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| author | H. Peter Anvin <hpa@linux.intel.com> | 2009-04-01 18:20:11 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2009-04-09 16:08:12 -0700 |
| commit | cf06de7b9cdd3efee7a59dced1977b3c21d43732 (patch) | |
| tree | 22a4fd8675461fc35756573a3964e07a236cb71b /arch/x86/boot/video.h | |
| parent | 0a706db320768f8f6e43bbf73b58d2aabdc93354 (diff) | |
| download | op-kernel-dev-cf06de7b9cdd3efee7a59dced1977b3c21d43732.zip op-kernel-dev-cf06de7b9cdd3efee7a59dced1977b3c21d43732.tar.gz | |
x86, setup: "glove box" BIOS interrupts in the video code
Impact: BIOS proofing
"Glove box" off BIOS interrupts in the video code.
LKML-Reference: <49DE7F79.4030106@zytor.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'arch/x86/boot/video.h')
| -rw-r--r-- | arch/x86/boot/video.h | 14 |
1 files changed, 0 insertions, 14 deletions
diff --git a/arch/x86/boot/video.h b/arch/x86/boot/video.h index ee63f5d..5bb174a 100644 --- a/arch/x86/boot/video.h +++ b/arch/x86/boot/video.h @@ -112,20 +112,6 @@ extern int force_x, force_y; /* Don't query the BIOS for cols/rows */ extern int do_restore; /* Restore screen contents */ extern int graphic_mode; /* Graphics mode with linear frame buffer */ -/* - * int $0x10 is notorious for touching registers it shouldn't. - * gcc doesn't like %ebp being clobbered, so define it as a push/pop - * sequence here. - * - * A number of systems, including the original PC can clobber %bp in - * certain circumstances, like when scrolling. There exists at least - * one Trident video card which could clobber DS under a set of - * circumstances that we are unlikely to encounter (scrolling when - * using an extended graphics mode of more than 800x600 pixels), but - * it's cheap insurance to deal with that here. - */ -#define INT10 "pushl %%ebp; pushw %%ds; int $0x10; popw %%ds; popl %%ebp" - /* Accessing VGA indexed registers */ static inline u8 in_idx(u16 port, u8 index) { |
