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Annotation of coherent/f/usr/include/sys/dmac.h, revision 1.1.1.1

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: /* For compatibility with other DDK's. */
                     29: #define DMA_Wrmode      0x48    /* single, read, increment, no auto-init */
                     30: #define DMA_Rdmode      0x44    /* single, write, increment, no auto-init */
                     31: 
                     32: /* Channels 0-3 are for 8-bit transfers. */
                     33: #define DMA_CH0                0
                     34: #define DMA_CH1                1
                     35: #define DMA_CH2                2
                     36: #define DMA_CH3                3
                     37: 
                     38: /* Channels 4-7 are for 8-bit transfers. */
                     39: #define DMA_CH4                4
                     40: #define DMA_CH5                5
                     41: #define DMA_CH6                6
                     42: #define DMA_CH7                7
                     43: 
                     44: #if    _I386
                     45: 
                     46: #define DMASEG_SIZE    NBPC            /* Size of a DMA segment.  */
                     47: #include <kernel/param.h>
                     48: /*
                     49:  * Identify the dma segment of a physical address.
                     50:  */
                     51: #define        dmaseg(p)       ((p) & ~(NBPC-1))
                     52: #else
                     53: #define dmaseg(p)      ((p)&0xF0000L)
                     54: #endif
                     55:                                
                     56: #endif /* ! defined (__SYS_DMAC_H__) */
                     57: 

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