linux-imx

                     arg, func);

}

​

#if !defined(CONFIG_ARCH_HAS_WALK_MEMORY)

​

/*

 * This function calls the @func callback against all memory ranges of type

 * System RAM which are marked as IORESOURCE_SYSTEM_RAM and IORESOUCE_BUSY.

 * It is to be used only for System RAM.

 */

int walk_system_ram_range(unsigned long start_pfn, unsigned long nr_pages,

              void *arg, int (*func)(unsigned long, unsigned long, void *))

{

    resource_size_t start, end;

    unsigned long flags;

    struct resource res;

    unsigned long pfn, end_pfn;

    int ret = -EINVAL;

​

    start = (u64) start_pfn << PAGE_SHIFT;

    end = ((u64)(start_pfn + nr_pages) << PAGE_SHIFT) - 1;

    flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;

    while (start < end &&

           !find_next_iomem_res(start, end, flags, IORES_DESC_NONE,

        pfn = (res.start + PAGE_SIZE - 1) >> PAGE_SHIFT;

        end_pfn = (res.end + 1) >> PAGE_SHIFT;

        if (end_pfn > pfn)

            ret = (*func)(pfn, end_pfn - pfn, arg);

        if (ret)

            break;

        start = res.end + 1;

    }

    return ret;

}