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DBGDCCINT, DCC Interrupt Enable Register

The DBGDCCINT characteristics are:

Purpose

Enables interrupt requests to be signaled based on the DCC status flags.

Configuration

AArch32 System register DBGDCCINT bits [31:0] are architecturally mapped to AArch64 System register MDCCINT_EL1[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 AArch32. Otherwise, RW fields in this register reset to architecturally UNKNOWN values.

Attributes

DBGDCCINT is a 32-bit register.

Field descriptions

The DBGDCCINT bit assignments are:

313029282726252423222120191817161514131211109876543210
RES0RXTXRES0

Bit [31]

Reserved, RES0.

RX, bit [30]

DCC interrupt request enable control for DTRRX. Enables a common COMMIRQ interrupt request to be signaled based on the DCC status flags.

RXMeaning
0b0

No interrupt request generated by DTRRX.

0b1

Interrupt request will be generated on RXfull == 1.

If legacy COMMRX and COMMTX signals are implemented, then these are not affected by the value of this bit.

On a Warm reset, this field resets to 0.

TX, bit [29]

DCC interrupt request enable control for DTRTX. Enables a common COMMIRQ interrupt request to be signaled based on the DCC status flags.

TXMeaning
0b0

No interrupt request generated by DTRTX.

0b1

Interrupt request will be generated on TXfull == 0.

If legacy COMMRX and COMMTX signals are implemented, then these are not affected by the value of this bit.

On a Warm reset, this field resets to 0.

Bits [28:0]

Reserved, RES0.

Accessing the DBGDCCINT

Accesses to this register use the following encodings:

MRC{<c>}{<q>} <coproc>, {#}<opc1>, <Rt>, <CRn>, <CRm>{, {#}<opc2>}

coprocopc1CRnCRmopc2
0b11100b0000b00000b00100b000
if PSTATE.EL == EL0 then
    UNDEFINED;
elsif PSTATE.EL == EL1 then
    if EL2Enabled() && !ELUsingAArch32(EL2) && MDCR_EL2.TDCC == '1' then
        AArch64.AArch32SystemAccessTrap(EL2, 0x05);
    elsif EL2Enabled() && ELUsingAArch32(EL2) && HDCR.TDCC == '1' then
        AArch32.TakeHypTrapException(0x05);
    elsif 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.TDCC == '1' then
        AArch64.AArch32SystemAccessTrap(EL3, 0x05);
    elsif HaveEL(EL3) && ELUsingAArch32(EL3) && SDCR.TDCC == '1' then
        AArch32.TakeMonitorTrapException();
    elsif HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDA == '1' then
        AArch64.AArch32SystemAccessTrap(EL3, 0x05);
    else
        return DBGDCCINT;
elsif PSTATE.EL == EL2 then
    if HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDCC == '1' then
        AArch64.AArch32SystemAccessTrap(EL3, 0x05);
    elsif HaveEL(EL3) && ELUsingAArch32(EL3) && SDCR.TDCC == '1' then
        AArch32.TakeMonitorTrapException();
    elsif HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDA == '1' then
        AArch64.AArch32SystemAccessTrap(EL3, 0x05);
    else
        return DBGDCCINT;
elsif PSTATE.EL == EL3 then
    if PSTATE.M != M32_Monitor && SDCR.TDCC == '1' then
        AArch32.TakeMonitorTrapException();
    else
        return DBGDCCINT;

MCR{<c>}{<q>} <coproc>, {#}<opc1>, <Rt>, <CRn>, <CRm>{, {#}<opc2>}

coprocopc1CRnCRmopc2
0b11100b0000b00000b00100b000
if PSTATE.EL == EL0 then
    UNDEFINED;
elsif PSTATE.EL == EL1 then
    if EL2Enabled() && !ELUsingAArch32(EL2) && MDCR_EL2.TDCC == '1' then
        AArch64.AArch32SystemAccessTrap(EL2, 0x05);
    elsif EL2Enabled() && ELUsingAArch32(EL2) && HDCR.TDCC == '1' then
        AArch32.TakeHypTrapException(0x05);
    elsif 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.TDCC == '1' then
        AArch64.AArch32SystemAccessTrap(EL3, 0x05);
    elsif HaveEL(EL3) && ELUsingAArch32(EL3) && SDCR.TDCC == '1' then
        AArch32.TakeMonitorTrapException();
    elsif HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDA == '1' then
        AArch64.AArch32SystemAccessTrap(EL3, 0x05);
    else
        DBGDCCINT = R[t];
elsif PSTATE.EL == EL2 then
    if HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDCC == '1' then
        AArch64.AArch32SystemAccessTrap(EL3, 0x05);
    elsif HaveEL(EL3) && ELUsingAArch32(EL3) && SDCR.TDCC == '1' then
        AArch32.TakeMonitorTrapException();
    elsif HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDA == '1' then
        AArch64.AArch32SystemAccessTrap(EL3, 0x05);
    else
        DBGDCCINT = R[t];
elsif PSTATE.EL == EL3 then
    if PSTATE.M != M32_Monitor && SDCR.TDCC == '1' then
        AArch32.TakeMonitorTrapException();
    else
        DBGDCCINT = R[t];


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