From 25ae24c53dbada6be01791c5f15b26d103ee588d Mon Sep 17 00:00:00 2001 From: Samuel Thibault <samuel.thibault@ens-lyon.org> Date: Wed, 26 Mar 2014 03:44:57 +0100 Subject: 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. --- console-client/vga-support.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'console-client') 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; -- cgit v1.2.3