mirror of https://github.com/acidanthera/audk.git
Merge from edk2/MdePkg/Library/BaseIoLibIntrinsic to achieve better
support for additional compilers. git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5277 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
parent
8e98644530
commit
e2955fba07
|
@ -23,17 +23,21 @@
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BASE_NAME = EdkIIGlueBaseIoLibIntrinsic
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COMPONENT_TYPE = LIBRARY
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[sources.common]
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[Sources.common]
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[sources.ia32]
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IoLib.c
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IoLibMsc.c
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[Sources.Ia32]
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IoHighLevel.c
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IoLibGcc.c | GCC
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IoLibMsc.c | MSFT
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IoLibIcc.c | INTEL
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IoLib.c
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[sources.x64]
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IoLib.c
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IoLibMsc.c
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[Sources.X64]
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IoHighLevel.c
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IoLibGcc.c | GCC
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IoLibMsc.c | MSFT
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IoLibIcc.c | INTEL
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IoLib.c
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[sources.ipf]
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IoLibIpf.c
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|
|
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@ -0,0 +1,28 @@
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/**@file
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Common header file shared by all source files.
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This file includes package header files, library classes and protocol, PPI & GUID definitions.
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Copyright (c) 2007, Intel Corporation.
|
||||
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.
|
||||
**/
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#ifndef __COMMON_HEADER_H_
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#define __COMMON_HEADER_H_
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#include <EdkIIGlueBase.h>
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#include <Library/EdkIIGlueIoLib.h>
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#include <Library/EdkIIGlueBaseLib.h>
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#include <Library/EdkIIGlueDebugLib.h>
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#include <Pcd/EdkIIGluePcd.h>
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#endif
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@ -0,0 +1,386 @@
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/** @file
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I/O Library. This file has compiler specifics for GCC as there is no
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ANSI C standard for doing IO.
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GCC - uses EFIAPI assembler. __asm__ calls GAS. __volatile__ makes sure the
|
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compiler puts the assembler in this exact location. The complex GNUC
|
||||
operations are not optimzed. It would be possible to also write these
|
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with EFIAPI assembler.
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We don't advocate putting compiler specifics in libraries or drivers but there
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||||
is no other way to make this work.
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||||
|
||||
Copyright (c) 2006 - 2007, 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.
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||||
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**/
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//
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// Include common header file for this module.
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//
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#include "BaseIoLibIntrinsicInternal.h"
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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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|
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If 8-bit MMIO register operations are not supported, then ASSERT().
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|
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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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**/
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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 *(volatile UINT8*)Address;
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}
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|
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/**
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Writes an 8-bit MMIO register.
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|
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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
|
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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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|
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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 (
|
||||
IN UINTN Address,
|
||||
IN UINT8 Value
|
||||
)
|
||||
{
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return *(volatile UINT8*)Address = Value;
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}
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|
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/**
|
||||
Reads a 16-bit MMIO register.
|
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|
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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
|
||||
operations are serialized.
|
||||
|
||||
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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|
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@return The value read.
|
||||
|
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**/
|
||||
UINT16
|
||||
EFIAPI
|
||||
MmioRead16 (
|
||||
IN UINTN Address
|
||||
)
|
||||
{
|
||||
ASSERT ((Address & 1) == 0);
|
||||
return *(volatile UINT16*)Address;
|
||||
}
|
||||
|
||||
/**
|
||||
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
|
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and write operations are serialized.
|
||||
|
||||
If 16-bit MMIO register operations are not supported, then ASSERT().
|
||||
|
||||
@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
|
||||
EFIAPI
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||||
MmioWrite16 (
|
||||
IN UINTN Address,
|
||||
IN UINT16 Value
|
||||
)
|
||||
{
|
||||
ASSERT ((Address & 1) == 0);
|
||||
return *(volatile UINT16*)Address = 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 32-bit MMIO register operations are not supported, then ASSERT().
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||||
|
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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
|
||||
EFIAPI
|
||||
MmioRead32 (
|
||||
IN UINTN Address
|
||||
)
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||||
{
|
||||
ASSERT ((Address & 3) == 0);
|
||||
return *(volatile UINT32*)Address;
|
||||
}
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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
|
||||
by Value and returns Value. This function must guarantee that all MMIO read
|
||||
and write operations are serialized.
|
||||
|
||||
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.
|
||||
|
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**/
|
||||
UINT32
|
||||
EFIAPI
|
||||
MmioWrite32 (
|
||||
IN UINTN Address,
|
||||
IN UINT32 Value
|
||||
)
|
||||
{
|
||||
ASSERT ((Address & 3) == 0);
|
||||
return *(volatile UINT32*)Address = 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 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
|
||||
)
|
||||
{
|
||||
ASSERT ((Address & 7) == 0);
|
||||
return *(volatile UINT64*)Address;
|
||||
}
|
||||
|
||||
/**
|
||||
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 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
|
||||
)
|
||||
{
|
||||
ASSERT ((Address & 7) == 0);
|
||||
return *(volatile UINT64*)Address = Value;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/**
|
||||
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.
|
||||
|
||||
**/
|
||||
__inline__
|
||||
UINT8
|
||||
EFIAPI
|
||||
IoRead8 (
|
||||
IN UINTN Port
|
||||
)
|
||||
{
|
||||
UINT8 Data;
|
||||
|
||||
__asm__ __volatile__ ("inb %w1,%b0" : "=a" (Data) : "d" ((UINT16)Port));
|
||||
return Data;
|
||||
}
|
||||
|
||||
/**
|
||||
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.
|
||||
|
||||
**/
|
||||
__inline__
|
||||
UINT8
|
||||
EFIAPI
|
||||
IoWrite8 (
|
||||
IN UINTN Port,
|
||||
IN UINT8 Value
|
||||
)
|
||||
{
|
||||
__asm__ __volatile__ ("outb %b0,%w1" : : "a" (Value), "d" ((UINT16)Port));
|
||||
return 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 16-bit I/O port operations are not supported, then ASSERT().
|
||||
|
||||
@param Port The I/O port to read.
|
||||
|
||||
@return The value read.
|
||||
|
||||
**/
|
||||
__inline__
|
||||
UINT16
|
||||
EFIAPI
|
||||
IoRead16 (
|
||||
IN UINTN Port
|
||||
)
|
||||
{
|
||||
UINT16 Data;
|
||||
|
||||
ASSERT ((Port & 1) == 0);
|
||||
__asm__ __volatile__ ("inw %w1,%w0" : "=a" (Data) : "d" ((UINT16)Port));
|
||||
return Data;
|
||||
}
|
||||
|
||||
/**
|
||||
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 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.
|
||||
|
||||
**/
|
||||
__inline__
|
||||
UINT16
|
||||
EFIAPI
|
||||
IoWrite16 (
|
||||
IN UINTN Port,
|
||||
IN UINT16 Value
|
||||
)
|
||||
{
|
||||
ASSERT ((Port & 1) == 0);
|
||||
__asm__ __volatile__ ("outw %w0,%w1" : : "a" (Value), "d" ((UINT16)Port));
|
||||
return 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 32-bit I/O port operations are not supported, then ASSERT().
|
||||
|
||||
@param Port The I/O port to read.
|
||||
|
||||
@return The value read.
|
||||
|
||||
**/
|
||||
__inline__
|
||||
UINT32
|
||||
EFIAPI
|
||||
IoRead32 (
|
||||
IN UINTN Port
|
||||
)
|
||||
{
|
||||
UINT32 Data;
|
||||
|
||||
ASSERT ((Port & 3) == 0);
|
||||
__asm__ __volatile__ ("inl %w1,%0" : "=a" (Data) : "d" ((UINT16)Port));
|
||||
return Data;
|
||||
}
|
||||
|
||||
/**
|
||||
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 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.
|
||||
|
||||
**/
|
||||
__inline__
|
||||
UINT32
|
||||
EFIAPI
|
||||
IoWrite32 (
|
||||
IN UINTN Port,
|
||||
IN UINT32 Value
|
||||
)
|
||||
{
|
||||
ASSERT ((Port & 3) == 0);
|
||||
__asm__ __volatile__ ("outl %0,%w1" : : "a" (Value), "d" ((UINT16)Port));
|
||||
return Value;
|
||||
}
|
||||
|
|
@ -0,0 +1,408 @@
|
|||
/** @file
|
||||
I/O Library. This file has compiler specifics for ICC as there
|
||||
is no ANSI C standard for doing IO.
|
||||
|
||||
Copyright (c) 2006 - 2007, 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 common header file for this module.
|
||||
//
|
||||
#include "BaseIoLibIntrinsicInternal.h"
|
||||
|
||||
/**
|
||||
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 *(volatile UINT8*)Address;
|
||||
}
|
||||
|
||||
/**
|
||||
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 *(volatile UINT8*)Address = 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 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
|
||||
)
|
||||
{
|
||||
ASSERT ((Address & 1) == 0);
|
||||
return *(volatile UINT16*)Address;
|
||||
}
|
||||
|
||||
/**
|
||||
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 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
|
||||
)
|
||||
{
|
||||
ASSERT ((Address & 1) == 0);
|
||||
return *(volatile UINT16*)Address = 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 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
|
||||
)
|
||||
{
|
||||
ASSERT ((Address & 3) == 0);
|
||||
return *(volatile UINT32*)Address;
|
||||
}
|
||||
|
||||
/**
|
||||
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 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
|
||||
)
|
||||
{
|
||||
ASSERT ((Address & 3) == 0);
|
||||
return *(volatile UINT32*)Address = 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 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
|
||||
)
|
||||
{
|
||||
ASSERT ((Address & 7) == 0);
|
||||
return *(volatile UINT64*)Address;
|
||||
}
|
||||
|
||||
/**
|
||||
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 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
|
||||
)
|
||||
{
|
||||
ASSERT ((Address & 7) == 0);
|
||||
return *(volatile UINT64*)Address = Value;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/**
|
||||
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
|
||||
)
|
||||
{
|
||||
UINT8 Data;
|
||||
|
||||
__asm {
|
||||
mov dx, word ptr [Port]
|
||||
in al, dx
|
||||
|
||||
mov Data, al
|
||||
}
|
||||
return Data;
|
||||
}
|
||||
|
||||
/**
|
||||
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
|
||||
)
|
||||
{
|
||||
__asm {
|
||||
mov al, byte ptr [Value]
|
||||
mov dx, word ptr [Port]
|
||||
out dx, al
|
||||
}
|
||||
return 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 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
|
||||
)
|
||||
{
|
||||
UINT16 Data;
|
||||
|
||||
ASSERT ((Port & 1) == 0);
|
||||
|
||||
__asm {
|
||||
mov dx, word ptr [Port]
|
||||
in ax, dx
|
||||
mov word ptr [Data], ax
|
||||
}
|
||||
|
||||
return Data;
|
||||
}
|
||||
|
||||
/**
|
||||
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 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
|
||||
)
|
||||
{
|
||||
ASSERT ((Port & 1) == 0);
|
||||
|
||||
__asm {
|
||||
mov ax, word ptr [Value]
|
||||
mov dx, word ptr [Port]
|
||||
out dx, ax
|
||||
}
|
||||
|
||||
//
|
||||
// Never reached return statement.
|
||||
//
|
||||
return 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 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
|
||||
)
|
||||
{
|
||||
UINT32 Data;
|
||||
|
||||
ASSERT ((Port & 3) == 0);
|
||||
|
||||
__asm {
|
||||
mov dx, word ptr [Port]
|
||||
in eax, dx
|
||||
mov dword ptr [Data], eax
|
||||
}
|
||||
|
||||
return Data;
|
||||
}
|
||||
|
||||
/**
|
||||
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 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
|
||||
)
|
||||
{
|
||||
ASSERT ((Port & 3) == 0);
|
||||
|
||||
__asm {
|
||||
mov eax, dword ptr [Value]
|
||||
mov dx, word ptr [Port]
|
||||
out dx, eax
|
||||
}
|
||||
|
||||
return Value;
|
||||
}
|
||||
|
Loading…
Reference in New Issue