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 void *get_efi_config_table(efi_system_table_t *sys_table, efi_guid_t guid); 67 68 /* Helper macros for the usual case of using simple C variables: */ 69 #ifndef fdt_setprop_inplace_var 70 #define fdt_setprop_inplace_var(fdt, node_offset, name, var) \ 71 fdt_setprop_inplace((fdt), (node_offset), (name), &(var), sizeof(var)) 72 #endif 73 74 #ifndef fdt_setprop_var 75 #define fdt_setprop_var(fdt, node_offset, name, var) \ 76 fdt_setprop((fdt), (node_offset), (name), &(var), sizeof(var)) 77 #endif 78 79 #endif 80