CNTV_CVAL Counter-timer Virtual Timer CompareValue It is IMPLEMENTATION DEFINED whether CNTV_CVAL is implemented in the Core power domain or in the Debug power domain Timer CNTBaseN 0x030 CNTV_CVAL RW Timer CNTBaseN 0x034 CNTV_CVAL RW Timer CNTEL0BaseN 0x030 CNTV_CVAL RW Timer CNTEL0BaseN 0x034 CNTV_CVAL RW Holds the 64-bit compare value for the virtual timer. Timer For more information, see 'Power and reset domains for the system level implementation of the Generic Timer'. CNTV_CVAL is a 64-bit register. CompareValue 63 0 63:0 Holds the virtual timer CompareValue. When CNTV_CTL.ENABLE is 1, the timer condition is met when (CNTVCT - CompareValue) is greater than or equal to zero. This means that CompareValue acts like a 64-bit upcounter timer. When the timer condition is met: CNTV_CTL.ISTATUS is set to 1. An interrupt is generated if CNTV_CTL.IMASK is 0. When CNTV_CTL.ENABLE is 0, the timer condition is not met, but CNTVCT continues to count. AU CNTV_CVAL can be implemented in any implemented CNTBaseN frame that has virtual timer capability, and in the corresponding CNTEL0BaseN frame. 'CNTCTLBase status and control fields for the CNTBaseN and CNTEL0BaseN frames' describes the status fields that identify whether a CNTBaseN frame is implemented, and for an implemented frame: Whether the CNTBaseN frame has virtual timer capability. Whether the corresponding CNTEL0BaseN frame is implemented. For an implementation that supports the Realm Management Extension, whether the CNTBaseN frame, and any corresponding CNTEL0BaseN frame, is accessible by Root and Realm accesses. For an implementation that recognizes two Security states, whether the CNTBaseN frame, and any corresponding CNTEL0BaseN frame, is accessible by Non-secure accesses. The CNTBaseN frame is always accessible by Secure accesses. For an implemented CNTBaseN frame that has virtual timer capability: CNTV_CVAL is accessible in that frame if the value of CNTACR<n>.RWVT is 1. Otherwise, the CNTV_CVAL address in that frame is RAZ/WI. For an implemented CNTEL0BaseN frame: CNTV_CVAL is accessible in that frame if both: CNTV_CVAL is accessible in the corresponding CNTBaseN frame: The value of CNTEL0ACR.EL0VTEN is 1. Otherwise, the CNTV_CVAL address in that frame is RAZ/WI. If the implementation supports 64-bit atomic accesses, then the CNTV_CVAL register must be accessible as an atomic 64-bit value. 2026-03-26 20:27:25 2026-03_rel