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};
39
40union vfp_state {
41	struct vfp_hard_struct	hard;
42};
43
44extern void vfp_flush_thread(union vfp_state *);
45extern void vfp_release_thread(union vfp_state *);
46
47#define FP_HARD_SIZE 35
48
49struct fp_hard_struct {
50	unsigned int save[FP_HARD_SIZE];		/* as yet undefined */
51};
52
53#define FP_SOFT_SIZE 35
54
55struct fp_soft_struct {
56	unsigned int save[FP_SOFT_SIZE];		/* undefined information */
57};
58
59#define IWMMXT_SIZE	0x98
60
61struct iwmmxt_struct {
62	unsigned int save[IWMMXT_SIZE / sizeof(unsigned int)];
63};
64
65union fp_state {
66	struct fp_hard_struct	hard;
67	struct fp_soft_struct	soft;
68#ifdef CONFIG_IWMMXT
69	struct iwmmxt_struct	iwmmxt;
70#endif
71};
72
73#define FP_SIZE (sizeof(union fp_state) / sizeof(int))
74
75struct crunch_state {
76	unsigned int	mvdx[16][2];
77	unsigned int	mvax[4][3];
78	unsigned int	dspsc[2];
79};
80
81#define CRUNCH_SIZE	sizeof(struct crunch_state)
82
83#endif
84
85#endif
86