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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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59 lines
1.2 KiB
C
59 lines
1.2 KiB
C
/*
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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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