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| author | Sergey Bugaev <bugaevc@gmail.com> | 2024-01-03 20:14:45 +0300 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2024-01-04 23:48:54 +0100 |
| commit | 520b1df08de68a3de328b65a25b86300a7ddf512 (patch) | |
| tree | ba93eb68a925b333f64ec593518aca0658b96f05 /sysdeps/aarch64/cpu-features.h | |
| parent | fbfe0b20ab82550de65827e70aa89d8ae462b34d (diff) | |
| download | glibc-520b1df08de68a3de328b65a25b86300a7ddf512.zip glibc-520b1df08de68a3de328b65a25b86300a7ddf512.tar.gz glibc-520b1df08de68a3de328b65a25b86300a7ddf512.tar.bz2 | |
aarch64: Make cpu-features definitions not Linux-specific
These describe generic AArch64 CPU features, and are not tied to a
kernel-specific way of determining them. We can share them between
the Linux and Hurd AArch64 ports.
Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
Message-ID: <20240103171502.1358371-13-bugaevc@gmail.com>
Diffstat (limited to 'sysdeps/aarch64/cpu-features.h')
| -rw-r--r-- | sysdeps/aarch64/cpu-features.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/sysdeps/aarch64/cpu-features.h b/sysdeps/aarch64/cpu-features.h new file mode 100644 index 0000000..77a78242 --- /dev/null +++ b/sysdeps/aarch64/cpu-features.h @@ -0,0 +1,77 @@ +/* Initialize CPU feature data. AArch64 version. + This file is part of the GNU C Library. + Copyright (C) 2017-2024 Free Software Foundation, Inc. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +#ifndef _CPU_FEATURES_AARCH64_H +#define _CPU_FEATURES_AARCH64_H + +#include <stdint.h> +#include <stdbool.h> + +#define MIDR_PARTNUM_SHIFT 4 +#define MIDR_PARTNUM_MASK (0xfff << MIDR_PARTNUM_SHIFT) +#define MIDR_PARTNUM(midr) \ + (((midr) & MIDR_PARTNUM_MASK) >> MIDR_PARTNUM_SHIFT) +#define MIDR_ARCHITECTURE_SHIFT 16 +#define MIDR_ARCHITECTURE_MASK (0xf << MIDR_ARCHITECTURE_SHIFT) +#define MIDR_ARCHITECTURE(midr) \ + (((midr) & MIDR_ARCHITECTURE_MASK) >> MIDR_ARCHITECTURE_SHIFT) +#define MIDR_VARIANT_SHIFT 20 +#define MIDR_VARIANT_MASK (0xf << MIDR_VARIANT_SHIFT) +#define MIDR_VARIANT(midr) \ + (((midr) & MIDR_VARIANT_MASK) >> MIDR_VARIANT_SHIFT) +#define MIDR_IMPLEMENTOR_SHIFT 24 +#define MIDR_IMPLEMENTOR_MASK (0xff << MIDR_IMPLEMENTOR_SHIFT) +#define MIDR_IMPLEMENTOR(midr) \ + (((midr) & MIDR_IMPLEMENTOR_MASK) >> MIDR_IMPLEMENTOR_SHIFT) + +#define IS_THUNDERX(midr) (MIDR_IMPLEMENTOR(midr) == 'C' \ + && MIDR_PARTNUM(midr) == 0x0a1) + +#define IS_THUNDERX2PA(midr) (MIDR_IMPLEMENTOR(midr) == 'B' \ + && MIDR_PARTNUM(midr) == 0x516) +#define IS_THUNDERX2(midr) (MIDR_IMPLEMENTOR(midr) == 'C' \ + && MIDR_PARTNUM(midr) == 0xaf) + +#define IS_NEOVERSE_N1(midr) (MIDR_IMPLEMENTOR(midr) == 'A' \ + && MIDR_PARTNUM(midr) == 0xd0c) +#define IS_NEOVERSE_N2(midr) (MIDR_IMPLEMENTOR(midr) == 'A' \ + && MIDR_PARTNUM(midr) == 0xd49) +#define IS_NEOVERSE_V1(midr) (MIDR_IMPLEMENTOR(midr) == 'A' \ + && MIDR_PARTNUM(midr) == 0xd40) + +#define IS_EMAG(midr) (MIDR_IMPLEMENTOR(midr) == 'P' \ + && MIDR_PARTNUM(midr) == 0x000) + +#define IS_KUNPENG920(midr) (MIDR_IMPLEMENTOR(midr) == 'H' \ + && MIDR_PARTNUM(midr) == 0xd01) + +#define IS_A64FX(midr) (MIDR_IMPLEMENTOR(midr) == 'F' \ + && MIDR_PARTNUM(midr) == 0x001) + +struct cpu_features +{ + uint64_t midr_el1; + unsigned zva_size; + bool bti; + /* Currently, the GLIBC memory tagging tunable only defines 8 bits. */ + uint8_t mte_state; + bool sve; + bool mops; +}; + +#endif /* _CPU_FEATURES_AARCH64_H */ |