1#ifndef _PPC64_KDUMP_H 2#define _PPC64_KDUMP_H 3 4#include <asm/page.h> 5 6/* 7 * If CONFIG_RELOCATABLE is enabled we can place the kdump kernel anywhere. 8 * To keep enough space in the RMO for the first stage kernel on 64bit, we 9 * place it at 64MB. If CONFIG_RELOCATABLE is not enabled we must place 10 * the second stage at 32MB. 11 */ 12#if defined(CONFIG_RELOCATABLE) && defined(CONFIG_PPC64) 13#define KDUMP_KERNELBASE 0x4000000 14#else 15#define KDUMP_KERNELBASE 0x2000000 16#endif 17 18/* How many bytes to reserve at zero for kdump. The reserve limit should 19 * be greater or equal to the trampoline's end address. 20 * Reserve to the end of the FWNMI area, see head_64.S */ 21#define KDUMP_RESERVE_LIMIT 0x10000 /* 64K */ 22 23#ifdef CONFIG_CRASH_DUMP 24 25/* 26 * On PPC64 translation is disabled during trampoline setup, so we use 27 * physical addresses. Though on PPC32 translation is already enabled, 28 * so we can't do the same. Luckily create_trampoline() creates relative 29 * branches, so we can just add the PAGE_OFFSET and don't worry about it. 30 */ 31#ifdef __powerpc64__ 32#define KDUMP_TRAMPOLINE_START 0x0100 33#define KDUMP_TRAMPOLINE_END 0x3000 34#else 35#define KDUMP_TRAMPOLINE_START (0x0100 + PAGE_OFFSET) 36#define KDUMP_TRAMPOLINE_END (0x3000 + PAGE_OFFSET) 37#endif /* __powerpc64__ */ 38 39#define KDUMP_MIN_TCE_ENTRIES 2048 40 41#endif /* CONFIG_CRASH_DUMP */ 42 43#ifndef __ASSEMBLY__ 44 45#if defined(CONFIG_CRASH_DUMP) && !defined(CONFIG_RELOCATABLE) 46extern void reserve_kdump_trampoline(void); 47extern void setup_kdump_trampoline(void); 48#else 49/* !CRASH_DUMP || RELOCATABLE */ 50static inline void reserve_kdump_trampoline(void) { ; } 51static inline void setup_kdump_trampoline(void) { ; } 52#endif 53 54#endif /* __ASSEMBLY__ */ 55 56#endif /* __PPC64_KDUMP_H */ 57