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>
62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
/*
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* linux/include/asm-arm/arch-ixp4xx/memory.h
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*
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* Copyright (c) 2001-2004 MontaVista Software, Inc.
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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 <asm/sizes.h>
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/*
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* Physical DRAM offset.
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*/
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#define PHYS_OFFSET UL(0x00000000)
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#ifndef __ASSEMBLY__
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/*
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* Only first 64MB of memory can be accessed via PCI.
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* We use GFP_DMA to allocate safe buffers to do map/unmap.
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* This is really ugly and we need a better way of specifying
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* DMA-capable regions of memory.
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*/
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static inline void __arch_adjust_zones(int node, unsigned long *zone_size,
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unsigned long *zhole_size)
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{
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unsigned int sz = SZ_64M >> PAGE_SHIFT;
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/*
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* Only adjust if > 64M on current system
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*/
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if (node || (zone_size[0] <= sz))
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return;
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zone_size[1] = zone_size[0] - sz;
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zone_size[0] = sz;
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zhole_size[1] = zhole_size[0];
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zhole_size[0] = 0;
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}
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#define arch_adjust_zones(node, size, holes) \
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__arch_adjust_zones(node, size, holes)
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#define ISA_DMA_THRESHOLD (SZ_64M - 1)
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#endif
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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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* These are dummies for now.
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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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#endif
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