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