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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 if IsFeatureImplemented("FEAT_IDST") then if EL2Enabled() && HCR_EL2.TGE == '1' then AArch64.SystemAccessTrap(EL2, 0x18); else AArch64.SystemAccessTrap(EL1, 0x18); else UNDEFINED; elsif PSTATE.EL == EL1 then if EL2Enabled() && HCR_EL2.TID1 == '1' then AArch64.SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && (!HaveEL(EL3) || SCR_EL3.FGTEn == '1') && HFGRTR_EL2.REVIDR_EL1 == '1' then AArch64.SystemAccessTrap(EL2, 0x18); else return REVIDR_EL1; elsif PSTATE.EL == EL2 then return REVIDR_EL1; elsif PSTATE.EL == EL3 then return REVIDR_EL1;

Accessing the REVIDR_EL1

Accesses to this register use the following encodings:

MRS <Xt>, REVIDR_EL1

op0op1CRnCRmop2
0b110b0000b00000b00000b110

if PSTATE.EL == EL0 then if IsFeatureImplemented(FEAT_IDST) then if EL2Enabled() && HCR_EL2.TGE == '1' then AArch64.SystemAccessTrap(EL2, 0x18); else AArch64.SystemAccessTrap(EL1, 0x18); else UNDEFINED; elsif PSTATE.EL == EL1 then if EL2Enabled() && HCR_EL2.TID1 == '1' then AArch64.SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && (!HaveEL(EL3) || SCR_EL3.FGTEn == '1') && HFGRTR_EL2.REVIDR_EL1 == '1' then AArch64.SystemAccessTrap(EL2, 0x18); else return REVIDR_EL1; elsif PSTATE.EL == EL2 then return REVIDR_EL1; elsif PSTATE.EL == EL3 then return REVIDR_EL1;




3001/0907/2020 15:0757; ccead0cb9f089f9ceec50268e82aec9e7104721180324f0b9997bede489cc15ad1565345720bcd2a

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