| Field Name | Bits | Type | Reset Value | Description |
|---|
| EXLEVEL_NS | 15:12 | rwNormal read/write | 0x0 | In Non-secure state, each bit controls whether a comparison can occur for the corresponding exception level:The exception levels are:Bit[12]Exception level 0. Bit[13]Exception level 1.Bit[14]Exception level 2.Bit[15]RAZ/WI. EXLEVEL_NS[3] is never implemented.The content of the field is IMPLEMENTATION DEFINED and is set by the value of IDR3.EXLEVEL_NS. Unimplemented bits are RAZ/WI. |
| EXLEVEL_S | 11:8 | rwNormal read/write | 0x0 | In Secure state, each bit controls whether a comparison can occur for the corresponding exception level:The exception levels are:Bit[8]Exception level 0. Bit[9]Exception level 1.Bit[10]RAZ/WI. EXLEVEL_S[2] is never implemented.Bit[11]Exception level 3.The content of the field is IMPLEMENTATION DEFINED and is set by the value of IDR3.EXLEVEL_S. Unimplemented bits are RAZ/WI. |
| Context_type | 3:2 | rwNormal read/write | 0 | If IDR4. NUMVMIDC>0 and IDR4.NUMCIDC>0, this field controls whether the trace unit performs a Context ID comparison, a virtual machine identifier (VMID) comparison, or both comparisons:If IDR4.NUMVMIDC==0 and IDR4.NUMCIDC>0, bit [3] is RES0 and bit[2] controls whether the trace unit performs a Context ID comparison, as with cases 0b00 and 0b01 above.If IDR4.NUMVMIDC==0 and IDR4.NUMCIDC==0, both bits are RES0. |
| Type | 1:0 | roRead-only | 0x0 | Controls what type of comparison the trace unit performs:If IDR4. SUPPDAC does not indicate that data address comparisons are implemented, then this field is RES0. This means that any comparison performed by this address comparator is an instruction address comparison. |