Commit | Line | Data |
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da58fb65 AB |
1 | /* |
2 | * Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | */ | |
8 | ||
9 | #include <linux/efi.h> | |
10 | #include <asm/efi.h> | |
11 | #include <asm/mach/map.h> | |
12 | #include <asm/mmu_context.h> | |
13 | ||
14 | int __init efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md) | |
15 | { | |
16 | struct map_desc desc = { | |
17 | .virtual = md->virt_addr, | |
18 | .pfn = __phys_to_pfn(md->phys_addr), | |
19 | .length = md->num_pages * EFI_PAGE_SIZE, | |
20 | }; | |
21 | ||
22 | /* | |
23 | * Order is important here: memory regions may have all of the | |
24 | * bits below set (and usually do), so we check them in order of | |
25 | * preference. | |
26 | */ | |
27 | if (md->attribute & EFI_MEMORY_WB) | |
28 | desc.type = MT_MEMORY_RWX; | |
29 | else if (md->attribute & EFI_MEMORY_WT) | |
30 | desc.type = MT_MEMORY_RWX_NONCACHED; | |
31 | else if (md->attribute & EFI_MEMORY_WC) | |
32 | desc.type = MT_DEVICE_WC; | |
33 | else | |
34 | desc.type = MT_DEVICE; | |
35 | ||
36 | create_mapping_late(mm, &desc, true); | |
37 | return 0; | |
38 | } |