devinit.c

使用广泛的日本著名的开源嵌入式实时操作系统T-Kernel的源码

/*
 *----------------------------------------------------------------------
 *    T-Kernel
 *
 *    Copyright (C) 2004-2006 by Ken Sakamura. All rights reserved.
 *    T-Kernel is distributed under the T-License.
 *----------------------------------------------------------------------
 *
 *    Version:   1.02.02
 *    Released by T-Engine Forum(http://www.t-engine.org) at 2006/8/9.
 *
 *----------------------------------------------------------------------
 */

/*
 *	devinit.c (M32104)
 *	Device-Dependent Initialization
 */

#include "sysinit.h"
#include "kernel.h"
#include <sys/sysinfo.h>
#include <sys/rominfo.h>
#include <device/devconf.h>

/* Saved data of system common information */
EXPORT	SysCommonInfo	SaveSCInfo;

/*
 * Display the progress of start processing
 *	0x10 - 0x1F : Initialization (before kernel starts)
 *	0x20 - 0x2F : Kernel start processing
 *	0x30 - 0x3F : Start processing (after kernel starts)
 */
EXPORT void DispProgress( W n )
{
}

/* ------------------------------------------------------------------------ */

/*
 * Initialization before T-Kernel starts
 */
EXPORT ER init_device( void )
{
IMPORT void CountWaitUsec( void );	/* cntwus.c */

	W	val[L_DEVCONF_VAL];
	W	n;

	/* Compute loop count of micro second wait */
	CountWaitUsec();

	/* Set SYSCONF/DEVCONF */
	SCInfo.sysconf = ROMInfo->sysconf;
	SCInfo.devconf = ROMInfo->devconf;

	/* Set debug mode */
	n = GetDevConf(DCTAG_DEBUGMODE, val);
	SCInfo.bm.c.debug = ( n >= 1 && val[0] > 0 )? 1: 0;

	/* Save system common information */
	SaveSCInfo = SCInfo;

	return E_OK;
}

/* ------------------------------------------------------------------------ */
/*
 * Start processing after T-Kernel starts
 *	Called from the initial task contexts.
 */
EXPORT ER start_device( void )
{
	return E_OK;
}

/* ------------------------------------------------------------------------ */
/*
 * System finalization
 *	Called just before system shutdown.
 *	Execute finalization that must be done before system shutdown.
 */
EXPORT ER finish_device( void )
{
	return E_OK;
}

/* ------------------------------------------------------------------------ */
/*
 *	Re-starting processing
 */

/*
 * Re-starting processing
 *	mode = -1		Reset and re-start	(cold boot)
 *	mode = -2		Re-start		(warm boot)
 *	mode = -3		Reboot			(normal boot)
 *	mode = 0xFFhhmmss	Re-start at hh:mm:ss
 *				0 <= hh < 24, 0 <= mm,ss < 60
 */
EXPORT ER restart_device( W mode )
{
	if ( mode == -1 ) {
		/* Reset and re-start (cold boot) */
#if USE_KERNEL_MESSAGE
		tm_putstring((UB*)"\n<< SYSTEM RESTART >>\n");
#endif
		tm_exit(-1);  /* no return */
		return E_OBJ;
	}

	if ( mode == -3 ) {
		/* Reboot (normal boot) */	/* Unsupported */
		return E_NOSPT;
	}

	if ( mode == -2 ) {
		return E_NOSPT; /* Unsupported */
	}

	if ( (mode & 0xff000000) == 0xff000000 ) {
		/* Re-start at specified time */
		return E_NOSPT;	/* Unsupported */
	}

	return E_PAR;
}