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Diffstat (limited to 'mem/translating_port.cc')
| -rw-r--r-- | mem/translating_port.cc | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/mem/translating_port.cc b/mem/translating_port.cc new file mode 100644 index 000000000..5dfeaff31 --- /dev/null +++ b/mem/translating_port.cc @@ -0,0 +1,186 @@ +/* + * Copyright (c) 2001-2005 The Regents of The University of Michigan + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include <string> +#include "base/chunk_generator.hh" +#include "mem/port.hh" +#include "mem/translating_port.hh" +#include "mem/page_table.hh" + +using namespace TheISA; + +TranslatingPort::TranslatingPort(PageTable *p_table, bool alloc) + : pTable(p_table), allocating(alloc) +{ } + +TranslatingPort::~TranslatingPort() +{ } + +bool +TranslatingPort::tryReadBlob(Addr addr, uint8_t *p, int size) +{ + Addr paddr; + int prevSize = 0; + + for (ChunkGenerator gen(addr, size, VMPageSize); !gen.done(); gen.next()) { + + if (!pTable->translate(gen.addr(),paddr)) + return false; + + Port::readBlob(paddr, p + prevSize, gen.size()); + prevSize += gen.size(); + } + + return true; +} + +void +TranslatingPort::readBlob(Addr addr, uint8_t *p, int size) +{ + if (!tryReadBlob(addr, p, size)) + fatal("readBlob(0x%x, ...) failed", addr); +} + + +bool +TranslatingPort::tryWriteBlob(Addr addr, uint8_t *p, int size) +{ + + Addr paddr; + int prevSize = 0; + + for (ChunkGenerator gen(addr, size, VMPageSize); !gen.done(); gen.next()) { + + if (!pTable->translate(gen.addr(), paddr)) { + if (allocating) { + pTable->allocate(roundDown(gen.addr(), VMPageSize), + VMPageSize); + pTable->translate(gen.addr(), paddr); + } else { + return false; + } + } + + Port::writeBlob(paddr, p + prevSize, gen.size()); + prevSize += gen.size(); + } + + return true; +} + + +void +TranslatingPort::writeBlob(Addr addr, uint8_t *p, int size) +{ + if (!tryWriteBlob(addr, p, size)) + fatal("writeBlob(0x%x, ...) failed", addr); +} + +bool +TranslatingPort::tryMemsetBlob(Addr addr, uint8_t val, int size) +{ + Addr paddr; + + for (ChunkGenerator gen(addr, size, VMPageSize); !gen.done(); gen.next()) { + + if (!pTable->translate(gen.addr(), paddr)) { + if (allocating) { + pTable->allocate(roundDown(gen.addr(), VMPageSize), + VMPageSize); + pTable->translate(gen.addr(), paddr); + } else { + return false; + } + } + + Port::memsetBlob(paddr, val, gen.size()); + } + + return true; +} + +void +TranslatingPort::memsetBlob(Addr addr, uint8_t val, int size) +{ + if (!tryMemsetBlob(addr, val, size)) + fatal("memsetBlob(0x%x, ...) failed", addr); +} + + +bool +TranslatingPort::tryWriteString(Addr addr, const char *str) +{ + Addr paddr,vaddr; + uint8_t c; + + vaddr = addr; + + do { + c = *str++; + if (!pTable->translate(vaddr++,paddr)) + return false; + + Port::writeBlob(paddr, &c, 1); + } while (c); + + return true; +} + +void +TranslatingPort::writeString(Addr addr, const char *str) +{ + if (!tryWriteString(addr, str)) + fatal("writeString(0x%x, ...) failed", addr); +} + +bool +TranslatingPort::tryReadString(std::string &str, Addr addr) +{ + Addr paddr,vaddr; + uint8_t c; + + vaddr = addr; + + do { + if (!pTable->translate(vaddr++,paddr)) + return false; + + Port::readBlob(paddr, &c, 1); + str += c; + } while (c); + + return true; +} + +void +TranslatingPort::readString(std::string &str, Addr addr) +{ + if (!tryReadString(str, addr)) + fatal("readString(0x%x, ...) failed", addr); +} + |