FreeBSD/Linux Kernel Cross Reference
sys/dev/ic/i8237.h
1 /*
2 * Intel 8237 DMA Controller
3 *
4 * $FreeBSD: releng/10.3/sys/dev/ic/i8237.h 146214 2005-05-14 10:14:56Z nyan $
5 */
6
7 #define DMA37MD_SINGLE 0x40 /* single pass mode */
8 #define DMA37MD_CASCADE 0xc0 /* cascade mode */
9 #define DMA37MD_AUTO 0x50 /* autoinitialise single pass mode */
10 #define DMA37MD_WRITE 0x04 /* read the device, write memory operation */
11 #define DMA37MD_READ 0x08 /* write the device, read memory operation */
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