// Copyright 2006-2009 the V8 project authors. All rights reserved.
//
// Copyright IBM Corp. 2012, 2013. All rights reserved.
//
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// CPU specific code for ppc independent of OS goes here.
#include "v8.h"

#if defined(V8_TARGET_ARCH_PPC)

#include "cpu.h"
#include "macro-assembler.h"
#include "simulator.h"  // for cache flushing.

namespace v8 {
namespace internal {

void CPU::SetUp() {
  CpuFeatures::Probe();
}

bool CPU::SupportsCrankshaft() {
  return true;
}

void CPU::FlushICache(void* buffer, size_t size) {
  // Nothing to do flushing no instructions.
  if (size == 0) {
    return;
  }

#if defined (USE_SIMULATOR)
  // Not generating PPC instructions for C-code. This means that we are
  // building an PPC 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(Isolate::Current()->simulator_i_cache(), buffer, size);
#else

  intptr_t mask = kCacheLineSize - 1;
  byte *start = reinterpret_cast<byte *>(
                 reinterpret_cast<intptr_t>(buffer) & ~mask);
  byte *end = static_cast<byte *>(buffer) + size;
  for (byte *pointer = start; pointer < end; pointer += kCacheLineSize) {
    __asm__(
      "dcbf 0, %0  \n"  \
      "sync        \n"  \
      "icbi 0, %0  \n"  \
      "isync       \n"
      : /* no output */
      : "r" (pointer));
  }

#endif  // USE_SIMULATOR
}


void CPU::DebugBreak() {
  UNIMPLEMENTED();  // Unimplemented on PowerPC
}

} }  // namespace v8::internal

#endif  // V8_TARGET_ARCH_PPC