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The DBGDTRRX_EL0 characteristics are:
Transfers data from an external debugger to the PE. For example, it is used by a debugger transferring commands and data to a debug target. See DBGDTR_EL0 for additional architectural mappings. It is a component of the Debug Communications Channel.
AArch64 System register DBGDTRRX_EL0 bits [31:0] are architecturally mapped to AArch32 System register DBGDTRRXint[31:0] .
AArch64 System register DBGDTRRX_EL0 bits [31:0] are architecturally mapped to External register DBGDTRRX_EL0[31:0] .
Some or all RW fields of this register have defined reset values.
These apply
only if the PE resets into an Exception level that is using AArch64.
Otherwise,
RW fields in this register reset to architecturally UNKNOWN values.
DBGDTRRX_EL0 is a 64-bit register.
The DBGDTRRX_EL0 bit assignments are:
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 |
RES0 | |||||||||||||||||||||||||||||||
Update DTRRX | |||||||||||||||||||||||||||||||
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 |
Reserved, RES0.
Update DTRRX.
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.
For the full behavior of the Debug Communications Channel, see The Debug Communication Channel and Instruction Transfer Register.
The following resets apply:
On a Cold reset, this field resets to an architecturally UNKNOWN value.
On a Warm reset, the value of this field is unchanged.
Accesses to this register use the following encodings:
op0 | op1 | CRn | CRm | op2 |
---|---|---|---|---|
0b10 | 0b011 | 0b0000 | 0b0101 | 0b000 |
if Halted() then
return DBGDTRRX_EL0;
elsif PSTATE.EL == EL0 then
if !Halted() && !ELUsingAArch32(EL1) && MDSCR_EL1.TDCC == '1' then
if EL2Enabled() && !ELUsingAArch32(EL2) && HCR_EL2.TGE == '1' then
AArch64.SystemAccessTrap(EL2, 0x18);
else
AArch64.SystemAccessTrap(EL1, 0x18);
elsif !Halted() && EL2Enabled() && !ELUsingAArch32(EL2) && MDCR_EL2.TDCC == '1' then
AArch64.SystemAccessTrap(EL2, 0x18);
elsif !Halted() && EL2Enabled() && !ELUsingAArch32(EL2) && (HCR_EL2.TGE == '1' || MDCR_EL2.<TDE,TDA> != '00') then
AArch64.SystemAccessTrap(EL2, 0x18);
elsif !Halted() && HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDCC == '1' then
AArch64.SystemAccessTrap(EL3, 0x18);
elsif !Halted() && HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDA == '1' then
AArch64.SystemAccessTrap(EL3, 0x18);
else
return DBGDTRRX_EL0;
elsif PSTATE.EL == EL1 then
if !Halted() && EL2Enabled() && !ELUsingAArch32(EL2) && MDCR_EL2.TDCC == '1' then
AArch64.SystemAccessTrap(EL2, 0x18);
elsif !Halted() && EL2Enabled() && !ELUsingAArch32(EL2) && MDCR_EL2.<TDE,TDA> != '00' then
AArch64.SystemAccessTrap(EL2, 0x18);
elsif !Halted() && HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDCC == '1' then
AArch64.SystemAccessTrap(EL3, 0x18);
elsif !Halted() && HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDA == '1' then
AArch64.SystemAccessTrap(EL3, 0x18);
else
return DBGDTRRX_EL0;
elsif PSTATE.EL == EL2 then
if !Halted() && HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDCC == '1' then
AArch64.SystemAccessTrap(EL3, 0x18);
elsif !Halted() && HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDA == '1' then
AArch64.SystemAccessTrap(EL3, 0x18);
else
return DBGDTRRX_EL0;
elsif PSTATE.EL == EL3 then
return DBGDTRRX_EL0;
1327/1209/2019 1518:1348; 391b5248b29fb2f001ef74792eaacbd6fc72f2116134483bd14dc8c12a99c984cbfe3431cc1c9707
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