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cpu.c

/* linux/arch/arm/mach-s5p6442/cpu.c
 *
 * Copyright (c) 2010 Samsung Electronics Co., Ltd.
 *          http://www.samsung.com
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
*/

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/init.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/sysdev.h>
#include <linux/serial_core.h>
#include <linux/platform_device.h>
#include <linux/sched.h>

#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>

#include <asm/proc-fns.h>

#include <mach/hardware.h>
#include <mach/map.h>
#include <asm/irq.h>

#include <plat/regs-serial.h>
#include <mach/regs-clock.h>

#include <plat/cpu.h>
#include <plat/devs.h>
#include <plat/clock.h>
#include <plat/s5p6442.h>

/* Initial IO mappings */

static struct map_desc s5p6442_iodesc[] __initdata = {
      {
            .virtual    = (unsigned long)S5P_VA_SYSTIMER,
            .pfn        = __phys_to_pfn(S5P6442_PA_SYSTIMER),
            .length           = SZ_16K,
            .type       = MT_DEVICE,
      }, {
            .virtual    = (unsigned long)S5P_VA_GPIO,
            .pfn        = __phys_to_pfn(S5P6442_PA_GPIO),
            .length           = SZ_4K,
            .type       = MT_DEVICE,
      }, {
            .virtual    = (unsigned long)VA_VIC0,
            .pfn        = __phys_to_pfn(S5P6442_PA_VIC0),
            .length           = SZ_16K,
            .type       = MT_DEVICE,
      }, {
            .virtual    = (unsigned long)VA_VIC1,
            .pfn        = __phys_to_pfn(S5P6442_PA_VIC1),
            .length           = SZ_16K,
            .type       = MT_DEVICE,
      }, {
            .virtual    = (unsigned long)VA_VIC2,
            .pfn        = __phys_to_pfn(S5P6442_PA_VIC2),
            .length           = SZ_16K,
            .type       = MT_DEVICE,
      }, {
            .virtual    = (unsigned long)S3C_VA_UART,
            .pfn        = __phys_to_pfn(S3C_PA_UART),
            .length           = SZ_512K,
            .type       = MT_DEVICE,
      }
};

static void s5p6442_idle(void)
{
      if (!need_resched())
            cpu_do_idle();

      local_irq_enable();
}

/*
 * s5p6442_map_io
 *
 * register the standard cpu IO areas
 */

void __init s5p6442_map_io(void)
{
      iotable_init(s5p6442_iodesc, ARRAY_SIZE(s5p6442_iodesc));
}

void __init s5p6442_init_clocks(int xtal)
{
      printk(KERN_DEBUG "%s: initializing clocks\n", __func__);

      s3c24xx_register_baseclocks(xtal);
      s5p_register_clocks(xtal);
      s5p6442_register_clocks();
      s5p6442_setup_clocks();
}

void __init s5p6442_init_irq(void)
{
      /* S5P6442 supports 3 VIC */
      u32 vic[3];

      /* VIC0, VIC1, and VIC2: some interrupt reserved */
      vic[0] = 0x7fefffff;
      vic[1] = 0X7f389c81;
      vic[2] = 0X1bbbcfff;

      s5p_init_irq(vic, ARRAY_SIZE(vic));
}

struct sysdev_class s5p6442_sysclass = {
      .name = "s5p6442-core",
};

static struct sys_device s5p6442_sysdev = {
      .cls  = &s5p6442_sysclass,
};

static int __init s5p6442_core_init(void)
{
      return sysdev_class_register(&s5p6442_sysclass);
}

core_initcall(s5p6442_core_init);

int __init s5p6442_init(void)
{
      printk(KERN_INFO "S5P6442: Initializing architecture\n");

      /* set idle function */
      pm_idle = s5p6442_idle;

      return sysdev_register(&s5p6442_sysdev);
}

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