pagetable.hh revision 5555:07c10d7dd62d 
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
58    const TteTag &
59    operator=(uint64_t e)
60    {
61        populated = true;
62        entry = e;
63        return *this;
64    }
65
66    bool valid() const {assert(populated); return !bits(entry,62,62); }
67    Addr va()    const {assert(populated); return bits(entry,41,0); }
68};
69
70
71class PageTableEntry
72{
73  public:
74    enum EntryType {
75      sun4v,
76      sun4u,
77      invalid
78    };
79
80  private:
81    uint64_t entry;
82    EntryType type;
83    uint64_t entry4u;
84    bool populated;
85
86  public:
87    PageTableEntry()
88        : entry(0), type(invalid), populated(false)
89    {}
90
91    PageTableEntry(uint64_t e, EntryType t = sun4u)
92        : entry(e), type(t), populated(true)
93    {
94        populate(entry, type);
95    }
96
97    void populate(uint64_t e, EntryType t = sun4u)
98    {
99        entry = e;
100        type = t;
101        populated = true;
102
103        // If we get a sun4v format TTE, turn it into a sun4u
104        if (type == sun4u)
105            entry4u = entry;
106        else {
107            entry4u = 0;
108            entry4u |= mbits(entry,63,63);         //valid
109            entry4u |= bits(entry,1,0) << 61;      //size[1:0]
110            entry4u |= bits(entry,62,62) << 60;    //nfo
111            entry4u |= bits(entry,12,12) << 59;    //ie
112            entry4u |= bits(entry,2,2) << 48;      //size[2]
113            entry4u |= mbits(entry,39,13);         //paddr
114            entry4u |= bits(entry,61,61) << 6;;    // locked
115            entry4u |= bits(entry,10,10) << 5;     //cp
116            entry4u |= bits(entry,9,9) << 4;       //cv
117            entry4u |= bits(entry,11,11) << 3;     //e
118            entry4u |= bits(entry,8,8) << 2;       //p
119            entry4u |= bits(entry,6,6) << 1;       //w
120        }
121    }
122
123    void
124    clear()
125    {
126        populated = false;
127    }
128
129    static int pageSizes[6];
130
131    uint64_t operator()() const { assert(populated); return entry4u; }
132    const PageTableEntry &
133    operator=(uint64_t e)
134    {
135        populated = true;
136        entry4u = e;
137        return *this;
138    }
139
140    const PageTableEntry &
141    operator=(const PageTableEntry &e)
142    {
143        populated = true;
144        entry4u = e.entry4u;
145        type = e.type;
146        return *this;
147    }
148
149    bool valid() const { return bits(entry4u,63,63) && populated; }
150
151    uint8_t
152    _size() const
153    {
154        assert(populated);
155        return bits(entry4u, 62,61) | bits(entry4u, 48,48) << 2;
156    }
157
158    Addr size()     const { assert(_size() < 6); return pageSizes[_size()]; }
159    Addr sizeMask() const { return size() - 1; }
160    bool ie()       const { return bits(entry4u, 59,59); }
161    Addr pfn()      const { assert(populated); return bits(entry4u,39,13); }
162    Addr paddr()    const { assert(populated); return mbits(entry4u, 39,13);}
163    bool locked()   const { assert(populated); return bits(entry4u,6,6); }
164    bool cv()       const { assert(populated); return bits(entry4u,4,4); }
165    bool cp()       const { assert(populated); return bits(entry4u,5,5); }
166    bool priv()     const { assert(populated); return bits(entry4u,2,2); }
167    bool writable() const { assert(populated); return bits(entry4u,1,1); }
168    bool nofault()  const { assert(populated); return bits(entry4u,60,60); }
169    bool sideffect() const { assert(populated); return bits(entry4u,3,3); }
170    Addr paddrMask() const { assert(populated); return paddr() & ~sizeMask(); }
171
172    Addr
173    translate(Addr vaddr) const
174    {
175        assert(populated);
176        Addr mask = sizeMask();
177        return (paddr() & ~mask) | (vaddr & mask);
178    }
179};
180
181struct TlbRange
182{
183    Addr va;
184    Addr size;
185    int contextId;
186    int partitionId;
187    bool real;
188
189    inline bool
190    operator<(const TlbRange &r2) const
191    {
192        if (real && !r2.real)
193            return true;
194        if (!real && r2.real)
195            return false;
196
197        if (!real && !r2.real) {
198            if (contextId < r2.contextId)
199                return true;
200            else if (contextId > r2.contextId)
201                return false;
202        }
203
204        if (partitionId < r2.partitionId)
205            return true;
206        else if (partitionId > r2.partitionId)
207            return false;
208
209        if (va < r2.va)
210            return true;
211        return false;
212    }
213
214    inline bool
215    operator==(const TlbRange &r2) const
216    {
217        return va == r2.va &&
218               size == r2.size &&
219               contextId == r2.contextId &&
220               partitionId == r2.partitionId &&
221               real == r2.real;
222    }
223};
224
225
226struct TlbEntry
227{
228    TlbEntry()
229    {}
230
231    TlbEntry(Addr asn, Addr vaddr, Addr paddr)
232    {
233        uint64_t entry = 0;
234        entry |= 1ULL << 1; // Writable
235        entry |= 0ULL << 2; // Available in nonpriveleged mode
236        entry |= 0ULL << 3; // No side effects
237        entry |= 1ULL << 4; // Virtually cachable
238        entry |= 1ULL << 5; // Physically cachable
239        entry |= 0ULL << 6; // Not locked
240        entry |= mbits(paddr, 39, 13); // Physical address
241        entry |= 0ULL << 48; // size = 8k
242        entry |= 0uLL << 59; // Endianness not inverted
243        entry |= 0ULL << 60; // Not no fault only
244        entry |= 0ULL << 61; // size = 8k
245        entry |= 1ULL << 63; // valid
246        pte = PageTableEntry(entry);
247
248        range.va = vaddr;
249        range.size = 8*(1<<10);
250        range.contextId = asn;
251        range.partitionId = 0;
252        range.real = false;
253
254        valid = true;
255    }
256
257    TlbRange range;
258    PageTableEntry pte;
259    bool used;
260    bool valid;
261
262    Addr pageStart()
263    {
264        return pte.paddr();
265    }
266
267    void serialize(std::ostream &os);
268    void unserialize(Checkpoint *cp, const std::string &section);
269};
270
271} // namespace SparcISA
272
273#endif // __ARCH_SPARC_PAGE_TABLE_HH__
274
275