packet_access.hh revision 4115:cc1d6df13c7d 
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
56template<>
57inline Twin32_t
58Packet::get()
59{
60    Twin32_t d;
61    assert(staticData || dynamicData);
62    assert(sizeof(Twin32_t) <= size);
63    d.a = TheISA::gtoh(*(uint32_t*)data);
64    d.b = TheISA::gtoh(*((uint32_t*)data + 1));
65    return d;
66}
67
68
69/** return the value of what is pointed to in the packet. */
70template <typename T>
71inline T
72Packet::get()
73{
74    assert(staticData || dynamicData);
75    assert(sizeof(T) <= size);
76    return TheISA::gtoh(*(T*)data);
77}
78
79/** set the value in the data pointer to v. */
80template <typename T>
81inline void
82Packet::set(T v)
83{
84    assert(sizeof(T) <= size);
85    *(T*)data = TheISA::htog(v);
86}
87
88#endif //__MEM_PACKET_ACCESS_HH__
89