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 unsigned long fdt_addr; 43 }; 44 45 extern const unsigned char riscv_kexec_relocate[]; 46 extern const unsigned int riscv_kexec_relocate_size; 47 48 typedef void (*riscv_kexec_method)(unsigned long first_ind_entry, 49 unsigned long jump_addr, 50 unsigned long fdt_addr, 51 unsigned long hartid, 52 unsigned long va_pa_off); 53 54 extern riscv_kexec_method riscv_kexec_norelocate; 55 56 #ifdef CONFIG_KEXEC_FILE 57 extern const struct kexec_file_ops elf_kexec_ops; 58 59 struct purgatory_info; 60 int arch_kexec_apply_relocations_add(struct purgatory_info *pi, 61 Elf_Shdr *section, 62 const Elf_Shdr *relsec, 63 const Elf_Shdr *symtab); 64 #define arch_kexec_apply_relocations_add arch_kexec_apply_relocations_add 65 #endif 66 67 #endif 68