You copied the Doc URL to your clipboard.

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] .

This register is present only when AArch32 is supported at any Exception level. Otherwise, direct accesses to DBGDCCINT are UNKNOWN.

Attributes

DBGDCCINT is a 32-bit register.

Field descriptions

The DBGDCCINT 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	RX	TX	RES0

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.

RX	Meaning
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.

TX	Meaning
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>}

coproc	opc1	CRn	CRm	opc2
0b1110	0b000	0b0000	0b0010	0b000

if PSTATE.EL == EL0 then
    UNDEFINED;
elsif PSTATE.EL == EL1 then
    if Halted() && HaveEL(EL3) && EDSCR.SDD == '1' && boolean IMPLEMENTATION_DEFINED "EL3 trap priority when SDD == '1'" && !ELUsingAArch32(EL3) && MDCR_EL3.TDCC == '1' then
        UNDEFINED;
    elsif Halted() && HaveEL(EL3) && EDSCR.SDD == '1' && boolean IMPLEMENTATION_DEFINED "EL3 trap priority when SDD == '1'" && ELUsingAArch32(EL3) && SDCR.TDCC == '1' then
        UNDEFINED;
    elsif Halted() && HaveEL(EL3) && EDSCR.SDD == '1' && boolean IMPLEMENTATION_DEFINED "EL3 trap priority when SDD == '1'" && !ELUsingAArch32(EL3) && MDCR_EL3.TDA == '1' then
        UNDEFINED;
    elsif 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
        if Halted() && EDSCR.SDD == '1' then
            UNDEFINED;
        else
            AArch64.AArch32SystemAccessTrap(EL3, 0x05);
    elsif HaveEL(EL3) && ELUsingAArch32(EL3) && SDCR.TDCC == '1' then
        if Halted() && EDSCR.SDD == '1' then
            UNDEFINED;
        else
            AArch32.TakeMonitorTrapException();
    elsif HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDA == '1' then
        if Halted() && EDSCR.SDD == '1' then
            UNDEFINED;
        else
            AArch64.AArch32SystemAccessTrap(EL3, 0x05);
    else
        return DBGDCCINT;
elsif PSTATE.EL == EL2 then
    if Halted() && HaveEL(EL3) && EDSCR.SDD == '1' && boolean IMPLEMENTATION_DEFINED "EL3 trap priority when SDD == '1'" && !ELUsingAArch32(EL3) && MDCR_EL3.TDCC == '1' then
        UNDEFINED;
    elsif Halted() && HaveEL(EL3) && EDSCR.SDD == '1' && boolean IMPLEMENTATION_DEFINED "EL3 trap priority when SDD == '1'" && ELUsingAArch32(EL3) && SDCR.TDCC == '1' then
        UNDEFINED;
    elsif Halted() && HaveEL(EL3) && EDSCR.SDD == '1' && boolean IMPLEMENTATION_DEFINED "EL3 trap priority when SDD == '1'" && !ELUsingAArch32(EL3) && MDCR_EL3.TDA == '1' then
        UNDEFINED;
    elsif HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDCC == '1' then
        if Halted() && EDSCR.SDD == '1' then
            UNDEFINED;
        else
            AArch64.AArch32SystemAccessTrap(EL3, 0x05);
    elsif HaveEL(EL3) && ELUsingAArch32(EL3) && SDCR.TDCC == '1' then
        if Halted() && EDSCR.SDD == '1' then
            UNDEFINED;
        else
            AArch32.TakeMonitorTrapException();
    elsif HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDA == '1' then
        if Halted() && EDSCR.SDD == '1' then
            UNDEFINED;
        else
            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>}

coproc	opc1	CRn	CRm	opc2
0b1110	0b000	0b0000	0b0010	0b000

if PSTATE.EL == EL0 then
    UNDEFINED;
elsif PSTATE.EL == EL1 then
    if Halted() && HaveEL(EL3) && EDSCR.SDD == '1' && boolean IMPLEMENTATION_DEFINED "EL3 trap priority when SDD == '1'" && !ELUsingAArch32(EL3) && MDCR_EL3.TDCC == '1' then
        UNDEFINED;
    elsif Halted() && HaveEL(EL3) && EDSCR.SDD == '1' && boolean IMPLEMENTATION_DEFINED "EL3 trap priority when SDD == '1'" && ELUsingAArch32(EL3) && SDCR.TDCC == '1' then
        UNDEFINED;
    elsif Halted() && HaveEL(EL3) && EDSCR.SDD == '1' && boolean IMPLEMENTATION_DEFINED "EL3 trap priority when SDD == '1'" && !ELUsingAArch32(EL3) && MDCR_EL3.TDA == '1' then
        UNDEFINED;
    elsif 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
        if Halted() && EDSCR.SDD == '1' then
            UNDEFINED;
        else
            AArch64.AArch32SystemAccessTrap(EL3, 0x05);
    elsif HaveEL(EL3) && ELUsingAArch32(EL3) && SDCR.TDCC == '1' then
        if Halted() && EDSCR.SDD == '1' then
            UNDEFINED;
        else
            AArch32.TakeMonitorTrapException();
    elsif HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDA == '1' then
        if Halted() && EDSCR.SDD == '1' then
            UNDEFINED;
        else
            AArch64.AArch32SystemAccessTrap(EL3, 0x05);
    else
        DBGDCCINT = R[t];
elsif PSTATE.EL == EL2 then
    if Halted() && HaveEL(EL3) && EDSCR.SDD == '1' && boolean IMPLEMENTATION_DEFINED "EL3 trap priority when SDD == '1'" && !ELUsingAArch32(EL3) && MDCR_EL3.TDCC == '1' then
        UNDEFINED;
    elsif Halted() && HaveEL(EL3) && EDSCR.SDD == '1' && boolean IMPLEMENTATION_DEFINED "EL3 trap priority when SDD == '1'" && ELUsingAArch32(EL3) && SDCR.TDCC == '1' then
        UNDEFINED;
    elsif Halted() && HaveEL(EL3) && EDSCR.SDD == '1' && boolean IMPLEMENTATION_DEFINED "EL3 trap priority when SDD == '1'" && !ELUsingAArch32(EL3) && MDCR_EL3.TDA == '1' then
        UNDEFINED;
    elsif HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDCC == '1' then
        if Halted() && EDSCR.SDD == '1' then
            UNDEFINED;
        else
            AArch64.AArch32SystemAccessTrap(EL3, 0x05);
    elsif HaveEL(EL3) && ELUsingAArch32(EL3) && SDCR.TDCC == '1' then
        if Halted() && EDSCR.SDD == '1' then
            UNDEFINED;
        else
            AArch32.TakeMonitorTrapException();
    elsif HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDA == '1' then
        if Halted() && EDSCR.SDD == '1' then
            UNDEFINED;
        else
            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];

Previous Next

Arm® Architecture Registers Armv8, for Armv8-A architecture profile