REVIDR_EL1, Revision ID Register

The REVIDR_EL1 characteristics are:

Purpose

Provides implementation-specific minor revision information.

Configuration

AArch64 System register REVIDR_EL1 bits [31:0] are architecturally mapped to AArch32 System register REVIDR[31:0] .

If REVIDR_EL1 has the same value as MIDR_EL1, then its contents have no significance.

Attributes

REVIDR_EL1 is a 64-bit register.

Field descriptions

The REVIDR_EL1 bit assignments are:

6362616059585756555453525150494847464544434241403938373635343332
IMPLEMENTATION DEFINED
IMPLEMENTATION DEFINED
313029282726252423222120191817161514131211109876543210

IMPLEMENTATION DEFINED, bits [63:0]

IMPLEMENTATION DEFINED.

Accessing the REVIDR_EL1

Accesses to this register use the following encodings:

MRS <Xt>, REVIDR_EL1

op0op1CRnCRmop2
0b110b0000b00000b00000b110

if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if IsFeatureImplemented("Morello") && !CapIsSystemAccessEnabled() && !Halted() then if TargetELForCapabilityExceptions() == EL1 then AArch64.SystemAccessTrap(EL1, 0x18); elsif TargetELForCapabilityExceptions() == EL2 then AArch64.SystemAccessTrap(EL2, 0x18); else AArch64.SystemAccessTrap(EL3, 0x18); elsif EL2Enabled() && !ELUsingAArch32(EL2) && HCR_EL2.TID1 == '1' then AArch64.SystemAccessTrap(EL2, 0x18); else return REVIDR_EL1; elsif PSTATE.EL == EL2 then if IsFeatureImplemented("Morello") && !CapIsSystemAccessEnabled() && !Halted() then if TargetELForCapabilityExceptions() == EL2 then AArch64.SystemAccessTrap(EL2, 0x18); else AArch64.SystemAccessTrap(EL3, 0x18); else return REVIDR_EL1; elsif PSTATE.EL == EL3 then if IsFeatureImplemented("Morello") && !CapIsSystemAccessEnabled() && !Halted() then AArch64.SystemAccessTrap(EL3, 0x18); else return REVIDR_EL1;




12/01/2022 09:56; 05a4944b4b04e7ab50def8c126b479d22136f35b

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