kernel/2.6.29.6-aldebaran-rt/arch/arm/plat-s3c64xx/cpu.c

   1 /* linux/arch/arm/plat-s3c64xx/cpu.c
   2  *
   3  * Copyright 2008 Openmoko, Inc.
   4  * Copyright 2008 Simtec Electronics
   5  *      Ben Dooks <ben@simtec.co.uk>
   6  *      http://armlinux.simtec.co.uk/
   7  *
   8  * S3C64XX CPU Support
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13 */
  14
  15 #include <linux/init.h>
  16 #include <linux/module.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/ioport.h>
  19 #include <linux/serial_core.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/io.h>
  22
  23 #include <mach/hardware.h>
  24 #include <mach/map.h>
  25
  26 #include <asm/mach/arch.h>
  27 #include <asm/mach/map.h>
  28
  29 #include <plat/regs-serial.h>
  30
  31 #include <plat/cpu.h>
  32 #include <plat/devs.h>
  33 #include <plat/clock.h>
  34
  35 #include <plat/s3c6400.h>
  36 #include <plat/s3c6410.h>
  37
  38 /* table of supported CPUs */
  39
  40 static const char name_s3c6400[] = "S3C6400";
  41 static const char name_s3c6410[] = "S3C6410";
  42
  43 static struct cpu_table cpu_ids[] __initdata = {
  44         {
  45                 .idcode         = 0x36400000,
  46                 .idmask         = 0xfffff000,
  47                 .map_io         = s3c6400_map_io,
  48                 .init_clocks    = s3c6400_init_clocks,
  49                 .init_uarts     = s3c6400_init_uarts,
  50                 .init           = s3c6400_init,
  51                 .name           = name_s3c6400,
  52         }, {
  53                 .idcode         = 0x36410100,
  54                 .idmask         = 0xffffff00,
  55                 .map_io         = s3c6410_map_io,
  56                 .init_clocks    = s3c6410_init_clocks,
  57                 .init_uarts     = s3c6410_init_uarts,
  58                 .init           = s3c6410_init,
  59                 .name           = name_s3c6410,
  60         },
  61 };
  62
  63 /* minimal IO mapping */
  64
  65 /* see notes on uart map in arch/arm/mach-s3c6400/include/mach/debug-macro.S */
  66 #define UART_OFFS (S3C_PA_UART & 0xfffff)
  67
  68 static struct map_desc s3c_iodesc[] __initdata = {
  69         {
  70                 .virtual        = (unsigned long)S3C_VA_SYS,
  71                 .pfn            = __phys_to_pfn(S3C64XX_PA_SYSCON),
  72                 .length         = SZ_4K,
  73                 .type           = MT_DEVICE,
  74         }, {
  75                 .virtual        = (unsigned long)(S3C_VA_UART + UART_OFFS),
  76                 .pfn            = __phys_to_pfn(S3C_PA_UART),
  77                 .length         = SZ_4K,
  78                 .type           = MT_DEVICE,
  79         }, {
  80                 .virtual        = (unsigned long)S3C_VA_VIC0,
  81                 .pfn            = __phys_to_pfn(S3C64XX_PA_VIC0),
  82                 .length         = SZ_16K,
  83                 .type           = MT_DEVICE,
  84         }, {
  85                 .virtual        = (unsigned long)S3C_VA_VIC1,
  86                 .pfn            = __phys_to_pfn(S3C64XX_PA_VIC1),
  87                 .length         = SZ_16K,
  88                 .type           = MT_DEVICE,
  89         }, {
  90                 .virtual        = (unsigned long)S3C_VA_TIMER,
  91                 .pfn            = __phys_to_pfn(S3C_PA_TIMER),
  92                 .length         = SZ_16K,
  93                 .type           = MT_DEVICE,
  94         }, {
  95                 .virtual        = (unsigned long)S3C64XX_VA_GPIO,
  96                 .pfn            = __phys_to_pfn(S3C64XX_PA_GPIO),
  97                 .length         = SZ_4K,
  98                 .type           = MT_DEVICE,
  99         },
 100 };
 101
 102 /* read cpu identification code */
 103
 104 void __init s3c64xx_init_io(struct map_desc *mach_desc, int size)
 105 {
 106         unsigned long idcode;
 107
 108         /* initialise the io descriptors we need for initialisation */
 109         iotable_init(s3c_iodesc, ARRAY_SIZE(s3c_iodesc));
 110         iotable_init(mach_desc, size);
 111
 112         idcode = __raw_readl(S3C_VA_SYS + 0x118);
 113         s3c_init_cpu(idcode, cpu_ids, ARRAY_SIZE(cpu_ids));
 114 }