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59 lines
1.3 KiB
59 lines
1.3 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* machine_kexec.c - handle transition of Linux booting another kernel |
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*/ |
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#include <linux/compiler.h> |
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#include <linux/kexec.h> |
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#include <linux/mm.h> |
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#include <linux/delay.h> |
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#include <asm/cacheflush.h> |
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#include <asm/page.h> |
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#include <asm/setup.h> |
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extern const unsigned char relocate_new_kernel[]; |
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extern const size_t relocate_new_kernel_size; |
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int machine_kexec_prepare(struct kimage *kimage) |
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{ |
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return 0; |
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} |
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void machine_kexec_cleanup(struct kimage *kimage) |
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{ |
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} |
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void machine_shutdown(void) |
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{ |
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} |
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void machine_crash_shutdown(struct pt_regs *regs) |
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{ |
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} |
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typedef void (*relocate_kernel_t)(unsigned long ptr, |
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unsigned long start, |
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unsigned long cpu_mmu_flags) __noreturn; |
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void machine_kexec(struct kimage *image) |
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{ |
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void *reboot_code_buffer; |
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unsigned long cpu_mmu_flags; |
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reboot_code_buffer = page_address(image->control_code_page); |
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memcpy(reboot_code_buffer, relocate_new_kernel, |
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relocate_new_kernel_size); |
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/* |
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* we do not want to be bothered. |
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*/ |
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local_irq_disable(); |
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pr_info("Will call new kernel at 0x%08lx. Bye...\n", image->start); |
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__flush_cache_all(); |
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cpu_mmu_flags = m68k_cputype | m68k_mmutype << 8; |
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((relocate_kernel_t) reboot_code_buffer)(image->head & PAGE_MASK, |
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image->start, |
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cpu_mmu_flags); |
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}
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