arch/riscv/include/asm/kexec.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (C) 2019 FORTH-ICS/CARV
   4  *  Nick Kossifidis <mick@ics.forth.gr>
   5  */
   6
   7 #ifndef _RISCV_KEXEC_H
   8 #define _RISCV_KEXEC_H
   9
  10 #include <asm/page.h>    /* For PAGE_SIZE */
  11
  12 /* Maximum physical address we can use pages from */
  13 #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
  14
  15 /* Maximum address we can reach in physical address mode */
  16 #define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
  17
  18 /* Maximum address we can use for the control code buffer */
  19 #define KEXEC_CONTROL_MEMORY_LIMIT (-1UL)
  20
  21 /* Reserve a page for the control code buffer */
  22 #define KEXEC_CONTROL_PAGE_SIZE PAGE_SIZE
  23
  24 #define KEXEC_ARCH KEXEC_ARCH_RISCV
  25
  26 extern void riscv_crash_save_regs(struct pt_regs *newregs);
  27
  28 static inline void
  29 crash_setup_regs(struct pt_regs *newregs,
  30                  struct pt_regs *oldregs)
  31 {
  32         if (oldregs)
  33                 memcpy(newregs, oldregs, sizeof(struct pt_regs));
  34         else
  35                 riscv_crash_save_regs(newregs);
  36 }
  37
  38
  39 #define ARCH_HAS_KIMAGE_ARCH
  40
  41 struct kimage_arch {
  42         void *fdt; /* For CONFIG_KEXEC_FILE */
  43         unsigned long fdt_addr;
  44 };
  45
  46 extern const unsigned char riscv_kexec_relocate[];
  47 extern const unsigned int riscv_kexec_relocate_size;
  48
  49 typedef void (*riscv_kexec_method)(unsigned long first_ind_entry,
  50                                    unsigned long jump_addr,
  51                                    unsigned long fdt_addr,
  52                                    unsigned long hartid,
  53                                    unsigned long va_pa_off);
  54
  55 extern riscv_kexec_method riscv_kexec_norelocate;
  56
  57 #ifdef CONFIG_KEXEC_FILE
  58 extern const struct kexec_file_ops elf_kexec_ops;
  59
  60 struct purgatory_info;
  61 int arch_kexec_apply_relocations_add(struct purgatory_info *pi,
  62                                      Elf_Shdr *section,
  63                                      const Elf_Shdr *relsec,
  64                                      const Elf_Shdr *symtab);
  65 #define arch_kexec_apply_relocations_add arch_kexec_apply_relocations_add
  66
  67 struct kimage;
  68 int arch_kimage_file_post_load_cleanup(struct kimage *image);
  69 #define arch_kimage_file_post_load_cleanup arch_kimage_file_post_load_cleanup
  70 #endif
  71
  72 #endif