53 lines
2.4 KiB
C
53 lines
2.4 KiB
C
/* $NetBSD: serreg.h,v 1.8 1995/04/11 03:00:58 mycroft Exp $ */
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/*
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* Copyright (C) 1993 Allen K. Briggs, Chris P. Caputo,
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* Michael L. Finch, Bradley A. Grantham, and
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* Lawrence A. Kesteloot
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the Alice Group.
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* 4. The names of the Alice Group or any of its members may not be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE ALICE GROUP BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Mac II serial device interface
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*
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* Information used in this source was gleaned from low-memory
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* global variables in MacOS and the Advanced Micro Devices
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* 1992 Data Book/Handbook.
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*/
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/* Gleaned from MacOS */
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extern volatile unsigned char *sccA;
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#define SERBRD(x) (mac68k_machine.sccClkConst / (x) - 2)
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#define SCCCNTL(unit) (sccA[2 - ((unit) << 1)])
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#define SCCRDWR(unit) (sccA[6 - ((unit) << 1)])
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#define SER_DOCNTL(unit, reg, val) \
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{SCCCNTL(unit) = (reg); SCCCNTL(unit) = (val);}
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#define SER_STATUS(unit, reg) \
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(SCCCNTL(unit) = (reg), SCCCNTL(unit))
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