112af4265f
The worker functions in this library have also been updated to simply use the instance of the SMM CPU I/O 2 Protocol that is present in the SMM Services Table. The dependency on the UEFI Boot Services Table Library has also been removed so the gBS, gST, and gImageHandle symbols will not be automatically linked into an SMM Driver that uses this library. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9999 6f19259b-4bc3-4df7-8a09-765794883524
588 lines
15 KiB
C
588 lines
15 KiB
C
/** @file
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I/O Library.
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The implementation of I/O operation for this library instance
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are based on EFI_CPU_IO_PROTOCOL.
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Copyright (c) 2009 - 2010, Intel Corporation<BR>
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "SmmCpuIoLibInternal.h"
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/**
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Reads registers in the EFI CPU I/O space.
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Reads the I/O port specified by Port with registers width specified by Width.
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The read value is returned. If such operations are not supported, then ASSERT().
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This function must guarantee that all I/O read and write operations are serialized.
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@param Port The base address of the I/O operation.
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The caller is responsible for aligning the Address if required.
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@param Width The width of the I/O operation.
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@return Data read from registers in the EFI CPU I/O space.
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**/
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UINT64
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EFIAPI
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IoReadWorker (
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IN UINTN Port,
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IN EFI_SMM_IO_WIDTH Width
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)
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{
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EFI_STATUS Status;
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UINT64 Data;
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Status = gSmst->SmmIo.Io.Read (&gSmst->SmmIo, Width, Port, 1, &Data);
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ASSERT_EFI_ERROR (Status);
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return Data;
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}
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/**
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Writes registers in the EFI CPU I/O space.
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Writes the I/O port specified by Port with registers width and value specified by Width
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and Data respectively. Data is returned. If such operations are not supported, then ASSERT().
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This function must guarantee that all I/O read and write operations are serialized.
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@param Port The base address of the I/O operation.
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The caller is responsible for aligning the Address if required.
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@param Width The width of the I/O operation.
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@param Data The value to write to the I/O port.
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@return The paramter of Data.
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**/
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UINT64
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EFIAPI
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IoWriteWorker (
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IN UINTN Port,
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IN EFI_SMM_IO_WIDTH Width,
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IN UINT64 Data
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)
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{
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EFI_STATUS Status;
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Status = gSmst->SmmIo.Io.Write (&gSmst->SmmIo, Width, Port, 1, &Data);
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ASSERT_EFI_ERROR (Status);
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return Data;
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}
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/**
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Reads memory-mapped registers in the EFI system memory space.
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Reads the MMIO registers specified by Address with registers width specified by Width.
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The read value is returned. If such operations are not supported, then ASSERT().
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This function must guarantee that all MMIO read and write operations are serialized.
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@param Address The MMIO register to read.
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The caller is responsible for aligning the Address if required.
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@param Width The width of the I/O operation.
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@return Data read from registers in the EFI system memory space.
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**/
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UINT64
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EFIAPI
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MmioReadWorker (
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IN UINTN Address,
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IN EFI_SMM_IO_WIDTH Width
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)
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{
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EFI_STATUS Status;
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UINT64 Data;
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Status = gSmst->SmmIo.Mem.Read (&gSmst->SmmIo, Width, Address, 1, &Data);
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ASSERT_EFI_ERROR (Status);
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return Data;
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}
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/**
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Writes memory-mapped registers in the EFI system memory space.
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Writes the MMIO registers specified by Address with registers width and value specified by Width
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and Data respectively. Data is returned. If such operations are not supported, then ASSERT().
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This function must guarantee that all MMIO read and write operations are serialized.
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@param Address The MMIO register to read.
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The caller is responsible for aligning the Address if required.
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@param Width The width of the I/O operation.
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@param Data The value to write to the I/O port.
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@return Data read from registers in the EFI system memory space.
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**/
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UINT64
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EFIAPI
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MmioWriteWorker (
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IN UINTN Address,
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IN EFI_SMM_IO_WIDTH Width,
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IN UINT64 Data
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)
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{
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EFI_STATUS Status;
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Status = gSmst->SmmIo.Mem.Write (&gSmst->SmmIo, Width, Address, 1, &Data);
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ASSERT_EFI_ERROR (Status);
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return Data;
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}
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/**
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Reads an 8-bit I/O port.
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Reads the 8-bit I/O port specified by Port. The 8-bit read value is returned.
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This function must guarantee that all I/O read and write operations are
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serialized.
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If 8-bit I/O port operations are not supported, then ASSERT().
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@param Port The I/O port to read.
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@return The value read.
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**/
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UINT8
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EFIAPI
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IoRead8 (
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IN UINTN Port
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)
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{
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return (UINT8)IoReadWorker (Port, SMM_IO_UINT8);
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}
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/**
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Writes an 8-bit I/O port.
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Writes the 8-bit I/O port specified by Port with the value specified by Value
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and returns Value. This function must guarantee that all I/O read and write
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operations are serialized.
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If 8-bit I/O port operations are not supported, then ASSERT().
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@param Port The I/O port to write.
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@param Value The value to write to the I/O port.
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@return The value written the I/O port.
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**/
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UINT8
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EFIAPI
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IoWrite8 (
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IN UINTN Port,
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IN UINT8 Value
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)
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{
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return (UINT8)IoWriteWorker (Port, SMM_IO_UINT8, Value);
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}
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/**
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Reads a 16-bit I/O port.
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Reads the 16-bit I/O port specified by Port. The 16-bit read value is returned.
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This function must guarantee that all I/O read and write operations are
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serialized.
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If Port is not aligned on a 16-bit boundary, then ASSERT().
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If 16-bit I/O port operations are not supported, then ASSERT().
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@param Port The I/O port to read.
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@return The value read.
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**/
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UINT16
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EFIAPI
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IoRead16 (
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IN UINTN Port
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)
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{
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//
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// Make sure Port is aligned on a 16-bit boundary.
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//
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ASSERT ((Port & 1) == 0);
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return (UINT16)IoReadWorker (Port, SMM_IO_UINT16);
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}
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/**
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Writes a 16-bit I/O port.
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Writes the 16-bit I/O port specified by Port with the value specified by Value
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and returns Value. This function must guarantee that all I/O read and write
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operations are serialized.
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If Port is not aligned on a 16-bit boundary, then ASSERT().
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If 16-bit I/O port operations are not supported, then ASSERT().
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@param Port The I/O port to write.
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@param Value The value to write to the I/O port.
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@return The value written the I/O port.
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**/
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UINT16
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EFIAPI
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IoWrite16 (
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IN UINTN Port,
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IN UINT16 Value
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)
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{
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//
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// Make sure Port is aligned on a 16-bit boundary.
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//
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ASSERT ((Port & 1) == 0);
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return (UINT16)IoWriteWorker (Port, SMM_IO_UINT16, Value);
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}
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/**
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Reads a 32-bit I/O port.
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Reads the 32-bit I/O port specified by Port. The 32-bit read value is returned.
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This function must guarantee that all I/O read and write operations are
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serialized.
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If Port is not aligned on a 32-bit boundary, then ASSERT().
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If 32-bit I/O port operations are not supported, then ASSERT().
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@param Port The I/O port to read.
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@return The value read.
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**/
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UINT32
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EFIAPI
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IoRead32 (
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IN UINTN Port
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)
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{
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//
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// Make sure Port is aligned on a 32-bit boundary.
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//
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ASSERT ((Port & 3) == 0);
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return (UINT32)IoReadWorker (Port, SMM_IO_UINT32);
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}
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/**
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Writes a 32-bit I/O port.
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Writes the 32-bit I/O port specified by Port with the value specified by Value
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and returns Value. This function must guarantee that all I/O read and write
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operations are serialized.
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If Port is not aligned on a 32-bit boundary, then ASSERT().
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If 32-bit I/O port operations are not supported, then ASSERT().
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@param Port The I/O port to write.
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@param Value The value to write to the I/O port.
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@return The value written the I/O port.
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**/
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UINT32
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EFIAPI
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IoWrite32 (
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IN UINTN Port,
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IN UINT32 Value
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)
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{
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//
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// Make sure Port is aligned on a 32-bit boundary.
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//
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ASSERT ((Port & 3) == 0);
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return (UINT32)IoWriteWorker (Port, SMM_IO_UINT32, Value);
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}
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/**
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Reads a 64-bit I/O port.
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Reads the 64-bit I/O port specified by Port. The 64-bit read value is returned.
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This function must guarantee that all I/O read and write operations are
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serialized.
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If Port is not aligned on a 64-bit boundary, then ASSERT().
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If 64-bit I/O port operations are not supported, then ASSERT().
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@param Port The I/O port to read.
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@return The value read.
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**/
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UINT64
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EFIAPI
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IoRead64 (
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IN UINTN Port
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)
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{
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//
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// Make sure Port is aligned on a 64-bit boundary.
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//
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ASSERT ((Port & 7) == 0);
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return IoReadWorker (Port, SMM_IO_UINT64);
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}
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/**
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Writes a 64-bit I/O port.
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Writes the 64-bit I/O port specified by Port with the value specified by Value
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and returns Value. This function must guarantee that all I/O read and write
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operations are serialized.
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If Port is not aligned on a 64-bit boundary, then ASSERT().
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If 64-bit I/O port operations are not supported, then ASSERT().
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@param Port The I/O port to write.
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@param Value The value to write to the I/O port.
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@return The value written the I/O port.
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**/
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UINT64
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EFIAPI
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IoWrite64 (
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IN UINTN Port,
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IN UINT64 Value
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)
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{
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//
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// Make sure Port is aligned on a 64-bit boundary.
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//
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ASSERT ((Port & 7) == 0);
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return IoWriteWorker (Port, SMM_IO_UINT64, Value);
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}
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/**
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Reads an 8-bit MMIO register.
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Reads the 8-bit MMIO register specified by Address. The 8-bit read value is
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returned. This function must guarantee that all MMIO read and write
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operations are serialized.
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If 8-bit MMIO register operations are not supported, then ASSERT().
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@param Address The MMIO register to read.
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@return The value read.
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**/
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UINT8
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EFIAPI
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MmioRead8 (
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IN UINTN Address
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)
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{
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return (UINT8)MmioReadWorker (Address, SMM_IO_UINT8);
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}
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/**
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Writes an 8-bit MMIO register.
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Writes the 8-bit MMIO register specified by Address with the value specified
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by Value and returns Value. This function must guarantee that all MMIO read
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and write operations are serialized.
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If 8-bit MMIO register operations are not supported, then ASSERT().
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@param Address The MMIO register to write.
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@param Value The value to write to the MMIO register.
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**/
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UINT8
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EFIAPI
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MmioWrite8 (
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IN UINTN Address,
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IN UINT8 Value
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)
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{
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return (UINT8)MmioWriteWorker (Address, SMM_IO_UINT8, Value);
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}
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/**
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Reads a 16-bit MMIO register.
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Reads the 16-bit MMIO register specified by Address. The 16-bit read value is
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returned. This function must guarantee that all MMIO read and write
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operations are serialized.
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If Address is not aligned on a 16-bit boundary, then ASSERT().
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If 16-bit MMIO register operations are not supported, then ASSERT().
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@param Address The MMIO register to read.
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@return The value read.
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**/
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UINT16
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EFIAPI
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MmioRead16 (
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IN UINTN Address
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)
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{
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//
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// Make sure Address is aligned on a 16-bit boundary.
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//
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ASSERT ((Address & 1) == 0);
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return (UINT16)MmioReadWorker (Address, SMM_IO_UINT16);
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}
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/**
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Writes a 16-bit MMIO register.
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Writes the 16-bit MMIO register specified by Address with the value specified
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by Value and returns Value. This function must guarantee that all MMIO read
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and write operations are serialized.
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If Address is not aligned on a 16-bit boundary, then ASSERT().
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If 16-bit MMIO register operations are not supported, then ASSERT().
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@param Address The MMIO register to write.
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@param Value The value to write to the MMIO register.
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**/
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UINT16
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EFIAPI
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MmioWrite16 (
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IN UINTN Address,
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IN UINT16 Value
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)
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{
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//
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// Make sure Address is aligned on a 16-bit boundary.
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//
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ASSERT ((Address & 1) == 0);
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return (UINT16)MmioWriteWorker (Address, SMM_IO_UINT16, Value);
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}
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/**
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Reads a 32-bit MMIO register.
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Reads the 32-bit MMIO register specified by Address. The 32-bit read value is
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returned. This function must guarantee that all MMIO read and write
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operations are serialized.
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If Address is not aligned on a 32-bit boundary, then ASSERT().
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If 32-bit MMIO register operations are not supported, then ASSERT().
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@param Address The MMIO register to read.
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@return The value read.
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**/
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UINT32
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EFIAPI
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MmioRead32 (
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IN UINTN Address
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)
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{
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//
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// Make sure Address is aligned on a 32-bit boundary.
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//
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ASSERT ((Address & 3) == 0);
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return (UINT32)MmioReadWorker (Address, SMM_IO_UINT32);
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}
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/**
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Writes a 32-bit MMIO register.
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Writes the 32-bit MMIO register specified by Address with the value specified
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by Value and returns Value. This function must guarantee that all MMIO read
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and write operations are serialized.
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If Address is not aligned on a 32-bit boundary, then ASSERT().
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If 32-bit MMIO register operations are not supported, then ASSERT().
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@param Address The MMIO register to write.
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@param Value The value to write to the MMIO register.
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**/
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UINT32
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EFIAPI
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MmioWrite32 (
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IN UINTN Address,
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IN UINT32 Value
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)
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{
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//
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// Make sure Address is aligned on a 32-bit boundary.
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//
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ASSERT ((Address & 3) == 0);
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return (UINT32)MmioWriteWorker (Address, SMM_IO_UINT32, Value);
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}
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/**
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Reads a 64-bit MMIO register.
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Reads the 64-bit MMIO register specified by Address. The 64-bit read value is
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returned. This function must guarantee that all MMIO read and write
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operations are serialized.
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If Address is not aligned on a 64-bit boundary, then ASSERT().
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If 64-bit MMIO register operations are not supported, then ASSERT().
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@param Address The MMIO register to read.
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@return The value read.
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**/
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UINT64
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EFIAPI
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MmioRead64 (
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IN UINTN Address
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)
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{
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//
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// Make sure Address is aligned on a 64-bit boundary.
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//
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ASSERT ((Address & 7) == 0);
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return (UINT64)MmioReadWorker (Address, SMM_IO_UINT64);
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}
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/**
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Writes a 64-bit MMIO register.
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Writes the 64-bit MMIO register specified by Address with the value specified
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by Value and returns Value. This function must guarantee that all MMIO read
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and write operations are serialized.
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If Address is not aligned on a 64-bit boundary, then ASSERT().
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If 64-bit MMIO register operations are not supported, then ASSERT().
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@param Address The MMIO register to write.
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@param Value The value to write to the MMIO register.
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**/
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UINT64
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EFIAPI
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MmioWrite64 (
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IN UINTN Address,
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IN UINT64 Value
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)
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{
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//
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// Make sure Address is aligned on a 64-bit boundary.
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//
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ASSERT ((Address & 7) == 0);
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return (UINT64)MmioWriteWorker (Address, SMM_IO_UINT64, Value);
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}
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