1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _PPC64_KDUMP_H 3 #define _PPC64_KDUMP_H 4 5 #include <asm/page.h> 6 7 #define KDUMP_KERNELBASE 0x2000000 8 9 /* How many bytes to reserve at zero for kdump. The reserve limit should 10 * be greater or equal to the trampoline's end address. 11 * Reserve to the end of the FWNMI area, see head_64.S */ 12 #define KDUMP_RESERVE_LIMIT 0x10000 /* 64K */ 13 14 #ifdef CONFIG_CRASH_DUMP 15 16 /* 17 * On PPC64 translation is disabled during trampoline setup, so we use 18 * physical addresses. Though on PPC32 translation is already enabled, 19 * so we can't do the same. Luckily create_trampoline() creates relative 20 * branches, so we can just add the PAGE_OFFSET and don't worry about it. 21 */ 22 #ifdef __powerpc64__ 23 #define KDUMP_TRAMPOLINE_START 0x0100 24 #define KDUMP_TRAMPOLINE_END 0x3000 25 #else 26 #define KDUMP_TRAMPOLINE_START (0x0100 + PAGE_OFFSET) 27 #define KDUMP_TRAMPOLINE_END (0x3000 + PAGE_OFFSET) 28 #endif /* __powerpc64__ */ 29 30 #define KDUMP_MIN_TCE_ENTRIES 2048 31 32 #endif /* CONFIG_CRASH_DUMP */ 33 34 #ifndef __ASSEMBLY__ 35 36 #if defined(CONFIG_CRASH_DUMP) && !defined(CONFIG_NONSTATIC_KERNEL) 37 extern void reserve_kdump_trampoline(void); 38 extern void setup_kdump_trampoline(void); 39 #else 40 /* !CRASH_DUMP || !NONSTATIC_KERNEL */ 41 static inline void reserve_kdump_trampoline(void) { ; } 42 static inline void setup_kdump_trampoline(void) { ; } 43 #endif 44 45 #endif /* __ASSEMBLY__ */ 46 47 #endif /* __PPC64_KDUMP_H */ 48