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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef __ASM_GENERIC_DMA_H3#define __ASM_GENERIC_DMA_H4/*5 * This file traditionally describes the i8237 PC style DMA controller.6 * Most architectures don't have these any more and can get the minimal7 * implementation from kernel/dma.c by not defining MAX_DMA_CHANNELS.8 *9 * Some code relies on seeing MAX_DMA_ADDRESS though.10 */11#define MAX_DMA_ADDRESS PAGE_OFFSET12 13extern int request_dma(unsigned int dmanr, const char *device_id);14extern void free_dma(unsigned int dmanr);15 16#endif /* __ASM_GENERIC_DMA_H */17