memory.h
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上传日期:2009-04-28
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- /* 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
- #endif
- #endif