2 * machine_kexec.c for kexec
3 * Created by <nschichan@corp.free.fr> on Thu Oct 12 15:15:06 2006
5 * This source code is licensed under the GNU General Public License,
6 * Version 2. See the file COPYING for more details.
9 #include <linux/kexec.h>
11 #include <linux/delay.h>
13 #include <asm/cacheflush.h>
16 extern const unsigned char relocate_new_kernel[];
17 extern const size_t relocate_new_kernel_size;
19 extern unsigned long kexec_start_address;
20 extern unsigned long kexec_indirection_page;
23 machine_kexec_prepare(struct kimage *kimage)
29 machine_kexec_cleanup(struct kimage *kimage)
34 machine_shutdown(void)
39 machine_crash_shutdown(struct pt_regs *regs)
43 typedef void (*noretfun_t)(void) __attribute__((noreturn));
46 machine_kexec(struct kimage *image)
48 unsigned long reboot_code_buffer;
53 (unsigned long)page_address(image->control_code_page);
55 kexec_start_address = image->start;
56 kexec_indirection_page =
57 (unsigned long) phys_to_virt(image->head & PAGE_MASK);
59 memcpy((void*)reboot_code_buffer, relocate_new_kernel,
60 relocate_new_kernel_size);
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
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)
73 *ptr = (unsigned long) phys_to_virt(*ptr);
77 * we do not want to be bothered.
81 printk("Will call new kernel at %08lx\n", image->start);
84 ((noretfun_t) reboot_code_buffer)();