vtophys.cc revision 8232:b28d06a175be 
1/*
2 * Copyright (c) 2007 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 <string>
41
42#include "arch/x86/pagetable_walker.hh"
43#include "arch/x86/tlb.hh"
44#include "arch/x86/vtophys.hh"
45#include "base/trace.hh"
46#include "config/full_system.hh"
47#include "cpu/thread_context.hh"
48#include "debug/VtoPhys.hh"
49#include "sim/fault_fwd.hh"
50
51using namespace std;
52
53namespace X86ISA
54{
55    Addr
56    vtophys(Addr vaddr)
57    {
58#if FULL_SYSTEM
59        panic("Need access to page tables\n");
60#endif
61        return vaddr;
62    }
63
64    Addr
65    vtophys(ThreadContext *tc, Addr vaddr)
66    {
67#if FULL_SYSTEM
68        Walker *walker = tc->getDTBPtr()->getWalker();
69        Addr size;
70        Addr addr = vaddr;
71        Fault fault = walker->startFunctional(tc, addr, size, BaseTLB::Read);
72        if (fault != NoFault)
73            panic("vtophys page walk returned fault\n");
74        Addr masked_addr = vaddr & (size - 1);
75        Addr paddr = addr | masked_addr;
76        DPRINTF(VtoPhys, "vtophys(%#x) -> %#x\n", vaddr, paddr);
77        return paddr;
78#endif
79        return vaddr;
80    }
81}
82