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DBGWFAR, Debug Watchpoint Fault Address Register
The DBGWFAR characteristics are:
Purpose
Previously returned information about the address of the instruction that accessed a watchpointed address. Is now deprecated and RES0.
Configuration
Attributes
DBGWFAR is a 32-bit register.
Field descriptions
The DBGWFAR 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 | |||||||||||||||||||||||||||||||
Bits [31:0]
Reserved, RES0.
Accessing the DBGWFAR
Accesses to this register use the following encodings:
MRC{<c>}{<q>} <coproc>, {#}<opc1>, <Rt>, <CRn>, <CRm>{, {#}<opc2>}
| coproc | opc1 | CRn | CRm | opc2 |
|---|---|---|---|---|
| 0b1110 | 0b000 | 0b0000 | 0b0110 | 0b000 |
if PSTATE.EL == EL0 then
UNDEFINED;
elsif PSTATE.EL == EL1 then
if EL2Enabled() && !ELUsingAArch32(EL2) && MDCR_EL2.<TDE,TDA> != '00' then
AArch64.AArch32SystemAccessTrap(EL2, 0x05);
elsif EL2Enabled() && ELUsingAArch32(EL2) && HDCR.<TDE,TDA> != '00' then
AArch32.TakeHypTrapException(0x05);
elsif HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDA == '1' then
AArch64.AArch32SystemAccessTrap(EL3, 0x05);
else
return DBGWFAR;
elsif PSTATE.EL == EL2 then
if HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDA == '1' then
AArch64.AArch32SystemAccessTrap(EL3, 0x05);
else
return DBGWFAR;
elsif PSTATE.EL == EL3 then
return DBGWFAR;
MCR{<c>}{<q>} <coproc>, {#}<opc1>, <Rt>, <CRn>, <CRm>{, {#}<opc2>}
| coproc | opc1 | CRn | CRm | opc2 |
|---|---|---|---|---|
| 0b1110 | 0b000 | 0b0000 | 0b0110 | 0b000 |
if PSTATE.EL == EL0 then
UNDEFINED;
elsif PSTATE.EL == EL1 then
if EL2Enabled() && !ELUsingAArch32(EL2) && MDCR_EL2.<TDE,TDA> != '00' then
AArch64.AArch32SystemAccessTrap(EL2, 0x05);
elsif EL2Enabled() && ELUsingAArch32(EL2) && HDCR.<TDE,TDA> != '00' then
AArch32.TakeHypTrapException(0x05);
elsif HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDA == '1' then
AArch64.AArch32SystemAccessTrap(EL3, 0x05);
else
DBGWFAR = R[t];
elsif PSTATE.EL == EL2 then
if HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDA == '1' then
AArch64.AArch32SystemAccessTrap(EL3, 0x05);
else
DBGWFAR = R[t];
elsif PSTATE.EL == EL3 then
DBGWFAR = R[t];