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Commit | Line | Data |
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5b83683f HY |
1 | /* |
2 | * Common EFI (Extensible Firmware Interface) support functions | |
3 | * Based on Extensible Firmware Interface Specification version 1.0 | |
4 | * | |
5 | * Copyright (C) 1999 VA Linux Systems | |
6 | * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> | |
7 | * Copyright (C) 1999-2002 Hewlett-Packard Co. | |
8 | * David Mosberger-Tang <davidm@hpl.hp.com> | |
9 | * Stephane Eranian <eranian@hpl.hp.com> | |
10 | * Copyright (C) 2005-2008 Intel Co. | |
11 | * Fenghua Yu <fenghua.yu@intel.com> | |
12 | * Bibo Mao <bibo.mao@intel.com> | |
13 | * Chandramouli Narayanan <mouli@linux.intel.com> | |
14 | * Huang Ying <ying.huang@intel.com> | |
15 | * | |
16 | * Copied from efi_32.c to eliminate the duplicated code between EFI | |
17 | * 32/64 support code. --ying 2007-10-26 | |
18 | * | |
19 | * All EFI Runtime Services are not implemented yet as EFI only | |
20 | * supports physical mode addressing on SoftSDV. This is to be fixed | |
21 | * in a future version. --drummond 1999-07-20 | |
22 | * | |
23 | * Implemented EFI runtime services and virtual mode calls. --davidm | |
24 | * | |
25 | * Goutham Rao: <goutham.rao@intel.com> | |
26 | * Skip non-WB memory and ignore empty memory ranges. | |
27 | */ | |
28 | ||
e3cb3f5a OJ |
29 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
30 | ||
5b83683f HY |
31 | #include <linux/kernel.h> |
32 | #include <linux/init.h> | |
33 | #include <linux/efi.h> | |
2223af38 | 34 | #include <linux/efi-bgrt.h> |
69c60c88 | 35 | #include <linux/export.h> |
5b83683f | 36 | #include <linux/bootmem.h> |
a9ce6bc1 | 37 | #include <linux/memblock.h> |
5b83683f HY |
38 | #include <linux/spinlock.h> |
39 | #include <linux/uaccess.h> | |
40 | #include <linux/time.h> | |
41 | #include <linux/io.h> | |
42 | #include <linux/reboot.h> | |
43 | #include <linux/bcd.h> | |
44 | ||
45 | #include <asm/setup.h> | |
46 | #include <asm/efi.h> | |
47 | #include <asm/time.h> | |
a2172e25 HY |
48 | #include <asm/cacheflush.h> |
49 | #include <asm/tlbflush.h> | |
7bd867df | 50 | #include <asm/x86_init.h> |
5b83683f HY |
51 | |
52 | #define EFI_DEBUG 1 | |
5b83683f | 53 | |
d80603c9 JB |
54 | struct efi __read_mostly efi = { |
55 | .mps = EFI_INVALID_TABLE_ADDR, | |
56 | .acpi = EFI_INVALID_TABLE_ADDR, | |
57 | .acpi20 = EFI_INVALID_TABLE_ADDR, | |
58 | .smbios = EFI_INVALID_TABLE_ADDR, | |
59 | .sal_systab = EFI_INVALID_TABLE_ADDR, | |
60 | .boot_info = EFI_INVALID_TABLE_ADDR, | |
61 | .hcdp = EFI_INVALID_TABLE_ADDR, | |
62 | .uga = EFI_INVALID_TABLE_ADDR, | |
63 | .uv_systab = EFI_INVALID_TABLE_ADDR, | |
64 | }; | |
5b83683f HY |
65 | EXPORT_SYMBOL(efi); |
66 | ||
67 | struct efi_memory_map memmap; | |
68 | ||
ecaea42e | 69 | static struct efi efi_phys __initdata; |
5b83683f HY |
70 | static efi_system_table_t efi_systab __initdata; |
71 | ||
83e68189 MF |
72 | unsigned long x86_efi_facility; |
73 | ||
74 | /* | |
75 | * Returns 1 if 'facility' is enabled, 0 otherwise. | |
76 | */ | |
77 | int efi_enabled(int facility) | |
78 | { | |
79 | return test_bit(facility, &x86_efi_facility) != 0; | |
5189c2a7 | 80 | } |
83e68189 | 81 | EXPORT_SYMBOL(efi_enabled); |
5189c2a7 | 82 | |
058e7b58 | 83 | static bool __initdata disable_runtime = false; |
8b2cb7a8 HY |
84 | static int __init setup_noefi(char *arg) |
85 | { | |
fb834c7a | 86 | disable_runtime = true; |
8b2cb7a8 HY |
87 | return 0; |
88 | } | |
89 | early_param("noefi", setup_noefi); | |
90 | ||
200001eb PJ |
91 | int add_efi_memmap; |
92 | EXPORT_SYMBOL(add_efi_memmap); | |
93 | ||
94 | static int __init setup_add_efi_memmap(char *arg) | |
95 | { | |
96 | add_efi_memmap = 1; | |
97 | return 0; | |
98 | } | |
99 | early_param("add_efi_memmap", setup_add_efi_memmap); | |
100 | ||
101 | ||
5b83683f HY |
102 | static efi_status_t virt_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc) |
103 | { | |
ef68c8f8 JB |
104 | unsigned long flags; |
105 | efi_status_t status; | |
106 | ||
107 | spin_lock_irqsave(&rtc_lock, flags); | |
108 | status = efi_call_virt2(get_time, tm, tc); | |
109 | spin_unlock_irqrestore(&rtc_lock, flags); | |
110 | return status; | |
5b83683f HY |
111 | } |
112 | ||
113 | static efi_status_t virt_efi_set_time(efi_time_t *tm) | |
114 | { | |
ef68c8f8 JB |
115 | unsigned long flags; |
116 | efi_status_t status; | |
117 | ||
118 | spin_lock_irqsave(&rtc_lock, flags); | |
119 | status = efi_call_virt1(set_time, tm); | |
120 | spin_unlock_irqrestore(&rtc_lock, flags); | |
121 | return status; | |
5b83683f HY |
122 | } |
123 | ||
124 | static efi_status_t virt_efi_get_wakeup_time(efi_bool_t *enabled, | |
125 | efi_bool_t *pending, | |
126 | efi_time_t *tm) | |
127 | { | |
ef68c8f8 JB |
128 | unsigned long flags; |
129 | efi_status_t status; | |
130 | ||
131 | spin_lock_irqsave(&rtc_lock, flags); | |
132 | status = efi_call_virt3(get_wakeup_time, | |
133 | enabled, pending, tm); | |
134 | spin_unlock_irqrestore(&rtc_lock, flags); | |
135 | return status; | |
5b83683f HY |
136 | } |
137 | ||
138 | static efi_status_t virt_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm) | |
139 | { | |
ef68c8f8 JB |
140 | unsigned long flags; |
141 | efi_status_t status; | |
142 | ||
143 | spin_lock_irqsave(&rtc_lock, flags); | |
144 | status = efi_call_virt2(set_wakeup_time, | |
145 | enabled, tm); | |
146 | spin_unlock_irqrestore(&rtc_lock, flags); | |
147 | return status; | |
5b83683f HY |
148 | } |
149 | ||
150 | static efi_status_t virt_efi_get_variable(efi_char16_t *name, | |
151 | efi_guid_t *vendor, | |
152 | u32 *attr, | |
153 | unsigned long *data_size, | |
154 | void *data) | |
155 | { | |
156 | return efi_call_virt5(get_variable, | |
157 | name, vendor, attr, | |
158 | data_size, data); | |
159 | } | |
160 | ||
161 | static efi_status_t virt_efi_get_next_variable(unsigned long *name_size, | |
162 | efi_char16_t *name, | |
163 | efi_guid_t *vendor) | |
164 | { | |
165 | return efi_call_virt3(get_next_variable, | |
166 | name_size, name, vendor); | |
167 | } | |
168 | ||
169 | static efi_status_t virt_efi_set_variable(efi_char16_t *name, | |
170 | efi_guid_t *vendor, | |
f7a2d73f | 171 | u32 attr, |
5b83683f HY |
172 | unsigned long data_size, |
173 | void *data) | |
174 | { | |
175 | return efi_call_virt5(set_variable, | |
176 | name, vendor, attr, | |
177 | data_size, data); | |
178 | } | |
179 | ||
3b370237 MG |
180 | static efi_status_t virt_efi_query_variable_info(u32 attr, |
181 | u64 *storage_space, | |
182 | u64 *remaining_space, | |
183 | u64 *max_variable_size) | |
184 | { | |
185 | if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION) | |
186 | return EFI_UNSUPPORTED; | |
187 | ||
188 | return efi_call_virt4(query_variable_info, attr, storage_space, | |
189 | remaining_space, max_variable_size); | |
190 | } | |
191 | ||
5b83683f HY |
192 | static efi_status_t virt_efi_get_next_high_mono_count(u32 *count) |
193 | { | |
194 | return efi_call_virt1(get_next_high_mono_count, count); | |
195 | } | |
196 | ||
197 | static void virt_efi_reset_system(int reset_type, | |
198 | efi_status_t status, | |
199 | unsigned long data_size, | |
200 | efi_char16_t *data) | |
201 | { | |
202 | efi_call_virt4(reset_system, reset_type, status, | |
203 | data_size, data); | |
204 | } | |
205 | ||
3b370237 MG |
206 | static efi_status_t virt_efi_update_capsule(efi_capsule_header_t **capsules, |
207 | unsigned long count, | |
208 | unsigned long sg_list) | |
209 | { | |
210 | if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION) | |
211 | return EFI_UNSUPPORTED; | |
212 | ||
213 | return efi_call_virt3(update_capsule, capsules, count, sg_list); | |
214 | } | |
215 | ||
216 | static efi_status_t virt_efi_query_capsule_caps(efi_capsule_header_t **capsules, | |
217 | unsigned long count, | |
218 | u64 *max_size, | |
219 | int *reset_type) | |
220 | { | |
221 | if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION) | |
222 | return EFI_UNSUPPORTED; | |
223 | ||
224 | return efi_call_virt4(query_capsule_caps, capsules, count, max_size, | |
225 | reset_type); | |
226 | } | |
227 | ||
5b83683f HY |
228 | static efi_status_t __init phys_efi_set_virtual_address_map( |
229 | unsigned long memory_map_size, | |
230 | unsigned long descriptor_size, | |
231 | u32 descriptor_version, | |
232 | efi_memory_desc_t *virtual_map) | |
233 | { | |
234 | efi_status_t status; | |
235 | ||
236 | efi_call_phys_prelog(); | |
237 | status = efi_call_phys4(efi_phys.set_virtual_address_map, | |
238 | memory_map_size, descriptor_size, | |
239 | descriptor_version, virtual_map); | |
240 | efi_call_phys_epilog(); | |
241 | return status; | |
242 | } | |
243 | ||
11520e5e LT |
244 | static efi_status_t __init phys_efi_get_time(efi_time_t *tm, |
245 | efi_time_cap_t *tc) | |
246 | { | |
247 | unsigned long flags; | |
248 | efi_status_t status; | |
249 | ||
250 | spin_lock_irqsave(&rtc_lock, flags); | |
251 | efi_call_phys_prelog(); | |
252 | status = efi_call_phys2(efi_phys.get_time, virt_to_phys(tm), | |
253 | virt_to_phys(tc)); | |
254 | efi_call_phys_epilog(); | |
255 | spin_unlock_irqrestore(&rtc_lock, flags); | |
256 | return status; | |
257 | } | |
258 | ||
259 | int efi_set_rtc_mmss(unsigned long nowtime) | |
5b83683f HY |
260 | { |
261 | int real_seconds, real_minutes; | |
262 | efi_status_t status; | |
263 | efi_time_t eft; | |
264 | efi_time_cap_t cap; | |
265 | ||
266 | status = efi.get_time(&eft, &cap); | |
267 | if (status != EFI_SUCCESS) { | |
e3cb3f5a | 268 | pr_err("Oops: efitime: can't read time!\n"); |
5b83683f HY |
269 | return -1; |
270 | } | |
271 | ||
272 | real_seconds = nowtime % 60; | |
273 | real_minutes = nowtime / 60; | |
274 | if (((abs(real_minutes - eft.minute) + 15)/30) & 1) | |
275 | real_minutes += 30; | |
276 | real_minutes %= 60; | |
277 | eft.minute = real_minutes; | |
278 | eft.second = real_seconds; | |
279 | ||
280 | status = efi.set_time(&eft); | |
281 | if (status != EFI_SUCCESS) { | |
e3cb3f5a | 282 | pr_err("Oops: efitime: can't write time!\n"); |
5b83683f HY |
283 | return -1; |
284 | } | |
285 | return 0; | |
286 | } | |
287 | ||
11520e5e | 288 | unsigned long efi_get_time(void) |
5b83683f HY |
289 | { |
290 | efi_status_t status; | |
291 | efi_time_t eft; | |
292 | efi_time_cap_t cap; | |
293 | ||
294 | status = efi.get_time(&eft, &cap); | |
295 | if (status != EFI_SUCCESS) | |
e3cb3f5a | 296 | pr_err("Oops: efitime: can't read time!\n"); |
5b83683f HY |
297 | |
298 | return mktime(eft.year, eft.month, eft.day, eft.hour, | |
299 | eft.minute, eft.second); | |
300 | } | |
301 | ||
69c91893 PJ |
302 | /* |
303 | * Tell the kernel about the EFI memory map. This might include | |
304 | * more than the max 128 entries that can fit in the e820 legacy | |
305 | * (zeropage) memory map. | |
306 | */ | |
307 | ||
200001eb | 308 | static void __init do_add_efi_memmap(void) |
69c91893 PJ |
309 | { |
310 | void *p; | |
311 | ||
312 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { | |
313 | efi_memory_desc_t *md = p; | |
314 | unsigned long long start = md->phys_addr; | |
315 | unsigned long long size = md->num_pages << EFI_PAGE_SHIFT; | |
316 | int e820_type; | |
317 | ||
e2a71476 CW |
318 | switch (md->type) { |
319 | case EFI_LOADER_CODE: | |
320 | case EFI_LOADER_DATA: | |
321 | case EFI_BOOT_SERVICES_CODE: | |
322 | case EFI_BOOT_SERVICES_DATA: | |
323 | case EFI_CONVENTIONAL_MEMORY: | |
324 | if (md->attribute & EFI_MEMORY_WB) | |
325 | e820_type = E820_RAM; | |
326 | else | |
327 | e820_type = E820_RESERVED; | |
328 | break; | |
329 | case EFI_ACPI_RECLAIM_MEMORY: | |
330 | e820_type = E820_ACPI; | |
331 | break; | |
332 | case EFI_ACPI_MEMORY_NVS: | |
333 | e820_type = E820_NVS; | |
334 | break; | |
335 | case EFI_UNUSABLE_MEMORY: | |
336 | e820_type = E820_UNUSABLE; | |
337 | break; | |
338 | default: | |
339 | /* | |
340 | * EFI_RESERVED_TYPE EFI_RUNTIME_SERVICES_CODE | |
341 | * EFI_RUNTIME_SERVICES_DATA EFI_MEMORY_MAPPED_IO | |
342 | * EFI_MEMORY_MAPPED_IO_PORT_SPACE EFI_PAL_CODE | |
343 | */ | |
69c91893 | 344 | e820_type = E820_RESERVED; |
e2a71476 CW |
345 | break; |
346 | } | |
d0be6bde | 347 | e820_add_region(start, size, e820_type); |
69c91893 PJ |
348 | } |
349 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); | |
350 | } | |
351 | ||
1adbfa35 | 352 | int __init efi_memblock_x86_reserve_range(void) |
ecacf09f HY |
353 | { |
354 | unsigned long pmap; | |
355 | ||
05486fa7 | 356 | #ifdef CONFIG_X86_32 |
1adbfa35 OJ |
357 | /* Can't handle data above 4GB at this time */ |
358 | if (boot_params.efi_info.efi_memmap_hi) { | |
359 | pr_err("Memory map is above 4GB, disabling EFI.\n"); | |
360 | return -EINVAL; | |
361 | } | |
ecacf09f | 362 | pmap = boot_params.efi_info.efi_memmap; |
05486fa7 PJ |
363 | #else |
364 | pmap = (boot_params.efi_info.efi_memmap | | |
365 | ((__u64)boot_params.efi_info.efi_memmap_hi<<32)); | |
ecacf09f HY |
366 | #endif |
367 | memmap.phys_map = (void *)pmap; | |
368 | memmap.nr_map = boot_params.efi_info.efi_memmap_size / | |
369 | boot_params.efi_info.efi_memdesc_size; | |
370 | memmap.desc_version = boot_params.efi_info.efi_memdesc_version; | |
371 | memmap.desc_size = boot_params.efi_info.efi_memdesc_size; | |
24aa0788 | 372 | memblock_reserve(pmap, memmap.nr_map * memmap.desc_size); |
1adbfa35 OJ |
373 | |
374 | return 0; | |
ecacf09f HY |
375 | } |
376 | ||
5b83683f HY |
377 | #if EFI_DEBUG |
378 | static void __init print_efi_memmap(void) | |
379 | { | |
380 | efi_memory_desc_t *md; | |
381 | void *p; | |
382 | int i; | |
383 | ||
384 | for (p = memmap.map, i = 0; | |
385 | p < memmap.map_end; | |
386 | p += memmap.desc_size, i++) { | |
387 | md = p; | |
e3cb3f5a | 388 | pr_info("mem%02u: type=%u, attr=0x%llx, " |
5b83683f HY |
389 | "range=[0x%016llx-0x%016llx) (%lluMB)\n", |
390 | i, md->type, md->attribute, md->phys_addr, | |
391 | md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT), | |
392 | (md->num_pages >> (20 - EFI_PAGE_SHIFT))); | |
393 | } | |
394 | } | |
395 | #endif /* EFI_DEBUG */ | |
396 | ||
916f676f MG |
397 | void __init efi_reserve_boot_services(void) |
398 | { | |
399 | void *p; | |
400 | ||
401 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { | |
402 | efi_memory_desc_t *md = p; | |
7d68dc3f ML |
403 | u64 start = md->phys_addr; |
404 | u64 size = md->num_pages << EFI_PAGE_SHIFT; | |
916f676f MG |
405 | |
406 | if (md->type != EFI_BOOT_SERVICES_CODE && | |
407 | md->type != EFI_BOOT_SERVICES_DATA) | |
408 | continue; | |
7d68dc3f ML |
409 | /* Only reserve where possible: |
410 | * - Not within any already allocated areas | |
411 | * - Not over any memory area (really needed, if above?) | |
412 | * - Not within any part of the kernel | |
413 | * - Not the bios reserved area | |
414 | */ | |
fc8d7826 AD |
415 | if ((start+size >= __pa_symbol(_text) |
416 | && start <= __pa_symbol(_end)) || | |
7d68dc3f | 417 | !e820_all_mapped(start, start+size, E820_RAM) || |
bf61549a | 418 | memblock_is_region_reserved(start, size)) { |
7d68dc3f ML |
419 | /* Could not reserve, skip it */ |
420 | md->num_pages = 0; | |
e3cb3f5a | 421 | memblock_dbg("Could not reserve boot range " |
7d68dc3f ML |
422 | "[0x%010llx-0x%010llx]\n", |
423 | start, start+size-1); | |
424 | } else | |
24aa0788 | 425 | memblock_reserve(start, size); |
916f676f MG |
426 | } |
427 | } | |
428 | ||
5189c2a7 | 429 | void __init efi_unmap_memmap(void) |
78510792 | 430 | { |
83e68189 | 431 | clear_bit(EFI_MEMMAP, &x86_efi_facility); |
78510792 JT |
432 | if (memmap.map) { |
433 | early_iounmap(memmap.map, memmap.nr_map * memmap.desc_size); | |
434 | memmap.map = NULL; | |
435 | } | |
436 | } | |
437 | ||
438 | void __init efi_free_boot_services(void) | |
916f676f MG |
439 | { |
440 | void *p; | |
441 | ||
5189c2a7 | 442 | if (!efi_is_native()) |
78510792 JT |
443 | return; |
444 | ||
916f676f MG |
445 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { |
446 | efi_memory_desc_t *md = p; | |
447 | unsigned long long start = md->phys_addr; | |
448 | unsigned long long size = md->num_pages << EFI_PAGE_SHIFT; | |
449 | ||
450 | if (md->type != EFI_BOOT_SERVICES_CODE && | |
451 | md->type != EFI_BOOT_SERVICES_DATA) | |
452 | continue; | |
453 | ||
7d68dc3f ML |
454 | /* Could not reserve boot area */ |
455 | if (!size) | |
456 | continue; | |
457 | ||
916f676f MG |
458 | free_bootmem_late(start, size); |
459 | } | |
78510792 JT |
460 | |
461 | efi_unmap_memmap(); | |
916f676f MG |
462 | } |
463 | ||
140bf275 | 464 | static int __init efi_systab_init(void *phys) |
5b83683f | 465 | { |
83e68189 | 466 | if (efi_enabled(EFI_64BIT)) { |
1adbfa35 OJ |
467 | efi_system_table_64_t *systab64; |
468 | u64 tmp = 0; | |
469 | ||
470 | systab64 = early_ioremap((unsigned long)phys, | |
471 | sizeof(*systab64)); | |
472 | if (systab64 == NULL) { | |
473 | pr_err("Couldn't map the system table!\n"); | |
474 | return -ENOMEM; | |
475 | } | |
476 | ||
477 | efi_systab.hdr = systab64->hdr; | |
478 | efi_systab.fw_vendor = systab64->fw_vendor; | |
479 | tmp |= systab64->fw_vendor; | |
480 | efi_systab.fw_revision = systab64->fw_revision; | |
481 | efi_systab.con_in_handle = systab64->con_in_handle; | |
482 | tmp |= systab64->con_in_handle; | |
483 | efi_systab.con_in = systab64->con_in; | |
484 | tmp |= systab64->con_in; | |
485 | efi_systab.con_out_handle = systab64->con_out_handle; | |
486 | tmp |= systab64->con_out_handle; | |
487 | efi_systab.con_out = systab64->con_out; | |
488 | tmp |= systab64->con_out; | |
489 | efi_systab.stderr_handle = systab64->stderr_handle; | |
490 | tmp |= systab64->stderr_handle; | |
491 | efi_systab.stderr = systab64->stderr; | |
492 | tmp |= systab64->stderr; | |
493 | efi_systab.runtime = (void *)(unsigned long)systab64->runtime; | |
494 | tmp |= systab64->runtime; | |
495 | efi_systab.boottime = (void *)(unsigned long)systab64->boottime; | |
496 | tmp |= systab64->boottime; | |
497 | efi_systab.nr_tables = systab64->nr_tables; | |
498 | efi_systab.tables = systab64->tables; | |
499 | tmp |= systab64->tables; | |
500 | ||
501 | early_iounmap(systab64, sizeof(*systab64)); | |
502 | #ifdef CONFIG_X86_32 | |
503 | if (tmp >> 32) { | |
504 | pr_err("EFI data located above 4GB, disabling EFI.\n"); | |
505 | return -EINVAL; | |
506 | } | |
507 | #endif | |
508 | } else { | |
509 | efi_system_table_32_t *systab32; | |
510 | ||
511 | systab32 = early_ioremap((unsigned long)phys, | |
512 | sizeof(*systab32)); | |
513 | if (systab32 == NULL) { | |
514 | pr_err("Couldn't map the system table!\n"); | |
515 | return -ENOMEM; | |
516 | } | |
517 | ||
518 | efi_systab.hdr = systab32->hdr; | |
519 | efi_systab.fw_vendor = systab32->fw_vendor; | |
520 | efi_systab.fw_revision = systab32->fw_revision; | |
521 | efi_systab.con_in_handle = systab32->con_in_handle; | |
522 | efi_systab.con_in = systab32->con_in; | |
523 | efi_systab.con_out_handle = systab32->con_out_handle; | |
524 | efi_systab.con_out = systab32->con_out; | |
525 | efi_systab.stderr_handle = systab32->stderr_handle; | |
526 | efi_systab.stderr = systab32->stderr; | |
527 | efi_systab.runtime = (void *)(unsigned long)systab32->runtime; | |
528 | efi_systab.boottime = (void *)(unsigned long)systab32->boottime; | |
529 | efi_systab.nr_tables = systab32->nr_tables; | |
530 | efi_systab.tables = systab32->tables; | |
531 | ||
532 | early_iounmap(systab32, sizeof(*systab32)); | |
140bf275 | 533 | } |
1adbfa35 | 534 | |
5b83683f HY |
535 | efi.systab = &efi_systab; |
536 | ||
537 | /* | |
538 | * Verify the EFI Table | |
539 | */ | |
140bf275 | 540 | if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) { |
e3cb3f5a | 541 | pr_err("System table signature incorrect!\n"); |
140bf275 OJ |
542 | return -EINVAL; |
543 | } | |
5b83683f | 544 | if ((efi.systab->hdr.revision >> 16) == 0) |
e3cb3f5a | 545 | pr_err("Warning: System table version " |
5b83683f HY |
546 | "%d.%02d, expected 1.00 or greater!\n", |
547 | efi.systab->hdr.revision >> 16, | |
548 | efi.systab->hdr.revision & 0xffff); | |
140bf275 OJ |
549 | |
550 | return 0; | |
83e7ee66 | 551 | } |
5b83683f | 552 | |
140bf275 | 553 | static int __init efi_config_init(u64 tables, int nr_tables) |
83e7ee66 | 554 | { |
1adbfa35 OJ |
555 | void *config_tables, *tablep; |
556 | int i, sz; | |
557 | ||
83e68189 | 558 | if (efi_enabled(EFI_64BIT)) |
1adbfa35 OJ |
559 | sz = sizeof(efi_config_table_64_t); |
560 | else | |
561 | sz = sizeof(efi_config_table_32_t); | |
5b83683f HY |
562 | |
563 | /* | |
564 | * Let's see what config tables the firmware passed to us. | |
565 | */ | |
1adbfa35 | 566 | config_tables = early_ioremap(tables, nr_tables * sz); |
140bf275 | 567 | if (config_tables == NULL) { |
e3cb3f5a | 568 | pr_err("Could not map Configuration table!\n"); |
140bf275 OJ |
569 | return -ENOMEM; |
570 | } | |
5b83683f | 571 | |
1adbfa35 | 572 | tablep = config_tables; |
e3cb3f5a | 573 | pr_info(""); |
5b83683f | 574 | for (i = 0; i < efi.systab->nr_tables; i++) { |
1adbfa35 OJ |
575 | efi_guid_t guid; |
576 | unsigned long table; | |
577 | ||
83e68189 | 578 | if (efi_enabled(EFI_64BIT)) { |
1adbfa35 OJ |
579 | u64 table64; |
580 | guid = ((efi_config_table_64_t *)tablep)->guid; | |
581 | table64 = ((efi_config_table_64_t *)tablep)->table; | |
582 | table = table64; | |
583 | #ifdef CONFIG_X86_32 | |
584 | if (table64 >> 32) { | |
585 | pr_cont("\n"); | |
586 | pr_err("Table located above 4GB, disabling EFI.\n"); | |
587 | early_iounmap(config_tables, | |
588 | efi.systab->nr_tables * sz); | |
589 | return -EINVAL; | |
590 | } | |
591 | #endif | |
592 | } else { | |
593 | guid = ((efi_config_table_32_t *)tablep)->guid; | |
594 | table = ((efi_config_table_32_t *)tablep)->table; | |
595 | } | |
a6a46f41 OJ |
596 | if (!efi_guidcmp(guid, MPS_TABLE_GUID)) { |
597 | efi.mps = table; | |
598 | pr_cont(" MPS=0x%lx ", table); | |
599 | } else if (!efi_guidcmp(guid, ACPI_20_TABLE_GUID)) { | |
600 | efi.acpi20 = table; | |
601 | pr_cont(" ACPI 2.0=0x%lx ", table); | |
602 | } else if (!efi_guidcmp(guid, ACPI_TABLE_GUID)) { | |
603 | efi.acpi = table; | |
604 | pr_cont(" ACPI=0x%lx ", table); | |
605 | } else if (!efi_guidcmp(guid, SMBIOS_TABLE_GUID)) { | |
606 | efi.smbios = table; | |
607 | pr_cont(" SMBIOS=0x%lx ", table); | |
03b48632 | 608 | #ifdef CONFIG_X86_UV |
a6a46f41 OJ |
609 | } else if (!efi_guidcmp(guid, UV_SYSTEM_TABLE_GUID)) { |
610 | efi.uv_systab = table; | |
611 | pr_cont(" UVsystab=0x%lx ", table); | |
03b48632 | 612 | #endif |
a6a46f41 OJ |
613 | } else if (!efi_guidcmp(guid, HCDP_TABLE_GUID)) { |
614 | efi.hcdp = table; | |
615 | pr_cont(" HCDP=0x%lx ", table); | |
616 | } else if (!efi_guidcmp(guid, UGA_IO_PROTOCOL_GUID)) { | |
617 | efi.uga = table; | |
618 | pr_cont(" UGA=0x%lx ", table); | |
5b83683f | 619 | } |
1adbfa35 | 620 | tablep += sz; |
5b83683f | 621 | } |
e3cb3f5a | 622 | pr_cont("\n"); |
a6a46f41 | 623 | early_iounmap(config_tables, efi.systab->nr_tables * sz); |
140bf275 | 624 | return 0; |
83e7ee66 OJ |
625 | } |
626 | ||
140bf275 | 627 | static int __init efi_runtime_init(void) |
83e7ee66 OJ |
628 | { |
629 | efi_runtime_services_t *runtime; | |
5b83683f HY |
630 | |
631 | /* | |
632 | * Check out the runtime services table. We need to map | |
633 | * the runtime services table so that we can grab the physical | |
634 | * address of several of the EFI runtime functions, needed to | |
635 | * set the firmware into virtual mode. | |
636 | */ | |
beacfaac HY |
637 | runtime = early_ioremap((unsigned long)efi.systab->runtime, |
638 | sizeof(efi_runtime_services_t)); | |
140bf275 | 639 | if (!runtime) { |
e3cb3f5a | 640 | pr_err("Could not map the runtime service table!\n"); |
140bf275 OJ |
641 | return -ENOMEM; |
642 | } | |
643 | /* | |
644 | * We will only need *early* access to the following | |
11520e5e | 645 | * two EFI runtime services before set_virtual_address_map |
140bf275 OJ |
646 | * is invoked. |
647 | */ | |
11520e5e | 648 | efi_phys.get_time = (efi_get_time_t *)runtime->get_time; |
140bf275 OJ |
649 | efi_phys.set_virtual_address_map = |
650 | (efi_set_virtual_address_map_t *) | |
651 | runtime->set_virtual_address_map; | |
11520e5e LT |
652 | /* |
653 | * Make efi_get_time can be called before entering | |
654 | * virtual mode. | |
655 | */ | |
656 | efi.get_time = phys_efi_get_time; | |
beacfaac | 657 | early_iounmap(runtime, sizeof(efi_runtime_services_t)); |
140bf275 OJ |
658 | |
659 | return 0; | |
83e7ee66 | 660 | } |
5b83683f | 661 | |
140bf275 | 662 | static int __init efi_memmap_init(void) |
83e7ee66 | 663 | { |
5b83683f | 664 | /* Map the EFI memory map */ |
beacfaac HY |
665 | memmap.map = early_ioremap((unsigned long)memmap.phys_map, |
666 | memmap.nr_map * memmap.desc_size); | |
140bf275 | 667 | if (memmap.map == NULL) { |
e3cb3f5a | 668 | pr_err("Could not map the memory map!\n"); |
140bf275 OJ |
669 | return -ENOMEM; |
670 | } | |
5b83683f | 671 | memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size); |
175e438f | 672 | |
200001eb PJ |
673 | if (add_efi_memmap) |
674 | do_add_efi_memmap(); | |
140bf275 OJ |
675 | |
676 | return 0; | |
83e7ee66 OJ |
677 | } |
678 | ||
679 | void __init efi_init(void) | |
680 | { | |
681 | efi_char16_t *c16; | |
682 | char vendor[100] = "unknown"; | |
683 | int i = 0; | |
684 | void *tmp; | |
685 | ||
686 | #ifdef CONFIG_X86_32 | |
1adbfa35 OJ |
687 | if (boot_params.efi_info.efi_systab_hi || |
688 | boot_params.efi_info.efi_memmap_hi) { | |
689 | pr_info("Table located above 4GB, disabling EFI.\n"); | |
1adbfa35 OJ |
690 | return; |
691 | } | |
83e7ee66 OJ |
692 | efi_phys.systab = (efi_system_table_t *)boot_params.efi_info.efi_systab; |
693 | #else | |
694 | efi_phys.systab = (efi_system_table_t *) | |
1adbfa35 OJ |
695 | (boot_params.efi_info.efi_systab | |
696 | ((__u64)boot_params.efi_info.efi_systab_hi<<32)); | |
83e7ee66 OJ |
697 | #endif |
698 | ||
83e68189 | 699 | if (efi_systab_init(efi_phys.systab)) |
140bf275 | 700 | return; |
83e68189 MF |
701 | |
702 | set_bit(EFI_SYSTEM_TABLES, &x86_efi_facility); | |
83e7ee66 OJ |
703 | |
704 | /* | |
705 | * Show what we know for posterity | |
706 | */ | |
707 | c16 = tmp = early_ioremap(efi.systab->fw_vendor, 2); | |
708 | if (c16) { | |
709 | for (i = 0; i < sizeof(vendor) - 1 && *c16; ++i) | |
710 | vendor[i] = *c16++; | |
711 | vendor[i] = '\0'; | |
712 | } else | |
e3cb3f5a | 713 | pr_err("Could not map the firmware vendor!\n"); |
83e7ee66 OJ |
714 | early_iounmap(tmp, 2); |
715 | ||
e3cb3f5a OJ |
716 | pr_info("EFI v%u.%.02u by %s\n", |
717 | efi.systab->hdr.revision >> 16, | |
718 | efi.systab->hdr.revision & 0xffff, vendor); | |
83e7ee66 | 719 | |
83e68189 | 720 | if (efi_config_init(efi.systab->tables, efi.systab->nr_tables)) |
140bf275 | 721 | return; |
83e68189 MF |
722 | |
723 | set_bit(EFI_CONFIG_TABLES, &x86_efi_facility); | |
83e7ee66 | 724 | |
1adbfa35 OJ |
725 | /* |
726 | * Note: We currently don't support runtime services on an EFI | |
727 | * that doesn't match the kernel 32/64-bit mode. | |
728 | */ | |
729 | ||
5189c2a7 | 730 | if (!efi_is_native()) |
1adbfa35 | 731 | pr_info("No EFI runtime due to 32/64-bit mismatch with kernel\n"); |
83e68189 | 732 | else { |
fb834c7a | 733 | if (disable_runtime || efi_runtime_init()) |
83e68189 MF |
734 | return; |
735 | set_bit(EFI_RUNTIME_SERVICES, &x86_efi_facility); | |
140bf275 | 736 | } |
83e7ee66 | 737 | |
83e68189 | 738 | if (efi_memmap_init()) |
140bf275 | 739 | return; |
83e68189 MF |
740 | |
741 | set_bit(EFI_MEMMAP, &x86_efi_facility); | |
742 | ||
11520e5e | 743 | #ifdef CONFIG_X86_32 |
5189c2a7 | 744 | if (efi_is_native()) { |
1adbfa35 OJ |
745 | x86_platform.get_wallclock = efi_get_time; |
746 | x86_platform.set_wallclock = efi_set_rtc_mmss; | |
747 | } | |
11520e5e | 748 | #endif |
7bd867df | 749 | |
5b83683f HY |
750 | #if EFI_DEBUG |
751 | print_efi_memmap(); | |
752 | #endif | |
753 | } | |
754 | ||
2223af38 JT |
755 | void __init efi_late_init(void) |
756 | { | |
757 | efi_bgrt_init(); | |
758 | } | |
759 | ||
9cd2b07c MG |
760 | void __init efi_set_executable(efi_memory_desc_t *md, bool executable) |
761 | { | |
762 | u64 addr, npages; | |
763 | ||
764 | addr = md->virt_addr; | |
765 | npages = md->num_pages; | |
766 | ||
767 | memrange_efi_to_native(&addr, &npages); | |
768 | ||
769 | if (executable) | |
770 | set_memory_x(addr, npages); | |
771 | else | |
772 | set_memory_nx(addr, npages); | |
773 | } | |
774 | ||
a2172e25 HY |
775 | static void __init runtime_code_page_mkexec(void) |
776 | { | |
777 | efi_memory_desc_t *md; | |
a2172e25 HY |
778 | void *p; |
779 | ||
a2172e25 HY |
780 | /* Make EFI runtime service code area executable */ |
781 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { | |
782 | md = p; | |
1c083eb2 HY |
783 | |
784 | if (md->type != EFI_RUNTIME_SERVICES_CODE) | |
785 | continue; | |
786 | ||
9cd2b07c | 787 | efi_set_executable(md, true); |
a2172e25 | 788 | } |
a2172e25 | 789 | } |
a2172e25 | 790 | |
7bc90e01 JT |
791 | /* |
792 | * We can't ioremap data in EFI boot services RAM, because we've already mapped | |
793 | * it as RAM. So, look it up in the existing EFI memory map instead. Only | |
794 | * callable after efi_enter_virtual_mode and before efi_free_boot_services. | |
795 | */ | |
796 | void __iomem *efi_lookup_mapped_addr(u64 phys_addr) | |
797 | { | |
798 | void *p; | |
799 | if (WARN_ON(!memmap.map)) | |
800 | return NULL; | |
801 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { | |
802 | efi_memory_desc_t *md = p; | |
803 | u64 size = md->num_pages << EFI_PAGE_SHIFT; | |
804 | u64 end = md->phys_addr + size; | |
805 | if (!(md->attribute & EFI_MEMORY_RUNTIME) && | |
806 | md->type != EFI_BOOT_SERVICES_CODE && | |
807 | md->type != EFI_BOOT_SERVICES_DATA) | |
808 | continue; | |
809 | if (!md->virt_addr) | |
810 | continue; | |
811 | if (phys_addr >= md->phys_addr && phys_addr < end) { | |
812 | phys_addr += md->virt_addr - md->phys_addr; | |
813 | return (__force void __iomem *)(unsigned long)phys_addr; | |
814 | } | |
815 | } | |
816 | return NULL; | |
817 | } | |
818 | ||
3e8fa263 MF |
819 | void efi_memory_uc(u64 addr, unsigned long size) |
820 | { | |
821 | unsigned long page_shift = 1UL << EFI_PAGE_SHIFT; | |
822 | u64 npages; | |
823 | ||
824 | npages = round_up(size, page_shift) / page_shift; | |
825 | memrange_efi_to_native(&addr, &npages); | |
826 | set_memory_uc(addr, npages); | |
827 | } | |
828 | ||
5b83683f HY |
829 | /* |
830 | * This function will switch the EFI runtime services to virtual mode. | |
831 | * Essentially, look through the EFI memmap and map every region that | |
832 | * has the runtime attribute bit set in its memory descriptor and update | |
833 | * that memory descriptor with the virtual address obtained from ioremap(). | |
834 | * This enables the runtime services to be called without having to | |
835 | * thunk back into physical mode for every invocation. | |
836 | */ | |
837 | void __init efi_enter_virtual_mode(void) | |
838 | { | |
202f9d0a | 839 | efi_memory_desc_t *md, *prev_md = NULL; |
5b83683f | 840 | efi_status_t status; |
1c083eb2 | 841 | unsigned long size; |
dda56e13 | 842 | u64 end, systab, start_pfn, end_pfn; |
7cb00b72 MG |
843 | void *p, *va, *new_memmap = NULL; |
844 | int count = 0; | |
5b83683f HY |
845 | |
846 | efi.systab = NULL; | |
202f9d0a | 847 | |
1adbfa35 OJ |
848 | /* |
849 | * We don't do virtual mode, since we don't do runtime services, on | |
850 | * non-native EFI | |
851 | */ | |
852 | ||
5189c2a7 | 853 | if (!efi_is_native()) { |
78510792 JT |
854 | efi_unmap_memmap(); |
855 | return; | |
856 | } | |
1adbfa35 | 857 | |
202f9d0a MG |
858 | /* Merge contiguous regions of the same type and attribute */ |
859 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { | |
860 | u64 prev_size; | |
861 | md = p; | |
862 | ||
863 | if (!prev_md) { | |
864 | prev_md = md; | |
865 | continue; | |
866 | } | |
867 | ||
868 | if (prev_md->type != md->type || | |
869 | prev_md->attribute != md->attribute) { | |
870 | prev_md = md; | |
871 | continue; | |
872 | } | |
873 | ||
874 | prev_size = prev_md->num_pages << EFI_PAGE_SHIFT; | |
875 | ||
876 | if (md->phys_addr == (prev_md->phys_addr + prev_size)) { | |
877 | prev_md->num_pages += md->num_pages; | |
878 | md->type = EFI_RESERVED_TYPE; | |
879 | md->attribute = 0; | |
880 | continue; | |
881 | } | |
882 | prev_md = md; | |
883 | } | |
884 | ||
5b83683f HY |
885 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { |
886 | md = p; | |
916f676f MG |
887 | if (!(md->attribute & EFI_MEMORY_RUNTIME) && |
888 | md->type != EFI_BOOT_SERVICES_CODE && | |
889 | md->type != EFI_BOOT_SERVICES_DATA) | |
5b83683f | 890 | continue; |
1c083eb2 HY |
891 | |
892 | size = md->num_pages << EFI_PAGE_SHIFT; | |
893 | end = md->phys_addr + size; | |
894 | ||
dda56e13 | 895 | start_pfn = PFN_DOWN(md->phys_addr); |
dd39ecf5 | 896 | end_pfn = PFN_UP(end); |
dda56e13 | 897 | if (pfn_range_is_mapped(start_pfn, end_pfn)) { |
1c083eb2 | 898 | va = __va(md->phys_addr); |
3e8fa263 MF |
899 | |
900 | if (!(md->attribute & EFI_MEMORY_WB)) | |
901 | efi_memory_uc((u64)(unsigned long)va, size); | |
902 | } else | |
903 | va = efi_ioremap(md->phys_addr, size, | |
904 | md->type, md->attribute); | |
1c083eb2 | 905 | |
1c083eb2 HY |
906 | md->virt_addr = (u64) (unsigned long) va; |
907 | ||
908 | if (!va) { | |
e3cb3f5a | 909 | pr_err("ioremap of 0x%llX failed!\n", |
5b83683f | 910 | (unsigned long long)md->phys_addr); |
1c083eb2 HY |
911 | continue; |
912 | } | |
913 | ||
914 | systab = (u64) (unsigned long) efi_phys.systab; | |
915 | if (md->phys_addr <= systab && systab < end) { | |
916 | systab += md->virt_addr - md->phys_addr; | |
917 | efi.systab = (efi_system_table_t *) (unsigned long) systab; | |
918 | } | |
7cb00b72 MG |
919 | new_memmap = krealloc(new_memmap, |
920 | (count + 1) * memmap.desc_size, | |
921 | GFP_KERNEL); | |
922 | memcpy(new_memmap + (count * memmap.desc_size), md, | |
923 | memmap.desc_size); | |
924 | count++; | |
5b83683f HY |
925 | } |
926 | ||
927 | BUG_ON(!efi.systab); | |
928 | ||
929 | status = phys_efi_set_virtual_address_map( | |
7cb00b72 | 930 | memmap.desc_size * count, |
5b83683f HY |
931 | memmap.desc_size, |
932 | memmap.desc_version, | |
7cb00b72 | 933 | (efi_memory_desc_t *)__pa(new_memmap)); |
5b83683f HY |
934 | |
935 | if (status != EFI_SUCCESS) { | |
e3cb3f5a OJ |
936 | pr_alert("Unable to switch EFI into virtual mode " |
937 | "(status=%lx)!\n", status); | |
5b83683f HY |
938 | panic("EFI call to SetVirtualAddressMap() failed!"); |
939 | } | |
940 | ||
941 | /* | |
942 | * Now that EFI is in virtual mode, update the function | |
943 | * pointers in the runtime service table to the new virtual addresses. | |
944 | * | |
945 | * Call EFI services through wrapper functions. | |
946 | */ | |
712ba9e9 | 947 | efi.runtime_version = efi_systab.hdr.revision; |
5b83683f HY |
948 | efi.get_time = virt_efi_get_time; |
949 | efi.set_time = virt_efi_set_time; | |
950 | efi.get_wakeup_time = virt_efi_get_wakeup_time; | |
951 | efi.set_wakeup_time = virt_efi_set_wakeup_time; | |
952 | efi.get_variable = virt_efi_get_variable; | |
953 | efi.get_next_variable = virt_efi_get_next_variable; | |
954 | efi.set_variable = virt_efi_set_variable; | |
955 | efi.get_next_high_mono_count = virt_efi_get_next_high_mono_count; | |
956 | efi.reset_system = virt_efi_reset_system; | |
2b5e8ef3 | 957 | efi.set_virtual_address_map = NULL; |
3b370237 MG |
958 | efi.query_variable_info = virt_efi_query_variable_info; |
959 | efi.update_capsule = virt_efi_update_capsule; | |
960 | efi.query_capsule_caps = virt_efi_query_capsule_caps; | |
4de0d4a6 HY |
961 | if (__supported_pte_mask & _PAGE_NX) |
962 | runtime_code_page_mkexec(); | |
1adbfa35 | 963 | |
7cb00b72 | 964 | kfree(new_memmap); |
5b83683f HY |
965 | } |
966 | ||
967 | /* | |
968 | * Convenience functions to obtain memory types and attributes | |
969 | */ | |
970 | u32 efi_mem_type(unsigned long phys_addr) | |
971 | { | |
972 | efi_memory_desc_t *md; | |
973 | void *p; | |
974 | ||
83e68189 MF |
975 | if (!efi_enabled(EFI_MEMMAP)) |
976 | return 0; | |
977 | ||
5b83683f HY |
978 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { |
979 | md = p; | |
980 | if ((md->phys_addr <= phys_addr) && | |
981 | (phys_addr < (md->phys_addr + | |
982 | (md->num_pages << EFI_PAGE_SHIFT)))) | |
983 | return md->type; | |
984 | } | |
985 | return 0; | |
986 | } | |
987 | ||
988 | u64 efi_mem_attributes(unsigned long phys_addr) | |
989 | { | |
990 | efi_memory_desc_t *md; | |
991 | void *p; | |
992 | ||
993 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { | |
994 | md = p; | |
995 | if ((md->phys_addr <= phys_addr) && | |
996 | (phys_addr < (md->phys_addr + | |
997 | (md->num_pages << EFI_PAGE_SHIFT)))) | |
998 | return md->attribute; | |
999 | } | |
1000 | return 0; | |
1001 | } |