1 /* $NetBSD: scu.h,v 1.1.1.1 1995/03/26 07:12:08 leo Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Leo Weppelman. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Leo Weppelman. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #ifndef _MACHINE_SCU_H 34 #define _MACHINE_SCU_H 35 /* 36 * Atari TT hardware: 37 * SCU registers 38 */ 39 40 #define SCU ((struct scu *)AD_SCU) 41 42 43 /* 44 * System control unit 45 */ 46 struct scu { 47 volatile u_char fil1; 48 volatile u_char sys_mask; /* System interrupt mask */ 49 volatile u_char fil2; 50 volatile u_char sys_stat; /* System interrupt status */ 51 volatile u_char fil3; 52 volatile u_char sys_int; /* System interrupter */ 53 volatile u_char fil4; 54 volatile u_char vme_int; /* VME interrupter */ 55 volatile u_char fil5; 56 volatile u_char gen_reg1; /* General purpose reg. 1 */ 57 volatile u_char fil6; 58 volatile u_char gen_reg2; /* General purpose reg. 2 */ 59 volatile u_char fil7; 60 volatile u_char vme_mask; /* VME interrupt mask */ 61 volatile u_char fil8; 62 volatile u_char vme_stat; /* VME interrupt status */ 63 }; 64 65 /* 66 * Bits for system mask & stat. 67 * Read 'sys_stat' first, reading 'sys_mask' clears pending bits in 'sys_stat'. 68 */ 69 #define SCU_SYSFAIL 0x80 /* _Sysfail in VME bus (Auto vectored) */ 70 #define SCU_MFP 0x40 /* MFP interrupt (Programmable) */ 71 #define SCU_SCC 0x20 /* SCC interrupt (Programmable) */ 72 #define SCU_VSYNC 0x10 /* Vertical Sync (Auto vectored) */ 73 /* 0x08 Not Used */ 74 #define SCU_HSYNC 0x04 /* Horizontal Sync (Auto vectored) */ 75 #define SCU_SYS_SOFT 0x02 /* System Software INT (Auto vectored) */ 76 /* 0x00 Not Used */ 77 78 /* 79 * Bits for VME mask & stat. 80 * Read 'vme_stat' first, reading 'vme_mask' clears pending bits in 'vme_stat'. 81 * Not that MFP/SCC interrupts are hard-wired to the mentioned VME IRQ's. 82 * (or'ed). 83 */ 84 #define SCU_IRQ7 0x80 85 #define SCU_IQ6_MFP 0x40 /* Also MFP interrupt */ 86 #define SCU_IRQ5_SCC 0x20 /* Also SCC interrupt */ 87 #define SCU_IRQ4 0x10 88 #define SCU_IRQ3_SOFT 0x08 /* Also VME Software interrupt */ 89 #define SCU_IRQ2 0x04 90 #define SCU_IRQ1 0x02 91 /* 0x00 Not Used */ 92 93 /* 94 * Generate/remove Software system interrupt. 95 * Note: Will not be cleared automatically!! 96 */ 97 #define SET_SOFT_INT (SCU->sys_int = 1) 98 #define CLR_SOFT_INT (SCU->sys_int = 0) 99 100 /* 101 * Generate/remove Software VME interrupt. 102 * Note: Will not be cleared automatically!! 103 */ 104 #define SET_VME_INT (SCU->vme_int = 1) 105 #define CLR_VME_INT (SCU->vme_int = 0) 106 #endif /* _MACHINE_SCU_H */ 107