1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * arch/arm/include/asm/fpstate.h
4 *
5 * Copyright (C) 1995 Russell King
6 */
7
8 #ifndef __ASM_ARM_FPSTATE_H
9 #define __ASM_ARM_FPSTATE_H
10
11
12 #ifndef __ASSEMBLY__
13
14 /*
15 * VFP storage area has:
16 * - FPEXC, FPSCR, FPINST and FPINST2.
17 * - 16 or 32 double precision data registers
18 * - an implementation-dependent word of state for FLDMX/FSTMX (pre-ARMv6)
19 *
20 * FPEXC will always be non-zero once the VFP has been used in this process.
21 */
22
23 struct vfp_hard_struct {
24 #ifdef CONFIG_VFPv3
25 __u64 fpregs[32];
26 #else
27 __u64 fpregs[16];
28 #endif
29 #if __LINUX_ARM_ARCH__ < 6
30 __u32 fpmx_state;
31 #endif
32 __u32 fpexc;
33 __u32 fpscr;
34 /*
35 * VFP implementation specific state
36 */
37 __u32 fpinst;
38 __u32 fpinst2;
39
40 #ifdef CONFIG_SMP
41 __u32 cpu;
42 #endif
43 };
44
45 union vfp_state {
46 struct vfp_hard_struct hard;
47 };
48
49 #define FP_HARD_SIZE 35
50
51 struct fp_hard_struct {
52 unsigned int save[FP_HARD_SIZE]; /* as yet undefined */
53 };
54
55 #define FP_SOFT_SIZE 35
56
57 struct fp_soft_struct {
58 unsigned int save[FP_SOFT_SIZE]; /* undefined information */
59 };
60
61 #define IWMMXT_SIZE 0x98
62
63 struct iwmmxt_struct {
64 unsigned int save[IWMMXT_SIZE / sizeof(unsigned int)];
65 };
66
67 union fp_state {
68 struct fp_hard_struct hard;
69 struct fp_soft_struct soft;
70 #ifdef CONFIG_IWMMXT
71 struct iwmmxt_struct iwmmxt;
72 #endif
73 };
74
75 #define FP_SIZE (sizeof(union fp_state) / sizeof(int))
76
77 #endif
78
79 #endif
80
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