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 26struct 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 48union vfp_state { 49 struct vfp_hard_struct hard; 50}; 51 52extern void vfp_flush_thread(union vfp_state *); 53extern void vfp_release_thread(union vfp_state *); 54 55#define FP_HARD_SIZE 35 56 57struct fp_hard_struct { 58 unsigned int save[FP_HARD_SIZE]; /* as yet undefined */ 59}; 60 61#define FP_SOFT_SIZE 35 62 63struct fp_soft_struct { 64 unsigned int save[FP_SOFT_SIZE]; /* undefined information */ 65}; 66 67#define IWMMXT_SIZE 0x98 68 69struct iwmmxt_struct { 70 unsigned int save[IWMMXT_SIZE / sizeof(unsigned int)]; 71}; 72 73union 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 83struct 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