ARM: S5PV310: Add new CPU initialization support

This patch adds Samsung S5PV310/S5PC210 CPU support.
The S5PV310/S5PC210 integrates a ARM Cortex A9 multi-core.

Signed-off-by: Changhwan Youn <chaos.youn@samsung.com>
Signed-off-by: Jongpill Lee <boyko.lee@samsung.com>
Signed-off-by: Jiseong Oh <jiseong.oh@samsung.com>
[kgene.kim@samsung.com: fix build errors]
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

1 files changed, 122 insertions, 0 deletions

diff --git a/arch/arm/mach-s5pv310/cpu.c b/arch/arm/mach-s5pv310/cpu.c
new file mode 100644
index 000000000000..196c9f12ed85
--- /dev/null
+++ b/arch/arm/mach-s5pv310/cpu.c
@@ -0,0 +1,122 @@
+/* linux/arch/arm/mach-s5pv310/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/sched.h>
+#include <linux/sysdev.h>
+
+#include <asm/mach/map.h>
+#include <asm/mach/irq.h>
+
+#include <asm/proc-fns.h>
+
+#include <plat/cpu.h>
+#include <plat/clock.h>
+#include <plat/s5pv310.h>
+
+#include <mach/regs-irq.h>
+
+void __iomem *gic_cpu_base_addr;
+
+extern int combiner_init(unsigned int combiner_nr, void __iomem *base,
+                         unsigned int irq_start);
+extern void combiner_cascade_irq(unsigned int combiner_nr, unsigned int irq);
+
+/* Initial IO mappings */
+static struct map_desc s5pv310_iodesc[] __initdata = {
+        {
+                .virtual        = (unsigned long)S5P_VA_COREPERI_BASE,
+                .pfn            = __phys_to_pfn(S5PV310_PA_COREPERI),
+                .length         = SZ_8K,
+                .type           = MT_DEVICE,
+        }, {
+                .virtual        = (unsigned long)S5P_VA_COMBINER_BASE,
+                .pfn            = __phys_to_pfn(S5PV310_PA_COMBINER),
+                .length         = SZ_4K,
+                .type           = MT_DEVICE,
+        }, {
+                .virtual        = (unsigned long)S5P_VA_L2CC,
+                .pfn            = __phys_to_pfn(S5PV310_PA_L2CC),
+                .length         = SZ_4K,
+                .type           = MT_DEVICE,
+        },
+};
+
+static void s5pv310_idle(void)
+{
+        if (!need_resched())
+                cpu_do_idle();
+
+        local_irq_enable();
+}
+
+/* s5pv310_map_io
+ *
+ * register the standard cpu IO areas
+*/
+void __init s5pv310_map_io(void)
+{
+        iotable_init(s5pv310_iodesc, ARRAY_SIZE(s5pv310_iodesc));
+}
+
+void __init s5pv310_init_clocks(int xtal)
+{
+        printk(KERN_DEBUG "%s: initializing clocks\n", __func__);
+
+        s3c24xx_register_baseclocks(xtal);
+        s5p_register_clocks(xtal);
+        s5pv310_register_clocks();
+        s5pv310_setup_clocks();
+}
+
+void __init s5pv310_init_irq(void)
+{
+        int irq;
+
+        gic_cpu_base_addr = S5P_VA_GIC_CPU;
+        gic_dist_init(0, S5P_VA_GIC_DIST, IRQ_LOCALTIMER);
+        gic_cpu_init(0, S5P_VA_GIC_CPU);
+
+        for (irq = 0; irq < MAX_COMBINER_NR; irq++) {
+                combiner_init(irq, (void __iomem *)S5P_VA_COMBINER(irq),
+                                COMBINER_IRQ(irq, 0));
+                combiner_cascade_irq(irq, IRQ_SPI(irq));
+        }
+
+        /* The parameters of s5p_init_irq() are for VIC init.
+         * Theses parameters should be NULL and 0 because S5PV310
+         * uses GIC instead of VIC.
+         */
+        s5p_init_irq(NULL, 0);
+}
+
+struct sysdev_class s5pv310_sysclass = {
+        .name   = "s5pv310-core",
+};
+
+static struct sys_device s5pv310_sysdev = {
+        .cls    = &s5pv310_sysclass,
+};
+
+static int __init s5pv310_core_init(void)
+{
+        return sysdev_class_register(&s5pv310_sysclass);
+}
+
+core_initcall(s5pv310_core_init);
+
+int __init s5pv310_init(void)
+{
+        printk(KERN_INFO "S5PV310: Initializing architecture\n");
+
+        /* set idle function */
+        pm_idle = s5pv310_idle;
+
+        return sysdev_register(&s5pv310_sysdev);
+}