Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 1 | // Copyright 2014 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 ppc independent of OS goes here. |
| 6 | #include "src/v8.h" |
| 7 | |
| 8 | #if V8_TARGET_ARCH_PPC |
| 9 | |
| 10 | #include "src/assembler.h" |
| 11 | #include "src/macro-assembler.h" |
| 12 | #include "src/simulator.h" // for cache flushing. |
| 13 | |
| 14 | namespace v8 { |
| 15 | namespace internal { |
| 16 | |
| 17 | void CpuFeatures::FlushICache(void* buffer, size_t size) { |
| 18 | // Nothing to do flushing no instructions. |
| 19 | if (size == 0) { |
| 20 | return; |
| 21 | } |
| 22 | |
| 23 | #if defined(USE_SIMULATOR) |
| 24 | // Not generating PPC instructions for C-code. This means that we are |
| 25 | // building an PPC emulator based target. We should notify the simulator |
| 26 | // that the Icache was flushed. |
| 27 | // None of this code ends up in the snapshot so there are no issues |
| 28 | // around whether or not to generate the code when building snapshots. |
| 29 | Simulator::FlushICache(Isolate::Current()->simulator_i_cache(), buffer, size); |
| 30 | #else |
| 31 | |
| 32 | if (CpuFeatures::IsSupported(INSTR_AND_DATA_CACHE_COHERENCY)) { |
| 33 | __asm__ __volatile__( |
| 34 | "sync \n" |
| 35 | "icbi 0, %0 \n" |
| 36 | "isync \n" |
| 37 | : /* no output */ |
| 38 | : "r"(buffer) |
| 39 | : "memory"); |
| 40 | return; |
| 41 | } |
| 42 | |
| 43 | const int kCacheLineSize = CpuFeatures::cache_line_size(); |
| 44 | intptr_t mask = kCacheLineSize - 1; |
| 45 | byte *start = |
| 46 | reinterpret_cast<byte *>(reinterpret_cast<intptr_t>(buffer) & ~mask); |
| 47 | byte *end = static_cast<byte *>(buffer) + size; |
| 48 | for (byte *pointer = start; pointer < end; pointer += kCacheLineSize) { |
| 49 | __asm__( |
| 50 | "dcbf 0, %0 \n" |
| 51 | "sync \n" |
| 52 | "icbi 0, %0 \n" |
| 53 | "isync \n" |
| 54 | : /* no output */ |
| 55 | : "r"(pointer)); |
| 56 | } |
| 57 | |
| 58 | #endif // USE_SIMULATOR |
| 59 | } |
| 60 | } |
| 61 | } // namespace v8::internal |
| 62 | |
| 63 | #endif // V8_TARGET_ARCH_PPC |