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_MIPS 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) 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_MIPS 60
