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