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 
31 #define pr_efi(sys_table, msg)		do {				\
32 	if (!is_quiet()) efi_printk(sys_table, "EFI stub: "msg);	\
33 } while (0)
34 
35 #define pr_efi_err(sys_table, msg) efi_printk(sys_table, "EFI stub: ERROR: "msg)
36 
37 void efi_char16_printk(efi_system_table_t *, efi_char16_t *);
38 
39 unsigned long get_dram_base(efi_system_table_t *sys_table_arg);
40 
41 efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table,
42 					    void *handle,
43 					    unsigned long *new_fdt_addr,
44 					    unsigned long max_addr,
45 					    u64 initrd_addr, u64 initrd_size,
46 					    char *cmdline_ptr,
47 					    unsigned long fdt_addr,
48 					    unsigned long fdt_size);
49 
50 void *get_fdt(efi_system_table_t *sys_table, unsigned long *fdt_size);
51 
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,
54 		     int *count);
55 
56 efi_status_t efi_get_random_bytes(efi_system_table_t *sys_table,
57 				  unsigned long size, u8 *out);
58 
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);
62 
63 efi_status_t check_platform_features(efi_system_table_t *sys_table_arg);
64 
65 efi_status_t efi_random_get_seed(efi_system_table_t *sys_table_arg);
66 
67 #endif
68