2 * arch/s390/kernel/machine_kexec.c
4 * Copyright IBM Corp. 2005,2006
6 * Author(s): Rolf Adelsberger,
7 * Heiko Carstens <heiko.carstens@de.ibm.com>
10 #include <linux/device.h>
12 #include <linux/kexec.h>
13 #include <linux/delay.h>
14 #include <linux/reboot.h>
16 #include <asm/setup.h>
17 #include <asm/pgtable.h>
18 #include <asm/pgalloc.h>
19 #include <asm/system.h>
21 #include <asm/reset.h>
24 typedef void (*relocate_kernel_t)(kimage_entry_t *, unsigned long);
26 extern const unsigned char relocate_kernel[];
27 extern const unsigned long long relocate_kernel_len;
29 int machine_kexec_prepare(struct kimage *image)
31 void *reboot_code_buffer;
33 /* Can't replace kernel image since it is read-only. */
34 if (ipl_flags & IPL_NSS_VALID)
37 /* We don't support anything but the default image type for now. */
38 if (image->type != KEXEC_TYPE_DEFAULT)
41 /* Get the destination where the assembler code should be copied to.*/
42 reboot_code_buffer = (void *) page_to_phys(image->control_code_page);
45 memcpy(reboot_code_buffer, relocate_kernel, relocate_kernel_len);
49 void machine_kexec_cleanup(struct kimage *image)
53 void machine_shutdown(void)
55 printk(KERN_INFO "kexec: machine_shutdown called\n");
58 void machine_kexec(struct kimage *image)
60 relocate_kernel_t data_mover;
66 data_mover = (relocate_kernel_t) page_to_phys(image->control_code_page);
68 /* Call the moving routine */
69 (*data_mover)(&image->head, image->start);