) { |
845 | prom_radix_gtse_disable = true; |
846 | prom_debug("Radix GTSE disabled from cmdline\n" ); |
847 | } |
848 | |
849 | opt = prom_strstr(prom_cmd_line, "xive=off" ); |
850 | if (opt) { |
851 | prom_xive_disable = true; |
852 | prom_debug("XIVE disabled from cmdline\n" ); |
853 | } |
854 | #endif /* CONFIG_PPC_PSERIES */ |
855 | |
856 | #ifdef CONFIG_PPC_SVM |
857 | opt = prom_strstr(prom_cmd_line, "svm=" ); |
858 | if (opt) { |
859 | bool val; |
860 | |
861 | opt += sizeof("svm=" ) - 1; |
862 | if (!prom_strtobool(opt, &val)) |
863 | prom_svm_enable = val; |
864 | } |
865 | #endif /* CONFIG_PPC_SVM */ |
866 | } |
867 | |
868 | #ifdef CONFIG_PPC_PSERIES |
869 | /* |
870 | * The architecture vector has an array of PVR mask/value pairs, |
871 | * followed by # option vectors - 1, followed by the option vectors. |
872 | * |
873 | * See prom.h for the definition of the bits specified in the |
874 | * architecture vector. |
875 | */ |
876 | |
877 | /* Firmware expects the value to be n - 1, where n is the # of vectors */ |
878 | #define NUM_VECTORS(n) ((n) - 1) |
879 | |
880 | /* |
881 | * Firmware expects 1 + n - 2, where n is the length of the option vector in |
882 | * bytes. The 1 accounts for the length byte itself, the - 2 .. ? |
883 | */ |
884 | #define VECTOR_LENGTH(n) (1 + (n) - 2) |
885 | |
886 | struct option_vector1 { |
887 | u8 byte1; |
888 | u8 arch_versions; |
889 | u8 arch_versions3; |
890 | } __packed; |
891 | |
892 | struct option_vector2 { |
893 | u8 byte1; |
894 | __be16 reserved; |
895 | __be32 real_base; |
896 | __be32 real_size; |
897 | __be32 virt_base; |
898 | __be32 virt_size; |
899 | __be32 load_base; |
900 | __be32 min_rma; |
901 | __be32 min_load; |
902 | u8 min_rma_percent; |
903 | u8 max_pft_size; |
904 | } __packed; |
905 | |
906 | struct option_vector3 { |
907 | u8 byte1; |
908 | u8 byte2; |
909 | } __packed; |
910 | |
911 | struct option_vector4 { |
912 | u8 byte1; |
913 | u8 min_vp_cap; |
914 | } __packed; |
915 | |
916 | struct option_vector5 { |
917 | u8 byte1; |
918 | u8 byte2; |
919 | u8 byte3; |
920 | u8 cmo; |
921 | u8 associativity; |
922 | u8 bin_opts; |
923 | u8 micro_checkpoint; |
924 | u8 reserved0; |
925 | __be32 max_cpus; |
926 | __be16 papr_level; |
927 | __be16 reserved1; |
928 | u8 platform_facilities; |
929 | u8 reserved2; |
930 | __be16 reserved3; |
931 | u8 subprocessors; |
932 | u8 byte22; |
933 | u8 intarch; |
934 | u8 mmu; |
935 | u8 hash_ext; |
936 | u8 radix_ext; |
937 | } __packed; |
938 | |
939 | struct option_vector6 { |
940 | u8 reserved; |
941 | u8 secondary_pteg; |
942 | u8 os_name; |
943 | } __packed; |
944 | |
945 | struct option_vector7 { |
946 | u8 os_id[256]; |
947 | } __packed; |
948 | |
949 | struct ibm_arch_vec { |
950 | struct { __be32 mask, val; } pvrs[16]; |
951 | |
952 | u8 num_vectors; |
953 | |
954 | u8 vec1_len; |
955 | struct option_vector1 vec1; |
956 | |
957 | u8 vec2_len; |
958 | struct option_vector2 vec2; |
959 | |
960 | u8 vec3_len; |
961 | struct option_vector3 vec3; |
962 | |
963 | u8 vec4_len; |
964 | struct option_vector4 vec4; |
965 | |
966 | u8 vec5_len; |
967 | struct option_vector5 vec5; |
968 | |
969 | u8 vec6_len; |
970 | struct option_vector6 vec6; |
971 | |
972 | u8 vec7_len; |
973 | struct option_vector7 vec7; |
974 | } __packed; |
975 | |
976 | static const struct ibm_arch_vec ibm_architecture_vec_template __initconst = { |
977 | .pvrs = { |
978 | { |
979 | .mask = cpu_to_be32(0xfffe0000), /* POWER5/POWER5+ */ |
980 | .val = cpu_to_be32(0x003a0000), |
981 | }, |
982 | { |
983 | .mask = cpu_to_be32(0xffff0000), /* POWER6 */ |
984 | .val = cpu_to_be32(0x003e0000), |
985 | }, |
986 | { |
987 | .mask = cpu_to_be32(0xffff0000), /* POWER7 */ |
988 | .val = cpu_to_be32(0x003f0000), |
989 | }, |
990 | { |
991 | .mask = cpu_to_be32(0xffff0000), /* POWER8E */ |
992 | .val = cpu_to_be32(0x004b0000), |
993 | }, |
994 | { |
995 | .mask = cpu_to_be32(0xffff0000), /* POWER8NVL */ |
996 | .val = cpu_to_be32(0x004c0000), |
997 | }, |
998 | { |
999 | .mask = cpu_to_be32(0xffff0000), /* POWER8 */ |
1000 | .val = cpu_to_be32(0x004d0000), |
1001 | }, |
1002 | { |
1003 | .mask = cpu_to_be32(0xffff0000), /* POWER9 */ |
1004 | .val = cpu_to_be32(0x004e0000), |
1005 | }, |
1006 | { |
1007 | .mask = cpu_to_be32(0xffff0000), /* POWER10 */ |
1008 | .val = cpu_to_be32(0x00800000), |
1009 | }, |
1010 | { |
1011 | .mask = cpu_to_be32(0xffff0000), /* POWER11 */ |
1012 | .val = cpu_to_be32(0x00820000), |
1013 | }, |
1014 | { |
1015 | .mask = cpu_to_be32(0xffffffff), /* P11 compliant */ |
1016 | .val = cpu_to_be32(0x0f000007), |
1017 | }, |
1018 | { |
1019 | .mask = cpu_to_be32(0xffffffff), /* all 3.1-compliant */ |
1020 | .val = cpu_to_be32(0x0f000006), |
1021 | }, |
1022 | { |
1023 | .mask = cpu_to_be32(0xffffffff), /* all 3.00-compliant */ |
1024 | .val = cpu_to_be32(0x0f000005), |
1025 | }, |
1026 | { |
1027 | .mask = cpu_to_be32(0xffffffff), /* all 2.07-compliant */ |
1028 | .val = cpu_to_be32(0x0f000004), |
1029 | }, |
1030 | { |
1031 | .mask = cpu_to_be32(0xffffffff), /* all 2.06-compliant */ |
1032 | .val = cpu_to_be32(0x0f000003), |
1033 | }, |
1034 | { |
1035 | .mask = cpu_to_be32(0xffffffff), /* all 2.05-compliant */ |
1036 | .val = cpu_to_be32(0x0f000002), |
1037 | }, |
1038 | { |
1039 | .mask = cpu_to_be32(0xfffffffe), /* all 2.04-compliant and earlier */ |
1040 | .val = cpu_to_be32(0x0f000001), |
1041 | }, |
1042 | }, |
1043 | |
1044 | .num_vectors = NUM_VECTORS(6), |
1045 | |
1046 | .vec1_len = VECTOR_LENGTH(sizeof(struct option_vector1)), |
1047 | .vec1 = { |
1048 | .byte1 = 0, |
1049 | .arch_versions = OV1_PPC_2_00 | OV1_PPC_2_01 | OV1_PPC_2_02 | OV1_PPC_2_03 | |
1050 | OV1_PPC_2_04 | OV1_PPC_2_05 | OV1_PPC_2_06 | OV1_PPC_2_07, |
1051 | .arch_versions3 = OV1_PPC_3_00 | OV1_PPC_3_1, |
1052 | }, |
1053 | |
1054 | .vec2_len = VECTOR_LENGTH(sizeof(struct option_vector2)), |
1055 | /* option vector 2: Open Firmware options supported */ |
1056 | .vec2 = { |
1057 | .byte1 = OV2_REAL_MODE, |
1058 | .reserved = 0, |
1059 | .real_base = cpu_to_be32(0xffffffff), |
1060 | .real_size = cpu_to_be32(0xffffffff), |
1061 | .virt_base = cpu_to_be32(0xffffffff), |
1062 | .virt_size = cpu_to_be32(0xffffffff), |
1063 | .load_base = cpu_to_be32(0xffffffff), |
1064 | .min_rma = cpu_to_be32(512), /* 512MB min RMA */ |
1065 | .min_load = cpu_to_be32(0xffffffff), /* full client load */ |
1066 | .min_rma_percent = 0, /* min RMA percentage of total RAM */ |
1067 | .max_pft_size = 48, /* max log_2(hash table size) */ |
1068 | }, |
1069 | |
1070 | .vec3_len = VECTOR_LENGTH(sizeof(struct option_vector3)), |
1071 | /* option vector 3: processor options supported */ |
1072 | .vec3 = { |
1073 | .byte1 = 0, /* don't ignore, don't halt */ |
1074 | .byte2 = OV3_FP | OV3_VMX | OV3_DFP, |
1075 | }, |
1076 | |
1077 | .vec4_len = VECTOR_LENGTH(sizeof(struct option_vector4)), |
1078 | /* option vector 4: IBM PAPR implementation */ |
1079 | .vec4 = { |
1080 | .byte1 = 0, /* don't halt */ |
1081 | .min_vp_cap = OV4_MIN_ENT_CAP, /* minimum VP entitled capacity */ |
1082 | }, |
1083 | |
1084 | .vec5_len = VECTOR_LENGTH(sizeof(struct option_vector5)), |
1085 | /* option vector 5: PAPR/OF options */ |
1086 | .vec5 = { |
1087 | .byte1 = 0, /* don't ignore, don't halt */ |
1088 | .byte2 = OV5_FEAT(OV5_LPAR) | OV5_FEAT(OV5_SPLPAR) | OV5_FEAT(OV5_LARGE_PAGES) | |
1089 | OV5_FEAT(OV5_DRCONF_MEMORY) | OV5_FEAT(OV5_DONATE_DEDICATE_CPU) | |
1090 | #ifdef CONFIG_PCI_MSI |
1091 | /* PCIe/MSI support. Without MSI full PCIe is not supported */ |
1092 | OV5_FEAT(OV5_MSI), |
1093 | #else |
1094 | 0, |
1095 | #endif |
1096 | .byte3 = 0, |
1097 | .cmo = |
1098 | #ifdef CONFIG_PPC_SMLPAR |
1099 | OV5_FEAT(OV5_CMO) | OV5_FEAT(OV5_XCMO), |
1100 | #else |
1101 | 0, |
1102 | #endif |
1103 | .associativity = OV5_FEAT(OV5_FORM1_AFFINITY) | OV5_FEAT(OV5_PRRN) | |
1104 | OV5_FEAT(OV5_FORM2_AFFINITY), |
1105 | .bin_opts = OV5_FEAT(OV5_RESIZE_HPT) | OV5_FEAT(OV5_HP_EVT), |
1106 | .micro_checkpoint = 0, |
1107 | .reserved0 = 0, |
1108 | .max_cpus = cpu_to_be32(NR_CPUS), /* number of cores supported */ |
1109 | .papr_level = 0, |
1110 | .reserved1 = 0, |
1111 | .platform_facilities = OV5_FEAT(OV5_PFO_HW_RNG) | OV5_FEAT(OV5_PFO_HW_ENCR) | OV5_FEAT(OV5_PFO_HW_842), |
1112 | .reserved2 = 0, |
1113 | .reserved3 = 0, |
1114 | .subprocessors = 1, |
1115 | .byte22 = OV5_FEAT(OV5_DRMEM_V2) | OV5_FEAT(OV5_DRC_INFO), |
1116 | .intarch = 0, |
1117 | .mmu = 0, |
1118 | .hash_ext = 0, |
1119 | .radix_ext = 0, |
1120 | }, |
1121 | |
1122 | /* option vector 6: IBM PAPR hints */ |
1123 | .vec6_len = VECTOR_LENGTH(sizeof(struct option_vector6)), |
1124 | .vec6 = { |
1125 | .reserved = 0, |
1126 | .secondary_pteg = 0, |
1127 | .os_name = OV6_LINUX, |
1128 | }, |
1129 | |
1130 | /* option vector 7: OS Identification */ |
1131 | .vec7_len = VECTOR_LENGTH(sizeof(struct option_vector7)), |
1132 | }; |
1133 | |
1134 | static struct ibm_arch_vec __prombss ibm_architecture_vec ____cacheline_aligned; |
1135 | |
1136 | /* Old method - ELF header with PT_NOTE sections only works on BE */ |
1137 | #ifdef __BIG_ENDIAN__ |
1138 | static const struct fake_elf { |
1139 | Elf32_Ehdr elfhdr; |
1140 | Elf32_Phdr phdr[2]; |
1141 | struct chrpnote { |
1142 | u32 namesz; |
1143 | u32 descsz; |
1144 | u32 type; |
1145 | char name[8]; /* "PowerPC" */ |
1146 | struct chrpdesc { |
1147 | u32 real_mode; |
1148 | u32 real_base; |
1149 | u32 real_size; |
1150 | u32 virt_base; |
1151 | u32 virt_size; |
1152 | u32 load_base; |
1153 | } chrpdesc; |
1154 | } chrpnote; |
1155 | struct rpanote { |
1156 | u32 namesz; |
1157 | u32 descsz; |
1158 | u32 type; |
1159 | char name[24]; /* "IBM,RPA-Client-Config" */ |
1160 | struct rpadesc { |
1161 | u32 lpar_affinity; |
1162 | u32 min_rmo_size; |
1163 | u32 min_rmo_percent; |
1164 | u32 max_pft_size; |
1165 | u32 splpar; |
1166 | u32 min_load; |
1167 | u32 new_mem_def; |
1168 | u32 ignore_me; |
1169 | } rpadesc; |
1170 | } rpanote; |
1171 | } fake_elf __initconst = { |
1172 | .elfhdr = { |
1173 | .e_ident = { 0x7f, 'E', 'L', 'F', |
1174 | ELFCLASS32, ELFDATA2MSB, EV_CURRENT }, |
1175 | .e_type = ET_EXEC, /* yeah right */ |
1176 | .e_machine = EM_PPC, |
1177 | .e_version = EV_CURRENT, |
1178 | .e_phoff = offsetof(struct fake_elf, phdr), |
1179 | .e_phentsize = sizeof(Elf32_Phdr), |
1180 | .e_phnum = 2 |
1181 | }, |
1182 | .phdr = { |
1183 | [0] = { |
1184 | .p_type = PT_NOTE, |
1185 | .p_offset = offsetof(struct fake_elf, chrpnote), |
1186 | .p_filesz = sizeof(struct chrpnote) |
1187 | }, [1] = { |
1188 | .p_type = PT_NOTE, |
1189 | .p_offset = offsetof(struct fake_elf, rpanote), |
1190 | .p_filesz = sizeof(struct rpanote) |
1191 | } |
1192 | }, |
1193 | .chrpnote = { |
1194 | .namesz = sizeof("PowerPC" ), |
1195 | .descsz = sizeof(struct chrpdesc), |
1196 | .type = 0x1275, |
1197 | .name = "PowerPC" , |
1198 | .chrpdesc = { |
1199 | .real_mode = ~0U, /* ~0 means "don't care" */ |
1200 | .real_base = ~0U, |
1201 | .real_size = ~0U, |
1202 | .virt_base = ~0U, |
1203 | .virt_size = ~0U, |
1204 | .load_base = ~0U |
1205 | }, |
1206 | }, |
1207 | .rpanote = { |
1208 | .namesz = sizeof("IBM,RPA-Client-Config" ), |
1209 | .descsz = sizeof(struct rpadesc), |
1210 | .type = 0x12759999, |
1211 | .name = "IBM,RPA-Client-Config" , |
1212 | .rpadesc = { |
1213 | .lpar_affinity = 0, |
1214 | .min_rmo_size = 64, /* in megabytes */ |
1215 | .min_rmo_percent = 0, |
1216 | .max_pft_size = 48, /* 2^48 bytes max PFT size */ |
1217 | .splpar = 1, |
1218 | .min_load = ~0U, |
1219 | .new_mem_def = 0 |
1220 | } |
1221 | } |
1222 | }; |
1223 | #endif /* __BIG_ENDIAN__ */ |
1224 | |
1225 | static int __init prom_count_smt_threads(void) |
1226 | { |
1227 | phandle node; |
1228 | char type[64]; |
1229 | unsigned int plen; |
1230 | |
1231 | /* Pick up th first CPU node we can find */ |
1232 | for (node = 0; prom_next_node(&node); ) { |
1233 | type[0] = 0; |
1234 | prom_getprop(node, "device_type" , type, sizeof(type)); |
1235 | |
1236 | if (prom_strcmp(type, "cpu" )) |
1237 | continue; |
1238 | /* |
1239 | * There is an entry for each smt thread, each entry being |
1240 | * 4 bytes long. All cpus should have the same number of |
1241 | * smt threads, so return after finding the first. |
1242 | */ |
1243 | plen = prom_getproplen(node, "ibm,ppc-interrupt-server#s" ); |
1244 | if (plen == PROM_ERROR) |
1245 | break; |
1246 | plen >>= 2; |
1247 | prom_debug("Found %lu smt threads per core\n" , (unsigned long)plen); |
1248 | |
1249 | /* Sanity check */ |
1250 | if (plen < 1 || plen > 64) { |
1251 | prom_printf("Threads per core %lu out of bounds, assuming 1\n" , |
1252 | (unsigned long)plen); |
1253 | return 1; |
1254 | } |
1255 | return plen; |
1256 | } |
1257 | prom_debug("No threads found, assuming 1 per core\n" ); |
1258 | |
1259 | return 1; |
1260 | |
1261 | } |
1262 | |
1263 | static void __init prom_parse_mmu_model(u8 val, |
1264 | struct platform_support *support) |
1265 | { |
1266 | switch (val) { |
1267 | case OV5_FEAT(OV5_MMU_DYNAMIC): |
1268 | case OV5_FEAT(OV5_MMU_EITHER): /* Either Available */ |
1269 | prom_debug("MMU - either supported\n" ); |
1270 | support->radix_mmu = !prom_radix_disable; |
1271 | support->hash_mmu = true; |
1272 | break; |
1273 | case OV5_FEAT(OV5_MMU_RADIX): /* Only Radix */ |
1274 | prom_debug("MMU - radix only\n" ); |
1275 | if (prom_radix_disable) { |
1276 | /* |
1277 | * If we __have__ to do radix, we're better off ignoring |
1278 | * the command line rather than not booting. |
1279 | */ |
1280 | prom_printf("WARNING: Ignoring cmdline option disable_radix\n" ); |
1281 | } |
1282 | support->radix_mmu = true; |
1283 | break; |
1284 | case OV5_FEAT(OV5_MMU_HASH): |
1285 | prom_debug("MMU - hash only\n" ); |
1286 | support->hash_mmu = true; |
1287 | break; |
1288 | default: |
1289 | prom_debug("Unknown mmu support option: 0x%x\n" , val); |
1290 | break; |
1291 | } |
1292 | } |
1293 | |
1294 | static void __init prom_parse_xive_model(u8 val, |
1295 | struct platform_support *support) |
1296 | { |
1297 | switch (val) { |
1298 | case OV5_FEAT(OV5_XIVE_EITHER): /* Either Available */ |
1299 | prom_debug("XIVE - either mode supported\n" ); |
1300 | support->xive = !prom_xive_disable; |
1301 | break; |
1302 | case OV5_FEAT(OV5_XIVE_EXPLOIT): /* Only Exploitation mode */ |
1303 | prom_debug("XIVE - exploitation mode supported\n" ); |
1304 | if (prom_xive_disable) { |
1305 | /* |
1306 | * If we __have__ to do XIVE, we're better off ignoring |
1307 | * the command line rather than not booting. |
1308 | */ |
1309 | prom_printf("WARNING: Ignoring cmdline option xive=off\n" ); |
1310 | } |
1311 | support->xive = true; |
1312 | break; |
1313 | case OV5_FEAT(OV5_XIVE_LEGACY): /* Only Legacy mode */ |
1314 | prom_debug("XIVE - legacy mode supported\n" ); |
1315 | break; |
1316 | default: |
1317 | prom_debug("Unknown xive support option: 0x%x\n" , val); |
1318 | break; |
1319 | } |
1320 | } |
1321 | |
1322 | static void __init prom_parse_platform_support(u8 index, u8 val, |
1323 | struct platform_support *support) |
1324 | { |
1325 | switch (index) { |
1326 | case OV5_INDX(OV5_MMU_SUPPORT): /* MMU Model */ |
1327 | prom_parse_mmu_model(val & OV5_FEAT(OV5_MMU_SUPPORT), support); |
1328 | break; |
1329 | case OV5_INDX(OV5_RADIX_GTSE): /* Radix Extensions */ |
1330 | if (val & OV5_FEAT(OV5_RADIX_GTSE)) |
1331 | support->radix_gtse = !prom_radix_gtse_disable; |
1332 | break; |
1333 | case OV5_INDX(OV5_XIVE_SUPPORT): /* Interrupt mode */ |
1334 | prom_parse_xive_model(val & OV5_FEAT(OV5_XIVE_SUPPORT), |
1335 | support); |
1336 | break; |
1337 | } |
1338 | } |
1339 | |
1340 | static void __init prom_check_platform_support(void) |
1341 | { |
1342 | struct platform_support supported = { |
1343 | .hash_mmu = false, |
1344 | .radix_mmu = false, |
1345 | .radix_gtse = false, |
1346 | .xive = false |
1347 | }; |
1348 | int prop_len = prom_getproplen(prom.chosen, |
1349 | "ibm,arch-vec-5-platform-support" ); |
1350 | |
1351 | /* |
1352 | * First copy the architecture vec template |
1353 | * |
1354 | * use memcpy() instead of *vec = *vec_template so that GCC replaces it |
1355 | * by __memcpy() when KASAN is active |
1356 | */ |
1357 | memcpy(&ibm_architecture_vec, &ibm_architecture_vec_template, |
1358 | sizeof(ibm_architecture_vec)); |
1359 | |
1360 | prom_strscpy_pad(ibm_architecture_vec.vec7.os_id, linux_banner, 256); |
1361 | |
1362 | if (prop_len > 1) { |
1363 | int i; |
1364 | u8 vec[8]; |
1365 | prom_debug("Found ibm,arch-vec-5-platform-support, len: %d\n" , |
1366 | prop_len); |
1367 | if (prop_len > sizeof(vec)) |
1368 | prom_printf("WARNING: ibm,arch-vec-5-platform-support longer than expected (len: %d)\n" , |
1369 | prop_len); |
1370 | prom_getprop(prom.chosen, "ibm,arch-vec-5-platform-support" , &vec, sizeof(vec)); |
1371 | for (i = 0; i < prop_len; i += 2) { |
1372 | prom_debug("%d: index = 0x%x val = 0x%x\n" , i / 2, vec[i], vec[i + 1]); |
1373 | prom_parse_platform_support(vec[i], vec[i + 1], &supported); |
1374 | } |
1375 | } |
1376 | |
1377 | if (supported.radix_mmu && IS_ENABLED(CONFIG_PPC_RADIX_MMU)) { |
1378 | /* Radix preferred - Check if GTSE is also supported */ |
1379 | prom_debug("Asking for radix\n" ); |
1380 | ibm_architecture_vec.vec5.mmu = OV5_FEAT(OV5_MMU_RADIX); |
1381 | if (supported.radix_gtse) |
1382 | ibm_architecture_vec.vec5.radix_ext = |
1383 | OV5_FEAT(OV5_RADIX_GTSE); |
1384 | else |
1385 | prom_debug("Radix GTSE isn't supported\n" ); |
1386 | } else if (supported.hash_mmu) { |
1387 | /* Default to hash mmu (if we can) */ |
1388 | prom_debug("Asking for hash\n" ); |
1389 | ibm_architecture_vec.vec5.mmu = OV5_FEAT(OV5_MMU_HASH); |
1390 | } else { |
1391 | /* We're probably on a legacy hypervisor */ |
1392 | prom_debug("Assuming legacy hash support\n" ); |
1393 | } |
1394 | |
1395 | if (supported.xive) { |
1396 | prom_debug("Asking for XIVE\n" ); |
1397 | ibm_architecture_vec.vec5.intarch = OV5_FEAT(OV5_XIVE_EXPLOIT); |
1398 | } |
1399 | } |
1400 | |
1401 | static void __init prom_send_capabilities(void) |
1402 | { |
1403 | ihandle root; |
1404 | prom_arg_t ret; |
1405 | u32 cores; |
1406 | |
1407 | /* Check ibm,arch-vec-5-platform-support and fixup vec5 if required */ |
1408 | prom_check_platform_support(); |
1409 | |
1410 | root = call_prom("open" , 1, 1, ADDR("/" )); |
1411 | if (root != 0) { |
1412 | /* We need to tell the FW about the number of cores we support. |
1413 | * |
1414 | * To do that, we count the number of threads on the first core |
1415 | * (we assume this is the same for all cores) and use it to |
1416 | * divide NR_CPUS. |
1417 | */ |
1418 | |
1419 | cores = DIV_ROUND_UP(NR_CPUS, prom_count_smt_threads()); |
1420 | prom_printf("Max number of cores passed to firmware: %u (NR_CPUS = %d)\n" , |
1421 | cores, NR_CPUS); |
1422 | |
1423 | ibm_architecture_vec.vec5.max_cpus = cpu_to_be32(cores); |
1424 | |
1425 | /* try calling the ibm,client-architecture-support method */ |
1426 | prom_printf("Calling ibm,client-architecture-support..." ); |
1427 | if (call_prom_ret("call-method" , 3, 2, &ret, |
1428 | ADDR("ibm,client-architecture-support" ), |
1429 | root, |
1430 | ADDR(&ibm_architecture_vec)) == 0) { |
1431 | /* the call exists... */ |
1432 | if (ret) |
1433 | prom_printf("\nWARNING: ibm,client-architecture" |
1434 | "-support call FAILED!\n" ); |
1435 | call_prom("close" , 1, 0, root); |
1436 | prom_printf(" done\n" ); |
1437 | return; |
1438 | } |
1439 | call_prom("close" , 1, 0, root); |
1440 | prom_printf(" not implemented\n" ); |
1441 | } |
1442 | |
1443 | #ifdef __BIG_ENDIAN__ |
1444 | { |
1445 | ihandle elfloader; |
1446 | |
1447 | /* no ibm,client-architecture-support call, try the old way */ |
1448 | elfloader = call_prom("open" , 1, 1, |
1449 | ADDR("/packages/elf-loader" )); |
1450 | if (elfloader == 0) { |
1451 | prom_printf("couldn't open /packages/elf-loader\n" ); |
1452 | return; |
1453 | } |
1454 | call_prom("call-method" , 3, 1, ADDR("process-elf-header" ), |
1455 | elfloader, ADDR(&fake_elf)); |
1456 | call_prom("close" , 1, 0, elfloader); |
1457 | } |
1458 | #endif /* __BIG_ENDIAN__ */ |
1459 | } |
1460 | #endif /* CONFIG_PPC_PSERIES */ |
1461 | |
1462 | /* |
1463 | * Memory allocation strategy... our layout is normally: |
1464 | * |
1465 | * at 14Mb or more we have vmlinux, then a gap and initrd. In some |
1466 | * rare cases, initrd might end up being before the kernel though. |
1467 | * We assume this won't override the final kernel at 0, we have no |
1468 | * provision to handle that in this version, but it should hopefully |
1469 | * never happen. |
1470 | * |
1471 | * alloc_top is set to the top of RMO, eventually shrink down if the |
1472 | * TCEs overlap |
1473 | * |
1474 | * alloc_bottom is set to the top of kernel/initrd |
1475 | * |
1476 | * from there, allocations are done this way : rtas is allocated |
1477 | * topmost, and the device-tree is allocated from the bottom. We try |
1478 | * to grow the device-tree allocation as we progress. If we can't, |
1479 | * then we fail, we don't currently have a facility to restart |
1480 | * elsewhere, but that shouldn't be necessary. |
1481 | * |
1482 | * Note that calls to reserve_mem have to be done explicitly, memory |
1483 | * allocated with either alloc_up or alloc_down isn't automatically |
1484 | * reserved. |
1485 | */ |
1486 | |
1487 | |
1488 | /* |
1489 | * Allocates memory in the RMO upward from the kernel/initrd |
1490 | * |
1491 | * When align is 0, this is a special case, it means to allocate in place |
1492 | * at the current location of alloc_bottom or fail (that is basically |
1493 | * extending the previous allocation). Used for the device-tree flattening |
1494 | */ |
1495 | static unsigned long __init alloc_up(unsigned long size, unsigned long align) |
1496 | { |
1497 | unsigned long base = alloc_bottom; |
1498 | unsigned long addr = 0; |
1499 | |
1500 | if (align) |
1501 | base = ALIGN(base, align); |
1502 | prom_debug("%s(%lx, %lx)\n" , __func__, size, align); |
1503 | if (ram_top == 0) |
1504 | prom_panic(reason: "alloc_up() called with mem not initialized\n" ); |
1505 | |
1506 | if (align) |
1507 | base = ALIGN(alloc_bottom, align); |
1508 | else |
1509 | base = alloc_bottom; |
1510 | |
1511 | for(; (base + size) <= alloc_top; |
1512 | base = ALIGN(base + 0x100000, align)) { |
1513 | prom_debug(" trying: 0x%lx\n\r" , base); |
1514 | addr = (unsigned long)prom_claim(virt: base, size, align: 0); |
1515 | if (addr != PROM_ERROR && addr != 0) |
1516 | break; |
1517 | addr = 0; |
1518 | if (align == 0) |
1519 | break; |
1520 | } |
1521 | if (addr == 0) |
1522 | return 0; |
1523 | alloc_bottom = addr + size; |
1524 | |
1525 | prom_debug(" -> %lx\n" , addr); |
1526 | prom_debug(" alloc_bottom : %lx\n" , alloc_bottom); |
1527 | prom_debug(" alloc_top : %lx\n" , alloc_top); |
1528 | prom_debug(" alloc_top_hi : %lx\n" , alloc_top_high); |
1529 | prom_debug(" rmo_top : %lx\n" , rmo_top); |
1530 | prom_debug(" ram_top : %lx\n" , ram_top); |
1531 | |
1532 | return addr; |
1533 | } |
1534 | |
1535 | /* |
1536 | * Allocates memory downward, either from top of RMO, or if highmem |
1537 | * is set, from the top of RAM. Note that this one doesn't handle |
1538 | * failures. It does claim memory if highmem is not set. |
1539 | */ |
1540 | static unsigned long __init alloc_down(unsigned long size, unsigned long align, |
1541 | int highmem) |
1542 | { |
1543 | unsigned long base, addr = 0; |
1544 | |
1545 | prom_debug("%s(%lx, %lx, %s)\n" , __func__, size, align, |
1546 | highmem ? "(high)" : "(low)" ); |
1547 | if (ram_top == 0) |
1548 | prom_panic(reason: "alloc_down() called with mem not initialized\n" ); |
1549 | |
1550 | if (highmem) { |
1551 | /* Carve out storage for the TCE table. */ |
1552 | addr = ALIGN_DOWN(alloc_top_high - size, align); |
1553 | if (addr <= alloc_bottom) |
1554 | return 0; |
1555 | /* Will we bump into the RMO ? If yes, check out that we |
1556 | * didn't overlap existing allocations there, if we did, |
1557 | * we are dead, we must be the first in town ! |
1558 | */ |
1559 | if (addr < rmo_top) { |
1560 | /* Good, we are first */ |
1561 | if (alloc_top == rmo_top) |
1562 | alloc_top = rmo_top = addr; |
1563 | else |
1564 | return 0; |
1565 | } |
1566 | alloc_top_high = addr; |
1567 | goto bail; |
1568 | } |
1569 | |
1570 | base = ALIGN_DOWN(alloc_top - size, align); |
1571 | for (; base > alloc_bottom; |
1572 | base = ALIGN_DOWN(base - 0x100000, align)) { |
1573 | prom_debug(" trying: 0x%lx\n\r" , base); |
1574 | addr = (unsigned long)prom_claim(virt: base, size, align: 0); |
1575 | if (addr != PROM_ERROR && addr != 0) |
1576 | break; |
1577 | addr = 0; |
1578 | } |
1579 | if (addr == 0) |
1580 | return 0; |
1581 | alloc_top = addr; |
1582 | |
1583 | bail: |
1584 | prom_debug(" -> %lx\n" , addr); |
1585 | prom_debug(" alloc_bottom : %lx\n" , alloc_bottom); |
1586 | prom_debug(" alloc_top : %lx\n" , alloc_top); |
1587 | prom_debug(" alloc_top_hi : %lx\n" , alloc_top_high); |
1588 | prom_debug(" rmo_top : %lx\n" , rmo_top); |
1589 | prom_debug(" ram_top : %lx\n" , ram_top); |
1590 | |
1591 | return addr; |
1592 | } |
1593 | |
1594 | /* |
1595 | * Parse a "reg" cell |
1596 | */ |
1597 | static unsigned long __init prom_next_cell(int s, cell_t **cellp) |
1598 | { |
1599 | cell_t *p = *cellp; |
1600 | unsigned long r = 0; |
1601 | |
1602 | /* Ignore more than 2 cells */ |
1603 | while (s > sizeof(unsigned long) / 4) { |
1604 | p++; |
1605 | s--; |
1606 | } |
1607 | r = be32_to_cpu(*p++); |
1608 | #ifdef CONFIG_PPC64 |
1609 | if (s > 1) { |
1610 | r <<= 32; |
1611 | r |= be32_to_cpu(*(p++)); |
1612 | } |
1613 | #endif |
1614 | *cellp = p; |
1615 | return r; |
1616 | } |
1617 | |
1618 | /* |
1619 | * Very dumb function for adding to the memory reserve list, but |
1620 | * we don't need anything smarter at this point |
1621 | * |
1622 | * XXX Eventually check for collisions. They should NEVER happen. |
1623 | * If problems seem to show up, it would be a good start to track |
1624 | * them down. |
1625 | */ |
1626 | static void __init reserve_mem(u64 base, u64 size) |
1627 | { |
1628 | u64 top = base + size; |
1629 | unsigned long cnt = mem_reserve_cnt; |
1630 | |
1631 | if (size == 0) |
1632 | return; |
1633 | |
1634 | /* We need to always keep one empty entry so that we |
1635 | * have our terminator with "size" set to 0 since we are |
1636 | * dumb and just copy this entire array to the boot params |
1637 | */ |
1638 | base = ALIGN_DOWN(base, PAGE_SIZE); |
1639 | top = ALIGN(top, PAGE_SIZE); |
1640 | size = top - base; |
1641 | |
1642 | if (cnt >= (MEM_RESERVE_MAP_SIZE - 1)) |
1643 | prom_panic(reason: "Memory reserve map exhausted !\n" ); |
1644 | mem_reserve_map[cnt].base = cpu_to_be64(base); |
1645 | mem_reserve_map[cnt].size = cpu_to_be64(size); |
1646 | mem_reserve_cnt = cnt + 1; |
1647 | } |
1648 | |
1649 | /* |
1650 | * Initialize memory allocation mechanism, parse "memory" nodes and |
1651 | * obtain that way the top of memory and RMO to setup out local allocator |
1652 | */ |
1653 | static void __init prom_init_mem(void) |
1654 | { |
1655 | phandle node; |
1656 | char type[64]; |
1657 | unsigned int plen; |
1658 | cell_t *p, *endp; |
1659 | __be32 val; |
1660 | u32 rac, rsc; |
1661 | |
1662 | /* |
1663 | * We iterate the memory nodes to find |
1664 | * 1) top of RMO (first node) |
1665 | * 2) top of memory |
1666 | */ |
1667 | val = cpu_to_be32(2); |
1668 | prom_getprop(node: prom.root, pname: "#address-cells" , value: &val, valuelen: sizeof(val)); |
1669 | rac = be32_to_cpu(val); |
1670 | val = cpu_to_be32(1); |
1671 | prom_getprop(node: prom.root, pname: "#size-cells" , value: &val, valuelen: sizeof(rsc)); |
1672 | rsc = be32_to_cpu(val); |
1673 | prom_debug("root_addr_cells: %x\n" , rac); |
1674 | prom_debug("root_size_cells: %x\n" , rsc); |
1675 | |
1676 | prom_debug("scanning memory:\n" ); |
1677 | |
1678 | for (node = 0; prom_next_node(nodep: &node); ) { |
1679 | type[0] = 0; |
1680 | prom_getprop(node, pname: "device_type" , value: type, valuelen: sizeof(type)); |
1681 | |
1682 | if (type[0] == 0) { |
1683 | /* |
1684 | * CHRP Longtrail machines have no device_type |
1685 | * on the memory node, so check the name instead... |
1686 | */ |
1687 | prom_getprop(node, pname: "name" , value: type, valuelen: sizeof(type)); |
1688 | } |
1689 | if (prom_strcmp(cs: type, ct: "memory" )) |
1690 | continue; |
1691 | |
1692 | plen = prom_getprop(node, pname: "reg" , value: regbuf, valuelen: sizeof(regbuf)); |
1693 | if (plen > sizeof(regbuf)) { |
1694 | prom_printf(format: "memory node too large for buffer !\n" ); |
1695 | plen = sizeof(regbuf); |
1696 | } |
1697 | p = regbuf; |
1698 | endp = p + (plen / sizeof(cell_t)); |
1699 | |
1700 | #ifdef DEBUG_PROM |
1701 | memset(prom_scratch, 0, sizeof(prom_scratch)); |
1702 | call_prom("package-to-path" , 3, 1, node, prom_scratch, |
1703 | sizeof(prom_scratch) - 1); |
1704 | prom_debug(" node %s :\n" , prom_scratch); |
1705 | #endif /* DEBUG_PROM */ |
1706 | |
1707 | while ((endp - p) >= (rac + rsc)) { |
1708 | unsigned long base, size; |
1709 | |
1710 | base = prom_next_cell(s: rac, cellp: &p); |
1711 | size = prom_next_cell(s: rsc, cellp: &p); |
1712 | |
1713 | if (size == 0) |
1714 | continue; |
1715 | prom_debug(" %lx %lx\n" , base, size); |
1716 | if (base == 0 && (of_platform & PLATFORM_LPAR)) |
1717 | rmo_top = size; |
1718 | if ((base + size) > ram_top) |
1719 | ram_top = base + size; |
1720 | } |
1721 | } |
1722 | |
1723 | alloc_bottom = PAGE_ALIGN((unsigned long)&_end + 0x4000); |
1724 | |
1725 | /* |
1726 | * If prom_memory_limit is set we reduce the upper limits *except* for |
1727 | * alloc_top_high. This must be the real top of RAM so we can put |
1728 | * TCE's up there. |
1729 | */ |
1730 | |
1731 | alloc_top_high = ram_top; |
1732 | |
1733 | if (prom_memory_limit) { |
1734 | if (prom_memory_limit <= alloc_bottom) { |
1735 | prom_printf(format: "Ignoring mem=%lx <= alloc_bottom.\n" , |
1736 | prom_memory_limit); |
1737 | prom_memory_limit = 0; |
1738 | } else if (prom_memory_limit >= ram_top) { |
1739 | prom_printf(format: "Ignoring mem=%lx >= ram_top.\n" , |
1740 | prom_memory_limit); |
1741 | prom_memory_limit = 0; |
1742 | } else { |
1743 | ram_top = prom_memory_limit; |
1744 | rmo_top = min(rmo_top, prom_memory_limit); |
1745 | } |
1746 | } |
1747 | |
1748 | /* |
1749 | * Setup our top alloc point, that is top of RMO or top of |
1750 | * segment 0 when running non-LPAR. |
1751 | * Some RS64 machines have buggy firmware where claims up at |
1752 | * 1GB fail. Cap at 768MB as a workaround. |
1753 | * Since 768MB is plenty of room, and we need to cap to something |
1754 | * reasonable on 32-bit, cap at 768MB on all machines. |
1755 | */ |
1756 | if (!rmo_top) |
1757 | rmo_top = ram_top; |
1758 | rmo_top = min(0x30000000ul, rmo_top); |
1759 | alloc_top = rmo_top; |
1760 | alloc_top_high = ram_top; |
1761 | |
1762 | /* |
1763 | * Check if we have an initrd after the kernel but still inside |
1764 | * the RMO. If we do move our bottom point to after it. |
1765 | */ |
1766 | if (prom_initrd_start && |
1767 | prom_initrd_start < rmo_top && |
1768 | prom_initrd_end > alloc_bottom) |
1769 | alloc_bottom = PAGE_ALIGN(prom_initrd_end); |
1770 | |
1771 | prom_printf(format: "memory layout at init:\n" ); |
1772 | prom_printf(format: " memory_limit : %lx (16 MB aligned)\n" , |
1773 | prom_memory_limit); |
1774 | prom_printf(format: " alloc_bottom : %lx\n" , alloc_bottom); |
1775 | prom_printf(format: " alloc_top : %lx\n" , alloc_top); |
1776 | prom_printf(format: " alloc_top_hi : %lx\n" , alloc_top_high); |
1777 | prom_printf(format: " rmo_top : %lx\n" , rmo_top); |
1778 | prom_printf(format: " ram_top : %lx\n" , ram_top); |
1779 | } |
1780 | |
1781 | static void __init prom_close_stdin(void) |
1782 | { |
1783 | __be32 val; |
1784 | ihandle stdin; |
1785 | |
1786 | if (prom_getprop(node: prom.chosen, pname: "stdin" , value: &val, valuelen: sizeof(val)) > 0) { |
1787 | stdin = be32_to_cpu(val); |
1788 | call_prom(service: "close" , nargs: 1, nret: 0, stdin); |
1789 | } |
1790 | } |
1791 | |
1792 | #ifdef CONFIG_PPC_SVM |
1793 | static int __init prom_rtas_hcall(uint64_t args) |
1794 | { |
1795 | register uint64_t arg1 asm("r3" ) = H_RTAS; |
1796 | register uint64_t arg2 asm("r4" ) = args; |
1797 | |
1798 | asm volatile("sc 1\n" : "=r" (arg1) : |
1799 | "r" (arg1), |
1800 | "r" (arg2) :); |
1801 | srr_regs_clobbered(); |
1802 | |
1803 | return arg1; |
1804 | } |
1805 | |
1806 | static struct rtas_args __prombss os_term_args; |
1807 | |
1808 | static void __init prom_rtas_os_term(char *str) |
1809 | { |
1810 | phandle rtas_node; |
1811 | __be32 val; |
1812 | u32 token; |
1813 | |
1814 | prom_debug("%s: start...\n" , __func__); |
1815 | rtas_node = call_prom("finddevice" , 1, 1, ADDR("/rtas" )); |
1816 | prom_debug("rtas_node: %x\n" , rtas_node); |
1817 | if (!PHANDLE_VALID(rtas_node)) |
1818 | return; |
1819 | |
1820 | val = 0; |
1821 | prom_getprop(rtas_node, "ibm,os-term" , &val, sizeof(val)); |
1822 | token = be32_to_cpu(val); |
1823 | prom_debug("ibm,os-term: %x\n" , token); |
1824 | if (token == 0) |
1825 | prom_panic("Could not get token for ibm,os-term\n" ); |
1826 | os_term_args.token = cpu_to_be32(token); |
1827 | os_term_args.nargs = cpu_to_be32(1); |
1828 | os_term_args.nret = cpu_to_be32(1); |
1829 | os_term_args.args[0] = cpu_to_be32(__pa(str)); |
1830 | prom_rtas_hcall((uint64_t)&os_term_args); |
1831 | } |
1832 | #endif /* CONFIG_PPC_SVM */ |
1833 | |
1834 | /* |
1835 | * Allocate room for and instantiate RTAS |
1836 | */ |
1837 | static void __init prom_instantiate_rtas(void) |
1838 | { |
1839 | phandle rtas_node; |
1840 | ihandle rtas_inst; |
1841 | u32 base, entry = 0; |
1842 | __be32 val; |
1843 | u32 size = 0; |
1844 | |
1845 | prom_debug("prom_instantiate_rtas: start...\n" ); |
1846 | |
1847 | rtas_node = call_prom(service: "finddevice" , nargs: 1, nret: 1, ADDR("/rtas" )); |
1848 | prom_debug("rtas_node: %x\n" , rtas_node); |
1849 | if (!PHANDLE_VALID(rtas_node)) |
1850 | return; |
1851 | |
1852 | val = 0; |
1853 | prom_getprop(node: rtas_node, pname: "rtas-size" , value: &val, valuelen: sizeof(size)); |
1854 | size = be32_to_cpu(val); |
1855 | if (size == 0) |
1856 | return; |
1857 | |
1858 | base = alloc_down(size, PAGE_SIZE, highmem: 0); |
1859 | if (base == 0) |
1860 | prom_panic(reason: "Could not allocate memory for RTAS\n" ); |
1861 | |
1862 | rtas_inst = call_prom(service: "open" , nargs: 1, nret: 1, ADDR("/rtas" )); |
1863 | if (!IHANDLE_VALID(rtas_inst)) { |
1864 | prom_printf(format: "opening rtas package failed (%x)\n" , rtas_inst); |
1865 | return; |
1866 | } |
1867 | |
1868 | prom_printf(format: "instantiating rtas at 0x%x..." , base); |
1869 | |
1870 | if (call_prom_ret(service: "call-method" , nargs: 3, nret: 2, rets: &entry, |
1871 | ADDR("instantiate-rtas" ), |
1872 | rtas_inst, base) != 0 |
1873 | || entry == 0) { |
1874 | prom_printf(format: " failed\n" ); |
1875 | return; |
1876 | } |
1877 | prom_printf(format: " done\n" ); |
1878 | |
1879 | reserve_mem(base, size); |
1880 | |
1881 | val = cpu_to_be32(base); |
1882 | prom_setprop(node: rtas_node, nodename: "/rtas" , pname: "linux,rtas-base" , |
1883 | value: &val, valuelen: sizeof(val)); |
1884 | val = cpu_to_be32(entry); |
1885 | prom_setprop(node: rtas_node, nodename: "/rtas" , pname: "linux,rtas-entry" , |
1886 | value: &val, valuelen: sizeof(val)); |
1887 | |
1888 | /* Check if it supports "query-cpu-stopped-state" */ |
1889 | if (prom_getprop(node: rtas_node, pname: "query-cpu-stopped-state" , |
1890 | value: &val, valuelen: sizeof(val)) != PROM_ERROR) |
1891 | rtas_has_query_cpu_stopped = true; |
1892 | |
1893 | prom_debug("rtas base = 0x%x\n" , base); |
1894 | prom_debug("rtas entry = 0x%x\n" , entry); |
1895 | prom_debug("rtas size = 0x%x\n" , size); |
1896 | |
1897 | prom_debug("prom_instantiate_rtas: end...\n" ); |
1898 | } |
1899 | |
1900 | #ifdef CONFIG_PPC64 |
1901 | /* |
1902 | * Allocate room for and instantiate Stored Measurement Log (SML) |
1903 | */ |
1904 | static void __init prom_instantiate_sml(void) |
1905 | { |
1906 | phandle ibmvtpm_node; |
1907 | ihandle ibmvtpm_inst; |
1908 | u32 entry = 0, size = 0, succ = 0; |
1909 | u64 base; |
1910 | __be32 val; |
1911 | |
1912 | prom_debug("prom_instantiate_sml: start...\n" ); |
1913 | |
1914 | ibmvtpm_node = call_prom("finddevice" , 1, 1, ADDR("/vdevice/vtpm" )); |
1915 | prom_debug("ibmvtpm_node: %x\n" , ibmvtpm_node); |
1916 | if (!PHANDLE_VALID(ibmvtpm_node)) |
1917 | return; |
1918 | |
1919 | ibmvtpm_inst = call_prom("open" , 1, 1, ADDR("/vdevice/vtpm" )); |
1920 | if (!IHANDLE_VALID(ibmvtpm_inst)) { |
1921 | prom_printf("opening vtpm package failed (%x)\n" , ibmvtpm_inst); |
1922 | return; |
1923 | } |
1924 | |
1925 | if (prom_getprop(ibmvtpm_node, "ibm,sml-efi-reformat-supported" , |
1926 | &val, sizeof(val)) != PROM_ERROR) { |
1927 | if (call_prom_ret("call-method" , 2, 2, &succ, |
1928 | ADDR("reformat-sml-to-efi-alignment" ), |
1929 | ibmvtpm_inst) != 0 || succ == 0) { |
1930 | prom_printf("Reformat SML to EFI alignment failed\n" ); |
1931 | return; |
1932 | } |
1933 | |
1934 | if (call_prom_ret("call-method" , 2, 2, &size, |
1935 | ADDR("sml-get-allocated-size" ), |
1936 | ibmvtpm_inst) != 0 || size == 0) { |
1937 | prom_printf("SML get allocated size failed\n" ); |
1938 | return; |
1939 | } |
1940 | } else { |
1941 | if (call_prom_ret("call-method" , 2, 2, &size, |
1942 | ADDR("sml-get-handover-size" ), |
1943 | ibmvtpm_inst) != 0 || size == 0) { |
1944 | prom_printf("SML get handover size failed\n" ); |
1945 | return; |
1946 | } |
1947 | } |
1948 | |
1949 | base = alloc_down(size, PAGE_SIZE, 0); |
1950 | if (base == 0) |
1951 | prom_panic("Could not allocate memory for sml\n" ); |
1952 | |
1953 | prom_printf("instantiating sml at 0x%llx..." , base); |
1954 | |
1955 | memset((void *)base, 0, size); |
1956 | |
1957 | if (call_prom_ret("call-method" , 4, 2, &entry, |
1958 | ADDR("sml-handover" ), |
1959 | ibmvtpm_inst, size, base) != 0 || entry == 0) { |
1960 | prom_printf("SML handover failed\n" ); |
1961 | return; |
1962 | } |
1963 | prom_printf(" done\n" ); |
1964 | |
1965 | reserve_mem(base, size); |
1966 | |
1967 | prom_setprop(ibmvtpm_node, "/vdevice/vtpm" , "linux,sml-base" , |
1968 | &base, sizeof(base)); |
1969 | prom_setprop(ibmvtpm_node, "/vdevice/vtpm" , "linux,sml-size" , |
1970 | &size, sizeof(size)); |
1971 | |
1972 | prom_debug("sml base = 0x%llx\n" , base); |
1973 | prom_debug("sml size = 0x%x\n" , size); |
1974 | |
1975 | prom_debug("prom_instantiate_sml: end...\n" ); |
1976 | } |
1977 | |
1978 | /* |
1979 | * Allocate room for and initialize TCE tables |
1980 | */ |
1981 | #ifdef __BIG_ENDIAN__ |
1982 | static void __init prom_initialize_tce_table(void) |
1983 | { |
1984 | phandle node; |
1985 | ihandle phb_node; |
1986 | char compatible[64], type[64], model[64]; |
1987 | char *path = prom_scratch; |
1988 | u64 base, align; |
1989 | u32 minalign, minsize; |
1990 | u64 tce_entry, *tce_entryp; |
1991 | u64 local_alloc_top, local_alloc_bottom; |
1992 | u64 i; |
1993 | |
1994 | if (prom_iommu_off) |
1995 | return; |
1996 | |
1997 | prom_debug("starting prom_initialize_tce_table\n" ); |
1998 | |
1999 | /* Cache current top of allocs so we reserve a single block */ |
2000 | local_alloc_top = alloc_top_high; |
2001 | local_alloc_bottom = local_alloc_top; |
2002 | |
2003 | /* Search all nodes looking for PHBs. */ |
2004 | for (node = 0; prom_next_node(&node); ) { |
2005 | compatible[0] = 0; |
2006 | type[0] = 0; |
2007 | model[0] = 0; |
2008 | prom_getprop(node, "compatible" , |
2009 | compatible, sizeof(compatible)); |
2010 | prom_getprop(node, "device_type" , type, sizeof(type)); |
2011 | prom_getprop(node, "model" , model, sizeof(model)); |
2012 | |
2013 | if ((type[0] == 0) || (prom_strstr(type, "pci" ) == NULL)) |
2014 | continue; |
2015 | |
2016 | /* Keep the old logic intact to avoid regression. */ |
2017 | if (compatible[0] != 0) { |
2018 | if ((prom_strstr(compatible, "python" ) == NULL) && |
2019 | (prom_strstr(compatible, "Speedwagon" ) == NULL) && |
2020 | (prom_strstr(compatible, "Winnipeg" ) == NULL)) |
2021 | continue; |
2022 | } else if (model[0] != 0) { |
2023 | if ((prom_strstr(model, "ython" ) == NULL) && |
2024 | (prom_strstr(model, "peedwagon" ) == NULL) && |
2025 | (prom_strstr(model, "innipeg" ) == NULL)) |
2026 | continue; |
2027 | } |
2028 | |
2029 | if (prom_getprop(node, "tce-table-minalign" , &minalign, |
2030 | sizeof(minalign)) == PROM_ERROR) |
2031 | minalign = 0; |
2032 | if (prom_getprop(node, "tce-table-minsize" , &minsize, |
2033 | sizeof(minsize)) == PROM_ERROR) |
2034 | minsize = 4UL << 20; |
2035 | |
2036 | /* |
2037 | * Even though we read what OF wants, we just set the table |
2038 | * size to 4 MB. This is enough to map 2GB of PCI DMA space. |
2039 | * By doing this, we avoid the pitfalls of trying to DMA to |
2040 | * MMIO space and the DMA alias hole. |
2041 | */ |
2042 | minsize = 4UL << 20; |
2043 | |
2044 | /* Align to the greater of the align or size */ |
2045 | align = max(minalign, minsize); |
2046 | base = alloc_down(minsize, align, 1); |
2047 | if (base == 0) |
2048 | prom_panic("ERROR, cannot find space for TCE table.\n" ); |
2049 | if (base < local_alloc_bottom) |
2050 | local_alloc_bottom = base; |
2051 | |
2052 | /* It seems OF doesn't null-terminate the path :-( */ |
2053 | memset(path, 0, sizeof(prom_scratch)); |
2054 | /* Call OF to setup the TCE hardware */ |
2055 | if (call_prom("package-to-path" , 3, 1, node, |
2056 | path, sizeof(prom_scratch) - 1) == PROM_ERROR) { |
2057 | prom_printf("package-to-path failed\n" ); |
2058 | } |
2059 | |
2060 | /* Save away the TCE table attributes for later use. */ |
2061 | prom_setprop(node, path, "linux,tce-base" , &base, sizeof(base)); |
2062 | prom_setprop(node, path, "linux,tce-size" , &minsize, sizeof(minsize)); |
2063 | |
2064 | prom_debug("TCE table: %s\n" , path); |
2065 | prom_debug("\tnode = 0x%x\n" , node); |
2066 | prom_debug("\tbase = 0x%llx\n" , base); |
2067 | prom_debug("\tsize = 0x%x\n" , minsize); |
2068 | |
2069 | /* Initialize the table to have a one-to-one mapping |
2070 | * over the allocated size. |
2071 | */ |
2072 | tce_entryp = (u64 *)base; |
2073 | for (i = 0; i < (minsize >> 3) ;tce_entryp++, i++) { |
2074 | tce_entry = (i << PAGE_SHIFT); |
2075 | tce_entry |= 0x3; |
2076 | *tce_entryp = tce_entry; |
2077 | } |
2078 | |
2079 | prom_printf("opening PHB %s" , path); |
2080 | phb_node = call_prom("open" , 1, 1, path); |
2081 | if (phb_node == 0) |
2082 | prom_printf("... failed\n" ); |
2083 | else |
2084 | prom_printf("... done\n" ); |
2085 | |
2086 | call_prom("call-method" , 6, 0, ADDR("set-64-bit-addressing" ), |
2087 | phb_node, -1, minsize, |
2088 | (u32) base, (u32) (base >> 32)); |
2089 | call_prom("close" , 1, 0, phb_node); |
2090 | } |
2091 | |
2092 | reserve_mem(local_alloc_bottom, local_alloc_top - local_alloc_bottom); |
2093 | |
2094 | /* These are only really needed if there is a memory limit in |
2095 | * effect, but we don't know so export them always. */ |
2096 | prom_tce_alloc_start = local_alloc_bottom; |
2097 | prom_tce_alloc_end = local_alloc_top; |
2098 | |
2099 | /* Flag the first invalid entry */ |
2100 | prom_debug("ending prom_initialize_tce_table\n" ); |
2101 | } |
2102 | #endif /* __BIG_ENDIAN__ */ |
2103 | #endif /* CONFIG_PPC64 */ |
2104 | |
2105 | /* |
2106 | * With CHRP SMP we need to use the OF to start the other processors. |
2107 | * We can't wait until smp_boot_cpus (the OF is trashed by then) |
2108 | * so we have to put the processors into a holding pattern controlled |
2109 | * by the kernel (not OF) before we destroy the OF. |
2110 | * |
2111 | * This uses a chunk of low memory, puts some holding pattern |
2112 | * code there and sends the other processors off to there until |
2113 | * smp_boot_cpus tells them to do something. The holding pattern |
2114 | * checks that address until its cpu # is there, when it is that |
2115 | * cpu jumps to __secondary_start(). smp_boot_cpus() takes care |
2116 | * of setting those values. |
2117 | * |
2118 | * We also use physical address 0x4 here to tell when a cpu |
2119 | * is in its holding pattern code. |
2120 | * |
2121 | * -- Cort |
2122 | */ |
2123 | /* |
2124 | * We want to reference the copy of __secondary_hold_* in the |
2125 | * 0 - 0x100 address range |
2126 | */ |
2127 | #define LOW_ADDR(x) (((unsigned long) &(x)) & 0xff) |
2128 | |
2129 | static void __init prom_hold_cpus(void) |
2130 | { |
2131 | unsigned long i; |
2132 | phandle node; |
2133 | char type[64]; |
2134 | unsigned long *spinloop |
2135 | = (void *) LOW_ADDR(__secondary_hold_spinloop); |
2136 | unsigned long *acknowledge |
2137 | = (void *) LOW_ADDR(__secondary_hold_acknowledge); |
2138 | unsigned long secondary_hold = LOW_ADDR(__secondary_hold); |
2139 | |
2140 | /* |
2141 | * On pseries, if RTAS supports "query-cpu-stopped-state", |
2142 | * we skip this stage, the CPUs will be started by the |
2143 | * kernel using RTAS. |
2144 | */ |
2145 | if ((of_platform == PLATFORM_PSERIES || |
2146 | of_platform == PLATFORM_PSERIES_LPAR) && |
2147 | rtas_has_query_cpu_stopped) { |
2148 | prom_printf(format: "prom_hold_cpus: skipped\n" ); |
2149 | return; |
2150 | } |
2151 | |
2152 | prom_debug("prom_hold_cpus: start...\n" ); |
2153 | prom_debug(" 1) spinloop = 0x%lx\n" , (unsigned long)spinloop); |
2154 | prom_debug(" 1) *spinloop = 0x%lx\n" , *spinloop); |
2155 | prom_debug(" 1) acknowledge = 0x%lx\n" , |
2156 | (unsigned long)acknowledge); |
2157 | prom_debug(" 1) *acknowledge = 0x%lx\n" , *acknowledge); |
2158 | prom_debug(" 1) secondary_hold = 0x%lx\n" , secondary_hold); |
2159 | |
2160 | /* Set the common spinloop variable, so all of the secondary cpus |
2161 | * will block when they are awakened from their OF spinloop. |
2162 | * This must occur for both SMP and non SMP kernels, since OF will |
2163 | * be trashed when we move the kernel. |
2164 | */ |
2165 | *spinloop = 0; |
2166 | |
2167 | /* look for cpus */ |
2168 | for (node = 0; prom_next_node(nodep: &node); ) { |
2169 | unsigned int cpu_no; |
2170 | __be32 reg; |
2171 | |
2172 | type[0] = 0; |
2173 | prom_getprop(node, pname: "device_type" , value: type, valuelen: sizeof(type)); |
2174 | if (prom_strcmp(cs: type, ct: "cpu" ) != 0) |
2175 | continue; |
2176 | |
2177 | /* Skip non-configured cpus. */ |
2178 | if (prom_getprop(node, pname: "status" , value: type, valuelen: sizeof(type)) > 0) |
2179 | if (prom_strcmp(cs: type, ct: "okay" ) != 0) |
2180 | continue; |
2181 | |
2182 | reg = cpu_to_be32(-1); /* make sparse happy */ |
2183 | prom_getprop(node, pname: "reg" , value: ®, valuelen: sizeof(reg)); |
2184 | cpu_no = be32_to_cpu(reg); |
2185 | |
2186 | prom_debug("cpu hw idx = %u\n" , cpu_no); |
2187 | |
2188 | /* Init the acknowledge var which will be reset by |
2189 | * the secondary cpu when it awakens from its OF |
2190 | * spinloop. |
2191 | */ |
2192 | *acknowledge = (unsigned long)-1; |
2193 | |
2194 | if (cpu_no != prom.cpu) { |
2195 | /* Primary Thread of non-boot cpu or any thread */ |
2196 | prom_printf(format: "starting cpu hw idx %u... " , cpu_no); |
2197 | call_prom(service: "start-cpu" , nargs: 3, nret: 0, node, |
2198 | secondary_hold, cpu_no); |
2199 | |
2200 | for (i = 0; (i < 100000000) && |
2201 | (*acknowledge == ((unsigned long)-1)); i++ ) |
2202 | mb(); |
2203 | |
2204 | if (*acknowledge == cpu_no) |
2205 | prom_printf(format: "done\n" ); |
2206 | else |
2207 | prom_printf(format: "failed: %lx\n" , *acknowledge); |
2208 | } |
2209 | #ifdef CONFIG_SMP |
2210 | else |
2211 | prom_printf(format: "boot cpu hw idx %u\n" , cpu_no); |
2212 | #endif /* CONFIG_SMP */ |
2213 | } |
2214 | |
2215 | prom_debug("prom_hold_cpus: end...\n" ); |
2216 | } |
2217 | |
2218 | |
2219 | static void __init prom_init_client_services(unsigned long pp) |
2220 | { |
2221 | /* Get a handle to the prom entry point before anything else */ |
2222 | prom_entry = pp; |
2223 | |
2224 | /* get a handle for the stdout device */ |
2225 | prom.chosen = call_prom(service: "finddevice" , nargs: 1, nret: 1, ADDR("/chosen" )); |
2226 | if (!PHANDLE_VALID(prom.chosen)) |
2227 | prom_panic(reason: "cannot find chosen" ); /* msg won't be printed :( */ |
2228 | |
2229 | /* get device tree root */ |
2230 | prom.root = call_prom(service: "finddevice" , nargs: 1, nret: 1, ADDR("/" )); |
2231 | if (!PHANDLE_VALID(prom.root)) |
2232 | prom_panic(reason: "cannot find device tree root" ); /* msg won't be printed :( */ |
2233 | |
2234 | prom.mmumap = 0; |
2235 | } |
2236 | |
2237 | #ifdef CONFIG_PPC32 |
2238 | /* |
2239 | * For really old powermacs, we need to map things we claim. |
2240 | * For that, we need the ihandle of the mmu. |
2241 | * Also, on the longtrail, we need to work around other bugs. |
2242 | */ |
2243 | static void __init prom_find_mmu(void) |
2244 | { |
2245 | phandle oprom; |
2246 | char version[64]; |
2247 | |
2248 | oprom = call_prom("finddevice" , 1, 1, ADDR("/openprom" )); |
2249 | if (!PHANDLE_VALID(oprom)) |
2250 | return; |
2251 | if (prom_getprop(oprom, "model" , version, sizeof(version)) <= 0) |
2252 | return; |
2253 | version[sizeof(version) - 1] = 0; |
2254 | /* XXX might need to add other versions here */ |
2255 | if (prom_strcmp(version, "Open Firmware, 1.0.5" ) == 0) |
2256 | of_workarounds = OF_WA_CLAIM; |
2257 | else if (prom_strncmp(version, "FirmWorks,3." , 12) == 0) { |
2258 | of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL; |
2259 | call_prom("interpret" , 1, 1, "dev /memory 0 to allow-reclaim" ); |
2260 | } else |
2261 | return; |
2262 | prom.memory = call_prom("open" , 1, 1, ADDR("/memory" )); |
2263 | prom_getprop(prom.chosen, "mmu" , &prom.mmumap, |
2264 | sizeof(prom.mmumap)); |
2265 | prom.mmumap = be32_to_cpu(prom.mmumap); |
2266 | if (!IHANDLE_VALID(prom.memory) || !IHANDLE_VALID(prom.mmumap)) |
2267 | of_workarounds &= ~OF_WA_CLAIM; /* hmmm */ |
2268 | } |
2269 | #else |
2270 | #define prom_find_mmu() |
2271 | #endif |
2272 | |
2273 | static void __init prom_init_stdout(void) |
2274 | { |
2275 | char *path = of_stdout_device; |
2276 | char type[16]; |
2277 | phandle stdout_node; |
2278 | __be32 val; |
2279 | |
2280 | if (prom_getprop(node: prom.chosen, pname: "stdout" , value: &val, valuelen: sizeof(val)) <= 0) |
2281 | prom_panic(reason: "cannot find stdout" ); |
2282 | |
2283 | prom.stdout = be32_to_cpu(val); |
2284 | |
2285 | /* Get the full OF pathname of the stdout device */ |
2286 | memset(path, 0, 256); |
2287 | call_prom(service: "instance-to-path" , nargs: 3, nret: 1, prom.stdout, path, 255); |
2288 | prom_printf(format: "OF stdout device is: %s\n" , of_stdout_device); |
2289 | prom_setprop(node: prom.chosen, nodename: "/chosen" , pname: "linux,stdout-path" , |
2290 | value: path, valuelen: prom_strlen(s: path) + 1); |
2291 | |
2292 | /* instance-to-package fails on PA-Semi */ |
2293 | stdout_node = call_prom(service: "instance-to-package" , nargs: 1, nret: 1, prom.stdout); |
2294 | if (stdout_node != PROM_ERROR) { |
2295 | val = cpu_to_be32(stdout_node); |
2296 | |
2297 | /* If it's a display, note it */ |
2298 | memset(type, 0, sizeof(type)); |
2299 | prom_getprop(node: stdout_node, pname: "device_type" , value: type, valuelen: sizeof(type)); |
2300 | if (prom_strcmp(cs: type, ct: "display" ) == 0) |
2301 | prom_setprop(node: stdout_node, nodename: path, pname: "linux,boot-display" , NULL, valuelen: 0); |
2302 | } |
2303 | } |
2304 | |
2305 | static int __init prom_find_machine_type(void) |
2306 | { |
2307 | static char compat[256] __prombss; |
2308 | int len, i = 0; |
2309 | #ifdef CONFIG_PPC64 |
2310 | phandle rtas; |
2311 | int x; |
2312 | #endif |
2313 | |
2314 | /* Look for a PowerMac or a Cell */ |
2315 | len = prom_getprop(node: prom.root, pname: "compatible" , |
2316 | value: compat, valuelen: sizeof(compat)-1); |
2317 | if (len > 0) { |
2318 | compat[len] = 0; |
2319 | while (i < len) { |
2320 | char *p = &compat[i]; |
2321 | int sl = prom_strlen(s: p); |
2322 | if (sl == 0) |
2323 | break; |
2324 | if (prom_strstr(s1: p, s2: "Power Macintosh" ) || |
2325 | prom_strstr(s1: p, s2: "MacRISC" )) |
2326 | return PLATFORM_POWERMAC; |
2327 | #ifdef CONFIG_PPC64 |
2328 | /* We must make sure we don't detect the IBM Cell |
2329 | * blades as pSeries due to some firmware issues, |
2330 | * so we do it here. |
2331 | */ |
2332 | if (prom_strstr(p, "IBM,CBEA" ) || |
2333 | prom_strstr(p, "IBM,CPBW-1.0" )) |
2334 | return PLATFORM_GENERIC; |
2335 | #endif /* CONFIG_PPC64 */ |
2336 | i += sl + 1; |
2337 | } |
2338 | } |
2339 | #ifdef CONFIG_PPC64 |
2340 | /* Try to figure out if it's an IBM pSeries or any other |
2341 | * PAPR compliant platform. We assume it is if : |
2342 | * - /device_type is "chrp" (please, do NOT use that for future |
2343 | * non-IBM designs ! |
2344 | * - it has /rtas |
2345 | */ |
2346 | len = prom_getprop(prom.root, "device_type" , |
2347 | compat, sizeof(compat)-1); |
2348 | if (len <= 0) |
2349 | return PLATFORM_GENERIC; |
2350 | if (prom_strcmp(compat, "chrp" )) |
2351 | return PLATFORM_GENERIC; |
2352 | |
2353 | /* Default to pSeries. We need to know if we are running LPAR */ |
2354 | rtas = call_prom("finddevice" , 1, 1, ADDR("/rtas" )); |
2355 | if (!PHANDLE_VALID(rtas)) |
2356 | return PLATFORM_GENERIC; |
2357 | x = prom_getproplen(rtas, "ibm,hypertas-functions" ); |
2358 | if (x != PROM_ERROR) { |
2359 | prom_debug("Hypertas detected, assuming LPAR !\n" ); |
2360 | return PLATFORM_PSERIES_LPAR; |
2361 | } |
2362 | return PLATFORM_PSERIES; |
2363 | #else |
2364 | return PLATFORM_GENERIC; |
2365 | #endif |
2366 | } |
2367 | |
2368 | static int __init prom_set_color(ihandle ih, int i, int r, int g, int b) |
2369 | { |
2370 | return call_prom(service: "call-method" , nargs: 6, nret: 1, ADDR("color!" ), ih, i, b, g, r); |
2371 | } |
2372 | |
2373 | /* |
2374 | * If we have a display that we don't know how to drive, |
2375 | * we will want to try to execute OF's open method for it |
2376 | * later. However, OF will probably fall over if we do that |
2377 | * we've taken over the MMU. |
2378 | * So we check whether we will need to open the display, |
2379 | * and if so, open it now. |
2380 | */ |
2381 | static void __init prom_check_displays(void) |
2382 | { |
2383 | char type[16], *path; |
2384 | phandle node; |
2385 | ihandle ih; |
2386 | int i; |
2387 | |
2388 | static const unsigned char default_colors[] __initconst = { |
2389 | 0x00, 0x00, 0x00, |
2390 | 0x00, 0x00, 0xaa, |
2391 | 0x00, 0xaa, 0x00, |
2392 | 0x00, 0xaa, 0xaa, |
2393 | 0xaa, 0x00, 0x00, |
2394 | 0xaa, 0x00, 0xaa, |
2395 | 0xaa, 0xaa, 0x00, |
2396 | 0xaa, 0xaa, 0xaa, |
2397 | 0x55, 0x55, 0x55, |
2398 | 0x55, 0x55, 0xff, |
2399 | 0x55, 0xff, 0x55, |
2400 | 0x55, 0xff, 0xff, |
2401 | 0xff, 0x55, 0x55, |
2402 | 0xff, 0x55, 0xff, |
2403 | 0xff, 0xff, 0x55, |
2404 | 0xff, 0xff, 0xff |
2405 | }; |
2406 | const unsigned char *clut; |
2407 | |
2408 | prom_debug("Looking for displays\n" ); |
2409 | for (node = 0; prom_next_node(nodep: &node); ) { |
2410 | memset(type, 0, sizeof(type)); |
2411 | prom_getprop(node, pname: "device_type" , value: type, valuelen: sizeof(type)); |
2412 | if (prom_strcmp(cs: type, ct: "display" ) != 0) |
2413 | continue; |
2414 | |
2415 | /* It seems OF doesn't null-terminate the path :-( */ |
2416 | path = prom_scratch; |
2417 | memset(path, 0, sizeof(prom_scratch)); |
2418 | |
2419 | /* |
2420 | * leave some room at the end of the path for appending extra |
2421 | * arguments |
2422 | */ |
2423 | if (call_prom(service: "package-to-path" , nargs: 3, nret: 1, node, path, |
2424 | sizeof(prom_scratch) - 10) == PROM_ERROR) |
2425 | continue; |
2426 | prom_printf(format: "found display : %s, opening... " , path); |
2427 | |
2428 | ih = call_prom(service: "open" , nargs: 1, nret: 1, path); |
2429 | if (ih == 0) { |
2430 | prom_printf(format: "failed\n" ); |
2431 | continue; |
2432 | } |
2433 | |
2434 | /* Success */ |
2435 | prom_printf(format: "done\n" ); |
2436 | prom_setprop(node, nodename: path, pname: "linux,opened" , NULL, valuelen: 0); |
2437 | |
2438 | /* Setup a usable color table when the appropriate |
2439 | * method is available. Should update this to set-colors */ |
2440 | clut = default_colors; |
2441 | for (i = 0; i < 16; i++, clut += 3) |
2442 | if (prom_set_color(ih, i, r: clut[0], g: clut[1], |
2443 | b: clut[2]) != 0) |
2444 | break; |
2445 | |
2446 | #ifdef CONFIG_LOGO_LINUX_CLUT224 |
2447 | clut = PTRRELOC(logo_linux_clut224.clut); |
2448 | for (i = 0; i < logo_linux_clut224.clutsize; i++, clut += 3) |
2449 | if (prom_set_color(ih, i: i + 32, r: clut[0], g: clut[1], |
2450 | b: clut[2]) != 0) |
2451 | break; |
2452 | #endif /* CONFIG_LOGO_LINUX_CLUT224 */ |
2453 | |
2454 | #ifdef CONFIG_PPC_EARLY_DEBUG_BOOTX |
2455 | if (prom_getprop(node, "linux,boot-display" , NULL, 0) != |
2456 | PROM_ERROR) { |
2457 | u32 width, height, pitch, addr; |
2458 | |
2459 | prom_printf("Setting btext !\n" ); |
2460 | |
2461 | if (prom_getprop(node, "width" , &width, 4) == PROM_ERROR) |
2462 | return; |
2463 | |
2464 | if (prom_getprop(node, "height" , &height, 4) == PROM_ERROR) |
2465 | return; |
2466 | |
2467 | if (prom_getprop(node, "linebytes" , &pitch, 4) == PROM_ERROR) |
2468 | return; |
2469 | |
2470 | if (prom_getprop(node, "address" , &addr, 4) == PROM_ERROR) |
2471 | return; |
2472 | |
2473 | prom_printf("W=%d H=%d LB=%d addr=0x%x\n" , |
2474 | width, height, pitch, addr); |
2475 | btext_setup_display(width, height, 8, pitch, addr); |
2476 | btext_prepare_BAT(); |
2477 | } |
2478 | #endif /* CONFIG_PPC_EARLY_DEBUG_BOOTX */ |
2479 | } |
2480 | } |
2481 | |
2482 | |
2483 | /* Return (relocated) pointer to this much memory: moves initrd if reqd. */ |
2484 | static void __init *make_room(unsigned long *mem_start, unsigned long *mem_end, |
2485 | unsigned long needed, unsigned long align) |
2486 | { |
2487 | void *ret; |
2488 | |
2489 | *mem_start = ALIGN(*mem_start, align); |
2490 | while ((*mem_start + needed) > *mem_end) { |
2491 | unsigned long room, chunk; |
2492 | |
2493 | prom_debug("Chunk exhausted, claiming more at %lx...\n" , |
2494 | alloc_bottom); |
2495 | room = alloc_top - alloc_bottom; |
2496 | if (room > DEVTREE_CHUNK_SIZE) |
2497 | room = DEVTREE_CHUNK_SIZE; |
2498 | if (room < PAGE_SIZE) |
2499 | prom_panic(reason: "No memory for flatten_device_tree " |
2500 | "(no room)\n" ); |
2501 | chunk = alloc_up(size: room, align: 0); |
2502 | if (chunk == 0) |
2503 | prom_panic(reason: "No memory for flatten_device_tree " |
2504 | "(claim failed)\n" ); |
2505 | *mem_end = chunk + room; |
2506 | } |
2507 | |
2508 | ret = (void *)*mem_start; |
2509 | *mem_start += needed; |
2510 | |
2511 | return ret; |
2512 | } |
2513 | |
2514 | #define dt_push_token(token, mem_start, mem_end) do { \ |
2515 | void *room = make_room(mem_start, mem_end, 4, 4); \ |
2516 | *(__be32 *)room = cpu_to_be32(token); \ |
2517 | } while(0) |
2518 | |
2519 | static unsigned long __init dt_find_string(char *str) |
2520 | { |
2521 | char *s, *os; |
2522 | |
2523 | s = os = (char *)dt_string_start; |
2524 | s += 4; |
2525 | while (s < (char *)dt_string_end) { |
2526 | if (prom_strcmp(cs: s, ct: str) == 0) |
2527 | return s - os; |
2528 | s += prom_strlen(s) + 1; |
2529 | } |
2530 | return 0; |
2531 | } |
2532 | |
2533 | /* |
2534 | * The Open Firmware 1275 specification states properties must be 31 bytes or |
2535 | * less, however not all firmwares obey this. Make it 64 bytes to be safe. |
2536 | */ |
2537 | #define MAX_PROPERTY_NAME 64 |
2538 | |
2539 | static void __init scan_dt_build_strings(phandle node, |
2540 | unsigned long *mem_start, |
2541 | unsigned long *mem_end) |
2542 | { |
2543 | char *prev_name, *namep, *sstart; |
2544 | unsigned long soff; |
2545 | phandle child; |
2546 | |
2547 | sstart = (char *)dt_string_start; |
2548 | |
2549 | /* get and store all property names */ |
2550 | prev_name = "" ; |
2551 | for (;;) { |
2552 | /* 64 is max len of name including nul. */ |
2553 | namep = make_room(mem_start, mem_end, MAX_PROPERTY_NAME, align: 1); |
2554 | if (call_prom(service: "nextprop" , nargs: 3, nret: 1, node, prev_name, namep) != 1) { |
2555 | /* No more nodes: unwind alloc */ |
2556 | *mem_start = (unsigned long)namep; |
2557 | break; |
2558 | } |
2559 | |
2560 | /* skip "name" */ |
2561 | if (prom_strcmp(cs: namep, ct: "name" ) == 0) { |
2562 | *mem_start = (unsigned long)namep; |
2563 | prev_name = "name" ; |
2564 | continue; |
2565 | } |
2566 | /* get/create string entry */ |
2567 | soff = dt_find_string(str: namep); |
2568 | if (soff != 0) { |
2569 | *mem_start = (unsigned long)namep; |
2570 | namep = sstart + soff; |
2571 | } else { |
2572 | /* Trim off some if we can */ |
2573 | *mem_start = (unsigned long)namep + prom_strlen(s: namep) + 1; |
2574 | dt_string_end = *mem_start; |
2575 | } |
2576 | prev_name = namep; |
2577 | } |
2578 | |
2579 | /* do all our children */ |
2580 | child = call_prom(service: "child" , nargs: 1, nret: 1, node); |
2581 | while (child != 0) { |
2582 | scan_dt_build_strings(node: child, mem_start, mem_end); |
2583 | child = call_prom(service: "peer" , nargs: 1, nret: 1, child); |
2584 | } |
2585 | } |
2586 | |
2587 | static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start, |
2588 | unsigned long *mem_end) |
2589 | { |
2590 | phandle child; |
2591 | char *namep, *prev_name, *sstart, *p, *ep, *lp, *path; |
2592 | unsigned long soff; |
2593 | unsigned char *valp; |
2594 | static char pname[MAX_PROPERTY_NAME] __prombss; |
2595 | int l, room, has_phandle = 0; |
2596 | |
2597 | dt_push_token(OF_DT_BEGIN_NODE, mem_start, mem_end); |
2598 | |
2599 | /* get the node's full name */ |
2600 | namep = (char *)*mem_start; |
2601 | room = *mem_end - *mem_start; |
2602 | if (room > 255) |
2603 | room = 255; |
2604 | l = call_prom(service: "package-to-path" , nargs: 3, nret: 1, node, namep, room); |
2605 | if (l >= 0) { |
2606 | /* Didn't fit? Get more room. */ |
2607 | if (l >= room) { |
2608 | if (l >= *mem_end - *mem_start) |
2609 | namep = make_room(mem_start, mem_end, needed: l+1, align: 1); |
2610 | call_prom(service: "package-to-path" , nargs: 3, nret: 1, node, namep, l); |
2611 | } |
2612 | namep[l] = '\0'; |
2613 | |
2614 | /* Fixup an Apple bug where they have bogus \0 chars in the |
2615 | * middle of the path in some properties, and extract |
2616 | * the unit name (everything after the last '/'). |
2617 | */ |
2618 | for (lp = p = namep, ep = namep + l; p < ep; p++) { |
2619 | if (*p == '/') |
2620 | lp = namep; |
2621 | else if (*p != 0) |
2622 | *lp++ = *p; |
2623 | } |
2624 | *lp = 0; |
2625 | *mem_start = ALIGN((unsigned long)lp + 1, 4); |
2626 | } |
2627 | |
2628 | /* get it again for debugging */ |
2629 | path = prom_scratch; |
2630 | memset(path, 0, sizeof(prom_scratch)); |
2631 | call_prom(service: "package-to-path" , nargs: 3, nret: 1, node, path, sizeof(prom_scratch) - 1); |
2632 | |
2633 | /* get and store all properties */ |
2634 | prev_name = "" ; |
2635 | sstart = (char *)dt_string_start; |
2636 | for (;;) { |
2637 | if (call_prom(service: "nextprop" , nargs: 3, nret: 1, node, prev_name, |
2638 | pname) != 1) |
2639 | break; |
2640 | |
2641 | /* skip "name" */ |
2642 | if (prom_strcmp(cs: pname, ct: "name" ) == 0) { |
2643 | prev_name = "name" ; |
2644 | continue; |
2645 | } |
2646 | |
2647 | /* find string offset */ |
2648 | soff = dt_find_string(str: pname); |
2649 | if (soff == 0) { |
2650 | prom_printf(format: "WARNING: Can't find string index for" |
2651 | " <%s>, node %s\n" , pname, path); |
2652 | break; |
2653 | } |
2654 | prev_name = sstart + soff; |
2655 | |
2656 | /* get length */ |
2657 | l = call_prom(service: "getproplen" , nargs: 2, nret: 1, node, pname); |
2658 | |
2659 | /* sanity checks */ |
2660 | if (l == PROM_ERROR) |
2661 | continue; |
2662 | |
2663 | /* push property head */ |
2664 | dt_push_token(OF_DT_PROP, mem_start, mem_end); |
2665 | dt_push_token(l, mem_start, mem_end); |
2666 | dt_push_token(soff, mem_start, mem_end); |
2667 | |
2668 | /* push property content */ |
2669 | valp = make_room(mem_start, mem_end, needed: l, align: 4); |
2670 | call_prom(service: "getprop" , nargs: 4, nret: 1, node, pname, valp, l); |
2671 | *mem_start = ALIGN(*mem_start, 4); |
2672 | |
2673 | if (!prom_strcmp(cs: pname, ct: "phandle" )) |
2674 | has_phandle = 1; |
2675 | } |
2676 | |
2677 | /* Add a "phandle" property if none already exist */ |
2678 | if (!has_phandle) { |
2679 | soff = dt_find_string(str: "phandle" ); |
2680 | if (soff == 0) |
2681 | prom_printf(format: "WARNING: Can't find string index for <phandle> node %s\n" , path); |
2682 | else { |
2683 | dt_push_token(OF_DT_PROP, mem_start, mem_end); |
2684 | dt_push_token(4, mem_start, mem_end); |
2685 | dt_push_token(soff, mem_start, mem_end); |
2686 | valp = make_room(mem_start, mem_end, needed: 4, align: 4); |
2687 | *(__be32 *)valp = cpu_to_be32(node); |
2688 | } |
2689 | } |
2690 | |
2691 | /* do all our children */ |
2692 | child = call_prom(service: "child" , nargs: 1, nret: 1, node); |
2693 | while (child != 0) { |
2694 | scan_dt_build_struct(node: child, mem_start, mem_end); |
2695 | child = call_prom(service: "peer" , nargs: 1, nret: 1, child); |
2696 | } |
2697 | |
2698 | dt_push_token(OF_DT_END_NODE, mem_start, mem_end); |
2699 | } |
2700 | |
2701 | static void __init flatten_device_tree(void) |
2702 | { |
2703 | phandle root; |
2704 | unsigned long mem_start, mem_end, room; |
2705 | struct *hdr; |
2706 | char *namep; |
2707 | u64 *rsvmap; |
2708 | |
2709 | /* |
2710 | * Check how much room we have between alloc top & bottom (+/- a |
2711 | * few pages), crop to 1MB, as this is our "chunk" size |
2712 | */ |
2713 | room = alloc_top - alloc_bottom - 0x4000; |
2714 | if (room > DEVTREE_CHUNK_SIZE) |
2715 | room = DEVTREE_CHUNK_SIZE; |
2716 | prom_debug("starting device tree allocs at %lx\n" , alloc_bottom); |
2717 | |
2718 | /* Now try to claim that */ |
2719 | mem_start = (unsigned long)alloc_up(size: room, PAGE_SIZE); |
2720 | if (mem_start == 0) |
2721 | prom_panic(reason: "Can't allocate initial device-tree chunk\n" ); |
2722 | mem_end = mem_start + room; |
2723 | |
2724 | /* Get root of tree */ |
2725 | root = call_prom(service: "peer" , nargs: 1, nret: 1, (phandle)0); |
2726 | if (root == (phandle)0) |
2727 | prom_panic (reason: "couldn't get device tree root\n" ); |
2728 | |
2729 | /* Build header and make room for mem rsv map */ |
2730 | mem_start = ALIGN(mem_start, 4); |
2731 | hdr = make_room(&mem_start, &mem_end, |
2732 | sizeof(struct boot_param_header), 4); |
2733 | dt_header_start = (unsigned long)hdr; |
2734 | rsvmap = make_room(mem_start: &mem_start, mem_end: &mem_end, needed: sizeof(mem_reserve_map), align: 8); |
2735 | |
2736 | /* Start of strings */ |
2737 | mem_start = PAGE_ALIGN(mem_start); |
2738 | dt_string_start = mem_start; |
2739 | mem_start += 4; /* hole */ |
2740 | |
2741 | /* Add "phandle" in there, we'll need it */ |
2742 | namep = make_room(mem_start: &mem_start, mem_end: &mem_end, needed: 16, align: 1); |
2743 | prom_strscpy_pad(dest: namep, src: "phandle" , n: sizeof("phandle" )); |
2744 | mem_start = (unsigned long)namep + prom_strlen(s: namep) + 1; |
2745 | |
2746 | /* Build string array */ |
2747 | prom_printf(format: "Building dt strings...\n" ); |
2748 | scan_dt_build_strings(node: root, mem_start: &mem_start, mem_end: &mem_end); |
2749 | dt_string_end = mem_start; |
2750 | |
2751 | /* Build structure */ |
2752 | mem_start = PAGE_ALIGN(mem_start); |
2753 | dt_struct_start = mem_start; |
2754 | prom_printf(format: "Building dt structure...\n" ); |
2755 | scan_dt_build_struct(node: root, mem_start: &mem_start, mem_end: &mem_end); |
2756 | dt_push_token(OF_DT_END, &mem_start, &mem_end); |
2757 | dt_struct_end = PAGE_ALIGN(mem_start); |
2758 | |
2759 | /* Finish header */ |
2760 | hdr->boot_cpuid_phys = cpu_to_be32(prom.cpu); |
2761 | hdr->magic = cpu_to_be32(OF_DT_HEADER); |
2762 | hdr->totalsize = cpu_to_be32(dt_struct_end - dt_header_start); |
2763 | hdr->off_dt_struct = cpu_to_be32(dt_struct_start - dt_header_start); |
2764 | hdr->off_dt_strings = cpu_to_be32(dt_string_start - dt_header_start); |
2765 | hdr->dt_strings_size = cpu_to_be32(dt_string_end - dt_string_start); |
2766 | hdr->off_mem_rsvmap = cpu_to_be32(((unsigned long)rsvmap) - dt_header_start); |
2767 | hdr->version = cpu_to_be32(OF_DT_VERSION); |
2768 | /* Version 16 is not backward compatible */ |
2769 | hdr->last_comp_version = cpu_to_be32(0x10); |
2770 | |
2771 | /* Copy the reserve map in */ |
2772 | memcpy(rsvmap, mem_reserve_map, sizeof(mem_reserve_map)); |
2773 | |
2774 | #ifdef DEBUG_PROM |
2775 | { |
2776 | int i; |
2777 | prom_printf("reserved memory map:\n" ); |
2778 | for (i = 0; i < mem_reserve_cnt; i++) |
2779 | prom_printf(" %llx - %llx\n" , |
2780 | be64_to_cpu(mem_reserve_map[i].base), |
2781 | be64_to_cpu(mem_reserve_map[i].size)); |
2782 | } |
2783 | #endif |
2784 | /* Bump mem_reserve_cnt to cause further reservations to fail |
2785 | * since it's too late. |
2786 | */ |
2787 | mem_reserve_cnt = MEM_RESERVE_MAP_SIZE; |
2788 | |
2789 | prom_printf(format: "Device tree strings 0x%lx -> 0x%lx\n" , |
2790 | dt_string_start, dt_string_end); |
2791 | prom_printf(format: "Device tree struct 0x%lx -> 0x%lx\n" , |
2792 | dt_struct_start, dt_struct_end); |
2793 | } |
2794 | |
2795 | #ifdef CONFIG_PPC_MAPLE |
2796 | /* PIBS Version 1.05.0000 04/26/2005 has an incorrect /ht/isa/ranges property. |
2797 | * The values are bad, and it doesn't even have the right number of cells. */ |
2798 | static void __init fixup_device_tree_maple(void) |
2799 | { |
2800 | phandle isa; |
2801 | u32 rloc = 0x01002000; /* IO space; PCI device = 4 */ |
2802 | u32 isa_ranges[6]; |
2803 | char *name; |
2804 | |
2805 | name = "/ht@0/isa@4" ; |
2806 | isa = call_prom("finddevice" , 1, 1, ADDR(name)); |
2807 | if (!PHANDLE_VALID(isa)) { |
2808 | name = "/ht@0/isa@6" ; |
2809 | isa = call_prom("finddevice" , 1, 1, ADDR(name)); |
2810 | rloc = 0x01003000; /* IO space; PCI device = 6 */ |
2811 | } |
2812 | if (!PHANDLE_VALID(isa)) |
2813 | return; |
2814 | |
2815 | if (prom_getproplen(isa, "ranges" ) != 12) |
2816 | return; |
2817 | if (prom_getprop(isa, "ranges" , isa_ranges, sizeof(isa_ranges)) |
2818 | == PROM_ERROR) |
2819 | return; |
2820 | |
2821 | if (isa_ranges[0] != 0x1 || |
2822 | isa_ranges[1] != 0xf4000000 || |
2823 | isa_ranges[2] != 0x00010000) |
2824 | return; |
2825 | |
2826 | prom_printf("Fixing up bogus ISA range on Maple/Apache...\n" ); |
2827 | |
2828 | isa_ranges[0] = 0x1; |
2829 | isa_ranges[1] = 0x0; |
2830 | isa_ranges[2] = rloc; |
2831 | isa_ranges[3] = 0x0; |
2832 | isa_ranges[4] = 0x0; |
2833 | isa_ranges[5] = 0x00010000; |
2834 | prom_setprop(isa, name, "ranges" , |
2835 | isa_ranges, sizeof(isa_ranges)); |
2836 | } |
2837 | |
2838 | #define CPC925_MC_START 0xf8000000 |
2839 | #define CPC925_MC_LENGTH 0x1000000 |
2840 | /* The values for memory-controller don't have right number of cells */ |
2841 | static void __init fixup_device_tree_maple_memory_controller(void) |
2842 | { |
2843 | phandle mc; |
2844 | u32 mc_reg[4]; |
2845 | char *name = "/hostbridge@f8000000" ; |
2846 | u32 ac, sc; |
2847 | |
2848 | mc = call_prom("finddevice" , 1, 1, ADDR(name)); |
2849 | if (!PHANDLE_VALID(mc)) |
2850 | return; |
2851 | |
2852 | if (prom_getproplen(mc, "reg" ) != 8) |
2853 | return; |
2854 | |
2855 | prom_getprop(prom.root, "#address-cells" , &ac, sizeof(ac)); |
2856 | prom_getprop(prom.root, "#size-cells" , &sc, sizeof(sc)); |
2857 | if ((ac != 2) || (sc != 2)) |
2858 | return; |
2859 | |
2860 | if (prom_getprop(mc, "reg" , mc_reg, sizeof(mc_reg)) == PROM_ERROR) |
2861 | return; |
2862 | |
2863 | if (mc_reg[0] != CPC925_MC_START || mc_reg[1] != CPC925_MC_LENGTH) |
2864 | return; |
2865 | |
2866 | prom_printf("Fixing up bogus hostbridge on Maple...\n" ); |
2867 | |
2868 | mc_reg[0] = 0x0; |
2869 | mc_reg[1] = CPC925_MC_START; |
2870 | mc_reg[2] = 0x0; |
2871 | mc_reg[3] = CPC925_MC_LENGTH; |
2872 | prom_setprop(mc, name, "reg" , mc_reg, sizeof(mc_reg)); |
2873 | } |
2874 | #else |
2875 | #define fixup_device_tree_maple() |
2876 | #define fixup_device_tree_maple_memory_controller() |
2877 | #endif |
2878 | |
2879 | #ifdef CONFIG_PPC_CHRP |
2880 | /* |
2881 | * Pegasos and BriQ lacks the "ranges" property in the isa node |
2882 | * Pegasos needs decimal IRQ 14/15, not hexadecimal |
2883 | * Pegasos has the IDE configured in legacy mode, but advertised as native |
2884 | */ |
2885 | static void __init fixup_device_tree_chrp(void) |
2886 | { |
2887 | phandle ph; |
2888 | u32 prop[6]; |
2889 | u32 rloc = 0x01006000; /* IO space; PCI device = 12 */ |
2890 | char *name; |
2891 | int rc; |
2892 | |
2893 | name = "/pci@80000000/isa@c" ; |
2894 | ph = call_prom("finddevice" , 1, 1, ADDR(name)); |
2895 | if (!PHANDLE_VALID(ph)) { |
2896 | name = "/pci@ff500000/isa@6" ; |
2897 | ph = call_prom("finddevice" , 1, 1, ADDR(name)); |
2898 | rloc = 0x01003000; /* IO space; PCI device = 6 */ |
2899 | } |
2900 | if (PHANDLE_VALID(ph)) { |
2901 | rc = prom_getproplen(ph, "ranges" ); |
2902 | if (rc == 0 || rc == PROM_ERROR) { |
2903 | prom_printf("Fixing up missing ISA range on Pegasos...\n" ); |
2904 | |
2905 | prop[0] = 0x1; |
2906 | prop[1] = 0x0; |
2907 | prop[2] = rloc; |
2908 | prop[3] = 0x0; |
2909 | prop[4] = 0x0; |
2910 | prop[5] = 0x00010000; |
2911 | prom_setprop(ph, name, "ranges" , prop, sizeof(prop)); |
2912 | } |
2913 | } |
2914 | |
2915 | name = "/pci@80000000/ide@C,1" ; |
2916 | ph = call_prom("finddevice" , 1, 1, ADDR(name)); |
2917 | if (PHANDLE_VALID(ph)) { |
2918 | prom_printf("Fixing up IDE interrupt on Pegasos...\n" ); |
2919 | prop[0] = 14; |
2920 | prop[1] = 0x0; |
2921 | prom_setprop(ph, name, "interrupts" , prop, 2*sizeof(u32)); |
2922 | prom_printf("Fixing up IDE class-code on Pegasos...\n" ); |
2923 | rc = prom_getprop(ph, "class-code" , prop, sizeof(u32)); |
2924 | if (rc == sizeof(u32)) { |
2925 | prop[0] &= ~0x5; |
2926 | prom_setprop(ph, name, "class-code" , prop, sizeof(u32)); |
2927 | } |
2928 | } |
2929 | } |
2930 | #else |
2931 | #define fixup_device_tree_chrp() |
2932 | #endif |
2933 | |
2934 | #if defined(CONFIG_PPC64) && defined(CONFIG_PPC_PMAC) |
2935 | static void __init fixup_device_tree_pmac(void) |
2936 | { |
2937 | phandle u3, i2c, mpic; |
2938 | u32 u3_rev; |
2939 | u32 interrupts[2]; |
2940 | u32 parent; |
2941 | |
2942 | /* Some G5s have a missing interrupt definition, fix it up here */ |
2943 | u3 = call_prom("finddevice" , 1, 1, ADDR("/u3@0,f8000000" )); |
2944 | if (!PHANDLE_VALID(u3)) |
2945 | return; |
2946 | i2c = call_prom("finddevice" , 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000" )); |
2947 | if (!PHANDLE_VALID(i2c)) |
2948 | return; |
2949 | mpic = call_prom("finddevice" , 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000" )); |
2950 | if (!PHANDLE_VALID(mpic)) |
2951 | return; |
2952 | |
2953 | /* check if proper rev of u3 */ |
2954 | if (prom_getprop(u3, "device-rev" , &u3_rev, sizeof(u3_rev)) |
2955 | == PROM_ERROR) |
2956 | return; |
2957 | if (u3_rev < 0x35 || u3_rev > 0x39) |
2958 | return; |
2959 | /* does it need fixup ? */ |
2960 | if (prom_getproplen(i2c, "interrupts" ) > 0) |
2961 | return; |
2962 | |
2963 | prom_printf("fixing up bogus interrupts for u3 i2c...\n" ); |
2964 | |
2965 | /* interrupt on this revision of u3 is number 0 and level */ |
2966 | interrupts[0] = 0; |
2967 | interrupts[1] = 1; |
2968 | prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000" , "interrupts" , |
2969 | &interrupts, sizeof(interrupts)); |
2970 | parent = (u32)mpic; |
2971 | prom_setprop(i2c, "/u3@0,f8000000/i2c@f8001000" , "interrupt-parent" , |
2972 | &parent, sizeof(parent)); |
2973 | } |
2974 | #else |
2975 | #define fixup_device_tree_pmac() |
2976 | #endif |
2977 | |
2978 | #ifdef CONFIG_PPC_EFIKA |
2979 | /* |
2980 | * The MPC5200 FEC driver requires an phy-handle property to tell it how |
2981 | * to talk to the phy. If the phy-handle property is missing, then this |
2982 | * function is called to add the appropriate nodes and link it to the |
2983 | * ethernet node. |
2984 | */ |
2985 | static void __init fixup_device_tree_efika_add_phy(void) |
2986 | { |
2987 | u32 node; |
2988 | char prop[64]; |
2989 | int rv; |
2990 | |
2991 | /* Check if /builtin/ethernet exists - bail if it doesn't */ |
2992 | node = call_prom("finddevice" , 1, 1, ADDR("/builtin/ethernet" )); |
2993 | if (!PHANDLE_VALID(node)) |
2994 | return; |
2995 | |
2996 | /* Check if the phy-handle property exists - bail if it does */ |
2997 | rv = prom_getprop(node, "phy-handle" , prop, sizeof(prop)); |
2998 | if (rv <= 0) |
2999 | return; |
3000 | |
3001 | /* |
3002 | * At this point the ethernet device doesn't have a phy described. |
3003 | * Now we need to add the missing phy node and linkage |
3004 | */ |
3005 | |
3006 | /* Check for an MDIO bus node - if missing then create one */ |
3007 | node = call_prom("finddevice" , 1, 1, ADDR("/builtin/mdio" )); |
3008 | if (!PHANDLE_VALID(node)) { |
3009 | prom_printf("Adding Ethernet MDIO node\n" ); |
3010 | call_prom("interpret" , 1, 1, |
3011 | " s\" /builtin\" find-device" |
3012 | " new-device" |
3013 | " 1 encode-int s\" #address-cells\" property" |
3014 | " 0 encode-int s\" #size-cells\" property" |
3015 | " s\" mdio\" device-name" |
3016 | " s\" fsl,mpc5200b-mdio\" encode-string" |
3017 | " s\" compatible\" property" |
3018 | " 0xf0003000 0x400 reg" |
3019 | " 0x2 encode-int" |
3020 | " 0x5 encode-int encode+" |
3021 | " 0x3 encode-int encode+" |
3022 | " s\" interrupts\" property" |
3023 | " finish-device" ); |
3024 | } |
3025 | |
3026 | /* Check for a PHY device node - if missing then create one and |
3027 | * give it's phandle to the ethernet node */ |
3028 | node = call_prom("finddevice" , 1, 1, |
3029 | ADDR("/builtin/mdio/ethernet-phy" )); |
3030 | if (!PHANDLE_VALID(node)) { |
3031 | prom_printf("Adding Ethernet PHY node\n" ); |
3032 | call_prom("interpret" , 1, 1, |
3033 | " s\" /builtin/mdio\" find-device" |
3034 | " new-device" |
3035 | " s\" ethernet-phy\" device-name" |
3036 | " 0x10 encode-int s\" reg\" property" |
3037 | " my-self" |
3038 | " ihandle>phandle" |
3039 | " finish-device" |
3040 | " s\" /builtin/ethernet\" find-device" |
3041 | " encode-int" |
3042 | " s\" phy-handle\" property" |
3043 | " device-end" ); |
3044 | } |
3045 | } |
3046 | |
3047 | static void __init fixup_device_tree_efika(void) |
3048 | { |
3049 | int sound_irq[3] = { 2, 2, 0 }; |
3050 | int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0, |
3051 | 3,4,0, 3,5,0, 3,6,0, 3,7,0, |
3052 | 3,8,0, 3,9,0, 3,10,0, 3,11,0, |
3053 | 3,12,0, 3,13,0, 3,14,0, 3,15,0 }; |
3054 | u32 node; |
3055 | char prop[64]; |
3056 | int rv, len; |
3057 | |
3058 | /* Check if we're really running on a EFIKA */ |
3059 | node = call_prom("finddevice" , 1, 1, ADDR("/" )); |
3060 | if (!PHANDLE_VALID(node)) |
3061 | return; |
3062 | |
3063 | rv = prom_getprop(node, "model" , prop, sizeof(prop)); |
3064 | if (rv == PROM_ERROR) |
3065 | return; |
3066 | if (prom_strcmp(prop, "EFIKA5K2" )) |
3067 | return; |
3068 | |
3069 | prom_printf("Applying EFIKA device tree fixups\n" ); |
3070 | |
3071 | /* Claiming to be 'chrp' is death */ |
3072 | node = call_prom("finddevice" , 1, 1, ADDR("/" )); |
3073 | rv = prom_getprop(node, "device_type" , prop, sizeof(prop)); |
3074 | if (rv != PROM_ERROR && (prom_strcmp(prop, "chrp" ) == 0)) |
3075 | prom_setprop(node, "/" , "device_type" , "efika" , sizeof("efika" )); |
3076 | |
3077 | /* CODEGEN,description is exposed in /proc/cpuinfo so |
3078 | fix that too */ |
3079 | rv = prom_getprop(node, "CODEGEN,description" , prop, sizeof(prop)); |
3080 | if (rv != PROM_ERROR && (prom_strstr(prop, "CHRP" ))) |
3081 | prom_setprop(node, "/" , "CODEGEN,description" , |
3082 | "Efika 5200B PowerPC System" , |
3083 | sizeof("Efika 5200B PowerPC System" )); |
3084 | |
3085 | /* Fixup bestcomm interrupts property */ |
3086 | node = call_prom("finddevice" , 1, 1, ADDR("/builtin/bestcomm" )); |
3087 | if (PHANDLE_VALID(node)) { |
3088 | len = prom_getproplen(node, "interrupts" ); |
3089 | if (len == 12) { |
3090 | prom_printf("Fixing bestcomm interrupts property\n" ); |
3091 | prom_setprop(node, "/builtin/bestcom" , "interrupts" , |
3092 | bcomm_irq, sizeof(bcomm_irq)); |
3093 | } |
3094 | } |
3095 | |
3096 | /* Fixup sound interrupts property */ |
3097 | node = call_prom("finddevice" , 1, 1, ADDR("/builtin/sound" )); |
3098 | if (PHANDLE_VALID(node)) { |
3099 | rv = prom_getprop(node, "interrupts" , prop, sizeof(prop)); |
3100 | if (rv == PROM_ERROR) { |
3101 | prom_printf("Adding sound interrupts property\n" ); |
3102 | prom_setprop(node, "/builtin/sound" , "interrupts" , |
3103 | sound_irq, sizeof(sound_irq)); |
3104 | } |
3105 | } |
3106 | |
3107 | /* Make sure ethernet phy-handle property exists */ |
3108 | fixup_device_tree_efika_add_phy(); |
3109 | } |
3110 | #else |
3111 | #define fixup_device_tree_efika() |
3112 | #endif |
3113 | |
3114 | #ifdef CONFIG_PPC_PASEMI_NEMO |
3115 | /* |
3116 | * CFE supplied on Nemo is broken in several ways, biggest |
3117 | * problem is that it reassigns ISA interrupts to unused mpic ints. |
3118 | * Add an interrupt-controller property for the io-bridge to use |
3119 | * and correct the ints so we can attach them to an irq_domain |
3120 | */ |
3121 | static void __init fixup_device_tree_pasemi(void) |
3122 | { |
3123 | u32 interrupts[2], parent, rval, val = 0; |
3124 | char *name, *pci_name; |
3125 | phandle iob, node; |
3126 | |
3127 | /* Find the root pci node */ |
3128 | name = "/pxp@0,e0000000" ; |
3129 | iob = call_prom("finddevice" , 1, 1, ADDR(name)); |
3130 | if (!PHANDLE_VALID(iob)) |
3131 | return; |
3132 | |
3133 | /* check if interrupt-controller node set yet */ |
3134 | if (prom_getproplen(iob, "interrupt-controller" ) !=PROM_ERROR) |
3135 | return; |
3136 | |
3137 | prom_printf("adding interrupt-controller property for SB600...\n" ); |
3138 | |
3139 | prom_setprop(iob, name, "interrupt-controller" , &val, 0); |
3140 | |
3141 | pci_name = "/pxp@0,e0000000/pci@11" ; |
3142 | node = call_prom("finddevice" , 1, 1, ADDR(pci_name)); |
3143 | parent = ADDR(iob); |
3144 | |
3145 | for( ; prom_next_node(&node); ) { |
3146 | /* scan each node for one with an interrupt */ |
3147 | if (!PHANDLE_VALID(node)) |
3148 | continue; |
3149 | |
3150 | rval = prom_getproplen(node, "interrupts" ); |
3151 | if (rval == 0 || rval == PROM_ERROR) |
3152 | continue; |
3153 | |
3154 | prom_getprop(node, "interrupts" , &interrupts, sizeof(interrupts)); |
3155 | if ((interrupts[0] < 212) || (interrupts[0] > 222)) |
3156 | continue; |
3157 | |
3158 | /* found a node, update both interrupts and interrupt-parent */ |
3159 | if ((interrupts[0] >= 212) && (interrupts[0] <= 215)) |
3160 | interrupts[0] -= 203; |
3161 | if ((interrupts[0] >= 216) && (interrupts[0] <= 220)) |
3162 | interrupts[0] -= 213; |
3163 | if (interrupts[0] == 221) |
3164 | interrupts[0] = 14; |
3165 | if (interrupts[0] == 222) |
3166 | interrupts[0] = 8; |
3167 | |
3168 | prom_setprop(node, pci_name, "interrupts" , interrupts, |
3169 | sizeof(interrupts)); |
3170 | prom_setprop(node, pci_name, "interrupt-parent" , &parent, |
3171 | sizeof(parent)); |
3172 | } |
3173 | |
3174 | /* |
3175 | * The io-bridge has device_type set to 'io-bridge' change it to 'isa' |
3176 | * so that generic isa-bridge code can add the SB600 and its on-board |
3177 | * peripherals. |
3178 | */ |
3179 | name = "/pxp@0,e0000000/io-bridge@0" ; |
3180 | iob = call_prom("finddevice" , 1, 1, ADDR(name)); |
3181 | if (!PHANDLE_VALID(iob)) |
3182 | return; |
3183 | |
3184 | /* device_type is already set, just change it. */ |
3185 | |
3186 | prom_printf("Changing device_type of SB600 node...\n" ); |
3187 | |
3188 | prom_setprop(iob, name, "device_type" , "isa" , sizeof("isa" )); |
3189 | } |
3190 | #else /* !CONFIG_PPC_PASEMI_NEMO */ |
3191 | static inline void fixup_device_tree_pasemi(void) { } |
3192 | #endif |
3193 | |
3194 | static void __init fixup_device_tree(void) |
3195 | { |
3196 | fixup_device_tree_maple(); |
3197 | fixup_device_tree_maple_memory_controller(); |
3198 | fixup_device_tree_chrp(); |
3199 | fixup_device_tree_pmac(); |
3200 | fixup_device_tree_efika(); |
3201 | fixup_device_tree_pasemi(); |
3202 | } |
3203 | |
3204 | static void __init prom_find_boot_cpu(void) |
3205 | { |
3206 | __be32 rval; |
3207 | ihandle prom_cpu; |
3208 | phandle cpu_pkg; |
3209 | |
3210 | rval = 0; |
3211 | if (prom_getprop(node: prom.chosen, pname: "cpu" , value: &rval, valuelen: sizeof(rval)) <= 0) |
3212 | return; |
3213 | prom_cpu = be32_to_cpu(rval); |
3214 | |
3215 | cpu_pkg = call_prom(service: "instance-to-package" , nargs: 1, nret: 1, prom_cpu); |
3216 | |
3217 | if (!PHANDLE_VALID(cpu_pkg)) |
3218 | return; |
3219 | |
3220 | prom_getprop(node: cpu_pkg, pname: "reg" , value: &rval, valuelen: sizeof(rval)); |
3221 | prom.cpu = be32_to_cpu(rval); |
3222 | |
3223 | prom_debug("Booting CPU hw index = %d\n" , prom.cpu); |
3224 | } |
3225 | |
3226 | static void __init prom_check_initrd(unsigned long r3, unsigned long r4) |
3227 | { |
3228 | #ifdef CONFIG_BLK_DEV_INITRD |
3229 | if (r3 && r4 && r4 != 0xdeadbeef) { |
3230 | __be64 val; |
3231 | |
3232 | prom_initrd_start = is_kernel_addr(r3) ? __pa(r3) : r3; |
3233 | prom_initrd_end = prom_initrd_start + r4; |
3234 | |
3235 | val = cpu_to_be64(prom_initrd_start); |
3236 | prom_setprop(node: prom.chosen, nodename: "/chosen" , pname: "linux,initrd-start" , |
3237 | value: &val, valuelen: sizeof(val)); |
3238 | val = cpu_to_be64(prom_initrd_end); |
3239 | prom_setprop(node: prom.chosen, nodename: "/chosen" , pname: "linux,initrd-end" , |
3240 | value: &val, valuelen: sizeof(val)); |
3241 | |
3242 | reserve_mem(base: prom_initrd_start, |
3243 | size: prom_initrd_end - prom_initrd_start); |
3244 | |
3245 | prom_debug("initrd_start=0x%lx\n" , prom_initrd_start); |
3246 | prom_debug("initrd_end=0x%lx\n" , prom_initrd_end); |
3247 | } |
3248 | #endif /* CONFIG_BLK_DEV_INITRD */ |
3249 | } |
3250 | |
3251 | #ifdef CONFIG_PPC_SVM |
3252 | /* |
3253 | * Perform the Enter Secure Mode ultracall. |
3254 | */ |
3255 | static int __init enter_secure_mode(unsigned long kbase, unsigned long fdt) |
3256 | { |
3257 | register unsigned long r3 asm("r3" ) = UV_ESM; |
3258 | register unsigned long r4 asm("r4" ) = kbase; |
3259 | register unsigned long r5 asm("r5" ) = fdt; |
3260 | |
3261 | asm volatile("sc 2" : "+r" (r3) : "r" (r4), "r" (r5)); |
3262 | |
3263 | return r3; |
3264 | } |
3265 | |
3266 | /* |
3267 | * Call the Ultravisor to transfer us to secure memory if we have an ESM blob. |
3268 | */ |
3269 | static void __init setup_secure_guest(unsigned long kbase, unsigned long fdt) |
3270 | { |
3271 | int ret; |
3272 | |
3273 | if (!prom_svm_enable) |
3274 | return; |
3275 | |
3276 | /* Switch to secure mode. */ |
3277 | prom_printf("Switching to secure mode.\n" ); |
3278 | |
3279 | /* |
3280 | * The ultravisor will do an integrity check of the kernel image but we |
3281 | * relocated it so the check will fail. Restore the original image by |
3282 | * relocating it back to the kernel virtual base address. |
3283 | */ |
3284 | relocate(KERNELBASE); |
3285 | |
3286 | ret = enter_secure_mode(kbase, fdt); |
3287 | |
3288 | /* Relocate the kernel again. */ |
3289 | relocate(kbase); |
3290 | |
3291 | if (ret != U_SUCCESS) { |
3292 | prom_printf("Returned %d from switching to secure mode.\n" , ret); |
3293 | prom_rtas_os_term("Switch to secure mode failed.\n" ); |
3294 | } |
3295 | } |
3296 | #else |
3297 | static void __init setup_secure_guest(unsigned long kbase, unsigned long fdt) |
3298 | { |
3299 | } |
3300 | #endif /* CONFIG_PPC_SVM */ |
3301 | |
3302 | /* |
3303 | * We enter here early on, when the Open Firmware prom is still |
3304 | * handling exceptions and the MMU hash table for us. |
3305 | */ |
3306 | |
3307 | unsigned long __init prom_init(unsigned long r3, unsigned long r4, |
3308 | unsigned long pp, |
3309 | unsigned long r6, unsigned long r7, |
3310 | unsigned long kbase) |
3311 | { |
3312 | unsigned long hdr; |
3313 | |
3314 | #ifdef CONFIG_PPC32 |
3315 | unsigned long offset = reloc_offset(); |
3316 | reloc_got2(offset); |
3317 | #endif |
3318 | |
3319 | /* |
3320 | * First zero the BSS |
3321 | */ |
3322 | memset(&__bss_start, 0, __bss_stop - __bss_start); |
3323 | |
3324 | /* |
3325 | * Init interface to Open Firmware, get some node references, |
3326 | * like /chosen |
3327 | */ |
3328 | prom_init_client_services(pp); |
3329 | |
3330 | /* |
3331 | * See if this OF is old enough that we need to do explicit maps |
3332 | * and other workarounds |
3333 | */ |
3334 | prom_find_mmu(); |
3335 | |
3336 | /* |
3337 | * Init prom stdout device |
3338 | */ |
3339 | prom_init_stdout(); |
3340 | |
3341 | prom_printf(format: "Preparing to boot %s" , linux_banner); |
3342 | |
3343 | /* |
3344 | * Get default machine type. At this point, we do not differentiate |
3345 | * between pSeries SMP and pSeries LPAR |
3346 | */ |
3347 | of_platform = prom_find_machine_type(); |
3348 | prom_printf(format: "Detected machine type: %x\n" , of_platform); |
3349 | |
3350 | #ifndef CONFIG_NONSTATIC_KERNEL |
3351 | /* Bail if this is a kdump kernel. */ |
3352 | if (PHYSICAL_START > 0) |
3353 | prom_panic(reason: "Error: You can't boot a kdump kernel from OF!\n" ); |
3354 | #endif |
3355 | |
3356 | /* |
3357 | * Check for an initrd |
3358 | */ |
3359 | prom_check_initrd(r3, r4); |
3360 | |
3361 | /* |
3362 | * Do early parsing of command line |
3363 | */ |
3364 | early_cmdline_parse(); |
3365 | |
3366 | #ifdef CONFIG_PPC_PSERIES |
3367 | /* |
3368 | * On pSeries, inform the firmware about our capabilities |
3369 | */ |
3370 | if (of_platform == PLATFORM_PSERIES || |
3371 | of_platform == PLATFORM_PSERIES_LPAR) |
3372 | prom_send_capabilities(); |
3373 | #endif |
3374 | |
3375 | /* |
3376 | * Copy the CPU hold code |
3377 | */ |
3378 | if (of_platform != PLATFORM_POWERMAC) |
3379 | copy_and_flush(dest: 0, src: kbase, size: 0x100, offset: 0); |
3380 | |
3381 | /* |
3382 | * Initialize memory management within prom_init |
3383 | */ |
3384 | prom_init_mem(); |
3385 | |
3386 | /* |
3387 | * Determine which cpu is actually running right _now_ |
3388 | */ |
3389 | prom_find_boot_cpu(); |
3390 | |
3391 | /* |
3392 | * Initialize display devices |
3393 | */ |
3394 | prom_check_displays(); |
3395 | |
3396 | #if defined(CONFIG_PPC64) && defined(__BIG_ENDIAN__) |
3397 | /* |
3398 | * Initialize IOMMU (TCE tables) on pSeries. Do that before anything else |
3399 | * that uses the allocator, we need to make sure we get the top of memory |
3400 | * available for us here... |
3401 | */ |
3402 | if (of_platform == PLATFORM_PSERIES) |
3403 | prom_initialize_tce_table(); |
3404 | #endif |
3405 | |
3406 | /* |
3407 | * On non-powermacs, try to instantiate RTAS. PowerMacs don't |
3408 | * have a usable RTAS implementation. |
3409 | */ |
3410 | if (of_platform != PLATFORM_POWERMAC) |
3411 | prom_instantiate_rtas(); |
3412 | |
3413 | #ifdef CONFIG_PPC64 |
3414 | /* instantiate sml */ |
3415 | prom_instantiate_sml(); |
3416 | #endif |
3417 | |
3418 | /* |
3419 | * On non-powermacs, put all CPUs in spin-loops. |
3420 | * |
3421 | * PowerMacs use a different mechanism to spin CPUs |
3422 | * |
3423 | * (This must be done after instantiating RTAS) |
3424 | */ |
3425 | if (of_platform != PLATFORM_POWERMAC) |
3426 | prom_hold_cpus(); |
3427 | |
3428 | /* |
3429 | * Fill in some infos for use by the kernel later on |
3430 | */ |
3431 | if (prom_memory_limit) { |
3432 | __be64 val = cpu_to_be64(prom_memory_limit); |
3433 | prom_setprop(node: prom.chosen, nodename: "/chosen" , pname: "linux,memory-limit" , |
3434 | value: &val, valuelen: sizeof(val)); |
3435 | } |
3436 | #ifdef CONFIG_PPC64 |
3437 | if (prom_iommu_off) |
3438 | prom_setprop(prom.chosen, "/chosen" , "linux,iommu-off" , |
3439 | NULL, 0); |
3440 | |
3441 | if (prom_iommu_force_on) |
3442 | prom_setprop(prom.chosen, "/chosen" , "linux,iommu-force-on" , |
3443 | NULL, 0); |
3444 | |
3445 | if (prom_tce_alloc_start) { |
3446 | prom_setprop(prom.chosen, "/chosen" , "linux,tce-alloc-start" , |
3447 | &prom_tce_alloc_start, |
3448 | sizeof(prom_tce_alloc_start)); |
3449 | prom_setprop(prom.chosen, "/chosen" , "linux,tce-alloc-end" , |
3450 | &prom_tce_alloc_end, |
3451 | sizeof(prom_tce_alloc_end)); |
3452 | } |
3453 | #endif |
3454 | |
3455 | /* |
3456 | * Fixup any known bugs in the device-tree |
3457 | */ |
3458 | fixup_device_tree(); |
3459 | |
3460 | /* |
3461 | * Now finally create the flattened device-tree |
3462 | */ |
3463 | prom_printf(format: "copying OF device tree...\n" ); |
3464 | flatten_device_tree(); |
3465 | |
3466 | /* |
3467 | * in case stdin is USB and still active on IBM machines... |
3468 | * Unfortunately quiesce crashes on some powermacs if we have |
3469 | * closed stdin already (in particular the powerbook 101). |
3470 | */ |
3471 | if (of_platform != PLATFORM_POWERMAC) |
3472 | prom_close_stdin(); |
3473 | |
3474 | /* |
3475 | * Call OF "quiesce" method to shut down pending DMA's from |
3476 | * devices etc... |
3477 | */ |
3478 | prom_printf(format: "Quiescing Open Firmware ...\n" ); |
3479 | call_prom(service: "quiesce" , nargs: 0, nret: 0); |
3480 | |
3481 | /* |
3482 | * And finally, call the kernel passing it the flattened device |
3483 | * tree and NULL as r5, thus triggering the new entry point which |
3484 | * is common to us and kexec |
3485 | */ |
3486 | hdr = dt_header_start; |
3487 | |
3488 | prom_printf(format: "Booting Linux via __start() @ 0x%lx ...\n" , kbase); |
3489 | prom_debug("->dt_header_start=0x%lx\n" , hdr); |
3490 | |
3491 | #ifdef CONFIG_PPC32 |
3492 | reloc_got2(-offset); |
3493 | #endif |
3494 | |
3495 | /* Move to secure memory if we're supposed to be secure guests. */ |
3496 | setup_secure_guest(kbase, fdt: hdr); |
3497 | |
3498 | __start(r3: hdr, r4: kbase, r5: 0, r6: 0, r7: 0, r8: 0, r9: 0); |
3499 | |
3500 | return 0; |
3501 | } |
3502 | |