arch/arm/mach-omap1/include/mach/memory.h

   1 /*
   2  * arch/arm/mach-omap1/include/mach/memory.h
   3  */
   4
   5 #ifndef __ASM_ARCH_MEMORY_H
   6 #define __ASM_ARCH_MEMORY_H
   7
   8 /*
   9  * Physical DRAM offset.
  10  */
  11 #define PLAT_PHYS_OFFSET                UL(0x10000000)
  12
  13 /*
  14  * Bus address is physical address, except for OMAP-1510 Local Bus.
  15  * OMAP-1510 bus address is translated into a Local Bus address if the
  16  * OMAP bus type is lbus. We do the address translation based on the
  17  * device overriding the defaults used in the dma-mapping API.
  18  * Note that the is_lbus_device() test is not very efficient on 1510
  19  * because of the strncmp().
  20  */
  21 #if defined(CONFIG_ARCH_OMAP15XX) && !defined(__ASSEMBLER__)
  22 #include "../../mach-omap1/soc.h"
  23
  24 /*
  25  * OMAP-1510 Local Bus address offset
  26  */
  27 #define OMAP1510_LB_OFFSET      UL(0x30000000)
  28
  29 #define virt_to_lbus(x)         ((x) - PAGE_OFFSET + OMAP1510_LB_OFFSET)
  30 #define lbus_to_virt(x)         ((x) - OMAP1510_LB_OFFSET + PAGE_OFFSET)
  31 #define is_lbus_device(dev)     (cpu_is_omap15xx() && dev && (strncmp(dev_name(dev), "ohci", 4) == 0))
  32
  33 #define __arch_pfn_to_dma(dev, pfn)     \
  34         ({ dma_addr_t __dma = __pfn_to_phys(pfn); \
  35            if (is_lbus_device(dev)) \
  36                 __dma = __dma - PHYS_OFFSET + OMAP1510_LB_OFFSET; \
  37            __dma; })
  38
  39 #define __arch_dma_to_pfn(dev, addr)    \
  40         ({ dma_addr_t __dma = addr;                             \
  41            if (is_lbus_device(dev))                             \
  42                 __dma += PHYS_OFFSET - OMAP1510_LB_OFFSET;      \
  43            __phys_to_pfn(__dma);                                \
  44         })
  45
  46 #define __arch_dma_to_virt(dev, addr)   ({ (void *) (is_lbus_device(dev) ? \
  47                                                 lbus_to_virt(addr) : \
  48                                                 __phys_to_virt(addr)); })
  49
  50 #define __arch_virt_to_dma(dev, addr)   ({ unsigned long __addr = (unsigned long)(addr); \
  51                                            (dma_addr_t) (is_lbus_device(dev) ? \
  52                                                 virt_to_lbus(__addr) : \
  53                                                 __virt_to_phys(__addr)); })
  54
  55 #endif  /* CONFIG_ARCH_OMAP15XX */
  56
  57 #endif