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authorluoqi <luoqi@FreeBSD.org>1999-04-28 01:04:33 +0000
committerluoqi <luoqi@FreeBSD.org>1999-04-28 01:04:33 +0000
commitaf7e9be5cce9a2ceb819f00b3f58014d23ab57cd (patch)
tree0e70c0e764f072d43041acca8ac52e30616dced3 /sys/amd64/include/tss.h
parent0f4a245030e7f1acb03f8de0822a58b188fc0d28 (diff)
downloadFreeBSD-src-af7e9be5cce9a2ceb819f00b3f58014d23ab57cd.zip
FreeBSD-src-af7e9be5cce9a2ceb819f00b3f58014d23ab57cd.tar.gz
Enable vmspace sharing on SMP. Major changes are,
- %fs register is added to trapframe and saved/restored upon kernel entry/exit. - Per-cpu pages are no longer mapped at the same virtual address. - Each cpu now has a separate gdt selector table. A new segment selector is added to point to per-cpu pages, per-cpu global variables are now accessed through this new selector (%fs). The selectors in gdt table are rearranged for cache line optimization. - fask_vfork is now on as default for both UP and SMP. - Some aio code cleanup. Reviewed by: Alan Cox <alc@cs.rice.edu> John Dyson <dyson@iquest.net> Julian Elischer <julian@whistel.com> Bruce Evans <bde@zeta.org.au> David Greenman <dg@root.com>
Diffstat (limited to 'sys/amd64/include/tss.h')
-rw-r--r--sys/amd64/include/tss.h11
1 files changed, 10 insertions, 1 deletions
diff --git a/sys/amd64/include/tss.h b/sys/amd64/include/tss.h
index 565defa..636133a 100644
--- a/sys/amd64/include/tss.h
+++ b/sys/amd64/include/tss.h
@@ -34,12 +34,14 @@
* SUCH DAMAGE.
*
* from: @(#)tss.h 5.4 (Berkeley) 1/18/91
- * $Id$
+ * $Id: tss.h,v 1.8 1997/02/22 09:35:20 peter Exp $
*/
#ifndef _MACHINE_TSS_H_
#define _MACHINE_TSS_H_ 1
+#include <machine/globals.h>
+
/*
* Intel 386 Context Data Type
*/
@@ -79,4 +81,11 @@ struct i386tss {
int tss_ioopt; /* options & io offset bitmap: currently zero */
/* XXX unimplemented .. i/o permission bitmap */
};
+
+#ifdef KERNEL
+#ifndef common_tss
+extern struct i386tss common_tss;
+#endif
+#endif
+
#endif /* _MACHINE_TSS_H_ */
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