107 lines
3.8 KiB
C
107 lines
3.8 KiB
C
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/* $NetBSD: scu.h,v 1.1.1.1 1995/03/26 07:12:08 leo Exp $ */
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/*
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* Copyright (c) 1995 Leo Weppelman.
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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 Leo Weppelman.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _MACHINE_SCU_H
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#define _MACHINE_SCU_H
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/*
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* Atari TT hardware:
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* SCU registers
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*/
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#define SCU ((struct scu *)AD_SCU)
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/*
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* System control unit
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*/
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struct scu {
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volatile u_char fil1;
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volatile u_char sys_mask; /* System interrupt mask */
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volatile u_char fil2;
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volatile u_char sys_stat; /* System interrupt status */
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volatile u_char fil3;
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volatile u_char sys_int; /* System interrupter */
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volatile u_char fil4;
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volatile u_char vme_int; /* VME interrupter */
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volatile u_char fil5;
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volatile u_char gen_reg1; /* General purpose reg. 1 */
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volatile u_char fil6;
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volatile u_char gen_reg2; /* General purpose reg. 2 */
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volatile u_char fil7;
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volatile u_char vme_mask; /* VME interrupt mask */
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volatile u_char fil8;
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volatile u_char vme_stat; /* VME interrupt status */
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};
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/*
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* Bits for system mask & stat.
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* Read 'sys_stat' first, reading 'sys_mask' clears pending bits in 'sys_stat'.
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*/
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#define SCU_SYSFAIL 0x80 /* _Sysfail in VME bus (Auto vectored) */
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#define SCU_MFP 0x40 /* MFP interrupt (Programmable) */
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#define SCU_SCC 0x20 /* SCC interrupt (Programmable) */
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#define SCU_VSYNC 0x10 /* Vertical Sync (Auto vectored) */
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/* 0x08 Not Used */
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#define SCU_HSYNC 0x04 /* Horizontal Sync (Auto vectored) */
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#define SCU_SYS_SOFT 0x02 /* System Software INT (Auto vectored) */
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/* 0x00 Not Used */
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/*
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* Bits for VME mask & stat.
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* Read 'vme_stat' first, reading 'vme_mask' clears pending bits in 'vme_stat'.
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* Not that MFP/SCC interrupts are hard-wired to the mentioned VME IRQ's.
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* (or'ed).
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*/
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#define SCU_IRQ7 0x80
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#define SCU_IQ6_MFP 0x40 /* Also MFP interrupt */
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#define SCU_IRQ5_SCC 0x20 /* Also SCC interrupt */
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#define SCU_IRQ4 0x10
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#define SCU_IRQ3_SOFT 0x08 /* Also VME Software interrupt */
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#define SCU_IRQ2 0x04
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#define SCU_IRQ1 0x02
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/* 0x00 Not Used */
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/*
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* Generate/remove Software system interrupt.
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* Note: Will not be cleared automatically!!
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*/
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#define SET_SOFT_INT (SCU->sys_int = 1)
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#define CLR_SOFT_INT (SCU->sys_int = 0)
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/*
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* Generate/remove Software VME interrupt.
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* Note: Will not be cleared automatically!!
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*/
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#define SET_VME_INT (SCU->vme_int = 1)
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#define CLR_VME_INT (SCU->vme_int = 0)
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#endif /* _MACHINE_SCU_H */
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