pagetable.hh revision 5013:d789d5458d81 
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#ifndef __ARCH_SPARC_PAGETABLE_HH__
32#define __ARCH_SPARC_PAGETABLE_HH__
33
34#include "arch/sparc/isa_traits.hh"
35#include "base/bitfield.hh"
36#include "base/misc.hh"
37#include "config/full_system.hh"
38
39class Checkpoint;
40
41namespace SparcISA
42{
43struct VAddr
44{
45    VAddr(Addr a) { panic("not implemented yet."); }
46};
47
48class TteTag
49{
50  private:
51    uint64_t entry;
52    bool populated;
53
54  public:
55    TteTag() : entry(0), populated(false) {}
56    TteTag(uint64_t e) : entry(e), populated(true) {}
57    const TteTag &operator=(uint64_t e) { populated = true;
58                                          entry = e; return *this; }
59    bool valid() const {assert(populated); return !bits(entry,62,62); }
60    Addr va()    const {assert(populated); return bits(entry,41,0); }
61};
62
63
64class PageTableEntry
65{
66  public:
67    enum EntryType {
68      sun4v,
69      sun4u,
70      invalid
71    };
72
73  private:
74    uint64_t entry;
75    EntryType type;
76    uint64_t entry4u;
77    bool populated;
78
79
80  public:
81    PageTableEntry() : entry(0), type(invalid), populated(false) {}
82
83    PageTableEntry(uint64_t e, EntryType t = sun4u)
84        : entry(e), type(t), populated(true)
85
86    {
87        populate(entry, type);
88    }
89
90    void populate(uint64_t e, EntryType t = sun4u)
91    {
92        entry = e;
93        type = t;
94        populated = true;
95
96        // If we get a sun4v format TTE, turn it into a sun4u
97        if (type == sun4u)
98            entry4u = entry;
99        else {
100            entry4u = 0;
101            entry4u |= mbits(entry,63,63);         //valid
102            entry4u |= bits(entry,1,0) << 61;      //size[1:0]
103            entry4u |= bits(entry,62,62) << 60;    //nfo
104            entry4u |= bits(entry,12,12) << 59;    //ie
105            entry4u |= bits(entry,2,2) << 48;      //size[2]
106            entry4u |= mbits(entry,39,13);         //paddr
107            entry4u |= bits(entry,61,61) << 6;;    // locked
108            entry4u |= bits(entry,10,10) << 5;     //cp
109            entry4u |= bits(entry,9,9) << 4;       //cv
110            entry4u |= bits(entry,11,11) << 3;     //e
111            entry4u |= bits(entry,8,8) << 2;       //p
112            entry4u |= bits(entry,6,6) << 1;       //w
113        }
114    }
115
116    void clear()
117    {
118        populated = false;
119    }
120
121    static int pageSizes[6];
122
123
124    uint64_t operator()() const { assert(populated); return entry4u; }
125    const PageTableEntry &operator=(uint64_t e) { populated = true;
126                                                  entry4u = e; return *this; }
127
128    const PageTableEntry &operator=(const PageTableEntry &e)
129    { populated = true; entry4u = e.entry4u; type = e.type; return *this; }
130
131    bool    valid()    const { return bits(entry4u,63,63) && populated; }
132    uint8_t _size()     const { assert(populated);
133                               return bits(entry4u, 62,61) |
134                                      bits(entry4u, 48,48) << 2; }
135    Addr    size()     const { assert(_size() < 6); return pageSizes[_size()]; }
136    Addr    sizeMask() const { assert(_size() < 6); return pageSizes[_size()]-1;}
137    bool    ie()       const { return bits(entry4u, 59,59); }
138    Addr    pfn()      const { assert(populated); return bits(entry4u,39,13); }
139    Addr    paddr()    const { assert(populated); return mbits(entry4u, 39,13);}
140    bool    locked()   const { assert(populated); return bits(entry4u,6,6); }
141    bool    cv()       const { assert(populated); return bits(entry4u,4,4); }
142    bool    cp()       const { assert(populated); return bits(entry4u,5,5); }
143    bool    priv()     const { assert(populated); return bits(entry4u,2,2); }
144    bool    writable() const { assert(populated); return bits(entry4u,1,1); }
145    bool    nofault()  const { assert(populated); return bits(entry4u,60,60); }
146    bool    sideffect() const { assert(populated); return bits(entry4u,3,3); }
147    Addr    paddrMask() const { assert(populated);
148                                return mbits(entry4u, 39,13) & ~sizeMask(); }
149};
150
151struct TlbRange {
152    Addr va;
153    Addr size;
154    int contextId;
155    int partitionId;
156    bool real;
157
158    inline bool operator<(const TlbRange &r2) const
159    {
160        if (real && !r2.real)
161            return true;
162        if (!real && r2.real)
163            return false;
164
165        if (!real && !r2.real) {
166            if (contextId < r2.contextId)
167                return true;
168            else if (contextId > r2.contextId)
169                return false;
170        }
171
172        if (partitionId < r2.partitionId)
173            return true;
174        else if (partitionId > r2.partitionId)
175            return false;
176
177        if (va < r2.va)
178            return true;
179        return false;
180    }
181    inline bool operator==(const TlbRange &r2) const
182    {
183        return va == r2.va &&
184               size == r2.size &&
185               contextId == r2.contextId &&
186               partitionId == r2.partitionId &&
187               real == r2.real;
188    }
189};
190
191
192struct TlbEntry {
193    Addr pageStart;
194    TlbEntry()
195    {}
196    TlbEntry(Addr addr) : pageStart(addr)
197    {}
198    TlbRange range;
199    PageTableEntry pte;
200    bool used;
201    bool valid;
202
203    void serialize(std::ostream &os);
204    void unserialize(Checkpoint *cp, const std::string &section);
205
206};
207
208
209}; // namespace SparcISA
210
211#endif // __ARCH_SPARC_PAGE_TABLE_HH__
212
213