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/* CPU support.
Copyright (C) 1998-2021 Free Software Foundation, Inc.
Contributed by Cygnus Solutions.
This file is part of GDB, the GNU debugger.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* This file is intended to be included by sim-base.h.
This file provides an interface between the simulator framework and
the selected cpu. */
#ifndef SIM_CPU_H
#define SIM_CPU_H
/* Type of function to return an insn name. */
typedef const char * (CPU_INSN_NAME_FN) (sim_cpu *, int);
/* Types for register access functions.
These routines implement the sim_{fetch,store}_register interface. */
typedef int (CPUREG_FETCH_FN) (sim_cpu *, int, unsigned char *, int);
typedef int (CPUREG_STORE_FN) (sim_cpu *, int, unsigned char *, int);
/* Types for PC access functions.
Some simulators require a functional interface to access the program
counter [a macro is insufficient as the PC is kept in a cpu-specific part
of the sim_cpu struct]. */
typedef sim_cia (PC_FETCH_FN) (sim_cpu *);
typedef void (PC_STORE_FN) (sim_cpu *, sim_cia);
/* Pseudo baseclass for each cpu. */
typedef struct {
/* Backlink to main state struct. */
SIM_DESC state;
#define CPU_STATE(cpu) ((cpu)->base.state)
/* Processor index within the SD_DESC */
int index;
#define CPU_INDEX(cpu) ((cpu)->base.index)
/* The name of the cpu. */
const char *name;
#define CPU_NAME(cpu) ((cpu)->base.name)
/* Options specific to this cpu. */
struct option_list *options;
#define CPU_OPTIONS(cpu) ((cpu)->base.options)
/* Processor specific core data */
sim_cpu_core core;
#define CPU_CORE(cpu) (& (cpu)->base.core)
/* Number of instructions (used to iterate over CPU_INSN_NAME). */
unsigned int max_insns;
#define CPU_MAX_INSNS(cpu) ((cpu)->base.max_insns)
/* Function to return the name of an insn. */
CPU_INSN_NAME_FN *insn_name;
#define CPU_INSN_NAME(cpu) ((cpu)->base.insn_name)
/* Trace data. See sim-trace.h. */
TRACE_DATA trace_data;
#define CPU_TRACE_DATA(cpu) (& (cpu)->base.trace_data)
/* Maximum number of debuggable entities.
This debugging is not intended for normal use.
It is only enabled when the simulator is configured with --with-debug
which shouldn't normally be specified. */
#ifndef MAX_DEBUG_VALUES
#define MAX_DEBUG_VALUES 4
#endif
/* Boolean array of specified debugging flags. */
char debug_flags[MAX_DEBUG_VALUES];
#define CPU_DEBUG_FLAGS(cpu) ((cpu)->base.debug_flags)
/* Standard values. */
#define DEBUG_INSN_IDX 0
#define DEBUG_NEXT_IDX 2 /* simulator specific debug bits begin here */
/* Debugging output goes to this or stderr if NULL.
We can't store `stderr' here as stderr goes through a callback. */
FILE *debug_file;
#define CPU_DEBUG_FILE(cpu) ((cpu)->base.debug_file)
/* Profile data. See sim-profile.h. */
PROFILE_DATA profile_data;
#define CPU_PROFILE_DATA(cpu) (& (cpu)->base.profile_data)
/* Machine tables for this cpu. See sim-model.h. */
const SIM_MACH *mach;
#define CPU_MACH(cpu) ((cpu)->base.mach)
/* The selected model. */
const SIM_MODEL *model;
#define CPU_MODEL(cpu) ((cpu)->base.model)
/* Model data (profiling state, etc.). */
void *model_data;
#define CPU_MODEL_DATA(cpu) ((cpu)->base.model_data)
/* Routines to fetch/store registers. */
CPUREG_FETCH_FN *reg_fetch;
#define CPU_REG_FETCH(c) ((c)->base.reg_fetch)
CPUREG_STORE_FN *reg_store;
#define CPU_REG_STORE(c) ((c)->base.reg_store)
PC_FETCH_FN *pc_fetch;
#define CPU_PC_FETCH(c) ((c)->base.pc_fetch)
PC_STORE_FN *pc_store;
#define CPU_PC_STORE(c) ((c)->base.pc_store)
} sim_cpu_base;
/* Create all cpus. */
extern SIM_RC sim_cpu_alloc_all (SIM_DESC, int);
/* Create a cpu. */
extern sim_cpu *sim_cpu_alloc (SIM_DESC);
/* Release resources held by all cpus. */
extern void sim_cpu_free_all (SIM_DESC);
/* Release resources held by a cpu. */
extern void sim_cpu_free (sim_cpu *);
/* Return a pointer to the cpu data for CPU_NAME, or NULL if not found. */
extern sim_cpu *sim_cpu_lookup (SIM_DESC, const char *);
/* Return prefix to use in cpu specific messages. */
extern const char *sim_cpu_msg_prefix (sim_cpu *);
/* Cover fn to sim_io_eprintf. */
extern void sim_io_eprintf_cpu (sim_cpu *, const char *, ...);
/* Get/set a pc value. */
#define CPU_PC_GET(cpu) ((* CPU_PC_FETCH (cpu)) (cpu))
#define CPU_PC_SET(cpu,newval) ((* CPU_PC_STORE (cpu)) ((cpu), (newval)))
/* External interface to accessing the pc. */
sim_cia sim_pc_get (sim_cpu *);
void sim_pc_set (sim_cpu *, sim_cia);
#endif /* SIM_CPU_H */
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