1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * kexec.h for kexec
4 *
5 * Copyright (C) 2022 Loongson Technology Corporation Limited
6 */
7
8#ifndef _ASM_KEXEC_H
9#define _ASM_KEXEC_H
10
11#include <asm/stacktrace.h>
12#include <asm/page.h>
13
14/* Maximum physical address we can use pages from */
15#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
16/* Maximum address we can reach in physical address mode */
17#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
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/* The native architecture */
25#define KEXEC_ARCH KEXEC_ARCH_LOONGARCH
26
27static inline void crash_setup_regs(struct pt_regs *newregs,
28				    struct pt_regs *oldregs)
29{
30	if (oldregs)
31		memcpy(newregs, oldregs, sizeof(*newregs));
32	else
33		prepare_frametrace(newregs);
34}
35
36#define ARCH_HAS_KIMAGE_ARCH
37
38struct kimage_arch {
39	unsigned long efi_boot;
40	unsigned long cmdline_ptr;
41	unsigned long systable_ptr;
42};
43
44typedef void (*do_kexec_t)(unsigned long efi_boot,
45			   unsigned long cmdline_ptr,
46			   unsigned long systable_ptr,
47			   unsigned long start_addr,
48			   unsigned long first_ind_entry);
49
50struct kimage;
51extern const unsigned char relocate_new_kernel[];
52extern const size_t relocate_new_kernel_size;
53extern void kexec_reboot(void);
54
55#ifdef CONFIG_SMP
56extern atomic_t kexec_ready_to_reboot;
57extern const unsigned char kexec_smp_wait[];
58#endif
59
60#endif /* !_ASM_KEXEC_H */
61