1 files changed, 76 insertions, 0 deletions

diff --git a/include/asm-arm/arch-pxa/memory.h b/include/asm-arm/arch-pxa/memory.h
new file mode 100644
index 000000000000..217a80b820ff
--- /dev/null
+++ b/include/asm-arm/arch-pxa/memory.h
@@ -0,0 +1,76 @@
+/*
+ *  linux/include/asm-arm/arch-pxa/memory.h
+ *
+ * Author:      Nicolas Pitre
+ * Copyright:   (C) 2001 MontaVista Software Inc.
+ *
+ * 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.
+ */
+
+#ifndef __ASM_ARCH_MEMORY_H
+#define __ASM_ARCH_MEMORY_H
+
+/*
+ * Physical DRAM offset.
+ */
+#define PHYS_OFFSET     (0xa0000000UL)
+
+/*
+ * 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
+/*
+ * The nodes are matched with the physical SDRAM banks as follows:
+ *
+ *      node 0:  0xa0000000-0xa3ffffff  -->  0xc0000000-0xc3ffffff
+ *      node 1:  0xa4000000-0xa7ffffff  -->  0xc4000000-0xc7ffffff
+ *      node 2:  0xa8000000-0xabffffff  -->  0xc8000000-0xcbffffff
+ *      node 3:  0xac000000-0xafffffff  -->  0xcc000000-0xcfffffff
+ */
+
+/*
+ * Given a kernel address, find the home node of the underlying memory.
+ */
+#define KVADDR_TO_NID(addr) (((unsigned long)(addr) - PAGE_OFFSET) >> 26)
+
+/*
+ * Given a page frame number, convert it to a node id.
+ */
+#define PFN_TO_NID(pfn)         (((pfn) - PHYS_PFN_OFFSET) >> (26 - PAGE_SHIFT))
+
+/*
+ * Given a kaddr, ADDR_TO_MAPBASE finds the owning node of the memory
+ * and returns 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 returns 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.
+ */
+#define LOCAL_MAP_NR(addr) \
+        (((unsigned long)(addr) & 0x03ffffff) >> PAGE_SHIFT)
+
+#else
+
+#define PFN_TO_NID(addr)        (0)
+
+#endif
+
+#endif