sysdeps/unix/sysv/linux/aarch64/cpu-features.h

   1 /* Initialize CPU feature data.  AArch64 version.
   2    This file is part of the GNU C Library.
   3    Copyright (C) 2017-2019 Free Software Foundation, Inc.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _CPU_FEATURES_AARCH64_H
  20 #define _CPU_FEATURES_AARCH64_H
  21
  22 #include <stdint.h>
  23
  24 #define MIDR_PARTNUM_SHIFT      4
  25 #define MIDR_PARTNUM_MASK       (0xfff << MIDR_PARTNUM_SHIFT)
  26 #define MIDR_PARTNUM(midr)      \
  27         (((midr) & MIDR_PARTNUM_MASK) >> MIDR_PARTNUM_SHIFT)
  28 #define MIDR_ARCHITECTURE_SHIFT 16
  29 #define MIDR_ARCHITECTURE_MASK  (0xf << MIDR_ARCHITECTURE_SHIFT)
  30 #define MIDR_ARCHITECTURE(midr) \
  31         (((midr) & MIDR_ARCHITECTURE_MASK) >> MIDR_ARCHITECTURE_SHIFT)
  32 #define MIDR_VARIANT_SHIFT      20
  33 #define MIDR_VARIANT_MASK       (0xf << MIDR_VARIANT_SHIFT)
  34 #define MIDR_VARIANT(midr)      \
  35         (((midr) & MIDR_VARIANT_MASK) >> MIDR_VARIANT_SHIFT)
  36 #define MIDR_IMPLEMENTOR_SHIFT  24
  37 #define MIDR_IMPLEMENTOR_MASK   (0xff << MIDR_IMPLEMENTOR_SHIFT)
  38 #define MIDR_IMPLEMENTOR(midr)  \
  39         (((midr) & MIDR_IMPLEMENTOR_MASK) >> MIDR_IMPLEMENTOR_SHIFT)
  40
  41 #define IS_THUNDERX(midr) (MIDR_IMPLEMENTOR(midr) == 'C'        \
  42                            && MIDR_PARTNUM(midr) == 0x0a1)
  43
  44 #define IS_THUNDERX2PA(midr) (MIDR_IMPLEMENTOR(midr) == 'B'     \
  45                            && MIDR_PARTNUM(midr) == 0x516)
  46 #define IS_THUNDERX2(midr) (MIDR_IMPLEMENTOR(midr) == 'C'       \
  47                            && MIDR_PARTNUM(midr) == 0xaf)
  48
  49 #define IS_FALKOR(midr) (MIDR_IMPLEMENTOR(midr) == 'Q'                        \
  50                         && MIDR_PARTNUM(midr) == 0xc00)
  51
  52 #define IS_PHECDA(midr) (MIDR_IMPLEMENTOR(midr) == 'h'                        \
  53                         && MIDR_PARTNUM(midr) == 0x000)
  54 #define IS_ARES(midr) (MIDR_IMPLEMENTOR(midr) == 'A'                          \
  55                         && MIDR_PARTNUM(midr) == 0xd0c)
  56
  57 #define IS_EMAG(midr) (MIDR_IMPLEMENTOR(midr) == 'P'                          \
  58                        && MIDR_PARTNUM(midr) == 0x000)
  59
  60 struct cpu_features
  61 {
  62   uint64_t midr_el1;
  63   unsigned zva_size;
  64 };
  65
  66 #endif /* _CPU_FEATURES_AARCH64_H  */