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 #if V8_TARGET_ARCH_MIPS 15 16 #include "src/assembler.h" 17 #include "src/macro-assembler.h" 18 19 #include "src/simulator.h" // For cache flushing. 20 21 namespace v8 { 22 namespace internal { 23 24 FlushICache(void * start,size_t size)25 void CpuFeatures::FlushICache(void* start, size_t size) { 26 #if !defined(USE_SIMULATOR) 27 // Nothing to do, flushing no instructions. 28 if (size == 0) { 29 return; 30 } 31 32 #if defined(ANDROID) 33 // Bionic cacheflush can typically run in userland, avoiding kernel call. 34 char *end = reinterpret_cast<char *>(start) + size; 35 cacheflush( 36 reinterpret_cast<intptr_t>(start), reinterpret_cast<intptr_t>(end), 0); 37 #else // ANDROID 38 int res; 39 // See http://www.linux-mips.org/wiki/Cacheflush_Syscall. 40 res = syscall(__NR_cacheflush, start, size, ICACHE); 41 if (res) { 42 V8_Fatal(__FILE__, __LINE__, "Failed to flush the instruction cache"); 43 } 44 #endif // ANDROID 45 #endif // !USE_SIMULATOR. 46 } 47 48 } // namespace internal 49 } // namespace v8 50 51 #endif // V8_TARGET_ARCH_MIPS 52