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| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2014-03-26 03:44:57 +0100 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2014-03-26 03:48:31 +0100 |
| commit | 25ae24c53dbada6be01791c5f15b26d103ee588d (patch) | |
| tree | 961bcfe409ca78b9cd9089b382d03a4205342390 | |
| parent | 6d5511668545d00da4e3e5dd142b4f082c76b083 (diff) | |
Align VGA buffers
Some "hardware" (such as kvm on linux 3.2) would hang when transferring
between video memory and unaligned main memory. This also allows
better optimized transfers anyway.
Thanks Petter Reinholdtsen for the report and patient tests.
* console-client/vga-support.c (vga_state): Force maximum alignment of
`videomem' and `fontmem' fields.
| -rw-r--r-- | console-client/vga-support.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/console-client/vga-support.c b/console-client/vga-support.c index ce339e19..04926f92 100644 --- a/console-client/vga-support.c +++ b/console-client/vga-support.c @@ -55,8 +55,11 @@ struct vga_state unsigned char attr_mode; - char videomem[2 * 80 * 25]; - unsigned char fontmem[2 * VGA_FONT_SIZE * VGA_FONT_HEIGHT]; + /* Alignment is required by some "hardware", and optimizes transfers. */ + char videomem[2 * 80 * 25] + __attribute__ ((aligned (__BIGGEST_ALIGNMENT__))); + unsigned char fontmem[2 * VGA_FONT_SIZE * VGA_FONT_HEIGHT] + __attribute__ ((aligned (__BIGGEST_ALIGNMENT__))); }; static struct vga_state *vga_state; |