[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>

2 files changed, 16 insertions, 0 deletions

diff --git a/arch/mips/kernel/genex.S b/arch/mips/kernel/genex.S
index 13f22d1d0e8b..04418b6568b0 100644
--- a/arch/mips/kernel/genex.S
+++ b/arch/mips/kernel/genex.S
@@ -122,6 +122,20 @@ handle_vcei:
         .set    pop
         END(except_vec3_r4000)
 
+        __FINIT
+
+        .align  5
+NESTED(handle_int, PT_SIZE, sp)
+        SAVE_ALL
+        CLI
+
+        PTR_LA  ra, ret_from_irq
+        move    a0, sp
+        j       plat_irq_dispatch
+        END(handle_int)
+
+        __INIT
+
 /*
  * Special interrupt vector for MIPS64 ISA & embedded MIPS processors.
  * This is a dedicated interrupt exception vector which reduces the
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 857319085255..61efc61c45e2 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -42,6 +42,7 @@
 #include <asm/watch.h>
 #include <asm/types.h>
 
+extern asmlinkage void handle_int(void);
 extern asmlinkage void handle_tlbm(void);
 extern asmlinkage void handle_tlbl(void);
 extern asmlinkage void handle_tlbs(void);
@@ -1296,6 +1297,7 @@ void __init trap_init(void)
         if (board_be_init)
                 board_be_init();
 
+        set_except_vector(0, handle_int);
         set_except_vector(1, handle_tlbm);
         set_except_vector(2, handle_tlbl);
         set_except_vector(3, handle_tlbs);