arch/arm/mach-iop13xx/include/mach/memory.h

   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