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155 lines
4.9 KiB
C
155 lines
4.9 KiB
C
/* Architecture, machine, and model support.
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Copyright (C) 1997-2017 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 3 of the License, or
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(at your option) 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
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* Nomenclature:
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architecture = one of sparc, mips, sh, etc.
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in the sparc architecture, mach = one of v6, v7, v8, sparclite, etc.
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in the v8 mach, model = one of supersparc, etc.
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To use the model framework, your arch needs to do a few things:
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(1) Call SIM_AC_OPTION_DEFAULT_MODEL() in configure.ac.
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(2) Define enum mach_attr in sim-main.h.
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(3) Define sim_machs array (and all the callbacks it uses).
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*/
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/* This file is intended to be included by sim-basics.h. */
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#ifndef SIM_MODEL_H
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#define SIM_MODEL_H
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/* Function unit and instruction timing support.
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??? This is obviously insufficiently general.
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It's useful but it needs elaborating upon. */
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typedef struct {
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unsigned char name; /* actually a UNIT_TYPE enum */
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unsigned char issue;
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unsigned char done;
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} UNIT;
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#ifndef MAX_UNITS
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#define MAX_UNITS 1
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#endif
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#ifndef WITH_DEFAULT_MODEL
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/* Just a stub for ports that do not define models. */
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enum mach_attr { _MACH_NONE };
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# define WITH_DEFAULT_MODEL NULL
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# define WITH_MODEL_P 0
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#else
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# define WITH_MODEL_P 1
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#endif
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typedef int (MODEL_FN) (sim_cpu *, void *);
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typedef struct {
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/* This is an integer that identifies this insn.
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How this works is up to the target. */
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int num;
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/* Function to handle insn-specific profiling. */
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MODEL_FN *model_fn;
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/* Array of function units used by this insn. */
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UNIT units[MAX_UNITS];
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} INSN_TIMING;
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/* Struct to describe various implementation properties of a cpu.
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When multiple cpu variants are supported, the sizes of some structs
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can vary. */
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typedef struct {
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/* The size of the SIM_CPU struct. */
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int sim_cpu_size;
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#define IMP_PROPS_SIM_CPU_SIZE(cpu_props) ((cpu_props)->sim_cpu_size)
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/* An SCACHE element can vary in size, depending on the selected cpu.
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This is zero if the SCACHE isn't in use for this variant. */
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int scache_elm_size;
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#define IMP_PROPS_SCACHE_ELM_SIZE(cpu_props) ((cpu_props)->scache_elm_size)
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} SIM_MACH_IMP_PROPERTIES;
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/* A machine variant. */
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typedef struct {
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const char *name;
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#define MACH_NAME(m) ((m)->name)
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/* This is the argument to bfd_scan_arch. */
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const char *bfd_name;
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#define MACH_BFD_NAME(m) ((m)->bfd_name)
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enum mach_attr num;
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#define MACH_NUM(m) ((m)->num)
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int word_bitsize;
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#define MACH_WORD_BITSIZE(m) ((m)->word_bitsize)
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int addr_bitsize;
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#define MACH_ADDR_BITSIZE(m) ((m)->addr_bitsize)
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/* Pointer to null-entry terminated table of models of this mach.
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The default is the first one. */
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const struct model *models;
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#define MACH_MODELS(m) ((m)->models)
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/* Pointer to the implementation properties of this mach. */
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const SIM_MACH_IMP_PROPERTIES *imp_props;
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#define MACH_IMP_PROPS(m) ((m)->imp_props)
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/* Called by sim_model_set when the model of a cpu is set. */
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void (* init_cpu) (sim_cpu *);
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#define MACH_INIT_CPU(m) ((m)->init_cpu)
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/* Initialize the simulator engine for this cpu.
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Used by cgen simulators to initialize the insn descriptor table. */
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void (* prepare_run) (sim_cpu *);
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#define MACH_PREPARE_RUN(m) ((m)->prepare_run)
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} SIM_MACH;
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/* A model (implementation) of a machine. */
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typedef struct model {
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const char *name;
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#define MODEL_NAME(m) ((m)->name)
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const SIM_MACH *mach;
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#define MODEL_MACH(m) ((m)->mach)
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/* An enum that distinguished the model. */
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int num;
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#define MODEL_NUM(m) ((m)->num)
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/* Pointer to timing table for this model. */
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const INSN_TIMING *timing;
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#define MODEL_TIMING(m) ((m)->timing)
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void (* init) (sim_cpu *);
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#define MODEL_INIT(m) ((m)->init)
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} SIM_MODEL;
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/* Tables of supported machines. */
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/* ??? In a simulator of multiple architectures, will need multiple copies of
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this. Have an `archs' array that contains a pointer to the machs array
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for each (which in turn has a pointer to the models array for each). */
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extern const SIM_MACH *sim_machs[];
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/* Model module handlers. */
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extern MODULE_INSTALL_FN sim_model_install;
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/* Support routines. */
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extern void sim_model_set (SIM_DESC sd_, sim_cpu *cpu_, const SIM_MODEL *model_);
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extern const SIM_MODEL *sim_model_lookup (const char *name_);
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extern const SIM_MACH *sim_mach_lookup (const char *name_);
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extern const SIM_MACH *sim_mach_lookup_bfd_name (const char *bfd_name_);
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#endif /* SIM_MODEL_H */
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