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Annotation of coherent/f/usr/include.78/sys/dmac.h, revision 1.1

1.1     ! root        1: /* (-lgl
        !             2:  *     COHERENT 386 Device Driver Kit release 2.0
        !             3:  *     Copyright (c) 1982, 1992 by Mark Williams Company.
        !             4:  *     All rights reserved. May not be copied without permission.
        !             5:  -lgl) */
        !             6: 
        !             7: /*
        !             8:  * /usr/include/sys/dmac.h
        !             9:  *
        !            10:  * Constants for the 8237 DMA controller.
        !            11:  *
        !            12:  * Revised: Mon May 24 18:10:51 1993 CDT
        !            13:  */
        !            14: #ifndef        __SYS_DMAC_H__
        !            15: #define        __SYS_DMAC_H__
        !            16: 
        !            17: #define        DMA     0x00                    /* Primary 8237 base port */
        !            18: #define        SDMA    0xC0                    /* Secondary 8237 base port */
        !            19: #define        DMAPAGE 0x80                    /* DMA page registers */
        !            20: #define        CLEARFL 0x0C                    /* Clear F/L offset */
        !            21: #define        SETMASK 0x0A                    /* Set DMA mask offset */
        !            22: #define        SETMODE 0x0B                    /* Set DMA mode offset */
        !            23: #define        RDMEM   0x48                    /* Mode, read memory */
        !            24: #define        WRMEM   0x44                    /* Mode, write memory */
        !            25: #define        MASKOFF 0x00                    /* Mask bit off */
        !            26: #define        MASKON  0x04                    /* Mask bit on */
        !            27: 
        !            28: #if 1
        !            29: /* For compatibility with other DDK's. */
        !            30: #define DMA_Wrmode      0x48    /* single, read, increment, no auto-init */
        !            31: #define DMA_Rdmode      0x44    /* single, write, increment, no auto-init */
        !            32: 
        !            33: /* Channels 0-3 are for 8-bit transfers. */
        !            34: #define DMA_CH0                0
        !            35: #define DMA_CH1                1
        !            36: #define DMA_CH2                2
        !            37: #define DMA_CH3                3
        !            38: 
        !            39: /* Channels 4-7 are for 8-bit transfers. */
        !            40: #define DMA_CH4                4
        !            41: #define DMA_CH5                5
        !            42: #define DMA_CH6                6
        !            43: #define DMA_CH7                7
        !            44: #endif
        !            45: 
        !            46: #ifdef _I386
        !            47: #define DMASEG_SIZE    NBPC            /* Size of a DMA segment.  */
        !            48: #include <sys/param.h>
        !            49: /*
        !            50:  * Identify the dma segment of a physical address.
        !            51:  */
        !            52: #define        dmaseg(p)       ((p) & ~(NBPC-1))
        !            53: #else
        !            54: #define dmaseg(p)      ((p)&0xF0000L)
        !            55: #endif
        !            56:                                
        !            57: #endif

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