Commit | Line | Data |
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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 */ |