Initial import of abandoned HQEMU version 2.5.2HEADmaster

1 files changed, 30 insertions, 0 deletions

diff --git a/src/roms/openbios/arch/x86/segment.h b/src/roms/openbios/arch/x86/segment.h
new file mode 100644
index 0000000..0371a80
--- /dev/null
+++ b/src/roms/openbios/arch/x86/segment.h
@@ -0,0 +1,30 @@
+
+/* Segment indexes. Must match the gdt definition in segment.c. */
+enum {
+    NULL_SEG,
+    FLAT_CODE,
+    FLAT_DATA,
+    RELOC_CODE,
+    RELOC_DATA,
+    NUM_SEG,
+};
+
+/* Values for segment selector register */
+#define FLAT_CS (FLAT_CODE << 3)
+#define FLAT_DS (FLAT_DATA << 3)
+#define RELOC_CS (RELOC_CODE << 3)
+#define RELOC_DS (RELOC_DATA << 3)
+
+/* i386 segment descriptor */
+struct segment_desc {
+    unsigned short limit_0;
+    unsigned short base_0;
+    unsigned char base_16;
+    unsigned char types;
+    unsigned char flags;
+    unsigned char base_24;
+};
+
+extern struct segment_desc gdt[NUM_SEG];
+
+#define GDT_LIMIT ((NUM_SEG << 3) - 1)