ARM: PRIMA2: irq: make prima2 irq can work even we enable GIC for Marco

in Marco, we will use GIC. this patch prepares the handle_irq for prima2
to avoid the compiling errors since we want only one defconfig and zImage
for both prima2 and marco that means we will need handle_irq for both.
Signed-off-by: Baohua Song <Baohua.Song@csr.com>

arch/arm/mach-prima2/common.c

@@ -41,6 +41,9 @@ DT_MACHINE_START(PRIMA2_DT, "Generic PRIMA2 (Flattened Device Tree)")
 	.map_io         = sirfsoc_map_lluart,
 	.init_irq	= sirfsoc_of_irq_init,
 	.init_time	= sirfsoc_prima2_timer_init,
+#ifdef CONFIG_MULTI_IRQ_HANDLER
+	.handle_irq     = sirfsoc_handle_irq,
+#endif
 	.dma_zone_size	= SZ_256M,
 	.init_machine	= sirfsoc_mach_init,
 	.init_late	= sirfsoc_init_late,

arch/arm/mach-prima2/common.h

@@ -11,12 +11,14 @@
 
 #include <linux/init.h>
 #include <asm/mach/time.h>
+#include <asm/exception.h>
 
 extern void sirfsoc_prima2_timer_init(void);
 
 extern void __init sirfsoc_of_irq_init(void);
 extern void __init sirfsoc_of_clk_init(void);
 extern void sirfsoc_restart(char, const char *);
+extern asmlinkage void __exception_irq_entry sirfsoc_handle_irq(struct pt_regs *regs);
 
 #ifndef CONFIG_DEBUG_LL
 static inline void sirfsoc_map_lluart(void)  {}

arch/arm/mach-prima2/include/mach/irqs.h

@@ -10,8 +10,8 @@
 #define __ASM_ARCH_IRQS_H
 
 #define SIRFSOC_INTENAL_IRQ_START  0
-#define SIRFSOC_INTENAL_IRQ_END    59
+#define SIRFSOC_INTENAL_IRQ_END    127
 #define SIRFSOC_GPIO_IRQ_START     (SIRFSOC_INTENAL_IRQ_END + 1)
-#define NR_IRQS	220
+#define NR_IRQS	288
 
 #endif

arch/arm/mach-prima2/irq.c

@@ -9,17 +9,19 @@
 #include <linux/init.h>
 #include <linux/io.h>
 #include <linux/irq.h>
-#include <mach/hardware.h>
-#include <asm/mach/irq.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/irqdomain.h>
 #include <linux/syscore_ops.h>
+#include <asm/mach/irq.h>
+#include <asm/exception.h>
+#include <mach/hardware.h>
 
 #define SIRFSOC_INT_RISC_MASK0          0x0018
 #define SIRFSOC_INT_RISC_MASK1          0x001C
 #define SIRFSOC_INT_RISC_LEVEL0         0x0020
 #define SIRFSOC_INT_RISC_LEVEL1         0x0024
+#define SIRFSOC_INIT_IRQ_ID		0x0038
 
 void __iomem *sirfsoc_intc_base;
 
@@ -52,6 +54,16 @@ static __init void sirfsoc_irq_init(void)
 	writel_relaxed(0, sirfsoc_intc_base + SIRFSOC_INT_RISC_MASK1);
 }
 
+asmlinkage void __exception_irq_entry sirfsoc_handle_irq(struct pt_regs *regs)
+{
+	u32 irqstat, irqnr;
+
+	irqstat = readl_relaxed(sirfsoc_intc_base + SIRFSOC_INIT_IRQ_ID);
+	irqnr = irqstat & 0xff;
+
+	handle_IRQ(irqnr, regs);
+}
+
 static struct of_device_id intc_ids[]  = {
 	{ .compatible = "sirf,prima2-intc" },
 	{},