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cpu.h revision 1.3 
      1 /*-
      2  * Copyright (c) 1992 The Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * This code is derived from software contributed to Berkeley by
      6  * Ralph Campbell and Rick Macklem.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the University of
     19  *	California, Berkeley and its contributors.
     20  * 4. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  * from: @(#)cpu.h	7.7 (Berkeley) 11/15/92
     37  * $Id: cpu.h,v 1.3 1994/01/14 04:53:37 deraadt Exp $
     38  */
     39 
     40 #ifndef _CPU_H_
     41 #define _CPU_H_
     42 
     43 #include <machine/machConst.h>
     44 
     45 /*
     46  * Exported definitions unique to pmax/mips cpu support.
     47  */
     48 
     49 /*
     50  * definitions of cpu-dependent requirements
     51  * referenced in generic code
     52  */
     53 #define	COPY_SIGCODE		/* copy sigcode above user stack in exec */
     54 
     55 #define	cpu_exec(p)	(p->p_md.md_ss_addr = 0) /* init single step */
     56 #define	cpu_wait(p)	/* nothing */
     57 #define cpu_setstack(p, ap) \
     58 	(p)->p_md.md_regs[SP] = ap
     59 
     60 /*
     61  * Arguments to hardclock and gatherstats encapsulate the previous
     62  * machine state in an opaque clockframe.
     63  */
     64 typedef struct intrframe {
     65 	int	pc;	/* program counter at time of interrupt */
     66 	int	sr;	/* status register at time of interrupt */
     67 } clockframe;
     68 
     69 #define	CLKF_USERMODE(framep)	((framep)->sr & MACH_SR_KU_PREV)
     70 #define	CLKF_BASEPRI(framep)	\
     71 	((~(framep)->sr & (MACH_INT_MASK | MACH_SR_INT_ENA_PREV)) == 0)
     72 #define	CLKF_PC(framep)		((framep)->pc)
     73 #define	CLKF_INTR(framep)	(0)
     74 
     75 /*
     76  * Preempt the current process if in interrupt from user mode,
     77  * or after the current trap/syscall if in system mode.
     78  */
     79 #define	need_resched()	{ want_resched = 1; aston(); }
     80 
     81 /*
     82  * Give a profiling tick to the current process when the user profiling
     83  * buffer pages are invalid.  On the PMAX, request an ast to send us
     84  * through trap, marking the proc as needing a profiling tick.
     85  */
     86 #define	need_proftick(p)	{ (p)->p_flag |= SOWEUPC; aston(); }
     87 
     88 /*
     89  * Notify the current process (p) that it has a signal pending,
     90  * process as soon as possible.
     91  */
     92 #define	signotify(p)	aston()
     93 
     94 #define aston()		(astpending = 1)
     95 
     96 int	astpending;	/* need to trap before returning to user mode */
     97 int	want_resched;	/* resched() was called */
     98 
     99 /*
    100  * CPU identification, from PRID register.
    101  */
    102 union cpuprid {
    103 	int	cpuprid;
    104 	struct {
    105 #if BYTE_ORDER == BIG_ENDIAN
    106 		u_int	pad1:16;	/* reserved */
    107 		u_int	cp_imp:8;	/* implementation identifier */
    108 		u_int	cp_majrev:4;	/* major revision identifier */
    109 		u_int	cp_minrev:4;	/* minor revision identifier */
    110 #else
    111 		u_int	cp_minrev:4;	/* minor revision identifier */
    112 		u_int	cp_majrev:4;	/* major revision identifier */
    113 		u_int	cp_imp:8;	/* implementation identifier */
    114 		u_int	pad1:16;	/* reserved */
    115 #endif
    116 	} cpu;
    117 };
    118 
    119 /*
    120  * MIPS CPU types (cp_imp).
    121  */
    122 #define	MIPS_R2000	0x01
    123 #define	MIPS_R3000	0x02
    124 #define	MIPS_R6000	0x03
    125 #define	MIPS_R4000	0x04
    126 #define	MIPS_R6000A	0x06
    127 
    128 /*
    129  * MIPS FPU types
    130  */
    131 #define	MIPS_R2010	0x02
    132 #define	MIPS_R3010	0x03
    133 #define	MIPS_R6010	0x04
    134 #define	MIPS_R4010	0x05
    135 
    136 #ifdef KERNEL
    137 union	cpuprid cpu;
    138 union	cpuprid fpu;
    139 u_int	machDataCacheSize;
    140 u_int	machInstCacheSize;
    141 extern	struct intr_tab intr_tab[];
    142 #endif
    143 
    144 /*
    145  * Enable realtime clock (always enabled).
    146  */
    147 #define	enablertclock()
    148 
    149 #endif /* _CPU_H_ */
    150