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
  11 #ifndef __ASSEMBLY__
  12
  13 #if defined(CONFIG_ARCH_IOP13XX)
  14 #define IOP13XX_PMMR_V_START (IOP13XX_PMMR_VIRT_MEM_BASE)
  15 #define IOP13XX_PMMR_V_END   (IOP13XX_PMMR_VIRT_MEM_BASE + IOP13XX_PMMR_SIZE)
  16 #define IOP13XX_PMMR_P_START (IOP13XX_PMMR_PHYS_MEM_BASE)
  17 #define IOP13XX_PMMR_P_END   (IOP13XX_PMMR_PHYS_MEM_BASE + IOP13XX_PMMR_SIZE)
  18
  19 /*
  20  * Virtual view <-> PCI DMA view memory address translations
  21  * virt_to_bus: Used to translate the virtual address to an
  22  *              address suitable to be passed to set_dma_addr
  23  * bus_to_virt: Used to convert an address for DMA operations
  24  *              to an address that the kernel can use.
  25  */
  26
  27 /* RAM has 1:1 mapping on the PCIe/x Busses */
  28 #define __virt_to_bus(x)        (__virt_to_phys(x))
  29 #define __bus_to_virt(x)        (__phys_to_virt(x))
  30
  31 static inline dma_addr_t __virt_to_lbus(unsigned long x)
  32 {
  33         return x + IOP13XX_PMMR_PHYS_MEM_BASE - IOP13XX_PMMR_VIRT_MEM_BASE;
  34 }
  35
  36 static inline unsigned long __lbus_to_virt(dma_addr_t x)
  37 {
  38         return x + IOP13XX_PMMR_VIRT_MEM_BASE - IOP13XX_PMMR_PHYS_MEM_BASE;
  39 }
  40
  41 #define __is_lbus_dma(a)                                \
  42         ((a) >= IOP13XX_PMMR_P_START && (a) < IOP13XX_PMMR_P_END)
  43
  44 #define __is_lbus_virt(a)                               \
  45         ((a) >= IOP13XX_PMMR_V_START && (a) < IOP13XX_PMMR_V_END)
  46
  47 /* Device is an lbus device if it is on the platform bus of the IOP13XX */
  48 #define is_lbus_device(dev)                             \
  49         (dev && strncmp(dev->bus->name, "platform", 8) == 0)
  50
  51 #define __arch_dma_to_virt(dev, addr)                                   \
  52         ({                                                              \
  53                 unsigned long __virt;                                   \
  54                 dma_addr_t __dma = addr;                                \
  55                 if (is_lbus_device(dev) && __is_lbus_dma(__dma))        \
  56                         __virt = __lbus_to_virt(__dma);                 \
  57                 else                                                    \
  58                         __virt = __bus_to_virt(__dma);                  \
  59                 (void *)__virt;                                         \
  60         })
  61
  62 #define __arch_virt_to_dma(dev, addr)                                   \
  63         ({                                                              \
  64                 unsigned long __virt = (unsigned long)addr;             \
  65                 dma_addr_t __dma;                                       \
  66                 if (is_lbus_device(dev) && __is_lbus_virt(__virt))      \
  67                         __dma = __virt_to_lbus(__virt);                 \
  68                 else                                                    \
  69                         __dma = __virt_to_bus(__virt);                  \
  70                 __dma;                                                  \
  71         })
  72
  73 #define __arch_page_to_dma(dev, page)                                   \
  74         __arch_virt_to_dma(dev, page_address(page))
  75
  76 #endif /* CONFIG_ARCH_IOP13XX */
  77 #endif /* !ASSEMBLY */
  78
  79 #define PFN_TO_NID(addr)        (0)
  80
  81 #endif