| 1 | /* Main simulator entry points specific to the OR1K. |
| 2 | Copyright (C) 2017-2019 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB, the GNU debugger. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 3 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include "sim-main.h" |
| 20 | #include "sim-options.h" |
| 21 | #include "libiberty.h" |
| 22 | #include "bfd.h" |
| 23 | |
| 24 | #ifdef HAVE_STRING_H |
| 25 | #include <string.h> |
| 26 | #else |
| 27 | #ifdef HAVE_STRINGS_H |
| 28 | #include <strings.h> |
| 29 | #endif |
| 30 | #endif |
| 31 | #ifdef HAVE_STDLIB_H |
| 32 | #include <stdlib.h> |
| 33 | #endif |
| 34 | |
| 35 | static void free_state (SIM_DESC); |
| 36 | \f |
| 37 | |
| 38 | /* Cover function of sim_state_free to free the cpu buffers as well. */ |
| 39 | |
| 40 | static void |
| 41 | free_state (SIM_DESC sd) |
| 42 | { |
| 43 | if (STATE_MODULES (sd) != NULL) |
| 44 | sim_module_uninstall (sd); |
| 45 | sim_cpu_free_all (sd); |
| 46 | sim_state_free (sd); |
| 47 | } |
| 48 | |
| 49 | /* Defaults for user passed arguments. */ |
| 50 | static const USI or1k_default_vr = 0x0; |
| 51 | static const USI or1k_default_upr = 0x0 |
| 52 | | SPR_FIELD_MASK_SYS_UPR_UP; |
| 53 | static const USI or1k_default_cpucfgr = 0x0 |
| 54 | | SPR_FIELD_MASK_SYS_CPUCFGR_OB32S |
| 55 | | SPR_FIELD_MASK_SYS_CPUCFGR_OF32S; |
| 56 | |
| 57 | static UWI or1k_upr; |
| 58 | static UWI or1k_vr; |
| 59 | static UWI or1k_cpucfgr; |
| 60 | |
| 61 | enum |
| 62 | { |
| 63 | OPTION_OR1K_VR, |
| 64 | OPTION_OR1K_UPR, |
| 65 | OPTION_OR1K_CPUCFGR = OPTION_START, |
| 66 | }; |
| 67 | |
| 68 | /* Setup help and handlers for the user defined arguments. */ |
| 69 | DECLARE_OPTION_HANDLER (or1k_option_handler); |
| 70 | |
| 71 | static const OPTION or1k_options[] = { |
| 72 | {{"or1k-cpucfgr", required_argument, NULL, OPTION_OR1K_CPUCFGR}, |
| 73 | '\0', "INTEGER|default", "Set simulator CPUCFGR value", |
| 74 | or1k_option_handler}, |
| 75 | {{"or1k-vr", required_argument, NULL, OPTION_OR1K_VR}, |
| 76 | '\0', "INTEGER|default", "Set simulator VR value", |
| 77 | or1k_option_handler}, |
| 78 | {{"or1k-upr", required_argument, NULL, OPTION_OR1K_UPR}, |
| 79 | '\0', "INTEGER|default", "Set simulator UPR value", |
| 80 | or1k_option_handler}, |
| 81 | {{NULL, no_argument, NULL, 0}, '\0', NULL, NULL, NULL} |
| 82 | }; |
| 83 | |
| 84 | /* Handler for parsing user defined arguments. Currently we support |
| 85 | configuring some of the CPU implementation specific registers including |
| 86 | the Version Register (VR), the Unit Present Register (UPR) and the CPU |
| 87 | Configuration Register (CPUCFGR). */ |
| 88 | SIM_RC |
| 89 | or1k_option_handler (SIM_DESC sd, sim_cpu *cpu, int opt, char *arg, |
| 90 | int is_command) |
| 91 | { |
| 92 | switch (opt) |
| 93 | { |
| 94 | case OPTION_OR1K_VR: |
| 95 | if (strcmp ("default", arg) == 0) |
| 96 | or1k_vr = or1k_default_vr; |
| 97 | else |
| 98 | { |
| 99 | unsigned long long n; |
| 100 | char *endptr; |
| 101 | |
| 102 | n = strtoull (arg, &endptr, 0); |
| 103 | if (*arg != '\0' && *endptr == '\0') |
| 104 | or1k_vr = n; |
| 105 | else |
| 106 | return SIM_RC_FAIL; |
| 107 | } |
| 108 | return SIM_RC_OK; |
| 109 | |
| 110 | case OPTION_OR1K_UPR: |
| 111 | if (strcmp ("default", arg) == 0) |
| 112 | or1k_upr = or1k_default_upr; |
| 113 | else |
| 114 | { |
| 115 | unsigned long long n; |
| 116 | char *endptr; |
| 117 | |
| 118 | n = strtoull (arg, &endptr, 0); |
| 119 | if (*arg != '\0' && *endptr == '\0') |
| 120 | or1k_upr = n; |
| 121 | else |
| 122 | { |
| 123 | sim_io_eprintf |
| 124 | (sd, "invalid argument to option --or1k-upr: `%s'\n", arg); |
| 125 | return SIM_RC_FAIL; |
| 126 | } |
| 127 | } |
| 128 | return SIM_RC_OK; |
| 129 | |
| 130 | case OPTION_OR1K_CPUCFGR: |
| 131 | if (strcmp ("default", arg) == 0) |
| 132 | or1k_cpucfgr = or1k_default_cpucfgr; |
| 133 | else |
| 134 | { |
| 135 | unsigned long long n; |
| 136 | char *endptr; |
| 137 | |
| 138 | n = strtoull (arg, &endptr, 0); |
| 139 | if (*arg != '\0' && *endptr == '\0') |
| 140 | or1k_cpucfgr = n; |
| 141 | else |
| 142 | { |
| 143 | sim_io_eprintf |
| 144 | (sd, "invalid argument to option --or1k-cpucfgr: `%s'\n", arg); |
| 145 | return SIM_RC_FAIL; |
| 146 | } |
| 147 | } |
| 148 | return SIM_RC_OK; |
| 149 | |
| 150 | default: |
| 151 | sim_io_eprintf (sd, "Unknown or1k option %d\n", opt); |
| 152 | return SIM_RC_FAIL; |
| 153 | } |
| 154 | |
| 155 | return SIM_RC_FAIL; |
| 156 | } |
| 157 | |
| 158 | /* Create an instance of the simulator. */ |
| 159 | |
| 160 | SIM_DESC |
| 161 | sim_open (SIM_OPEN_KIND kind, host_callback *callback, struct bfd *abfd, |
| 162 | char * const *argv) |
| 163 | { |
| 164 | SIM_DESC sd = sim_state_alloc (kind, callback); |
| 165 | char c; |
| 166 | int i; |
| 167 | |
| 168 | /* The cpu data is kept in a separately allocated chunk of memory. */ |
| 169 | if (sim_cpu_alloc_all (sd, 1, cgen_cpu_max_extra_bytes ()) != SIM_RC_OK) |
| 170 | { |
| 171 | free_state (sd); |
| 172 | return 0; |
| 173 | } |
| 174 | |
| 175 | /* Perform initial sim setups. */ |
| 176 | if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK) |
| 177 | { |
| 178 | free_state (sd); |
| 179 | return 0; |
| 180 | } |
| 181 | |
| 182 | or1k_upr = or1k_default_upr; |
| 183 | or1k_vr = or1k_default_vr; |
| 184 | or1k_cpucfgr = or1k_default_cpucfgr; |
| 185 | sim_add_option_table (sd, NULL, or1k_options); |
| 186 | |
| 187 | /* Parse the user passed arguments. */ |
| 188 | if (sim_parse_args (sd, argv) != SIM_RC_OK) |
| 189 | { |
| 190 | free_state (sd); |
| 191 | return 0; |
| 192 | } |
| 193 | |
| 194 | /* Allocate core managed memory if none specified by user. |
| 195 | Use address 4 here in case the user wanted address 0 unmapped. */ |
| 196 | if (sim_core_read_buffer (sd, NULL, read_map, &c, 4, 1) == 0) |
| 197 | { |
| 198 | sim_do_commandf (sd, "memory region 0,0x%x", OR1K_DEFAULT_MEM_SIZE); |
| 199 | } |
| 200 | |
| 201 | /* Check for/establish the reference program image. */ |
| 202 | if (sim_analyze_program (sd, |
| 203 | (STATE_PROG_ARGV (sd) != NULL |
| 204 | ? *STATE_PROG_ARGV (sd) |
| 205 | : NULL), abfd) != SIM_RC_OK) |
| 206 | { |
| 207 | free_state (sd); |
| 208 | return 0; |
| 209 | } |
| 210 | |
| 211 | /* Establish any remaining configuration options. */ |
| 212 | if (sim_config (sd) != SIM_RC_OK) |
| 213 | { |
| 214 | free_state (sd); |
| 215 | return 0; |
| 216 | } |
| 217 | |
| 218 | if (sim_post_argv_init (sd) != SIM_RC_OK) |
| 219 | { |
| 220 | free_state (sd); |
| 221 | return 0; |
| 222 | } |
| 223 | |
| 224 | /* Make sure delay slot mode is consistent with the loaded binary. */ |
| 225 | if (STATE_ARCHITECTURE (sd)->mach == bfd_mach_or1knd) |
| 226 | or1k_cpucfgr |= SPR_FIELD_MASK_SYS_CPUCFGR_ND; |
| 227 | else |
| 228 | or1k_cpucfgr &= ~SPR_FIELD_MASK_SYS_CPUCFGR_ND; |
| 229 | |
| 230 | /* Open a copy of the cpu descriptor table and initialize the |
| 231 | disassembler. These initialization functions are generated by CGEN |
| 232 | using the binutils scheme cpu description files. */ |
| 233 | { |
| 234 | CGEN_CPU_DESC cd = |
| 235 | or1k_cgen_cpu_open_1 (STATE_ARCHITECTURE (sd)->printable_name, |
| 236 | CGEN_ENDIAN_BIG); |
| 237 | for (i = 0; i < MAX_NR_PROCESSORS; ++i) |
| 238 | { |
| 239 | SIM_CPU *cpu = STATE_CPU (sd, i); |
| 240 | CPU_CPU_DESC (cpu) = cd; |
| 241 | CPU_DISASSEMBLER (cpu) = sim_cgen_disassemble_insn; |
| 242 | } |
| 243 | or1k_cgen_init_dis (cd); |
| 244 | } |
| 245 | |
| 246 | /* Initialize various cgen things not done by common framework. |
| 247 | Must be done after or1k_cgen_cpu_open. */ |
| 248 | cgen_init (sd); |
| 249 | |
| 250 | /* Do some final OpenRISC sim specific initializations. */ |
| 251 | for (c = 0; c < MAX_NR_PROCESSORS; ++c) |
| 252 | { |
| 253 | SIM_CPU *cpu = STATE_CPU (sd, i); |
| 254 | /* Only needed for profiling, but the structure member is small. */ |
| 255 | memset (CPU_OR1K_MISC_PROFILE (cpu), 0, |
| 256 | sizeof (*CPU_OR1K_MISC_PROFILE (cpu))); |
| 257 | |
| 258 | or1k_cpu_init (sd, cpu, or1k_vr, or1k_upr, or1k_cpucfgr); |
| 259 | } |
| 260 | |
| 261 | return sd; |
| 262 | } |
| 263 | \f |
| 264 | |
| 265 | SIM_RC |
| 266 | sim_create_inferior (SIM_DESC sd, struct bfd *abfd, |
| 267 | char * const *argv, char * const *envp) |
| 268 | { |
| 269 | SIM_CPU *current_cpu = STATE_CPU (sd, 0); |
| 270 | SIM_ADDR addr; |
| 271 | |
| 272 | if (abfd != NULL) |
| 273 | addr = bfd_get_start_address (abfd); |
| 274 | else |
| 275 | addr = 0; |
| 276 | sim_pc_set (current_cpu, addr); |
| 277 | |
| 278 | return SIM_RC_OK; |
| 279 | } |