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
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 typedef 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
50 struct kimage;
51 extern const unsigned char relocate_new_kernel[];
52 extern const size_t relocate_new_kernel_size;
53 extern void kexec_reboot(void);
54
55 #ifdef CONFIG_SMP
56 extern atomic_t kexec_ready_to_reboot;
57 extern const unsigned char kexec_smp_wait[];
58 #endif
59
60 #endif /* !_ASM_KEXEC_H */
61
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