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] .
This register is in the Warm reset domain. Some or all RW fields of this register have defined reset values. On a Warm or Cold reset these apply only if the PE resets into an Exception level that is using AArch32. Otherwise, on a Warm or Cold reset RW fields in this register reset to architecturally 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];
27/03/2019 21:59; e5e4db499bf9867a4b93324c4dbac985d3da9376
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