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/* $NetBSD: icu.h,v 1.5 1995/08/25 07:52:18 phil Exp $ */
/*
* Copyright (c) 1993 Philip A. Nelson.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Philip A. Nelson.
* 4. The name of Philip A. Nelson may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY PHILIP NELSON ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL PHILIP NELSON BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* icu.h
*/
/* icu.h: defines for use with the ns32532 icu. */
#ifndef _MACHINE_ICU_H_
#define _MACHINE_ICU_H_
/* We don't use vector interrupts, but make it right anyway */
#define VEC_ICU 0x10
/* The address of the ICU! */
#define ICU_ADR 0xfffffe00
/* ICU clock speed. */
#define ICU_CLK_HZ 3686400/4 /* raw ICU clock speed */
/* ICU registers
*/
#define HVCT 0
#define SVCT 1
#define ELTG 2
#define TPL 4
#define IPND 6
#define ISRV 8
#define IMSK 10
#define CSRC 12
#define FPRT 14
#define MCTL 16
#define OCASN 17
#define CIPTR 18
#define PDAT 19
#define IPS 20
#define PDIR 21
#define CCTL 22
#define CICTL 23
#define LCSV 24
#define HCSV 26
#define LCCV 28
#define HCCV 30
/* Byte and Word access to ICU registers
*/
#define ICUB(n) *((unsigned char *)(ICU_ADR + n))
#define ICUW(n) *((unsigned short *)(ICU_ADR + n))
#ifndef LOCORE
/* Interrupt trigger modes
*/
enum {HIGH_LEVEL, LOW_LEVEL, RISING_EDGE, FALLING_EDGE} int_modes;
#endif /* !LOCORE */
/* Hardware interrupt request lines.
*/
#define IR_CLK 2 /* highest priority */
#define IR_SCSI0 5 /* Adaptec 6250 */
#define IR_SCSI1 4 /* NCR DP8490 */
#define IR_TTY0 13
#define IR_TTY0RDY 12
#define IR_TTY1 11
#define IR_TTY1RDY 10
#define IR_TTY2 9
#define IR_TTY2RDY 8
#define IR_TTY3 7
#define IR_TTY3RDY 6
/* edge polarity
* 0 0 falling edge
* 0 1 rising edge
* 1 0 low level
* 1 1 high level
*
*/
#define IEDGE 0
#define IPOLARITY 0
#define ints_off bicpsrw PSR_I
#define ints_on bispsrw PSR_I
/* SCSI controllers */
#define AIC6250 0
#define DP8490 1
#define ICU_SCSI_BIT 0x80
#ifndef LOCORE
/*
* Select a SCSI controller.
*/
static __inline int
scsi_select_ctlr(int ctlr)
{
int old;
old = (ICUB(PDAT) & ICU_SCSI_BIT) == 0;
if (ctlr == DP8490)
ICUB(PDAT) &= ~ICU_SCSI_BIT; /* select = 0 for 8490 */
else
ICUB(PDAT) |= ICU_SCSI_BIT; /* select = 1 for AIC6250 */
return(old);
}
#endif /* !LOCORE */
#endif /* _MACHINE_ICU_H_ */
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