arch/arm/include/asm/fpstate.h

   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