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MdeModulePkg PciBusDxe: Increase the width of data read during oprom shadow

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REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2989

Long times spent on shadowing oprom from graphics card to system memory.
We are currently using 8 bit read cycles. This needs to be wider,
at least 32bit reads to reduce the time for oprom shadow.

Signed-off-by: Sumana Venur <sumana.venur@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
This commit is contained in:
Sumana Venur 2021-06-12 00:37:44 +08:00 committed by mergify[bot]
parent 04ddd1271e
commit cdf7544703
1 changed files with 2 additions and 2 deletions
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4
MdeModulePkg/Bus/Pci/PciBusDxe/PciOptionRomSupport.c
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@ -521,9 +521,9 @@ LoadOpRomImage (
//
PciDevice->PciRootBridgeIo->Mem.Read (
PciDevice->PciRootBridgeIo,
EfiPciWidthUint8,
EfiPciWidthUint32,
RomBar,
(UINT32) RomImageSize,
(UINT32) RomImageSize/sizeof(UINT32),
Image
);
RomInMemory = Image;