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io.c

/*
 * DaVinci I/O mapping code
 *
 * Copyright (C) 2005-2006 Texas Instruments
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>

#include <asm/tlb.h>
#include <asm/memory.h>

#include <asm/mach/map.h>
#include <mach/clock.h>

extern void davinci_check_revision(void);

/*
 * The machine specific code may provide the extra mapping besides the
 * default mapping provided here.
 */
static struct map_desc davinci_io_desc[] __initdata = {
      {
            .virtual    = IO_VIRT,
            .pfn        = __phys_to_pfn(IO_PHYS),
            .length           = IO_SIZE,
            .type       = MT_DEVICE
      },
};

void __init davinci_map_common_io(void)
{
      iotable_init(davinci_io_desc, ARRAY_SIZE(davinci_io_desc));

      /* Normally devicemaps_init() would flush caches and tlb after
       * mdesc->map_io(), but we must also do it here because of the CPU
       * revision check below.
       */
      local_flush_tlb_all();
      flush_cache_all();

      /* We want to check CPU revision early for cpu_is_xxxx() macros.
       * IO space mapping must be initialized before we can do that.
       */
      davinci_check_revision();
}

void __init davinci_init_common_hw(void)
{
      davinci_clk_init();
}

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