/** @file | |
Hardware IO based debug commands | |
Copyright (c) 2007, Intel Corporation<BR> | |
Portions copyright (c) 2008-2009, Apple Inc. All rights reserved. | |
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. | |
Commands useful for debugging hardware. IO commands seperated out as not all | |
processor architectures support the IO command. | |
**/ | |
#include "Ebl.h" | |
/** | |
Read from IO space | |
Argv[0] - "ioread"[.#] # is optiona 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 comamnd 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 optiona 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 comamnd 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)); | |
} | |
} | |