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[rtl] Don't take interrupts when single stepping #97

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Mar 3, 2023
Merged

[rtl] Don't take interrupts when single stepping #97

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3 changes: 2 additions & 1 deletion rtl/cve2_controller.sv
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Original file line number Diff line number Diff line change
Expand Up @@ -343,7 +343,8 @@ module cve2_controller #(
// - while in debug mode [Debug Spec v0.13.2, p.39],
// - while in NMI mode (nested NMIs are not supported, NMI has highest priority and
// cannot be interrupted by regular interrupts).
assign handle_irq = ~debug_mode_q & ~nmi_mode_q &
// - while single stepping.
assign handle_irq = ~debug_mode_q & ~debug_single_step_i & ~nmi_mode_q &
(irq_nm_i | (irq_pending_i & csr_mstatus_mie_i));

// generate ID of fast interrupts, highest priority to lowest ID
Expand Down