include/asm-arm/arch-iop3xx/memory.h

   1 /*
   2  * linux/include/asm-arm/arch-iop3xx/memory.h
   3  */
   4
   5 #ifndef __ASM_ARCH_MEMORY_H
   6 #define __ASM_ARCH_MEMORY_H
   7
   8 #include <linux/config.h>
   9 #include <asm/hardware.h>
  10
  11 /*
  12  * Physical DRAM offset.
  13  */
  14 #ifndef CONFIG_ARCH_IOP331
  15 #define PHYS_OFFSET     UL(0xa0000000)
  16 #else
  17 #define PHYS_OFFSET     UL(0x00000000)
  18 #endif
  19
  20 /*
  21  * Virtual view <-> PCI DMA view memory address translations
  22  * virt_to_bus: Used to translate the virtual address to an
  23  *              address suitable to be passed to set_dma_addr
  24  * bus_to_virt: Used to convert an address for DMA operations
  25  *              to an address that the kernel can use.
  26  */
  27 #if defined(CONFIG_ARCH_IOP321)
  28
  29 #define __virt_to_bus(x)        (((__virt_to_phys(x)) & ~(*IOP321_IATVR2)) | ((*IOP321_IABAR2) & 0xfffffff0))
  30 #define __bus_to_virt(x)    (__phys_to_virt(((x) & ~(*IOP321_IALR2)) | ( *IOP321_IATVR2)))
  31
  32 #elif defined(CONFIG_ARCH_IOP331)
  33
  34 #define __virt_to_bus(x)        (((__virt_to_phys(x)) & ~(*IOP331_IATVR2)) | ((*IOP331_IABAR2) & 0xfffffff0))
  35 #define __bus_to_virt(x)    (__phys_to_virt(((x) & ~(*IOP331_IALR2)) | ( *IOP331_IATVR2)))
  36
  37 #endif
  38
  39 #endif