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) 36 extern void reserve_kdump_trampoline(void); 37 extern void setup_kdump_trampoline(void); 38 #else 39 /* !CRASH_DUMP || !NONSTATIC_KERNEL */ 40 static inline void reserve_kdump_trampoline(void) { ; } 41 static inline void setup_kdump_trampoline(void) { ; } 42 #endif 43 44 #endif /* __ASSEMBLY__ */ 45 46 #endif /* __PPC64_KDUMP_H */ 47