74 lines
1.8 KiB
C
74 lines
1.8 KiB
C
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/*
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* linux/include/asm-arm/arch-aaec2000/memory.h
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*
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* Copyright (c) 2005 Nicolas Bellido Y Ortega
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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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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#include <linux/config.h>
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#define PHYS_OFFSET (0xf0000000UL)
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#define __virt_to_bus(x) __virt_to_phys(x)
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#define __bus_to_virt(x) __phys_to_virt(x)
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#ifdef CONFIG_DISCONTIGMEM
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/*
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* The nodes are the followings:
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*
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* node 0: 0xf000.0000 - 0xf3ff.ffff
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* node 1: 0xf400.0000 - 0xf7ff.ffff
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* node 2: 0xf800.0000 - 0xfbff.ffff
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* node 3: 0xfc00.0000 - 0xffff.ffff
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*/
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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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#define KVADDR_TO_NID(addr) \
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(((unsigned long)(addr) - PAGE_OFFSET) >> NODE_MAX_MEM_SHIFT)
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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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#define PFN_TO_NID(pfn) \
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(((pfn) - PHYS_PFN_OFFSET) >> (NODE_MAX_MEM_SHIFT - PAGE_SHIFT))
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/*
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* Given a kaddr, ADDR_TO_MAPBASE finds the owning node of the memory
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* and return the mem_map of that node.
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*/
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#define ADDR_TO_MAPBASE(kaddr) NODE_MEM_MAP(KVADDR_TO_NID(kaddr))
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/*
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* Given a page frame number, find the owning node of the memory
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* and return the mem_map of that node.
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*/
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#define PFN_TO_MAPBASE(pfn) NODE_MEM_MAP(PFN_TO_NID(pfn))
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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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#define LOCAL_MAP_NR(addr) \
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(((unsigned long)(addr) & (NODE_MAX_MEM_SIZE - 1)) >> PAGE_SHIFT)
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#define NODE_MAX_MEM_SHIFT 26
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#define NODE_MAX_MEM_SIZE (1 << NODE_MAX_MEM_SHIFT)
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#else
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#define PFN_TO_NID(addr) (0)
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#endif /* CONFIG_DISCONTIGMEM */
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#endif /* __ASM_ARCH_MEMORY_H */
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