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| author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-08-31 20:41:03 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-08-31 20:41:03 -0700 |
| commit | 2f81eccbd7a5440b43ff874c8f02d6143f41ba4f (patch) | |
| tree | b08e2e80f8626efe0444c17adbaf3729a5469697 | |
| parent | 6db602d447fb6c3aeb020c5dff5219de317f8bb4 (diff) | |
| parent | 4221d014ea04d439e6d1e65951c3b406e7c1b7ab (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.c | 34 |
1 files changed, 21 insertions, 13 deletions
diff --git a/arch/i386/boot/video-vesa.c b/arch/i386/boot/video-vesa.c index f1bc71e948c..19219071071 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; |