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/*
* (C) Copyright 2004, Psyent Corporation <www.psyent.com>
* Scott McNutt <smcnutt@psyent.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#ifndef __NIOS2_H__
#define __NIOS2_H__
/*------------------------------------------------------------------------
* Control registers -- use with wrctl() & rdctl()
*----------------------------------------------------------------------*/
#define CTL_STATUS 0 /* Processor status reg */
#define CTL_ESTATUS 1 /* Exception status reg */
#define CTL_BSTATUS 2 /* Break status reg */
#define CTL_IENABLE 3 /* Interrut enable reg */
#define CTL_IPENDING 4 /* Interrut pending reg */
/*------------------------------------------------------------------------
* Access to control regs
*----------------------------------------------------------------------*/
#define _str_(x) #x
#define rdctl(reg)\
({unsigned int val;\
asm volatile( "rdctl %0, ctl" _str_(reg)\
: "=r" (val) ); val;})
#define wrctl(reg,val)\
asm volatile( "wrctl ctl" _str_(reg) ",%0"\
: : "r" (val))
/*------------------------------------------------------------------------
* Control reg bit masks
*----------------------------------------------------------------------*/
#define STATUS_IE (1<<0) /* Interrupt enable */
#define STATUS_U (1<<1) /* User-mode */
/*------------------------------------------------------------------------
* Bit-31 Cache bypass -- only valid for data access. When data cache
* is not implemented, bit 31 is ignored for compatibility.
*----------------------------------------------------------------------*/
#define CACHE_BYPASS(a) ((a) | 0x80000000)
#define CACHE_NO_BYPASS(a) ((a) & ~0x80000000)
#endif /* __NIOS2_H__ */
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