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/*
* linux/include/asm-arm/arch-aaec2000/memory.h
*
* Copyright (c) 2005 Nicolas Bellido Y Ortega
*
* 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
#define PHYS_OFFSET UL(0xf0000000)
#define __virt_to_bus(x) __virt_to_phys(x)
#define __bus_to_virt(x) __phys_to_virt(x)
#ifdef CONFIG_DISCONTIGMEM
/*
* The nodes are the followings:
*
* node 0: 0xf000.0000 - 0xf3ff.ffff
* node 1: 0xf400.0000 - 0xf7ff.ffff
* node 2: 0xf800.0000 - 0xfbff.ffff
* node 3: 0xfc00.0000 - 0xffff.ffff
*/
/*
* Given a kernel address, find the home node of the underlying memory.
*/
#define KVADDR_TO_NID(addr) \
(((unsigned long)(addr) - PAGE_OFFSET) >> NODE_MAX_MEM_SHIFT)
/*
* Given a page frame number, convert it to a node id.
*/
#define PFN_TO_NID(pfn) \
(((pfn) - PHYS_PFN_OFFSET) >> (NODE_MAX_MEM_SHIFT - PAGE_SHIFT))
/*
* 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.
*/
#define LOCAL_MAP_NR(addr) \
(((unsigned long)(addr) & (NODE_MAX_MEM_SIZE - 1)) >> PAGE_SHIFT)
#define NODE_MAX_MEM_SHIFT 26
#define NODE_MAX_MEM_SIZE (1 << NODE_MAX_MEM_SHIFT)
#endif /* CONFIG_DISCONTIGMEM */
#endif /* __ASM_ARCH_MEMORY_H */
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