ARM: EXYNOS4: Add support PPI in external GIC

To support PPI in external GIC of EXYNOS4 SoCs,
gic_arch_extn.irq_eoi, irq_unmask and irq_mask are
fixed. This patch is necessary because external GIC of EXYNOS4
cannot support register banking.
Signed-off-by: Changhwan Youn <chaos.youn@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/mach-exynos4/cpu.c

@@ -198,20 +198,25 @@ void __init exynos4_init_clocks(int xtal)
 	exynos4_setup_clocks();
 }
 
-static void exynos4_gic_irq_eoi(struct irq_data *d)
+static void exynos4_gic_irq_fix_base(struct irq_data *d)
 {
 	struct gic_chip_data *gic_data = irq_data_get_irq_chip_data(d);
 
 	gic_data->cpu_base = S5P_VA_GIC_CPU +
 			    (EXYNOS4_GIC_BANK_OFFSET * smp_processor_id());
+
+	gic_data->dist_base = S5P_VA_GIC_DIST +
+			    (EXYNOS4_GIC_BANK_OFFSET * smp_processor_id());
 }
 
 void __init exynos4_init_irq(void)
 {
 	int irq;
 
-	gic_init(0, IRQ_SPI(0), S5P_VA_GIC_DIST, S5P_VA_GIC_CPU);
-	gic_arch_extn.irq_eoi = exynos4_gic_irq_eoi;
+	gic_init(0, IRQ_PPI(0), S5P_VA_GIC_DIST, S5P_VA_GIC_CPU);
+	gic_arch_extn.irq_eoi = exynos4_gic_irq_fix_base;
+	gic_arch_extn.irq_unmask = exynos4_gic_irq_fix_base;
+	gic_arch_extn.irq_mask = exynos4_gic_irq_fix_base;
 
 	for (irq = 0; irq < MAX_COMBINER_NR; irq++) {