release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-mx5/mm.c

   1 /*
   2  * Copyright 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
   3  *
   4  * The code contained herein is licensed under the GNU General Public
   5  * License.  You may obtain a copy of the GNU General Public License
   6  * Version 2 or later at the following locations:
   7  *
   8  * http://www.opensource.org/licenses/gpl-license.html
   9  * http://www.gnu.org/copyleft/gpl.html
  10  *
  11  * Create static mapping between physical to virtual memory.
  12  */
  13
  14 #include <linux/mm.h>
  15 #include <linux/init.h>
  16
  17 #include <asm/mach/map.h>
  18
  19 #include <mach/hardware.h>
  20 #include <mach/common.h>
  21 #include <mach/iomux-v3.h>
  22
  23 /*
  24  * Define the MX51 memory map.
  25  */
  26 static struct map_desc mxc_io_desc[] __initdata = {
  27         {
  28                 .virtual = MX51_IRAM_BASE_ADDR_VIRT,
  29                 .pfn = __phys_to_pfn(MX51_IRAM_BASE_ADDR),
  30                 .length = MX51_IRAM_SIZE,
  31                 .type = MT_DEVICE
  32         }, {
  33                 .virtual = MX51_DEBUG_BASE_ADDR_VIRT,
  34                 .pfn = __phys_to_pfn(MX51_DEBUG_BASE_ADDR),
  35                 .length = MX51_DEBUG_SIZE,
  36                 .type = MT_DEVICE
  37         }, {
  38                 .virtual = MX51_AIPS1_BASE_ADDR_VIRT,
  39                 .pfn = __phys_to_pfn(MX51_AIPS1_BASE_ADDR),
  40                 .length = MX51_AIPS1_SIZE,
  41                 .type = MT_DEVICE
  42         }, {
  43                 .virtual = MX51_SPBA0_BASE_ADDR_VIRT,
  44                 .pfn = __phys_to_pfn(MX51_SPBA0_BASE_ADDR),
  45                 .length = MX51_SPBA0_SIZE,
  46                 .type = MT_DEVICE
  47         }, {
  48                 .virtual = MX51_AIPS2_BASE_ADDR_VIRT,
  49                 .pfn = __phys_to_pfn(MX51_AIPS2_BASE_ADDR),
  50                 .length = MX51_AIPS2_SIZE,
  51                 .type = MT_DEVICE
  52         },
  53 };
  54
  55 /*
  56  * This function initializes the memory map. It is called during the
  57  * system startup to create static physical to virtual memory mappings
  58  * for the IO modules.
  59  */
  60 void __init mx51_map_io(void)
  61 {
  62         mxc_set_cpu_type(MXC_CPU_MX51);
  63         mxc_iomux_v3_init(MX51_IO_ADDRESS(MX51_IOMUXC_BASE_ADDR));
  64         mxc_arch_reset_init(MX51_IO_ADDRESS(MX51_WDOG_BASE_ADDR));
  65         iotable_init(mxc_io_desc, ARRAY_SIZE(mxc_io_desc));
  66 }
  67
  68 int imx51_register_gpios(void);
  69
  70 void __init mx51_init_irq(void)
  71 {
  72         unsigned long tzic_addr;
  73         void __iomem *tzic_virt;
  74
  75         if (mx51_revision() < MX51_CHIP_REV_2_0)
  76                 tzic_addr = MX51_TZIC_BASE_ADDR_TO1;
  77         else
  78                 tzic_addr = MX51_TZIC_BASE_ADDR;
  79
  80         tzic_virt = ioremap(tzic_addr, SZ_16K);
  81         if (!tzic_virt)
  82                 panic("unable to map TZIC interrupt controller\n");
  83
  84         tzic_init_irq(tzic_virt);
  85         imx51_register_gpios();
  86 }