mirror of https://github.com/acidanthera/audk.git
155 lines
3.5 KiB
C
155 lines
3.5 KiB
C
/** @file
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Hardware IO based debug commands
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Copyright (c) 2007, Intel Corporation. All rights reserved.<BR>
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Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
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(C) Copyright 2015 Hewlett Packard Enterprise Development LP<BR>
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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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Commands useful for debugging hardware. IO commands separated out as not all
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processor architectures support the IO command.
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**/
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#include "Ebl.h"
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/**
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Read from IO space
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Argv[0] - "ioread"[.#] # is optional width 1, 2, or 4. Default 1
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Argv[1] - Hex IO address
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ior.4 0x3f8 ;Do a 32-bit IO Read from 0x3f8
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ior 0x3f8 ;Do a 8-bit IO Read from 0x3f8
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@param Argc Number of command arguments in Argv
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@param Argv Array of strings that represent the parsed command line.
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Argv[0] is the command name
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@return EFI_SUCCESS
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**/
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EFI_STATUS
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EFIAPI
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EblIoReadCmd (
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IN UINTN Argc,
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IN CHAR8 **Argv
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)
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{
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UINTN Width;
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UINTN Port;
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UINTN Data;
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if (Argc < 2) {
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return EFI_INVALID_PARAMETER;
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}
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Port = AsciiStrHexToUintn (Argv[1]);
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Width = WidthFromCommandName (Argv[0], 1);
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if (Width == 1) {
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Data = IoRead8 (Port);
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} else if (Width == 2) {
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Data = IoRead16 (Port);
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} else if (Width == 4) {
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Data = IoRead32 (Port);
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} else {
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return EFI_INVALID_PARAMETER;
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}
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AsciiPrint ("0x%04x = 0x%x", Port, Data);
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return EFI_SUCCESS;
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}
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/**
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Write to IO space
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Argv[0] - "iowrite"[.#] # is optional width 1, 2, or 4. Default 1
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Argv[1] - Hex IO address
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Argv[2] - Hex data to write
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iow.4 0x3f8 af ;Do a 32-bit IO write of af to 0x3f8
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iow 0x3f8 af ;Do an 8-bit IO write of af to 0x3f8
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@param Argc Number of command arguments in Argv
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@param Argv Array of strings that represent the parsed command line.
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Argv[0] is the command name
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@return EFI_SUCCESS
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**/
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EFI_STATUS
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EFIAPI
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EblIoWriteCmd (
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IN UINTN Argc,
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IN CHAR8 **Argv
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)
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{
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UINTN Width;
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UINTN Port;
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UINTN Data;
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if (Argc < 3) {
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return EFI_INVALID_PARAMETER;
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}
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Port = AsciiStrHexToUintn (Argv[1]);
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Data = AsciiStrHexToUintn (Argv[2]);
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Width = WidthFromCommandName (Argv[0], 1);
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if (Width == 1) {
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IoWrite8 (Port, (UINT8)Data);
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} else if (Width == 2) {
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IoWrite16 (Port, (UINT16)Data);
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} else if (Width == 4) {
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IoWrite32 (Port, (UINT32)Data);
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} else {
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return EFI_INVALID_PARAMETER;
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}
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return EFI_SUCCESS;
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}
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GLOBAL_REMOVE_IF_UNREFERENCED const EBL_COMMAND_TABLE mCmdHwIoDebugTemplate[] =
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{
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{
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"ioread",
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"[.{1|2|4}] Port ; IO read of width byte(s) from Port",
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NULL,
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EblIoReadCmd
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},
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{
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"iowrite",
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"[.{1|2|4}] Port Data ; IO write Data of width byte(s) to Port",
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NULL,
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EblIoWriteCmd
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}
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};
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/**
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Initialize the commands in this in this file
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**/
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VOID
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EblInitializemdHwIoDebugCmds (
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VOID
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)
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{
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if (FeaturePcdGet (PcdEmbeddedIoEnable)) {
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EblAddCommands (mCmdHwIoDebugTemplate, sizeof (mCmdHwIoDebugTemplate)/sizeof (EBL_COMMAND_TABLE));
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}
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}
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