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system76-edk2/MdePkg/Library/DxeRuntimePciExpressLib/PciExpressLib.c

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/** @file
Functions in this library instance make use of MMIO functions in IoLib to
access memory mapped PCI configuration space.
All assertions for I/O operations are handled in MMIO functions in the IoLib
Library.
Copyright (c) 2006 - 2008, 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.
**/
#include <PiDxe.h>
#include <Library/BaseLib.h>
#include <Library/PciExpressLib.h>
#include <Library/IoLib.h>
#include <Library/DebugLib.h>
#include <Library/PcdLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/DxeServicesTableLib.h>
#include <Library/UefiRuntimeLib.h>
///
/// Define table for mapping PCI Express MMIO physical addresses to virtual addresses at OS runtime
///
typedef struct {
UINTN PhysicalAddress;
UINTN VirtualAddress;
} PCI_EXPRESS_RUNTIME_REGISTRATION_TABLE;
///
/// Set Virtual Address Map Event
///
EFI_EVENT mDxeRuntimePciExpressLibVirtualNotifyEvent = NULL;
///
/// Module global that contains the base physical address of the PCI Express MMIO range
///
UINTN mDxeRuntimePciExpressLibPciExpressBaseAddress = 0;
///
/// The number of PCI devices that have been registered for runtime access
///
UINTN mDxeRuntimePciExpressLibNumberOfRuntimeRanges = 0;
///
/// The table of PCI devices that have been registered for runtime access
///
PCI_EXPRESS_RUNTIME_REGISTRATION_TABLE *mDxeRuntimePciExpressLibRegistrationTable = NULL;
///
/// The table index of the most recent virtual address lookup
///
UINTN mDxeRuntimePciExpressLibLastRuntimeRange = 0;
/**
Convert the physical PCI Express MMIO addresses for all registered PCI devices
to virtual addresses.
@param[in] Event The Event that is being processed
@param[in] Context Event Context
**/
VOID
EFIAPI
DxeRuntimePciExpressLibVirtualNotify (
IN EFI_EVENT Event,
IN VOID *Context
)
{
UINTN Index;
//
// If there have been no runtime registrations, then just return
//
if (mDxeRuntimePciExpressLibRegistrationTable == NULL) {
return;
}
//
// Convert physical addresses associated with the set of registered PCI devices to
// virtual addresses.
//
for (Index = 0; Index < mDxeRuntimePciExpressLibNumberOfRuntimeRanges; Index++) {
EfiConvertPointer (0, (VOID **) &(mDxeRuntimePciExpressLibRegistrationTable[Index].VirtualAddress));
}
//
// Convert table pointer that is allocated from EfiRuntimeServicesData to a virtual address.
//
EfiConvertPointer (0, (VOID **) &mDxeRuntimePciExpressLibRegistrationTable);
}
/**
The constructor function caches the PCI Express Base Address and creates a
Set Virtual Address Map event to convert physical address to virtual addresses.
@param ImageHandle The firmware allocated handle for the EFI image.
@param SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The constructor completed successfully.
@retval Other value The constructor did not complete successfully.
**/
EFI_STATUS
EFIAPI
DxeRuntimePciExpressLibConstructor (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
//
// Cache the physical address of the PCI Express MMIO range into a module global variable
//
mDxeRuntimePciExpressLibPciExpressBaseAddress = (UINTN) PcdGet64 (PcdPciExpressBaseAddress);
//
// Register SetVirtualAddressMap () notify function
//
Status = gBS->CreateEvent (
EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE,
TPL_NOTIFY,
DxeRuntimePciExpressLibVirtualNotify,
NULL,
&mDxeRuntimePciExpressLibVirtualNotifyEvent
);
ASSERT_EFI_ERROR (Status);
return Status;
}
/**
The destructor function frees any allocated buffers and closes the Set Virtual
Address Map event.
@param ImageHandle The firmware allocated handle for the EFI image.
@param SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The destructor completed successfully.
@retval Other value The destructor did not complete successfully.
**/
EFI_STATUS
EFIAPI
DxeRuntimePciExpressLibDestructor (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
//
// If one or more PCI devices have been registered for runtime access, then
// free the registration table.
//
if (mDxeRuntimePciExpressLibRegistrationTable != NULL) {
FreePool (mDxeRuntimePciExpressLibRegistrationTable);
}
//
// Close the Set Virtual Address Map event
//
Status = gBS->CloseEvent (mDxeRuntimePciExpressLibVirtualNotifyEvent);
ASSERT_EFI_ERROR (Status);
return Status;
}
/**
Gets the base address of PCI Express.
This internal functions retrieves PCI Express Base Address via a PCD entry
PcdPciExpressBaseAddress.
@return The base address of PCI Express.
**/
UINTN
GetPciExpressAddress (
IN UINTN Address
)
{
UINTN Index;
//
// Make sure Address is valid
//
ASSERT (((Address) & ~0xfffffff) == 0);
//
// Convert Address to a physical address in the MMIO PCI Express range
//
Address += mDxeRuntimePciExpressLibPciExpressBaseAddress;
//
// If SetVirtualAddressMap() has not been called, then just return the physical address
//
if (!EfiGoneVirtual ()) {
return Address;
}
//
// See if there is a physical address match at the exact same index as the last address match
//
if (mDxeRuntimePciExpressLibRegistrationTable[mDxeRuntimePciExpressLibLastRuntimeRange].PhysicalAddress == (Address & 0x0ffff000)) {
//
// Convert the physical address to a virtual address and return the virtual address
//
return (Address & 0x00000fff) + mDxeRuntimePciExpressLibRegistrationTable[mDxeRuntimePciExpressLibLastRuntimeRange].VirtualAddress;
}
//
// Search the entire table for a phyical address match
//
for (Index = 0; Index < mDxeRuntimePciExpressLibNumberOfRuntimeRanges; Index++) {
if (mDxeRuntimePciExpressLibRegistrationTable[Index].PhysicalAddress == (Address & 0x0ffff000)) {
//
// Cache the matching index value
//
mDxeRuntimePciExpressLibLastRuntimeRange = Index;
//
// Convert the physical address to a virtual address and return the virtual address
//
return (Address & 0x00000fff) + mDxeRuntimePciExpressLibRegistrationTable[Index].VirtualAddress;
}
}
//
// No match was found. This is a critical error at OS runtime, so ASSERT() and force a breakpoint.
//
ASSERT (FALSE);
CpuBreakpoint();
//
// Return the physical address
//
return Address;
}
/**
Registers a PCI device so PCI configuration registers may be accessed after
SetVirtualAddressMap().
Registers the PCI device specified by Address so all the PCI configuration
registers associated with that PCI device may be accessed after SetVirtualAddressMap()
is called.
If Address > 0x0FFFFFFF, then ASSERT().
@param Address Address that encodes the PCI Bus, Device, Function and
Register.
@retval RETURN_SUCCESS The PCI device was registered for runtime access.
@retval RETURN_UNSUPPORTED An attempt was made to call this function
after ExitBootServices().
@retval RETURN_UNSUPPORTED The resources required to access the PCI device
at runtime could not be mapped.
@retval RETURN_OUT_OF_RESOURCES There are not enough resources available to
complete the registration.
**/
RETURN_STATUS
EFIAPI
PciExpressRegisterForRuntimeAccess (
IN UINTN Address
)
{
EFI_STATUS Status;
EFI_GCD_MEMORY_SPACE_DESCRIPTOR Descriptor;
UINTN Index;
VOID *NewTable;
//
// Return an error if this function is called after ExitBootServices().
//
if (EfiAtRuntime ()) {
return RETURN_UNSUPPORTED;
}
//
// Make sure Address is valid
//
ASSERT (((Address) & ~0xfffffff) == 0);
//
// Convert Address to a physical address in the MMIO PCI Express range
// at the beginning of the PCI Configuration header for the specified
// PCI Bus/Dev/Func
//
Address = GetPciExpressAddress (Address & 0x0ffff000);
//
// See if Address has already been registerd for runtime access
//
for (Index = 0; Index < mDxeRuntimePciExpressLibNumberOfRuntimeRanges; Index++) {
if (mDxeRuntimePciExpressLibRegistrationTable[Index].PhysicalAddress == Address) {
return RETURN_SUCCESS;
}
}
//
// Get the GCD Memory Descriptor for the PCI Express Bus/Dev/Func specified by Address
//
Status = gDS->GetMemorySpaceDescriptor (Address, &Descriptor);
if (EFI_ERROR (Status)) {
return RETURN_UNSUPPORTED;
}
//
// Mark the 4KB region for the PCI Express Bus/Dev/Func as EFI_RUNTIME_MEMORY so the OS
// will allocate a virtual address range for the 4KB PCI Configuration Header.
//
Status = gDS->SetMemorySpaceAttributes (Address, 0x1000, Descriptor.Attributes | EFI_MEMORY_RUNTIME);
if (EFI_ERROR (Status)) {
return RETURN_UNSUPPORTED;
}
//
// Grow the size of the registration table
//
NewTable = ReallocateRuntimePool (
(mDxeRuntimePciExpressLibNumberOfRuntimeRanges + 0) * sizeof (PCI_EXPRESS_RUNTIME_REGISTRATION_TABLE),
(mDxeRuntimePciExpressLibNumberOfRuntimeRanges + 1) * sizeof (PCI_EXPRESS_RUNTIME_REGISTRATION_TABLE),
mDxeRuntimePciExpressLibRegistrationTable
);
if (NewTable == NULL) {
return RETURN_OUT_OF_RESOURCES;
}
mDxeRuntimePciExpressLibRegistrationTable = NewTable;
mDxeRuntimePciExpressLibRegistrationTable[mDxeRuntimePciExpressLibNumberOfRuntimeRanges].PhysicalAddress = Address;
mDxeRuntimePciExpressLibRegistrationTable[mDxeRuntimePciExpressLibNumberOfRuntimeRanges].VirtualAddress = Address;
mDxeRuntimePciExpressLibNumberOfRuntimeRanges++;
return RETURN_SUCCESS;
}
/**
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().
@param Address Address that encodes the PCI Bus, Device, Function and
Register.
@return The read value from the PCI configuration register.
**/
UINT8
EFIAPI
PciExpressRead8 (
IN UINTN Address
)
{
return MmioRead8 (GetPciExpressAddress (Address));
}
/**
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().
@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
PciExpressWrite8 (
IN UINTN Address,
IN UINT8 Value
)
{
return MmioWrite8 (GetPciExpressAddress (Address), Value);
}
/**
Performs a bitwise 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 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().
@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
PciExpressOr8 (
IN UINTN Address,
IN UINT8 OrData
)
{
return MmioOr8 (GetPciExpressAddress (Address), 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().
@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
PciExpressAnd8 (
IN UINTN Address,
IN UINT8 AndData
)
{
return MmioAnd8 (GetPciExpressAddress (Address), AndData);
}
/**
Performs a bitwise AND of an 8-bit PCI configuration register with an 8-bit
value, followed a bitwise 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 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().
@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
PciExpressAndThenOr8 (
IN UINTN Address,
IN UINT8 AndData,
IN UINT8 OrData
)
{
return MmioAndThenOr8 (
GetPciExpressAddress (Address),
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 StartBit is greater than 7, then ASSERT().
If EndBit is greater than 7, then ASSERT().
If EndBit is less than 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
PciExpressBitFieldRead8 (
IN UINTN Address,
IN UINTN StartBit,
IN UINTN EndBit
)
{
return MmioBitFieldRead8 (
GetPciExpressAddress (Address),
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 StartBit is greater than 7, then ASSERT().
If EndBit is greater than 7, then ASSERT().
If EndBit is less than 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
PciExpressBitFieldWrite8 (
IN UINTN Address,
IN UINTN StartBit,
IN UINTN EndBit,
IN UINT8 Value
)
{
return MmioBitFieldWrite8 (
GetPciExpressAddress (Address),
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 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 StartBit is greater than 7, then ASSERT().
If EndBit is greater than 7, then ASSERT().
If EndBit is less than 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
PciExpressBitFieldOr8 (
IN UINTN Address,
IN UINTN StartBit,
IN UINTN EndBit,
IN UINT8 OrData
)
{
return MmioBitFieldOr8 (
GetPciExpressAddress (Address),
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 StartBit is greater than 7, then ASSERT().
If EndBit is greater than 7, then ASSERT().
If EndBit is less than 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
PciExpressBitFieldAnd8 (
IN UINTN Address,
IN UINTN StartBit,
IN UINTN EndBit,
IN UINT8 AndData
)
{
return MmioBitFieldAnd8 (
GetPciExpressAddress (Address),
StartBit,
EndBit,
AndData
);
}
/**
Reads a bit field in an 8-bit port, performs a bitwise AND followed by 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 AND followed by a bitwise 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 StartBit is greater than 7, then ASSERT().
If EndBit is greater than 7, then ASSERT().
If EndBit is less than 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
PciExpressBitFieldAndThenOr8 (
IN UINTN Address,
IN UINTN StartBit,
IN UINTN EndBit,
IN UINT8 AndData,
IN UINT8 OrData
)
{
return MmioBitFieldAndThenOr8 (
GetPciExpressAddress (Address),
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().
@param Address Address that encodes the PCI Bus, Device, Function and
Register.
@return The read value from the PCI configuration register.
**/
UINT16
EFIAPI
PciExpressRead16 (
IN UINTN Address
)
{
return MmioRead16 (GetPciExpressAddress (Address));
}
/**
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().
@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
PciExpressWrite16 (
IN UINTN Address,
IN UINT16 Value
)
{
return MmioWrite16 (GetPciExpressAddress (Address), Value);
}
/**
Performs a bitwise 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 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().
@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
PciExpressOr16 (
IN UINTN Address,
IN UINT16 OrData
)
{
return MmioOr16 (GetPciExpressAddress (Address), 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().
@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
PciExpressAnd16 (
IN UINTN Address,
IN UINT16 AndData
)
{
return MmioAnd16 (GetPciExpressAddress (Address), AndData);
}
/**
Performs a bitwise AND of a 16-bit PCI configuration register with a 16-bit
value, followed a bitwise 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 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().
@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
PciExpressAndThenOr16 (
IN UINTN Address,
IN UINT16 AndData,
IN UINT16 OrData
)
{
return MmioAndThenOr16 (
GetPciExpressAddress (Address),
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 StartBit is greater than 15, then ASSERT().
If EndBit is greater than 15, then ASSERT().
If EndBit is less than 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
PciExpressBitFieldRead16 (
IN UINTN Address,
IN UINTN StartBit,
IN UINTN EndBit
)
{
return MmioBitFieldRead16 (
GetPciExpressAddress (Address),
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 StartBit is greater than 15, then ASSERT().
If EndBit is greater than 15, then ASSERT().
If EndBit is less than 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
PciExpressBitFieldWrite16 (
IN UINTN Address,
IN UINTN StartBit,
IN UINTN EndBit,
IN UINT16 Value
)
{
return MmioBitFieldWrite16 (
GetPciExpressAddress (Address),
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 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 StartBit is greater than 15, then ASSERT().
If EndBit is greater than 15, then ASSERT().
If EndBit is less than 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
PciExpressBitFieldOr16 (
IN UINTN Address,
IN UINTN StartBit,
IN UINTN EndBit,
IN UINT16 OrData
)
{
return MmioBitFieldOr16 (
GetPciExpressAddress (Address),
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 StartBit is greater than 15, then ASSERT().
If EndBit is greater than 15, then ASSERT().
If EndBit is less than 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
PciExpressBitFieldAnd16 (
IN UINTN Address,
IN UINTN StartBit,
IN UINTN EndBit,
IN UINT16 AndData
)
{
return MmioBitFieldAnd16 (
GetPciExpressAddress (Address),
StartBit,
EndBit,
AndData
);
}
/**
Reads a bit field in a 16-bit port, performs a bitwise AND followed by 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 AND followed by a bitwise 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 StartBit is greater than 15, then ASSERT().
If EndBit is greater than 15, then ASSERT().
If EndBit is less than 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
PciExpressBitFieldAndThenOr16 (
IN UINTN Address,
IN UINTN StartBit,
IN UINTN EndBit,
IN UINT16 AndData,
IN UINT16 OrData
)
{
return MmioBitFieldAndThenOr16 (
GetPciExpressAddress (Address),
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().
@param Address Address that encodes the PCI Bus, Device, Function and
Register.
@return The read value from the PCI configuration register.
**/
UINT32
EFIAPI
PciExpressRead32 (
IN UINTN Address
)
{
return MmioRead32 (GetPciExpressAddress (Address));
}
/**
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().
@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
PciExpressWrite32 (
IN UINTN Address,
IN UINT32 Value
)
{
return MmioWrite32 (GetPciExpressAddress (Address), Value);
}
/**
Performs a bitwise 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 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().
@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
PciExpressOr32 (
IN UINTN Address,
IN UINT32 OrData
)
{
return MmioOr32 (GetPciExpressAddress (Address), 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().
@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
PciExpressAnd32 (
IN UINTN Address,
IN UINT32 AndData
)
{
return MmioAnd32 (GetPciExpressAddress (Address), AndData);
}
/**
Performs a bitwise AND of a 32-bit PCI configuration register with a 32-bit
value, followed a bitwise 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 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().
@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
PciExpressAndThenOr32 (
IN UINTN Address,
IN UINT32 AndData,
IN UINT32 OrData
)
{
return MmioAndThenOr32 (
GetPciExpressAddress (Address),
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 StartBit is greater than 31, then ASSERT().
If EndBit is greater than 31, then ASSERT().
If EndBit is less than 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
PciExpressBitFieldRead32 (
IN UINTN Address,
IN UINTN StartBit,
IN UINTN EndBit
)
{
return MmioBitFieldRead32 (
GetPciExpressAddress (Address),
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 StartBit is greater than 31, then ASSERT().
If EndBit is greater than 31, then ASSERT().
If EndBit is less than 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
PciExpressBitFieldWrite32 (
IN UINTN Address,
IN UINTN StartBit,
IN UINTN EndBit,
IN UINT32 Value
)
{
return MmioBitFieldWrite32 (
GetPciExpressAddress (Address),
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 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 StartBit is greater than 31, then ASSERT().
If EndBit is greater than 31, then ASSERT().
If EndBit is less than 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
PciExpressBitFieldOr32 (
IN UINTN Address,
IN UINTN StartBit,
IN UINTN EndBit,
IN UINT32 OrData
)
{
return MmioBitFieldOr32 (
GetPciExpressAddress (Address),
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 StartBit is greater than 31, then ASSERT().
If EndBit is greater than 31, then ASSERT().
If EndBit is less than 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
PciExpressBitFieldAnd32 (
IN UINTN Address,
IN UINTN StartBit,
IN UINTN EndBit,
IN UINT32 AndData
)
{
return MmioBitFieldAnd32 (
GetPciExpressAddress (Address),
StartBit,
EndBit,
AndData
);
}
/**
Reads a bit field in a 32-bit port, performs a bitwise AND followed by 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 AND followed by a bitwise 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 StartBit is greater than 31, then ASSERT().
If EndBit is greater than 31, then ASSERT().
If EndBit is less than 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
PciExpressBitFieldAndThenOr32 (
IN UINTN Address,
IN UINTN StartBit,
IN UINTN EndBit,
IN UINT32 AndData,
IN UINT32 OrData
)
{
return MmioBitFieldAndThenOr32 (
GetPciExpressAddress (Address),
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 ((StartAddress & 0xFFF) + Size) > 0x1000, then ASSERT().
If Size > 0 and 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 read data from StartAddress.
**/
UINTN
EFIAPI
PciExpressReadBuffer (
IN UINTN StartAddress,
IN UINTN Size,
OUT VOID *Buffer
)
{
UINTN ReturnValue;
ASSERT (((StartAddress & 0xFFF) + Size) <= 0x1000);
if (Size == 0) {
return Size;
}
ASSERT (Buffer != NULL);
//
// Save Size for return
//
ReturnValue = Size;
if ((StartAddress & 1) != 0) {
//
// Read a byte if StartAddress is byte aligned
//
*(volatile UINT8 *)Buffer = PciExpressRead8 (StartAddress);
StartAddress += sizeof (UINT8);
Size -= sizeof (UINT8);
Buffer = (UINT8*)Buffer + 1;
}
if (Size >= sizeof (UINT16) && (StartAddress & 2) != 0) {
//
// Read a word if StartAddress is word aligned
//
WriteUnaligned16 ((UINT16 *) Buffer, (UINT16) PciExpressRead16 (StartAddress));
StartAddress += sizeof (UINT16);
Size -= sizeof (UINT16);
Buffer = (UINT16*)Buffer + 1;
}
while (Size >= sizeof (UINT32)) {
//
// Read as many double words as possible
//
WriteUnaligned32 ((UINT32 *) Buffer, (UINT32) PciExpressRead32 (StartAddress));
StartAddress += sizeof (UINT32);
Size -= sizeof (UINT32);
Buffer = (UINT32*)Buffer + 1;
}
if (Size >= sizeof (UINT16)) {
//
// Read the last remaining word if exist
//
WriteUnaligned16 ((UINT16 *) Buffer, (UINT16) PciExpressRead16 (StartAddress));
StartAddress += sizeof (UINT16);
Size -= sizeof (UINT16);
Buffer = (UINT16*)Buffer + 1;
}
if (Size >= sizeof (UINT8)) {
//
// Read the last remaining byte if exist
//
*(volatile UINT8 *)Buffer = PciExpressRead8 (StartAddress);
}
return ReturnValue;
}
/**
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 ((StartAddress & 0xFFF) + Size) > 0x1000, then ASSERT().
If Size > 0 and 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 written to StartAddress.
**/
UINTN
EFIAPI
PciExpressWriteBuffer (
IN UINTN StartAddress,
IN UINTN Size,
IN VOID *Buffer
)
{
UINTN ReturnValue;
ASSERT (((StartAddress & 0xFFF) + Size) <= 0x1000);
if (Size == 0) {
return 0;
}
ASSERT (Buffer != NULL);
//
// Save Size for return
//
ReturnValue = Size;
if ((StartAddress & 1) != 0) {
//
// Write a byte if StartAddress is byte aligned
//
PciExpressWrite8 (StartAddress, *(UINT8*)Buffer);
StartAddress += sizeof (UINT8);
Size -= sizeof (UINT8);
Buffer = (UINT8*)Buffer + 1;
}
if (Size >= sizeof (UINT16) && (StartAddress & 2) != 0) {
//
// Write a word if StartAddress is word aligned
//
PciExpressWrite16 (StartAddress, ReadUnaligned16 ((UINT16*)Buffer));
StartAddress += sizeof (UINT16);
Size -= sizeof (UINT16);
Buffer = (UINT16*)Buffer + 1;
}
while (Size >= sizeof (UINT32)) {
//
// Write as many double words as possible
//
PciExpressWrite32 (StartAddress, ReadUnaligned32 ((UINT32*)Buffer));
StartAddress += sizeof (UINT32);
Size -= sizeof (UINT32);
Buffer = (UINT32*)Buffer + 1;
}
if (Size >= sizeof (UINT16)) {
//
// Write the last remaining word if exist
//
PciExpressWrite16 (StartAddress, ReadUnaligned16 ((UINT16*)Buffer));
StartAddress += sizeof (UINT16);
Size -= sizeof (UINT16);
Buffer = (UINT16*)Buffer + 1;
}
if (Size >= sizeof (UINT8)) {
//
// Write the last remaining byte if exist
//
PciExpressWrite8 (StartAddress, *(UINT8*)Buffer);
}
return ReturnValue;
}
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