1 // SPDX-License-Identifier: GPL-2.0
3 * machine_kexec.c - handle transition of Linux booting another kernel
5 #include <linux/compiler.h>
6 #include <linux/kexec.h>
8 #include <linux/delay.h>
9 #include <linux/reboot.h>
11 #include <asm/cacheflush.h>
13 #include <asm/setup.h>
15 extern const unsigned char relocate_new_kernel[];
16 extern const size_t relocate_new_kernel_size;
18 int machine_kexec_prepare(struct kimage *kimage)
23 void machine_kexec_cleanup(struct kimage *kimage)
27 void machine_shutdown(void)
31 void machine_crash_shutdown(struct pt_regs *regs)
35 typedef void (*relocate_kernel_t)(unsigned long ptr,
37 unsigned long cpu_mmu_flags) __noreturn;
39 void machine_kexec(struct kimage *image)
41 void *reboot_code_buffer;
42 unsigned long cpu_mmu_flags;
44 reboot_code_buffer = page_address(image->control_code_page);
46 memcpy(reboot_code_buffer, relocate_new_kernel,
47 relocate_new_kernel_size);
50 * we do not want to be bothered.
54 pr_info("Will call new kernel at 0x%08lx. Bye...\n", image->start);
56 cpu_mmu_flags = m68k_cputype | m68k_mmutype << 8;
57 ((relocate_kernel_t) reboot_code_buffer)(image->head & PAGE_MASK,