Mark Salter | f84d027 | 2014-04-15 21:59:30 -0400 | [diff] [blame] | 1 | #ifndef _ASM_EFI_H |
| 2 | #define _ASM_EFI_H |
| 3 | |
| 4 | #include <asm/io.h> |
Ard Biesheuvel | f7d9248 | 2015-11-30 13:28:19 +0100 | [diff] [blame] | 5 | #include <asm/mmu_context.h> |
Ard Biesheuvel | e15dd49 | 2014-07-04 19:41:53 +0200 | [diff] [blame] | 6 | #include <asm/neon.h> |
Ard Biesheuvel | f7d9248 | 2015-11-30 13:28:19 +0100 | [diff] [blame] | 7 | #include <asm/tlbflush.h> |
Mark Salter | f84d027 | 2014-04-15 21:59:30 -0400 | [diff] [blame] | 8 | |
| 9 | #ifdef CONFIG_EFI |
| 10 | extern void efi_init(void); |
Mark Salter | f84d027 | 2014-04-15 21:59:30 -0400 | [diff] [blame] | 11 | #else |
| 12 | #define efi_init() |
Mark Salter | f84d027 | 2014-04-15 21:59:30 -0400 | [diff] [blame] | 13 | #endif |
| 14 | |
Ard Biesheuvel | f7d9248 | 2015-11-30 13:28:19 +0100 | [diff] [blame] | 15 | int efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md); |
| 16 | |
Ard Biesheuvel | e15dd49 | 2014-07-04 19:41:53 +0200 | [diff] [blame] | 17 | #define efi_call_virt(f, ...) \ |
| 18 | ({ \ |
Ard Biesheuvel | f3cdfd2 | 2014-10-20 16:27:26 +0200 | [diff] [blame] | 19 | efi_##f##_t *__f; \ |
Ard Biesheuvel | e15dd49 | 2014-07-04 19:41:53 +0200 | [diff] [blame] | 20 | efi_status_t __s; \ |
| 21 | \ |
| 22 | kernel_neon_begin(); \ |
Ard Biesheuvel | f3cdfd2 | 2014-10-20 16:27:26 +0200 | [diff] [blame] | 23 | efi_virtmap_load(); \ |
| 24 | __f = efi.systab->runtime->f; \ |
Ard Biesheuvel | e15dd49 | 2014-07-04 19:41:53 +0200 | [diff] [blame] | 25 | __s = __f(__VA_ARGS__); \ |
Ard Biesheuvel | f3cdfd2 | 2014-10-20 16:27:26 +0200 | [diff] [blame] | 26 | efi_virtmap_unload(); \ |
Ard Biesheuvel | e15dd49 | 2014-07-04 19:41:53 +0200 | [diff] [blame] | 27 | kernel_neon_end(); \ |
| 28 | __s; \ |
| 29 | }) |
| 30 | |
| 31 | #define __efi_call_virt(f, ...) \ |
| 32 | ({ \ |
Ard Biesheuvel | f3cdfd2 | 2014-10-20 16:27:26 +0200 | [diff] [blame] | 33 | efi_##f##_t *__f; \ |
Ard Biesheuvel | e15dd49 | 2014-07-04 19:41:53 +0200 | [diff] [blame] | 34 | \ |
| 35 | kernel_neon_begin(); \ |
Ard Biesheuvel | f3cdfd2 | 2014-10-20 16:27:26 +0200 | [diff] [blame] | 36 | efi_virtmap_load(); \ |
| 37 | __f = efi.systab->runtime->f; \ |
Ard Biesheuvel | e15dd49 | 2014-07-04 19:41:53 +0200 | [diff] [blame] | 38 | __f(__VA_ARGS__); \ |
Ard Biesheuvel | f3cdfd2 | 2014-10-20 16:27:26 +0200 | [diff] [blame] | 39 | efi_virtmap_unload(); \ |
Ard Biesheuvel | e15dd49 | 2014-07-04 19:41:53 +0200 | [diff] [blame] | 40 | kernel_neon_end(); \ |
| 41 | }) |
| 42 | |
Ard Biesheuvel | a13b007 | 2014-07-02 14:54:41 +0200 | [diff] [blame] | 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 | |
Ard Biesheuvel | 1bd0abb | 2014-11-17 13:50:21 +0100 | [diff] [blame] | 55 | #define EFI_ALLOC_ALIGN SZ_64K |
| 56 | |
Ard Biesheuvel | f3cdfd2 | 2014-10-20 16:27:26 +0200 | [diff] [blame] | 57 | /* |
Ard Biesheuvel | 60305db9 | 2015-01-22 10:01:40 +0000 | [diff] [blame] | 58 | * On ARM systems, virtually remapped UEFI runtime services are set up in two |
Ard Biesheuvel | f3cdfd2 | 2014-10-20 16:27:26 +0200 | [diff] [blame] | 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) |
Ard Biesheuvel | 60305db9 | 2015-01-22 10:01:40 +0000 | [diff] [blame] | 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. |
Ard Biesheuvel | f3cdfd2 | 2014-10-20 16:27:26 +0200 | [diff] [blame] | 68 | */ |
Ard Biesheuvel | f3cdfd2 | 2014-10-20 16:27:26 +0200 | [diff] [blame] | 69 | |
Ard Biesheuvel | f7d9248 | 2015-11-30 13:28:19 +0100 | [diff] [blame] | 70 | static inline void efi_set_pgd(struct mm_struct *mm) |
| 71 | { |
| 72 | switch_mm(NULL, mm, NULL); |
| 73 | } |
| 74 | |
Ard Biesheuvel | f3cdfd2 | 2014-10-20 16:27:26 +0200 | [diff] [blame] | 75 | void efi_virtmap_load(void); |
| 76 | void efi_virtmap_unload(void); |
| 77 | |
Mark Salter | f84d027 | 2014-04-15 21:59:30 -0400 | [diff] [blame] | 78 | #endif /* _ASM_EFI_H */ |