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Linux kernel mirror (for testing)
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linux
1/*
2 * include/asm-s390/kexec.h
3 *
4 * (C) Copyright IBM Corp. 2005
5 *
6 * Author(s): Rolf Adelsberger <adelsberger@de.ibm.com>
7 *
8 */
9
10#ifndef _S390_KEXEC_H
11#define _S390_KEXEC_H
12
13#ifdef __KERNEL__
14#include <asm/page.h>
15#endif
16#include <asm/processor.h>
17/*
18 * KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
19 * I.e. Maximum page that is mapped directly into kernel memory,
20 * and kmap is not required.
21 */
22
23/* Maximum physical address we can use pages from */
24#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
25
26/* Maximum address we can reach in physical address mode */
27#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
28
29/* Maximum address we can use for the control pages */
30/* Not more than 2GB */
31#define KEXEC_CONTROL_MEMORY_LIMIT (1UL<<31)
32
33/* Maximum address we can use for the crash control pages */
34#define KEXEC_CRASH_CONTROL_MEMORY_LIMIT (-1UL)
35
36/* Allocate one page for the pdp and the second for the code */
37#define KEXEC_CONTROL_PAGE_SIZE 4096
38
39/* Alignment of crashkernel memory */
40#define KEXEC_CRASH_MEM_ALIGN HPAGE_SIZE
41
42/* The native architecture */
43#define KEXEC_ARCH KEXEC_ARCH_S390
44
45/*
46 * Size for s390x ELF notes per CPU
47 *
48 * Seven notes plus zero note at the end: prstatus, fpregset, timer,
49 * tod_cmp, tod_reg, control regs, and prefix
50 */
51#define KEXEC_NOTE_BYTES \
52 (ALIGN(sizeof(struct elf_note), 4) * 8 + \
53 ALIGN(sizeof("CORE"), 4) * 7 + \
54 ALIGN(sizeof(struct elf_prstatus), 4) + \
55 ALIGN(sizeof(elf_fpregset_t), 4) + \
56 ALIGN(sizeof(u64), 4) + \
57 ALIGN(sizeof(u64), 4) + \
58 ALIGN(sizeof(u32), 4) + \
59 ALIGN(sizeof(u64) * 16, 4) + \
60 ALIGN(sizeof(u32), 4) \
61 )
62
63/* Provide a dummy definition to avoid build failures. */
64static inline void crash_setup_regs(struct pt_regs *newregs,
65 struct pt_regs *oldregs) { }
66
67#endif /*_S390_KEXEC_H */