--- /dev/null
+/** @file\r
+ PCI Library using PCI CFG2 PPI.\r
+\r
+ Copyright (c) 2007 - 2008, Intel Corporation All rights\r
+ reserved. This program and the accompanying materials are\r
+ licensed and made available under the terms and conditions of\r
+ the BSD License which accompanies this distribution. The full\r
+ 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 <PiPei.h>\r
+\r
+#include <Ppi/PciCfg2.h>\r
+\r
+#include <Library/PciLib.h>\r
+#include <Library/BaseLib.h>\r
+#include <Library/PeiServicesTablePointerLib.h>\r
+#include <Library/DebugLib.h>\r
+#include <Library/PeiServicesLib.h>\r
+\r
+/**\r
+ Assert the validity of a PCI address. A valid PCI address should contain 1's\r
+ only in the low 28 bits.\r
+\r
+ @param A The address to validate.\r
+ @param M Additional bits to assert to be zero.\r
+\r
+**/\r
+#define ASSERT_INVALID_PCI_ADDRESS(A,M) \\r
+ ASSERT (((A) & (~0xfffffff | (M))) == 0)\r
+\r
+/**\r
+ Translate PCI Lib address into format of PCI CFG2 PPI.\r
+\r
+ @param A Address that encodes the PCI Bus, Device, Function and\r
+ Register.\r
+\r
+**/\r
+#define PCI_TO_PCICFG2_ADDRESS(A) \\r
+ (((A) << 4) & 0xff000000) | (((A) >> 4) & 0x00000700) | (((A) << 1) & 0x001f0000) | ((UINT64)((A) & 0xFFF) << 32)\r
+\r
+/**\r
+ Internal worker function to read a PCI configuration register.\r
+\r
+ This function wraps EFI_PEI_PCI_CFG2_PPI.Read() service.\r
+ It reads and returns the PCI configuration register specified by Address,\r
+ the width of data is specified by Width.\r
+\r
+ @param Address Address that encodes the PCI Bus, Device, Function and\r
+ Register.\r
+ @param Width Width of data to read\r
+\r
+ @return The value read from the PCI configuration register.\r
+\r
+**/\r
+UINT32\r
+PeiPciLibPciCfg2ReadWorker (\r
+ IN UINTN Address,\r
+ IN EFI_PEI_PCI_CFG_PPI_WIDTH Width\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ UINT32 Data;\r
+ CONST EFI_PEI_PCI_CFG2_PPI *PciCfg2Ppi;\r
+\r
+ Status = PeiServicesLocatePpi (&gEfiPciCfg2PpiGuid, 0, NULL, (VOID **) &PciCfg2Ppi);\r
+ ASSERT_EFI_ERROR (Status);\r
+ ASSERT (PciCfg2Ppi != NULL);\r
+\r
+ PciCfg2Ppi->Read (\r
+ GetPeiServicesTablePointer (),\r
+ PciCfg2Ppi,\r
+ Width,\r
+ PCI_TO_PCICFG2_ADDRESS (Address),\r
+ &Data\r
+ );\r
+\r
+ return Data;\r
+}\r
+\r
+/**\r
+ Internal worker function to writes a PCI configuration register.\r
+\r
+ This function wraps EFI_PEI_PCI_CFG2_PPI.Write() service.\r
+ It writes the PCI configuration register specified by Address with the\r
+ value specified by Data. The width of data is specifed by Width.\r
+ Data is returned.\r
+\r
+ @param Address Address that encodes the PCI Bus, Device, Function and\r
+ Register.\r
+ @param Width Width of data to write\r
+ @param Data The value to write.\r
+\r
+ @return The value written to the PCI configuration register.\r
+\r
+**/\r
+UINT32\r
+PeiPciLibPciCfg2WriteWorker (\r
+ IN UINTN Address,\r
+ IN EFI_PEI_PCI_CFG_PPI_WIDTH Width,\r
+ IN UINT32 Data\r
+ )\r
+{\r
+ EFI_STATUS Status;\r
+ CONST EFI_PEI_PCI_CFG2_PPI *PciCfg2Ppi;\r
+\r
+ Status = PeiServicesLocatePpi (&gEfiPciCfg2PpiGuid, 0, NULL, (VOID **) &PciCfg2Ppi);\r
+ ASSERT_EFI_ERROR (Status);\r
+ ASSERT (PciCfg2Ppi != NULL);\r
+\r
+ PciCfg2Ppi->Write (\r
+ GetPeiServicesTablePointer (),\r
+ PciCfg2Ppi,\r
+ Width,\r
+ PCI_TO_PCICFG2_ADDRESS (Address),\r
+ &Data\r
+ );\r
+\r
+ return Data;\r
+}\r
+\r
+/**\r
+ Reads an 8-bit PCI configuration register.\r
+\r
+ Reads and returns the 8-bit PCI configuration register specified by Address.\r
+ This function must guarantee that all PCI read and write operations are\r
+ serialized.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+\r
+ @param Address Address that encodes the PCI Bus, Device, Function and\r
+ Register.\r
+\r
+ @return The value read from the PCI configuration register.\r
+\r
+**/\r
+UINT8\r
+EFIAPI\r
+PciRead8 (\r
+ IN UINTN Address\r
+ )\r
+{\r
+ ASSERT_INVALID_PCI_ADDRESS (Address, 0);\r
+\r
+ return (UINT8) PeiPciLibPciCfg2ReadWorker (Address, EfiPeiPciCfgWidthUint8);\r
+}\r
+\r
+/**\r
+ Writes an 8-bit PCI configuration register.\r
+\r
+ Writes the 8-bit PCI configuration register specified by Address with the\r
+ value specified by Value. Value is returned. This function must guarantee\r
+ that all PCI read and write operations are serialized.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+\r
+ @param Address Address that encodes the PCI Bus, Device, Function and\r
+ Register.\r
+ @param Data The value to write.\r
+\r
+ @return The value written to the PCI configuration register.\r
+\r
+**/\r
+UINT8\r
+EFIAPI\r
+PciWrite8 (\r
+ IN UINTN Address,\r
+ IN UINT8 Data\r
+ )\r
+{\r
+ ASSERT_INVALID_PCI_ADDRESS (Address, 0);\r
+\r
+ return (UINT8) PeiPciLibPciCfg2WriteWorker (Address, EfiPeiPciCfgWidthUint8, Data);\r
+}\r
+\r
+/**\r
+ Performs a bitwise inclusive OR of an 8-bit PCI configuration register with\r
+ an 8-bit value.\r
+\r
+ Reads the 8-bit PCI configuration register specified by Address, performs a\r
+ bitwise inclusive OR between the read result and the value specified by\r
+ OrData, and writes the result to the 8-bit PCI configuration register\r
+ specified by Address. The value written to the PCI configuration register is\r
+ returned. This function must guarantee that all PCI read and write operations\r
+ are serialized.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+\r
+ @param Address Address that encodes the PCI Bus, Device, Function and\r
+ Register.\r
+ @param OrData The value to OR with the PCI configuration register.\r
+\r
+ @return The value written back to the PCI configuration register.\r
+\r
+**/\r
+UINT8\r
+EFIAPI\r
+PciOr8 (\r
+ IN UINTN Address,\r
+ IN UINT8 OrData\r
+ )\r
+{\r
+ return PciWrite8 (Address, (UINT8) (PciRead8 (Address) | OrData));\r
+}\r
+\r
+/**\r
+ Performs a bitwise AND of an 8-bit PCI configuration register with an 8-bit\r
+ value.\r
+\r
+ Reads the 8-bit PCI configuration register specified by Address, performs a\r
+ bitwise AND between the read result and the value specified by AndData, and\r
+ writes the result to the 8-bit PCI configuration register specified by\r
+ Address. The value written to the PCI configuration register is returned.\r
+ This function must guarantee that all PCI read and write operations are\r
+ serialized.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+\r
+ @param Address Address that encodes the PCI Bus, Device, Function and\r
+ Register.\r
+ @param AndData The value to AND with the PCI configuration register.\r
+\r
+ @return The value written back to the PCI configuration register.\r
+\r
+**/\r
+UINT8\r
+EFIAPI\r
+PciAnd8 (\r
+ IN UINTN Address,\r
+ IN UINT8 AndData\r
+ )\r
+{\r
+ return PciWrite8 (Address, (UINT8) (PciRead8 (Address) & AndData));\r
+}\r
+\r
+/**\r
+ Performs a bitwise AND of an 8-bit PCI configuration register with an 8-bit\r
+ value, followed a bitwise inclusive OR with another 8-bit value.\r
+\r
+ Reads the 8-bit PCI configuration register specified by Address, performs a\r
+ bitwise AND between the read result and the value specified by AndData,\r
+ performs a bitwise inclusive OR between the result of the AND operation and\r
+ the value specified by OrData, and writes the result to the 8-bit PCI\r
+ configuration register specified by Address. The value written to the PCI\r
+ configuration register is returned. This function must guarantee that all PCI\r
+ read and write operations are serialized.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+\r
+ @param Address Address that encodes the PCI Bus, Device, Function and\r
+ Register.\r
+ @param AndData The value to AND with the PCI configuration register.\r
+ @param OrData The value to OR with the result of the AND operation.\r
+\r
+ @return The value written back to the PCI configuration register.\r
+\r
+**/\r
+UINT8\r
+EFIAPI\r
+PciAndThenOr8 (\r
+ IN UINTN Address,\r
+ IN UINT8 AndData,\r
+ IN UINT8 OrData\r
+ )\r
+{\r
+ return PciWrite8 (Address, (UINT8) ((PciRead8 (Address) & AndData) | OrData));\r
+}\r
+\r
+/**\r
+ Reads a bit field of a PCI configuration register.\r
+\r
+ Reads the bit field in an 8-bit PCI configuration register. The bit field is\r
+ specified by the StartBit and the EndBit. The value of the bit field is\r
+ returned.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+ If StartBit is greater than 7, then ASSERT().\r
+ If EndBit is greater than 7, then ASSERT().\r
+ If EndBit is less than StartBit, then ASSERT().\r
+\r
+ @param Address PCI configuration register to read.\r
+ @param StartBit The ordinal of the least significant bit in the bit field.\r
+ Range 0..7.\r
+ @param EndBit The ordinal of the most significant bit in the bit field.\r
+ Range 0..7.\r
+\r
+ @return The value of the bit field read from the PCI configuration register.\r
+\r
+**/\r
+UINT8\r
+EFIAPI\r
+PciBitFieldRead8 (\r
+ IN UINTN Address,\r
+ IN UINTN StartBit,\r
+ IN UINTN EndBit\r
+ )\r
+{\r
+ return BitFieldRead8 (PciRead8 (Address), StartBit, EndBit);\r
+}\r
+\r
+/**\r
+ Writes a bit field to a PCI configuration register.\r
+\r
+ Writes Value to the bit field of the PCI configuration register. The bit\r
+ field is specified by the StartBit and the EndBit. All other bits in the\r
+ destination PCI configuration register are preserved. The new value of the\r
+ 8-bit register is returned.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+ If StartBit is greater than 7, then ASSERT().\r
+ If EndBit is greater than 7, then ASSERT().\r
+ If EndBit is less than StartBit, then ASSERT().\r
+\r
+ @param Address PCI configuration register to write.\r
+ @param StartBit The ordinal of the least significant bit in the bit field.\r
+ Range 0..7.\r
+ @param EndBit The ordinal of the most significant bit in the bit field.\r
+ Range 0..7.\r
+ @param Value New value of the bit field.\r
+\r
+ @return The value written back to the PCI configuration register.\r
+\r
+**/\r
+UINT8\r
+EFIAPI\r
+PciBitFieldWrite8 (\r
+ IN UINTN Address,\r
+ IN UINTN StartBit,\r
+ IN UINTN EndBit,\r
+ IN UINT8 Value\r
+ )\r
+{\r
+ return PciWrite8 (\r
+ Address,\r
+ BitFieldWrite8 (PciRead8 (Address), StartBit, EndBit, Value)\r
+ );\r
+}\r
+\r
+/**\r
+ Reads a bit field in an 8-bit PCI configuration, performs a bitwise OR, and\r
+ writes the result back to the bit field in the 8-bit port.\r
+\r
+ Reads the 8-bit PCI configuration register specified by Address, performs a\r
+ bitwise inclusive OR between the read result and the value specified by\r
+ OrData, and writes the result to the 8-bit PCI configuration register\r
+ specified by Address. The value written to the PCI configuration register is\r
+ returned. This function must guarantee that all PCI read and write operations\r
+ are serialized. Extra left bits in OrData are stripped.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+ If StartBit is greater than 7, then ASSERT().\r
+ If EndBit is greater than 7, then ASSERT().\r
+ If EndBit is less than StartBit, then ASSERT().\r
+\r
+ @param Address PCI configuration register to write.\r
+ @param StartBit The ordinal of the least significant bit in the bit field.\r
+ Range 0..7.\r
+ @param EndBit The ordinal of the most significant bit in the bit field.\r
+ Range 0..7.\r
+ @param OrData The value to OR with the PCI configuration register.\r
+\r
+ @return The value written back to the PCI configuration register.\r
+\r
+**/\r
+UINT8\r
+EFIAPI\r
+PciBitFieldOr8 (\r
+ IN UINTN Address,\r
+ IN UINTN StartBit,\r
+ IN UINTN EndBit,\r
+ IN UINT8 OrData\r
+ )\r
+{\r
+ return PciWrite8 (\r
+ Address,\r
+ BitFieldOr8 (PciRead8 (Address), StartBit, EndBit, OrData)\r
+ );\r
+}\r
+\r
+/**\r
+ Reads a bit field in an 8-bit PCI configuration register, performs a bitwise\r
+ AND, and writes the result back to the bit field in the 8-bit register.\r
+\r
+ Reads the 8-bit PCI configuration register specified by Address, performs a\r
+ bitwise AND between the read result and the value specified by AndData, and\r
+ writes the result to the 8-bit PCI configuration register specified by\r
+ Address. The value written to the PCI configuration register is returned.\r
+ This function must guarantee that all PCI read and write operations are\r
+ serialized. Extra left bits in AndData are stripped.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+ If StartBit is greater than 7, then ASSERT().\r
+ If EndBit is greater than 7, then ASSERT().\r
+ If EndBit is less than StartBit, then ASSERT().\r
+\r
+ @param Address PCI configuration register to write.\r
+ @param StartBit The ordinal of the least significant bit in the bit field.\r
+ Range 0..7.\r
+ @param EndBit The ordinal of the most significant bit in the bit field.\r
+ Range 0..7.\r
+ @param AndData The value to AND with the PCI configuration register.\r
+\r
+ @return The value written back to the PCI configuration register.\r
+\r
+**/\r
+UINT8\r
+EFIAPI\r
+PciBitFieldAnd8 (\r
+ IN UINTN Address,\r
+ IN UINTN StartBit,\r
+ IN UINTN EndBit,\r
+ IN UINT8 AndData\r
+ )\r
+{\r
+ return PciWrite8 (\r
+ Address,\r
+ BitFieldAnd8 (PciRead8 (Address), StartBit, EndBit, AndData)\r
+ );\r
+}\r
+\r
+/**\r
+ Reads a bit field in an 8-bit port, performs a bitwise AND followed by a\r
+ bitwise inclusive OR, and writes the result back to the bit field in the\r
+ 8-bit port.\r
+\r
+ Reads the 8-bit PCI configuration register specified by Address, performs a\r
+ bitwise AND followed by a bitwise inclusive OR between the read result and\r
+ the value specified by AndData, and writes the result to the 8-bit PCI\r
+ configuration register specified by Address. The value written to the PCI\r
+ configuration register is returned. This function must guarantee that all PCI\r
+ read and write operations are serialized. Extra left bits in both AndData and\r
+ OrData are stripped.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+ If StartBit is greater than 7, then ASSERT().\r
+ If EndBit is greater than 7, then ASSERT().\r
+ If EndBit is less than StartBit, then ASSERT().\r
+\r
+ @param Address PCI configuration register to write.\r
+ @param StartBit The ordinal of the least significant bit in the bit field.\r
+ Range 0..7.\r
+ @param EndBit The ordinal of the most significant bit in the bit field.\r
+ Range 0..7.\r
+ @param AndData The value to AND with the PCI configuration register.\r
+ @param OrData The value to OR with the result of the AND operation.\r
+\r
+ @return The value written back to the PCI configuration register.\r
+\r
+**/\r
+UINT8\r
+EFIAPI\r
+PciBitFieldAndThenOr8 (\r
+ IN UINTN Address,\r
+ IN UINTN StartBit,\r
+ IN UINTN EndBit,\r
+ IN UINT8 AndData,\r
+ IN UINT8 OrData\r
+ )\r
+{\r
+ return PciWrite8 (\r
+ Address,\r
+ BitFieldAndThenOr8 (PciRead8 (Address), StartBit, EndBit, AndData, OrData)\r
+ );\r
+}\r
+\r
+/**\r
+ Reads a 16-bit PCI configuration register.\r
+\r
+ Reads and returns the 16-bit PCI configuration register specified by Address.\r
+ This function must guarantee that all PCI read and write operations are\r
+ serialized.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+ If Address is not aligned on a 16-bit boundary, then ASSERT().\r
+\r
+ @param Address Address that encodes the PCI Bus, Device, Function and\r
+ Register.\r
+\r
+ @return The value read from the PCI configuration register.\r
+\r
+**/\r
+UINT16\r
+EFIAPI\r
+PciRead16 (\r
+ IN UINTN Address\r
+ )\r
+{\r
+ ASSERT_INVALID_PCI_ADDRESS (Address, 1);\r
+\r
+ return (UINT16) PeiPciLibPciCfg2ReadWorker (Address, EfiPeiPciCfgWidthUint16);\r
+}\r
+\r
+/**\r
+ Writes a 16-bit PCI configuration register.\r
+\r
+ Writes the 16-bit PCI configuration register specified by Address with the\r
+ value specified by Value. Value is returned. This function must guarantee\r
+ that all PCI read and write operations are serialized.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+ If Address is not aligned on a 16-bit boundary, then ASSERT().\r
+\r
+ @param Address Address that encodes the PCI Bus, Device, Function and\r
+ Register.\r
+ @param Data The value to write.\r
+\r
+ @return The value written to the PCI configuration register.\r
+\r
+**/\r
+UINT16\r
+EFIAPI\r
+PciWrite16 (\r
+ IN UINTN Address,\r
+ IN UINT16 Data\r
+ )\r
+{\r
+ ASSERT_INVALID_PCI_ADDRESS (Address, 1);\r
+\r
+ return (UINT16) PeiPciLibPciCfg2WriteWorker (Address, EfiPeiPciCfgWidthUint16, Data);\r
+}\r
+\r
+/**\r
+ Performs a bitwise inclusive OR of a 16-bit PCI configuration register with\r
+ a 16-bit value.\r
+\r
+ Reads the 16-bit PCI configuration register specified by Address, performs a\r
+ bitwise inclusive OR between the read result and the value specified by\r
+ OrData, and writes the result to the 16-bit PCI configuration register\r
+ specified by Address. The value written to the PCI configuration register is\r
+ returned. This function must guarantee that all PCI read and write operations\r
+ are serialized.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+ If Address is not aligned on a 16-bit boundary, then ASSERT().\r
+\r
+ @param Address Address that encodes the PCI Bus, Device, Function and\r
+ Register.\r
+ @param OrData The value to OR with the PCI configuration register.\r
+\r
+ @return The value written back to the PCI configuration register.\r
+\r
+**/\r
+UINT16\r
+EFIAPI\r
+PciOr16 (\r
+ IN UINTN Address,\r
+ IN UINT16 OrData\r
+ )\r
+{\r
+ return PciWrite16 (Address, (UINT16) (PciRead16 (Address) | OrData));\r
+}\r
+\r
+/**\r
+ Performs a bitwise AND of a 16-bit PCI configuration register with a 16-bit\r
+ value.\r
+\r
+ Reads the 16-bit PCI configuration register specified by Address, performs a\r
+ bitwise AND between the read result and the value specified by AndData, and\r
+ writes the result to the 16-bit PCI configuration register specified by\r
+ Address. The value written to the PCI configuration register is returned.\r
+ This function must guarantee that all PCI read and write operations are\r
+ serialized.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+ If Address is not aligned on a 16-bit boundary, then ASSERT().\r
+\r
+ @param Address Address that encodes the PCI Bus, Device, Function and\r
+ Register.\r
+ @param AndData The value to AND with the PCI configuration register.\r
+\r
+ @return The value written back to the PCI configuration register.\r
+\r
+**/\r
+UINT16\r
+EFIAPI\r
+PciAnd16 (\r
+ IN UINTN Address,\r
+ IN UINT16 AndData\r
+ )\r
+{\r
+ return PciWrite16 (Address, (UINT16) (PciRead16 (Address) & AndData));\r
+}\r
+\r
+/**\r
+ Performs a bitwise AND of a 16-bit PCI configuration register with a 16-bit\r
+ value, followed a bitwise inclusive OR with another 16-bit value.\r
+\r
+ Reads the 16-bit PCI configuration register specified by Address, performs a\r
+ bitwise AND between the read result and the value specified by AndData,\r
+ performs a bitwise inclusive OR between the result of the AND operation and\r
+ the value specified by OrData, and writes the result to the 16-bit PCI\r
+ configuration register specified by Address. The value written to the PCI\r
+ configuration register is returned. This function must guarantee that all PCI\r
+ read and write operations are serialized.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+ If Address is not aligned on a 16-bit boundary, then ASSERT().\r
+\r
+ @param Address Address that encodes the PCI Bus, Device, Function and\r
+ Register.\r
+ @param AndData The value to AND with the PCI configuration register.\r
+ @param OrData The value to OR with the result of the AND operation.\r
+\r
+ @return The value written back to the PCI configuration register.\r
+\r
+**/\r
+UINT16\r
+EFIAPI\r
+PciAndThenOr16 (\r
+ IN UINTN Address,\r
+ IN UINT16 AndData,\r
+ IN UINT16 OrData\r
+ )\r
+{\r
+ return PciWrite16 (Address, (UINT16) ((PciRead16 (Address) & AndData) | OrData));\r
+}\r
+\r
+/**\r
+ Reads a bit field of a PCI configuration register.\r
+\r
+ Reads the bit field in a 16-bit PCI configuration register. The bit field is\r
+ specified by the StartBit and the EndBit. The value of the bit field is\r
+ returned.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+ If Address is not aligned on a 16-bit boundary, then ASSERT().\r
+ If StartBit is greater than 15, then ASSERT().\r
+ If EndBit is greater than 15, then ASSERT().\r
+ If EndBit is less than StartBit, then ASSERT().\r
+\r
+ @param Address PCI configuration register to read.\r
+ @param StartBit The ordinal of the least significant bit in the bit field.\r
+ Range 0..15.\r
+ @param EndBit The ordinal of the most significant bit in the bit field.\r
+ Range 0..15.\r
+\r
+ @return The value of the bit field read from the PCI configuration register.\r
+\r
+**/\r
+UINT16\r
+EFIAPI\r
+PciBitFieldRead16 (\r
+ IN UINTN Address,\r
+ IN UINTN StartBit,\r
+ IN UINTN EndBit\r
+ )\r
+{\r
+ return BitFieldRead16 (PciRead16 (Address), StartBit, EndBit);\r
+}\r
+\r
+/**\r
+ Writes a bit field to a PCI configuration register.\r
+\r
+ Writes Value to the bit field of the PCI configuration register. The bit\r
+ field is specified by the StartBit and the EndBit. All other bits in the\r
+ destination PCI configuration register are preserved. The new value of the\r
+ 16-bit register is returned.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+ If Address is not aligned on a 16-bit boundary, then ASSERT().\r
+ If StartBit is greater than 15, then ASSERT().\r
+ If EndBit is greater than 15, then ASSERT().\r
+ If EndBit is less than StartBit, then ASSERT().\r
+\r
+ @param Address PCI configuration register to write.\r
+ @param StartBit The ordinal of the least significant bit in the bit field.\r
+ Range 0..15.\r
+ @param EndBit The ordinal of the most significant bit in the bit field.\r
+ Range 0..15.\r
+ @param Value New value of the bit field.\r
+\r
+ @return The value written back to the PCI configuration register.\r
+\r
+**/\r
+UINT16\r
+EFIAPI\r
+PciBitFieldWrite16 (\r
+ IN UINTN Address,\r
+ IN UINTN StartBit,\r
+ IN UINTN EndBit,\r
+ IN UINT16 Value\r
+ )\r
+{\r
+ return PciWrite16 (\r
+ Address,\r
+ BitFieldWrite16 (PciRead16 (Address), StartBit, EndBit, Value)\r
+ );\r
+}\r
+\r
+/**\r
+ Reads a bit field in a 16-bit PCI configuration, performs a bitwise OR, and\r
+ writes the result back to the bit field in the 16-bit port.\r
+\r
+ Reads the 16-bit PCI configuration register specified by Address, performs a\r
+ bitwise inclusive OR between the read result and the value specified by\r
+ OrData, and writes the result to the 16-bit PCI configuration register\r
+ specified by Address. The value written to the PCI configuration register is\r
+ returned. This function must guarantee that all PCI read and write operations\r
+ are serialized. Extra left bits in OrData are stripped.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+ If Address is not aligned on a 16-bit boundary, then ASSERT().\r
+ If StartBit is greater than 15, then ASSERT().\r
+ If EndBit is greater than 15, then ASSERT().\r
+ If EndBit is less than StartBit, then ASSERT().\r
+\r
+ @param Address PCI configuration register to write.\r
+ @param StartBit The ordinal of the least significant bit in the bit field.\r
+ Range 0..15.\r
+ @param EndBit The ordinal of the most significant bit in the bit field.\r
+ Range 0..15.\r
+ @param OrData The value to OR with the PCI configuration register.\r
+\r
+ @return The value written back to the PCI configuration register.\r
+\r
+**/\r
+UINT16\r
+EFIAPI\r
+PciBitFieldOr16 (\r
+ IN UINTN Address,\r
+ IN UINTN StartBit,\r
+ IN UINTN EndBit,\r
+ IN UINT16 OrData\r
+ )\r
+{\r
+ return PciWrite16 (\r
+ Address,\r
+ BitFieldOr16 (PciRead16 (Address), StartBit, EndBit, OrData)\r
+ );\r
+}\r
+\r
+/**\r
+ Reads a bit field in a 16-bit PCI configuration register, performs a bitwise\r
+ AND, and writes the result back to the bit field in the 16-bit register.\r
+\r
+ Reads the 16-bit PCI configuration register specified by Address, performs a\r
+ bitwise AND between the read result and the value specified by AndData, and\r
+ writes the result to the 16-bit PCI configuration register specified by\r
+ Address. The value written to the PCI configuration register is returned.\r
+ This function must guarantee that all PCI read and write operations are\r
+ serialized. Extra left bits in AndData are stripped.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+ If Address is not aligned on a 16-bit boundary, then ASSERT().\r
+ If StartBit is greater than 15, then ASSERT().\r
+ If EndBit is greater than 15, then ASSERT().\r
+ If EndBit is less than StartBit, then ASSERT().\r
+\r
+ @param Address PCI configuration register to write.\r
+ @param StartBit The ordinal of the least significant bit in the bit field.\r
+ Range 0..15.\r
+ @param EndBit The ordinal of the most significant bit in the bit field.\r
+ Range 0..15.\r
+ @param AndData The value to AND with the PCI configuration register.\r
+\r
+ @return The value written back to the PCI configuration register.\r
+\r
+**/\r
+UINT16\r
+EFIAPI\r
+PciBitFieldAnd16 (\r
+ IN UINTN Address,\r
+ IN UINTN StartBit,\r
+ IN UINTN EndBit,\r
+ IN UINT16 AndData\r
+ )\r
+{\r
+ return PciWrite16 (\r
+ Address,\r
+ BitFieldAnd16 (PciRead16 (Address), StartBit, EndBit, AndData)\r
+ );\r
+}\r
+\r
+/**\r
+ Reads a bit field in a 16-bit port, performs a bitwise AND followed by a\r
+ bitwise inclusive OR, and writes the result back to the bit field in the\r
+ 16-bit port.\r
+\r
+ Reads the 16-bit PCI configuration register specified by Address, performs a\r
+ bitwise AND followed by a bitwise inclusive OR between the read result and\r
+ the value specified by AndData, and writes the result to the 16-bit PCI\r
+ configuration register specified by Address. The value written to the PCI\r
+ configuration register is returned. This function must guarantee that all PCI\r
+ read and write operations are serialized. Extra left bits in both AndData and\r
+ OrData are stripped.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+ If Address is not aligned on a 16-bit boundary, then ASSERT().\r
+ If StartBit is greater than 15, then ASSERT().\r
+ If EndBit is greater than 15, then ASSERT().\r
+ If EndBit is less than StartBit, then ASSERT().\r
+\r
+ @param Address PCI configuration register to write.\r
+ @param StartBit The ordinal of the least significant bit in the bit field.\r
+ Range 0..15.\r
+ @param EndBit The ordinal of the most significant bit in the bit field.\r
+ Range 0..15.\r
+ @param AndData The value to AND with the PCI configuration register.\r
+ @param OrData The value to OR with the result of the AND operation.\r
+\r
+ @return The value written back to the PCI configuration register.\r
+\r
+**/\r
+UINT16\r
+EFIAPI\r
+PciBitFieldAndThenOr16 (\r
+ IN UINTN Address,\r
+ IN UINTN StartBit,\r
+ IN UINTN EndBit,\r
+ IN UINT16 AndData,\r
+ IN UINT16 OrData\r
+ )\r
+{\r
+ return PciWrite16 (\r
+ Address,\r
+ BitFieldAndThenOr16 (PciRead16 (Address), StartBit, EndBit, AndData, OrData)\r
+ );\r
+}\r
+\r
+/**\r
+ Reads a 32-bit PCI configuration register.\r
+\r
+ Reads and returns the 32-bit PCI configuration register specified by Address.\r
+ This function must guarantee that all PCI read and write operations are\r
+ serialized.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+ If Address is not aligned on a 32-bit boundary, then ASSERT().\r
+\r
+ @param Address Address that encodes the PCI Bus, Device, Function and\r
+ Register.\r
+\r
+ @return The value read from the PCI configuration register.\r
+\r
+**/\r
+UINT32\r
+EFIAPI\r
+PciRead32 (\r
+ IN UINTN Address\r
+ )\r
+{\r
+ ASSERT_INVALID_PCI_ADDRESS (Address, 3);\r
+\r
+ return PeiPciLibPciCfg2ReadWorker (Address, EfiPeiPciCfgWidthUint32);\r
+}\r
+\r
+/**\r
+ Writes a 32-bit PCI configuration register.\r
+\r
+ Writes the 32-bit PCI configuration register specified by Address with the\r
+ value specified by Value. Value is returned. This function must guarantee\r
+ that all PCI read and write operations are serialized.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+ If Address is not aligned on a 32-bit boundary, then ASSERT().\r
+\r
+ @param Address Address that encodes the PCI Bus, Device, Function and\r
+ Register.\r
+ @param Data The value to write.\r
+\r
+ @return The value written to the PCI configuration register.\r
+\r
+**/\r
+UINT32\r
+EFIAPI\r
+PciWrite32 (\r
+ IN UINTN Address,\r
+ IN UINT32 Data\r
+ )\r
+{\r
+ ASSERT_INVALID_PCI_ADDRESS (Address, 3);\r
+\r
+ return PeiPciLibPciCfg2WriteWorker (Address, EfiPeiPciCfgWidthUint32, Data);\r
+}\r
+\r
+/**\r
+ Performs a bitwise inclusive OR of a 32-bit PCI configuration register with\r
+ a 32-bit value.\r
+\r
+ Reads the 32-bit PCI configuration register specified by Address, performs a\r
+ bitwise inclusive OR between the read result and the value specified by\r
+ OrData, and writes the result to the 32-bit PCI configuration register\r
+ specified by Address. The value written to the PCI configuration register is\r
+ returned. This function must guarantee that all PCI read and write operations\r
+ are serialized.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+ If Address is not aligned on a 32-bit boundary, then ASSERT().\r
+\r
+ @param Address Address that encodes the PCI Bus, Device, Function and\r
+ Register.\r
+ @param OrData The value to OR with the PCI configuration register.\r
+\r
+ @return The value written back to the PCI configuration register.\r
+\r
+**/\r
+UINT32\r
+EFIAPI\r
+PciOr32 (\r
+ IN UINTN Address,\r
+ IN UINT32 OrData\r
+ )\r
+{\r
+ return PciWrite32 (Address, PciRead32 (Address) | OrData);\r
+}\r
+\r
+/**\r
+ Performs a bitwise AND of a 32-bit PCI configuration register with a 32-bit\r
+ value.\r
+\r
+ Reads the 32-bit PCI configuration register specified by Address, performs a\r
+ bitwise AND between the read result and the value specified by AndData, and\r
+ writes the result to the 32-bit PCI configuration register specified by\r
+ Address. The value written to the PCI configuration register is returned.\r
+ This function must guarantee that all PCI read and write operations are\r
+ serialized.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+ If Address is not aligned on a 32-bit boundary, then ASSERT().\r
+\r
+ @param Address Address that encodes the PCI Bus, Device, Function and\r
+ Register.\r
+ @param AndData The value to AND with the PCI configuration register.\r
+\r
+ @return The value written back to the PCI configuration register.\r
+\r
+**/\r
+UINT32\r
+EFIAPI\r
+PciAnd32 (\r
+ IN UINTN Address,\r
+ IN UINT32 AndData\r
+ )\r
+{\r
+ return PciWrite32 (Address, PciRead32 (Address) & AndData);\r
+}\r
+\r
+/**\r
+ Performs a bitwise AND of a 32-bit PCI configuration register with a 32-bit\r
+ value, followed a bitwise inclusive OR with another 32-bit value.\r
+\r
+ Reads the 32-bit PCI configuration register specified by Address, performs a\r
+ bitwise AND between the read result and the value specified by AndData,\r
+ performs a bitwise inclusive OR between the result of the AND operation and\r
+ the value specified by OrData, and writes the result to the 32-bit PCI\r
+ configuration register specified by Address. The value written to the PCI\r
+ configuration register is returned. This function must guarantee that all PCI\r
+ read and write operations are serialized.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+ If Address is not aligned on a 32-bit boundary, then ASSERT().\r
+\r
+ @param Address Address that encodes the PCI Bus, Device, Function and\r
+ Register.\r
+ @param AndData The value to AND with the PCI configuration register.\r
+ @param OrData The value to OR with the result of the AND operation.\r
+\r
+ @return The value written back to the PCI configuration register.\r
+\r
+**/\r
+UINT32\r
+EFIAPI\r
+PciAndThenOr32 (\r
+ IN UINTN Address,\r
+ IN UINT32 AndData,\r
+ IN UINT32 OrData\r
+ )\r
+{\r
+ return PciWrite32 (Address, (PciRead32 (Address) & AndData) | OrData);\r
+}\r
+\r
+/**\r
+ Reads a bit field of a PCI configuration register.\r
+\r
+ Reads the bit field in a 32-bit PCI configuration register. The bit field is\r
+ specified by the StartBit and the EndBit. The value of the bit field is\r
+ returned.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+ If Address is not aligned on a 32-bit boundary, then ASSERT().\r
+ If StartBit is greater than 31, then ASSERT().\r
+ If EndBit is greater than 31, then ASSERT().\r
+ If EndBit is less than StartBit, then ASSERT().\r
+\r
+ @param Address PCI configuration register to read.\r
+ @param StartBit The ordinal of the least significant bit in the bit field.\r
+ Range 0..31.\r
+ @param EndBit The ordinal of the most significant bit in the bit field.\r
+ Range 0..31.\r
+\r
+ @return The value of the bit field read from the PCI configuration register.\r
+\r
+**/\r
+UINT32\r
+EFIAPI\r
+PciBitFieldRead32 (\r
+ IN UINTN Address,\r
+ IN UINTN StartBit,\r
+ IN UINTN EndBit\r
+ )\r
+{\r
+ return BitFieldRead32 (PciRead32 (Address), StartBit, EndBit);\r
+}\r
+\r
+/**\r
+ Writes a bit field to a PCI configuration register.\r
+\r
+ Writes Value to the bit field of the PCI configuration register. The bit\r
+ field is specified by the StartBit and the EndBit. All other bits in the\r
+ destination PCI configuration register are preserved. The new value of the\r
+ 32-bit register is returned.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+ If Address is not aligned on a 32-bit boundary, then ASSERT().\r
+ If StartBit is greater than 31, then ASSERT().\r
+ If EndBit is greater than 31, then ASSERT().\r
+ If EndBit is less than StartBit, then ASSERT().\r
+\r
+ @param Address PCI configuration register to write.\r
+ @param StartBit The ordinal of the least significant bit in the bit field.\r
+ Range 0..31.\r
+ @param EndBit The ordinal of the most significant bit in the bit field.\r
+ Range 0..31.\r
+ @param Value New value of the bit field.\r
+\r
+ @return The value written back to the PCI configuration register.\r
+\r
+**/\r
+UINT32\r
+EFIAPI\r
+PciBitFieldWrite32 (\r
+ IN UINTN Address,\r
+ IN UINTN StartBit,\r
+ IN UINTN EndBit,\r
+ IN UINT32 Value\r
+ )\r
+{\r
+ return PciWrite32 (\r
+ Address,\r
+ BitFieldWrite32 (PciRead32 (Address), StartBit, EndBit, Value)\r
+ );\r
+}\r
+\r
+/**\r
+ Reads a bit field in a 32-bit PCI configuration, performs a bitwise OR, and\r
+ writes the result back to the bit field in the 32-bit port.\r
+\r
+ Reads the 32-bit PCI configuration register specified by Address, performs a\r
+ bitwise inclusive OR between the read result and the value specified by\r
+ OrData, and writes the result to the 32-bit PCI configuration register\r
+ specified by Address. The value written to the PCI configuration register is\r
+ returned. This function must guarantee that all PCI read and write operations\r
+ are serialized. Extra left bits in OrData are stripped.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+ If Address is not aligned on a 32-bit boundary, then ASSERT().\r
+ If StartBit is greater than 31, then ASSERT().\r
+ If EndBit is greater than 31, then ASSERT().\r
+ If EndBit is less than StartBit, then ASSERT().\r
+\r
+ @param Address PCI configuration register to write.\r
+ @param StartBit The ordinal of the least significant bit in the bit field.\r
+ Range 0..31.\r
+ @param EndBit The ordinal of the most significant bit in the bit field.\r
+ Range 0..31.\r
+ @param OrData The value to OR with the PCI configuration register.\r
+\r
+ @return The value written back to the PCI configuration register.\r
+\r
+**/\r
+UINT32\r
+EFIAPI\r
+PciBitFieldOr32 (\r
+ IN UINTN Address,\r
+ IN UINTN StartBit,\r
+ IN UINTN EndBit,\r
+ IN UINT32 OrData\r
+ )\r
+{\r
+ return PciWrite32 (\r
+ Address,\r
+ BitFieldOr32 (PciRead32 (Address), StartBit, EndBit, OrData)\r
+ );\r
+}\r
+\r
+/**\r
+ Reads a bit field in a 32-bit PCI configuration register, performs a bitwise\r
+ AND, and writes the result back to the bit field in the 32-bit register.\r
+\r
+ Reads the 32-bit PCI configuration register specified by Address, performs a\r
+ bitwise AND between the read result and the value specified by AndData, and\r
+ writes the result to the 32-bit PCI configuration register specified by\r
+ Address. The value written to the PCI configuration register is returned.\r
+ This function must guarantee that all PCI read and write operations are\r
+ serialized. Extra left bits in AndData are stripped.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+ If Address is not aligned on a 32-bit boundary, then ASSERT().\r
+ If StartBit is greater than 31, then ASSERT().\r
+ If EndBit is greater than 31, then ASSERT().\r
+ If EndBit is less than StartBit, then ASSERT().\r
+\r
+ @param Address PCI configuration register to write.\r
+ @param StartBit The ordinal of the least significant bit in the bit field.\r
+ Range 0..31.\r
+ @param EndBit The ordinal of the most significant bit in the bit field.\r
+ Range 0..31.\r
+ @param AndData The value to AND with the PCI configuration register.\r
+\r
+ @return The value written back to the PCI configuration register.\r
+\r
+**/\r
+UINT32\r
+EFIAPI\r
+PciBitFieldAnd32 (\r
+ IN UINTN Address,\r
+ IN UINTN StartBit,\r
+ IN UINTN EndBit,\r
+ IN UINT32 AndData\r
+ )\r
+{\r
+ return PciWrite32 (\r
+ Address,\r
+ BitFieldAnd32 (PciRead32 (Address), StartBit, EndBit, AndData)\r
+ );\r
+}\r
+\r
+/**\r
+ Reads a bit field in a 32-bit port, performs a bitwise AND followed by a\r
+ bitwise inclusive OR, and writes the result back to the bit field in the\r
+ 32-bit port.\r
+\r
+ Reads the 32-bit PCI configuration register specified by Address, performs a\r
+ bitwise AND followed by a bitwise inclusive OR between the read result and\r
+ the value specified by AndData, and writes the result to the 32-bit PCI\r
+ configuration register specified by Address. The value written to the PCI\r
+ configuration register is returned. This function must guarantee that all PCI\r
+ read and write operations are serialized. Extra left bits in both AndData and\r
+ OrData are stripped.\r
+\r
+ If Address > 0x0FFFFFFF, then ASSERT().\r
+ If Address is not aligned on a 32-bit boundary, then ASSERT().\r
+ If StartBit is greater than 31, then ASSERT().\r
+ If EndBit is greater than 31, then ASSERT().\r
+ If EndBit is less than StartBit, then ASSERT().\r
+\r
+ @param Address PCI configuration register to write.\r
+ @param StartBit The ordinal of the least significant bit in the bit field.\r
+ Range 0..31.\r
+ @param EndBit The ordinal of the most significant bit in the bit field.\r
+ Range 0..31.\r
+ @param AndData The value to AND with the PCI configuration register.\r
+ @param OrData The value to OR with the result of the AND operation.\r
+\r
+ @return The value written back to the PCI configuration register.\r
+\r
+**/\r
+UINT32\r
+EFIAPI\r
+PciBitFieldAndThenOr32 (\r
+ IN UINTN Address,\r
+ IN UINTN StartBit,\r
+ IN UINTN EndBit,\r
+ IN UINT32 AndData,\r
+ IN UINT32 OrData\r
+ )\r
+{\r
+ return PciWrite32 (\r
+ Address,\r
+ BitFieldAndThenOr32 (PciRead32 (Address), StartBit, EndBit, AndData, OrData)\r
+ );\r
+}\r
+\r
+/**\r
+ Reads a range of PCI configuration registers into a caller supplied buffer.\r
+\r
+ Reads the range of PCI configuration registers specified by StartAddress and\r
+ Size into the buffer specified by Buffer. This function only allows the PCI\r
+ configuration registers from a single PCI function to be read. Size is\r
+ returned. When possible 32-bit PCI configuration read cycles are used to read\r
+ from StartAdress to StartAddress + Size. Due to alignment restrictions, 8-bit\r
+ and 16-bit PCI configuration read cycles may be used at the beginning and the\r
+ end of the range.\r
+\r
+ If StartAddress > 0x0FFFFFFF, then ASSERT().\r
+ If ((StartAddress & 0xFFF) + Size) > 0x1000, then ASSERT().\r
+ If Size > 0 and Buffer is NULL, then ASSERT().\r
+\r
+ @param StartAddress Starting address that encodes the PCI Bus, Device,\r
+ Function and Register.\r
+ @param Size Size in bytes of the transfer.\r
+ @param Buffer Pointer to a buffer receiving the data read.\r
+\r
+ @return Size\r
+\r
+**/\r
+UINTN\r
+EFIAPI\r
+PciReadBuffer (\r
+ IN UINTN StartAddress,\r
+ IN UINTN Size,\r
+ OUT VOID *Buffer\r
+ )\r
+{\r
+ UINTN ReturnValue;\r
+\r
+ ASSERT_INVALID_PCI_ADDRESS (StartAddress, 0);\r
+ ASSERT (((StartAddress & 0xFFF) + Size) <= 0x100);\r
+\r
+ if (Size == 0) {\r
+ return Size;\r
+ }\r
+\r
+ ASSERT (Buffer != NULL);\r
+\r
+ //\r
+ // Save Size for return\r
+ //\r
+ ReturnValue = Size;\r
+\r
+ if ((StartAddress & 1) != 0) {\r
+ //\r
+ // Read a byte if StartAddress is byte aligned\r
+ //\r
+ *(volatile UINT8 *)Buffer = PciRead8 (StartAddress);\r
+ StartAddress += sizeof (UINT8);\r
+ Size -= sizeof (UINT8);\r
+ Buffer = (UINT8*)Buffer + 1;\r
+ }\r
+\r
+ if (Size >= sizeof (UINT16) && (StartAddress & 2) != 0) {\r
+ //\r
+ // Read a word if StartAddress is word aligned\r
+ //\r
+ *(volatile UINT16 *)Buffer = PciRead16 (StartAddress);\r
+ StartAddress += sizeof (UINT16);\r
+ Size -= sizeof (UINT16);\r
+ Buffer = (UINT16*)Buffer + 1;\r
+ }\r
+\r
+ while (Size >= sizeof (UINT32)) {\r
+ //\r
+ // Read as many double words as possible\r
+ //\r
+ *(volatile UINT32 *)Buffer = PciRead32 (StartAddress);\r
+ StartAddress += sizeof (UINT32);\r
+ Size -= sizeof (UINT32);\r
+ Buffer = (UINT32*)Buffer + 1;\r
+ }\r
+\r
+ if (Size >= sizeof (UINT16)) {\r
+ //\r
+ // Read the last remaining word if exist\r
+ //\r
+ *(volatile UINT16 *)Buffer = PciRead16 (StartAddress);\r
+ StartAddress += sizeof (UINT16);\r
+ Size -= sizeof (UINT16);\r
+ Buffer = (UINT16*)Buffer + 1;\r
+ }\r
+\r
+ if (Size >= sizeof (UINT8)) {\r
+ //\r
+ // Read the last remaining byte if exist\r
+ //\r
+ *(volatile UINT8 *)Buffer = PciRead8 (StartAddress);\r
+ }\r
+\r
+ return ReturnValue;\r
+}\r
+\r
+/**\r
+ Copies the data in a caller supplied buffer to a specified range of PCI\r
+ configuration space.\r
+\r
+ Writes the range of PCI configuration registers specified by StartAddress and\r
+ Size from the buffer specified by Buffer. This function only allows the PCI\r
+ configuration registers from a single PCI function to be written. Size is\r
+ returned. When possible 32-bit PCI configuration write cycles are used to\r
+ write from StartAdress to StartAddress + Size. Due to alignment restrictions,\r
+ 8-bit and 16-bit PCI configuration write cycles may be used at the beginning\r
+ and the end of the range.\r
+\r
+ If StartAddress > 0x0FFFFFFF, then ASSERT().\r
+ If ((StartAddress & 0xFFF) + Size) > 0x1000, then ASSERT().\r
+ If Size > 0 and Buffer is NULL, then ASSERT().\r
+\r
+ @param StartAddress Starting address that encodes the PCI Bus, Device,\r
+ Function and Register.\r
+ @param Size Size in bytes of the transfer.\r
+ @param Buffer Pointer to a buffer containing the data to write.\r
+\r
+ @return Size\r
+\r
+**/\r
+UINTN\r
+EFIAPI\r
+PciWriteBuffer (\r
+ IN UINTN StartAddress,\r
+ IN UINTN Size,\r
+ IN VOID *Buffer\r
+ )\r
+{\r
+ UINTN ReturnValue;\r
+\r
+ ASSERT_INVALID_PCI_ADDRESS (StartAddress, 0);\r
+ ASSERT (((StartAddress & 0xFFF) + Size) <= 0x100);\r
+\r
+ if (Size == 0) {\r
+ return 0;\r
+ }\r
+\r
+ ASSERT (Buffer != NULL);\r
+\r
+ //\r
+ // Save Size for return\r
+ //\r
+ ReturnValue = Size;\r
+\r
+ if ((StartAddress & 1) != 0) {\r
+ //\r
+ // Write a byte if StartAddress is byte aligned\r
+ //\r
+ PciWrite8 (StartAddress, *(UINT8*)Buffer);\r
+ StartAddress += sizeof (UINT8);\r
+ Size -= sizeof (UINT8);\r
+ Buffer = (UINT8*)Buffer + 1;\r
+ }\r
+\r
+ if (Size >= sizeof (UINT16) && (StartAddress & 2) != 0) {\r
+ //\r
+ // Write a word if StartAddress is word aligned\r
+ //\r
+ PciWrite16 (StartAddress, *(UINT16*)Buffer);\r
+ StartAddress += sizeof (UINT16);\r
+ Size -= sizeof (UINT16);\r
+ Buffer = (UINT16*)Buffer + 1;\r
+ }\r
+\r
+ while (Size >= sizeof (UINT32)) {\r
+ //\r
+ // Write as many double words as possible\r
+ //\r
+ PciWrite32 (StartAddress, *(UINT32*)Buffer);\r
+ StartAddress += sizeof (UINT32);\r
+ Size -= sizeof (UINT32);\r
+ Buffer = (UINT32*)Buffer + 1;\r
+ }\r
+\r
+ if (Size >= sizeof (UINT16)) {\r
+ //\r
+ // Write the last remaining word if exist\r
+ //\r
+ PciWrite16 (StartAddress, *(UINT16*)Buffer);\r
+ StartAddress += sizeof (UINT16);\r
+ Size -= sizeof (UINT16);\r
+ Buffer = (UINT16*)Buffer + 1;\r
+ }\r
+\r
+ if (Size >= sizeof (UINT8)) {\r
+ //\r
+ // Write the last remaining byte if exist\r
+ //\r
+ PciWrite8 (StartAddress, *(UINT8*)Buffer);\r
+ }\r
+\r
+ return ReturnValue;\r
+}\r
projects / mirror_edk2.git / blobdiff