[72] | 1 | #include "Behavioural/include/SPR_access_mode.h" |
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| 2 | |
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[88] | 3 | #include "Common/include/Debug.h" |
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| 4 | |
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[72] | 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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[88] | 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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[72] | 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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[88] | 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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[72] | 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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[88] | 39 | if (not exist(address)) |
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[72] | 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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