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ArmVirtualizationPkg/PciHostBridgeDxe: abort if there's no PCI host bridge

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If VirtFdtDxe found no PCI host in the DTB, then the config space base
address will be left at zero -- the default is set in the DSC --, and we
should exit PciHostBridgeDxe immediately.

This causes gEfiPciRootBridgeIoProtocolGuid not to be installed, which in
turn prevents MdeModulePkg/Bus/Pci/PciBusDxe from binding (see
PciBusDriverBindingSupported()).

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Olivier Martin <Olivier.martin@arm.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16898 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Laszlo Ersek 2015-02-23 16:03:11 +00:00 committed by lersek
parent aca7e8b6d4
commit 120a25c287
2 changed files with 7 additions and 0 deletions
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6
ArmPlatformPkg/ArmVirtualizationPkg/PciHostBridgeDxe/PciHostBridge.c
View File

@ -85,6 +85,7 @@ PCI_HOST_BRIDGE_INSTANCE mPciHostBridgeInstanceTemplate = {
@param ImageHandle Handle of driver image
@param SystemTable Point to EFI_SYSTEM_TABLE
@retval EFI_ABORTED PCI host bridge not present
@retval EFI_OUT_OF_RESOURCES Can not allocate memory resource
@retval EFI_DEVICE_ERROR Can not install the protocol instance
@retval EFI_SUCCESS Success to initialize the Pci host bridge.
@ -102,6 +103,11 @@ InitializePciHostBridge (
PCI_HOST_BRIDGE_INSTANCE *HostBridge;
PCI_ROOT_BRIDGE_INSTANCE *PrivateData;
if (PcdGet64 (PcdPciExpressBaseAddress) == 0) {
DEBUG ((EFI_D_INFO, "%a: PCI host bridge not present\n", __FUNCTION__));
return EFI_ABORTED;
}
mDriverImageHandle = ImageHandle;
mResAperture[0][0].BusBase = PcdGet32 (PcdPciBusMin);

1
ArmPlatformPkg/ArmVirtualizationPkg/PciHostBridgeDxe/PciHostBridgeDxe.inf
View File

@ -58,6 +58,7 @@
gArmPlatformTokenSpaceGuid.PcdPciIoTranslation
gArmPlatformTokenSpaceGuid.PcdPciMmio32Base
gArmPlatformTokenSpaceGuid.PcdPciMmio32Size
gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseAddress
[depex]
gEfiMetronomeArchProtocolGuid