Add multiple GICs support to the RealView/EB MPCore platform

This patch adds the registration of the secondary GIC on the
baseboard, together with the IRQ chaining setup.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

arch/arm/mach-realview/platsmp.c

@@ -52,7 +52,7 @@ void __cpuinit platform_secondary_init(unsigned int cpu)
 	 * core (e.g. timer irq), then they will not have been enabled
 	 * for us: do so
 	 */
-	gic_cpu_init(__io_address(REALVIEW_GIC_CPU_BASE));
+	gic_cpu_init(0, __io_address(REALVIEW_GIC_CPU_BASE));
 
 	/*
 	 * let the primary processor know we're out of the

arch/arm/mach-realview/realview_eb.c

@@ -57,7 +57,21 @@ static struct map_desc realview_eb_io_desc[] __initdata = {
 		.pfn		= __phys_to_pfn(REALVIEW_GIC_DIST_BASE),
 		.length		= SZ_4K,
 		.type		= MT_DEVICE,
+	},
+#ifdef CONFIG_REALVIEW_MPCORE
+	{
+		.virtual	= IO_ADDRESS(REALVIEW_GIC1_CPU_BASE),
+		.pfn		= __phys_to_pfn(REALVIEW_GIC1_CPU_BASE),
+		.length		= SZ_4K,
+		.type		= MT_DEVICE,
 	}, {
+		.virtual	= IO_ADDRESS(REALVIEW_GIC1_DIST_BASE),
+		.pfn		= __phys_to_pfn(REALVIEW_GIC1_DIST_BASE),
+		.length		= SZ_4K,
+		.type		= MT_DEVICE,
+	},
+#endif
+	{
 		.virtual	= IO_ADDRESS(REALVIEW_SCTL_BASE),
 		.pfn		= __phys_to_pfn(REALVIEW_SCTL_BASE),
 		.length		= SZ_4K,
@@ -143,8 +157,13 @@ static void __init gic_init_irq(void)
 	writel(pldctrl, __io_address(REALVIEW_SYS_BASE) + 0xd8);
 	writel(0x00000000, __io_address(REALVIEW_SYS_LOCK));
 #endif
-	gic_dist_init(__io_address(REALVIEW_GIC_DIST_BASE));
-	gic_cpu_init(__io_address(REALVIEW_GIC_CPU_BASE));
+	gic_dist_init(0, __io_address(REALVIEW_GIC_DIST_BASE), 29);
+	gic_cpu_init(0, __io_address(REALVIEW_GIC_CPU_BASE));
+#ifdef CONFIG_REALVIEW_MPCORE
+	gic_dist_init(1, __io_address(REALVIEW_GIC1_DIST_BASE), 64);
+	gic_cpu_init(1, __io_address(REALVIEW_GIC1_CPU_BASE));
+	gic_cascade_irq(1, IRQ_EB_IRQ1);
+#endif
 }
 
 static void __init realview_eb_init(void)

include/asm-arm/arch-realview/irqs.h

@@ -66,6 +66,9 @@
 #define IRQ_ETH			(IRQ_GIC_START + INT_ETH)
 #define IRQ_USB			(IRQ_GIC_START + INT_USB)
 
+#define IRQ_EB_IRQ1		(IRQ_GIC_START + INT_EB_IRQ1)
+#define IRQ_EB_IRQ2		(IRQ_GIC_START + INT_EB_IRQ2)
+
 #define IRQMASK_WDOGINT		INTMASK_WDOGINT
 #define IRQMASK_SOFTINT		INTMASK_SOFTINT
 #define IRQMASK_COMMRx 		INTMASK_COMMRx
@@ -103,4 +106,4 @@
 #define IRQMASK_ETH		INTMASK_ETH
 #define IRQMASK_USB		INTMASK_USB
 
-#define NR_IRQS			(IRQ_GIC_START + 64)
+#define NR_IRQS			(IRQ_GIC_START + 96)

include/asm-arm/arch-realview/platform.h

@@ -212,6 +212,8 @@
 #define REALVIEW_TWD_BASE		0x10100700
 #define REALVIEW_TWD_SIZE		0x00000100
 #define REALVIEW_GIC_DIST_BASE		0x10101000	/* Generic interrupt controller distributor */
+#define REALVIEW_GIC1_CPU_BASE        0x10040000	/* Generic interrupt controller CPU interface */
+#define REALVIEW_GIC1_DIST_BASE       0x10041000	/* Generic interrupt controller distributor */
 #endif
 #define REALVIEW_SMC_BASE             0x10080000	/* SMC */
 	/* Reserved 0x10090000 - 0x100EFFFF */
@@ -306,7 +308,11 @@
 #define INT_USB				29	/* USB controller */
 #define INT_TSPENINT			30	/* Touchscreen pen */
 #define INT_TSKPADINT			31	/* Touchscreen keypad */
+
 #else
+
+#define MAX_GIC_NR			3
+
 #define INT_AACI			0
 #define INT_TIMERINT0_1			1
 #define INT_TIMERINT2_3			2