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OvmfPkg/FdtPciHostBridgeLib: io range is not mandatory 

io range is not mandatory according to pcie spec,
so allow host bridges without io address space.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2022-06-02 10:42:12 +02:00 committed by mergify[bot]
parent 0223898f3e
commit b57911c84c
1 changed files with 23 additions and 22 deletions
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21
OvmfPkg/Fdt/FdtPciHostBridgeLib/FdtPciHostBridgeLib.c
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@ -292,13 +292,8 @@ ProcessPciHost (
}
}
if ((*IoSize == 0) || (*Mmio32Size == 0)) {
DEBUG ((
DEBUG_ERROR,
"%a: %a space empty\n",
__FUNCTION__,
(*IoSize == 0) ? "IO" : "MMIO32"
));
if (*Mmio32Size == 0) {
DEBUG ((DEBUG_ERROR, "%a: MMIO32 space empty\n", __FUNCTION__));
return EFI_PROTOCOL_ERROR;
}
@ -333,6 +328,7 @@ ProcessPciHost (
return Status;
}
if (*IoSize != 0) {
//
// Map the MMIO window that provides I/O access - the PCI host bridge code
// is not aware of this translation and so it will only map the I/O view
@ -340,6 +336,7 @@ ProcessPciHost (
//
Status = MapGcdMmioSpace (*IoBase + IoTranslation, *IoSize);
ASSERT_EFI_ERROR (Status);
}
return Status;
}
@ -413,17 +410,21 @@ PciHostBridgeGetRootBridges (
AllocationAttributes = EFI_PCI_HOST_BRIDGE_COMBINE_MEM_PMEM;
if (IoSize != 0) {
Io.Base = IoBase;
Io.Limit = IoBase + IoSize - 1;
} else {
Io.Base = MAX_UINT64;
Io.Limit = 0;
}
Mem.Base = Mmio32Base;
Mem.Limit = Mmio32Base + Mmio32Size - 1;
if (sizeof (UINTN) == sizeof (UINT64)) {
if ((sizeof (UINTN) == sizeof (UINT64)) && (Mmio64Size != 0)) {
MemAbove4G.Base = Mmio64Base;
MemAbove4G.Limit = Mmio64Base + Mmio64Size - 1;
if (Mmio64Size > 0) {
AllocationAttributes |= EFI_PCI_HOST_BRIDGE_MEM64_DECODE;
}
} else {
//
// UEFI mandates a 1:1 virtual-to-physical mapping, so on a 32-bit