arch/arm/plat-s5p/cpu.c

   1 /* linux/arch/arm/plat-s5p/cpu.c
   2  *
   3  * Copyright (c) 2009-2011 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
  16 #include <asm/mach/arch.h>
  17 #include <asm/mach/map.h>
  18
  19 #include <mach/map.h>
  20 #include <mach/regs-clock.h>
  21
  22 #include <plat/cpu.h>
  23 #include <plat/s5p6440.h>
  24 #include <plat/s5p6450.h>
  25 #include <plat/s5pc100.h>
  26 #include <plat/s5pv210.h>
  27 #include <plat/exynos4.h>
  28
  29 /* table of supported CPUs */
  30
  31 static const char name_s5p6440[] = "S5P6440";
  32 static const char name_s5p6450[] = "S5P6450";
  33 static const char name_s5pc100[] = "S5PC100";
  34 static const char name_s5pv210[] = "S5PV210/S5PC110";
  35 static const char name_exynos4210[] = "EXYNOS4210";
  36 static const char name_exynos4212[] = "EXYNOS4212";
  37
  38 static struct cpu_table cpu_ids[] __initdata = {
  39         {
  40                 .idcode         = S5P6440_CPU_ID,
  41                 .idmask         = S5P64XX_CPU_MASK,
  42                 .map_io         = s5p6440_map_io,
  43                 .init_clocks    = s5p6440_init_clocks,
  44                 .init_uarts     = s5p6440_init_uarts,
  45                 .init           = s5p64x0_init,
  46                 .name           = name_s5p6440,
  47         }, {
  48                 .idcode         = S5P6450_CPU_ID,
  49                 .idmask         = S5P64XX_CPU_MASK,
  50                 .map_io         = s5p6450_map_io,
  51                 .init_clocks    = s5p6450_init_clocks,
  52                 .init_uarts     = s5p6450_init_uarts,
  53                 .init           = s5p64x0_init,
  54                 .name           = name_s5p6450,
  55         }, {
  56                 .idcode         = S5PC100_CPU_ID,
  57                 .idmask         = S5PC100_CPU_MASK,
  58                 .map_io         = s5pc100_map_io,
  59                 .init_clocks    = s5pc100_init_clocks,
  60                 .init_uarts     = s5pc100_init_uarts,
  61                 .init           = s5pc100_init,
  62                 .name           = name_s5pc100,
  63         }, {
  64                 .idcode         = S5PV210_CPU_ID,
  65                 .idmask         = S5PV210_CPU_MASK,
  66                 .map_io         = s5pv210_map_io,
  67                 .init_clocks    = s5pv210_init_clocks,
  68                 .init_uarts     = s5pv210_init_uarts,
  69                 .init           = s5pv210_init,
  70                 .name           = name_s5pv210,
  71         }, {
  72                 .idcode         = EXYNOS4210_CPU_ID,
  73                 .idmask         = EXYNOS4_CPU_MASK,
  74                 .map_io         = exynos4_map_io,
  75                 .init_clocks    = exynos4_init_clocks,
  76                 .init_uarts     = exynos4_init_uarts,
  77                 .init           = exynos4_init,
  78                 .name           = name_exynos4210,
  79         }, {
  80                 .idcode         = EXYNOS4212_CPU_ID,
  81                 .idmask         = EXYNOS4_CPU_MASK,
  82                 .map_io         = exynos4_map_io,
  83                 .init_clocks    = exynos4_init_clocks,
  84                 .init_uarts     = exynos4_init_uarts,
  85                 .init           = exynos4_init,
  86                 .name           = name_exynos4212,
  87         },
  88 };
  89
  90 /* minimal IO mapping */
  91
  92 static struct map_desc s5p_iodesc[] __initdata = {
  93         {
  94                 .virtual        = (unsigned long)S5P_VA_CHIPID,
  95                 .pfn            = __phys_to_pfn(S5P_PA_CHIPID),
  96                 .length         = SZ_4K,
  97                 .type           = MT_DEVICE,
  98         }, {
  99                 .virtual        = (unsigned long)S3C_VA_SYS,
 100                 .pfn            = __phys_to_pfn(S5P_PA_SYSCON),
 101                 .length         = SZ_64K,
 102                 .type           = MT_DEVICE,
 103         }, {
 104                 .virtual        = (unsigned long)S3C_VA_TIMER,
 105                 .pfn            = __phys_to_pfn(S5P_PA_TIMER),
 106                 .length         = SZ_16K,
 107                 .type           = MT_DEVICE,
 108         }, {
 109                 .virtual        = (unsigned long)S3C_VA_WATCHDOG,
 110                 .pfn            = __phys_to_pfn(S3C_PA_WDT),
 111                 .length         = SZ_4K,
 112                 .type           = MT_DEVICE,
 113         }, {
 114                 .virtual        = (unsigned long)S5P_VA_SROMC,
 115                 .pfn            = __phys_to_pfn(S5P_PA_SROMC),
 116                 .length         = SZ_4K,
 117                 .type           = MT_DEVICE,
 118         },
 119 };
 120
 121 /* read cpu identification code */
 122
 123 void __init s5p_init_io(struct map_desc *mach_desc,
 124                         int size, void __iomem *cpuid_addr)
 125 {
 126         /* initialize the io descriptors we need for initialization */
 127         iotable_init(s5p_iodesc, ARRAY_SIZE(s5p_iodesc));
 128         if (mach_desc)
 129                 iotable_init(mach_desc, size);
 130
 131         /* detect cpu id and rev. */
 132         s5p_init_cpu(cpuid_addr);
 133
 134         s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
 135 }