MIPS: Modularize COP2 handling

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / mips / kernel / unaligned.c

diff --git a/arch/mips/kernel/unaligned.c b/arch/mips/kernel/unaligned.c
index 67bd626942ab044de7b3b6b7e7261f4e1439dc21..69b039ca8d8337e60ecead9e32fbe7bd64659a64 100644 (file)
--- a/arch/mips/kernel/unaligned.c
+++ b/arch/mips/kernel/unaligned.c
@@ -81,6 +81,7 @@
 #include <asm/asm.h>
 #include <asm/branch.h>
 #include <asm/byteorder.h>
+#include <asm/cop2.h>
 #include <asm/inst.h>
 #include <asm/uaccess.h>
 #include <asm/system.h>
@@ -451,17 +452,27 @@ static void emulate_load_store_insn(struct pt_regs *regs,
                 */
                goto sigbus;
 
+       /*
+        * COP2 is available to implementor for application specific use.
+        * It's up to applications to register a notifier chain and do
+        * whatever they have to do, including possible sending of signals.
+        */
        case lwc2_op:
+               cu2_notifier_call_chain(CU2_LWC2_OP, regs);
+               break;
+
        case ldc2_op:
+               cu2_notifier_call_chain(CU2_LDC2_OP, regs);
+               break;
+
        case swc2_op:
+               cu2_notifier_call_chain(CU2_SWC2_OP, regs);
+               break;
+
        case sdc2_op:
-               /*
-                * These are the coprocessor 2 load/stores.  The current
-                * implementations don't use cp2 and cp2 should always be
-                * disabled in c0_status.  So send SIGILL.
-                 * (No longer true: The Sony Praystation uses cp2 for
-                 * 3D matrix operations.  Dunno if that thingy has a MMU ...)
-                */
+               cu2_notifier_call_chain(CU2_SDC2_OP, regs);
+               break;
+
        default:
                /*
                 * Pheeee...  We encountered an yet unknown instruction or