| 1 | /* Architecture, machine, and model support. |
| 2 | Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc. |
| 3 | Contributed by Cygnus Support. |
| 4 | |
| 5 | This file is part of GDB, the GNU debugger. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License along |
| 18 | with this program; if not, write to the Free Software Foundation, Inc., |
| 19 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | /* Nomenclature: |
| 22 | architecture = one of sparc, mips, sh, etc. |
| 23 | in the sparc architecture, mach = one of v6, v7, v8, sparclite, etc. |
| 24 | in the v8 mach, model = one of supersparc, etc. |
| 25 | */ |
| 26 | |
| 27 | /* This file is intended to be included by sim-basics.h. */ |
| 28 | |
| 29 | #ifndef SIM_MODEL_H |
| 30 | #define SIM_MODEL_H |
| 31 | |
| 32 | /* Function unit and instruction timing support. |
| 33 | ??? This is obviously insufficiently general. |
| 34 | It's useful but it needs elaborating upon. */ |
| 35 | |
| 36 | typedef struct { |
| 37 | unsigned char name; /* actually a UNIT_TYPE enum */ |
| 38 | unsigned char issue; |
| 39 | unsigned char done; |
| 40 | } UNIT; |
| 41 | |
| 42 | #ifndef MAX_UNITS |
| 43 | #define MAX_UNITS 1 |
| 44 | #endif |
| 45 | |
| 46 | typedef int (MODEL_FN) (sim_cpu *, void *); |
| 47 | |
| 48 | typedef struct { |
| 49 | /* This is an integer that identifies this insn. |
| 50 | How this works is up to the target. */ |
| 51 | int num; |
| 52 | |
| 53 | /* Function to handle insn-specific profiling. */ |
| 54 | MODEL_FN *model_fn; |
| 55 | |
| 56 | /* Array of function units used by this insn. */ |
| 57 | UNIT units[MAX_UNITS]; |
| 58 | } INSN_TIMING; |
| 59 | |
| 60 | /* Struct to describe various implementation properties of a cpu. |
| 61 | When multiple cpu variants are supported, the sizes of some structs |
| 62 | can vary. */ |
| 63 | |
| 64 | typedef struct { |
| 65 | /* The size of the SIM_CPU struct. */ |
| 66 | int sim_cpu_size; |
| 67 | #define IMP_PROPS_SIM_CPU_SIZE(cpu_props) ((cpu_props)->sim_cpu_size) |
| 68 | /* An SCACHE element can vary in size, depending on the selected cpu. |
| 69 | This is zero if the SCACHE isn't in use for this variant. */ |
| 70 | int scache_elm_size; |
| 71 | #define IMP_PROPS_SCACHE_ELM_SIZE(cpu_props) ((cpu_props)->scache_elm_size) |
| 72 | } MACH_IMP_PROPERTIES; |
| 73 | |
| 74 | /* A machine variant. */ |
| 75 | |
| 76 | typedef struct { |
| 77 | const char *name; |
| 78 | #define MACH_NAME(m) ((m)->name) |
| 79 | /* This is the argument to bfd_scan_arch. */ |
| 80 | const char *bfd_name; |
| 81 | #define MACH_BFD_NAME(m) ((m)->bfd_name) |
| 82 | enum mach_attr num; |
| 83 | #define MACH_NUM(m) ((m)->num) |
| 84 | |
| 85 | int word_bitsize; |
| 86 | #define MACH_WORD_BITSIZE(m) ((m)->word_bitsize) |
| 87 | int addr_bitsize; |
| 88 | #define MACH_ADDR_BITSIZE(m) ((m)->addr_bitsize) |
| 89 | |
| 90 | /* Pointer to null-entry terminated table of models of this mach. |
| 91 | The default is the first one. */ |
| 92 | const struct model *models; |
| 93 | #define MACH_MODELS(m) ((m)->models) |
| 94 | |
| 95 | /* Pointer to the implementation properties of this mach. */ |
| 96 | const MACH_IMP_PROPERTIES *imp_props; |
| 97 | #define MACH_IMP_PROPS(m) ((m)->imp_props) |
| 98 | |
| 99 | /* Called by sim_model_set when the model of a cpu is set. */ |
| 100 | void (* init_cpu) (sim_cpu *); |
| 101 | #define MACH_INIT_CPU(m) ((m)->init_cpu) |
| 102 | |
| 103 | /* Initialize the simulator engine for this cpu. |
| 104 | Used by cgen simulators to initialize the insn descriptor table. */ |
| 105 | void (* prepare_run) (sim_cpu *); |
| 106 | #define MACH_PREPARE_RUN(m) ((m)->prepare_run) |
| 107 | } MACH; |
| 108 | |
| 109 | /* A model (implementation) of a machine. */ |
| 110 | |
| 111 | typedef struct model { |
| 112 | const char *name; |
| 113 | #define MODEL_NAME(m) ((m)->name) |
| 114 | const MACH *mach; |
| 115 | #define MODEL_MACH(m) ((m)->mach) |
| 116 | /* An enum that distinguished the model. */ |
| 117 | int num; |
| 118 | #define MODEL_NUM(m) ((m)->num) |
| 119 | /* Pointer to timing table for this model. */ |
| 120 | const INSN_TIMING *timing; |
| 121 | #define MODEL_TIMING(m) ((m)->timing) |
| 122 | void (* init) (sim_cpu *); |
| 123 | #define MODEL_INIT(m) ((m)->init) |
| 124 | } MODEL; |
| 125 | |
| 126 | /* Tables of supported machines. */ |
| 127 | /* ??? In a simulator of multiple architectures, will need multiple copies of |
| 128 | this. Have an `archs' array that contains a pointer to the machs array |
| 129 | for each (which in turn has a pointer to the models array for each). */ |
| 130 | extern const MACH *sim_machs[]; |
| 131 | |
| 132 | /* Model module handlers. */ |
| 133 | extern MODULE_INSTALL_FN sim_model_install; |
| 134 | |
| 135 | /* Support routines. */ |
| 136 | extern void sim_model_set (SIM_DESC sd_, sim_cpu *cpu_, const MODEL *model_); |
| 137 | extern const MODEL * sim_model_lookup (const char *name_); |
| 138 | extern const MACH * sim_mach_lookup (const char *name_); |
| 139 | extern const MACH * sim_mach_lookup_bfd_name (const char *bfd_name_); |
| 140 | |
| 141 | #endif /* SIM_MODEL_H */ |