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MdePkg: Add more DataBits support to Port80 output

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The BasePostCodeLibPort80 instance just prints UINT8 to IoPort 80. Some boards
may support 16bit or 32bit. To support them, new PCD PcdPort80DataWidth is
introduced to specify the width of data bits to Port80.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18765 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Liming Gao
2015-11-11 02:16:35 +00:00
committed by lgao4
parent 9ddd7d7aec
commit 661c306ceb
4 changed files with 29 additions and 5 deletions
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5
MdePkg/MdePkg.dec
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@@ -1938,6 +1938,11 @@
# @Expression 0x80000002 | (gEfiMdePkgTokenSpaceGuid.PcdPostCodePropertyMask & 0xFC) == 0
gEfiMdePkgTokenSpaceGuid.PcdPostCodePropertyMask|0|UINT8|0x0000000b
## The bit width of data to be written to Port80. The default value is 8.
# @Prompt Port80 Data Width
# @ValidList 0x80000001 | 8, 16, 32
gEfiMdePkgTokenSpaceGuid.PcdPort80DataWidth|8|UINT8|0x0000002d
## This value is used to configure X86 Processor FSB clock.
# @Prompt FSB Clock.
gEfiMdePkgTokenSpaceGuid.PcdFSBClock|200000000|UINT32|0x0000000c