/*      $NetBSD: trap.h,v 1.20 2021/01/24 07:36:54 mrg 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. 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 */
#define T_TEXTERROR     0x21    /* (3) address fault during instr fetch */
/*                      0x22       unused */
/*                      0x23       unused */
#define T_CPDISABLED    0x24    /* (5) coprocessor instr while disabled */
#define T_UNIMPLFLUSH   0x25    /* Unimplemented FLUSH */
/*      through         0x27       unused */
#define T_CPEXCEPTION   0x28    /* (11) coprocessor exception */
#define T_DATAERROR     0x29    /* (12) address error during data fetch */
#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    /* explicitly signal division by zero */
#define T_FLUSHWIN      0x83    /* flush windows */
#define T_CLEANWIN      0x84    /* request new windows to be cleaned */
#define T_RANGECHECK    0x85    /* explicitly signal a range checking error */
#define T_FIXALIGN      0x86    /* fix up unaligned accesses */
#define T_INTOF         0x87    /* explicitly signal integer overflow */

/* 0x89..0x8f - reserved for the OS */
#define T_BSD_SYSCALL   0x89    /* BSD system call */
#define T_KGDB_EXEC     0x8a    /* for kernel gdb */
#define T_DBPAUSE       0x8b    /* for smp kernel debugging */

/* 0x90..0x9f - reserved, will never be specified */

/* 0xa0..0xff are currently unallocated */

#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) */
#define SYSCALL_G5RFLAG 0xc00   /* use %g5 as above (only ABI compatible way) */

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

#if defined(_KERNEL) && !defined(_LOCORE)
extern const char *trap_type[];
extern struct fpstate initfpstate;
#endif

#endif /* _MACHINE_TRAP_H_ */

You are viewing proxied material from ftp.icm.edu.pl. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.