/** @file\r
- OVMF ACPI QEMU support\r
+ OVMF ACPI Xen support\r
\r
Copyright (c) 2008 - 2012, Intel Corporation. All rights reserved.<BR>\r
+ Copyright (c) 2012, Bei Guan <gbtju85@gmail.com>\r
+\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
#include "AcpiPlatform.h"\r
#include <Library/HobLib.h>\r
#include <Guid/XenInfo.h>\r
+#include <Library/BaseLib.h>\r
+\r
+#define XEN_ACPI_PHYSICAL_ADDRESS 0x000EA020\r
+#define XEN_BIOS_PHYSICAL_END 0x000FFFFF\r
\r
+EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *XenAcpiRsdpStructurePtr = NULL;\r
\r
+/**\r
+ This function detects if OVMF is running on Xen.\r
+\r
+**/\r
BOOLEAN\r
XenDetected (\r
VOID\r
return TRUE;\r
}\r
\r
+/**\r
+ Get the address of Xen ACPI Root System Description Pointer (RSDP)\r
+ structure.\r
+\r
+ @param RsdpStructurePtr Return pointer to RSDP structure\r
+\r
+ @return EFI_SUCCESS Find Xen RSDP structure successfully.\r
+ @return EFI_NOT_FOUND Don't find Xen RSDP structure.\r
+ @return EFI_ABORTED Find Xen RSDP structure, but it's not integrated.\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+GetXenAcpiRsdp (\r
+ OUT EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER **RsdpPtr\r
+ )\r
+{\r
+ EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *RsdpStructurePtr;\r
+ UINT8 *XenAcpiPtr;\r
+ UINT8 Sum;\r
+\r
+ //\r
+ // Detect the RSDP structure\r
+ //\r
+ for (XenAcpiPtr = (UINT8*)(UINTN) XEN_ACPI_PHYSICAL_ADDRESS;\r
+ XenAcpiPtr < (UINT8*)(UINTN) XEN_BIOS_PHYSICAL_END;\r
+ XenAcpiPtr += 0x10) {\r
+\r
+ RsdpStructurePtr = (EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *)\r
+ (UINTN) XenAcpiPtr;\r
+\r
+ if (!AsciiStrnCmp ((CHAR8 *) &RsdpStructurePtr->Signature, "RSD PTR ", 8)) {\r
+ //\r
+ // RSDP ACPI 1.0 checksum for 1.0/2.0/3.0 table.\r
+ // This is only the first 20 bytes of the structure\r
+ //\r
+ Sum = CalculateSum8 (\r
+ (CONST UINT8 *)RsdpStructurePtr,\r
+ sizeof (EFI_ACPI_1_0_ROOT_SYSTEM_DESCRIPTION_POINTER)\r
+ );\r
+ if (Sum != 0) {\r
+ return EFI_ABORTED;\r
+ }\r
+\r
+ if (RsdpStructurePtr->Revision >= 2) {\r
+ //\r
+ // RSDP ACPI 2.0/3.0 checksum, this is the entire table\r
+ //\r
+ Sum = CalculateSum8 (\r
+ (CONST UINT8 *)RsdpStructurePtr,\r
+ sizeof (EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER)\r
+ );\r
+ if (Sum != 0) {\r
+ return EFI_ABORTED;\r
+ }\r
+ }\r
+ *RsdpPtr = RsdpStructurePtr;\r
+ return EFI_SUCCESS;\r
+ }\r
+ }\r
+\r
+ return EFI_NOT_FOUND;\r
+}\r
+\r
+/**\r
+ Get Xen Acpi tables from the RSDP structure. And installs Xen ACPI tables\r
+ into the RSDT/XSDT using InstallAcpiTable. Some signature of the installed\r
+ ACPI tables are: FACP, APIC, HPET, WAET, SSDT, FACS, DSDT.\r
\r
+ @param AcpiProtocol Protocol instance pointer.\r
+\r
+ @return EFI_SUCCESS The table was successfully inserted.\r
+ @return EFI_INVALID_PARAMETER Either AcpiTableBuffer is NULL, TableHandle is\r
+ NULL, or AcpiTableBufferSize and the size\r
+ field embedded in the ACPI table pointed to\r
+ by AcpiTableBuffer are not in sync.\r
+ @return EFI_OUT_OF_RESOURCES Insufficient resources exist to complete the request.\r
+\r
+**/\r
EFI_STATUS\r
EFIAPI\r
-XenInstallAcpiTable (\r
- IN EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol,\r
- IN VOID *AcpiTableBuffer,\r
- IN UINTN AcpiTableBufferSize,\r
- OUT UINTN *TableKey\r
+InstallXenTables (\r
+ IN EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol\r
)\r
{\r
- return InstallAcpiTable(\r
- AcpiProtocol,\r
- AcpiTableBuffer,\r
- AcpiTableBufferSize,\r
- TableKey\r
- );\r
+ EFI_STATUS Status;\r
+ UINTN TableHandle;\r
+\r
+ EFI_ACPI_DESCRIPTION_HEADER *Rsdt;\r
+ EFI_ACPI_DESCRIPTION_HEADER *Xsdt;\r
+ VOID *CurrentTableEntry;\r
+ UINTN CurrentTablePointer;\r
+ EFI_ACPI_DESCRIPTION_HEADER *CurrentTable;\r
+ UINTN Index;\r
+ UINTN NumberOfTableEntries;\r
+ EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *Fadt2Table;\r
+ EFI_ACPI_1_0_FIXED_ACPI_DESCRIPTION_TABLE *Fadt1Table;\r
+ EFI_ACPI_2_0_FIRMWARE_ACPI_CONTROL_STRUCTURE *Facs2Table;\r
+ EFI_ACPI_1_0_FIRMWARE_ACPI_CONTROL_STRUCTURE *Facs1Table;\r
+ EFI_ACPI_DESCRIPTION_HEADER *DsdtTable;\r
+\r
+ Fadt2Table = NULL;\r
+ Fadt1Table = NULL;\r
+ Facs2Table = NULL;\r
+ Facs1Table = NULL;\r
+ DsdtTable = NULL;\r
+ TableHandle = 0;\r
+ NumberOfTableEntries = 0;\r
+\r
+ //\r
+ // Try to find Xen ACPI tables\r
+ //\r
+ Status = GetXenAcpiRsdp (&XenAcpiRsdpStructurePtr);\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+\r
+ //\r
+ // If XSDT table is find, just install its tables. \r
+ // Otherwise, try to find and install the RSDT tables.\r
+ //\r
+ if (XenAcpiRsdpStructurePtr->XsdtAddress) {\r
+ //\r
+ // Retrieve the addresses of XSDT and \r
+ // calculate the number of its table entries.\r
+ //\r
+ Xsdt = (EFI_ACPI_DESCRIPTION_HEADER *) (UINTN)\r
+ XenAcpiRsdpStructurePtr->XsdtAddress;\r
+ NumberOfTableEntries = (Xsdt->Length -\r
+ sizeof (EFI_ACPI_DESCRIPTION_HEADER)) /\r
+ sizeof (UINT64);\r
+\r
+ //\r
+ // Install ACPI tables found in XSDT.\r
+ //\r
+ for (Index = 0; Index < NumberOfTableEntries; Index++) {\r
+ //\r
+ // Get the table entry from XSDT\r
+ //\r
+ CurrentTableEntry = (VOID *) ((UINT8 *) Xsdt +\r
+ sizeof (EFI_ACPI_DESCRIPTION_HEADER) +\r
+ Index * sizeof (UINT64));\r
+ CurrentTablePointer = (UINTN) *(UINT64 *)CurrentTableEntry;\r
+ CurrentTable = (EFI_ACPI_DESCRIPTION_HEADER *) CurrentTablePointer;\r
+\r
+ //\r
+ // Install the XSDT tables\r
+ //\r
+ Status = InstallAcpiTable (\r
+ AcpiProtocol,\r
+ CurrentTable,\r
+ CurrentTable->Length,\r
+ &TableHandle\r
+ );\r
+\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+\r
+ //\r
+ // Get the FACS and DSDT table address from the table FADT\r
+ //\r
+ if (!AsciiStrnCmp ((CHAR8 *) &CurrentTable->Signature, "FACP", 4)) {\r
+ Fadt2Table = (EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *)\r
+ (UINTN) CurrentTablePointer;\r
+ Facs2Table = (EFI_ACPI_2_0_FIRMWARE_ACPI_CONTROL_STRUCTURE *)\r
+ (UINTN) Fadt2Table->FirmwareCtrl;\r
+ DsdtTable = (EFI_ACPI_DESCRIPTION_HEADER *) (UINTN) Fadt2Table->Dsdt;\r
+ }\r
+ }\r
+ }\r
+ else if (XenAcpiRsdpStructurePtr->RsdtAddress) {\r
+ //\r
+ // Retrieve the addresses of RSDT and\r
+ // calculate the number of its table entries.\r
+ //\r
+ Rsdt = (EFI_ACPI_DESCRIPTION_HEADER *) (UINTN)\r
+ XenAcpiRsdpStructurePtr->RsdtAddress;\r
+ NumberOfTableEntries = (Rsdt->Length -\r
+ sizeof (EFI_ACPI_DESCRIPTION_HEADER)) / \r
+ sizeof (UINT32);\r
+\r
+ //\r
+ // Install ACPI tables found in XSDT.\r
+ //\r
+ for (Index = 0; Index < NumberOfTableEntries; Index++) {\r
+ //\r
+ // Get the table entry from RSDT\r
+ //\r
+ CurrentTableEntry = (UINT32 *) ((UINT8 *) Rsdt +\r
+ sizeof (EFI_ACPI_DESCRIPTION_HEADER) +\r
+ Index * sizeof (UINT32));\r
+ CurrentTablePointer = *(UINT32 *)CurrentTableEntry;\r
+ CurrentTable = (EFI_ACPI_DESCRIPTION_HEADER *) CurrentTablePointer;\r
+\r
+ //\r
+ // Install the RSDT tables\r
+ //\r
+ Status = InstallAcpiTable (\r
+ AcpiProtocol,\r
+ CurrentTable,\r
+ CurrentTable->Length,\r
+ &TableHandle\r
+ );\r
+\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+\r
+ //\r
+ // Get the FACS and DSDT table address from the table FADT\r
+ //\r
+ if (!AsciiStrnCmp ((CHAR8 *) &CurrentTable->Signature, "FACP", 4)) {\r
+ Fadt1Table = (EFI_ACPI_1_0_FIXED_ACPI_DESCRIPTION_TABLE *)\r
+ (UINTN) CurrentTablePointer;\r
+ Facs1Table = (EFI_ACPI_1_0_FIRMWARE_ACPI_CONTROL_STRUCTURE *)\r
+ (UINTN) Fadt1Table->FirmwareCtrl;\r
+ DsdtTable = (EFI_ACPI_DESCRIPTION_HEADER *) (UINTN) Fadt1Table->Dsdt;\r
+ }\r
+ }\r
+ }\r
+\r
+ //\r
+ // Install the FACS table.\r
+ //\r
+ if (Fadt2Table) {\r
+ //\r
+ // FACS 2.0\r
+ //\r
+ Status = InstallAcpiTable (\r
+ AcpiProtocol,\r
+ Facs2Table,\r
+ Facs2Table->Length,\r
+ &TableHandle\r
+ );\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+ }\r
+ else if (Fadt1Table) {\r
+ //\r
+ // FACS 1.0\r
+ //\r
+ Status = InstallAcpiTable (\r
+ AcpiProtocol,\r
+ Facs1Table,\r
+ Facs1Table->Length,\r
+ &TableHandle\r
+ );\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+ }\r
+\r
+ //\r
+ // Install DSDT table.\r
+ //\r
+ Status = InstallAcpiTable (\r
+ AcpiProtocol,\r
+ DsdtTable,\r
+ DsdtTable->Length,\r
+ &TableHandle\r
+ );\r
+ if (EFI_ERROR (Status)) {\r
+ return Status;\r
+ }\r
+\r
+ return EFI_SUCCESS;\r
}\r
\r
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