You copied the Doc URL to your clipboard.

ICV_DIR_EL1, Interrupt Controller Deactivate Virtual Interrupt Register

The ICV_DIR_EL1 characteristics are:

Purpose

When interrupt priority drop is separated from interrupt deactivation, a write to this register deactivates the specified virtual interrupt.

Configuration

AArch64 System register ICV_DIR_EL1 bits [31:0] performs the same function as AArch32 System register ICV_DIR[31:0] .

Attributes

ICV_DIR_EL1 is a 64-bit register.

Field descriptions

The ICV_DIR_EL1 bit assignments are:

6362616059585756555453525150494847464544434241403938373635343332
00000000000000000000000000000000
00000000INTID
313029282726252423222120191817161514131211109876543210

Bits [63:24]

Reserved, RES0.

INTID, bits [23:0]

The INTID of the virtual interrupt to be deactivated.

This field has either 16 or 24 bits implemented. The number of implemented bits can be found in ICV_CTLR_EL1.IDbits. If only 16 bits are implemented, bits [23:16] of this register are RES0.

Accessing the ICV_DIR_EL1

When EOImode == 0, writes are ignored. In systems supporting system error generation, an implementation might generate an SEI.

Accesses to this register use the following encodings:

MSR ICC_DIR_EL1, <Xt>

op0CRnop1op2CRm
0b110b11000b0000b0010b1011
if PSTATE.EL == EL0 then
    UNDEFINED;
elsif PSTATE.EL == EL1 then
    if ICC_SRE_EL1.SRE == '0' then
        AArch64.SystemAccessTrap(EL1, 0x18);
    elsif EL2Enabled() && !ELUsingAArch32(EL2) && ICH_HCR_EL2.TDIR == '1' then
        AArch64.SystemAccessTrap(EL2, 0x18);
    elsif EL2Enabled() && !ELUsingAArch32(EL2) && ICH_HCR_EL2.TC == '1' then
        AArch64.SystemAccessTrap(EL2, 0x18);
    elsif EL2Enabled() && !ELUsingAArch32(EL2) && HCR_EL2.FMO == '1' then
        ICV_DIR_EL1 = X[t];
    elsif EL2Enabled() && !ELUsingAArch32(EL2) && HCR_EL2.IMO == '1' then
        ICV_DIR_EL1 = X[t];
    elsif HaveEL(EL3) && !ELUsingAArch32(EL3) && SCR_EL3.<IRQ,FIQ> == '11' then
        AArch64.SystemAccessTrap(EL3, 0x18);
    else
        ICC_DIR_EL1 = X[t];
elsif PSTATE.EL == EL2 then
    if ICC_SRE_EL2.SRE == '0' then
        AArch64.SystemAccessTrap(EL2, 0x18);
    elsif HaveEL(EL3) && !ELUsingAArch32(EL3) && SCR_EL3.<IRQ,FIQ> == '11' then
        AArch64.SystemAccessTrap(EL3, 0x18);
    else
        ICC_DIR_EL1 = X[t];
elsif PSTATE.EL == EL3 then
    if ICC_SRE_EL3.SRE == '0' then
        AArch64.SystemAccessTrap(EL3, 0x18);
    else
        ICC_DIR_EL1 = X[t];
              


Was this page helpful? Yes No