[mirror_edk2.git] / OvmfPkg / AcpiPlatformDxe / Xen.c

/** @file\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
  http://opensource.org/licenses/bsd-license.php\r
\r
  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/ \r
\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
  )\r
{\r
  EFI_HOB_GUID_TYPE         *GuidHob;\r
\r
  //\r
  // See if a XenInfo HOB is available\r
  //\r
  GuidHob = GetFirstGuidHob (&gEfiXenInfoGuid);\r
  if (GuidHob == NULL) {\r
    return FALSE;\r
  }\r
\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
InstallXenTables (\r
  IN   EFI_ACPI_TABLE_PROTOCOL       *AcpiProtocol\r
  )\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
Commit	Line	Data
522203de	1	/** @file\r
377e758c	2	OVMF ACPI Xen support\r
522203de	3	\r
522203de	4	Copyright (c) 2008 - 2012, Intel Corporation. All rights reserved.<BR>\r
377e758c	5	Copyright (c) 2012, Bei Guan <gbtju85@gmail.com>\r
377e758c	6	\r
522203de	7	This program and the accompanying materials\r
	8	are licensed and made available under the terms and conditions of the BSD License\r
	9	which accompanies this distribution. The full text of the license may be found at\r
	10	http://opensource.org/licenses/bsd-license.php\r
	11	\r
	12	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	13	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	14	\r
	15	**/ \r
	16	\r
	17	#include "AcpiPlatform.h"\r
	18	#include <Library/HobLib.h>\r
	19	#include <Guid/XenInfo.h>\r
4804ef49	20	#include <Library/BaseLib.h>\r
522203de	21	\r
377e758c	22	#define XEN_ACPI_PHYSICAL_ADDRESS 0x000EA020\r
	23	#define XEN_BIOS_PHYSICAL_END 0x000FFFFF\r
	24	\r
	25	EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *XenAcpiRsdpStructurePtr = NULL;\r
	26	\r
377e758c	27	/**\r
377e758c	28	This function detects if OVMF is running on Xen.\r
522203de	29	\r
377e758c	30	**/\r
522203de	31	BOOLEAN\r
	32	XenDetected (\r
	33	VOID\r
	34	)\r
	35	{\r
	36	EFI_HOB_GUID_TYPE *GuidHob;\r
	37	\r
	38	//\r
	39	// See if a XenInfo HOB is available\r
	40	//\r
	41	GuidHob = GetFirstGuidHob (&gEfiXenInfoGuid);\r
	42	if (GuidHob == NULL) {\r
	43	return FALSE;\r
	44	}\r
	45	\r
	46	return TRUE;\r
	47	}\r
	48	\r
377e758c	49	/**\r
	50	Get the address of Xen ACPI Root System Description Pointer (RSDP)\r
	51	structure.\r
522203de	52	\r
377e758c	53	@param RsdpStructurePtr Return pointer to RSDP structure\r
	54	\r
	55	@return EFI_SUCCESS Find Xen RSDP structure successfully.\r
	56	@return EFI_NOT_FOUND Don't find Xen RSDP structure.\r
	57	@return EFI_ABORTED Find Xen RSDP structure, but it's not integrated.\r
	58	\r
	59	**/\r
522203de	60	EFI_STATUS\r
522203de	61	EFIAPI\r
377e758c	62	GetXenAcpiRsdp (\r
377e758c	63	OUT EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER **RsdpPtr\r
522203de	64	)\r
522203de	65	{\r
377e758c	66	EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *RsdpStructurePtr;\r
	67	UINT8 *XenAcpiPtr;\r
	68	UINT8 Sum;\r
	69	\r
	70	//\r
	71	// Detect the RSDP structure\r
	72	//\r
	73	for (XenAcpiPtr = (UINT8*)(UINTN) XEN_ACPI_PHYSICAL_ADDRESS;\r
	74	XenAcpiPtr < (UINT8*)(UINTN) XEN_BIOS_PHYSICAL_END;\r
	75	XenAcpiPtr += 0x10) {\r
	76	\r
	77	RsdpStructurePtr = (EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER *)\r
	78	(UINTN) XenAcpiPtr;\r
	79	\r
	80	if (!AsciiStrnCmp ((CHAR8 *) &RsdpStructurePtr->Signature, "RSD PTR ", 8)) {\r
	81	//\r
	82	// RSDP ACPI 1.0 checksum for 1.0/2.0/3.0 table.\r
	83	// This is only the first 20 bytes of the structure\r
	84	//\r
4804ef49	85	Sum = CalculateSum8 (\r
4804ef49	86	(CONST UINT8 *)RsdpStructurePtr,\r
377e758c	87	sizeof (EFI_ACPI_1_0_ROOT_SYSTEM_DESCRIPTION_POINTER)\r
	88	);\r
	89	if (Sum != 0) {\r
	90	return EFI_ABORTED;\r
	91	}\r
	92	\r
	93	if (RsdpStructurePtr->Revision >= 2) {\r
	94	//\r
	95	// RSDP ACPI 2.0/3.0 checksum, this is the entire table\r
	96	//\r
4804ef49	97	Sum = CalculateSum8 (\r
4804ef49	98	(CONST UINT8 *)RsdpStructurePtr,\r
377e758c	99	sizeof (EFI_ACPI_2_0_ROOT_SYSTEM_DESCRIPTION_POINTER)\r
	100	);\r
	101	if (Sum != 0) {\r
	102	return EFI_ABORTED;\r
	103	}\r
	104	}\r
	105	*RsdpPtr = RsdpStructurePtr;\r
	106	return EFI_SUCCESS;\r
	107	}\r
	108	}\r
	109	\r
	110	return EFI_NOT_FOUND;\r
	111	}\r
	112	\r
	113	/**\r
	114	Get Xen Acpi tables from the RSDP structure. And installs Xen ACPI tables\r
	115	into the RSDT/XSDT using InstallAcpiTable. Some signature of the installed\r
	116	ACPI tables are: FACP, APIC, HPET, WAET, SSDT, FACS, DSDT.\r
	117	\r
	118	@param AcpiProtocol Protocol instance pointer.\r
	119	\r
	120	@return EFI_SUCCESS The table was successfully inserted.\r
	121	@return EFI_INVALID_PARAMETER Either AcpiTableBuffer is NULL, TableHandle is\r
	122	NULL, or AcpiTableBufferSize and the size\r
	123	field embedded in the ACPI table pointed to\r
	124	by AcpiTableBuffer are not in sync.\r
	125	@return EFI_OUT_OF_RESOURCES Insufficient resources exist to complete the request.\r
	126	\r
	127	**/\r
	128	EFI_STATUS\r
	129	EFIAPI\r
	130	InstallXenTables (\r
	131	IN EFI_ACPI_TABLE_PROTOCOL *AcpiProtocol\r
	132	)\r
	133	{\r
	134	EFI_STATUS Status;\r
	135	UINTN TableHandle;\r
	136	\r
	137	EFI_ACPI_DESCRIPTION_HEADER *Rsdt;\r
	138	EFI_ACPI_DESCRIPTION_HEADER *Xsdt;\r
	139	VOID *CurrentTableEntry;\r
	140	UINTN CurrentTablePointer;\r
	141	EFI_ACPI_DESCRIPTION_HEADER *CurrentTable;\r
	142	UINTN Index;\r
	143	UINTN NumberOfTableEntries;\r
	144	EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *Fadt2Table;\r
	145	EFI_ACPI_1_0_FIXED_ACPI_DESCRIPTION_TABLE *Fadt1Table;\r
	146	EFI_ACPI_2_0_FIRMWARE_ACPI_CONTROL_STRUCTURE *Facs2Table;\r
	147	EFI_ACPI_1_0_FIRMWARE_ACPI_CONTROL_STRUCTURE *Facs1Table;\r
	148	EFI_ACPI_DESCRIPTION_HEADER *DsdtTable;\r
	149	\r
	150	Fadt2Table = NULL;\r
	151	Fadt1Table = NULL;\r
	152	Facs2Table = NULL;\r
	153	Facs1Table = NULL;\r
	154	DsdtTable = NULL;\r
	155	TableHandle = 0;\r
	156	NumberOfTableEntries = 0;\r
	157	\r
	158	//\r
	159	// Try to find Xen ACPI tables\r
	160	//\r
	161	Status = GetXenAcpiRsdp (&XenAcpiRsdpStructurePtr);\r
	162	if (EFI_ERROR (Status)) {\r
163	return Status;\r
164	}\r
165	\r
166	//\r
167	// If XSDT table is find, just install its tables. \r
168	// Otherwise, try to find and install the RSDT tables.\r
169	//\r
170	if (XenAcpiRsdpStructurePtr->XsdtAddress) {\r
171	//\r
172	// Retrieve the addresses of XSDT and \r
173	// calculate the number of its table entries.\r
174	//\r
175	Xsdt = (EFI_ACPI_DESCRIPTION_HEADER *) (UINTN)\r
176	XenAcpiRsdpStructurePtr->XsdtAddress;\r
177	NumberOfTableEntries = (Xsdt->Length -\r
178	sizeof (EFI_ACPI_DESCRIPTION_HEADER)) /\r
179	sizeof (UINT64);\r
180	\r
181	//\r
182	// Install ACPI tables found in XSDT.\r
183	//\r
184	for (Index = 0; Index < NumberOfTableEntries; Index++) {\r
185	//\r
186	// Get the table entry from XSDT\r
187	//\r
188	CurrentTableEntry = (VOID ) ((UINT8 ) Xsdt +\r
189	sizeof (EFI_ACPI_DESCRIPTION_HEADER) +\r
190	Index * sizeof (UINT64));\r
26af9aca	191	CurrentTablePointer = (UINTN) (UINT64 )CurrentTableEntry;\r
377e758c	192	CurrentTable = (EFI_ACPI_DESCRIPTION_HEADER *) CurrentTablePointer;\r
	193	\r
	194	//\r
	195	// Install the XSDT tables\r
	196	//\r
	197	Status = InstallAcpiTable (\r
	198	AcpiProtocol,\r
	199	CurrentTable,\r
	200	CurrentTable->Length,\r
	201	&TableHandle\r
	202	);\r
	203	\r
	204	if (EFI_ERROR (Status)) {\r
	205	return Status;\r
	206	}\r
	207	\r
	208	//\r
	209	// Get the FACS and DSDT table address from the table FADT\r
	210	//\r
	211	if (!AsciiStrnCmp ((CHAR8 *) &CurrentTable->Signature, "FACP", 4)) {\r
	212	Fadt2Table = (EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *)\r
	213	(UINTN) CurrentTablePointer;\r
	214	Facs2Table = (EFI_ACPI_2_0_FIRMWARE_ACPI_CONTROL_STRUCTURE *)\r
	215	(UINTN) Fadt2Table->FirmwareCtrl;\r
	216	DsdtTable = (EFI_ACPI_DESCRIPTION_HEADER *) (UINTN) Fadt2Table->Dsdt;\r
	217	}\r
	218	}\r
	219	}\r
	220	else if (XenAcpiRsdpStructurePtr->RsdtAddress) {\r
	221	//\r
	222	// Retrieve the addresses of RSDT and\r
	223	// calculate the number of its table entries.\r
	224	//\r
	225	Rsdt = (EFI_ACPI_DESCRIPTION_HEADER *) (UINTN)\r
	226	XenAcpiRsdpStructurePtr->RsdtAddress;\r
	227	NumberOfTableEntries = (Rsdt->Length -\r
	228	sizeof (EFI_ACPI_DESCRIPTION_HEADER)) / \r
	229	sizeof (UINT32);\r
	230	\r
	231	//\r
	232	// Install ACPI tables found in XSDT.\r
	233	//\r
	234	for (Index = 0; Index < NumberOfTableEntries; Index++) {\r
	235	//\r
	236	// Get the table entry from RSDT\r
	237	//\r
	238	CurrentTableEntry = (UINT32 ) ((UINT8 ) Rsdt +\r
	239	sizeof (EFI_ACPI_DESCRIPTION_HEADER) +\r
	240	Index * sizeof (UINT32));\r
	241	CurrentTablePointer = (UINT32 )CurrentTableEntry;\r
	242	CurrentTable = (EFI_ACPI_DESCRIPTION_HEADER *) CurrentTablePointer;\r
	243	\r
	244	//\r
	245	// Install the RSDT tables\r
	246	//\r
	247	Status = InstallAcpiTable (\r
	248	AcpiProtocol,\r
	249	CurrentTable,\r
	250	CurrentTable->Length,\r
	251	&TableHandle\r
	252	);\r
	253	\r
	254	if (EFI_ERROR (Status)) {\r
	255	return Status;\r
256	}\r
257	\r
258	//\r
259	// Get the FACS and DSDT table address from the table FADT\r
260	//\r
261	if (!AsciiStrnCmp ((CHAR8 *) &CurrentTable->Signature, "FACP", 4)) {\r
262	Fadt1Table = (EFI_ACPI_1_0_FIXED_ACPI_DESCRIPTION_TABLE *)\r
263	(UINTN) CurrentTablePointer;\r
264	Facs1Table = (EFI_ACPI_1_0_FIRMWARE_ACPI_CONTROL_STRUCTURE *)\r
265	(UINTN) Fadt1Table->FirmwareCtrl;\r
266	DsdtTable = (EFI_ACPI_DESCRIPTION_HEADER *) (UINTN) Fadt1Table->Dsdt;\r
267	}\r
268	}\r
269	}\r
270	\r
271	//\r
272	// Install the FACS table.\r
273	//\r
274	if (Fadt2Table) {\r
275	//\r
276	// FACS 2.0\r
277	//\r
278	Status = InstallAcpiTable (\r
279	AcpiProtocol,\r
280	Facs2Table,\r
281	Facs2Table->Length,\r
282	&TableHandle\r
283	);\r
284	if (EFI_ERROR (Status)) {\r
285	return Status;\r
286	}\r
287	}\r
288	else if (Fadt1Table) {\r
289	//\r
290	// FACS 1.0\r
291	//\r
292	Status = InstallAcpiTable (\r
293	AcpiProtocol,\r
294	Facs1Table,\r
295	Facs1Table->Length,\r
296	&TableHandle\r
297	);\r
298	if (EFI_ERROR (Status)) {\r
299	return Status;\r
300	}\r
301	}\r
302	\r
303	//\r
304	// Install DSDT table.\r
305	//\r
306	Status = InstallAcpiTable (\r
307	AcpiProtocol,\r
308	DsdtTable,\r
309	DsdtTable->Length,\r
310	&TableHandle\r
311	);\r
312	if (EFI_ERROR (Status)) {\r
313	return Status;\r
314	}\r
315	\r
316	return EFI_SUCCESS;\r
522203de	317	}\r
522203de	318	\r