Nicolas Schichan | 583bb86 | 2006-10-18 15:14:55 +0200 | [diff] [blame] | 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 | |
Tobias Klauser | c5a69d5 | 2007-02-17 20:11:19 +0100 | [diff] [blame] | 16 | extern const unsigned char relocate_new_kernel[]; |
Ralf Baechle | 1065932 | 2007-07-31 15:16:32 +0100 | [diff] [blame] | 17 | extern const size_t relocate_new_kernel_size; |
Nicolas Schichan | 583bb86 | 2006-10-18 15:14:55 +0200 | [diff] [blame] | 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 | |
Ralf Baechle | 1065932 | 2007-07-31 15:16:32 +0100 | [diff] [blame] | 43 | typedef void (*noretfun_t)(void) __attribute__((noreturn)); |
| 44 | |
Nicolas Schichan | 583bb86 | 2006-10-18 15:14:55 +0200 | [diff] [blame] | 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; |
Ralf Baechle | 1065932 | 2007-07-31 15:16:32 +0100 | [diff] [blame] | 56 | kexec_indirection_page = |
| 57 | (unsigned long) phys_to_virt(image->head & PAGE_MASK); |
Nicolas Schichan | 583bb86 | 2006-10-18 15:14:55 +0200 | [diff] [blame] | 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) |
Ralf Baechle | 1065932 | 2007-07-31 15:16:32 +0100 | [diff] [blame] | 73 | *ptr = (unsigned long) phys_to_virt(*ptr); |
Nicolas Schichan | 583bb86 | 2006-10-18 15:14:55 +0200 | [diff] [blame] | 74 | } |
| 75 | |
| 76 | /* |
| 77 | * we do not want to be bothered. |
| 78 | */ |
| 79 | local_irq_disable(); |
| 80 | |
Ralf Baechle | 1065932 | 2007-07-31 15:16:32 +0100 | [diff] [blame] | 81 | printk("Will call new kernel at %08lx\n", image->start); |
Nicolas Schichan | 583bb86 | 2006-10-18 15:14:55 +0200 | [diff] [blame] | 82 | printk("Bye ...\n"); |
Nicolas Schichan | 97ce9a8 | 2007-08-20 15:57:38 +0200 | [diff] [blame] | 83 | __flush_cache_all(); |
Ralf Baechle | 1065932 | 2007-07-31 15:16:32 +0100 | [diff] [blame] | 84 | ((noretfun_t) reboot_code_buffer)(); |
Nicolas Schichan | 583bb86 | 2006-10-18 15:14:55 +0200 | [diff] [blame] | 85 | } |