kernel/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 #ifndef __ASSEMBLY__
   7
   8 #if defined(CONFIG_ARCH_IOP13XX)
   9 #define IOP13XX_PMMR_V_START (IOP13XX_PMMR_VIRT_MEM_BASE)
  10 #define IOP13XX_PMMR_V_END   (IOP13XX_PMMR_VIRT_MEM_BASE + IOP13XX_PMMR_SIZE)
  11 #define IOP13XX_PMMR_P_START (IOP13XX_PMMR_PHYS_MEM_BASE)
  12 #define IOP13XX_PMMR_P_END   (IOP13XX_PMMR_PHYS_MEM_BASE + IOP13XX_PMMR_SIZE)
  13
  14 static inline dma_addr_t __virt_to_lbus(void __iomem *x)
  15 {
  16         return x + IOP13XX_PMMR_PHYS_MEM_BASE - IOP13XX_PMMR_VIRT_MEM_BASE;
  17 }
  18
  19 static inline void __iomem *__lbus_to_virt(dma_addr_t x)
  20 {
  21         return x + IOP13XX_PMMR_VIRT_MEM_BASE - IOP13XX_PMMR_PHYS_MEM_BASE;
  22 }
  23
  24 #define __is_lbus_dma(a)                                \
  25         ((a) >= IOP13XX_PMMR_P_START && (a) < IOP13XX_PMMR_P_END)
  26
  27 #define __is_lbus_virt(a)                               \
  28         ((a) >= IOP13XX_PMMR_V_START && (a) < IOP13XX_PMMR_V_END)
  29
  30 /* Device is an lbus device if it is on the platform bus of the IOP13XX */
  31 #define is_lbus_device(dev)                             \
  32         (dev && strncmp(dev->bus->name, "platform", 8) == 0)
  33
  34 #define __arch_dma_to_virt(dev, addr)                                   \
  35         ({                                                              \
  36                 void * __virt;                                          \
  37                 dma_addr_t __dma = addr;                                \
  38                 if (is_lbus_device(dev) && __is_lbus_dma(__dma))        \
  39                         __virt = __lbus_to_virt(__dma);                 \
  40                 else                                                    \
  41                         __virt = (void *)__phys_to_virt(__dma);         \
  42                 __virt;                                                 \
  43         })
  44
  45 #define __arch_virt_to_dma(dev, addr)                                   \
  46         ({                                                              \
  47                 void * __virt = addr;                                   \
  48                 dma_addr_t __dma;                                       \
  49                 if (is_lbus_device(dev) && __is_lbus_virt(__virt))      \
  50                         __dma = __virt_to_lbus(__virt);                 \
  51                 else                                                    \
  52                         __dma = __virt_to_phys((unsigned long)__virt);  \
  53                 __dma;                                                  \
  54         })
  55
  56 #define __arch_pfn_to_dma(dev, pfn)                                     \
  57         ({                                                              \
  58                 /* __is_lbus_virt() can never be true for RAM pages */  \
  59                 (dma_addr_t)__pfn_to_phys(pfn);                         \
  60         })
  61
  62 #define __arch_dma_to_pfn(dev, addr)    __phys_to_pfn(addr)
  63
  64 #endif /* CONFIG_ARCH_IOP13XX */
  65 #endif /* !ASSEMBLY */
  66
  67 #endif