1 files changed, 59 insertions, 15 deletions

diff --git a/arch/arm/mach-ns9xxx/irq.c b/arch/arm/mach-ns9xxx/irq.c
index 00001b874e97..36e5835e6097 100644
--- a/arch/arm/mach-ns9xxx/irq.c
+++ b/arch/arm/mach-ns9xxx/irq.c
@@ -9,21 +9,27 @@
  * the Free Software Foundation.
  */
 #include <linux/interrupt.h>
+#include <linux/kernel_stat.h>
 #include <asm/io.h>
 #include <asm/mach/irq.h>
 #include <asm/mach-types.h>
-#include <asm/arch-ns9xxx/regs-sys.h>
+#include <asm/arch-ns9xxx/regs-sys-common.h>
 #include <asm/arch-ns9xxx/irqs.h>
 #include <asm/arch-ns9xxx/board.h>
 
 #include "generic.h"
 
+/* simple interrupt prio table: prio(x) < prio(y) <=> x < y */
+#define irq2prio(i) (i)
+#define prio2irq(p) (p)
+
 static void ns9xxx_mask_irq(unsigned int irq)
 {
         /* XXX: better use cpp symbols */
-        u32 ic = __raw_readl(SYS_IC(irq / 4));
-        ic &= ~(1 << (7 + 8 * (3 - (irq & 3))));
-        __raw_writel(ic, SYS_IC(irq / 4));
+        int prio = irq2prio(irq);
+        u32 ic = __raw_readl(SYS_IC(prio / 4));
+        ic &= ~(1 << (7 + 8 * (3 - (prio & 3))));
+        __raw_writel(ic, SYS_IC(prio / 4));
 }
 
 static void ns9xxx_ack_irq(unsigned int irq)
@@ -40,9 +46,10 @@ static void ns9xxx_maskack_irq(unsigned int irq)
 static void ns9xxx_unmask_irq(unsigned int irq)
 {
         /* XXX: better use cpp symbols */
-        u32 ic = __raw_readl(SYS_IC(irq / 4));
-        ic |= 1 << (7 + 8 * (3 - (irq & 3)));
-        __raw_writel(ic, SYS_IC(irq / 4));
+        int prio = irq2prio(irq);
+        u32 ic = __raw_readl(SYS_IC(prio / 4));
+        ic |= 1 << (7 + 8 * (3 - (prio & 3)));
+        __raw_writel(ic, SYS_IC(prio / 4));
 }
 
 static struct irq_chip ns9xxx_chip = {
@@ -52,24 +59,61 @@ static struct irq_chip ns9xxx_chip = {
         .unmask         = ns9xxx_unmask_irq,
 };
 
+#if 0
+#define handle_irq handle_level_irq
+#else
+void handle_prio_irq(unsigned int irq, struct irq_desc *desc)
+{
+        unsigned int cpu = smp_processor_id();
+        struct irqaction *action;
+        irqreturn_t action_ret;
+
+        spin_lock(&desc->lock);
+
+        if (unlikely(desc->status & IRQ_INPROGRESS))
+                goto out_unlock;
+
+        desc->status &= ~(IRQ_REPLAY | IRQ_WAITING);
+        kstat_cpu(cpu).irqs[irq]++;
+
+        action = desc->action;
+        if (unlikely(!action || (desc->status & IRQ_DISABLED)))
+                goto out_unlock;
+
+        desc->status |= IRQ_INPROGRESS;
+        spin_unlock(&desc->lock);
+
+        action_ret = handle_IRQ_event(irq, action);
+
+        spin_lock(&desc->lock);
+        desc->status &= ~IRQ_INPROGRESS;
+        if (!(desc->status & IRQ_DISABLED) && desc->chip->ack)
+                desc->chip->ack(irq);
+
+out_unlock:
+        spin_unlock(&desc->lock);
+}
+#define handle_irq handle_prio_irq
+#endif
+
 void __init ns9xxx_init_irq(void)
 {
         int i;
 
         /* disable all IRQs */
         for (i = 0; i < 8; ++i)
-                __raw_writel((4 * i) << 24 | (4 * i + 1) << 16 |
-                                (4 * i + 2) << 8 | (4 * i + 3), SYS_IC(i));
+                __raw_writel(prio2irq(4 * i) << 24 |
+                                prio2irq(4 * i + 1) << 16 |
+                                prio2irq(4 * i + 2) << 8 |
+                                prio2irq(4 * i + 3),
+                                SYS_IC(i));
 
-        /* simple interrupt prio table:
-         * prio(x) < prio(y) <=> x < y
-         */
         for (i = 0; i < 32; ++i)
-                __raw_writel(i, SYS_IVA(i));
+                __raw_writel(prio2irq(i), SYS_IVA(i));
 
-        for (i = IRQ_WATCHDOG; i <= IRQ_EXT3; ++i) {
+        for (i = 0; i <= 31; ++i) {
                 set_irq_chip(i, &ns9xxx_chip);
-                set_irq_handler(i, handle_level_irq);
+                set_irq_handler(i, handle_irq);
                 set_irq_flags(i, IRQF_VALID);
         }
 }