cpu.c
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/* 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);
}