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72 lines
1.8 KiB
72 lines
1.8 KiB
/* arch/arm/mach-lh7a40x/include/mach/memory.h
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*
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* Copyright (C) 2004 Coastal Environmental Systems
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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*
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* Refer to <file:Documentation/arm/Sharp-LH/SDRAM> for more information.
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*
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*/
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#ifndef __ASM_ARCH_MEMORY_H
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#define __ASM_ARCH_MEMORY_H
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/*
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* Physical DRAM offset.
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*/
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#define PHYS_OFFSET UL(0xc0000000)
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#ifdef CONFIG_DISCONTIGMEM
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/*
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* Given a kernel address, find the home node of the underlying memory.
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*/
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# ifdef CONFIG_LH7A40X_ONE_BANK_PER_NODE
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# define KVADDR_TO_NID(addr) \
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( ((((unsigned long) (addr) - PAGE_OFFSET) >> 24) & 1)\
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| ((((unsigned long) (addr) - PAGE_OFFSET) >> 25) & ~1))
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# else /* 2 banks per node */
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# define KVADDR_TO_NID(addr) \
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(((unsigned long) (addr) - PAGE_OFFSET) >> 26)
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# endif
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/*
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* Given a page frame number, convert it to a node id.
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*/
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# ifdef CONFIG_LH7A40X_ONE_BANK_PER_NODE
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# define PFN_TO_NID(pfn) \
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(((((pfn) - PHYS_PFN_OFFSET) >> (24 - PAGE_SHIFT)) & 1)\
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| ((((pfn) - PHYS_PFN_OFFSET) >> (25 - PAGE_SHIFT)) & ~1))
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# else /* 2 banks per node */
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# define PFN_TO_NID(pfn) \
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(((pfn) - PHYS_PFN_OFFSET) >> (26 - PAGE_SHIFT))
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#endif
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/*
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* Given a kaddr, LOCAL_MEM_MAP finds the owning node of the memory
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* and returns the index corresponding to the appropriate page in the
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* node's mem_map.
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*/
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# ifdef CONFIG_LH7A40X_ONE_BANK_PER_NODE
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# define LOCAL_MAP_NR(addr) \
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(((unsigned long)(addr) & 0x003fffff) >> PAGE_SHIFT)
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# else /* 2 banks per node */
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# define LOCAL_MAP_NR(addr) \
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(((unsigned long)(addr) & 0x01ffffff) >> PAGE_SHIFT)
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# endif
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#endif
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/*
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* Sparsemem version of the above
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*/
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#define MAX_PHYSMEM_BITS 32
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#define SECTION_SIZE_BITS 24
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#endif
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