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- /* SPDX-License-Identifier: GPL-2.0 */
- #ifndef __ASM_GENERIC_DMA_H
- #define __ASM_GENERIC_DMA_H
- /*
- * This file traditionally describes the i8237 PC style DMA controller.
- * Most architectures don't have these any more and can get the minimal
- * implementation from kernel/dma.c by not defining MAX_DMA_CHANNELS.
- *
- * Some code relies on seeing MAX_DMA_ADDRESS though.
- */
- #define MAX_DMA_ADDRESS PAGE_OFFSET
- extern int request_dma(unsigned int dmanr, const char *device_id);
- extern void free_dma(unsigned int dmanr);
- #endif /* __ASM_GENERIC_DMA_H */
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