projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 583bb86f NS |
1 | /* |
| 2 | * machine_kexec.c for kexec | |
| 3 | * Created by <[email protected]> on Thu Oct 12 15:15:06 2006 | |
| 4 | * | |
| 5 | * This source code is licensed under the GNU General Public License, | |
| 6 | * Version 2. See the file COPYING for more details. | |
| 7 | */ | |
| 8 | ||
| 9 | #include <linux/kexec.h> | |
| 10 | #include <linux/mm.h> | |
| 11 | #include <linux/delay.h> | |
| 12 | ||
| 13 | #include <asm/cacheflush.h> | |
| 14 | #include <asm/page.h> | |
| 15 | ||
| 16 | const extern unsigned char relocate_new_kernel[]; | |
| 17 | const extern unsigned int relocate_new_kernel_size; | |
| 18 | ||
| 19 | extern unsigned long kexec_start_address; | |
| 20 | extern unsigned long kexec_indirection_page; | |
| 21 | ||
| 22 | int | |
| 23 | machine_kexec_prepare(struct kimage *kimage) | |
| 24 | { | |
| 25 | return 0; | |
| 26 | } | |
| 27 | ||
| 28 | void | |
| 29 | machine_kexec_cleanup(struct kimage *kimage) | |
| 30 | { | |
| 31 | } | |
| 32 | ||
| 33 | void | |
| 34 | machine_shutdown(void) | |
| 35 | { | |
| 36 | } | |
| 37 | ||
| 38 | void | |
| 39 | machine_crash_shutdown(struct pt_regs *regs) | |
| 40 | { | |
| 41 | } | |
| 42 | ||
| 43 | void | |
| 44 | machine_kexec(struct kimage *image) | |
| 45 | { | |
| 46 | unsigned long reboot_code_buffer; | |
| 47 | unsigned long entry; | |
| 48 | unsigned long *ptr; | |
| 49 | ||
| 50 | reboot_code_buffer = | |
| 51 | (unsigned long)page_address(image->control_code_page); | |
| 52 | ||
| 53 | kexec_start_address = image->start; | |
| 54 | kexec_indirection_page = phys_to_virt(image->head & PAGE_MASK); | |
| 55 | ||
| 56 | memcpy((void*)reboot_code_buffer, relocate_new_kernel, | |
| 57 | relocate_new_kernel_size); | |
| 58 | ||
| 59 | /* | |
| 60 | * The generic kexec code builds a page list with physical | |
| 61 | * addresses. they are directly accessible through KSEG0 (or | |
| 62 | * CKSEG0 or XPHYS if on 64bit system), hence the | |
| 63 | * pys_to_virt() call. | |
| 64 | */ | |
| 65 | for (ptr = &image->head; (entry = *ptr) && !(entry &IND_DONE); | |
| 66 | ptr = (entry & IND_INDIRECTION) ? | |
| 67 | phys_to_virt(entry & PAGE_MASK) : ptr + 1) { | |
| 68 | if (*ptr & IND_SOURCE || *ptr & IND_INDIRECTION || | |
| 69 | *ptr & IND_DESTINATION) | |
| 70 | *ptr = phys_to_virt(*ptr); | |
| 71 | } | |
| 72 | ||
| 73 | /* | |
| 74 | * we do not want to be bothered. | |
| 75 | */ | |
| 76 | local_irq_disable(); | |
| 77 | ||
| 78 | flush_icache_range(reboot_code_buffer, | |
| 79 | reboot_code_buffer + KEXEC_CONTROL_CODE_SIZE); | |
| 80 | ||
| 81 | printk("Will call new kernel at %08x\n", image->start); | |
| 82 | printk("Bye ...\n"); | |
| 83 | flush_cache_all(); | |
| 84 | ((void (*)(void))reboot_code_buffer)(); | |
| 85 | } |