/** @file\r
- Timer Library Functions.\r
+ Provides calibrated delay and performance counter services.\r
\r
- Copyright (c) 2006 - 2008, Intel Corporation\r
- All rights reserved. This program and the accompanying materials\r
- are licensed and made available under the terms and conditions of the BSD License\r
- which accompanies this distribution. The full text of the license may be found at\r
- http://opensource.org/licenses/bsd-license.php\r
+Copyright (c) 2006 - 2008, Intel Corporation\r
+All rights reserved. This program and the accompanying materials\r
+are licensed and made available under the terms and conditions of the BSD License\r
+which accompanies this distribution. The full text of the license may be found at\r
+http://opensource.org/licenses/bsd-license.php\r
\r
- THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
- WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#define __TIMER_LIB__\r
\r
/**\r
+ Stalls the CPU for at least the given number of microseconds.\r
+\r
Stalls the CPU for the number of microseconds specified by MicroSeconds.\r
\r
@param MicroSeconds The minimum number of microseconds to delay.\r
\r
- @return MicroSeconds\r
+ @return The value of MicroSeconds inputted.\r
\r
**/\r
UINTN\r
);\r
\r
/**\r
+ Stalls the CPU for at least the given number of nanoseconds.\r
+\r
Stalls the CPU for the number of nanoseconds specified by NanoSeconds.\r
\r
@param NanoSeconds The minimum number of nanoseconds to delay.\r
\r
- @return NanoSeconds\r
+ @return The value of NanoSeconds inputted.\r
\r
**/\r
UINTN\r
);\r
\r
/**\r
- Retrieves the current value of a 64-bit free running performance counter. \r
+ Retrieves the current value of a 64-bit free running performance counter.\r
+\r
The counter can either count up by 1 or count down by 1. If the physical\r
performance counter counts by a larger increment, then the counter values\r
must be translated. The properties of the counter can be retrieved from\r