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_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 */