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MdeModulePkg/PciBus: convert host address to device address

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According to UEFI spec 2.7, PciRootBridgeIo->Configuration() should
return host address (CPU view ddress) rather than device address
(PCI view address), so in function GetMmioAddressTranslationOffset we
need to convert the range to device address before comparing.

And device address = host address + translation offset.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Heyi Guo <heyi.guo@linaro.org>
Signed-off-by: Yi Li <phoenix.liyi@huawei.com>
Reviewed-by: Ni Ruiyu <ruiyu.ni@intel.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
This commit is contained in:
Heyi Guo 2018-02-08 11:13:27 +08:00 committed by Ard Biesheuvel
parent 74d0a339b8
commit c03860d052
1 changed files with 6 additions and 2 deletions
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8
MdeModulePkg/Bus/Pci/PciBusDxe/PciIo.c
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@ -1812,10 +1812,14 @@ GetMmioAddressTranslationOffset (
return (UINT64) -1;
}
// According to UEFI 2.7, EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL::Configuration()
// returns host address instead of device address, while AddrTranslationOffset
// is not zero, and device address = host address + AddrTranslationOffset, so
// we convert host address to device address for range compare.
while (Configuration->Desc == ACPI_ADDRESS_SPACE_DESCRIPTOR) {
if ((Configuration->ResType == ACPI_ADDRESS_SPACE_TYPE_MEM) &&
(Configuration->AddrRangeMin <= AddrRangeMin) &&
(Configuration->AddrRangeMin + Configuration->AddrLen >= AddrRangeMin + AddrLen)
(Configuration->AddrRangeMin + Configuration->AddrTranslationOffset <= AddrRangeMin) &&
(Configuration->AddrRangeMin + Configuration->AddrLen + Configuration->AddrTranslationOffset >= AddrRangeMin + AddrLen)
) {
return Configuration->AddrTranslationOffset;
}