sleep.c

MIPS下的boottloader yamon 的源代码

/************************************************************************
 *
 *  sleep.c
 *
 *  Monitor "sleep" command
 *
 *  sleep <ms>
 *
 *
 * ######################################################################
 *
 * Copyright (c) 1999-2000 MIPS Technologies, Inc. All rights reserved. 
 * 
 * Unpublished rights reserved under the Copyright Laws of the United States of 
 * America. 
 * 
 * This document contains information that is proprietary to MIPS Technologies, 
 * Inc. ("MIPS Technologies"). Any copying, modifying or use of this information 
 * (in whole or in part) which is not expressly permitted in writing by MIPS 
 * Technologies or a contractually-authorized third party is strictly 
 * prohibited. At a minimum, this information is protected under unfair 
 * competition laws and the expression of the information contained herein is 
 * protected under federal copyright laws. Violations thereof may result in 
 * criminal penalties and fines. 
 * MIPS Technologies or any contractually-authorized third party reserves the 
 * right to change the information contained in this document to improve 
 * function, design or otherwise. MIPS Technologies does not assume any 
 * liability arising out of the application or use of this information. Any 
 * license under patent rights or any other intellectual property rights owned 
 * by MIPS Technologies or third parties shall be conveyed by MIPS Technologies 
 * or any contractually-authorized third party in a separate license agreement 
 * between the parties. 
 * The information contained in this document constitutes one or more of the 
 * following: commercial computer software, commercial computer software 
 * documentation or other commercial items. If the user of this information, or 
 * any related documentation of any kind, including related technical data or 
 * manuals, is an agency, department, or other entity of the United States 
 * government ("Government"), the use, duplication, reproduction, release, 
 * modification, disclosure, or transfer of this information, or any related 
 * documentation of any kind, is restricted in accordance with Federal 
 * Acquisition Regulation 12.212 for civilian agencies and Defense Federal 
 * Acquisition Regulation Supplement 227.7202 for military agencies. The use of 
 * this information by the Government is further restricted in accordance with 
 * the terms of the license agreement(s) and/or applicable contract terms and 
 * conditions covering this information from MIPS Technologies or any 
 * contractually-authorized third party. 
 *
 ************************************************************************/


/************************************************************************
 *  Include files
 ************************************************************************/

#include <sysdefs.h>
#include <sys_api.h>
#include <shell_api.h>
#include "shell.h"

/************************************************************************
 *  Definitions
 ************************************************************************/

/************************************************************************
 *  Public variables
 ************************************************************************/

/************************************************************************
 *  Static variables
 ************************************************************************/

/************************************************************************
 *  Static function prototypes
 ************************************************************************/

static UINT32 
get_options(
    UINT32 argc,
    char   **argv,
    UINT32 *ms );

/************************************************************************
 *  Implementation : Static functions
 ************************************************************************/

/************************************************************************
 *                          sleep
 ************************************************************************/
static MON_FUNC(sleep)
{
    UINT32 rc;
    UINT32 ms;

    rc = get_options( argc, argv, &ms );

    if( rc != OK )
        return rc;
    else
    {
        do
	{
	    if( ms < 10 )
	    {
                sys_wait_ms( ms );
		ms = 0;
	    }
	    else
	    {
		sys_wait_ms( 10 );
		ms -= 10;

		if( GETCHAR_CTRLC( DEFAULT_PORT ) )
 	            return SHELL_ERROR_CONTROL_C_DETECTED;
	    }
	}
	while( ms );

	return OK;
    }
}


/************************************************************************
 *                          get_options
 ************************************************************************/
static UINT32
get_options(
    UINT32 argc,
    char   **argv,
    UINT32 *ms )
{
    t_shell_option decode;
    UINT32	   type;

    if( argc != 2 )
        return SHELL_ERROR_SYNTAX;

    shell_decode_token( argv[1], &type, &decode );

    switch( type )
    {
      case SHELL_TOKEN_OPTION :
	shell_error_data = argv[1];
	return SHELL_ERROR_OPTION;
      case SHELL_TOKEN_NUMBER :
	*ms = decode.number;
	return OK;
      default :
	return SHELL_ERROR_SYNTAX;
    }
}

/* Command definition for dump */
static t_cmd cmd_def =
{
    "sleep",
    sleep,
    "sleep <ms>",

    "Halt shell for the specified number of milliseconds.\n"
    "Note that the default number format is hexadecimal.",

    NULL,
    0,
    FALSE
};


/************************************************************************
 *  Implementation : Public functions
 ************************************************************************/

/************************************************************************
 *
 *                          shell_sleep_init
 *  Description :
 *  -------------
 *
 *  Initialise command
 *
 *  Return values :
 *  ---------------
 *
 *  void
 *
 ************************************************************************/
t_cmd *
shell_sleep_init( void )
{
    return &cmd_def;
}