include/asm-arm/arch-shark/memory.h

   1 /*
   2  * linux/include/asm-arm/arch-shark/memory.h
   3  *
   4  * by Alexander Schulz
   5  *
   6  * derived from:
   7  * linux/include/asm-arm/arch-ebsa110/memory.h
   8  * Copyright (c) 1996-1999 Russell King.
   9  */
  10 #ifndef __ASM_ARCH_MEMORY_H
  11 #define __ASM_ARCH_MEMORY_H
  12
  13 #include <asm/sizes.h>
  14
  15 /*
  16  * Physical DRAM offset.
  17  */
  18 #define PHYS_OFFSET     UL(0x08000000)
  19
  20 #ifndef __ASSEMBLY__
  21
  22 static inline void __arch_adjust_zones(int node, unsigned long *zone_size, unsigned long *zhole_size)
  23 {
  24   if (node != 0) return;
  25   /* Only the first 4 MB (=1024 Pages) are usable for DMA */
  26   zone_size[1] = zone_size[0] - 1024;
  27   zone_size[0] = 1024;
  28   zhole_size[1] = zhole_size[0];
  29   zhole_size[0] = 0;
  30 }
  31
  32 #define arch_adjust_zones(node, size, holes) \
  33         __arch_adjust_zones(node, size, holes)
  34
  35 #define ISA_DMA_THRESHOLD       (PHYS_OFFSET + SZ_4M - 1)
  36
  37 #endif
  38
  39 #define __virt_to_bus(x)        __virt_to_phys(x)
  40 #define __bus_to_virt(x)        __phys_to_virt(x)
  41
  42 #endif