153 lines
4.5 KiB
C
153 lines
4.5 KiB
C
/* Simulator header for Cpu tools GENerated simulators.
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Copyright (C) 1996, 1997 Free Software Foundation, Inc.
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Contributed by Cygnus Support.
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This file is part of GDB, the GNU debugger.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#ifndef CGEN_SIM_H
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#define CGEN_SIM_H
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#define PC (STATE_CPU_CPU (current_state, 0)->pc)
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/* Execution state. */
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enum exec_state {
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EXEC_STATE_RUNNING, EXEC_STATE_EXITED,
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EXEC_STATE_STOPPED, EXEC_STATE_SIGNALLED
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};
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/* Signals we use. */
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enum sim_signal_type {
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SIM_SIGNONE,
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SIM_SIGILL, /* illegal insn */
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SIM_SIGTRAP,
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SIM_SIGALIGN, /* misaligned memory access */
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SIM_SIGACCESS, /* tried to read/write memory that's not readable/writable */
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SIM_SIGXCPU /* cpu limit exceeded */
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};
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void engine_halt PARAMS ((struct _sim_cpu *, enum exec_state, int));
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void engine_signal PARAMS ((struct _sim_cpu *, enum sim_signal_type));
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/* Instruction field support macros. */
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#define EXTRACT_SIGNED(val, total, start, length) \
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(((((val) >> ((total) - ((start) + (length)))) & ((1 << (length)) - 1)) \
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^ (1 << ((length) - 1))) \
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- (1 << ((length) - 1)))
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#define EXTRACT_UNSIGNED(val, total, start, length) \
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(((val) >> ((total) - ((start) + (length)))) & ((1 << (length)) - 1))
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/* Compute number of longs required to hold N bits. */
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#define HOST_LONGS_FOR_BITS(n) \
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(((n) + sizeof (long) * 8 - 1) / sizeof (long) * 8)
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/* Decode,extract,semantics. */
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typedef void (EXTRACT_FN) PARAMS ((SIM_CPU *, PCADDR, insn_t, struct argbuf *));
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/*typedef CIA (SEMANTIC_FN) PARAMS ((SEM_ARG));*/
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typedef PCADDR (SEMANTIC_FN) PARAMS ((SIM_CPU *, struct argbuf *));
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#if 0 /* wip */
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typedef void (EXTRACT_CACHE_FN) PARAMS ((SIM_CPU *, PCADDR, insn_t, struct argbuf *));
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#endif
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typedef PCADDR (SEMANTIC_CACHE_FN) PARAMS ((SIM_CPU *, struct scache *));
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typedef struct {
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/* Using cgen_insn_type requires <cpu>-opc.h. */
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int /*enum cgen_insn_type*/ insn_type;
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const struct cgen_insn *opcode;
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/* FIXME: Perhaps rename these to normal/fast versions to associate them
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with the normal/fast args to genmloop.sh. */
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EXTRACT_FN *extract;
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SEMANTIC_FN *semantic;
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#if 0 /* wip */
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EXTRACT_CACHE_FN *extract_fast;
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#endif
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SEMANTIC_CACHE_FN *semantic_fast;
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#if defined (USE_SEM_SWITCH) && defined (__GNUC__)
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void *semantic_lab;
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#endif
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} DECODE;
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/* FIXME: length parm to decode() is currently unneeded. */
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extern DECODE *decode PARAMS ((insn_t /*, int*/));
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/* Simulator state. */
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#if WITH_SCACHE
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#include "cgen-scache.h"
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#endif
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/* ??? Do we *need* to pass state to the semantic routines? */
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extern SIM_DESC current_state;
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/* FIXME: Until sim_open creates one. */
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extern struct sim_state sim_global_state;
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/* Simulator state. */
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/* Main state struct.
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CGEN_STATE contains addition state information not present in
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sim_state_base. */
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typedef struct cgen_state {
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/* argv, env */
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char **argv;
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#define STATE_ARGV(s) ((s)->cgen_state.argv)
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char **envp;
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#define STATE_ENVP(s) ((s)->cgen_state.envp)
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} CGEN_STATE;
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/* Additional per-cpu data. */
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typedef struct {
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/* Simulator's execution cache. */
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#if WITH_SCACHE
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CPU_SCACHE scache;
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#endif /* WITH_SCACHE */
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enum exec_state exec_state;
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#define CPU_EXEC_STATE(cpu) ((cpu)->cgen_cpu.exec_state)
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int halt_sigrc;
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#define CPU_HALT_SIGRC(cpu) ((cpu)->cgen_cpu.halt_sigrc)
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jmp_buf halt_jmp_buf;
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#define CPU_HALT_JMP_BUF(cpu) ((cpu)->cgen_cpu.halt_jmp_buf)
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CPU_DATA cpu;
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#define CPU_CPU(c) (& (c)->cgen_cpu.cpu)
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CPU_PROFILE profile_state;
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#define CPU_PROFILE_STATE(cpu) (& (cpu)->cgen_cpu.profile_state)
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} CGEN_CPU;
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/* Various utilities. */
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int engine_stop (SIM_DESC);
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void engine_run (SIM_DESC, int, int);
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void engine_resume (SIM_DESC, int, int);
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void engine_halt (SIM_CPU *, enum exec_state, int);
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void engine_signal (SIM_CPU *, enum sim_signal_type);
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int sim_signal_to_host (int);
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void
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sim_disassemble_insn (const struct cgen_insn *, const struct argbuf *,
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PCADDR, char *);
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#endif /* CGEN_SIM_H */
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