REVIDR, Revision ID Register

The REVIDR characteristics are:

Purpose

Provides implementation-specific minor revision information.

Configuration

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

This register is present only when AArch32 is supported at any Exception level. Otherwise, direct accesses to REVIDR are UNDEFINED.

If REVIDR has the same value as MIDR, then its contents have no significance.

Attributes

REVIDR is a 32-bit register.

Field descriptions

The REVIDR bit assignments are:

313029282726252423222120191817161514131211109876543210
IMPLEMENTATION DEFINED

IMPLEMENTATION DEFINED, bits [31:0]

IMPLEMENTATION DEFINED.

Accessing the REVIDR

Accesses to this register use the following encodings:

MRC{<c>}{<q>} <coproc>, {#}<opc1>, <Rt>, <CRn>, <CRm>{, {#}<opc2>}

coprocopc1CRnCRmopc2
0b11110b0000b00000b00000b110

if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EL2Enabled() && !ELUsingAArch32(EL2) && HSTR_EL2.T0 == '1' then AArch64.AArch32SystemAccessTrap(EL2, 0x03); elsif EL2Enabled() && ELUsingAArch32(EL2) && HSTR.T0 == '1' then AArch32.TakeHypTrapException(0x03); elsif EL2Enabled() && !ELUsingAArch32(EL2) && HCR_EL2.TID1 == '1' then AArch64.AArch32SystemAccessTrap(EL2, 0x03); elsif EL2Enabled() && ELUsingAArch32(EL2) && HCR.TID1 == '1' then AArch32.TakeHypTrapException(0x03); else return REVIDR; elsif PSTATE.EL == EL2 then return REVIDR; elsif PSTATE.EL == EL3 then return REVIDR;


30/03/2021 20:51; e3551d56dc294a4d55296a6c10544191ada08a8e

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