4bf2a5b045
MdePkg: use CpuPause() in CpuDeadLoop()
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CpuPause() might allow the CPU to go into a lower power state
state while we spin.
On X86, CpuPause() executes a PAUSE instruction which the Intel
and AMD specs describe as follows:
Intel:
"PAUSE: An additional function of the PAUSE instruction is to reduce
the power consumed by a processor while executing a spin loop. A
processor can execute a spin-wait loop extremely quickly, causing the
processor to consume a lot of power while it waits for the resource it
is spinning on to become available. Inserting a pause instruction in a
spin-wait loop greatly reduces the processor?s power consumption."
AMD:
"PAUSE: Improves the performance of spin loops, by providing a hint to
the processor that the current code is in a spin loop. The processor
may use this to optimize power consumption while in the spin loop.
Architecturally, this instruction behaves like a NOP instruction."
On RISC-V and ARM64, CpuPause() executes a NOP, which is no worse than
the tight loop we have.
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Signed-off-by: Ankur Arora <ankur.a.arora@oracle.com>
Reviewed-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>
2021-03-25 03:40:17 +00:00
9344f09215
MdePkg: Replace BSD License with BSD+Patent License
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https://bugzilla.tianocore.org/show_bug.cgi?id=1373
Replace BSD 2-Clause License with BSD+Patent License. This change is
based on the following emails:
https://lists.01.org/pipermail/edk2-devel/2019-February/036260.html
https://lists.01.org/pipermail/edk2-devel/2018-October/030385.html
RFCs with detailed process for the license change:
V3: https://lists.01.org/pipermail/edk2-devel/2019-March/038116.html
V2: https://lists.01.org/pipermail/edk2-devel/2019-March/037669.html
V1: https://lists.01.org/pipermail/edk2-devel/2019-March/037500.html
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
2019-04-09 10:58:13 -07:00
127010dd96
Minor grammatical work--mostly adding periods. Items with ONLY period added did not have the heading date changed, but Items with content changes had heading copyright dates updated. Sending separately a list of files missing Doxygen @param and @return information. (PENDING)
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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10596 6f19259b-4bc3-4df7-8a09-765794883524
2010-06-24 00:20:35 +00:00
bb817c56c5
Update the copyright notice format
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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10405 6f19259b-4bc3-4df7-8a09-765794883524
2010-04-23 16:00:47 +00:00
9e5acfd583
Change style 0 == Index to Index == 0
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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@7493 6f19259b-4bc3-4df7-8a09-765794883524
2009-02-10 13:17:51 +00:00
373ade0eb6
Update copyright for files modified in this year
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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@7148 6f19259b-4bc3-4df7-8a09-765794883524
2008-12-29 14:07:07 +00:00
1efcc4ae46
remove unnecessary comments introduced by tools from MdePkg. The regular express is "//^p//[ ]Include[ ]common[ ]header[ ]file[ ]for[ ]this[ ]module[.]^p//"
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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5911 6f19259b-4bc3-4df7-8a09-765794883524
2008-09-17 07:46:17 +00:00
38bbd3d91c
Code scrub:
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MdePkg/Library/BaseCacheMaintenanceLib
MdePkg/Library/BaseDebugLibNull
MdePkg/Library/BaseIoLibIntrinsic
MdePkg/Library/BaseLib
MdePkg/Library/BaseMemoryLib
MdePkg/Library/BaseMemoryLibMmx
MdePkg/Library/BaseMemoryLibOptDxe
MdePkg/Library/BaseMemoryLibOptPei
MdePkg/Library/BaseMemoryLibRepStr
MdePkg/Library/BaseMemoryLibSse2
MdePkg/Library/BasePeCoffGetEntryPointLib
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5426 6f19259b-4bc3-4df7-8a09-765794883524
2008-07-08 09:38:43 +00:00
46817e4eb2
Use <> in #include statements instead of "" for include files from packages
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Use '/' instead of '\' for all file references
Remove redundant use of $(WORKSPACE) from DSC, FDF, INF, and DEC files
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3673 6f19259b-4bc3-4df7-8a09-765794883524
2007-08-17 21:04:27 +00:00
2553c3f39c
add in proper include for this file.
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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3128 6f19259b-4bc3-4df7-8a09-765794883524
2007-07-06 14:00:46 +00:00
f734a10ab1
Removed CommonHeader.h generated file from the MdePkg.
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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2922 6f19259b-4bc3-4df7-8a09-765794883524
2007-06-29 23:22:13 +00:00
e1f414b6a7
Import some basic libraries instances for Mde Packages.
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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2704 6f19259b-4bc3-4df7-8a09-765794883524
2007-06-22 03:21:45 +00:00
586cd1f1f4
Moved the MdePkg to OldMdePkg so that new code in MdePkg does not break existing builds. Also updated the SPD and FPD files UiNames
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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2616 6f19259b-4bc3-4df7-8a09-765794883524
2007-06-01 14:49:55 +00:00
878ddf1fc3
Initial import.
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git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3 6f19259b-4bc3-4df7-8a09-765794883524
2006-04-21 22:54:32 +00:00
Ankur Arora
Michael D Kinney
myronporter
hhtian
lgao4
qhuang8
vanjeff
yshang1
mdkinney
qwang12
AJFISH
lhauch
bbahnsen