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