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trap.h

/*    $NetBSD: trap.h,v 1.11 1999/01/20 00:15:08 pk Exp $ */

/*
 * Copyright (c) 1992, 1993
 *    The Regents of the University of California.  All rights reserved.
 *
 * This software was developed by the Computer Systems Engineering group
 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
 * contributed to Berkeley.
 *
 * 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, Lawrence Berkeley Laboratory.
 *
 * 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.
 *
 *    @(#)trap.h  8.1 (Berkeley) 6/11/93
 */
/*
 * Sun4m support by Aaron Brown, Harvard University.
 * Changes Copyright (c) 1995 The President and Fellows of Harvard College.
 * All rights reserved.
 */

#ifndef     _MACHINE_TRAP_H
#define     _MACHINE_TRAP_H

/*    trap        vec     (pri) description     */
#define     T_RESET           0x00  /* (1) not actually vectored; jumps to 0 */
#define     T_TEXTFAULT 0x01  /* (2) address fault during instr fetch */
#define     T_ILLINST   0x02  /* (3) illegal instruction */
#define     T_PRIVINST  0x03  /* (4) privileged instruction */
#define     T_FPDISABLED      0x04  /* (5) fp instr while fp disabled */
#define     T_WINOF           0x05  /* (6) register window overflow */
#define     T_WINUF           0x06  /* (7) register window underflow */
#define     T_ALIGN           0x07  /* (8) address not properly aligned */
#define     T_FPE       0x08  /* (9) floating point exception */
#define     T_DATAFAULT 0x09  /* (10) address fault during data fetch */
#define     T_TAGOF           0x0a  /* (11) tag overflow */
/*                0x0b     unused */
/*                0x0c     unused */
/*                0x0d     unused */
/*                0x0e     unused */
/*                0x0f     unused */
/*                0x10     unused */
#define     T_L1INT           0x11  /* (27) level 1 interrupt */
#define     T_L2INT           0x12  /* (26) level 2 interrupt */
#define     T_L3INT           0x13  /* (25) level 3 interrupt */
#define     T_L4INT           0x14  /* (24) level 4 interrupt */
#define     T_L5INT           0x15  /* (23) level 5 interrupt */
#define     T_L6INT           0x16  /* (22) level 6 interrupt */
#define     T_L7INT           0x17  /* (21) level 7 interrupt */
#define     T_L8INT           0x18  /* (20) level 8 interrupt */
#define     T_L9INT           0x19  /* (19) level 9 interrupt */
#define     T_L10INT    0x1a  /* (18) level 10 interrupt */
#define     T_L11INT    0x1b  /* (17) level 11 interrupt */
#define     T_L12INT    0x1c  /* (16) level 12 interrupt */
#define     T_L13INT    0x1d  /* (15) level 13 interrupt */
#define     T_L14INT    0x1e  /* (14) level 14 interrupt */
#define     T_L15INT    0x1f  /* (13) level 15 interrupt */
/*                0x20     unused */
/*    through           0x23     unused */
#define     T_CPDISABLED      0x24  /* (5) coprocessor instr while disabled */
#define     T_UNIMPLFLUSH     0x25  /* Unimplemented FLUSH */
/*    through           0x27     unused */
#define     T_CPEXCEPTION     0x28  /* (9) coprocessor exception */
/*                0x29     unused */
#define T_IDIV0         0x2a  /* divide by zero (from hw [su]div instr) */
#define T_STOREBUFFAULT 0x2b  /* SuperSPARC: Store buffer copy-back fault */
/*                0x2c     unused */
/*    through           0x7f     unused */

/* beginning of `user' vectors (from trap instructions) - all priority 12 */
#define     T_SUN_SYSCALL     0x80  /* system call */
#define     T_BREAKPOINT      0x81  /* breakpoint `instruction' */
#define     T_DIV0            0x82  /* division routine was handed 0 */
#define     T_FLUSHWIN  0x83  /* flush windows */
#define     T_CLEANWIN  0x84  /* provide clean windows */
#define     T_RANGECHECK      0x85  /* ? */
#define     T_FIXALIGN  0x86  /* fix up unaligned accesses */
#define     T_INTOF           0x87  /* integer overflow ? */
#define     T_SVR4_SYSCALL    0x88  /* SVR4 system call */
#define     T_BSD_SYSCALL     0x89  /* BSD system call */
#define     T_KGDB_EXEC 0x8a  /* for kernel gdb */

/* 0x8b..0xff are currently unallocated, except the following */
#define T_SVR4_GETCC          0xa0
#define T_SVR4_SETCC          0xa1
#define T_SVR4_GETPSR         0xa2
#define T_SVR4_SETPSR         0xa3
#define T_SVR4_GETHRTIME      0xa4
#define T_SVR4_GETHRVTIME     0xa5
#define T_SVR4_GETHRESTIME    0xa7


#ifdef _KERNEL                /* pseudo traps for locore.s */
#define     T_RWRET           -1    /* need first user window for trap return */
#define     T_AST       -2    /* no-op, just needed reschedule or profile */
#endif

/* flags to system call (flags in %g1 along with syscall number) */
#define     SYSCALL_G2RFLAG   0x400 /* on success, return to %g2 rather than npc */
#define     SYSCALL_G7RFLAG   0x800 /* use %g7 as above (deprecated) */

/*
 * `software trap' macros to keep people happy (sparc v8 manual says not
 * to set the upper bits).
 */
#define     ST_BREAKPOINT     (T_BREAKPOINT & 0x7f)
#define     ST_DIV0           (T_DIV0 & 0x7f)
#define     ST_FLUSHWIN (T_FLUSHWIN & 0x7f)
#define     ST_SYSCALL  (T_SUN_SYSCALL & 0x7f)

#endif /* _MACHINE_TRAP_H_ */

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