| 1 | /* This file is part of the program psim. |
| 2 | |
| 3 | Copyright (C) 1994-1997, Andrew Cagney <cagney@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 _HW_INIT_C_ |
| 23 | #define _HW_INIT_C_ |
| 24 | |
| 25 | #include "device_table.h" |
| 26 | #include "bfd.h" |
| 27 | #include "psim.h" |
| 28 | |
| 29 | |
| 30 | /* DMA a file into memory */ |
| 31 | static int |
| 32 | dma_file(device *me, |
| 33 | const char *file_name, |
| 34 | unsigned_word addr) |
| 35 | { |
| 36 | int count; |
| 37 | int inc; |
| 38 | FILE *image; |
| 39 | char buf[1024]; |
| 40 | |
| 41 | /* get it open */ |
| 42 | image = fopen(file_name, "r"); |
| 43 | if (image == NULL) |
| 44 | return -1; |
| 45 | |
| 46 | /* read it in slowly */ |
| 47 | count = 0; |
| 48 | while (1) { |
| 49 | inc = fread(buf, 1, sizeof(buf), image); |
| 50 | if (inc <= 0) |
| 51 | break; |
| 52 | if (device_dma_write_buffer(device_parent(me), |
| 53 | buf, |
| 54 | 0 /*address-space*/, |
| 55 | addr+count, |
| 56 | inc /*nr-bytes*/, |
| 57 | 1 /*violate ro*/) != inc) { |
| 58 | fclose(image); |
| 59 | return -1; |
| 60 | } |
| 61 | count += inc; |
| 62 | } |
| 63 | |
| 64 | /* close down again */ |
| 65 | fclose(image); |
| 66 | |
| 67 | return count; |
| 68 | } |
| 69 | |
| 70 | |
| 71 | /* DEVICE |
| 72 | |
| 73 | file - load a file into memory |
| 74 | |
| 75 | DESCRIPTION |
| 76 | |
| 77 | Loads the entire contents of <file-name> into memory at starting at |
| 78 | <<real-address>>. Assumes that memory exists for the load. |
| 79 | |
| 80 | PROPERTIES |
| 81 | |
| 82 | file-name = <string> |
| 83 | |
| 84 | Name of the file to be loaded into memory |
| 85 | |
| 86 | real-address = <integer> |
| 87 | |
| 88 | Real address at which the file is to be loaded */ |
| 89 | |
| 90 | static void |
| 91 | hw_file_init_data_callback(device *me) |
| 92 | { |
| 93 | int count; |
| 94 | const char *file_name = device_find_string_property(me, "file-name"); |
| 95 | unsigned_word addr = device_find_integer_property(me, "real-address"); |
| 96 | /* load the file */ |
| 97 | count = dma_file(me, file_name, addr); |
| 98 | if (count < 0) |
| 99 | device_error(me, "Problem loading file %s\n", file_name); |
| 100 | } |
| 101 | |
| 102 | |
| 103 | static device_callbacks const hw_file_callbacks = { |
| 104 | { NULL, hw_file_init_data_callback, }, |
| 105 | { NULL, }, /* address */ |
| 106 | { NULL, }, /* IO */ |
| 107 | { NULL, }, /* DMA */ |
| 108 | { NULL, }, /* interrupt */ |
| 109 | { NULL, }, /* unit */ |
| 110 | }; |
| 111 | |
| 112 | |
| 113 | /* DEVICE |
| 114 | |
| 115 | |
| 116 | data - initialize a memory location with specified data |
| 117 | |
| 118 | |
| 119 | DESCRIPTION |
| 120 | |
| 121 | |
| 122 | The pseudo device <<data>> provides a mechanism specifying the |
| 123 | initialization of a small section of memory. |
| 124 | |
| 125 | Normally, the data would be written using a dma operation. |
| 126 | However, for some addresses this will not result in the desired |
| 127 | result. For instance, to initialize an address in an eeprom, |
| 128 | instead of a simple dma of the data, a sequence of writes (and then |
| 129 | real delays) that program the eeprom would be required. |
| 130 | |
| 131 | For dma write initialization, the data device will write the |
| 132 | specified <<data>> to <<real-address>> using a normal dma. |
| 133 | |
| 134 | For instance write initialization, the specified <<instance>> is |
| 135 | opened. Then a seek to the <<real-address>> is performed followed |
| 136 | by a write of the data. |
| 137 | |
| 138 | |
| 139 | Integer properties are stored using the target's endian mode. |
| 140 | |
| 141 | |
| 142 | PROPERTIES |
| 143 | |
| 144 | |
| 145 | data = <any-valid-property> (required) |
| 146 | |
| 147 | Data to be loaded into memory. The property type determines how it |
| 148 | is loaded. |
| 149 | |
| 150 | |
| 151 | real-address = <integer> (required) |
| 152 | |
| 153 | Start address at which the data is to be stored. |
| 154 | |
| 155 | |
| 156 | instance = <string> (optional) |
| 157 | |
| 158 | Instance specification of the device that is to be opened so that |
| 159 | the specified data can be written to it. |
| 160 | |
| 161 | |
| 162 | EXAMPLES |
| 163 | |
| 164 | |
| 165 | The examples below illustrate the two alternative mechanisms that |
| 166 | can be used to store the value 0x12345678 at address 0xfff00c00, |
| 167 | which is normally part of the 512k system eeprom. |
| 168 | |
| 169 | |
| 170 | If the eeprom is being modeled by ram (<<memory>> device) then the |
| 171 | standard dma initialization can be used. By convention: the data |
| 172 | devices are uniquely identified by argumenting them with the |
| 173 | destinations real address; and all data devices are put under the |
| 174 | node <</openprom/init>>. |
| 175 | |
| 176 | | /openprom/memory@0xfff00000/reg 0xfff00000 0x80000 |
| 177 | | /openprom/init/data@0x1000/data 0x12345678 |
| 178 | | /openprom/init/data@0x1000/real-address 0x1000 |
| 179 | |
| 180 | |
| 181 | If instead a real eeprom was being used the instance write method |
| 182 | would instead need to be used (storing just a single byte in an |
| 183 | eeprom requires a complex sequence of accesses). The |
| 184 | <<real-address>> is specified as <<0x0c00>> which is the offset |
| 185 | into the eeprom. For brevity, most of the eeprom properties have |
| 186 | been omited. |
| 187 | |
| 188 | | /iobus/eeprom@0xfff00000/reg 0xfff00000 0x80000 |
| 189 | | /openprom/init/data@0xfff00c00/real-address 0x0c00 |
| 190 | | /openprom/init/data@0xfff00c00/data 0x12345667 |
| 191 | | /openprom/init/data@0xfff00c00/instance /iobus/eeprom@0xfff00000/reg |
| 192 | |
| 193 | |
| 194 | BUGS |
| 195 | |
| 196 | |
| 197 | At present, only <<integer>> properties can be specified for an |
| 198 | initial data value. |
| 199 | |
| 200 | */ |
| 201 | |
| 202 | |
| 203 | static void |
| 204 | hw_data_init_data_callback(device *me) |
| 205 | { |
| 206 | unsigned_word addr = device_find_integer_property(me, "real-address"); |
| 207 | const device_property *data = device_find_property(me, "data"); |
| 208 | const char *instance_spec = (device_find_property(me, "instance") != NULL |
| 209 | ? device_find_string_property(me, "instance") |
| 210 | : NULL); |
| 211 | device_instance *instance = NULL; |
| 212 | if (data == NULL) |
| 213 | device_error(me, "missing property <data>\n"); |
| 214 | if (instance_spec != NULL) |
| 215 | instance = tree_instance(me, instance_spec); |
| 216 | switch (data->type) { |
| 217 | case integer_property: |
| 218 | { |
| 219 | unsigned_cell buf = device_find_integer_property(me, "data"); |
| 220 | H2T(buf); |
| 221 | if (instance == NULL) { |
| 222 | if (device_dma_write_buffer(device_parent(me), |
| 223 | &buf, |
| 224 | 0 /*address-space*/, |
| 225 | addr, |
| 226 | sizeof(buf), /*nr-bytes*/ |
| 227 | 1 /*violate ro*/) != sizeof(buf)) |
| 228 | device_error(me, "Problem storing integer 0x%x at 0x%lx\n", |
| 229 | (unsigned)buf, (unsigned long)addr); |
| 230 | } |
| 231 | else { |
| 232 | if (device_instance_seek(instance, 0, addr) < 0 |
| 233 | || device_instance_write(instance, &buf, sizeof(buf)) != sizeof(buf)) |
| 234 | device_error(me, "Problem storing integer 0x%x at 0x%lx of instance %s\n", |
| 235 | (unsigned)buf, (unsigned long)addr, instance_spec); |
| 236 | } |
| 237 | } |
| 238 | break; |
| 239 | default: |
| 240 | device_error(me, "Write of this data is not yet implemented\n"); |
| 241 | break; |
| 242 | } |
| 243 | if (instance != NULL) |
| 244 | device_instance_delete(instance); |
| 245 | } |
| 246 | |
| 247 | |
| 248 | static device_callbacks const hw_data_callbacks = { |
| 249 | { NULL, hw_data_init_data_callback, }, |
| 250 | { NULL, }, /* address */ |
| 251 | { NULL, }, /* IO */ |
| 252 | { NULL, }, /* DMA */ |
| 253 | { NULL, }, /* interrupt */ |
| 254 | { NULL, }, /* unit */ |
| 255 | }; |
| 256 | |
| 257 | |
| 258 | /* DEVICE |
| 259 | |
| 260 | |
| 261 | load-binary - load binary segments into memory |
| 262 | |
| 263 | |
| 264 | DESCRIPTION |
| 265 | |
| 266 | Each loadable segment of the specified binary is loaded into memory |
| 267 | at its required address. It is assumed that the memory at those |
| 268 | addresses already exists. |
| 269 | |
| 270 | This device is normally used to load an executable into memory as |
| 271 | part of real mode simulation. |
| 272 | |
| 273 | |
| 274 | PROPERTIES |
| 275 | |
| 276 | |
| 277 | file-name = <string> |
| 278 | |
| 279 | Name of the binary to be loaded. |
| 280 | |
| 281 | |
| 282 | claim = <anything> (optional) |
| 283 | |
| 284 | If this property is present, the real memory that is to be used by |
| 285 | the image being loaded will be claimed from the memory node |
| 286 | (specified by the ihandle <</chosen/memory>>). |
| 287 | |
| 288 | |
| 289 | BUGS |
| 290 | |
| 291 | |
| 292 | When loading the binary the bfd virtual-address is used. It should |
| 293 | be using the bfd load-address. |
| 294 | |
| 295 | */ |
| 296 | |
| 297 | /* DEVICE |
| 298 | |
| 299 | map-binary - map the binary into the users address space |
| 300 | |
| 301 | DESCRIPTION |
| 302 | |
| 303 | Similar to load-binary except that memory for each segment is |
| 304 | created before the corresponding data for the segment is loaded. |
| 305 | |
| 306 | This device is normally used to load an executable into a user mode |
| 307 | simulation. |
| 308 | |
| 309 | PROPERTIES |
| 310 | |
| 311 | file-name = <string> |
| 312 | |
| 313 | Name of the binary to be loaded. |
| 314 | |
| 315 | */ |
| 316 | |
| 317 | static void |
| 318 | update_for_binary_section(bfd *abfd, |
| 319 | asection *the_section, |
| 320 | PTR obj) |
| 321 | { |
| 322 | unsigned_word section_vma; |
| 323 | unsigned_word section_size; |
| 324 | access_type access; |
| 325 | device *me = (device*)obj; |
| 326 | |
| 327 | /* skip the section if no memory to allocate */ |
| 328 | if (! (bfd_get_section_flags(abfd, the_section) & SEC_ALLOC)) |
| 329 | return; |
| 330 | |
| 331 | /* check/ignore any sections of size zero */ |
| 332 | section_size = bfd_get_section_size_before_reloc(the_section); |
| 333 | if (section_size == 0) |
| 334 | return; |
| 335 | |
| 336 | /* find where it is to go */ |
| 337 | section_vma = bfd_get_section_vma(abfd, the_section); |
| 338 | |
| 339 | DTRACE(binary, |
| 340 | ("name=%-7s, vma=0x%.8lx, size=%6ld, flags=%3lx(%s%s%s%s%s )\n", |
| 341 | bfd_get_section_name(abfd, the_section), |
| 342 | (long)section_vma, |
| 343 | (long)section_size, |
| 344 | (long)bfd_get_section_flags(abfd, the_section), |
| 345 | bfd_get_section_flags(abfd, the_section) & SEC_LOAD ? " LOAD" : "", |
| 346 | bfd_get_section_flags(abfd, the_section) & SEC_CODE ? " CODE" : "", |
| 347 | bfd_get_section_flags(abfd, the_section) & SEC_DATA ? " DATA" : "", |
| 348 | bfd_get_section_flags(abfd, the_section) & SEC_ALLOC ? " ALLOC" : "", |
| 349 | bfd_get_section_flags(abfd, the_section) & SEC_READONLY ? " READONLY" : "" |
| 350 | )); |
| 351 | |
| 352 | /* If there is an .interp section, it means it needs a shared library interpreter. */ |
| 353 | if (strcmp(".interp", bfd_get_section_name(abfd, the_section)) == 0) |
| 354 | error("Shared libraries are not yet supported.\n"); |
| 355 | |
| 356 | /* determine the devices access */ |
| 357 | access = access_read; |
| 358 | if (bfd_get_section_flags(abfd, the_section) & SEC_CODE) |
| 359 | access |= access_exec; |
| 360 | if (!(bfd_get_section_flags(abfd, the_section) & SEC_READONLY)) |
| 361 | access |= access_write; |
| 362 | |
| 363 | /* if claim specified, allocate region from the memory device */ |
| 364 | if (device_find_property(me, "claim") != NULL) { |
| 365 | device_instance *memory = tree_find_ihandle_property(me, "/chosen/memory"); |
| 366 | unsigned_cell mem_in[3]; |
| 367 | unsigned_cell mem_out[1]; |
| 368 | mem_in[0] = 0; /*alignment - top-of-stack*/ |
| 369 | mem_in[1] = section_size; |
| 370 | mem_in[2] = section_vma; |
| 371 | if (device_instance_call_method(memory, "claim", 3, mem_in, 1, mem_out) < 0) |
| 372 | device_error(me, "failed to claim memory for section at 0x%lx (0x%lx", |
| 373 | section_vma, |
| 374 | section_size); |
| 375 | if (mem_out[0] != section_vma) |
| 376 | device_error(me, "section address not as requested"); |
| 377 | } |
| 378 | |
| 379 | /* if a map, pass up a request to create the memory in core */ |
| 380 | if (strncmp(device_name(me), "map-binary", strlen("map-binary")) == 0) |
| 381 | device_attach_address(device_parent(me), |
| 382 | attach_raw_memory, |
| 383 | 0 /*address space*/, |
| 384 | section_vma, |
| 385 | section_size, |
| 386 | access, |
| 387 | me); |
| 388 | |
| 389 | /* if a load dma in the required data */ |
| 390 | if (bfd_get_section_flags(abfd, the_section) & SEC_LOAD) { |
| 391 | void *section_init = zalloc(section_size); |
| 392 | if (!bfd_get_section_contents(abfd, |
| 393 | the_section, |
| 394 | section_init, 0, |
| 395 | section_size)) { |
| 396 | bfd_perror("binary"); |
| 397 | device_error(me, "load of data failed"); |
| 398 | return; |
| 399 | } |
| 400 | if (device_dma_write_buffer(device_parent(me), |
| 401 | section_init, |
| 402 | 0 /*space*/, |
| 403 | section_vma, |
| 404 | section_size, |
| 405 | 1 /*violate_read_only*/) |
| 406 | != section_size) |
| 407 | device_error(me, "broken transfer\n"); |
| 408 | zfree(section_init); /* only free if load */ |
| 409 | } |
| 410 | } |
| 411 | |
| 412 | static void |
| 413 | hw_binary_init_data_callback(device *me) |
| 414 | { |
| 415 | /* get the file name */ |
| 416 | const char *file_name = device_find_string_property(me, "file-name"); |
| 417 | bfd *image; |
| 418 | |
| 419 | /* open the file */ |
| 420 | image = bfd_openr(file_name, NULL); |
| 421 | if (image == NULL) { |
| 422 | bfd_perror("binary"); |
| 423 | device_error(me, "Failed to open file %s\n", file_name); |
| 424 | } |
| 425 | |
| 426 | /* check it is valid */ |
| 427 | if (!bfd_check_format(image, bfd_object)) { |
| 428 | bfd_close(image); |
| 429 | device_error(me, "The file %s has an invalid binary format\n", file_name); |
| 430 | } |
| 431 | |
| 432 | /* and the data sections */ |
| 433 | bfd_map_over_sections(image, |
| 434 | update_for_binary_section, |
| 435 | (PTR)me); |
| 436 | |
| 437 | bfd_close(image); |
| 438 | } |
| 439 | |
| 440 | |
| 441 | static device_callbacks const hw_binary_callbacks = { |
| 442 | { NULL, hw_binary_init_data_callback, }, |
| 443 | { NULL, }, /* address */ |
| 444 | { NULL, }, /* IO */ |
| 445 | { NULL, }, /* DMA */ |
| 446 | { NULL, }, /* interrupt */ |
| 447 | { NULL, }, /* unit */ |
| 448 | }; |
| 449 | |
| 450 | |
| 451 | /* DEVICE |
| 452 | |
| 453 | stack - create an initial stack frame in memory |
| 454 | |
| 455 | DESCRIPTION |
| 456 | |
| 457 | Creates a stack frame of the specified type in memory. |
| 458 | |
| 459 | Due to the startup sequence gdb uses when commencing a simulation, |
| 460 | it is not possible for the data to be placed on the stack to be |
| 461 | specified as part of the device tree. Instead the arguments to be |
| 462 | pushed onto the stack are specified using an IOCTL call. |
| 463 | |
| 464 | The IOCTL takes the additional arguments: |
| 465 | |
| 466 | | unsigned_word stack_end -- where the stack should come down from |
| 467 | | char **argv -- ... |
| 468 | | char **envp -- ... |
| 469 | |
| 470 | PROPERTIES |
| 471 | |
| 472 | stack-type = <string> |
| 473 | |
| 474 | The form of the stack frame that is to be created. |
| 475 | |
| 476 | */ |
| 477 | |
| 478 | static int |
| 479 | sizeof_argument_strings(char **arg) |
| 480 | { |
| 481 | int sizeof_strings = 0; |
| 482 | |
| 483 | /* robust */ |
| 484 | if (arg == NULL) |
| 485 | return 0; |
| 486 | |
| 487 | /* add up all the string sizes (padding as we go) */ |
| 488 | for (; *arg != NULL; arg++) { |
| 489 | int len = strlen(*arg) + 1; |
| 490 | sizeof_strings += ALIGN_8(len); |
| 491 | } |
| 492 | |
| 493 | return sizeof_strings; |
| 494 | } |
| 495 | |
| 496 | static int |
| 497 | number_of_arguments(char **arg) |
| 498 | { |
| 499 | int nr; |
| 500 | if (arg == NULL) |
| 501 | return 0; |
| 502 | for (nr = 0; *arg != NULL; arg++, nr++); |
| 503 | return nr; |
| 504 | } |
| 505 | |
| 506 | static int |
| 507 | sizeof_arguments(char **arg) |
| 508 | { |
| 509 | return ALIGN_8((number_of_arguments(arg) + 1) * sizeof(unsigned_word)); |
| 510 | } |
| 511 | |
| 512 | static void |
| 513 | write_stack_arguments(device *me, |
| 514 | char **arg, |
| 515 | unsigned_word start_block, |
| 516 | unsigned_word end_block, |
| 517 | unsigned_word start_arg, |
| 518 | unsigned_word end_arg) |
| 519 | { |
| 520 | DTRACE(stack, |
| 521 | ("write_stack_arguments(device=%s, arg=0x%lx, start_block=0x%lx, end_block=0x%lx, start_arg=0x%lx, end_arg=0x%lx)\n", |
| 522 | device_name(me), (long)arg, (long)start_block, (long)end_block, (long)start_arg, (long)end_arg)); |
| 523 | if (arg == NULL) |
| 524 | device_error(me, "Attempt to write a null array onto the stack\n"); |
| 525 | /* only copy in arguments, memory is already zero */ |
| 526 | for (; *arg != NULL; arg++) { |
| 527 | int len = strlen(*arg)+1; |
| 528 | unsigned_word target_start_block; |
| 529 | DTRACE(stack, |
| 530 | ("write_stack_arguments() write %s=%s at %s=0x%lx %s=0x%lx %s=0x%lx\n", |
| 531 | "**arg", *arg, "start_block", (long)start_block, |
| 532 | "len", (long)len, "start_arg", (long)start_arg)); |
| 533 | if (psim_write_memory(device_system(me), 0, *arg, |
| 534 | start_block, len, |
| 535 | 0/*violate_readonly*/) != len) |
| 536 | device_error(me, "Write of **arg (%s) at 0x%lx of stack failed\n", |
| 537 | *arg, (unsigned long)start_block); |
| 538 | target_start_block = H2T_word(start_block); |
| 539 | if (psim_write_memory(device_system(me), 0, &target_start_block, |
| 540 | start_arg, sizeof(target_start_block), |
| 541 | 0) != sizeof(target_start_block)) |
| 542 | device_error(me, "Write of *arg onto stack failed\n"); |
| 543 | start_block += ALIGN_8(len); |
| 544 | start_arg += sizeof(start_block); |
| 545 | } |
| 546 | start_arg += sizeof(start_block); /*the null at the end*/ |
| 547 | if (start_block != end_block |
| 548 | || ALIGN_8(start_arg) != end_arg) |
| 549 | device_error(me, "Probable corrpution of stack arguments\n"); |
| 550 | DTRACE(stack, ("write_stack_arguments() = void\n")); |
| 551 | } |
| 552 | |
| 553 | static void |
| 554 | create_ppc_elf_stack_frame(device *me, |
| 555 | unsigned_word bottom_of_stack, |
| 556 | char **argv, |
| 557 | char **envp) |
| 558 | { |
| 559 | /* fixme - this is over aligned */ |
| 560 | |
| 561 | /* information block */ |
| 562 | const unsigned sizeof_envp_block = sizeof_argument_strings(envp); |
| 563 | const unsigned_word start_envp_block = bottom_of_stack - sizeof_envp_block; |
| 564 | const unsigned sizeof_argv_block = sizeof_argument_strings(argv); |
| 565 | const unsigned_word start_argv_block = start_envp_block - sizeof_argv_block; |
| 566 | |
| 567 | /* auxiliary vector - contains only one entry */ |
| 568 | const unsigned sizeof_aux_entry = 2*sizeof(unsigned_word); /* magic */ |
| 569 | const unsigned_word start_aux = start_argv_block - ALIGN_8(sizeof_aux_entry); |
| 570 | |
| 571 | /* environment points (including null sentinal) */ |
| 572 | const unsigned sizeof_envp = sizeof_arguments(envp); |
| 573 | const unsigned_word start_envp = start_aux - sizeof_envp; |
| 574 | |
| 575 | /* argument pointers (including null sentinal) */ |
| 576 | const int argc = number_of_arguments(argv); |
| 577 | const unsigned sizeof_argv = sizeof_arguments(argv); |
| 578 | const unsigned_word start_argv = start_envp - sizeof_argv; |
| 579 | |
| 580 | /* link register save address - alligned to a 16byte boundary */ |
| 581 | const unsigned_word top_of_stack = ((start_argv |
| 582 | - 2 * sizeof(unsigned_word)) |
| 583 | & ~0xf); |
| 584 | |
| 585 | /* install arguments on stack */ |
| 586 | write_stack_arguments(me, envp, |
| 587 | start_envp_block, bottom_of_stack, |
| 588 | start_envp, start_aux); |
| 589 | write_stack_arguments(me, argv, |
| 590 | start_argv_block, start_envp_block, |
| 591 | start_argv, start_envp); |
| 592 | |
| 593 | /* set up the registers */ |
| 594 | psim_write_register(device_system(me), -1, |
| 595 | &top_of_stack, "sp", cooked_transfer); |
| 596 | psim_write_register(device_system(me), -1, |
| 597 | &argc, "r3", cooked_transfer); |
| 598 | psim_write_register(device_system(me), -1, |
| 599 | &start_argv, "r4", cooked_transfer); |
| 600 | psim_write_register(device_system(me), -1, |
| 601 | &start_envp, "r5", cooked_transfer); |
| 602 | psim_write_register(device_system(me), -1, |
| 603 | &start_aux, "r6", cooked_transfer); |
| 604 | } |
| 605 | |
| 606 | static void |
| 607 | create_ppc_aix_stack_frame(device *me, |
| 608 | unsigned_word bottom_of_stack, |
| 609 | char **argv, |
| 610 | char **envp) |
| 611 | { |
| 612 | unsigned_word core_envp; |
| 613 | unsigned_word core_argv; |
| 614 | unsigned_word core_argc; |
| 615 | unsigned_word core_aux; |
| 616 | unsigned_word top_of_stack; |
| 617 | |
| 618 | /* cheat - create an elf stack frame */ |
| 619 | create_ppc_elf_stack_frame(me, bottom_of_stack, argv, envp); |
| 620 | |
| 621 | /* extract argument addresses from registers */ |
| 622 | psim_read_register(device_system(me), 0, |
| 623 | &top_of_stack, "r1", cooked_transfer); |
| 624 | psim_read_register(device_system(me), 0, |
| 625 | &core_argc, "r3", cooked_transfer); |
| 626 | psim_read_register(device_system(me), 0, |
| 627 | &core_argv, "r4", cooked_transfer); |
| 628 | psim_read_register(device_system(me), 0, |
| 629 | &core_envp, "r5", cooked_transfer); |
| 630 | psim_read_register(device_system(me), 0, |
| 631 | &core_aux, "r6", cooked_transfer); |
| 632 | |
| 633 | /* extract arguments from registers */ |
| 634 | device_error(me, "Unfinished procedure create_ppc_aix_stack_frame\n"); |
| 635 | } |
| 636 | |
| 637 | |
| 638 | static void |
| 639 | create_ppc_chirp_bootargs(device *me, |
| 640 | char **argv) |
| 641 | { |
| 642 | /* concat the arguments */ |
| 643 | char args[1024]; |
| 644 | char **chp = argv + 1; |
| 645 | args[0] = '\0'; |
| 646 | while (*chp != NULL) { |
| 647 | if (strlen(args) > 0) |
| 648 | strcat(args, " "); |
| 649 | if (strlen(args) + strlen(*chp) >= sizeof(args)) |
| 650 | device_error(me, "buffer overflow"); |
| 651 | strcat(args, *chp); |
| 652 | chp++; |
| 653 | } |
| 654 | |
| 655 | /* set the arguments property */ |
| 656 | tree_parse(me, "/chosen/bootargs \"%s", args); |
| 657 | } |
| 658 | |
| 659 | |
| 660 | static int |
| 661 | hw_stack_ioctl(device *me, |
| 662 | cpu *processor, |
| 663 | unsigned_word cia, |
| 664 | device_ioctl_request request, |
| 665 | va_list ap) |
| 666 | { |
| 667 | switch (request) { |
| 668 | case device_ioctl_create_stack: |
| 669 | { |
| 670 | unsigned_word stack_pointer = va_arg(ap, unsigned_word); |
| 671 | char **argv = va_arg(ap, char **); |
| 672 | char **envp = va_arg(ap, char **); |
| 673 | const char *stack_type; |
| 674 | DTRACE(stack, |
| 675 | ("stack_ioctl_callback(me=0x%lx:%s processor=0x%lx cia=0x%lx argv=0x%lx envp=0x%lx)\n", |
| 676 | (long)me, device_name(me), |
| 677 | (long)processor, |
| 678 | (long)cia, |
| 679 | (long)argv, |
| 680 | (long)envp)); |
| 681 | stack_type = device_find_string_property(me, "stack-type"); |
| 682 | if (strcmp(stack_type, "ppc-elf") == 0) |
| 683 | create_ppc_elf_stack_frame(me, stack_pointer, argv, envp); |
| 684 | else if (strcmp(stack_type, "ppc-xcoff") == 0) |
| 685 | create_ppc_aix_stack_frame(me, stack_pointer, argv, envp); |
| 686 | else if (strcmp(stack_type, "chirp") == 0) |
| 687 | create_ppc_chirp_bootargs(me, argv); |
| 688 | else if (strcmp(stack_type, "none") != 0) |
| 689 | device_error(me, "Unknown initial stack frame type %s", stack_type); |
| 690 | DTRACE(stack, |
| 691 | ("stack_ioctl_callback() = void\n")); |
| 692 | break; |
| 693 | } |
| 694 | default: |
| 695 | device_error(me, "Unsupported ioctl requested"); |
| 696 | break; |
| 697 | } |
| 698 | return 0; |
| 699 | } |
| 700 | |
| 701 | static device_callbacks const hw_stack_callbacks = { |
| 702 | { NULL, }, |
| 703 | { NULL, }, /* address */ |
| 704 | { NULL, }, /* IO */ |
| 705 | { NULL, }, /* DMA */ |
| 706 | { NULL, }, /* interrupt */ |
| 707 | { NULL, }, /* unit */ |
| 708 | NULL, /* instance */ |
| 709 | hw_stack_ioctl, |
| 710 | }; |
| 711 | |
| 712 | const device_descriptor hw_init_device_descriptor[] = { |
| 713 | { "file", NULL, &hw_file_callbacks }, |
| 714 | { "data", NULL, &hw_data_callbacks }, |
| 715 | { "load-binary", NULL, &hw_binary_callbacks }, |
| 716 | { "map-binary", NULL, &hw_binary_callbacks }, |
| 717 | { "stack", NULL, &hw_stack_callbacks }, |
| 718 | { NULL }, |
| 719 | }; |
| 720 | |
| 721 | #endif _HW_INIT_C_ |