1 files changed, 94 insertions, 0 deletions

diff --git a/include/asm-arm/arch-lh7a40x/memory.h b/include/asm-arm/arch-lh7a40x/memory.h
new file mode 100644
index 000000000000..7e2fea372663
--- /dev/null
+++ b/include/asm-arm/arch-lh7a40x/memory.h
@@ -0,0 +1,94 @@
+/* include/asm-arm/arch-lh7a40x/memory.h
+ *
+ *  Copyright (C) 2004 Coastal Environmental Systems
+ *
+ *  This program is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License
+ *  version 2 as published by the Free Software Foundation.
+ *
+ *
+ *  Refer to <file:Documentation/arm/Sharp-LH/SDRAM> for more information.
+ *
+ */
+
+#ifndef __ASM_ARCH_MEMORY_H
+#define __ASM_ARCH_MEMORY_H
+
+/*
+ * Physical DRAM offset.
+ */
+#define PHYS_OFFSET     (0xc0000000UL)
+
+/*
+ * Virtual view <-> 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.
+ */
+#define __virt_to_bus(x)         __virt_to_phys(x)
+#define __bus_to_virt(x)         __phys_to_virt(x)
+
+#ifdef CONFIG_DISCONTIGMEM
+
+#define NODES_SHIFT     4       /* Up to 16 nodes */
+
+/*
+ * Given a kernel address, find the home node of the underlying memory.
+ */
+
+# ifdef CONFIG_LH7A40X_ONE_BANK_PER_NODE
+#  define KVADDR_TO_NID(addr) \
+  (  ((((unsigned long) (addr) - PAGE_OFFSET) >> 24) &  1)\
+   | ((((unsigned long) (addr) - PAGE_OFFSET) >> 25) & ~1))
+# else  /* 2 banks per node */
+#  define KVADDR_TO_NID(addr) \
+      (((unsigned long) (addr) - PAGE_OFFSET) >> 26)
+# endif
+
+/*
+ * Given a page frame number, convert it to a node id.
+ */
+
+# ifdef CONFIG_LH7A40X_ONE_BANK_PER_NODE
+#  define PFN_TO_NID(pfn) \
+  (((((pfn) - PHYS_PFN_OFFSET) >> (24 - PAGE_SHIFT)) &  1)\
+ | ((((pfn) - PHYS_PFN_OFFSET) >> (25 - PAGE_SHIFT)) & ~1))
+# else  /* 2 banks per node */
+#  define PFN_TO_NID(pfn) \
+    (((pfn) - PHYS_PFN_OFFSET) >> (26 - PAGE_SHIFT))
+#endif
+
+/*
+ * Given a kaddr, ADDR_TO_MAPBASE finds the owning node of the memory
+ * and return the mem_map of that node.
+ */
+# define ADDR_TO_MAPBASE(kaddr) NODE_MEM_MAP(KVADDR_TO_NID(kaddr))
+
+/*
+ * Given a page frame number, find the owning node of the memory
+ * and return the mem_map of that node.
+ */
+# define PFN_TO_MAPBASE(pfn)    NODE_MEM_MAP(PFN_TO_NID(pfn))
+
+/*
+ * Given a kaddr, LOCAL_MEM_MAP finds the owning node of the memory
+ * and returns the index corresponding to the appropriate page in the
+ * node's mem_map.
+ */
+
+# ifdef CONFIG_LH7A40X_ONE_BANK_PER_NODE
+#  define LOCAL_MAP_NR(addr) \
+       (((unsigned long)(addr) & 0x003fffff) >> PAGE_SHIFT)
+# else  /* 2 banks per node */
+#  define LOCAL_MAP_NR(addr) \
+       (((unsigned long)(addr) & 0x01ffffff) >> PAGE_SHIFT)
+# endif
+
+#else
+
+# define PFN_TO_NID(addr)       (0)
+
+#endif
+
+#endif