include/asm-arm/arch-sa1100/memory.h

   1 /*
   2  * linux/include/asm-arm/arch-sa1100/memory.h
   3  *
   4  * Copyright (c) 1999 Nicolas Pitre <nico@visuaide.com>
   5  */
   6
   7 #ifndef __ASM_ARCH_MEMORY_H
   8 #define __ASM_ARCH_MEMORY_H
   9
  10
  11 /*
  12  * Task size: 3GB
  13  */
  14 #define TASK_SIZE       (0xc0000000UL)
  15
  16 /*
  17  * Page offset: 3GB
  18  */
  19 #define PAGE_OFFSET     (0xc0000000UL)
  20 #define PHYS_OFFSET     (0x00000000UL)
  21
  22 #define __virt_to_phys__is_a_macro
  23 #define __phys_to_virt__is_a_macro
  24
  25 /*
  26  * The following gives a maximum memory size of 128MB (32MB in each bank).
  27  *
  28  * Does this still need to be optimised for one bank machines?
  29  */
  30 #define __virt_to_phys(x)       (((x) & 0xe0ffffff) | ((x) & 0x06000000) << 2)
  31 #define __phys_to_virt(x)       (((x) & 0xe7ffffff) | ((x) & 0x30000000) >> 2)
  32
  33 /*
  34  * Virtual view <-> DMA view memory address translations
  35  * virt_to_bus: Used to translate the virtual address to an
  36  *               address suitable to be passed to set_dma_addr
  37  * bus_to_virt: Used to convert an address for DMA operations
  38  *               to an address that the kernel can use.
  39  *
  40  * On the SA1100, bus addresses are equivalent to physical addresses.
  41  */
  42 #define __virt_to_bus__is_a_macro
  43 #define __bus_to_virt__is_a_macro
  44 #define __virt_to_bus(x)         __virt_to_phys(x)
  45 #define __bus_to_virt(x)         __phys_to_virt(x)
  46
  47 #endif