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
90
91
92
93
94
|
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2015 Linaro Ltd <ard.biesheuvel@linaro.org>
*/
#ifndef __ASM_ARM_EFI_H
#define __ASM_ARM_EFI_H
#include <asm/cacheflush.h>
#include <asm/cachetype.h>
#include <asm/early_ioremap.h>
#include <asm/fixmap.h>
#include <asm/highmem.h>
#include <asm/mach/map.h>
#include <asm/mmu_context.h>
#include <asm/ptrace.h>
#include <asm/uaccess.h>
#ifdef CONFIG_EFI
void efi_init(void);
void arm_efi_init(void);
int efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md);
int efi_set_mapping_permissions(struct mm_struct *mm, efi_memory_desc_t *md, bool);
#define arch_efi_call_virt_setup() efi_virtmap_load()
#define arch_efi_call_virt_teardown() efi_virtmap_unload()
#ifdef CONFIG_CPU_TTBR0_PAN
#undef arch_efi_call_virt
#define arch_efi_call_virt(p, f, args...) ({ \
unsigned int flags = uaccess_save_and_enable(); \
efi_status_t res = _Generic((p)->f(args), \
efi_status_t: (p)->f(args), \
default: ((p)->f(args), EFI_ABORTED)); \
uaccess_restore(flags); \
res; \
})
#endif
#define ARCH_EFI_IRQ_FLAGS_MASK \
(PSR_J_BIT | PSR_E_BIT | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT | \
PSR_T_BIT | MODE_MASK)
static inline void efi_set_pgd(struct mm_struct *mm)
{
check_and_switch_context(mm, NULL);
}
void efi_virtmap_load(void);
void efi_virtmap_unload(void);
#else
#define arm_efi_init()
#endif /* CONFIG_EFI */
/* arch specific definitions used by the stub code */
/*
* A reasonable upper bound for the uncompressed kernel size is 32 MBytes,
* so we will reserve that amount of memory. We have no easy way to tell what
* the actuall size of code + data the uncompressed kernel will use.
* If this is insufficient, the decompressor will relocate itself out of the
* way before performing the decompression.
*/
#define MAX_UNCOMP_KERNEL_SIZE SZ_32M
/*
* phys-to-virt patching requires that the physical to virtual offset is a
* multiple of 2 MiB. However, using an alignment smaller than TEXT_OFFSET
* here throws off the memory allocation logic, so let's use the lowest power
* of two greater than 2 MiB and greater than TEXT_OFFSET.
*/
#define EFI_PHYS_ALIGN max(UL(SZ_2M), roundup_pow_of_two(TEXT_OFFSET))
/* on ARM, the initrd should be loaded in a lowmem region */
static inline unsigned long efi_get_max_initrd_addr(unsigned long image_addr)
{
return round_down(image_addr, SZ_4M) + SZ_512M;
}
struct efi_arm_entry_state {
u32 cpsr_before_ebs;
u32 sctlr_before_ebs;
u32 cpsr_after_ebs;
u32 sctlr_after_ebs;
};
static inline void efi_capsule_flush_cache_range(void *addr, int size)
{
__cpuc_flush_dcache_area(addr, size);
}
#endif /* _ASM_ARM_EFI_H */
|
