1 /* SPDX-License-Identifier: GPL-2.0 */
3 #ifndef _DRIVERS_FIRMWARE_EFI_EFISTUB_H
4 #define _DRIVERS_FIRMWARE_EFI_EFISTUB_H
6 /* error code which can't be mistaken for valid address */
7 #define EFI_ERROR (~0UL)
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.
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.
24 #ifndef EFI_ALLOC_ALIGN
25 #define EFI_ALLOC_ALIGN EFI_PAGE_SIZE
28 extern int __pure nokaslr(void);
29 extern int __pure is_quiet(void);
31 #define pr_efi(sys_table, msg) do { \
32 if (!is_quiet()) efi_printk(sys_table, "EFI stub: "msg); \
35 #define pr_efi_err(sys_table, msg) efi_printk(sys_table, "EFI stub: ERROR: "msg)
37 void efi_char16_printk(efi_system_table_t *, efi_char16_t *);
39 unsigned long get_dram_base(efi_system_table_t *sys_table_arg);
41 efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table,
43 unsigned long *new_fdt_addr,
44 unsigned long max_addr,
45 u64 initrd_addr, u64 initrd_size,
47 unsigned long fdt_addr,
48 unsigned long fdt_size);
50 void *get_fdt(efi_system_table_t *sys_table, unsigned long *fdt_size);
52 void efi_get_virtmap(efi_memory_desc_t *memory_map, unsigned long map_size,
53 unsigned long desc_size, efi_memory_desc_t *runtime_map,
56 efi_status_t efi_get_random_bytes(efi_system_table_t *sys_table,
57 unsigned long size, u8 *out);
59 efi_status_t efi_random_alloc(efi_system_table_t *sys_table_arg,
60 unsigned long size, unsigned long align,
61 unsigned long *addr, unsigned long random_seed);
63 efi_status_t check_platform_features(efi_system_table_t *sys_table_arg);
65 efi_status_t efi_random_get_seed(efi_system_table_t *sys_table_arg);