Transfers 64 bits of data between the PE and an external debugger. Can transfer both ways using only a single register.
AArch64 System register DBGDTR_EL0 bits [63:32] are architecturally mapped to AArch32 System register DBGDTRRXint[31:0] when written.
AArch64 System register DBGDTR_EL0 bits [63:32] are architecturally mapped to External register DBGDTRRX_EL0[31:0] when written.
AArch64 System register DBGDTR_EL0 bits [63:32] are architecturally mapped to AArch64 System register DBGDTRRX_EL0[31:0] when written.
AArch64 System register DBGDTR_EL0 bits [31:0] are architecturally mapped to AArch32 System register DBGDTRTXint[31:0] when written.
AArch64 System register DBGDTR_EL0 bits [31:0] are architecturally mapped to External register DBGDTRTX_EL0[31:0] when written.
AArch64 System register DBGDTR_EL0 bits [31:0] are architecturally mapped to AArch64 System register DBGDTRTX_EL0[31:0] when written.
AArch64 System register DBGDTR_EL0 bits [63:32] are architecturally mapped to AArch32 System register DBGDTRTXint[31:0] when read.
AArch64 System register DBGDTR_EL0 bits [63:32] are architecturally mapped to External register DBGDTRTX_EL0[31:0] when read.
AArch64 System register DBGDTR_EL0 bits [63:32] are architecturally mapped to AArch64 System register DBGDTRTX_EL0[31:0] when read.
AArch64 System register DBGDTR_EL0 bits [31:0] are architecturally mapped to AArch32 System register DBGDTRRXint[31:0] when read.
AArch64 System register DBGDTR_EL0 bits [31:0] are architecturally mapped to External register DBGDTRRX_EL0[31:0] when read.
AArch64 System register DBGDTR_EL0 bits [31:0] are architecturally mapped to AArch64 System register DBGDTRRX_EL0[31:0] when read.
DBGDTR_EL0 is a 64-bit register.
| 63 | 62 | 61 | 60 | 59 | 58 | 57 | 56 | 55 | 54 | 53 | 52 | 51 | 50 | 49 | 48 | 47 | 46 | 45 | 44 | 43 | 42 | 41 | 40 | 39 | 38 | 37 | 36 | 35 | 34 | 33 | 32 |
| 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 |
| HighWord | |||||||||||||||||||||||||||||||
| LowWord | |||||||||||||||||||||||||||||||
Writes to this register set DTRRX to the value in this field and do not change RXfull.
Reads of this register:
If RXfull is set to 1, return the last value written to DTRTX.
If RXfull is set to 0, return an UNKNOWN value.
After the read, RXfull is cleared to 0.
Writes to this register set DTRTX to the value in this field and set TXfull to 1.
Reads of this register:
If RXfull is set to 1, return the last value written to DTRRX.
If RXfull is set to 0, return an UNKNOWN value.
After the read, RXfull is cleared to 0.
Accesses to this register use the following encodings in the System register encoding space:
MRS <Xt>, DBGDTR_EL0
| op0 | op1 | CRn | CRm | op2 |
|---|---|---|---|---|
| 0b10 | 0b011 | 0b0000 | 0b0100 | 0b000 |
if Halted() then X[t, 64] = Read_DBGDTR_EL0(64); elsif PSTATE.EL == EL0 then if MDSCR_EL1.TDCC == '1' then if EL2Enabled() && HCR_EL2.TGE == '1' then AArch64.SystemAccessTrap(EL2, 0x18); else AArch64.SystemAccessTrap(EL1, 0x18); elsif EL2Enabled() && MDCR_EL2.TDCC == '1' then AArch64.SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && (HCR_EL2.TGE == '1' || MDCR_EL2.<TDE,TDA> != '00') then AArch64.SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && MDCR_EL3.TDCC == '1' then AArch64.SystemAccessTrap(EL3, 0x18); elsif HaveEL(EL3) && MDCR_EL3.TDA == '1' then AArch64.SystemAccessTrap(EL3, 0x18); else X[t, 64] = Read_DBGDTR_EL0(64); elsif PSTATE.EL == EL1 then if EL2Enabled() && MDCR_EL2.TDCC == '1' then AArch64.SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && MDCR_EL2.<TDE,TDA> != '00' then AArch64.SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && MDCR_EL3.TDCC == '1' then AArch64.SystemAccessTrap(EL3, 0x18); elsif HaveEL(EL3) && MDCR_EL3.TDA == '1' then AArch64.SystemAccessTrap(EL3, 0x18); else X[t, 64] = Read_DBGDTR_EL0(64); elsif PSTATE.EL == EL2 then if HaveEL(EL3) && MDCR_EL3.TDCC == '1' then AArch64.SystemAccessTrap(EL3, 0x18); elsif HaveEL(EL3) && MDCR_EL3.TDA == '1' then AArch64.SystemAccessTrap(EL3, 0x18); else X[t, 64] = Read_DBGDTR_EL0(64); elsif PSTATE.EL == EL3 then X[t, 64] = Read_DBGDTR_EL0(64);
MSR DBGDTR_EL0, <Xt>
| op0 | op1 | CRn | CRm | op2 |
|---|---|---|---|---|
| 0b10 | 0b011 | 0b0000 | 0b0100 | 0b000 |
if Halted() then Write_DBGDTR_EL0(X[t, 64]); elsif PSTATE.EL == EL0 then if MDSCR_EL1.TDCC == '1' then if EL2Enabled() && HCR_EL2.TGE == '1' then AArch64.SystemAccessTrap(EL2, 0x18); else AArch64.SystemAccessTrap(EL1, 0x18); elsif EL2Enabled() && MDCR_EL2.TDCC == '1' then AArch64.SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && (HCR_EL2.TGE == '1' || MDCR_EL2.<TDE,TDA> != '00') then AArch64.SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && MDCR_EL3.TDCC == '1' then AArch64.SystemAccessTrap(EL3, 0x18); elsif HaveEL(EL3) && MDCR_EL3.TDA == '1' then AArch64.SystemAccessTrap(EL3, 0x18); else Write_DBGDTR_EL0(X[t, 64]); elsif PSTATE.EL == EL1 then if EL2Enabled() && MDCR_EL2.TDCC == '1' then AArch64.SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && MDCR_EL2.<TDE,TDA> != '00' then AArch64.SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && MDCR_EL3.TDCC == '1' then AArch64.SystemAccessTrap(EL3, 0x18); elsif HaveEL(EL3) && MDCR_EL3.TDA == '1' then AArch64.SystemAccessTrap(EL3, 0x18); else Write_DBGDTR_EL0(X[t, 64]); elsif PSTATE.EL == EL2 then if HaveEL(EL3) && MDCR_EL3.TDCC == '1' then AArch64.SystemAccessTrap(EL3, 0x18); elsif HaveEL(EL3) && MDCR_EL3.TDA == '1' then AArch64.SystemAccessTrap(EL3, 0x18); else Write_DBGDTR_EL0(X[t, 64]); elsif PSTATE.EL == EL3 then Write_DBGDTR_EL0(X[t, 64]);