blob: 79dc8c237c7eaf8c566d67193ef84715225c267d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
#ifndef _ASM_EFI_H
#define _ASM_EFI_H
#include <asm/io.h>
#include <asm/mmu_context.h>
#include <asm/neon.h>
#include <asm/tlbflush.h>
#ifdef CONFIG_EFI
extern void efi_init(void);
#else
#define efi_init()
#endif
int efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md);
#define efi_set_mapping_permissions efi_create_mapping
#define efi_call_virt(f, ...) \
({ \
efi_##f##_t *__f; \
efi_status_t __s; \
\
kernel_neon_begin(); \
efi_virtmap_load(); \
__f = efi.systab->runtime->f; \
__s = __f(__VA_ARGS__); \
efi_virtmap_unload(); \
kernel_neon_end(); \
__s; \
})
#define __efi_call_virt(f, ...) \
({ \
efi_##f##_t *__f; \
\
kernel_neon_begin(); \
efi_virtmap_load(); \
__f = efi.systab->runtime->f; \
__f(__VA_ARGS__); \
efi_virtmap_unload(); \
kernel_neon_end(); \
})
/* arch specific definitions used by the stub code */
/*
* AArch64 requires the DTB to be 8-byte aligned in the first 512MiB from
* start of kernel and may not cross a 2MiB boundary. We set alignment to
* 2MiB so we know it won't cross a 2MiB boundary.
*/
#define EFI_FDT_ALIGN SZ_2M /* used by allocate_new_fdt_and_exit_boot() */
#define MAX_FDT_OFFSET SZ_512M
#define efi_call_early(f, ...) sys_table_arg->boottime->f(__VA_ARGS__)
#define __efi_call_early(f, ...) f(__VA_ARGS__)
#define efi_is_64bit() (true)
#define alloc_screen_info(x...) &screen_info
#define free_screen_info(x...)
static inline void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
{
}
#define EFI_ALLOC_ALIGN SZ_64K
/*
* On ARM systems, virtually remapped UEFI runtime services are set up in two
* distinct stages:
* - The stub retrieves the final version of the memory map from UEFI, populates
* the virt_addr fields and calls the SetVirtualAddressMap() [SVAM] runtime
* service to communicate the new mapping to the firmware (Note that the new
* mapping is not live at this time)
* - During an early initcall(), the EFI system table is permanently remapped
* and the virtual remapping of the UEFI Runtime Services regions is loaded
* into a private set of page tables. If this all succeeds, the Runtime
* Services are enabled and the EFI_RUNTIME_SERVICES bit set.
*/
static inline void efi_set_pgd(struct mm_struct *mm)
{
switch_mm(NULL, mm, NULL);
}
void efi_virtmap_load(void);
void efi_virtmap_unload(void);
#endif /* _ASM_EFI_H */
|
