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) 46 extern void reserve_kdump_trampoline(void); 47 extern void setup_kdump_trampoline(void); 48 #else 49 /* !CRASH_DUMP || RELOCATABLE */ 50 static inline void reserve_kdump_trampoline(void) { ; } 51 static inline void setup_kdump_trampoline(void) { ; } 52 #endif 53 54 #endif /* __ASSEMBLY__ */ 55 56 #endif /* __PPC64_KDUMP_H */ 57