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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#include <linux/config.h>
15
16#ifndef __ASSEMBLY__
17
18/*
19 * VFP storage area has:
20 * - FPEXC, FPSCR, FPINST and FPINST2.
21 * - 16 double precision data registers
22 * - an implementation-dependant word of state for FLDMX/FSTMX
23 *
24 * FPEXC will always be non-zero once the VFP has been used in this process.
25 */
26
27struct vfp_hard_struct {
28 __u64 fpregs[16];
29 __u32 fpmx_state;
30 __u32 fpexc;
31 __u32 fpscr;
32 /*
33 * VFP implementation specific state
34 */
35 __u32 fpinst;
36 __u32 fpinst2;
37};
38
39union vfp_state {
40 struct vfp_hard_struct hard;
41};
42
43extern void vfp_flush_thread(union vfp_state *);
44extern void vfp_release_thread(union vfp_state *);
45
46#define FP_HARD_SIZE 35
47
48struct fp_hard_struct {
49 unsigned int save[FP_HARD_SIZE]; /* as yet undefined */
50};
51
52#define FP_SOFT_SIZE 35
53
54struct fp_soft_struct {
55 unsigned int save[FP_SOFT_SIZE]; /* undefined information */
56};
57
58struct iwmmxt_struct {
59 unsigned int save[0x98/sizeof(int) + 1];
60};
61
62union fp_state {
63 struct fp_hard_struct hard;
64 struct fp_soft_struct soft;
65#ifdef CONFIG_IWMMXT
66 struct iwmmxt_struct iwmmxt;
67#endif
68};
69
70#define FP_SIZE (sizeof(union fp_state) / sizeof(int))
71
72#endif
73
74#endif