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AArch32 Debug.Enables Pseudocode

Library pseudocode for aarch32/debug/enables/AArch32.GenerateDebugExceptions

// AArch32.GenerateDebugExceptions()
// =================================

boolean AArch32.GenerateDebugExceptions()
    return AArch32.GenerateDebugExceptionsFrom(PSTATE.EL, IsSecure());

Library pseudocode for aarch32/debug/enables/AArch32.GenerateDebugExceptionsFrom

// AArch32.GenerateDebugExceptionsFrom()
// =====================================

boolean AArch32.GenerateDebugExceptionsFrom(bits(2) from, boolean secure)

    if from == EL0 && (ELIsInHost(from) || !ELStateUsingAArch32(EL1, secure)) then
        mask = bit UNKNOWN;                          // PSTATE.D mask, unused for EL0 case
        return AArch64.GenerateDebugExceptionsFrom(from, secure, mask);

    if DBGOSLSR.OSLK == '1' || DoubleLockStatus() || Halted() then
        return FALSE;

    if HaveEL(EL3) && secure then
        assert from != EL2;    // Secure EL2 always uses AArch64
        if IsSecureEL2Enabled() then
            // Implies that EL3 and EL2 both using AArch64
            enabled = MDCR_EL3.SDD == '0';
        else
            spd = if ELUsingAArch32(EL3) then SDCR.SPD else MDCR_EL3.SPD32;
            if spd<1> == '1' then
                enabled = spd<0> == '1';
            else
                // SPD == 0b01 is reserved, but behaves the same as 0b00.
                enabled = AArch32.SelfHostedSecurePrivilegedInvasiveDebugEnabled();
        if from == EL0 then enabled = enabled || SDER.SUIDEN == '1';
    else
        enabled = from != EL2;

    return enabled;
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