[unix-history] / usr / src / sys / sparc / include / trap.h

/*
 * 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
 *
 * from: $Header: trap.h,v 1.9 92/11/26 02:04:47 torek Exp $
 */

#ifndef	_MACHINE_TRAP_H
#define	_MACHINE_TRAP_H
/*
 *
 * The SPARC has a Trap Base Register (TBR) which holds the upper 20 bits
 * of the trap vector table.  The next eight bits are supplied by the
 * hardware when the trap occurs, and the bottom four bits are always
 * zero (so that we can shove up to 16 bytes of executable code---exactly
 * four instructions---into each trap vector).
 *
 * The hardware allocates half the trap vectors to hardware and half to
 * software.
 *
 * Traps have priorities assigned (lower number => higher priority).
 */

#if defined(KERNEL) && !defined(LOCORE)
struct trapvec {
	int	tv_instr[4];		/* the four instructions */
};
extern struct trapvec trapbase[256];	/* the 256 vectors */
#endif

/*	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 */
/*			0x25	   unused */
/*	through		0x27	   unused */
#define	T_CPEXCEPTION	0x28	/* (9) coprocessor exception */
/*			0x29	   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_KGDB_EXEC	0x88	/* for kernel gdb */
#define	T_BSD_SYSCALL	0x89	/* BSD system call */

/* 0x8a..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) */

/*
 * `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_BSD_SYSCALL & 0x7f)

#endif /* _MACHINE_TRAP_H_ */
Commit	Line	Data
bdc5e0ad	1	/*
ad787160 C	2	* Copyright (c) 1992, 1993
ad787160 C	3	* The Regents of the University of California. All rights reserved.
bdc5e0ad CT	4	*
	5	* This software was developed by the Computer Systems Engineering group
	6	* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
	7	* contributed to Berkeley.
	8	*
b480239a KB	9	* All advertising materials mentioning features or use of this software
	10	* must display the following acknowledgement:
	11	* This product includes software developed by the University of
1869bdc0	12	* California, Lawrence Berkeley Laboratory.
b480239a	13	*
ad787160 C	14	* Redistribution and use in source and binary forms, with or without
	15	* modification, are permitted provided that the following conditions
	16	* are met:
	17	* 1. Redistributions of source code must retain the above copyright
	18	* notice, this list of conditions and the following disclaimer.
	19	* 2. Redistributions in binary form must reproduce the above copyright
	20	* notice, this list of conditions and the following disclaimer in the
	21	* documentation and/or other materials provided with the distribution.
	22	* 3. All advertising materials mentioning features or use of this software
	23	* must display the following acknowledgement:
	24	* This product includes software developed by the University of
	25	* California, Berkeley and its contributors.
	26	* 4. Neither the name of the University nor the names of its contributors
	27	* may be used to endorse or promote products derived from this software
	28	* without specific prior written permission.
	29	*
	30	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	31	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	32	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	33	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	34	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	35	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	36	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	37	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	38	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	39	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	40	* SUCH DAMAGE.
bdc5e0ad	41	*
ad787160	42	* @(#)trap.h 8.1 (Berkeley) 6/11/93
bdc5e0ad	43	*
1869bdc0	44	* from: $Header: trap.h,v 1.9 92/11/26 02:04:47 torek Exp $
bdc5e0ad CT	45	*/
	46
	47	#ifndef _MACHINE_TRAP_H
	48	#define _MACHINE_TRAP_H
	49	/*
	50	*
	51	* The SPARC has a Trap Base Register (TBR) which holds the upper 20 bits
	52	* of the trap vector table. The next eight bits are supplied by the
	53	* hardware when the trap occurs, and the bottom four bits are always
	54	* zero (so that we can shove up to 16 bytes of executable code---exactly
	55	* four instructions---into each trap vector).
	56	*
	57	* The hardware allocates half the trap vectors to hardware and half to
	58	* software.
	59	*
	60	* Traps have priorities assigned (lower number => higher priority).
	61	*/
	62
	63	#if defined(KERNEL) && !defined(LOCORE)
	64	struct trapvec {
	65	int tv_instr[4]; /* the four instructions */
	66	};
	67	extern struct trapvec trapbase[256]; /* the 256 vectors */
	68	#endif
	69
	70	/* trap vec (pri) description */
	71	#define T_RESET 0x00 /* (1) not actually vectored; jumps to 0 */
	72	#define T_TEXTFAULT 0x01 /* (2) address fault during instr fetch */
	73	#define T_ILLINST 0x02 /* (3) illegal instruction */
	74	#define T_PRIVINST 0x03 /* (4) privileged instruction */
	75	#define T_FPDISABLED 0x04 /* (5) fp instr while fp disabled */
	76	#define T_WINOF 0x05 /* (6) register window overflow */
	77	#define T_WINUF 0x06 /* (7) register window underflow */
	78	#define T_ALIGN 0x07 /* (8) address not properly aligned */
	79	#define T_FPE 0x08 /* (9) floating point exception */
	80	#define T_DATAFAULT 0x09 /* (10) address fault during data fetch */
	81	#define T_TAGOF 0x0a /* (11) tag overflow */
	82	/* 0x0b unused */
	83	/* 0x0c unused */
	84	/* 0x0d unused */
	85	/* 0x0e unused */
	86	/* 0x0f unused */
	87	/* 0x10 unused */
	88	#define T_L1INT 0x11 /* (27) level 1 interrupt */
	89	#define T_L2INT 0x12 /* (26) level 2 interrupt */
	90	#define T_L3INT 0x13 /* (25) level 3 interrupt */
	91	#define T_L4INT 0x14 /* (24) level 4 interrupt */
	92	#define T_L5INT 0x15 /* (23) level 5 interrupt */
	93	#define T_L6INT 0x16 /* (22) level 6 interrupt */
	94	#define T_L7INT 0x17 /* (21) level 7 interrupt */
	95	#define T_L8INT 0x18 /* (20) level 8 interrupt */
	96	#define T_L9INT 0x19 /* (19) level 9 interrupt */
	97	#define T_L10INT 0x1a /* (18) level 10 interrupt */
	98	#define T_L11INT 0x1b /* (17) level 11 interrupt */
	99	#define T_L12INT 0x1c /* (16) level 12 interrupt */
	100	#define T_L13INT 0x1d /* (15) level 13 interrupt */
	101	#define T_L14INT 0x1e /* (14) level 14 interrupt */
	102	#define T_L15INT 0x1f /* (13) level 15 interrupt */
	103	/* 0x20 unused */
	104	/* through 0x23 unused */
	105	#define T_CPDISABLED 0x24 /* (5) coprocessor instr while disabled */
	106	/* 0x25 unused */
	107	/* through 0x27 unused */
	108	#define T_CPEXCEPTION 0x28 /* (9) coprocessor exception */
109	/* 0x29 unused */
110	/* through 0x7f unused */
111
112	/* beginning of `user' vectors (from trap instructions) - all priority 12 */
113	#define T_SUN_SYSCALL 0x80 /* system call */
114	#define T_BREAKPOINT 0x81 /* breakpoint `instruction' */
115	#define T_DIV0 0x82 /* division routine was handed 0 */
116	#define T_FLUSHWIN 0x83 /* flush windows */
117	#define T_CLEANWIN 0x84 /* provide clean windows */
118	#define T_RANGECHECK 0x85 /* ? */
119	#define T_FIXALIGN 0x86 /* fix up unaligned accesses */
120	#define T_INTOF 0x87 /* integer overflow ? */
121	#define T_KGDB_EXEC 0x88 /* for kernel gdb */
122	#define T_BSD_SYSCALL 0x89 /* BSD system call */
123
124	/* 0x8a..0xff are currently unallocated */
125
126	#ifdef KERNEL /* pseudo traps for locore.s */
127	#define T_RWRET -1 /* need first user window for trap return */
128	#define T_AST -2 /* no-op, just needed reschedule or profile */
129	#endif
130
131	/* flags to system call (flags in %g1 along with syscall number) */
132	#define SYSCALL_G2RFLAG 0x400 /* on success, return to %g2 rather than npc */
133	#define SYSCALL_G7RFLAG 0x800 /* use %g7 as above (deprecated) */
134
135	/*
136	* `software trap' macros to keep people happy (sparc v8 manual says not
137	* to set the upper bits).
138	*/
139	#define ST_BREAKPOINT (T_BREAKPOINT & 0x7f)
140	#define ST_DIV0 (T_DIV0 & 0x7f)
141	#define ST_FLUSHWIN (T_FLUSHWIN & 0x7f)
142	#define ST_SYSCALL (T_BSD_SYSCALL & 0x7f)
143
144	#endif /* _MACHINE_TRAP_H_ */