| /* |
| * Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| #include <linux/efi.h> |
| #include <asm/efi.h> |
| #include <asm/mach/map.h> |
| #include <asm/mmu_context.h> |
| |
| int __init efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md) |
| { |
| struct map_desc desc = { |
| .virtual = md->virt_addr, |
| .pfn = __phys_to_pfn(md->phys_addr), |
| .length = md->num_pages * EFI_PAGE_SIZE, |
| }; |
| |
| /* |
| * Order is important here: memory regions may have all of the |
| * bits below set (and usually do), so we check them in order of |
| * preference. |
| */ |
| if (md->attribute & EFI_MEMORY_WB) |
| desc.type = MT_MEMORY_RWX; |
| else if (md->attribute & EFI_MEMORY_WT) |
| desc.type = MT_MEMORY_RWX_NONCACHED; |
| else if (md->attribute & EFI_MEMORY_WC) |
| desc.type = MT_DEVICE_WC; |
| else |
| desc.type = MT_DEVICE; |
| |
| create_mapping_late(mm, &desc, true); |
| return 0; |
| } |