From 849369d6c66d3054688672f97d31fceb8e8230fb Mon Sep 17 00:00:00 2001
From: root <root@artemis.panaceas.org>
Date: Fri, 25 Dec 2015 04:40:36 +0000
Subject: initial_commit

---
 arch/arm/mach-iop13xx/include/mach/memory.h | 72 +++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 arch/arm/mach-iop13xx/include/mach/memory.h

(limited to 'arch/arm/mach-iop13xx/include/mach/memory.h')

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 00000000..1afa99ef
--- /dev/null
+++ b/arch/arm/mach-iop13xx/include/mach/memory.h
@@ -0,0 +1,72 @@
+#ifndef __ASM_ARCH_MEMORY_H
+#define __ASM_ARCH_MEMORY_H
+
+#include <mach/hardware.h>
+
+/*
+ * Physical DRAM offset.
+ */
+#define PLAT_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)
+
+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 = __phys_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_phys(__virt);			\
+		__dma;							\
+	})
+
+#define __arch_pfn_to_dma(dev, pfn)					\
+	({								\
+		/* __is_lbus_virt() can never be true for RAM pages */	\
+		(dma_addr_t)__pfn_to_phys(pfn);				\
+	})
+
+#define __arch_dma_to_pfn(dev, addr)	__phys_to_pfn(addr)
+
+#endif /* CONFIG_ARCH_IOP13XX */
+#endif /* !ASSEMBLY */
+
+#endif
-- 
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