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 | ||
29 | #include <linux/kernel.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/efi.h> | |
32 | #include <linux/bootmem.h> | |
a9ce6bc1 | 33 | #include <linux/memblock.h> |
5b83683f HY |
34 | #include <linux/spinlock.h> |
35 | #include <linux/uaccess.h> | |
36 | #include <linux/time.h> | |
37 | #include <linux/io.h> | |
38 | #include <linux/reboot.h> | |
39 | #include <linux/bcd.h> | |
40 | ||
41 | #include <asm/setup.h> | |
42 | #include <asm/efi.h> | |
43 | #include <asm/time.h> | |
a2172e25 HY |
44 | #include <asm/cacheflush.h> |
45 | #include <asm/tlbflush.h> | |
7bd867df | 46 | #include <asm/x86_init.h> |
5b83683f HY |
47 | |
48 | #define EFI_DEBUG 1 | |
49 | #define PFX "EFI: " | |
50 | ||
51 | int efi_enabled; | |
52 | EXPORT_SYMBOL(efi_enabled); | |
53 | ||
54 | struct efi efi; | |
55 | EXPORT_SYMBOL(efi); | |
56 | ||
57 | struct efi_memory_map memmap; | |
58 | ||
ecaea42e | 59 | static struct efi efi_phys __initdata; |
5b83683f HY |
60 | static efi_system_table_t efi_systab __initdata; |
61 | ||
8b2cb7a8 HY |
62 | static int __init setup_noefi(char *arg) |
63 | { | |
64 | efi_enabled = 0; | |
65 | return 0; | |
66 | } | |
67 | early_param("noefi", setup_noefi); | |
68 | ||
200001eb PJ |
69 | int add_efi_memmap; |
70 | EXPORT_SYMBOL(add_efi_memmap); | |
71 | ||
72 | static int __init setup_add_efi_memmap(char *arg) | |
73 | { | |
74 | add_efi_memmap = 1; | |
75 | return 0; | |
76 | } | |
77 | early_param("add_efi_memmap", setup_add_efi_memmap); | |
78 | ||
79 | ||
5b83683f HY |
80 | static efi_status_t virt_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc) |
81 | { | |
82 | return efi_call_virt2(get_time, tm, tc); | |
83 | } | |
84 | ||
85 | static efi_status_t virt_efi_set_time(efi_time_t *tm) | |
86 | { | |
87 | return efi_call_virt1(set_time, tm); | |
88 | } | |
89 | ||
90 | static efi_status_t virt_efi_get_wakeup_time(efi_bool_t *enabled, | |
91 | efi_bool_t *pending, | |
92 | efi_time_t *tm) | |
93 | { | |
94 | return efi_call_virt3(get_wakeup_time, | |
95 | enabled, pending, tm); | |
96 | } | |
97 | ||
98 | static efi_status_t virt_efi_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm) | |
99 | { | |
100 | return efi_call_virt2(set_wakeup_time, | |
101 | enabled, tm); | |
102 | } | |
103 | ||
104 | static efi_status_t virt_efi_get_variable(efi_char16_t *name, | |
105 | efi_guid_t *vendor, | |
106 | u32 *attr, | |
107 | unsigned long *data_size, | |
108 | void *data) | |
109 | { | |
110 | return efi_call_virt5(get_variable, | |
111 | name, vendor, attr, | |
112 | data_size, data); | |
113 | } | |
114 | ||
115 | static efi_status_t virt_efi_get_next_variable(unsigned long *name_size, | |
116 | efi_char16_t *name, | |
117 | efi_guid_t *vendor) | |
118 | { | |
119 | return efi_call_virt3(get_next_variable, | |
120 | name_size, name, vendor); | |
121 | } | |
122 | ||
123 | static efi_status_t virt_efi_set_variable(efi_char16_t *name, | |
124 | efi_guid_t *vendor, | |
125 | unsigned long attr, | |
126 | unsigned long data_size, | |
127 | void *data) | |
128 | { | |
129 | return efi_call_virt5(set_variable, | |
130 | name, vendor, attr, | |
131 | data_size, data); | |
132 | } | |
133 | ||
134 | static efi_status_t virt_efi_get_next_high_mono_count(u32 *count) | |
135 | { | |
136 | return efi_call_virt1(get_next_high_mono_count, count); | |
137 | } | |
138 | ||
139 | static void virt_efi_reset_system(int reset_type, | |
140 | efi_status_t status, | |
141 | unsigned long data_size, | |
142 | efi_char16_t *data) | |
143 | { | |
144 | efi_call_virt4(reset_system, reset_type, status, | |
145 | data_size, data); | |
146 | } | |
147 | ||
5b83683f HY |
148 | static efi_status_t __init phys_efi_set_virtual_address_map( |
149 | unsigned long memory_map_size, | |
150 | unsigned long descriptor_size, | |
151 | u32 descriptor_version, | |
152 | efi_memory_desc_t *virtual_map) | |
153 | { | |
154 | efi_status_t status; | |
155 | ||
156 | efi_call_phys_prelog(); | |
157 | status = efi_call_phys4(efi_phys.set_virtual_address_map, | |
158 | memory_map_size, descriptor_size, | |
159 | descriptor_version, virtual_map); | |
160 | efi_call_phys_epilog(); | |
161 | return status; | |
162 | } | |
163 | ||
164 | static efi_status_t __init phys_efi_get_time(efi_time_t *tm, | |
165 | efi_time_cap_t *tc) | |
166 | { | |
167 | efi_status_t status; | |
168 | ||
169 | efi_call_phys_prelog(); | |
170 | status = efi_call_phys2(efi_phys.get_time, tm, tc); | |
171 | efi_call_phys_epilog(); | |
172 | return status; | |
173 | } | |
174 | ||
175 | int efi_set_rtc_mmss(unsigned long nowtime) | |
176 | { | |
177 | int real_seconds, real_minutes; | |
178 | efi_status_t status; | |
179 | efi_time_t eft; | |
180 | efi_time_cap_t cap; | |
181 | ||
182 | status = efi.get_time(&eft, &cap); | |
183 | if (status != EFI_SUCCESS) { | |
184 | printk(KERN_ERR "Oops: efitime: can't read time!\n"); | |
185 | return -1; | |
186 | } | |
187 | ||
188 | real_seconds = nowtime % 60; | |
189 | real_minutes = nowtime / 60; | |
190 | if (((abs(real_minutes - eft.minute) + 15)/30) & 1) | |
191 | real_minutes += 30; | |
192 | real_minutes %= 60; | |
193 | eft.minute = real_minutes; | |
194 | eft.second = real_seconds; | |
195 | ||
196 | status = efi.set_time(&eft); | |
197 | if (status != EFI_SUCCESS) { | |
198 | printk(KERN_ERR "Oops: efitime: can't write time!\n"); | |
199 | return -1; | |
200 | } | |
201 | return 0; | |
202 | } | |
203 | ||
204 | unsigned long efi_get_time(void) | |
205 | { | |
206 | efi_status_t status; | |
207 | efi_time_t eft; | |
208 | efi_time_cap_t cap; | |
209 | ||
210 | status = efi.get_time(&eft, &cap); | |
211 | if (status != EFI_SUCCESS) | |
212 | printk(KERN_ERR "Oops: efitime: can't read time!\n"); | |
213 | ||
214 | return mktime(eft.year, eft.month, eft.day, eft.hour, | |
215 | eft.minute, eft.second); | |
216 | } | |
217 | ||
69c91893 PJ |
218 | /* |
219 | * Tell the kernel about the EFI memory map. This might include | |
220 | * more than the max 128 entries that can fit in the e820 legacy | |
221 | * (zeropage) memory map. | |
222 | */ | |
223 | ||
200001eb | 224 | static void __init do_add_efi_memmap(void) |
69c91893 PJ |
225 | { |
226 | void *p; | |
227 | ||
228 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { | |
229 | efi_memory_desc_t *md = p; | |
230 | unsigned long long start = md->phys_addr; | |
231 | unsigned long long size = md->num_pages << EFI_PAGE_SHIFT; | |
232 | int e820_type; | |
233 | ||
e2a71476 CW |
234 | switch (md->type) { |
235 | case EFI_LOADER_CODE: | |
236 | case EFI_LOADER_DATA: | |
237 | case EFI_BOOT_SERVICES_CODE: | |
238 | case EFI_BOOT_SERVICES_DATA: | |
239 | case EFI_CONVENTIONAL_MEMORY: | |
240 | if (md->attribute & EFI_MEMORY_WB) | |
241 | e820_type = E820_RAM; | |
242 | else | |
243 | e820_type = E820_RESERVED; | |
244 | break; | |
245 | case EFI_ACPI_RECLAIM_MEMORY: | |
246 | e820_type = E820_ACPI; | |
247 | break; | |
248 | case EFI_ACPI_MEMORY_NVS: | |
249 | e820_type = E820_NVS; | |
250 | break; | |
251 | case EFI_UNUSABLE_MEMORY: | |
252 | e820_type = E820_UNUSABLE; | |
253 | break; | |
254 | default: | |
255 | /* | |
256 | * EFI_RESERVED_TYPE EFI_RUNTIME_SERVICES_CODE | |
257 | * EFI_RUNTIME_SERVICES_DATA EFI_MEMORY_MAPPED_IO | |
258 | * EFI_MEMORY_MAPPED_IO_PORT_SPACE EFI_PAL_CODE | |
259 | */ | |
69c91893 | 260 | e820_type = E820_RESERVED; |
e2a71476 CW |
261 | break; |
262 | } | |
d0be6bde | 263 | e820_add_region(start, size, e820_type); |
69c91893 PJ |
264 | } |
265 | sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); | |
266 | } | |
267 | ||
a9ce6bc1 | 268 | void __init efi_memblock_x86_reserve_range(void) |
ecacf09f HY |
269 | { |
270 | unsigned long pmap; | |
271 | ||
05486fa7 | 272 | #ifdef CONFIG_X86_32 |
ecacf09f | 273 | pmap = boot_params.efi_info.efi_memmap; |
05486fa7 PJ |
274 | #else |
275 | pmap = (boot_params.efi_info.efi_memmap | | |
276 | ((__u64)boot_params.efi_info.efi_memmap_hi<<32)); | |
ecacf09f HY |
277 | #endif |
278 | memmap.phys_map = (void *)pmap; | |
279 | memmap.nr_map = boot_params.efi_info.efi_memmap_size / | |
280 | boot_params.efi_info.efi_memdesc_size; | |
281 | memmap.desc_version = boot_params.efi_info.efi_memdesc_version; | |
282 | memmap.desc_size = boot_params.efi_info.efi_memdesc_size; | |
a9ce6bc1 | 283 | memblock_x86_reserve_range(pmap, pmap + memmap.nr_map * memmap.desc_size, |
ecacf09f HY |
284 | "EFI memmap"); |
285 | } | |
286 | ||
5b83683f HY |
287 | #if EFI_DEBUG |
288 | static void __init print_efi_memmap(void) | |
289 | { | |
290 | efi_memory_desc_t *md; | |
291 | void *p; | |
292 | int i; | |
293 | ||
294 | for (p = memmap.map, i = 0; | |
295 | p < memmap.map_end; | |
296 | p += memmap.desc_size, i++) { | |
297 | md = p; | |
298 | printk(KERN_INFO PFX "mem%02u: type=%u, attr=0x%llx, " | |
299 | "range=[0x%016llx-0x%016llx) (%lluMB)\n", | |
300 | i, md->type, md->attribute, md->phys_addr, | |
301 | md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT), | |
302 | (md->num_pages >> (20 - EFI_PAGE_SHIFT))); | |
303 | } | |
304 | } | |
305 | #endif /* EFI_DEBUG */ | |
306 | ||
307 | void __init efi_init(void) | |
308 | { | |
309 | efi_config_table_t *config_tables; | |
310 | efi_runtime_services_t *runtime; | |
311 | efi_char16_t *c16; | |
312 | char vendor[100] = "unknown"; | |
313 | int i = 0; | |
314 | void *tmp; | |
315 | ||
05486fa7 | 316 | #ifdef CONFIG_X86_32 |
5b83683f | 317 | efi_phys.systab = (efi_system_table_t *)boot_params.efi_info.efi_systab; |
05486fa7 PJ |
318 | #else |
319 | efi_phys.systab = (efi_system_table_t *) | |
320 | (boot_params.efi_info.efi_systab | | |
321 | ((__u64)boot_params.efi_info.efi_systab_hi<<32)); | |
5b83683f | 322 | #endif |
5b83683f | 323 | |
beacfaac HY |
324 | efi.systab = early_ioremap((unsigned long)efi_phys.systab, |
325 | sizeof(efi_system_table_t)); | |
5b83683f HY |
326 | if (efi.systab == NULL) |
327 | printk(KERN_ERR "Couldn't map the EFI system table!\n"); | |
328 | memcpy(&efi_systab, efi.systab, sizeof(efi_system_table_t)); | |
beacfaac | 329 | early_iounmap(efi.systab, sizeof(efi_system_table_t)); |
5b83683f HY |
330 | efi.systab = &efi_systab; |
331 | ||
332 | /* | |
333 | * Verify the EFI Table | |
334 | */ | |
335 | if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) | |
336 | printk(KERN_ERR "EFI system table signature incorrect!\n"); | |
337 | if ((efi.systab->hdr.revision >> 16) == 0) | |
338 | printk(KERN_ERR "Warning: EFI system table version " | |
339 | "%d.%02d, expected 1.00 or greater!\n", | |
340 | efi.systab->hdr.revision >> 16, | |
341 | efi.systab->hdr.revision & 0xffff); | |
342 | ||
343 | /* | |
344 | * Show what we know for posterity | |
345 | */ | |
beacfaac | 346 | c16 = tmp = early_ioremap(efi.systab->fw_vendor, 2); |
5b83683f | 347 | if (c16) { |
fdb8a427 | 348 | for (i = 0; i < sizeof(vendor) - 1 && *c16; ++i) |
5b83683f HY |
349 | vendor[i] = *c16++; |
350 | vendor[i] = '\0'; | |
351 | } else | |
352 | printk(KERN_ERR PFX "Could not map the firmware vendor!\n"); | |
beacfaac | 353 | early_iounmap(tmp, 2); |
5b83683f | 354 | |
3235dc3f | 355 | printk(KERN_INFO "EFI v%u.%.02u by %s\n", |
5b83683f HY |
356 | efi.systab->hdr.revision >> 16, |
357 | efi.systab->hdr.revision & 0xffff, vendor); | |
358 | ||
359 | /* | |
360 | * Let's see what config tables the firmware passed to us. | |
361 | */ | |
beacfaac | 362 | config_tables = early_ioremap( |
5b83683f HY |
363 | efi.systab->tables, |
364 | efi.systab->nr_tables * sizeof(efi_config_table_t)); | |
365 | if (config_tables == NULL) | |
366 | printk(KERN_ERR "Could not map EFI Configuration Table!\n"); | |
367 | ||
368 | printk(KERN_INFO); | |
369 | for (i = 0; i < efi.systab->nr_tables; i++) { | |
370 | if (!efi_guidcmp(config_tables[i].guid, MPS_TABLE_GUID)) { | |
371 | efi.mps = config_tables[i].table; | |
372 | printk(" MPS=0x%lx ", config_tables[i].table); | |
373 | } else if (!efi_guidcmp(config_tables[i].guid, | |
374 | ACPI_20_TABLE_GUID)) { | |
375 | efi.acpi20 = config_tables[i].table; | |
376 | printk(" ACPI 2.0=0x%lx ", config_tables[i].table); | |
377 | } else if (!efi_guidcmp(config_tables[i].guid, | |
378 | ACPI_TABLE_GUID)) { | |
379 | efi.acpi = config_tables[i].table; | |
380 | printk(" ACPI=0x%lx ", config_tables[i].table); | |
381 | } else if (!efi_guidcmp(config_tables[i].guid, | |
382 | SMBIOS_TABLE_GUID)) { | |
383 | efi.smbios = config_tables[i].table; | |
384 | printk(" SMBIOS=0x%lx ", config_tables[i].table); | |
03b48632 | 385 | #ifdef CONFIG_X86_UV |
a50f70b1 RA |
386 | } else if (!efi_guidcmp(config_tables[i].guid, |
387 | UV_SYSTEM_TABLE_GUID)) { | |
388 | efi.uv_systab = config_tables[i].table; | |
389 | printk(" UVsystab=0x%lx ", config_tables[i].table); | |
03b48632 | 390 | #endif |
5b83683f HY |
391 | } else if (!efi_guidcmp(config_tables[i].guid, |
392 | HCDP_TABLE_GUID)) { | |
393 | efi.hcdp = config_tables[i].table; | |
394 | printk(" HCDP=0x%lx ", config_tables[i].table); | |
395 | } else if (!efi_guidcmp(config_tables[i].guid, | |
396 | UGA_IO_PROTOCOL_GUID)) { | |
397 | efi.uga = config_tables[i].table; | |
398 | printk(" UGA=0x%lx ", config_tables[i].table); | |
399 | } | |
400 | } | |
401 | printk("\n"); | |
beacfaac | 402 | early_iounmap(config_tables, |
5b83683f HY |
403 | efi.systab->nr_tables * sizeof(efi_config_table_t)); |
404 | ||
405 | /* | |
406 | * Check out the runtime services table. We need to map | |
407 | * the runtime services table so that we can grab the physical | |
408 | * address of several of the EFI runtime functions, needed to | |
409 | * set the firmware into virtual mode. | |
410 | */ | |
beacfaac HY |
411 | runtime = early_ioremap((unsigned long)efi.systab->runtime, |
412 | sizeof(efi_runtime_services_t)); | |
5b83683f HY |
413 | if (runtime != NULL) { |
414 | /* | |
415 | * We will only need *early* access to the following | |
416 | * two EFI runtime services before set_virtual_address_map | |
417 | * is invoked. | |
418 | */ | |
419 | efi_phys.get_time = (efi_get_time_t *)runtime->get_time; | |
420 | efi_phys.set_virtual_address_map = | |
421 | (efi_set_virtual_address_map_t *) | |
422 | runtime->set_virtual_address_map; | |
423 | /* | |
424 | * Make efi_get_time can be called before entering | |
425 | * virtual mode. | |
426 | */ | |
427 | efi.get_time = phys_efi_get_time; | |
428 | } else | |
429 | printk(KERN_ERR "Could not map the EFI runtime service " | |
430 | "table!\n"); | |
beacfaac | 431 | early_iounmap(runtime, sizeof(efi_runtime_services_t)); |
5b83683f HY |
432 | |
433 | /* Map the EFI memory map */ | |
beacfaac HY |
434 | memmap.map = early_ioremap((unsigned long)memmap.phys_map, |
435 | memmap.nr_map * memmap.desc_size); | |
5b83683f HY |
436 | if (memmap.map == NULL) |
437 | printk(KERN_ERR "Could not map the EFI memory map!\n"); | |
438 | memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size); | |
175e438f | 439 | |
5b83683f | 440 | if (memmap.desc_size != sizeof(efi_memory_desc_t)) |
175e438f RA |
441 | printk(KERN_WARNING |
442 | "Kernel-defined memdesc doesn't match the one from EFI!\n"); | |
443 | ||
200001eb PJ |
444 | if (add_efi_memmap) |
445 | do_add_efi_memmap(); | |
5b83683f | 446 | |
772be899 | 447 | #ifdef CONFIG_X86_32 |
7bd867df FT |
448 | x86_platform.get_wallclock = efi_get_time; |
449 | x86_platform.set_wallclock = efi_set_rtc_mmss; | |
772be899 | 450 | #endif |
7bd867df | 451 | |
5b83683f HY |
452 | /* Setup for EFI runtime service */ |
453 | reboot_type = BOOT_EFI; | |
454 | ||
5b83683f HY |
455 | #if EFI_DEBUG |
456 | print_efi_memmap(); | |
457 | #endif | |
458 | } | |
459 | ||
9cd2b07c MG |
460 | void __init efi_set_executable(efi_memory_desc_t *md, bool executable) |
461 | { | |
462 | u64 addr, npages; | |
463 | ||
464 | addr = md->virt_addr; | |
465 | npages = md->num_pages; | |
466 | ||
467 | memrange_efi_to_native(&addr, &npages); | |
468 | ||
469 | if (executable) | |
470 | set_memory_x(addr, npages); | |
471 | else | |
472 | set_memory_nx(addr, npages); | |
473 | } | |
474 | ||
a2172e25 HY |
475 | static void __init runtime_code_page_mkexec(void) |
476 | { | |
477 | efi_memory_desc_t *md; | |
a2172e25 HY |
478 | void *p; |
479 | ||
a2172e25 HY |
480 | /* Make EFI runtime service code area executable */ |
481 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { | |
482 | md = p; | |
1c083eb2 HY |
483 | |
484 | if (md->type != EFI_RUNTIME_SERVICES_CODE) | |
485 | continue; | |
486 | ||
9cd2b07c | 487 | efi_set_executable(md, true); |
a2172e25 | 488 | } |
a2172e25 | 489 | } |
a2172e25 | 490 | |
5b83683f HY |
491 | /* |
492 | * This function will switch the EFI runtime services to virtual mode. | |
493 | * Essentially, look through the EFI memmap and map every region that | |
494 | * has the runtime attribute bit set in its memory descriptor and update | |
495 | * that memory descriptor with the virtual address obtained from ioremap(). | |
496 | * This enables the runtime services to be called without having to | |
497 | * thunk back into physical mode for every invocation. | |
498 | */ | |
499 | void __init efi_enter_virtual_mode(void) | |
500 | { | |
202f9d0a | 501 | efi_memory_desc_t *md, *prev_md = NULL; |
5b83683f | 502 | efi_status_t status; |
1c083eb2 | 503 | unsigned long size; |
dd39ecf5 | 504 | u64 end, systab, addr, npages, end_pfn; |
7cb00b72 MG |
505 | void *p, *va, *new_memmap = NULL; |
506 | int count = 0; | |
5b83683f HY |
507 | |
508 | efi.systab = NULL; | |
202f9d0a MG |
509 | |
510 | /* Merge contiguous regions of the same type and attribute */ | |
511 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { | |
512 | u64 prev_size; | |
513 | md = p; | |
514 | ||
515 | if (!prev_md) { | |
516 | prev_md = md; | |
517 | continue; | |
518 | } | |
519 | ||
520 | if (prev_md->type != md->type || | |
521 | prev_md->attribute != md->attribute) { | |
522 | prev_md = md; | |
523 | continue; | |
524 | } | |
525 | ||
526 | prev_size = prev_md->num_pages << EFI_PAGE_SHIFT; | |
527 | ||
528 | if (md->phys_addr == (prev_md->phys_addr + prev_size)) { | |
529 | prev_md->num_pages += md->num_pages; | |
530 | md->type = EFI_RESERVED_TYPE; | |
531 | md->attribute = 0; | |
532 | continue; | |
533 | } | |
534 | prev_md = md; | |
535 | } | |
536 | ||
5b83683f HY |
537 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { |
538 | md = p; | |
539 | if (!(md->attribute & EFI_MEMORY_RUNTIME)) | |
540 | continue; | |
1c083eb2 HY |
541 | |
542 | size = md->num_pages << EFI_PAGE_SHIFT; | |
543 | end = md->phys_addr + size; | |
544 | ||
dd39ecf5 HY |
545 | end_pfn = PFN_UP(end); |
546 | if (end_pfn <= max_low_pfn_mapped | |
547 | || (end_pfn > (1UL << (32 - PAGE_SHIFT)) | |
548 | && end_pfn <= max_pfn_mapped)) | |
1c083eb2 | 549 | va = __va(md->phys_addr); |
5b83683f | 550 | else |
6a7bbd57 | 551 | va = efi_ioremap(md->phys_addr, size, md->type); |
1c083eb2 | 552 | |
1c083eb2 HY |
553 | md->virt_addr = (u64) (unsigned long) va; |
554 | ||
555 | if (!va) { | |
5b83683f HY |
556 | printk(KERN_ERR PFX "ioremap of 0x%llX failed!\n", |
557 | (unsigned long long)md->phys_addr); | |
1c083eb2 HY |
558 | continue; |
559 | } | |
560 | ||
4a3575fd HY |
561 | if (!(md->attribute & EFI_MEMORY_WB)) { |
562 | addr = md->virt_addr; | |
563 | npages = md->num_pages; | |
564 | memrange_efi_to_native(&addr, &npages); | |
565 | set_memory_uc(addr, npages); | |
566 | } | |
e85f2051 | 567 | |
1c083eb2 HY |
568 | systab = (u64) (unsigned long) efi_phys.systab; |
569 | if (md->phys_addr <= systab && systab < end) { | |
570 | systab += md->virt_addr - md->phys_addr; | |
571 | efi.systab = (efi_system_table_t *) (unsigned long) systab; | |
572 | } | |
7cb00b72 MG |
573 | new_memmap = krealloc(new_memmap, |
574 | (count + 1) * memmap.desc_size, | |
575 | GFP_KERNEL); | |
576 | memcpy(new_memmap + (count * memmap.desc_size), md, | |
577 | memmap.desc_size); | |
578 | count++; | |
5b83683f HY |
579 | } |
580 | ||
581 | BUG_ON(!efi.systab); | |
582 | ||
583 | status = phys_efi_set_virtual_address_map( | |
7cb00b72 | 584 | memmap.desc_size * count, |
5b83683f HY |
585 | memmap.desc_size, |
586 | memmap.desc_version, | |
7cb00b72 | 587 | (efi_memory_desc_t *)__pa(new_memmap)); |
5b83683f HY |
588 | |
589 | if (status != EFI_SUCCESS) { | |
590 | printk(KERN_ALERT "Unable to switch EFI into virtual mode " | |
591 | "(status=%lx)!\n", status); | |
592 | panic("EFI call to SetVirtualAddressMap() failed!"); | |
593 | } | |
594 | ||
595 | /* | |
596 | * Now that EFI is in virtual mode, update the function | |
597 | * pointers in the runtime service table to the new virtual addresses. | |
598 | * | |
599 | * Call EFI services through wrapper functions. | |
600 | */ | |
601 | efi.get_time = virt_efi_get_time; | |
602 | efi.set_time = virt_efi_set_time; | |
603 | efi.get_wakeup_time = virt_efi_get_wakeup_time; | |
604 | efi.set_wakeup_time = virt_efi_set_wakeup_time; | |
605 | efi.get_variable = virt_efi_get_variable; | |
606 | efi.get_next_variable = virt_efi_get_next_variable; | |
607 | efi.set_variable = virt_efi_set_variable; | |
608 | efi.get_next_high_mono_count = virt_efi_get_next_high_mono_count; | |
609 | efi.reset_system = virt_efi_reset_system; | |
2b5e8ef3 | 610 | efi.set_virtual_address_map = NULL; |
4de0d4a6 HY |
611 | if (__supported_pte_mask & _PAGE_NX) |
612 | runtime_code_page_mkexec(); | |
a3828064 HY |
613 | early_iounmap(memmap.map, memmap.nr_map * memmap.desc_size); |
614 | memmap.map = NULL; | |
7cb00b72 | 615 | kfree(new_memmap); |
5b83683f HY |
616 | } |
617 | ||
618 | /* | |
619 | * Convenience functions to obtain memory types and attributes | |
620 | */ | |
621 | u32 efi_mem_type(unsigned long phys_addr) | |
622 | { | |
623 | efi_memory_desc_t *md; | |
624 | void *p; | |
625 | ||
626 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { | |
627 | md = p; | |
628 | if ((md->phys_addr <= phys_addr) && | |
629 | (phys_addr < (md->phys_addr + | |
630 | (md->num_pages << EFI_PAGE_SHIFT)))) | |
631 | return md->type; | |
632 | } | |
633 | return 0; | |
634 | } | |
635 | ||
636 | u64 efi_mem_attributes(unsigned long phys_addr) | |
637 | { | |
638 | efi_memory_desc_t *md; | |
639 | void *p; | |
640 | ||
641 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { | |
642 | md = p; | |
643 | if ((md->phys_addr <= phys_addr) && | |
644 | (phys_addr < (md->phys_addr + | |
645 | (md->num_pages << EFI_PAGE_SHIFT)))) | |
646 | return md->attribute; | |
647 | } | |
648 | return 0; | |
649 | } |