Changeset ffc277e in mainline for arch/mips/src/exception.c

Timestamp:

2005-09-10T00:52:13Z (20 years ago)

Author:

Ondrej Palkovsky <ondrap@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

f3a6c8e5

Parents:

b02e5d1

Message:

Cleanup of makefiles to have common options in one main makefile.

Add simple build process for different simulators for MIPS.
Added FPU context & lazy FPU context switching to MIPS.
Cleanup of MIPS linker script.
Moved MIPS kernel above 1MB. Not tested on real machine yet, but it might help.

There is something broken with gcc inlined memcpy (either simulator or gcc), it is disabled on BigEndian mips now.

File:

• arch/mips/src/exception.c (modified) (3 diffs)

arch/mips/src/exception.c

@@ -52 +52 @@
         cp0_status_write(cp0_status_read() & ~ (cp0_status_exl_exception_bit |
                                                 cp0_status_um_bit));
+        /* Save pstate so that the threads can access it */
+        if (THREAD)
+                THREAD->pstate = pstate;
 
         /* decode exception number and process the exception */
@@ -86 +89 @@
                         break;
                 case EXC_CpU:
+#ifdef FPU_LAZY     
+                        scheduler_fpu_lazy_request();
+#else
                         panic("unhandled Coprocessor Unusable Exception\n");
+#endif
                         break;
                 case EXC_Ov:
@@ -111 +118 @@
         
         pstate->epc += epc_shift;
+        /* Probable not needed, but just for sure that nobody 
+         * will continue accessing it */
+        if (THREAD)
+                THREAD->pstate = NULL;
 }