sun3/include/cpu.h

/* Copyright (c) 1993 Adam Glass
 * Copyright (c) 1988 University of Utah.
 * Copyright (c) 1982, 1990 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 $Hdr: cpu.h 1.16 91/03/25$
 *
 *	from: @(#)cpu.h	7.7 (Berkeley) 6/27/91
 *	cpu.h,v 1.2 1993/05/22 07:58:17 cgd Exp
 */

/*
 * Exported definitions unique to sun3/68k cpu support.
 */

/*
 * definitions of cpu-dependent requirements
 * referenced in generic code
 */
#define	COPY_SIGCODE		/* copy sigcode above user stack in exec */

/*
 * function vs. inline configuration;
 * these are defined to get generic functions
 * rather than inline or machine-dependent implementations
 */
#define	NEED_MINMAX		/* need {,i,l,ul}{min,max} functions */
#define	NEED_FFS		/* don't need ffs function */
#define	NEED_BCMP		/* don't need bcmp function */
#define	NEED_STRLEN		/* don't need strlen function */

#define	cpu_exec(p)	/* nothing */
#define	cpu_wait(p)	/* nothing */

/*
 * Arguments to hardclock, softclock and gatherstats
 * encapsulate the previous machine state in an opaque
 * clockframe; for hp300, use just what the hardware
 * leaves on the stack.
 */
typedef struct intrframe {
	int	pc;
	int	ps;
} clockframe;

#define	CLKF_USERMODE(framep)	(((framep)->ps & PSL_S) == 0)
#define	CLKF_BASEPRI(framep)	(((framep)->ps & PSL_IPL7) == 0)
#define	CLKF_PC(framep)		((framep)->pc)

/*
 * 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 from the softclock
 * interrupt.  On hp300, request an ast to send us through trap(),
 * marking the proc as needing a profiling tick.
 */
#define	profile_tick(p, framep)	{ (p)->p_flag |= SOWEUPC; 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 */


/*
 * The rest of this should probably be moved to ../hp300/hp300cpu.h,
 * although some of it could probably be put into generic 68k headers.
 */

/* values for machineid */

#define CPU_ARCH_MASK  0xf0
#define SUN3_ARCH      0x10
#define SUN3_IMPL_MASK 0x0f
#define SUN3_MACH_160  0x01
#define SUN3_MACH_50   0x02
#define SUN3_MACH_260  0x03
#define SUN3_MACH_110  0x04
#define SUN3_MACH_60   0x07
#define SUN3_MACH_E    0x08

#ifdef KERNEL
extern	int machineid, mmutype, ectype;
extern	char *intiobase, *intiolimit;

/* what is this supposed to do? i.e. how is it different than startrtclock? */
#define	enablertclock()

#endif

/* 680X0 function codes */
#define	FC_USERD	1	/* user data space */
#define	FC_USERP	2	/* user program space */
#define	FC_CONTROL	3	/* HPMMU: clear TLB entries */
#define	FC_SUPERD	5	/* supervisor data space */
#define	FC_SUPERP	6	/* supervisor program space */
#define	FC_CPU		7	/* CPU space */

/* fields in the 68020 cache control register */
#define	IC_ENABLE	0x0001	/* enable instruction cache */
#define	IC_FREEZE	0x0002	/* freeze instruction cache */
#define	IC_CE		0x0004	/* clear instruction cache entry */
#define	IC_CLR		0x0008	/* clear entire instruction cache */