// SPDX-License-Identifier: GPL-2.0 /* * 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 <linux/reboot.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); }