fs_translating_port_proxy.hh revision 8229
1/* 2 * Copyright (c) 2006 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Ali Saidi 29 */ 30 31/** 32 * @file 33 * Virtual Port Object Declaration. These ports incorporate some translation 34 * into their access methods. Thus you can use one to read and write data 35 * to/from virtual addresses. 36 */ 37 38#ifndef __MEM_VPORT_HH__ 39#define __MEM_VPORT_HH__ 40 41#include "arch/vtophys.hh" 42#include "config/full_system.hh" 43#include "mem/port_impl.hh" 44 45/** A class that translates a virtual address to a physical address and then 46 * calls the above read/write functions. If a thread context is provided the 47 * address can alway be translated, If not it can only be translated if it is a 48 * simple address masking operation (such as alpha super page accesses). 49 */ 50 51 52class VirtualPort : public FunctionalPort 53{ 54 private: 55 ThreadContext *tc; 56 57 public: 58 VirtualPort(const std::string &_name, ThreadContext *_tc = NULL) 59 : FunctionalPort(_name), tc(_tc) 60 {} 61 62 /** Return true if we have an thread context. This is used to 63 * prevent someone from accidently deleting the cpus statically 64 * allocated vport. 65 * @return true if a thread context isn't valid 66 */ 67 bool nullThreadContext() { return tc != NULL; } 68 69 /** Version of readblob that translates virt->phys and deals 70 * with page boundries. */ 71 virtual void readBlob(Addr addr, uint8_t *p, int size); 72 73 /** Version of writeBlob that translates virt->phys and deals 74 * with page boundries. */ 75 virtual void writeBlob(Addr addr, uint8_t *p, int size); 76}; 77 78 79void CopyOut(ThreadContext *tc, void *dest, Addr src, size_t cplen); 80void CopyIn(ThreadContext *tc, Addr dest, void *source, size_t cplen); 81void CopyStringOut(ThreadContext *tc, char *dst, Addr vaddr, size_t maxlen); 82void CopyStringIn(ThreadContext *tc, char *src, Addr vaddr); 83 84#endif //__MEM_VPORT_HH__ 85 86