1fba8a867SNick Kossifidis /* SPDX-License-Identifier: GPL-2.0 */
2fba8a867SNick Kossifidis /*
3fba8a867SNick Kossifidis * Copyright (C) 2019 FORTH-ICS/CARV
4fba8a867SNick Kossifidis * Nick Kossifidis <mick@ics.forth.gr>
5fba8a867SNick Kossifidis */
6fba8a867SNick Kossifidis
7fba8a867SNick Kossifidis #ifndef _RISCV_KEXEC_H
8fba8a867SNick Kossifidis #define _RISCV_KEXEC_H
9fba8a867SNick Kossifidis
10fba8a867SNick Kossifidis #include <asm/page.h> /* For PAGE_SIZE */
11fba8a867SNick Kossifidis
12fba8a867SNick Kossifidis /* Maximum physical address we can use pages from */
13fba8a867SNick Kossifidis #define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
14fba8a867SNick Kossifidis
15fba8a867SNick Kossifidis /* Maximum address we can reach in physical address mode */
16fba8a867SNick Kossifidis #define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
17fba8a867SNick Kossifidis
18fba8a867SNick Kossifidis /* Maximum address we can use for the control code buffer */
19fba8a867SNick Kossifidis #define KEXEC_CONTROL_MEMORY_LIMIT (-1UL)
20fba8a867SNick Kossifidis
21fba8a867SNick Kossifidis /* Reserve a page for the control code buffer */
22fba8a867SNick Kossifidis #define KEXEC_CONTROL_PAGE_SIZE PAGE_SIZE
23fba8a867SNick Kossifidis
24fba8a867SNick Kossifidis #define KEXEC_ARCH KEXEC_ARCH_RISCV
25fba8a867SNick Kossifidis
26e53d2818SNick Kossifidis extern void riscv_crash_save_regs(struct pt_regs *newregs);
27e53d2818SNick Kossifidis
28fba8a867SNick Kossifidis static inline void
crash_setup_regs(struct pt_regs * newregs,struct pt_regs * oldregs)29fba8a867SNick Kossifidis crash_setup_regs(struct pt_regs *newregs,
30fba8a867SNick Kossifidis struct pt_regs *oldregs)
31fba8a867SNick Kossifidis {
32e53d2818SNick Kossifidis if (oldregs)
33e53d2818SNick Kossifidis memcpy(newregs, oldregs, sizeof(struct pt_regs));
34e53d2818SNick Kossifidis else
35e53d2818SNick Kossifidis riscv_crash_save_regs(newregs);
36fba8a867SNick Kossifidis }
37fba8a867SNick Kossifidis
38fba8a867SNick Kossifidis
39fba8a867SNick Kossifidis #define ARCH_HAS_KIMAGE_ARCH
40fba8a867SNick Kossifidis
41fba8a867SNick Kossifidis struct kimage_arch {
42*96df59b1SLi Huafei void *fdt; /* For CONFIG_KEXEC_FILE */
43fba8a867SNick Kossifidis unsigned long fdt_addr;
44fba8a867SNick Kossifidis };
45fba8a867SNick Kossifidis
46bab0d47cSJisheng Zhang extern const unsigned char riscv_kexec_relocate[];
47bab0d47cSJisheng Zhang extern const unsigned int riscv_kexec_relocate_size;
48fba8a867SNick Kossifidis
49e53d2818SNick Kossifidis typedef void (*riscv_kexec_method)(unsigned long first_ind_entry,
50fba8a867SNick Kossifidis unsigned long jump_addr,
51fba8a867SNick Kossifidis unsigned long fdt_addr,
52fba8a867SNick Kossifidis unsigned long hartid,
53fba8a867SNick Kossifidis unsigned long va_pa_off);
54fba8a867SNick Kossifidis
55e53d2818SNick Kossifidis extern riscv_kexec_method riscv_kexec_norelocate;
56e53d2818SNick Kossifidis
576261586eSLiao Chang #ifdef CONFIG_KEXEC_FILE
586261586eSLiao Chang extern const struct kexec_file_ops elf_kexec_ops;
597699f7aaSUwe Kleine-König
607699f7aaSUwe Kleine-König struct purgatory_info;
617699f7aaSUwe Kleine-König int arch_kexec_apply_relocations_add(struct purgatory_info *pi,
627699f7aaSUwe Kleine-König Elf_Shdr *section,
637699f7aaSUwe Kleine-König const Elf_Shdr *relsec,
647699f7aaSUwe Kleine-König const Elf_Shdr *symtab);
657699f7aaSUwe Kleine-König #define arch_kexec_apply_relocations_add arch_kexec_apply_relocations_add
66*96df59b1SLi Huafei
67*96df59b1SLi Huafei struct kimage;
68*96df59b1SLi Huafei int arch_kimage_file_post_load_cleanup(struct kimage *image);
69*96df59b1SLi Huafei #define arch_kimage_file_post_load_cleanup arch_kimage_file_post_load_cleanup
706261586eSLiao Chang #endif
716261586eSLiao Chang
72fba8a867SNick Kossifidis #endif
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