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 #include <mach/iomux-v3.h>
  34
  35 /*!
  36  * @file mm.c
  37  *
  38  * @brief This file creates static virtual to physical mappings, common to all MX3 boards.
  39  *
  40  * @ingroup Memory
  41  */
  42
  43 /*!
  44  * This table defines static virtual address mappings for I/O regions.
  45  * These are the mappings common across all MX3 boards.
  46  */
  47 static struct map_desc mxc_io_desc[] __initdata = {
  48         {
  49                 .virtual        = X_MEMC_BASE_ADDR_VIRT,
  50                 .pfn            = __phys_to_pfn(X_MEMC_BASE_ADDR),
  51                 .length         = X_MEMC_SIZE,
  52                 .type           = MT_DEVICE
  53         }, {
  54                 .virtual        = AVIC_BASE_ADDR_VIRT,
  55                 .pfn            = __phys_to_pfn(AVIC_BASE_ADDR),
  56                 .length         = AVIC_SIZE,
  57                 .type           = MT_DEVICE_NONSHARED
  58         }, {
  59                 .virtual        = AIPS1_BASE_ADDR_VIRT,
  60                 .pfn            = __phys_to_pfn(AIPS1_BASE_ADDR),
  61                 .length         = AIPS1_SIZE,
  62                 .type           = MT_DEVICE_NONSHARED
  63         }, {
  64                 .virtual        = AIPS2_BASE_ADDR_VIRT,
  65                 .pfn            = __phys_to_pfn(AIPS2_BASE_ADDR),
  66                 .length         = AIPS2_SIZE,
  67                 .type           = MT_DEVICE_NONSHARED
  68         },
  69 };
  70
  71 /*!
  72  * This function initializes the memory map. It is called during the
  73  * system startup to create static physical to virtual memory mappings
  74  * for the IO modules.
  75  */
  76 void __init mx31_map_io(void)
  77 {
  78         mxc_set_cpu_type(MXC_CPU_MX31);
  79         mxc_arch_reset_init(IO_ADDRESS(WDOG_BASE_ADDR));
  80
  81         iotable_init(mxc_io_desc, ARRAY_SIZE(mxc_io_desc));
  82 }
  83
  84 #ifdef CONFIG_ARCH_MX35
  85 void __init mx35_map_io(void)
  86 {
  87         mxc_set_cpu_type(MXC_CPU_MX35);
  88         mxc_iomux_v3_init(IO_ADDRESS(IOMUXC_BASE_ADDR));
  89         mxc_arch_reset_init(IO_ADDRESS(WDOG_BASE_ADDR));
  90
  91         iotable_init(mxc_io_desc, ARRAY_SIZE(mxc_io_desc));
  92 }
  93 #endif
  94
  95 void __init mx31_init_irq(void)
  96 {
  97         mxc_init_irq(IO_ADDRESS(AVIC_BASE_ADDR));
  98 }
  99
 100 void __init mx35_init_irq(void)
 101 {
 102         mx31_init_irq();
 103 }
 104
 105 #ifdef CONFIG_CACHE_L2X0
 106 static int mxc_init_l2x0(void)
 107 {
 108         void __iomem *l2x0_base;
 109
 110         l2x0_base = ioremap(L2CC_BASE_ADDR, 4096);
 111         if (IS_ERR(l2x0_base)) {
 112                 printk(KERN_ERR "remapping L2 cache area failed with %ld\n",
 113                                 PTR_ERR(l2x0_base));
 114                 return 0;
 115         }
 116
 117         l2x0_init(l2x0_base, 0x00030024, 0x00000000);
 118
 119         return 0;
 120 }
 121
 122 arch_initcall(mxc_init_l2x0);
 123 #endif
 124