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
26extern void riscv_crash_save_regs(struct pt_regs *newregs);
27
28static inline void
29crash_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
41struct kimage_arch {
42	void *fdt; /* For CONFIG_KEXEC_FILE */
43	unsigned long fdt_addr;
44};
45
46extern const unsigned char riscv_kexec_relocate[];
47extern const unsigned int riscv_kexec_relocate_size;
48
49typedef 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
55extern riscv_kexec_method riscv_kexec_norelocate;
56
57#ifdef CONFIG_KEXEC_FILE
58extern const struct kexec_file_ops elf_kexec_ops;
59extern const struct kexec_file_ops image_kexec_ops;
60
61struct purgatory_info;
62int arch_kexec_apply_relocations_add(struct purgatory_info *pi,
63				     Elf_Shdr *section,
64				     const Elf_Shdr *relsec,
65				     const Elf_Shdr *symtab);
66#define arch_kexec_apply_relocations_add arch_kexec_apply_relocations_add
67
68struct kimage;
69int arch_kimage_file_post_load_cleanup(struct kimage *image);
70#define arch_kimage_file_post_load_cleanup arch_kimage_file_post_load_cleanup
71
72int load_extra_segments(struct kimage *image, unsigned long kernel_start,
73			unsigned long kernel_len, char *initrd,
74			unsigned long initrd_len, char *cmdline,
75			unsigned long cmdline_len);
76#endif
77
78#endif