#include <libfdt.h>\r
\r
#include <Guid/Fdt.h>\r
+#include <Guid/VirtioMmioTransport.h>\r
\r
#pragma pack (1)\r
typedef struct {\r
PropertyTypeUart,\r
PropertyTypeTimer,\r
PropertyTypePsci,\r
+ PropertyTypeFwCfg,\r
+ PropertyTypePciHost,\r
} PROPERTY_TYPE;\r
\r
typedef struct {\r
PROPERTY_TYPE Type;\r
- CHAR8 Compatible[20];\r
+ CHAR8 Compatible[32];\r
} PROPERTY;\r
\r
STATIC CONST PROPERTY CompatibleProperties[] = {\r
- { PropertyTypeGic, "arm,cortex-a15-gic" },\r
- { PropertyTypeRtc, "arm,pl031" },\r
- { PropertyTypeVirtio, "virtio,mmio" },\r
- { PropertyTypeUart, "arm,pl011" },\r
- { PropertyTypeTimer, "arm,armv7-timer" },\r
- { PropertyTypeTimer, "arm,armv8-timer" },\r
- { PropertyTypePsci, "arm,psci-0.2" },\r
- { PropertyTypeUnknown, "" }\r
+ { PropertyTypeGic, "arm,cortex-a15-gic" },\r
+ { PropertyTypeRtc, "arm,pl031" },\r
+ { PropertyTypeVirtio, "virtio,mmio" },\r
+ { PropertyTypeUart, "arm,pl011" },\r
+ { PropertyTypeTimer, "arm,armv7-timer" },\r
+ { PropertyTypeTimer, "arm,armv8-timer" },\r
+ { PropertyTypePsci, "arm,psci-0.2" },\r
+ { PropertyTypeFwCfg, "qemu,fw-cfg-mmio" },\r
+ { PropertyTypePciHost, "pci-host-ecam-generic" },\r
+ { PropertyTypeUnknown, "" }\r
};\r
\r
typedef struct {\r
return PropertyTypeUnknown;\r
}\r
\r
+//\r
+// We expect the "ranges" property of "pci-host-ecam-generic" to consist of\r
+// records like this.\r
+//\r
+#pragma pack (1)\r
+typedef struct {\r
+ UINT32 Type;\r
+ UINT64 ChildBase;\r
+ UINT64 CpuBase;\r
+ UINT64 Size;\r
+} DTB_PCI_HOST_RANGE_RECORD;\r
+#pragma pack ()\r
+\r
+#define DTB_PCI_HOST_RANGE_RELOCATABLE BIT31\r
+#define DTB_PCI_HOST_RANGE_PREFETCHABLE BIT30\r
+#define DTB_PCI_HOST_RANGE_ALIASED BIT29\r
+#define DTB_PCI_HOST_RANGE_MMIO32 BIT25\r
+#define DTB_PCI_HOST_RANGE_MMIO64 (BIT25 | BIT24)\r
+#define DTB_PCI_HOST_RANGE_IO BIT24\r
+#define DTB_PCI_HOST_RANGE_TYPEMASK (BIT31 | BIT30 | BIT29 | BIT25 | BIT24)\r
+\r
+/**\r
+ Process the device tree node describing the generic PCI host controller.\r
+\r
+ param[in] DeviceTreeBase Pointer to the device tree.\r
+\r
+ param[in] Node Offset of the device tree node whose "compatible"\r
+ property is "pci-host-ecam-generic".\r
+\r
+ param[in] RegProp Pointer to the "reg" property of Node. The caller\r
+ is responsible for ensuring that the size of the\r
+ property is 4 UINT32 cells.\r
+\r
+ @retval EFI_SUCCESS Parsing successful, properties parsed from Node\r
+ have been stored in dynamic PCDs.\r
+\r
+ @retval EFI_PROTOCOL_ERROR Parsing failed. PCDs are left unchanged.\r
+**/\r
+STATIC\r
+EFI_STATUS\r
+EFIAPI\r
+ProcessPciHost (\r
+ IN CONST VOID *DeviceTreeBase,\r
+ IN INT32 Node,\r
+ IN CONST VOID *RegProp\r
+ )\r
+{\r
+ UINT64 ConfigBase, ConfigSize;\r
+ CONST VOID *Prop;\r
+ INT32 Len;\r
+ UINT32 BusMin, BusMax;\r
+ UINT32 RecordIdx;\r
+ UINT64 IoBase, IoSize, IoTranslation;\r
+ UINT64 MmioBase, MmioSize, MmioTranslation;\r
+\r
+ //\r
+ // Fetch the ECAM window.\r
+ //\r
+ ConfigBase = fdt64_to_cpu (((CONST UINT64 *)RegProp)[0]);\r
+ ConfigSize = fdt64_to_cpu (((CONST UINT64 *)RegProp)[1]);\r
+\r
+ //\r
+ // Fetch the bus range (note: inclusive).\r
+ //\r
+ Prop = fdt_getprop (DeviceTreeBase, Node, "bus-range", &Len);\r
+ if (Prop == NULL || Len != 2 * sizeof(UINT32)) {\r
+ DEBUG ((EFI_D_ERROR, "%a: 'bus-range' not found or invalid\n",\r
+ __FUNCTION__));\r
+ return EFI_PROTOCOL_ERROR;\r
+ }\r
+ BusMin = fdt32_to_cpu (((CONST UINT32 *)Prop)[0]);\r
+ BusMax = fdt32_to_cpu (((CONST UINT32 *)Prop)[1]);\r
+\r
+ //\r
+ // Sanity check: the config space must accommodate all 4K register bytes of\r
+ // all 8 functions of all 32 devices of all buses.\r
+ //\r
+ if (BusMax < BusMin || BusMax - BusMin == MAX_UINT32 ||\r
+ DivU64x32 (ConfigSize, SIZE_4KB * 8 * 32) < BusMax - BusMin + 1) {\r
+ DEBUG ((EFI_D_ERROR, "%a: invalid 'bus-range' and/or 'reg'\n",\r
+ __FUNCTION__));\r
+ return EFI_PROTOCOL_ERROR;\r
+ }\r
+\r
+ //\r
+ // Iterate over "ranges".\r
+ //\r
+ Prop = fdt_getprop (DeviceTreeBase, Node, "ranges", &Len);\r
+ if (Prop == NULL || Len == 0 ||\r
+ Len % sizeof (DTB_PCI_HOST_RANGE_RECORD) != 0) {\r
+ DEBUG ((EFI_D_ERROR, "%a: 'ranges' not found or invalid\n", __FUNCTION__));\r
+ return EFI_PROTOCOL_ERROR;\r
+ }\r
+\r
+ //\r
+ // IoBase, IoTranslation, MmioBase and MmioTranslation are initialized only\r
+ // in order to suppress '-Werror=maybe-uninitialized' warnings *incorrectly*\r
+ // emitted by some gcc versions.\r
+ //\r
+ IoBase = 0;\r
+ IoTranslation = 0;\r
+ MmioBase = 0;\r
+ MmioTranslation = 0;\r
+\r
+ //\r
+ // IoSize and MmioSize are initialized to zero because the logic below\r
+ // requires it.\r
+ //\r
+ IoSize = 0;\r
+ MmioSize = 0;\r
+ for (RecordIdx = 0; RecordIdx < Len / sizeof (DTB_PCI_HOST_RANGE_RECORD);\r
+ ++RecordIdx) {\r
+ CONST DTB_PCI_HOST_RANGE_RECORD *Record;\r
+\r
+ Record = (CONST DTB_PCI_HOST_RANGE_RECORD *)Prop + RecordIdx;\r
+ switch (fdt32_to_cpu (Record->Type) & DTB_PCI_HOST_RANGE_TYPEMASK) {\r
+ case DTB_PCI_HOST_RANGE_IO:\r
+ IoBase = fdt64_to_cpu (Record->ChildBase);\r
+ IoSize = fdt64_to_cpu (Record->Size);\r
+ IoTranslation = fdt64_to_cpu (Record->CpuBase) - IoBase;\r
+ break;\r
+\r
+ case DTB_PCI_HOST_RANGE_MMIO32:\r
+ MmioBase = fdt64_to_cpu (Record->ChildBase);\r
+ MmioSize = fdt64_to_cpu (Record->Size);\r
+ MmioTranslation = fdt64_to_cpu (Record->CpuBase) - MmioBase;\r
+\r
+ if (MmioBase > MAX_UINT32 || MmioSize > MAX_UINT32 ||\r
+ MmioBase + MmioSize > SIZE_4GB) {\r
+ DEBUG ((EFI_D_ERROR, "%a: MMIO32 space invalid\n", __FUNCTION__));\r
+ return EFI_PROTOCOL_ERROR;\r
+ }\r
+\r
+ if (MmioTranslation != 0) {\r
+ DEBUG ((EFI_D_ERROR, "%a: unsupported nonzero MMIO32 translation "\r
+ "0x%Lx\n", __FUNCTION__, MmioTranslation));\r
+ return EFI_UNSUPPORTED;\r
+ }\r
+\r
+ break;\r
+ }\r
+ }\r
+ if (IoSize == 0 || MmioSize == 0) {\r
+ DEBUG ((EFI_D_ERROR, "%a: %a space empty\n", __FUNCTION__,\r
+ (IoSize == 0) ? "IO" : "MMIO32"));\r
+ return EFI_PROTOCOL_ERROR;\r
+ }\r
+\r
+ PcdSet64 (PcdPciExpressBaseAddress, ConfigBase);\r
+\r
+ PcdSet32 (PcdPciBusMin, BusMin);\r
+ PcdSet32 (PcdPciBusMax, BusMax);\r
+\r
+ PcdSet64 (PcdPciIoBase, IoBase);\r
+ PcdSet64 (PcdPciIoSize, IoSize);\r
+ PcdSet64 (PcdPciIoTranslation, IoTranslation);\r
+\r
+ PcdSet32 (PcdPciMmio32Base, (UINT32)MmioBase);\r
+ PcdSet32 (PcdPciMmio32Size, (UINT32)MmioSize);\r
+\r
+ PcdSetBool (PcdPciDisableBusEnumeration, FALSE);\r
+\r
+ DEBUG ((EFI_D_INFO, "%a: Config[0x%Lx+0x%Lx) Bus[0x%x..0x%x] "\r
+ "Io[0x%Lx+0x%Lx)@0x%Lx Mem[0x%Lx+0x%Lx)@0x%Lx\n", __FUNCTION__, ConfigBase,\r
+ ConfigSize, BusMin, BusMax, IoBase, IoSize, IoTranslation, MmioBase,\r
+ MmioSize, MmioTranslation));\r
+ return EFI_SUCCESS;\r
+}\r
+\r
+\r
EFI_STATUS\r
EFIAPI\r
InitializeVirtFdtDxe (\r
CONST INTERRUPT_PROPERTY *InterruptProp;\r
INT32 SecIntrNum, IntrNum, VirtIntrNum, HypIntrNum;\r
CONST CHAR8 *PsciMethod;\r
+ UINT64 FwCfgSelectorAddress;\r
+ UINT64 FwCfgSelectorSize;\r
+ UINT64 FwCfgDataAddress;\r
+ UINT64 FwCfgDataSize;\r
\r
DeviceTreeBase = (VOID *)(UINTN)PcdGet64 (PcdDeviceTreeBaseAddress);\r
ASSERT (DeviceTreeBase != NULL);\r
(PropType == PropertyTypePsci));\r
\r
switch (PropType) {\r
+ case PropertyTypePciHost:\r
+ ASSERT (Len == 2 * sizeof (UINT64));\r
+ Status = ProcessPciHost (DeviceTreeBase, Node, RegProp);\r
+ ASSERT_EFI_ERROR (Status);\r
+ break;\r
+\r
+ case PropertyTypeFwCfg:\r
+ ASSERT (Len == 2 * sizeof (UINT64));\r
+\r
+ FwCfgDataAddress = fdt64_to_cpu (((UINT64 *)RegProp)[0]);\r
+ FwCfgDataSize = 8;\r
+ FwCfgSelectorAddress = FwCfgDataAddress + FwCfgDataSize;\r
+ FwCfgSelectorSize = 2;\r
+\r
+ //\r
+ // The following ASSERT()s express\r
+ //\r
+ // Address + Size - 1 <= MAX_UINTN\r
+ //\r
+ // for both registers, that is, that the last byte in each MMIO range is\r
+ // expressible as a MAX_UINTN. The form below is mathematically\r
+ // equivalent, and it also prevents any unsigned overflow before the\r
+ // comparison.\r
+ //\r
+ ASSERT (FwCfgSelectorAddress <= MAX_UINTN - FwCfgSelectorSize + 1);\r
+ ASSERT (FwCfgDataAddress <= MAX_UINTN - FwCfgDataSize + 1);\r
+\r
+ PcdSet64 (PcdFwCfgSelectorAddress, FwCfgSelectorAddress);\r
+ PcdSet64 (PcdFwCfgDataAddress, FwCfgDataAddress);\r
+\r
+ DEBUG ((EFI_D_INFO, "Found FwCfg @ 0x%Lx/0x%Lx\n", FwCfgSelectorAddress,\r
+ FwCfgDataAddress));\r
+ break;\r
+\r
case PropertyTypeVirtio:\r
ASSERT (Len == 16);\r
//\r
break;\r
}\r
\r
- CopyMem (&DevicePath->Vendor.Guid, &gEfiCallerIdGuid, sizeof (EFI_GUID));\r
+ CopyMem (&DevicePath->Vendor.Guid, &gVirtioMmioTransportGuid,\r
+ sizeof (EFI_GUID));\r
DevicePath->PhysBase = RegBase;\r
SetDevicePathNodeLength (&DevicePath->Vendor,\r
sizeof (*DevicePath) - sizeof (DevicePath->End));\r
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