Re-establish mips basic infrastructure.

src/mips/cpu-mips.cc

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 21 matching lines @@
 
 #ifdef __mips
 #include <asm/cachectl.h>
 #endif  // #ifdef __mips
 
 #include "v8.h"
 
 #if defined(V8_TARGET_ARCH_MIPS)
 
 #include "cpu.h"
+#include "macro-assembler.h"
+
+#include "simulator.h"  // for cache flushing.

[Søren Thygesen Gjesse, 2011/03/21 16:05:19]

Please start comment with uppercase letter.

[Paul Lind, 2011/03/23 01:55:43]

Done.

 
 namespace v8 {
 namespace internal {
 
+
 void CPU::Setup() {
-  // Nothing to do.
+  CpuFeatures::Probe(true);
+  // For now just disable lithium/crankshaft.
+  if (true || !CpuFeatures::IsSupported(FPU) || Serializer::enabled()) {

[Søren Thygesen Gjesse, 2011/03/21 16:05:19]

Please remove the true here. Disabling crankshaft for MIPS should be handled by
an #ifdef/#endif in flag-definitions.h.

[Paul Lind, 2011/03/23 01:55:43]

Done.

+    V8::DisableCrankshaft();
+  }
 }
 
+
 void CPU::FlushICache(void* start, size_t size) {
-#ifdef __mips
+#if !defined (USE_SIMULATOR)
   int res;
 
   // See http://www.linux-mips.org/wiki/Cacheflush_Syscall
   res = syscall(__NR_cacheflush, start, size, ICACHE);
 
   if (res) {
     V8_Fatal(__FILE__, __LINE__, "Failed to flush the instruction cache");
   }
 
+#else  // simulator mode

[Søren Thygesen Gjesse, 2011/03/21 16:05:19]

#else comment should match the #if

[Paul Lind, 2011/03/23 01:55:43]

Done.

+  // Not generating mips instructions for C-code. This means that we are
+  // building a mips emulator based target.  We should notify the simulator
+  // that the Icache was flushed.
+  // None of this code ends up in the snapshot so there are no issues
+  // around whether or not to generate the code when building snapshots.
+  Simulator::FlushICache(start, size);
 #endif    // #ifdef __mips

[Søren Thygesen Gjesse, 2011/03/21 16:05:19]

#endif comment should match the #if

[Paul Lind, 2011/03/23 01:55:43]

Done.

 }
 
 
 void CPU::DebugBreak() {
 #ifdef __mips
   asm volatile("break");
 #endif  // #ifdef __mips
 }
 
+
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS