diff options
| author | Stefan Reinauer <stepan@coresystems.de> | 2009-05-29 13:08:27 +0000 |
|---|---|---|
| committer | Stefan Reinauer <stepan@openbios.org> | 2009-05-29 13:08:27 +0000 |
| commit | f8a5c6ec02f1e21d62756bda07f755b3a2f4865f (patch) | |
| tree | 8b3a82e4c402666fe2d4c195f277b30d60b4cc05 /src/arch/i386/lib | |
| parent | 43bc5a9c74c701b2a13dbe603c6983a13db622da (diff) | |
| download | coreboot-f8a5c6ec02f1e21d62756bda07f755b3a2f4865f.tar.xz | |
drop most of the crappy vm86 code and replace it with a rewritten
version that has all assembler in a .S file and all C code in a .c
file. Also, remove requirement to move around between GDTs.
This version includes the suggestions from Peter to clean up CR0 manipulation
and to guard critical code paths by cli/sti. Tested and working on my hardware.
Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Peter Stuge <peter@stuge.se>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4323 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/arch/i386/lib')
| -rw-r--r-- | src/arch/i386/lib/c_start.S | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/src/arch/i386/lib/c_start.S b/src/arch/i386/lib/c_start.S index 3145931e51..d2d8b435bc 100644 --- a/src/arch/i386/lib/c_start.S +++ b/src/arch/i386/lib/c_start.S @@ -253,7 +253,7 @@ gdtaddr: /* This is the gdt for GCC part of coreboot. * It is different from the gdt in ROMCC/ASM part of coreboot - * which is defined in entry32.inc */ + * which is defined in entry32.inc */ /* BUT WHY?? */ gdt: /* selgdt 0, unused */ .word 0x0000, 0x0000 /* dummy */ @@ -275,6 +275,13 @@ gdt: .word 0x0000, 0x0000 /* dummy */ .byte 0x00, 0x00, 0x00, 0x00 + /* selgdt 0x28 16-bit 64k code at 0x00000000 */ + .word 0xffff, 0x0000 + .byte 0, 0x9a, 0, 0 + + /* selgdt 0x30 16-bit 64k data at 0x00000000 */ + .word 0xffff, 0x0000 + .byte 0, 0x92, 0, 0 gdt_end: idtarg: |