emul_generic.c revision 1.1.1.1
1 /* This file is part of the program psim. 2 3 Copyright (C) 1994-1997, Andrew Cagney <cagney (at) highland.com.au> 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 2 of the License, or 8 (at your option) any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program; if not, write to the Free Software 17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 18 19 */ 20 21 22 #ifndef _EMUL_GENERIC_C_ 23 #define _EMUL_GENERIC_C_ 24 25 #include "emul_generic.h" 26 27 #ifndef STATIC_INLINE_EMUL_GENERIC 28 #define STATIC_INLINE_EMUL_GENERIC STATIC_INLINE 29 #endif 30 31 32 STATIC_INLINE_EMUL_GENERIC void 33 emul_syscall_enter(emul_syscall *emul, 34 int call, 35 int arg0, 36 cpu *processor, 37 unsigned_word cia) 38 { 39 printf_filtered("%d:0x%lx:%s(", 40 cpu_nr(processor) + 1, 41 (long)cia, 42 emul->syscall_descriptor[call].name); 43 } 44 45 46 STATIC_INLINE_EMUL_GENERIC void 47 emul_syscall_exit(emul_syscall *emul, 48 int call, 49 int arg0, 50 cpu *processor, 51 unsigned_word cia) 52 { 53 int status = cpu_registers(processor)->gpr[3]; 54 int error = cpu_registers(processor)->gpr[0]; 55 printf_filtered(")=%d", status); 56 if (error > 0 && error < emul->nr_error_names) 57 printf_filtered("[%s]", emul->error_names[error]); 58 printf_filtered("\n"); 59 } 60 61 62 INLINE_EMUL_GENERIC unsigned64 63 emul_read_gpr64(cpu *processor, 64 int g) 65 { 66 unsigned32 hi; 67 unsigned32 lo; 68 if (CURRENT_TARGET_BYTE_ORDER == BIG_ENDIAN) { 69 hi = cpu_registers(processor)->gpr[g]; 70 lo = cpu_registers(processor)->gpr[g+1]; 71 } 72 else { 73 lo = cpu_registers(processor)->gpr[g]; 74 hi = cpu_registers(processor)->gpr[g+1]; 75 } 76 return (INSERTED64(hi, 0, 31) | INSERTED64(lo, 32, 63)); 77 } 78 79 80 INLINE_EMUL_GENERIC void 81 emul_write_gpr64(cpu *processor, 82 int g, 83 unsigned64 val) 84 { 85 unsigned32 hi = EXTRACTED64(val, 0, 31); 86 unsigned32 lo = EXTRACTED64(val, 32, 63); 87 if (CURRENT_TARGET_BYTE_ORDER == BIG_ENDIAN) { 88 cpu_registers(processor)->gpr[g] = hi; 89 cpu_registers(processor)->gpr[g+1] = lo; 90 } 91 else { 92 cpu_registers(processor)->gpr[g] = lo; 93 cpu_registers(processor)->gpr[g+1] = hi; 94 } 95 } 96 97 98 INLINE_EMUL_GENERIC char * 99 emul_read_string(char *dest, 100 unsigned_word addr, 101 unsigned nr_bytes, 102 cpu *processor, 103 unsigned_word cia) 104 { 105 unsigned nr_moved = 0; 106 if (addr == 0) 107 return NULL; 108 while (1) { 109 dest[nr_moved] = vm_data_map_read_1(cpu_data_map(processor), 110 addr + nr_moved, 111 processor, cia); 112 if (dest[nr_moved] == '\0' || nr_moved >= nr_bytes) 113 break; 114 nr_moved++; 115 } 116 dest[nr_moved] = '\0'; 117 return dest; 118 } 119 120 121 INLINE_EMUL_GENERIC void 122 emul_write_status(cpu *processor, 123 int status, 124 int errno) 125 { 126 if (status == -1 && errno != 0) { 127 cpu_registers(processor)->gpr[3] = errno; 128 CR_SET(0, cr_i_summary_overflow); 129 } 130 else { 131 cpu_registers(processor)->gpr[3] = status; 132 CR_SET(0, 0); 133 } 134 } 135 136 137 INLINE_EMUL_GENERIC void 138 emul_write2_status(cpu *processor, 139 int status1, 140 int status2, 141 int errno) 142 { 143 if (status1 == -1 && errno != 0) { 144 cpu_registers(processor)->gpr[3] = errno; 145 CR_SET(0, cr_i_summary_overflow); 146 } 147 else { 148 cpu_registers(processor)->gpr[3] = status1; 149 cpu_registers(processor)->gpr[4] = status2; 150 CR_SET(0, 0); 151 } 152 } 153 154 155 INLINE_EMUL_GENERIC unsigned_word 156 emul_read_word(unsigned_word addr, 157 cpu *processor, 158 unsigned_word cia) 159 { 160 return vm_data_map_read_word(cpu_data_map(processor), 161 addr, 162 processor, cia); 163 } 164 165 166 INLINE_EMUL_GENERIC void 167 emul_write_word(unsigned_word addr, 168 unsigned_word buf, 169 cpu *processor, 170 unsigned_word cia) 171 { 172 vm_data_map_write_word(cpu_data_map(processor), 173 addr, 174 buf, 175 processor, cia); 176 } 177 178 179 INLINE_EMUL_GENERIC void 180 emul_write_buffer(const void *source, 181 unsigned_word addr, 182 unsigned nr_bytes, 183 cpu *processor, 184 unsigned_word cia) 185 { 186 int nr_moved; 187 for (nr_moved = 0; nr_moved < nr_bytes; nr_moved++) { 188 vm_data_map_write_1(cpu_data_map(processor), 189 addr + nr_moved, 190 ((const char*)source)[nr_moved], 191 processor, cia); 192 } 193 } 194 195 196 INLINE_EMUL_GENERIC void 197 emul_read_buffer(void *dest, 198 unsigned_word addr, 199 unsigned nr_bytes, 200 cpu *processor, 201 unsigned_word cia) 202 { 203 int nr_moved; 204 for (nr_moved = 0; nr_moved < nr_bytes; nr_moved++) { 205 ((char*)dest)[nr_moved] = vm_data_map_read_1(cpu_data_map(processor), 206 addr + nr_moved, 207 processor, cia); 208 } 209 } 210 211 212 INLINE_EMUL_GENERIC void 213 emul_do_system_call(os_emul_data *emul_data, 214 emul_syscall *emul, 215 unsigned call, 216 const int arg0, 217 cpu *processor, 218 unsigned_word cia) 219 { 220 emul_syscall_handler *handler = NULL; 221 if (call >= emul->nr_system_calls) 222 error("do_call() os_emul call %d out-of-range\n", call); 223 224 handler = emul->syscall_descriptor[call].handler; 225 if (handler == NULL) { 226 if (emul->syscall_descriptor[call].name) { 227 error("do_call() unimplemented call %s\n", emul->syscall_descriptor[call].name); 228 } else { 229 error("do_call() unimplemented call %d\n", call); 230 } 231 } 232 233 if (WITH_TRACE && ppc_trace[trace_os_emul]) 234 emul_syscall_enter(emul, call, arg0, processor, cia); 235 236 cpu_registers(processor)->gpr[0] = 0; /* default success */ 237 handler(emul_data, call, arg0, processor, cia); 238 239 if (WITH_TRACE && ppc_trace[trace_os_emul]) 240 emul_syscall_exit(emul, call, arg0, processor, cia); 241 } 242 243 244 /* default size for the first bank of memory */ 245 246 #ifndef OEA_MEMORY_SIZE 247 #define OEA_MEMORY_SIZE 0x100000 248 #endif 249 250 251 /* Add options to the device tree */ 252 253 INLINE_EMUL_GENERIC void 254 emul_add_tree_options(device *tree, 255 bfd *image, 256 const char *emul, 257 const char *env, 258 int oea_interrupt_prefix) 259 { 260 int little_endian = 0; 261 262 /* sort out little endian */ 263 if (tree_find_property(tree, "/options/little-endian?")) 264 little_endian = tree_find_boolean_property(tree, "/options/little-endian?"); 265 else { 266 #ifdef bfd_little_endian /* new bfd */ 267 little_endian = (image != NULL && bfd_little_endian(image)); 268 #else 269 little_endian = (image != NULL && 270 !image->xvec->byteorder_big_p); 271 #endif 272 tree_parse(tree, "/options/little-endian? %s", 273 little_endian ? "true" : "false"); 274 } 275 276 /* misc other stuff */ 277 tree_parse(tree, "/openprom/options/oea-memory-size 0x%x", 278 OEA_MEMORY_SIZE); 279 tree_parse(tree, "/openprom/options/oea-interrupt-prefix %d", 280 oea_interrupt_prefix); 281 tree_parse(tree, "/openprom/options/smp 1"); 282 tree_parse(tree, "/openprom/options/env %s", env); 283 tree_parse(tree, "/openprom/options/os-emul %s", emul); 284 tree_parse(tree, "/openprom/options/strict-alignment? %s", 285 (WITH_ALIGNMENT == STRICT_ALIGNMENT) 286 ? "true" : "false"); 287 tree_parse(tree, "/openprom/options/floating-point? %s", 288 WITH_FLOATING_POINT ? "true" : "false"); 289 tree_parse(tree, "/openprom/options/use-stdio? %s", 290 ((WITH_STDIO == DO_USE_STDIO 291 || WITH_STDIO == 0) 292 ? "true" : "false")); 293 tree_parse(tree, "/openprom/options/model \"%s", 294 model_name[WITH_DEFAULT_MODEL]); 295 tree_parse(tree, "/openprom/options/model-issue %d", 296 MODEL_ISSUE_IGNORE); 297 298 /* useful options */ 299 } 300 301 INLINE_EMUL_GENERIC void 302 emul_add_tree_hardware(device *root) 303 { 304 int i; 305 int nr_cpus = tree_find_integer_property(root, "/openprom/options/smp"); 306 307 /* sanity check the number of processors */ 308 if (nr_cpus > MAX_NR_PROCESSORS) 309 error("Specified number of processors (%d) exceeds the number configured (%d).\n", 310 nr_cpus, MAX_NR_PROCESSORS); 311 312 /* set the number of address cells (1 or 2) */ 313 tree_parse(root, "#address-cells %d", WITH_TARGET_WORD_BITSIZE / 32); 314 315 /* add some memory */ 316 if (tree_find_device(root, "/memory") == NULL) { 317 unsigned_word memory_size = 318 tree_find_integer_property(root, "/openprom/options/oea-memory-size"); 319 const unsigned_word avail_start = 0x3000; 320 tree_parse(root, "/memory@0/reg 0x0 0x%lx", 321 (unsigned long)memory_size); 322 /* reserve the first 0x3000 for the PowerPC interrupt table */ 323 tree_parse(root, "/memory@0/available 0x%lx 0x%lx", 324 (unsigned long)avail_start, 325 (unsigned long)memory_size - avail_start); 326 } 327 328 /* our processors */ 329 for (i = 0; i < nr_cpus; i++) { 330 tree_parse(root, "/cpus/cpu@%d/cpu-nr %d", i, i); 331 } 332 333 /* the debugging pal - hide it in the openprom and don't attach it 334 to any bus */ 335 tree_parse(root, "/openprom/pal"); 336 337 /* chosen etc */ 338 tree_parse(root, "/chosen/stdin */openprom/pal"); 339 tree_parse(root, "/chosen/stdout !/chosen/stdin"); 340 tree_parse(root, "/chosen/memory */memory"); 341 } 342 343 #endif /* _EMUL_GENERIC_C_ */ 344
Indexes created Sun Apr 05 00:22:41 UTC 2026