1 files changed, 81 insertions, 0 deletions
diff --git a/arch/arm/mach-iop13xx/include/mach/memory.h b/arch/arm/mach-iop13xx/include/mach/memory.h
new file mode 100644
index 00000000000..b82602d529b
--- /dev/null
+++ b/arch/arm/mach-iop13xx/include/mach/memory.h
@@ -0,0 +1,81 @@
+#ifndef __ASM_ARCH_MEMORY_H
+#define __ASM_ARCH_MEMORY_H
+
+#include <mach/hardware.h>
+
+/*
+ * Physical DRAM offset.
+ */
+#define PHYS_OFFSET	UL(0x00000000)
+
+#ifndef __ASSEMBLY__
+
+#if defined(CONFIG_ARCH_IOP13XX)
+#define IOP13XX_PMMR_V_START (IOP13XX_PMMR_VIRT_MEM_BASE)
+#define IOP13XX_PMMR_V_END   (IOP13XX_PMMR_VIRT_MEM_BASE + IOP13XX_PMMR_SIZE)
+#define IOP13XX_PMMR_P_START (IOP13XX_PMMR_PHYS_MEM_BASE)
+#define IOP13XX_PMMR_P_END   (IOP13XX_PMMR_PHYS_MEM_BASE + IOP13XX_PMMR_SIZE)
+
+/*
+ * Virtual view <-> PCI DMA view memory address translations
+ * virt_to_bus: Used to translate the virtual address to an
+ *		address suitable to be passed to set_dma_addr
+ * bus_to_virt: Used to convert an address for DMA operations
+ *		to an address that the kernel can use.
+ */
+
+/* RAM has 1:1 mapping on the PCIe/x Busses */
+#define __virt_to_bus(x)	(__virt_to_phys(x))
+#define __bus_to_virt(x)	(__phys_to_virt(x))
+
+static inline dma_addr_t __virt_to_lbus(unsigned long x)
+{
+	return x + IOP13XX_PMMR_PHYS_MEM_BASE - IOP13XX_PMMR_VIRT_MEM_BASE;
+}
+
+static inline unsigned long __lbus_to_virt(dma_addr_t x)
+{
+	return x + IOP13XX_PMMR_VIRT_MEM_BASE - IOP13XX_PMMR_PHYS_MEM_BASE;
+}
+
+#define __is_lbus_dma(a)				\
+	((a) >= IOP13XX_PMMR_P_START && (a) < IOP13XX_PMMR_P_END)
+
+#define __is_lbus_virt(a)				\
+	((a) >= IOP13XX_PMMR_V_START && (a) < IOP13XX_PMMR_V_END)
+
+/* Device is an lbus device if it is on the platform bus of the IOP13XX */
+#define is_lbus_device(dev) 				\
+	(dev && strncmp(dev->bus->name, "platform", 8) == 0)
+
+#define __arch_dma_to_virt(dev, addr)					\
+	({								\
+		unsigned long __virt;					\
+		dma_addr_t __dma = addr;				\
+		if (is_lbus_device(dev) && __is_lbus_dma(__dma))	\
+			__virt = __lbus_to_virt(__dma);			\
+		else							\
+			__virt = __bus_to_virt(__dma);			\
+		(void *)__virt;						\
+	})
+
+#define __arch_virt_to_dma(dev, addr)					\
+	({								\
+		unsigned long __virt = (unsigned long)addr;		\
+		dma_addr_t __dma;					\
+		if (is_lbus_device(dev) && __is_lbus_virt(__virt))	\
+			__dma = __virt_to_lbus(__virt);			\
+		else							\
+			__dma = __virt_to_bus(__virt);			\
+		__dma;							\
+	})
+
+#define __arch_page_to_dma(dev, page)					\
+	__arch_virt_to_dma(dev, page_address(page))
+
+#endif /* CONFIG_ARCH_IOP13XX */
+#endif /* !ASSEMBLY */
+
+#define PFN_TO_NID(addr)	(0)
+
+#endif