The HDFAR characteristics are:
Holds the virtual address of the faulting address that caused a synchronous Data Abort exception that is taken to Hyp mode.
AArch32 System register HDFAR bits [31:0] are architecturally mapped to AArch64 System register FAR_EL2[31:0] .
AArch32 System register HDFAR bits [31:0] are architecturally mapped to AArch32 System register DFAR[31:0] (S) when HaveEL(EL2).
If EL2 is not implemented, this register is RES0 from EL3.
RW fields in this register reset to architecturally UNKNOWN values.
HDFAR is a 32-bit register.
The HDFAR 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 |
VA of faulting address of synchronous Data Abort exception taken to Hyp mode |
VA of faulting address of synchronous Data Abort exception taken to Hyp mode.
On a Prefetch Abort exception, this register is UNKNOWN.
Any execution in a Non-secure EL1 or Non-secure EL0 mode makes this register UNKNOWN.
This field resets to an architecturally UNKNOWN value.
Accesses to this register use the following encodings:
opc1 | opc2 | CRn | coproc | CRm |
---|---|---|---|---|
0b100 | 0b000 | 0b0110 | 0b1111 | 0b0000 |
if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EL2Enabled() && !ELUsingAArch32(EL2) && HSTR_EL2.T6 == '1' then AArch64.AArch32SystemAccessTrap(EL2, 0x03); elsif EL2Enabled() && ELUsingAArch32(EL2) && HSTR.T6 == '1' then AArch32.TakeHypTrapException(0x03); else UNDEFINED; elsif PSTATE.EL == EL2 then return HDFAR; elsif PSTATE.EL == EL3 then if SCR.NS == '0' then UNDEFINED; else return HDFAR;
opc1 | opc2 | CRn | coproc | CRm |
---|---|---|---|---|
0b100 | 0b000 | 0b0110 | 0b1111 | 0b0000 |
if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EL2Enabled() && !ELUsingAArch32(EL2) && HSTR_EL2.T6 == '1' then AArch64.AArch32SystemAccessTrap(EL2, 0x03); elsif EL2Enabled() && ELUsingAArch32(EL2) && HSTR.T6 == '1' then AArch32.TakeHypTrapException(0x03); else UNDEFINED; elsif PSTATE.EL == EL2 then HDFAR = R[t]; elsif PSTATE.EL == EL3 then if SCR.NS == '0' then UNDEFINED; else HDFAR = R[t];
13/12/2018 16:42; 6379d01c197f1d40720d32d0f84c419c9187c009
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