41 lines
1.5 KiB
C
41 lines
1.5 KiB
C
/*
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* (C) Copyright 2004, Psyent Corporation <www.psyent.com>
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* Scott McNutt <smcnutt@psyent.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef __NIOS2_H__
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#define __NIOS2_H__
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/*------------------------------------------------------------------------
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* Control registers -- use with wrctl() & rdctl()
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*----------------------------------------------------------------------*/
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#define CTL_STATUS 0 /* Processor status reg */
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#define CTL_ESTATUS 1 /* Exception status reg */
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#define CTL_BSTATUS 2 /* Break status reg */
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#define CTL_IENABLE 3 /* Interrut enable reg */
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#define CTL_IPENDING 4 /* Interrut pending reg */
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/*------------------------------------------------------------------------
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* Access to control regs
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*----------------------------------------------------------------------*/
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#define rdctl(reg) __builtin_rdctl(reg)
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#define wrctl(reg, val) __builtin_wrctl(reg, val)
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/*------------------------------------------------------------------------
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* Control reg bit masks
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*----------------------------------------------------------------------*/
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#define STATUS_IE (1<<0) /* Interrupt enable */
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#define STATUS_U (1<<1) /* User-mode */
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/*------------------------------------------------------------------------
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* Bit-31 Cache bypass -- only valid for data access. When data cache
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* is not implemented, bit 31 is ignored for compatibility.
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*----------------------------------------------------------------------*/
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#define CACHE_BYPASS(a) ((a) | 0x80000000)
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#define CACHE_NO_BYPASS(a) ((a) & ~0x80000000)
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#endif /* __NIOS2_H__ */
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