[MIPS] Rewrite all the assembler interrupt handlers to C.

[linux-2.6-omap-h63xx.git] / arch / mips / ddb5xxx / ddb5477 / irq.c

diff --git a/arch/mips/ddb5xxx/ddb5477/irq.c b/arch/mips/ddb5xxx/ddb5477/irq.c
index 9ffe1a9142caef3e86c19faa03a4dd9906e94e6b..de433cf9fb5013b7c934e0b0bafef9038842e21e 100644 (file)
--- a/arch/mips/ddb5xxx/ddb5477/irq.c
+++ b/arch/mips/ddb5xxx/ddb5477/irq.c
@@ -75,7 +75,6 @@ set_pci_int_attr(u32 pci, u32 intn, u32 active, u32 trigger)
 
 extern void vrc5477_irq_init(u32 base);
 extern void mips_cpu_irq_init(u32 base);
-extern asmlinkage void ddb5477_handle_int(void);
 extern int setup_irq(unsigned int irq, struct irqaction *irqaction);
 static struct irqaction irq_cascade = { no_action, 0, CPU_MASK_NONE, "cascade", NULL, NULL };
 
@@ -135,9 +134,6 @@ void __init arch_init_irq(void)
        /* setup cascade interrupts */
        setup_irq(VRC5477_IRQ_BASE + VRC5477_I8259_CASCADE, &irq_cascade);
        setup_irq(CPU_IRQ_BASE + CPU_VRC5477_CASCADE, &irq_cascade);
-
-       /* hook up the first-level interrupt handler */
-       set_except_vector(0, ddb5477_handle_int);
 }
 
 u8 i8259_interrupt_ack(void)
@@ -159,7 +155,7 @@ u8 i8259_interrupt_ack(void)
  * the first level int-handler will jump here if it is a vrc5477 irq
  */
 #define        NUM_5477_IRQS   32
-asmlinkage void
+static void
 vrc5477_irq_dispatch(struct pt_regs *regs)
 {
        u32 intStatus;
@@ -197,3 +193,21 @@ vrc5477_irq_dispatch(struct pt_regs *regs)
                }
        }
 }
+
+#define VR5477INTS (STATUSF_IP2|STATUSF_IP3|STATUSF_IP4|STATUSF_IP5|STATUSF_IP6)
+
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+       unsigned int pending = read_c0_cause() & read_c0_status();
+
+       if (pending & STATUSF_IP7)
+               do_IRQ(CPU_IRQ_BASE + 7, regs);
+       else if (pending & VR5477INTS)
+               vrc5477_irq_dispatch(regs);
+       else if (pending & STATUSF_IP0)
+               do_IRQ(CPU_IRQ_BASE, regs);
+       else if (pending & STATUSF_IP1)
+               do_IRQ(CPU_IRQ_BASE + 1, regs);
+       else
+               spurious_interrupt(regs);
+}