diff options
| author | bbahnsen <bbahnsen@6f19259b-4bc3-4df7-8a09-765794883524> | 2006-04-21 22:54:32 +0000 |
|---|---|---|
| committer | bbahnsen <bbahnsen@6f19259b-4bc3-4df7-8a09-765794883524> | 2006-04-21 22:54:32 +0000 |
| commit | 878ddf1fc3540a715f63594ed22b6929e881afb4 (patch) | |
| tree | c56c44dac138137b510e1fba7c3efe5e4d84bea2 /MdePkg/Library/BasePciCf8Lib/PciLib.c | |
| download | edk2-platforms-878ddf1fc3540a715f63594ed22b6929e881afb4.tar.xz | |
Initial import.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdePkg/Library/BasePciCf8Lib/PciLib.c')
| -rw-r--r-- | MdePkg/Library/BasePciCf8Lib/PciLib.c | 1431 |
1 files changed, 1431 insertions, 0 deletions
diff --git a/MdePkg/Library/BasePciCf8Lib/PciLib.c b/MdePkg/Library/BasePciCf8Lib/PciLib.c new file mode 100644 index 0000000000..c5880bdeee --- /dev/null +++ b/MdePkg/Library/BasePciCf8Lib/PciLib.c @@ -0,0 +1,1431 @@ +/** @file
+ PCI Library.
+
+ Copyright (c) 2006, Intel Corporation<BR>
+ All rights reserved. This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+ Module Name: PciLib.c
+
+**/
+
+//
+// Declare I/O Ports used to perform PCI Confguration Cycles
+//
+#define PCI_CONFIGURATION_ADDRESS_PORT 0xCF8
+#define PCI_CONFIGURATION_DATA_PORT 0xCFC
+
+//
+// Declare macro to convert PCI Library formatted address to CF8 formatted address
+//
+// PCI Library formatted address CF8 Formatted Address
+// ============================= ======================
+// Bits 00..11 Register Bits 00..07 Register
+// Bits 12..14 Function Bits 08..10 Function
+// Bits 15..19 Device Bits 11..15 Device
+// Bits 20..27 Bus Bits 16..23 Bus
+// Bits 28..31 Reserved(MBZ) Bits 24..30 Reserved(MBZ)
+// Bits 31..31 Must be 1
+//
+
+/**
+ Assert the validity of a PCI address. A valid PCI address should contain 1's
+ only in the low 28 bits.
+
+ @param A The address to validate.
+ @param M Additional bits to assert to be zero.
+
+**/
+#define ASSERT_INVALID_PCI_ADDRESS(A,M) \
+ ASSERT (((A) & (~0xffff0ff | (M))) == 0)
+
+/**
+ Convert a PCI Express address to PCI CF8 address.
+
+ @param A The address to convert.
+
+ @retval The coverted address.
+
+**/
+#define PCI_TO_CF8_ADDRESS(A) \
+ ((UINT32)(((A) >> 4) | ((A) & 0xfc) | 0x80000000))
+
+/**
+ Reads an 8-bit PCI configuration register.
+
+ Reads and returns the 8-bit PCI configuration register specified by Address.
+ This function must guarantee that all PCI read and write operations are
+ serialized.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+
+ @param Address Address that encodes the PCI Bus, Device, Function and
+ Register.
+
+ @return The read value from the PCI configuration register.
+
+**/
+UINT8
+EFIAPI
+PciCf8Read8 (
+ IN UINTN Address
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 0);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoRead8 (PCI_CONFIGURATION_DATA_PORT + (UINT16)(Address & 3));
+}
+
+/**
+ Writes an 8-bit PCI configuration register.
+
+ Writes the 8-bit PCI configuration register specified by Address with the
+ value specified by Value. Value is returned. This function must guarantee
+ that all PCI read and write operations are serialized.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+
+ @param Address Address that encodes the PCI Bus, Device, Function and
+ Register.
+ @param Value The value to write.
+
+ @return The value written to the PCI configuration register.
+
+**/
+UINT8
+EFIAPI
+PciCf8Write8 (
+ IN UINTN Address,
+ IN UINT8 Value
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 0);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoWrite8 (
+ PCI_CONFIGURATION_DATA_PORT + (UINT16)(Address & 3),
+ Value
+ );
+}
+
+/**
+ Performs a bitwise inclusive OR of an 8-bit PCI configuration register with
+ an 8-bit value.
+
+ Reads the 8-bit PCI configuration register specified by Address, performs a
+ bitwise inclusive OR between the read result and the value specified by
+ OrData, and writes the result to the 8-bit PCI configuration register
+ specified by Address. The value written to the PCI configuration register is
+ returned. This function must guarantee that all PCI read and write operations
+ are serialized.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+
+ @param Address Address that encodes the PCI Bus, Device, Function and
+ Register.
+ @param OrData The value to OR with the PCI configuration register.
+
+ @return The value written back to the PCI configuration register.
+
+**/
+UINT8
+EFIAPI
+PciCf8Or8 (
+ IN UINTN Address,
+ IN UINT8 OrData
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 0);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoOr8 (
+ PCI_CONFIGURATION_DATA_PORT + (UINT16)(Address & 3),
+ OrData
+ );
+}
+
+/**
+ Performs a bitwise AND of an 8-bit PCI configuration register with an 8-bit
+ value.
+
+ Reads the 8-bit PCI configuration register specified by Address, performs a
+ bitwise AND between the read result and the value specified by AndData, and
+ writes the result to the 8-bit PCI configuration register specified by
+ Address. The value written to the PCI configuration register is returned.
+ This function must guarantee that all PCI read and write operations are
+ serialized.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+
+ @param Address Address that encodes the PCI Bus, Device, Function and
+ Register.
+ @param AndData The value to AND with the PCI configuration register.
+
+ @return The value written back to the PCI configuration register.
+
+**/
+UINT8
+EFIAPI
+PciCf8And8 (
+ IN UINTN Address,
+ IN UINT8 AndData
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 0);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoAnd8 (
+ PCI_CONFIGURATION_DATA_PORT + (UINT16)(Address & 3),
+ AndData
+ );
+}
+
+/**
+ Performs a bitwise AND of an 8-bit PCI configuration register with an 8-bit
+ value, followed a bitwise inclusive OR with another 8-bit value.
+
+ Reads the 8-bit PCI configuration register specified by Address, performs a
+ bitwise AND between the read result and the value specified by AndData,
+ performs a bitwise inclusive OR between the result of the AND operation and
+ the value specified by OrData, and writes the result to the 8-bit PCI
+ configuration register specified by Address. The value written to the PCI
+ configuration register is returned. This function must guarantee that all PCI
+ read and write operations are serialized.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+
+ @param Address Address that encodes the PCI Bus, Device, Function and
+ Register.
+ @param AndData The value to AND with the PCI configuration register.
+ @param OrData The value to OR with the result of the AND operation.
+
+ @return The value written back to the PCI configuration register.
+
+**/
+UINT8
+EFIAPI
+PciCf8AndThenOr8 (
+ IN UINTN Address,
+ IN UINT8 AndData,
+ IN UINT8 OrData
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 0);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoAndThenOr8 (
+ PCI_CONFIGURATION_DATA_PORT + (UINT16)(Address & 3),
+ AndData,
+ OrData
+ );
+}
+
+/**
+ Reads a bit field of a PCI configuration register.
+
+ Reads the bit field in an 8-bit PCI configuration register. The bit field is
+ specified by the StartBit and the EndBit. The value of the bit field is
+ returned.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+ If StartBit is greater than 7, then ASSERT().
+ If EndBit is greater than 7, then ASSERT().
+ If EndBit is less than or equal to StartBit, then ASSERT().
+
+ @param Address PCI configuration register to read.
+ @param StartBit The ordinal of the least significant bit in the bit field.
+ Range 0..7.
+ @param EndBit The ordinal of the most significant bit in the bit field.
+ Range 0..7.
+
+ @return The value of the bit field read from the PCI configuration register.
+
+**/
+UINT8
+EFIAPI
+PciCf8BitFieldRead8 (
+ IN UINTN Address,
+ IN UINTN StartBit,
+ IN UINTN EndBit
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 0);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoBitFieldRead8 (
+ PCI_CONFIGURATION_DATA_PORT + (UINT16)(Address & 3),
+ StartBit,
+ EndBit
+ );
+}
+
+/**
+ Writes a bit field to a PCI configuration register.
+
+ Writes Value to the bit field of the PCI configuration register. The bit
+ field is specified by the StartBit and the EndBit. All other bits in the
+ destination PCI configuration register are preserved. The new value of the
+ 8-bit register is returned.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+ If StartBit is greater than 7, then ASSERT().
+ If EndBit is greater than 7, then ASSERT().
+ If EndBit is less than or equal to StartBit, then ASSERT().
+
+ @param Address PCI configuration register to write.
+ @param StartBit The ordinal of the least significant bit in the bit field.
+ Range 0..7.
+ @param EndBit The ordinal of the most significant bit in the bit field.
+ Range 0..7.
+ @param Value New value of the bit field.
+
+ @return The value written back to the PCI configuration register.
+
+**/
+UINT8
+EFIAPI
+PciCf8BitFieldWrite8 (
+ IN UINTN Address,
+ IN UINTN StartBit,
+ IN UINTN EndBit,
+ IN UINT8 Value
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 0);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoBitFieldWrite8 (
+ PCI_CONFIGURATION_DATA_PORT + (UINT16)(Address & 3),
+ StartBit,
+ EndBit,
+ Value
+ );
+}
+
+/**
+ Reads a bit field in an 8-bit PCI configuration, performs a bitwise OR, and
+ writes the result back to the bit field in the 8-bit port.
+
+ Reads the 8-bit PCI configuration register specified by Address, performs a
+ bitwise inclusive OR between the read result and the value specified by
+ OrData, and writes the result to the 8-bit PCI configuration register
+ specified by Address. The value written to the PCI configuration register is
+ returned. This function must guarantee that all PCI read and write operations
+ are serialized. Extra left bits in OrData are stripped.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+ If StartBit is greater than 7, then ASSERT().
+ If EndBit is greater than 7, then ASSERT().
+ If EndBit is less than or equal to StartBit, then ASSERT().
+
+ @param Address PCI configuration register to write.
+ @param StartBit The ordinal of the least significant bit in the bit field.
+ Range 0..7.
+ @param EndBit The ordinal of the most significant bit in the bit field.
+ Range 0..7.
+ @param OrData The value to OR with the PCI configuration register.
+
+ @return The value written back to the PCI configuration register.
+
+**/
+UINT8
+EFIAPI
+PciCf8BitFieldOr8 (
+ IN UINTN Address,
+ IN UINTN StartBit,
+ IN UINTN EndBit,
+ IN UINT8 OrData
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 0);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoBitFieldOr8 (
+ PCI_CONFIGURATION_DATA_PORT + (UINT16)(Address & 3),
+ StartBit,
+ EndBit,
+ OrData
+ );
+}
+
+/**
+ Reads a bit field in an 8-bit PCI configuration register, performs a bitwise
+ AND, and writes the result back to the bit field in the 8-bit register.
+
+ Reads the 8-bit PCI configuration register specified by Address, performs a
+ bitwise AND between the read result and the value specified by AndData, and
+ writes the result to the 8-bit PCI configuration register specified by
+ Address. The value written to the PCI configuration register is returned.
+ This function must guarantee that all PCI read and write operations are
+ serialized. Extra left bits in AndData are stripped.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+ If StartBit is greater than 7, then ASSERT().
+ If EndBit is greater than 7, then ASSERT().
+ If EndBit is less than or equal to StartBit, then ASSERT().
+
+ @param Address PCI configuration register to write.
+ @param StartBit The ordinal of the least significant bit in the bit field.
+ Range 0..7.
+ @param EndBit The ordinal of the most significant bit in the bit field.
+ Range 0..7.
+ @param AndData The value to AND with the PCI configuration register.
+
+ @return The value written back to the PCI configuration register.
+
+**/
+UINT8
+EFIAPI
+PciCf8BitFieldAnd8 (
+ IN UINTN Address,
+ IN UINTN StartBit,
+ IN UINTN EndBit,
+ IN UINT8 AndData
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 0);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoBitFieldAnd8 (
+ PCI_CONFIGURATION_DATA_PORT + (UINT16)(Address & 3),
+ StartBit,
+ EndBit,
+ AndData
+ );
+}
+
+/**
+ Reads a bit field in an 8-bit port, performs a bitwise AND followed by a
+ bitwise inclusive OR, and writes the result back to the bit field in the
+ 8-bit port.
+
+ Reads the 8-bit PCI configuration register specified by Address, performs a
+ bitwise AND followed by a bitwise inclusive OR between the read result and
+ the value specified by AndData, and writes the result to the 8-bit PCI
+ configuration register specified by Address. The value written to the PCI
+ configuration register is returned. This function must guarantee that all PCI
+ read and write operations are serialized. Extra left bits in both AndData and
+ OrData are stripped.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+ If StartBit is greater than 7, then ASSERT().
+ If EndBit is greater than 7, then ASSERT().
+ If EndBit is less than or equal to StartBit, then ASSERT().
+
+ @param Address PCI configuration register to write.
+ @param StartBit The ordinal of the least significant bit in the bit field.
+ Range 0..7.
+ @param EndBit The ordinal of the most significant bit in the bit field.
+ Range 0..7.
+ @param AndData The value to AND with the PCI configuration register.
+ @param OrData The value to OR with the result of the AND operation.
+
+ @return The value written back to the PCI configuration register.
+
+**/
+UINT8
+EFIAPI
+PciCf8BitFieldAndThenOr8(
+ IN UINTN Address,
+ IN UINTN StartBit,
+ IN UINTN EndBit,
+ IN UINT8 AndData,
+ IN UINT8 OrData
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 0);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoBitFieldAndThenOr8 (
+ PCI_CONFIGURATION_DATA_PORT + (UINT16)(Address & 3),
+ StartBit,
+ EndBit,
+ AndData,
+ OrData
+ );
+}
+
+/**
+ Reads a 16-bit PCI configuration register.
+
+ Reads and returns the 16-bit PCI configuration register specified by Address.
+ This function must guarantee that all PCI read and write operations are
+ serialized.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If Address is not aligned on a 16-bit boundary, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+
+ @param Address Address that encodes the PCI Bus, Device, Function and
+ Register.
+
+ @return The read value from the PCI configuration register.
+
+**/
+UINT16
+EFIAPI
+PciCf8Read16 (
+ IN UINTN Address
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 1);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoRead16 (PCI_CONFIGURATION_DATA_PORT + (UINT16)(Address & 2));
+}
+
+/**
+ Writes a 16-bit PCI configuration register.
+
+ Writes the 16-bit PCI configuration register specified by Address with the
+ value specified by Value. Value is returned. This function must guarantee
+ that all PCI read and write operations are serialized.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If Address is not aligned on a 16-bit boundary, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+
+ @param Address Address that encodes the PCI Bus, Device, Function and
+ Register.
+ @param Value The value to write.
+
+ @return The value written to the PCI configuration register.
+
+**/
+UINT16
+EFIAPI
+PciCf8Write16 (
+ IN UINTN Address,
+ IN UINT16 Value
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 1);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoWrite16 (
+ PCI_CONFIGURATION_DATA_PORT + (UINT16)(Address & 2),
+ Value
+ );
+}
+
+/**
+ Performs a bitwise inclusive OR of a 16-bit PCI configuration register with
+ a 16-bit value.
+
+ Reads the 16-bit PCI configuration register specified by Address, performs a
+ bitwise inclusive OR between the read result and the value specified by
+ OrData, and writes the result to the 16-bit PCI configuration register
+ specified by Address. The value written to the PCI configuration register is
+ returned. This function must guarantee that all PCI read and write operations
+ are serialized.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If Address is not aligned on a 16-bit boundary, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+
+ @param Address Address that encodes the PCI Bus, Device, Function and
+ Register.
+ @param OrData The value to OR with the PCI configuration register.
+
+ @return The value written back to the PCI configuration register.
+
+**/
+UINT16
+EFIAPI
+PciCf8Or16 (
+ IN UINTN Address,
+ IN UINT16 OrData
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 1);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoOr16 (
+ PCI_CONFIGURATION_DATA_PORT + (UINT16)(Address & 2),
+ OrData
+ );
+}
+
+/**
+ Performs a bitwise AND of a 16-bit PCI configuration register with a 16-bit
+ value.
+
+ Reads the 16-bit PCI configuration register specified by Address, performs a
+ bitwise AND between the read result and the value specified by AndData, and
+ writes the result to the 16-bit PCI configuration register specified by
+ Address. The value written to the PCI configuration register is returned.
+ This function must guarantee that all PCI read and write operations are
+ serialized.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If Address is not aligned on a 16-bit boundary, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+
+ @param Address Address that encodes the PCI Bus, Device, Function and
+ Register.
+ @param AndData The value to AND with the PCI configuration register.
+
+ @return The value written back to the PCI configuration register.
+
+**/
+UINT16
+EFIAPI
+PciCf8And16 (
+ IN UINTN Address,
+ IN UINT16 AndData
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 1);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoAnd16 (
+ PCI_CONFIGURATION_DATA_PORT + (UINT16)(Address & 2),
+ AndData
+ );
+}
+
+/**
+ Performs a bitwise AND of a 16-bit PCI configuration register with a 16-bit
+ value, followed a bitwise inclusive OR with another 16-bit value.
+
+ Reads the 16-bit PCI configuration register specified by Address, performs a
+ bitwise AND between the read result and the value specified by AndData,
+ performs a bitwise inclusive OR between the result of the AND operation and
+ the value specified by OrData, and writes the result to the 16-bit PCI
+ configuration register specified by Address. The value written to the PCI
+ configuration register is returned. This function must guarantee that all PCI
+ read and write operations are serialized.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If Address is not aligned on a 16-bit boundary, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+
+ @param Address Address that encodes the PCI Bus, Device, Function and
+ Register.
+ @param AndData The value to AND with the PCI configuration register.
+ @param OrData The value to OR with the result of the AND operation.
+
+ @return The value written back to the PCI configuration register.
+
+**/
+UINT16
+EFIAPI
+PciCf8AndThenOr16 (
+ IN UINTN Address,
+ IN UINT16 AndData,
+ IN UINT16 OrData
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 1);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoAndThenOr16 (
+ PCI_CONFIGURATION_DATA_PORT + (UINT16)(Address & 2),
+ AndData,
+ OrData
+ );
+}
+
+/**
+ Reads a bit field of a PCI configuration register.
+
+ Reads the bit field in a 16-bit PCI configuration register. The bit field is
+ specified by the StartBit and the EndBit. The value of the bit field is
+ returned.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If Address is not aligned on a 16-bit boundary, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+ If StartBit is greater than 15, then ASSERT().
+ If EndBit is greater than 15, then ASSERT().
+ If EndBit is less than or equal to StartBit, then ASSERT().
+
+ @param Address PCI configuration register to read.
+ @param StartBit The ordinal of the least significant bit in the bit field.
+ Range 0..15.
+ @param EndBit The ordinal of the most significant bit in the bit field.
+ Range 0..15.
+
+ @return The value of the bit field read from the PCI configuration register.
+
+**/
+UINT16
+EFIAPI
+PciCf8BitFieldRead16 (
+ IN UINTN Address,
+ IN UINTN StartBit,
+ IN UINTN EndBit
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 1);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoBitFieldRead16 (
+ PCI_CONFIGURATION_DATA_PORT + (UINT16)(Address & 2),
+ StartBit,
+ EndBit
+ );
+}
+
+/**
+ Writes a bit field to a PCI configuration register.
+
+ Writes Value to the bit field of the PCI configuration register. The bit
+ field is specified by the StartBit and the EndBit. All other bits in the
+ destination PCI configuration register are preserved. The new value of the
+ 16-bit register is returned.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If Address is not aligned on a 16-bit boundary, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+ If StartBit is greater than 15, then ASSERT().
+ If EndBit is greater than 15, then ASSERT().
+ If EndBit is less than or equal to StartBit, then ASSERT().
+
+ @param Address PCI configuration register to write.
+ @param StartBit The ordinal of the least significant bit in the bit field.
+ Range 0..15.
+ @param EndBit The ordinal of the most significant bit in the bit field.
+ Range 0..15.
+ @param Value New value of the bit field.
+
+ @return The value written back to the PCI configuration register.
+
+**/
+UINT16
+EFIAPI
+PciCf8BitFieldWrite16 (
+ IN UINTN Address,
+ IN UINTN StartBit,
+ IN UINTN EndBit,
+ IN UINT16 Value
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 1);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoBitFieldWrite16 (
+ PCI_CONFIGURATION_DATA_PORT + (UINT16)(Address & 2),
+ StartBit,
+ EndBit,
+ Value
+ );
+}
+
+/**
+ Reads a bit field in a 16-bit PCI configuration, performs a bitwise OR, and
+ writes the result back to the bit field in the 16-bit port.
+
+ Reads the 16-bit PCI configuration register specified by Address, performs a
+ bitwise inclusive OR between the read result and the value specified by
+ OrData, and writes the result to the 16-bit PCI configuration register
+ specified by Address. The value written to the PCI configuration register is
+ returned. This function must guarantee that all PCI read and write operations
+ are serialized. Extra left bits in OrData are stripped.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If Address is not aligned on a 16-bit boundary, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+ If StartBit is greater than 15, then ASSERT().
+ If EndBit is greater than 15, then ASSERT().
+ If EndBit is less than or equal to StartBit, then ASSERT().
+
+ @param Address PCI configuration register to write.
+ @param StartBit The ordinal of the least significant bit in the bit field.
+ Range 0..15.
+ @param EndBit The ordinal of the most significant bit in the bit field.
+ Range 0..15.
+ @param OrData The value to OR with the PCI configuration register.
+
+ @return The value written back to the PCI configuration register.
+
+**/
+UINT16
+EFIAPI
+PciCf8BitFieldOr16 (
+ IN UINTN Address,
+ IN UINTN StartBit,
+ IN UINTN EndBit,
+ IN UINT16 OrData
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 1);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoBitFieldOr16 (
+ PCI_CONFIGURATION_DATA_PORT + (UINT16)(Address & 2),
+ StartBit,
+ EndBit,
+ OrData
+ );
+}
+
+/**
+ Reads a bit field in a 16-bit PCI configuration register, performs a bitwise
+ AND, and writes the result back to the bit field in the 16-bit register.
+
+ Reads the 16-bit PCI configuration register specified by Address, performs a
+ bitwise AND between the read result and the value specified by AndData, and
+ writes the result to the 16-bit PCI configuration register specified by
+ Address. The value written to the PCI configuration register is returned.
+ This function must guarantee that all PCI read and write operations are
+ serialized. Extra left bits in AndData are stripped.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If Address is not aligned on a 16-bit boundary, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+ If StartBit is greater than 15, then ASSERT().
+ If EndBit is greater than 15, then ASSERT().
+ If EndBit is less than or equal to StartBit, then ASSERT().
+
+ @param Address PCI configuration register to write.
+ @param StartBit The ordinal of the least significant bit in the bit field.
+ Range 0..15.
+ @param EndBit The ordinal of the most significant bit in the bit field.
+ Range 0..15.
+ @param AndData The value to AND with the PCI configuration register.
+
+ @return The value written back to the PCI configuration register.
+
+**/
+UINT16
+EFIAPI
+PciCf8BitFieldAnd16 (
+ IN UINTN Address,
+ IN UINTN StartBit,
+ IN UINTN EndBit,
+ IN UINT16 AndData
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 1);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoBitFieldAnd16 (
+ PCI_CONFIGURATION_DATA_PORT + (UINT16)(Address & 2),
+ StartBit,
+ EndBit,
+ AndData
+ );
+}
+
+/**
+ Reads a bit field in a 16-bit port, performs a bitwise AND followed by a
+ bitwise inclusive OR, and writes the result back to the bit field in the
+ 16-bit port.
+
+ Reads the 16-bit PCI configuration register specified by Address, performs a
+ bitwise AND followed by a bitwise inclusive OR between the read result and
+ the value specified by AndData, and writes the result to the 16-bit PCI
+ configuration register specified by Address. The value written to the PCI
+ configuration register is returned. This function must guarantee that all PCI
+ read and write operations are serialized. Extra left bits in both AndData and
+ OrData are stripped.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If Address is not aligned on a 16-bit boundary, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+ If StartBit is greater than 15, then ASSERT().
+ If EndBit is greater than 15, then ASSERT().
+ If EndBit is less than or equal to StartBit, then ASSERT().
+
+ @param Address PCI configuration register to write.
+ @param StartBit The ordinal of the least significant bit in the bit field.
+ Range 0..15.
+ @param EndBit The ordinal of the most significant bit in the bit field.
+ Range 0..15.
+ @param AndData The value to AND with the PCI configuration register.
+ @param OrData The value to OR with the result of the AND operation.
+
+ @return The value written back to the PCI configuration register.
+
+**/
+UINT16
+EFIAPI
+PciCf8BitFieldAndThenOr16(
+ IN UINTN Address,
+ IN UINTN StartBit,
+ IN UINTN EndBit,
+ IN UINT16 AndData,
+ IN UINT16 OrData
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 1);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoBitFieldAndThenOr16 (
+ PCI_CONFIGURATION_DATA_PORT + (UINT16)(Address & 2),
+ StartBit,
+ EndBit,
+ AndData,
+ OrData
+ );
+}
+
+/**
+ Reads a 32-bit PCI configuration register.
+
+ Reads and returns the 32-bit PCI configuration register specified by Address.
+ This function must guarantee that all PCI read and write operations are
+ serialized.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If Address is not aligned on a 32-bit boundary, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+
+ @param Address Address that encodes the PCI Bus, Device, Function and
+ Register.
+
+ @return The read value from the PCI configuration register.
+
+**/
+UINT32
+EFIAPI
+PciCf8Read32 (
+ IN UINTN Address
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 3);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoRead32 (PCI_CONFIGURATION_DATA_PORT);
+}
+
+/**
+ Writes a 32-bit PCI configuration register.
+
+ Writes the 32-bit PCI configuration register specified by Address with the
+ value specified by Value. Value is returned. This function must guarantee
+ that all PCI read and write operations are serialized.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If Address is not aligned on a 32-bit boundary, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+
+ @param Address Address that encodes the PCI Bus, Device, Function and
+ Register.
+ @param Value The value to write.
+
+ @return The value written to the PCI configuration register.
+
+**/
+UINT32
+EFIAPI
+PciCf8Write32 (
+ IN UINTN Address,
+ IN UINT32 Value
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 3);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoWrite32 (
+ PCI_CONFIGURATION_DATA_PORT,
+ Value
+ );
+}
+
+/**
+ Performs a bitwise inclusive OR of a 32-bit PCI configuration register with
+ a 32-bit value.
+
+ Reads the 32-bit PCI configuration register specified by Address, performs a
+ bitwise inclusive OR between the read result and the value specified by
+ OrData, and writes the result to the 32-bit PCI configuration register
+ specified by Address. The value written to the PCI configuration register is
+ returned. This function must guarantee that all PCI read and write operations
+ are serialized.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If Address is not aligned on a 32-bit boundary, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+
+ @param Address Address that encodes the PCI Bus, Device, Function and
+ Register.
+ @param OrData The value to OR with the PCI configuration register.
+
+ @return The value written back to the PCI configuration register.
+
+**/
+UINT32
+EFIAPI
+PciCf8Or32 (
+ IN UINTN Address,
+ IN UINT32 OrData
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 3);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoOr32 (
+ PCI_CONFIGURATION_DATA_PORT,
+ OrData
+ );
+}
+
+/**
+ Performs a bitwise AND of a 32-bit PCI configuration register with a 32-bit
+ value.
+
+ Reads the 32-bit PCI configuration register specified by Address, performs a
+ bitwise AND between the read result and the value specified by AndData, and
+ writes the result to the 32-bit PCI configuration register specified by
+ Address. The value written to the PCI configuration register is returned.
+ This function must guarantee that all PCI read and write operations are
+ serialized.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If Address is not aligned on a 32-bit boundary, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+
+ @param Address Address that encodes the PCI Bus, Device, Function and
+ Register.
+ @param AndData The value to AND with the PCI configuration register.
+
+ @return The value written back to the PCI configuration register.
+
+**/
+UINT32
+EFIAPI
+PciCf8And32 (
+ IN UINTN Address,
+ IN UINT32 AndData
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 3);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoAnd32 (
+ PCI_CONFIGURATION_DATA_PORT,
+ AndData
+ );
+}
+
+/**
+ Performs a bitwise AND of a 32-bit PCI configuration register with a 32-bit
+ value, followed a bitwise inclusive OR with another 32-bit value.
+
+ Reads the 32-bit PCI configuration register specified by Address, performs a
+ bitwise AND between the read result and the value specified by AndData,
+ performs a bitwise inclusive OR between the result of the AND operation and
+ the value specified by OrData, and writes the result to the 32-bit PCI
+ configuration register specified by Address. The value written to the PCI
+ configuration register is returned. This function must guarantee that all PCI
+ read and write operations are serialized.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If Address is not aligned on a 32-bit boundary, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+
+ @param Address Address that encodes the PCI Bus, Device, Function and
+ Register.
+ @param AndData The value to AND with the PCI configuration register.
+ @param OrData The value to OR with the result of the AND operation.
+
+ @return The value written back to the PCI configuration register.
+
+**/
+UINT32
+EFIAPI
+PciCf8AndThenOr32 (
+ IN UINTN Address,
+ IN UINT32 AndData,
+ IN UINT32 OrData
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 3);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoAndThenOr32 (
+ PCI_CONFIGURATION_DATA_PORT,
+ AndData,
+ OrData
+ );
+}
+
+/**
+ Reads a bit field of a PCI configuration register.
+
+ Reads the bit field in a 32-bit PCI configuration register. The bit field is
+ specified by the StartBit and the EndBit. The value of the bit field is
+ returned.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If Address is not aligned on a 32-bit boundary, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+ If StartBit is greater than 31, then ASSERT().
+ If EndBit is greater than 31, then ASSERT().
+ If EndBit is less than or equal to StartBit, then ASSERT().
+
+ @param Address PCI configuration register to read.
+ @param StartBit The ordinal of the least significant bit in the bit field.
+ Range 0..31.
+ @param EndBit The ordinal of the most significant bit in the bit field.
+ Range 0..31.
+
+ @return The value of the bit field read from the PCI configuration register.
+
+**/
+UINT32
+EFIAPI
+PciCf8BitFieldRead32 (
+ IN UINTN Address,
+ IN UINTN StartBit,
+ IN UINTN EndBit
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 3);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoBitFieldRead32 (
+ PCI_CONFIGURATION_DATA_PORT,
+ StartBit,
+ EndBit
+ );
+}
+
+/**
+ Writes a bit field to a PCI configuration register.
+
+ Writes Value to the bit field of the PCI configuration register. The bit
+ field is specified by the StartBit and the EndBit. All other bits in the
+ destination PCI configuration register are preserved. The new value of the
+ 32-bit register is returned.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If Address is not aligned on a 32-bit boundary, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+ If StartBit is greater than 31, then ASSERT().
+ If EndBit is greater than 31, then ASSERT().
+ If EndBit is less than or equal to StartBit, then ASSERT().
+
+ @param Address PCI configuration register to write.
+ @param StartBit The ordinal of the least significant bit in the bit field.
+ Range 0..31.
+ @param EndBit The ordinal of the most significant bit in the bit field.
+ Range 0..31.
+ @param Value New value of the bit field.
+
+ @return The value written back to the PCI configuration register.
+
+**/
+UINT32
+EFIAPI
+PciCf8BitFieldWrite32 (
+ IN UINTN Address,
+ IN UINTN StartBit,
+ IN UINTN EndBit,
+ IN UINT32 Value
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 3);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoBitFieldWrite32 (
+ PCI_CONFIGURATION_DATA_PORT,
+ StartBit,
+ EndBit,
+ Value
+ );
+}
+
+/**
+ Reads a bit field in a 32-bit PCI configuration, performs a bitwise OR, and
+ writes the result back to the bit field in the 32-bit port.
+
+ Reads the 32-bit PCI configuration register specified by Address, performs a
+ bitwise inclusive OR between the read result and the value specified by
+ OrData, and writes the result to the 32-bit PCI configuration register
+ specified by Address. The value written to the PCI configuration register is
+ returned. This function must guarantee that all PCI read and write operations
+ are serialized. Extra left bits in OrData are stripped.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If Address is not aligned on a 32-bit boundary, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+ If StartBit is greater than 31, then ASSERT().
+ If EndBit is greater than 31, then ASSERT().
+ If EndBit is less than or equal to StartBit, then ASSERT().
+
+ @param Address PCI configuration register to write.
+ @param StartBit The ordinal of the least significant bit in the bit field.
+ Range 0..31.
+ @param EndBit The ordinal of the most significant bit in the bit field.
+ Range 0..31.
+ @param OrData The value to OR with the PCI configuration register.
+
+ @return The value written back to the PCI configuration register.
+
+**/
+UINT32
+EFIAPI
+PciCf8BitFieldOr32 (
+ IN UINTN Address,
+ IN UINTN StartBit,
+ IN UINTN EndBit,
+ IN UINT32 OrData
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 3);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoBitFieldOr32 (
+ PCI_CONFIGURATION_DATA_PORT,
+ StartBit,
+ EndBit,
+ OrData
+ );
+}
+
+/**
+ Reads a bit field in a 32-bit PCI configuration register, performs a bitwise
+ AND, and writes the result back to the bit field in the 32-bit register.
+
+ Reads the 32-bit PCI configuration register specified by Address, performs a
+ bitwise AND between the read result and the value specified by AndData, and
+ writes the result to the 32-bit PCI configuration register specified by
+ Address. The value written to the PCI configuration register is returned.
+ This function must guarantee that all PCI read and write operations are
+ serialized. Extra left bits in AndData are stripped.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If Address is not aligned on a 32-bit boundary, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+ If StartBit is greater than 31, then ASSERT().
+ If EndBit is greater than 31, then ASSERT().
+ If EndBit is less than or equal to StartBit, then ASSERT().
+
+ @param Address PCI configuration register to write.
+ @param StartBit The ordinal of the least significant bit in the bit field.
+ Range 0..31.
+ @param EndBit The ordinal of the most significant bit in the bit field.
+ Range 0..31.
+ @param AndData The value to AND with the PCI configuration register.
+
+ @return The value written back to the PCI configuration register.
+
+**/
+UINT32
+EFIAPI
+PciCf8BitFieldAnd32 (
+ IN UINTN Address,
+ IN UINTN StartBit,
+ IN UINTN EndBit,
+ IN UINT32 AndData
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 3);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoBitFieldAnd32 (
+ PCI_CONFIGURATION_DATA_PORT,
+ StartBit,
+ EndBit,
+ AndData
+ );
+}
+
+/**
+ Reads a bit field in a 32-bit port, performs a bitwise AND followed by a
+ bitwise inclusive OR, and writes the result back to the bit field in the
+ 32-bit port.
+
+ Reads the 32-bit PCI configuration register specified by Address, performs a
+ bitwise AND followed by a bitwise inclusive OR between the read result and
+ the value specified by AndData, and writes the result to the 32-bit PCI
+ configuration register specified by Address. The value written to the PCI
+ configuration register is returned. This function must guarantee that all PCI
+ read and write operations are serialized. Extra left bits in both AndData and
+ OrData are stripped.
+
+ If Address > 0x0FFFFFFF, then ASSERT().
+ If Address is not aligned on a 32-bit boundary, then ASSERT().
+ If the register specified by Address >= 0x100, then ASSERT().
+ If StartBit is greater than 31, then ASSERT().
+ If EndBit is greater than 31, then ASSERT().
+ If EndBit is less than or equal to StartBit, then ASSERT().
+
+ @param Address PCI configuration register to write.
+ @param StartBit The ordinal of the least significant bit in the bit field.
+ Range 0..31.
+ @param EndBit The ordinal of the most significant bit in the bit field.
+ Range 0..31.
+ @param AndData The value to AND with the PCI configuration register.
+ @param OrData The value to OR with the result of the AND operation.
+
+ @return The value written back to the PCI configuration register.
+
+**/
+UINT32
+EFIAPI
+PciCf8BitFieldAndThenOr32(
+ IN UINTN Address,
+ IN UINTN StartBit,
+ IN UINTN EndBit,
+ IN UINT32 AndData,
+ IN UINT32 OrData
+ )
+{
+ ASSERT_INVALID_PCI_ADDRESS (Address, 3);
+ IoWrite32 (PCI_CONFIGURATION_ADDRESS_PORT, PCI_TO_CF8_ADDRESS (Address));
+ return IoBitFieldAndThenOr32 (
+ PCI_CONFIGURATION_DATA_PORT,
+ StartBit,
+ EndBit,
+ AndData,
+ OrData
+ );
+}
+
+/**
+ Reads a range of PCI configuration registers into a caller supplied buffer.
+
+ Reads the range of PCI configuration registers specified by StartAddress and
+ Size into the buffer specified by Buffer. This function only allows the PCI
+ configuration registers from a single PCI function to be read. Size is
+ returned. When possible 32-bit PCI configuration read cycles are used to read
+ from StartAdress to StartAddress + Size. Due to alignment restrictions, 8-bit
+ and 16-bit PCI configuration read cycles may be used at the beginning and the
+ end of the range.
+
+ If StartAddress > 0x0FFFFFFF, then ASSERT().
+ If the register specified by StartAddress >= 0x100, then ASSERT().
+ If ((StartAddress & 0xFFF) + Size) > 0x100, then ASSERT().
+ If (StartAddress + Size - 1) > 0x0FFFFFFF, then ASSERT().
+ If Buffer is NULL, then ASSERT().
+
+ @param StartAddress Starting address that encodes the PCI Bus, Device,
+ Function and Register.
+ @param Size Size in bytes of the transfer.
+ @param Buffer Pointer to a buffer receiving the data read.
+
+ @return Size
+
+**/
+UINTN
+EFIAPI
+PciCf8ReadBuffer (
+ IN UINTN StartAddress,
+ IN UINTN Size,
+ OUT VOID *Buffer
+ )
+{
+ UINTN EndAddress;
+
+ EndAddress = StartAddress + Size;
+
+ if (StartAddress < EndAddress && (StartAddress & 1)) {
+ //
+ // Read a byte if StartAddress is byte aligned
+ //
+ *(UINT8*)Buffer = PciCf8Read8 (StartAddress);
+ StartAddress += sizeof (UINT8);
+ Buffer = (UINT8*)Buffer + 1;
+ }
+
+ if (StartAddress < EndAddress && (StartAddress & 2)) {
+ //
+ // Read a word if StartAddress is word aligned
+ //
+ *(UINT16*)Buffer = PciCf8Read16 (StartAddress);
+ StartAddress += sizeof (UINT16);
+ Buffer = (UINT16*)Buffer + 1;
+ }
+
+ while (EndAddress - StartAddress >= 4) {
+ //
+ // Read as many double words as possible
+ //
+ *(UINT32*)Buffer = PciCf8Read32 (StartAddress);
+ StartAddress += sizeof (UINT32);
+ Buffer = (UINT32*)Buffer + 1;
+ }
+
+ if ((EndAddress & 2) != 0) {
+ //
+ // Read the last remaining word if exist
+ //
+ *(UINT16*)Buffer = PciCf8Read16 (StartAddress);
+ StartAddress += sizeof (UINT16);
+ Buffer = (UINT16*)Buffer + 1;
+ }
+
+ if (EndAddress & 1) {
+ //
+ // Read the last remaining byte if exist
+ //
+ *(UINT8*)Buffer = PciCf8Read8 (StartAddress);
+ }
+
+ return Size;
+}
+
+/**
+ Copies the data in a caller supplied buffer to a specified range of PCI
+ configuration space.
+
+ Writes the range of PCI configuration registers specified by StartAddress and
+ Size from the buffer specified by Buffer. This function only allows the PCI
+ configuration registers from a single PCI function to be written. Size is
+ returned. When possible 32-bit PCI configuration write cycles are used to
+ write from StartAdress to StartAddress + Size. Due to alignment restrictions,
+ 8-bit and 16-bit PCI configuration write cycles may be used at the beginning
+ and the end of the range.
+
+ If StartAddress > 0x0FFFFFFF, then ASSERT().
+ If the register specified by StartAddress >= 0x100, then ASSERT().
+ If ((StartAddress & 0xFFF) + Size) > 0x100, then ASSERT().
+ If (StartAddress + Size - 1) > 0x0FFFFFFF, then ASSERT().
+ If Buffer is NULL, then ASSERT().
+
+ @param StartAddress Starting address that encodes the PCI Bus, Device,
+ Function and Register.
+ @param Size Size in bytes of the transfer.
+ @param Buffer Pointer to a buffer containing the data to write.
+
+ @return Size
+
+**/
+UINTN
+EFIAPI
+PciCf8WriteBuffer (
+ IN UINTN StartAddress,
+ IN UINTN Size,
+ IN VOID *Buffer
+ )
+{
+ UINTN EndAddress;
+
+ EndAddress = StartAddress + Size;
+
+ if ((StartAddress < EndAddress) && ((StartAddress & 1)!= 0)) {
+ //
+ // Write a byte if StartAddress is byte aligned
+ //
+ PciCf8Write8 (StartAddress, *(UINT8*)Buffer);
+ StartAddress += sizeof (UINT8);
+ Buffer = (UINT8*)Buffer + 1;
+ }
+
+ if (StartAddress < EndAddress && (StartAddress & 2)) {
+ //
+ // Write a word if StartAddress is word aligned
+ //
+ PciCf8Write16 (StartAddress, *(UINT16*)Buffer);
+ StartAddress += sizeof (UINT16);
+ Buffer = (UINT16*)Buffer + 1;
+ }
+
+ while (EndAddress - StartAddress >= 4) {
+ //
+ // Write as many double words as possible
+ //
+ PciCf8Write32 (StartAddress, *(UINT32*)Buffer);
+ StartAddress += sizeof (UINT32);
+ Buffer = (UINT32*)Buffer + 1;
+ }
+
+ if (EndAddress & 2) {
+ //
+ // Write the last remaining word if exist
+ //
+ PciCf8Write16 (StartAddress, *(UINT16*)Buffer);
+ StartAddress += sizeof (UINT16);
+ Buffer = (UINT16*)Buffer + 1;
+ }
+
+ if (EndAddress & 1) {
+ //
+ // Write the last remaining byte if exist
+ //
+ PciCf8Write8 (StartAddress, *(UINT8*)Buffer);
+ }
+
+ return Size;
+}
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