155127Storek /* 255127Storek * Copyright (c) 1992 The Regents of the University of California. 355127Storek * All rights reserved. 455127Storek * 555127Storek * This software was developed by the Computer Systems Engineering group 655127Storek * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 755127Storek * contributed to Berkeley. 855127Storek * 9*55501Sbostic * All advertising materials mentioning features or use of this software 10*55501Sbostic * must display the following acknowledgement: 11*55501Sbostic * This product includes software developed by the University of 12*55501Sbostic * California, Lawrence Berkeley Laboratories. 13*55501Sbostic * 1455127Storek * %sccs.include.redist.c% 1555127Storek * 16*55501Sbostic * @(#)trap.h 7.2 (Berkeley) 07/21/92 1755127Storek * 1855127Storek * from: $Header: trap.h,v 1.8 92/07/03 18:49:02 torek Exp $ 1955127Storek */ 2055127Storek 2155127Storek #ifndef _MACHINE_TRAP_H 2255127Storek #define _MACHINE_TRAP_H 2355127Storek /* 2455127Storek * 2555127Storek * The SPARC has a Trap Base Register (TBR) which holds the upper 20 bits 2655127Storek * of the trap vector table. The next eight bits are supplied by the 2755127Storek * hardware when the trap occurs, and the bottom four bits are always 2855127Storek * zero (so that we can shove up to 16 bytes of executable code---exactly 2955127Storek * four instructions---into each trap vector). 3055127Storek * 3155127Storek * The hardware allocates half the trap vectors to hardware and half to 3255127Storek * software. 3355127Storek * 3455127Storek * Traps have priorities assigned (lower number => higher priority). 3555127Storek */ 3655127Storek 3755127Storek #if defined(KERNEL) && !defined(LOCORE) 3855127Storek struct trapvec { 3955127Storek int tv_instr[4]; /* the four instructions */ 4055127Storek }; 4155127Storek extern struct trapvec trapbase[256]; /* the 256 vectors */ 4255127Storek #endif 4355127Storek 4455127Storek /* trap vec (pri) description */ 4555127Storek #define T_RESET 0x00 /* (1) not actually vectored; jumps to 0 */ 4655127Storek #define T_TEXTFAULT 0x01 /* (2) address fault during instr fetch */ 4755127Storek #define T_ILLINST 0x02 /* (3) illegal instruction */ 4855127Storek #define T_PRIVINST 0x03 /* (4) privileged instruction */ 4955127Storek #define T_FPDISABLED 0x04 /* (5) fp instr while fp disabled */ 5055127Storek #define T_WINOF 0x05 /* (6) register window overflow */ 5155127Storek #define T_WINUF 0x06 /* (7) register window underflow */ 5255127Storek #define T_ALIGN 0x07 /* (8) address not properly aligned */ 5355127Storek #define T_FPE 0x08 /* (9) floating point exception */ 5455127Storek #define T_DATAFAULT 0x09 /* (10) address fault during data fetch */ 5555127Storek #define T_TAGOF 0x0a /* (11) tag overflow */ 5655127Storek /* 0x0b unused */ 5755127Storek /* 0x0c unused */ 5855127Storek /* 0x0d unused */ 5955127Storek /* 0x0e unused */ 6055127Storek /* 0x0f unused */ 6155127Storek /* 0x10 unused */ 6255127Storek #define T_L1INT 0x11 /* (27) level 1 interrupt */ 6355127Storek #define T_L2INT 0x12 /* (26) level 2 interrupt */ 6455127Storek #define T_L3INT 0x13 /* (25) level 3 interrupt */ 6555127Storek #define T_L4INT 0x14 /* (24) level 4 interrupt */ 6655127Storek #define T_L5INT 0x15 /* (23) level 5 interrupt */ 6755127Storek #define T_L6INT 0x16 /* (22) level 6 interrupt */ 6855127Storek #define T_L7INT 0x17 /* (21) level 7 interrupt */ 6955127Storek #define T_L8INT 0x18 /* (20) level 8 interrupt */ 7055127Storek #define T_L9INT 0x19 /* (19) level 9 interrupt */ 7155127Storek #define T_L10INT 0x1a /* (18) level 10 interrupt */ 7255127Storek #define T_L11INT 0x1b /* (17) level 11 interrupt */ 7355127Storek #define T_L12INT 0x1c /* (16) level 12 interrupt */ 7455127Storek #define T_L13INT 0x1d /* (15) level 13 interrupt */ 7555127Storek #define T_L14INT 0x1e /* (14) level 14 interrupt */ 7655127Storek #define T_L15INT 0x1f /* (13) level 15 interrupt */ 7755127Storek /* 0x20 unused */ 7855127Storek /* through 0x23 unused */ 7955127Storek #define T_CPDISABLED 0x24 /* (5) coprocessor instr while disabled */ 8055127Storek /* 0x25 unused */ 8155127Storek /* through 0x27 unused */ 8255127Storek #define T_CPEXCEPTION 0x28 /* (9) coprocessor exception */ 8355127Storek /* 0x29 unused */ 8455127Storek /* through 0x7f unused */ 8555127Storek 8655127Storek /* beginning of `user' vectors (from trap instructions) - all priority 12 */ 8755127Storek #define T_SUN_SYSCALL 0x80 /* system call */ 8855127Storek #define T_BREAKPOINT 0x81 /* breakpoint `instruction' */ 8955127Storek #define T_DIV0 0x82 /* division routine was handed 0 */ 9055127Storek #define T_FLUSHWIN 0x83 /* flush windows */ 9155127Storek #define T_CLEANWIN 0x84 /* provide clean windows */ 9255127Storek #define T_RANGECHECK 0x85 /* ? */ 9355127Storek #define T_FIXALIGN 0x86 /* fix up unaligned accesses */ 9455127Storek #define T_INTOF 0x87 /* integer overflow ? */ 9555127Storek #define T_KGDB_EXEC 0x88 /* for kernel gdb */ 9655127Storek #define T_BSD_SYSCALL 0x89 /* BSD system call */ 9755127Storek 9855127Storek /* 0x8a..0xff are currently unallocated */ 9955127Storek 10055127Storek #ifdef KERNEL /* pseudo traps for locore.s */ 10155127Storek #define T_RWRET -1 /* need first user window for trap return */ 10255127Storek #define T_AST -2 /* no-op, just needed reschedule or profile */ 10355127Storek #endif 10455127Storek 10555127Storek /* flags to system call (flags in %g1 along with syscall number) */ 10655127Storek #define SYSCALL_G2RFLAG 0x400 /* on success, return to %g2 rather than npc */ 10755127Storek #define SYSCALL_G7RFLAG 0x800 /* use %g7 as above (deprecated) */ 10855127Storek 10955127Storek /* 11055127Storek * `software trap' macros to keep people happy (sparc v8 manual says not 11155127Storek * to set the upper bits). 11255127Storek */ 11355127Storek #define ST_BREAKPOINT (T_BREAKPOINT & 0x7f) 11455127Storek #define ST_DIV0 (T_DIV0 & 0x7f) 11555127Storek #define ST_FLUSHWIN (T_FLUSHWIN & 0x7f) 11655127Storek #define ST_SYSCALL (T_BSD_SYSCALL & 0x7f) 11755127Storek 11855127Storek #endif /* _MACHINE_TRAP_H_ */ 119