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2b12b5c4 CY |
1 | /* linux/arch/arm/mach-s5pv310/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/sched.h> | |
12 | #include <linux/sysdev.h> | |
13 | ||
14 | #include <asm/mach/map.h> | |
15 | #include <asm/mach/irq.h> | |
16 | ||
17 | #include <asm/proc-fns.h> | |
18 | ||
19 | #include <plat/cpu.h> | |
20 | #include <plat/clock.h> | |
21 | #include <plat/s5pv310.h> | |
22 | ||
23 | #include <mach/regs-irq.h> | |
24 | ||
25 | void __iomem *gic_cpu_base_addr; | |
26 | ||
27 | extern int combiner_init(unsigned int combiner_nr, void __iomem *base, | |
28 | unsigned int irq_start); | |
29 | extern void combiner_cascade_irq(unsigned int combiner_nr, unsigned int irq); | |
30 | ||
31 | /* Initial IO mappings */ | |
32 | static struct map_desc s5pv310_iodesc[] __initdata = { | |
33 | { | |
34 | .virtual = (unsigned long)S5P_VA_COREPERI_BASE, | |
35 | .pfn = __phys_to_pfn(S5PV310_PA_COREPERI), | |
36 | .length = SZ_8K, | |
37 | .type = MT_DEVICE, | |
38 | }, { | |
39 | .virtual = (unsigned long)S5P_VA_COMBINER_BASE, | |
40 | .pfn = __phys_to_pfn(S5PV310_PA_COMBINER), | |
41 | .length = SZ_4K, | |
42 | .type = MT_DEVICE, | |
43 | }, { | |
44 | .virtual = (unsigned long)S5P_VA_L2CC, | |
45 | .pfn = __phys_to_pfn(S5PV310_PA_L2CC), | |
46 | .length = SZ_4K, | |
47 | .type = MT_DEVICE, | |
766211e7 CY |
48 | }, { |
49 | .virtual = (unsigned long)S5P_VA_SYSRAM, | |
50 | .pfn = __phys_to_pfn(S5PV310_PA_SYSRAM), | |
51 | .length = SZ_4K, | |
52 | .type = MT_DEVICE, | |
c598c47d KK |
53 | }, { |
54 | .virtual = (unsigned long)S5P_VA_CMU, | |
55 | .pfn = __phys_to_pfn(S5PV310_PA_CMU), | |
56 | .length = SZ_128K, | |
57 | .type = MT_DEVICE, | |
766211e7 | 58 | }, |
2b12b5c4 CY |
59 | }; |
60 | ||
61 | static void s5pv310_idle(void) | |
62 | { | |
63 | if (!need_resched()) | |
64 | cpu_do_idle(); | |
65 | ||
66 | local_irq_enable(); | |
67 | } | |
68 | ||
69 | /* s5pv310_map_io | |
70 | * | |
71 | * register the standard cpu IO areas | |
72 | */ | |
73 | void __init s5pv310_map_io(void) | |
74 | { | |
75 | iotable_init(s5pv310_iodesc, ARRAY_SIZE(s5pv310_iodesc)); | |
76 | } | |
77 | ||
78 | void __init s5pv310_init_clocks(int xtal) | |
79 | { | |
80 | printk(KERN_DEBUG "%s: initializing clocks\n", __func__); | |
81 | ||
82 | s3c24xx_register_baseclocks(xtal); | |
83 | s5p_register_clocks(xtal); | |
84 | s5pv310_register_clocks(); | |
85 | s5pv310_setup_clocks(); | |
86 | } | |
87 | ||
88 | void __init s5pv310_init_irq(void) | |
89 | { | |
90 | int irq; | |
91 | ||
92 | gic_cpu_base_addr = S5P_VA_GIC_CPU; | |
93 | gic_dist_init(0, S5P_VA_GIC_DIST, IRQ_LOCALTIMER); | |
94 | gic_cpu_init(0, S5P_VA_GIC_CPU); | |
95 | ||
96 | for (irq = 0; irq < MAX_COMBINER_NR; irq++) { | |
97 | combiner_init(irq, (void __iomem *)S5P_VA_COMBINER(irq), | |
98 | COMBINER_IRQ(irq, 0)); | |
99 | combiner_cascade_irq(irq, IRQ_SPI(irq)); | |
100 | } | |
101 | ||
102 | /* The parameters of s5p_init_irq() are for VIC init. | |
103 | * Theses parameters should be NULL and 0 because S5PV310 | |
104 | * uses GIC instead of VIC. | |
105 | */ | |
106 | s5p_init_irq(NULL, 0); | |
107 | } | |
108 | ||
109 | struct sysdev_class s5pv310_sysclass = { | |
110 | .name = "s5pv310-core", | |
111 | }; | |
112 | ||
113 | static struct sys_device s5pv310_sysdev = { | |
114 | .cls = &s5pv310_sysclass, | |
115 | }; | |
116 | ||
117 | static int __init s5pv310_core_init(void) | |
118 | { | |
119 | return sysdev_class_register(&s5pv310_sysclass); | |
120 | } | |
121 | ||
122 | core_initcall(s5pv310_core_init); | |
123 | ||
124 | int __init s5pv310_init(void) | |
125 | { | |
126 | printk(KERN_INFO "S5PV310: Initializing architecture\n"); | |
127 | ||
128 | /* set idle function */ | |
129 | pm_idle = s5pv310_idle; | |
130 | ||
131 | return sysdev_register(&s5pv310_sysdev); | |
132 | } |