arch/arm/mach-mmp/common.c

   1 /*
   2  *  linux/arch/arm/mach-mmp/common.c
   3  *
   4  *  Code common to PXA168 processor lines
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <linux/init.h>
  12 #include <linux/kernel.h>
  13 #include <linux/module.h>
  14
  15 #include <asm/page.h>
  16 #include <asm/mach/map.h>
  17 #include <mach/addr-map.h>
  18 #include <mach/cputype.h>
  19
  20 #include "common.h"
  21
  22 #define MMP_CHIPID      (AXI_VIRT_BASE + 0x82c00)
  23
  24 unsigned int mmp_chip_id;
  25 EXPORT_SYMBOL(mmp_chip_id);
  26
  27 static struct map_desc standard_io_desc[] __initdata = {
  28         {
  29                 .pfn            = __phys_to_pfn(APB_PHYS_BASE),
  30                 .virtual        = APB_VIRT_BASE,
  31                 .length         = APB_PHYS_SIZE,
  32                 .type           = MT_DEVICE,
  33         }, {
  34                 .pfn            = __phys_to_pfn(AXI_PHYS_BASE),
  35                 .virtual        = AXI_VIRT_BASE,
  36                 .length         = AXI_PHYS_SIZE,
  37                 .type           = MT_DEVICE,
  38         },
  39 };
  40
  41 void __init mmp_map_io(void)
  42 {
  43         iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
  44
  45         /* this is early, initialize mmp_chip_id here */
  46         mmp_chip_id = __raw_readl(MMP_CHIPID);
  47 }