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