about summary refs log tree commit diff
path: root/sysdeps/unix/sysv/linux/aarch64/cpu-features.h
blob: c646f9dad132ce94fb4b306f2fdbd7e3728e5098 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
/* Initialize CPU feature data.  AArch64 version.
   This file is part of the GNU C Library.
   Copyright (C) 2017-2018 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)

#define IS_FALKOR(midr) (MIDR_IMPLEMENTOR(midr) == 'Q'			      \
                        && MIDR_PARTNUM(midr) == 0xc00)

struct cpu_features
{
  uint64_t midr_el1;
  unsigned zva_size;
};

#endif /* _CPU_FEATURES_AARCH64_H  */