From 474bf4782c1bed4568b18c66bdff57454916d8ff Mon Sep 17 00:00:00 2001
From: Giovanni Bajo <rasky@develer.com>
Date: Sun, 29 May 2022 01:02:19 +0200
Subject: [PATCH] vr4300: implement DADE exception.

Very likely to be wrong in details, but still better than an abort.
---
 vr4300/fault.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/vr4300/fault.c b/vr4300/fault.c
index 7fc8f65..8eff8b3 100644
--- a/vr4300/fault.c
+++ b/vr4300/fault.c
@@ -223,7 +223,14 @@ void VR4300_CPU(struct vr4300 *vr4300) {
 
 // DADE: Data address error exception.
 void VR4300_DADE(struct vr4300 *vr4300) {
-  abort(); // Hammertime!
+  struct vr4300_latch *common = &vr4300->pipeline.exdc_latch.common;
+  uint32_t cause, status;
+  uint64_t epc;
+
+  vr4300_ex_fault(vr4300, VR4300_FAULT_CPU);
+  vr4300_exception_prolog(vr4300, common, &cause, &status, &epc);
+  vr4300_exception_epilogue(vr4300, (cause & ~0xFF) | (1 << 28) | 0x10,
+    status, epc, 0x180);
 }
 
 // DCB: Data cache busy interlock.