1b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 2f4f75ad5SArd Biesheuvel 3f4f75ad5SArd Biesheuvel #ifndef _DRIVERS_FIRMWARE_EFI_EFISTUB_H 4f4f75ad5SArd Biesheuvel #define _DRIVERS_FIRMWARE_EFI_EFISTUB_H 5f4f75ad5SArd Biesheuvel 6f4f75ad5SArd Biesheuvel /* error code which can't be mistaken for valid address */ 7f4f75ad5SArd Biesheuvel #define EFI_ERROR (~0UL) 8f4f75ad5SArd Biesheuvel 907e83dbbSArd Biesheuvel /* 1007e83dbbSArd Biesheuvel * __init annotations should not be used in the EFI stub, since the code is 1107e83dbbSArd Biesheuvel * either included in the decompressor (x86, ARM) where they have no effect, 1207e83dbbSArd Biesheuvel * or the whole stub is __init annotated at the section level (arm64), by 1307e83dbbSArd Biesheuvel * renaming the sections, in which case the __init annotation will be 1407e83dbbSArd Biesheuvel * redundant, and will result in section names like .init.init.text, and our 1507e83dbbSArd Biesheuvel * linker script does not expect that. 1607e83dbbSArd Biesheuvel */ 1707e83dbbSArd Biesheuvel #undef __init 1807e83dbbSArd Biesheuvel 19a6a14469SArd Biesheuvel /* 20a6a14469SArd Biesheuvel * Allow the platform to override the allocation granularity: this allows 21a6a14469SArd Biesheuvel * systems that have the capability to run with a larger page size to deal 22a6a14469SArd Biesheuvel * with the allocations for initrd and fdt more efficiently. 23a6a14469SArd Biesheuvel */ 24a6a14469SArd Biesheuvel #ifndef EFI_ALLOC_ALIGN 25a6a14469SArd Biesheuvel #define EFI_ALLOC_ALIGN EFI_PAGE_SIZE 26a6a14469SArd Biesheuvel #endif 27a6a14469SArd Biesheuvel 2860f38de7SArd Biesheuvel extern int __pure nokaslr(void); 29eeff7d63SArd Biesheuvel extern int __pure is_quiet(void); 304e46c2a9SArd Biesheuvel extern int __pure novamap(void); 31eeff7d63SArd Biesheuvel 322fcdad2aSArd Biesheuvel extern __pure efi_system_table_t *efi_system_table(void); 332fcdad2aSArd Biesheuvel 348173ec79SArd Biesheuvel #define pr_efi(msg) do { \ 358173ec79SArd Biesheuvel if (!is_quiet()) efi_printk("EFI stub: "msg); \ 36eeff7d63SArd Biesheuvel } while (0) 37eeff7d63SArd Biesheuvel 388173ec79SArd Biesheuvel #define pr_efi_err(msg) efi_printk("EFI stub: ERROR: "msg) 3960f38de7SArd Biesheuvel 408173ec79SArd Biesheuvel void efi_char16_printk(efi_char16_t *); 418173ec79SArd Biesheuvel void efi_char16_printk(efi_char16_t *); 42f4f75ad5SArd Biesheuvel 43f4f75ad5SArd Biesheuvel unsigned long get_dram_base(efi_system_table_t *sys_table_arg); 44f4f75ad5SArd Biesheuvel 45f4f75ad5SArd Biesheuvel efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table, 46f4f75ad5SArd Biesheuvel void *handle, 47f4f75ad5SArd Biesheuvel unsigned long *new_fdt_addr, 48f4f75ad5SArd Biesheuvel unsigned long max_addr, 49f4f75ad5SArd Biesheuvel u64 initrd_addr, u64 initrd_size, 50f4f75ad5SArd Biesheuvel char *cmdline_ptr, 51f4f75ad5SArd Biesheuvel unsigned long fdt_addr, 52f4f75ad5SArd Biesheuvel unsigned long fdt_size); 53f4f75ad5SArd Biesheuvel 54a643375fSArd Biesheuvel void *get_fdt(efi_system_table_t *sys_table, unsigned long *fdt_size); 55f4f75ad5SArd Biesheuvel 56f3cdfd23SArd Biesheuvel void efi_get_virtmap(efi_memory_desc_t *memory_map, unsigned long map_size, 57f3cdfd23SArd Biesheuvel unsigned long desc_size, efi_memory_desc_t *runtime_map, 58f3cdfd23SArd Biesheuvel int *count); 59f3cdfd23SArd Biesheuvel 60e4fbf476SArd Biesheuvel efi_status_t efi_get_random_bytes(efi_system_table_t *sys_table, 61e4fbf476SArd Biesheuvel unsigned long size, u8 *out); 62e4fbf476SArd Biesheuvel 632ddbfc81SArd Biesheuvel efi_status_t efi_random_alloc(efi_system_table_t *sys_table_arg, 642ddbfc81SArd Biesheuvel unsigned long size, unsigned long align, 652ddbfc81SArd Biesheuvel unsigned long *addr, unsigned long random_seed); 662ddbfc81SArd Biesheuvel 67b9d6769bSArd Biesheuvel efi_status_t check_platform_features(efi_system_table_t *sys_table_arg); 68b9d6769bSArd Biesheuvel 6982d736acSMatthew Garrett void *get_efi_config_table(efi_system_table_t *sys_table, efi_guid_t guid); 7082d736acSMatthew Garrett 71ac9aff8eSIngo Molnar /* Helper macros for the usual case of using simple C variables: */ 72ac9aff8eSIngo Molnar #ifndef fdt_setprop_inplace_var 73ac9aff8eSIngo Molnar #define fdt_setprop_inplace_var(fdt, node_offset, name, var) \ 74ac9aff8eSIngo Molnar fdt_setprop_inplace((fdt), (node_offset), (name), &(var), sizeof(var)) 75ac9aff8eSIngo Molnar #endif 76ac9aff8eSIngo Molnar 77ac9aff8eSIngo Molnar #ifndef fdt_setprop_var 78ac9aff8eSIngo Molnar #define fdt_setprop_var(fdt, node_offset, name, var) \ 79ac9aff8eSIngo Molnar fdt_setprop((fdt), (node_offset), (name), &(var), sizeof(var)) 80ac9aff8eSIngo Molnar #endif 81ac9aff8eSIngo Molnar 82f4f75ad5SArd Biesheuvel #endif 83