include/nios2.h

   1 /*
   2  * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
   3  * Scott McNutt <smcnutt@psyent.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #ifndef __NIOS2_H__
   9 #define __NIOS2_H__
  10
  11 /*------------------------------------------------------------------------
  12  * Control registers -- use with wrctl() & rdctl()
  13  *----------------------------------------------------------------------*/
  14 #define CTL_STATUS      0               /* Processor status reg         */
  15 #define CTL_ESTATUS     1               /* Exception status reg         */
  16 #define CTL_BSTATUS     2               /* Break status reg             */
  17 #define CTL_IENABLE     3               /* Interrut enable reg          */
  18 #define CTL_IPENDING    4               /* Interrut pending reg         */
  19
  20 /*------------------------------------------------------------------------
  21  * Access to control regs
  22  *----------------------------------------------------------------------*/
  23
  24 #define rdctl(reg) __builtin_rdctl(reg)
  25 #define wrctl(reg, val) __builtin_wrctl(reg, val)
  26
  27 /*------------------------------------------------------------------------
  28  * Control reg bit masks
  29  *----------------------------------------------------------------------*/
  30 #define STATUS_IE       (1<<0)          /* Interrupt enable             */
  31 #define STATUS_U        (1<<1)          /* User-mode                    */
  32
  33 /*------------------------------------------------------------------------
  34  * Bit-31 Cache bypass -- only valid for data access. When data cache
  35  * is not implemented, bit 31 is ignored for compatibility.
  36  *----------------------------------------------------------------------*/
  37 #define CACHE_BYPASS(a) ((a) | 0x80000000)
  38 #define CACHE_NO_BYPASS(a) ((a) & ~0x80000000)
  39
  40 #endif /* __NIOS2_H__ */