1 
2 #ifndef _DRIVERS_FIRMWARE_EFI_EFISTUB_H
3 #define _DRIVERS_FIRMWARE_EFI_EFISTUB_H
4 
5 /* error code which can't be mistaken for valid address */
6 #define EFI_ERROR	(~0UL)
7 
8 /*
9  * __init annotations should not be used in the EFI stub, since the code is
10  * either included in the decompressor (x86, ARM) where they have no effect,
11  * or the whole stub is __init annotated at the section level (arm64), by
12  * renaming the sections, in which case the __init annotation will be
13  * redundant, and will result in section names like .init.init.text, and our
14  * linker script does not expect that.
15  */
16 #undef __init
17 
18 /*
19  * Allow the platform to override the allocation granularity: this allows
20  * systems that have the capability to run with a larger page size to deal
21  * with the allocations for initrd and fdt more efficiently.
22  */
23 #ifndef EFI_ALLOC_ALIGN
24 #define EFI_ALLOC_ALIGN		EFI_PAGE_SIZE
25 #endif
26 
27 void efi_char16_printk(efi_system_table_t *, efi_char16_t *);
28 
29 efi_status_t efi_open_volume(efi_system_table_t *sys_table_arg, void *__image,
30 			     void **__fh);
31 
32 unsigned long get_dram_base(efi_system_table_t *sys_table_arg);
33 
34 efi_status_t allocate_new_fdt_and_exit_boot(efi_system_table_t *sys_table,
35 					    void *handle,
36 					    unsigned long *new_fdt_addr,
37 					    unsigned long max_addr,
38 					    u64 initrd_addr, u64 initrd_size,
39 					    char *cmdline_ptr,
40 					    unsigned long fdt_addr,
41 					    unsigned long fdt_size);
42 
43 void *get_fdt(efi_system_table_t *sys_table, unsigned long *fdt_size);
44 
45 void efi_get_virtmap(efi_memory_desc_t *memory_map, unsigned long map_size,
46 		     unsigned long desc_size, efi_memory_desc_t *runtime_map,
47 		     int *count);
48 
49 efi_status_t efi_get_random_bytes(efi_system_table_t *sys_table,
50 				  unsigned long size, u8 *out);
51 
52 efi_status_t efi_random_alloc(efi_system_table_t *sys_table_arg,
53 			      unsigned long size, unsigned long align,
54 			      unsigned long *addr, unsigned long random_seed);
55 
56 efi_status_t check_platform_features(efi_system_table_t *sys_table_arg);
57 
58 efi_status_t efi_random_get_seed(efi_system_table_t *sys_table_arg);
59 
60 #endif
61