56 lines
1.8 KiB
C
56 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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#ifndef _ASM_POWERPC_AUXVEC_H
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#define _ASM_POWERPC_AUXVEC_H
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/*
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* We need to put in some extra aux table entries to tell glibc what
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* the cache block size is, so it can use the dcbz instruction safely.
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*/
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#define AT_DCACHEBSIZE 19
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#define AT_ICACHEBSIZE 20
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#define AT_UCACHEBSIZE 21
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/* A special ignored type value for PPC, for glibc compatibility. */
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#define AT_IGNOREPPC 22
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/* The vDSO location. We have to use the same value as x86 for glibc's
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* sake :-)
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*/
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#define AT_SYSINFO_EHDR 33
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/*
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* AT_*CACHEBSIZE above represent the cache *block* size which is
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* the size that is affected by the cache management instructions.
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*
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* It doesn't nececssarily matches the cache *line* size which is
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* more of a performance tuning hint. Additionally the latter can
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* be different for the different cache levels.
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*
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* The set of entries below represent more extensive information
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* about the caches, in the form of two entry per cache type,
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* one entry containing the cache size in bytes, and the other
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* containing the cache line size in bytes in the bottom 16 bits
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* and the cache associativity in the next 16 bits.
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*
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* The associativity is such that if N is the 16-bit value, the
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* cache is N way set associative. A value if 0xffff means fully
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* associative, a value of 1 means directly mapped.
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*
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* For all these fields, a value of 0 means that the information
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* is not known.
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*/
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#define AT_L1I_CACHESIZE 40
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#define AT_L1I_CACHEGEOMETRY 41
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#define AT_L1D_CACHESIZE 42
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#define AT_L1D_CACHEGEOMETRY 43
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#define AT_L2_CACHESIZE 44
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#define AT_L2_CACHEGEOMETRY 45
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#define AT_L3_CACHESIZE 46
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#define AT_L3_CACHEGEOMETRY 47
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#define AT_MINSIGSTKSZ 51 /* stack needed for signal delivery */
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#define AT_VECTOR_SIZE_ARCH 15 /* entries in ARCH_DLINFO */
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#endif
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