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Mask off trap entry assertion from IRQs when in debug mode. Because the IRQ is level-sensitive, this caused trap entry to be held asserted when an IRQ fired in debug mode. This was exposed by the last bug fix -- it is only seen now that MIE+MPIE shuffling is correctly disabled in debug mode.

This commit is contained in:
Luke Wren 2021-07-19 00:19:56 +01:00
parent 70443fa557
commit 65fb62901e
1 changed files with 1 additions and 1 deletions

2
hdl/hazard3_csr.v
View File

@ -1018,7 +1018,7 @@ assign trap_is_irq = DEBUG_SUPPORT && (want_halt_except || want_halt_irq) ?
assign trap_enter_vld =
CSR_M_TRAP && (exception_req_any ||
!delay_irq_entry && (standard_irq_active || external_irq_active)) ||
!delay_irq_entry && !debug_mode && (standard_irq_active || external_irq_active)) ||
DEBUG_SUPPORT && (want_halt_irq || want_halt_except || pending_dbg_resume);
assign mcause_irq_next = !exception_req_any;