cpu_insn.h

日本著名的的嵌入式实时操作系统T-Kernel的源码及用户手册。

/*
 *----------------------------------------------------------------------
 *    T-Kernel
 *
 *    Copyright (C) 2004 by Ken Sakamura. All rights reserved.
 *    T-Kernel is distributed under the T-License.
 *----------------------------------------------------------------------
 *
 *    Version:   1.01.00
 *    Released by T-Engine Forum(http://www.t-engine.org) at 2004/6/28.
 *
 *----------------------------------------------------------------------
 */

/*
 *	cpu_insn.h (M32104)
 *	M32104-Dependant Operation
 */

#ifndef _CPU_INSN_
#define _CPU_INSN_

#include <sys/sysinfo.h>

/* ------------------------------------------------------------------------ */
/*
 *	Control register operation
 */

/*
 * Get PSW
 */
Inline UINT getPSW( void )
{
	UINT	psw;
	Asm("mvfc %0, psw" : "=r"(psw));
	return psw;
}

/* ------------------------------------------------------------------------ */
/*
 *	EIT-related
 */

/*
 * Monitor use vector number
 */
#define	VECNO_DEFAULT	EIT_DEFAULT	/* Default handler */
#define	VECNO_MONITOR	EIT_TRAP(0)	/* Monitor service call */
#define	VECNO_BREAK	EIT_TRAP(1)	/* Break point */
#define	VECNO_ICU2	EIT_ICU1(2)	/* PLD ICU (ICU2) handler */
#define	VECNO_INT5	EIT_ICU1(6)	/* Interrupt switch (INT5) */

/*
 * For saving monitor exception handler
 */
typedef struct monhdr {
	FP	default_hdr;		/* Default handler */
	FP	monitor_hdr;		/* Monitor service call */
	FP	break_hdr;		/* Break point */
	FP	icu2_hdr;		/* PLD ICU (ICU2) handler */
	FP	int5_hdr;		/* Interrupt switch (INT5) */
} MONHDR;

/* For saving monitor exception handler */
IMPORT MONHDR	SaveMonHdr;

/*
 * Set interrupt handler
 */
Inline void define_inthdr( INT vecno, FP inthdr )
{
	SCArea->intvec[vecno] = inthdr;
}

/*
 * If it is the task-independent part, TRUE
 *	Judge by PSW register's SM (stack mode).
 *	SM = 0 (Use an interrupt stack)	Task independent part
 *	SM = 1 (Use a user stack)	Task part
 */
Inline BOOL isTaskIndependent( void )
{
	return ( (getPSW() & PSW_SM) == 0 )? TRUE: FALSE;
}

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

#endif /* _CPU_INSN_ */