delta/syslinux.git/core/timer.inc, branch thread git.kernel.org: pub/scm/boot/syslinux/syslinux.git core: make sure __jiffies is aligned 2009-09-03T05:28:38+00:00 H. Peter Anvin hpa@zytor.com 2009-09-03T05:28:38+00:00 03f467144fdef6c8eb907842620f3fcb2b5470d0 __jiffies really wants to be aligned. We're not SMP, so technically it will be atomic anyway. Still... Signed-off-by: H. Peter Anvin <hpa@zytor.com> 
__jiffies really wants to be aligned.  We're not SMP, so technically
it will be atomic anyway.  Still...

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
core: hook INT 1Ch for a simple monotonic timer 2009-09-03T00:44:32+00:00 H. Peter Anvin hpa@zytor.com 2009-09-03T00:44:32+00:00 75d4dec2f651c9f25fa95d6b6960db7c4dcfd7a0 The BIOS_timer variable at 4C6h is somewhat unreliable... it is documented to wrap at "midnight", norminally after 1627419 ticks (0x18d51b), which is a rather awkward number to deal with modulo. Instead, hook the INT 1Ch secondary timer interrupt and just count a simple incrementing variable. Signed-off-by: H. Peter Anvin <hpa@zytor.com> 
The BIOS_timer variable at 4C6h is somewhat unreliable... it is
documented to wrap at "midnight", norminally after 1627419 ticks
(0x18d51b), which is a rather awkward number to deal with modulo.
Instead, hook the INT 1Ch secondary timer interrupt and just count a
simple incrementing variable.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>