a20 fix

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@477 c046a42c-6fe2-441c-8c8c-71466251a162
2003-11-23 23:26:39 +00:00 · 2003-11-23 23:26:39 +00:00 · 6bb705711b
parent 4136f33c7e
commit 6bb705711b
1 changed files with 4 additions and 0 deletions
--- a/target-i386/helper2.c
+++ b/target-i386/helper2.c
@ -190,6 +190,10 @@ void cpu_x86_set_a20(CPUX86State *env, int a20_state)
 {
    a20_state = (a20_state != 0);
    if (a20_state != a20_enabled) {
+        /* if the cpu is currently executing code, we must unlink it and
+           all the potentially executing TB */
+        cpu_interrupt(env, 0);
+
        /* when a20 is changed, all the MMU mappings are invalid, so
           we must flush everything */
        page_unmap();