diff options
author | Kevin Hilman <khilman@linaro.org> | 2015-10-20 11:26:33 -0700 |
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committer | Kevin Hilman <khilman@linaro.org> | 2015-10-20 11:26:33 -0700 |
commit | 09147a74376428080eddfed0cbce2cab205c2508 (patch) | |
tree | 7c903b82831eb03498dfc89c615e2acd5e1d9d6f /arch/arm64/include/asm/efi.h | |
parent | e4bec9707eb7446e0cd1961f91e6948819327933 (diff) | |
parent | c2fab09b2ec32f252029757ba3353ea3d308c811 (diff) |
Merge branch 'test/linux-linaro-lsk-v3.18-android' of git://android.git.linaro.org/kernel/linaro-android into linux-linaro-lsk-v3.18-androidlsk-v3.18-15.10-android
Diffstat (limited to 'arch/arm64/include/asm/efi.h')
-rw-r--r-- | arch/arm64/include/asm/efi.h | 38 |
1 files changed, 34 insertions, 4 deletions
diff --git a/arch/arm64/include/asm/efi.h b/arch/arm64/include/asm/efi.h index a34fd3b12e2b..7baf2cc04e1e 100644 --- a/arch/arm64/include/asm/efi.h +++ b/arch/arm64/include/asm/efi.h @@ -6,29 +6,35 @@ #ifdef CONFIG_EFI extern void efi_init(void); -extern void efi_idmap_init(void); +extern void efi_virtmap_init(void); #else #define efi_init() -#define efi_idmap_init() +#define efi_virtmap_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 +50,28 @@ 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 three + * 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 early boot, the page tables are allocated and populated based on the + * virt_addr fields in the memory map, but only if all descriptors with the + * EFI_MEMORY_RUNTIME attribute have a non-zero value for virt_addr. If this + * succeeds, the EFI_VIRTMAP flag is set to indicate that the virtual mappings + * have been installed successfully. + * - During an early initcall(), the UEFI Runtime Services are enabled and the + * EFI_RUNTIME_SERVICES bit set if some conditions are met, i.e., we need a + * non-early mapping of the UEFI system table, and we need to have the virtmap + * installed. + */ +#define EFI_VIRTMAP EFI_ARCH_1 + +void efi_virtmap_load(void); +void efi_virtmap_unload(void); + #endif /* _ASM_EFI_H */ |