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cpu-mips.cc
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27 
28 // CPU specific code for arm independent of OS goes here.
29 
30 #include <sys/syscall.h>
31 #include <unistd.h>
32 
33 #ifdef __mips
34 #include <asm/cachectl.h>
35 #endif // #ifdef __mips
36 
37 #include "v8.h"
38 
39 #if defined(V8_TARGET_ARCH_MIPS)
40 
41 #include "cpu.h"
42 #include "macro-assembler.h"
43 
44 #include "simulator.h" // For cache flushing.
45 
46 namespace v8 {
47 namespace internal {
48 
49 
50 void CPU::SetUp() {
52 }
53 
54 
57 }
58 
59 
60 void CPU::FlushICache(void* start, size_t size) {
61  // Nothing to do, flushing no instructions.
62  if (size == 0) {
63  return;
64  }
65 
66 #if !defined (USE_SIMULATOR)
67 #if defined(ANDROID)
68  // Bionic cacheflush can typically run in userland, avoiding kernel call.
69  char *end = reinterpret_cast<char *>(start) + size;
70  cacheflush(
71  reinterpret_cast<intptr_t>(start), reinterpret_cast<intptr_t>(end), 0);
72 #else // ANDROID
73  int res;
74  // See http://www.linux-mips.org/wiki/Cacheflush_Syscall.
75  res = syscall(__NR_cacheflush, start, size, ICACHE);
76  if (res) {
77  V8_Fatal(__FILE__, __LINE__, "Failed to flush the instruction cache");
78  }
79 #endif // ANDROID
80 #else // USE_SIMULATOR.
81  // Not generating mips instructions for C-code. This means that we are
82  // building a mips emulator based target. We should notify the simulator
83  // that the Icache was flushed.
84  // None of this code ends up in the snapshot so there are no issues
85  // around whether or not to generate the code when building snapshots.
86  Simulator::FlushICache(Isolate::Current()->simulator_i_cache(), start, size);
87 #endif // USE_SIMULATOR.
88 }
89 
90 
91 void CPU::DebugBreak() {
92 #ifdef __mips
93  asm volatile("break");
94 #endif // #ifdef __mips
95 }
96 
97 
98 } } // namespace v8::internal
99 
100 #endif // V8_TARGET_ARCH_MIPS
static bool IsSupported(CpuFeature f)
void V8_Fatal(const char *file, int line, const char *format,...)
Definition: checks.cc:38
static bool SupportsCrankshaft()
static void FlushICache(void *start, size_t size)
static void DebugBreak()
static void SetUp()