Last change
on this file since 87 was
81,
checked in by rosiere, 16 years ago
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- Finish Environment (and test)
- Continue predictor_unit
- Add external tools
- svn keyword "Id" set
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-
Property svn:keywords set to
Id
|
File size:
1.7 KB
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1 | #include "Behavioural/include/SPR_access_mode.h" |
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2 | |
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3 | namespace morpheo { |
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4 | namespace behavioural { |
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5 | |
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6 | |
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7 | // SM : Supervisor Mode |
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8 | // * 0 : User Mode |
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9 | // * 1 : Supervisor Mode |
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10 | // SUMRA : SPRs User Mode Read Access |
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11 | // * 0 : All SPRs are inaccessible in user mode |
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12 | // * 1 : Certain SPRs can be read in user mode |
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13 | |
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14 | bool SPR_access_mode::read (spr_address_t address, Tcontrol_t SM, Tcontrol_t SUMRA) |
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15 | { |
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16 | if (not valid(address)) |
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17 | return false; |
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18 | |
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19 | spr_access_mode_t mode = _spr_generic [address._group][address._register]; |
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20 | |
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21 | return (((SM == 1) and ( (mode._supervisor_access_mode == SPR_ACCESS_MODE_READ_ONLY ) or |
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22 | (mode._supervisor_access_mode == SPR_ACCESS_MODE_READ_WRITE ))) or |
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23 | ((SM == 0) and ( (mode._user_access_mode == SPR_ACCESS_MODE_READ_ONLY ) or |
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24 | (mode._user_access_mode == SPR_ACCESS_MODE_READ_WRITE ) or |
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25 | ((mode._user_access_mode == SPR_ACCESS_MODE_READ_ONLY_COND) and (SUMRA == 1))))); |
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26 | } |
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27 | |
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28 | bool SPR_access_mode::write(spr_address_t address, Tcontrol_t SM, Tcontrol_t SUMRA) |
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29 | { |
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30 | if (not valid(address)) |
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31 | return false; |
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32 | |
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33 | spr_access_mode_t mode = _spr_generic [address._group][address._register]; |
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34 | |
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35 | return (((SM == 1) and ( (mode._supervisor_access_mode == SPR_ACCESS_MODE_WRITE_ONLY ) or |
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36 | (mode._supervisor_access_mode == SPR_ACCESS_MODE_READ_WRITE ))) or |
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37 | ((SM == 0) and ( (mode._user_access_mode == SPR_ACCESS_MODE_WRITE_ONLY ) or |
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38 | (mode._user_access_mode == SPR_ACCESS_MODE_READ_WRITE )))) ; |
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39 | } |
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40 | |
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41 | }; // end namespace behavioural |
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42 | }; // end namespace morpheo |
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43 | |
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