]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Extensible Firmware Interface | |
3 | * | |
4 | * Based on Extensible Firmware Interface Specification version 1.0 | |
5 | * | |
6 | * Copyright (C) 1999 VA Linux Systems | |
7 | * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> | |
8 | * Copyright (C) 1999-2002 Hewlett-Packard Co. | |
9 | * David Mosberger-Tang <davidm@hpl.hp.com> | |
10 | * Stephane Eranian <eranian@hpl.hp.com> | |
11 | * | |
12 | * All EFI Runtime Services are not implemented yet as EFI only | |
13 | * supports physical mode addressing on SoftSDV. This is to be fixed | |
14 | * in a future version. --drummond 1999-07-20 | |
15 | * | |
16 | * Implemented EFI runtime services and virtual mode calls. --davidm | |
17 | * | |
18 | * Goutham Rao: <goutham.rao@intel.com> | |
19 | * Skip non-WB memory and ignore empty memory ranges. | |
20 | */ | |
21 | ||
22 | #include <linux/config.h> | |
23 | #include <linux/kernel.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/mm.h> | |
26 | #include <linux/types.h> | |
27 | #include <linux/time.h> | |
28 | #include <linux/spinlock.h> | |
29 | #include <linux/bootmem.h> | |
30 | #include <linux/ioport.h> | |
31 | #include <linux/module.h> | |
32 | #include <linux/efi.h> | |
1bc3b91a | 33 | #include <linux/kexec.h> |
1da177e4 LT |
34 | |
35 | #include <asm/setup.h> | |
36 | #include <asm/io.h> | |
37 | #include <asm/page.h> | |
38 | #include <asm/pgtable.h> | |
39 | #include <asm/processor.h> | |
40 | #include <asm/desc.h> | |
41 | #include <asm/tlbflush.h> | |
42 | ||
43 | #define EFI_DEBUG 0 | |
44 | #define PFX "EFI: " | |
45 | ||
46 | extern efi_status_t asmlinkage efi_call_phys(void *, ...); | |
47 | ||
48 | struct efi efi; | |
49 | EXPORT_SYMBOL(efi); | |
c41f5eb3 | 50 | static struct efi efi_phys; |
51 | struct efi_memory_map memmap; | |
1da177e4 LT |
52 | |
53 | /* | |
54 | * We require an early boot_ioremap mapping mechanism initially | |
55 | */ | |
56 | extern void * boot_ioremap(unsigned long, unsigned long); | |
57 | ||
58 | /* | |
59 | * To make EFI call EFI runtime service in physical addressing mode we need | |
60 | * prelog/epilog before/after the invocation to disable interrupt, to | |
61 | * claim EFI runtime service handler exclusively and to duplicate a memory in | |
62 | * low memory space say 0 - 3G. | |
63 | */ | |
64 | ||
65 | static unsigned long efi_rt_eflags; | |
66 | static DEFINE_SPINLOCK(efi_rt_lock); | |
67 | static pgd_t efi_bak_pg_dir_pointer[2]; | |
68 | ||
69 | static void efi_call_phys_prelog(void) | |
70 | { | |
71 | unsigned long cr4; | |
72 | unsigned long temp; | |
73 | ||
74 | spin_lock(&efi_rt_lock); | |
75 | local_irq_save(efi_rt_eflags); | |
76 | ||
77 | /* | |
78 | * If I don't have PSE, I should just duplicate two entries in page | |
79 | * directory. If I have PSE, I just need to duplicate one entry in | |
80 | * page directory. | |
81 | */ | |
4bb0d3ec | 82 | cr4 = read_cr4(); |
1da177e4 LT |
83 | |
84 | if (cr4 & X86_CR4_PSE) { | |
85 | efi_bak_pg_dir_pointer[0].pgd = | |
86 | swapper_pg_dir[pgd_index(0)].pgd; | |
87 | swapper_pg_dir[0].pgd = | |
88 | swapper_pg_dir[pgd_index(PAGE_OFFSET)].pgd; | |
89 | } else { | |
90 | efi_bak_pg_dir_pointer[0].pgd = | |
91 | swapper_pg_dir[pgd_index(0)].pgd; | |
92 | efi_bak_pg_dir_pointer[1].pgd = | |
93 | swapper_pg_dir[pgd_index(0x400000)].pgd; | |
94 | swapper_pg_dir[pgd_index(0)].pgd = | |
95 | swapper_pg_dir[pgd_index(PAGE_OFFSET)].pgd; | |
96 | temp = PAGE_OFFSET + 0x400000; | |
97 | swapper_pg_dir[pgd_index(0x400000)].pgd = | |
98 | swapper_pg_dir[pgd_index(temp)].pgd; | |
99 | } | |
100 | ||
101 | /* | |
102 | * After the lock is released, the original page table is restored. | |
103 | */ | |
104 | local_flush_tlb(); | |
105 | ||
2b932f6c JB |
106 | per_cpu(cpu_gdt_descr, 0).address = |
107 | __pa(per_cpu(cpu_gdt_descr, 0).address); | |
108 | load_gdt((struct Xgt_desc_struct *)__pa(&per_cpu(cpu_gdt_descr, 0))); | |
1da177e4 LT |
109 | } |
110 | ||
111 | static void efi_call_phys_epilog(void) | |
112 | { | |
113 | unsigned long cr4; | |
114 | ||
2b932f6c JB |
115 | per_cpu(cpu_gdt_descr, 0).address = |
116 | (unsigned long)__va(per_cpu(cpu_gdt_descr, 0).address); | |
117 | load_gdt((struct Xgt_desc_struct *)__va(&per_cpu(cpu_gdt_descr, 0))); | |
118 | ||
4bb0d3ec | 119 | cr4 = read_cr4(); |
1da177e4 LT |
120 | |
121 | if (cr4 & X86_CR4_PSE) { | |
122 | swapper_pg_dir[pgd_index(0)].pgd = | |
123 | efi_bak_pg_dir_pointer[0].pgd; | |
124 | } else { | |
125 | swapper_pg_dir[pgd_index(0)].pgd = | |
126 | efi_bak_pg_dir_pointer[0].pgd; | |
127 | swapper_pg_dir[pgd_index(0x400000)].pgd = | |
128 | efi_bak_pg_dir_pointer[1].pgd; | |
129 | } | |
130 | ||
131 | /* | |
132 | * After the lock is released, the original page table is restored. | |
133 | */ | |
134 | local_flush_tlb(); | |
135 | ||
136 | local_irq_restore(efi_rt_eflags); | |
137 | spin_unlock(&efi_rt_lock); | |
138 | } | |
139 | ||
140 | static efi_status_t | |
141 | phys_efi_set_virtual_address_map(unsigned long memory_map_size, | |
142 | unsigned long descriptor_size, | |
143 | u32 descriptor_version, | |
144 | efi_memory_desc_t *virtual_map) | |
145 | { | |
146 | efi_status_t status; | |
147 | ||
148 | efi_call_phys_prelog(); | |
149 | status = efi_call_phys(efi_phys.set_virtual_address_map, | |
150 | memory_map_size, descriptor_size, | |
151 | descriptor_version, virtual_map); | |
152 | efi_call_phys_epilog(); | |
153 | return status; | |
154 | } | |
155 | ||
156 | static efi_status_t | |
157 | phys_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc) | |
158 | { | |
159 | efi_status_t status; | |
160 | ||
161 | efi_call_phys_prelog(); | |
162 | status = efi_call_phys(efi_phys.get_time, tm, tc); | |
163 | efi_call_phys_epilog(); | |
164 | return status; | |
165 | } | |
166 | ||
167 | inline int efi_set_rtc_mmss(unsigned long nowtime) | |
168 | { | |
169 | int real_seconds, real_minutes; | |
170 | efi_status_t status; | |
171 | efi_time_t eft; | |
172 | efi_time_cap_t cap; | |
173 | ||
174 | spin_lock(&efi_rt_lock); | |
175 | status = efi.get_time(&eft, &cap); | |
176 | spin_unlock(&efi_rt_lock); | |
177 | if (status != EFI_SUCCESS) | |
178 | panic("Ooops, efitime: can't read time!\n"); | |
179 | real_seconds = nowtime % 60; | |
180 | real_minutes = nowtime / 60; | |
181 | ||
182 | if (((abs(real_minutes - eft.minute) + 15)/30) & 1) | |
183 | real_minutes += 30; | |
184 | real_minutes %= 60; | |
185 | ||
186 | eft.minute = real_minutes; | |
187 | eft.second = real_seconds; | |
188 | ||
189 | if (status != EFI_SUCCESS) { | |
190 | printk("Ooops: efitime: can't read time!\n"); | |
191 | return -1; | |
192 | } | |
193 | return 0; | |
194 | } | |
195 | /* | |
196 | * This should only be used during kernel init and before runtime | |
197 | * services have been remapped, therefore, we'll need to call in physical | |
198 | * mode. Note, this call isn't used later, so mark it __init. | |
199 | */ | |
200 | inline unsigned long __init efi_get_time(void) | |
201 | { | |
202 | efi_status_t status; | |
203 | efi_time_t eft; | |
204 | efi_time_cap_t cap; | |
205 | ||
206 | status = phys_efi_get_time(&eft, &cap); | |
207 | if (status != EFI_SUCCESS) | |
208 | printk("Oops: efitime: can't read time status: 0x%lx\n",status); | |
209 | ||
210 | return mktime(eft.year, eft.month, eft.day, eft.hour, | |
211 | eft.minute, eft.second); | |
212 | } | |
213 | ||
214 | int is_available_memory(efi_memory_desc_t * md) | |
215 | { | |
216 | if (!(md->attribute & EFI_MEMORY_WB)) | |
217 | return 0; | |
218 | ||
219 | switch (md->type) { | |
220 | case EFI_LOADER_CODE: | |
221 | case EFI_LOADER_DATA: | |
222 | case EFI_BOOT_SERVICES_CODE: | |
223 | case EFI_BOOT_SERVICES_DATA: | |
224 | case EFI_CONVENTIONAL_MEMORY: | |
225 | return 1; | |
226 | } | |
227 | return 0; | |
228 | } | |
229 | ||
230 | /* | |
231 | * We need to map the EFI memory map again after paging_init(). | |
232 | */ | |
233 | void __init efi_map_memmap(void) | |
234 | { | |
235 | memmap.map = NULL; | |
236 | ||
7ae65fd3 MT |
237 | memmap.map = bt_ioremap((unsigned long) memmap.phys_map, |
238 | (memmap.nr_map * memmap.desc_size)); | |
1da177e4 LT |
239 | if (memmap.map == NULL) |
240 | printk(KERN_ERR PFX "Could not remap the EFI memmap!\n"); | |
7ae65fd3 MT |
241 | |
242 | memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size); | |
1da177e4 LT |
243 | } |
244 | ||
245 | #if EFI_DEBUG | |
246 | static void __init print_efi_memmap(void) | |
247 | { | |
248 | efi_memory_desc_t *md; | |
7ae65fd3 | 249 | void *p; |
1da177e4 LT |
250 | int i; |
251 | ||
7ae65fd3 MT |
252 | for (p = memmap.map, i = 0; p < memmap.map_end; p += memmap.desc_size, i++) { |
253 | md = p; | |
1da177e4 LT |
254 | printk(KERN_INFO "mem%02u: type=%u, attr=0x%llx, " |
255 | "range=[0x%016llx-0x%016llx) (%lluMB)\n", | |
256 | i, md->type, md->attribute, md->phys_addr, | |
257 | md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT), | |
258 | (md->num_pages >> (20 - EFI_PAGE_SHIFT))); | |
259 | } | |
260 | } | |
261 | #endif /* EFI_DEBUG */ | |
262 | ||
263 | /* | |
264 | * Walks the EFI memory map and calls CALLBACK once for each EFI | |
265 | * memory descriptor that has memory that is available for kernel use. | |
266 | */ | |
267 | void efi_memmap_walk(efi_freemem_callback_t callback, void *arg) | |
268 | { | |
269 | int prev_valid = 0; | |
270 | struct range { | |
271 | unsigned long start; | |
272 | unsigned long end; | |
273 | } prev, curr; | |
274 | efi_memory_desc_t *md; | |
275 | unsigned long start, end; | |
7ae65fd3 | 276 | void *p; |
1da177e4 | 277 | |
7ae65fd3 MT |
278 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { |
279 | md = p; | |
1da177e4 LT |
280 | |
281 | if ((md->num_pages == 0) || (!is_available_memory(md))) | |
282 | continue; | |
283 | ||
284 | curr.start = md->phys_addr; | |
285 | curr.end = curr.start + (md->num_pages << EFI_PAGE_SHIFT); | |
286 | ||
287 | if (!prev_valid) { | |
288 | prev = curr; | |
289 | prev_valid = 1; | |
290 | } else { | |
291 | if (curr.start < prev.start) | |
292 | printk(KERN_INFO PFX "Unordered memory map\n"); | |
293 | if (prev.end == curr.start) | |
294 | prev.end = curr.end; | |
295 | else { | |
296 | start = | |
297 | (unsigned long) (PAGE_ALIGN(prev.start)); | |
298 | end = (unsigned long) (prev.end & PAGE_MASK); | |
299 | if ((end > start) | |
300 | && (*callback) (start, end, arg) < 0) | |
301 | return; | |
302 | prev = curr; | |
303 | } | |
304 | } | |
305 | } | |
306 | if (prev_valid) { | |
307 | start = (unsigned long) PAGE_ALIGN(prev.start); | |
308 | end = (unsigned long) (prev.end & PAGE_MASK); | |
309 | if (end > start) | |
310 | (*callback) (start, end, arg); | |
311 | } | |
312 | } | |
313 | ||
314 | void __init efi_init(void) | |
315 | { | |
316 | efi_config_table_t *config_tables; | |
317 | efi_runtime_services_t *runtime; | |
318 | efi_char16_t *c16; | |
319 | char vendor[100] = "unknown"; | |
320 | unsigned long num_config_tables; | |
321 | int i = 0; | |
322 | ||
323 | memset(&efi, 0, sizeof(efi) ); | |
324 | memset(&efi_phys, 0, sizeof(efi_phys)); | |
325 | ||
326 | efi_phys.systab = EFI_SYSTAB; | |
327 | memmap.phys_map = EFI_MEMMAP; | |
328 | memmap.nr_map = EFI_MEMMAP_SIZE/EFI_MEMDESC_SIZE; | |
329 | memmap.desc_version = EFI_MEMDESC_VERSION; | |
7ae65fd3 | 330 | memmap.desc_size = EFI_MEMDESC_SIZE; |
1da177e4 LT |
331 | |
332 | efi.systab = (efi_system_table_t *) | |
333 | boot_ioremap((unsigned long) efi_phys.systab, | |
334 | sizeof(efi_system_table_t)); | |
335 | /* | |
336 | * Verify the EFI Table | |
337 | */ | |
338 | if (efi.systab == NULL) | |
339 | printk(KERN_ERR PFX "Woah! Couldn't map the EFI system table.\n"); | |
340 | if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) | |
341 | printk(KERN_ERR PFX "Woah! EFI system table signature incorrect\n"); | |
342 | if ((efi.systab->hdr.revision ^ EFI_SYSTEM_TABLE_REVISION) >> 16 != 0) | |
343 | printk(KERN_ERR PFX | |
344 | "Warning: EFI system table major version mismatch: " | |
345 | "got %d.%02d, expected %d.%02d\n", | |
346 | efi.systab->hdr.revision >> 16, | |
347 | efi.systab->hdr.revision & 0xffff, | |
348 | EFI_SYSTEM_TABLE_REVISION >> 16, | |
349 | EFI_SYSTEM_TABLE_REVISION & 0xffff); | |
350 | /* | |
351 | * Grab some details from the system table | |
352 | */ | |
353 | num_config_tables = efi.systab->nr_tables; | |
354 | config_tables = (efi_config_table_t *)efi.systab->tables; | |
355 | runtime = efi.systab->runtime; | |
356 | ||
357 | /* | |
358 | * Show what we know for posterity | |
359 | */ | |
360 | c16 = (efi_char16_t *) boot_ioremap(efi.systab->fw_vendor, 2); | |
361 | if (c16) { | |
362 | for (i = 0; i < sizeof(vendor) && *c16; ++i) | |
363 | vendor[i] = *c16++; | |
364 | vendor[i] = '\0'; | |
365 | } else | |
366 | printk(KERN_ERR PFX "Could not map the firmware vendor!\n"); | |
367 | ||
368 | printk(KERN_INFO PFX "EFI v%u.%.02u by %s \n", | |
369 | efi.systab->hdr.revision >> 16, | |
370 | efi.systab->hdr.revision & 0xffff, vendor); | |
371 | ||
372 | /* | |
373 | * Let's see what config tables the firmware passed to us. | |
374 | */ | |
375 | config_tables = (efi_config_table_t *) | |
376 | boot_ioremap((unsigned long) config_tables, | |
377 | num_config_tables * sizeof(efi_config_table_t)); | |
378 | ||
379 | if (config_tables == NULL) | |
380 | printk(KERN_ERR PFX "Could not map EFI Configuration Table!\n"); | |
381 | ||
382 | for (i = 0; i < num_config_tables; i++) { | |
383 | if (efi_guidcmp(config_tables[i].guid, MPS_TABLE_GUID) == 0) { | |
384 | efi.mps = (void *)config_tables[i].table; | |
385 | printk(KERN_INFO " MPS=0x%lx ", config_tables[i].table); | |
386 | } else | |
387 | if (efi_guidcmp(config_tables[i].guid, ACPI_20_TABLE_GUID) == 0) { | |
388 | efi.acpi20 = __va(config_tables[i].table); | |
389 | printk(KERN_INFO " ACPI 2.0=0x%lx ", config_tables[i].table); | |
390 | } else | |
391 | if (efi_guidcmp(config_tables[i].guid, ACPI_TABLE_GUID) == 0) { | |
392 | efi.acpi = __va(config_tables[i].table); | |
393 | printk(KERN_INFO " ACPI=0x%lx ", config_tables[i].table); | |
394 | } else | |
395 | if (efi_guidcmp(config_tables[i].guid, SMBIOS_TABLE_GUID) == 0) { | |
396 | efi.smbios = (void *) config_tables[i].table; | |
397 | printk(KERN_INFO " SMBIOS=0x%lx ", config_tables[i].table); | |
398 | } else | |
399 | if (efi_guidcmp(config_tables[i].guid, HCDP_TABLE_GUID) == 0) { | |
400 | efi.hcdp = (void *)config_tables[i].table; | |
401 | printk(KERN_INFO " HCDP=0x%lx ", config_tables[i].table); | |
402 | } else | |
403 | if (efi_guidcmp(config_tables[i].guid, UGA_IO_PROTOCOL_GUID) == 0) { | |
404 | efi.uga = (void *)config_tables[i].table; | |
405 | printk(KERN_INFO " UGA=0x%lx ", config_tables[i].table); | |
406 | } | |
407 | } | |
408 | printk("\n"); | |
409 | ||
410 | /* | |
411 | * Check out the runtime services table. We need to map | |
412 | * the runtime services table so that we can grab the physical | |
413 | * address of several of the EFI runtime functions, needed to | |
414 | * set the firmware into virtual mode. | |
415 | */ | |
416 | ||
417 | runtime = (efi_runtime_services_t *) boot_ioremap((unsigned long) | |
418 | runtime, | |
419 | sizeof(efi_runtime_services_t)); | |
420 | if (runtime != NULL) { | |
421 | /* | |
422 | * We will only need *early* access to the following | |
423 | * two EFI runtime services before set_virtual_address_map | |
424 | * is invoked. | |
425 | */ | |
426 | efi_phys.get_time = (efi_get_time_t *) runtime->get_time; | |
427 | efi_phys.set_virtual_address_map = | |
428 | (efi_set_virtual_address_map_t *) | |
429 | runtime->set_virtual_address_map; | |
430 | } else | |
431 | printk(KERN_ERR PFX "Could not map the runtime service table!\n"); | |
432 | ||
433 | /* Map the EFI memory map for use until paging_init() */ | |
7ae65fd3 | 434 | memmap.map = boot_ioremap((unsigned long) EFI_MEMMAP, EFI_MEMMAP_SIZE); |
1da177e4 LT |
435 | if (memmap.map == NULL) |
436 | printk(KERN_ERR PFX "Could not map the EFI memory map!\n"); | |
437 | ||
7ae65fd3 MT |
438 | memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size); |
439 | ||
1da177e4 LT |
440 | #if EFI_DEBUG |
441 | print_efi_memmap(); | |
442 | #endif | |
443 | } | |
444 | ||
7ae65fd3 MT |
445 | static inline void __init check_range_for_systab(efi_memory_desc_t *md) |
446 | { | |
447 | if (((unsigned long)md->phys_addr <= (unsigned long)efi_phys.systab) && | |
448 | ((unsigned long)efi_phys.systab < md->phys_addr + | |
449 | ((unsigned long)md->num_pages << EFI_PAGE_SHIFT))) { | |
450 | unsigned long addr; | |
451 | ||
452 | addr = md->virt_addr - md->phys_addr + | |
453 | (unsigned long)efi_phys.systab; | |
454 | efi.systab = (efi_system_table_t *)addr; | |
455 | } | |
456 | } | |
457 | ||
1da177e4 LT |
458 | /* |
459 | * This function will switch the EFI runtime services to virtual mode. | |
460 | * Essentially, look through the EFI memmap and map every region that | |
461 | * has the runtime attribute bit set in its memory descriptor and update | |
462 | * that memory descriptor with the virtual address obtained from ioremap(). | |
463 | * This enables the runtime services to be called without having to | |
464 | * thunk back into physical mode for every invocation. | |
465 | */ | |
466 | ||
467 | void __init efi_enter_virtual_mode(void) | |
468 | { | |
469 | efi_memory_desc_t *md; | |
470 | efi_status_t status; | |
7ae65fd3 | 471 | void *p; |
1da177e4 LT |
472 | |
473 | efi.systab = NULL; | |
474 | ||
7ae65fd3 MT |
475 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { |
476 | md = p; | |
1da177e4 | 477 | |
7ae65fd3 MT |
478 | if (!(md->attribute & EFI_MEMORY_RUNTIME)) |
479 | continue; | |
1da177e4 | 480 | |
7ae65fd3 MT |
481 | md->virt_addr = (unsigned long)ioremap(md->phys_addr, |
482 | md->num_pages << EFI_PAGE_SHIFT); | |
483 | if (!(unsigned long)md->virt_addr) { | |
484 | printk(KERN_ERR PFX "ioremap of 0x%lX failed\n", | |
485 | (unsigned long)md->phys_addr); | |
1da177e4 | 486 | } |
7ae65fd3 MT |
487 | /* update the virtual address of the EFI system table */ |
488 | check_range_for_systab(md); | |
1da177e4 LT |
489 | } |
490 | ||
491 | if (!efi.systab) | |
492 | BUG(); | |
493 | ||
494 | status = phys_efi_set_virtual_address_map( | |
7ae65fd3 MT |
495 | memmap.desc_size * memmap.nr_map, |
496 | memmap.desc_size, | |
1da177e4 LT |
497 | memmap.desc_version, |
498 | memmap.phys_map); | |
499 | ||
500 | if (status != EFI_SUCCESS) { | |
501 | printk (KERN_ALERT "You are screwed! " | |
502 | "Unable to switch EFI into virtual mode " | |
503 | "(status=%lx)\n", status); | |
504 | panic("EFI call to SetVirtualAddressMap() failed!"); | |
505 | } | |
506 | ||
507 | /* | |
508 | * Now that EFI is in virtual mode, update the function | |
509 | * pointers in the runtime service table to the new virtual addresses. | |
510 | */ | |
511 | ||
512 | efi.get_time = (efi_get_time_t *) efi.systab->runtime->get_time; | |
513 | efi.set_time = (efi_set_time_t *) efi.systab->runtime->set_time; | |
514 | efi.get_wakeup_time = (efi_get_wakeup_time_t *) | |
515 | efi.systab->runtime->get_wakeup_time; | |
516 | efi.set_wakeup_time = (efi_set_wakeup_time_t *) | |
517 | efi.systab->runtime->set_wakeup_time; | |
518 | efi.get_variable = (efi_get_variable_t *) | |
519 | efi.systab->runtime->get_variable; | |
520 | efi.get_next_variable = (efi_get_next_variable_t *) | |
521 | efi.systab->runtime->get_next_variable; | |
522 | efi.set_variable = (efi_set_variable_t *) | |
523 | efi.systab->runtime->set_variable; | |
524 | efi.get_next_high_mono_count = (efi_get_next_high_mono_count_t *) | |
525 | efi.systab->runtime->get_next_high_mono_count; | |
526 | efi.reset_system = (efi_reset_system_t *) | |
527 | efi.systab->runtime->reset_system; | |
528 | } | |
529 | ||
530 | void __init | |
531 | efi_initialize_iomem_resources(struct resource *code_resource, | |
532 | struct resource *data_resource) | |
533 | { | |
534 | struct resource *res; | |
535 | efi_memory_desc_t *md; | |
7ae65fd3 | 536 | void *p; |
1da177e4 | 537 | |
7ae65fd3 MT |
538 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { |
539 | md = p; | |
1da177e4 LT |
540 | |
541 | if ((md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT)) > | |
542 | 0x100000000ULL) | |
543 | continue; | |
544 | res = alloc_bootmem_low(sizeof(struct resource)); | |
545 | switch (md->type) { | |
546 | case EFI_RESERVED_TYPE: | |
547 | res->name = "Reserved Memory"; | |
548 | break; | |
549 | case EFI_LOADER_CODE: | |
550 | res->name = "Loader Code"; | |
551 | break; | |
552 | case EFI_LOADER_DATA: | |
553 | res->name = "Loader Data"; | |
554 | break; | |
555 | case EFI_BOOT_SERVICES_DATA: | |
556 | res->name = "BootServices Data"; | |
557 | break; | |
558 | case EFI_BOOT_SERVICES_CODE: | |
559 | res->name = "BootServices Code"; | |
560 | break; | |
561 | case EFI_RUNTIME_SERVICES_CODE: | |
562 | res->name = "Runtime Service Code"; | |
563 | break; | |
564 | case EFI_RUNTIME_SERVICES_DATA: | |
565 | res->name = "Runtime Service Data"; | |
566 | break; | |
567 | case EFI_CONVENTIONAL_MEMORY: | |
568 | res->name = "Conventional Memory"; | |
569 | break; | |
570 | case EFI_UNUSABLE_MEMORY: | |
571 | res->name = "Unusable Memory"; | |
572 | break; | |
573 | case EFI_ACPI_RECLAIM_MEMORY: | |
574 | res->name = "ACPI Reclaim"; | |
575 | break; | |
576 | case EFI_ACPI_MEMORY_NVS: | |
577 | res->name = "ACPI NVS"; | |
578 | break; | |
579 | case EFI_MEMORY_MAPPED_IO: | |
580 | res->name = "Memory Mapped IO"; | |
581 | break; | |
582 | case EFI_MEMORY_MAPPED_IO_PORT_SPACE: | |
583 | res->name = "Memory Mapped IO Port Space"; | |
584 | break; | |
585 | default: | |
586 | res->name = "Reserved"; | |
587 | break; | |
588 | } | |
589 | res->start = md->phys_addr; | |
590 | res->end = res->start + ((md->num_pages << EFI_PAGE_SHIFT) - 1); | |
591 | res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; | |
592 | if (request_resource(&iomem_resource, res) < 0) | |
593 | printk(KERN_ERR PFX "Failed to allocate res %s : 0x%lx-0x%lx\n", | |
594 | res->name, res->start, res->end); | |
595 | /* | |
596 | * We don't know which region contains kernel data so we try | |
597 | * it repeatedly and let the resource manager test it. | |
598 | */ | |
599 | if (md->type == EFI_CONVENTIONAL_MEMORY) { | |
600 | request_resource(res, code_resource); | |
601 | request_resource(res, data_resource); | |
1bc3b91a EB |
602 | #ifdef CONFIG_KEXEC |
603 | request_resource(res, &crashk_res); | |
604 | #endif | |
1da177e4 LT |
605 | } |
606 | } | |
607 | } | |
608 | ||
609 | /* | |
610 | * Convenience functions to obtain memory types and attributes | |
611 | */ | |
612 | ||
613 | u32 efi_mem_type(unsigned long phys_addr) | |
614 | { | |
615 | efi_memory_desc_t *md; | |
7ae65fd3 | 616 | void *p; |
1da177e4 | 617 | |
7ae65fd3 MT |
618 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { |
619 | md = p; | |
1da177e4 LT |
620 | if ((md->phys_addr <= phys_addr) && (phys_addr < |
621 | (md->phys_addr + (md-> num_pages << EFI_PAGE_SHIFT)) )) | |
622 | return md->type; | |
623 | } | |
624 | return 0; | |
625 | } | |
626 | ||
627 | u64 efi_mem_attributes(unsigned long phys_addr) | |
628 | { | |
629 | efi_memory_desc_t *md; | |
7ae65fd3 | 630 | void *p; |
1da177e4 | 631 | |
7ae65fd3 MT |
632 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { |
633 | md = p; | |
1da177e4 LT |
634 | if ((md->phys_addr <= phys_addr) && (phys_addr < |
635 | (md->phys_addr + (md-> num_pages << EFI_PAGE_SHIFT)) )) | |
636 | return md->attribute; | |
637 | } | |
638 | return 0; | |
639 | } |