Author: stepan Date: 2009-05-29 15:08:27 +0200 (Fri, 29 May 2009) New Revision: 4323
Modified: trunk/coreboot-v2/src/arch/i386/lib/c_start.S Log: 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 <[email protected]> Acked-by: Peter Stuge <[email protected]> Modified: trunk/coreboot-v2/src/arch/i386/lib/c_start.S =================================================================== --- trunk/coreboot-v2/src/arch/i386/lib/c_start.S 2009-05-29 03:44:47 UTC (rev 4322) +++ trunk/coreboot-v2/src/arch/i386/lib/c_start.S 2009-05-29 13:08:27 UTC (rev 4323) @@ -253,7 +253,7 @@ /* 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 @@ .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: -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
