nios2.h 2.4 KB

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  1. /*
  2. * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
  3. * Scott McNutt <smcnutt@psyent.com>
  4. *
  5. * See file CREDITS for list of people who contributed to this
  6. * project.
  7. *
  8. * This program is free software; you can redistribute it and/or
  9. * modify it under the terms of the GNU General Public License as
  10. * published by the Free Software Foundation; either version 2 of
  11. * the License, or (at your option) any later version.
  12. *
  13. * This program is distributed in the hope that it will be useful,
  14. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16. * GNU General Public License for more details.
  17. *
  18. * You should have received a copy of the GNU General Public License
  19. * along with this program; if not, write to the Free Software
  20. * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21. * MA 02111-1307 USA
  22. */
  23. #ifndef __NIOS2_H__
  24. #define __NIOS2_H__
  25. /*------------------------------------------------------------------------
  26. * Control registers -- use with wrctl() & rdctl()
  27. *----------------------------------------------------------------------*/
  28. #define CTL_STATUS 0 /* Processor status reg */
  29. #define CTL_ESTATUS 1 /* Exception status reg */
  30. #define CTL_BSTATUS 2 /* Break status reg */
  31. #define CTL_IENABLE 3 /* Interrut enable reg */
  32. #define CTL_IPENDING 4 /* Interrut pending reg */
  33. /*------------------------------------------------------------------------
  34. * Access to control regs
  35. *----------------------------------------------------------------------*/
  36. #define _str_(x) #x
  37. #define rdctl(reg)\
  38. ({unsigned int val;\
  39. asm volatile( "rdctl %0, ctl" _str_(reg)\
  40. : "=r" (val) ); val;})
  41. #define wrctl(reg,val)\
  42. asm volatile( "wrctl ctl" _str_(reg) ",%0"\
  43. : : "r" (val))
  44. /*------------------------------------------------------------------------
  45. * Control reg bit masks
  46. *----------------------------------------------------------------------*/
  47. #define STATUS_IE (1<<0) /* Interrupt enable */
  48. #define STATUS_U (1<<1) /* User-mode */
  49. /*------------------------------------------------------------------------
  50. * Bit-31 Cache bypass -- only valid for data access. When data cache
  51. * is not implemented, bit 31 is ignored for compatibility.
  52. *----------------------------------------------------------------------*/
  53. #define CACHE_BYPASS(a) ((a) | 0x80000000)
  54. #define CACHE_NO_BYPASS(a) ((a) & ~0x80000000)
  55. #endif /* __NIOS2_H__ */