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1 | /* |
2 | * Extensible Firmware Interface |
3 | * |
4 | * Based on Extensible Firmware Interface Specification version 0.9 |
5 | * April 30, 1999 |
6 | * |
7 | * Copyright (C) 1999 VA Linux Systems |
8 | * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> |
9 | * Copyright (C) 1999-2003 Hewlett-Packard Co. |
10 | * David Mosberger-Tang <davidm@hpl.hp.com> |
11 | * Stephane Eranian <eranian@hpl.hp.com> |
12 | * (c) Copyright 2006 Hewlett-Packard Development Company, L.P. |
13 | * Bjorn Helgaas <bjorn.helgaas@hp.com> |
14 | * |
15 | * All EFI Runtime Services are not implemented yet as EFI only |
16 | * supports physical mode addressing on SoftSDV. This is to be fixed |
17 | * in a future version. --drummond 1999-07-20 |
18 | * |
19 | * Implemented EFI runtime services and virtual mode calls. --davidm |
20 | * |
21 | * Goutham Rao: <goutham.rao@intel.com> |
22 | * Skip non-WB memory and ignore empty memory ranges. |
23 | */ |
24 | #include <linux/module.h> |
25 | #include <linux/bootmem.h> |
26 | #include <linux/kernel.h> |
27 | #include <linux/init.h> |
28 | #include <linux/types.h> |
29 | #include <linux/slab.h> |
30 | #include <linux/time.h> |
31 | #include <linux/efi.h> |
32 | #include <linux/kexec.h> |
33 | #include <linux/mm.h> |
34 | |
35 | #include <asm/io.h> |
36 | #include <asm/kregs.h> |
37 | #include <asm/meminit.h> |
38 | #include <asm/pgtable.h> |
39 | #include <asm/processor.h> |
40 | #include <asm/mca.h> |
41 | #include <asm/tlbflush.h> |
42 | |
43 | #define EFI_DEBUG 0 |
44 | |
45 | extern efi_status_t efi_call_phys (void *, ...); |
46 | |
47 | struct efi efi; |
48 | EXPORT_SYMBOL(efi); |
49 | static efi_runtime_services_t *runtime; |
50 | static u64 mem_limit = ~0UL, max_addr = ~0UL, min_addr = 0UL; |
51 | |
52 | #define efi_call_virt(f, args...) (*(f))(args) |
53 | |
54 | #define STUB_GET_TIME(prefix, adjust_arg) \ |
55 | static efi_status_t \ |
56 | prefix##_get_time (efi_time_t *tm, efi_time_cap_t *tc) \ |
57 | { \ |
58 | struct ia64_fpreg fr[6]; \ |
59 | efi_time_cap_t *atc = NULL; \ |
60 | efi_status_t ret; \ |
61 | \ |
62 | if (tc) \ |
63 | atc = adjust_arg(tc); \ |
64 | ia64_save_scratch_fpregs(fr); \ |
65 | ret = efi_call_##prefix((efi_get_time_t *) __va(runtime->get_time), \ |
66 | adjust_arg(tm), atc); \ |
67 | ia64_load_scratch_fpregs(fr); \ |
68 | return ret; \ |
69 | } |
70 | |
71 | #define STUB_SET_TIME(prefix, adjust_arg) \ |
72 | static efi_status_t \ |
73 | prefix##_set_time (efi_time_t *tm) \ |
74 | { \ |
75 | struct ia64_fpreg fr[6]; \ |
76 | efi_status_t ret; \ |
77 | \ |
78 | ia64_save_scratch_fpregs(fr); \ |
79 | ret = efi_call_##prefix((efi_set_time_t *) __va(runtime->set_time), \ |
80 | adjust_arg(tm)); \ |
81 | ia64_load_scratch_fpregs(fr); \ |
82 | return ret; \ |
83 | } |
84 | |
85 | #define STUB_GET_WAKEUP_TIME(prefix, adjust_arg) \ |
86 | static efi_status_t \ |
87 | prefix##_get_wakeup_time (efi_bool_t *enabled, efi_bool_t *pending, \ |
88 | efi_time_t *tm) \ |
89 | { \ |
90 | struct ia64_fpreg fr[6]; \ |
91 | efi_status_t ret; \ |
92 | \ |
93 | ia64_save_scratch_fpregs(fr); \ |
94 | ret = efi_call_##prefix( \ |
95 | (efi_get_wakeup_time_t *) __va(runtime->get_wakeup_time), \ |
96 | adjust_arg(enabled), adjust_arg(pending), adjust_arg(tm)); \ |
97 | ia64_load_scratch_fpregs(fr); \ |
98 | return ret; \ |
99 | } |
100 | |
101 | #define STUB_SET_WAKEUP_TIME(prefix, adjust_arg) \ |
102 | static efi_status_t \ |
103 | prefix##_set_wakeup_time (efi_bool_t enabled, efi_time_t *tm) \ |
104 | { \ |
105 | struct ia64_fpreg fr[6]; \ |
106 | efi_time_t *atm = NULL; \ |
107 | efi_status_t ret; \ |
108 | \ |
109 | if (tm) \ |
110 | atm = adjust_arg(tm); \ |
111 | ia64_save_scratch_fpregs(fr); \ |
112 | ret = efi_call_##prefix( \ |
113 | (efi_set_wakeup_time_t *) __va(runtime->set_wakeup_time), \ |
114 | enabled, atm); \ |
115 | ia64_load_scratch_fpregs(fr); \ |
116 | return ret; \ |
117 | } |
118 | |
119 | #define STUB_GET_VARIABLE(prefix, adjust_arg) \ |
120 | static efi_status_t \ |
121 | prefix##_get_variable (efi_char16_t *name, efi_guid_t *vendor, u32 *attr, \ |
122 | unsigned long *data_size, void *data) \ |
123 | { \ |
124 | struct ia64_fpreg fr[6]; \ |
125 | u32 *aattr = NULL; \ |
126 | efi_status_t ret; \ |
127 | \ |
128 | if (attr) \ |
129 | aattr = adjust_arg(attr); \ |
130 | ia64_save_scratch_fpregs(fr); \ |
131 | ret = efi_call_##prefix( \ |
132 | (efi_get_variable_t *) __va(runtime->get_variable), \ |
133 | adjust_arg(name), adjust_arg(vendor), aattr, \ |
134 | adjust_arg(data_size), adjust_arg(data)); \ |
135 | ia64_load_scratch_fpregs(fr); \ |
136 | return ret; \ |
137 | } |
138 | |
139 | #define STUB_GET_NEXT_VARIABLE(prefix, adjust_arg) \ |
140 | static efi_status_t \ |
141 | prefix##_get_next_variable (unsigned long *name_size, efi_char16_t *name, \ |
142 | efi_guid_t *vendor) \ |
143 | { \ |
144 | struct ia64_fpreg fr[6]; \ |
145 | efi_status_t ret; \ |
146 | \ |
147 | ia64_save_scratch_fpregs(fr); \ |
148 | ret = efi_call_##prefix( \ |
149 | (efi_get_next_variable_t *) __va(runtime->get_next_variable), \ |
150 | adjust_arg(name_size), adjust_arg(name), adjust_arg(vendor)); \ |
151 | ia64_load_scratch_fpregs(fr); \ |
152 | return ret; \ |
153 | } |
154 | |
155 | #define STUB_SET_VARIABLE(prefix, adjust_arg) \ |
156 | static efi_status_t \ |
157 | prefix##_set_variable (efi_char16_t *name, efi_guid_t *vendor, \ |
158 | unsigned long attr, unsigned long data_size, \ |
159 | void *data) \ |
160 | { \ |
161 | struct ia64_fpreg fr[6]; \ |
162 | efi_status_t ret; \ |
163 | \ |
164 | ia64_save_scratch_fpregs(fr); \ |
165 | ret = efi_call_##prefix( \ |
166 | (efi_set_variable_t *) __va(runtime->set_variable), \ |
167 | adjust_arg(name), adjust_arg(vendor), attr, data_size, \ |
168 | adjust_arg(data)); \ |
169 | ia64_load_scratch_fpregs(fr); \ |
170 | return ret; \ |
171 | } |
172 | |
173 | #define STUB_GET_NEXT_HIGH_MONO_COUNT(prefix, adjust_arg) \ |
174 | static efi_status_t \ |
175 | prefix##_get_next_high_mono_count (u32 *count) \ |
176 | { \ |
177 | struct ia64_fpreg fr[6]; \ |
178 | efi_status_t ret; \ |
179 | \ |
180 | ia64_save_scratch_fpregs(fr); \ |
181 | ret = efi_call_##prefix((efi_get_next_high_mono_count_t *) \ |
182 | __va(runtime->get_next_high_mono_count), \ |
183 | adjust_arg(count)); \ |
184 | ia64_load_scratch_fpregs(fr); \ |
185 | return ret; \ |
186 | } |
187 | |
188 | #define STUB_RESET_SYSTEM(prefix, adjust_arg) \ |
189 | static void \ |
190 | prefix##_reset_system (int reset_type, efi_status_t status, \ |
191 | unsigned long data_size, efi_char16_t *data) \ |
192 | { \ |
193 | struct ia64_fpreg fr[6]; \ |
194 | efi_char16_t *adata = NULL; \ |
195 | \ |
196 | if (data) \ |
197 | adata = adjust_arg(data); \ |
198 | \ |
199 | ia64_save_scratch_fpregs(fr); \ |
200 | efi_call_##prefix( \ |
201 | (efi_reset_system_t *) __va(runtime->reset_system), \ |
202 | reset_type, status, data_size, adata); \ |
203 | /* should not return, but just in case... */ \ |
204 | ia64_load_scratch_fpregs(fr); \ |
205 | } |
206 | |
207 | #define phys_ptr(arg) ((__typeof__(arg)) ia64_tpa(arg)) |
208 | |
209 | STUB_GET_TIME(phys, phys_ptr) |
210 | STUB_SET_TIME(phys, phys_ptr) |
211 | STUB_GET_WAKEUP_TIME(phys, phys_ptr) |
212 | STUB_SET_WAKEUP_TIME(phys, phys_ptr) |
213 | STUB_GET_VARIABLE(phys, phys_ptr) |
214 | STUB_GET_NEXT_VARIABLE(phys, phys_ptr) |
215 | STUB_SET_VARIABLE(phys, phys_ptr) |
216 | STUB_GET_NEXT_HIGH_MONO_COUNT(phys, phys_ptr) |
217 | STUB_RESET_SYSTEM(phys, phys_ptr) |
218 | |
219 | #define id(arg) arg |
220 | |
221 | STUB_GET_TIME(virt, id) |
222 | STUB_SET_TIME(virt, id) |
223 | STUB_GET_WAKEUP_TIME(virt, id) |
224 | STUB_SET_WAKEUP_TIME(virt, id) |
225 | STUB_GET_VARIABLE(virt, id) |
226 | STUB_GET_NEXT_VARIABLE(virt, id) |
227 | STUB_SET_VARIABLE(virt, id) |
228 | STUB_GET_NEXT_HIGH_MONO_COUNT(virt, id) |
229 | STUB_RESET_SYSTEM(virt, id) |
230 | |
231 | void |
232 | efi_gettimeofday (struct timespec *ts) |
233 | { |
234 | efi_time_t tm; |
235 | |
236 | if ((*efi.get_time)(&tm, NULL) != EFI_SUCCESS) { |
237 | memset(ts, 0, sizeof(*ts)); |
238 | return; |
239 | } |
240 | |
241 | ts->tv_sec = mktime(tm.year, tm.month, tm.day, |
242 | tm.hour, tm.minute, tm.second); |
243 | ts->tv_nsec = tm.nanosecond; |
244 | } |
245 | |
246 | static int |
247 | is_memory_available (efi_memory_desc_t *md) |
248 | { |
249 | if (!(md->attribute & EFI_MEMORY_WB)) |
250 | return 0; |
251 | |
252 | switch (md->type) { |
253 | case EFI_LOADER_CODE: |
254 | case EFI_LOADER_DATA: |
255 | case EFI_BOOT_SERVICES_CODE: |
256 | case EFI_BOOT_SERVICES_DATA: |
257 | case EFI_CONVENTIONAL_MEMORY: |
258 | return 1; |
259 | } |
260 | return 0; |
261 | } |
262 | |
263 | typedef struct kern_memdesc { |
264 | u64 attribute; |
265 | u64 start; |
266 | u64 num_pages; |
267 | } kern_memdesc_t; |
268 | |
269 | static kern_memdesc_t *kern_memmap; |
270 | |
271 | #define efi_md_size(md) (md->num_pages << EFI_PAGE_SHIFT) |
272 | |
273 | static inline u64 |
274 | kmd_end(kern_memdesc_t *kmd) |
275 | { |
276 | return (kmd->start + (kmd->num_pages << EFI_PAGE_SHIFT)); |
277 | } |
278 | |
279 | static inline u64 |
280 | efi_md_end(efi_memory_desc_t *md) |
281 | { |
282 | return (md->phys_addr + efi_md_size(md)); |
283 | } |
284 | |
285 | static inline int |
286 | efi_wb(efi_memory_desc_t *md) |
287 | { |
288 | return (md->attribute & EFI_MEMORY_WB); |
289 | } |
290 | |
291 | static inline int |
292 | efi_uc(efi_memory_desc_t *md) |
293 | { |
294 | return (md->attribute & EFI_MEMORY_UC); |
295 | } |
296 | |
297 | static void |
298 | walk (efi_freemem_callback_t callback, void *arg, u64 attr) |
299 | { |
300 | kern_memdesc_t *k; |
301 | u64 start, end, voff; |
302 | |
303 | voff = (attr == EFI_MEMORY_WB) ? PAGE_OFFSET : __IA64_UNCACHED_OFFSET; |
304 | for (k = kern_memmap; k->start != ~0UL; k++) { |
305 | if (k->attribute != attr) |
306 | continue; |
307 | start = PAGE_ALIGN(k->start); |
308 | end = (k->start + (k->num_pages << EFI_PAGE_SHIFT)) & PAGE_MASK; |
309 | if (start < end) |
310 | if ((*callback)(start + voff, end + voff, arg) < 0) |
311 | return; |
312 | } |
313 | } |
314 | |
315 | /* |
316 | * Walk the EFI memory map and call CALLBACK once for each EFI memory |
317 | * descriptor that has memory that is available for OS use. |
318 | */ |
319 | void |
320 | efi_memmap_walk (efi_freemem_callback_t callback, void *arg) |
321 | { |
322 | walk(callback, arg, EFI_MEMORY_WB); |
323 | } |
324 | |
325 | /* |
326 | * Walk the EFI memory map and call CALLBACK once for each EFI memory |
327 | * descriptor that has memory that is available for uncached allocator. |
328 | */ |
329 | void |
330 | efi_memmap_walk_uc (efi_freemem_callback_t callback, void *arg) |
331 | { |
332 | walk(callback, arg, EFI_MEMORY_UC); |
333 | } |
334 | |
335 | /* |
336 | * Look for the PAL_CODE region reported by EFI and map it using an |
337 | * ITR to enable safe PAL calls in virtual mode. See IA-64 Processor |
338 | * Abstraction Layer chapter 11 in ADAG |
339 | */ |
340 | void * |
341 | efi_get_pal_addr (void) |
342 | { |
343 | void *efi_map_start, *efi_map_end, *p; |
344 | efi_memory_desc_t *md; |
345 | u64 efi_desc_size; |
346 | int pal_code_count = 0; |
347 | u64 vaddr, mask; |
348 | |
349 | efi_map_start = __va(ia64_boot_param->efi_memmap); |
350 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; |
351 | efi_desc_size = ia64_boot_param->efi_memdesc_size; |
352 | |
353 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { |
354 | md = p; |
355 | if (md->type != EFI_PAL_CODE) |
356 | continue; |
357 | |
358 | if (++pal_code_count > 1) { |
359 | printk(KERN_ERR "Too many EFI Pal Code memory ranges, " |
360 | "dropped @ %llx\n", md->phys_addr); |
361 | continue; |
362 | } |
363 | /* |
364 | * The only ITLB entry in region 7 that is used is the one |
365 | * installed by __start(). That entry covers a 64MB range. |
366 | */ |
367 | mask = ~((1 << KERNEL_TR_PAGE_SHIFT) - 1); |
368 | vaddr = PAGE_OFFSET + md->phys_addr; |
369 | |
370 | /* |
371 | * We must check that the PAL mapping won't overlap with the |
372 | * kernel mapping. |
373 | * |
374 | * PAL code is guaranteed to be aligned on a power of 2 between |
375 | * 4k and 256KB and that only one ITR is needed to map it. This |
376 | * implies that the PAL code is always aligned on its size, |
377 | * i.e., the closest matching page size supported by the TLB. |
378 | * Therefore PAL code is guaranteed never to cross a 64MB unless |
379 | * it is bigger than 64MB (very unlikely!). So for now the |
380 | * following test is enough to determine whether or not we need |
381 | * a dedicated ITR for the PAL code. |
382 | */ |
383 | if ((vaddr & mask) == (KERNEL_START & mask)) { |
384 | printk(KERN_INFO "%s: no need to install ITR for PAL code\n", |
385 | __func__); |
386 | continue; |
387 | } |
388 | |
389 | if (efi_md_size(md) > IA64_GRANULE_SIZE) |
390 | panic("Whoa! PAL code size bigger than a granule!"); |
391 | |
392 | #if EFI_DEBUG |
393 | mask = ~((1 << IA64_GRANULE_SHIFT) - 1); |
394 | |
395 | printk(KERN_INFO "CPU %d: mapping PAL code " |
396 | "[0x%lx-0x%lx) into [0x%lx-0x%lx)\n", |
397 | smp_processor_id(), md->phys_addr, |
398 | md->phys_addr + efi_md_size(md), |
399 | vaddr & mask, (vaddr & mask) + IA64_GRANULE_SIZE); |
400 | #endif |
401 | return __va(md->phys_addr); |
402 | } |
403 | printk(KERN_WARNING "%s: no PAL-code memory-descriptor found\n", |
404 | __func__); |
405 | return NULL; |
406 | } |
407 | |
408 | |
409 | static u8 __init palo_checksum(u8 *buffer, u32 length) |
410 | { |
411 | u8 sum = 0; |
412 | u8 *end = buffer + length; |
413 | |
414 | while (buffer < end) |
415 | sum = (u8) (sum + *(buffer++)); |
416 | |
417 | return sum; |
418 | } |
419 | |
420 | /* |
421 | * Parse and handle PALO table which is published at: |
422 | * http://www.dig64.org/home/DIG64_PALO_R1_0.pdf |
423 | */ |
424 | static void __init handle_palo(unsigned long palo_phys) |
425 | { |
426 | struct palo_table *palo = __va(palo_phys); |
427 | u8 checksum; |
428 | |
429 | if (strncmp(palo->signature, PALO_SIG, sizeof(PALO_SIG) - 1)) { |
430 | printk(KERN_INFO "PALO signature incorrect.\n"); |
431 | return; |
432 | } |
433 | |
434 | checksum = palo_checksum((u8 *)palo, palo->length); |
435 | if (checksum) { |
436 | printk(KERN_INFO "PALO checksum incorrect.\n"); |
437 | return; |
438 | } |
439 | |
440 | setup_ptcg_sem(palo->max_tlb_purges, NPTCG_FROM_PALO); |
441 | } |
442 | |
443 | void |
444 | efi_map_pal_code (void) |
445 | { |
446 | void *pal_vaddr = efi_get_pal_addr (); |
447 | u64 psr; |
448 | |
449 | if (!pal_vaddr) |
450 | return; |
451 | |
452 | /* |
453 | * Cannot write to CRx with PSR.ic=1 |
454 | */ |
455 | psr = ia64_clear_ic(); |
456 | ia64_itr(0x1, IA64_TR_PALCODE, |
457 | GRANULEROUNDDOWN((unsigned long) pal_vaddr), |
458 | pte_val(pfn_pte(__pa(pal_vaddr) >> PAGE_SHIFT, PAGE_KERNEL)), |
459 | IA64_GRANULE_SHIFT); |
460 | paravirt_dv_serialize_data(); |
461 | ia64_set_psr(psr); /* restore psr */ |
462 | } |
463 | |
464 | void __init |
465 | efi_init (void) |
466 | { |
467 | void *efi_map_start, *efi_map_end; |
468 | efi_config_table_t *config_tables; |
469 | efi_char16_t *c16; |
470 | u64 efi_desc_size; |
471 | char *cp, vendor[100] = "unknown"; |
472 | int i; |
473 | unsigned long palo_phys; |
474 | |
475 | /* |
476 | * It's too early to be able to use the standard kernel command line |
477 | * support... |
478 | */ |
479 | for (cp = boot_command_line; *cp; ) { |
480 | if (memcmp(cp, "mem=", 4) == 0) { |
481 | mem_limit = memparse(cp + 4, &cp); |
482 | } else if (memcmp(cp, "max_addr=", 9) == 0) { |
483 | max_addr = GRANULEROUNDDOWN(memparse(cp + 9, &cp)); |
484 | } else if (memcmp(cp, "min_addr=", 9) == 0) { |
485 | min_addr = GRANULEROUNDDOWN(memparse(cp + 9, &cp)); |
486 | } else { |
487 | while (*cp != ' ' && *cp) |
488 | ++cp; |
489 | while (*cp == ' ') |
490 | ++cp; |
491 | } |
492 | } |
493 | if (min_addr != 0UL) |
494 | printk(KERN_INFO "Ignoring memory below %lluMB\n", |
495 | min_addr >> 20); |
496 | if (max_addr != ~0UL) |
497 | printk(KERN_INFO "Ignoring memory above %lluMB\n", |
498 | max_addr >> 20); |
499 | |
500 | efi.systab = __va(ia64_boot_param->efi_systab); |
501 | |
502 | /* |
503 | * Verify the EFI Table |
504 | */ |
505 | if (efi.systab == NULL) |
506 | panic("Whoa! Can't find EFI system table.\n"); |
507 | if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) |
508 | panic("Whoa! EFI system table signature incorrect\n"); |
509 | if ((efi.systab->hdr.revision >> 16) == 0) |
510 | printk(KERN_WARNING "Warning: EFI system table version " |
511 | "%d.%02d, expected 1.00 or greater\n", |
512 | efi.systab->hdr.revision >> 16, |
513 | efi.systab->hdr.revision & 0xffff); |
514 | |
515 | config_tables = __va(efi.systab->tables); |
516 | |
517 | /* Show what we know for posterity */ |
518 | c16 = __va(efi.systab->fw_vendor); |
519 | if (c16) { |
520 | for (i = 0;i < (int) sizeof(vendor) - 1 && *c16; ++i) |
521 | vendor[i] = *c16++; |
522 | vendor[i] = '\0'; |
523 | } |
524 | |
525 | printk(KERN_INFO "EFI v%u.%.02u by %s:", |
526 | efi.systab->hdr.revision >> 16, |
527 | efi.systab->hdr.revision & 0xffff, vendor); |
528 | |
529 | efi.mps = EFI_INVALID_TABLE_ADDR; |
530 | efi.acpi = EFI_INVALID_TABLE_ADDR; |
531 | efi.acpi20 = EFI_INVALID_TABLE_ADDR; |
532 | efi.smbios = EFI_INVALID_TABLE_ADDR; |
533 | efi.sal_systab = EFI_INVALID_TABLE_ADDR; |
534 | efi.boot_info = EFI_INVALID_TABLE_ADDR; |
535 | efi.hcdp = EFI_INVALID_TABLE_ADDR; |
536 | efi.uga = EFI_INVALID_TABLE_ADDR; |
537 | |
538 | palo_phys = EFI_INVALID_TABLE_ADDR; |
539 | |
540 | for (i = 0; i < (int) efi.systab->nr_tables; i++) { |
541 | if (efi_guidcmp(config_tables[i].guid, MPS_TABLE_GUID) == 0) { |
542 | efi.mps = config_tables[i].table; |
543 | printk(" MPS=0x%lx", config_tables[i].table); |
544 | } else if (efi_guidcmp(config_tables[i].guid, ACPI_20_TABLE_GUID) == 0) { |
545 | efi.acpi20 = config_tables[i].table; |
546 | printk(" ACPI 2.0=0x%lx", config_tables[i].table); |
547 | } else if (efi_guidcmp(config_tables[i].guid, ACPI_TABLE_GUID) == 0) { |
548 | efi.acpi = config_tables[i].table; |
549 | printk(" ACPI=0x%lx", config_tables[i].table); |
550 | } else if (efi_guidcmp(config_tables[i].guid, SMBIOS_TABLE_GUID) == 0) { |
551 | efi.smbios = config_tables[i].table; |
552 | printk(" SMBIOS=0x%lx", config_tables[i].table); |
553 | } else if (efi_guidcmp(config_tables[i].guid, SAL_SYSTEM_TABLE_GUID) == 0) { |
554 | efi.sal_systab = config_tables[i].table; |
555 | printk(" SALsystab=0x%lx", config_tables[i].table); |
556 | } else if (efi_guidcmp(config_tables[i].guid, HCDP_TABLE_GUID) == 0) { |
557 | efi.hcdp = config_tables[i].table; |
558 | printk(" HCDP=0x%lx", config_tables[i].table); |
559 | } else if (efi_guidcmp(config_tables[i].guid, |
560 | PROCESSOR_ABSTRACTION_LAYER_OVERWRITE_GUID) == 0) { |
561 | palo_phys = config_tables[i].table; |
562 | printk(" PALO=0x%lx", config_tables[i].table); |
563 | } |
564 | } |
565 | printk("\n"); |
566 | |
567 | if (palo_phys != EFI_INVALID_TABLE_ADDR) |
568 | handle_palo(palo_phys); |
569 | |
570 | runtime = __va(efi.systab->runtime); |
571 | efi.get_time = phys_get_time; |
572 | efi.set_time = phys_set_time; |
573 | efi.get_wakeup_time = phys_get_wakeup_time; |
574 | efi.set_wakeup_time = phys_set_wakeup_time; |
575 | efi.get_variable = phys_get_variable; |
576 | efi.get_next_variable = phys_get_next_variable; |
577 | efi.set_variable = phys_set_variable; |
578 | efi.get_next_high_mono_count = phys_get_next_high_mono_count; |
579 | efi.reset_system = phys_reset_system; |
580 | |
581 | efi_map_start = __va(ia64_boot_param->efi_memmap); |
582 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; |
583 | efi_desc_size = ia64_boot_param->efi_memdesc_size; |
584 | |
585 | #if EFI_DEBUG |
586 | /* print EFI memory map: */ |
587 | { |
588 | efi_memory_desc_t *md; |
589 | void *p; |
590 | |
591 | for (i = 0, p = efi_map_start; p < efi_map_end; |
592 | ++i, p += efi_desc_size) |
593 | { |
594 | const char *unit; |
595 | unsigned long size; |
596 | |
597 | md = p; |
598 | size = md->num_pages << EFI_PAGE_SHIFT; |
599 | |
600 | if ((size >> 40) > 0) { |
601 | size >>= 40; |
602 | unit = "TB"; |
603 | } else if ((size >> 30) > 0) { |
604 | size >>= 30; |
605 | unit = "GB"; |
606 | } else if ((size >> 20) > 0) { |
607 | size >>= 20; |
608 | unit = "MB"; |
609 | } else { |
610 | size >>= 10; |
611 | unit = "KB"; |
612 | } |
613 | |
614 | printk("mem%02d: type=%2u, attr=0x%016lx, " |
615 | "range=[0x%016lx-0x%016lx) (%4lu%s)\n", |
616 | i, md->type, md->attribute, md->phys_addr, |
617 | md->phys_addr + efi_md_size(md), size, unit); |
618 | } |
619 | } |
620 | #endif |
621 | |
622 | efi_map_pal_code(); |
623 | efi_enter_virtual_mode(); |
624 | } |
625 | |
626 | void |
627 | efi_enter_virtual_mode (void) |
628 | { |
629 | void *efi_map_start, *efi_map_end, *p; |
630 | efi_memory_desc_t *md; |
631 | efi_status_t status; |
632 | u64 efi_desc_size; |
633 | |
634 | efi_map_start = __va(ia64_boot_param->efi_memmap); |
635 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; |
636 | efi_desc_size = ia64_boot_param->efi_memdesc_size; |
637 | |
638 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { |
639 | md = p; |
640 | if (md->attribute & EFI_MEMORY_RUNTIME) { |
641 | /* |
642 | * Some descriptors have multiple bits set, so the |
643 | * order of the tests is relevant. |
644 | */ |
645 | if (md->attribute & EFI_MEMORY_WB) { |
646 | md->virt_addr = (u64) __va(md->phys_addr); |
647 | } else if (md->attribute & EFI_MEMORY_UC) { |
648 | md->virt_addr = (u64) ioremap(md->phys_addr, 0); |
649 | } else if (md->attribute & EFI_MEMORY_WC) { |
650 | #if 0 |
651 | md->virt_addr = ia64_remap(md->phys_addr, |
652 | (_PAGE_A | |
653 | _PAGE_P | |
654 | _PAGE_D | |
655 | _PAGE_MA_WC | |
656 | _PAGE_PL_0 | |
657 | _PAGE_AR_RW)); |
658 | #else |
659 | printk(KERN_INFO "EFI_MEMORY_WC mapping\n"); |
660 | md->virt_addr = (u64) ioremap(md->phys_addr, 0); |
661 | #endif |
662 | } else if (md->attribute & EFI_MEMORY_WT) { |
663 | #if 0 |
664 | md->virt_addr = ia64_remap(md->phys_addr, |
665 | (_PAGE_A | |
666 | _PAGE_P | |
667 | _PAGE_D | |
668 | _PAGE_MA_WT | |
669 | _PAGE_PL_0 | |
670 | _PAGE_AR_RW)); |
671 | #else |
672 | printk(KERN_INFO "EFI_MEMORY_WT mapping\n"); |
673 | md->virt_addr = (u64) ioremap(md->phys_addr, 0); |
674 | #endif |
675 | } |
676 | } |
677 | } |
678 | |
679 | status = efi_call_phys(__va(runtime->set_virtual_address_map), |
680 | ia64_boot_param->efi_memmap_size, |
681 | efi_desc_size, |
682 | ia64_boot_param->efi_memdesc_version, |
683 | ia64_boot_param->efi_memmap); |
684 | if (status != EFI_SUCCESS) { |
685 | printk(KERN_WARNING "warning: unable to switch EFI into " |
686 | "virtual mode (status=%lu)\n", status); |
687 | return; |
688 | } |
689 | |
690 | /* |
691 | * Now that EFI is in virtual mode, we call the EFI functions more |
692 | * efficiently: |
693 | */ |
694 | efi.get_time = virt_get_time; |
695 | efi.set_time = virt_set_time; |
696 | efi.get_wakeup_time = virt_get_wakeup_time; |
697 | efi.set_wakeup_time = virt_set_wakeup_time; |
698 | efi.get_variable = virt_get_variable; |
699 | efi.get_next_variable = virt_get_next_variable; |
700 | efi.set_variable = virt_set_variable; |
701 | efi.get_next_high_mono_count = virt_get_next_high_mono_count; |
702 | efi.reset_system = virt_reset_system; |
703 | } |
704 | |
705 | /* |
706 | * Walk the EFI memory map looking for the I/O port range. There can only be |
707 | * one entry of this type, other I/O port ranges should be described via ACPI. |
708 | */ |
709 | u64 |
710 | efi_get_iobase (void) |
711 | { |
712 | void *efi_map_start, *efi_map_end, *p; |
713 | efi_memory_desc_t *md; |
714 | u64 efi_desc_size; |
715 | |
716 | efi_map_start = __va(ia64_boot_param->efi_memmap); |
717 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; |
718 | efi_desc_size = ia64_boot_param->efi_memdesc_size; |
719 | |
720 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { |
721 | md = p; |
722 | if (md->type == EFI_MEMORY_MAPPED_IO_PORT_SPACE) { |
723 | if (md->attribute & EFI_MEMORY_UC) |
724 | return md->phys_addr; |
725 | } |
726 | } |
727 | return 0; |
728 | } |
729 | |
730 | static struct kern_memdesc * |
731 | kern_memory_descriptor (unsigned long phys_addr) |
732 | { |
733 | struct kern_memdesc *md; |
734 | |
735 | for (md = kern_memmap; md->start != ~0UL; md++) { |
736 | if (phys_addr - md->start < (md->num_pages << EFI_PAGE_SHIFT)) |
737 | return md; |
738 | } |
739 | return NULL; |
740 | } |
741 | |
742 | static efi_memory_desc_t * |
743 | efi_memory_descriptor (unsigned long phys_addr) |
744 | { |
745 | void *efi_map_start, *efi_map_end, *p; |
746 | efi_memory_desc_t *md; |
747 | u64 efi_desc_size; |
748 | |
749 | efi_map_start = __va(ia64_boot_param->efi_memmap); |
750 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; |
751 | efi_desc_size = ia64_boot_param->efi_memdesc_size; |
752 | |
753 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { |
754 | md = p; |
755 | |
756 | if (phys_addr - md->phys_addr < efi_md_size(md)) |
757 | return md; |
758 | } |
759 | return NULL; |
760 | } |
761 | |
762 | static int |
763 | efi_memmap_intersects (unsigned long phys_addr, unsigned long size) |
764 | { |
765 | void *efi_map_start, *efi_map_end, *p; |
766 | efi_memory_desc_t *md; |
767 | u64 efi_desc_size; |
768 | unsigned long end; |
769 | |
770 | efi_map_start = __va(ia64_boot_param->efi_memmap); |
771 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; |
772 | efi_desc_size = ia64_boot_param->efi_memdesc_size; |
773 | |
774 | end = phys_addr + size; |
775 | |
776 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { |
777 | md = p; |
778 | if (md->phys_addr < end && efi_md_end(md) > phys_addr) |
779 | return 1; |
780 | } |
781 | return 0; |
782 | } |
783 | |
784 | u32 |
785 | efi_mem_type (unsigned long phys_addr) |
786 | { |
787 | efi_memory_desc_t *md = efi_memory_descriptor(phys_addr); |
788 | |
789 | if (md) |
790 | return md->type; |
791 | return 0; |
792 | } |
793 | |
794 | u64 |
795 | efi_mem_attributes (unsigned long phys_addr) |
796 | { |
797 | efi_memory_desc_t *md = efi_memory_descriptor(phys_addr); |
798 | |
799 | if (md) |
800 | return md->attribute; |
801 | return 0; |
802 | } |
803 | EXPORT_SYMBOL(efi_mem_attributes); |
804 | |
805 | u64 |
806 | efi_mem_attribute (unsigned long phys_addr, unsigned long size) |
807 | { |
808 | unsigned long end = phys_addr + size; |
809 | efi_memory_desc_t *md = efi_memory_descriptor(phys_addr); |
810 | u64 attr; |
811 | |
812 | if (!md) |
813 | return 0; |
814 | |
815 | /* |
816 | * EFI_MEMORY_RUNTIME is not a memory attribute; it just tells |
817 | * the kernel that firmware needs this region mapped. |
818 | */ |
819 | attr = md->attribute & ~EFI_MEMORY_RUNTIME; |
820 | do { |
821 | unsigned long md_end = efi_md_end(md); |
822 | |
823 | if (end <= md_end) |
824 | return attr; |
825 | |
826 | md = efi_memory_descriptor(md_end); |
827 | if (!md || (md->attribute & ~EFI_MEMORY_RUNTIME) != attr) |
828 | return 0; |
829 | } while (md); |
830 | return 0; /* never reached */ |
831 | } |
832 | |
833 | u64 |
834 | kern_mem_attribute (unsigned long phys_addr, unsigned long size) |
835 | { |
836 | unsigned long end = phys_addr + size; |
837 | struct kern_memdesc *md; |
838 | u64 attr; |
839 | |
840 | /* |
841 | * This is a hack for ioremap calls before we set up kern_memmap. |
842 | * Maybe we should do efi_memmap_init() earlier instead. |
843 | */ |
844 | if (!kern_memmap) { |
845 | attr = efi_mem_attribute(phys_addr, size); |
846 | if (attr & EFI_MEMORY_WB) |
847 | return EFI_MEMORY_WB; |
848 | return 0; |
849 | } |
850 | |
851 | md = kern_memory_descriptor(phys_addr); |
852 | if (!md) |
853 | return 0; |
854 | |
855 | attr = md->attribute; |
856 | do { |
857 | unsigned long md_end = kmd_end(md); |
858 | |
859 | if (end <= md_end) |
860 | return attr; |
861 | |
862 | md = kern_memory_descriptor(md_end); |
863 | if (!md || md->attribute != attr) |
864 | return 0; |
865 | } while (md); |
866 | return 0; /* never reached */ |
867 | } |
868 | EXPORT_SYMBOL(kern_mem_attribute); |
869 | |
870 | int |
871 | valid_phys_addr_range (unsigned long phys_addr, unsigned long size) |
872 | { |
873 | u64 attr; |
874 | |
875 | /* |
876 | * /dev/mem reads and writes use copy_to_user(), which implicitly |
877 | * uses a granule-sized kernel identity mapping. It's really |
878 | * only safe to do this for regions in kern_memmap. For more |
879 | * details, see Documentation/ia64/aliasing.txt. |
880 | */ |
881 | attr = kern_mem_attribute(phys_addr, size); |
882 | if (attr & EFI_MEMORY_WB || attr & EFI_MEMORY_UC) |
883 | return 1; |
884 | return 0; |
885 | } |
886 | |
887 | int |
888 | valid_mmap_phys_addr_range (unsigned long pfn, unsigned long size) |
889 | { |
890 | unsigned long phys_addr = pfn << PAGE_SHIFT; |
891 | u64 attr; |
892 | |
893 | attr = efi_mem_attribute(phys_addr, size); |
894 | |
895 | /* |
896 | * /dev/mem mmap uses normal user pages, so we don't need the entire |
897 | * granule, but the entire region we're mapping must support the same |
898 | * attribute. |
899 | */ |
900 | if (attr & EFI_MEMORY_WB || attr & EFI_MEMORY_UC) |
901 | return 1; |
902 | |
903 | /* |
904 | * Intel firmware doesn't tell us about all the MMIO regions, so |
905 | * in general we have to allow mmap requests. But if EFI *does* |
906 | * tell us about anything inside this region, we should deny it. |
907 | * The user can always map a smaller region to avoid the overlap. |
908 | */ |
909 | if (efi_memmap_intersects(phys_addr, size)) |
910 | return 0; |
911 | |
912 | return 1; |
913 | } |
914 | |
915 | pgprot_t |
916 | phys_mem_access_prot(struct file *file, unsigned long pfn, unsigned long size, |
917 | pgprot_t vma_prot) |
918 | { |
919 | unsigned long phys_addr = pfn << PAGE_SHIFT; |
920 | u64 attr; |
921 | |
922 | /* |
923 | * For /dev/mem mmap, we use user mappings, but if the region is |
924 | * in kern_memmap (and hence may be covered by a kernel mapping), |
925 | * we must use the same attribute as the kernel mapping. |
926 | */ |
927 | attr = kern_mem_attribute(phys_addr, size); |
928 | if (attr & EFI_MEMORY_WB) |
929 | return pgprot_cacheable(vma_prot); |
930 | else if (attr & EFI_MEMORY_UC) |
931 | return pgprot_noncached(vma_prot); |
932 | |
933 | /* |
934 | * Some chipsets don't support UC access to memory. If |
935 | * WB is supported, we prefer that. |
936 | */ |
937 | if (efi_mem_attribute(phys_addr, size) & EFI_MEMORY_WB) |
938 | return pgprot_cacheable(vma_prot); |
939 | |
940 | return pgprot_noncached(vma_prot); |
941 | } |
942 | |
943 | int __init |
944 | efi_uart_console_only(void) |
945 | { |
946 | efi_status_t status; |
947 | char *s, name[] = "ConOut"; |
948 | efi_guid_t guid = EFI_GLOBAL_VARIABLE_GUID; |
949 | efi_char16_t *utf16, name_utf16[32]; |
950 | unsigned char data[1024]; |
951 | unsigned long size = sizeof(data); |
952 | struct efi_generic_dev_path *hdr, *end_addr; |
953 | int uart = 0; |
954 | |
955 | /* Convert to UTF-16 */ |
956 | utf16 = name_utf16; |
957 | s = name; |
958 | while (*s) |
959 | *utf16++ = *s++ & 0x7f; |
960 | *utf16 = 0; |
961 | |
962 | status = efi.get_variable(name_utf16, &guid, NULL, &size, data); |
963 | if (status != EFI_SUCCESS) { |
964 | printk(KERN_ERR "No EFI %s variable?\n", name); |
965 | return 0; |
966 | } |
967 | |
968 | hdr = (struct efi_generic_dev_path *) data; |
969 | end_addr = (struct efi_generic_dev_path *) ((u8 *) data + size); |
970 | while (hdr < end_addr) { |
971 | if (hdr->type == EFI_DEV_MSG && |
972 | hdr->sub_type == EFI_DEV_MSG_UART) |
973 | uart = 1; |
974 | else if (hdr->type == EFI_DEV_END_PATH || |
975 | hdr->type == EFI_DEV_END_PATH2) { |
976 | if (!uart) |
977 | return 0; |
978 | if (hdr->sub_type == EFI_DEV_END_ENTIRE) |
979 | return 1; |
980 | uart = 0; |
981 | } |
982 | hdr = (struct efi_generic_dev_path *)((u8 *) hdr + hdr->length); |
983 | } |
984 | printk(KERN_ERR "Malformed %s value\n", name); |
985 | return 0; |
986 | } |
987 | |
988 | /* |
989 | * Look for the first granule aligned memory descriptor memory |
990 | * that is big enough to hold EFI memory map. Make sure this |
991 | * descriptor is atleast granule sized so it does not get trimmed |
992 | */ |
993 | struct kern_memdesc * |
994 | find_memmap_space (void) |
995 | { |
996 | u64 contig_low=0, contig_high=0; |
997 | u64 as = 0, ae; |
998 | void *efi_map_start, *efi_map_end, *p, *q; |
999 | efi_memory_desc_t *md, *pmd = NULL, *check_md; |
1000 | u64 space_needed, efi_desc_size; |
1001 | unsigned long total_mem = 0; |
1002 | |
1003 | efi_map_start = __va(ia64_boot_param->efi_memmap); |
1004 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; |
1005 | efi_desc_size = ia64_boot_param->efi_memdesc_size; |
1006 | |
1007 | /* |
1008 | * Worst case: we need 3 kernel descriptors for each efi descriptor |
1009 | * (if every entry has a WB part in the middle, and UC head and tail), |
1010 | * plus one for the end marker. |
1011 | */ |
1012 | space_needed = sizeof(kern_memdesc_t) * |
1013 | (3 * (ia64_boot_param->efi_memmap_size/efi_desc_size) + 1); |
1014 | |
1015 | for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) { |
1016 | md = p; |
1017 | if (!efi_wb(md)) { |
1018 | continue; |
1019 | } |
1020 | if (pmd == NULL || !efi_wb(pmd) || |
1021 | efi_md_end(pmd) != md->phys_addr) { |
1022 | contig_low = GRANULEROUNDUP(md->phys_addr); |
1023 | contig_high = efi_md_end(md); |
1024 | for (q = p + efi_desc_size; q < efi_map_end; |
1025 | q += efi_desc_size) { |
1026 | check_md = q; |
1027 | if (!efi_wb(check_md)) |
1028 | break; |
1029 | if (contig_high != check_md->phys_addr) |
1030 | break; |
1031 | contig_high = efi_md_end(check_md); |
1032 | } |
1033 | contig_high = GRANULEROUNDDOWN(contig_high); |
1034 | } |
1035 | if (!is_memory_available(md) || md->type == EFI_LOADER_DATA) |
1036 | continue; |
1037 | |
1038 | /* Round ends inward to granule boundaries */ |
1039 | as = max(contig_low, md->phys_addr); |
1040 | ae = min(contig_high, efi_md_end(md)); |
1041 | |
1042 | /* keep within max_addr= and min_addr= command line arg */ |
1043 | as = max(as, min_addr); |
1044 | ae = min(ae, max_addr); |
1045 | if (ae <= as) |
1046 | continue; |
1047 | |
1048 | /* avoid going over mem= command line arg */ |
1049 | if (total_mem + (ae - as) > mem_limit) |
1050 | ae -= total_mem + (ae - as) - mem_limit; |
1051 | |
1052 | if (ae <= as) |
1053 | continue; |
1054 | |
1055 | if (ae - as > space_needed) |
1056 | break; |
1057 | } |
1058 | if (p >= efi_map_end) |
1059 | panic("Can't allocate space for kernel memory descriptors"); |
1060 | |
1061 | return __va(as); |
1062 | } |
1063 | |
1064 | /* |
1065 | * Walk the EFI memory map and gather all memory available for kernel |
1066 | * to use. We can allocate partial granules only if the unavailable |
1067 | * parts exist, and are WB. |
1068 | */ |
1069 | unsigned long |
1070 | efi_memmap_init(u64 *s, u64 *e) |
1071 | { |
1072 | struct kern_memdesc *k, *prev = NULL; |
1073 | u64 contig_low=0, contig_high=0; |
1074 | u64 as, ae, lim; |
1075 | void *efi_map_start, *efi_map_end, *p, *q; |
1076 | efi_memory_desc_t *md, *pmd = NULL, *check_md; |
1077 | u64 efi_desc_size; |
1078 | unsigned long total_mem = 0; |
1079 | |
1080 | k = kern_memmap = find_memmap_space(); |
1081 | |
1082 | efi_map_start = __va(ia64_boot_param->efi_memmap); |
1083 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; |
1084 | efi_desc_size = ia64_boot_param->efi_memdesc_size; |
1085 | |
1086 | for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) { |
1087 | md = p; |
1088 | if (!efi_wb(md)) { |
1089 | if (efi_uc(md) && |
1090 | (md->type == EFI_CONVENTIONAL_MEMORY || |
1091 | md->type == EFI_BOOT_SERVICES_DATA)) { |
1092 | k->attribute = EFI_MEMORY_UC; |
1093 | k->start = md->phys_addr; |
1094 | k->num_pages = md->num_pages; |
1095 | k++; |
1096 | } |
1097 | continue; |
1098 | } |
1099 | if (pmd == NULL || !efi_wb(pmd) || |
1100 | efi_md_end(pmd) != md->phys_addr) { |
1101 | contig_low = GRANULEROUNDUP(md->phys_addr); |
1102 | contig_high = efi_md_end(md); |
1103 | for (q = p + efi_desc_size; q < efi_map_end; |
1104 | q += efi_desc_size) { |
1105 | check_md = q; |
1106 | if (!efi_wb(check_md)) |
1107 | break; |
1108 | if (contig_high != check_md->phys_addr) |
1109 | break; |
1110 | contig_high = efi_md_end(check_md); |
1111 | } |
1112 | contig_high = GRANULEROUNDDOWN(contig_high); |
1113 | } |
1114 | if (!is_memory_available(md)) |
1115 | continue; |
1116 | |
1117 | #ifdef CONFIG_CRASH_DUMP |
1118 | /* saved_max_pfn should ignore max_addr= command line arg */ |
1119 | if (saved_max_pfn < (efi_md_end(md) >> PAGE_SHIFT)) |
1120 | saved_max_pfn = (efi_md_end(md) >> PAGE_SHIFT); |
1121 | #endif |
1122 | /* |
1123 | * Round ends inward to granule boundaries |
1124 | * Give trimmings to uncached allocator |
1125 | */ |
1126 | if (md->phys_addr < contig_low) { |
1127 | lim = min(efi_md_end(md), contig_low); |
1128 | if (efi_uc(md)) { |
1129 | if (k > kern_memmap && |
1130 | (k-1)->attribute == EFI_MEMORY_UC && |
1131 | kmd_end(k-1) == md->phys_addr) { |
1132 | (k-1)->num_pages += |
1133 | (lim - md->phys_addr) |
1134 | >> EFI_PAGE_SHIFT; |
1135 | } else { |
1136 | k->attribute = EFI_MEMORY_UC; |
1137 | k->start = md->phys_addr; |
1138 | k->num_pages = (lim - md->phys_addr) |
1139 | >> EFI_PAGE_SHIFT; |
1140 | k++; |
1141 | } |
1142 | } |
1143 | as = contig_low; |
1144 | } else |
1145 | as = md->phys_addr; |
1146 | |
1147 | if (efi_md_end(md) > contig_high) { |
1148 | lim = max(md->phys_addr, contig_high); |
1149 | if (efi_uc(md)) { |
1150 | if (lim == md->phys_addr && k > kern_memmap && |
1151 | (k-1)->attribute == EFI_MEMORY_UC && |
1152 | kmd_end(k-1) == md->phys_addr) { |
1153 | (k-1)->num_pages += md->num_pages; |
1154 | } else { |
1155 | k->attribute = EFI_MEMORY_UC; |
1156 | k->start = lim; |
1157 | k->num_pages = (efi_md_end(md) - lim) |
1158 | >> EFI_PAGE_SHIFT; |
1159 | k++; |
1160 | } |
1161 | } |
1162 | ae = contig_high; |
1163 | } else |
1164 | ae = efi_md_end(md); |
1165 | |
1166 | /* keep within max_addr= and min_addr= command line arg */ |
1167 | as = max(as, min_addr); |
1168 | ae = min(ae, max_addr); |
1169 | if (ae <= as) |
1170 | continue; |
1171 | |
1172 | /* avoid going over mem= command line arg */ |
1173 | if (total_mem + (ae - as) > mem_limit) |
1174 | ae -= total_mem + (ae - as) - mem_limit; |
1175 | |
1176 | if (ae <= as) |
1177 | continue; |
1178 | if (prev && kmd_end(prev) == md->phys_addr) { |
1179 | prev->num_pages += (ae - as) >> EFI_PAGE_SHIFT; |
1180 | total_mem += ae - as; |
1181 | continue; |
1182 | } |
1183 | k->attribute = EFI_MEMORY_WB; |
1184 | k->start = as; |
1185 | k->num_pages = (ae - as) >> EFI_PAGE_SHIFT; |
1186 | total_mem += ae - as; |
1187 | prev = k++; |
1188 | } |
1189 | k->start = ~0L; /* end-marker */ |
1190 | |
1191 | /* reserve the memory we are using for kern_memmap */ |
1192 | *s = (u64)kern_memmap; |
1193 | *e = (u64)++k; |
1194 | |
1195 | return total_mem; |
1196 | } |
1197 | |
1198 | void |
1199 | efi_initialize_iomem_resources(struct resource *code_resource, |
1200 | struct resource *data_resource, |
1201 | struct resource *bss_resource) |
1202 | { |
1203 | struct resource *res; |
1204 | void *efi_map_start, *efi_map_end, *p; |
1205 | efi_memory_desc_t *md; |
1206 | u64 efi_desc_size; |
1207 | char *name; |
1208 | unsigned long flags; |
1209 | |
1210 | efi_map_start = __va(ia64_boot_param->efi_memmap); |
1211 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; |
1212 | efi_desc_size = ia64_boot_param->efi_memdesc_size; |
1213 | |
1214 | res = NULL; |
1215 | |
1216 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { |
1217 | md = p; |
1218 | |
1219 | if (md->num_pages == 0) /* should not happen */ |
1220 | continue; |
1221 | |
1222 | flags = IORESOURCE_MEM | IORESOURCE_BUSY; |
1223 | switch (md->type) { |
1224 | |
1225 | case EFI_MEMORY_MAPPED_IO: |
1226 | case EFI_MEMORY_MAPPED_IO_PORT_SPACE: |
1227 | continue; |
1228 | |
1229 | case EFI_LOADER_CODE: |
1230 | case EFI_LOADER_DATA: |
1231 | case EFI_BOOT_SERVICES_DATA: |
1232 | case EFI_BOOT_SERVICES_CODE: |
1233 | case EFI_CONVENTIONAL_MEMORY: |
1234 | if (md->attribute & EFI_MEMORY_WP) { |
1235 | name = "System ROM"; |
1236 | flags |= IORESOURCE_READONLY; |
1237 | } else if (md->attribute == EFI_MEMORY_UC) |
1238 | name = "Uncached RAM"; |
1239 | else |
1240 | name = "System RAM"; |
1241 | break; |
1242 | |
1243 | case EFI_ACPI_MEMORY_NVS: |
1244 | name = "ACPI Non-volatile Storage"; |
1245 | break; |
1246 | |
1247 | case EFI_UNUSABLE_MEMORY: |
1248 | name = "reserved"; |
1249 | flags |= IORESOURCE_DISABLED; |
1250 | break; |
1251 | |
1252 | case EFI_RESERVED_TYPE: |
1253 | case EFI_RUNTIME_SERVICES_CODE: |
1254 | case EFI_RUNTIME_SERVICES_DATA: |
1255 | case EFI_ACPI_RECLAIM_MEMORY: |
1256 | default: |
1257 | name = "reserved"; |
1258 | break; |
1259 | } |
1260 | |
1261 | if ((res = kzalloc(sizeof(struct resource), |
1262 | GFP_KERNEL)) == NULL) { |
1263 | printk(KERN_ERR |
1264 | "failed to allocate resource for iomem\n"); |
1265 | return; |
1266 | } |
1267 | |
1268 | res->name = name; |
1269 | res->start = md->phys_addr; |
1270 | res->end = md->phys_addr + efi_md_size(md) - 1; |
1271 | res->flags = flags; |
1272 | |
1273 | if (insert_resource(&iomem_resource, res) < 0) |
1274 | kfree(res); |
1275 | else { |
1276 | /* |
1277 | * We don't know which region contains |
1278 | * kernel data so we try it repeatedly and |
1279 | * let the resource manager test it. |
1280 | */ |
1281 | insert_resource(res, code_resource); |
1282 | insert_resource(res, data_resource); |
1283 | insert_resource(res, bss_resource); |
1284 | #ifdef CONFIG_KEXEC |
1285 | insert_resource(res, &efi_memmap_res); |
1286 | insert_resource(res, &boot_param_res); |
1287 | if (crashk_res.end > crashk_res.start) |
1288 | insert_resource(res, &crashk_res); |
1289 | #endif |
1290 | } |
1291 | } |
1292 | } |
1293 | |
1294 | #ifdef CONFIG_KEXEC |
1295 | /* find a block of memory aligned to 64M exclude reserved regions |
1296 | rsvd_regions are sorted |
1297 | */ |
1298 | unsigned long __init |
1299 | kdump_find_rsvd_region (unsigned long size, struct rsvd_region *r, int n) |
1300 | { |
1301 | int i; |
1302 | u64 start, end; |
1303 | u64 alignment = 1UL << _PAGE_SIZE_64M; |
1304 | void *efi_map_start, *efi_map_end, *p; |
1305 | efi_memory_desc_t *md; |
1306 | u64 efi_desc_size; |
1307 | |
1308 | efi_map_start = __va(ia64_boot_param->efi_memmap); |
1309 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; |
1310 | efi_desc_size = ia64_boot_param->efi_memdesc_size; |
1311 | |
1312 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { |
1313 | md = p; |
1314 | if (!efi_wb(md)) |
1315 | continue; |
1316 | start = ALIGN(md->phys_addr, alignment); |
1317 | end = efi_md_end(md); |
1318 | for (i = 0; i < n; i++) { |
1319 | if (__pa(r[i].start) >= start && __pa(r[i].end) < end) { |
1320 | if (__pa(r[i].start) > start + size) |
1321 | return start; |
1322 | start = ALIGN(__pa(r[i].end), alignment); |
1323 | if (i < n-1 && |
1324 | __pa(r[i+1].start) < start + size) |
1325 | continue; |
1326 | else |
1327 | break; |
1328 | } |
1329 | } |
1330 | if (end > start + size) |
1331 | return start; |
1332 | } |
1333 | |
1334 | printk(KERN_WARNING |
1335 | "Cannot reserve 0x%lx byte of memory for crashdump\n", size); |
1336 | return ~0UL; |
1337 | } |
1338 | #endif |
1339 | |
1340 | #ifdef CONFIG_CRASH_DUMP |
1341 | /* locate the size find a the descriptor at a certain address */ |
1342 | unsigned long __init |
1343 | vmcore_find_descriptor_size (unsigned long address) |
1344 | { |
1345 | void *efi_map_start, *efi_map_end, *p; |
1346 | efi_memory_desc_t *md; |
1347 | u64 efi_desc_size; |
1348 | unsigned long ret = 0; |
1349 | |
1350 | efi_map_start = __va(ia64_boot_param->efi_memmap); |
1351 | efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; |
1352 | efi_desc_size = ia64_boot_param->efi_memdesc_size; |
1353 | |
1354 | for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { |
1355 | md = p; |
1356 | if (efi_wb(md) && md->type == EFI_LOADER_DATA |
1357 | && md->phys_addr == address) { |
1358 | ret = efi_md_size(md); |
1359 | break; |
1360 | } |
1361 | } |
1362 | |
1363 | if (ret == 0) |
1364 | printk(KERN_WARNING "Cannot locate EFI vmcore descriptor\n"); |
1365 | |
1366 | return ret; |
1367 | } |
1368 | #endif |
1369 |
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