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/*
* Some or all of this work - Copyright (c) 2006 - 2021, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* Neither the name of Intel Corporation nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Bug 47:
*
* SUMMARY: Timer operator doesn’t provide gradually increased values
*
* APPEARANCE
*
* The ASL Timer operator is declared as a 64-bit one
* "17.5.117 Timer (Get 64-Bit Timer Value)" but actually,
* we observe it is overrun during each 15 minutes, but we
* expect that to be one time in more than 50 thousand years!
*
* SPECS (17.5.117)
*
* The value resulting from this opcode is 64-bits.
* It is monotonically increasing, but it is not guaranteed
* that every result will be unique, i.e. two subsequent
* instructions may return the same value. The only guarantee
* is that each subsequent evaluation will be greater-than or
* equal to the previous ones.
*
* Timer operator doesn’t provide
* gradually increased values. The test takes long time,
* and ends only when encounters error. Since the test is
* based on Timer operator which is under testing and works
* incorrectly we excluded this test from the normally run
* tests set. We can't even control the time the run of test
* is in progress from inside the test.
*/
Method (MD77, 0, Serialized)
{
Name (LPN0, 0x00)
Name (LPC0, 0x00)
Name (TSLP, 0x1388) /* MilliSecs to sleep each cycle (5 secs) */
Name (NCCL, 0xB4) /* Number of cycles */
LPN0 = NCCL /* \MD77.NCCL */
LPC0 = 0x00
Local0 = (TSLP * LPN0) /* \MD77.LPN0 */
Divide (Local0, 0x03E8, Local1, Local2)
Debug = Concatenate ("Maximal time of execution (in seconds): 0x", Local2)
Local0 = Timer
Local5 = 0x00
Debug = Concatenate ("Start value of Timer : 0x", Local0)
While (LPN0)
{
Local7 = Timer
Debug = Concatenate ("Timer: 0x", Local7)
If ((Local0 > Local7))
{
/* if (Local5) { */
ERR (__METHOD__, ZFFF, __LINE__, 0x00, 0x00, Local0, Local7)
Debug = Concatenate ("Cur timer : 0x", Local7)
Debug = Concatenate ("Start timer : 0x", Local0)
Debug = Concatenate ("Step of cycle : 0x", TSLP)
Break
/* } */
/* First time in more than 50 thousand years! */
Local5 = 0x01
}
Sleep (TSLP)
LPN0--
LPC0++
}
Debug = Concatenate ("Start timer: 0x", Local0)
Debug = Concatenate ("Finish timer: 0x", Local7)
Local6 = (Local7 - Local0)
Local0 = TMR0 (Local6)
Debug = Concatenate ("Run time (in seconds): 0x", Local0)
}
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