| 1 | // Copyright © 2004-2006 University of Helsinki, Department of Computer Science | |
| 2 | // Copyright © 2012 various contributors | |
| 3 | // This software is released under GNU Lesser General Public License 2.1. | |
| 4 | // The license text is at http://www.gnu.org/licenses/lgpl-2.1.html | |
| 5 | ||
| 6 | package fi.helsinki.cs.titokone.devices; | |
| 7 | ||
| 8 | import fi.helsinki.cs.titokone.*; | |
| 9 | import fi.helsinki.cs.ttk91.TTK91AddressOutOfBounds; | |
| 10 | ||
| 11 | import java.util.HashMap; | |
| 12 | ||
| 13 | /** | |
| 14 | * a nice nastiness of a device which registers itself as an io device | |
| 15 | * and takes over memory management. | |
| 16 | * <p/> | |
| 17 | * write to port 0 to map memory | |
| 18 | * 0xFFFFFFFF will reset MMU | |
| 19 | * to map memory write 3 values "from" "to" and "length" | |
| 20 | * currently only 1 mapping can be active at one time. | |
| 21 | * new mapping will overwrite the old one | |
| 22 | * <p/> | |
| 23 | * reading port 0 will tell you the state of mapping command | |
| 24 | * 0=from,1=to,2=length | |
| 25 | * NOTE: currently virtual memory size is fixed to the "physical memory" | |
| 26 | * size together with MMAPped devices. MMU can only be used | |
| 27 | * to move memory to a more convenient place | |
| 28 | */ | |
| 29 | public abstract class MMU | |
| 30 | implements IODevice, | |
| 31 | RandomAccessMemory, | |
| 32 | InterruptGenerator { | |
| 33 | 9 | int from = 0, to = 0, length = 0; |
| 34 | 3 | int count = 0; |
| 35 | ||
| 36 | public MMU() { | |
| 37 | } | |
| 38 | ||
| 39 | public void link(Interruptable il) { | |
| 40 | //just a reservation | |
| 41 | } | |
| 42 | ||
| 43 | public void reset() { | |
| 44 | 3 | from = 0; |
| 45 | 3 | to = 0; |
| 46 | 3 | length = 0; |
| 47 | 3 | count = 0; |
| 48 | } | |
| 49 | ||
| 50 | public int getPortCount() { | |
| 51 | 3 | return 5; //reserve a couple ports |
| 52 | } | |
| 53 | ||
| 54 | public int getPort(int i) { | |
| 55 | 5 | if (i < 0 || i >= getPortCount()) { |
| 56 | 1 | throw new RuntimeException("shouldnt happen"); |
| 57 | } | |
| 58 | 1 | return count; |
| 59 | } | |
| 60 | ||
| 61 | public void setPort(int i, int value) { | |
| 62 | 5 | if (i < 0 || i >= getPortCount()) { |
| 63 | 1 | throw new RuntimeException("shouldnt happen"); |
| 64 | } | |
| 65 | switch (count) { | |
| 66 | case 0: | |
| 67 | 3 | if (value == 0xffffffff) { |
| 68 | 3 | count = 0; |
| 69 | 3 | from = 0; |
| 70 | 3 | to = 0; |
| 71 | } else { | |
| 72 | 1 | from = value; |
| 73 | 4 | count++; |
| 74 | } | |
| 75 | break; | |
| 76 | case 1: | |
| 77 | 1 | to = value; |
| 78 | 4 | count++; |
| 79 | break; | |
| 80 | case 2: | |
| 81 | 1 | length = value; |
| 82 | 3 | count = 0; |
| 83 | break; | |
| 84 | } | |
| 85 | } | |
| 86 | ||
| 87 | public void update() { | |
| 88 | } | |
| 89 | ||
| 90 | public int getSize() { | |
| 91 | 3 | return getMem().getSize(); |
| 92 | } | |
| 93 | ||
| 94 | public int getCodeAreaSize() { | |
| 95 | 3 | return getMem().getCodeAreaSize(); |
| 96 | } | |
| 97 | ||
| 98 | public int getDataAreaSize() { | |
| 99 | 3 | return getMem().getDataAreaSize(); |
| 100 | } | |
| 101 | ||
| 102 | public MemoryLine getMemoryLine(int index) { | |
| 103 | 4 | return getMem().getMemoryLine(mapslot(index)); |
| 104 | } | |
| 105 | ||
| 106 | public MemoryLine[] getMemoryLines() { | |
| 107 | 2 | MemoryLine[] ret = getMem().getMemoryLines(); |
| 108 | 3 | if (from != 0 || to != 0 || length != 0) { |
| 109 | 5 | for (int i = 0; i < length; i++) { |
| 110 | 4 | ret[to + i] = getMem().getMemoryLine(from + i); |
| 111 | } | |
| 112 | } | |
| 113 | 1 | return ret; |
| 114 | } | |
| 115 | ||
| 116 | public void setSymbolTable(SymbolTable symbols) { | |
| 117 | 2 | getMem().setSymbolTable(symbols); |
| 118 | } | |
| 119 | ||
| 120 | public void setMemoryLine(int index, MemoryLine memoryLine) | |
| 121 | throws TTK91AddressOutOfBounds { | |
| 122 | 3 | getMem().setMemoryLine(mapslot(index), memoryLine); |
| 123 | } | |
| 124 | ||
| 125 | public void setCodeAreaLength(int size) { | |
| 126 | 2 | getMem().setCodeAreaLength(size); |
| 127 | } | |
| 128 | ||
| 129 | public void setDataAreaLength(int size) { | |
| 130 | 2 | getMem().setDataAreaLength(size); |
| 131 | } | |
| 132 | ||
| 133 | public int getMemoryReferences() { | |
| 134 | 3 | return getMem().getMemoryReferences(); |
| 135 | } | |
| 136 | ||
| 137 | public int getValue(int memoryslot) { | |
| 138 | 3 | return getMemoryLine(memoryslot).getBinary(); |
| 139 | } | |
| 140 | ||
| 141 | protected int mapslot(int slot) { | |
| 142 | 3 | if (from != 0 || to != 0 || length != 0) { |
| 143 | 3 | return slot - to + from; |
| 144 | } | |
| 145 | ||
| 146 | 1 | return slot; |
| 147 | } | |
| 148 | ||
| 149 | public HashMap<String, Integer> getSymbolTable() { | |
| 150 | 3 | return getMem().getSymbolTable(); |
| 151 | } | |
| 152 | ||
| 153 | public int[] getMemory() { | |
| 154 | 1 | MemoryLine[] temp = getMemoryLines(); |
| 155 | int[] ret = new int[temp.length]; | |
| 156 | 5 | for (int i = 0; i < temp.length; i++) { |
| 157 | 1 | ret[i] = temp[i].getBinary(); |
| 158 | } | |
| 159 | 1 | return ret; |
| 160 | } | |
| 161 | ||
| 162 | public int[] getCodeArea() { | |
| 163 | 1 | int[] codeArea = new int[getCodeAreaSize()]; |
| 164 | 5 | for (int i = 0; i < codeArea.length; i++) { |
| 165 | 2 | codeArea[i] = getMemoryLine(i).getBinary(); |
| 166 | } | |
| 167 | 1 | return codeArea; |
| 168 | } | |
| 169 | ||
| 170 | public int[] getDataArea() { | |
| 171 | 1 | int cz = getCodeAreaSize(); |
| 172 | 1 | int[] dataArea = new int[getDataAreaSize()]; |
| 173 | 5 | for (int i = 0; i < dataArea.length; i++) { |
| 174 | 3 | dataArea[i] = getMemoryLine(i + cz).getBinary(); |
| 175 | } | |
| 176 | 1 | return dataArea; |
| 177 | } | |
| 178 | ||
| 179 | /** | |
| 180 | * override this to return the memory instance currently active. | |
| 181 | */ | |
| 182 | protected abstract RandomAccessMemory getMem(); | |
| 183 | ||
| 184 | } | |
Mutations | ||
| 33 |
Substituted 0 with 1 : SURVIVED Removed assignment to member variable from : SURVIVED Substituted 0 with 1 : KILLED -> fi.helsinki.cs.titokone.ControlTest.testLoad(fi.helsinki.cs.titokone.ControlTest) Removed assignment to member variable to : SURVIVED Substituted 0 with 1 : SURVIVED Substituted 0 with 1 : SURVIVED Substituted 0 with 1 : SURVIVED Substituted 0 with 1 : KILLED -> fi.helsinki.cs.titokone.ControlTest.testLoad(fi.helsinki.cs.titokone.ControlTest) Removed assignment to member variable length : SURVIVED |
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| 34 |
Removed assignment to member variable count : SURVIVED Substituted 0 with 1 : SURVIVED Substituted 0 with 1 : SURVIVED |
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| 44 |
Substituted 0 with 1 : SURVIVED Substituted 0 with 1 : SURVIVED Removed assignment to member variable from : SURVIVED |
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| 45 |
Substituted 0 with 1 : KILLED -> fi.helsinki.cs.titokone.ControlTest.testLoad(fi.helsinki.cs.titokone.ControlTest) Substituted 0 with 1 : KILLED -> fi.helsinki.cs.titokone.ControlTest.testLoad(fi.helsinki.cs.titokone.ControlTest) Removed assignment to member variable to : SURVIVED |
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| 46 |
Substituted 0 with 1 : SURVIVED Substituted 0 with 1 : SURVIVED Removed assignment to member variable length : SURVIVED |
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| 47 |
Substituted 0 with 1 : SURVIVED Substituted 0 with 1 : SURVIVED Removed assignment to member variable count : SURVIVED |
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| 51 |
Substituted 5 with 6 : SURVIVED Substituted 5 with -1 : SURVIVED replaced return of integer sized value with (x == 0 ? 1 : 0) : SURVIVED |
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| 55 |
negated conditional : NO_COVERAGE removed call to fi/helsinki/cs/titokone/devices/MMU::getPortCount : NO_COVERAGE changed conditional boundary : NO_COVERAGE changed conditional boundary : NO_COVERAGE negated conditional : NO_COVERAGE |
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| 56 |
removed call to java/lang/RuntimeException::<init> : NO_COVERAGE |
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| 58 |
replaced return of integer sized value with (x == 0 ? 1 : 0) : NO_COVERAGE |
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| 62 |
changed conditional boundary : NO_COVERAGE negated conditional : NO_COVERAGE removed call to fi/helsinki/cs/titokone/devices/MMU::getPortCount : NO_COVERAGE changed conditional boundary : NO_COVERAGE negated conditional : NO_COVERAGE |
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| 63 |
removed call to java/lang/RuntimeException::<init> : NO_COVERAGE |
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| 67 |
Substituted -1 with 0 : NO_COVERAGE Substituted -1 with 1 : NO_COVERAGE negated conditional : NO_COVERAGE |
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| 68 |
Substituted 0 with 1 : NO_COVERAGE Removed assignment to member variable count : NO_COVERAGE Substituted 0 with 1 : NO_COVERAGE |
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| 69 |
Removed assignment to member variable from : NO_COVERAGE Substituted 0 with 1 : NO_COVERAGE Substituted 0 with 1 : NO_COVERAGE |
|
| 70 |
Substituted 0 with 1 : NO_COVERAGE Removed assignment to member variable to : NO_COVERAGE Substituted 0 with 1 : NO_COVERAGE |
|
| 72 |
Removed assignment to member variable from : NO_COVERAGE |
|
| 73 |
Substituted 1 with 0 : NO_COVERAGE Removed assignment to member variable count : NO_COVERAGE Replaced integer addition with subtraction : NO_COVERAGE Substituted 1 with 0 : NO_COVERAGE |
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| 77 |
Removed assignment to member variable to : NO_COVERAGE |
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| 78 |
Removed assignment to member variable count : NO_COVERAGE Substituted 1 with 0 : NO_COVERAGE Substituted 1 with 0 : NO_COVERAGE Replaced integer addition with subtraction : NO_COVERAGE |
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| 81 |
Removed assignment to member variable length : NO_COVERAGE |
|
| 82 |
Substituted 0 with 1 : NO_COVERAGE Removed assignment to member variable count : NO_COVERAGE Substituted 0 with 1 : NO_COVERAGE |
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| 91 |
removed call to fi/helsinki/cs/titokone/devices/MMU::getMem : KILLED -> fi.helsinki.cs.titokone.ControlTest.testChangeMemorySize(fi.helsinki.cs.titokone.ControlTest) removed call to fi/helsinki/cs/titokone/RandomAccessMemory::getSize : KILLED -> fi.helsinki.cs.titokone.ControlTest.testChangeMemorySize(fi.helsinki.cs.titokone.ControlTest) replaced return of integer sized value with (x == 0 ? 1 : 0) : KILLED -> fi.helsinki.cs.titokone.ControlTest.testChangeMemorySize(fi.helsinki.cs.titokone.ControlTest) |
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| 95 |
replaced return of integer sized value with (x == 0 ? 1 : 0) : NO_COVERAGE removed call to fi/helsinki/cs/titokone/RandomAccessMemory::getCodeAreaSize : NO_COVERAGE removed call to fi/helsinki/cs/titokone/devices/MMU::getMem : NO_COVERAGE |
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| 99 |
removed call to fi/helsinki/cs/titokone/RandomAccessMemory::getDataAreaSize : NO_COVERAGE removed call to fi/helsinki/cs/titokone/devices/MMU::getMem : NO_COVERAGE replaced return of integer sized value with (x == 0 ? 1 : 0) : NO_COVERAGE |
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| 103 |
mutated return of Object value for fi/helsinki/cs/titokone/devices/MMU::getMemoryLine to ( if (x != null) null else throw new RuntimeException ) : KILLED -> fi.helsinki.cs.titokone.ControlTest.testLoad(fi.helsinki.cs.titokone.ControlTest) removed call to fi/helsinki/cs/titokone/RandomAccessMemory::getMemoryLine : KILLED -> fi.helsinki.cs.titokone.ControlTest.testLoad(fi.helsinki.cs.titokone.ControlTest) removed call to fi/helsinki/cs/titokone/devices/MMU::mapslot : SURVIVED removed call to fi/helsinki/cs/titokone/devices/MMU::getMem : KILLED -> fi.helsinki.cs.titokone.ControlTest.testLoad(fi.helsinki.cs.titokone.ControlTest) |
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| 107 |
removed call to fi/helsinki/cs/titokone/devices/MMU::getMem : NO_COVERAGE removed call to fi/helsinki/cs/titokone/RandomAccessMemory::getMemoryLines : NO_COVERAGE |
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| 108 |
negated conditional : NO_COVERAGE negated conditional : NO_COVERAGE negated conditional : NO_COVERAGE |
|
| 109 |
Substituted 0 with 1 : NO_COVERAGE changed conditional boundary : NO_COVERAGE Substituted 0 with 1 : NO_COVERAGE Changed increment from 1 to -1 : NO_COVERAGE negated conditional : NO_COVERAGE |
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| 110 |
removed call to fi/helsinki/cs/titokone/devices/MMU::getMem : NO_COVERAGE Replaced integer addition with subtraction : NO_COVERAGE removed call to fi/helsinki/cs/titokone/RandomAccessMemory::getMemoryLine : NO_COVERAGE Replaced integer addition with subtraction : NO_COVERAGE |
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| 113 |
mutated return of Object value for fi/helsinki/cs/titokone/devices/MMU::getMemoryLines to ( if (x != null) null else throw new RuntimeException ) : NO_COVERAGE |
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| 117 |
removed call to fi/helsinki/cs/titokone/devices/MMU::getMem : NO_COVERAGE removed call to fi/helsinki/cs/titokone/RandomAccessMemory::setSymbolTable : NO_COVERAGE |
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| 122 |
removed call to fi/helsinki/cs/titokone/devices/MMU::getMem : KILLED -> fi.helsinki.cs.titokone.ControlTest.testLoad(fi.helsinki.cs.titokone.ControlTest) removed call to fi/helsinki/cs/titokone/RandomAccessMemory::setMemoryLine : SURVIVED removed call to fi/helsinki/cs/titokone/devices/MMU::mapslot : SURVIVED |
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| 126 |
removed call to fi/helsinki/cs/titokone/devices/MMU::getMem : KILLED -> fi.helsinki.cs.titokone.ControlTest.testLoad(fi.helsinki.cs.titokone.ControlTest) removed call to fi/helsinki/cs/titokone/RandomAccessMemory::setCodeAreaLength : SURVIVED |
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| 130 |
removed call to fi/helsinki/cs/titokone/devices/MMU::getMem : KILLED -> fi.helsinki.cs.titokone.ControlTest.testLoad(fi.helsinki.cs.titokone.ControlTest) removed call to fi/helsinki/cs/titokone/RandomAccessMemory::setDataAreaLength : SURVIVED |
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| 134 |
removed call to fi/helsinki/cs/titokone/devices/MMU::getMem : NO_COVERAGE removed call to fi/helsinki/cs/titokone/RandomAccessMemory::getMemoryReferences : NO_COVERAGE replaced return of integer sized value with (x == 0 ? 1 : 0) : NO_COVERAGE |
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| 138 |
removed call to fi/helsinki/cs/titokone/devices/MMU::getMemoryLine : KILLED -> fi.helsinki.cs.titokone.ControlTest.testLoad(fi.helsinki.cs.titokone.ControlTest) replaced return of integer sized value with (x == 0 ? 1 : 0) : SURVIVED removed call to fi/helsinki/cs/titokone/MemoryLine::getBinary : SURVIVED |
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| 142 |
negated conditional : SURVIVED negated conditional : SURVIVED negated conditional : SURVIVED |
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| 143 |
Replaced integer addition with subtraction : NO_COVERAGE Replaced integer subtraction with addition : NO_COVERAGE replaced return of integer sized value with (x == 0 ? 1 : 0) : NO_COVERAGE |
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| 146 |
replaced return of integer sized value with (x == 0 ? 1 : 0) : SURVIVED |
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| 150 |
mutated return of Object value for fi/helsinki/cs/titokone/devices/MMU::getSymbolTable to ( if (x != null) null else throw new RuntimeException ) : NO_COVERAGE removed call to fi/helsinki/cs/titokone/RandomAccessMemory::getSymbolTable : NO_COVERAGE removed call to fi/helsinki/cs/titokone/devices/MMU::getMem : NO_COVERAGE |
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| 154 |
removed call to fi/helsinki/cs/titokone/devices/MMU::getMemoryLines : NO_COVERAGE |
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| 156 |
negated conditional : NO_COVERAGE Substituted 0 with 1 : NO_COVERAGE Changed increment from 1 to -1 : NO_COVERAGE Substituted 0 with 1 : NO_COVERAGE changed conditional boundary : NO_COVERAGE |
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| 157 |
removed call to fi/helsinki/cs/titokone/MemoryLine::getBinary : NO_COVERAGE |
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| 159 |
mutated return of Object value for fi/helsinki/cs/titokone/devices/MMU::getMemory to ( if (x != null) null else throw new RuntimeException ) : NO_COVERAGE |
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| 163 |
removed call to fi/helsinki/cs/titokone/devices/MMU::getCodeAreaSize : NO_COVERAGE |
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| 164 |
negated conditional : NO_COVERAGE Substituted 0 with 1 : NO_COVERAGE Changed increment from 1 to -1 : NO_COVERAGE changed conditional boundary : NO_COVERAGE Substituted 0 with 1 : NO_COVERAGE |
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| 165 |
removed call to fi/helsinki/cs/titokone/devices/MMU::getMemoryLine : NO_COVERAGE removed call to fi/helsinki/cs/titokone/MemoryLine::getBinary : NO_COVERAGE |
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| 167 |
mutated return of Object value for fi/helsinki/cs/titokone/devices/MMU::getCodeArea to ( if (x != null) null else throw new RuntimeException ) : NO_COVERAGE |
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| 171 |
removed call to fi/helsinki/cs/titokone/devices/MMU::getCodeAreaSize : NO_COVERAGE |
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| 172 |
removed call to fi/helsinki/cs/titokone/devices/MMU::getDataAreaSize : NO_COVERAGE |
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| 173 |
Substituted 0 with 1 : NO_COVERAGE Changed increment from 1 to -1 : NO_COVERAGE changed conditional boundary : NO_COVERAGE Substituted 0 with 1 : NO_COVERAGE negated conditional : NO_COVERAGE |
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| 174 |
removed call to fi/helsinki/cs/titokone/MemoryLine::getBinary : NO_COVERAGE removed call to fi/helsinki/cs/titokone/devices/MMU::getMemoryLine : NO_COVERAGE Replaced integer addition with subtraction : NO_COVERAGE |
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| 176 |
mutated return of Object value for fi/helsinki/cs/titokone/devices/MMU::getDataArea to ( if (x != null) null else throw new RuntimeException ) : NO_COVERAGE |