text: /*	$NetBSD: cpu.h,v 1.6 1997/10/10 21:45:20 oki Exp $	*/
  
  /*
   * Copyright (c) 1988 University of Utah.
   * Copyright (c) 1982, 1990, 1993
   *	The Regents of the University of California.  All rights reserved.
   *
   * This code is derived from software contributed to Berkeley by
   * the Systems Programming Group of the University of Utah Computer
   * Science Department.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *	This product includes software developed by the University of
   *	California, Berkeley and its contributors.
   * 4. Neither the name of the University nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   * from: Utah $Hdr: cpu.h 1.16 91/03/25$
   *
   *	@(#)cpu.h	8.4 (Berkeley) 1/5/94
   */
  
  #ifndef _X68K_CPU_H_
  #define	_X68K_CPU_H_
  
  /*
   * Exported definitions unique to x68k/68k cpu support.
   */
  
  /*
   * Get common m68k CPU definitions.
   */
  #include <m68k/cpu.h>
  #define	M68K_MMU_MOTOROLA
  
  /*
   * definitions of cpu-dependent requirements
   * referenced in generic code
   */
  #define	cpu_swapin(p)			/* nothing */
  #define	cpu_wait(p)			/* nothing */
  #define	cpu_swapout(p)			/* nothing */
  
  /*
   * Arguments to hardclock and gatherstats encapsulate the previous
   * machine state in an opaque clockframe.  One the x68k, we use
   * what the hardware pushes on an interrupt (frame format 0).
   */
  struct clockframe {
  	u_short	sr;		/* sr at time of interrupt */
  	u_long	pc;		/* pc at time of interrupt */
  	u_short	vo;		/* vector offset (4-word frame) */
  };
  
  #define	CLKF_USERMODE(framep)	(((framep)->sr & PSL_S) == 0)
  #define	CLKF_BASEPRI(framep)	(((framep)->sr & PSL_IPL) == 0)
  #define	CLKF_PC(framep)		((framep)->pc)
  #if 0
  /* We would like to do it this way... */
  #define	CLKF_INTR(framep)	(((framep)->sr & PSL_M) == 0)
  #else
  /* but until we start using PSL_M, we have to do this instead */
  #define	CLKF_INTR(framep)	(0)	/* XXX */
  #endif
  
  
  /*
   * Preempt the current process if in interrupt from user mode,
   * or after the current trap/syscall if in system mode.
   */
  #define	need_resched()	{ want_resched++; aston(); }
  
  /*
   * Give a profiling tick to the current process when the user profiling
   * buffer pages are invalid.  On the x68k, request an ast to send us
   * through trap, marking the proc as needing a profiling tick.
   */
  #define	need_proftick(p)	{ (p)->p_flag |= P_OWEUPC; aston(); }
  
  /*
   * Notify the current process (p) that it has a signal pending,
   * process as soon as possible.
   */
  #define	signotify(p)	aston()
  
  #define aston() (astpending++)
  
  int	astpending;		/* need to trap before returning to user mode */
  int	want_resched;		/* resched() was called */
  
  
  /*
   * simulated software interrupt register
   */
  extern unsigned char ssir;
  
  #define SIR_NET		0x1
  #define SIR_CLOCK	0x2
  #define SIR_SERIAL	0x4
  #define SIR_KBD		0x8
  
  #define siroff(x)	ssir &= ~(x)
  #define setsoftnet()	ssir |= SIR_NET
  #define setsoftclock()	ssir |= SIR_CLOCK
  #define setsoftserial() ssir |= SIR_SERIAL
  #define setsoftkbd()    ssir |= SIR_KBD
  
  /*
   * CTL_MACHDEP definitions.
   */
  #define	CPU_CONSDEV		1	/* dev_t: console terminal device */
  #define	CPU_MAXID		2	/* number of valid machdep ids */
  
  #define CTL_MACHDEP_NAMES { \
  	{ 0, 0 }, \
  	{ "console_device", CTLTYPE_STRUCT }, \
  }
  
  /*
   * The rest of this should probably be moved to ../x68k/x68kcpu.h,
   * although some of it could probably be put into generic 68k headers.
   */
  
  /* values for cpuspeed (not really related to clock speed due to caches) */
  #define	MHZ_8		1
  #define	MHZ_16		2
  #define	MHZ_25		3
  #define	MHZ_33		4
  #define	MHZ_50		6
  
  #ifdef _KERNEL
  extern int machineid;
  extern char *intiolimit;
  
  /* autoconf.c functions */
  void	configure __P((void));
  void	config_console __P((void));
  
  /* fpu.c functions */
  int	fpu_probe __P((void));
  
  /* machdep.c functions */
  void	dumpconf __P((void));
  void	dumpsys __P((void));
  
  /* locore.s functions */
  struct pcb;
  struct fpframe;
  void	savectx __P((struct pcb *));
  void	switch_exit __P((struct proc *));
  void	proc_trampoline __P((void));
  u_long	getdfc __P((void));
  u_long	getsfc __P((void));
  void	loadustp __P((int));
  void	m68881_save __P((struct fpframe *));
  void	m68881_restore __P((struct fpframe *));
  void	DCIS __P((void));
  void	DCIU __P((void));
  void	ICIA __P((void));
  void	ICPA __P((void));
  void	PCIA __P((void));
  void	TBIA __P((void));
  void	TBIS __P((vm_offset_t));
  void	TBIAS __P((void));
  void	TBIAU __P((void));
  #if defined(M68040) || defined(M68060)
  void	DCFA __P((void));
  void	DCFP __P((vm_offset_t));
  void	DCFL __P((vm_offset_t));
  void	DCPL __P((vm_offset_t));
  void	DCPP __P((vm_offset_t));
  void	ICPL __P((vm_offset_t));
  void	ICPP __P((vm_offset_t));
  #endif
  
  /* sys_machdep.c functions */
  int	cachectl __P((int, caddr_t, int));
  int	dma_cachectl __P((caddr_t, int));
  
  /* vm_machdep.c functions */
  void	physaccess __P((caddr_t, caddr_t, int, int));
  void	physunaccess __P((caddr_t, int));
  int	kvtop __P((caddr_t));
  
  #endif
  
  /* physical memory sections */
  #define INTIOBASE	(0x00C00000)
  #define INTIOTOP	(0x01000000)
  
  /*
   * Internal IO space:
   *
   * Ranges from 0xC00000 to 0x1000000 (IIOMAPSIZE).
   *
   * Internal IO space is mapped in the kernel from ``IODEVbase'' to
   * ``intiolimit'' (defined in locore.s).  Since it is always mapped,
   * conversion between physical and kernel virtual addresses is easy.
   */
  #define	IIOPOFF(pa)	((int)(pa)-INTIOBASE)
  #define	IIOMAPSIZE	btoc(INTIOTOP-INTIOBASE)	/* 4mb */
  
  #endif /* _X68K_CPU_H_ */
  