Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/runtime/icache.hpp@fb57d4cf76c2 (annotated)
src/share/vm/runtime/icache.hpp
Tue, 11 May 2010 14:35:43 -0700
- author
- prr
- date
- Tue, 11 May 2010 14:35:43 -0700
- changeset 1840
- fb57d4cf76c2
- parent 435
- a61af66fc99e
- child 1907
- c18cbe5936b8
- permissions
- -rw-r--r--
6931180: Migration to recent versions of MS Platform SDK
6951582: Build problems on win64
Summary: Changes to enable building JDK7 with Microsoft Visual Studio 2010
Reviewed-by: ohair, art, ccheung, dcubed
| duke@435 | 1 | /* |
| duke@435 | 2 | * Copyright 1997-2004 Sun Microsystems, Inc. All Rights Reserved. |
| duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| duke@435 | 4 | * |
| duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
| duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| duke@435 | 7 | * published by the Free Software Foundation. |
| duke@435 | 8 | * |
| duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| duke@435 | 13 | * accompanied this code). |
| duke@435 | 14 | * |
| duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
| duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| duke@435 | 18 | * |
| duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| duke@435 | 21 | * have any questions. |
| duke@435 | 22 | * |
| duke@435 | 23 | */ |
| duke@435 | 24 | |
| duke@435 | 25 | // Interface for updating the instruction cache. Whenever the VM modifies |
| duke@435 | 26 | // code, part of the processor instruction cache potentially has to be flushed. |
| duke@435 | 27 | |
| duke@435 | 28 | // Default implementation is in icache.cpp, and can be hidden per-platform. |
| duke@435 | 29 | // Most platforms must provide only ICacheStubGenerator::generate_icache_flush(). |
| duke@435 | 30 | // Platforms that don't require icache flushing can just nullify the public |
| duke@435 | 31 | // members of AbstractICache in their ICache class. AbstractICache should never |
| duke@435 | 32 | // be referenced other than by deriving the ICache class from it. |
| duke@435 | 33 | // |
| duke@435 | 34 | // The code for the ICache class and for generate_icache_flush() must be in |
| duke@435 | 35 | // architecture-specific files, i.e., icache_<arch>.hpp/.cpp |
| duke@435 | 36 | |
| duke@435 | 37 | class AbstractICache : AllStatic { |
| duke@435 | 38 | public: |
| duke@435 | 39 | // The flush stub signature |
| duke@435 | 40 | typedef int (*flush_icache_stub_t)(address addr, int lines, int magic); |
| duke@435 | 41 | |
| duke@435 | 42 | protected: |
| duke@435 | 43 | // The flush stub function address |
| duke@435 | 44 | static flush_icache_stub_t _flush_icache_stub; |
| duke@435 | 45 | |
| duke@435 | 46 | // Call the flush stub |
| duke@435 | 47 | static void call_flush_stub(address start, int lines); |
| duke@435 | 48 | |
| duke@435 | 49 | public: |
| duke@435 | 50 | enum { |
| duke@435 | 51 | stub_size = 0, // Size of the icache flush stub in bytes |
| duke@435 | 52 | line_size = 0, // Icache line size in bytes |
| duke@435 | 53 | log2_line_size = 0 // log2(line_size) |
| duke@435 | 54 | }; |
| duke@435 | 55 | |
| duke@435 | 56 | static void initialize(); |
| duke@435 | 57 | static void invalidate_word(address addr); |
| duke@435 | 58 | static void invalidate_range(address start, int nbytes); |
| duke@435 | 59 | }; |
| duke@435 | 60 | |
| duke@435 | 61 | |
| duke@435 | 62 | // Must be included before the definition of ICacheStubGenerator |
| duke@435 | 63 | // because ICacheStubGenerator uses ICache definitions. |
| duke@435 | 64 | |
| duke@435 | 65 | #include "incls/_icache_pd.hpp.incl" |
| duke@435 | 66 | |
| duke@435 | 67 | |
| duke@435 | 68 | class ICacheStubGenerator : public StubCodeGenerator { |
| duke@435 | 69 | public: |
| duke@435 | 70 | ICacheStubGenerator(CodeBuffer *c) : StubCodeGenerator(c) {} |
| duke@435 | 71 | |
| duke@435 | 72 | // Generate the icache flush stub. |
| duke@435 | 73 | // |
| duke@435 | 74 | // Since we cannot flush the cache when this stub is generated, |
| duke@435 | 75 | // it must be generated first, and just to be sure, we do extra |
| duke@435 | 76 | // work to allow a check that these instructions got executed. |
| duke@435 | 77 | // |
| duke@435 | 78 | // The flush stub has three parameters (see flush_icache_stub_t). |
| duke@435 | 79 | // |
| duke@435 | 80 | // addr - Start address, must be aligned at log2_line_size |
| duke@435 | 81 | // lines - Number of line_size icache lines to flush |
| duke@435 | 82 | // magic - Magic number copied to result register to make sure |
| duke@435 | 83 | // the stub executed properly |
| duke@435 | 84 | // |
| duke@435 | 85 | // A template for generate_icache_flush is |
| duke@435 | 86 | // |
| duke@435 | 87 | // #define __ _masm-> |
| duke@435 | 88 | // |
| duke@435 | 89 | // void ICacheStubGenerator::generate_icache_flush( |
| duke@435 | 90 | // ICache::flush_icache_stub_t* flush_icache_stub |
| duke@435 | 91 | // ) { |
| duke@435 | 92 | // StubCodeMark mark(this, "ICache", "flush_icache_stub"); |
| duke@435 | 93 | // |
| duke@435 | 94 | // address start = __ pc(); |
| duke@435 | 95 | // |
| duke@435 | 96 | // // emit flush stub asm code |
| duke@435 | 97 | // |
| duke@435 | 98 | // // Must be set here so StubCodeMark destructor can call the flush stub. |
| duke@435 | 99 | // *flush_icache_stub = (ICache::flush_icache_stub_t)start; |
| duke@435 | 100 | // }; |
| duke@435 | 101 | // |
| duke@435 | 102 | // #undef __ |
| duke@435 | 103 | // |
| duke@435 | 104 | // The first use of flush_icache_stub must apply it to itself. The |
| duke@435 | 105 | // StubCodeMark destructor in generate_icache_flush will call Assembler::flush, |
| duke@435 | 106 | // which in turn will call invalidate_range (see asm/assembler.cpp), which |
| duke@435 | 107 | // in turn will call the flush stub *before* generate_icache_flush returns. |
| duke@435 | 108 | // The usual method of having generate_icache_flush return the address of the |
| duke@435 | 109 | // stub to its caller, which would then, e.g., store that address in |
| duke@435 | 110 | // flush_icache_stub, won't work. generate_icache_flush must itself set |
| duke@435 | 111 | // flush_icache_stub to the address of the stub it generates before |
| duke@435 | 112 | // the StubCodeMark destructor is invoked. |
| duke@435 | 113 | |
| duke@435 | 114 | void generate_icache_flush(ICache::flush_icache_stub_t* flush_icache_stub); |
| duke@435 | 115 | }; |
