Commit | Line | Data |
---|---|---|
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> | |
69c60c88 | 34 | #include <linux/export.h> |
5b83683f | 35 | #include <linux/bootmem.h> |
a9ce6bc1 | 36 | #include <linux/memblock.h> |
5b83683f HY |
37 | #include <linux/spinlock.h> |
38 | #include <linux/uaccess.h> | |
39 | #include <linux/time.h> | |
40 | #include <linux/io.h> | |
41 | #include <linux/reboot.h> | |
42 | #include <linux/bcd.h> | |
43 | ||
44 | #include <asm/setup.h> | |
45 | #include <asm/efi.h> | |
46 | #include <asm/time.h> | |
a2172e25 HY |
47 | #include <asm/cacheflush.h> |
48 | #include <asm/tlbflush.h> | |
7bd867df | 49 | #include <asm/x86_init.h> |
5b83683f HY |
50 | |
51 | #define EFI_DEBUG 1 | |
5b83683f HY |
52 | |
53 | int efi_enabled; | |
54 | EXPORT_SYMBOL(efi_enabled); | |
55 | ||
d80603c9 JB |
56 | struct efi __read_mostly efi = { |
57 | .mps = EFI_INVALID_TABLE_ADDR, | |
58 | .acpi = EFI_INVALID_TABLE_ADDR, | |
59 | .acpi20 = EFI_INVALID_TABLE_ADDR, | |
60 | .smbios = EFI_INVALID_TABLE_ADDR, | |
61 | .sal_systab = EFI_INVALID_TABLE_ADDR, | |
62 | .boot_info = EFI_INVALID_TABLE_ADDR, | |
63 | .hcdp = EFI_INVALID_TABLE_ADDR, | |
64 | .uga = EFI_INVALID_TABLE_ADDR, | |
65 | .uv_systab = EFI_INVALID_TABLE_ADDR, | |
66 | }; | |
5b83683f HY |
67 | EXPORT_SYMBOL(efi); |
68 | ||
69 | struct efi_memory_map memmap; | |
70 | ||
1adbfa35 OJ |
71 | bool efi_64bit; |
72 | static bool efi_native; | |
73 | ||
ecaea42e | 74 | static struct efi efi_phys __initdata; |
5b83683f HY |
75 | static efi_system_table_t efi_systab __initdata; |
76 | ||
8b2cb7a8 HY |
77 | static int __init setup_noefi(char *arg) |
78 | { | |
79 | efi_enabled = 0; | |
80 | return 0; | |
81 | } | |
82 | early_param("noefi", setup_noefi); | |
83 | ||
200001eb PJ |
84 | int add_efi_memmap; |
85 | EXPORT_SYMBOL(add_efi_memmap); | |
86 | ||
87 | static int __init setup_add_efi_memmap(char *arg) | |
88 | { | |
89 | add_efi_memmap = 1; | |
90 | return 0; | |
91 | } | |
92 | early_param("add_efi_memmap", setup_add_efi_memmap); | |
93 | ||
94 | ||
5b83683f HY |
95 | static efi_status_t virt_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc) |
96 | { | |
ef68c8f8 JB |
97 | unsigned long flags; |
98 | efi_status_t status; | |
99 | ||
100 | spin_lock_irqsave(&rtc_lock, flags); | |
101 | status = efi_call_virt2(get_time, tm, tc); | |
102 | spin_unlock_irqrestore(&rtc_lock, flags); | |
103 | return status; | |
5b83683f HY |
104 | } |
105 | ||
106 | static efi_status_t virt_efi_set_time(efi_time_t *tm) | |
107 | { | |
ef68c8f8 JB |
108 | unsigned long flags; |
109 | efi_status_t status; | |
110 | ||
111 | spin_lock_irqsave(&rtc_lock, flags); | |
112 | status = efi_call_virt1(set_time, tm); | |
113 | spin_unlock_irqrestore(&rtc_lock, flags); | |
114 | return status; | |
5b83683f HY |
115 | } |
116 | ||
117 | static efi_status_t virt_efi_get_wakeup_time(efi_bool_t *enabled, | |
118 | efi_bool_t *pending, | |
119 | efi_time_t *tm) | |
120 | { | |
ef68c8f8 JB |
121 | unsigned long flags; |
122 | efi_status_t status; | |
123 | ||
124 | spin_lock_irqsave(&rtc_lock, flags); | |
125 | status = efi_call_virt3(get_wakeup_time, | |
126 | enabled, pending, tm); | |
127 | spin_unlock_irqrestore(&rtc_lock, flags); | |
128 | return status; | |
5b83683f HY |
129 | } |
130 | ||
131 | static efi_status_t virt_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm) | |
132 | { | |
ef68c8f8 JB |
133 | unsigned long flags; |
134 | efi_status_t status; | |
135 | ||
136 | spin_lock_irqsave(&rtc_lock, flags); | |
137 | status = efi_call_virt2(set_wakeup_time, | |
138 | enabled, tm); | |
139 | spin_unlock_irqrestore(&rtc_lock, flags); | |
140 | return status; | |
5b83683f HY |
141 | } |
142 | ||
143 | static efi_status_t virt_efi_get_variable(efi_char16_t *name, | |
144 | efi_guid_t *vendor, | |
145 | u32 *attr, | |
146 | unsigned long *data_size, | |
147 | void *data) | |
148 | { | |
149 | return efi_call_virt5(get_variable, | |
150 | name, vendor, attr, | |
151 | data_size, data); | |
152 | } | |
153 | ||
154 | static efi_status_t virt_efi_get_next_variable(unsigned long *name_size, | |
155 | efi_char16_t *name, | |
156 | efi_guid_t *vendor) | |
157 | { | |
158 | return efi_call_virt3(get_next_variable, | |
159 | name_size, name, vendor); | |
160 | } | |
161 | ||
162 | static efi_status_t virt_efi_set_variable(efi_char16_t *name, | |
163 | efi_guid_t *vendor, | |
f7a2d73f | 164 | u32 attr, |
5b83683f HY |
165 | unsigned long data_size, |
166 | void *data) | |
167 | { | |
168 | return efi_call_virt5(set_variable, | |
169 | name, vendor, attr, | |
170 | data_size, data); | |
171 | } | |
172 | ||
3b370237 MG |
173 | static efi_status_t virt_efi_query_variable_info(u32 attr, |
174 | u64 *storage_space, | |
175 | u64 *remaining_space, | |
176 | u64 *max_variable_size) | |
177 | { | |
178 | if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION) | |
179 | return EFI_UNSUPPORTED; | |
180 | ||
181 | return efi_call_virt4(query_variable_info, attr, storage_space, | |
182 | remaining_space, max_variable_size); | |
183 | } | |
184 | ||
5b83683f HY |
185 | static efi_status_t virt_efi_get_next_high_mono_count(u32 *count) |
186 | { | |
187 | return efi_call_virt1(get_next_high_mono_count, count); | |
188 | } | |
189 | ||
190 | static void virt_efi_reset_system(int reset_type, | |
191 | efi_status_t status, | |
192 | unsigned long data_size, | |
193 | efi_char16_t *data) | |
194 | { | |
195 | efi_call_virt4(reset_system, reset_type, status, | |
196 | data_size, data); | |
197 | } | |
198 | ||
3b370237 MG |
199 | static efi_status_t virt_efi_update_capsule(efi_capsule_header_t **capsules, |
200 | unsigned long count, | |
201 | unsigned long sg_list) | |
202 | { | |
203 | if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION) | |
204 | return EFI_UNSUPPORTED; | |
205 | ||
206 | return efi_call_virt3(update_capsule, capsules, count, sg_list); | |
207 | } | |
208 | ||
209 | static efi_status_t virt_efi_query_capsule_caps(efi_capsule_header_t **capsules, | |
210 | unsigned long count, | |
211 | u64 *max_size, | |
212 | int *reset_type) | |
213 | { | |
214 | if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION) | |
215 | return EFI_UNSUPPORTED; | |
216 | ||
217 | return efi_call_virt4(query_capsule_caps, capsules, count, max_size, | |
218 | reset_type); | |
219 | } | |
220 | ||
5b83683f HY |
221 | static efi_status_t __init phys_efi_set_virtual_address_map( |
222 | unsigned long memory_map_size, | |
223 | unsigned long descriptor_size, | |
224 | u32 descriptor_version, | |
225 | efi_memory_desc_t *virtual_map) | |
226 | { | |
227 | efi_status_t status; | |
228 | ||
229 | efi_call_phys_prelog(); | |
230 | status = efi_call_phys4(efi_phys.set_virtual_address_map, | |
231 | memory_map_size, descriptor_size, | |
232 | descriptor_version, virtual_map); | |
233 | efi_call_phys_epilog(); | |
234 | return status; | |
235 | } | |
236 | ||
237 | static efi_status_t __init phys_efi_get_time(efi_time_t *tm, | |
238 | efi_time_cap_t *tc) | |
239 | { | |
ef68c8f8 | 240 | unsigned long flags; |
5b83683f HY |
241 | efi_status_t status; |
242 | ||
ef68c8f8 | 243 | spin_lock_irqsave(&rtc_lock, flags); |
5b83683f | 244 | efi_call_phys_prelog(); |
e9a9eca5 MM |
245 | status = efi_call_phys2(efi_phys.get_time, virt_to_phys(tm), |
246 | virt_to_phys(tc)); | |
5b83683f | 247 | efi_call_phys_epilog(); |
ef68c8f8 | 248 | spin_unlock_irqrestore(&rtc_lock, flags); |
5b83683f HY |
249 | return status; |
250 | } | |
251 | ||
252 | int efi_set_rtc_mmss(unsigned long nowtime) | |
253 | { | |
254 | int real_seconds, real_minutes; | |
255 | efi_status_t status; | |
256 | efi_time_t eft; | |
257 | efi_time_cap_t cap; | |
258 | ||
259 | status = efi.get_time(&eft, &cap); | |
260 | if (status != EFI_SUCCESS) { | |
e3cb3f5a | 261 | pr_err("Oops: efitime: can't read time!\n"); |
5b83683f HY |
262 | return -1; |
263 | } | |
264 | ||
265 | real_seconds = nowtime % 60; | |
266 | real_minutes = nowtime / 60; | |
267 | if (((abs(real_minutes - eft.minute) + 15)/30) & 1) | |
268 | real_minutes += 30; | |
269 | real_minutes %= 60; | |
270 | eft.minute = real_minutes; | |
271 | eft.second = real_seconds; | |
272 | ||
273 | status = efi.set_time(&eft); | |
274 | if (status != EFI_SUCCESS) { | |
e3cb3f5a | 275 | pr_err("Oops: efitime: can't write time!\n"); |
5b83683f HY |
276 | return -1; |
277 | } | |
278 | return 0; | |
279 | } | |
280 | ||
281 | unsigned long efi_get_time(void) | |
282 | { | |
283 | efi_status_t status; | |
284 | efi_time_t eft; | |
285 | efi_time_cap_t cap; | |
286 | ||
287 | status = efi.get_time(&eft, &cap); | |
288 | if (status != EFI_SUCCESS) | |
e3cb3f5a | 289 | pr_err("Oops: efitime: can't read time!\n"); |
5b83683f HY |
290 | |
291 | return mktime(eft.year, eft.month, eft.day, eft.hour, | |
292 | eft.minute, eft.second); | |
293 | } | |
294 | ||
69c91893 PJ |
295 | /* |
296 | * Tell the kernel about the EFI memory map. This might include | |
297 | * more than the max 128 entries that can fit in the e820 legacy | |
298 | * (zeropage) memory map. | |
299 | */ | |
300 | ||
200001eb | 301 | static void __init do_add_efi_memmap(void) |
69c91893 PJ |
302 | { |
303 | void *p; | |
304 | ||
305 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { | |
306 | efi_memory_desc_t *md = p; | |
307 | unsigned long long start = md->phys_addr; | |
308 | unsigned long long size = md->num_pages << EFI_PAGE_SHIFT; | |
309 | int e820_type; | |
310 | ||
e2a71476 CW |
311 | switch (md->type) { |
312 | case EFI_LOADER_CODE: | |
313 | case EFI_LOADER_DATA: | |
314 | case EFI_BOOT_SERVICES_CODE: | |
315 | case EFI_BOOT_SERVICES_DATA: | |
316 | case EFI_CONVENTIONAL_MEMORY: | |
317 | if (md->attribute & EFI_MEMORY_WB) | |
318 | e820_type = E820_RAM; | |
319 | else | |
320 | e820_type = E820_RESERVED; | |
321 | break; | |
322 | case EFI_ACPI_RECLAIM_MEMORY: | |
323 | e820_type = E820_ACPI; | |
324 | break; | |
325 | case EFI_ACPI_MEMORY_NVS: | |
326 | e820_type = E820_NVS; | |
327 | break; | |
328 | case EFI_UNUSABLE_MEMORY: | |
329 | e820_type = E820_UNUSABLE; | |
330 | break; | |
331 | default: | |
332 | /* | |
333 | * EFI_RESERVED_TYPE EFI_RUNTIME_SERVICES_CODE | |
334 | * EFI_RUNTIME_SERVICES_DATA EFI_MEMORY_MAPPED_IO | |
335 | * EFI_MEMORY_MAPPED_IO_PORT_SPACE EFI_PAL_CODE | |
336 | */ | |
69c91893 | 337 | e820_type = E820_RESERVED; |
e2a71476 CW |
338 | break; |
339 | } | |
d0be6bde | 340 | e820_add_region(start, size, e820_type); |
69c91893 PJ |
341 | } |
342 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); | |
343 | } | |
344 | ||
1adbfa35 | 345 | int __init efi_memblock_x86_reserve_range(void) |
ecacf09f HY |
346 | { |
347 | unsigned long pmap; | |
348 | ||
05486fa7 | 349 | #ifdef CONFIG_X86_32 |
1adbfa35 OJ |
350 | /* Can't handle data above 4GB at this time */ |
351 | if (boot_params.efi_info.efi_memmap_hi) { | |
352 | pr_err("Memory map is above 4GB, disabling EFI.\n"); | |
353 | return -EINVAL; | |
354 | } | |
ecacf09f | 355 | pmap = boot_params.efi_info.efi_memmap; |
05486fa7 PJ |
356 | #else |
357 | pmap = (boot_params.efi_info.efi_memmap | | |
358 | ((__u64)boot_params.efi_info.efi_memmap_hi<<32)); | |
ecacf09f HY |
359 | #endif |
360 | memmap.phys_map = (void *)pmap; | |
361 | memmap.nr_map = boot_params.efi_info.efi_memmap_size / | |
362 | boot_params.efi_info.efi_memdesc_size; | |
363 | memmap.desc_version = boot_params.efi_info.efi_memdesc_version; | |
364 | memmap.desc_size = boot_params.efi_info.efi_memdesc_size; | |
24aa0788 | 365 | memblock_reserve(pmap, memmap.nr_map * memmap.desc_size); |
1adbfa35 OJ |
366 | |
367 | return 0; | |
ecacf09f HY |
368 | } |
369 | ||
5b83683f HY |
370 | #if EFI_DEBUG |
371 | static void __init print_efi_memmap(void) | |
372 | { | |
373 | efi_memory_desc_t *md; | |
374 | void *p; | |
375 | int i; | |
376 | ||
377 | for (p = memmap.map, i = 0; | |
378 | p < memmap.map_end; | |
379 | p += memmap.desc_size, i++) { | |
380 | md = p; | |
e3cb3f5a | 381 | pr_info("mem%02u: type=%u, attr=0x%llx, " |
5b83683f HY |
382 | "range=[0x%016llx-0x%016llx) (%lluMB)\n", |
383 | i, md->type, md->attribute, md->phys_addr, | |
384 | md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT), | |
385 | (md->num_pages >> (20 - EFI_PAGE_SHIFT))); | |
386 | } | |
387 | } | |
388 | #endif /* EFI_DEBUG */ | |
389 | ||
916f676f MG |
390 | void __init efi_reserve_boot_services(void) |
391 | { | |
392 | void *p; | |
393 | ||
394 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { | |
395 | efi_memory_desc_t *md = p; | |
7d68dc3f ML |
396 | u64 start = md->phys_addr; |
397 | u64 size = md->num_pages << EFI_PAGE_SHIFT; | |
916f676f MG |
398 | |
399 | if (md->type != EFI_BOOT_SERVICES_CODE && | |
400 | md->type != EFI_BOOT_SERVICES_DATA) | |
401 | continue; | |
7d68dc3f ML |
402 | /* Only reserve where possible: |
403 | * - Not within any already allocated areas | |
404 | * - Not over any memory area (really needed, if above?) | |
405 | * - Not within any part of the kernel | |
406 | * - Not the bios reserved area | |
407 | */ | |
408 | if ((start+size >= virt_to_phys(_text) | |
409 | && start <= virt_to_phys(_end)) || | |
410 | !e820_all_mapped(start, start+size, E820_RAM) || | |
bf61549a | 411 | memblock_is_region_reserved(start, size)) { |
7d68dc3f ML |
412 | /* Could not reserve, skip it */ |
413 | md->num_pages = 0; | |
e3cb3f5a | 414 | memblock_dbg("Could not reserve boot range " |
7d68dc3f ML |
415 | "[0x%010llx-0x%010llx]\n", |
416 | start, start+size-1); | |
417 | } else | |
24aa0788 | 418 | memblock_reserve(start, size); |
916f676f MG |
419 | } |
420 | } | |
421 | ||
422 | static void __init efi_free_boot_services(void) | |
423 | { | |
424 | void *p; | |
425 | ||
426 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { | |
427 | efi_memory_desc_t *md = p; | |
428 | unsigned long long start = md->phys_addr; | |
429 | unsigned long long size = md->num_pages << EFI_PAGE_SHIFT; | |
430 | ||
431 | if (md->type != EFI_BOOT_SERVICES_CODE && | |
432 | md->type != EFI_BOOT_SERVICES_DATA) | |
433 | continue; | |
434 | ||
7d68dc3f ML |
435 | /* Could not reserve boot area */ |
436 | if (!size) | |
437 | continue; | |
438 | ||
916f676f MG |
439 | free_bootmem_late(start, size); |
440 | } | |
441 | } | |
442 | ||
140bf275 | 443 | static int __init efi_systab_init(void *phys) |
5b83683f | 444 | { |
1adbfa35 OJ |
445 | if (efi_64bit) { |
446 | efi_system_table_64_t *systab64; | |
447 | u64 tmp = 0; | |
448 | ||
449 | systab64 = early_ioremap((unsigned long)phys, | |
450 | sizeof(*systab64)); | |
451 | if (systab64 == NULL) { | |
452 | pr_err("Couldn't map the system table!\n"); | |
453 | return -ENOMEM; | |
454 | } | |
455 | ||
456 | efi_systab.hdr = systab64->hdr; | |
457 | efi_systab.fw_vendor = systab64->fw_vendor; | |
458 | tmp |= systab64->fw_vendor; | |
459 | efi_systab.fw_revision = systab64->fw_revision; | |
460 | efi_systab.con_in_handle = systab64->con_in_handle; | |
461 | tmp |= systab64->con_in_handle; | |
462 | efi_systab.con_in = systab64->con_in; | |
463 | tmp |= systab64->con_in; | |
464 | efi_systab.con_out_handle = systab64->con_out_handle; | |
465 | tmp |= systab64->con_out_handle; | |
466 | efi_systab.con_out = systab64->con_out; | |
467 | tmp |= systab64->con_out; | |
468 | efi_systab.stderr_handle = systab64->stderr_handle; | |
469 | tmp |= systab64->stderr_handle; | |
470 | efi_systab.stderr = systab64->stderr; | |
471 | tmp |= systab64->stderr; | |
472 | efi_systab.runtime = (void *)(unsigned long)systab64->runtime; | |
473 | tmp |= systab64->runtime; | |
474 | efi_systab.boottime = (void *)(unsigned long)systab64->boottime; | |
475 | tmp |= systab64->boottime; | |
476 | efi_systab.nr_tables = systab64->nr_tables; | |
477 | efi_systab.tables = systab64->tables; | |
478 | tmp |= systab64->tables; | |
479 | ||
480 | early_iounmap(systab64, sizeof(*systab64)); | |
481 | #ifdef CONFIG_X86_32 | |
482 | if (tmp >> 32) { | |
483 | pr_err("EFI data located above 4GB, disabling EFI.\n"); | |
484 | return -EINVAL; | |
485 | } | |
486 | #endif | |
487 | } else { | |
488 | efi_system_table_32_t *systab32; | |
489 | ||
490 | systab32 = early_ioremap((unsigned long)phys, | |
491 | sizeof(*systab32)); | |
492 | if (systab32 == NULL) { | |
493 | pr_err("Couldn't map the system table!\n"); | |
494 | return -ENOMEM; | |
495 | } | |
496 | ||
497 | efi_systab.hdr = systab32->hdr; | |
498 | efi_systab.fw_vendor = systab32->fw_vendor; | |
499 | efi_systab.fw_revision = systab32->fw_revision; | |
500 | efi_systab.con_in_handle = systab32->con_in_handle; | |
501 | efi_systab.con_in = systab32->con_in; | |
502 | efi_systab.con_out_handle = systab32->con_out_handle; | |
503 | efi_systab.con_out = systab32->con_out; | |
504 | efi_systab.stderr_handle = systab32->stderr_handle; | |
505 | efi_systab.stderr = systab32->stderr; | |
506 | efi_systab.runtime = (void *)(unsigned long)systab32->runtime; | |
507 | efi_systab.boottime = (void *)(unsigned long)systab32->boottime; | |
508 | efi_systab.nr_tables = systab32->nr_tables; | |
509 | efi_systab.tables = systab32->tables; | |
510 | ||
511 | early_iounmap(systab32, sizeof(*systab32)); | |
140bf275 | 512 | } |
1adbfa35 | 513 | |
5b83683f HY |
514 | efi.systab = &efi_systab; |
515 | ||
516 | /* | |
517 | * Verify the EFI Table | |
518 | */ | |
140bf275 | 519 | if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) { |
e3cb3f5a | 520 | pr_err("System table signature incorrect!\n"); |
140bf275 OJ |
521 | return -EINVAL; |
522 | } | |
5b83683f | 523 | if ((efi.systab->hdr.revision >> 16) == 0) |
e3cb3f5a | 524 | pr_err("Warning: System table version " |
5b83683f HY |
525 | "%d.%02d, expected 1.00 or greater!\n", |
526 | efi.systab->hdr.revision >> 16, | |
527 | efi.systab->hdr.revision & 0xffff); | |
140bf275 OJ |
528 | |
529 | return 0; | |
83e7ee66 | 530 | } |
5b83683f | 531 | |
140bf275 | 532 | static int __init efi_config_init(u64 tables, int nr_tables) |
83e7ee66 | 533 | { |
1adbfa35 OJ |
534 | void *config_tables, *tablep; |
535 | int i, sz; | |
536 | ||
537 | if (efi_64bit) | |
538 | sz = sizeof(efi_config_table_64_t); | |
539 | else | |
540 | sz = sizeof(efi_config_table_32_t); | |
5b83683f HY |
541 | |
542 | /* | |
543 | * Let's see what config tables the firmware passed to us. | |
544 | */ | |
1adbfa35 | 545 | config_tables = early_ioremap(tables, nr_tables * sz); |
140bf275 | 546 | if (config_tables == NULL) { |
e3cb3f5a | 547 | pr_err("Could not map Configuration table!\n"); |
140bf275 OJ |
548 | return -ENOMEM; |
549 | } | |
5b83683f | 550 | |
1adbfa35 | 551 | tablep = config_tables; |
e3cb3f5a | 552 | pr_info(""); |
5b83683f | 553 | for (i = 0; i < efi.systab->nr_tables; i++) { |
1adbfa35 OJ |
554 | efi_guid_t guid; |
555 | unsigned long table; | |
556 | ||
557 | if (efi_64bit) { | |
558 | u64 table64; | |
559 | guid = ((efi_config_table_64_t *)tablep)->guid; | |
560 | table64 = ((efi_config_table_64_t *)tablep)->table; | |
561 | table = table64; | |
562 | #ifdef CONFIG_X86_32 | |
563 | if (table64 >> 32) { | |
564 | pr_cont("\n"); | |
565 | pr_err("Table located above 4GB, disabling EFI.\n"); | |
566 | early_iounmap(config_tables, | |
567 | efi.systab->nr_tables * sz); | |
568 | return -EINVAL; | |
569 | } | |
570 | #endif | |
571 | } else { | |
572 | guid = ((efi_config_table_32_t *)tablep)->guid; | |
573 | table = ((efi_config_table_32_t *)tablep)->table; | |
574 | } | |
a6a46f41 OJ |
575 | if (!efi_guidcmp(guid, MPS_TABLE_GUID)) { |
576 | efi.mps = table; | |
577 | pr_cont(" MPS=0x%lx ", table); | |
578 | } else if (!efi_guidcmp(guid, ACPI_20_TABLE_GUID)) { | |
579 | efi.acpi20 = table; | |
580 | pr_cont(" ACPI 2.0=0x%lx ", table); | |
581 | } else if (!efi_guidcmp(guid, ACPI_TABLE_GUID)) { | |
582 | efi.acpi = table; | |
583 | pr_cont(" ACPI=0x%lx ", table); | |
584 | } else if (!efi_guidcmp(guid, SMBIOS_TABLE_GUID)) { | |
585 | efi.smbios = table; | |
586 | pr_cont(" SMBIOS=0x%lx ", table); | |
03b48632 | 587 | #ifdef CONFIG_X86_UV |
a6a46f41 OJ |
588 | } else if (!efi_guidcmp(guid, UV_SYSTEM_TABLE_GUID)) { |
589 | efi.uv_systab = table; | |
590 | pr_cont(" UVsystab=0x%lx ", table); | |
03b48632 | 591 | #endif |
a6a46f41 OJ |
592 | } else if (!efi_guidcmp(guid, HCDP_TABLE_GUID)) { |
593 | efi.hcdp = table; | |
594 | pr_cont(" HCDP=0x%lx ", table); | |
595 | } else if (!efi_guidcmp(guid, UGA_IO_PROTOCOL_GUID)) { | |
596 | efi.uga = table; | |
597 | pr_cont(" UGA=0x%lx ", table); | |
5b83683f | 598 | } |
1adbfa35 | 599 | tablep += sz; |
5b83683f | 600 | } |
e3cb3f5a | 601 | pr_cont("\n"); |
a6a46f41 | 602 | early_iounmap(config_tables, efi.systab->nr_tables * sz); |
140bf275 | 603 | return 0; |
83e7ee66 OJ |
604 | } |
605 | ||
140bf275 | 606 | static int __init efi_runtime_init(void) |
83e7ee66 OJ |
607 | { |
608 | efi_runtime_services_t *runtime; | |
5b83683f HY |
609 | |
610 | /* | |
611 | * Check out the runtime services table. We need to map | |
612 | * the runtime services table so that we can grab the physical | |
613 | * address of several of the EFI runtime functions, needed to | |
614 | * set the firmware into virtual mode. | |
615 | */ | |
beacfaac HY |
616 | runtime = early_ioremap((unsigned long)efi.systab->runtime, |
617 | sizeof(efi_runtime_services_t)); | |
140bf275 | 618 | if (!runtime) { |
e3cb3f5a | 619 | pr_err("Could not map the runtime service table!\n"); |
140bf275 OJ |
620 | return -ENOMEM; |
621 | } | |
622 | /* | |
623 | * We will only need *early* access to the following | |
624 | * two EFI runtime services before set_virtual_address_map | |
625 | * is invoked. | |
626 | */ | |
627 | efi_phys.get_time = (efi_get_time_t *)runtime->get_time; | |
628 | efi_phys.set_virtual_address_map = | |
629 | (efi_set_virtual_address_map_t *) | |
630 | runtime->set_virtual_address_map; | |
631 | /* | |
632 | * Make efi_get_time can be called before entering | |
633 | * virtual mode. | |
634 | */ | |
635 | efi.get_time = phys_efi_get_time; | |
beacfaac | 636 | early_iounmap(runtime, sizeof(efi_runtime_services_t)); |
140bf275 OJ |
637 | |
638 | return 0; | |
83e7ee66 | 639 | } |
5b83683f | 640 | |
140bf275 | 641 | static int __init efi_memmap_init(void) |
83e7ee66 | 642 | { |
5b83683f | 643 | /* Map the EFI memory map */ |
beacfaac HY |
644 | memmap.map = early_ioremap((unsigned long)memmap.phys_map, |
645 | memmap.nr_map * memmap.desc_size); | |
140bf275 | 646 | if (memmap.map == NULL) { |
e3cb3f5a | 647 | pr_err("Could not map the memory map!\n"); |
140bf275 OJ |
648 | return -ENOMEM; |
649 | } | |
5b83683f | 650 | memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size); |
175e438f | 651 | |
200001eb PJ |
652 | if (add_efi_memmap) |
653 | do_add_efi_memmap(); | |
140bf275 OJ |
654 | |
655 | return 0; | |
83e7ee66 OJ |
656 | } |
657 | ||
658 | void __init efi_init(void) | |
659 | { | |
660 | efi_char16_t *c16; | |
661 | char vendor[100] = "unknown"; | |
662 | int i = 0; | |
663 | void *tmp; | |
664 | ||
665 | #ifdef CONFIG_X86_32 | |
1adbfa35 OJ |
666 | if (boot_params.efi_info.efi_systab_hi || |
667 | boot_params.efi_info.efi_memmap_hi) { | |
668 | pr_info("Table located above 4GB, disabling EFI.\n"); | |
669 | efi_enabled = 0; | |
670 | return; | |
671 | } | |
83e7ee66 | 672 | efi_phys.systab = (efi_system_table_t *)boot_params.efi_info.efi_systab; |
1adbfa35 | 673 | efi_native = !efi_64bit; |
83e7ee66 OJ |
674 | #else |
675 | efi_phys.systab = (efi_system_table_t *) | |
1adbfa35 OJ |
676 | (boot_params.efi_info.efi_systab | |
677 | ((__u64)boot_params.efi_info.efi_systab_hi<<32)); | |
678 | efi_native = efi_64bit; | |
83e7ee66 OJ |
679 | #endif |
680 | ||
140bf275 OJ |
681 | if (efi_systab_init(efi_phys.systab)) { |
682 | efi_enabled = 0; | |
683 | return; | |
684 | } | |
83e7ee66 OJ |
685 | |
686 | /* | |
687 | * Show what we know for posterity | |
688 | */ | |
689 | c16 = tmp = early_ioremap(efi.systab->fw_vendor, 2); | |
690 | if (c16) { | |
691 | for (i = 0; i < sizeof(vendor) - 1 && *c16; ++i) | |
692 | vendor[i] = *c16++; | |
693 | vendor[i] = '\0'; | |
694 | } else | |
e3cb3f5a | 695 | pr_err("Could not map the firmware vendor!\n"); |
83e7ee66 OJ |
696 | early_iounmap(tmp, 2); |
697 | ||
e3cb3f5a OJ |
698 | pr_info("EFI v%u.%.02u by %s\n", |
699 | efi.systab->hdr.revision >> 16, | |
700 | efi.systab->hdr.revision & 0xffff, vendor); | |
83e7ee66 | 701 | |
140bf275 OJ |
702 | if (efi_config_init(efi.systab->tables, efi.systab->nr_tables)) { |
703 | efi_enabled = 0; | |
704 | return; | |
705 | } | |
83e7ee66 | 706 | |
1adbfa35 OJ |
707 | /* |
708 | * Note: We currently don't support runtime services on an EFI | |
709 | * that doesn't match the kernel 32/64-bit mode. | |
710 | */ | |
711 | ||
712 | if (!efi_native) | |
713 | pr_info("No EFI runtime due to 32/64-bit mismatch with kernel\n"); | |
714 | else if (efi_runtime_init()) { | |
140bf275 OJ |
715 | efi_enabled = 0; |
716 | return; | |
717 | } | |
83e7ee66 | 718 | |
140bf275 OJ |
719 | if (efi_memmap_init()) { |
720 | efi_enabled = 0; | |
721 | return; | |
722 | } | |
772be899 | 723 | #ifdef CONFIG_X86_32 |
1adbfa35 OJ |
724 | if (efi_native) { |
725 | x86_platform.get_wallclock = efi_get_time; | |
726 | x86_platform.set_wallclock = efi_set_rtc_mmss; | |
727 | } | |
772be899 | 728 | #endif |
7bd867df | 729 | |
5b83683f HY |
730 | #if EFI_DEBUG |
731 | print_efi_memmap(); | |
732 | #endif | |
733 | } | |
734 | ||
9cd2b07c MG |
735 | void __init efi_set_executable(efi_memory_desc_t *md, bool executable) |
736 | { | |
737 | u64 addr, npages; | |
738 | ||
739 | addr = md->virt_addr; | |
740 | npages = md->num_pages; | |
741 | ||
742 | memrange_efi_to_native(&addr, &npages); | |
743 | ||
744 | if (executable) | |
745 | set_memory_x(addr, npages); | |
746 | else | |
747 | set_memory_nx(addr, npages); | |
748 | } | |
749 | ||
a2172e25 HY |
750 | static void __init runtime_code_page_mkexec(void) |
751 | { | |
752 | efi_memory_desc_t *md; | |
a2172e25 HY |
753 | void *p; |
754 | ||
a2172e25 HY |
755 | /* Make EFI runtime service code area executable */ |
756 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { | |
757 | md = p; | |
1c083eb2 HY |
758 | |
759 | if (md->type != EFI_RUNTIME_SERVICES_CODE) | |
760 | continue; | |
761 | ||
9cd2b07c | 762 | efi_set_executable(md, true); |
a2172e25 | 763 | } |
a2172e25 | 764 | } |
a2172e25 | 765 | |
5b83683f HY |
766 | /* |
767 | * This function will switch the EFI runtime services to virtual mode. | |
768 | * Essentially, look through the EFI memmap and map every region that | |
769 | * has the runtime attribute bit set in its memory descriptor and update | |
770 | * that memory descriptor with the virtual address obtained from ioremap(). | |
771 | * This enables the runtime services to be called without having to | |
772 | * thunk back into physical mode for every invocation. | |
773 | */ | |
774 | void __init efi_enter_virtual_mode(void) | |
775 | { | |
202f9d0a | 776 | efi_memory_desc_t *md, *prev_md = NULL; |
5b83683f | 777 | efi_status_t status; |
1c083eb2 | 778 | unsigned long size; |
dd39ecf5 | 779 | u64 end, systab, addr, npages, end_pfn; |
7cb00b72 MG |
780 | void *p, *va, *new_memmap = NULL; |
781 | int count = 0; | |
5b83683f HY |
782 | |
783 | efi.systab = NULL; | |
202f9d0a | 784 | |
1adbfa35 OJ |
785 | /* |
786 | * We don't do virtual mode, since we don't do runtime services, on | |
787 | * non-native EFI | |
788 | */ | |
789 | ||
790 | if (!efi_native) | |
791 | goto out; | |
792 | ||
202f9d0a MG |
793 | /* Merge contiguous regions of the same type and attribute */ |
794 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { | |
795 | u64 prev_size; | |
796 | md = p; | |
797 | ||
798 | if (!prev_md) { | |
799 | prev_md = md; | |
800 | continue; | |
801 | } | |
802 | ||
803 | if (prev_md->type != md->type || | |
804 | prev_md->attribute != md->attribute) { | |
805 | prev_md = md; | |
806 | continue; | |
807 | } | |
808 | ||
809 | prev_size = prev_md->num_pages << EFI_PAGE_SHIFT; | |
810 | ||
811 | if (md->phys_addr == (prev_md->phys_addr + prev_size)) { | |
812 | prev_md->num_pages += md->num_pages; | |
813 | md->type = EFI_RESERVED_TYPE; | |
814 | md->attribute = 0; | |
815 | continue; | |
816 | } | |
817 | prev_md = md; | |
818 | } | |
819 | ||
5b83683f HY |
820 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { |
821 | md = p; | |
916f676f MG |
822 | if (!(md->attribute & EFI_MEMORY_RUNTIME) && |
823 | md->type != EFI_BOOT_SERVICES_CODE && | |
824 | md->type != EFI_BOOT_SERVICES_DATA) | |
5b83683f | 825 | continue; |
1c083eb2 HY |
826 | |
827 | size = md->num_pages << EFI_PAGE_SHIFT; | |
828 | end = md->phys_addr + size; | |
829 | ||
dd39ecf5 HY |
830 | end_pfn = PFN_UP(end); |
831 | if (end_pfn <= max_low_pfn_mapped | |
832 | || (end_pfn > (1UL << (32 - PAGE_SHIFT)) | |
833 | && end_pfn <= max_pfn_mapped)) | |
1c083eb2 | 834 | va = __va(md->phys_addr); |
5b83683f | 835 | else |
6a7bbd57 | 836 | va = efi_ioremap(md->phys_addr, size, md->type); |
1c083eb2 | 837 | |
1c083eb2 HY |
838 | md->virt_addr = (u64) (unsigned long) va; |
839 | ||
840 | if (!va) { | |
e3cb3f5a | 841 | pr_err("ioremap of 0x%llX failed!\n", |
5b83683f | 842 | (unsigned long long)md->phys_addr); |
1c083eb2 HY |
843 | continue; |
844 | } | |
845 | ||
4a3575fd HY |
846 | if (!(md->attribute & EFI_MEMORY_WB)) { |
847 | addr = md->virt_addr; | |
848 | npages = md->num_pages; | |
849 | memrange_efi_to_native(&addr, &npages); | |
850 | set_memory_uc(addr, npages); | |
851 | } | |
e85f2051 | 852 | |
1c083eb2 HY |
853 | systab = (u64) (unsigned long) efi_phys.systab; |
854 | if (md->phys_addr <= systab && systab < end) { | |
855 | systab += md->virt_addr - md->phys_addr; | |
856 | efi.systab = (efi_system_table_t *) (unsigned long) systab; | |
857 | } | |
7cb00b72 MG |
858 | new_memmap = krealloc(new_memmap, |
859 | (count + 1) * memmap.desc_size, | |
860 | GFP_KERNEL); | |
861 | memcpy(new_memmap + (count * memmap.desc_size), md, | |
862 | memmap.desc_size); | |
863 | count++; | |
5b83683f HY |
864 | } |
865 | ||
866 | BUG_ON(!efi.systab); | |
867 | ||
868 | status = phys_efi_set_virtual_address_map( | |
7cb00b72 | 869 | memmap.desc_size * count, |
5b83683f HY |
870 | memmap.desc_size, |
871 | memmap.desc_version, | |
7cb00b72 | 872 | (efi_memory_desc_t *)__pa(new_memmap)); |
5b83683f HY |
873 | |
874 | if (status != EFI_SUCCESS) { | |
e3cb3f5a OJ |
875 | pr_alert("Unable to switch EFI into virtual mode " |
876 | "(status=%lx)!\n", status); | |
5b83683f HY |
877 | panic("EFI call to SetVirtualAddressMap() failed!"); |
878 | } | |
879 | ||
916f676f MG |
880 | /* |
881 | * Thankfully, it does seem that no runtime services other than | |
882 | * SetVirtualAddressMap() will touch boot services code, so we can | |
883 | * get rid of it all at this point | |
884 | */ | |
885 | efi_free_boot_services(); | |
886 | ||
5b83683f HY |
887 | /* |
888 | * Now that EFI is in virtual mode, update the function | |
889 | * pointers in the runtime service table to the new virtual addresses. | |
890 | * | |
891 | * Call EFI services through wrapper functions. | |
892 | */ | |
893 | efi.get_time = virt_efi_get_time; | |
894 | efi.set_time = virt_efi_set_time; | |
895 | efi.get_wakeup_time = virt_efi_get_wakeup_time; | |
896 | efi.set_wakeup_time = virt_efi_set_wakeup_time; | |
897 | efi.get_variable = virt_efi_get_variable; | |
898 | efi.get_next_variable = virt_efi_get_next_variable; | |
899 | efi.set_variable = virt_efi_set_variable; | |
900 | efi.get_next_high_mono_count = virt_efi_get_next_high_mono_count; | |
901 | efi.reset_system = virt_efi_reset_system; | |
2b5e8ef3 | 902 | efi.set_virtual_address_map = NULL; |
3b370237 MG |
903 | efi.query_variable_info = virt_efi_query_variable_info; |
904 | efi.update_capsule = virt_efi_update_capsule; | |
905 | efi.query_capsule_caps = virt_efi_query_capsule_caps; | |
4de0d4a6 HY |
906 | if (__supported_pte_mask & _PAGE_NX) |
907 | runtime_code_page_mkexec(); | |
1adbfa35 OJ |
908 | |
909 | out: | |
a3828064 HY |
910 | early_iounmap(memmap.map, memmap.nr_map * memmap.desc_size); |
911 | memmap.map = NULL; | |
7cb00b72 | 912 | kfree(new_memmap); |
5b83683f HY |
913 | } |
914 | ||
915 | /* | |
916 | * Convenience functions to obtain memory types and attributes | |
917 | */ | |
918 | u32 efi_mem_type(unsigned long phys_addr) | |
919 | { | |
920 | efi_memory_desc_t *md; | |
921 | void *p; | |
922 | ||
923 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { | |
924 | md = p; | |
925 | if ((md->phys_addr <= phys_addr) && | |
926 | (phys_addr < (md->phys_addr + | |
927 | (md->num_pages << EFI_PAGE_SHIFT)))) | |
928 | return md->type; | |
929 | } | |
930 | return 0; | |
931 | } | |
932 | ||
933 | u64 efi_mem_attributes(unsigned long phys_addr) | |
934 | { | |
935 | efi_memory_desc_t *md; | |
936 | void *p; | |
937 | ||
938 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { | |
939 | md = p; | |
940 | if ((md->phys_addr <= phys_addr) && | |
941 | (phys_addr < (md->phys_addr + | |
942 | (md->num_pages << EFI_PAGE_SHIFT)))) | |
943 | return md->attribute; | |
944 | } | |
945 | return 0; | |
946 | } |