[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, 18 insertions, 3 deletions

diff --git a/arch/mips/tx4938/common/irq.c b/arch/mips/tx4938/common/irq.c
index 4f90d7faf634..873805178d8e 100644
--- a/arch/mips/tx4938/common/irq.c
+++ b/arch/mips/tx4938/common/irq.c
@@ -392,11 +392,8 @@ tx4938_irq_pic_end(unsigned int irq)
 void __init
 tx4938_irq_init(void)
 {
-        extern asmlinkage void tx4938_irq_handler(void);
-
         tx4938_irq_cp0_init();
         tx4938_irq_pic_init();
-        set_except_vector(0, tx4938_irq_handler);
 
         return;
 }
@@ -422,3 +419,21 @@ tx4938_irq_nested(void)
         wbflush();
         return (sw_irq);
 }
+
+asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
+{
+        unsigned int pending = read_c0_cause() & read_c0_status();
+
+        if (pending & STATUSF_IP7)
+                do_IRQ(TX4938_IRQ_CPU_TIMER, regs);
+        else if (pending & STATUSF_IP2) {
+                int irq = tx4938_irq_nested();
+                if (irq)
+                        do_IRQ(irq, regs);
+                else
+                        spurious_interrupt(regs);
+        } else if (pending & STATUSF_IP1)
+                do_IRQ(TX4938_IRQ_USER1, regs);
+        else if (pending & STATUSF_IP0)
+                do_IRQ(TX4938_IRQ_USER0, regs);
+}