diff options
Diffstat (limited to 'arch/arm64/include/asm/efi.h')
| -rw-r--r-- | arch/arm64/include/asm/efi.h | 30 |
1 files changed, 26 insertions, 4 deletions
diff --git a/arch/arm64/include/asm/efi.h b/arch/arm64/include/asm/efi.h index a34fd3b12e2b..ef572206f1c3 100644 --- a/arch/arm64/include/asm/efi.h +++ b/arch/arm64/include/asm/efi.h @@ -6,29 +6,33 @@ #ifdef CONFIG_EFI extern void efi_init(void); -extern void efi_idmap_init(void); #else #define efi_init() -#define efi_idmap_init() #endif #define efi_call_virt(f, ...) \ ({ \ - efi_##f##_t *__f = efi.systab->runtime->f; \ + efi_##f##_t *__f; \ efi_status_t __s; \ \ kernel_neon_begin(); \ + efi_virtmap_load(); \ + __f = efi.systab->runtime->f; \ __s = __f(__VA_ARGS__); \ + efi_virtmap_unload(); \ kernel_neon_end(); \ __s; \ }) #define __efi_call_virt(f, ...) \ ({ \ - efi_##f##_t *__f = efi.systab->runtime->f; \ + efi_##f##_t *__f; \ \ kernel_neon_begin(); \ + efi_virtmap_load(); \ + __f = efi.systab->runtime->f; \ __f(__VA_ARGS__); \ + efi_virtmap_unload(); \ kernel_neon_end(); \ }) @@ -44,4 +48,22 @@ extern void efi_idmap_init(void); #define efi_call_early(f, ...) sys_table_arg->boottime->f(__VA_ARGS__) +#define EFI_ALLOC_ALIGN SZ_64K + +/* + * On ARM systems, virtually remapped UEFI runtime services are set up in two + * distinct stages: + * - The stub retrieves the final version of the memory map from UEFI, populates + * the virt_addr fields and calls the SetVirtualAddressMap() [SVAM] runtime + * service to communicate the new mapping to the firmware (Note that the new + * mapping is not live at this time) + * - During an early initcall(), the EFI system table is permanently remapped + * and the virtual remapping of the UEFI Runtime Services regions is loaded + * into a private set of page tables. If this all succeeds, the Runtime + * Services are enabled and the EFI_RUNTIME_SERVICES bit set. + */ + +void efi_virtmap_load(void); +void efi_virtmap_unload(void); + #endif /* _ASM_EFI_H */ |