memory.h

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/*
 * arch/arm/mach-omap1/include/mach/memory.h
 */

#ifndef __ASM_ARCH_MEMORY_H
#define __ASM_ARCH_MEMORY_H

/*
 * Physical DRAM offset.
 */
#define PLAT_PHYS_OFFSET        UL(0x10000000)

/*
 * Bus address is physical address, except for OMAP-1510 Local Bus.
 * OMAP-1510 bus address is translated into a Local Bus address if the
 * OMAP bus type is lbus. We do the address translation based on the
 * device overriding the defaults used in the dma-mapping API.
 * Note that the is_lbus_device() test is not very efficient on 1510
 * because of the strncmp().
 */
#if defined(CONFIG_ARCH_OMAP15XX) && !defined(__ASSEMBLER__)
#include <plat/cpu.h>

/*
 * OMAP-1510 Local Bus address offset
 */
#define OMAP1510_LB_OFFSET  UL(0x30000000)

#define virt_to_lbus(x)     ((x) - PAGE_OFFSET + OMAP1510_LB_OFFSET)
#define lbus_to_virt(x)     ((x) - OMAP1510_LB_OFFSET + PAGE_OFFSET)
#define is_lbus_device(dev) (cpu_is_omap15xx() && dev && (strncmp(dev_name(dev), "ohci", 4) == 0))

#define __arch_pfn_to_dma(dev, pfn) \
    ({ dma_addr_t __dma = __pfn_to_phys(pfn); \
       if (is_lbus_device(dev)) \
        __dma = __dma - PHYS_OFFSET + OMAP1510_LB_OFFSET; \
       __dma; })

#define __arch_dma_to_pfn(dev, addr)    \
    ({ dma_addr_t __dma = addr;             \
       if (is_lbus_device(dev))             \
        __dma += PHYS_OFFSET - OMAP1510_LB_OFFSET;  \
       __phys_to_pfn(__dma);                \
    })

#define __arch_dma_to_virt(dev, addr)   ({ (void *) (is_lbus_device(dev) ? \
                        lbus_to_virt(addr) : \
                        __phys_to_virt(addr)); })

#define __arch_virt_to_dma(dev, addr)   ({ unsigned long __addr = (unsigned long)(addr); \
                       (dma_addr_t) (is_lbus_device(dev) ? \
                        virt_to_lbus(__addr) : \
                        __virt_to_phys(__addr)); })

#endif  /* CONFIG_ARCH_OMAP15XX */

#endif