home *** CD-ROM | disk | FTP | other *** search
/ PC Welt 2006 November (DVD) / PCWELT_11_2006.ISO / casper / filesystem.squashfs / usr / src / linux-headers-2.6.17-6 / include / asm-mips / dsp.h < prev    next >
Encoding:
C/C++ Source or Header  |  2006-08-11  |  1.9 KB  |  86 lines
  1. /*
  2.  * Copyright (C) 2005 Mips Technologies
  3.  * Author: Chris Dearman, chris@mips.com derived from fpu.h
  4.  *
  5.  * This program is free software; you can redistribute it and/or modify it
  6.  * under the terms of the GNU General Public License as published by the
  7.  * Free Software Foundation;  either version 2 of the  License, or (at your
  8.  * option) any later version.
  9.  */
  10. #ifndef _ASM_DSP_H
  11. #define _ASM_DSP_H
  12.  
  13. #include <asm/cpu.h>
  14. #include <asm/cpu-features.h>
  15. #include <asm/hazards.h>
  16. #include <asm/mipsregs.h>
  17.  
  18. #define DSP_DEFAULT    0x00000000
  19. #define DSP_MASK    0x3ff
  20.  
  21. #define __enable_dsp_hazard()                        \
  22. do {                                    \
  23.     asm("_ehb");                            \
  24. } while (0)
  25.  
  26. static inline void __init_dsp(void)
  27. {
  28.     mthi1(0);
  29.     mtlo1(0);
  30.     mthi2(0);
  31.     mtlo2(0);
  32.     mthi3(0);
  33.     mtlo3(0);
  34.     wrdsp(DSP_DEFAULT, DSP_MASK);
  35. }
  36.  
  37. static inline void init_dsp(void)
  38. {
  39.     if (cpu_has_dsp)
  40.         __init_dsp();
  41. }
  42.  
  43. #define __save_dsp(tsk)                            \
  44. do {                                    \
  45.     tsk->thread.dsp.dspr[0] = mfhi1();                \
  46.     tsk->thread.dsp.dspr[1] = mflo1();                \
  47.     tsk->thread.dsp.dspr[2] = mfhi2();                \
  48.     tsk->thread.dsp.dspr[3] = mflo2();                \
  49.     tsk->thread.dsp.dspr[4] = mfhi3();                \
  50.     tsk->thread.dsp.dspr[5] = mflo3();                \
  51.     tsk->thread.dsp.dspcontrol = rddsp(DSP_MASK);            \
  52. } while (0)
  53.  
  54. #define save_dsp(tsk)                            \
  55. do {                                    \
  56.     if (cpu_has_dsp)                        \
  57.         __save_dsp(tsk);                    \
  58. } while (0)
  59.  
  60. #define __restore_dsp(tsk)                        \
  61. do {                                    \
  62.     mthi1(tsk->thread.dsp.dspr[0]);                    \
  63.     mtlo1(tsk->thread.dsp.dspr[1]);                    \
  64.     mthi2(tsk->thread.dsp.dspr[2]);                    \
  65.     mtlo2(tsk->thread.dsp.dspr[3]);                    \
  66.     mthi3(tsk->thread.dsp.dspr[4]);                    \
  67.     mtlo3(tsk->thread.dsp.dspr[5]);                    \
  68.     wrdsp(tsk->thread.dsp.dspcontrol, DSP_MASK);            \
  69. } while (0)
  70.  
  71. #define restore_dsp(tsk)                        \
  72. do {                                    \
  73.     if (cpu_has_dsp)                        \
  74.         __restore_dsp(tsk);                    \
  75. } while (0)
  76.  
  77. #define __get_dsp_regs(tsk)                        \
  78. ({                                    \
  79.     if (tsk == current)                        \
  80.         __save_dsp(current);                    \
  81.                                     \
  82.     tsk->thread.dsp.dspr;                        \
  83. })
  84.  
  85. #endif /* _ASM_DSP_H */
  86.