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

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  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 #ifndef __ASM_ARCH_MEMORY_H
  3 #define __ASM_ARCH_MEMORY_H
  4 
  5 #include <mach/hardware.h>
  6 
  7 #ifndef __ASSEMBLY__
  8 
  9 #if defined(CONFIG_ARCH_IOP13XX)
 10 #define IOP13XX_PMMR_V_START (IOP13XX_PMMR_VIRT_MEM_BASE)
 11 #define IOP13XX_PMMR_V_END   (IOP13XX_PMMR_VIRT_MEM_BASE + IOP13XX_PMMR_SIZE)
 12 #define IOP13XX_PMMR_P_START (IOP13XX_PMMR_PHYS_MEM_BASE)
 13 #define IOP13XX_PMMR_P_END   (IOP13XX_PMMR_PHYS_MEM_BASE + IOP13XX_PMMR_SIZE)
 14 
 15 static inline dma_addr_t __virt_to_lbus(void __iomem *x)
 16 {
 17         return x + IOP13XX_PMMR_PHYS_MEM_BASE - IOP13XX_PMMR_VIRT_MEM_BASE;
 18 }
 19 
 20 static inline void __iomem *__lbus_to_virt(dma_addr_t x)
 21 {
 22         return x + IOP13XX_PMMR_VIRT_MEM_BASE - IOP13XX_PMMR_PHYS_MEM_BASE;
 23 }
 24 
 25 #define __is_lbus_dma(a)                                \
 26         ((a) >= IOP13XX_PMMR_P_START && (a) < IOP13XX_PMMR_P_END)
 27 
 28 #define __is_lbus_virt(a)                               \
 29         ((a) >= IOP13XX_PMMR_V_START && (a) < IOP13XX_PMMR_V_END)
 30 
 31 /* Device is an lbus device if it is on the platform bus of the IOP13XX */
 32 #define is_lbus_device(dev)                             \
 33         (dev && strncmp(dev->bus->name, "platform", 8) == 0)
 34 
 35 #define __arch_dma_to_virt(dev, addr)                                   \
 36         ({                                                              \
 37                 void * __virt;                                          \
 38                 dma_addr_t __dma = addr;                                \
 39                 if (is_lbus_device(dev) && __is_lbus_dma(__dma))        \
 40                         __virt = __lbus_to_virt(__dma);                 \
 41                 else                                                    \
 42                         __virt = (void *)__phys_to_virt(__dma);         \
 43                 __virt;                                                 \
 44         })
 45 
 46 #define __arch_virt_to_dma(dev, addr)                                   \
 47         ({                                                              \
 48                 void * __virt = addr;                                   \
 49                 dma_addr_t __dma;                                       \
 50                 if (is_lbus_device(dev) && __is_lbus_virt(__virt))      \
 51                         __dma = __virt_to_lbus(__virt);                 \
 52                 else                                                    \
 53                         __dma = __virt_to_phys((unsigned long)__virt);  \
 54                 __dma;                                                  \
 55         })
 56 
 57 #define __arch_pfn_to_dma(dev, pfn)                                     \
 58         ({                                                              \
 59                 /* __is_lbus_virt() can never be true for RAM pages */  \
 60                 (dma_addr_t)__pfn_to_phys(pfn);                         \
 61         })
 62 
 63 #define __arch_dma_to_pfn(dev, addr)    __phys_to_pfn(addr)
 64 
 65 #endif /* CONFIG_ARCH_IOP13XX */
 66 #endif /* !ASSEMBLY */
 67 
 68 #endif
 69 

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