packet_access.hh revision 4040
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 * Nathan Binkert 30 */ 31 32#include "arch/isa_traits.hh" 33#include "base/bigint.hh" 34#include "mem/packet.hh" 35#include "sim/byteswap.hh" 36 37#ifndef __MEM_PACKET_ACCESS_HH__ 38#define __MEM_PACKET_ACCESS_HH__ 39// The memory system needs to have an endianness. This is the easiest 40// way to deal with it for now. At some point, we will have to remove 41// these functions and make the users do their own byte swapping since 42// the memory system does not in fact have an endianness. 43 44template<> 45inline Twin64_t 46Packet::get() 47{ 48 Twin64_t d; 49 assert(staticData || dynamicData); 50 assert(sizeof(Twin64_t) <= size); 51 d.a = TheISA::gtoh(*(uint64_t*)data); 52 d.b = TheISA::gtoh(*((uint64_t*)data + 1)); 53 return d; 54} 55 56 57/** return the value of what is pointed to in the packet. */ 58template <typename T> 59inline T 60Packet::get() 61{ 62 assert(staticData || dynamicData); 63 assert(sizeof(T) <= size); 64 return TheISA::gtoh(*(T*)data); 65} 66 67/** set the value in the data pointer to v. */ 68template <typename T> 69inline void 70Packet::set(T v) 71{ 72 assert(sizeof(T) <= size); 73 *(T*)data = TheISA::htog(v); 74} 75 76#endif //__MEM_PACKET_ACCESS_HH__ 77