pagetable.hh revision 3809:41f230650d69 
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/misc.hh"
36#include "config/full_system.hh"
37
38class Checkpoint;
39
40namespace SparcISA
41{
42struct VAddr
43{
44    VAddr(Addr a) { panic("not implemented yet."); }
45};
46
47class PageTableEntry
48{
49  public:
50    enum EntryType {
51      sun4v,
52      sun4u,
53      invalid
54    };
55
56  private:
57    uint64_t entry;
58    EntryType type;
59    uint64_t entry4u;
60    bool populated;
61
62
63  public:
64    PageTableEntry() : entry(0), type(invalid), populated(false) {}
65
66    PageTableEntry(uint64_t e, EntryType t = sun4u)
67        : entry(e), type(t), populated(true)
68
69    {
70        populate(entry, type);
71    }
72
73    void populate(uint64_t e, EntryType t = sun4u)
74    {
75        entry = e;
76        type = t;
77        populated = true;
78
79        // If we get a sun4v format TTE, turn it into a sun4u
80        if (type == sun4u)
81            entry4u = entry;
82        else {
83            uint64_t entry4u = 0;
84            entry4u |= entry & ULL(0x8000000000000000);              //valid
85            entry4u |= (entry & 0x3) << 61;                     //size[1:0]
86            entry4u |= (entry & ULL(0x4000000000000000)) >> 2;       //nfo
87            entry4u |= (entry & 0x1000) << 47;                  //ie
88            //entry4u |= (entry & 0x3F00000000000000) >> 7;       //soft2
89            entry4u |= (entry & 0x4) << 48;                     //size[2]
90                                                                //diag?
91            entry4u |= (entry & ULL(0x0000FFFFFFFFE000));            //paddr
92            entry4u |= (entry & 0x400) >> 5;                    //cp
93            entry4u |= (entry & 0x200) >> 5;                    //cv
94            entry4u |= (entry & 0x800) >> 8;                    //e
95            entry4u |= (entry & 0x100) >> 6;                    //p
96            entry4u |= (entry & 0x40) >> 5;                     //w
97        }
98    }
99
100    void clear()
101    {
102        populated = false;
103    }
104
105    static int pageSizes[6];
106
107
108    uint64_t operator()() const { assert(populated); return entry4u; }
109    const PageTableEntry &operator=(uint64_t e) { populated = true;
110                                                  entry4u = e; return *this; }
111
112    const PageTableEntry &operator=(const PageTableEntry &e)
113    { populated = true; entry4u = e.entry4u; return *this; }
114
115    bool    valid()    const { return entry4u & ULL(0x8000000000000000) && populated; }
116    uint8_t _size()     const { assert(populated);
117                               return ((entry4u & 0x6) >> 61) |
118                                      ((entry4u & ULL(0x000080000000000)) >> 46); }
119    Addr    size()     const { return pageSizes[_size()]; }
120    bool    ie()       const { return entry4u >> 59 & 0x1; }
121    Addr    pfn()      const { assert(populated);
122                               return entry4u >> 13 & ULL(0xFFFFFFFFFF); }
123    Addr    paddr()    const { assert(populated);
124                               return entry4u & ULL(0x0000FFFFFFFFE000); }
125    bool    locked()   const { assert(populated);
126                               return entry4u & 0x40; }
127    bool    cv()       const { assert(populated);
128                               return entry4u & 0x10; }
129    bool    cp()       const { assert(populated);
130                               return entry4u & 0x20; }
131    bool    priv()     const { assert(populated);
132                               return entry4u & 0x4; }
133    bool    writable() const { assert(populated);
134                               return entry4u & 0x2; }
135    bool    nofault()  const { assert(populated);
136                               return entry4u & ULL(0x1000000000000000); }
137    bool    sideffect() const { assert(populated);
138                                return entry4u & 0x8; }
139};
140
141struct TlbRange {
142    Addr va;
143    Addr size;
144    int contextId;
145    int partitionId;
146    bool real;
147
148    inline bool operator<(const TlbRange &r2) const
149    {
150        if (real && !r2.real)
151            return true;
152        if (!real && r2.real)
153            return false;
154
155        if (!real && !r2.real) {
156            if (contextId < r2.contextId)
157                return true;
158            else if (contextId > r2.contextId)
159                return false;
160        }
161
162        if (partitionId < r2.partitionId)
163            return true;
164        else if (partitionId > r2.partitionId)
165            return false;
166
167        if (va < r2.va)
168            return true;
169        return false;
170    }
171    inline bool operator==(const TlbRange &r2) const
172    {
173        return va == r2.va &&
174               size == r2.size &&
175               contextId == r2.contextId &&
176               partitionId == r2.partitionId &&
177               real == r2.real;
178    }
179};
180
181
182struct TlbEntry {
183    TlbRange range;
184    PageTableEntry pte;
185    bool used;
186    bool valid;
187
188    void serialize(std::ostream &os);
189    void unserialize(Checkpoint *cp, const std::string &section);
190
191};
192
193
194}; // namespace SparcISA
195
196#endif // __ARCH_SPARC_PAGE_TABLE_HH__
197
198