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  • only in /netgear-R7000-V1.0.7.12_1.2.5/components/opensource/linux/linux-2.6.36/arch/arm/mach-s5p6442/
1/* linux/arch/arm/mach-s5p6442/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/clk.h>
18#include <linux/io.h>
19#include <linux/sysdev.h>
20#include <linux/serial_core.h>
21#include <linux/platform_device.h>
22#include <linux/sched.h>
23
24#include <asm/mach/arch.h>
25#include <asm/mach/map.h>
26#include <asm/mach/irq.h>
27
28#include <asm/proc-fns.h>
29
30#include <mach/hardware.h>
31#include <mach/map.h>
32#include <asm/irq.h>
33
34#include <plat/regs-serial.h>
35#include <mach/regs-clock.h>
36
37#include <plat/cpu.h>
38#include <plat/devs.h>
39#include <plat/clock.h>
40#include <plat/s5p6442.h>
41
42/* Initial IO mappings */
43
44static struct map_desc s5p6442_iodesc[] __initdata = {
45	{
46		.virtual	= (unsigned long)S5P_VA_SYSTIMER,
47		.pfn		= __phys_to_pfn(S5P6442_PA_SYSTIMER),
48		.length		= SZ_16K,
49		.type		= MT_DEVICE,
50	}, {
51		.virtual	= (unsigned long)VA_VIC2,
52		.pfn		= __phys_to_pfn(S5P6442_PA_VIC2),
53		.length		= SZ_16K,
54		.type		= MT_DEVICE,
55	}
56};
57
58static void s5p6442_idle(void)
59{
60	if (!need_resched())
61		cpu_do_idle();
62
63	local_irq_enable();
64}
65
66/* s5p6442_map_io
67 *
68 * register the standard cpu IO areas
69*/
70
71void __init s5p6442_map_io(void)
72{
73	iotable_init(s5p6442_iodesc, ARRAY_SIZE(s5p6442_iodesc));
74}
75
76void __init s5p6442_init_clocks(int xtal)
77{
78	printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
79
80	s3c24xx_register_baseclocks(xtal);
81	s5p_register_clocks(xtal);
82	s5p6442_register_clocks();
83	s5p6442_setup_clocks();
84}
85
86void __init s5p6442_init_irq(void)
87{
88	/* S5P6442 supports 3 VIC */
89	u32 vic[3];
90
91	/* VIC0, VIC1, and VIC2: some interrupt reserved */
92	vic[0] = 0x7fefffff;
93	vic[1] = 0X7f389c81;
94	vic[2] = 0X1bbbcfff;
95
96	s5p_init_irq(vic, ARRAY_SIZE(vic));
97}
98
99struct sysdev_class s5p6442_sysclass = {
100	.name	= "s5p6442-core",
101};
102
103static struct sys_device s5p6442_sysdev = {
104	.cls	= &s5p6442_sysclass,
105};
106
107static int __init s5p6442_core_init(void)
108{
109	return sysdev_class_register(&s5p6442_sysclass);
110}
111
112core_initcall(s5p6442_core_init);
113
114int __init s5p6442_init(void)
115{
116	printk(KERN_INFO "S5P6442: Initializing architecture\n");
117
118	/* set idle function */
119	pm_idle = s5p6442_idle;
120
121	return sysdev_register(&s5p6442_sysdev);
122}
123