The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/isa/isa_dmareg.h

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    1 /*-
    2  * Copyright (C) 2005 TAKAHASHI Yoshihiro. All rights reserved.
    3  *
    4  * Redistribution and use in source and binary forms, with or without
    5  * modification, are permitted provided that the following conditions
    6  * are met:
    7  * 1. Redistributions of source code must retain the above copyright
    8  *    notice, this list of conditions and the following disclaimer.
    9  * 2. Redistributions in binary form must reproduce the above copyright
   10  *    notice, this list of conditions and the following disclaimer in the
   11  *    documentation and/or other materials provided with the distribution.
   12  *
   13  * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   16  * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
   17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   23  * SUCH DAMAGE.
   24  *
   25  * $FreeBSD$
   26  */
   27 
   28 #ifndef _ISA_ISA_DMAREG_H_
   29 #define _ISA_ISA_DMAREG_H_
   30 
   31 #include <dev/ic/i8237.h>
   32 
   33 #define IO_DMA1         0x00                    /* 8237A DMA Controller #1 */
   34 #define IO_DMA2         0xC0                    /* 8237A DMA Controller #2 */
   35 
   36 /*
   37  * Register definitions for DMA controller 1 (channels 0..3):
   38  */
   39 #define DMA1_CHN(c)     (IO_DMA1 + 1*(2*(c)))   /* addr reg for channel c */
   40 #define DMA1_STATUS     (IO_DMA1 + 1*8)         /* status register */
   41 #define DMA1_SMSK       (IO_DMA1 + 1*10)        /* single mask register */
   42 #define DMA1_MODE       (IO_DMA1 + 1*11)        /* mode register */
   43 #define DMA1_FFC        (IO_DMA1 + 1*12)        /* clear first/last FF */
   44 #define DMA1_RESET      (IO_DMA1 + 1*13)        /* reset */
   45 
   46 /*
   47  * Register definitions for DMA controller 2 (channels 4..7):
   48  */
   49 #define DMA2_CHN(c)     (IO_DMA2 + 2*(2*(c)))   /* addr reg for channel c */
   50 #define DMA2_STATUS     (IO_DMA2 + 2*8)         /* status register */
   51 #define DMA2_SMSK       (IO_DMA2 + 2*10)        /* single mask register */
   52 #define DMA2_MODE       (IO_DMA2 + 2*11)        /* mode register */
   53 #define DMA2_FFC        (IO_DMA2 + 2*12)        /* clear first/last FF */
   54 #define DMA2_RESET      (IO_DMA2 + 2*13)        /* reset */
   55 
   56 #endif /* _ISA_ISA_DMAREG_H_ */

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