mirror of https://github.com/acidanthera/audk.git
643 lines
17 KiB
C
643 lines
17 KiB
C
/** @file
|
|
I/O Library.
|
|
The implementation of I/O operation for this library instance
|
|
are based on EFI_CPU_IO_PROTOCOL.
|
|
|
|
Copyright (c) 2009, 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: IoLib.c
|
|
|
|
**/
|
|
|
|
|
|
#include "SmmCpuIoLibInternal.h"
|
|
|
|
//
|
|
// Globle varible to cache pointer to CpuIo protocol.
|
|
//
|
|
EFI_SMM_CPU_IO_PROTOCOL *mCpuIo = NULL;
|
|
EFI_SMM_PCI_ROOT_BRIDGE_IO_PROTOCOL *mPciRootBridgeIo = NULL;
|
|
|
|
/**
|
|
The constructor function caches the pointer to CpuIo protocol.
|
|
|
|
The constructor function locates CpuIo protocol from protocol database.
|
|
It will ASSERT() if that operation fails and it will always return EFI_SUCCESS.
|
|
|
|
@param ImageHandle The firmware allocated handle for the EFI image.
|
|
@param SystemTable A pointer to the EFI System Table.
|
|
|
|
@retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
IoLibConstructor (
|
|
IN EFI_HANDLE ImageHandle,
|
|
IN EFI_SYSTEM_TABLE *SystemTable
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
|
|
Status = gSmst->SmmLocateProtocol (&gEfiSmmPciRootBridgeIoProtocolGuid, NULL, (VOID **) &mPciRootBridgeIo);
|
|
if (EFI_ERROR (Status)) {
|
|
Status = gSmst->SmmLocateProtocol (&gEfiSmmCpuIoProtocolGuid, NULL, (VOID **) &mCpuIo);
|
|
}
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
return Status;
|
|
}
|
|
|
|
/**
|
|
Reads registers in the EFI CPU I/O space.
|
|
|
|
Reads the I/O port specified by Port with registers width specified by Width.
|
|
The read value is returned. If such operations are not supported, then ASSERT().
|
|
This function must guarantee that all I/O read and write operations are serialized.
|
|
|
|
@param Port The base address of the I/O operation.
|
|
The caller is responsible for aligning the Address if required.
|
|
@param Width The width of the I/O operation.
|
|
|
|
@return Data read from registers in the EFI CPU I/O space.
|
|
|
|
**/
|
|
UINT64
|
|
EFIAPI
|
|
IoReadWorker (
|
|
IN UINTN Port,
|
|
IN EFI_SMM_IO_WIDTH Width
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
UINT64 Data;
|
|
|
|
if (mPciRootBridgeIo != NULL) {
|
|
Status = mPciRootBridgeIo->Io.Read (mPciRootBridgeIo, (EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH) Width, Port, 1, &Data);
|
|
} else {
|
|
Status = mCpuIo->Io.Read (mCpuIo, Width, Port, 1, &Data);
|
|
}
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
return Data;
|
|
}
|
|
|
|
/**
|
|
Writes registers in the EFI CPU I/O space.
|
|
|
|
Writes the I/O port specified by Port with registers width and value specified by Width
|
|
and Data respectively. Data is returned. If such operations are not supported, then ASSERT().
|
|
This function must guarantee that all I/O read and write operations are serialized.
|
|
|
|
@param Port The base address of the I/O operation.
|
|
The caller is responsible for aligning the Address if required.
|
|
@param Width The width of the I/O operation.
|
|
@param Data The value to write to the I/O port.
|
|
|
|
@return The paramter of Data.
|
|
|
|
**/
|
|
UINT64
|
|
EFIAPI
|
|
IoWriteWorker (
|
|
IN UINTN Port,
|
|
IN EFI_SMM_IO_WIDTH Width,
|
|
IN UINT64 Data
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
|
|
if (mPciRootBridgeIo != NULL) {
|
|
Status = mPciRootBridgeIo->Io.Write (mPciRootBridgeIo, (EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH) Width, Port, 1, &Data);
|
|
} else {
|
|
Status = mCpuIo->Io.Write (mCpuIo, Width, Port, 1, &Data);
|
|
}
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
return Data;
|
|
}
|
|
|
|
/**
|
|
Reads memory-mapped registers in the EFI system memory space.
|
|
|
|
Reads the MMIO registers specified by Address with registers width specified by Width.
|
|
The read value is returned. If such operations are not supported, then ASSERT().
|
|
This function must guarantee that all MMIO read and write operations are serialized.
|
|
|
|
@param Address The MMIO register to read.
|
|
The caller is responsible for aligning the Address if required.
|
|
@param Width The width of the I/O operation.
|
|
|
|
@return Data read from registers in the EFI system memory space.
|
|
|
|
**/
|
|
UINT64
|
|
EFIAPI
|
|
MmioReadWorker (
|
|
IN UINTN Address,
|
|
IN EFI_SMM_IO_WIDTH Width
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
UINT64 Data;
|
|
|
|
if (mPciRootBridgeIo != NULL) {
|
|
Status = mPciRootBridgeIo->Mem.Read (mPciRootBridgeIo, (EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH) Width, Address, 1, &Data);
|
|
} else {
|
|
Status = mCpuIo->Mem.Read (mCpuIo, Width, Address, 1, &Data);
|
|
}
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
return Data;
|
|
}
|
|
|
|
/**
|
|
Writes memory-mapped registers in the EFI system memory space.
|
|
|
|
Writes the MMIO registers specified by Address with registers width and value specified by Width
|
|
and Data respectively. Data is returned. If such operations are not supported, then ASSERT().
|
|
This function must guarantee that all MMIO read and write operations are serialized.
|
|
|
|
@param Address The MMIO register to read.
|
|
The caller is responsible for aligning the Address if required.
|
|
@param Width The width of the I/O operation.
|
|
@param Data The value to write to the I/O port.
|
|
|
|
@return Data read from registers in the EFI system memory space.
|
|
|
|
**/
|
|
UINT64
|
|
EFIAPI
|
|
MmioWriteWorker (
|
|
IN UINTN Address,
|
|
IN EFI_SMM_IO_WIDTH Width,
|
|
IN UINT64 Data
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
|
|
if (mPciRootBridgeIo != NULL) {
|
|
Status = mPciRootBridgeIo->Mem.Write (mPciRootBridgeIo, (EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH) Width, Address, 1, &Data);
|
|
} else {
|
|
Status = mCpuIo->Mem.Write (mCpuIo, Width, Address, 1, &Data);
|
|
}
|
|
ASSERT_EFI_ERROR (Status);
|
|
|
|
return Data;
|
|
}
|
|
|
|
/**
|
|
Reads an 8-bit I/O port.
|
|
|
|
Reads the 8-bit I/O port specified by Port. The 8-bit read value is returned.
|
|
This function must guarantee that all I/O read and write operations are
|
|
serialized.
|
|
|
|
If 8-bit I/O port operations are not supported, then ASSERT().
|
|
|
|
@param Port The I/O port to read.
|
|
|
|
@return The value read.
|
|
|
|
**/
|
|
UINT8
|
|
EFIAPI
|
|
IoRead8 (
|
|
IN UINTN Port
|
|
)
|
|
{
|
|
return (UINT8)IoReadWorker (Port, SMM_IO_UINT8);
|
|
}
|
|
|
|
/**
|
|
Writes an 8-bit I/O port.
|
|
|
|
Writes the 8-bit I/O port specified by Port with the value specified by Value
|
|
and returns Value. This function must guarantee that all I/O read and write
|
|
operations are serialized.
|
|
|
|
If 8-bit I/O port operations are not supported, then ASSERT().
|
|
|
|
@param Port The I/O port to write.
|
|
@param Value The value to write to the I/O port.
|
|
|
|
@return The value written the I/O port.
|
|
|
|
**/
|
|
UINT8
|
|
EFIAPI
|
|
IoWrite8 (
|
|
IN UINTN Port,
|
|
IN UINT8 Value
|
|
)
|
|
{
|
|
return (UINT8)IoWriteWorker (Port, SMM_IO_UINT8, Value);
|
|
}
|
|
|
|
/**
|
|
Reads a 16-bit I/O port.
|
|
|
|
Reads the 16-bit I/O port specified by Port. The 16-bit read value is returned.
|
|
This function must guarantee that all I/O read and write operations are
|
|
serialized.
|
|
|
|
If Port is not aligned on a 16-bit boundary, then ASSERT().
|
|
|
|
If 16-bit I/O port operations are not supported, then ASSERT().
|
|
|
|
@param Port The I/O port to read.
|
|
|
|
@return The value read.
|
|
|
|
**/
|
|
UINT16
|
|
EFIAPI
|
|
IoRead16 (
|
|
IN UINTN Port
|
|
)
|
|
{
|
|
//
|
|
// Make sure Port is aligned on a 16-bit boundary.
|
|
//
|
|
ASSERT ((Port & 1) == 0);
|
|
return (UINT16)IoReadWorker (Port, SMM_IO_UINT16);
|
|
}
|
|
|
|
/**
|
|
Writes a 16-bit I/O port.
|
|
|
|
Writes the 16-bit I/O port specified by Port with the value specified by Value
|
|
and returns Value. This function must guarantee that all I/O read and write
|
|
operations are serialized.
|
|
|
|
If Port is not aligned on a 16-bit boundary, then ASSERT().
|
|
|
|
If 16-bit I/O port operations are not supported, then ASSERT().
|
|
|
|
@param Port The I/O port to write.
|
|
@param Value The value to write to the I/O port.
|
|
|
|
@return The value written the I/O port.
|
|
|
|
**/
|
|
UINT16
|
|
EFIAPI
|
|
IoWrite16 (
|
|
IN UINTN Port,
|
|
IN UINT16 Value
|
|
)
|
|
{
|
|
//
|
|
// Make sure Port is aligned on a 16-bit boundary.
|
|
//
|
|
ASSERT ((Port & 1) == 0);
|
|
return (UINT16)IoWriteWorker (Port, SMM_IO_UINT16, Value);
|
|
}
|
|
|
|
/**
|
|
Reads a 32-bit I/O port.
|
|
|
|
Reads the 32-bit I/O port specified by Port. The 32-bit read value is returned.
|
|
This function must guarantee that all I/O read and write operations are
|
|
serialized.
|
|
|
|
If Port is not aligned on a 32-bit boundary, then ASSERT().
|
|
|
|
If 32-bit I/O port operations are not supported, then ASSERT().
|
|
|
|
@param Port The I/O port to read.
|
|
|
|
@return The value read.
|
|
|
|
**/
|
|
UINT32
|
|
EFIAPI
|
|
IoRead32 (
|
|
IN UINTN Port
|
|
)
|
|
{
|
|
//
|
|
// Make sure Port is aligned on a 32-bit boundary.
|
|
//
|
|
ASSERT ((Port & 3) == 0);
|
|
return (UINT32)IoReadWorker (Port, SMM_IO_UINT32);
|
|
}
|
|
|
|
/**
|
|
Writes a 32-bit I/O port.
|
|
|
|
Writes the 32-bit I/O port specified by Port with the value specified by Value
|
|
and returns Value. This function must guarantee that all I/O read and write
|
|
operations are serialized.
|
|
|
|
If Port is not aligned on a 32-bit boundary, then ASSERT().
|
|
|
|
If 32-bit I/O port operations are not supported, then ASSERT().
|
|
|
|
@param Port The I/O port to write.
|
|
@param Value The value to write to the I/O port.
|
|
|
|
@return The value written the I/O port.
|
|
|
|
**/
|
|
UINT32
|
|
EFIAPI
|
|
IoWrite32 (
|
|
IN UINTN Port,
|
|
IN UINT32 Value
|
|
)
|
|
{
|
|
//
|
|
// Make sure Port is aligned on a 32-bit boundary.
|
|
//
|
|
ASSERT ((Port & 3) == 0);
|
|
return (UINT32)IoWriteWorker (Port, SMM_IO_UINT32, Value);
|
|
}
|
|
|
|
/**
|
|
Reads a 64-bit I/O port.
|
|
|
|
Reads the 64-bit I/O port specified by Port. The 64-bit read value is returned.
|
|
This function must guarantee that all I/O read and write operations are
|
|
serialized.
|
|
|
|
If Port is not aligned on a 64-bit boundary, then ASSERT().
|
|
|
|
If 64-bit I/O port operations are not supported, then ASSERT().
|
|
|
|
@param Port The I/O port to read.
|
|
|
|
@return The value read.
|
|
|
|
**/
|
|
UINT64
|
|
EFIAPI
|
|
IoRead64 (
|
|
IN UINTN Port
|
|
)
|
|
{
|
|
//
|
|
// Make sure Port is aligned on a 64-bit boundary.
|
|
//
|
|
ASSERT ((Port & 7) == 0);
|
|
return IoReadWorker (Port, SMM_IO_UINT64);
|
|
}
|
|
|
|
/**
|
|
Writes a 64-bit I/O port.
|
|
|
|
Writes the 64-bit I/O port specified by Port with the value specified by Value
|
|
and returns Value. This function must guarantee that all I/O read and write
|
|
operations are serialized.
|
|
|
|
If Port is not aligned on a 64-bit boundary, then ASSERT().
|
|
|
|
If 64-bit I/O port operations are not supported, then ASSERT().
|
|
|
|
@param Port The I/O port to write.
|
|
@param Value The value to write to the I/O port.
|
|
|
|
@return The value written the I/O port.
|
|
|
|
**/
|
|
UINT64
|
|
EFIAPI
|
|
IoWrite64 (
|
|
IN UINTN Port,
|
|
IN UINT64 Value
|
|
)
|
|
{
|
|
//
|
|
// Make sure Port is aligned on a 64-bit boundary.
|
|
//
|
|
ASSERT ((Port & 7) == 0);
|
|
return IoWriteWorker (Port, SMM_IO_UINT64, Value);
|
|
}
|
|
|
|
/**
|
|
Reads an 8-bit MMIO register.
|
|
|
|
Reads the 8-bit MMIO register specified by Address. The 8-bit read value is
|
|
returned. This function must guarantee that all MMIO read and write
|
|
operations are serialized.
|
|
|
|
If 8-bit MMIO register operations are not supported, then ASSERT().
|
|
|
|
@param Address The MMIO register to read.
|
|
|
|
@return The value read.
|
|
|
|
**/
|
|
UINT8
|
|
EFIAPI
|
|
MmioRead8 (
|
|
IN UINTN Address
|
|
)
|
|
{
|
|
return (UINT8)MmioReadWorker (Address, SMM_IO_UINT8);
|
|
}
|
|
|
|
/**
|
|
Writes an 8-bit MMIO register.
|
|
|
|
Writes the 8-bit MMIO register specified by Address with the value specified
|
|
by Value and returns Value. This function must guarantee that all MMIO read
|
|
and write operations are serialized.
|
|
|
|
If 8-bit MMIO register operations are not supported, then ASSERT().
|
|
|
|
@param Address The MMIO register to write.
|
|
@param Value The value to write to the MMIO register.
|
|
|
|
**/
|
|
UINT8
|
|
EFIAPI
|
|
MmioWrite8 (
|
|
IN UINTN Address,
|
|
IN UINT8 Value
|
|
)
|
|
{
|
|
return (UINT8)MmioWriteWorker (Address, SMM_IO_UINT8, Value);
|
|
}
|
|
|
|
/**
|
|
Reads a 16-bit MMIO register.
|
|
|
|
Reads the 16-bit MMIO register specified by Address. The 16-bit read value is
|
|
returned. This function must guarantee that all MMIO read and write
|
|
operations are serialized.
|
|
|
|
If Address is not aligned on a 16-bit boundary, then ASSERT().
|
|
|
|
If 16-bit MMIO register operations are not supported, then ASSERT().
|
|
|
|
@param Address The MMIO register to read.
|
|
|
|
@return The value read.
|
|
|
|
**/
|
|
UINT16
|
|
EFIAPI
|
|
MmioRead16 (
|
|
IN UINTN Address
|
|
)
|
|
{
|
|
//
|
|
// Make sure Address is aligned on a 16-bit boundary.
|
|
//
|
|
ASSERT ((Address & 1) == 0);
|
|
return (UINT16)MmioReadWorker (Address, SMM_IO_UINT16);
|
|
}
|
|
|
|
/**
|
|
Writes a 16-bit MMIO register.
|
|
|
|
Writes the 16-bit MMIO register specified by Address with the value specified
|
|
by Value and returns Value. This function must guarantee that all MMIO read
|
|
and write operations are serialized.
|
|
|
|
If Address is not aligned on a 16-bit boundary, then ASSERT().
|
|
|
|
If 16-bit MMIO register operations are not supported, then ASSERT().
|
|
|
|
@param Address The MMIO register to write.
|
|
@param Value The value to write to the MMIO register.
|
|
|
|
**/
|
|
UINT16
|
|
EFIAPI
|
|
MmioWrite16 (
|
|
IN UINTN Address,
|
|
IN UINT16 Value
|
|
)
|
|
{
|
|
//
|
|
// Make sure Address is aligned on a 16-bit boundary.
|
|
//
|
|
ASSERT ((Address & 1) == 0);
|
|
return (UINT16)MmioWriteWorker (Address, SMM_IO_UINT16, Value);
|
|
}
|
|
|
|
/**
|
|
Reads a 32-bit MMIO register.
|
|
|
|
Reads the 32-bit MMIO register specified by Address. The 32-bit read value is
|
|
returned. This function must guarantee that all MMIO read and write
|
|
operations are serialized.
|
|
|
|
If Address is not aligned on a 32-bit boundary, then ASSERT().
|
|
|
|
If 32-bit MMIO register operations are not supported, then ASSERT().
|
|
|
|
@param Address The MMIO register to read.
|
|
|
|
@return The value read.
|
|
|
|
**/
|
|
UINT32
|
|
EFIAPI
|
|
MmioRead32 (
|
|
IN UINTN Address
|
|
)
|
|
{
|
|
//
|
|
// Make sure Address is aligned on a 32-bit boundary.
|
|
//
|
|
ASSERT ((Address & 3) == 0);
|
|
return (UINT32)MmioReadWorker (Address, SMM_IO_UINT32);
|
|
}
|
|
|
|
/**
|
|
Writes a 32-bit MMIO register.
|
|
|
|
Writes the 32-bit MMIO register specified by Address with the value specified
|
|
by Value and returns Value. This function must guarantee that all MMIO read
|
|
and write operations are serialized.
|
|
|
|
If Address is not aligned on a 32-bit boundary, then ASSERT().
|
|
|
|
If 32-bit MMIO register operations are not supported, then ASSERT().
|
|
|
|
@param Address The MMIO register to write.
|
|
@param Value The value to write to the MMIO register.
|
|
|
|
**/
|
|
UINT32
|
|
EFIAPI
|
|
MmioWrite32 (
|
|
IN UINTN Address,
|
|
IN UINT32 Value
|
|
)
|
|
{
|
|
//
|
|
// Make sure Address is aligned on a 32-bit boundary.
|
|
//
|
|
ASSERT ((Address & 3) == 0);
|
|
return (UINT32)MmioWriteWorker (Address, SMM_IO_UINT32, Value);
|
|
}
|
|
|
|
/**
|
|
Reads a 64-bit MMIO register.
|
|
|
|
Reads the 64-bit MMIO register specified by Address. The 64-bit read value is
|
|
returned. This function must guarantee that all MMIO read and write
|
|
operations are serialized.
|
|
|
|
If Address is not aligned on a 64-bit boundary, then ASSERT().
|
|
|
|
If 64-bit MMIO register operations are not supported, then ASSERT().
|
|
|
|
@param Address The MMIO register to read.
|
|
|
|
@return The value read.
|
|
|
|
**/
|
|
UINT64
|
|
EFIAPI
|
|
MmioRead64 (
|
|
IN UINTN Address
|
|
)
|
|
{
|
|
//
|
|
// Make sure Address is aligned on a 64-bit boundary.
|
|
//
|
|
ASSERT ((Address & 7) == 0);
|
|
return (UINT64)MmioReadWorker (Address, SMM_IO_UINT64);
|
|
}
|
|
|
|
/**
|
|
Writes a 64-bit MMIO register.
|
|
|
|
Writes the 64-bit MMIO register specified by Address with the value specified
|
|
by Value and returns Value. This function must guarantee that all MMIO read
|
|
and write operations are serialized.
|
|
|
|
If Address is not aligned on a 64-bit boundary, then ASSERT().
|
|
|
|
If 64-bit MMIO register operations are not supported, then ASSERT().
|
|
|
|
@param Address The MMIO register to write.
|
|
@param Value The value to write to the MMIO register.
|
|
|
|
**/
|
|
UINT64
|
|
EFIAPI
|
|
MmioWrite64 (
|
|
IN UINTN Address,
|
|
IN UINT64 Value
|
|
)
|
|
{
|
|
//
|
|
// Make sure Address is aligned on a 64-bit boundary.
|
|
//
|
|
ASSERT ((Address & 7) == 0);
|
|
return (UINT64)MmioWriteWorker (Address, SMM_IO_UINT64, Value);
|
|
}
|