projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| f84d0275 MS |
1 | #ifndef _ASM_EFI_H |
| 2 | #define _ASM_EFI_H | |
| 3 | ||
| 4 | #include <asm/io.h> | |
| f7d92489 | 5 | #include <asm/mmu_context.h> |
| e15dd494 | 6 | #include <asm/neon.h> |
| f7d92489 | 7 | #include <asm/tlbflush.h> |
| f84d0275 MS |
8 | |
| 9 | #ifdef CONFIG_EFI | |
| 10 | extern void efi_init(void); | |
| f84d0275 MS |
11 | #else |
| 12 | #define efi_init() | |
| f84d0275 MS |
13 | #endif |
| 14 | ||
| f7d92489 AB |
15 | int efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md); |
| 16 | ||
| e15dd494 AB |
17 | #define efi_call_virt(f, ...) \ |
| 18 | ({ \ | |
| f3cdfd23 | 19 | efi_##f##_t *__f; \ |
| e15dd494 AB |
20 | efi_status_t __s; \ |
| 21 | \ | |
| 22 | kernel_neon_begin(); \ | |
| f3cdfd23 AB |
23 | efi_virtmap_load(); \ |
| 24 | __f = efi.systab->runtime->f; \ | |
| e15dd494 | 25 | __s = __f(__VA_ARGS__); \ |
| f3cdfd23 | 26 | efi_virtmap_unload(); \ |
| e15dd494 AB |
27 | kernel_neon_end(); \ |
| 28 | __s; \ | |
| 29 | }) | |
| 30 | ||
| 31 | #define __efi_call_virt(f, ...) \ | |
| 32 | ({ \ | |
| f3cdfd23 | 33 | efi_##f##_t *__f; \ |
| e15dd494 AB |
34 | \ |
| 35 | kernel_neon_begin(); \ | |
| f3cdfd23 AB |
36 | efi_virtmap_load(); \ |
| 37 | __f = efi.systab->runtime->f; \ | |
| e15dd494 | 38 | __f(__VA_ARGS__); \ |
| f3cdfd23 | 39 | efi_virtmap_unload(); \ |
| e15dd494 AB |
40 | kernel_neon_end(); \ |
| 41 | }) | |
| 42 | ||
| a13b0077 AB |
43 | /* arch specific definitions used by the stub code */ |
| 44 | ||
| 45 | /* | |
| 46 | * AArch64 requires the DTB to be 8-byte aligned in the first 512MiB from | |
| 47 | * start of kernel and may not cross a 2MiB boundary. We set alignment to | |
| 48 | * 2MiB so we know it won't cross a 2MiB boundary. | |
| 49 | */ | |
| 50 | #define EFI_FDT_ALIGN SZ_2M /* used by allocate_new_fdt_and_exit_boot() */ | |
| 51 | #define MAX_FDT_OFFSET SZ_512M | |
| 52 | ||
| 53 | #define efi_call_early(f, ...) sys_table_arg->boottime->f(__VA_ARGS__) | |
| 54 | ||
| 1bd0abb0 AB |
55 | #define EFI_ALLOC_ALIGN SZ_64K |
| 56 | ||
| f3cdfd23 | 57 | /* |
| 60305db9 | 58 | * On ARM systems, virtually remapped UEFI runtime services are set up in two |
| f3cdfd23 AB |
59 | * distinct stages: |
| 60 | * - The stub retrieves the final version of the memory map from UEFI, populates | |
| 61 | * the virt_addr fields and calls the SetVirtualAddressMap() [SVAM] runtime | |
| 62 | * service to communicate the new mapping to the firmware (Note that the new | |
| 63 | * mapping is not live at this time) | |
| 60305db9 AB |
64 | * - During an early initcall(), the EFI system table is permanently remapped |
| 65 | * and the virtual remapping of the UEFI Runtime Services regions is loaded | |
| 66 | * into a private set of page tables. If this all succeeds, the Runtime | |
| 67 | * Services are enabled and the EFI_RUNTIME_SERVICES bit set. | |
| f3cdfd23 | 68 | */ |
| f3cdfd23 | 69 | |
| f7d92489 AB |
70 | static inline void efi_set_pgd(struct mm_struct *mm) |
| 71 | { | |
| 72 | switch_mm(NULL, mm, NULL); | |
| 73 | } | |
| 74 | ||
| f3cdfd23 AB |
75 | void efi_virtmap_load(void); |
| 76 | void efi_virtmap_unload(void); | |
| 77 | ||
| f84d0275 | 78 | #endif /* _ASM_EFI_H */ |