(old) | htmldiff from- | (new) |
The DBGOSDLR characteristics are:
Locks out the external debug interface.
AArch32 System register DBGOSDLR bits [31:0] are architecturally mapped to AArch64 System register OSDLR_EL1[31:0] .
ThisSome or all RW fields of this register ishave presentdefined reset values.
These apply
only
when AArch32if isthe supportedPE atresets anyinto an Exception level.
level that is using AArch32.
Otherwise,
RW directfields accessesin this register reset to DBGOSDLR arearchitecturally UNKNOWN.values.
DBGOSDLR is a 32-bit register.
The DBGOSDLR 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 |
RES0 | DLK |
Reserved, RES0.
OS Double Lock control bit.
DLK | Meaning |
---|---|
0b0 | OS Double Lock unlocked. |
0b1 | OS Double Lock locked, if DBGPRCR.CORENPDRQ (Core no powerdown request) bit is set to 0 and the PE is in Non-debug state. |
On a Warm reset, this field resets to 0.
Reserved, RAZ/WI.
Accesses to this register use the following encodings:
coproc | opc1 | CRn | CRm | opc2 |
---|---|---|---|---|
0b1110 | 0b000 | 0b0001 | 0b0011 | 0b100 |
if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EL2Enabled() && !ELUsingAArch32(EL2) && MDCR_EL2.<TDE,TDOSA> != '00' && (IsFeatureImplemented("ARMv8.0-DoubleLock") || boolean IMPLEMENTATION_DEFINED "Trapped by MDCR_EL2.TDOSA") then AArch64.AArch32SystemAccessTrap(EL2, 0x05); elsif EL2Enabled() && ELUsingAArch32(EL2) && HDCR.<TDE,TDOSA> != '00' && (IsFeatureImplemented("ARMv8.0-DoubleLock") || boolean IMPLEMENTATION_DEFINED "Trapped by HDCR.TDOSA") then AArch32.TakeHypTrapException(0x05); elsif HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDOSA == '1' && (IsFeatureImplemented("ARMv8.0-DoubleLock") || boolean IMPLEMENTATION_DEFINED "Trapped by MDCR_EL3.TDOSA") then AArch64.AArch32SystemAccessTrap(EL3, 0x05); else return DBGOSDLR; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDOSA == '1' && (IsFeatureImplemented("ARMv8.0-DoubleLock") || boolean IMPLEMENTATION_DEFINED "Trapped by MDCR_EL3.TDOSA") then AArch64.AArch32SystemAccessTrap(EL3, 0x05); else return DBGOSDLR; elsif PSTATE.EL == EL3 then return DBGOSDLR;
coproc | opc1 | CRn | CRm | opc2 |
---|---|---|---|---|
0b1110 | 0b000 | 0b0001 | 0b0011 | 0b100 |
if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EL2Enabled() && !ELUsingAArch32(EL2) && MDCR_EL2.<TDE,TDOSA> != '00' && (IsFeatureImplemented("ARMv8.0-DoubleLock") || boolean IMPLEMENTATION_DEFINED "Trapped by MDCR_EL2.TDOSA") then AArch64.AArch32SystemAccessTrap(EL2, 0x05); elsif EL2Enabled() && ELUsingAArch32(EL2) && HDCR.<TDE,TDOSA> != '00' && (IsFeatureImplemented("ARMv8.0-DoubleLock") || boolean IMPLEMENTATION_DEFINED "Trapped by HDCR.TDOSA") then AArch32.TakeHypTrapException(0x05); elsif HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDOSA == '1' && (IsFeatureImplemented("ARMv8.0-DoubleLock") || boolean IMPLEMENTATION_DEFINED "Trapped by MDCR_EL3.TDOSA") then AArch64.AArch32SystemAccessTrap(EL3, 0x05); else DBGOSDLR = R[t]; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDOSA == '1' && (IsFeatureImplemented("ARMv8.0-DoubleLock") || boolean IMPLEMENTATION_DEFINED "Trapped by MDCR_EL3.TDOSA") then AArch64.AArch32SystemAccessTrap(EL3, 0x05); else DBGOSDLR = R[t]; elsif PSTATE.EL == EL3 then DBGOSDLR = R[t];
1327/1209/2019 1518:1348; 391b5248b29fb2f001ef74792eaacbd6fc72f2116134483bd14dc8c12a99c984cbfe3431cc1c9707
Copyright © 2010-2019 Arm Limited or its affiliates. All rights reserved. This document is Non-Confidential.
(old) | htmldiff from- | (new) |