sys/arch/atari/include/scu.h

   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  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #ifndef _MACHINE_SCU_H
  29 #define _MACHINE_SCU_H
  30 /*
  31  * Atari TT hardware:
  32  * SCU registers
  33  */
  34
  35 #define SCU     ((struct scu *)AD_SCU)
  36
  37
  38 /*
  39  * System control unit
  40  */
  41 struct scu {
  42         volatile u_char fil1;
  43         volatile u_char sys_mask;       /* System interrupt mask        */
  44         volatile u_char fil2;
  45         volatile u_char sys_stat;       /* System interrupt status      */
  46         volatile u_char fil3;
  47         volatile u_char sys_int;        /* System interrupter           */
  48         volatile u_char fil4;
  49         volatile u_char vme_int;        /* VME interrupter              */
  50         volatile u_char fil5;
  51         volatile u_char gen_reg1;       /* General purpose reg. 1       */
  52         volatile u_char fil6;
  53         volatile u_char gen_reg2;       /* General purpose reg. 2       */
  54         volatile u_char fil7;
  55         volatile u_char vme_mask;       /* VME interrupt mask           */
  56         volatile u_char fil8;
  57         volatile u_char vme_stat;       /* VME interrupt status         */
  58 };
  59
  60 /*
  61  * Bits for system mask & stat.
  62  * Read 'sys_stat' first, reading 'sys_mask' clears pending bits in 'sys_stat'.
  63  */
  64 #define SCU_SYSFAIL     0x80    /* _Sysfail in VME bus (Auto vectored)  */
  65 #define SCU_MFP         0x40    /* MFP interrupt (Programmable)         */
  66 #define SCU_SCC         0x20    /* SCC interrupt (Programmable)         */
  67 #define SCU_VSYNC       0x10    /* Vertical Sync (Auto vectored)        */
  68                      /* 0x08 Not Used */
  69 #define SCU_HSYNC       0x04    /* Horizontal Sync (Auto vectored)      */
  70 #define SCU_SYS_SOFT    0x02    /* System Software INT (Auto vectored)  */
  71                      /* 0x00 Not Used */
  72
  73 /*
  74  * Bits for VME mask & stat.
  75  * Read 'vme_stat' first, reading 'vme_mask' clears pending bits in 'vme_stat'.
  76  * Not that MFP/SCC interrupts are hard-wired to the mentioned VME IRQ's.
  77  * (or'ed).
  78  */
  79 #define SCU_IRQ7        0x80
  80 #define SCU_IQ6_MFP     0x40    /* Also MFP interrupt                   */
  81 #define SCU_IRQ5_SCC    0x20    /* Also SCC interrupt                   */
  82 #define SCU_IRQ4        0x10
  83 #define SCU_IRQ3_SOFT   0x08    /* Also VME Software interrupt          */
  84 #define SCU_IRQ2        0x04
  85 #define SCU_IRQ1        0x02
  86                      /* 0x00 Not Used */
  87
  88 /*
  89  * Generate/remove Software system interrupt.
  90  * Note: Will not be cleared automatically!!
  91  */
  92 #define SET_SOFT_INT    (SCU->sys_int = 1)
  93 #define CLR_SOFT_INT    (SCU->sys_int = 0)
  94
  95 /*
  96  * Generate/remove Software VME interrupt.
  97  * Note: Will not be cleared automatically!!
  98  */
  99 #define SET_VME_INT     (SCU->vme_int = 1)
 100 #define CLR_VME_INT     (SCU->vme_int = 0)
 101 #endif /* _MACHINE_SCU_H */