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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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ef1baed887
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-By: Jamie Iles <jamie@jamieiles.com>
56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
/*
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* arch/arm/mach-ks8695/include/mach/memory.h
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*
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* Copyright (C) 2006 Andrew Victor
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*
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* KS8695 Memory definitions
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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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 <mach/hardware.h>
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/*
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* Physical SRAM offset.
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*/
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#define PHYS_OFFSET KS8695_SDRAM_PA
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#ifndef __ASSEMBLY__
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#ifdef CONFIG_PCI
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/* PCI mappings */
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#define __virt_to_bus(x) ((x) - PAGE_OFFSET + KS8695_PCIMEM_PA)
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#define __bus_to_virt(x) ((x) - KS8695_PCIMEM_PA + PAGE_OFFSET)
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/* Platform-bus mapping */
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extern struct bus_type platform_bus_type;
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#define is_lbus_device(dev) (dev && dev->bus == &platform_bus_type)
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#define __arch_dma_to_virt(dev, x) ({ (void *) (is_lbus_device(dev) ? \
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__phys_to_virt(x) : __bus_to_virt(x)); })
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#define __arch_virt_to_dma(dev, x) ({ is_lbus_device(dev) ? \
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(dma_addr_t)__virt_to_phys(x) : (dma_addr_t)__virt_to_bus(x); })
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#define __arch_page_to_dma(dev, x) \
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({ dma_addr_t __dma = page_to_phys(page); \
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if (!is_lbus_device(dev)) \
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__dma = __dma - PHYS_OFFSET + KS8695_PCIMEM_PA; \
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__dma; })
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#define __arch_dma_to_page(dev, x) \
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({ dma_addr_t __dma = x; \
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if (!is_lbus_device(dev)) \
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__dma += PHYS_OFFSET - KS8695_PCIMEM_PA; \
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phys_to_page(__dma); \
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})
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#endif
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#endif
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#endif
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