1#ifndef _PPC64_KDUMP_H
2#define _PPC64_KDUMP_H
3
4#include <asm/page.h>
5
6#define KDUMP_KERNELBASE	0x2000000
7
8/* How many bytes to reserve at zero for kdump. The reserve limit should
9 * be greater or equal to the trampoline's end address.
10 * Reserve to the end of the FWNMI area, see head_64.S */
11#define KDUMP_RESERVE_LIMIT	0x10000 /* 64K */
12
13#ifdef CONFIG_CRASH_DUMP
14
15/*
16 * On PPC64 translation is disabled during trampoline setup, so we use
17 * physical addresses. Though on PPC32 translation is already enabled,
18 * so we can't do the same. Luckily create_trampoline() creates relative
19 * branches, so we can just add the PAGE_OFFSET and don't worry about it.
20 */
21#ifdef __powerpc64__
22#define KDUMP_TRAMPOLINE_START	0x0100
23#define KDUMP_TRAMPOLINE_END	0x3000
24#else
25#define KDUMP_TRAMPOLINE_START	(0x0100 + PAGE_OFFSET)
26#define KDUMP_TRAMPOLINE_END	(0x3000 + PAGE_OFFSET)
27#endif /* __powerpc64__ */
28
29#define KDUMP_MIN_TCE_ENTRIES	2048
30
31#endif /* CONFIG_CRASH_DUMP */
32
33#ifndef __ASSEMBLY__
34
35#if defined(CONFIG_CRASH_DUMP) && !defined(CONFIG_NONSTATIC_KERNEL)
36extern void reserve_kdump_trampoline(void);
37extern void setup_kdump_trampoline(void);
38#else
39/* !CRASH_DUMP || !NONSTATIC_KERNEL */
40static inline void reserve_kdump_trampoline(void) { ; }
41static inline void setup_kdump_trampoline(void) { ; }
42#endif
43
44#endif /* __ASSEMBLY__ */
45
46#endif /* __PPC64_KDUMP_H */
47