1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef _PPC64_KDUMP_H 3*4882a593Smuzhiyun #define _PPC64_KDUMP_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #include <asm/page.h> 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun #define KDUMP_KERNELBASE 0x2000000 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun /* How many bytes to reserve at zero for kdump. The reserve limit should 10*4882a593Smuzhiyun * be greater or equal to the trampoline's end address. 11*4882a593Smuzhiyun * Reserve to the end of the FWNMI area, see head_64.S */ 12*4882a593Smuzhiyun #define KDUMP_RESERVE_LIMIT 0x10000 /* 64K */ 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun #ifdef CONFIG_CRASH_DUMP 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun /* 17*4882a593Smuzhiyun * On PPC64 translation is disabled during trampoline setup, so we use 18*4882a593Smuzhiyun * physical addresses. Though on PPC32 translation is already enabled, 19*4882a593Smuzhiyun * so we can't do the same. Luckily create_trampoline() creates relative 20*4882a593Smuzhiyun * branches, so we can just add the PAGE_OFFSET and don't worry about it. 21*4882a593Smuzhiyun */ 22*4882a593Smuzhiyun #ifdef __powerpc64__ 23*4882a593Smuzhiyun #define KDUMP_TRAMPOLINE_START 0x0100 24*4882a593Smuzhiyun #define KDUMP_TRAMPOLINE_END 0x3000 25*4882a593Smuzhiyun #else 26*4882a593Smuzhiyun #define KDUMP_TRAMPOLINE_START (0x0100 + PAGE_OFFSET) 27*4882a593Smuzhiyun #define KDUMP_TRAMPOLINE_END (0x3000 + PAGE_OFFSET) 28*4882a593Smuzhiyun #endif /* __powerpc64__ */ 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun #define KDUMP_MIN_TCE_ENTRIES 2048 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun #endif /* CONFIG_CRASH_DUMP */ 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun #ifndef __ASSEMBLY__ 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun #if defined(CONFIG_CRASH_DUMP) && !defined(CONFIG_NONSTATIC_KERNEL) 37*4882a593Smuzhiyun extern void reserve_kdump_trampoline(void); 38*4882a593Smuzhiyun extern void setup_kdump_trampoline(void); 39*4882a593Smuzhiyun #else 40*4882a593Smuzhiyun /* !CRASH_DUMP || !NONSTATIC_KERNEL */ reserve_kdump_trampoline(void)41*4882a593Smuzhiyunstatic inline void reserve_kdump_trampoline(void) { ; } setup_kdump_trampoline(void)42*4882a593Smuzhiyunstatic inline void setup_kdump_trampoline(void) { ; } 43*4882a593Smuzhiyun #endif 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun #endif /* __ASSEMBLY__ */ 46*4882a593Smuzhiyun 47*4882a593Smuzhiyun #endif /* __PPC64_KDUMP_H */ 48