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
crash_setup_regs(struct pt_regs * newregs,struct pt_regs * oldregs)27 static 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
38 struct kimage_arch {
39 unsigned long efi_boot;
40 unsigned long cmdline_ptr;
41 unsigned long systable_ptr;
42 };
43
44 #ifdef CONFIG_KEXEC_FILE
45 extern const struct kexec_file_ops kexec_efi_ops;
46 extern const struct kexec_file_ops kexec_elf_ops;
47
48 int arch_kimage_file_post_load_cleanup(struct kimage *image);
49 #define arch_kimage_file_post_load_cleanup arch_kimage_file_post_load_cleanup
50
51 extern int load_other_segments(struct kimage *image,
52 unsigned long kernel_load_addr, unsigned long kernel_size,
53 char *initrd, unsigned long initrd_len, char *cmdline, unsigned long cmdline_len);
54 #endif
55
56 typedef void (*do_kexec_t)(unsigned long efi_boot,
57 unsigned long cmdline_ptr,
58 unsigned long systable_ptr,
59 unsigned long start_addr,
60 unsigned long first_ind_entry);
61
62 struct kimage;
63 extern const unsigned char relocate_new_kernel[];
64 extern const size_t relocate_new_kernel_size;
65 extern void kexec_reboot(void);
66
67 #ifdef CONFIG_SMP
68 extern atomic_t kexec_ready_to_reboot;
69 extern const unsigned char kexec_smp_wait[];
70 #endif
71
72 #endif /* !_ASM_KEXEC_H */
73