projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 583bb86f NS |
1 | /* |
| 2 | * machine_kexec.c for kexec | |
| 3 | * Created by <nschichan@corp.free.fr> 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 | ||
| c5a69d57 | 16 | extern const unsigned char relocate_new_kernel[]; |
| 1065932f | 17 | extern const size_t relocate_new_kernel_size; |
| 583bb86f NS |
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 | ||
| 1065932f RB |
43 | typedef void (*noretfun_t)(void) __attribute__((noreturn)); |
| 44 | ||
| 583bb86f NS |
45 | void |
| 46 | machine_kexec(struct kimage *image) | |
| 47 | { | |
| 48 | unsigned long reboot_code_buffer; | |
| 49 | unsigned long entry; | |
| 50 | unsigned long *ptr; | |
| 51 | ||
| 52 | reboot_code_buffer = | |
| 53 | (unsigned long)page_address(image->control_code_page); | |
| 54 | ||
| 55 | kexec_start_address = image->start; | |
| 1065932f RB |
56 | kexec_indirection_page = |
| 57 | (unsigned long) phys_to_virt(image->head & PAGE_MASK); | |
| 583bb86f NS |
58 | |
| 59 | memcpy((void*)reboot_code_buffer, relocate_new_kernel, | |
| 60 | relocate_new_kernel_size); | |
| 61 | ||
| 62 | /* | |
| 63 | * The generic kexec code builds a page list with physical | |
| 64 | * addresses. they are directly accessible through KSEG0 (or | |
| 65 | * CKSEG0 or XPHYS if on 64bit system), hence the | |
| 66 | * pys_to_virt() call. | |
| 67 | */ | |
| 68 | for (ptr = &image->head; (entry = *ptr) && !(entry &IND_DONE); | |
| 69 | ptr = (entry & IND_INDIRECTION) ? | |
| 70 | phys_to_virt(entry & PAGE_MASK) : ptr + 1) { | |
| 71 | if (*ptr & IND_SOURCE || *ptr & IND_INDIRECTION || | |
| 72 | *ptr & IND_DESTINATION) | |
| 1065932f | 73 | *ptr = (unsigned long) phys_to_virt(*ptr); |
| 583bb86f NS |
74 | } |
| 75 | ||
| 76 | /* | |
| 77 | * we do not want to be bothered. | |
| 78 | */ | |
| 79 | local_irq_disable(); | |
| 80 | ||
| 1065932f | 81 | printk("Will call new kernel at %08lx\n", image->start); |
| 583bb86f | 82 | printk("Bye ...\n"); |
| 97ce9a8d | 83 | __flush_cache_all(); |
| 1065932f | 84 | ((noretfun_t) reboot_code_buffer)(); |
| 583bb86f | 85 | } |