svn commit: r306402 - stable/11/sys/amd64/include

[Konstantin Belousov]

Author: kib
Date: Wed Sep 28 09:43:23 2016
New Revision: 306402
URL: https://svnweb.freebsd.org/changeset/base/306402

Log:
  MFC r306088:
  Add amd64 functions to load/store GDT register, store IDT and TR registers.

Modified:
  stable/11/sys/amd64/include/cpufunc.h
Directory Properties:
  stable/11/   (props changed)

Modified: stable/11/sys/amd64/include/cpufunc.h
==============================================================================
--- stable/11/sys/amd64/include/cpufunc.h	Wed Sep 28 09:41:00 2016	(r306401)
+++ stable/11/sys/amd64/include/cpufunc.h	Wed Sep 28 09:43:23 2016	(r306402)
@@ -645,12 +645,36 @@ load_gs(u_short sel)
 #endif
 
 static __inline void
+bare_lgdt(struct region_descriptor *addr)
+{
+	__asm __volatile("lgdt (%0)" : : "r" (addr));
+}
+
+static __inline void
+sgdt(struct region_descriptor *addr)
+{
+	char *loc;
+
+	loc = (char *)addr;
+	__asm __volatile("sgdt %0" : "=m" (*loc) : : "memory");
+}
+
+static __inline void
 lidt(struct region_descriptor *addr)
 {
 	__asm __volatile("lidt (%0)" : : "r" (addr));
 }
 
 static __inline void
+sidt(struct region_descriptor *addr)
+{
+	char *loc;
+
+	loc = (char *)addr;
+	__asm __volatile("sidt %0" : "=m" (*loc) : : "memory");
+}
+
+static __inline void
 lldt(u_short sel)
 {
 	__asm __volatile("lldt %0" : : "r" (sel));
@@ -662,6 +686,15 @@ ltr(u_short sel)
 	__asm __volatile("ltr %0" : : "r" (sel));
 }
 
+static __inline uint32_t
+read_tr(void)
+{
+	u_short sel;
+
+	__asm __volatile("str %0" : "=r" (sel));
+	return (sel);
+}
+
 static __inline uint64_t
 rdr0(void)
 {