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