ae49e80795
The dma.h, hw_irq.h, serial.h and timex.h files originally described PC-style i8237, i8259A, i8250, i8253 and i8255 chips as well as the VGA style text mode graphics. Modern architectures live happily without these specific interfaces, but a few definitions from these headers keep getting used in common code. The new generic headers are what most architectures use anyway nowadays, just implementing the minimal definitions. Signed-off-by: Remis Lima Baima <remis.developer@googlemail.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
16 lines
514 B
C
16 lines
514 B
C
#ifndef __ASM_GENERIC_DMA_H
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#define __ASM_GENERIC_DMA_H
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/*
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* This file traditionally describes the i8237 PC style DMA controller.
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* Most architectures don't have these any more and can get the minimal
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* implementation from kernel/dma.c by not defining MAX_DMA_CHANNELS.
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*
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* Some code relies on seeing MAX_DMA_ADDRESS though.
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*/
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#define MAX_DMA_ADDRESS PAGE_OFFSET
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extern int request_dma(unsigned int dmanr, const char *device_id);
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extern void free_dma(unsigned int dmanr);
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#endif /* __ASM_GENERIC_DMA_H */
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