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Merge tag 'amd-drm-next-6.5-2023-06-09' of https://gitlab.freedesktop.org/agd5f/linux...
[linux.git] / arch / riscv / include / asm / efi.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Copyright (C) 2020 Western Digital Corporation or its affiliates.
4  */
5 #ifndef _ASM_EFI_H
6 #define _ASM_EFI_H
7
8 #include <asm/csr.h>
9 #include <asm/io.h>
10 #include <asm/mmu_context.h>
11 #include <asm/ptrace.h>
12 #include <asm/tlbflush.h>
13 #include <asm/pgalloc.h>
14
15 #ifdef CONFIG_EFI
16 extern void efi_init(void);
17 #else
18 #define efi_init()
19 #endif
20
21 int efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md);
22 int efi_set_mapping_permissions(struct mm_struct *mm, efi_memory_desc_t *md, bool);
23
24 #define arch_efi_call_virt_setup()      ({              \
25                 sync_kernel_mappings(efi_mm.pgd);       \
26                 efi_virtmap_load();                     \
27         })
28 #define arch_efi_call_virt_teardown()   efi_virtmap_unload()
29
30 #define ARCH_EFI_IRQ_FLAGS_MASK (SR_IE | SR_SPIE)
31
32 /* Load initrd anywhere in system RAM */
33 static inline unsigned long efi_get_max_initrd_addr(unsigned long image_addr)
34 {
35         return ULONG_MAX;
36 }
37
38 static inline unsigned long efi_get_kimg_min_align(void)
39 {
40         /*
41          * RISC-V requires the kernel image to placed 2 MB aligned base for 64
42          * bit and 4MB for 32 bit.
43          */
44         return IS_ENABLED(CONFIG_64BIT) ? SZ_2M : SZ_4M;
45 }
46
47 #define EFI_KIMG_PREFERRED_ADDRESS      efi_get_kimg_min_align()
48
49 void efi_virtmap_load(void);
50 void efi_virtmap_unload(void);
51
52 unsigned long stext_offset(void);
53
54 #endif /* _ASM_EFI_H */
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