1/*
2 * Copyright (c) 2001-2005 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: Nathan Binkert
29 * Steve Reinhardt
30 */
31
32#ifndef __ARCH_ALPHA_TLB_HH__
33#define __ARCH_ALPHA_TLB_HH__
34
35#include <map>
36
37#include "arch/alpha/ev5.hh"
38#include "arch/alpha/isa_traits.hh"
39#include "arch/alpha/pagetable.hh"
40#include "arch/alpha/utility.hh"
41#include "arch/alpha/vtophys.hh"
42#include "base/statistics.hh"
43#include "mem/request.hh"
44#include "params/AlphaDTB.hh"
45#include "params/AlphaITB.hh"
46#include "sim/faults.hh"
47#include "sim/tlb.hh"
48
49class ThreadContext;
50
51namespace AlphaISA {
52
53class TlbEntry;
54
55class TLB : public BaseTLB
56{
57 protected:
58 typedef std::multimap<Addr, int> PageTable;
59 PageTable lookupTable; // Quick lookup into page table
60
61 TlbEntry *table; // the Page Table
62 int size; // TLB Size
63 int nlu; // not last used entry (for replacement)
64
65 void nextnlu() { if (++nlu >= size) nlu = 0; }
66 TlbEntry *lookup(Addr vpn, uint8_t asn);
67
68 public:
69 typedef AlphaTLBParams Params;
70 TLB(const Params *p);
71 virtual ~TLB();
72
73 int getsize() const { return size; }
74
75 TlbEntry &index(bool advance = true);
76 void insert(Addr vaddr, TlbEntry &entry);
77
78 void flushAll();
79 void flushProcesses();
80 void flushAddr(Addr addr, uint8_t asn);
81
82 void
83 demapPage(Addr vaddr, uint64_t asn)
84 {
85 assert(asn < (1 << 8));
86 flushAddr(vaddr, asn);
87 }
88
89 // static helper functions... really EV5 VM traits
90 static bool
91 validVirtualAddress(Addr vaddr)
92 {
93 // unimplemented bits must be all 0 or all 1
94 Addr unimplBits = vaddr & VAddrUnImplMask;
95 return unimplBits == 0 || unimplBits == VAddrUnImplMask;
96 }
97
98 static Fault checkCacheability(RequestPtr &req, bool itb = false);
99
100 // Checkpointing
101 virtual void serialize(std::ostream &os);
102 virtual void unserialize(Checkpoint *cp, const std::string §ion);
103
104 // Most recently used page table entries
105 TlbEntry *EntryCache[3];
106 inline void
107 flushCache()
108 {
109 memset(EntryCache, 0, 3 * sizeof(TlbEntry*));
110 }
111
112 inline TlbEntry *
113 updateCache(TlbEntry *entry) {
114 EntryCache[2] = EntryCache[1];
115 EntryCache[1] = EntryCache[0];
116 EntryCache[0] = entry;
117 return entry;
118 }
119};
120
121class ITB : public TLB
122{
123 protected:
124 mutable Stats::Scalar<> hits;
125 mutable Stats::Scalar<> misses;
126 mutable Stats::Scalar<> acv;
127 mutable Stats::Formula accesses;
128
129 public:
130 typedef AlphaITBParams Params;
131 ITB(const Params *p);
132 virtual void regStats();
133
| 1/*
2 * Copyright (c) 2001-2005 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: Nathan Binkert
29 * Steve Reinhardt
30 */
31
32#ifndef __ARCH_ALPHA_TLB_HH__
33#define __ARCH_ALPHA_TLB_HH__
34
35#include <map>
36
37#include "arch/alpha/ev5.hh"
38#include "arch/alpha/isa_traits.hh"
39#include "arch/alpha/pagetable.hh"
40#include "arch/alpha/utility.hh"
41#include "arch/alpha/vtophys.hh"
42#include "base/statistics.hh"
43#include "mem/request.hh"
44#include "params/AlphaDTB.hh"
45#include "params/AlphaITB.hh"
46#include "sim/faults.hh"
47#include "sim/tlb.hh"
48
49class ThreadContext;
50
51namespace AlphaISA {
52
53class TlbEntry;
54
55class TLB : public BaseTLB
56{
57 protected:
58 typedef std::multimap<Addr, int> PageTable;
59 PageTable lookupTable; // Quick lookup into page table
60
61 TlbEntry *table; // the Page Table
62 int size; // TLB Size
63 int nlu; // not last used entry (for replacement)
64
65 void nextnlu() { if (++nlu >= size) nlu = 0; }
66 TlbEntry *lookup(Addr vpn, uint8_t asn);
67
68 public:
69 typedef AlphaTLBParams Params;
70 TLB(const Params *p);
71 virtual ~TLB();
72
73 int getsize() const { return size; }
74
75 TlbEntry &index(bool advance = true);
76 void insert(Addr vaddr, TlbEntry &entry);
77
78 void flushAll();
79 void flushProcesses();
80 void flushAddr(Addr addr, uint8_t asn);
81
82 void
83 demapPage(Addr vaddr, uint64_t asn)
84 {
85 assert(asn < (1 << 8));
86 flushAddr(vaddr, asn);
87 }
88
89 // static helper functions... really EV5 VM traits
90 static bool
91 validVirtualAddress(Addr vaddr)
92 {
93 // unimplemented bits must be all 0 or all 1
94 Addr unimplBits = vaddr & VAddrUnImplMask;
95 return unimplBits == 0 || unimplBits == VAddrUnImplMask;
96 }
97
98 static Fault checkCacheability(RequestPtr &req, bool itb = false);
99
100 // Checkpointing
101 virtual void serialize(std::ostream &os);
102 virtual void unserialize(Checkpoint *cp, const std::string §ion);
103
104 // Most recently used page table entries
105 TlbEntry *EntryCache[3];
106 inline void
107 flushCache()
108 {
109 memset(EntryCache, 0, 3 * sizeof(TlbEntry*));
110 }
111
112 inline TlbEntry *
113 updateCache(TlbEntry *entry) {
114 EntryCache[2] = EntryCache[1];
115 EntryCache[1] = EntryCache[0];
116 EntryCache[0] = entry;
117 return entry;
118 }
119};
120
121class ITB : public TLB
122{
123 protected:
124 mutable Stats::Scalar<> hits;
125 mutable Stats::Scalar<> misses;
126 mutable Stats::Scalar<> acv;
127 mutable Stats::Formula accesses;
128
129 public:
130 typedef AlphaITBParams Params;
131 ITB(const Params *p);
132 virtual void regStats();
133
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