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MdeModulePkg PCD: Add DynamicEx PcdVpdBaseAddress64 for non SPI platform

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https://bugzilla.tianocore.org/show_bug.cgi?id=1356
Current PcdVpdBaseAddress is 32bit static Pcd. NON SPI platform needs to
configure it as Dynamic PCD. Emulator platform (such as NT32) may set its
value to 64bit address.
To meet with this usage, 64bit DynamicEx PcdVpdBaseAddress64 is introduced.
If its value is not zero, it will be used.
If its value is zero, static PcdVpdBaseAddress will be used.
When NON SPI platform enables VPD PCD, they need to set PcdVpdBaseAddress64.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Liming Gao <liming.gao@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Dandan Bi <dandan.bi@intel.com>
This commit is contained in:
Liming Gao
2018-11-22 22:10:29 +08:00
parent 277a3958d9
commit 534efca06f
8 changed files with 54 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
MdeModulePkg/Universal/PCD/Dxe/Pcd.c
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@@ -109,6 +109,7 @@ EFI_GET_PCD_INFO_PROTOCOL mEfiGetPcdInfoInstance = {
};
EFI_HANDLE mPcdHandle = NULL;
UINTN mVpdBaseAddress = 0;
/**
Main entry for PCD DXE driver.
@@ -175,6 +176,21 @@ PcdDxeInit (
&Registration
);
//
// Cache VpdBaseAddress in entry point for the following usage.
//
//
// PcdVpdBaseAddress64 is DynamicEx PCD only. So, DxePcdGet64Ex() is used to get its value.
//
mVpdBaseAddress = (UINTN) DxePcdGet64Ex (&gEfiMdeModulePkgTokenSpaceGuid, PcdToken (PcdVpdBaseAddress64));
if (mVpdBaseAddress == 0) {
//
// PcdVpdBaseAddress64 is not set, get value from PcdVpdBaseAddress.
//
mVpdBaseAddress = (UINTN) PcdGet32 (PcdVpdBaseAddress);
}
return Status;
}