diff options
Diffstat (limited to 'sysdeps/unix/sysv')
| -rw-r--r-- | sysdeps/unix/sysv/linux/aarch64/bits/hwcap.h | 1 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/aarch64/cpu-features.c | 35 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/aarch64/cpu-features.h | 49 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/aarch64/dl-procinfo.c | 60 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/aarch64/libc-start.c | 41 |
5 files changed, 186 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/aarch64/bits/hwcap.h b/sysdeps/unix/sysv/linux/aarch64/bits/hwcap.h index 5975894521..cef3225af0 100644 --- a/sysdeps/unix/sysv/linux/aarch64/bits/hwcap.h +++ b/sysdeps/unix/sysv/linux/aarch64/bits/hwcap.h @@ -32,3 +32,4 @@ #define HWCAP_ATOMICS (1 << 8) #define HWCAP_FPHP (1 << 9) #define HWCAP_ASIMDHP (1 << 10) +#define HWCAP_CPUID (1 << 11) diff --git a/sysdeps/unix/sysv/linux/aarch64/cpu-features.c b/sysdeps/unix/sysv/linux/aarch64/cpu-features.c new file mode 100644 index 0000000000..702506249d --- /dev/null +++ b/sysdeps/unix/sysv/linux/aarch64/cpu-features.c @@ -0,0 +1,35 @@ +/* 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/>. */ + +#include <cpu-features.h> +#include <sys/auxv.h> + +static inline void +init_cpu_features (struct cpu_features *cpu_features) +{ + if (GLRO(dl_hwcap) & HWCAP_CPUID) + { + register uint64_t id = 0; + asm volatile ("mrs %0, midr_el1" : "=r"(id)); + cpu_features->midr_el1 = id; + } + else + { + cpu_features->midr_el1 = 0; + } +} 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 */ diff --git a/sysdeps/unix/sysv/linux/aarch64/dl-procinfo.c b/sysdeps/unix/sysv/linux/aarch64/dl-procinfo.c new file mode 100644 index 0000000000..438046a562 --- /dev/null +++ b/sysdeps/unix/sysv/linux/aarch64/dl-procinfo.c @@ -0,0 +1,60 @@ +/* Data for AArch64 version of processor capability information. + Linux version. + Copyright (C) 2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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/>. */ + +/* If anything should be added here check whether the size of each string + is still ok with the given array size. + + All the #ifdefs in the definitions are quite irritating but + necessary if we want to avoid duplicating the information. There + are three different modes: + + - PROCINFO_DECL is defined. This means we are only interested in + declarations. + + - PROCINFO_DECL is not defined: + + + if SHARED is defined the file is included in an array + initializer. The .element = { ... } syntax is needed. + + + if SHARED is not defined a normal array initialization is + needed. + */ + +#ifndef PROCINFO_CLASS +# define PROCINFO_CLASS +#endif + +#if !IS_IN (ldconfig) +# if !defined PROCINFO_DECL && defined SHARED + ._dl_aarch64_cpu_features +# else +PROCINFO_CLASS struct cpu_features _dl_aarch64_cpu_features +# endif +# ifndef PROCINFO_DECL += { } +# endif +# if !defined SHARED || defined PROCINFO_DECL +; +# else +, +# endif +#endif + +#undef PROCINFO_DECL +#undef PROCINFO_CLASS diff --git a/sysdeps/unix/sysv/linux/aarch64/libc-start.c b/sysdeps/unix/sysv/linux/aarch64/libc-start.c new file mode 100644 index 0000000000..a5babd49ea --- /dev/null +++ b/sysdeps/unix/sysv/linux/aarch64/libc-start.c @@ -0,0 +1,41 @@ +/* Override csu/libc-start.c on AArch64. + Copyright (C) 2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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/>. */ + +#ifdef SHARED +# include <csu/libc-start.c> +# else +/* The main work is done in the generic function. */ +# define LIBC_START_DISABLE_INLINE +# define LIBC_START_MAIN generic_start_main +# include <csu/libc-start.c> +# include <cpu-features.c> + +extern struct cpu_features _dl_aarch64_cpu_features; + +int +__libc_start_main (int (*main) (int, char **, char ** MAIN_AUXVEC_DECL), + int argc, char **argv, + __typeof (main) init, + void (*fini) (void), + void (*rtld_fini) (void), void *stack_end) +{ + init_cpu_features (&_dl_aarch64_cpu_features); + return generic_start_main (main, argc, argv, init, fini, rtld_fini, + stack_end); +} +#endif |