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author | Geert Uytterhoeven <geert@linux-m68k.org> | 2013-08-20 22:51:47 +0200 |
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committer | Geert Uytterhoeven <geert@linux-m68k.org> | 2013-12-08 11:01:47 +0100 |
commit | 7d5f5fa276efbbe45f0ed270b3f4e4a2816398c2 (patch) | |
tree | 34e7ba2d35c238bd80bfdbacbc03f209da587942 /arch/m68k/kernel/machine_kexec.c | |
parent | 6cf30b35475435f453d87838fb14ad3483955a19 (diff) | |
download | linux-7d5f5fa276efbbe45f0ed270b3f4e4a2816398c2.tar.bz2 |
m68k: Add kexec support
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'arch/m68k/kernel/machine_kexec.c')
-rw-r--r-- | arch/m68k/kernel/machine_kexec.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/arch/m68k/kernel/machine_kexec.c b/arch/m68k/kernel/machine_kexec.c new file mode 100644 index 000000000000..d4affc917d9d --- /dev/null +++ b/arch/m68k/kernel/machine_kexec.c @@ -0,0 +1,58 @@ +/* + * machine_kexec.c - handle transition of Linux booting another kernel + */ +#include <linux/compiler.h> +#include <linux/kexec.h> +#include <linux/mm.h> +#include <linux/delay.h> + +#include <asm/cacheflush.h> +#include <asm/page.h> +#include <asm/setup.h> + +extern const unsigned char relocate_new_kernel[]; +extern const size_t relocate_new_kernel_size; + +int machine_kexec_prepare(struct kimage *kimage) +{ + return 0; +} + +void machine_kexec_cleanup(struct kimage *kimage) +{ +} + +void machine_shutdown(void) +{ +} + +void machine_crash_shutdown(struct pt_regs *regs) +{ +} + +typedef void (*relocate_kernel_t)(unsigned long ptr, + unsigned long start, + unsigned long cpu_mmu_flags) __noreturn; + +void machine_kexec(struct kimage *image) +{ + void *reboot_code_buffer; + unsigned long cpu_mmu_flags; + + reboot_code_buffer = page_address(image->control_code_page); + + memcpy(reboot_code_buffer, relocate_new_kernel, + relocate_new_kernel_size); + + /* + * we do not want to be bothered. + */ + local_irq_disable(); + + pr_info("Will call new kernel at 0x%08lx. Bye...\n", image->start); + __flush_cache_all(); + cpu_mmu_flags = m68k_cputype | m68k_mmutype << 8; + ((relocate_kernel_t) reboot_code_buffer)(image->head & PAGE_MASK, + image->start, + cpu_mmu_flags); +} |