B2.50 ERXPFGCTL_EL1, Selected Error Pseudo Fault Generation Control Register, EL1

Register ERXPFGCTL_EL1 accesses the ERR<n>PFGCTL register for the error record selected by ERRSELR_EL1.SEL.

If ERRSELR_EL1.SEL==0, then ERXPFGCTL_EL1 accesses the ERR0PFGCTL register of the core error record. See B3.8 ERR0PFGCTL, Error Pseudo Fault Generation Control Register.

If ERRSELR_EL1.SEL==1, then ERXPFGCTL_EL1 accesses the ERR1PFGCTL register of the DSU error record. See the Arm® DynamIQ™ Shared Unit Technical Reference Manual.


There are no configuration notes.

Accessing the ERXPFGCTL_EL1

This register can be read using MRS with the following syntax:

MRS <Xt>,<systemreg>

This register can be written using MSR with the following syntax:

MSR <Xt>,<systemreg>

This syntax is encoded with the following settings in the instruction encoding:

<systemreg> op0 op1 CRn CRm op2
S3_0_C15_C2_1 11 000 1111 0010 001

This register is accessible in software as follows:

<syntax> Control Accessibility
S3_0_C15_C2_1 x x 0 - RW n/a RW
S3_0_C15_C2_1 x 0 1 - RW RW RW
S3_0_C15_C2_1 x 1 1 - n/a RW RW

'n/a' Not accessible. The PE cannot be executing at this Exception level, so this access is not possible.

Traps and enables

For a description of the prioritization of any generated exceptions, see Exception priority order in the Arm® Architecture Reference Manual Armv8, for Armv8-A architecture profile for exceptions taken to AArch32 state, and see Synchronous exception prioritization for exceptions taken to AArch64 state. Subject to these prioritization rules, the following traps and enables are applicable when accessing this register.

ERXPFGCTL_EL1 is accessible at EL3 and can be accessible at EL1 and EL2 depending on the value of bit[5] in ACTLR_EL2 and ACTLR_EL3. See B2.6 ACTLR_EL2, Auxiliary Control Register, EL2 and B2.7 ACTLR_EL3, Auxiliary Control Register, EL3.


If ERXPFGCTL_EL1 is accessible at EL1 and HCR_EL2.TERR == 1, then direct reads and writes of ERXPFGCTL_EL1 at Non-secure EL1 generate a Trap exception to EL2.

If ERXPFGCTL_EL1 is accessible at EL1 or EL2 and SCR_EL3.TERR == 1, then direct reads and writes of ERXPFGCTL_EL1 at EL1 or EL2 generate a Trap exception to EL3.

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