arch/arm/plat-s5pc1xx/cpu.c

   1 /* linux/arch/arm/plat-s5pc1xx/cpu.c
   2  *
   3  * Copyright 2009 Samsung Electronics Co.
   4  *      Byungho Min <bhmin@samsung.com>
   5  *
   6  * S5PC1XX CPU Support
   7  *
   8  * Based on plat-s3c64xx/cpu.c
   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/map.h>
  27
  28 #include <plat/regs-serial.h>
  29
  30 #include <plat/cpu.h>
  31 #include <plat/devs.h>
  32 #include <plat/clock.h>
  33
  34 #include <plat/s5pc100.h>
  35
  36 /* table of supported CPUs */
  37
  38 static const char name_s5pc100[] = "S5PC100";
  39
  40 static struct cpu_table cpu_ids[] __initdata = {
  41         {
  42                 .idcode         = 0x43100000,
  43                 .idmask         = 0xfffff000,
  44                 .map_io         = s5pc100_map_io,
  45                 .init_clocks    = s5pc100_init_clocks,
  46                 .init_uarts     = s5pc100_init_uarts,
  47                 .init           = s5pc100_init,
  48                 .name           = name_s5pc100,
  49         },
  50 };
  51 /* minimal IO mapping */
  52
  53 /* see notes on uart map in arch/arm/mach-s5pc100/include/mach/debug-macro.S */
  54 #define UART_OFFS (S3C_PA_UART & 0xffff)
  55
  56 static struct map_desc s5pc1xx_iodesc[] __initdata = {
  57         {
  58                 .virtual        = (unsigned long)S5PC1XX_VA_CHIPID,
  59                 .pfn            = __phys_to_pfn(S5PC1XX_PA_CHIPID),
  60                 .length         = SZ_16,
  61                 .type           = MT_DEVICE,
  62         }, {
  63                 .virtual        = (unsigned long)S5PC1XX_VA_CLK,
  64                 .pfn            = __phys_to_pfn(S5PC1XX_PA_CLK),
  65                 .length         = SZ_4K,
  66                 .type           = MT_DEVICE,
  67         }, {
  68                 .virtual        = (unsigned long)S5PC1XX_VA_PWR,
  69                 .pfn            = __phys_to_pfn(S5PC1XX_PA_PWR),
  70                 .length         = SZ_4K,
  71                 .type           = MT_DEVICE,
  72         }, {
  73                 .virtual        = (unsigned long)(S5PC1XX_VA_UART),
  74                 .pfn            = __phys_to_pfn(S5PC1XX_PA_UART),
  75                 .length         = SZ_4K,
  76                 .type           = MT_DEVICE,
  77         }, {
  78                 .virtual        = (unsigned long)S5PC1XX_VA_VIC(0),
  79                 .pfn            = __phys_to_pfn(S5PC1XX_PA_VIC(0)),
  80                 .length         = SZ_4K,
  81                 .type           = MT_DEVICE,
  82         }, {
  83                 .virtual        = (unsigned long)S5PC1XX_VA_VIC(1),
  84                 .pfn            = __phys_to_pfn(S5PC1XX_PA_VIC(1)),
  85                 .length         = SZ_4K,
  86                 .type           = MT_DEVICE,
  87         }, {
  88                 .virtual        = (unsigned long)S5PC1XX_VA_VIC(2),
  89                 .pfn            = __phys_to_pfn(S5PC1XX_PA_VIC(2)),
  90                 .length         = SZ_4K,
  91                 .type           = MT_DEVICE,
  92         }, {
  93                 .virtual        = (unsigned long)S5PC1XX_VA_TIMER,
  94                 .pfn            = __phys_to_pfn(S5PC1XX_PA_TIMER),
  95                 .length         = SZ_256,
  96                 .type           = MT_DEVICE,
  97         },
  98 };
  99
 100 /* read cpu identification code */
 101
 102 void __init s5pc1xx_init_io(struct map_desc *mach_desc, int size)
 103 {
 104         unsigned long idcode;
 105
 106         /* initialise the io descriptors we need for initialisation */
 107         iotable_init(s5pc1xx_iodesc, ARRAY_SIZE(s5pc1xx_iodesc));
 108         iotable_init(mach_desc, size);
 109
 110         idcode = __raw_readl(S5PC1XX_VA_CHIPID);
 111         s3c_init_cpu(idcode, cpu_ids, ARRAY_SIZE(cpu_ids));
 112 }