146 lines
6.2 KiB
C
146 lines
6.2 KiB
C
/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratory.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)trap.h 8.1 (Berkeley) 6/11/93
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*
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* from: Header: trap.h,v 1.9 92/11/26 02:04:47 torek Exp
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* $Id: trap.h,v 1.2 1993/11/10 03:13:19 deraadt Exp $
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*/
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#ifndef _MACHINE_TRAP_H
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#define _MACHINE_TRAP_H
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/*
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*
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* The SPARC has a Trap Base Register (TBR) which holds the upper 20 bits
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* of the trap vector table. The next eight bits are supplied by the
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* hardware when the trap occurs, and the bottom four bits are always
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* zero (so that we can shove up to 16 bytes of executable code---exactly
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* four instructions---into each trap vector).
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*
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* The hardware allocates half the trap vectors to hardware and half to
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* software.
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*
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* Traps have priorities assigned (lower number => higher priority).
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*/
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#if defined(KERNEL) && !defined(LOCORE)
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struct trapvec {
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int tv_instr[4]; /* the four instructions */
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};
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extern struct trapvec trapbase[256]; /* the 256 vectors */
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#endif
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/* trap vec (pri) description */
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#define T_RESET 0x00 /* (1) not actually vectored; jumps to 0 */
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#define T_TEXTFAULT 0x01 /* (2) address fault during instr fetch */
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#define T_ILLINST 0x02 /* (3) illegal instruction */
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#define T_PRIVINST 0x03 /* (4) privileged instruction */
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#define T_FPDISABLED 0x04 /* (5) fp instr while fp disabled */
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#define T_WINOF 0x05 /* (6) register window overflow */
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#define T_WINUF 0x06 /* (7) register window underflow */
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#define T_ALIGN 0x07 /* (8) address not properly aligned */
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#define T_FPE 0x08 /* (9) floating point exception */
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#define T_DATAFAULT 0x09 /* (10) address fault during data fetch */
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#define T_TAGOF 0x0a /* (11) tag overflow */
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/* 0x0b unused */
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/* 0x0c unused */
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/* 0x0d unused */
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/* 0x0e unused */
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/* 0x0f unused */
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/* 0x10 unused */
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#define T_L1INT 0x11 /* (27) level 1 interrupt */
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#define T_L2INT 0x12 /* (26) level 2 interrupt */
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#define T_L3INT 0x13 /* (25) level 3 interrupt */
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#define T_L4INT 0x14 /* (24) level 4 interrupt */
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#define T_L5INT 0x15 /* (23) level 5 interrupt */
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#define T_L6INT 0x16 /* (22) level 6 interrupt */
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#define T_L7INT 0x17 /* (21) level 7 interrupt */
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#define T_L8INT 0x18 /* (20) level 8 interrupt */
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#define T_L9INT 0x19 /* (19) level 9 interrupt */
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#define T_L10INT 0x1a /* (18) level 10 interrupt */
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#define T_L11INT 0x1b /* (17) level 11 interrupt */
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#define T_L12INT 0x1c /* (16) level 12 interrupt */
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#define T_L13INT 0x1d /* (15) level 13 interrupt */
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#define T_L14INT 0x1e /* (14) level 14 interrupt */
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#define T_L15INT 0x1f /* (13) level 15 interrupt */
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/* 0x20 unused */
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/* through 0x23 unused */
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#define T_CPDISABLED 0x24 /* (5) coprocessor instr while disabled */
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/* 0x25 unused */
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/* through 0x27 unused */
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#define T_CPEXCEPTION 0x28 /* (9) coprocessor exception */
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/* 0x29 unused */
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/* through 0x7f unused */
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/* beginning of `user' vectors (from trap instructions) - all priority 12 */
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#define T_SUN_SYSCALL 0x80 /* system call */
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#define T_BREAKPOINT 0x81 /* breakpoint `instruction' */
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#define T_DIV0 0x82 /* division routine was handed 0 */
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#define T_FLUSHWIN 0x83 /* flush windows */
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#define T_CLEANWIN 0x84 /* provide clean windows */
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#define T_RANGECHECK 0x85 /* ? */
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#define T_FIXALIGN 0x86 /* fix up unaligned accesses */
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#define T_INTOF 0x87 /* integer overflow ? */
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#define T_KGDB_EXEC 0x88 /* for kernel gdb */
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#define T_BSD_SYSCALL 0x89 /* BSD system call */
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/* 0x8a..0xff are currently unallocated */
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#ifdef KERNEL /* pseudo traps for locore.s */
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#define T_RWRET -1 /* need first user window for trap return */
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#define T_AST -2 /* no-op, just needed reschedule or profile */
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#endif
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/* flags to system call (flags in %g1 along with syscall number) */
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#define SYSCALL_G2RFLAG 0x400 /* on success, return to %g2 rather than npc */
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#define SYSCALL_G7RFLAG 0x800 /* use %g7 as above (deprecated) */
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/*
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* `software trap' macros to keep people happy (sparc v8 manual says not
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* to set the upper bits).
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*/
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#define ST_BREAKPOINT (T_BREAKPOINT & 0x7f)
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#define ST_DIV0 (T_DIV0 & 0x7f)
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#define ST_FLUSHWIN (T_FLUSHWIN & 0x7f)
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#define ST_SYSCALL (T_SUN_SYSCALL & 0x7f)
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#endif /* _MACHINE_TRAP_H_ */
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