dma.h

来自「geekos 0.3.0简单的操作系统」· C头文件 代码 · 共 29 行

/*
 * 8237A DMA Controller Support
 * Copyright (c) 2003, David H. Hovemeyer <[e-mail]>
 * $Revision: 1.10 $
 * 
 * This is free software.  You are permitted to use,
 * redistribute, and modify it as specified in the file "COPYING".
 */

#ifndef GEEKOS_DMA_H
#define GEEKOS_DMA_H

#include <geekos/ktypes.h>

enum DMA_Direction {
    DMA_READ,
    DMA_WRITE
};

void Init_DMA(void);
bool Reserve_DMA(int chan);
void Setup_DMA(enum DMA_Direction direction, int chan, void *addr, ulong_t size);

void Mask_DMA(int chan);
void Unmask_DMA(int chan);

#endif  /* GEEKOS_DMA_H */