f09b997999
Patch from Nicolas Pitre This patch allows for assorted type of cleanups by letting assembly code use the same set of defines for constant values and avoid duplicated definitions that might not always be in sync, or that might simply be confusing due to the different names for the same thing. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
/* include/asm-arm/arch-lh7a40x/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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/*
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* Virtual view <-> DMA view memory address translations
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* virt_to_bus: Used to translate the virtual address to an
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* address suitable to be passed to set_dma_addr
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* bus_to_virt: Used to convert an address for DMA operations
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* to an address that the kernel can use.
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*/
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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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#define NODES_SHIFT 4 /* Up to 16 nodes */
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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, 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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# 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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#endif
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