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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 | |
d2f7cbe7 BP |
44 | /* |
45 | * We allocate runtime services regions bottom-up, starting from -4G, i.e. | |
46 | * 0xffff_ffff_0000_0000 and limit EFI VA mapping space to 64G. | |
47 | */ | |
8266e31e | 48 | static u64 efi_va = EFI_VA_START; |
d2f7cbe7 BP |
49 | |
50 | /* | |
51 | * Scratch space used for switching the pagetable in the EFI stub | |
52 | */ | |
53 | struct efi_scratch { | |
54 | u64 r15; | |
55 | u64 prev_cr3; | |
56 | pgd_t *efi_pgt; | |
57 | bool use_pgd; | |
4f9dbcfc MF |
58 | u64 phys_stack; |
59 | } __packed; | |
d2f7cbe7 | 60 | |
9cd2b07c | 61 | static void __init early_code_mapping_set_exec(int executable) |
5b83683f HY |
62 | { |
63 | efi_memory_desc_t *md; | |
64 | void *p; | |
65 | ||
a2172e25 HY |
66 | if (!(__supported_pte_mask & _PAGE_NX)) |
67 | return; | |
68 | ||
916f676f | 69 | /* Make EFI service code area executable */ |
5b83683f HY |
70 | for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) { |
71 | md = p; | |
916f676f MG |
72 | if (md->type == EFI_RUNTIME_SERVICES_CODE || |
73 | md->type == EFI_BOOT_SERVICES_CODE) | |
9cd2b07c | 74 | efi_set_executable(md, executable); |
5b83683f HY |
75 | } |
76 | } | |
77 | ||
744937b0 | 78 | pgd_t * __init efi_call_phys_prolog(void) |
5b83683f HY |
79 | { |
80 | unsigned long vaddress; | |
744937b0 IM |
81 | pgd_t *save_pgd; |
82 | ||
b8f2c21d NZ |
83 | int pgd; |
84 | int n_pgds; | |
5b83683f | 85 | |
d2f7cbe7 | 86 | if (!efi_enabled(EFI_OLD_MEMMAP)) |
744937b0 | 87 | return NULL; |
d2f7cbe7 | 88 | |
9cd2b07c | 89 | early_code_mapping_set_exec(1); |
b8f2c21d NZ |
90 | |
91 | n_pgds = DIV_ROUND_UP((max_pfn << PAGE_SHIFT), PGDIR_SIZE); | |
92 | save_pgd = kmalloc(n_pgds * sizeof(pgd_t), GFP_KERNEL); | |
93 | ||
94 | for (pgd = 0; pgd < n_pgds; pgd++) { | |
95 | save_pgd[pgd] = *pgd_offset_k(pgd * PGDIR_SIZE); | |
96 | vaddress = (unsigned long)__va(pgd * PGDIR_SIZE); | |
97 | set_pgd(pgd_offset_k(pgd * PGDIR_SIZE), *pgd_offset_k(vaddress)); | |
98 | } | |
5b83683f | 99 | __flush_tlb_all(); |
744937b0 IM |
100 | |
101 | return save_pgd; | |
5b83683f HY |
102 | } |
103 | ||
744937b0 | 104 | void __init efi_call_phys_epilog(pgd_t *save_pgd) |
5b83683f HY |
105 | { |
106 | /* | |
107 | * After the lock is released, the original page table is restored. | |
108 | */ | |
744937b0 IM |
109 | int pgd_idx; |
110 | int nr_pgds; | |
d2f7cbe7 | 111 | |
744937b0 | 112 | if (!save_pgd) |
d2f7cbe7 BP |
113 | return; |
114 | ||
744937b0 IM |
115 | nr_pgds = DIV_ROUND_UP((max_pfn << PAGE_SHIFT) , PGDIR_SIZE); |
116 | ||
117 | for (pgd_idx = 0; pgd_idx < nr_pgds; pgd_idx++) | |
118 | set_pgd(pgd_offset_k(pgd_idx * PGDIR_SIZE), save_pgd[pgd_idx]); | |
119 | ||
b8f2c21d | 120 | kfree(save_pgd); |
744937b0 | 121 | |
5b83683f | 122 | __flush_tlb_all(); |
9cd2b07c | 123 | early_code_mapping_set_exec(0); |
5b83683f | 124 | } |
e1ad783b | 125 | |
d2f7cbe7 BP |
126 | /* |
127 | * Add low kernel mappings for passing arguments to EFI functions. | |
128 | */ | |
129 | void efi_sync_low_kernel_mappings(void) | |
130 | { | |
131 | unsigned num_pgds; | |
132 | pgd_t *pgd = (pgd_t *)__va(real_mode_header->trampoline_pgd); | |
133 | ||
134 | if (efi_enabled(EFI_OLD_MEMMAP)) | |
135 | return; | |
136 | ||
137 | num_pgds = pgd_index(MODULES_END - 1) - pgd_index(PAGE_OFFSET); | |
138 | ||
139 | memcpy(pgd + pgd_index(PAGE_OFFSET), | |
140 | init_mm.pgd + pgd_index(PAGE_OFFSET), | |
141 | sizeof(pgd_t) * num_pgds); | |
142 | } | |
143 | ||
4e78eb05 | 144 | int __init efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages) |
d2f7cbe7 | 145 | { |
4f9dbcfc | 146 | unsigned long text; |
4f9dbcfc | 147 | struct page *page; |
994448f1 | 148 | unsigned npages; |
b7b898ae BP |
149 | pgd_t *pgd; |
150 | ||
151 | if (efi_enabled(EFI_OLD_MEMMAP)) | |
152 | return 0; | |
153 | ||
d2f7cbe7 | 154 | efi_scratch.efi_pgt = (pgd_t *)(unsigned long)real_mode_header->trampoline_pgd; |
b7b898ae | 155 | pgd = __va(efi_scratch.efi_pgt); |
d2f7cbe7 | 156 | |
b7b898ae BP |
157 | /* |
158 | * It can happen that the physical address of new_memmap lands in memory | |
159 | * which is not mapped in the EFI page table. Therefore we need to go | |
160 | * and ident-map those pages containing the map before calling | |
161 | * phys_efi_set_virtual_address_map(). | |
162 | */ | |
163 | if (kernel_map_pages_in_pgd(pgd, pa_memmap, pa_memmap, num_pages, _PAGE_NX)) { | |
164 | pr_err("Error ident-mapping new memmap (0x%lx)!\n", pa_memmap); | |
165 | return 1; | |
166 | } | |
167 | ||
168 | efi_scratch.use_pgd = true; | |
169 | ||
4f9dbcfc MF |
170 | /* |
171 | * When making calls to the firmware everything needs to be 1:1 | |
172 | * mapped and addressable with 32-bit pointers. Map the kernel | |
173 | * text and allocate a new stack because we can't rely on the | |
174 | * stack pointer being < 4GB. | |
175 | */ | |
176 | if (!IS_ENABLED(CONFIG_EFI_MIXED)) | |
994448f1 | 177 | return 0; |
4f9dbcfc MF |
178 | |
179 | page = alloc_page(GFP_KERNEL|__GFP_DMA32); | |
180 | if (!page) | |
181 | panic("Unable to allocate EFI runtime stack < 4GB\n"); | |
182 | ||
183 | efi_scratch.phys_stack = virt_to_phys(page_address(page)); | |
184 | efi_scratch.phys_stack += PAGE_SIZE; /* stack grows down */ | |
185 | ||
186 | npages = (_end - _text) >> PAGE_SHIFT; | |
187 | text = __pa(_text); | |
188 | ||
994448f1 | 189 | if (kernel_map_pages_in_pgd(pgd, text >> PAGE_SHIFT, text, npages, 0)) { |
4f9dbcfc | 190 | pr_err("Failed to map kernel text 1:1\n"); |
994448f1 | 191 | return 1; |
4f9dbcfc | 192 | } |
b7b898ae BP |
193 | |
194 | return 0; | |
195 | } | |
196 | ||
4e78eb05 | 197 | void __init efi_cleanup_page_tables(unsigned long pa_memmap, unsigned num_pages) |
b7b898ae BP |
198 | { |
199 | pgd_t *pgd = (pgd_t *)__va(real_mode_header->trampoline_pgd); | |
200 | ||
201 | kernel_unmap_pages_in_pgd(pgd, pa_memmap, num_pages); | |
d2f7cbe7 BP |
202 | } |
203 | ||
204 | static void __init __map_region(efi_memory_desc_t *md, u64 va) | |
205 | { | |
206 | pgd_t *pgd = (pgd_t *)__va(real_mode_header->trampoline_pgd); | |
2da6e57c | 207 | unsigned long pf = 0; |
d2f7cbe7 BP |
208 | |
209 | if (!(md->attribute & EFI_MEMORY_WB)) | |
210 | pf |= _PAGE_PCD; | |
211 | ||
d2f7cbe7 BP |
212 | if (kernel_map_pages_in_pgd(pgd, md->phys_addr, va, md->num_pages, pf)) |
213 | pr_warn("Error mapping PA 0x%llx -> VA 0x%llx!\n", | |
214 | md->phys_addr, va); | |
215 | } | |
216 | ||
217 | void __init efi_map_region(efi_memory_desc_t *md) | |
218 | { | |
219 | unsigned long size = md->num_pages << PAGE_SHIFT; | |
220 | u64 pa = md->phys_addr; | |
221 | ||
222 | if (efi_enabled(EFI_OLD_MEMMAP)) | |
223 | return old_map_region(md); | |
224 | ||
225 | /* | |
226 | * Make sure the 1:1 mappings are present as a catch-all for b0rked | |
227 | * firmware which doesn't update all internal pointers after switching | |
228 | * to virtual mode and would otherwise crap on us. | |
229 | */ | |
230 | __map_region(md, md->phys_addr); | |
231 | ||
4f9dbcfc MF |
232 | /* |
233 | * Enforce the 1:1 mapping as the default virtual address when | |
234 | * booting in EFI mixed mode, because even though we may be | |
235 | * running a 64-bit kernel, the firmware may only be 32-bit. | |
236 | */ | |
237 | if (!efi_is_native () && IS_ENABLED(CONFIG_EFI_MIXED)) { | |
238 | md->virt_addr = md->phys_addr; | |
239 | return; | |
240 | } | |
241 | ||
d2f7cbe7 BP |
242 | efi_va -= size; |
243 | ||
244 | /* Is PA 2M-aligned? */ | |
245 | if (!(pa & (PMD_SIZE - 1))) { | |
246 | efi_va &= PMD_MASK; | |
247 | } else { | |
248 | u64 pa_offset = pa & (PMD_SIZE - 1); | |
249 | u64 prev_va = efi_va; | |
250 | ||
251 | /* get us the same offset within this 2M page */ | |
252 | efi_va = (efi_va & PMD_MASK) + pa_offset; | |
253 | ||
254 | if (efi_va > prev_va) | |
255 | efi_va -= PMD_SIZE; | |
256 | } | |
257 | ||
258 | if (efi_va < EFI_VA_END) { | |
259 | pr_warn(FW_WARN "VA address range overflow!\n"); | |
260 | return; | |
261 | } | |
262 | ||
263 | /* Do the VA map */ | |
264 | __map_region(md, efi_va); | |
265 | md->virt_addr = efi_va; | |
266 | } | |
267 | ||
3b266496 DY |
268 | /* |
269 | * kexec kernel will use efi_map_region_fixed to map efi runtime memory ranges. | |
270 | * md->virt_addr is the original virtual address which had been mapped in kexec | |
271 | * 1st kernel. | |
272 | */ | |
273 | void __init efi_map_region_fixed(efi_memory_desc_t *md) | |
274 | { | |
275 | __map_region(md, md->virt_addr); | |
276 | } | |
277 | ||
e1ad783b | 278 | void __iomem *__init efi_ioremap(unsigned long phys_addr, unsigned long size, |
3e8fa263 | 279 | u32 type, u64 attribute) |
e1ad783b KP |
280 | { |
281 | unsigned long last_map_pfn; | |
282 | ||
283 | if (type == EFI_MEMORY_MAPPED_IO) | |
284 | return ioremap(phys_addr, size); | |
285 | ||
286 | last_map_pfn = init_memory_mapping(phys_addr, phys_addr + size); | |
287 | if ((last_map_pfn << PAGE_SHIFT) < phys_addr + size) { | |
288 | unsigned long top = last_map_pfn << PAGE_SHIFT; | |
3e8fa263 | 289 | efi_ioremap(top, size - (top - phys_addr), type, attribute); |
e1ad783b KP |
290 | } |
291 | ||
3e8fa263 MF |
292 | if (!(attribute & EFI_MEMORY_WB)) |
293 | efi_memory_uc((u64)(unsigned long)__va(phys_addr), size); | |
294 | ||
e1ad783b KP |
295 | return (void __iomem *)__va(phys_addr); |
296 | } | |
1fec0533 DY |
297 | |
298 | void __init parse_efi_setup(u64 phys_addr, u32 data_len) | |
299 | { | |
300 | efi_setup = phys_addr + sizeof(struct setup_data); | |
1fec0533 | 301 | } |
c55d016f BP |
302 | |
303 | void __init efi_runtime_mkexec(void) | |
304 | { | |
305 | if (!efi_enabled(EFI_OLD_MEMMAP)) | |
306 | return; | |
307 | ||
308 | if (__supported_pte_mask & _PAGE_NX) | |
309 | runtime_code_page_mkexec(); | |
310 | } | |
11cc8512 BP |
311 | |
312 | void __init efi_dump_pagetable(void) | |
313 | { | |
314 | #ifdef CONFIG_EFI_PGT_DUMP | |
315 | pgd_t *pgd = (pgd_t *)__va(real_mode_header->trampoline_pgd); | |
316 | ||
317 | ptdump_walk_pgd_level(NULL, pgd); | |
318 | #endif | |
319 | } | |
994448f1 | 320 | |
4f9dbcfc MF |
321 | #ifdef CONFIG_EFI_MIXED |
322 | extern efi_status_t efi64_thunk(u32, ...); | |
323 | ||
324 | #define runtime_service32(func) \ | |
325 | ({ \ | |
326 | u32 table = (u32)(unsigned long)efi.systab; \ | |
327 | u32 *rt, *___f; \ | |
328 | \ | |
329 | rt = (u32 *)(table + offsetof(efi_system_table_32_t, runtime)); \ | |
330 | ___f = (u32 *)(*rt + offsetof(efi_runtime_services_32_t, func)); \ | |
331 | *___f; \ | |
332 | }) | |
333 | ||
334 | /* | |
335 | * Switch to the EFI page tables early so that we can access the 1:1 | |
336 | * runtime services mappings which are not mapped in any other page | |
337 | * tables. This function must be called before runtime_service32(). | |
338 | * | |
339 | * Also, disable interrupts because the IDT points to 64-bit handlers, | |
340 | * which aren't going to function correctly when we switch to 32-bit. | |
341 | */ | |
342 | #define efi_thunk(f, ...) \ | |
343 | ({ \ | |
344 | efi_status_t __s; \ | |
345 | unsigned long flags; \ | |
346 | u32 func; \ | |
347 | \ | |
348 | efi_sync_low_kernel_mappings(); \ | |
349 | local_irq_save(flags); \ | |
350 | \ | |
351 | efi_scratch.prev_cr3 = read_cr3(); \ | |
352 | write_cr3((unsigned long)efi_scratch.efi_pgt); \ | |
353 | __flush_tlb_all(); \ | |
354 | \ | |
355 | func = runtime_service32(f); \ | |
356 | __s = efi64_thunk(func, __VA_ARGS__); \ | |
357 | \ | |
358 | write_cr3(efi_scratch.prev_cr3); \ | |
359 | __flush_tlb_all(); \ | |
360 | local_irq_restore(flags); \ | |
361 | \ | |
362 | __s; \ | |
363 | }) | |
364 | ||
365 | efi_status_t efi_thunk_set_virtual_address_map( | |
366 | void *phys_set_virtual_address_map, | |
367 | unsigned long memory_map_size, | |
368 | unsigned long descriptor_size, | |
369 | u32 descriptor_version, | |
370 | efi_memory_desc_t *virtual_map) | |
371 | { | |
372 | efi_status_t status; | |
373 | unsigned long flags; | |
374 | u32 func; | |
375 | ||
376 | efi_sync_low_kernel_mappings(); | |
377 | local_irq_save(flags); | |
378 | ||
379 | efi_scratch.prev_cr3 = read_cr3(); | |
380 | write_cr3((unsigned long)efi_scratch.efi_pgt); | |
381 | __flush_tlb_all(); | |
382 | ||
383 | func = (u32)(unsigned long)phys_set_virtual_address_map; | |
384 | status = efi64_thunk(func, memory_map_size, descriptor_size, | |
385 | descriptor_version, virtual_map); | |
386 | ||
387 | write_cr3(efi_scratch.prev_cr3); | |
388 | __flush_tlb_all(); | |
389 | local_irq_restore(flags); | |
390 | ||
391 | return status; | |
392 | } | |
393 | ||
394 | static efi_status_t efi_thunk_get_time(efi_time_t *tm, efi_time_cap_t *tc) | |
395 | { | |
396 | efi_status_t status; | |
397 | u32 phys_tm, phys_tc; | |
398 | ||
399 | spin_lock(&rtc_lock); | |
400 | ||
401 | phys_tm = virt_to_phys(tm); | |
402 | phys_tc = virt_to_phys(tc); | |
403 | ||
404 | status = efi_thunk(get_time, phys_tm, phys_tc); | |
405 | ||
406 | spin_unlock(&rtc_lock); | |
407 | ||
408 | return status; | |
409 | } | |
410 | ||
411 | static efi_status_t efi_thunk_set_time(efi_time_t *tm) | |
412 | { | |
413 | efi_status_t status; | |
414 | u32 phys_tm; | |
415 | ||
416 | spin_lock(&rtc_lock); | |
417 | ||
418 | phys_tm = virt_to_phys(tm); | |
419 | ||
420 | status = efi_thunk(set_time, phys_tm); | |
421 | ||
422 | spin_unlock(&rtc_lock); | |
423 | ||
424 | return status; | |
425 | } | |
426 | ||
427 | static efi_status_t | |
428 | efi_thunk_get_wakeup_time(efi_bool_t *enabled, efi_bool_t *pending, | |
429 | efi_time_t *tm) | |
430 | { | |
431 | efi_status_t status; | |
432 | u32 phys_enabled, phys_pending, phys_tm; | |
433 | ||
434 | spin_lock(&rtc_lock); | |
435 | ||
436 | phys_enabled = virt_to_phys(enabled); | |
437 | phys_pending = virt_to_phys(pending); | |
438 | phys_tm = virt_to_phys(tm); | |
439 | ||
440 | status = efi_thunk(get_wakeup_time, phys_enabled, | |
441 | phys_pending, phys_tm); | |
442 | ||
443 | spin_unlock(&rtc_lock); | |
444 | ||
445 | return status; | |
446 | } | |
447 | ||
448 | static efi_status_t | |
449 | efi_thunk_set_wakeup_time(efi_bool_t enabled, efi_time_t *tm) | |
450 | { | |
451 | efi_status_t status; | |
452 | u32 phys_tm; | |
453 | ||
454 | spin_lock(&rtc_lock); | |
455 | ||
456 | phys_tm = virt_to_phys(tm); | |
457 | ||
458 | status = efi_thunk(set_wakeup_time, enabled, phys_tm); | |
459 | ||
460 | spin_unlock(&rtc_lock); | |
461 | ||
462 | return status; | |
463 | } | |
464 | ||
465 | ||
466 | static efi_status_t | |
467 | efi_thunk_get_variable(efi_char16_t *name, efi_guid_t *vendor, | |
468 | u32 *attr, unsigned long *data_size, void *data) | |
469 | { | |
470 | efi_status_t status; | |
471 | u32 phys_name, phys_vendor, phys_attr; | |
472 | u32 phys_data_size, phys_data; | |
473 | ||
474 | phys_data_size = virt_to_phys(data_size); | |
475 | phys_vendor = virt_to_phys(vendor); | |
476 | phys_name = virt_to_phys(name); | |
477 | phys_attr = virt_to_phys(attr); | |
478 | phys_data = virt_to_phys(data); | |
479 | ||
480 | status = efi_thunk(get_variable, phys_name, phys_vendor, | |
481 | phys_attr, phys_data_size, phys_data); | |
482 | ||
483 | return status; | |
484 | } | |
485 | ||
486 | static efi_status_t | |
487 | efi_thunk_set_variable(efi_char16_t *name, efi_guid_t *vendor, | |
488 | u32 attr, unsigned long data_size, void *data) | |
489 | { | |
490 | u32 phys_name, phys_vendor, phys_data; | |
491 | efi_status_t status; | |
492 | ||
493 | phys_name = virt_to_phys(name); | |
494 | phys_vendor = virt_to_phys(vendor); | |
495 | phys_data = virt_to_phys(data); | |
496 | ||
497 | /* If data_size is > sizeof(u32) we've got problems */ | |
498 | status = efi_thunk(set_variable, phys_name, phys_vendor, | |
499 | attr, data_size, phys_data); | |
500 | ||
501 | return status; | |
502 | } | |
503 | ||
504 | static efi_status_t | |
505 | efi_thunk_get_next_variable(unsigned long *name_size, | |
506 | efi_char16_t *name, | |
507 | efi_guid_t *vendor) | |
508 | { | |
509 | efi_status_t status; | |
510 | u32 phys_name_size, phys_name, phys_vendor; | |
511 | ||
512 | phys_name_size = virt_to_phys(name_size); | |
513 | phys_vendor = virt_to_phys(vendor); | |
514 | phys_name = virt_to_phys(name); | |
515 | ||
516 | status = efi_thunk(get_next_variable, phys_name_size, | |
517 | phys_name, phys_vendor); | |
518 | ||
519 | return status; | |
520 | } | |
521 | ||
522 | static efi_status_t | |
523 | efi_thunk_get_next_high_mono_count(u32 *count) | |
524 | { | |
525 | efi_status_t status; | |
526 | u32 phys_count; | |
527 | ||
528 | phys_count = virt_to_phys(count); | |
529 | status = efi_thunk(get_next_high_mono_count, phys_count); | |
530 | ||
531 | return status; | |
532 | } | |
533 | ||
534 | static void | |
535 | efi_thunk_reset_system(int reset_type, efi_status_t status, | |
536 | unsigned long data_size, efi_char16_t *data) | |
537 | { | |
538 | u32 phys_data; | |
539 | ||
540 | phys_data = virt_to_phys(data); | |
541 | ||
542 | efi_thunk(reset_system, reset_type, status, data_size, phys_data); | |
543 | } | |
544 | ||
545 | static efi_status_t | |
546 | efi_thunk_update_capsule(efi_capsule_header_t **capsules, | |
547 | unsigned long count, unsigned long sg_list) | |
548 | { | |
549 | /* | |
550 | * To properly support this function we would need to repackage | |
551 | * 'capsules' because the firmware doesn't understand 64-bit | |
552 | * pointers. | |
553 | */ | |
554 | return EFI_UNSUPPORTED; | |
555 | } | |
556 | ||
557 | static efi_status_t | |
558 | efi_thunk_query_variable_info(u32 attr, u64 *storage_space, | |
559 | u64 *remaining_space, | |
560 | u64 *max_variable_size) | |
561 | { | |
562 | efi_status_t status; | |
563 | u32 phys_storage, phys_remaining, phys_max; | |
564 | ||
565 | if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION) | |
566 | return EFI_UNSUPPORTED; | |
567 | ||
568 | phys_storage = virt_to_phys(storage_space); | |
569 | phys_remaining = virt_to_phys(remaining_space); | |
570 | phys_max = virt_to_phys(max_variable_size); | |
571 | ||
9a11040f | 572 | status = efi_thunk(query_variable_info, attr, phys_storage, |
4f9dbcfc MF |
573 | phys_remaining, phys_max); |
574 | ||
575 | return status; | |
576 | } | |
577 | ||
578 | static efi_status_t | |
579 | efi_thunk_query_capsule_caps(efi_capsule_header_t **capsules, | |
580 | unsigned long count, u64 *max_size, | |
581 | int *reset_type) | |
582 | { | |
583 | /* | |
584 | * To properly support this function we would need to repackage | |
585 | * 'capsules' because the firmware doesn't understand 64-bit | |
586 | * pointers. | |
587 | */ | |
588 | return EFI_UNSUPPORTED; | |
589 | } | |
590 | ||
591 | void efi_thunk_runtime_setup(void) | |
592 | { | |
593 | efi.get_time = efi_thunk_get_time; | |
594 | efi.set_time = efi_thunk_set_time; | |
595 | efi.get_wakeup_time = efi_thunk_get_wakeup_time; | |
596 | efi.set_wakeup_time = efi_thunk_set_wakeup_time; | |
597 | efi.get_variable = efi_thunk_get_variable; | |
598 | efi.get_next_variable = efi_thunk_get_next_variable; | |
599 | efi.set_variable = efi_thunk_set_variable; | |
600 | efi.get_next_high_mono_count = efi_thunk_get_next_high_mono_count; | |
601 | efi.reset_system = efi_thunk_reset_system; | |
602 | efi.query_variable_info = efi_thunk_query_variable_info; | |
603 | efi.update_capsule = efi_thunk_update_capsule; | |
604 | efi.query_capsule_caps = efi_thunk_query_capsule_caps; | |
605 | } | |
606 | #endif /* CONFIG_EFI_MIXED */ |