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dma.h
Package: linux-2.4.20.tar.gz [view]
Upload User: jlfgdled
Upload Date: 2013-04-10
Package Size: 33168k
Code Size: 1k
Category:
Linux-Unix program
Development Platform:
Unix_Linux
- /*
- * linux/include/asm-arm/arch-shark/dma.h
- *
- * by Alexander Schulz
- */
- #ifndef __ASM_ARCH_DMA_H
- #define __ASM_ARCH_DMA_H
- /* Use only the lowest 4MB, nothing else works.
- * The rest is not DMAable. See dev / .properties
- * in OpenFirmware.
- */
- #define MAX_DMA_ADDRESS 0xC0400000
- #define MAX_DMA_CHANNELS 8
- #define DMA_ISA_CASCADE 4
- static inline void __arch_adjust_zones(int node, unsigned long *zone_size, unsigned long *zhole_size)
- {
- if (node != 0) return;
- /* Only the first 4 MB (=1024 Pages) are usable for DMA */
- zone_size[1] = zone_size[0] - 1024;
- zone_size[0] = 1024;
- zhole_size[1] = zhole_size[0];
- zhole_size[0] = 0;
- }
- #define arch_adjust_zones(node,size,holes) __arch_adjust_zones(node,size,holes)
- #endif /* _ASM_ARCH_DMA_H */