25.6.3.1.2 Region Configuration Structure Member
| Name: | RCFG |
| Offset: | 0x04 |
| Reset: | 0x00000000 |
| 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 | 0 | 0 | 0 | 0 | 1 | 1 | |||
| 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 | 1 | 1 | 1 | 1 | 0 | 0 | 0 |
Bits 14:12 – ALGO[2:0] User SHA Algorithm
| Value | Name | Description |
|---|---|---|
| 0 | SHA1 |
SHA1 algorithm processed |
| 1 | SHA256 |
SHA256 algorithm processed |
| Other | - | Reserved |
Bit 10 – PROCDLY Processing Delay
| Algorithm | SHORTEST [number of cycles] | LONGEST [number of cycles] |
|---|---|---|
| SHA1 | 85 | 209 |
| SHA256 | 72 | 194 |
| 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 Enable
0: The RSU flag is set when the corresponding descriptor is
loaded from memory to ICM.
1: The RSU flag remains cleared even if the condition is
met.
Bit 8 – ECIEN End Bit Condition Interrupt Enable
0: The REC flag is set when the descriptor having the EOM bit
set is processed.
1: The REC flag remains cleared even if the setting condition is
met.
Bit 7 – WCIEN Wrap Condition Interrupt Disable
0: The RWC flag is set when the WRAP
1: The RWC flag remains cleared even if the setting condition is
met.
Bit 6 – BEIEN Bus Error Interrupt Disable
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
0: The RBE flag is set when the hash value just calculated from
the processed region dffers from expected hash value.
1: The RBE flag remains cleared even if the setting condition is
met.
Bit 4 – RHIEN Region Hash Completed Interrupt Disable
0: The RHC flag is set when the field NEXT = 0 in a descriptor
of the main or second list.
1: The RHC flag remains cleared even if the setting condition is
met.
Bit 2 – EOM End of Monitoring
0: The current descriptor does not terminate the monitoring.
1: The current descriptor terminates the Main List. WRAP bit
value has no effect.
Bit 1 – WRAP Wrap Command
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 DSCR.
Bit 0 – CDWBN Compare Digest or Write Back Digest
0: The digest is written to the Hash area.
1: The digest value is compared to the digest stored in the Hash
area.