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authorH. Peter Anvin <hpa@linux.intel.com>2009-04-01 18:20:11 -0700
committerH. Peter Anvin <hpa@zytor.com>2009-04-09 16:08:12 -0700
commitcf06de7b9cdd3efee7a59dced1977b3c21d43732 (patch)
tree22a4fd8675461fc35756573a3964e07a236cb71b /arch/x86/boot/video.h
parent0a706db320768f8f6e43bbf73b58d2aabdc93354 (diff)
downloadlinux-cf06de7b9cdd3efee7a59dced1977b3c21d43732.tar.bz2
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.h14
1 files changed, 0 insertions, 14 deletions
diff --git a/arch/x86/boot/video.h b/arch/x86/boot/video.h
index ee63f5d14461..5bb174a997fc 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)
{