pagetable.hh revision 3804 
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 "config/full_system.hh"
36
37namespace SparcISA
38{
39struct VAddr
40{
41    VAddr(Addr a) { panic("not implemented yet."); }
42};
43
44class PageTableEntry
45{
46  public:
47    enum EntryType {
48      sun4v,
49      sun4u,
50      invalid
51    };
52
53  private:
54    uint64_t entry;
55    EntryType type;
56    uint64_t entry4u;
57    bool populated;
58
59
60  public:
61    PageTableEntry() : entry(0), type(invalid), populated(false) {}
62
63    PageTableEntry(uint64_t e, EntryType t = sun4u)
64        : entry(e), type(t), populated(true)
65
66    {
67        populate(entry, type);
68    }
69
70    void populate(uint64_t e, EntryType t = sun4u)
71    {
72        entry = e;
73        type = t;
74        populated = true;
75
76        // If we get a sun4v format TTE, turn it into a sun4u
77        if (type == sun4u)
78            entry4u = entry;
79        else {
80            uint64_t entry4u = 0;
81            entry4u |= entry & ULL(0x8000000000000000);              //valid
82            entry4u |= (entry & 0x3) << 61;                     //size[1:0]
83            entry4u |= (entry & ULL(0x4000000000000000)) >> 2;       //nfo
84            entry4u |= (entry & 0x1000) << 47;                  //ie
85            //entry4u |= (entry & 0x3F00000000000000) >> 7;       //soft2
86            entry4u |= (entry & 0x4) << 48;                     //size[2]
87                                                                //diag?
88            entry4u |= (entry & ULL(0x0000FFFFFFFFE000));            //paddr
89            entry4u |= (entry & 0x400) >> 5;                    //cp
90            entry4u |= (entry & 0x200) >> 5;                    //cv
91            entry4u |= (entry & 0x800) >> 8;                    //e
92            entry4u |= (entry & 0x100) >> 6;                    //p
93            entry4u |= (entry & 0x40) >> 5;                     //w
94        }
95    }
96
97    void clear()
98    {
99        populated = false;
100    }
101
102    static int pageSizes[6];
103
104
105    uint64_t operator()() const { assert(populated); return entry4u; }
106    const PageTableEntry &operator=(uint64_t e) { populated = true;
107                                                  entry4u = e; return *this; }
108
109    const PageTableEntry &operator=(const PageTableEntry &e)
110    { populated = true; entry4u = e.entry4u; return *this; }
111
112    bool    valid()    const { return entry4u & ULL(0x8000000000000000) && populated; }
113    uint8_t _size()     const { assert(populated);
114                               return ((entry4u & 0x6) >> 61) |
115                                      ((entry4u & ULL(0x000080000000000)) >> 46); }
116    Addr    size()     const { return pageSizes[_size()]; }
117    bool    ie()       const { return entry4u >> 59 & 0x1; }
118    Addr    pfn()      const { assert(populated);
119                               return entry4u >> 13 & ULL(0xFFFFFFFFFF); }
120    Addr    paddr()    const { assert(populated);
121                               return entry4u & ULL(0x0000FFFFFFFFE000); }
122    bool    locked()   const { assert(populated);
123                               return entry4u & 0x40; }
124    bool    cv()       const { assert(populated);
125                               return entry4u & 0x10; }
126    bool    cp()       const { assert(populated);
127                               return entry4u & 0x20; }
128    bool    priv()     const { assert(populated);
129                               return entry4u & 0x4; }
130    bool    writable() const { assert(populated);
131                               return entry4u & 0x2; }
132    bool    nofault()  const { assert(populated);
133                               return entry4u & ULL(0x1000000000000000); }
134    bool    sideffect() const { assert(populated);
135                                return entry4u & 0x8; }
136};
137
138struct TlbRange {
139    Addr va;
140    Addr size;
141    int contextId;
142    int partitionId;
143    bool real;
144
145    inline bool operator<(const TlbRange &r2) const
146    {
147        if (real && !r2.real)
148            return true;
149        if (!real && r2.real)
150            return false;
151
152        if (!real && !r2.real) {
153            if (contextId < r2.contextId)
154                return true;
155            else if (contextId > r2.contextId)
156                return false;
157        }
158
159        if (partitionId < r2.partitionId)
160            return true;
161        else if (partitionId > r2.partitionId)
162            return false;
163
164        if (va < r2.va)
165            return true;
166        return false;
167    }
168    inline bool operator==(const TlbRange &r2) const
169    {
170        return va == r2.va &&
171               size == r2.size &&
172               contextId == r2.contextId &&
173               partitionId == r2.partitionId &&
174               real == r2.real;
175    }
176};
177
178
179struct TlbEntry {
180    TlbRange range;
181    PageTableEntry pte;
182    bool used;
183    bool valid;
184
185    void serialize(std::ostream &os);
186    void unserialize(Checkpoint *cp, const std::string &section);
187
188};
189
190
191}; // namespace SparcISA
192
193#endif // __ARCH_SPARC_PAGE_TABLE_HH__
194
195