1/*
2 * Copyright (c) 2010 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder. You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Copyright (c) 2001-2005 The Regents of The University of Michigan
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution;
24 * neither the name of the copyright holders nor the names of its
25 * contributors may be used to endorse or promote products derived from
26 * this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Authors: Ali Saidi
41 */
42
43#ifndef __ARCH_ARM_TLB_HH__
44#define __ARCH_ARM_TLB_HH__
45
46#include <map>
47
48#include "arch/arm/isa_traits.hh"
49#include "arch/arm/utility.hh"
50#include "arch/arm/vtophys.hh"
51#include "arch/arm/pagetable.hh"
52#include "base/statistics.hh"
53#include "mem/request.hh"
54#include "params/ArmTLB.hh"
55#include "sim/fault.hh"
56#include "sim/tlb.hh"
57
58class ThreadContext;
59
60namespace ArmISA {
61
62class TableWalker;
63
64class TLB : public BaseTLB
65{
66 public:
67 enum ArmFlags {
68 AlignmentMask = 0x1f,
69
70 AlignByte = 0x0,
71 AlignHalfWord = 0x1,
72 AlignWord = 0x3,
73 AlignDoubleWord = 0x7,
74 AlignQuadWord = 0xf,
75 AlignOctWord = 0x1f,
76
77 AllowUnaligned = 0x20,
78 // Priv code operating as if it wasn't
79 UserMode = 0x40,
80 // Because zero otherwise looks like a valid setting and may be used
81 // accidentally, this bit must be non-zero to show it was used on
82 // purpose.
83 MustBeOne = 0x80
84 };
85 protected:
86
87 TlbEntry *table; // the Page Table
88 int size; // TLB Size
89
90 uint32_t _attr; // Memory attributes for last accessed TLB entry
91
92#if FULL_SYSTEM
93 TableWalker *tableWalker;
94#endif
95
96 /** Lookup an entry in the TLB
97 * @param vpn virtual address
98 * @param asn context id/address space id to use
99 * @param functional if the lookup should modify state
100 * @return pointer to TLB entrry if it exists
101 */
102 TlbEntry *lookup(Addr vpn, uint8_t asn, bool functional = false);
103
104 // Access Stats
105 mutable Stats::Scalar instHits;
106 mutable Stats::Scalar instMisses;
107 mutable Stats::Scalar readHits;
108 mutable Stats::Scalar readMisses;
109 mutable Stats::Scalar writeHits;
110 mutable Stats::Scalar writeMisses;
111 mutable Stats::Scalar inserts;
112 mutable Stats::Scalar flushTlb;
113 mutable Stats::Scalar flushTlbMva;
114 mutable Stats::Scalar flushTlbMvaAsid;
115 mutable Stats::Scalar flushTlbAsid;
116 mutable Stats::Scalar flushedEntries;
117 mutable Stats::Scalar alignFaults;
118 mutable Stats::Scalar prefetchFaults;
119 mutable Stats::Scalar domainFaults;
120 mutable Stats::Scalar permsFaults;
121
122 Stats::Formula readAccesses;
123 Stats::Formula writeAccesses;
124 Stats::Formula instAccesses;
125 Stats::Formula hits;
126 Stats::Formula misses;
127 Stats::Formula accesses;
128
129 int rangeMRU; //On lookup, only move entries ahead when outside rangeMRU
130
131 public:
132 typedef ArmTLBParams Params;
133 TLB(const Params *p);
134
135 virtual ~TLB();
136 int getsize() const { return size; }
137
138 void insert(Addr vaddr, TlbEntry &pte);
139
140 /** Reset the entire TLB */
141 void flushAll();
142
143 /** Remove any entries that match both a va and asn
144 * @param mva virtual address to flush
145 * @param asn contextid/asn to flush on match
146 */
147 void flushMvaAsid(Addr mva, uint64_t asn);
148
149 /** Remove any entries that match the asn
150 * @param asn contextid/asn to flush on match
151 */
152 void flushAsid(uint64_t asn);
153
154 /** Remove all entries that match the va regardless of asn
155 * @param mva address to flush from cache
156 */
157 void flushMva(Addr mva);
158
159 Fault trickBoxCheck(RequestPtr req, Mode mode, uint8_t domain, bool sNp);
160 Fault walkTrickBoxCheck(Addr pa, Addr va, Addr sz, bool is_exec,
161 bool is_write, uint8_t domain, bool sNp);
162
163 void printTlb();
164
165 void demapPage(Addr vaddr, uint64_t asn)
166 {
167 flushMvaAsid(vaddr, asn);
168 }
169
170 static bool validVirtualAddress(Addr vaddr);
171
172 /**
173 * Do a functional lookup on the TLB (for debugging)
174 * and don't modify any internal state
175 * @param tc thread context to get the context id from
176 * @param vaddr virtual address to translate
177 * @param pa returned physical address
178 * @return if the translation was successful
179 */
180 bool translateFunctional(ThreadContext *tc, Addr vaddr, Addr &paddr);
181
182 /** Accessor functions for memory attributes for last accessed TLB entry
183 */
184 void
185 setAttr(uint32_t attr)
186 {
187 _attr = attr;
188 }
189 uint32_t
190 getAttr() const
191 {
192 return _attr;
193 }
194
195#if FULL_SYSTEM
196 Fault translateFs(RequestPtr req, ThreadContext *tc, Mode mode,
197 Translation *translation, bool &delay, bool timing);
198#else
199 Fault translateSe(RequestPtr req, ThreadContext *tc, Mode mode,
200 Translation *translation, bool &delay, bool timing);
201#endif
202 Fault translateAtomic(RequestPtr req, ThreadContext *tc, Mode mode);
203 Fault translateTiming(RequestPtr req, ThreadContext *tc,
204 Translation *translation, Mode mode);
205
206 // Checkpointing
207 void serialize(std::ostream &os);
208 void unserialize(Checkpoint *cp, const std::string §ion);
209
210 void regStats();
| 1/*
2 * Copyright (c) 2010 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder. You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Copyright (c) 2001-2005 The Regents of The University of Michigan
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution;
24 * neither the name of the copyright holders nor the names of its
25 * contributors may be used to endorse or promote products derived from
26 * this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Authors: Ali Saidi
41 */
42
43#ifndef __ARCH_ARM_TLB_HH__
44#define __ARCH_ARM_TLB_HH__
45
46#include <map>
47
48#include "arch/arm/isa_traits.hh"
49#include "arch/arm/utility.hh"
50#include "arch/arm/vtophys.hh"
51#include "arch/arm/pagetable.hh"
52#include "base/statistics.hh"
53#include "mem/request.hh"
54#include "params/ArmTLB.hh"
55#include "sim/fault.hh"
56#include "sim/tlb.hh"
57
58class ThreadContext;
59
60namespace ArmISA {
61
62class TableWalker;
63
64class TLB : public BaseTLB
65{
66 public:
67 enum ArmFlags {
68 AlignmentMask = 0x1f,
69
70 AlignByte = 0x0,
71 AlignHalfWord = 0x1,
72 AlignWord = 0x3,
73 AlignDoubleWord = 0x7,
74 AlignQuadWord = 0xf,
75 AlignOctWord = 0x1f,
76
77 AllowUnaligned = 0x20,
78 // Priv code operating as if it wasn't
79 UserMode = 0x40,
80 // Because zero otherwise looks like a valid setting and may be used
81 // accidentally, this bit must be non-zero to show it was used on
82 // purpose.
83 MustBeOne = 0x80
84 };
85 protected:
86
87 TlbEntry *table; // the Page Table
88 int size; // TLB Size
89
90 uint32_t _attr; // Memory attributes for last accessed TLB entry
91
92#if FULL_SYSTEM
93 TableWalker *tableWalker;
94#endif
95
96 /** Lookup an entry in the TLB
97 * @param vpn virtual address
98 * @param asn context id/address space id to use
99 * @param functional if the lookup should modify state
100 * @return pointer to TLB entrry if it exists
101 */
102 TlbEntry *lookup(Addr vpn, uint8_t asn, bool functional = false);
103
104 // Access Stats
105 mutable Stats::Scalar instHits;
106 mutable Stats::Scalar instMisses;
107 mutable Stats::Scalar readHits;
108 mutable Stats::Scalar readMisses;
109 mutable Stats::Scalar writeHits;
110 mutable Stats::Scalar writeMisses;
111 mutable Stats::Scalar inserts;
112 mutable Stats::Scalar flushTlb;
113 mutable Stats::Scalar flushTlbMva;
114 mutable Stats::Scalar flushTlbMvaAsid;
115 mutable Stats::Scalar flushTlbAsid;
116 mutable Stats::Scalar flushedEntries;
117 mutable Stats::Scalar alignFaults;
118 mutable Stats::Scalar prefetchFaults;
119 mutable Stats::Scalar domainFaults;
120 mutable Stats::Scalar permsFaults;
121
122 Stats::Formula readAccesses;
123 Stats::Formula writeAccesses;
124 Stats::Formula instAccesses;
125 Stats::Formula hits;
126 Stats::Formula misses;
127 Stats::Formula accesses;
128
129 int rangeMRU; //On lookup, only move entries ahead when outside rangeMRU
130
131 public:
132 typedef ArmTLBParams Params;
133 TLB(const Params *p);
134
135 virtual ~TLB();
136 int getsize() const { return size; }
137
138 void insert(Addr vaddr, TlbEntry &pte);
139
140 /** Reset the entire TLB */
141 void flushAll();
142
143 /** Remove any entries that match both a va and asn
144 * @param mva virtual address to flush
145 * @param asn contextid/asn to flush on match
146 */
147 void flushMvaAsid(Addr mva, uint64_t asn);
148
149 /** Remove any entries that match the asn
150 * @param asn contextid/asn to flush on match
151 */
152 void flushAsid(uint64_t asn);
153
154 /** Remove all entries that match the va regardless of asn
155 * @param mva address to flush from cache
156 */
157 void flushMva(Addr mva);
158
159 Fault trickBoxCheck(RequestPtr req, Mode mode, uint8_t domain, bool sNp);
160 Fault walkTrickBoxCheck(Addr pa, Addr va, Addr sz, bool is_exec,
161 bool is_write, uint8_t domain, bool sNp);
162
163 void printTlb();
164
165 void demapPage(Addr vaddr, uint64_t asn)
166 {
167 flushMvaAsid(vaddr, asn);
168 }
169
170 static bool validVirtualAddress(Addr vaddr);
171
172 /**
173 * Do a functional lookup on the TLB (for debugging)
174 * and don't modify any internal state
175 * @param tc thread context to get the context id from
176 * @param vaddr virtual address to translate
177 * @param pa returned physical address
178 * @return if the translation was successful
179 */
180 bool translateFunctional(ThreadContext *tc, Addr vaddr, Addr &paddr);
181
182 /** Accessor functions for memory attributes for last accessed TLB entry
183 */
184 void
185 setAttr(uint32_t attr)
186 {
187 _attr = attr;
188 }
189 uint32_t
190 getAttr() const
191 {
192 return _attr;
193 }
194
195#if FULL_SYSTEM
196 Fault translateFs(RequestPtr req, ThreadContext *tc, Mode mode,
197 Translation *translation, bool &delay, bool timing);
198#else
199 Fault translateSe(RequestPtr req, ThreadContext *tc, Mode mode,
200 Translation *translation, bool &delay, bool timing);
201#endif
202 Fault translateAtomic(RequestPtr req, ThreadContext *tc, Mode mode);
203 Fault translateTiming(RequestPtr req, ThreadContext *tc,
204 Translation *translation, Mode mode);
205
206 // Checkpointing
207 void serialize(std::ostream &os);
208 void unserialize(Checkpoint *cp, const std::string §ion);
209
210 void regStats();
|