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1 /*
2  *  arch/arm/include/asm/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 or 32 double precision data registers
21  *  - an implementation-dependent word of state for FLDMX/FSTMX (pre-ARMv6)
22  *
23  *  FPEXC will always be non-zero once the VFP has been used in this process.
24  */
25 
26 struct vfp_hard_struct {
27 #ifdef CONFIG_VFPv3
28 	__u64 fpregs[32];
29 #else
30 	__u64 fpregs[16];
31 #endif
32 #if __LINUX_ARM_ARCH__ < 6
33 	__u32 fpmx_state;
34 #endif
35 	__u32 fpexc;
36 	__u32 fpscr;
37 	/*
38 	 * VFP implementation specific state
39 	 */
40 	__u32 fpinst;
41 	__u32 fpinst2;
42 
43 #ifdef CONFIG_SMP
44 	__u32 cpu;
45 #endif
46 };
47 
48 union vfp_state {
49 	struct vfp_hard_struct	hard;
50 };
51 
52 extern void vfp_flush_thread(union vfp_state *);
53 extern void vfp_release_thread(union vfp_state *);
54 
55 #define FP_HARD_SIZE 35
56 
57 struct fp_hard_struct {
58 	unsigned int save[FP_HARD_SIZE];		/* as yet undefined */
59 };
60 
61 #define FP_SOFT_SIZE 35
62 
63 struct fp_soft_struct {
64 	unsigned int save[FP_SOFT_SIZE];		/* undefined information */
65 };
66 
67 #define IWMMXT_SIZE	0x98
68 
69 struct iwmmxt_struct {
70 	unsigned int save[IWMMXT_SIZE / sizeof(unsigned int)];
71 };
72 
73 union fp_state {
74 	struct fp_hard_struct	hard;
75 	struct fp_soft_struct	soft;
76 #ifdef CONFIG_IWMMXT
77 	struct iwmmxt_struct	iwmmxt;
78 #endif
79 };
80 
81 #define FP_SIZE (sizeof(union fp_state) / sizeof(int))
82 
83 struct crunch_state {
84 	unsigned int	mvdx[16][2];
85 	unsigned int	mvax[4][3];
86 	unsigned int	dspsc[2];
87 };
88 
89 #define CRUNCH_SIZE	sizeof(struct crunch_state)
90 
91 #endif
92 
93 #endif
94