arch/arm/plat-s5p/cpu.c

   1 /* linux/arch/arm/plat-s5p/cpu.c
   2  *
   3  * Copyright (c) 2009 Samsung Electronics Co., Ltd.
   4  *              http://www.samsung.com/
   5  *
   6  * S5P CPU Support
   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 version 2 as
  10  * published by the Free Software Foundation.
  11 */
  12
  13 #include <linux/init.h>
  14 #include <linux/module.h>
  15 #include <mach/map.h>
  16 #include <asm/mach/arch.h>
  17 #include <asm/mach/map.h>
  18 #include <mach/regs-clock.h>
  19 #include <plat/cpu.h>
  20 #include <plat/s5p6440.h>
  21 #include <plat/s5p6442.h>
  22 #include <plat/s5pc100.h>
  23 #include <plat/s5pv210.h>
  24
  25 /* table of supported CPUs */
  26
  27 static const char name_s5p6440[] = "S5P6440";
  28 static const char name_s5p6442[] = "S5P6442";
  29 static const char name_s5pc100[] = "S5PC100";
  30 static const char name_s5pv210[] = "S5PV210/S5PC110";
  31
  32 static struct cpu_table cpu_ids[] __initdata = {
  33         {
  34                 .idcode         = 0x56440100,
  35                 .idmask         = 0xffffff00,
  36                 .map_io         = s5p6440_map_io,
  37                 .init_clocks    = s5p6440_init_clocks,
  38                 .init_uarts     = s5p6440_init_uarts,
  39                 .init           = s5p6440_init,
  40                 .name           = name_s5p6440,
  41         }, {
  42                 .idcode         = 0x36442000,
  43                 .idmask         = 0xffffff00,
  44                 .map_io         = s5p6442_map_io,
  45                 .init_clocks    = s5p6442_init_clocks,
  46                 .init_uarts     = s5p6442_init_uarts,
  47                 .init           = s5p6442_init,
  48                 .name           = name_s5p6442,
  49         }, {
  50                 .idcode         = 0x43100000,
  51                 .idmask         = 0xfffff000,
  52                 .map_io         = s5pc100_map_io,
  53                 .init_clocks    = s5pc100_init_clocks,
  54                 .init_uarts     = s5pc100_init_uarts,
  55                 .init           = s5pc100_init,
  56                 .name           = name_s5pc100,
  57         }, {
  58                 .idcode         = 0x43110000,
  59                 .idmask         = 0xfffff000,
  60                 .map_io         = s5pv210_map_io,
  61                 .init_clocks    = s5pv210_init_clocks,
  62                 .init_uarts     = s5pv210_init_uarts,
  63                 .init           = s5pv210_init,
  64                 .name           = name_s5pv210,
  65         },
  66 };
  67
  68 /* minimal IO mapping */
  69
  70 static struct map_desc s5p_iodesc[] __initdata = {
  71         {
  72                 .virtual        = (unsigned long)S5P_VA_CHIPID,
  73                 .pfn            = __phys_to_pfn(S5P_PA_CHIPID),
  74                 .length         = SZ_4K,
  75                 .type           = MT_DEVICE,
  76         }, {
  77                 .virtual        = (unsigned long)S3C_VA_SYS,
  78                 .pfn            = __phys_to_pfn(S5P_PA_SYSCON),
  79                 .length         = SZ_64K,
  80                 .type           = MT_DEVICE,
  81         }, {
  82                 .virtual        = (unsigned long)S3C_VA_UART,
  83                 .pfn            = __phys_to_pfn(S3C_PA_UART),
  84                 .length         = SZ_4K,
  85                 .type           = MT_DEVICE,
  86         }, {
  87                 .virtual        = (unsigned long)VA_VIC0,
  88                 .pfn            = __phys_to_pfn(S5P_PA_VIC0),
  89                 .length         = SZ_16K,
  90                 .type           = MT_DEVICE,
  91         }, {
  92                 .virtual        = (unsigned long)VA_VIC1,
  93                 .pfn            = __phys_to_pfn(S5P_PA_VIC1),
  94                 .length         = SZ_16K,
  95                 .type           = MT_DEVICE,
  96         }, {
  97                 .virtual        = (unsigned long)S3C_VA_TIMER,
  98                 .pfn            = __phys_to_pfn(S5P_PA_TIMER),
  99                 .length         = SZ_16K,
 100                 .type           = MT_DEVICE,
 101         }, {
 102                 .virtual        = (unsigned long)S5P_VA_GPIO,
 103                 .pfn            = __phys_to_pfn(S5P_PA_GPIO),
 104                 .length         = SZ_4K,
 105                 .type           = MT_DEVICE,
 106         },
 107 };
 108
 109 /* read cpu identification code */
 110
 111 void __init s5p_init_io(struct map_desc *mach_desc,
 112                         int size, void __iomem *cpuid_addr)
 113 {
 114         unsigned long idcode;
 115
 116         /* initialize the io descriptors we need for initialization */
 117         iotable_init(s5p_iodesc, ARRAY_SIZE(s5p_iodesc));
 118         if (mach_desc)
 119                 iotable_init(mach_desc, size);
 120
 121         idcode = __raw_readl(cpuid_addr);
 122         s3c_init_cpu(idcode, cpu_ids, ARRAY_SIZE(cpu_ids));
 123 }