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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2007-08-31 20:41:03 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-08-31 20:41:03 -0700
commit2f81eccbd7a5440b43ff874c8f02d6143f41ba4f (patch)
treeb08e2e80f8626efe0444c17adbaf3729a5469697
parent6db602d447fb6c3aeb020c5dff5219de317f8bb4 (diff)
parent4221d014ea04d439e6d1e65951c3b406e7c1b7ab (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hpa/linux-2.6-x86setup
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hpa/linux-2.6-x86setup: [x86 setup] Don't rely on the VESA BIOS being register-clean
-rw-r--r--arch/i386/boot/video-vesa.c34
1 files changed, 21 insertions, 13 deletions
diff --git a/arch/i386/boot/video-vesa.c b/arch/i386/boot/video-vesa.c
index f1bc71e948cf..192190710710 100644
--- a/arch/i386/boot/video-vesa.c
+++ b/arch/i386/boot/video-vesa.c
@@ -29,7 +29,7 @@ static void vesa_store_mode_params_graphics(void);
static int vesa_probe(void)
{
#if defined(CONFIG_VIDEO_VESA) || defined(CONFIG_FIRMWARE_EDID)
- u16 ax;
+ u16 ax, cx, di;
u16 mode;
addr_t mode_ptr;
struct mode_info *mi;
@@ -39,9 +39,11 @@ static int vesa_probe(void)
vginfo.signature = VBE2_MAGIC;
- /* Optimistically assume a VESA BIOS is register-clean... */
ax = 0x4f00;
- asm("int $0x10" : "+a" (ax), "=m" (vginfo) : "D" (&vginfo));
+ di = (size_t)&vginfo;
+ asm(INT10
+ : "+a" (ax), "+D" (di), "=m" (vginfo)
+ : : "ebx", "ecx", "edx", "esi");
if (ax != 0x004f ||
vginfo.signature != VESA_MAGIC ||
@@ -64,9 +66,11 @@ static int vesa_probe(void)
memset(&vminfo, 0, sizeof vminfo); /* Just in case... */
ax = 0x4f01;
- asm("int $0x10"
- : "+a" (ax), "=m" (vminfo)
- : "c" (mode), "D" (&vminfo));
+ cx = mode;
+ di = (size_t)&vminfo;
+ asm(INT10
+ : "+a" (ax), "+c" (cx), "+D" (di), "=m" (vminfo)
+ : : "ebx", "edx", "esi");
if (ax != 0x004f)
continue;
@@ -102,16 +106,18 @@ static int vesa_probe(void)
static int vesa_set_mode(struct mode_info *mode)
{
- u16 ax;
+ u16 ax, bx, cx, di;
int is_graphic;
u16 vesa_mode = mode->mode - VIDEO_FIRST_VESA;
memset(&vminfo, 0, sizeof vminfo); /* Just in case... */
ax = 0x4f01;
- asm("int $0x10"
- : "+a" (ax), "=m" (vminfo)
- : "c" (vesa_mode), "D" (&vminfo));
+ cx = vesa_mode;
+ di = (size_t)&vminfo;
+ asm(INT10
+ : "+a" (ax), "+c" (cx), "+D" (di), "=m" (vminfo)
+ : : "ebx", "edx", "esi");
if (ax != 0x004f)
return -1;
@@ -129,9 +135,11 @@ static int vesa_set_mode(struct mode_info *mode)
ax = 0x4f02;
- asm volatile("int $0x10"
- : "+a" (ax)
- : "b" (vesa_mode), "D" (0));
+ bx = vesa_mode;
+ di = 0;
+ asm volatile(INT10
+ : "+a" (ax), "+b" (bx), "+D" (di)
+ : : "ecx", "edx", "esi");
if (ax != 0x004f)
return -1;