58.5.2.2 ICM Region Configuration Structure Member
| Name: | ICM_RCFG |
| Property: | Read/Write |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| Access | |||||||||
| Reset |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| Access | |||||||||
| Reset |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| ALGO[2:0] | PROCDLY | SUIEN | ECIEN | ||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | |||
| Reset | |||||||||
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| WCIEN | BEIEN | DMIEN | RHIEN | EOM | WRAP | CDWBN | |||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | ||
| Reset |
Bits 14:12 – ALGO[2:0] SHA Algorithm
| Value | Name | Description |
|---|---|---|
| 0 | SHA1 | SHA1 algorithm processed |
| 1 | SHA256 | SHA256 algorithm processed |
| 4 | SHA224 | SHA224 algorithm processed |
Bit 10 – PROCDLY Processing Delay
When SHA256 or SHA224 algorithm is processed, the runtime period is either 72 or 194 clock cycles.
| Value | Name | Description |
|---|---|---|
| 0 | SHORTEST | SHA processing runtime is the shortest one. |
| 1 | LONGEST | SHA processing runtime is the longest one. |
Bit 9 – SUIEN Monitoring Status Updated Condition Interrupt (Default Enabled)
| Value | Description |
|---|---|
| 0 | The ICM_ISR.RSU[i] flag is set when the corresponding descriptor is loaded from memory to ICM. |
| 1 | The ICM_ISR.RSU[i] flag remains cleared even if the setting condition is met. |
Bit 8 – ECIEN End Bit Condition Interrupt (Default Enabled)
| Value | Description |
|---|---|
| 0 | The ICM_ISR.REC[i] flag is set when the descriptor with the EOM bit set is processed. |
| 1 | The ICM_ISR.REC[i] flag remains cleared even if the setting condition is met. |
Bit 7 – WCIEN Wrap Condition Interrupt Disable (Default Enabled)
| Value | Description |
|---|---|
| 0 | The ICM_ISR.RWC[i] flag is set when the WRAP bit is set in a descriptor of the main list. |
| 1 | ICM_ISR.RWC[i] flag remains cleared even if the setting condition is met. |
Bit 6 – BEIEN Bus Error Interrupt Disable (Default Enabled)
| Value | Description |
|---|---|
| 0 | The flag is set when an error is reported on the system bus by the bus matrix. |
| 1 | The flag remains cleared even if the setting condition is met. |
Bit 5 – DMIEN Digest Mismatch Interrupt Disable (Default Enabled)
| Value | Description |
|---|---|
| 0 | The ICM_ISR.RBE[i] flag is set when the hash value just calculated from the processed region differs from expected hash value. |
| 1 | The ICM_ISR.RBE[i] flag remains cleared even if the setting condition is met. |
Bit 4 – RHIEN Region Hash Completed Interrupt Disable (Default Enabled)
| Value | Description |
|---|---|
| 0 | The ICM_ISR.RHC[i] flag is set when the field NEXT = 0 in a descriptor of the main or second list. |
| 1 | The ICM_ISR.RHC[i] flag remains cleared even if the setting condition is met. |
Bit 2 – EOM End Of Monitoring
| Value | Description |
|---|---|
| 0 | The current descriptor does not terminate the monitoring. |
| 1 | The current descriptor terminates the Main List. WRAP value has no effect. |
Bit 1 – WRAP Wrap Command
| Value | Description |
|---|---|
| 0 | The next region descriptor address loaded is the current region identifier descriptor address incremented by 0x10. |
| 1 | The next region descriptor address loaded is ICM_DSCR. |
Bit 0 – CDWBN Compare Digest or Write Back Digest
| Value | Description |
|---|---|
| 0 | The digest is written to the Hash area. |
| 1 | The digest value is compared to the digest stored in the Hash area. |