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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 | ||
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10 | #include <linux/device.h> |
11 | #include <linux/mm.h> | |
12 | #include <linux/kexec.h> | |
13 | #include <linux/delay.h> | |
a386fba2 HC |
14 | #include <asm/cio.h> |
15 | #include <asm/setup.h> | |
cf13f0ea HC |
16 | #include <asm/pgtable.h> |
17 | #include <asm/pgalloc.h> | |
18 | #include <asm/system.h> | |
a386fba2 | 19 | #include <asm/smp.h> |
15e9b586 | 20 | #include <asm/reset.h> |
cf13f0ea | 21 | |
c6b5b847 | 22 | typedef void (*relocate_kernel_t)(kimage_entry_t *, unsigned long); |
cf13f0ea | 23 | |
2efe55a9 TK |
24 | extern const unsigned char relocate_kernel[]; |
25 | extern const unsigned long long relocate_kernel_len; | |
cf13f0ea | 26 | |
c6b5b847 | 27 | int machine_kexec_prepare(struct kimage *image) |
cf13f0ea | 28 | { |
c6b5b847 | 29 | void *reboot_code_buffer; |
cf13f0ea HC |
30 | |
31 | /* We don't support anything but the default image type for now. */ | |
32 | if (image->type != KEXEC_TYPE_DEFAULT) | |
33 | return -EINVAL; | |
34 | ||
35 | /* Get the destination where the assembler code should be copied to.*/ | |
c6b5b847 | 36 | reboot_code_buffer = (void *) page_to_phys(image->control_code_page); |
cf13f0ea HC |
37 | |
38 | /* Then copy it */ | |
c6b5b847 | 39 | memcpy(reboot_code_buffer, relocate_kernel, relocate_kernel_len); |
cf13f0ea HC |
40 | return 0; |
41 | } | |
42 | ||
c6b5b847 | 43 | void machine_kexec_cleanup(struct kimage *image) |
cf13f0ea HC |
44 | { |
45 | } | |
46 | ||
c6b5b847 | 47 | void machine_shutdown(void) |
cf13f0ea HC |
48 | { |
49 | printk(KERN_INFO "kexec: machine_shutdown called\n"); | |
50 | } | |
51 | ||
5d3f229f HC |
52 | extern void pfault_fini(void); |
53 | ||
c6b5b847 | 54 | void machine_kexec(struct kimage *image) |
cf13f0ea | 55 | { |
cf13f0ea HC |
56 | relocate_kernel_t data_mover; |
57 | ||
c6b5b847 | 58 | preempt_disable(); |
5d3f229f HC |
59 | #ifdef CONFIG_PFAULT |
60 | if (MACHINE_IS_VM) | |
61 | pfault_fini(); | |
62 | #endif | |
c6b5b847 | 63 | smp_send_stop(); |
15e9b586 HC |
64 | s390_reset_system(); |
65 | ||
c6b5b847 | 66 | data_mover = (relocate_kernel_t) page_to_phys(image->control_code_page); |
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67 | |
68 | /* Call the moving routine */ | |
c6b5b847 HC |
69 | (*data_mover)(&image->head, image->start); |
70 | for (;;); | |
cf13f0ea | 71 | } |