Commit | Line | Data |
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5b83683f HY |
1 | /* |
2 | * x86_64 specific EFI support functions | |
3 | * Based on Extensible Firmware Interface Specification version 1.0 | |
4 | * | |
5 | * Copyright (C) 2005-2008 Intel Co. | |
6 | * Fenghua Yu <fenghua.yu@intel.com> | |
7 | * Bibo Mao <bibo.mao@intel.com> | |
8 | * Chandramouli Narayanan <mouli@linux.intel.com> | |
9 | * Huang Ying <ying.huang@intel.com> | |
10 | * | |
11 | * Code to convert EFI to E820 map has been implemented in elilo bootloader | |
12 | * based on a EFI patch by Edgar Hucek. Based on the E820 map, the page table | |
13 | * is setup appropriately for EFI runtime code. | |
14 | * - mouli 06/14/2007. | |
15 | * | |
16 | */ | |
17 | ||
18 | #include <linux/kernel.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/mm.h> | |
21 | #include <linux/types.h> | |
22 | #include <linux/spinlock.h> | |
23 | #include <linux/bootmem.h> | |
24 | #include <linux/ioport.h> | |
25 | #include <linux/module.h> | |
26 | #include <linux/efi.h> | |
27 | #include <linux/uaccess.h> | |
28 | #include <linux/io.h> | |
29 | #include <linux/reboot.h> | |
0d01ff25 | 30 | #include <linux/slab.h> |
5b83683f HY |
31 | |
32 | #include <asm/setup.h> | |
33 | #include <asm/page.h> | |
34 | #include <asm/e820.h> | |
35 | #include <asm/pgtable.h> | |
36 | #include <asm/tlbflush.h> | |
5b83683f HY |
37 | #include <asm/proto.h> |
38 | #include <asm/efi.h> | |
4de0d4a6 | 39 | #include <asm/cacheflush.h> |
3819cd48 | 40 | #include <asm/fixmap.h> |
d2f7cbe7 | 41 | #include <asm/realmode.h> |
4f9dbcfc | 42 | #include <asm/time.h> |
5b83683f | 43 | |
b8f2c21d | 44 | static pgd_t *save_pgd __initdata; |
5b83683f HY |
45 | static unsigned long efi_flags __initdata; |
46 | ||
d2f7cbe7 BP |
47 | /* |
48 | * We allocate runtime services regions bottom-up, starting from -4G, i.e. | |
49 | * 0xffff_ffff_0000_0000 and limit EFI VA mapping space to 64G. | |
50 | */ | |
51 | static u64 efi_va = -4 * (1UL << 30); | |
52 | #define EFI_VA_END (-68 * (1UL << 30)) | |
53 | ||
54 | /* | |
55 | * Scratch space used for switching the pagetable in the EFI stub | |
56 | */ | |
57 | struct efi_scratch { | |
58 | u64 r15; | |
59 | u64 prev_cr3; | |
60 | pgd_t *efi_pgt; | |
61 | bool use_pgd; | |
4f9dbcfc MF |
62 | u64 phys_stack; |
63 | } __packed; | |
d2f7cbe7 | 64 | |
9cd2b07c | 65 | static void __init early_code_mapping_set_exec(int executable) |
5b83683f HY |
66 | { |
67 | efi_memory_desc_t *md; | |
68 | void *p; | |
69 | ||
a2172e25 HY |
70 | if (!(__supported_pte_mask & _PAGE_NX)) |
71 | return; | |
72 | ||
916f676f | 73 | /* Make EFI service code area executable */ |
5b83683f HY |
74 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { |
75 | md = p; | |
916f676f MG |
76 | if (md->type == EFI_RUNTIME_SERVICES_CODE || |
77 | md->type == EFI_BOOT_SERVICES_CODE) | |
9cd2b07c | 78 | efi_set_executable(md, executable); |
5b83683f HY |
79 | } |
80 | } | |
81 | ||
82 | void __init efi_call_phys_prelog(void) | |
83 | { | |
84 | unsigned long vaddress; | |
b8f2c21d NZ |
85 | int pgd; |
86 | int n_pgds; | |
5b83683f | 87 | |
d2f7cbe7 BP |
88 | if (!efi_enabled(EFI_OLD_MEMMAP)) |
89 | return; | |
90 | ||
9cd2b07c | 91 | early_code_mapping_set_exec(1); |
4de0d4a6 | 92 | local_irq_save(efi_flags); |
b8f2c21d NZ |
93 | |
94 | n_pgds = DIV_ROUND_UP((max_pfn << PAGE_SHIFT), PGDIR_SIZE); | |
95 | save_pgd = kmalloc(n_pgds * sizeof(pgd_t), GFP_KERNEL); | |
96 | ||
97 | for (pgd = 0; pgd < n_pgds; pgd++) { | |
98 | save_pgd[pgd] = *pgd_offset_k(pgd * PGDIR_SIZE); | |
99 | vaddress = (unsigned long)__va(pgd * PGDIR_SIZE); | |
100 | set_pgd(pgd_offset_k(pgd * PGDIR_SIZE), *pgd_offset_k(vaddress)); | |
101 | } | |
5b83683f HY |
102 | __flush_tlb_all(); |
103 | } | |
104 | ||
105 | void __init efi_call_phys_epilog(void) | |
106 | { | |
107 | /* | |
108 | * After the lock is released, the original page table is restored. | |
109 | */ | |
b8f2c21d NZ |
110 | int pgd; |
111 | int n_pgds = DIV_ROUND_UP((max_pfn << PAGE_SHIFT) , PGDIR_SIZE); | |
d2f7cbe7 BP |
112 | |
113 | if (!efi_enabled(EFI_OLD_MEMMAP)) | |
114 | return; | |
115 | ||
b8f2c21d NZ |
116 | for (pgd = 0; pgd < n_pgds; pgd++) |
117 | set_pgd(pgd_offset_k(pgd * PGDIR_SIZE), save_pgd[pgd]); | |
118 | kfree(save_pgd); | |
5b83683f HY |
119 | __flush_tlb_all(); |
120 | local_irq_restore(efi_flags); | |
9cd2b07c | 121 | early_code_mapping_set_exec(0); |
5b83683f | 122 | } |
e1ad783b | 123 | |
d2f7cbe7 BP |
124 | /* |
125 | * Add low kernel mappings for passing arguments to EFI functions. | |
126 | */ | |
127 | void efi_sync_low_kernel_mappings(void) | |
128 | { | |
129 | unsigned num_pgds; | |
130 | pgd_t *pgd = (pgd_t *)__va(real_mode_header->trampoline_pgd); | |
131 | ||
132 | if (efi_enabled(EFI_OLD_MEMMAP)) | |
133 | return; | |
134 | ||
135 | num_pgds = pgd_index(MODULES_END - 1) - pgd_index(PAGE_OFFSET); | |
136 | ||
137 | memcpy(pgd + pgd_index(PAGE_OFFSET), | |
138 | init_mm.pgd + pgd_index(PAGE_OFFSET), | |
139 | sizeof(pgd_t) * num_pgds); | |
140 | } | |
141 | ||
b7b898ae | 142 | int efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages) |
d2f7cbe7 | 143 | { |
4f9dbcfc | 144 | unsigned long text; |
4f9dbcfc | 145 | struct page *page; |
994448f1 | 146 | unsigned npages; |
b7b898ae BP |
147 | pgd_t *pgd; |
148 | ||
149 | if (efi_enabled(EFI_OLD_MEMMAP)) | |
150 | return 0; | |
151 | ||
d2f7cbe7 | 152 | efi_scratch.efi_pgt = (pgd_t *)(unsigned long)real_mode_header->trampoline_pgd; |
b7b898ae | 153 | pgd = __va(efi_scratch.efi_pgt); |
d2f7cbe7 | 154 | |
b7b898ae BP |
155 | /* |
156 | * It can happen that the physical address of new_memmap lands in memory | |
157 | * which is not mapped in the EFI page table. Therefore we need to go | |
158 | * and ident-map those pages containing the map before calling | |
159 | * phys_efi_set_virtual_address_map(). | |
160 | */ | |
161 | if (kernel_map_pages_in_pgd(pgd, pa_memmap, pa_memmap, num_pages, _PAGE_NX)) { | |
162 | pr_err("Error ident-mapping new memmap (0x%lx)!\n", pa_memmap); | |
163 | return 1; | |
164 | } | |
165 | ||
166 | efi_scratch.use_pgd = true; | |
167 | ||
4f9dbcfc MF |
168 | /* |
169 | * When making calls to the firmware everything needs to be 1:1 | |
170 | * mapped and addressable with 32-bit pointers. Map the kernel | |
171 | * text and allocate a new stack because we can't rely on the | |
172 | * stack pointer being < 4GB. | |
173 | */ | |
174 | if (!IS_ENABLED(CONFIG_EFI_MIXED)) | |
994448f1 | 175 | return 0; |
4f9dbcfc MF |
176 | |
177 | page = alloc_page(GFP_KERNEL|__GFP_DMA32); | |
178 | if (!page) | |
179 | panic("Unable to allocate EFI runtime stack < 4GB\n"); | |
180 | ||
181 | efi_scratch.phys_stack = virt_to_phys(page_address(page)); | |
182 | efi_scratch.phys_stack += PAGE_SIZE; /* stack grows down */ | |
183 | ||
184 | npages = (_end - _text) >> PAGE_SHIFT; | |
185 | text = __pa(_text); | |
186 | ||
994448f1 | 187 | if (kernel_map_pages_in_pgd(pgd, text >> PAGE_SHIFT, text, npages, 0)) { |
4f9dbcfc | 188 | pr_err("Failed to map kernel text 1:1\n"); |
994448f1 | 189 | return 1; |
4f9dbcfc | 190 | } |
b7b898ae BP |
191 | |
192 | return 0; | |
193 | } | |
194 | ||
195 | void efi_cleanup_page_tables(unsigned long pa_memmap, unsigned num_pages) | |
196 | { | |
197 | pgd_t *pgd = (pgd_t *)__va(real_mode_header->trampoline_pgd); | |
198 | ||
199 | kernel_unmap_pages_in_pgd(pgd, pa_memmap, num_pages); | |
d2f7cbe7 BP |
200 | } |
201 | ||
202 | static void __init __map_region(efi_memory_desc_t *md, u64 va) | |
203 | { | |
204 | pgd_t *pgd = (pgd_t *)__va(real_mode_header->trampoline_pgd); | |
2da6e57c | 205 | unsigned long pf = 0; |
d2f7cbe7 BP |
206 | |
207 | if (!(md->attribute & EFI_MEMORY_WB)) | |
208 | pf |= _PAGE_PCD; | |
209 | ||
d2f7cbe7 BP |
210 | if (kernel_map_pages_in_pgd(pgd, md->phys_addr, va, md->num_pages, pf)) |
211 | pr_warn("Error mapping PA 0x%llx -> VA 0x%llx!\n", | |
212 | md->phys_addr, va); | |
213 | } | |
214 | ||
215 | void __init efi_map_region(efi_memory_desc_t *md) | |
216 | { | |
217 | unsigned long size = md->num_pages << PAGE_SHIFT; | |
218 | u64 pa = md->phys_addr; | |
219 | ||
220 | if (efi_enabled(EFI_OLD_MEMMAP)) | |
221 | return old_map_region(md); | |
222 | ||
223 | /* | |
224 | * Make sure the 1:1 mappings are present as a catch-all for b0rked | |
225 | * firmware which doesn't update all internal pointers after switching | |
226 | * to virtual mode and would otherwise crap on us. | |
227 | */ | |
228 | __map_region(md, md->phys_addr); | |
229 | ||
4f9dbcfc MF |
230 | /* |
231 | * Enforce the 1:1 mapping as the default virtual address when | |
232 | * booting in EFI mixed mode, because even though we may be | |
233 | * running a 64-bit kernel, the firmware may only be 32-bit. | |
234 | */ | |
235 | if (!efi_is_native () && IS_ENABLED(CONFIG_EFI_MIXED)) { | |
236 | md->virt_addr = md->phys_addr; | |
237 | return; | |
238 | } | |
239 | ||
d2f7cbe7 BP |
240 | efi_va -= size; |
241 | ||
242 | /* Is PA 2M-aligned? */ | |
243 | if (!(pa & (PMD_SIZE - 1))) { | |
244 | efi_va &= PMD_MASK; | |
245 | } else { | |
246 | u64 pa_offset = pa & (PMD_SIZE - 1); | |
247 | u64 prev_va = efi_va; | |
248 | ||
249 | /* get us the same offset within this 2M page */ | |
250 | efi_va = (efi_va & PMD_MASK) + pa_offset; | |
251 | ||
252 | if (efi_va > prev_va) | |
253 | efi_va -= PMD_SIZE; | |
254 | } | |
255 | ||
256 | if (efi_va < EFI_VA_END) { | |
257 | pr_warn(FW_WARN "VA address range overflow!\n"); | |
258 | return; | |
259 | } | |
260 | ||
261 | /* Do the VA map */ | |
262 | __map_region(md, efi_va); | |
263 | md->virt_addr = efi_va; | |
264 | } | |
265 | ||
3b266496 DY |
266 | /* |
267 | * kexec kernel will use efi_map_region_fixed to map efi runtime memory ranges. | |
268 | * md->virt_addr is the original virtual address which had been mapped in kexec | |
269 | * 1st kernel. | |
270 | */ | |
271 | void __init efi_map_region_fixed(efi_memory_desc_t *md) | |
272 | { | |
273 | __map_region(md, md->virt_addr); | |
274 | } | |
275 | ||
e1ad783b | 276 | void __iomem *__init efi_ioremap(unsigned long phys_addr, unsigned long size, |
3e8fa263 | 277 | u32 type, u64 attribute) |
e1ad783b KP |
278 | { |
279 | unsigned long last_map_pfn; | |
280 | ||
281 | if (type == EFI_MEMORY_MAPPED_IO) | |
282 | return ioremap(phys_addr, size); | |
283 | ||
284 | last_map_pfn = init_memory_mapping(phys_addr, phys_addr + size); | |
285 | if ((last_map_pfn << PAGE_SHIFT) < phys_addr + size) { | |
286 | unsigned long top = last_map_pfn << PAGE_SHIFT; | |
3e8fa263 | 287 | efi_ioremap(top, size - (top - phys_addr), type, attribute); |
e1ad783b KP |
288 | } |
289 | ||
3e8fa263 MF |
290 | if (!(attribute & EFI_MEMORY_WB)) |
291 | efi_memory_uc((u64)(unsigned long)__va(phys_addr), size); | |
292 | ||
e1ad783b KP |
293 | return (void __iomem *)__va(phys_addr); |
294 | } | |
1fec0533 DY |
295 | |
296 | void __init parse_efi_setup(u64 phys_addr, u32 data_len) | |
297 | { | |
298 | efi_setup = phys_addr + sizeof(struct setup_data); | |
1fec0533 | 299 | } |
c55d016f BP |
300 | |
301 | void __init efi_runtime_mkexec(void) | |
302 | { | |
303 | if (!efi_enabled(EFI_OLD_MEMMAP)) | |
304 | return; | |
305 | ||
306 | if (__supported_pte_mask & _PAGE_NX) | |
307 | runtime_code_page_mkexec(); | |
308 | } | |
11cc8512 BP |
309 | |
310 | void __init efi_dump_pagetable(void) | |
311 | { | |
312 | #ifdef CONFIG_EFI_PGT_DUMP | |
313 | pgd_t *pgd = (pgd_t *)__va(real_mode_header->trampoline_pgd); | |
314 | ||
315 | ptdump_walk_pgd_level(NULL, pgd); | |
316 | #endif | |
317 | } | |
994448f1 | 318 | |
4f9dbcfc MF |
319 | #ifdef CONFIG_EFI_MIXED |
320 | extern efi_status_t efi64_thunk(u32, ...); | |
321 | ||
322 | #define runtime_service32(func) \ | |
323 | ({ \ | |
324 | u32 table = (u32)(unsigned long)efi.systab; \ | |
325 | u32 *rt, *___f; \ | |
326 | \ | |
327 | rt = (u32 *)(table + offsetof(efi_system_table_32_t, runtime)); \ | |
328 | ___f = (u32 *)(*rt + offsetof(efi_runtime_services_32_t, func)); \ | |
329 | *___f; \ | |
330 | }) | |
331 | ||
332 | /* | |
333 | * Switch to the EFI page tables early so that we can access the 1:1 | |
334 | * runtime services mappings which are not mapped in any other page | |
335 | * tables. This function must be called before runtime_service32(). | |
336 | * | |
337 | * Also, disable interrupts because the IDT points to 64-bit handlers, | |
338 | * which aren't going to function correctly when we switch to 32-bit. | |
339 | */ | |
340 | #define efi_thunk(f, ...) \ | |
341 | ({ \ | |
342 | efi_status_t __s; \ | |
343 | unsigned long flags; \ | |
344 | u32 func; \ | |
345 | \ | |
346 | efi_sync_low_kernel_mappings(); \ | |
347 | local_irq_save(flags); \ | |
348 | \ | |
349 | efi_scratch.prev_cr3 = read_cr3(); \ | |
350 | write_cr3((unsigned long)efi_scratch.efi_pgt); \ | |
351 | __flush_tlb_all(); \ | |
352 | \ | |
353 | func = runtime_service32(f); \ | |
354 | __s = efi64_thunk(func, __VA_ARGS__); \ | |
355 | \ | |
356 | write_cr3(efi_scratch.prev_cr3); \ | |
357 | __flush_tlb_all(); \ | |
358 | local_irq_restore(flags); \ | |
359 | \ | |
360 | __s; \ | |
361 | }) | |
362 | ||
363 | efi_status_t efi_thunk_set_virtual_address_map( | |
364 | void *phys_set_virtual_address_map, | |
365 | unsigned long memory_map_size, | |
366 | unsigned long descriptor_size, | |
367 | u32 descriptor_version, | |
368 | efi_memory_desc_t *virtual_map) | |
369 | { | |
370 | efi_status_t status; | |
371 | unsigned long flags; | |
372 | u32 func; | |
373 | ||
374 | efi_sync_low_kernel_mappings(); | |
375 | local_irq_save(flags); | |
376 | ||
377 | efi_scratch.prev_cr3 = read_cr3(); | |
378 | write_cr3((unsigned long)efi_scratch.efi_pgt); | |
379 | __flush_tlb_all(); | |
380 | ||
381 | func = (u32)(unsigned long)phys_set_virtual_address_map; | |
382 | status = efi64_thunk(func, memory_map_size, descriptor_size, | |
383 | descriptor_version, virtual_map); | |
384 | ||
385 | write_cr3(efi_scratch.prev_cr3); | |
386 | __flush_tlb_all(); | |
387 | local_irq_restore(flags); | |
388 | ||
389 | return status; | |
390 | } | |
391 | ||
392 | static efi_status_t efi_thunk_get_time(efi_time_t *tm, efi_time_cap_t *tc) | |
393 | { | |
394 | efi_status_t status; | |
395 | u32 phys_tm, phys_tc; | |
396 | ||
397 | spin_lock(&rtc_lock); | |
398 | ||
399 | phys_tm = virt_to_phys(tm); | |
400 | phys_tc = virt_to_phys(tc); | |
401 | ||
402 | status = efi_thunk(get_time, phys_tm, phys_tc); | |
403 | ||
404 | spin_unlock(&rtc_lock); | |
405 | ||
406 | return status; | |
407 | } | |
408 | ||
409 | static efi_status_t efi_thunk_set_time(efi_time_t *tm) | |
410 | { | |
411 | efi_status_t status; | |
412 | u32 phys_tm; | |
413 | ||
414 | spin_lock(&rtc_lock); | |
415 | ||
416 | phys_tm = virt_to_phys(tm); | |
417 | ||
418 | status = efi_thunk(set_time, phys_tm); | |
419 | ||
420 | spin_unlock(&rtc_lock); | |
421 | ||
422 | return status; | |
423 | } | |
424 | ||
425 | static efi_status_t | |
426 | efi_thunk_get_wakeup_time(efi_bool_t *enabled, efi_bool_t *pending, | |
427 | efi_time_t *tm) | |
428 | { | |
429 | efi_status_t status; | |
430 | u32 phys_enabled, phys_pending, phys_tm; | |
431 | ||
432 | spin_lock(&rtc_lock); | |
433 | ||
434 | phys_enabled = virt_to_phys(enabled); | |
435 | phys_pending = virt_to_phys(pending); | |
436 | phys_tm = virt_to_phys(tm); | |
437 | ||
438 | status = efi_thunk(get_wakeup_time, phys_enabled, | |
439 | phys_pending, phys_tm); | |
440 | ||
441 | spin_unlock(&rtc_lock); | |
442 | ||
443 | return status; | |
444 | } | |
445 | ||
446 | static efi_status_t | |
447 | efi_thunk_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm) | |
448 | { | |
449 | efi_status_t status; | |
450 | u32 phys_tm; | |
451 | ||
452 | spin_lock(&rtc_lock); | |
453 | ||
454 | phys_tm = virt_to_phys(tm); | |
455 | ||
456 | status = efi_thunk(set_wakeup_time, enabled, phys_tm); | |
457 | ||
458 | spin_unlock(&rtc_lock); | |
459 | ||
460 | return status; | |
461 | } | |
462 | ||
463 | ||
464 | static efi_status_t | |
465 | efi_thunk_get_variable(efi_char16_t *name, efi_guid_t *vendor, | |
466 | u32 *attr, unsigned long *data_size, void *data) | |
467 | { | |
468 | efi_status_t status; | |
469 | u32 phys_name, phys_vendor, phys_attr; | |
470 | u32 phys_data_size, phys_data; | |
471 | ||
472 | phys_data_size = virt_to_phys(data_size); | |
473 | phys_vendor = virt_to_phys(vendor); | |
474 | phys_name = virt_to_phys(name); | |
475 | phys_attr = virt_to_phys(attr); | |
476 | phys_data = virt_to_phys(data); | |
477 | ||
478 | status = efi_thunk(get_variable, phys_name, phys_vendor, | |
479 | phys_attr, phys_data_size, phys_data); | |
480 | ||
481 | return status; | |
482 | } | |
483 | ||
484 | static efi_status_t | |
485 | efi_thunk_set_variable(efi_char16_t *name, efi_guid_t *vendor, | |
486 | u32 attr, unsigned long data_size, void *data) | |
487 | { | |
488 | u32 phys_name, phys_vendor, phys_data; | |
489 | efi_status_t status; | |
490 | ||
491 | phys_name = virt_to_phys(name); | |
492 | phys_vendor = virt_to_phys(vendor); | |
493 | phys_data = virt_to_phys(data); | |
494 | ||
495 | /* If data_size is > sizeof(u32) we've got problems */ | |
496 | status = efi_thunk(set_variable, phys_name, phys_vendor, | |
497 | attr, data_size, phys_data); | |
498 | ||
499 | return status; | |
500 | } | |
501 | ||
502 | static efi_status_t | |
503 | efi_thunk_get_next_variable(unsigned long *name_size, | |
504 | efi_char16_t *name, | |
505 | efi_guid_t *vendor) | |
506 | { | |
507 | efi_status_t status; | |
508 | u32 phys_name_size, phys_name, phys_vendor; | |
509 | ||
510 | phys_name_size = virt_to_phys(name_size); | |
511 | phys_vendor = virt_to_phys(vendor); | |
512 | phys_name = virt_to_phys(name); | |
513 | ||
514 | status = efi_thunk(get_next_variable, phys_name_size, | |
515 | phys_name, phys_vendor); | |
516 | ||
517 | return status; | |
518 | } | |
519 | ||
520 | static efi_status_t | |
521 | efi_thunk_get_next_high_mono_count(u32 *count) | |
522 | { | |
523 | efi_status_t status; | |
524 | u32 phys_count; | |
525 | ||
526 | phys_count = virt_to_phys(count); | |
527 | status = efi_thunk(get_next_high_mono_count, phys_count); | |
528 | ||
529 | return status; | |
530 | } | |
531 | ||
532 | static void | |
533 | efi_thunk_reset_system(int reset_type, efi_status_t status, | |
534 | unsigned long data_size, efi_char16_t *data) | |
535 | { | |
536 | u32 phys_data; | |
537 | ||
538 | phys_data = virt_to_phys(data); | |
539 | ||
540 | efi_thunk(reset_system, reset_type, status, data_size, phys_data); | |
541 | } | |
542 | ||
543 | static efi_status_t | |
544 | efi_thunk_update_capsule(efi_capsule_header_t **capsules, | |
545 | unsigned long count, unsigned long sg_list) | |
546 | { | |
547 | /* | |
548 | * To properly support this function we would need to repackage | |
549 | * 'capsules' because the firmware doesn't understand 64-bit | |
550 | * pointers. | |
551 | */ | |
552 | return EFI_UNSUPPORTED; | |
553 | } | |
554 | ||
555 | static efi_status_t | |
556 | efi_thunk_query_variable_info(u32 attr, u64 *storage_space, | |
557 | u64 *remaining_space, | |
558 | u64 *max_variable_size) | |
559 | { | |
560 | efi_status_t status; | |
561 | u32 phys_storage, phys_remaining, phys_max; | |
562 | ||
563 | if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION) | |
564 | return EFI_UNSUPPORTED; | |
565 | ||
566 | phys_storage = virt_to_phys(storage_space); | |
567 | phys_remaining = virt_to_phys(remaining_space); | |
568 | phys_max = virt_to_phys(max_variable_size); | |
569 | ||
9a11040f | 570 | status = efi_thunk(query_variable_info, attr, phys_storage, |
4f9dbcfc MF |
571 | phys_remaining, phys_max); |
572 | ||
573 | return status; | |
574 | } | |
575 | ||
576 | static efi_status_t | |
577 | efi_thunk_query_capsule_caps(efi_capsule_header_t **capsules, | |
578 | unsigned long count, u64 *max_size, | |
579 | int *reset_type) | |
580 | { | |
581 | /* | |
582 | * To properly support this function we would need to repackage | |
583 | * 'capsules' because the firmware doesn't understand 64-bit | |
584 | * pointers. | |
585 | */ | |
586 | return EFI_UNSUPPORTED; | |
587 | } | |
588 | ||
589 | void efi_thunk_runtime_setup(void) | |
590 | { | |
591 | efi.get_time = efi_thunk_get_time; | |
592 | efi.set_time = efi_thunk_set_time; | |
593 | efi.get_wakeup_time = efi_thunk_get_wakeup_time; | |
594 | efi.set_wakeup_time = efi_thunk_set_wakeup_time; | |
595 | efi.get_variable = efi_thunk_get_variable; | |
596 | efi.get_next_variable = efi_thunk_get_next_variable; | |
597 | efi.set_variable = efi_thunk_set_variable; | |
598 | efi.get_next_high_mono_count = efi_thunk_get_next_high_mono_count; | |
599 | efi.reset_system = efi_thunk_reset_system; | |
600 | efi.query_variable_info = efi_thunk_query_variable_info; | |
601 | efi.update_capsule = efi_thunk_update_capsule; | |
602 | efi.query_capsule_caps = efi_thunk_query_capsule_caps; | |
603 | } | |
604 | #endif /* CONFIG_EFI_MIXED */ |