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> |
Mark Rutland | ee6cab5 | 2016-04-25 21:07:09 +0100 | [diff] [blame] | 7 | #include <asm/ptrace.h> |
Ard Biesheuvel | f7d9248 | 2015-11-30 13:28:19 +0100 | [diff] [blame] | 8 | #include <asm/tlbflush.h> |
Mark Salter | f84d027 | 2014-04-15 21:59:30 -0400 | [diff] [blame] | 9 | |
| 10 | #ifdef CONFIG_EFI |
| 11 | extern void efi_init(void); |
Mark Salter | f84d027 | 2014-04-15 21:59:30 -0400 | [diff] [blame] | 12 | #else |
| 13 | #define efi_init() |
Mark Salter | f84d027 | 2014-04-15 21:59:30 -0400 | [diff] [blame] | 14 | #endif |
| 15 | |
Ard Biesheuvel | f7d9248 | 2015-11-30 13:28:19 +0100 | [diff] [blame] | 16 | int efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md); |
Ard Biesheuvel | bd264d0 | 2016-06-29 14:51:27 +0200 | [diff] [blame] | 17 | int efi_set_mapping_permissions(struct mm_struct *mm, efi_memory_desc_t *md); |
Ard Biesheuvel | 789957e | 2016-04-25 21:06:46 +0100 | [diff] [blame] | 18 | |
Mark Rutland | 489f80f | 2016-04-25 21:07:04 +0100 | [diff] [blame] | 19 | #define arch_efi_call_virt_setup() \ |
Ard Biesheuvel | e15dd49 | 2014-07-04 19:41:53 +0200 | [diff] [blame] | 20 | ({ \ |
Ard Biesheuvel | e15dd49 | 2014-07-04 19:41:53 +0200 | [diff] [blame] | 21 | kernel_neon_begin(); \ |
Ard Biesheuvel | f3cdfd2 | 2014-10-20 16:27:26 +0200 | [diff] [blame] | 22 | efi_virtmap_load(); \ |
Ard Biesheuvel | e15dd49 | 2014-07-04 19:41:53 +0200 | [diff] [blame] | 23 | }) |
| 24 | |
Alex Thorlton | 80e7559 | 2016-06-25 08:20:27 +0100 | [diff] [blame] | 25 | #define arch_efi_call_virt(p, f, args...) \ |
Ard Biesheuvel | e15dd49 | 2014-07-04 19:41:53 +0200 | [diff] [blame] | 26 | ({ \ |
Ard Biesheuvel | f3cdfd2 | 2014-10-20 16:27:26 +0200 | [diff] [blame] | 27 | efi_##f##_t *__f; \ |
Alex Thorlton | 80e7559 | 2016-06-25 08:20:27 +0100 | [diff] [blame] | 28 | __f = p->f; \ |
Mark Rutland | 489f80f | 2016-04-25 21:07:04 +0100 | [diff] [blame] | 29 | __f(args); \ |
| 30 | }) |
| 31 | |
| 32 | #define arch_efi_call_virt_teardown() \ |
| 33 | ({ \ |
Ard Biesheuvel | f3cdfd2 | 2014-10-20 16:27:26 +0200 | [diff] [blame] | 34 | efi_virtmap_unload(); \ |
Ard Biesheuvel | e15dd49 | 2014-07-04 19:41:53 +0200 | [diff] [blame] | 35 | kernel_neon_end(); \ |
| 36 | }) |
| 37 | |
Mark Rutland | ee6cab5 | 2016-04-25 21:07:09 +0100 | [diff] [blame] | 38 | #define ARCH_EFI_IRQ_FLAGS_MASK (PSR_D_BIT | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT) |
| 39 | |
Ard Biesheuvel | a13b007 | 2014-07-02 14:54:41 +0200 | [diff] [blame] | 40 | /* arch specific definitions used by the stub code */ |
| 41 | |
| 42 | /* |
| 43 | * AArch64 requires the DTB to be 8-byte aligned in the first 512MiB from |
| 44 | * start of kernel and may not cross a 2MiB boundary. We set alignment to |
| 45 | * 2MiB so we know it won't cross a 2MiB boundary. |
| 46 | */ |
| 47 | #define EFI_FDT_ALIGN SZ_2M /* used by allocate_new_fdt_and_exit_boot() */ |
| 48 | #define MAX_FDT_OFFSET SZ_512M |
| 49 | |
Ard Biesheuvel | fc37206 | 2016-04-25 21:06:49 +0100 | [diff] [blame] | 50 | #define efi_call_early(f, ...) sys_table_arg->boottime->f(__VA_ARGS__) |
| 51 | #define __efi_call_early(f, ...) f(__VA_ARGS__) |
| 52 | #define efi_is_64bit() (true) |
Ard Biesheuvel | a13b007 | 2014-07-02 14:54:41 +0200 | [diff] [blame] | 53 | |
Ard Biesheuvel | 57fdb89a | 2016-04-25 21:06:52 +0100 | [diff] [blame] | 54 | #define alloc_screen_info(x...) &screen_info |
| 55 | #define free_screen_info(x...) |
| 56 | |
Ard Biesheuvel | 61d920c | 2017-08-18 20:49:35 +0100 | [diff] [blame] | 57 | /* redeclare as 'hidden' so the compiler will generate relative references */ |
| 58 | extern struct screen_info screen_info __attribute__((__visibility__("hidden"))); |
| 59 | |
Ard Biesheuvel | 9822504 | 2016-04-25 21:06:56 +0100 | [diff] [blame] | 60 | static inline void efifb_setup_from_dmi(struct screen_info *si, const char *opt) |
| 61 | { |
| 62 | } |
| 63 | |
Ard Biesheuvel | 1bd0abb | 2014-11-17 13:50:21 +0100 | [diff] [blame] | 64 | #define EFI_ALLOC_ALIGN SZ_64K |
| 65 | |
Ard Biesheuvel | f3cdfd2 | 2014-10-20 16:27:26 +0200 | [diff] [blame] | 66 | /* |
Ard Biesheuvel | 60305db | 2015-01-22 10:01:40 +0000 | [diff] [blame] | 67 | * 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] | 68 | * distinct stages: |
| 69 | * - The stub retrieves the final version of the memory map from UEFI, populates |
| 70 | * the virt_addr fields and calls the SetVirtualAddressMap() [SVAM] runtime |
| 71 | * service to communicate the new mapping to the firmware (Note that the new |
| 72 | * mapping is not live at this time) |
Ard Biesheuvel | 60305db | 2015-01-22 10:01:40 +0000 | [diff] [blame] | 73 | * - During an early initcall(), the EFI system table is permanently remapped |
| 74 | * and the virtual remapping of the UEFI Runtime Services regions is loaded |
| 75 | * into a private set of page tables. If this all succeeds, the Runtime |
| 76 | * Services are enabled and the EFI_RUNTIME_SERVICES bit set. |
Ard Biesheuvel | f3cdfd2 | 2014-10-20 16:27:26 +0200 | [diff] [blame] | 77 | */ |
Ard Biesheuvel | f3cdfd2 | 2014-10-20 16:27:26 +0200 | [diff] [blame] | 78 | |
Ard Biesheuvel | f7d9248 | 2015-11-30 13:28:19 +0100 | [diff] [blame] | 79 | static inline void efi_set_pgd(struct mm_struct *mm) |
| 80 | { |
| 81 | switch_mm(NULL, mm, NULL); |
| 82 | } |
| 83 | |
Ard Biesheuvel | f3cdfd2 | 2014-10-20 16:27:26 +0200 | [diff] [blame] | 84 | void efi_virtmap_load(void); |
| 85 | void efi_virtmap_unload(void); |
| 86 | |
Mark Salter | f84d027 | 2014-04-15 21:59:30 -0400 | [diff] [blame] | 87 | #endif /* _ASM_EFI_H */ |