Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
// 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 <linux/reboot.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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