e820.cc revision 7087 
1/*
2 * Copyright (c) 2008 The Hewlett-Packard Development Company
3 * All rights reserved.
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder.  You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions are
16 * met: redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer;
18 * redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution;
21 * neither the name of the copyright holders nor the names of its
22 * contributors may be used to endorse or promote products derived from
23 * this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * Authors: Gabe Black
38 */
39
40#include "arch/x86/bios/e820.hh"
41#include "arch/x86/isa_traits.hh"
42#include "mem/port.hh"
43#include "sim/byteswap.hh"
44
45using namespace std;
46using namespace X86ISA;
47
48template<class T>
49void writeVal(T val, Port * port, Addr &addr)
50{
51    T guestVal = htog(val);
52    port->writeBlob(addr, (uint8_t *)&guestVal, sizeof(T));
53    addr += sizeof(T);
54}
55
56void X86ISA::E820Table::writeTo(Port * port, Addr countAddr, Addr addr)
57{
58    uint8_t e820Nr = entries.size();
59
60    // Make sure the number of entries isn't bigger than what the kernel
61    // would be capable of handling.
62    assert(e820Nr <= 128);
63
64    uint8_t guestE820Nr = htog(e820Nr);
65
66    port->writeBlob(countAddr, (uint8_t *)&guestE820Nr, sizeof(guestE820Nr));
67
68    for (int i = 0; i < e820Nr; i++) {
69        writeVal(entries[i]->addr, port, addr);
70        writeVal(entries[i]->size, port, addr);
71        writeVal(entries[i]->type, port, addr);
72    }
73}
74
75E820Table *
76X86E820TableParams::create()
77{
78    return new E820Table(this);
79}
80
81E820Entry *
82X86E820EntryParams::create()
83{
84    return new E820Entry(this);
85}
86