135 lines
3.6 KiB
C
135 lines
3.6 KiB
C
/* $NetBSD: icu.h,v 1.8 1996/10/09 07:28:47 matthias Exp $ */
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/*
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* Copyright (c) 1993 Philip A. Nelson.
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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 Philip A. Nelson.
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* 4. The name of Philip A. Nelson may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY PHILIP NELSON ``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 PHILIP NELSON BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* icu.h
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*/
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/* icu.h: defines for use with the ns32532 icu. */
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#ifndef _NS532_ICU_H_
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#define _NS532_ICU_H_
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/* We don't use vector interrupts, but make it right anyway */
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#define VEC_ICU 0x10
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/* The address of the ICU! */
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#define ICU_ADR 0xfffffe00
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/* ICU clock speed. */
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#define ICU_CLK_HZ (3686400/4) /* raw ICU clock speed */
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/* ICU registers
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*/
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#define HVCT 0
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#define SVCT 1
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#define ELTG 2
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#define TPL 4
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#define IPND 6
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#define ISRV 8
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#define IMSK 10
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#define CSRC 12
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#define FPRT 14
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#define MCTL 16
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#define OCASN 17
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#define CIPTR 18
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#define PDAT 19
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#define IPS 20
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#define PDIR 21
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#define CCTL 22
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#define CICTL 23
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#define LCSV 24
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#define HCSV 26
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#define LCCV 28
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#define HCCV 30
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/* Byte and Word access to ICU registers
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*/
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#define ICUB(n) *((unsigned char *)(ICU_ADR + n))
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#define ICUW(n) *((unsigned short *)(ICU_ADR + n))
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#ifndef _LOCORE
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/* Interrupt trigger modes
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*/
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enum {HIGH_LEVEL, LOW_LEVEL, RISING_EDGE, FALLING_EDGE} int_modes;
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#endif /* !_LOCORE */
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/* Hardware interrupt request lines.
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*/
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#define IR_CLK 2 /* highest priority */
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#define IR_SCSI0 5 /* Adaptec 6250 */
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#define IR_SCSI1 4 /* NCR DP8490 */
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#define IR_TTY0 13
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#define IR_TTY0RDY 12
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#define IR_TTY1 11
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#define IR_TTY1RDY 10
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#define IR_TTY2 9
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#define IR_TTY2RDY 8
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#define IR_TTY3 7
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#define IR_TTY3RDY 6
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/* edge polarity
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* 0 0 falling edge
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* 0 1 rising edge
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* 1 0 low level
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* 1 1 high level
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*
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*/
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#define IEDGE 0
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#define IPOLARITY 0
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#define ints_off bicpsrw PSL_I ; nop
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#define ints_on bispsrw PSL_I
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/* SCSI controllers */
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#define AIC6250 0
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#define DP8490 1
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#define ICU_SCSI_BIT 0x80
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#ifndef _LOCORE
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/*
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* Select a SCSI controller.
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*/
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static __inline int
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scsi_select_ctlr(int ctlr)
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{
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int old;
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old = (ICUB(PDAT) & ICU_SCSI_BIT) == 0;
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if (ctlr == DP8490)
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ICUB(PDAT) &= ~ICU_SCSI_BIT; /* select = 0 for 8490 */
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else
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ICUB(PDAT) |= ICU_SCSI_BIT; /* select = 1 for AIC6250 */
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return(old);
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}
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#endif /* !_LOCORE */
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#endif /* _NS532_ICU_H_ */
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