1 /*
2  * linux/include/asm-arm/arch-shark/dma.h
3  *
4  * by Alexander Schulz
5  */
6 #ifndef __ASM_ARCH_DMA_H
7 #define __ASM_ARCH_DMA_H
8 
9 /* Use only the lowest 4MB, nothing else works.
10  * The rest is not DMAable. See dev /  .properties
11  * in OpenFirmware.
12  */
13 #define MAX_DMA_ADDRESS		0xC0400000
14 #define MAX_DMA_CHANNELS	8
15 #define DMA_ISA_CASCADE         4
16 
__arch_adjust_zones(int node,unsigned long * zone_size,unsigned long * zhole_size)17 static inline void __arch_adjust_zones(int node, unsigned long *zone_size, unsigned long *zhole_size)
18 {
19   if (node != 0) return;
20   /* Only the first 4 MB (=1024 Pages) are usable for DMA */
21   zone_size[1] = zone_size[0] - 1024;
22   zone_size[0] = 1024;
23   zhole_size[1] = zhole_size[0];
24   zhole_size[0] = 0;
25 }
26 
27 #define arch_adjust_zones(node,size,holes) __arch_adjust_zones(node,size,holes)
28 
29 #endif /* _ASM_ARCH_DMA_H */
30 
31