Hi Simon,
On Thu, Apr 18, 2013 at 12:13 PM, Simon Glass <s...@chromium.org> wrote:
>
> While we don't want PCAT timers for timing, we want timer 2 so that we can
> still make a beep. Re-purpose the PCAT driver for this, and enable it in
> coreboot.
>
> Signed-off-by: Simon Glass <s...@chromium.org>
> ---
> arch/x86/include/asm/u-boot-x86.h | 1 +
> arch/x86/lib/Makefile | 2 +-
> arch/x86/lib/pcat_timer.c | 69
++-------------------------------------
> arch/x86/lib/tsc_timer.c | 6 +++-
> include/configs/coreboot.h | 1 +
> 5 files changed, 11 insertions(+), 68 deletions(-)
[snip]
> -/* this is not very exact */
> -void __udelay(unsigned long usec)
> -{
> - int counter;
> - int wraps;
> -
> - if (timer_init_done) {
> - counter = read_pit();
> - wraps = usec / 1000;
> - usec = usec % 1000;
> -
> - usec *= 1194;
> - usec /= 1000;
> - usec += counter;
> -
> - while (usec > 1194) {
> - usec -= 1194;
> - wraps++;
> - }
> -
> - while (1) {
> - int new_count = read_pit();
> -
> - if (((new_count < usec) && !wraps) || wraps < 0)
> - break;
> -
> - if (new_count > counter)
> - wraps--;
> -
> - counter = new_count;
> - }
> - }
> -
> -}
This does not seem related...
Regards,
Graeme
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