/** @file\r
PCI resouces support functions implemntation for PCI Bus module.\r
\r
-Copyright (c) 2006 - 2009, Intel Corporation\r
-All rights reserved. This program and the accompanying materials\r
+Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r
+This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution. The full text of the license may be found at\r
http://opensource.org/licenses/bsd-license.php\r
//\r
// If the device has children, create a bridge resource node for this PPB\r
// Note: For PPB, memory aperture is aligned with 1MB and IO aperture\r
- // is aligned with 4KB\r
- // This device is typically a bridge device like PPB and P2C\r
- // Note: 0x1000 aligned\r
+ // is aligned with 4KB (smaller alignments may be supported).\r
//\r
IoBridge = CreateResourceNode (\r
Temp,\r
0,\r
- 0xFFF,\r
+ Temp->BridgeIoAlignment,\r
PPB_IO_RANGE,\r
PciBarTypeIo16,\r
PciResUsageTypical\r
IN PCI_RESOURCE_NODE *PMem64Node\r
)\r
{\r
- BOOLEAN HasOprom;\r
PCI_IO_DEVICE *Temp;\r
- LIST_ENTRY *CurrentLink;\r
+ LIST_ENTRY *ChildDeviceLink;\r
+ LIST_ENTRY *ChildNodeLink;\r
+ LIST_ENTRY *NextChildNodeLink;\r
+ PCI_RESOURCE_NODE *TempNode;\r
\r
//\r
- // For RootBridge, PPB , P2C, go recursively to traverse all its children\r
- // to find if this bridge and downstream has OptionRom.\r
+ // If any child device has both option ROM and 64-bit BAR, degrade its PMEM64/MEM64\r
+ // requests in case that if a legacy option ROM image can not access 64-bit resources.\r
//\r
- HasOprom = FALSE;\r
- CurrentLink = Bridge->ChildList.ForwardLink;\r
- while (CurrentLink != NULL && CurrentLink != &Bridge->ChildList) {\r
-\r
- Temp = PCI_IO_DEVICE_FROM_LINK (CurrentLink);\r
+ ChildDeviceLink = Bridge->ChildList.ForwardLink;\r
+ while (ChildDeviceLink != NULL && ChildDeviceLink != &Bridge->ChildList) {\r
+ Temp = PCI_IO_DEVICE_FROM_LINK (ChildDeviceLink);\r
if (Temp->RomSize != 0) {\r
- HasOprom = TRUE;\r
- break;\r
+ if (!IsListEmpty (&Mem64Node->ChildList)) { \r
+ ChildNodeLink = Mem64Node->ChildList.ForwardLink;\r
+ while (ChildNodeLink != &Mem64Node->ChildList) {\r
+ TempNode = RESOURCE_NODE_FROM_LINK (ChildNodeLink);\r
+ NextChildNodeLink = ChildNodeLink->ForwardLink;\r
+\r
+ if (TempNode->PciDev == Temp) {\r
+ RemoveEntryList (ChildNodeLink);\r
+ InsertResourceNode (Mem32Node, TempNode);\r
+ }\r
+ ChildNodeLink = NextChildNodeLink;\r
+ } \r
+ }\r
+\r
+ if (!IsListEmpty (&PMem64Node->ChildList)) { \r
+ ChildNodeLink = PMem64Node->ChildList.ForwardLink;\r
+ while (ChildNodeLink != &PMem64Node->ChildList) {\r
+ TempNode = RESOURCE_NODE_FROM_LINK (ChildNodeLink);\r
+ NextChildNodeLink = ChildNodeLink->ForwardLink;\r
+\r
+ if (TempNode->PciDev == Temp) {\r
+ RemoveEntryList (ChildNodeLink);\r
+ InsertResourceNode (PMem32Node, TempNode);\r
+ }\r
+ ChildNodeLink = NextChildNodeLink;\r
+ } \r
+ }\r
+\r
}\r
- CurrentLink = CurrentLink->ForwardLink;\r
+ ChildDeviceLink = ChildDeviceLink->ForwardLink;\r
}\r
\r
//\r
- // If bridge doesn't support Prefetchable\r
- // memory64, degrade it to Prefetchable memory32\r
+ // If firmware is in 32-bit mode,\r
+ // then degrade PMEM64/MEM64 requests\r
//\r
- if (!BridgeSupportResourceDecode (Bridge, EFI_BRIDGE_PMEM64_DECODE_SUPPORTED)) {\r
+ if (sizeof (UINTN) <= 4) {\r
+ MergeResourceTree (\r
+ Mem32Node,\r
+ Mem64Node,\r
+ TRUE\r
+ );\r
+\r
MergeResourceTree (\r
PMem32Node,\r
PMem64Node,\r
);\r
} else {\r
//\r
- // if no PMem32 request and no OptionRom request, still keep PMem64. Otherwise degrade to PMem32\r
+ // if the bridge does not support MEM64, degrade MEM64 to MEM32\r
//\r
- if ((PMem32Node != NULL && (PMem32Node->Length != 0 && Bridge->Parent != NULL)) || HasOprom) {\r
- //\r
- // Fixed the issue that there is no resource for 64-bit (above 4G)\r
- //\r
+ if (!BridgeSupportResourceDecode (Bridge, EFI_BRIDGE_MEM64_DECODE_SUPPORTED)) {\r
+ MergeResourceTree (\r
+ Mem32Node,\r
+ Mem64Node,\r
+ TRUE\r
+ );\r
+ }\r
+\r
+ //\r
+ // if the bridge does not support PMEM64, degrade PMEM64 to PMEM32\r
+ //\r
+ if (!BridgeSupportResourceDecode (Bridge, EFI_BRIDGE_PMEM64_DECODE_SUPPORTED)) {\r
MergeResourceTree (\r
PMem32Node,\r
PMem64Node,\r
TRUE\r
);\r
- }\r
- }\r
-\r
+ } \r
\r
- //\r
- // If bridge doesn't support Mem64\r
- // degrade it to mem32\r
- //\r
- if (!BridgeSupportResourceDecode (Bridge, EFI_BRIDGE_MEM64_DECODE_SUPPORTED)) {\r
- MergeResourceTree (\r
- Mem32Node,\r
- Mem64Node,\r
- TRUE\r
- );\r
+ //\r
+ // if both PMEM64 and PMEM32 requests from child devices, which can not be satisfied\r
+ // by a P2P bridge simultaneously, keep PMEM64 and degrade PMEM32 to MEM32.\r
+ //\r
+ if (!IsListEmpty (&PMem64Node->ChildList) && Bridge->Parent != NULL) {\r
+ MergeResourceTree (\r
+ Mem32Node,\r
+ PMem32Node,\r
+ TRUE\r
+ );\r
+ }\r
}\r
\r
//\r
}\r
\r
//\r
- // if bridge supports combined Pmem Mem decoding\r
+ // if root bridge supports combined Pmem Mem decoding\r
// merge these two type of resource\r
//\r
if (BridgeSupportResourceDecode (Bridge, EFI_BRIDGE_PMEM_MEM_COMBINE_SUPPORTED)) {\r
FALSE\r
);\r
\r
+ //\r
+ // No need to check if to degrade MEM64 after merge, because\r
+ // if there are PMEM64 still here, 64-bit decode should be supported\r
+ // by the root bride.\r
+ //\r
MergeResourceTree (\r
Mem64Node,\r
PMem64Node,\r
//\r
if (Node->Virtual) {\r
ProgramVfBar (Base, Node);\r
+ return;\r
}\r
\r
Address = 0;\r
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