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 287d4e323dSArd Biesheuvel #ifdef CONFIG_ARM 297d4e323dSArd Biesheuvel #define __efistub_global __section(.data) 307d4e323dSArd Biesheuvel #else 317d4e323dSArd Biesheuvel #define __efistub_global 327d4e323dSArd Biesheuvel #endif 337d4e323dSArd Biesheuvel 347d4e323dSArd Biesheuvel extern bool __pure nokaslr(void); 357d4e323dSArd Biesheuvel extern bool __pure is_quiet(void); 367d4e323dSArd Biesheuvel extern bool __pure novamap(void); 37eeff7d63SArd Biesheuvel 382fcdad2aSArd Biesheuvel extern __pure efi_system_table_t *efi_system_table(void); 392fcdad2aSArd Biesheuvel 408173ec79SArd Biesheuvel #define pr_efi(msg) do { \ 418173ec79SArd Biesheuvel if (!is_quiet()) efi_printk("EFI stub: "msg); \ 42eeff7d63SArd Biesheuvel } while (0) 43eeff7d63SArd Biesheuvel 448173ec79SArd Biesheuvel #define pr_efi_err(msg) efi_printk("EFI stub: ERROR: "msg) 4560f38de7SArd Biesheuvel 468173ec79SArd Biesheuvel void efi_char16_printk(efi_char16_t *); 478173ec79SArd Biesheuvel void efi_char16_printk(efi_char16_t *); 48f4f75ad5SArd Biesheuvel 49cd33a5c1SArd Biesheuvel unsigned long get_dram_base(void); 50f4f75ad5SArd Biesheuvel 51cd33a5c1SArd Biesheuvel efi_status_t allocate_new_fdt_and_exit_boot(void *handle, 52f4f75ad5SArd Biesheuvel unsigned long *new_fdt_addr, 53f4f75ad5SArd Biesheuvel unsigned long max_addr, 54f4f75ad5SArd Biesheuvel u64 initrd_addr, u64 initrd_size, 55f4f75ad5SArd Biesheuvel char *cmdline_ptr, 56f4f75ad5SArd Biesheuvel unsigned long fdt_addr, 57f4f75ad5SArd Biesheuvel unsigned long fdt_size); 58f4f75ad5SArd Biesheuvel 59cd33a5c1SArd Biesheuvel void *get_fdt(unsigned long *fdt_size); 60f4f75ad5SArd Biesheuvel 61f3cdfd23SArd Biesheuvel void efi_get_virtmap(efi_memory_desc_t *memory_map, unsigned long map_size, 62f3cdfd23SArd Biesheuvel unsigned long desc_size, efi_memory_desc_t *runtime_map, 63f3cdfd23SArd Biesheuvel int *count); 64f3cdfd23SArd Biesheuvel 65cd33a5c1SArd Biesheuvel efi_status_t efi_get_random_bytes(unsigned long size, u8 *out); 66e4fbf476SArd Biesheuvel 67cd33a5c1SArd Biesheuvel efi_status_t efi_random_alloc(unsigned long size, unsigned long align, 682ddbfc81SArd Biesheuvel unsigned long *addr, unsigned long random_seed); 692ddbfc81SArd Biesheuvel 70cd33a5c1SArd Biesheuvel efi_status_t check_platform_features(void); 71b9d6769bSArd Biesheuvel 72cd33a5c1SArd Biesheuvel void *get_efi_config_table(efi_guid_t guid); 7382d736acSMatthew Garrett 74ac9aff8eSIngo Molnar /* Helper macros for the usual case of using simple C variables: */ 75ac9aff8eSIngo Molnar #ifndef fdt_setprop_inplace_var 76ac9aff8eSIngo Molnar #define fdt_setprop_inplace_var(fdt, node_offset, name, var) \ 77ac9aff8eSIngo Molnar fdt_setprop_inplace((fdt), (node_offset), (name), &(var), sizeof(var)) 78ac9aff8eSIngo Molnar #endif 79ac9aff8eSIngo Molnar 80ac9aff8eSIngo Molnar #ifndef fdt_setprop_var 81ac9aff8eSIngo Molnar #define fdt_setprop_var(fdt, node_offset, name, var) \ 82ac9aff8eSIngo Molnar fdt_setprop((fdt), (node_offset), (name), &(var), sizeof(var)) 83ac9aff8eSIngo Molnar #endif 84ac9aff8eSIngo Molnar 85966291f6SArd Biesheuvel #define get_efi_var(name, vendor, ...) \ 86966291f6SArd Biesheuvel efi_rt_call(get_variable, (efi_char16_t *)(name), \ 87966291f6SArd Biesheuvel (efi_guid_t *)(vendor), __VA_ARGS__) 88966291f6SArd Biesheuvel 89966291f6SArd Biesheuvel #define set_efi_var(name, vendor, ...) \ 90966291f6SArd Biesheuvel efi_rt_call(set_variable, (efi_char16_t *)(name), \ 91966291f6SArd Biesheuvel (efi_guid_t *)(vendor), __VA_ARGS__) 92966291f6SArd Biesheuvel 93c2d0b470SArd Biesheuvel typedef union efi_uga_draw_protocol efi_uga_draw_protocol_t; 94c2d0b470SArd Biesheuvel 95c2d0b470SArd Biesheuvel union efi_uga_draw_protocol { 96c2d0b470SArd Biesheuvel struct { 97c2d0b470SArd Biesheuvel efi_status_t (__efiapi *get_mode)(efi_uga_draw_protocol_t *, 98c2d0b470SArd Biesheuvel u32*, u32*, u32*, u32*); 99c2d0b470SArd Biesheuvel void *set_mode; 100c2d0b470SArd Biesheuvel void *blt; 101c2d0b470SArd Biesheuvel }; 102c2d0b470SArd Biesheuvel struct { 103c2d0b470SArd Biesheuvel u32 get_mode; 104c2d0b470SArd Biesheuvel u32 set_mode; 105c2d0b470SArd Biesheuvel u32 blt; 106c2d0b470SArd Biesheuvel } mixed_mode; 107c2d0b470SArd Biesheuvel }; 108c2d0b470SArd Biesheuvel 109f4f75ad5SArd Biesheuvel #endif 110