release/src-rt-6.x/linux/linux-2.6/arch/arm/mach-omap2/io.c

   1 /*
   2  * linux/arch/arm/mach-omap2/io.c
   3  *
   4  * OMAP2 I/O mapping code
   5  *
   6  * Copyright (C) 2005 Nokia Corporation
   7  * Author: Juha Yrjölä <juha.yrjola@nokia.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/kernel.h>
  16 #include <linux/init.h>
  17
  18 #include <asm/tlb.h>
  19 #include <asm/io.h>
  20
  21 #include <asm/mach/map.h>
  22
  23 #include <asm/arch/mux.h>
  24 #include <asm/arch/omapfb.h>
  25
  26 extern void omap_sram_init(void);
  27 extern int omap2_clk_init(void);
  28 extern void omap2_check_revision(void);
  29 extern void gpmc_init(void);
  30 extern void omapfb_reserve_sdram(void);
  31
  32 /*
  33  * The machine specific code may provide the extra mapping besides the
  34  * default mapping provided here.
  35  */
  36 static struct map_desc omap2_io_desc[] __initdata = {
  37         {
  38                 .virtual        = L3_24XX_VIRT,
  39                 .pfn            = __phys_to_pfn(L3_24XX_PHYS),
  40                 .length         = L3_24XX_SIZE,
  41                 .type           = MT_DEVICE
  42         },
  43         {
  44                 .virtual        = DSP_MEM_24XX_VIRT,
  45                 .pfn            = __phys_to_pfn(DSP_MEM_24XX_PHYS),
  46                 .length         = DSP_MEM_24XX_SIZE,
  47                 .type           = MT_DEVICE
  48         },
  49         {
  50                 .virtual        = DSP_IPI_24XX_VIRT,
  51                 .pfn            = __phys_to_pfn(DSP_IPI_24XX_PHYS),
  52                 .length         = DSP_IPI_24XX_SIZE,
  53                 .type           = MT_DEVICE
  54         },
  55         {
  56                 .virtual        = DSP_MMU_24XX_VIRT,
  57                 .pfn            = __phys_to_pfn(DSP_MMU_24XX_PHYS),
  58                 .length         = DSP_MMU_24XX_SIZE,
  59                 .type           = MT_DEVICE
  60         }
  61 };
  62
  63 void __init omap2_map_common_io(void)
  64 {
  65         iotable_init(omap2_io_desc, ARRAY_SIZE(omap2_io_desc));
  66
  67         /* Normally devicemaps_init() would flush caches and tlb after
  68          * mdesc->map_io(), but we must also do it here because of the CPU
  69          * revision check below.
  70          */
  71         local_flush_tlb_all();
  72         flush_cache_all();
  73
  74         omap2_check_revision();
  75         omap_sram_init();
  76         omapfb_reserve_sdram();
  77 }
  78
  79 void __init omap2_init_common_hw(void)
  80 {
  81         omap2_mux_init();
  82         omap2_clk_init();
  83         gpmc_init();
  84 }