Root/include/asm-generic/dma.h

1#ifndef __ASM_GENERIC_DMA_H
2#define __ASM_GENERIC_DMA_H
3/*
4 * This file traditionally describes the i8237 PC style DMA controller.
5 * Most architectures don't have these any more and can get the minimal
6 * implementation from kernel/dma.c by not defining MAX_DMA_CHANNELS.
7 *
8 * Some code relies on seeing MAX_DMA_ADDRESS though.
9 */
10#define MAX_DMA_ADDRESS PAGE_OFFSET
11
12extern int request_dma(unsigned int dmanr, const char *device_id);
13extern void free_dma(unsigned int dmanr);
14
15#endif /* __ASM_GENERIC_DMA_H */
16

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