X86: Reorganize segmentation and implement segment selector movs.

--HG--
extra : convert_revision : 553c3ffeda1f5312cf02493f602e7d4ba2fe66e8

1 files changed, 9 insertions, 10 deletions

diff --git a/src/arch/x86/segmentregs.hh b/src/arch/x86/segmentregs.hh
index e6079da6d..7473c5ea9 100644
--- a/src/arch/x86/segmentregs.hh
+++ b/src/arch/x86/segmentregs.hh
@@ -68,19 +68,18 @@ namespace X86ISA
         SEGMENT_REG_DS,
         SEGMENT_REG_FS,
         SEGMENT_REG_GS,
-        SEGMENT_REG_INT,
-
-        NUM_SEGMENTREGS
-    };
-
-    enum SysSegmentRegIndex
-    {
-        SYS_SEGMENT_REG_LDTR,
+        SEGMENT_REG_HS, // Temporary descriptor
+        SEGMENT_REG_TSL, // Local descriptor table
+        SEGMENT_REG_TSG, // Global descriptor table
+        SEGMENT_REG_LS, // Flat segment
+        SEGMENT_REG_MS, // Emulation memory
+        // These shouldn't be used directly in a load or store since they
+        // are likely accessed in other ways in a real machine. For instance,
+        // they may be loaded into the temporary segment register on demand.
         SYS_SEGMENT_REG_TR,
-        SYS_SEGMENT_REG_GDTR,
         SYS_SEGMENT_REG_IDTR,
 
-        NUM_SYSSEGMENTREGS
+        NUM_SEGMENTREGS
     };
 };