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