Commit | Line | Data |
---|---|---|
b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
7d5f5fa2 GU |
2 | /* |
3 | * machine_kexec.c - handle transition of Linux booting another kernel | |
4 | */ | |
5 | #include <linux/compiler.h> | |
6 | #include <linux/kexec.h> | |
7 | #include <linux/mm.h> | |
8 | #include <linux/delay.h> | |
aaee8c7f | 9 | #include <linux/reboot.h> |
7d5f5fa2 GU |
10 | |
11 | #include <asm/cacheflush.h> | |
12 | #include <asm/page.h> | |
13 | #include <asm/setup.h> | |
14 | ||
15 | extern const unsigned char relocate_new_kernel[]; | |
16 | extern const size_t relocate_new_kernel_size; | |
17 | ||
18 | int machine_kexec_prepare(struct kimage *kimage) | |
19 | { | |
20 | return 0; | |
21 | } | |
22 | ||
23 | void machine_kexec_cleanup(struct kimage *kimage) | |
24 | { | |
25 | } | |
26 | ||
27 | void machine_shutdown(void) | |
28 | { | |
29 | } | |
30 | ||
31 | void machine_crash_shutdown(struct pt_regs *regs) | |
32 | { | |
33 | } | |
34 | ||
35 | typedef void (*relocate_kernel_t)(unsigned long ptr, | |
36 | unsigned long start, | |
37 | unsigned long cpu_mmu_flags) __noreturn; | |
38 | ||
39 | void machine_kexec(struct kimage *image) | |
40 | { | |
41 | void *reboot_code_buffer; | |
42 | unsigned long cpu_mmu_flags; | |
43 | ||
44 | reboot_code_buffer = page_address(image->control_code_page); | |
45 | ||
46 | memcpy(reboot_code_buffer, relocate_new_kernel, | |
47 | relocate_new_kernel_size); | |
48 | ||
49 | /* | |
50 | * we do not want to be bothered. | |
51 | */ | |
52 | local_irq_disable(); | |
53 | ||
54 | pr_info("Will call new kernel at 0x%08lx. Bye...\n", image->start); | |
55 | __flush_cache_all(); | |
56 | cpu_mmu_flags = m68k_cputype | m68k_mmutype << 8; | |
57 | ((relocate_kernel_t) reboot_code_buffer)(image->head & PAGE_MASK, | |
58 | image->start, | |
59 | cpu_mmu_flags); | |
60 | } |