projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
| 7d5f5fa2 GU |
2 | /* |
| 3 | * machine_kexec.c - handle transition of Linux booting another kernel | |
| 4 | */ | |
| 5 | #include <linux/compiler.h> | |
| 6 | #include <linux/kexec.h> | |
| 7 | #include <linux/mm.h> | |
| 8 | #include <linux/delay.h> | |
| 9 | ||
| 10 | #include <asm/cacheflush.h> | |
| 11 | #include <asm/page.h> | |
| 12 | #include <asm/setup.h> | |
| 13 | ||
| 14 | extern const unsigned char relocate_new_kernel[]; | |
| 15 | extern const size_t relocate_new_kernel_size; | |
| 16 | ||
| 17 | int machine_kexec_prepare(struct kimage *kimage) | |
| 18 | { | |
| 19 | return 0; | |
| 20 | } | |
| 21 | ||
| 22 | void machine_kexec_cleanup(struct kimage *kimage) | |
| 23 | { | |
| 24 | } | |
| 25 | ||
| 26 | void machine_shutdown(void) | |
| 27 | { | |
| 28 | } | |
| 29 | ||
| 30 | void machine_crash_shutdown(struct pt_regs *regs) | |
| 31 | { | |
| 32 | } | |
| 33 | ||
| 34 | typedef void (*relocate_kernel_t)(unsigned long ptr, | |
| 35 | unsigned long start, | |
| 36 | unsigned long cpu_mmu_flags) __noreturn; | |
| 37 | ||
| 38 | void machine_kexec(struct kimage *image) | |
| 39 | { | |
| 40 | void *reboot_code_buffer; | |
| 41 | unsigned long cpu_mmu_flags; | |
| 42 | ||
| 43 | reboot_code_buffer = page_address(image->control_code_page); | |
| 44 | ||
| 45 | memcpy(reboot_code_buffer, relocate_new_kernel, | |
| 46 | relocate_new_kernel_size); | |
| 47 | ||
| 48 | /* | |
| 49 | * we do not want to be bothered. | |
| 50 | */ | |
| 51 | local_irq_disable(); | |
| 52 | ||
| 53 | pr_info("Will call new kernel at 0x%08lx. Bye...\n", image->start); | |
| 54 | __flush_cache_all(); | |
| 55 | cpu_mmu_flags = m68k_cputype | m68k_mmutype << 8; | |
| 56 | ((relocate_kernel_t) reboot_code_buffer)(image->head & PAGE_MASK, | |
| 57 | image->start, | |
| 58 | cpu_mmu_flags); | |
| 59 | } |