1 | #include "Behavioural/include/SPR_access_mode.h" |
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2 | |
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3 | #include "Common/include/Debug.h" |
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4 | |
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5 | namespace morpheo { |
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6 | namespace behavioural { |
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7 | |
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8 | |
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9 | // SM : Supervisor Mode |
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10 | // * 0 : User Mode |
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11 | // * 1 : Supervisor Mode |
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12 | // SUMRA : SPRs User Mode Read Access |
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13 | // * 0 : All SPRs are inaccessible in user mode |
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14 | // * 1 : Certain SPRs can be read in user mode |
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15 | |
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16 | bool SPR_access_mode::read (spr_address_t address, Tcontrol_t SM, Tcontrol_t SUMRA) |
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17 | { |
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18 | // log_printf(TRACE,true,"SPR_access_mode::read","address [%d][%d]",address._group,address._register); |
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19 | // log_printf(TRACE,true,"SPR_access_mode::read","sm : %d",SM ); |
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20 | // log_printf(TRACE,true,"SPR_access_mode::read","sumra : %d",SUMRA); |
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21 | |
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22 | if (not exist(address)) |
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23 | return false; |
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24 | |
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25 | spr_access_mode_t mode = _spr_generic [address._group][address._register]; |
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26 | |
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27 | // log_printf(TRACE,true,"SPR_access_mode::read","kernel : %d",(int)mode._supervisor_access_mode); |
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28 | // log_printf(TRACE,true,"SPR_access_mode::read","user : %d",(int)mode._supervisor_access_mode); |
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29 | |
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30 | return (((SM == 1) and ( (mode._supervisor_access_mode == SPR_ACCESS_MODE_READ_ONLY ) or |
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31 | (mode._supervisor_access_mode == SPR_ACCESS_MODE_READ_WRITE ))) or |
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32 | ((SM == 0) and ( (mode._user_access_mode == SPR_ACCESS_MODE_READ_ONLY ) or |
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33 | (mode._user_access_mode == SPR_ACCESS_MODE_READ_WRITE ) or |
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34 | ((mode._user_access_mode == SPR_ACCESS_MODE_READ_ONLY_COND) and (SUMRA == 1))))); |
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35 | } |
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36 | |
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37 | bool SPR_access_mode::write(spr_address_t address, Tcontrol_t SM, Tcontrol_t SUMRA) |
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38 | { |
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39 | if (not exist(address)) |
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40 | return false; |
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41 | |
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42 | spr_access_mode_t mode = _spr_generic [address._group][address._register]; |
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43 | |
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44 | return (((SM == 1) and ( (mode._supervisor_access_mode == SPR_ACCESS_MODE_WRITE_ONLY ) or |
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45 | (mode._supervisor_access_mode == SPR_ACCESS_MODE_READ_WRITE ))) or |
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46 | ((SM == 0) and ( (mode._user_access_mode == SPR_ACCESS_MODE_WRITE_ONLY ) or |
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47 | (mode._user_access_mode == SPR_ACCESS_MODE_READ_WRITE )))) ; |
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48 | } |
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49 | |
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50 | }; // end namespace behavioural |
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51 | }; // end namespace morpheo |
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52 | |
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