linux-via-fixes.patch

   1 This path contains the following (from the ac patch):
   2
   3 - VIA timer bugfix
   4
   5 --- linux.org/arch/i386/kernel/time.c.orig      Sat Jun  2 16:06:59 2001
   6 +++ linux/arch/i386/kernel/time.c       Sat Jun  2 16:07:20 2001
   7 @@ -178,6 +178,15 @@
   8         jiffies_t = jiffies;
   9
  10         count |= inb_p(0x40) << 8;
  11 +
  12 +        /* VIA686a test code... reset the latch if count > max + 1 */
  13 +        if (count > LATCH) {
  14 +                outb_p(0x34, 0x43);
  15 +                outb_p(LATCH & 0xff, 0x40);
  16 +                outb(LATCH >> 8, 0x40);
  17 +                count = LATCH - 1;
  18 +        }
  19 +
  20         spin_unlock(&i8253_lock);
  21
  22         /*
  23 @@ -492,6 +501,24 @@
  24
  25                 count = inb_p(0x40);    /* read the latched count */
  26                 count |= inb(0x40) << 8;
  27 +
  28 +
  29 +                /* VIA686a test code... reset the latch if count > max */
  30 +                if (count > LATCH-1) {
  31 +                        static int last_whine;
  32 +                        outb_p(0x34, 0x43);
  33 +                        outb_p(LATCH & 0xff, 0x40);
  34 +                        outb(LATCH >> 8, 0x40);
  35 +                        count = LATCH - 1;
  36 +                        if(time_after(jiffies, last_whine))
  37 +                        {
  38 +                                printk(KERN_WARNING "probable hardware bug: clock timer configuration lost - probably a VIA686a motherboard.\n");
  39 +                                printk(KERN_WARNING "probable hardware bug: restoring chip configuration.\n");
  40 +                                last_whine = jiffies + HZ;
  41 +                        }
  42 +                }
  43 +
  44 +
  45                 spin_unlock(&i8253_lock);
  46
  47                 count = ((LATCH-1) - count) * TICK_SIZE;