arch/arm/mach-davinci/common.c

   1 /*
   2  * Code commons to all DaVinci SoCs.
   3  *
   4  * Author: Mark A. Greer <mgreer@mvista.com>
   5  *
   6  * 2009 (c) MontaVista Software, Inc. This file is licensed under
   7  * the terms of the GNU General Public License version 2. This program
   8  * is licensed "as is" without any warranty of any kind, whether express
   9  * or implied.
  10  */
  11 #include <linux/module.h>
  12 #include <linux/io.h>
  13
  14 #include <asm/tlb.h>
  15 #include <asm/mach/map.h>
  16
  17 #include <mach/common.h>
  18
  19 struct davinci_soc_info davinci_soc_info;
  20 EXPORT_SYMBOL(davinci_soc_info);
  21
  22 void __init davinci_common_init(struct davinci_soc_info *soc_info)
  23 {
  24         int ret;
  25
  26         if (!soc_info) {
  27                 ret = -EINVAL;
  28                 goto err;
  29         }
  30
  31         memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info));
  32
  33         if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0))
  34                 iotable_init(davinci_soc_info.io_desc,
  35                                 davinci_soc_info.io_desc_num);
  36
  37         /*
  38          * Normally devicemaps_init() would flush caches and tlb after
  39          * mdesc->map_io(), but we must also do it here because of the CPU
  40          * revision check below.
  41          */
  42         local_flush_tlb_all();
  43         flush_cache_all();
  44
  45         /*
  46          * We want to check CPU revision early for cpu_is_xxxx() macros.
  47          * IO space mapping must be initialized before we can do that.
  48          */
  49         davinci_check_revision();
  50
  51         return;
  52
  53 err:
  54         pr_err("davinci_common_init: SoC Initialization failed\n");
  55 }