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a20 fix

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