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// 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 <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);
}
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