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