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-dependant 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
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