tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * arch/arm/include/asm/vfp.h
4 *
5 * VFP register definitions.
6 * First, the standard VFP set.
7 */
8
9#ifndef __ASM_VFP_H
10#define __ASM_VFP_H
11
12#define FPSID cr0
13#define FPSCR cr1
14#define MVFR1 cr6
15#define MVFR0 cr7
16#define FPEXC cr8
17#define FPINST cr9
18#define FPINST2 cr10
19
20/* FPSID bits */
21#define FPSID_IMPLEMENTER_BIT (24)
22#define FPSID_IMPLEMENTER_MASK (0xff << FPSID_IMPLEMENTER_BIT)
23#define FPSID_SOFTWARE (1<<23)
24#define FPSID_FORMAT_BIT (21)
25#define FPSID_FORMAT_MASK (0x3 << FPSID_FORMAT_BIT)
26#define FPSID_NODOUBLE (1<<20)
27#define FPSID_ARCH_BIT (16)
28#define FPSID_ARCH_MASK (0xF << FPSID_ARCH_BIT)
29#define FPSID_CPUID_ARCH_MASK (0x7F << FPSID_ARCH_BIT)
30#define FPSID_PART_BIT (8)
31#define FPSID_PART_MASK (0xFF << FPSID_PART_BIT)
32#define FPSID_VARIANT_BIT (4)
33#define FPSID_VARIANT_MASK (0xF << FPSID_VARIANT_BIT)
34#define FPSID_REV_BIT (0)
35#define FPSID_REV_MASK (0xF << FPSID_REV_BIT)
36
37/* FPEXC bits */
38#define FPEXC_EX (1 << 31)
39#define FPEXC_EN (1 << 30)
40#define FPEXC_DEX (1 << 29)
41#define FPEXC_FP2V (1 << 28)
42#define FPEXC_VV (1 << 27)
43#define FPEXC_TFV (1 << 26)
44#define FPEXC_LENGTH_BIT (8)
45#define FPEXC_LENGTH_MASK (7 << FPEXC_LENGTH_BIT)
46#define FPEXC_IDF (1 << 7)
47#define FPEXC_IXF (1 << 4)
48#define FPEXC_UFF (1 << 3)
49#define FPEXC_OFF (1 << 2)
50#define FPEXC_DZF (1 << 1)
51#define FPEXC_IOF (1 << 0)
52#define FPEXC_TRAP_MASK (FPEXC_IDF|FPEXC_IXF|FPEXC_UFF|FPEXC_OFF|FPEXC_DZF|FPEXC_IOF)
53
54/* FPSCR bits */
55#define FPSCR_DEFAULT_NAN (1<<25)
56#define FPSCR_FLUSHTOZERO (1<<24)
57#define FPSCR_ROUND_NEAREST (0<<22)
58#define FPSCR_ROUND_PLUSINF (1<<22)
59#define FPSCR_ROUND_MINUSINF (2<<22)
60#define FPSCR_ROUND_TOZERO (3<<22)
61#define FPSCR_RMODE_BIT (22)
62#define FPSCR_RMODE_MASK (3 << FPSCR_RMODE_BIT)
63#define FPSCR_STRIDE_BIT (20)
64#define FPSCR_STRIDE_MASK (3 << FPSCR_STRIDE_BIT)
65#define FPSCR_LENGTH_BIT (16)
66#define FPSCR_LENGTH_MASK (7 << FPSCR_LENGTH_BIT)
67#define FPSCR_IOE (1<<8)
68#define FPSCR_DZE (1<<9)
69#define FPSCR_OFE (1<<10)
70#define FPSCR_UFE (1<<11)
71#define FPSCR_IXE (1<<12)
72#define FPSCR_IDE (1<<15)
73#define FPSCR_IOC (1<<0)
74#define FPSCR_DZC (1<<1)
75#define FPSCR_OFC (1<<2)
76#define FPSCR_UFC (1<<3)
77#define FPSCR_IXC (1<<4)
78#define FPSCR_IDC (1<<7)
79
80/* MVFR0 bits */
81#define MVFR0_A_SIMD_BIT (0)
82#define MVFR0_A_SIMD_MASK (0xf << MVFR0_A_SIMD_BIT)
83#define MVFR0_SP_BIT (4)
84#define MVFR0_SP_MASK (0xf << MVFR0_SP_BIT)
85#define MVFR0_DP_BIT (8)
86#define MVFR0_DP_MASK (0xf << MVFR0_DP_BIT)
87
88/* Bit patterns for decoding the packaged operation descriptors */
89#define VFPOPDESC_LENGTH_BIT (9)
90#define VFPOPDESC_LENGTH_MASK (0x07 << VFPOPDESC_LENGTH_BIT)
91#define VFPOPDESC_UNUSED_BIT (24)
92#define VFPOPDESC_UNUSED_MASK (0xFF << VFPOPDESC_UNUSED_BIT)
93#define VFPOPDESC_OPDESC_MASK (~(VFPOPDESC_LENGTH_MASK | VFPOPDESC_UNUSED_MASK))
94
95#ifndef __ASSEMBLY__
96void vfp_disable(void);
97#endif
98
99#endif /* __ASM_VFP_H */