arch/arm/mach-s5pv210/cpu.c

   1 /* linux/arch/arm/mach-s5pv210/cpu.c
   2  *
   3  * Copyright (c) 2010 Samsung Electronics Co., Ltd.
   4  *              http://www.samsung.com/
   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/kernel.h>
  12 #include <linux/types.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/list.h>
  15 #include <linux/timer.h>
  16 #include <linux/init.h>
  17 #include <linux/module.h>
  18 #include <linux/clk.h>
  19 #include <linux/io.h>
  20 #include <linux/sysdev.h>
  21 #include <linux/platform_device.h>
  22
  23 #include <asm/mach/arch.h>
  24 #include <asm/mach/map.h>
  25 #include <asm/mach/irq.h>
  26
  27 #include <asm/proc-fns.h>
  28 #include <mach/map.h>
  29 #include <mach/regs-clock.h>
  30
  31 #include <plat/cpu.h>
  32 #include <plat/devs.h>
  33 #include <plat/clock.h>
  34 #include <plat/s5pv210.h>
  35
  36 /* Initial IO mappings */
  37
  38 static struct map_desc s5pv210_iodesc[] __initdata = {
  39         {
  40                 .virtual        = (unsigned long)S5P_VA_SYSTIMER,
  41                 .pfn            = __phys_to_pfn(S5PV210_PA_SYSTIMER),
  42                 .length         = SZ_1M,
  43                 .type           = MT_DEVICE,
  44         }, {
  45                 .virtual        = (unsigned long)VA_VIC2,
  46                 .pfn            = __phys_to_pfn(S5PV210_PA_VIC2),
  47                 .length         = SZ_16K,
  48                 .type           = MT_DEVICE,
  49         }, {
  50                 .virtual        = (unsigned long)VA_VIC3,
  51                 .pfn            = __phys_to_pfn(S5PV210_PA_VIC3),
  52                 .length         = SZ_16K,
  53                 .type           = MT_DEVICE,
  54         }, {
  55                 .virtual        = (unsigned long)S5P_VA_SROMC,
  56                 .pfn            = __phys_to_pfn(S5PV210_PA_SROMC),
  57                 .length         = SZ_4K,
  58                 .type           = MT_DEVICE,
  59         }
  60 };
  61
  62 static void s5pv210_idle(void)
  63 {
  64         if (!need_resched())
  65                 cpu_do_idle();
  66
  67         local_irq_enable();
  68 }
  69
  70 /* s5pv210_map_io
  71  *
  72  * register the standard cpu IO areas
  73 */
  74
  75 void __init s5pv210_map_io(void)
  76 {
  77         iotable_init(s5pv210_iodesc, ARRAY_SIZE(s5pv210_iodesc));
  78 }
  79
  80 void __init s5pv210_init_clocks(int xtal)
  81 {
  82         printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
  83
  84         s3c24xx_register_baseclocks(xtal);
  85         s5p_register_clocks(xtal);
  86         s5pv210_register_clocks();
  87         s5pv210_setup_clocks();
  88 }
  89
  90 void __init s5pv210_init_irq(void)
  91 {
  92         u32 vic[4];     /* S5PV210 supports 4 VIC */
  93
  94         /* All the VICs are fully populated. */
  95         vic[0] = ~0;
  96         vic[1] = ~0;
  97         vic[2] = ~0;
  98         vic[3] = ~0;
  99
 100         s5p_init_irq(vic, ARRAY_SIZE(vic));
 101 }
 102
 103 static struct sysdev_class s5pv210_sysclass = {
 104         .name   = "s5pv210-core",
 105 };
 106
 107 static struct sys_device s5pv210_sysdev = {
 108         .cls    = &s5pv210_sysclass,
 109 };
 110
 111 static int __init s5pv210_core_init(void)
 112 {
 113         return sysdev_class_register(&s5pv210_sysclass);
 114 }
 115
 116 core_initcall(s5pv210_core_init);
 117
 118 int __init s5pv210_init(void)
 119 {
 120         printk(KERN_INFO "S5PV210: Initializing architecture\n");
 121
 122         /* set idle function */
 123         pm_idle = s5pv210_idle;
 124
 125         return sysdev_register(&s5pv210_sysdev);
 126 }