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TOMOYO Linux Cross Reference
Linux/arch/arm/mach-iop13xx/include/mach/memory.h

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  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 static inline dma_addr_t __virt_to_lbus(unsigned long x)
 20 {
 21         return x + IOP13XX_PMMR_PHYS_MEM_BASE - IOP13XX_PMMR_VIRT_MEM_BASE;
 22 }
 23 
 24 static inline unsigned long __lbus_to_virt(dma_addr_t x)
 25 {
 26         return x + IOP13XX_PMMR_VIRT_MEM_BASE - IOP13XX_PMMR_PHYS_MEM_BASE;
 27 }
 28 
 29 #define __is_lbus_dma(a)                                \
 30         ((a) >= IOP13XX_PMMR_P_START && (a) < IOP13XX_PMMR_P_END)
 31 
 32 #define __is_lbus_virt(a)                               \
 33         ((a) >= IOP13XX_PMMR_V_START && (a) < IOP13XX_PMMR_V_END)
 34 
 35 /* Device is an lbus device if it is on the platform bus of the IOP13XX */
 36 #define is_lbus_device(dev)                             \
 37         (dev && strncmp(dev->bus->name, "platform", 8) == 0)
 38 
 39 #define __arch_dma_to_virt(dev, addr)                                   \
 40         ({                                                              \
 41                 unsigned long __virt;                                   \
 42                 dma_addr_t __dma = addr;                                \
 43                 if (is_lbus_device(dev) && __is_lbus_dma(__dma))        \
 44                         __virt = __lbus_to_virt(__dma);                 \
 45                 else                                                    \
 46                         __virt = __phys_to_virt(__dma);                 \
 47                 (void *)__virt;                                         \
 48         })
 49 
 50 #define __arch_virt_to_dma(dev, addr)                                   \
 51         ({                                                              \
 52                 unsigned long __virt = (unsigned long)addr;             \
 53                 dma_addr_t __dma;                                       \
 54                 if (is_lbus_device(dev) && __is_lbus_virt(__virt))      \
 55                         __dma = __virt_to_lbus(__virt);                 \
 56                 else                                                    \
 57                         __dma = __virt_to_phys(__virt);                 \
 58                 __dma;                                                  \
 59         })
 60 
 61 #define __arch_page_to_dma(dev, page)                                   \
 62         ({                                                              \
 63                 /* __is_lbus_virt() can never be true for RAM pages */  \
 64                 (dma_addr_t)page_to_phys(page);                         \
 65         })
 66 
 67 #endif /* CONFIG_ARCH_IOP13XX */
 68 #endif /* !ASSEMBLY */
 69 
 70 #define PFN_TO_NID(addr)        (0)
 71 
 72 #endif
 73 

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