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