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1da177e4 LT |
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 | ||
27 | struct 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 | ||
39 | union vfp_state { | |
40 | struct vfp_hard_struct hard; | |
41 | }; | |
42 | ||
43 | extern void vfp_flush_thread(union vfp_state *); | |
44 | extern void vfp_release_thread(union vfp_state *); | |
45 | ||
46 | #define FP_HARD_SIZE 35 | |
47 | ||
48 | struct fp_hard_struct { | |
49 | unsigned int save[FP_HARD_SIZE]; /* as yet undefined */ | |
50 | }; | |
51 | ||
52 | #define FP_SOFT_SIZE 35 | |
53 | ||
54 | struct fp_soft_struct { | |
55 | unsigned int save[FP_SOFT_SIZE]; /* undefined information */ | |
56 | }; | |
57 | ||
58 | struct iwmmxt_struct { | |
59 | unsigned int save[0x98/sizeof(int) + 1]; | |
60 | }; | |
61 | ||
62 | union 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 |