linux 2.6.16.38 w/ vs2.0.3-rc1

[linux-2.6.git] / arch / mips / sgi-ip32 / ip32-irq.c

diff --git a/arch/mips/sgi-ip32/ip32-irq.c b/arch/mips/sgi-ip32/ip32-irq.c
index 8ba0804..2eb22d6 100644 (file)
--- a/arch/mips/sgi-ip32/ip32-irq.c
+++ b/arch/mips/sgi-ip32/ip32-irq.c
@@ -31,12 +31,12 @@
 /* issue a PIO read to make sure no PIO writes are pending */
 static void inline flush_crime_bus(void)
 {
-       crime->control;
+       volatile unsigned long junk = crime->control;
 }
 
 static void inline flush_mace_bus(void)
 {
-       mace->perif.ctrl.misc;
+       volatile unsigned long junk = mace->perif.ctrl.misc;
 }
 
 #undef DEBUG_IRQ
@@ -130,6 +130,8 @@ struct irqaction memerr_irq = { crime_memerr_intr, SA_INTERRUPT,
 struct irqaction cpuerr_irq = { crime_cpuerr_intr, SA_INTERRUPT,
                        CPU_MASK_NONE, "CRIME CPU error", NULL, NULL };
 
+extern void ip32_handle_int(void);
+
 /*
  * For interrupts wired from a single device to the CPU.  Only the clock
  * uses this it seems, which is IRQ 0 and IP7.
@@ -501,67 +503,48 @@ static void ip32_unknown_interrupt(struct pt_regs *regs)
 
 /* CRIME 1.1 appears to deliver all interrupts to this one pin. */
 /* change this to loop over all edge-triggered irqs, exception masked out ones */
-static void ip32_irq0(struct pt_regs *regs)
+void ip32_irq0(struct pt_regs *regs)
 {
        uint64_t crime_int;
        int irq = 0;
 
        crime_int = crime->istat & crime_mask;
-       irq = __ffs(crime_int);
-       crime_int = 1 << irq;
+       irq = ffs(crime_int);
+       crime_int = 1 << (irq - 1);
 
        if (crime_int & CRIME_MACEISA_INT_MASK) {
                unsigned long mace_int = mace->perif.ctrl.istat;
-               irq = __ffs(mace_int & maceisa_mask) + 32;
+               irq = ffs(mace_int & maceisa_mask) + 32;
        }
-       irq++;
        DBG("*irq %u*\n", irq);
        do_IRQ(irq, regs);
 }
 
-static void ip32_irq1(struct pt_regs *regs)
+void ip32_irq1(struct pt_regs *regs)
 {
        ip32_unknown_interrupt(regs);
 }
 
-static void ip32_irq2(struct pt_regs *regs)
+void ip32_irq2(struct pt_regs *regs)
 {
        ip32_unknown_interrupt(regs);
 }
 
-static void ip32_irq3(struct pt_regs *regs)
+void ip32_irq3(struct pt_regs *regs)
 {
        ip32_unknown_interrupt(regs);
 }
 
-static void ip32_irq4(struct pt_regs *regs)
+void ip32_irq4(struct pt_regs *regs)
 {
        ip32_unknown_interrupt(regs);
 }
 
-static void ip32_irq5(struct pt_regs *regs)
+void ip32_irq5(struct pt_regs *regs)
 {
        ll_timer_interrupt(IP32_R4K_TIMER_IRQ, regs);
 }
 
-asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
-{
-       unsigned int pending = read_c0_cause();
-
-       if (likely(pending & IE_IRQ0))
-               ip32_irq0(regs);
-       else if (unlikely(pending & IE_IRQ1))
-               ip32_irq1(regs);
-       else if (unlikely(pending & IE_IRQ2))
-               ip32_irq2(regs);
-       else if (unlikely(pending & IE_IRQ3))
-               ip32_irq3(regs);
-       else if (unlikely(pending & IE_IRQ4))
-               ip32_irq4(regs);
-       else if (likely(pending & IE_IRQ5))
-               ip32_irq5(regs);
-}
-
 void __init arch_init_irq(void)
 {
        unsigned int irq;
@@ -573,6 +556,7 @@ void __init arch_init_irq(void)
        crime->soft_int = 0;
        mace->perif.ctrl.istat = 0;
        mace->perif.ctrl.imask = 0;
+       set_except_vector(0, ip32_handle_int);
 
        for (irq = 0; irq <= IP32_IRQ_MAX; irq++) {
                hw_irq_controller *controller;