arch/arm/mach-iop13xx/include/mach/memory.h

   1 #ifndef __ASM_ARCH_MEMORY_H
   2 #define __ASM_ARCH_MEMORY_H
   3
   4 #include <mach/hardware.h>
   5
   6 /*
   7  * Physical DRAM offset.
   8  */
   9 #define PHYS_OFFSET     UL(0x00000000)
  10 #define TASK_SIZE       UL(0x3f000000)
  11 #define PAGE_OFFSET     UL(0x40000000)
  12 #define TASK_UNMAPPED_BASE ((TASK_SIZE + 0x01000000) / 3)
  13
  14 #ifndef __ASSEMBLY__
  15
  16 #if defined(CONFIG_ARCH_IOP13XX)
  17 #define IOP13XX_PMMR_V_START (IOP13XX_PMMR_VIRT_MEM_BASE)
  18 #define IOP13XX_PMMR_V_END   (IOP13XX_PMMR_VIRT_MEM_BASE + IOP13XX_PMMR_SIZE)
  19 #define IOP13XX_PMMR_P_START (IOP13XX_PMMR_PHYS_MEM_BASE)
  20 #define IOP13XX_PMMR_P_END   (IOP13XX_PMMR_PHYS_MEM_BASE + IOP13XX_PMMR_SIZE)
  21
  22 /*
  23  * Virtual view <-> PCI DMA view memory address translations
  24  * virt_to_bus: Used to translate the virtual address to an
  25  *              address suitable to be passed to set_dma_addr
  26  * bus_to_virt: Used to convert an address for DMA operations
  27  *              to an address that the kernel can use.
  28  */
  29
  30 /* RAM has 1:1 mapping on the PCIe/x Busses */
  31 #define __virt_to_bus(x)        (__virt_to_phys(x))
  32 #define __bus_to_virt(x)    (__phys_to_virt(x))
  33
  34 #define virt_to_lbus(x)                                            \
  35 (( ((void*)(x) >= (void*)IOP13XX_PMMR_V_START) &&                  \
  36 ((void*)(x) < (void*)IOP13XX_PMMR_V_END) ) ?                       \
  37 ((x) - IOP13XX_PMMR_VIRT_MEM_BASE + IOP13XX_PMMR_PHYS_MEM_BASE) : \
  38 ((x) - PAGE_OFFSET + PHYS_OFFSET))
  39
  40 #define lbus_to_virt(x)                                            \
  41 (( ((x) >= IOP13XX_PMMR_P_START) && ((x) < IOP13XX_PMMR_P_END) ) ? \
  42 ((x) - IOP13XX_PMMR_PHYS_MEM_BASE + IOP13XX_PMMR_VIRT_MEM_BASE ) : \
  43 ((x) - PHYS_OFFSET + PAGE_OFFSET))
  44
  45 /* Device is an lbus device if it is on the platform bus of the IOP13XX */
  46 #define is_lbus_device(dev) (dev &&\
  47                              (strncmp(dev->bus->name, "platform", 8) == 0))
  48
  49 #define __arch_page_to_dma(dev, page)                                   \
  50 ({is_lbus_device(dev) ? (dma_addr_t)virt_to_lbus(page_address(page)) : \
  51 (dma_addr_t)__virt_to_bus(page_address(page));})
  52
  53 #define __arch_dma_to_virt(dev, addr) \
  54 ({is_lbus_device(dev) ? lbus_to_virt(addr) : __bus_to_virt(addr);})
  55
  56 #define __arch_virt_to_dma(dev, addr) \
  57 ({is_lbus_device(dev) ? virt_to_lbus(addr) : __virt_to_bus(addr);})
  58
  59 #endif /* CONFIG_ARCH_IOP13XX */
  60 #endif /* !ASSEMBLY */
  61
  62 #define PFN_TO_NID(addr)        (0)
  63
  64 #endif