| | 1 | #ifndef _ASM_EFI_H |
| | 2 | #define _ASM_EFI_H |
| | 3 | |
| | 4 | #include <asm/io.h> |
| | 5 | #include <asm/mmu_context.h> |
| | 6 | #include <asm/neon.h> |
| | 7 | #include <asm/tlbflush.h> |
| | 8 | |
| | 9 | #ifdef CONFIG_EFI |
| | 10 | extern void efi_init(void); |
| | 11 | #else |
| | 12 | #define efi_init() |
| | 13 | #endif |
| | 14 | |
| | 15 | int efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md); |
| | 16 | |
| | 17 | #define efi_set_mapping_permissions efi_create_mapping |
| | 18 | |
| | 19 | #define efi_call_virt(f, ...) \ |
| | 20 | ({ \ |
| | 21 | efi_##f##_t *__f; \ |
| | 22 | efi_status_t __s; \ |
| | 23 | \ |
| | 24 | kernel_neon_begin(); \ |
| | 25 | efi_virtmap_load(); \ |
| | 26 | __f = efi.systab->runtime->f; \ |
| | 27 | __s = __f(__VA_ARGS__); \ |
| | 28 | efi_virtmap_unload(); \ |
| | 29 | kernel_neon_end(); \ |
| | 30 | __s; \ |
| | 31 | }) |
| | 32 | |
| | 33 | #define __efi_call_virt(f, ...) \ |
| | 34 | ({ \ |
| | 35 | efi_##f##_t *__f; \ |
| | 36 | \ |
| | 37 | kernel_neon_begin(); \ |
| | 38 | efi_virtmap_load(); \ |
| | 39 | __f = efi.systab->runtime->f; \ |
| | 40 | __f(__VA_ARGS__); \ |
| | 41 | efi_virtmap_unload(); \ |
| | 42 | kernel_neon_end(); \ |
| | 43 | }) |
| | 44 | |
| | 45 | /* arch specific definitions used by the stub code */ |
| | 46 | |
| | 47 | /* |
| | 48 | * AArch64 requires the DTB to be 8-byte aligned in the first 512MiB from |
| | 49 | * start of kernel and may not cross a 2MiB boundary. We set alignment to |
| | 50 | * 2MiB so we know it won't cross a 2MiB boundary. |
| | 51 | */ |
| | 52 | #define EFI_FDT_ALIGN SZ_2M /* used by allocate_new_fdt_and_exit_boot() */ |
| | 53 | #define MAX_FDT_OFFSET SZ_512M |
| | 54 | |
| | 55 | #define efi_call_early(f, ...) sys_table_arg->boottime->f(__VA_ARGS__) |
| | 56 | #define __efi_call_early(f, ...) f(__VA_ARGS__) |
| | 57 | #define efi_is_64bit() (true) |
| | 58 | |
| | 59 | #define EFI_ALLOC_ALIGN SZ_64K |
| | 60 | |
| | 61 | /* |
| | 62 | * On ARM systems, virtually remapped UEFI runtime services are set up in two |
| | 63 | * distinct stages: |
| | 64 | * - The stub retrieves the final version of the memory map from UEFI, populates |
| | 65 | * the virt_addr fields and calls the SetVirtualAddressMap() [SVAM] runtime |
| | 66 | * service to communicate the new mapping to the firmware (Note that the new |
| | 67 | * mapping is not live at this time) |
| | 68 | * - During an early initcall(), the EFI system table is permanently remapped |
| | 69 | * and the virtual remapping of the UEFI Runtime Services regions is loaded |
| | 70 | * into a private set of page tables. If this all succeeds, the Runtime |
| | 71 | * Services are enabled and the EFI_RUNTIME_SERVICES bit set. |
| | 72 | */ |
| | 73 | |
| | 74 | static inline void efi_set_pgd(struct mm_struct *mm) |
| | 75 | { |
| | 76 | switch_mm(NULL, mm, NULL); |
| | 77 | } |
| | 78 | |
| | 79 | void efi_virtmap_load(void); |
| | 80 | void efi_virtmap_unload(void); |
| | 81 | |
| | 82 | #endif /* _ASM_EFI_H */ |
projects / mirror_ubuntu-bionic-kernel.git / blame_incremental