xref: /linux/arch/arm/include/asm/vfp.h (revision a1c613ae4c322ddd58d5a8539dbfba2a0380a8c0)
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 #ifndef CONFIG_AS_VFP_VMRS_FPINST
13 #define FPSID			cr0
14 #define FPSCR			cr1
15 #define MVFR1			cr6
16 #define MVFR0			cr7
17 #define FPEXC			cr8
18 #define FPINST			cr9
19 #define FPINST2			cr10
20 #endif
21 
22 /* FPSID bits */
23 #define FPSID_IMPLEMENTER_BIT	(24)
24 #define FPSID_IMPLEMENTER_MASK	(0xff << FPSID_IMPLEMENTER_BIT)
25 #define FPSID_SOFTWARE		(1<<23)
26 #define FPSID_FORMAT_BIT	(21)
27 #define FPSID_FORMAT_MASK	(0x3  << FPSID_FORMAT_BIT)
28 #define FPSID_NODOUBLE		(1<<20)
29 #define FPSID_ARCH_BIT		(16)
30 #define FPSID_ARCH_MASK		(0xF  << FPSID_ARCH_BIT)
31 #define FPSID_CPUID_ARCH_MASK	(0x7F  << FPSID_ARCH_BIT)
32 #define FPSID_PART_BIT		(8)
33 #define FPSID_PART_MASK		(0xFF << FPSID_PART_BIT)
34 #define FPSID_VARIANT_BIT	(4)
35 #define FPSID_VARIANT_MASK	(0xF  << FPSID_VARIANT_BIT)
36 #define FPSID_REV_BIT		(0)
37 #define FPSID_REV_MASK		(0xF  << FPSID_REV_BIT)
38 
39 /* FPEXC bits */
40 #define FPEXC_EX		(1 << 31)
41 #define FPEXC_EN		(1 << 30)
42 #define FPEXC_DEX		(1 << 29)
43 #define FPEXC_FP2V		(1 << 28)
44 #define FPEXC_VV		(1 << 27)
45 #define FPEXC_TFV		(1 << 26)
46 #define FPEXC_LENGTH_BIT	(8)
47 #define FPEXC_LENGTH_MASK	(7 << FPEXC_LENGTH_BIT)
48 #define FPEXC_IDF		(1 << 7)
49 #define FPEXC_IXF		(1 << 4)
50 #define FPEXC_UFF		(1 << 3)
51 #define FPEXC_OFF		(1 << 2)
52 #define FPEXC_DZF		(1 << 1)
53 #define FPEXC_IOF		(1 << 0)
54 #define FPEXC_TRAP_MASK		(FPEXC_IDF|FPEXC_IXF|FPEXC_UFF|FPEXC_OFF|FPEXC_DZF|FPEXC_IOF)
55 
56 /* FPSCR bits */
57 #define FPSCR_DEFAULT_NAN	(1<<25)
58 #define FPSCR_FLUSHTOZERO	(1<<24)
59 #define FPSCR_ROUND_NEAREST	(0<<22)
60 #define FPSCR_ROUND_PLUSINF	(1<<22)
61 #define FPSCR_ROUND_MINUSINF	(2<<22)
62 #define FPSCR_ROUND_TOZERO	(3<<22)
63 #define FPSCR_RMODE_BIT		(22)
64 #define FPSCR_RMODE_MASK	(3 << FPSCR_RMODE_BIT)
65 #define FPSCR_STRIDE_BIT	(20)
66 #define FPSCR_STRIDE_MASK	(3 << FPSCR_STRIDE_BIT)
67 #define FPSCR_LENGTH_BIT	(16)
68 #define FPSCR_LENGTH_MASK	(7 << FPSCR_LENGTH_BIT)
69 #define FPSCR_IOE		(1<<8)
70 #define FPSCR_DZE		(1<<9)
71 #define FPSCR_OFE		(1<<10)
72 #define FPSCR_UFE		(1<<11)
73 #define FPSCR_IXE		(1<<12)
74 #define FPSCR_IDE		(1<<15)
75 #define FPSCR_IOC		(1<<0)
76 #define FPSCR_DZC		(1<<1)
77 #define FPSCR_OFC		(1<<2)
78 #define FPSCR_UFC		(1<<3)
79 #define FPSCR_IXC		(1<<4)
80 #define FPSCR_IDC		(1<<7)
81 
82 /* MVFR0 bits */
83 #define MVFR0_A_SIMD_BIT	(0)
84 #define MVFR0_A_SIMD_MASK	(0xf << MVFR0_A_SIMD_BIT)
85 #define MVFR0_SP_BIT		(4)
86 #define MVFR0_SP_MASK		(0xf << MVFR0_SP_BIT)
87 #define MVFR0_DP_BIT		(8)
88 #define MVFR0_DP_MASK		(0xf << MVFR0_DP_BIT)
89 
90 /* MVFR1 bits */
91 #define MVFR1_ASIMDHP_BIT	(20)
92 #define MVFR1_ASIMDHP_MASK	(0xf << MVFR1_ASIMDHP_BIT)
93 #define MVFR1_FPHP_BIT		(24)
94 #define MVFR1_FPHP_MASK		(0xf << MVFR1_FPHP_BIT)
95 
96 /* Bit patterns for decoding the packaged operation descriptors */
97 #define VFPOPDESC_LENGTH_BIT	(9)
98 #define VFPOPDESC_LENGTH_MASK	(0x07 << VFPOPDESC_LENGTH_BIT)
99 #define VFPOPDESC_UNUSED_BIT	(24)
100 #define VFPOPDESC_UNUSED_MASK	(0xFF << VFPOPDESC_UNUSED_BIT)
101 #define VFPOPDESC_OPDESC_MASK	(~(VFPOPDESC_LENGTH_MASK | VFPOPDESC_UNUSED_MASK))
102 
103 #ifndef __ASSEMBLY__
104 void vfp_disable(void);
105 #endif
106 
107 #endif /* __ASM_VFP_H */
108