arch/arm/mach-mx3/mm.c

   1 /*
   2  *  Copyright (C) 1999,2000 Arm Limited
   3  *  Copyright (C) 2000 Deep Blue Solutions Ltd
   4  *  Copyright (C) 2002 Shane Nay (shane@minirl.com)
   5  *  Copyright 2005-2007 Freescale Semiconductor, Inc. All Rights Reserved.
   6  *    - add MX31 specific definitions
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #include <linux/mm.h>
  24 #include <linux/init.h>
  25 #include <linux/err.h>
  26
  27 #include <asm/pgtable.h>
  28 #include <asm/mach/map.h>
  29 #include <asm/hardware/cache-l2x0.h>
  30
  31 #include <mach/common.h>
  32 #include <mach/hardware.h>
  33
  34 /*!
  35  * @file mm.c
  36  *
  37  * @brief This file creates static virtual to physical mappings, common to all MX3 boards.
  38  *
  39  * @ingroup Memory
  40  */
  41
  42 /*!
  43  * This table defines static virtual address mappings for I/O regions.
  44  * These are the mappings common across all MX3 boards.
  45  */
  46 static struct map_desc mxc_io_desc[] __initdata = {
  47         {
  48                 .virtual        = X_MEMC_BASE_ADDR_VIRT,
  49                 .pfn            = __phys_to_pfn(X_MEMC_BASE_ADDR),
  50                 .length         = X_MEMC_SIZE,
  51                 .type           = MT_DEVICE
  52         }, {
  53                 .virtual        = AVIC_BASE_ADDR_VIRT,
  54                 .pfn            = __phys_to_pfn(AVIC_BASE_ADDR),
  55                 .length         = AVIC_SIZE,
  56                 .type           = MT_DEVICE_NONSHARED
  57         }, {
  58                 .virtual        = AIPS1_BASE_ADDR_VIRT,
  59                 .pfn            = __phys_to_pfn(AIPS1_BASE_ADDR),
  60                 .length         = AIPS1_SIZE,
  61                 .type           = MT_DEVICE_NONSHARED
  62         }, {
  63                 .virtual        = AIPS2_BASE_ADDR_VIRT,
  64                 .pfn            = __phys_to_pfn(AIPS2_BASE_ADDR),
  65                 .length         = AIPS2_SIZE,
  66                 .type           = MT_DEVICE_NONSHARED
  67         },
  68 };
  69
  70 /*!
  71  * This function initializes the memory map. It is called during the
  72  * system startup to create static physical to virtual memory mappings
  73  * for the IO modules.
  74  */
  75 void __init mx31_map_io(void)
  76 {
  77         mxc_set_cpu_type(MXC_CPU_MX31);
  78
  79         iotable_init(mxc_io_desc, ARRAY_SIZE(mxc_io_desc));
  80 }
  81
  82 void __init mx35_map_io(void)
  83 {
  84         mxc_set_cpu_type(MXC_CPU_MX35);
  85
  86         iotable_init(mxc_io_desc, ARRAY_SIZE(mxc_io_desc));
  87 }
  88
  89 #ifdef CONFIG_CACHE_L2X0
  90 static int mxc_init_l2x0(void)
  91 {
  92         void __iomem *l2x0_base;
  93
  94         l2x0_base = ioremap(L2CC_BASE_ADDR, 4096);
  95         if (IS_ERR(l2x0_base)) {
  96                 printk(KERN_ERR "remapping L2 cache area failed with %ld\n",
  97                                 PTR_ERR(l2x0_base));
  98                 return 0;
  99         }
 100
 101         l2x0_init(l2x0_base, 0x00030024, 0x00000000);
 102
 103         return 0;
 104 }
 105
 106 arch_initcall(mxc_init_l2x0);
 107 #endif
 108