1 /* linux/arch/arm/mach-exynos4/cpu.c
3 * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
4 * http://www.samsung.com
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.
11 #include <linux/sched.h>
12 #include <linux/sysdev.h>
14 #include <asm/mach/map.h>
15 #include <asm/mach/irq.h>
17 #include <asm/proc-fns.h>
18 #include <asm/hardware/cache-l2x0.h>
19 #include <asm/hardware/gic.h>
22 #include <plat/clock.h>
23 #include <plat/devs.h>
24 #include <plat/exynos4.h>
25 #include <plat/adc-core.h>
26 #include <plat/sdhci.h>
27 #include <plat/fb-core.h>
28 #include <plat/fimc-core.h>
29 #include <plat/iic-core.h>
30 #include <plat/reset.h>
32 #include <mach/regs-irq.h>
33 #include <mach/regs-pmu.h>
35 extern int combiner_init(unsigned int combiner_nr, void __iomem *base,
36 unsigned int irq_start);
37 extern void combiner_cascade_irq(unsigned int combiner_nr, unsigned int irq);
39 /* Initial IO mappings */
40 static struct map_desc exynos4_iodesc[] __initdata = {
42 .virtual = (unsigned long)S5P_VA_SYSTIMER,
43 .pfn = __phys_to_pfn(EXYNOS4_PA_SYSTIMER),
47 .virtual = (unsigned long)S5P_VA_CMU,
48 .pfn = __phys_to_pfn(EXYNOS4_PA_CMU),
52 .virtual = (unsigned long)S5P_VA_PMU,
53 .pfn = __phys_to_pfn(EXYNOS4_PA_PMU),
57 .virtual = (unsigned long)S5P_VA_COMBINER_BASE,
58 .pfn = __phys_to_pfn(EXYNOS4_PA_COMBINER),
62 .virtual = (unsigned long)S5P_VA_COREPERI_BASE,
63 .pfn = __phys_to_pfn(EXYNOS4_PA_COREPERI),
67 .virtual = (unsigned long)S5P_VA_L2CC,
68 .pfn = __phys_to_pfn(EXYNOS4_PA_L2CC),
72 .virtual = (unsigned long)S5P_VA_GPIO1,
73 .pfn = __phys_to_pfn(EXYNOS4_PA_GPIO1),
77 .virtual = (unsigned long)S5P_VA_GPIO2,
78 .pfn = __phys_to_pfn(EXYNOS4_PA_GPIO2),
82 .virtual = (unsigned long)S5P_VA_GPIO3,
83 .pfn = __phys_to_pfn(EXYNOS4_PA_GPIO3),
87 .virtual = (unsigned long)S5P_VA_DMC0,
88 .pfn = __phys_to_pfn(EXYNOS4_PA_DMC0),
92 .virtual = (unsigned long)S3C_VA_UART,
93 .pfn = __phys_to_pfn(S3C_PA_UART),
97 .virtual = (unsigned long)S5P_VA_SROMC,
98 .pfn = __phys_to_pfn(EXYNOS4_PA_SROMC),
102 .virtual = (unsigned long)S3C_VA_USB_HSPHY,
103 .pfn = __phys_to_pfn(EXYNOS4_PA_HSPHY),
107 .virtual = (unsigned long)S5P_VA_GIC_CPU,
108 .pfn = __phys_to_pfn(EXYNOS4_PA_GIC_CPU),
112 .virtual = (unsigned long)S5P_VA_GIC_DIST,
113 .pfn = __phys_to_pfn(EXYNOS4_PA_GIC_DIST),
119 static struct map_desc exynos4_iodesc0[] __initdata = {
121 .virtual = (unsigned long)S5P_VA_SYSRAM,
122 .pfn = __phys_to_pfn(EXYNOS4_PA_SYSRAM0),
128 static struct map_desc exynos4_iodesc1[] __initdata = {
130 .virtual = (unsigned long)S5P_VA_SYSRAM,
131 .pfn = __phys_to_pfn(EXYNOS4_PA_SYSRAM1),
137 static void exynos4_idle(void)
145 static void exynos4_sw_reset(void)
147 __raw_writel(0x1, S5P_SWRESET);
153 * register the standard cpu IO areas
155 void __init exynos4_map_io(void)
157 iotable_init(exynos4_iodesc, ARRAY_SIZE(exynos4_iodesc));
159 if (soc_is_exynos4210() && samsung_rev() == EXYNOS4210_REV_0)
160 iotable_init(exynos4_iodesc0, ARRAY_SIZE(exynos4_iodesc0));
162 iotable_init(exynos4_iodesc1, ARRAY_SIZE(exynos4_iodesc1));
164 /* initialize device information early */
165 exynos4_default_sdhci0();
166 exynos4_default_sdhci1();
167 exynos4_default_sdhci2();
168 exynos4_default_sdhci3();
170 s3c_adc_setname("samsung-adc-v3");
172 s3c_fimc_setname(0, "exynos4-fimc");
173 s3c_fimc_setname(1, "exynos4-fimc");
174 s3c_fimc_setname(2, "exynos4-fimc");
175 s3c_fimc_setname(3, "exynos4-fimc");
177 /* The I2C bus controllers are directly compatible with s3c2440 */
178 s3c_i2c0_setname("s3c2440-i2c");
179 s3c_i2c1_setname("s3c2440-i2c");
180 s3c_i2c2_setname("s3c2440-i2c");
182 s5p_fb_setname(0, "exynos4-fb");
185 void __init exynos4_init_clocks(int xtal)
187 printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
189 s3c24xx_register_baseclocks(xtal);
190 s5p_register_clocks(xtal);
191 exynos4_register_clocks();
192 exynos4_setup_clocks();
195 static void exynos4_gic_irq_eoi(struct irq_data *d)
197 struct gic_chip_data *gic_data = irq_data_get_irq_chip_data(d);
199 gic_data->cpu_base = S5P_VA_GIC_CPU +
200 (EXYNOS4_GIC_BANK_OFFSET * smp_processor_id());
203 void __init exynos4_init_irq(void)
207 gic_init(0, IRQ_SPI(0), S5P_VA_GIC_DIST, S5P_VA_GIC_CPU);
208 gic_arch_extn.irq_eoi = exynos4_gic_irq_eoi;
210 for (irq = 0; irq < MAX_COMBINER_NR; irq++) {
212 combiner_init(irq, (void __iomem *)S5P_VA_COMBINER(irq),
213 COMBINER_IRQ(irq, 0));
214 combiner_cascade_irq(irq, IRQ_SPI(irq));
217 /* The parameters of s5p_init_irq() are for VIC init.
218 * Theses parameters should be NULL and 0 because EXYNOS4
219 * uses GIC instead of VIC.
221 s5p_init_irq(NULL, 0);
224 struct sysdev_class exynos4_sysclass = {
225 .name = "exynos4-core",
228 static struct sys_device exynos4_sysdev = {
229 .cls = &exynos4_sysclass,
232 static int __init exynos4_core_init(void)
234 return sysdev_class_register(&exynos4_sysclass);
237 core_initcall(exynos4_core_init);
239 #ifdef CONFIG_CACHE_L2X0
240 static int __init exynos4_l2x0_cache_init(void)
242 /* TAG, Data Latency Control: 2cycle */
243 __raw_writel(0x110, S5P_VA_L2CC + L2X0_TAG_LATENCY_CTRL);
244 __raw_writel(0x110, S5P_VA_L2CC + L2X0_DATA_LATENCY_CTRL);
246 /* L2X0 Prefetch Control */
247 __raw_writel(0x30000007, S5P_VA_L2CC + L2X0_PREFETCH_CTRL);
249 /* L2X0 Power Control */
250 __raw_writel(L2X0_DYNAMIC_CLK_GATING_EN | L2X0_STNDBY_MODE_EN,
251 S5P_VA_L2CC + L2X0_POWER_CTRL);
253 l2x0_init(S5P_VA_L2CC, 0x7C470001, 0xC200ffff);
258 early_initcall(exynos4_l2x0_cache_init);
261 int __init exynos4_init(void)
263 printk(KERN_INFO "EXYNOS4: Initializing architecture\n");
265 /* set idle function */
266 pm_idle = exynos4_idle;
268 /* set sw_reset function */
269 s5p_reset_hook = exynos4_sw_reset;
271 return sysdev_register(&exynos4_sysdev);