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/** @file
Hardware IO based debug commands
Copyright (c) 2007, Intel Corporation. All rights reserved.<BR>
Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
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.
Commands useful for debugging hardware. IO commands separated out as not all
processor architectures support the IO command.
**/
#include "Ebl.h"
/**
Read from IO space
Argv[0] - "ioread"[.#] # is optional width 1, 2, or 4. Default 1
Argv[1] - Hex IO address
ior.4 0x3f8 ;Do a 32-bit IO Read from 0x3f8
ior 0x3f8 ;Do a 8-bit IO Read from 0x3f8
@param Argc Number of command arguments in Argv
@param Argv Array of strings that represent the parsed command line.
Argv[0] is the command name
@return EFI_SUCCESS
**/
EFI_STATUS
EblIoReadCmd (
IN UINTN Argc,
IN CHAR8 **Argv
)
{
UINTN Width;
UINTN Port;
UINTN Data;
if (Argc < 2) {
return EFI_INVALID_PARAMETER;
}
Port = AsciiStrHexToUintn (Argv[1]);
Width = WidthFromCommandName (Argv[0], 1);
if (Width == 1) {
Data = IoRead8 (Port);
} else if (Width == 2) {
Data = IoRead16 (Port);
} else if (Width == 4) {
Data = IoRead32 (Port);
} else {
return EFI_INVALID_PARAMETER;
}
AsciiPrint ("0x%04x = 0x%x", Port, Data);
return EFI_SUCCESS;
}
/**
Write to IO space
Argv[0] - "iowrite"[.#] # is optional width 1, 2, or 4. Default 1
Argv[1] - Hex IO address
Argv[2] - Hex data to write
iow.4 0x3f8 af ;Do a 32-bit IO write of af to 0x3f8
iow 0x3f8 af ;Do an 8-bit IO write of af to 0x3f8
@param Argc Number of command arguments in Argv
@param Argv Array of strings that represent the parsed command line.
Argv[0] is the command name
@return EFI_SUCCESS
**/
EFI_STATUS
EblIoWriteCmd (
IN UINTN Argc,
IN CHAR8 **Argv
)
{
UINTN Width;
UINTN Port;
UINTN Data;
if (Argc < 3) {
return EFI_INVALID_PARAMETER;
}
Port = AsciiStrHexToUintn (Argv[1]);
Data = AsciiStrHexToUintn (Argv[2]);
Width = WidthFromCommandName (Argv[0], 1);
if (Width == 1) {
IoWrite8 (Port, (UINT8)Data);
} else if (Width == 2) {
IoWrite16 (Port, (UINT16)Data);
} else if (Width == 4) {
IoWrite32 (Port, (UINT32)Data);
} else {
return EFI_INVALID_PARAMETER;
}
return EFI_SUCCESS;
}
GLOBAL_REMOVE_IF_UNREFERENCED const EBL_COMMAND_TABLE mCmdHwIoDebugTemplate[] =
{
{
"ioread",
"[.{1|2|4}] Port ; IO read of width byte(s) from Port",
NULL,
EblIoReadCmd
},
{
"iowrite",
"[.{1|2|4}] Port Data ; IO write Data of width byte(s) to Port",
NULL,
EblIoWriteCmd
}
};
/**
Initialize the commands in this in this file
**/
VOID
EblInitializemdHwIoDebugCmds (
VOID
)
{
if (FeaturePcdGet (PcdEmbeddedIoEnable)) {
EblAddCommands (mCmdHwIoDebugTemplate, sizeof (mCmdHwIoDebugTemplate)/sizeof (EBL_COMMAND_TABLE));
}
}
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