]>
Commit | Line | Data |
---|---|---|
cf13f0ea HC |
1 | /* |
2 | * arch/s390/kernel/machine_kexec.c | |
3 | * | |
c6b5b847 | 4 | * Copyright IBM Corp. 2005,2006 |
cf13f0ea | 5 | * |
c6b5b847 HC |
6 | * Author(s): Rolf Adelsberger, |
7 | * Heiko Carstens <heiko.carstens@de.ibm.com> | |
cf13f0ea HC |
8 | */ |
9 | ||
cf13f0ea HC |
10 | #include <linux/device.h> |
11 | #include <linux/mm.h> | |
12 | #include <linux/kexec.h> | |
13 | #include <linux/delay.h> | |
2b67fc46 | 14 | #include <linux/reboot.h> |
a386fba2 HC |
15 | #include <asm/cio.h> |
16 | #include <asm/setup.h> | |
cf13f0ea HC |
17 | #include <asm/pgtable.h> |
18 | #include <asm/pgalloc.h> | |
19 | #include <asm/system.h> | |
a386fba2 | 20 | #include <asm/smp.h> |
15e9b586 | 21 | #include <asm/reset.h> |
cf13f0ea | 22 | |
c6b5b847 | 23 | typedef void (*relocate_kernel_t)(kimage_entry_t *, unsigned long); |
cf13f0ea | 24 | |
2efe55a9 TK |
25 | extern const unsigned char relocate_kernel[]; |
26 | extern const unsigned long long relocate_kernel_len; | |
cf13f0ea | 27 | |
c6b5b847 | 28 | int machine_kexec_prepare(struct kimage *image) |
cf13f0ea | 29 | { |
c6b5b847 | 30 | void *reboot_code_buffer; |
cf13f0ea HC |
31 | |
32 | /* We don't support anything but the default image type for now. */ | |
33 | if (image->type != KEXEC_TYPE_DEFAULT) | |
34 | return -EINVAL; | |
35 | ||
36 | /* Get the destination where the assembler code should be copied to.*/ | |
c6b5b847 | 37 | reboot_code_buffer = (void *) page_to_phys(image->control_code_page); |
cf13f0ea HC |
38 | |
39 | /* Then copy it */ | |
c6b5b847 | 40 | memcpy(reboot_code_buffer, relocate_kernel, relocate_kernel_len); |
cf13f0ea HC |
41 | return 0; |
42 | } | |
43 | ||
c6b5b847 | 44 | void machine_kexec_cleanup(struct kimage *image) |
cf13f0ea HC |
45 | { |
46 | } | |
47 | ||
c6b5b847 | 48 | void machine_shutdown(void) |
cf13f0ea HC |
49 | { |
50 | printk(KERN_INFO "kexec: machine_shutdown called\n"); | |
51 | } | |
52 | ||
c6b5b847 | 53 | void machine_kexec(struct kimage *image) |
cf13f0ea | 54 | { |
cf13f0ea HC |
55 | relocate_kernel_t data_mover; |
56 | ||
c6b5b847 | 57 | smp_send_stop(); |
29b08d2b | 58 | pfault_fini(); |
15e9b586 HC |
59 | s390_reset_system(); |
60 | ||
c6b5b847 | 61 | data_mover = (relocate_kernel_t) page_to_phys(image->control_code_page); |
cf13f0ea HC |
62 | |
63 | /* Call the moving routine */ | |
c6b5b847 HC |
64 | (*data_mover)(&image->head, image->start); |
65 | for (;;); | |
cf13f0ea | 66 | } |