diff options
Diffstat (limited to 'IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyPci.c')
| -rw-r--r-- | IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyPci.c | 72 |
1 files changed, 71 insertions, 1 deletions
diff --git a/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyPci.c b/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyPci.c index c4c77ec344..8ffdf0c1ff 100644 --- a/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyPci.c +++ b/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/LegacyPci.c @@ -41,7 +41,7 @@ BOOLEAN mIgnoreBbsUpdateFlag; BOOLEAN mVgaInstallationInProgress = FALSE;
UINT32 mRomCount = 0x00;
ROM_INSTANCE_ENTRY mRomEntry[ROM_MAX_ENTRIES];
-
+EDKII_IOMMU_PROTOCOL *mIoMmu;
/**
Query shadowed legacy ROM parameters registered by RomShadow() previously.
@@ -2697,6 +2697,61 @@ Done: }
/**
+ Let IOMMU grant DMA access for the PCI device.
+
+ @param PciHandle The EFI handle for the PCI device.
+ @param HostAddress The system memory address to map to the PCI controller.
+ @param NumberOfBytes The number of bytes to map.
+
+ @retval EFI_SUCCESS The DMA access is granted.
+**/
+EFI_STATUS
+IoMmuGrantAccess (
+ IN EFI_HANDLE PciHandle,
+ IN EFI_PHYSICAL_ADDRESS HostAddress,
+ IN UINTN NumberOfBytes
+ )
+{
+ EFI_PHYSICAL_ADDRESS DeviceAddress;
+ VOID *Mapping;
+ EFI_STATUS Status;
+
+ if (PciHandle == NULL) {
+ return EFI_UNSUPPORTED;
+ }
+
+ Status = EFI_SUCCESS;
+ if (mIoMmu == NULL) {
+ gBS->LocateProtocol (&gEdkiiIoMmuProtocolGuid, NULL, (VOID **)&mIoMmu);
+ }
+ if (mIoMmu != NULL) {
+ Status = mIoMmu->Map (
+ mIoMmu,
+ EdkiiIoMmuOperationBusMasterCommonBuffer,
+ (VOID *)(UINTN)HostAddress,
+ &NumberOfBytes,
+ &DeviceAddress,
+ &Mapping
+ );
+ if (EFI_ERROR(Status)) {
+ DEBUG ((DEBUG_ERROR, "LegacyPci - IoMmuMap - %r\n", Status));
+ } else {
+ ASSERT (DeviceAddress == HostAddress);
+ Status = mIoMmu->SetAttribute (
+ mIoMmu,
+ PciHandle,
+ Mapping,
+ EDKII_IOMMU_ACCESS_READ | EDKII_IOMMU_ACCESS_WRITE
+ );
+ if (EFI_ERROR(Status)) {
+ DEBUG ((DEBUG_ERROR, "LegacyPci - IoMmuSetAttribute - %r\n", Status));
+ }
+ }
+ }
+ return Status;
+}
+
+/**
Load a legacy PC-AT OPROM on the PciHandle device. Return information
about how many disks were added by the OPROM and the shadow address and
size. DiskStart & DiskEnd are INT 13h drive letters. Thus 0x80 is C:
@@ -2978,6 +3033,21 @@ LegacyBiosInstallPciRom ( RuntimeImageLength = Pcir->MaxRuntimeImageLength * 512;
}
}
+
+ //
+ // Grant access for below 1M
+ // BDA/EBDA/LowPMM and scratch memory for OPROM.
+ //
+ IoMmuGrantAccess (PciHandle, 0, SIZE_1MB);
+ //
+ // Grant access for HiPmm
+ //
+ IoMmuGrantAccess (
+ PciHandle,
+ Private->IntThunk->EfiToLegacy16InitTable.HiPmmMemory,
+ Private->IntThunk->EfiToLegacy16InitTable.HiPmmMemorySizeInBytes
+ );
+
//
// Shadow and initialize the OpROM.
//
|