Changeset 38320 in vbox for trunk/src/recompiler/VBoxRecompiler.c

Timestamp:

Aug 4, 2011 7:16:53 PM (14 years ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

73336

Message:

Redid the A20 gate assertion fix - the recompiler needs to be told.

File:

• trunk/src/recompiler/VBoxRecompiler.c (modified) (1 diff)

trunk/src/recompiler/VBoxRecompiler.c

@@ -2952 +2952 @@
 #undef LOG_GROUP
 #define LOG_GROUP LOG_GROUP_REM
+
+
+/**
+ * Notify the recompiler about Address Gate 20 state change.
+ *
+ * This notification is required since A20 gate changes are
+ * initialized from a device driver and the VM might just as
+ * well be in REM mode as in RAW mode.
+ *
+ * @param   pVM         VM handle.
+ * @param   pVCpu       VMCPU handle.
+ * @param   fEnable     True if the gate should be enabled.
+ *                      False if the gate should be disabled.
+ */
+REMR3DECL(void) REMR3A20Set(PVM pVM, PVMCPU pVCpu, bool fEnable)
+{
+    LogFlow(("REMR3A20Set: fEnable=%d\n", fEnable));
+    VM_ASSERT_EMT(pVM);
+
+    /** @todo SMP and the A20 gate... */
+    if (pVM->rem.s.Env.pVCpu == pVCpu)
+    {
+        ASMAtomicIncU32(&pVM->rem.s.cIgnoreAll);
+        cpu_x86_set_a20(&pVM->rem.s.Env, fEnable);
+        ASMAtomicDecU32(&pVM->rem.s.cIgnoreAll);
+    }
+}