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1/*
2 * linux/include/asm-arm/fpstate.h
3 *
4 * Copyright (C) 1995 Russell King
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#ifndef __ASM_ARM_FPSTATE_H
12#define __ASM_ARM_FPSTATE_H
13
14
15#ifndef __ASSEMBLY__
16
17/*
18 * VFP storage area has:
19 * - FPEXC, FPSCR, FPINST and FPINST2.
20 * - 16 double precision data registers
21 * - an implementation-dependant word of state for FLDMX/FSTMX
22 *
23 * FPEXC will always be non-zero once the VFP has been used in this process.
24 */
25
26struct vfp_hard_struct {
27 __u64 fpregs[16];
28#if __LINUX_ARM_ARCH__ < 6
29 __u32 fpmx_state;
30#endif
31 __u32 fpexc;
32 __u32 fpscr;
33 /*
34 * VFP implementation specific state
35 */
36 __u32 fpinst;
37 __u32 fpinst2;
38#ifdef CONFIG_SMP
39 __u32 cpu;
40#endif
41};
42
43union vfp_state {
44 struct vfp_hard_struct hard;
45};
46
47extern void vfp_flush_thread(union vfp_state *);
48extern void vfp_release_thread(union vfp_state *);
49
50#define FP_HARD_SIZE 35
51
52struct fp_hard_struct {
53 unsigned int save[FP_HARD_SIZE]; /* as yet undefined */
54};
55
56#define FP_SOFT_SIZE 35
57
58struct fp_soft_struct {
59 unsigned int save[FP_SOFT_SIZE]; /* undefined information */
60};
61
62#define IWMMXT_SIZE 0x98
63
64struct iwmmxt_struct {
65 unsigned int save[IWMMXT_SIZE / sizeof(unsigned int)];
66};
67
68union fp_state {
69 struct fp_hard_struct hard;
70 struct fp_soft_struct soft;
71#ifdef CONFIG_IWMMXT
72 struct iwmmxt_struct iwmmxt;
73#endif
74};
75
76#define FP_SIZE (sizeof(union fp_state) / sizeof(int))
77
78struct crunch_state {
79 unsigned int mvdx[16][2];
80 unsigned int mvax[4][3];
81 unsigned int dspsc[2];
82};
83
84#define CRUNCH_SIZE sizeof(struct crunch_state)
85
86#endif
87
88#endif