55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
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/*
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* arch/arm/mach-omap1/include/mach/memory.h
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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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/* REVISIT: omap1 legacy drivers still rely on this */
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#include <mach/soc.h>
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/*
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* Bus address is physical address, except for OMAP-1510 Local Bus.
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* OMAP-1510 bus address is translated into a Local Bus address if the
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* OMAP bus type is lbus. We do the address translation based on the
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* device overriding the defaults used in the dma-mapping API.
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* Note that the is_lbus_device() test is not very efficient on 1510
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* because of the strncmp().
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*/
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#if defined(CONFIG_ARCH_OMAP15XX) && !defined(__ASSEMBLER__)
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/*
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* OMAP-1510 Local Bus address offset
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*/
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#define OMAP1510_LB_OFFSET UL(0x30000000)
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#define virt_to_lbus(x) ((x) - PAGE_OFFSET + OMAP1510_LB_OFFSET)
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#define lbus_to_virt(x) ((x) - OMAP1510_LB_OFFSET + PAGE_OFFSET)
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#define is_lbus_device(dev) (cpu_is_omap15xx() && dev && (strncmp(dev_name(dev), "ohci", 4) == 0))
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#define __arch_pfn_to_dma(dev, pfn) \
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({ dma_addr_t __dma = __pfn_to_phys(pfn); \
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if (is_lbus_device(dev)) \
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__dma = __dma - PHYS_OFFSET + OMAP1510_LB_OFFSET; \
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__dma; })
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#define __arch_dma_to_pfn(dev, addr) \
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({ dma_addr_t __dma = addr; \
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if (is_lbus_device(dev)) \
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__dma += PHYS_OFFSET - OMAP1510_LB_OFFSET; \
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__phys_to_pfn(__dma); \
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})
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#define __arch_dma_to_virt(dev, addr) ({ (void *) (is_lbus_device(dev) ? \
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lbus_to_virt(addr) : \
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__phys_to_virt(addr)); })
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#define __arch_virt_to_dma(dev, addr) ({ unsigned long __addr = (unsigned long)(addr); \
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(dma_addr_t) (is_lbus_device(dev) ? \
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virt_to_lbus(__addr) : \
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__virt_to_phys(__addr)); })
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#endif /* CONFIG_ARCH_OMAP15XX */
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#endif
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