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 */ 55