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

Saves like 1,600 lines of code, is way easier to debug, compilers
frequently do a better job than the cut and paste type of handlers many
boards had.  And finally having all the stuff done in a single place
also means alot of bug potencial for the MT ASE is gone.

The only surviving handler in assembler is the DECstation one; I hope
Maciej will rewrite it.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 22 insertions, 5 deletions

diff --git a/arch/mips/sgi-ip27/ip27-irq.c b/arch/mips/sgi-ip27/ip27-irq.c
index 2854ac4c9be1..2e643d2f51cb 100644
--- a/arch/mips/sgi-ip27/ip27-irq.c
+++ b/arch/mips/sgi-ip27/ip27-irq.c
@@ -130,7 +130,7 @@ static int ms1bit(unsigned long x)
  * Kanoj 05.13.00
  */
 
-void ip27_do_irq_mask0(struct pt_regs *regs)
+static void ip27_do_irq_mask0(struct pt_regs *regs)
 {
         int irq, swlevel;
         hubreg_t pend0, mask0;
@@ -171,7 +171,7 @@ void ip27_do_irq_mask0(struct pt_regs *regs)
         LOCAL_HUB_L(PI_INT_PEND0);
 }
 
-void ip27_do_irq_mask1(struct pt_regs *regs)
+static void ip27_do_irq_mask1(struct pt_regs *regs)
 {
         int irq, swlevel;
         hubreg_t pend1, mask1;
@@ -196,12 +196,12 @@ void ip27_do_irq_mask1(struct pt_regs *regs)
         LOCAL_HUB_L(PI_INT_PEND1);
 }
 
-void ip27_prof_timer(struct pt_regs *regs)
+static void ip27_prof_timer(struct pt_regs *regs)
 {
         panic("CPU %d got a profiling interrupt", smp_processor_id());
 }
 
-void ip27_hub_error(struct pt_regs *regs)
+static void ip27_hub_error(struct pt_regs *regs)
 {
         panic("CPU %d got a hub error interrupt", smp_processor_id());
 }
@@ -421,9 +421,26 @@ int __devinit request_bridge_irq(struct bridge_controller *bc)
         return irq;
 }
 
+extern void ip27_rt_timer_interrupt(struct pt_regs *regs);
+
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+        unsigned long pending = read_c0_cause() & read_c0_status();
+
+        if (pending & CAUSEF_IP4)
+                ip27_rt_timer_interrupt(regs);
+        else if (pending & CAUSEF_IP2)  /* PI_INT_PEND_0 or CC_PEND_{A|B} */
+                ip27_do_irq_mask0(regs);
+        else if (pending & CAUSEF_IP3)  /* PI_INT_PEND_1 */
+                ip27_do_irq_mask1(regs);
+        else if (pending & CAUSEF_IP5)
+                ip27_prof_timer(regs);
+        else if (pending & CAUSEF_IP6)
+                ip27_hub_error(regs);
+}
+
 void __init arch_init_irq(void)
 {
-        set_except_vector(0, ip27_irq);
 }
 
 void install_ipi(void)