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 (MB87Q1100)
 *	MB87Q1100 Dependant Operation
 */

#ifndef _CPU_INSN_
#define _CPU_INSN_

#include <sys/sysinfo.h>

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

/*
 * Get CPSR
 */
Inline UINT getCPSR( void )
{
	UINT	cpsr;
	Asm("mrs %0, cpsr": "=r"(cpsr));
	return cpsr;
}

/*
 * TLB disable
 */
Inline void PurgeTLB( void )
{
	Asm("mcr p15, 0, %0, cr8, c7, 0":: "r"(0));
}

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

/*
 * Monitor use vector number
 */
#define	VECNO_DEFAULT	EIT_DEFAULT	/* Default handler */
#define	VECNO_BREAK	EIT_UNDEF	/* Break point (Invalid instruction) */
#define	VECNO_MONITOR	( 4 )		/* Monitor service call */

#define	VECNO_FPGA	EIT_IRQ(10)	/* FPGA interrupt branch process */
#define	VECNO_CPLD	EIT_IRQ(11)	/* CPLD interrupt branch process */
#define	VECNO_POWERSW	EIT_FPGA2(0)	/* Power switch */
#define	VECNO_ABORTSW	EIT_FPGA2(2)	/* Abort switch */

/*
 * For saving monitor exception handler
 */
typedef struct monhdr {
	FP	default_hdr;		/* Default handler */
	FP	break_hdr;		/* Break point (Invalid instruction) */
	FP	monitor_hdr;		/* Monitor service call */

	FP	fpga_hdr;		/* FPGA interrupt branch process */
	FP	cpld_hdr;		/* CPLD interrupt branch process */
	FP	powersw_hdr;		/* Power switch */
	FP	abortsw_hdr;		/* Abort switch */
} 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
 */
Inline BOOL isTaskIndependent( void )
{
	return ( SCInfo.taskindp > 0 )? TRUE: FALSE;
}

/*
 * Move to/Restore task independent part
 */
Inline void EnterTaskIndependent( void )
{
	SCInfo.taskindp++;
}
Inline void LeaveTaskIndependent( void )
{
	SCInfo.taskindp--;
}

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

#endif /* _CPU_INSN_ */