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_IRQ_FLAGS_MASK (SR_IE | SR_SPIE)
25
26 /* Load initrd anywhere in system RAM */
27 static inline unsigned long efi_get_max_initrd_addr(unsigned long image_addr)
28 {
29 return ULONG_MAX;
30 }
31
32 static inline unsigned long efi_get_kimg_min_align(void)
33 {
34 /*
35 * RISC-V requires the kernel image to placed 2 MB aligned base for 64
36 * bit and 4MB for 32 bit.
37 */
38 return IS_ENABLED(CONFIG_64BIT) ? SZ_2M : SZ_4M;
39 }
40
41 #define EFI_KIMG_PREFERRED_ADDRESS efi_get_kimg_min_align()
42
43 void arch_efi_call_virt_setup(void);
44 void arch_efi_call_virt_teardown(void);
45
46 unsigned long stext_offset(void);
47
48 void efi_icache_sync(unsigned long start, unsigned long end);
49
50 #endif /* _ASM_EFI_H */
51
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