[mirror_edk2.git] / EdkCompatibilityPkg / Compatibility / PciCfgToPciCfg2Thunk / PciCfgToPciCfg2Thunk.c

/**\r
Module produce PciCfgPpi on top of PciCfgPpi2.\r
\r
PIWG's PI specification replaces Inte's EFI Specification 1.10.\r
EFI_PEI_PCI_CFG_PPI defined in Inte's EFI Specification 1.10 is replaced by\r
EFI_PEI_PCI_CFG2_PPI in PI 1.0.\r
This module produces PciCfgPpi on top of PciCfgPpi2. This module is used on platform when both of\r
these two conditions are true:\r
1) Framework module is present that consumes PCI CFG  AND\r
2) R9 module is present that produces PCI CFG2 but not PCI CFG\r
\r
\r
Copyright (c) 2006 - 2008 Intel Corporation. <BR>\r
All rights reserved. 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
Module Name:\r
**/\r
\r
#include <PiPei.h>\r
#include <Ppi/PciCfg.h>\r
#include <Ppi/PciCfg2.h>\r
#include <Library/DebugLib.h>\r
\r
//\r
// Function Prototypes\r
//\r
\r
/**\r
  Reads from a given location in the PCI configuration space.\r
\r
  @param  PeiServices                   An indirect pointer to the PEI Services Table published by the PEI Foundation.\r
\r
  @param  This                              Pointer to local data for the interface.\r
\r
  @param  Width                           The width of the access. Enumerated in bytes.\r
                                                   See EFI_PEI_PCI_CFG_PPI_WIDTH above.\r
\r
  @param  Address                       The physical address of the access. The format of\r
                                                  the address is described by EFI_PEI_PCI_CFG_PPI_PCI_ADDRESS.\r
\r
  @param  Buffer                           A pointer to the buffer of data..\r
\r
\r
  @retval EFI_SUCCESS                 The function completed successfully.\r
\r
  @retval EFI_DEVICE_ERROR        There was a problem with the transaction.\r
\r
  @retval EFI_DEVICE_NOT_READY  The device is not capable of supporting the operation at this\r
                                                    time.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
PciCfgRead (\r
  IN EFI_PEI_SERVICES             **PeiServices,\r
  IN EFI_PEI_PCI_CFG_PPI          *This,\r
  IN EFI_PEI_PCI_CFG_PPI_WIDTH    Width,\r
  IN UINT64                       Address,\r
  IN OUT VOID                     *Buffer\r
  );\r
\r
/**\r
  Write to a given location in the PCI configuration space.\r
\r
  @param  PeiServices                   An indirect pointer to the PEI Services Table published by the PEI Foundation.\r
\r
  @param  This                              Pointer to local data for the interface.\r
\r
  @param  Width                            The width of the access. Enumerated in bytes.\r
                                                    See EFI_PEI_PCI_CFG_PPI_WIDTH above.\r
\r
  @param  Address                         The physical address of the access. The format of\r
                                                    the address is described by EFI_PEI_PCI_CFG_PPI_PCI_ADDRESS.\r
\r
  @param  Buffer                            A pointer to the buffer of data..\r
\r
\r
  @retval EFI_SUCCESS                   The function completed successfully.\r
\r
  @retval EFI_DEVICE_ERROR          There was a problem with the transaction.\r
\r
  @retval EFI_DEVICE_NOT_READY  The device is not capable of supporting the operation at this\r
                                                     time.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
PciCfgWrite (\r
  IN EFI_PEI_SERVICES             **PeiServices,\r
  IN EFI_PEI_PCI_CFG_PPI          *This,\r
  IN EFI_PEI_PCI_CFG_PPI_WIDTH    Width,\r
  IN UINT64                       Address,\r
  IN OUT VOID                     *Buffer\r
  );\r
\r
/**\r
  PCI read-modify-write operation.\r
\r
  @param  PeiServices                     An indirect pointer to the PEI Services Table\r
                                                      published by the PEI Foundation.\r
\r
  @param  This                                Pointer to local data for the interface.\r
\r
  @param  Width                             The width of the access. Enumerated in bytes. Type\r
                                                      EFI_PEI_PCI_CFG_PPI_WIDTH is defined in Read().\r
\r
  @param  Address                           The physical address of the access.\r
\r
  @param  SetBits                            Points to value to bitwise-OR with the read configuration value.\r
                                                      The size of the value is determined by Width.\r
\r
  @param  ClearBits                         Points to the value to negate and bitwise-AND with the read configuration value.\r
                                                      The size of the value is determined by Width.\r
\r
\r
  @retval EFI_SUCCESS                   The function completed successfully.\r
\r
  @retval EFI_DEVICE_ERROR          There was a problem with the transaction.\r
\r
  @retval EFI_DEVICE_NOT_READY  The device is not capable of supporting\r
                                                    the operation at this time.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
PciCfgModify (\r
  IN EFI_PEI_SERVICES             **PeiServices,\r
  IN EFI_PEI_PCI_CFG_PPI          *This,\r
  IN EFI_PEI_PCI_CFG_PPI_WIDTH    Width,\r
  IN UINT64                       Address,\r
  IN UINTN                        SetBits,\r
  IN UINTN                        ClearBits\r
  );\r
\r
//\r
// Module globals\r
//\r
EFI_PEI_PCI_CFG_PPI mPciCfgPpi = {\r
  PciCfgRead,\r
  PciCfgWrite,\r
  PciCfgModify,\r
};\r
\r
EFI_PEI_PPI_DESCRIPTOR     mPpiListPciCfg = {\r
  (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),\r
  &gEfiPciCfgPpiInServiceTableGuid,\r
  &mPciCfgPpi\r
};\r
\r
/**\r
\r
  Standard PEIM entry point.\r
\r
  @param FfsHeadher   The FFS file header\r
  @param PeiServices   General purpose services available to every PEIM.\r
\r
\r
  @retval EFI_SUCCESS if the interface could be successfully\r
                                    installed\r
\r
--*/\r
EFI_STATUS\r
EFIAPI\r
PeimInitializePciCfg (\r
  IN EFI_PEI_FILE_HANDLE     FfsHeader,\r
  IN CONST EFI_PEI_SERVICES  **PeiServices\r
  )\r
{\r
  //\r
  // Publish the PciCfgToPciCfg2 Thunk capability to other modules\r
  //\r
  return (*PeiServices)->InstallPpi (PeiServices, &mPpiListPciCfg);\r
}\r
\r
/**\r
  Reads from a given location in the PCI configuration space.\r
\r
  @param  PeiServices                   An indirect pointer to the PEI Services Table published by the PEI Foundation.\r
\r
  @param  This                              Pointer to local data for the interface.\r
\r
  @param  Width                           The width of the access. Enumerated in bytes.\r
                                                   See EFI_PEI_PCI_CFG_PPI_WIDTH above.\r
\r
  @param  Address                       The physical address of the access. The format of\r
                                                  the address is described by EFI_PEI_PCI_CFG_PPI_PCI_ADDRESS.\r
\r
  @param  Buffer                           A pointer to the buffer of data..\r
\r
\r
  @retval EFI_SUCCESS                 The function completed successfully.\r
\r
  @retval EFI_DEVICE_ERROR        There was a problem with the transaction.\r
\r
  @retval EFI_DEVICE_NOT_READY  The device is not capable of supporting the operation at this\r
                                                    time.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
PciCfgRead (\r
  IN EFI_PEI_SERVICES             **PeiServices,\r
  IN EFI_PEI_PCI_CFG_PPI          *This,\r
  IN EFI_PEI_PCI_CFG_PPI_WIDTH    Width,\r
  IN UINT64                       Address,\r
  IN OUT VOID                     *Buffer\r
  )\r
{\r
  EFI_PEI_PCI_CFG2_PPI  *PciCfg2;\r
\r
  PciCfg2 = (*PeiServices)->PciCfg;\r
\r
  return PciCfg2->Read ((CONST EFI_PEI_SERVICES **)PeiServices, PciCfg2, Width, Address, Buffer);\r
}\r
\r
\r
/**\r
  Write to a given location in the PCI configuration space.\r
\r
  @param  PeiServices                   An indirect pointer to the PEI Services Table published by the PEI Foundation.\r
\r
  @param  This                              Pointer to local data for the interface.\r
\r
  @param  Width                            The width of the access. Enumerated in bytes.\r
                                                    See EFI_PEI_PCI_CFG_PPI_WIDTH above.\r
\r
  @param  Address                         The physical address of the access. The format of\r
                                                    the address is described by EFI_PEI_PCI_CFG_PPI_PCI_ADDRESS.\r
\r
  @param  Buffer                            A pointer to the buffer of data..\r
\r
\r
  @retval EFI_SUCCESS                   The function completed successfully.\r
\r
  @retval EFI_DEVICE_ERROR          There was a problem with the transaction.\r
\r
  @retval EFI_DEVICE_NOT_READY  The device is not capable of supporting the operation at this\r
                                                     time.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
PciCfgWrite (\r
  IN EFI_PEI_SERVICES             **PeiServices,\r
  IN EFI_PEI_PCI_CFG_PPI          *This,\r
  IN EFI_PEI_PCI_CFG_PPI_WIDTH    Width,\r
  IN UINT64                       Address,\r
  IN OUT VOID                     *Buffer\r
  )\r
{\r
  EFI_PEI_PCI_CFG2_PPI  *PciCfg2;\r
\r
  PciCfg2 = (*PeiServices)->PciCfg;\r
\r
  return PciCfg2->Write ((CONST EFI_PEI_SERVICES **)PeiServices, PciCfg2, Width, Address, Buffer);\r
}\r
\r
/**\r
  PCI read-modify-write operation.\r
\r
  @param  PeiServices                     An indirect pointer to the PEI Services Table\r
                                                      published by the PEI Foundation.\r
\r
  @param  This                                Pointer to local data for the interface.\r
\r
  @param  Width                             The width of the access. Enumerated in bytes. Type\r
                                                      EFI_PEI_PCI_CFG_PPI_WIDTH is defined in Read().\r
\r
  @param  Address                           The physical address of the access.\r
\r
  @param  SetBits                            Points to value to bitwise-OR with the read configuration value.\r
                                                      The size of the value is determined by Width.\r
\r
  @param  ClearBits                         Points to the value to negate and bitwise-AND with the read configuration value.\r
                                                      The size of the value is determined by Width.\r
\r
\r
  @retval EFI_SUCCESS                   The function completed successfully.\r
\r
  @retval EFI_DEVICE_ERROR          There was a problem with the transaction.\r
\r
  @retval EFI_DEVICE_NOT_READY  The device is not capable of supporting\r
                                                    the operation at this time.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
PciCfgModify (\r
  IN EFI_PEI_SERVICES             **PeiServices,\r
  IN EFI_PEI_PCI_CFG_PPI          *This,\r
  IN EFI_PEI_PCI_CFG_PPI_WIDTH    Width,\r
  IN UINT64                       Address,\r
  IN UINTN                        SetBits,\r
  IN UINTN                        ClearBits\r
  )\r
{\r
  EFI_PEI_PCI_CFG2_PPI  *PciCfg2;\r
\r
  PciCfg2 = (*PeiServices)->PciCfg;\r
\r
  return PciCfg2->Modify ((CONST EFI_PEI_SERVICES **)PeiServices, PciCfg2, Width, Address, &SetBits, &ClearBits);\r
}\r
Commit	Line	Data
d79eed91	1	/**\r
	2	Module produce PciCfgPpi on top of PciCfgPpi2.\r
	3	\r
	4	PIWG's PI specification replaces Inte's EFI Specification 1.10.\r
	5	EFI_PEI_PCI_CFG_PPI defined in Inte's EFI Specification 1.10 is replaced by\r
	6	EFI_PEI_PCI_CFG2_PPI in PI 1.0.\r
	7	This module produces PciCfgPpi on top of PciCfgPpi2. This module is used on platform when both of\r
	8	these two conditions are true:\r
	9	1) Framework module is present that consumes PCI CFG AND\r
	10	2) R9 module is present that produces PCI CFG2 but not PCI CFG\r
	11	\r
4259256b	12	\r
	13	Copyright (c) 2006 - 2008 Intel Corporation. <BR>\r
	14	All rights reserved. This program and the accompanying materials\r
	15	are licensed and made available under the terms and conditions of the BSD License\r
	16	which accompanies this distribution. The full text of the license may be found at\r
	17	http://opensource.org/licenses/bsd-license.php\r
	18	\r
	19	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	20	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	21	Module Name:\r
d79eed91	22	**/\r
4259256b	23	\r
	24	#include <PiPei.h>\r
	25	#include <Ppi/PciCfg.h>\r
	26	#include <Ppi/PciCfg2.h>\r
	27	#include <Library/DebugLib.h>\r
	28	\r
	29	//\r
	30	// Function Prototypes\r
	31	//\r
d79eed91	32	\r
	33	/**\r
	34	Reads from a given location in the PCI configuration space.\r
	35	\r
	36	@param PeiServices An indirect pointer to the PEI Services Table published by the PEI Foundation.\r
	37	\r
	38	@param This Pointer to local data for the interface.\r
	39	\r
	40	@param Width The width of the access. Enumerated in bytes.\r
	41	See EFI_PEI_PCI_CFG_PPI_WIDTH above.\r
	42	\r
	43	@param Address The physical address of the access. The format of\r
	44	the address is described by EFI_PEI_PCI_CFG_PPI_PCI_ADDRESS.\r
	45	\r
	46	@param Buffer A pointer to the buffer of data..\r
	47	\r
	48	\r
	49	@retval EFI_SUCCESS The function completed successfully.\r
	50	\r
	51	@retval EFI_DEVICE_ERROR There was a problem with the transaction.\r
	52	\r
	53	@retval EFI_DEVICE_NOT_READY The device is not capable of supporting the operation at this\r
	54	time.\r
	55	\r
	56	**/\r
4259256b	57	EFI_STATUS\r
	58	EFIAPI\r
	59	PciCfgRead (\r
	60	IN EFI_PEI_SERVICES **PeiServices,\r
	61	IN EFI_PEI_PCI_CFG_PPI *This,\r
	62	IN EFI_PEI_PCI_CFG_PPI_WIDTH Width,\r
	63	IN UINT64 Address,\r
	64	IN OUT VOID *Buffer\r
	65	);\r
	66	\r
d79eed91	67	/**\r
	68	Write to a given location in the PCI configuration space.\r
	69	\r
	70	@param PeiServices An indirect pointer to the PEI Services Table published by the PEI Foundation.\r
	71	\r
	72	@param This Pointer to local data for the interface.\r
	73	\r
	74	@param Width The width of the access. Enumerated in bytes.\r
	75	See EFI_PEI_PCI_CFG_PPI_WIDTH above.\r
	76	\r
	77	@param Address The physical address of the access. The format of\r
	78	the address is described by EFI_PEI_PCI_CFG_PPI_PCI_ADDRESS.\r
	79	\r
	80	@param Buffer A pointer to the buffer of data..\r
	81	\r
	82	\r
	83	@retval EFI_SUCCESS The function completed successfully.\r
	84	\r
	85	@retval EFI_DEVICE_ERROR There was a problem with the transaction.\r
	86	\r
	87	@retval EFI_DEVICE_NOT_READY The device is not capable of supporting the operation at this\r
	88	time.\r
	89	\r
	90	**/\r
4259256b	91	EFI_STATUS\r
	92	EFIAPI\r
	93	PciCfgWrite (\r
	94	IN EFI_PEI_SERVICES **PeiServices,\r
	95	IN EFI_PEI_PCI_CFG_PPI *This,\r
	96	IN EFI_PEI_PCI_CFG_PPI_WIDTH Width,\r
	97	IN UINT64 Address,\r
	98	IN OUT VOID *Buffer\r
	99	);\r
	100	\r
d79eed91	101	/**\r
	102	PCI read-modify-write operation.\r
	103	\r
	104	@param PeiServices An indirect pointer to the PEI Services Table\r
	105	published by the PEI Foundation.\r
	106	\r
	107	@param This Pointer to local data for the interface.\r
	108	\r
	109	@param Width The width of the access. Enumerated in bytes. Type\r
	110	EFI_PEI_PCI_CFG_PPI_WIDTH is defined in Read().\r
	111	\r
	112	@param Address The physical address of the access.\r
	113	\r
	114	@param SetBits Points to value to bitwise-OR with the read configuration value.\r
	115	The size of the value is determined by Width.\r
	116	\r
	117	@param ClearBits Points to the value to negate and bitwise-AND with the read configuration value.\r
	118	The size of the value is determined by Width.\r
	119	\r
	120	\r
	121	@retval EFI_SUCCESS The function completed successfully.\r
	122	\r
	123	@retval EFI_DEVICE_ERROR There was a problem with the transaction.\r
	124	\r
	125	@retval EFI_DEVICE_NOT_READY The device is not capable of supporting\r
	126	the operation at this time.\r
	127	\r
	128	**/\r
4259256b	129	EFI_STATUS\r
	130	EFIAPI\r
	131	PciCfgModify (\r
	132	IN EFI_PEI_SERVICES **PeiServices,\r
	133	IN EFI_PEI_PCI_CFG_PPI *This,\r
	134	IN EFI_PEI_PCI_CFG_PPI_WIDTH Width,\r
	135	IN UINT64 Address,\r
	136	IN UINTN SetBits,\r
	137	IN UINTN ClearBits\r
	138	);\r
	139	\r
	140	//\r
	141	// Module globals\r
	142	//\r
	143	EFI_PEI_PCI_CFG_PPI mPciCfgPpi = {\r
	144	PciCfgRead,\r
	145	PciCfgWrite,\r
	146	PciCfgModify,\r
	147	};\r
	148	\r
	149	EFI_PEI_PPI_DESCRIPTOR mPpiListPciCfg = {\r
	150	(EFI_PEI_PPI_DESCRIPTOR_PPI \| EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),\r
	151	&gEfiPciCfgPpiInServiceTableGuid,\r
	152	&mPciCfgPpi\r
	153	};\r
	154	\r
d79eed91	155	/**\r
	156	\r
	157	Standard PEIM entry point.\r
	158	\r
	159	@param FfsHeadher The FFS file header\r
	160	@param PeiServices General purpose services available to every PEIM.\r
	161	\r
	162	\r
	163	@retval EFI_SUCCESS if the interface could be successfully\r
	164	installed\r
	165	\r
	166	--*/\r
4259256b	167	EFI_STATUS\r
	168	EFIAPI\r
	169	PeimInitializePciCfg (\r
d79eed91	170	IN EFI_PEI_FILE_HANDLE FfsHeader,\r
4259256b	171	IN CONST EFI_PEI_SERVICES **PeiServices\r
4259256b	172	)\r
d79eed91	173	{\r
	174	//\r
	175	// Publish the PciCfgToPciCfg2 Thunk capability to other modules\r
	176	//\r
	177	return (*PeiServices)->InstallPpi (PeiServices, &mPpiListPciCfg);\r
	178	}\r
4259256b	179	\r
d79eed91	180	/**\r
d79eed91	181	Reads from a given location in the PCI configuration space.\r
4259256b	182	\r
d79eed91	183	@param PeiServices An indirect pointer to the PEI Services Table published by the PEI Foundation.\r
4259256b	184	\r
d79eed91	185	@param This Pointer to local data for the interface.\r
4259256b	186	\r
d79eed91	187	@param Width The width of the access. Enumerated in bytes.\r
d79eed91	188	See EFI_PEI_PCI_CFG_PPI_WIDTH above.\r
4259256b	189	\r
d79eed91	190	@param Address The physical address of the access. The format of\r
d79eed91	191	the address is described by EFI_PEI_PCI_CFG_PPI_PCI_ADDRESS.\r
4259256b	192	\r
d79eed91	193	@param Buffer A pointer to the buffer of data..\r
4259256b	194	\r
4259256b	195	\r
d79eed91	196	@retval EFI_SUCCESS The function completed successfully.\r
	197	\r
	198	@retval EFI_DEVICE_ERROR There was a problem with the transaction.\r
	199	\r
	200	@retval EFI_DEVICE_NOT_READY The device is not capable of supporting the operation at this\r
	201	time.\r
	202	\r
	203	**/\r
4259256b	204	EFI_STATUS\r
	205	EFIAPI\r
	206	PciCfgRead (\r
	207	IN EFI_PEI_SERVICES **PeiServices,\r
	208	IN EFI_PEI_PCI_CFG_PPI *This,\r
	209	IN EFI_PEI_PCI_CFG_PPI_WIDTH Width,\r
	210	IN UINT64 Address,\r
	211	IN OUT VOID *Buffer\r
	212	)\r
	213	{\r
	214	EFI_PEI_PCI_CFG2_PPI *PciCfg2;\r
	215	\r
	216	PciCfg2 = (*PeiServices)->PciCfg;\r
	217	\r
	218	return PciCfg2->Read ((CONST EFI_PEI_SERVICES **)PeiServices, PciCfg2, Width, Address, Buffer);\r
	219	}\r
	220	\r
d79eed91	221	\r
	222	/**\r
	223	Write to a given location in the PCI configuration space.\r
	224	\r
	225	@param PeiServices An indirect pointer to the PEI Services Table published by the PEI Foundation.\r
	226	\r
	227	@param This Pointer to local data for the interface.\r
	228	\r
	229	@param Width The width of the access. Enumerated in bytes.\r
	230	See EFI_PEI_PCI_CFG_PPI_WIDTH above.\r
	231	\r
	232	@param Address The physical address of the access. The format of\r
	233	the address is described by EFI_PEI_PCI_CFG_PPI_PCI_ADDRESS.\r
	234	\r
	235	@param Buffer A pointer to the buffer of data..\r
	236	\r
	237	\r
	238	@retval EFI_SUCCESS The function completed successfully.\r
	239	\r
	240	@retval EFI_DEVICE_ERROR There was a problem with the transaction.\r
	241	\r
	242	@retval EFI_DEVICE_NOT_READY The device is not capable of supporting the operation at this\r
	243	time.\r
	244	\r
	245	**/\r
4259256b	246	EFI_STATUS\r
	247	EFIAPI\r
	248	PciCfgWrite (\r
	249	IN EFI_PEI_SERVICES **PeiServices,\r
	250	IN EFI_PEI_PCI_CFG_PPI *This,\r
	251	IN EFI_PEI_PCI_CFG_PPI_WIDTH Width,\r
	252	IN UINT64 Address,\r
	253	IN OUT VOID *Buffer\r
	254	)\r
	255	{\r
	256	EFI_PEI_PCI_CFG2_PPI *PciCfg2;\r
	257	\r
	258	PciCfg2 = (*PeiServices)->PciCfg;\r
	259	\r
	260	return PciCfg2->Write ((CONST EFI_PEI_SERVICES **)PeiServices, PciCfg2, Width, Address, Buffer);\r
	261	}\r
	262	\r
d79eed91	263	/**\r
	264	PCI read-modify-write operation.\r
	265	\r
	266	@param PeiServices An indirect pointer to the PEI Services Table\r
	267	published by the PEI Foundation.\r
	268	\r
	269	@param This Pointer to local data for the interface.\r
	270	\r
	271	@param Width The width of the access. Enumerated in bytes. Type\r
	272	EFI_PEI_PCI_CFG_PPI_WIDTH is defined in Read().\r
	273	\r
	274	@param Address The physical address of the access.\r
	275	\r
	276	@param SetBits Points to value to bitwise-OR with the read configuration value.\r
	277	The size of the value is determined by Width.\r
	278	\r
	279	@param ClearBits Points to the value to negate and bitwise-AND with the read configuration value.\r
	280	The size of the value is determined by Width.\r
	281	\r
	282	\r
	283	@retval EFI_SUCCESS The function completed successfully.\r
	284	\r
	285	@retval EFI_DEVICE_ERROR There was a problem with the transaction.\r
	286	\r
	287	@retval EFI_DEVICE_NOT_READY The device is not capable of supporting\r
	288	the operation at this time.\r
	289	\r
	290	**/\r
4259256b	291	EFI_STATUS\r
	292	EFIAPI\r
	293	PciCfgModify (\r
	294	IN EFI_PEI_SERVICES **PeiServices,\r
	295	IN EFI_PEI_PCI_CFG_PPI *This,\r
	296	IN EFI_PEI_PCI_CFG_PPI_WIDTH Width,\r
	297	IN UINT64 Address,\r
	298	IN UINTN SetBits,\r
	299	IN UINTN ClearBits\r
	300	)\r
	301	{\r
	302	EFI_PEI_PCI_CFG2_PPI *PciCfg2;\r
	303	\r
	304	PciCfg2 = (*PeiServices)->PciCfg;\r
	305	\r
	306	return PciCfg2->Modify ((CONST EFI_PEI_SERVICES **)PeiServices, PciCfg2, Width, Address, &SetBits, &ClearBits);\r
	307	}\r