Home | History | Annotate | Download | only in mips64
      1 // Copyright 2012 the V8 project authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 // CPU specific code for arm independent of OS goes here.
      6 
      7 #include <sys/syscall.h>
      8 #include <unistd.h>
      9 
     10 #ifdef __mips
     11 #include <asm/cachectl.h>
     12 #endif  // #ifdef __mips
     13 
     14 #include "src/v8.h"
     15 
     16 #if V8_TARGET_ARCH_MIPS64
     17 
     18 #include "src/assembler.h"
     19 #include "src/macro-assembler.h"
     20 
     21 #include "src/simulator.h"  // For cache flushing.
     22 
     23 namespace v8 {
     24 namespace internal {
     25 
     26 
     27 void CpuFeatures::FlushICache(void* start, size_t size) {
     28   // Nothing to do, flushing no instructions.
     29   if (size == 0) {
     30     return;
     31   }
     32 
     33 #if !defined (USE_SIMULATOR)
     34 #if defined(ANDROID) && !defined(__LP64__)
     35   // Bionic cacheflush can typically run in userland, avoiding kernel call.
     36   char *end = reinterpret_cast<char *>(start) + size;
     37   cacheflush(
     38     reinterpret_cast<intptr_t>(start), reinterpret_cast<intptr_t>(end), 0);
     39 #else  // ANDROID
     40   int res;
     41   // See http://www.linux-mips.org/wiki/Cacheflush_Syscall.
     42   res = syscall(__NR_cacheflush, start, size, ICACHE);
     43   if (res) {
     44     V8_Fatal(__FILE__, __LINE__, "Failed to flush the instruction cache");
     45   }
     46 #endif  // ANDROID
     47 #else  // USE_SIMULATOR.
     48   // Not generating mips instructions for C-code. This means that we are
     49   // building a mips emulator based target.  We should notify the simulator
     50   // that the Icache was flushed.
     51   // None of this code ends up in the snapshot so there are no issues
     52   // around whether or not to generate the code when building snapshots.
     53   Simulator::FlushICache(Isolate::Current()->simulator_i_cache(), start, size);
     54 #endif  // USE_SIMULATOR.
     55 }
     56 
     57 } }  // namespace v8::internal
     58 
     59 #endif  // V8_TARGET_ARCH_MIPS64
     60