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e269d269e0
This is required to generate proper core files using kdump on ppc64. Create a backup region of 64K size irrespective of the PAGE SIZE. At present 32K was used as backup size. In the case of 64K page size, second PT_LOAD segments starts at 32K and the first one is not page aligned. __ioremap() (crash_dump.c) fails if pfn = 0 which is the case for the second PT_LOAD segment. This is not an issue for 4K page size because the the first page (32K backup) is copied to second kernel memory and thus referencing with the second kernel pfn. Signed-off-by: Sachin Sant <sachinp@in.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
41 lines
1006 B
C
41 lines
1006 B
C
#ifndef _PPC64_KDUMP_H
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#define _PPC64_KDUMP_H
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/* Kdump kernel runs at 32 MB, change at your peril. */
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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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#define PHYSICAL_START KDUMP_KERNELBASE
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#define KDUMP_TRAMPOLINE_START 0x0100
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#define KDUMP_TRAMPOLINE_END 0x3000
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#define KDUMP_MIN_TCE_ENTRIES 2048
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#else /* !CONFIG_CRASH_DUMP */
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#define PHYSICAL_START 0x0
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#endif /* CONFIG_CRASH_DUMP */
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#ifndef __ASSEMBLY__
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#ifdef CONFIG_CRASH_DUMP
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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 /* !CONFIG_CRASH_DUMP */
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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 /* CONFIG_CRASH_DUMP */
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#endif /* __ASSEMBLY__ */
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#endif /* __PPC64_KDUMP_H */
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