diff options
| author | Steve Ellcey <sellcey@caviumnetworks.com> | 2017-03-15 16:46:26 -0700 |
|---|---|---|
| committer | Steve Ellcey <sellcey@caviumnetworks.com> | 2017-03-15 16:46:26 -0700 |
| commit | d2e4346a30683cc42c57bd1bfd457897d78c6d7e (patch) | |
| tree | 3f6933eeba1b30fe0da795ca6cd7db50f792b55d /sysdeps/unix/sysv/linux/aarch64/cpu-features.h | |
| parent | fbe355fbd1973d6e29561084b3eaeb4bfe9d515a (diff) | |
| download | glibc-d2e4346a30683cc42c57bd1bfd457897d78c6d7e.tar.gz glibc-d2e4346a30683cc42c57bd1bfd457897d78c6d7e.tar.xz glibc-d2e4346a30683cc42c57bd1bfd457897d78c6d7e.zip | |
Add ifunc support for aarch64.
* sysdeps/aarch64/dl-machine.h: Include cpu-features.c. (DL_PLATFORM_INIT): New define. (dl_platform_init): New function. * sysdeps/aarch64/ldsodefs.h: Include cpu-features.h. * sysdeps/unix/sysv/linux/aarch64/cpu-features.c: New file. * sysdeps/unix/sysv/linux/aarch64/cpu-features.h: Likewise. * sysdeps/unix/sysv/linux/aarch64/dl-procinfo.c: Likewise. * sysdeps/unix/sysv/linux/aarch64/libc-start.c: Likewise.
Diffstat (limited to 'sysdeps/unix/sysv/linux/aarch64/cpu-features.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/aarch64/cpu-features.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/aarch64/cpu-features.h b/sysdeps/unix/sysv/linux/aarch64/cpu-features.h new file mode 100644 index 0000000000..c92b650984 --- /dev/null +++ b/sysdeps/unix/sysv/linux/aarch64/cpu-features.h @@ -0,0 +1,49 @@ +/* Initialize CPU feature data. AArch64 version. + This file is part of the GNU C Library. + Copyright (C) 2017 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 + <http://www.gnu.org/licenses/>. */ + +#ifndef _CPU_FEATURES_AARCH64_H +#define _CPU_FEATURES_AARCH64_H + +#include <stdint.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) + +struct cpu_features +{ + uint64_t midr_el1; +}; + +#endif /* _CPU_FEATURES_AARCH64_H */ |