Author: kib
Date: Wed Apr 1 12:31:04 2009
New Revision: 190615
URL: http://svn.freebsd.org/changeset/base/190615
Log:
Provide convenient definition of the union descriptor, similar to the
i386 one. Fully enumerate system segments and gate types.
In collaboration with: pho
Reviewed by: jhb
Modified:
head/sys/amd64/include/segments.h
Modified: head/sys/amd64/include/segments.h
==============================================================================
--- head/sys/amd64/include/segments.h Wed Apr 1 10:58:50 2009
(r190614)
+++ head/sys/amd64/include/segments.h Wed Apr 1 12:31:04 2009
(r190615)
@@ -108,12 +108,29 @@ struct gate_descriptor {
u_int64_t sd_xx1:32;
} __packed;
+/*
+ * Generic descriptor
+ */
+union descriptor {
+ struct user_segment_descriptor sd;
+ struct gate_descriptor gd;
+};
+
/* system segments and gate types */
#define SDT_SYSNULL 0 /* system null */
+#define SDT_SYS286TSS 1 /* system 286 TSS available */
#define SDT_SYSLDT 2 /* system 64 bit local descriptor table
*/
+#define SDT_SYS286BSY 3 /* system 286 TSS busy */
+#define SDT_SYS286CGT 4 /* system 286 call gate */
+#define SDT_SYSTASKGT 5 /* system task gate */
+#define SDT_SYS286IGT 6 /* system 286 interrupt gate */
+#define SDT_SYS286TGT 7 /* system 286 trap gate */
+#define SDT_SYSNULL2 8 /* system null again */
#define SDT_SYSTSS 9 /* system available 64 bit TSS */
+#define SDT_SYSNULL3 10 /* system null again */
#define SDT_SYSBSY 11 /* system busy 64 bit TSS */
#define SDT_SYSCGT 12 /* system 64 bit call gate */
+#define SDT_SYSNULL4 13 /* system null again */
#define SDT_SYSIGT 14 /* system 64 bit interrupt gate */
#define SDT_SYSTGT 15 /* system 64 bit trap gate */
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