• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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 
26 struct 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 
40 union vfp_state {
41 	struct vfp_hard_struct	hard;
42 };
43 
44 extern void vfp_flush_thread(union vfp_state *);
45 extern void vfp_release_thread(union vfp_state *);
46 
47 #define FP_HARD_SIZE 35
48 
49 struct fp_hard_struct {
50 	unsigned int save[FP_HARD_SIZE];		/* as yet undefined */
51 };
52 
53 #define FP_SOFT_SIZE 35
54 
55 struct fp_soft_struct {
56 	unsigned int save[FP_SOFT_SIZE];		/* undefined information */
57 };
58 
59 #define IWMMXT_SIZE	0x98
60 
61 struct iwmmxt_struct {
62 	unsigned int save[IWMMXT_SIZE / sizeof(unsigned int)];
63 };
64 
65 union 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 
75 struct 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