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c906108c SS |
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) | |
7a292a7a SS |
82 | enum mach_attr num; |
83 | #define MACH_NUM(m) ((m)->num) | |
84 | ||
c906108c SS |
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 */ |