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ee7f4c54e1
This patch adds a new feature for powerpc. In order to get faster
access to the HWCAP3/HWCAP4 masks, similar to HWCAP/HWCAP2 (i.e. for
implementing __builtin_cpu_supports() in GCC) without the overhead of
reading them from the auxiliary vector, we now reserve space for them
in the TCB.
Suggested-by: Peter Bergner <bergner@linux.ibm.com>
Reviewed-by: Peter Bergner <bergner@linux.ibm.com>
(cherry picked from commit 3ab9b88e2a)
133 lines
3.9 KiB
C
133 lines
3.9 KiB
C
/* Initialize cpu feature data. PowerPC version.
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Copyright (C) 2017-2024 Free Software Foundation, Inc.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef __CPU_FEATURES_POWERPC_H
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# define __CPU_FEATURES_POWERPC_H
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#include <stdbool.h>
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#include <sys/auxv.h>
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struct cpu_features
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{
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bool use_cached_memopt;
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unsigned long int hwcap;
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unsigned long int hwcap2;
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unsigned long int hwcap3;
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unsigned long int hwcap4;
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};
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static const char hwcap_names[] = {
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"4xxmac\0"
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"altivec\0"
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"arch_2_05\0"
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"arch_2_06\0"
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"archpmu\0"
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"booke\0"
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"cellbe\0"
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"dfp\0"
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"efpdouble\0"
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"efpsingle\0"
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"fpu\0"
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"ic_snoop\0"
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"mmu\0"
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"notb\0"
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"pa6t\0"
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"power4\0"
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"power5\0"
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"power5+\0"
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"power6x\0"
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"ppc32\0"
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"ppc601\0"
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"ppc64\0"
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"ppcle\0"
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"smt\0"
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"spe\0"
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"true_le\0"
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"ucache\0"
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"vsx\0"
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"arch_2_07\0"
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"dscr\0"
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"ebb\0"
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"htm\0"
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"htm-nosc\0"
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"htm-no-suspend\0"
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"isel\0"
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"tar\0"
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"vcrypto\0"
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"arch_3_00\0"
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"ieee128\0"
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"darn\0"
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"scv\0"
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"arch_3_1\0"
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"mma\0"
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};
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static const struct
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{
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unsigned int mask;
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bool id;
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} hwcap_tunables[] = {
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/* AT_HWCAP tunable masks. */
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{ PPC_FEATURE_HAS_4xxMAC, 0 },
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{ PPC_FEATURE_HAS_ALTIVEC, 0 },
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{ PPC_FEATURE_ARCH_2_05, 0 },
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{ PPC_FEATURE_ARCH_2_06, 0 },
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{ PPC_FEATURE_PSERIES_PERFMON_COMPAT, 0 },
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{ PPC_FEATURE_BOOKE, 0 },
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{ PPC_FEATURE_CELL_BE, 0 },
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{ PPC_FEATURE_HAS_DFP, 0 },
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{ PPC_FEATURE_HAS_EFP_DOUBLE, 0 },
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{ PPC_FEATURE_HAS_EFP_SINGLE, 0 },
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{ PPC_FEATURE_HAS_FPU, 0 },
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{ PPC_FEATURE_ICACHE_SNOOP, 0 },
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{ PPC_FEATURE_HAS_MMU, 0 },
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{ PPC_FEATURE_NO_TB, 0 },
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{ PPC_FEATURE_PA6T, 0 },
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{ PPC_FEATURE_POWER4, 0 },
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{ PPC_FEATURE_POWER5, 0 },
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{ PPC_FEATURE_POWER5_PLUS, 0 },
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{ PPC_FEATURE_POWER6_EXT, 0 },
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{ PPC_FEATURE_32, 0 },
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{ PPC_FEATURE_601_INSTR, 0 },
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{ PPC_FEATURE_64, 0 },
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{ PPC_FEATURE_PPC_LE, 0 },
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{ PPC_FEATURE_SMT, 0 },
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{ PPC_FEATURE_HAS_SPE, 0 },
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{ PPC_FEATURE_TRUE_LE, 0 },
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{ PPC_FEATURE_UNIFIED_CACHE, 0 },
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{ PPC_FEATURE_HAS_VSX, 0 },
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/* AT_HWCAP2 tunable masks. */
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{ PPC_FEATURE2_ARCH_2_07, 1 },
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{ PPC_FEATURE2_HAS_DSCR, 1 },
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{ PPC_FEATURE2_HAS_EBB, 1 },
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{ PPC_FEATURE2_HAS_HTM, 1 },
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{ PPC_FEATURE2_HTM_NOSC, 1 },
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{ PPC_FEATURE2_HTM_NO_SUSPEND, 1 },
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{ PPC_FEATURE2_HAS_ISEL, 1 },
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{ PPC_FEATURE2_HAS_TAR, 1 },
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{ PPC_FEATURE2_HAS_VEC_CRYPTO, 1 },
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{ PPC_FEATURE2_ARCH_3_00, 1 },
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{ PPC_FEATURE2_HAS_IEEE128, 1 },
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{ PPC_FEATURE2_DARN, 1 },
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{ PPC_FEATURE2_SCV, 1 },
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{ PPC_FEATURE2_ARCH_3_1, 1 },
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{ PPC_FEATURE2_MMA, 1 },
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};
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#endif /* __CPU_FEATURES_H */
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