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 at any Exception level. Otherwise, direct accesses to REVIDR are UNKNOWN.
If REVIDR has the same value as MIDR, then its contents have no significance.
REVIDR is a 32-bit register.
The REVIDR bit assignments are:
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:
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;
13/12/2019 15:13; 391b5248b29fb2f001ef74792eaacbd6fc72f211
Copyright © 2010-2019 Arm Limited or its affiliates. All rights reserved. This document is Non-Confidential.