The REVIDR characteristics are:
Provides implementation-specific minor revision information.
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. Otherwise, direct accesses to REVIDR are UNDEFINED.
If REVIDR has the same value as MIDR, then its contents have no significance.
REVIDR is a 32-bit register.
31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
IMPLEMENTATION DEFINED |
IMPLEMENTATION DEFINED.
Accesses to this register use the following encodings in the System register encoding space:
coproc | opc1 | CRn | CRm | opc2 |
---|---|---|---|---|
0b1111 | 0b000 | 0b0000 | 0b0000 | 0b110 |
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;
20/09/2021 12:37; d4a233ffbdfb36e47856c443a7ce9a85f5e501ca
Copyright © 2010-2021 Arm Limited or its affiliates. All rights reserved. This document is Non-Confidential.