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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _PPC64_KDUMP_H
#define _PPC64_KDUMP_H
#include <asm/page.h>
#define KDUMP_KERNELBASE 0x2000000
/* How many bytes to reserve at zero for kdump. The reserve limit should
* be greater or equal to the trampoline's end address.
* Reserve to the end of the FWNMI area, see head_64.S */
#define KDUMP_RESERVE_LIMIT 0x10000 /* 64K */
#ifdef CONFIG_CRASH_DUMP
/*
* On PPC64 translation is disabled during trampoline setup, so we use
* physical addresses. Though on PPC32 translation is already enabled,
* so we can't do the same. Luckily create_trampoline() creates relative
* branches, so we can just add the PAGE_OFFSET and don't worry about it.
*/
#ifdef __powerpc64__
#define KDUMP_TRAMPOLINE_START 0x0100
#define KDUMP_TRAMPOLINE_END 0x3000
#else
#define KDUMP_TRAMPOLINE_START (0x0100 + PAGE_OFFSET)
#define KDUMP_TRAMPOLINE_END (0x3000 + PAGE_OFFSET)
#endif /* __powerpc64__ */
#define KDUMP_MIN_TCE_ENTRIES 2048
#endif /* CONFIG_CRASH_DUMP */
#ifndef __ASSEMBLY__
#if defined(CONFIG_CRASH_DUMP) && !defined(CONFIG_NONSTATIC_KERNEL)
extern void reserve_kdump_trampoline(void);
extern void setup_kdump_trampoline(void);
#else
/* !CRASH_DUMP || !NONSTATIC_KERNEL */
static inline void reserve_kdump_trampoline(void) { ; }
static inline void setup_kdump_trampoline(void) { ; }
#endif
#endif /* __ASSEMBLY__ */
#endif /* __PPC64_KDUMP_H */