Commit | Line | Data |
---|---|---|
a9499fa7 TG |
1 | /* |
2 | * efi.c - EFI subsystem | |
3 | * | |
4 | * Copyright (C) 2001,2003,2004 Dell <Matt_Domsch@dell.com> | |
5 | * Copyright (C) 2004 Intel Corporation <matthew.e.tolentino@intel.com> | |
6 | * Copyright (C) 2013 Tom Gundersen <teg@jklm.no> | |
7 | * | |
8 | * This code registers /sys/firmware/efi{,/efivars} when EFI is supported, | |
9 | * allowing the efivarfs to be mounted or the efivars module to be loaded. | |
10 | * The existance of /sys/firmware/efi may also be used by userspace to | |
11 | * determine that the system supports EFI. | |
12 | * | |
13 | * This file is released under the GPLv2. | |
14 | */ | |
15 | ||
272686bf LL |
16 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
17 | ||
a9499fa7 TG |
18 | #include <linux/kobject.h> |
19 | #include <linux/module.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/device.h> | |
22 | #include <linux/efi.h> | |
0302f71c MS |
23 | #include <linux/of.h> |
24 | #include <linux/of_fdt.h> | |
272686bf | 25 | #include <linux/io.h> |
28d54022 | 26 | #include <linux/platform_device.h> |
272686bf | 27 | |
0f7f2f0c | 28 | #include <asm/early_ioremap.h> |
f7d92489 | 29 | |
272686bf | 30 | struct efi __read_mostly efi = { |
bf924863 AB |
31 | .mps = EFI_INVALID_TABLE_ADDR, |
32 | .acpi = EFI_INVALID_TABLE_ADDR, | |
33 | .acpi20 = EFI_INVALID_TABLE_ADDR, | |
34 | .smbios = EFI_INVALID_TABLE_ADDR, | |
35 | .smbios3 = EFI_INVALID_TABLE_ADDR, | |
36 | .sal_systab = EFI_INVALID_TABLE_ADDR, | |
37 | .boot_info = EFI_INVALID_TABLE_ADDR, | |
38 | .hcdp = EFI_INVALID_TABLE_ADDR, | |
39 | .uga = EFI_INVALID_TABLE_ADDR, | |
40 | .uv_systab = EFI_INVALID_TABLE_ADDR, | |
41 | .fw_vendor = EFI_INVALID_TABLE_ADDR, | |
42 | .runtime = EFI_INVALID_TABLE_ADDR, | |
43 | .config_table = EFI_INVALID_TABLE_ADDR, | |
44 | .esrt = EFI_INVALID_TABLE_ADDR, | |
45 | .properties_table = EFI_INVALID_TABLE_ADDR, | |
272686bf LL |
46 | }; |
47 | EXPORT_SYMBOL(efi); | |
a9499fa7 | 48 | |
b2e0a54a DY |
49 | static bool disable_runtime; |
50 | static int __init setup_noefi(char *arg) | |
51 | { | |
52 | disable_runtime = true; | |
53 | return 0; | |
54 | } | |
55 | early_param("noefi", setup_noefi); | |
56 | ||
57 | bool efi_runtime_disabled(void) | |
58 | { | |
59 | return disable_runtime; | |
60 | } | |
61 | ||
5ae3683c DY |
62 | static int __init parse_efi_cmdline(char *str) |
63 | { | |
9115c758 RN |
64 | if (!str) { |
65 | pr_warn("need at least one option\n"); | |
66 | return -EINVAL; | |
67 | } | |
68 | ||
12dd00e8 LL |
69 | if (parse_option_str(str, "debug")) |
70 | set_bit(EFI_DBG, &efi.flags); | |
71 | ||
5ae3683c DY |
72 | if (parse_option_str(str, "noruntime")) |
73 | disable_runtime = true; | |
74 | ||
75 | return 0; | |
76 | } | |
77 | early_param("efi", parse_efi_cmdline); | |
78 | ||
0bb54905 | 79 | struct kobject *efi_kobj; |
a9499fa7 TG |
80 | |
81 | /* | |
82 | * Let's not leave out systab information that snuck into | |
83 | * the efivars driver | |
84 | */ | |
85 | static ssize_t systab_show(struct kobject *kobj, | |
86 | struct kobj_attribute *attr, char *buf) | |
87 | { | |
88 | char *str = buf; | |
89 | ||
90 | if (!kobj || !buf) | |
91 | return -EINVAL; | |
92 | ||
93 | if (efi.mps != EFI_INVALID_TABLE_ADDR) | |
94 | str += sprintf(str, "MPS=0x%lx\n", efi.mps); | |
95 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) | |
96 | str += sprintf(str, "ACPI20=0x%lx\n", efi.acpi20); | |
97 | if (efi.acpi != EFI_INVALID_TABLE_ADDR) | |
98 | str += sprintf(str, "ACPI=0x%lx\n", efi.acpi); | |
b119fe08 JD |
99 | /* |
100 | * If both SMBIOS and SMBIOS3 entry points are implemented, the | |
101 | * SMBIOS3 entry point shall be preferred, so we list it first to | |
102 | * let applications stop parsing after the first match. | |
103 | */ | |
e1ccbbc9 AB |
104 | if (efi.smbios3 != EFI_INVALID_TABLE_ADDR) |
105 | str += sprintf(str, "SMBIOS3=0x%lx\n", efi.smbios3); | |
b119fe08 JD |
106 | if (efi.smbios != EFI_INVALID_TABLE_ADDR) |
107 | str += sprintf(str, "SMBIOS=0x%lx\n", efi.smbios); | |
a9499fa7 TG |
108 | if (efi.hcdp != EFI_INVALID_TABLE_ADDR) |
109 | str += sprintf(str, "HCDP=0x%lx\n", efi.hcdp); | |
110 | if (efi.boot_info != EFI_INVALID_TABLE_ADDR) | |
111 | str += sprintf(str, "BOOTINFO=0x%lx\n", efi.boot_info); | |
112 | if (efi.uga != EFI_INVALID_TABLE_ADDR) | |
113 | str += sprintf(str, "UGA=0x%lx\n", efi.uga); | |
114 | ||
115 | return str - buf; | |
116 | } | |
117 | ||
118 | static struct kobj_attribute efi_attr_systab = | |
119 | __ATTR(systab, 0400, systab_show, NULL); | |
120 | ||
a0998eb1 DY |
121 | #define EFI_FIELD(var) efi.var |
122 | ||
123 | #define EFI_ATTR_SHOW(name) \ | |
124 | static ssize_t name##_show(struct kobject *kobj, \ | |
125 | struct kobj_attribute *attr, char *buf) \ | |
126 | { \ | |
127 | return sprintf(buf, "0x%lx\n", EFI_FIELD(name)); \ | |
128 | } | |
129 | ||
130 | EFI_ATTR_SHOW(fw_vendor); | |
131 | EFI_ATTR_SHOW(runtime); | |
132 | EFI_ATTR_SHOW(config_table); | |
133 | ||
2859dff9 SM |
134 | static ssize_t fw_platform_size_show(struct kobject *kobj, |
135 | struct kobj_attribute *attr, char *buf) | |
136 | { | |
137 | return sprintf(buf, "%d\n", efi_enabled(EFI_64BIT) ? 64 : 32); | |
138 | } | |
139 | ||
a0998eb1 DY |
140 | static struct kobj_attribute efi_attr_fw_vendor = __ATTR_RO(fw_vendor); |
141 | static struct kobj_attribute efi_attr_runtime = __ATTR_RO(runtime); | |
142 | static struct kobj_attribute efi_attr_config_table = __ATTR_RO(config_table); | |
2859dff9 SM |
143 | static struct kobj_attribute efi_attr_fw_platform_size = |
144 | __ATTR_RO(fw_platform_size); | |
a0998eb1 | 145 | |
a9499fa7 TG |
146 | static struct attribute *efi_subsys_attrs[] = { |
147 | &efi_attr_systab.attr, | |
a0998eb1 DY |
148 | &efi_attr_fw_vendor.attr, |
149 | &efi_attr_runtime.attr, | |
150 | &efi_attr_config_table.attr, | |
2859dff9 | 151 | &efi_attr_fw_platform_size.attr, |
a0998eb1 | 152 | NULL, |
a9499fa7 TG |
153 | }; |
154 | ||
a0998eb1 DY |
155 | static umode_t efi_attr_is_visible(struct kobject *kobj, |
156 | struct attribute *attr, int n) | |
157 | { | |
9f27bc54 DK |
158 | if (attr == &efi_attr_fw_vendor.attr) { |
159 | if (efi_enabled(EFI_PARAVIRT) || | |
160 | efi.fw_vendor == EFI_INVALID_TABLE_ADDR) | |
161 | return 0; | |
162 | } else if (attr == &efi_attr_runtime.attr) { | |
163 | if (efi.runtime == EFI_INVALID_TABLE_ADDR) | |
164 | return 0; | |
165 | } else if (attr == &efi_attr_config_table.attr) { | |
166 | if (efi.config_table == EFI_INVALID_TABLE_ADDR) | |
167 | return 0; | |
168 | } | |
a0998eb1 | 169 | |
9f27bc54 | 170 | return attr->mode; |
a0998eb1 DY |
171 | } |
172 | ||
a9499fa7 TG |
173 | static struct attribute_group efi_subsys_attr_group = { |
174 | .attrs = efi_subsys_attrs, | |
a0998eb1 | 175 | .is_visible = efi_attr_is_visible, |
a9499fa7 TG |
176 | }; |
177 | ||
178 | static struct efivars generic_efivars; | |
179 | static struct efivar_operations generic_ops; | |
180 | ||
181 | static int generic_ops_register(void) | |
182 | { | |
183 | generic_ops.get_variable = efi.get_variable; | |
184 | generic_ops.set_variable = efi.set_variable; | |
9c6672ac | 185 | generic_ops.set_variable_nonblocking = efi.set_variable_nonblocking; |
a9499fa7 | 186 | generic_ops.get_next_variable = efi.get_next_variable; |
a614e192 | 187 | generic_ops.query_variable_store = efi_query_variable_store; |
a9499fa7 TG |
188 | |
189 | return efivars_register(&generic_efivars, &generic_ops, efi_kobj); | |
190 | } | |
191 | ||
192 | static void generic_ops_unregister(void) | |
193 | { | |
194 | efivars_unregister(&generic_efivars); | |
195 | } | |
196 | ||
197 | /* | |
198 | * We register the efi subsystem with the firmware subsystem and the | |
199 | * efivars subsystem with the efi subsystem, if the system was booted with | |
200 | * EFI. | |
201 | */ | |
202 | static int __init efisubsys_init(void) | |
203 | { | |
204 | int error; | |
205 | ||
206 | if (!efi_enabled(EFI_BOOT)) | |
207 | return 0; | |
208 | ||
209 | /* We register the efi directory at /sys/firmware/efi */ | |
210 | efi_kobj = kobject_create_and_add("efi", firmware_kobj); | |
211 | if (!efi_kobj) { | |
212 | pr_err("efi: Firmware registration failed.\n"); | |
213 | return -ENOMEM; | |
214 | } | |
215 | ||
216 | error = generic_ops_register(); | |
217 | if (error) | |
218 | goto err_put; | |
219 | ||
220 | error = sysfs_create_group(efi_kobj, &efi_subsys_attr_group); | |
221 | if (error) { | |
222 | pr_err("efi: Sysfs attribute export failed with error %d.\n", | |
223 | error); | |
224 | goto err_unregister; | |
225 | } | |
226 | ||
926172d4 DY |
227 | error = efi_runtime_map_init(efi_kobj); |
228 | if (error) | |
229 | goto err_remove_group; | |
230 | ||
a9499fa7 | 231 | /* and the standard mountpoint for efivarfs */ |
f9bb4882 EB |
232 | error = sysfs_create_mount_point(efi_kobj, "efivars"); |
233 | if (error) { | |
a9499fa7 | 234 | pr_err("efivars: Subsystem registration failed.\n"); |
a9499fa7 TG |
235 | goto err_remove_group; |
236 | } | |
237 | ||
238 | return 0; | |
239 | ||
240 | err_remove_group: | |
241 | sysfs_remove_group(efi_kobj, &efi_subsys_attr_group); | |
242 | err_unregister: | |
243 | generic_ops_unregister(); | |
244 | err_put: | |
245 | kobject_put(efi_kobj); | |
246 | return error; | |
247 | } | |
248 | ||
249 | subsys_initcall(efisubsys_init); | |
272686bf | 250 | |
0bb54905 PJ |
251 | /* |
252 | * Find the efi memory descriptor for a given physical address. Given a | |
253 | * physicall address, determine if it exists within an EFI Memory Map entry, | |
254 | * and if so, populate the supplied memory descriptor with the appropriate | |
255 | * data. | |
256 | */ | |
257 | int __init efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md) | |
258 | { | |
259 | struct efi_memory_map *map = efi.memmap; | |
44511fb9 | 260 | phys_addr_t p, e; |
0bb54905 PJ |
261 | |
262 | if (!efi_enabled(EFI_MEMMAP)) { | |
263 | pr_err_once("EFI_MEMMAP is not enabled.\n"); | |
264 | return -EINVAL; | |
265 | } | |
266 | ||
267 | if (!map) { | |
268 | pr_err_once("efi.memmap is not set.\n"); | |
269 | return -EINVAL; | |
270 | } | |
271 | if (!out_md) { | |
272 | pr_err_once("out_md is null.\n"); | |
273 | return -EINVAL; | |
274 | } | |
275 | if (WARN_ON_ONCE(!map->phys_map)) | |
276 | return -EINVAL; | |
277 | if (WARN_ON_ONCE(map->nr_map == 0) || WARN_ON_ONCE(map->desc_size == 0)) | |
278 | return -EINVAL; | |
279 | ||
280 | e = map->phys_map + map->nr_map * map->desc_size; | |
281 | for (p = map->phys_map; p < e; p += map->desc_size) { | |
282 | efi_memory_desc_t *md; | |
283 | u64 size; | |
284 | u64 end; | |
285 | ||
286 | /* | |
287 | * If a driver calls this after efi_free_boot_services, | |
288 | * ->map will be NULL, and the target may also not be mapped. | |
289 | * So just always get our own virtual map on the CPU. | |
290 | * | |
291 | */ | |
44511fb9 | 292 | md = early_memremap(p, sizeof (*md)); |
0bb54905 | 293 | if (!md) { |
44511fb9 AB |
294 | pr_err_once("early_memremap(%pa, %zu) failed.\n", |
295 | &p, sizeof (*md)); | |
0bb54905 PJ |
296 | return -ENOMEM; |
297 | } | |
298 | ||
299 | if (!(md->attribute & EFI_MEMORY_RUNTIME) && | |
300 | md->type != EFI_BOOT_SERVICES_DATA && | |
301 | md->type != EFI_RUNTIME_SERVICES_DATA) { | |
302 | early_memunmap(md, sizeof (*md)); | |
303 | continue; | |
304 | } | |
305 | ||
306 | size = md->num_pages << EFI_PAGE_SHIFT; | |
307 | end = md->phys_addr + size; | |
308 | if (phys_addr >= md->phys_addr && phys_addr < end) { | |
309 | memcpy(out_md, md, sizeof(*out_md)); | |
310 | early_memunmap(md, sizeof (*md)); | |
311 | return 0; | |
312 | } | |
313 | ||
314 | early_memunmap(md, sizeof (*md)); | |
315 | } | |
316 | pr_err_once("requested map not found.\n"); | |
317 | return -ENOENT; | |
318 | } | |
319 | ||
320 | /* | |
321 | * Calculate the highest address of an efi memory descriptor. | |
322 | */ | |
323 | u64 __init efi_mem_desc_end(efi_memory_desc_t *md) | |
324 | { | |
325 | u64 size = md->num_pages << EFI_PAGE_SHIFT; | |
326 | u64 end = md->phys_addr + size; | |
327 | return end; | |
328 | } | |
272686bf LL |
329 | |
330 | static __initdata efi_config_table_type_t common_tables[] = { | |
331 | {ACPI_20_TABLE_GUID, "ACPI 2.0", &efi.acpi20}, | |
332 | {ACPI_TABLE_GUID, "ACPI", &efi.acpi}, | |
333 | {HCDP_TABLE_GUID, "HCDP", &efi.hcdp}, | |
334 | {MPS_TABLE_GUID, "MPS", &efi.mps}, | |
335 | {SAL_SYSTEM_TABLE_GUID, "SALsystab", &efi.sal_systab}, | |
336 | {SMBIOS_TABLE_GUID, "SMBIOS", &efi.smbios}, | |
e1ccbbc9 | 337 | {SMBIOS3_TABLE_GUID, "SMBIOS 3.0", &efi.smbios3}, |
272686bf | 338 | {UGA_IO_PROTOCOL_GUID, "UGA", &efi.uga}, |
0bb54905 | 339 | {EFI_SYSTEM_RESOURCE_TABLE_GUID, "ESRT", &efi.esrt}, |
bf924863 | 340 | {EFI_PROPERTIES_TABLE_GUID, "PROP", &efi.properties_table}, |
69e60841 | 341 | {NULL_GUID, NULL, NULL}, |
272686bf LL |
342 | }; |
343 | ||
344 | static __init int match_config_table(efi_guid_t *guid, | |
345 | unsigned long table, | |
346 | efi_config_table_type_t *table_types) | |
347 | { | |
272686bf LL |
348 | int i; |
349 | ||
350 | if (table_types) { | |
272686bf | 351 | for (i = 0; efi_guidcmp(table_types[i].guid, NULL_GUID); i++) { |
272686bf LL |
352 | if (!efi_guidcmp(*guid, table_types[i].guid)) { |
353 | *(table_types[i].ptr) = table; | |
354 | pr_cont(" %s=0x%lx ", | |
355 | table_types[i].name, table); | |
356 | return 1; | |
357 | } | |
358 | } | |
359 | } | |
360 | ||
361 | return 0; | |
362 | } | |
363 | ||
7bb68410 AB |
364 | int __init efi_config_parse_tables(void *config_tables, int count, int sz, |
365 | efi_config_table_type_t *arch_tables) | |
272686bf | 366 | { |
7bb68410 AB |
367 | void *tablep; |
368 | int i; | |
272686bf LL |
369 | |
370 | tablep = config_tables; | |
371 | pr_info(""); | |
7bb68410 | 372 | for (i = 0; i < count; i++) { |
272686bf LL |
373 | efi_guid_t guid; |
374 | unsigned long table; | |
375 | ||
376 | if (efi_enabled(EFI_64BIT)) { | |
377 | u64 table64; | |
378 | guid = ((efi_config_table_64_t *)tablep)->guid; | |
379 | table64 = ((efi_config_table_64_t *)tablep)->table; | |
380 | table = table64; | |
381 | #ifndef CONFIG_64BIT | |
382 | if (table64 >> 32) { | |
383 | pr_cont("\n"); | |
384 | pr_err("Table located above 4GB, disabling EFI.\n"); | |
272686bf LL |
385 | return -EINVAL; |
386 | } | |
387 | #endif | |
388 | } else { | |
389 | guid = ((efi_config_table_32_t *)tablep)->guid; | |
390 | table = ((efi_config_table_32_t *)tablep)->table; | |
391 | } | |
392 | ||
393 | if (!match_config_table(&guid, table, common_tables)) | |
394 | match_config_table(&guid, table, arch_tables); | |
395 | ||
396 | tablep += sz; | |
397 | } | |
398 | pr_cont("\n"); | |
0f8093a9 | 399 | set_bit(EFI_CONFIG_TABLES, &efi.flags); |
a1041713 AB |
400 | |
401 | /* Parse the EFI Properties table if it exists */ | |
402 | if (efi.properties_table != EFI_INVALID_TABLE_ADDR) { | |
403 | efi_properties_table_t *tbl; | |
404 | ||
405 | tbl = early_memremap(efi.properties_table, sizeof(*tbl)); | |
406 | if (tbl == NULL) { | |
407 | pr_err("Could not map Properties table!\n"); | |
408 | return -ENOMEM; | |
409 | } | |
410 | ||
411 | if (tbl->memory_protection_attribute & | |
412 | EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA) | |
413 | set_bit(EFI_NX_PE_DATA, &efi.flags); | |
414 | ||
415 | early_memunmap(tbl, sizeof(*tbl)); | |
416 | } | |
417 | ||
272686bf LL |
418 | return 0; |
419 | } | |
0302f71c | 420 | |
7bb68410 AB |
421 | int __init efi_config_init(efi_config_table_type_t *arch_tables) |
422 | { | |
423 | void *config_tables; | |
424 | int sz, ret; | |
425 | ||
426 | if (efi_enabled(EFI_64BIT)) | |
427 | sz = sizeof(efi_config_table_64_t); | |
428 | else | |
429 | sz = sizeof(efi_config_table_32_t); | |
430 | ||
431 | /* | |
432 | * Let's see what config tables the firmware passed to us. | |
433 | */ | |
434 | config_tables = early_memremap(efi.systab->tables, | |
435 | efi.systab->nr_tables * sz); | |
436 | if (config_tables == NULL) { | |
437 | pr_err("Could not map Configuration table!\n"); | |
438 | return -ENOMEM; | |
439 | } | |
440 | ||
441 | ret = efi_config_parse_tables(config_tables, efi.systab->nr_tables, sz, | |
442 | arch_tables); | |
443 | ||
444 | early_memunmap(config_tables, efi.systab->nr_tables * sz); | |
445 | return ret; | |
446 | } | |
447 | ||
28d54022 LCY |
448 | #ifdef CONFIG_EFI_VARS_MODULE |
449 | static int __init efi_load_efivars(void) | |
450 | { | |
451 | struct platform_device *pdev; | |
452 | ||
453 | if (!efi_enabled(EFI_RUNTIME_SERVICES)) | |
454 | return 0; | |
455 | ||
456 | pdev = platform_device_register_simple("efivars", 0, NULL, 0); | |
457 | return IS_ERR(pdev) ? PTR_ERR(pdev) : 0; | |
458 | } | |
459 | device_initcall(efi_load_efivars); | |
460 | #endif | |
461 | ||
0302f71c MS |
462 | #ifdef CONFIG_EFI_PARAMS_FROM_FDT |
463 | ||
464 | #define UEFI_PARAM(name, prop, field) \ | |
465 | { \ | |
466 | { name }, \ | |
467 | { prop }, \ | |
468 | offsetof(struct efi_fdt_params, field), \ | |
469 | FIELD_SIZEOF(struct efi_fdt_params, field) \ | |
470 | } | |
471 | ||
472 | static __initdata struct { | |
473 | const char name[32]; | |
474 | const char propname[32]; | |
475 | int offset; | |
476 | int size; | |
477 | } dt_params[] = { | |
478 | UEFI_PARAM("System Table", "linux,uefi-system-table", system_table), | |
479 | UEFI_PARAM("MemMap Address", "linux,uefi-mmap-start", mmap), | |
480 | UEFI_PARAM("MemMap Size", "linux,uefi-mmap-size", mmap_size), | |
481 | UEFI_PARAM("MemMap Desc. Size", "linux,uefi-mmap-desc-size", desc_size), | |
482 | UEFI_PARAM("MemMap Desc. Version", "linux,uefi-mmap-desc-ver", desc_ver) | |
483 | }; | |
484 | ||
485 | struct param_info { | |
29e2435f | 486 | int found; |
0302f71c MS |
487 | void *params; |
488 | }; | |
489 | ||
490 | static int __init fdt_find_uefi_params(unsigned long node, const char *uname, | |
491 | int depth, void *data) | |
492 | { | |
493 | struct param_info *info = data; | |
6fb8cc82 CM |
494 | const void *prop; |
495 | void *dest; | |
0302f71c | 496 | u64 val; |
6fb8cc82 | 497 | int i, len; |
0302f71c | 498 | |
11629305 | 499 | if (depth != 1 || strcmp(uname, "chosen") != 0) |
0302f71c MS |
500 | return 0; |
501 | ||
0302f71c MS |
502 | for (i = 0; i < ARRAY_SIZE(dt_params); i++) { |
503 | prop = of_get_flat_dt_prop(node, dt_params[i].propname, &len); | |
29e2435f | 504 | if (!prop) |
0302f71c | 505 | return 0; |
0302f71c | 506 | dest = info->params + dt_params[i].offset; |
29e2435f | 507 | info->found++; |
0302f71c MS |
508 | |
509 | val = of_read_number(prop, len / sizeof(u32)); | |
510 | ||
511 | if (dt_params[i].size == sizeof(u32)) | |
512 | *(u32 *)dest = val; | |
513 | else | |
514 | *(u64 *)dest = val; | |
515 | ||
7968c0e3 | 516 | if (efi_enabled(EFI_DBG)) |
0302f71c MS |
517 | pr_info(" %s: 0x%0*llx\n", dt_params[i].name, |
518 | dt_params[i].size * 2, val); | |
519 | } | |
520 | return 1; | |
521 | } | |
522 | ||
7968c0e3 | 523 | int __init efi_get_fdt_params(struct efi_fdt_params *params) |
0302f71c MS |
524 | { |
525 | struct param_info info; | |
29e2435f CM |
526 | int ret; |
527 | ||
528 | pr_info("Getting EFI parameters from FDT:\n"); | |
0302f71c | 529 | |
29e2435f | 530 | info.found = 0; |
0302f71c MS |
531 | info.params = params; |
532 | ||
29e2435f CM |
533 | ret = of_scan_flat_dt(fdt_find_uefi_params, &info); |
534 | if (!info.found) | |
535 | pr_info("UEFI not found.\n"); | |
536 | else if (!ret) | |
537 | pr_err("Can't find '%s' in device tree!\n", | |
538 | dt_params[info.found].name); | |
539 | ||
540 | return ret; | |
0302f71c MS |
541 | } |
542 | #endif /* CONFIG_EFI_PARAMS_FROM_FDT */ | |
98d2a6ca LE |
543 | |
544 | static __initdata char memory_type_name[][20] = { | |
545 | "Reserved", | |
546 | "Loader Code", | |
547 | "Loader Data", | |
548 | "Boot Code", | |
549 | "Boot Data", | |
550 | "Runtime Code", | |
551 | "Runtime Data", | |
552 | "Conventional Memory", | |
553 | "Unusable Memory", | |
554 | "ACPI Reclaim Memory", | |
555 | "ACPI Memory NVS", | |
556 | "Memory Mapped I/O", | |
557 | "MMIO Port Space", | |
35575e0e RE |
558 | "PAL Code", |
559 | "Persistent Memory", | |
98d2a6ca LE |
560 | }; |
561 | ||
562 | char * __init efi_md_typeattr_format(char *buf, size_t size, | |
563 | const efi_memory_desc_t *md) | |
564 | { | |
565 | char *pos; | |
566 | int type_len; | |
567 | u64 attr; | |
568 | ||
569 | pos = buf; | |
570 | if (md->type >= ARRAY_SIZE(memory_type_name)) | |
571 | type_len = snprintf(pos, size, "[type=%u", md->type); | |
572 | else | |
573 | type_len = snprintf(pos, size, "[%-*s", | |
574 | (int)(sizeof(memory_type_name[0]) - 1), | |
575 | memory_type_name[md->type]); | |
576 | if (type_len >= size) | |
577 | return buf; | |
578 | ||
579 | pos += type_len; | |
580 | size -= type_len; | |
581 | ||
582 | attr = md->attribute; | |
583 | if (attr & ~(EFI_MEMORY_UC | EFI_MEMORY_WC | EFI_MEMORY_WT | | |
87db73ae AB |
584 | EFI_MEMORY_WB | EFI_MEMORY_UCE | EFI_MEMORY_RO | |
585 | EFI_MEMORY_WP | EFI_MEMORY_RP | EFI_MEMORY_XP | | |
c016ca08 | 586 | EFI_MEMORY_NV | |
8be4432e | 587 | EFI_MEMORY_RUNTIME | EFI_MEMORY_MORE_RELIABLE)) |
98d2a6ca LE |
588 | snprintf(pos, size, "|attr=0x%016llx]", |
589 | (unsigned long long)attr); | |
590 | else | |
c016ca08 RE |
591 | snprintf(pos, size, |
592 | "|%3s|%2s|%2s|%2s|%2s|%2s|%2s|%3s|%2s|%2s|%2s|%2s]", | |
98d2a6ca | 593 | attr & EFI_MEMORY_RUNTIME ? "RUN" : "", |
8be4432e | 594 | attr & EFI_MEMORY_MORE_RELIABLE ? "MR" : "", |
c016ca08 | 595 | attr & EFI_MEMORY_NV ? "NV" : "", |
98d2a6ca LE |
596 | attr & EFI_MEMORY_XP ? "XP" : "", |
597 | attr & EFI_MEMORY_RP ? "RP" : "", | |
598 | attr & EFI_MEMORY_WP ? "WP" : "", | |
87db73ae | 599 | attr & EFI_MEMORY_RO ? "RO" : "", |
98d2a6ca LE |
600 | attr & EFI_MEMORY_UCE ? "UCE" : "", |
601 | attr & EFI_MEMORY_WB ? "WB" : "", | |
602 | attr & EFI_MEMORY_WT ? "WT" : "", | |
603 | attr & EFI_MEMORY_WC ? "WC" : "", | |
604 | attr & EFI_MEMORY_UC ? "UC" : ""); | |
605 | return buf; | |
606 | } | |
7bf79311 JZZ |
607 | |
608 | /* | |
609 | * efi_mem_attributes - lookup memmap attributes for physical address | |
610 | * @phys_addr: the physical address to lookup | |
611 | * | |
612 | * Search in the EFI memory map for the region covering | |
613 | * @phys_addr. Returns the EFI memory attributes if the region | |
614 | * was found in the memory map, 0 otherwise. | |
615 | * | |
616 | * Despite being marked __weak, most architectures should *not* | |
617 | * override this function. It is __weak solely for the benefit | |
618 | * of ia64 which has a funky EFI memory map that doesn't work | |
619 | * the same way as other architectures. | |
620 | */ | |
621 | u64 __weak efi_mem_attributes(unsigned long phys_addr) | |
622 | { | |
0ce423b6 | 623 | struct efi_memory_map *map; |
7bf79311 JZZ |
624 | efi_memory_desc_t *md; |
625 | void *p; | |
626 | ||
627 | if (!efi_enabled(EFI_MEMMAP)) | |
628 | return 0; | |
629 | ||
0ce423b6 MF |
630 | map = efi.memmap; |
631 | for (p = map->map; p < map->map_end; p += map->desc_size) { | |
7bf79311 JZZ |
632 | md = p; |
633 | if ((md->phys_addr <= phys_addr) && | |
634 | (phys_addr < (md->phys_addr + | |
635 | (md->num_pages << EFI_PAGE_SHIFT)))) | |
636 | return md->attribute; | |
637 | } | |
638 | return 0; | |
639 | } |