diff options
| author |   Yang Zhang <yang.z.zhang@intel.com> | 2015-08-28 09:58:54 +0800 |
|---|---|---|
| committer | Yang Zhang <yang.z.zhang@intel.com> | 2015-09-01 12:44:00 +0800 |
| commit | e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch) | |
| tree | 66b09f592c55df2878107a468a91d21506104d3f /qemu/roms/openbios/arch/amd64/segment.h | |
| parent | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff) | |
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/roms/openbios/arch/amd64/segment.h')
| -rw-r--r-- | qemu/roms/openbios/arch/amd64/segment.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/qemu/roms/openbios/arch/amd64/segment.h b/qemu/roms/openbios/arch/amd64/segment.h new file mode 100644 index 000000000..0371a80ae --- /dev/null +++ b/qemu/roms/openbios/arch/amd64/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) |