3900a63e3a
Today's UefiPayloadPkg always uses 0xE0000000 as the PCIE base address and ignores the value set in AcpiBoardInfo HOB created by the boot loader. This makes the payload binary cannot work in environment where the PCIE base address set by boot loader doesn't equal to 0xE0000000. The patch enhances UefiPayloadPkg so that the PCIE base address set by boot loader in the AcpiBoardInfo HOB is used. Signed-off-by: Ray Ni <ray.ni@intel.com> Reviewed-by: Maurice Ma <maurice.ma@intel.com> Reviewed-by: Guo Dong <guo.dong@intel.com> Cc: Benjamin You <benjamin.you@intel.com>
60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
/** @file
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PCI Segment Information Library that returns one segment whose
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segment base address is retrieved from AcpiBoardInfo HOB.
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Copyright (c) 2020, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <PiDxe.h>
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#include <Guid/AcpiBoardInfoGuid.h>
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#include <Library/HobLib.h>
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#include <Library/PciSegmentInfoLib.h>
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#include <Library/DebugLib.h>
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STATIC PCI_SEGMENT_INFO mPciSegment0 = {
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0, // Segment number
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0, // To be fixed later
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0, // Start bus number
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255 // End bus number
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};
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/**
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Return an array of PCI_SEGMENT_INFO holding the segment information.
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Note: The returned array/buffer is owned by callee.
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@param Count Return the count of segments.
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@retval A callee owned array holding the segment information.
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**/
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PCI_SEGMENT_INFO *
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EFIAPI
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GetPciSegmentInfo (
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UINTN *Count
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)
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{
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EFI_HOB_GUID_TYPE *GuidHob;
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ACPI_BOARD_INFO *AcpiBoardInfo;
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ASSERT (Count != NULL);
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if (Count == NULL) {
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return NULL;
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}
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if (mPciSegment0.BaseAddress == 0) {
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//
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// Find the acpi board information guid hob
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//
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GuidHob = GetFirstGuidHob (&gUefiAcpiBoardInfoGuid);
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ASSERT (GuidHob != NULL);
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AcpiBoardInfo = (ACPI_BOARD_INFO *) GET_GUID_HOB_DATA (GuidHob);
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mPciSegment0.BaseAddress = AcpiBoardInfo->PcieBaseAddress;
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}
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*Count = 1;
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return &mPciSegment0;
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}
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