1/* 2 * Intel 8237 DMA Controller 3 */ 4 5#define DMA37MD_SINGLE 0x40 /* single pass mode */ 6#define DMA37MD_CASCADE 0xc0 /* cascade mode */ 7#define DMA37MD_AUTO 0x50 /* autoinitialise single pass mode */ 8#define DMA37MD_WRITE 0x04 /* read the device, write memory operation */ 9#define DMA37MD_READ 0x08 /* write the device, read memory operation */ 10