Import of Intel ACPI 20030228 vendor distribution

1 files changed, 7 insertions, 4 deletions

diff --git a/sys/contrib/dev/acpica/hwtimer.c b/sys/contrib/dev/acpica/hwtimer.c
index d7fe8e1..92267a6 100644
--- a/sys/contrib/dev/acpica/hwtimer.c
+++ b/sys/contrib/dev/acpica/hwtimer.c
@@ -2,7 +2,7 @@
 /******************************************************************************
  *
  * Name: hwtimer.c - ACPI Power Management Timer Interface
- *              $Revision: 21 $
+ *              $Revision: 24 $
  *
  *****************************************************************************/
 
@@ -10,7 +10,7 @@
  *
  * 1. Copyright Notice
  *
- * Some or all of this work - Copyright (c) 1999 - 2002, Intel Corp.
+ * Some or all of this work - Copyright (c) 1999 - 2003, Intel Corp.
  * All rights reserved.
  *
  * 2. License
@@ -210,10 +210,13 @@ AcpiGetTimer (
  *              transitions (unlike many CPU timestamp counters) -- making it
  *              a versatile and accurate timer.
  *
- *              Note that this function accomodates only a single timer
+ *              Note that this function accommodates only a single timer
  *              rollover.  Thus for 24-bit timers, this function should only
  *              be used for calculating durations less than ~4.6 seconds
- *              (~20 hours for 32-bit timers).
+ *              (~20 minutes for 32-bit timers) -- calculations below
+ *
+ *              2**24 Ticks / 3,600,000 Ticks/Sec = 4.66 sec
+ *              2**32 Ticks / 3,600,000 Ticks/Sec = 1193 sec or 19.88 minutes
  *
  ******************************************************************************/