nios2.h
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/*
* (C) Copyright 2004, Psyent Corporation <www.psyent.com>
* Scott McNutt <smcnutt@psyent.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#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 rdctl(reg) __builtin_rdctl(reg)
#define wrctl(reg, val) __builtin_wrctl(reg, 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__ */