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cpu.h revision 1.10 
      1 /*	$NetBSD: cpu.h,v 1.10 1995/04/22 20:27:59 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1992, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This code is derived from software contributed to Berkeley by
      8  * Ralph Campbell and Rick Macklem.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the University of
     21  *	California, Berkeley and its contributors.
     22  * 4. Neither the name of the University nor the names of its contributors
     23  *    may be used to endorse or promote products derived from this software
     24  *    without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     36  * SUCH DAMAGE.
     37  *
     38  *	@(#)cpu.h	8.4 (Berkeley) 1/4/94
     39  */
     40 
     41 #ifndef _CPU_H_
     42 #define _CPU_H_
     43 
     44 #include <machine/machConst.h>
     45 
     46 /*
     47  * Exported definitions unique to pmax/mips cpu support.
     48  */
     49 
     50 /*
     51  * definitions of cpu-dependent requirements
     52  * referenced in generic code
     53  */
     54 #define	cpu_exec(p)		(p->p_md.md_ss_addr = 0) /* init single step */
     55 #define	cpu_wait(p)		/* nothing */
     56 #define cpu_set_init_frame(p, fp) /* nothing */
     57 
     58 /*
     59  * Arguments to hardclock and gatherstats encapsulate the previous
     60  * machine state in an opaque clockframe.
     61  */
     62 struct clockframe {
     63 	int	pc;	/* program counter at time of interrupt */
     64 	int	sr;	/* status register at time of interrupt */
     65 };
     66 
     67 #define	CLKF_USERMODE(framep)	((framep)->sr & MACH_SR_KU_PREV)
     68 #define	CLKF_BASEPRI(framep)	\
     69 	((~(framep)->sr & (MACH_INT_MASK | MACH_SR_INT_ENA_PREV)) == 0)
     70 #define	CLKF_PC(framep)		((framep)->pc)
     71 #define	CLKF_INTR(framep)	(0)
     72 
     73 /*
     74  * Preempt the current process if in interrupt from user mode,
     75  * or after the current trap/syscall if in system mode.
     76  */
     77 #define	need_resched()	{ want_resched = 1; aston(); }
     78 
     79 /*
     80  * Give a profiling tick to the current process when the user profiling
     81  * buffer pages are invalid.  On the PMAX, request an ast to send us
     82  * through trap, marking the proc as needing a profiling tick.
     83  */
     84 #define	need_proftick(p)	{ (p)->p_flag |= P_OWEUPC; aston(); }
     85 
     86 /*
     87  * Notify the current process (p) that it has a signal pending,
     88  * process as soon as possible.
     89  */
     90 #define	signotify(p)	aston()
     91 
     92 #define aston()		(astpending = 1)
     93 
     94 int	astpending;	/* need to trap before returning to user mode */
     95 int	want_resched;	/* resched() was called */
     96 
     97 /*
     98  * CPU identification, from PRID register.
     99  */
    100 union cpuprid {
    101 	int	cpuprid;
    102 	struct {
    103 #if BYTE_ORDER == BIG_ENDIAN
    104 		u_int	pad1:16;	/* reserved */
    105 		u_int	cp_imp:8;	/* implementation identifier */
    106 		u_int	cp_majrev:4;	/* major revision identifier */
    107 		u_int	cp_minrev:4;	/* minor revision identifier */
    108 #else
    109 		u_int	cp_minrev:4;	/* minor revision identifier */
    110 		u_int	cp_majrev:4;	/* major revision identifier */
    111 		u_int	cp_imp:8;	/* implementation identifier */
    112 		u_int	pad1:16;	/* reserved */
    113 #endif
    114 	} cpu;
    115 };
    116 
    117 /*
    118  * CTL_MACHDEP definitions.
    119  */
    120 #define	CPU_CONSDEV		1	/* dev_t: console terminal device */
    121 #define	CPU_MAXID		2	/* number of valid machdep ids */
    122 
    123 #define CTL_MACHDEP_NAMES { \
    124 	{ 0, 0 }, \
    125 	{ "console_device", CTLTYPE_STRUCT }, \
    126 }
    127 
    128 /*
    129  * MIPS CPU types (cp_imp).
    130  */
    131 #define	MIPS_R2000	0x01
    132 #define	MIPS_R3000	0x02
    133 #define	MIPS_R6000	0x03
    134 #define	MIPS_R4000	0x04
    135 #define	MIPS_R6000A	0x06
    136 
    137 /*
    138  * MIPS FPU types
    139  */
    140 #define	MIPS_R2010	0x02
    141 #define	MIPS_R3010	0x03
    142 #define	MIPS_R6010	0x04
    143 #define	MIPS_R4010	0x05
    144 
    145 #ifdef _KERNEL
    146 union	cpuprid cpu;
    147 union	cpuprid fpu;
    148 u_int	machDataCacheSize;
    149 u_int	machInstCacheSize;
    150 extern	struct intr_tab intr_tab[];
    151 #endif
    152 
    153 /*
    154  * Enable realtime clock (always enabled).
    155  */
    156 #define	enablertclock()
    157 
    158 #endif /* _CPU_H_ */
    159