mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 12:43:55 +08:00
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
|
|
#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 */
|