| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | |
| 3 | #ifndef _DRIVERS_FIRMWARE_EFI_EFISTUB_H |
| 4 | #define _DRIVERS_FIRMWARE_EFI_EFISTUB_H |
| 5 | |
| 6 | /* error code which can't be mistaken for valid address */ |
| 7 | #define EFI_ERROR (~0UL) |
| 8 | |
| 9 | /* |
| 10 | * __init annotations should not be used in the EFI stub, since the code is |
| 11 | * either included in the decompressor (x86, ARM) where they have no effect, |
| 12 | * or the whole stub is __init annotated at the section level (arm64), by |
| 13 | * renaming the sections, in which case the __init annotation will be |
| 14 | * redundant, and will result in section names like .init.init.text, and our |
| 15 | * linker script does not expect that. |
| 16 | */ |
| 17 | #undef __init |
| 18 | |
| 19 | /* |
| 20 | * Allow the platform to override the allocation granularity: this allows |
| 21 | * systems that have the capability to run with a larger page size to deal |
| 22 | * with the allocations for initrd and fdt more efficiently. |
| 23 | */ |
| 24 | #ifndef EFI_ALLOC_ALIGN |
| 25 | #define EFI_ALLOC_ALIGN EFI_PAGE_SIZE |
| 26 | #endif |
| 27 | |
| 28 | extern int __pure nokaslr(void); |
| 29 | extern int __pure is_quiet(void); |
| 30 | extern int __pure novamap(void); |
| 31 | |
| 32 | #define pr_efi(sys_table, msg) do { \ |
| 33 | if (!is_quiet()) efi_printk(sys_table, "EFI stub: "msg); \ |
| 34 | } while (0) |
| 35 | |
| 36 | #define pr_efi_err(sys_table, msg) efi_printk(sys_table, "EFI stub: ERROR: "msg) |
| 37 | |
| 38 | void efi_char16_printk(efi_system_table_t *, efi_char16_t *); |
| 39 | |
| 40 | unsigned long get_dram_base(efi_system_table_t *sys_table_arg); |
| 41 | |
| 42 | efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table, |
| 43 | void *handle, |
| 44 | unsigned long *new_fdt_addr, |
| 45 | unsigned long max_addr, |
| 46 | u64 initrd_addr, u64 initrd_size, |
| 47 | char *cmdline_ptr, |
| 48 | unsigned long fdt_addr, |
| 49 | unsigned long fdt_size); |
| 50 | |
| 51 | void *get_fdt(efi_system_table_t *sys_table, unsigned long *fdt_size); |
| 52 | |
| 53 | void efi_get_virtmap(efi_memory_desc_t *memory_map, unsigned long map_size, |
| 54 | unsigned long desc_size, efi_memory_desc_t *runtime_map, |
| 55 | int *count); |
| 56 | |
| 57 | efi_status_t efi_get_random_bytes(efi_system_table_t *sys_table, |
| 58 | unsigned long size, u8 *out); |
| 59 | |
| 60 | efi_status_t efi_random_alloc(efi_system_table_t *sys_table_arg, |
| 61 | unsigned long size, unsigned long align, |
| 62 | unsigned long *addr, unsigned long random_seed); |
| 63 | |
| 64 | efi_status_t check_platform_features(efi_system_table_t *sys_table_arg); |
| 65 | |
| 66 | efi_status_t efi_random_get_seed(efi_system_table_t *sys_table_arg); |
| 67 | |
| 68 | void *get_efi_config_table(efi_system_table_t *sys_table, efi_guid_t guid); |
| 69 | |
| 70 | /* Helper macros for the usual case of using simple C variables: */ |
| 71 | #ifndef fdt_setprop_inplace_var |
| 72 | #define fdt_setprop_inplace_var(fdt, node_offset, name, var) \ |
| 73 | fdt_setprop_inplace((fdt), (node_offset), (name), &(var), sizeof(var)) |
| 74 | #endif |
| 75 | |
| 76 | #ifndef fdt_setprop_var |
| 77 | #define fdt_setprop_var(fdt, node_offset, name, var) \ |
| 78 | fdt_setprop((fdt), (node_offset), (name), &(var), sizeof(var)) |
| 79 | #endif |
| 80 | |
| 81 | #endif |