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, | |
a604af07 | 46 | .mem_attr_table = EFI_INVALID_TABLE_ADDR, |
272686bf LL |
47 | }; |
48 | EXPORT_SYMBOL(efi); | |
a9499fa7 | 49 | |
b2e0a54a DY |
50 | static bool disable_runtime; |
51 | static int __init setup_noefi(char *arg) | |
52 | { | |
53 | disable_runtime = true; | |
54 | return 0; | |
55 | } | |
56 | early_param("noefi", setup_noefi); | |
57 | ||
58 | bool efi_runtime_disabled(void) | |
59 | { | |
60 | return disable_runtime; | |
61 | } | |
62 | ||
5ae3683c DY |
63 | static int __init parse_efi_cmdline(char *str) |
64 | { | |
9115c758 RN |
65 | if (!str) { |
66 | pr_warn("need at least one option\n"); | |
67 | return -EINVAL; | |
68 | } | |
69 | ||
12dd00e8 LL |
70 | if (parse_option_str(str, "debug")) |
71 | set_bit(EFI_DBG, &efi.flags); | |
72 | ||
5ae3683c DY |
73 | if (parse_option_str(str, "noruntime")) |
74 | disable_runtime = true; | |
75 | ||
76 | return 0; | |
77 | } | |
78 | early_param("efi", parse_efi_cmdline); | |
79 | ||
0bb54905 | 80 | struct kobject *efi_kobj; |
a9499fa7 TG |
81 | |
82 | /* | |
83 | * Let's not leave out systab information that snuck into | |
84 | * the efivars driver | |
85 | */ | |
86 | static ssize_t systab_show(struct kobject *kobj, | |
87 | struct kobj_attribute *attr, char *buf) | |
88 | { | |
89 | char *str = buf; | |
90 | ||
91 | if (!kobj || !buf) | |
92 | return -EINVAL; | |
93 | ||
94 | if (efi.mps != EFI_INVALID_TABLE_ADDR) | |
95 | str += sprintf(str, "MPS=0x%lx\n", efi.mps); | |
96 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) | |
97 | str += sprintf(str, "ACPI20=0x%lx\n", efi.acpi20); | |
98 | if (efi.acpi != EFI_INVALID_TABLE_ADDR) | |
99 | str += sprintf(str, "ACPI=0x%lx\n", efi.acpi); | |
b119fe08 JD |
100 | /* |
101 | * If both SMBIOS and SMBIOS3 entry points are implemented, the | |
102 | * SMBIOS3 entry point shall be preferred, so we list it first to | |
103 | * let applications stop parsing after the first match. | |
104 | */ | |
e1ccbbc9 AB |
105 | if (efi.smbios3 != EFI_INVALID_TABLE_ADDR) |
106 | str += sprintf(str, "SMBIOS3=0x%lx\n", efi.smbios3); | |
b119fe08 JD |
107 | if (efi.smbios != EFI_INVALID_TABLE_ADDR) |
108 | str += sprintf(str, "SMBIOS=0x%lx\n", efi.smbios); | |
a9499fa7 TG |
109 | if (efi.hcdp != EFI_INVALID_TABLE_ADDR) |
110 | str += sprintf(str, "HCDP=0x%lx\n", efi.hcdp); | |
111 | if (efi.boot_info != EFI_INVALID_TABLE_ADDR) | |
112 | str += sprintf(str, "BOOTINFO=0x%lx\n", efi.boot_info); | |
113 | if (efi.uga != EFI_INVALID_TABLE_ADDR) | |
114 | str += sprintf(str, "UGA=0x%lx\n", efi.uga); | |
115 | ||
116 | return str - buf; | |
117 | } | |
118 | ||
119 | static struct kobj_attribute efi_attr_systab = | |
120 | __ATTR(systab, 0400, systab_show, NULL); | |
121 | ||
a0998eb1 DY |
122 | #define EFI_FIELD(var) efi.var |
123 | ||
124 | #define EFI_ATTR_SHOW(name) \ | |
125 | static ssize_t name##_show(struct kobject *kobj, \ | |
126 | struct kobj_attribute *attr, char *buf) \ | |
127 | { \ | |
128 | return sprintf(buf, "0x%lx\n", EFI_FIELD(name)); \ | |
129 | } | |
130 | ||
131 | EFI_ATTR_SHOW(fw_vendor); | |
132 | EFI_ATTR_SHOW(runtime); | |
133 | EFI_ATTR_SHOW(config_table); | |
134 | ||
2859dff9 SM |
135 | static ssize_t fw_platform_size_show(struct kobject *kobj, |
136 | struct kobj_attribute *attr, char *buf) | |
137 | { | |
138 | return sprintf(buf, "%d\n", efi_enabled(EFI_64BIT) ? 64 : 32); | |
139 | } | |
140 | ||
a0998eb1 DY |
141 | static struct kobj_attribute efi_attr_fw_vendor = __ATTR_RO(fw_vendor); |
142 | static struct kobj_attribute efi_attr_runtime = __ATTR_RO(runtime); | |
143 | static struct kobj_attribute efi_attr_config_table = __ATTR_RO(config_table); | |
2859dff9 SM |
144 | static struct kobj_attribute efi_attr_fw_platform_size = |
145 | __ATTR_RO(fw_platform_size); | |
a0998eb1 | 146 | |
a9499fa7 TG |
147 | static struct attribute *efi_subsys_attrs[] = { |
148 | &efi_attr_systab.attr, | |
a0998eb1 DY |
149 | &efi_attr_fw_vendor.attr, |
150 | &efi_attr_runtime.attr, | |
151 | &efi_attr_config_table.attr, | |
2859dff9 | 152 | &efi_attr_fw_platform_size.attr, |
a0998eb1 | 153 | NULL, |
a9499fa7 TG |
154 | }; |
155 | ||
a0998eb1 DY |
156 | static umode_t efi_attr_is_visible(struct kobject *kobj, |
157 | struct attribute *attr, int n) | |
158 | { | |
9f27bc54 DK |
159 | if (attr == &efi_attr_fw_vendor.attr) { |
160 | if (efi_enabled(EFI_PARAVIRT) || | |
161 | efi.fw_vendor == EFI_INVALID_TABLE_ADDR) | |
162 | return 0; | |
163 | } else if (attr == &efi_attr_runtime.attr) { | |
164 | if (efi.runtime == EFI_INVALID_TABLE_ADDR) | |
165 | return 0; | |
166 | } else if (attr == &efi_attr_config_table.attr) { | |
167 | if (efi.config_table == EFI_INVALID_TABLE_ADDR) | |
168 | return 0; | |
169 | } | |
a0998eb1 | 170 | |
9f27bc54 | 171 | return attr->mode; |
a0998eb1 DY |
172 | } |
173 | ||
a9499fa7 TG |
174 | static struct attribute_group efi_subsys_attr_group = { |
175 | .attrs = efi_subsys_attrs, | |
a0998eb1 | 176 | .is_visible = efi_attr_is_visible, |
a9499fa7 TG |
177 | }; |
178 | ||
179 | static struct efivars generic_efivars; | |
180 | static struct efivar_operations generic_ops; | |
181 | ||
182 | static int generic_ops_register(void) | |
183 | { | |
184 | generic_ops.get_variable = efi.get_variable; | |
185 | generic_ops.set_variable = efi.set_variable; | |
9c6672ac | 186 | generic_ops.set_variable_nonblocking = efi.set_variable_nonblocking; |
a9499fa7 | 187 | generic_ops.get_next_variable = efi.get_next_variable; |
a614e192 | 188 | generic_ops.query_variable_store = efi_query_variable_store; |
a9499fa7 TG |
189 | |
190 | return efivars_register(&generic_efivars, &generic_ops, efi_kobj); | |
191 | } | |
192 | ||
193 | static void generic_ops_unregister(void) | |
194 | { | |
195 | efivars_unregister(&generic_efivars); | |
196 | } | |
197 | ||
198 | /* | |
199 | * We register the efi subsystem with the firmware subsystem and the | |
200 | * efivars subsystem with the efi subsystem, if the system was booted with | |
201 | * EFI. | |
202 | */ | |
203 | static int __init efisubsys_init(void) | |
204 | { | |
205 | int error; | |
206 | ||
207 | if (!efi_enabled(EFI_BOOT)) | |
208 | return 0; | |
209 | ||
210 | /* We register the efi directory at /sys/firmware/efi */ | |
211 | efi_kobj = kobject_create_and_add("efi", firmware_kobj); | |
212 | if (!efi_kobj) { | |
213 | pr_err("efi: Firmware registration failed.\n"); | |
214 | return -ENOMEM; | |
215 | } | |
216 | ||
217 | error = generic_ops_register(); | |
218 | if (error) | |
219 | goto err_put; | |
220 | ||
221 | error = sysfs_create_group(efi_kobj, &efi_subsys_attr_group); | |
222 | if (error) { | |
223 | pr_err("efi: Sysfs attribute export failed with error %d.\n", | |
224 | error); | |
225 | goto err_unregister; | |
226 | } | |
227 | ||
926172d4 DY |
228 | error = efi_runtime_map_init(efi_kobj); |
229 | if (error) | |
230 | goto err_remove_group; | |
231 | ||
a9499fa7 | 232 | /* and the standard mountpoint for efivarfs */ |
f9bb4882 EB |
233 | error = sysfs_create_mount_point(efi_kobj, "efivars"); |
234 | if (error) { | |
a9499fa7 | 235 | pr_err("efivars: Subsystem registration failed.\n"); |
a9499fa7 TG |
236 | goto err_remove_group; |
237 | } | |
238 | ||
239 | return 0; | |
240 | ||
241 | err_remove_group: | |
242 | sysfs_remove_group(efi_kobj, &efi_subsys_attr_group); | |
243 | err_unregister: | |
244 | generic_ops_unregister(); | |
245 | err_put: | |
246 | kobject_put(efi_kobj); | |
247 | return error; | |
248 | } | |
249 | ||
250 | subsys_initcall(efisubsys_init); | |
272686bf | 251 | |
0bb54905 PJ |
252 | /* |
253 | * Find the efi memory descriptor for a given physical address. Given a | |
254 | * physicall address, determine if it exists within an EFI Memory Map entry, | |
255 | * and if so, populate the supplied memory descriptor with the appropriate | |
256 | * data. | |
257 | */ | |
258 | int __init efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md) | |
259 | { | |
884f4f66 | 260 | struct efi_memory_map *map = &efi.memmap; |
44511fb9 | 261 | phys_addr_t p, e; |
0bb54905 PJ |
262 | |
263 | if (!efi_enabled(EFI_MEMMAP)) { | |
264 | pr_err_once("EFI_MEMMAP is not enabled.\n"); | |
265 | return -EINVAL; | |
266 | } | |
267 | ||
268 | if (!map) { | |
269 | pr_err_once("efi.memmap is not set.\n"); | |
270 | return -EINVAL; | |
271 | } | |
272 | if (!out_md) { | |
273 | pr_err_once("out_md is null.\n"); | |
274 | return -EINVAL; | |
275 | } | |
276 | if (WARN_ON_ONCE(!map->phys_map)) | |
277 | return -EINVAL; | |
278 | if (WARN_ON_ONCE(map->nr_map == 0) || WARN_ON_ONCE(map->desc_size == 0)) | |
279 | return -EINVAL; | |
280 | ||
281 | e = map->phys_map + map->nr_map * map->desc_size; | |
282 | for (p = map->phys_map; p < e; p += map->desc_size) { | |
283 | efi_memory_desc_t *md; | |
284 | u64 size; | |
285 | u64 end; | |
286 | ||
287 | /* | |
288 | * If a driver calls this after efi_free_boot_services, | |
289 | * ->map will be NULL, and the target may also not be mapped. | |
290 | * So just always get our own virtual map on the CPU. | |
291 | * | |
292 | */ | |
44511fb9 | 293 | md = early_memremap(p, sizeof (*md)); |
0bb54905 | 294 | if (!md) { |
44511fb9 AB |
295 | pr_err_once("early_memremap(%pa, %zu) failed.\n", |
296 | &p, sizeof (*md)); | |
0bb54905 PJ |
297 | return -ENOMEM; |
298 | } | |
299 | ||
300 | if (!(md->attribute & EFI_MEMORY_RUNTIME) && | |
301 | md->type != EFI_BOOT_SERVICES_DATA && | |
302 | md->type != EFI_RUNTIME_SERVICES_DATA) { | |
303 | early_memunmap(md, sizeof (*md)); | |
304 | continue; | |
305 | } | |
306 | ||
307 | size = md->num_pages << EFI_PAGE_SHIFT; | |
308 | end = md->phys_addr + size; | |
309 | if (phys_addr >= md->phys_addr && phys_addr < end) { | |
310 | memcpy(out_md, md, sizeof(*out_md)); | |
311 | early_memunmap(md, sizeof (*md)); | |
312 | return 0; | |
313 | } | |
314 | ||
315 | early_memunmap(md, sizeof (*md)); | |
316 | } | |
317 | pr_err_once("requested map not found.\n"); | |
318 | return -ENOENT; | |
319 | } | |
320 | ||
321 | /* | |
322 | * Calculate the highest address of an efi memory descriptor. | |
323 | */ | |
324 | u64 __init efi_mem_desc_end(efi_memory_desc_t *md) | |
325 | { | |
326 | u64 size = md->num_pages << EFI_PAGE_SHIFT; | |
327 | u64 end = md->phys_addr + size; | |
328 | return end; | |
329 | } | |
272686bf LL |
330 | |
331 | static __initdata efi_config_table_type_t common_tables[] = { | |
332 | {ACPI_20_TABLE_GUID, "ACPI 2.0", &efi.acpi20}, | |
333 | {ACPI_TABLE_GUID, "ACPI", &efi.acpi}, | |
334 | {HCDP_TABLE_GUID, "HCDP", &efi.hcdp}, | |
335 | {MPS_TABLE_GUID, "MPS", &efi.mps}, | |
336 | {SAL_SYSTEM_TABLE_GUID, "SALsystab", &efi.sal_systab}, | |
337 | {SMBIOS_TABLE_GUID, "SMBIOS", &efi.smbios}, | |
e1ccbbc9 | 338 | {SMBIOS3_TABLE_GUID, "SMBIOS 3.0", &efi.smbios3}, |
272686bf | 339 | {UGA_IO_PROTOCOL_GUID, "UGA", &efi.uga}, |
0bb54905 | 340 | {EFI_SYSTEM_RESOURCE_TABLE_GUID, "ESRT", &efi.esrt}, |
bf924863 | 341 | {EFI_PROPERTIES_TABLE_GUID, "PROP", &efi.properties_table}, |
a604af07 | 342 | {EFI_MEMORY_ATTRIBUTES_TABLE_GUID, "MEMATTR", &efi.mem_attr_table}, |
69e60841 | 343 | {NULL_GUID, NULL, NULL}, |
272686bf LL |
344 | }; |
345 | ||
346 | static __init int match_config_table(efi_guid_t *guid, | |
347 | unsigned long table, | |
348 | efi_config_table_type_t *table_types) | |
349 | { | |
272686bf LL |
350 | int i; |
351 | ||
352 | if (table_types) { | |
272686bf | 353 | for (i = 0; efi_guidcmp(table_types[i].guid, NULL_GUID); i++) { |
272686bf LL |
354 | if (!efi_guidcmp(*guid, table_types[i].guid)) { |
355 | *(table_types[i].ptr) = table; | |
801820be AB |
356 | if (table_types[i].name) |
357 | pr_cont(" %s=0x%lx ", | |
358 | table_types[i].name, table); | |
272686bf LL |
359 | return 1; |
360 | } | |
361 | } | |
362 | } | |
363 | ||
364 | return 0; | |
365 | } | |
366 | ||
7bb68410 AB |
367 | int __init efi_config_parse_tables(void *config_tables, int count, int sz, |
368 | efi_config_table_type_t *arch_tables) | |
272686bf | 369 | { |
7bb68410 AB |
370 | void *tablep; |
371 | int i; | |
272686bf LL |
372 | |
373 | tablep = config_tables; | |
374 | pr_info(""); | |
7bb68410 | 375 | for (i = 0; i < count; i++) { |
272686bf LL |
376 | efi_guid_t guid; |
377 | unsigned long table; | |
378 | ||
379 | if (efi_enabled(EFI_64BIT)) { | |
380 | u64 table64; | |
381 | guid = ((efi_config_table_64_t *)tablep)->guid; | |
382 | table64 = ((efi_config_table_64_t *)tablep)->table; | |
383 | table = table64; | |
384 | #ifndef CONFIG_64BIT | |
385 | if (table64 >> 32) { | |
386 | pr_cont("\n"); | |
387 | pr_err("Table located above 4GB, disabling EFI.\n"); | |
272686bf LL |
388 | return -EINVAL; |
389 | } | |
390 | #endif | |
391 | } else { | |
392 | guid = ((efi_config_table_32_t *)tablep)->guid; | |
393 | table = ((efi_config_table_32_t *)tablep)->table; | |
394 | } | |
395 | ||
396 | if (!match_config_table(&guid, table, common_tables)) | |
397 | match_config_table(&guid, table, arch_tables); | |
398 | ||
399 | tablep += sz; | |
400 | } | |
401 | pr_cont("\n"); | |
0f8093a9 | 402 | set_bit(EFI_CONFIG_TABLES, &efi.flags); |
a1041713 AB |
403 | |
404 | /* Parse the EFI Properties table if it exists */ | |
405 | if (efi.properties_table != EFI_INVALID_TABLE_ADDR) { | |
406 | efi_properties_table_t *tbl; | |
407 | ||
408 | tbl = early_memremap(efi.properties_table, sizeof(*tbl)); | |
409 | if (tbl == NULL) { | |
410 | pr_err("Could not map Properties table!\n"); | |
411 | return -ENOMEM; | |
412 | } | |
413 | ||
414 | if (tbl->memory_protection_attribute & | |
415 | EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA) | |
416 | set_bit(EFI_NX_PE_DATA, &efi.flags); | |
417 | ||
418 | early_memunmap(tbl, sizeof(*tbl)); | |
419 | } | |
420 | ||
272686bf LL |
421 | return 0; |
422 | } | |
0302f71c | 423 | |
7bb68410 AB |
424 | int __init efi_config_init(efi_config_table_type_t *arch_tables) |
425 | { | |
426 | void *config_tables; | |
427 | int sz, ret; | |
428 | ||
429 | if (efi_enabled(EFI_64BIT)) | |
430 | sz = sizeof(efi_config_table_64_t); | |
431 | else | |
432 | sz = sizeof(efi_config_table_32_t); | |
433 | ||
434 | /* | |
435 | * Let's see what config tables the firmware passed to us. | |
436 | */ | |
437 | config_tables = early_memremap(efi.systab->tables, | |
438 | efi.systab->nr_tables * sz); | |
439 | if (config_tables == NULL) { | |
440 | pr_err("Could not map Configuration table!\n"); | |
441 | return -ENOMEM; | |
442 | } | |
443 | ||
444 | ret = efi_config_parse_tables(config_tables, efi.systab->nr_tables, sz, | |
445 | arch_tables); | |
446 | ||
447 | early_memunmap(config_tables, efi.systab->nr_tables * sz); | |
448 | return ret; | |
449 | } | |
450 | ||
28d54022 LCY |
451 | #ifdef CONFIG_EFI_VARS_MODULE |
452 | static int __init efi_load_efivars(void) | |
453 | { | |
454 | struct platform_device *pdev; | |
455 | ||
456 | if (!efi_enabled(EFI_RUNTIME_SERVICES)) | |
457 | return 0; | |
458 | ||
459 | pdev = platform_device_register_simple("efivars", 0, NULL, 0); | |
460 | return IS_ERR(pdev) ? PTR_ERR(pdev) : 0; | |
461 | } | |
462 | device_initcall(efi_load_efivars); | |
463 | #endif | |
464 | ||
0302f71c MS |
465 | #ifdef CONFIG_EFI_PARAMS_FROM_FDT |
466 | ||
467 | #define UEFI_PARAM(name, prop, field) \ | |
468 | { \ | |
469 | { name }, \ | |
470 | { prop }, \ | |
471 | offsetof(struct efi_fdt_params, field), \ | |
472 | FIELD_SIZEOF(struct efi_fdt_params, field) \ | |
473 | } | |
474 | ||
475 | static __initdata struct { | |
476 | const char name[32]; | |
477 | const char propname[32]; | |
478 | int offset; | |
479 | int size; | |
480 | } dt_params[] = { | |
481 | UEFI_PARAM("System Table", "linux,uefi-system-table", system_table), | |
482 | UEFI_PARAM("MemMap Address", "linux,uefi-mmap-start", mmap), | |
483 | UEFI_PARAM("MemMap Size", "linux,uefi-mmap-size", mmap_size), | |
484 | UEFI_PARAM("MemMap Desc. Size", "linux,uefi-mmap-desc-size", desc_size), | |
485 | UEFI_PARAM("MemMap Desc. Version", "linux,uefi-mmap-desc-ver", desc_ver) | |
486 | }; | |
487 | ||
488 | struct param_info { | |
29e2435f | 489 | int found; |
0302f71c MS |
490 | void *params; |
491 | }; | |
492 | ||
493 | static int __init fdt_find_uefi_params(unsigned long node, const char *uname, | |
494 | int depth, void *data) | |
495 | { | |
496 | struct param_info *info = data; | |
6fb8cc82 CM |
497 | const void *prop; |
498 | void *dest; | |
0302f71c | 499 | u64 val; |
6fb8cc82 | 500 | int i, len; |
0302f71c | 501 | |
11629305 | 502 | if (depth != 1 || strcmp(uname, "chosen") != 0) |
0302f71c MS |
503 | return 0; |
504 | ||
0302f71c MS |
505 | for (i = 0; i < ARRAY_SIZE(dt_params); i++) { |
506 | prop = of_get_flat_dt_prop(node, dt_params[i].propname, &len); | |
29e2435f | 507 | if (!prop) |
0302f71c | 508 | return 0; |
0302f71c | 509 | dest = info->params + dt_params[i].offset; |
29e2435f | 510 | info->found++; |
0302f71c MS |
511 | |
512 | val = of_read_number(prop, len / sizeof(u32)); | |
513 | ||
514 | if (dt_params[i].size == sizeof(u32)) | |
515 | *(u32 *)dest = val; | |
516 | else | |
517 | *(u64 *)dest = val; | |
518 | ||
7968c0e3 | 519 | if (efi_enabled(EFI_DBG)) |
0302f71c MS |
520 | pr_info(" %s: 0x%0*llx\n", dt_params[i].name, |
521 | dt_params[i].size * 2, val); | |
522 | } | |
523 | return 1; | |
524 | } | |
525 | ||
7968c0e3 | 526 | int __init efi_get_fdt_params(struct efi_fdt_params *params) |
0302f71c MS |
527 | { |
528 | struct param_info info; | |
29e2435f CM |
529 | int ret; |
530 | ||
531 | pr_info("Getting EFI parameters from FDT:\n"); | |
0302f71c | 532 | |
29e2435f | 533 | info.found = 0; |
0302f71c MS |
534 | info.params = params; |
535 | ||
29e2435f CM |
536 | ret = of_scan_flat_dt(fdt_find_uefi_params, &info); |
537 | if (!info.found) | |
538 | pr_info("UEFI not found.\n"); | |
539 | else if (!ret) | |
540 | pr_err("Can't find '%s' in device tree!\n", | |
541 | dt_params[info.found].name); | |
542 | ||
543 | return ret; | |
0302f71c MS |
544 | } |
545 | #endif /* CONFIG_EFI_PARAMS_FROM_FDT */ | |
98d2a6ca LE |
546 | |
547 | static __initdata char memory_type_name[][20] = { | |
548 | "Reserved", | |
549 | "Loader Code", | |
550 | "Loader Data", | |
551 | "Boot Code", | |
552 | "Boot Data", | |
553 | "Runtime Code", | |
554 | "Runtime Data", | |
555 | "Conventional Memory", | |
556 | "Unusable Memory", | |
557 | "ACPI Reclaim Memory", | |
558 | "ACPI Memory NVS", | |
559 | "Memory Mapped I/O", | |
560 | "MMIO Port Space", | |
35575e0e RE |
561 | "PAL Code", |
562 | "Persistent Memory", | |
98d2a6ca LE |
563 | }; |
564 | ||
565 | char * __init efi_md_typeattr_format(char *buf, size_t size, | |
566 | const efi_memory_desc_t *md) | |
567 | { | |
568 | char *pos; | |
569 | int type_len; | |
570 | u64 attr; | |
571 | ||
572 | pos = buf; | |
573 | if (md->type >= ARRAY_SIZE(memory_type_name)) | |
574 | type_len = snprintf(pos, size, "[type=%u", md->type); | |
575 | else | |
576 | type_len = snprintf(pos, size, "[%-*s", | |
577 | (int)(sizeof(memory_type_name[0]) - 1), | |
578 | memory_type_name[md->type]); | |
579 | if (type_len >= size) | |
580 | return buf; | |
581 | ||
582 | pos += type_len; | |
583 | size -= type_len; | |
584 | ||
585 | attr = md->attribute; | |
586 | if (attr & ~(EFI_MEMORY_UC | EFI_MEMORY_WC | EFI_MEMORY_WT | | |
87db73ae AB |
587 | EFI_MEMORY_WB | EFI_MEMORY_UCE | EFI_MEMORY_RO | |
588 | EFI_MEMORY_WP | EFI_MEMORY_RP | EFI_MEMORY_XP | | |
c016ca08 | 589 | EFI_MEMORY_NV | |
8be4432e | 590 | EFI_MEMORY_RUNTIME | EFI_MEMORY_MORE_RELIABLE)) |
98d2a6ca LE |
591 | snprintf(pos, size, "|attr=0x%016llx]", |
592 | (unsigned long long)attr); | |
593 | else | |
c016ca08 RE |
594 | snprintf(pos, size, |
595 | "|%3s|%2s|%2s|%2s|%2s|%2s|%2s|%3s|%2s|%2s|%2s|%2s]", | |
98d2a6ca | 596 | attr & EFI_MEMORY_RUNTIME ? "RUN" : "", |
8be4432e | 597 | attr & EFI_MEMORY_MORE_RELIABLE ? "MR" : "", |
c016ca08 | 598 | attr & EFI_MEMORY_NV ? "NV" : "", |
98d2a6ca LE |
599 | attr & EFI_MEMORY_XP ? "XP" : "", |
600 | attr & EFI_MEMORY_RP ? "RP" : "", | |
601 | attr & EFI_MEMORY_WP ? "WP" : "", | |
87db73ae | 602 | attr & EFI_MEMORY_RO ? "RO" : "", |
98d2a6ca LE |
603 | attr & EFI_MEMORY_UCE ? "UCE" : "", |
604 | attr & EFI_MEMORY_WB ? "WB" : "", | |
605 | attr & EFI_MEMORY_WT ? "WT" : "", | |
606 | attr & EFI_MEMORY_WC ? "WC" : "", | |
607 | attr & EFI_MEMORY_UC ? "UC" : ""); | |
608 | return buf; | |
609 | } | |
7bf79311 JZZ |
610 | |
611 | /* | |
612 | * efi_mem_attributes - lookup memmap attributes for physical address | |
613 | * @phys_addr: the physical address to lookup | |
614 | * | |
615 | * Search in the EFI memory map for the region covering | |
616 | * @phys_addr. Returns the EFI memory attributes if the region | |
617 | * was found in the memory map, 0 otherwise. | |
618 | * | |
619 | * Despite being marked __weak, most architectures should *not* | |
620 | * override this function. It is __weak solely for the benefit | |
621 | * of ia64 which has a funky EFI memory map that doesn't work | |
622 | * the same way as other architectures. | |
623 | */ | |
624 | u64 __weak efi_mem_attributes(unsigned long phys_addr) | |
625 | { | |
626 | efi_memory_desc_t *md; | |
7bf79311 JZZ |
627 | |
628 | if (!efi_enabled(EFI_MEMMAP)) | |
629 | return 0; | |
630 | ||
78ce248f | 631 | for_each_efi_memory_desc(md) { |
7bf79311 JZZ |
632 | if ((md->phys_addr <= phys_addr) && |
633 | (phys_addr < (md->phys_addr + | |
634 | (md->num_pages << EFI_PAGE_SHIFT)))) | |
635 | return md->attribute; | |
636 | } | |
637 | return 0; | |
638 | } | |
806b0351 MF |
639 | |
640 | int efi_status_to_err(efi_status_t status) | |
641 | { | |
642 | int err; | |
643 | ||
644 | switch (status) { | |
645 | case EFI_SUCCESS: | |
646 | err = 0; | |
647 | break; | |
648 | case EFI_INVALID_PARAMETER: | |
649 | err = -EINVAL; | |
650 | break; | |
651 | case EFI_OUT_OF_RESOURCES: | |
652 | err = -ENOSPC; | |
653 | break; | |
654 | case EFI_DEVICE_ERROR: | |
655 | err = -EIO; | |
656 | break; | |
657 | case EFI_WRITE_PROTECTED: | |
658 | err = -EROFS; | |
659 | break; | |
660 | case EFI_SECURITY_VIOLATION: | |
661 | err = -EACCES; | |
662 | break; | |
663 | case EFI_NOT_FOUND: | |
664 | err = -ENOENT; | |
665 | break; | |
666 | default: | |
667 | err = -EINVAL; | |
668 | } | |
669 | ||
670 | return err; | |
671 | } |