1 /* 2 * arch/parisc/kernel/firmware.c - safe PDC access routines 3 * 4 * PDC == Processor Dependent Code 5 * 6 * See http://www.parisc-linux.org/documentation/index.html 7 * for documentation describing the entry points and calling 8 * conventions defined below. 9 * 10 * Copyright 1999 SuSE GmbH Nuernberg (Philipp Rumpf, prumpf@tux.org) 11 * Copyright 1999 The Puffin Group, (Alex deVries, David Kennedy) 12 * Copyright 2003 Grant Grundler <grundler parisc-linux org> 13 * Copyright 2003,2004 Ryan Bradetich <rbrad@parisc-linux.org> 14 * Copyright 2004,2006 Thibaut VARENE <varenet@parisc-linux.org> 15 * 16 * This program is free software; you can redistribute it and/or modify 17 * it under the terms of the GNU General Public License as published by 18 * the Free Software Foundation; either version 2 of the License, or 19 * (at your option) any later version. 20 * 21 */ 22 23 /* I think it would be in everyone's best interest to follow this 24 * guidelines when writing PDC wrappers: 25 * 26 * - the name of the pdc wrapper should match one of the macros 27 * used for the first two arguments 28 * - don't use caps for random parts of the name 29 * - use the static PDC result buffers and "copyout" to structs 30 * supplied by the caller to encapsulate alignment restrictions 31 * - hold pdc_lock while in PDC or using static result buffers 32 * - use __pa() to convert virtual (kernel) pointers to physical 33 * ones. 34 * - the name of the struct used for pdc return values should equal 35 * one of the macros used for the first two arguments to the 36 * corresponding PDC call 37 * - keep the order of arguments 38 * - don't be smart (setting trailing NUL bytes for strings, return 39 * something useful even if the call failed) unless you are sure 40 * it's not going to affect functionality or performance 41 * 42 * Example: 43 * int pdc_cache_info(struct pdc_cache_info *cache_info ) 44 * { 45 * int retval; 46 * 47 * spin_lock_irq(&pdc_lock); 48 * retval = mem_pdc_call(PDC_CACHE,PDC_CACHE_INFO,__pa(cache_info),0); 49 * convert_to_wide(pdc_result); 50 * memcpy(cache_info, pdc_result, sizeof(*cache_info)); 51 * spin_unlock_irq(&pdc_lock); 52 * 53 * return retval; 54 * } 55 * prumpf 991016 56 */ 57 58 #include <stdarg.h> 59 60 #include <linux/delay.h> 61 #include <linux/init.h> 62 #include <linux/kernel.h> 63 #include <linux/module.h> 64 #include <linux/string.h> 65 #include <linux/spinlock.h> 66 67 #include <asm/page.h> 68 #include <asm/pdc.h> 69 #include <asm/pdcpat.h> 70 #include <asm/processor.h> /* for boot_cpu_data */ 71 72 #if defined(BOOTLOADER) 73 # undef spin_lock_irqsave 74 # define spin_lock_irqsave(a, b) { b = 1; } 75 # undef spin_unlock_irqrestore 76 # define spin_unlock_irqrestore(a, b) 77 #else 78 static DEFINE_SPINLOCK(pdc_lock); 79 #endif 80 81 extern unsigned long pdc_result[NUM_PDC_RESULT]; 82 extern unsigned long pdc_result2[NUM_PDC_RESULT]; 83 84 #ifdef CONFIG_64BIT 85 #define WIDE_FIRMWARE 0x1 86 #define NARROW_FIRMWARE 0x2 87 88 /* Firmware needs to be initially set to narrow to determine the 89 * actual firmware width. */ 90 int parisc_narrow_firmware __read_mostly = 1; 91 #endif 92 93 /* On most currently-supported platforms, IODC I/O calls are 32-bit calls 94 * and MEM_PDC calls are always the same width as the OS. 95 * Some PAT boxes may have 64-bit IODC I/O. 96 * 97 * Ryan Bradetich added the now obsolete CONFIG_PDC_NARROW to allow 98 * 64-bit kernels to run on systems with 32-bit MEM_PDC calls. 99 * This allowed wide kernels to run on Cxxx boxes. 100 * We now detect 32-bit-only PDC and dynamically switch to 32-bit mode 101 * when running a 64-bit kernel on such boxes (e.g. C200 or C360). 102 */ 103 104 #ifdef CONFIG_64BIT 105 long real64_call(unsigned long function, ...); 106 #endif 107 long real32_call(unsigned long function, ...); 108 109 #ifdef CONFIG_64BIT 110 # define MEM_PDC (unsigned long)(PAGE0->mem_pdc_hi) << 32 | PAGE0->mem_pdc 111 # define mem_pdc_call(args...) unlikely(parisc_narrow_firmware) ? real32_call(MEM_PDC, args) : real64_call(MEM_PDC, args) 112 #else 113 # define MEM_PDC (unsigned long)PAGE0->mem_pdc 114 # define mem_pdc_call(args...) real32_call(MEM_PDC, args) 115 #endif 116 117 118 /** 119 * f_extend - Convert PDC addresses to kernel addresses. 120 * @address: Address returned from PDC. 121 * 122 * This function is used to convert PDC addresses into kernel addresses 123 * when the PDC address size and kernel address size are different. 124 */ 125 static unsigned long f_extend(unsigned long address) 126 { 127 #ifdef CONFIG_64BIT 128 if(unlikely(parisc_narrow_firmware)) { 129 if((address & 0xff000000) == 0xf0000000) 130 return 0xf0f0f0f000000000UL | (u32)address; 131 132 if((address & 0xf0000000) == 0xf0000000) 133 return 0xffffffff00000000UL | (u32)address; 134 } 135 #endif 136 return address; 137 } 138 139 /** 140 * convert_to_wide - Convert the return buffer addresses into kernel addresses. 141 * @address: The return buffer from PDC. 142 * 143 * This function is used to convert the return buffer addresses retrieved from PDC 144 * into kernel addresses when the PDC address size and kernel address size are 145 * different. 146 */ 147 static void convert_to_wide(unsigned long *addr) 148 { 149 #ifdef CONFIG_64BIT 150 int i; 151 unsigned int *p = (unsigned int *)addr; 152 153 if (unlikely(parisc_narrow_firmware)) { 154 for (i = (NUM_PDC_RESULT-1); i >= 0; --i) 155 addr[i] = p[i]; 156 } 157 #endif 158 } 159 160 #ifdef CONFIG_64BIT 161 void set_firmware_width_unlocked(void) 162 { 163 int ret; 164 165 ret = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES, 166 __pa(pdc_result), 0); 167 convert_to_wide(pdc_result); 168 if (pdc_result[0] != NARROW_FIRMWARE) 169 parisc_narrow_firmware = 0; 170 } 171 172 /** 173 * set_firmware_width - Determine if the firmware is wide or narrow. 174 * 175 * This function must be called before any pdc_* function that uses the 176 * convert_to_wide function. 177 */ 178 void set_firmware_width(void) 179 { 180 unsigned long flags; 181 spin_lock_irqsave(&pdc_lock, flags); 182 set_firmware_width_unlocked(); 183 spin_unlock_irqrestore(&pdc_lock, flags); 184 } 185 #else 186 void set_firmware_width_unlocked(void) 187 { 188 return; 189 } 190 191 void set_firmware_width(void) 192 { 193 return; 194 } 195 #endif /*CONFIG_64BIT*/ 196 197 198 #if !defined(BOOTLOADER) 199 /** 200 * pdc_emergency_unlock - Unlock the linux pdc lock 201 * 202 * This call unlocks the linux pdc lock in case we need some PDC functions 203 * (like pdc_add_valid) during kernel stack dump. 204 */ 205 void pdc_emergency_unlock(void) 206 { 207 /* Spinlock DEBUG code freaks out if we unconditionally unlock */ 208 if (spin_is_locked(&pdc_lock)) 209 spin_unlock(&pdc_lock); 210 } 211 212 213 /** 214 * pdc_add_valid - Verify address can be accessed without causing a HPMC. 215 * @address: Address to be verified. 216 * 217 * This PDC call attempts to read from the specified address and verifies 218 * if the address is valid. 219 * 220 * The return value is PDC_OK (0) in case accessing this address is valid. 221 */ 222 int pdc_add_valid(unsigned long address) 223 { 224 int retval; 225 unsigned long flags; 226 227 spin_lock_irqsave(&pdc_lock, flags); 228 retval = mem_pdc_call(PDC_ADD_VALID, PDC_ADD_VALID_VERIFY, address); 229 spin_unlock_irqrestore(&pdc_lock, flags); 230 231 return retval; 232 } 233 EXPORT_SYMBOL(pdc_add_valid); 234 235 /** 236 * pdc_chassis_info - Return chassis information. 237 * @result: The return buffer. 238 * @chassis_info: The memory buffer address. 239 * @len: The size of the memory buffer address. 240 * 241 * An HVERSION dependent call for returning the chassis information. 242 */ 243 int __init pdc_chassis_info(struct pdc_chassis_info *chassis_info, void *led_info, unsigned long len) 244 { 245 int retval; 246 unsigned long flags; 247 248 spin_lock_irqsave(&pdc_lock, flags); 249 memcpy(&pdc_result, chassis_info, sizeof(*chassis_info)); 250 memcpy(&pdc_result2, led_info, len); 251 retval = mem_pdc_call(PDC_CHASSIS, PDC_RETURN_CHASSIS_INFO, 252 __pa(pdc_result), __pa(pdc_result2), len); 253 memcpy(chassis_info, pdc_result, sizeof(*chassis_info)); 254 memcpy(led_info, pdc_result2, len); 255 spin_unlock_irqrestore(&pdc_lock, flags); 256 257 return retval; 258 } 259 260 /** 261 * pdc_pat_chassis_send_log - Sends a PDC PAT CHASSIS log message. 262 * @retval: -1 on error, 0 on success. Other value are PDC errors 263 * 264 * Must be correctly formatted or expect system crash 265 */ 266 #ifdef CONFIG_64BIT 267 int pdc_pat_chassis_send_log(unsigned long state, unsigned long data) 268 { 269 int retval = 0; 270 unsigned long flags; 271 272 if (!is_pdc_pat()) 273 return -1; 274 275 spin_lock_irqsave(&pdc_lock, flags); 276 retval = mem_pdc_call(PDC_PAT_CHASSIS_LOG, PDC_PAT_CHASSIS_WRITE_LOG, __pa(&state), __pa(&data)); 277 spin_unlock_irqrestore(&pdc_lock, flags); 278 279 return retval; 280 } 281 #endif 282 283 /** 284 * pdc_chassis_disp - Updates chassis code 285 * @retval: -1 on error, 0 on success 286 */ 287 int pdc_chassis_disp(unsigned long disp) 288 { 289 int retval = 0; 290 unsigned long flags; 291 292 spin_lock_irqsave(&pdc_lock, flags); 293 retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_DISP, disp); 294 spin_unlock_irqrestore(&pdc_lock, flags); 295 296 return retval; 297 } 298 299 /** 300 * pdc_chassis_warn - Fetches chassis warnings 301 * @retval: -1 on error, 0 on success 302 */ 303 int pdc_chassis_warn(unsigned long *warn) 304 { 305 int retval = 0; 306 unsigned long flags; 307 308 spin_lock_irqsave(&pdc_lock, flags); 309 retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_WARN, __pa(pdc_result)); 310 *warn = pdc_result[0]; 311 spin_unlock_irqrestore(&pdc_lock, flags); 312 313 return retval; 314 } 315 316 int pdc_coproc_cfg_unlocked(struct pdc_coproc_cfg *pdc_coproc_info) 317 { 318 int ret; 319 320 ret = mem_pdc_call(PDC_COPROC, PDC_COPROC_CFG, __pa(pdc_result)); 321 convert_to_wide(pdc_result); 322 pdc_coproc_info->ccr_functional = pdc_result[0]; 323 pdc_coproc_info->ccr_present = pdc_result[1]; 324 pdc_coproc_info->revision = pdc_result[17]; 325 pdc_coproc_info->model = pdc_result[18]; 326 327 return ret; 328 } 329 330 /** 331 * pdc_coproc_cfg - To identify coprocessors attached to the processor. 332 * @pdc_coproc_info: Return buffer address. 333 * 334 * This PDC call returns the presence and status of all the coprocessors 335 * attached to the processor. 336 */ 337 int pdc_coproc_cfg(struct pdc_coproc_cfg *pdc_coproc_info) 338 { 339 int ret; 340 unsigned long flags; 341 342 spin_lock_irqsave(&pdc_lock, flags); 343 ret = pdc_coproc_cfg_unlocked(pdc_coproc_info); 344 spin_unlock_irqrestore(&pdc_lock, flags); 345 346 return ret; 347 } 348 349 /** 350 * pdc_iodc_read - Read data from the modules IODC. 351 * @actcnt: The actual number of bytes. 352 * @hpa: The HPA of the module for the iodc read. 353 * @index: The iodc entry point. 354 * @iodc_data: A buffer memory for the iodc options. 355 * @iodc_data_size: Size of the memory buffer. 356 * 357 * This PDC call reads from the IODC of the module specified by the hpa 358 * argument. 359 */ 360 int pdc_iodc_read(unsigned long *actcnt, unsigned long hpa, unsigned int index, 361 void *iodc_data, unsigned int iodc_data_size) 362 { 363 int retval; 364 unsigned long flags; 365 366 spin_lock_irqsave(&pdc_lock, flags); 367 retval = mem_pdc_call(PDC_IODC, PDC_IODC_READ, __pa(pdc_result), hpa, 368 index, __pa(pdc_result2), iodc_data_size); 369 convert_to_wide(pdc_result); 370 *actcnt = pdc_result[0]; 371 memcpy(iodc_data, pdc_result2, iodc_data_size); 372 spin_unlock_irqrestore(&pdc_lock, flags); 373 374 return retval; 375 } 376 EXPORT_SYMBOL(pdc_iodc_read); 377 378 /** 379 * pdc_system_map_find_mods - Locate unarchitected modules. 380 * @pdc_mod_info: Return buffer address. 381 * @mod_path: pointer to dev path structure. 382 * @mod_index: fixed address module index. 383 * 384 * To locate and identify modules which reside at fixed I/O addresses, which 385 * do not self-identify via architected bus walks. 386 */ 387 int pdc_system_map_find_mods(struct pdc_system_map_mod_info *pdc_mod_info, 388 struct pdc_module_path *mod_path, long mod_index) 389 { 390 int retval; 391 unsigned long flags; 392 393 spin_lock_irqsave(&pdc_lock, flags); 394 retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_MODULE, __pa(pdc_result), 395 __pa(pdc_result2), mod_index); 396 convert_to_wide(pdc_result); 397 memcpy(pdc_mod_info, pdc_result, sizeof(*pdc_mod_info)); 398 memcpy(mod_path, pdc_result2, sizeof(*mod_path)); 399 spin_unlock_irqrestore(&pdc_lock, flags); 400 401 pdc_mod_info->mod_addr = f_extend(pdc_mod_info->mod_addr); 402 return retval; 403 } 404 405 /** 406 * pdc_system_map_find_addrs - Retrieve additional address ranges. 407 * @pdc_addr_info: Return buffer address. 408 * @mod_index: Fixed address module index. 409 * @addr_index: Address range index. 410 * 411 * Retrieve additional information about subsequent address ranges for modules 412 * with multiple address ranges. 413 */ 414 int pdc_system_map_find_addrs(struct pdc_system_map_addr_info *pdc_addr_info, 415 long mod_index, long addr_index) 416 { 417 int retval; 418 unsigned long flags; 419 420 spin_lock_irqsave(&pdc_lock, flags); 421 retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_ADDRESS, __pa(pdc_result), 422 mod_index, addr_index); 423 convert_to_wide(pdc_result); 424 memcpy(pdc_addr_info, pdc_result, sizeof(*pdc_addr_info)); 425 spin_unlock_irqrestore(&pdc_lock, flags); 426 427 pdc_addr_info->mod_addr = f_extend(pdc_addr_info->mod_addr); 428 return retval; 429 } 430 431 /** 432 * pdc_model_info - Return model information about the processor. 433 * @model: The return buffer. 434 * 435 * Returns the version numbers, identifiers, and capabilities from the processor module. 436 */ 437 int pdc_model_info(struct pdc_model *model) 438 { 439 int retval; 440 unsigned long flags; 441 442 spin_lock_irqsave(&pdc_lock, flags); 443 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_INFO, __pa(pdc_result), 0); 444 convert_to_wide(pdc_result); 445 memcpy(model, pdc_result, sizeof(*model)); 446 spin_unlock_irqrestore(&pdc_lock, flags); 447 448 return retval; 449 } 450 451 /** 452 * pdc_model_sysmodel - Get the system model name. 453 * @name: A char array of at least 81 characters. 454 * 455 * Get system model name from PDC ROM (e.g. 9000/715 or 9000/778/B160L). 456 * Using OS_ID_HPUX will return the equivalent of the 'modelname' command 457 * on HP/UX. 458 */ 459 int pdc_model_sysmodel(char *name) 460 { 461 int retval; 462 unsigned long flags; 463 464 spin_lock_irqsave(&pdc_lock, flags); 465 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_SYSMODEL, __pa(pdc_result), 466 OS_ID_HPUX, __pa(name)); 467 convert_to_wide(pdc_result); 468 469 if (retval == PDC_OK) { 470 name[pdc_result[0]] = '\0'; /* add trailing '\0' */ 471 } else { 472 name[0] = 0; 473 } 474 spin_unlock_irqrestore(&pdc_lock, flags); 475 476 return retval; 477 } 478 479 /** 480 * pdc_model_versions - Identify the version number of each processor. 481 * @cpu_id: The return buffer. 482 * @id: The id of the processor to check. 483 * 484 * Returns the version number for each processor component. 485 * 486 * This comment was here before, but I do not know what it means :( -RB 487 * id: 0 = cpu revision, 1 = boot-rom-version 488 */ 489 int pdc_model_versions(unsigned long *versions, int id) 490 { 491 int retval; 492 unsigned long flags; 493 494 spin_lock_irqsave(&pdc_lock, flags); 495 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_VERSIONS, __pa(pdc_result), id); 496 convert_to_wide(pdc_result); 497 *versions = pdc_result[0]; 498 spin_unlock_irqrestore(&pdc_lock, flags); 499 500 return retval; 501 } 502 503 /** 504 * pdc_model_cpuid - Returns the CPU_ID. 505 * @cpu_id: The return buffer. 506 * 507 * Returns the CPU_ID value which uniquely identifies the cpu portion of 508 * the processor module. 509 */ 510 int pdc_model_cpuid(unsigned long *cpu_id) 511 { 512 int retval; 513 unsigned long flags; 514 515 spin_lock_irqsave(&pdc_lock, flags); 516 pdc_result[0] = 0; /* preset zero (call may not be implemented!) */ 517 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CPU_ID, __pa(pdc_result), 0); 518 convert_to_wide(pdc_result); 519 *cpu_id = pdc_result[0]; 520 spin_unlock_irqrestore(&pdc_lock, flags); 521 522 return retval; 523 } 524 525 /** 526 * pdc_model_capabilities - Returns the platform capabilities. 527 * @capabilities: The return buffer. 528 * 529 * Returns information about platform support for 32- and/or 64-bit 530 * OSes, IO-PDIR coherency, and virtual aliasing. 531 */ 532 int pdc_model_capabilities(unsigned long *capabilities) 533 { 534 int retval; 535 unsigned long flags; 536 537 spin_lock_irqsave(&pdc_lock, flags); 538 pdc_result[0] = 0; /* preset zero (call may not be implemented!) */ 539 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES, __pa(pdc_result), 0); 540 convert_to_wide(pdc_result); 541 if (retval == PDC_OK) { 542 *capabilities = pdc_result[0]; 543 } else { 544 *capabilities = PDC_MODEL_OS32; 545 } 546 spin_unlock_irqrestore(&pdc_lock, flags); 547 548 return retval; 549 } 550 551 /** 552 * pdc_cache_info - Return cache and TLB information. 553 * @cache_info: The return buffer. 554 * 555 * Returns information about the processor's cache and TLB. 556 */ 557 int pdc_cache_info(struct pdc_cache_info *cache_info) 558 { 559 int retval; 560 unsigned long flags; 561 562 spin_lock_irqsave(&pdc_lock, flags); 563 retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_INFO, __pa(pdc_result), 0); 564 convert_to_wide(pdc_result); 565 memcpy(cache_info, pdc_result, sizeof(*cache_info)); 566 spin_unlock_irqrestore(&pdc_lock, flags); 567 568 return retval; 569 } 570 571 /** 572 * pdc_spaceid_bits - Return whether Space ID hashing is turned on. 573 * @space_bits: Should be 0, if not, bad mojo! 574 * 575 * Returns information about Space ID hashing. 576 */ 577 int pdc_spaceid_bits(unsigned long *space_bits) 578 { 579 int retval; 580 unsigned long flags; 581 582 spin_lock_irqsave(&pdc_lock, flags); 583 pdc_result[0] = 0; 584 retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_RET_SPID, __pa(pdc_result), 0); 585 convert_to_wide(pdc_result); 586 *space_bits = pdc_result[0]; 587 spin_unlock_irqrestore(&pdc_lock, flags); 588 589 return retval; 590 } 591 592 #ifndef CONFIG_PA20 593 /** 594 * pdc_btlb_info - Return block TLB information. 595 * @btlb: The return buffer. 596 * 597 * Returns information about the hardware Block TLB. 598 */ 599 int pdc_btlb_info(struct pdc_btlb_info *btlb) 600 { 601 int retval; 602 unsigned long flags; 603 604 spin_lock_irqsave(&pdc_lock, flags); 605 retval = mem_pdc_call(PDC_BLOCK_TLB, PDC_BTLB_INFO, __pa(pdc_result), 0); 606 memcpy(btlb, pdc_result, sizeof(*btlb)); 607 spin_unlock_irqrestore(&pdc_lock, flags); 608 609 if(retval < 0) { 610 btlb->max_size = 0; 611 } 612 return retval; 613 } 614 615 /** 616 * pdc_mem_map_hpa - Find fixed module information. 617 * @address: The return buffer 618 * @mod_path: pointer to dev path structure. 619 * 620 * This call was developed for S700 workstations to allow the kernel to find 621 * the I/O devices (Core I/O). In the future (Kittyhawk and beyond) this 622 * call will be replaced (on workstations) by the architected PDC_SYSTEM_MAP 623 * call. 624 * 625 * This call is supported by all existing S700 workstations (up to Gecko). 626 */ 627 int pdc_mem_map_hpa(struct pdc_memory_map *address, 628 struct pdc_module_path *mod_path) 629 { 630 int retval; 631 unsigned long flags; 632 633 spin_lock_irqsave(&pdc_lock, flags); 634 memcpy(pdc_result2, mod_path, sizeof(*mod_path)); 635 retval = mem_pdc_call(PDC_MEM_MAP, PDC_MEM_MAP_HPA, __pa(pdc_result), 636 __pa(pdc_result2)); 637 memcpy(address, pdc_result, sizeof(*address)); 638 spin_unlock_irqrestore(&pdc_lock, flags); 639 640 return retval; 641 } 642 #endif /* !CONFIG_PA20 */ 643 644 /** 645 * pdc_lan_station_id - Get the LAN address. 646 * @lan_addr: The return buffer. 647 * @hpa: The network device HPA. 648 * 649 * Get the LAN station address when it is not directly available from the LAN hardware. 650 */ 651 int pdc_lan_station_id(char *lan_addr, unsigned long hpa) 652 { 653 int retval; 654 unsigned long flags; 655 656 spin_lock_irqsave(&pdc_lock, flags); 657 retval = mem_pdc_call(PDC_LAN_STATION_ID, PDC_LAN_STATION_ID_READ, 658 __pa(pdc_result), hpa); 659 if (retval < 0) { 660 /* FIXME: else read MAC from NVRAM */ 661 memset(lan_addr, 0, PDC_LAN_STATION_ID_SIZE); 662 } else { 663 memcpy(lan_addr, pdc_result, PDC_LAN_STATION_ID_SIZE); 664 } 665 spin_unlock_irqrestore(&pdc_lock, flags); 666 667 return retval; 668 } 669 EXPORT_SYMBOL(pdc_lan_station_id); 670 671 /** 672 * pdc_stable_read - Read data from Stable Storage. 673 * @staddr: Stable Storage address to access. 674 * @memaddr: The memory address where Stable Storage data shall be copied. 675 * @count: number of bytes to transfer. count is multiple of 4. 676 * 677 * This PDC call reads from the Stable Storage address supplied in staddr 678 * and copies count bytes to the memory address memaddr. 679 * The call will fail if staddr+count > PDC_STABLE size. 680 */ 681 int pdc_stable_read(unsigned long staddr, void *memaddr, unsigned long count) 682 { 683 int retval; 684 unsigned long flags; 685 686 spin_lock_irqsave(&pdc_lock, flags); 687 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_READ, staddr, 688 __pa(pdc_result), count); 689 convert_to_wide(pdc_result); 690 memcpy(memaddr, pdc_result, count); 691 spin_unlock_irqrestore(&pdc_lock, flags); 692 693 return retval; 694 } 695 EXPORT_SYMBOL(pdc_stable_read); 696 697 /** 698 * pdc_stable_write - Write data to Stable Storage. 699 * @staddr: Stable Storage address to access. 700 * @memaddr: The memory address where Stable Storage data shall be read from. 701 * @count: number of bytes to transfer. count is multiple of 4. 702 * 703 * This PDC call reads count bytes from the supplied memaddr address, 704 * and copies count bytes to the Stable Storage address staddr. 705 * The call will fail if staddr+count > PDC_STABLE size. 706 */ 707 int pdc_stable_write(unsigned long staddr, void *memaddr, unsigned long count) 708 { 709 int retval; 710 unsigned long flags; 711 712 spin_lock_irqsave(&pdc_lock, flags); 713 memcpy(pdc_result, memaddr, count); 714 convert_to_wide(pdc_result); 715 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_WRITE, staddr, 716 __pa(pdc_result), count); 717 spin_unlock_irqrestore(&pdc_lock, flags); 718 719 return retval; 720 } 721 EXPORT_SYMBOL(pdc_stable_write); 722 723 /** 724 * pdc_stable_get_size - Get Stable Storage size in bytes. 725 * @size: pointer where the size will be stored. 726 * 727 * This PDC call returns the number of bytes in the processor's Stable 728 * Storage, which is the number of contiguous bytes implemented in Stable 729 * Storage starting from staddr=0. size in an unsigned 64-bit integer 730 * which is a multiple of four. 731 */ 732 int pdc_stable_get_size(unsigned long *size) 733 { 734 int retval; 735 unsigned long flags; 736 737 spin_lock_irqsave(&pdc_lock, flags); 738 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_RETURN_SIZE, __pa(pdc_result)); 739 *size = pdc_result[0]; 740 spin_unlock_irqrestore(&pdc_lock, flags); 741 742 return retval; 743 } 744 EXPORT_SYMBOL(pdc_stable_get_size); 745 746 /** 747 * pdc_stable_verify_contents - Checks that Stable Storage contents are valid. 748 * 749 * This PDC call is meant to be used to check the integrity of the current 750 * contents of Stable Storage. 751 */ 752 int pdc_stable_verify_contents(void) 753 { 754 int retval; 755 unsigned long flags; 756 757 spin_lock_irqsave(&pdc_lock, flags); 758 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_VERIFY_CONTENTS); 759 spin_unlock_irqrestore(&pdc_lock, flags); 760 761 return retval; 762 } 763 EXPORT_SYMBOL(pdc_stable_verify_contents); 764 765 /** 766 * pdc_stable_initialize - Sets Stable Storage contents to zero and initialize 767 * the validity indicator. 768 * 769 * This PDC call will erase all contents of Stable Storage. Use with care! 770 */ 771 int pdc_stable_initialize(void) 772 { 773 int retval; 774 unsigned long flags; 775 776 spin_lock_irqsave(&pdc_lock, flags); 777 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_INITIALIZE); 778 spin_unlock_irqrestore(&pdc_lock, flags); 779 780 return retval; 781 } 782 EXPORT_SYMBOL(pdc_stable_initialize); 783 784 /** 785 * pdc_get_initiator - Get the SCSI Interface Card params (SCSI ID, SDTR, SE or LVD) 786 * @hwpath: fully bc.mod style path to the device. 787 * @initiator: the array to return the result into 788 * 789 * Get the SCSI operational parameters from PDC. 790 * Needed since HPUX never used BIOS or symbios card NVRAM. 791 * Most ncr/sym cards won't have an entry and just use whatever 792 * capabilities of the card are (eg Ultra, LVD). But there are 793 * several cases where it's useful: 794 * o set SCSI id for Multi-initiator clusters, 795 * o cable too long (ie SE scsi 10Mhz won't support 6m length), 796 * o bus width exported is less than what the interface chip supports. 797 */ 798 int pdc_get_initiator(struct hardware_path *hwpath, struct pdc_initiator *initiator) 799 { 800 int retval; 801 unsigned long flags; 802 803 spin_lock_irqsave(&pdc_lock, flags); 804 805 /* BCJ-XXXX series boxes. E.G. "9000/785/C3000" */ 806 #define IS_SPROCKETS() (strlen(boot_cpu_data.pdc.sys_model_name) == 14 && \ 807 strncmp(boot_cpu_data.pdc.sys_model_name, "9000/785", 8) == 0) 808 809 retval = mem_pdc_call(PDC_INITIATOR, PDC_GET_INITIATOR, 810 __pa(pdc_result), __pa(hwpath)); 811 if (retval < PDC_OK) 812 goto out; 813 814 if (pdc_result[0] < 16) { 815 initiator->host_id = pdc_result[0]; 816 } else { 817 initiator->host_id = -1; 818 } 819 820 /* 821 * Sprockets and Piranha return 20 or 40 (MT/s). Prelude returns 822 * 1, 2, 5 or 10 for 5, 10, 20 or 40 MT/s, respectively 823 */ 824 switch (pdc_result[1]) { 825 case 1: initiator->factor = 50; break; 826 case 2: initiator->factor = 25; break; 827 case 5: initiator->factor = 12; break; 828 case 25: initiator->factor = 10; break; 829 case 20: initiator->factor = 12; break; 830 case 40: initiator->factor = 10; break; 831 default: initiator->factor = -1; break; 832 } 833 834 if (IS_SPROCKETS()) { 835 initiator->width = pdc_result[4]; 836 initiator->mode = pdc_result[5]; 837 } else { 838 initiator->width = -1; 839 initiator->mode = -1; 840 } 841 842 out: 843 spin_unlock_irqrestore(&pdc_lock, flags); 844 845 return (retval >= PDC_OK); 846 } 847 EXPORT_SYMBOL(pdc_get_initiator); 848 849 850 /** 851 * pdc_pci_irt_size - Get the number of entries in the interrupt routing table. 852 * @num_entries: The return value. 853 * @hpa: The HPA for the device. 854 * 855 * This PDC function returns the number of entries in the specified cell's 856 * interrupt table. 857 * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes 858 */ 859 int pdc_pci_irt_size(unsigned long *num_entries, unsigned long hpa) 860 { 861 int retval; 862 unsigned long flags; 863 864 spin_lock_irqsave(&pdc_lock, flags); 865 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL_SIZE, 866 __pa(pdc_result), hpa); 867 convert_to_wide(pdc_result); 868 *num_entries = pdc_result[0]; 869 spin_unlock_irqrestore(&pdc_lock, flags); 870 871 return retval; 872 } 873 874 /** 875 * pdc_pci_irt - Get the PCI interrupt routing table. 876 * @num_entries: The number of entries in the table. 877 * @hpa: The Hard Physical Address of the device. 878 * @tbl: 879 * 880 * Get the PCI interrupt routing table for the device at the given HPA. 881 * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes 882 */ 883 int pdc_pci_irt(unsigned long num_entries, unsigned long hpa, void *tbl) 884 { 885 int retval; 886 unsigned long flags; 887 888 BUG_ON((unsigned long)tbl & 0x7); 889 890 spin_lock_irqsave(&pdc_lock, flags); 891 pdc_result[0] = num_entries; 892 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL, 893 __pa(pdc_result), hpa, __pa(tbl)); 894 spin_unlock_irqrestore(&pdc_lock, flags); 895 896 return retval; 897 } 898 899 900 #if 0 /* UNTEST CODE - left here in case someone needs it */ 901 902 /** 903 * pdc_pci_config_read - read PCI config space. 904 * @hpa token from PDC to indicate which PCI device 905 * @pci_addr configuration space address to read from 906 * 907 * Read PCI Configuration space *before* linux PCI subsystem is running. 908 */ 909 unsigned int pdc_pci_config_read(void *hpa, unsigned long cfg_addr) 910 { 911 int retval; 912 unsigned long flags; 913 914 spin_lock_irqsave(&pdc_lock, flags); 915 pdc_result[0] = 0; 916 pdc_result[1] = 0; 917 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_READ_CONFIG, 918 __pa(pdc_result), hpa, cfg_addr&~3UL, 4UL); 919 spin_unlock_irqrestore(&pdc_lock, flags); 920 921 return retval ? ~0 : (unsigned int) pdc_result[0]; 922 } 923 924 925 /** 926 * pdc_pci_config_write - read PCI config space. 927 * @hpa token from PDC to indicate which PCI device 928 * @pci_addr configuration space address to write 929 * @val value we want in the 32-bit register 930 * 931 * Write PCI Configuration space *before* linux PCI subsystem is running. 932 */ 933 void pdc_pci_config_write(void *hpa, unsigned long cfg_addr, unsigned int val) 934 { 935 int retval; 936 unsigned long flags; 937 938 spin_lock_irqsave(&pdc_lock, flags); 939 pdc_result[0] = 0; 940 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_WRITE_CONFIG, 941 __pa(pdc_result), hpa, 942 cfg_addr&~3UL, 4UL, (unsigned long) val); 943 spin_unlock_irqrestore(&pdc_lock, flags); 944 945 return retval; 946 } 947 #endif /* UNTESTED CODE */ 948 949 /** 950 * pdc_tod_read - Read the Time-Of-Day clock. 951 * @tod: The return buffer: 952 * 953 * Read the Time-Of-Day clock 954 */ 955 int pdc_tod_read(struct pdc_tod *tod) 956 { 957 int retval; 958 unsigned long flags; 959 960 spin_lock_irqsave(&pdc_lock, flags); 961 retval = mem_pdc_call(PDC_TOD, PDC_TOD_READ, __pa(pdc_result), 0); 962 convert_to_wide(pdc_result); 963 memcpy(tod, pdc_result, sizeof(*tod)); 964 spin_unlock_irqrestore(&pdc_lock, flags); 965 966 return retval; 967 } 968 EXPORT_SYMBOL(pdc_tod_read); 969 970 int pdc_mem_pdt_info(struct pdc_mem_retinfo *rinfo) 971 { 972 int retval; 973 unsigned long flags; 974 975 spin_lock_irqsave(&pdc_lock, flags); 976 retval = mem_pdc_call(PDC_MEM, PDC_MEM_MEMINFO, __pa(pdc_result), 0); 977 convert_to_wide(pdc_result); 978 memcpy(rinfo, pdc_result, sizeof(*rinfo)); 979 spin_unlock_irqrestore(&pdc_lock, flags); 980 981 return retval; 982 } 983 984 int pdc_mem_pdt_read_entries(struct pdc_mem_read_pdt *pret, 985 unsigned long *pdt_entries_ptr) 986 { 987 int retval; 988 unsigned long flags; 989 990 spin_lock_irqsave(&pdc_lock, flags); 991 retval = mem_pdc_call(PDC_MEM, PDC_MEM_READ_PDT, __pa(pdc_result), 992 __pa(pdt_entries_ptr)); 993 if (retval == PDC_OK) { 994 convert_to_wide(pdc_result); 995 memcpy(pret, pdc_result, sizeof(*pret)); 996 } 997 spin_unlock_irqrestore(&pdc_lock, flags); 998 999 #ifdef CONFIG_64BIT 1000 /* 1001 * 64-bit kernels should not call this PDT function in narrow mode. 1002 * The pdt_entries_ptr array above will now contain 32-bit values 1003 */ 1004 if (WARN_ON_ONCE((retval == PDC_OK) && parisc_narrow_firmware)) 1005 return PDC_ERROR; 1006 #endif 1007 1008 return retval; 1009 } 1010 1011 /** 1012 * pdc_tod_set - Set the Time-Of-Day clock. 1013 * @sec: The number of seconds since epoch. 1014 * @usec: The number of micro seconds. 1015 * 1016 * Set the Time-Of-Day clock. 1017 */ 1018 int pdc_tod_set(unsigned long sec, unsigned long usec) 1019 { 1020 int retval; 1021 unsigned long flags; 1022 1023 spin_lock_irqsave(&pdc_lock, flags); 1024 retval = mem_pdc_call(PDC_TOD, PDC_TOD_WRITE, sec, usec); 1025 spin_unlock_irqrestore(&pdc_lock, flags); 1026 1027 return retval; 1028 } 1029 EXPORT_SYMBOL(pdc_tod_set); 1030 1031 #ifdef CONFIG_64BIT 1032 int pdc_mem_mem_table(struct pdc_memory_table_raddr *r_addr, 1033 struct pdc_memory_table *tbl, unsigned long entries) 1034 { 1035 int retval; 1036 unsigned long flags; 1037 1038 spin_lock_irqsave(&pdc_lock, flags); 1039 retval = mem_pdc_call(PDC_MEM, PDC_MEM_TABLE, __pa(pdc_result), __pa(pdc_result2), entries); 1040 convert_to_wide(pdc_result); 1041 memcpy(r_addr, pdc_result, sizeof(*r_addr)); 1042 memcpy(tbl, pdc_result2, entries * sizeof(*tbl)); 1043 spin_unlock_irqrestore(&pdc_lock, flags); 1044 1045 return retval; 1046 } 1047 #endif /* CONFIG_64BIT */ 1048 1049 /* FIXME: Is this pdc used? I could not find type reference to ftc_bitmap 1050 * so I guessed at unsigned long. Someone who knows what this does, can fix 1051 * it later. :) 1052 */ 1053 int pdc_do_firm_test_reset(unsigned long ftc_bitmap) 1054 { 1055 int retval; 1056 unsigned long flags; 1057 1058 spin_lock_irqsave(&pdc_lock, flags); 1059 retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_FIRM_TEST_RESET, 1060 PDC_FIRM_TEST_MAGIC, ftc_bitmap); 1061 spin_unlock_irqrestore(&pdc_lock, flags); 1062 1063 return retval; 1064 } 1065 1066 /* 1067 * pdc_do_reset - Reset the system. 1068 * 1069 * Reset the system. 1070 */ 1071 int pdc_do_reset(void) 1072 { 1073 int retval; 1074 unsigned long flags; 1075 1076 spin_lock_irqsave(&pdc_lock, flags); 1077 retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_RESET); 1078 spin_unlock_irqrestore(&pdc_lock, flags); 1079 1080 return retval; 1081 } 1082 1083 /* 1084 * pdc_soft_power_info - Enable soft power switch. 1085 * @power_reg: address of soft power register 1086 * 1087 * Return the absolute address of the soft power switch register 1088 */ 1089 int __init pdc_soft_power_info(unsigned long *power_reg) 1090 { 1091 int retval; 1092 unsigned long flags; 1093 1094 *power_reg = (unsigned long) (-1); 1095 1096 spin_lock_irqsave(&pdc_lock, flags); 1097 retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_INFO, __pa(pdc_result), 0); 1098 if (retval == PDC_OK) { 1099 convert_to_wide(pdc_result); 1100 *power_reg = f_extend(pdc_result[0]); 1101 } 1102 spin_unlock_irqrestore(&pdc_lock, flags); 1103 1104 return retval; 1105 } 1106 1107 /* 1108 * pdc_soft_power_button - Control the soft power button behaviour 1109 * @sw_control: 0 for hardware control, 1 for software control 1110 * 1111 * 1112 * This PDC function places the soft power button under software or 1113 * hardware control. 1114 * Under software control the OS may control to when to allow to shut 1115 * down the system. Under hardware control pressing the power button 1116 * powers off the system immediately. 1117 */ 1118 int pdc_soft_power_button(int sw_control) 1119 { 1120 int retval; 1121 unsigned long flags; 1122 1123 spin_lock_irqsave(&pdc_lock, flags); 1124 retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_ENABLE, __pa(pdc_result), sw_control); 1125 spin_unlock_irqrestore(&pdc_lock, flags); 1126 1127 return retval; 1128 } 1129 1130 /* 1131 * pdc_io_reset - Hack to avoid overlapping range registers of Bridges devices. 1132 * Primarily a problem on T600 (which parisc-linux doesn't support) but 1133 * who knows what other platform firmware might do with this OS "hook". 1134 */ 1135 void pdc_io_reset(void) 1136 { 1137 unsigned long flags; 1138 1139 spin_lock_irqsave(&pdc_lock, flags); 1140 mem_pdc_call(PDC_IO, PDC_IO_RESET, 0); 1141 spin_unlock_irqrestore(&pdc_lock, flags); 1142 } 1143 1144 /* 1145 * pdc_io_reset_devices - Hack to Stop USB controller 1146 * 1147 * If PDC used the usb controller, the usb controller 1148 * is still running and will crash the machines during iommu 1149 * setup, because of still running DMA. This PDC call 1150 * stops the USB controller. 1151 * Normally called after calling pdc_io_reset(). 1152 */ 1153 void pdc_io_reset_devices(void) 1154 { 1155 unsigned long flags; 1156 1157 spin_lock_irqsave(&pdc_lock, flags); 1158 mem_pdc_call(PDC_IO, PDC_IO_RESET_DEVICES, 0); 1159 spin_unlock_irqrestore(&pdc_lock, flags); 1160 } 1161 1162 #endif /* defined(BOOTLOADER) */ 1163 1164 /* locked by pdc_console_lock */ 1165 static int __attribute__((aligned(8))) iodc_retbuf[32]; 1166 static char __attribute__((aligned(64))) iodc_dbuf[4096]; 1167 1168 /** 1169 * pdc_iodc_print - Console print using IODC. 1170 * @str: the string to output. 1171 * @count: length of str 1172 * 1173 * Note that only these special chars are architected for console IODC io: 1174 * BEL, BS, CR, and LF. Others are passed through. 1175 * Since the HP console requires CR+LF to perform a 'newline', we translate 1176 * "\n" to "\r\n". 1177 */ 1178 int pdc_iodc_print(const unsigned char *str, unsigned count) 1179 { 1180 unsigned int i; 1181 unsigned long flags; 1182 1183 for (i = 0; i < count;) { 1184 switch(str[i]) { 1185 case '\n': 1186 iodc_dbuf[i+0] = '\r'; 1187 iodc_dbuf[i+1] = '\n'; 1188 i += 2; 1189 goto print; 1190 default: 1191 iodc_dbuf[i] = str[i]; 1192 i++; 1193 break; 1194 } 1195 } 1196 1197 print: 1198 spin_lock_irqsave(&pdc_lock, flags); 1199 real32_call(PAGE0->mem_cons.iodc_io, 1200 (unsigned long)PAGE0->mem_cons.hpa, ENTRY_IO_COUT, 1201 PAGE0->mem_cons.spa, __pa(PAGE0->mem_cons.dp.layers), 1202 __pa(iodc_retbuf), 0, __pa(iodc_dbuf), i, 0); 1203 spin_unlock_irqrestore(&pdc_lock, flags); 1204 1205 return i; 1206 } 1207 1208 #if !defined(BOOTLOADER) 1209 /** 1210 * pdc_iodc_getc - Read a character (non-blocking) from the PDC console. 1211 * 1212 * Read a character (non-blocking) from the PDC console, returns -1 if 1213 * key is not present. 1214 */ 1215 int pdc_iodc_getc(void) 1216 { 1217 int ch; 1218 int status; 1219 unsigned long flags; 1220 1221 /* Bail if no console input device. */ 1222 if (!PAGE0->mem_kbd.iodc_io) 1223 return 0; 1224 1225 /* wait for a keyboard (rs232)-input */ 1226 spin_lock_irqsave(&pdc_lock, flags); 1227 real32_call(PAGE0->mem_kbd.iodc_io, 1228 (unsigned long)PAGE0->mem_kbd.hpa, ENTRY_IO_CIN, 1229 PAGE0->mem_kbd.spa, __pa(PAGE0->mem_kbd.dp.layers), 1230 __pa(iodc_retbuf), 0, __pa(iodc_dbuf), 1, 0); 1231 1232 ch = *iodc_dbuf; 1233 status = *iodc_retbuf; 1234 spin_unlock_irqrestore(&pdc_lock, flags); 1235 1236 if (status == 0) 1237 return -1; 1238 1239 return ch; 1240 } 1241 1242 int pdc_sti_call(unsigned long func, unsigned long flags, 1243 unsigned long inptr, unsigned long outputr, 1244 unsigned long glob_cfg) 1245 { 1246 int retval; 1247 unsigned long irqflags; 1248 1249 spin_lock_irqsave(&pdc_lock, irqflags); 1250 retval = real32_call(func, flags, inptr, outputr, glob_cfg); 1251 spin_unlock_irqrestore(&pdc_lock, irqflags); 1252 1253 return retval; 1254 } 1255 EXPORT_SYMBOL(pdc_sti_call); 1256 1257 #ifdef CONFIG_64BIT 1258 /** 1259 * pdc_pat_cell_get_number - Returns the cell number. 1260 * @cell_info: The return buffer. 1261 * 1262 * This PDC call returns the cell number of the cell from which the call 1263 * is made. 1264 */ 1265 int pdc_pat_cell_get_number(struct pdc_pat_cell_num *cell_info) 1266 { 1267 int retval; 1268 unsigned long flags; 1269 1270 spin_lock_irqsave(&pdc_lock, flags); 1271 retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_GET_NUMBER, __pa(pdc_result)); 1272 memcpy(cell_info, pdc_result, sizeof(*cell_info)); 1273 spin_unlock_irqrestore(&pdc_lock, flags); 1274 1275 return retval; 1276 } 1277 1278 /** 1279 * pdc_pat_cell_module - Retrieve the cell's module information. 1280 * @actcnt: The number of bytes written to mem_addr. 1281 * @ploc: The physical location. 1282 * @mod: The module index. 1283 * @view_type: The view of the address type. 1284 * @mem_addr: The return buffer. 1285 * 1286 * This PDC call returns information about each module attached to the cell 1287 * at the specified location. 1288 */ 1289 int pdc_pat_cell_module(unsigned long *actcnt, unsigned long ploc, unsigned long mod, 1290 unsigned long view_type, void *mem_addr) 1291 { 1292 int retval; 1293 unsigned long flags; 1294 static struct pdc_pat_cell_mod_maddr_block result __attribute__ ((aligned (8))); 1295 1296 spin_lock_irqsave(&pdc_lock, flags); 1297 retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_MODULE, __pa(pdc_result), 1298 ploc, mod, view_type, __pa(&result)); 1299 if(!retval) { 1300 *actcnt = pdc_result[0]; 1301 memcpy(mem_addr, &result, *actcnt); 1302 } 1303 spin_unlock_irqrestore(&pdc_lock, flags); 1304 1305 return retval; 1306 } 1307 1308 /** 1309 * pdc_pat_cpu_get_number - Retrieve the cpu number. 1310 * @cpu_info: The return buffer. 1311 * @hpa: The Hard Physical Address of the CPU. 1312 * 1313 * Retrieve the cpu number for the cpu at the specified HPA. 1314 */ 1315 int pdc_pat_cpu_get_number(struct pdc_pat_cpu_num *cpu_info, unsigned long hpa) 1316 { 1317 int retval; 1318 unsigned long flags; 1319 1320 spin_lock_irqsave(&pdc_lock, flags); 1321 retval = mem_pdc_call(PDC_PAT_CPU, PDC_PAT_CPU_GET_NUMBER, 1322 __pa(&pdc_result), hpa); 1323 memcpy(cpu_info, pdc_result, sizeof(*cpu_info)); 1324 spin_unlock_irqrestore(&pdc_lock, flags); 1325 1326 return retval; 1327 } 1328 1329 /** 1330 * pdc_pat_get_irt_size - Retrieve the number of entries in the cell's interrupt table. 1331 * @num_entries: The return value. 1332 * @cell_num: The target cell. 1333 * 1334 * This PDC function returns the number of entries in the specified cell's 1335 * interrupt table. 1336 */ 1337 int pdc_pat_get_irt_size(unsigned long *num_entries, unsigned long cell_num) 1338 { 1339 int retval; 1340 unsigned long flags; 1341 1342 spin_lock_irqsave(&pdc_lock, flags); 1343 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE_SIZE, 1344 __pa(pdc_result), cell_num); 1345 *num_entries = pdc_result[0]; 1346 spin_unlock_irqrestore(&pdc_lock, flags); 1347 1348 return retval; 1349 } 1350 1351 /** 1352 * pdc_pat_get_irt - Retrieve the cell's interrupt table. 1353 * @r_addr: The return buffer. 1354 * @cell_num: The target cell. 1355 * 1356 * This PDC function returns the actual interrupt table for the specified cell. 1357 */ 1358 int pdc_pat_get_irt(void *r_addr, unsigned long cell_num) 1359 { 1360 int retval; 1361 unsigned long flags; 1362 1363 spin_lock_irqsave(&pdc_lock, flags); 1364 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE, 1365 __pa(r_addr), cell_num); 1366 spin_unlock_irqrestore(&pdc_lock, flags); 1367 1368 return retval; 1369 } 1370 1371 /** 1372 * pdc_pat_pd_get_addr_map - Retrieve information about memory address ranges. 1373 * @actlen: The return buffer. 1374 * @mem_addr: Pointer to the memory buffer. 1375 * @count: The number of bytes to read from the buffer. 1376 * @offset: The offset with respect to the beginning of the buffer. 1377 * 1378 */ 1379 int pdc_pat_pd_get_addr_map(unsigned long *actual_len, void *mem_addr, 1380 unsigned long count, unsigned long offset) 1381 { 1382 int retval; 1383 unsigned long flags; 1384 1385 spin_lock_irqsave(&pdc_lock, flags); 1386 retval = mem_pdc_call(PDC_PAT_PD, PDC_PAT_PD_GET_ADDR_MAP, __pa(pdc_result), 1387 __pa(pdc_result2), count, offset); 1388 *actual_len = pdc_result[0]; 1389 memcpy(mem_addr, pdc_result2, *actual_len); 1390 spin_unlock_irqrestore(&pdc_lock, flags); 1391 1392 return retval; 1393 } 1394 1395 /** 1396 * pdc_pat_io_pci_cfg_read - Read PCI configuration space. 1397 * @pci_addr: PCI configuration space address for which the read request is being made. 1398 * @pci_size: Size of read in bytes. Valid values are 1, 2, and 4. 1399 * @mem_addr: Pointer to return memory buffer. 1400 * 1401 */ 1402 int pdc_pat_io_pci_cfg_read(unsigned long pci_addr, int pci_size, u32 *mem_addr) 1403 { 1404 int retval; 1405 unsigned long flags; 1406 1407 spin_lock_irqsave(&pdc_lock, flags); 1408 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_READ, 1409 __pa(pdc_result), pci_addr, pci_size); 1410 switch(pci_size) { 1411 case 1: *(u8 *) mem_addr = (u8) pdc_result[0]; break; 1412 case 2: *(u16 *)mem_addr = (u16) pdc_result[0]; break; 1413 case 4: *(u32 *)mem_addr = (u32) pdc_result[0]; break; 1414 } 1415 spin_unlock_irqrestore(&pdc_lock, flags); 1416 1417 return retval; 1418 } 1419 1420 /** 1421 * pdc_pat_io_pci_cfg_write - Retrieve information about memory address ranges. 1422 * @pci_addr: PCI configuration space address for which the write request is being made. 1423 * @pci_size: Size of write in bytes. Valid values are 1, 2, and 4. 1424 * @value: Pointer to 1, 2, or 4 byte value in low order end of argument to be 1425 * written to PCI Config space. 1426 * 1427 */ 1428 int pdc_pat_io_pci_cfg_write(unsigned long pci_addr, int pci_size, u32 val) 1429 { 1430 int retval; 1431 unsigned long flags; 1432 1433 spin_lock_irqsave(&pdc_lock, flags); 1434 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_WRITE, 1435 pci_addr, pci_size, val); 1436 spin_unlock_irqrestore(&pdc_lock, flags); 1437 1438 return retval; 1439 } 1440 1441 /** 1442 * pdc_pat_mem_pdc_info - Retrieve information about page deallocation table 1443 * @rinfo: memory pdt information 1444 * 1445 */ 1446 int pdc_pat_mem_pdt_info(struct pdc_pat_mem_retinfo *rinfo) 1447 { 1448 int retval; 1449 unsigned long flags; 1450 1451 spin_lock_irqsave(&pdc_lock, flags); 1452 retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_PD_INFO, 1453 __pa(&pdc_result)); 1454 if (retval == PDC_OK) 1455 memcpy(rinfo, &pdc_result, sizeof(*rinfo)); 1456 spin_unlock_irqrestore(&pdc_lock, flags); 1457 1458 return retval; 1459 } 1460 1461 /** 1462 * pdc_pat_mem_pdt_cell_info - Retrieve information about page deallocation 1463 * table of a cell 1464 * @rinfo: memory pdt information 1465 * @cell: cell number 1466 * 1467 */ 1468 int pdc_pat_mem_pdt_cell_info(struct pdc_pat_mem_cell_pdt_retinfo *rinfo, 1469 unsigned long cell) 1470 { 1471 int retval; 1472 unsigned long flags; 1473 1474 spin_lock_irqsave(&pdc_lock, flags); 1475 retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_CELL_INFO, 1476 __pa(&pdc_result), cell); 1477 if (retval == PDC_OK) 1478 memcpy(rinfo, &pdc_result, sizeof(*rinfo)); 1479 spin_unlock_irqrestore(&pdc_lock, flags); 1480 1481 return retval; 1482 } 1483 1484 /** 1485 * pdc_pat_mem_read_cell_pdt - Read PDT entries from (old) PAT firmware 1486 * @pret: array of PDT entries 1487 * @pdt_entries_ptr: ptr to hold number of PDT entries 1488 * @max_entries: maximum number of entries to be read 1489 * 1490 */ 1491 int pdc_pat_mem_read_cell_pdt(struct pdc_pat_mem_read_pd_retinfo *pret, 1492 unsigned long *pdt_entries_ptr, unsigned long max_entries) 1493 { 1494 int retval; 1495 unsigned long flags, entries; 1496 1497 spin_lock_irqsave(&pdc_lock, flags); 1498 /* PDC_PAT_MEM_CELL_READ is available on early PAT machines only */ 1499 retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_CELL_READ, 1500 __pa(&pdc_result), parisc_cell_num, 1501 __pa(pdt_entries_ptr)); 1502 1503 if (retval == PDC_OK) { 1504 /* build up return value as for PDC_PAT_MEM_PD_READ */ 1505 entries = min(pdc_result[0], max_entries); 1506 pret->pdt_entries = entries; 1507 pret->actual_count_bytes = entries * sizeof(unsigned long); 1508 } 1509 1510 spin_unlock_irqrestore(&pdc_lock, flags); 1511 WARN_ON(retval == PDC_OK && pdc_result[0] > max_entries); 1512 1513 return retval; 1514 } 1515 /** 1516 * pdc_pat_mem_read_pd_pdt - Read PDT entries from (newer) PAT firmware 1517 * @pret: array of PDT entries 1518 * @pdt_entries_ptr: ptr to hold number of PDT entries 1519 * @count: number of bytes to read 1520 * @offset: offset to start (in bytes) 1521 * 1522 */ 1523 int pdc_pat_mem_read_pd_pdt(struct pdc_pat_mem_read_pd_retinfo *pret, 1524 unsigned long *pdt_entries_ptr, unsigned long count, 1525 unsigned long offset) 1526 { 1527 int retval; 1528 unsigned long flags, entries; 1529 1530 spin_lock_irqsave(&pdc_lock, flags); 1531 retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_PD_READ, 1532 __pa(&pdc_result), __pa(pdt_entries_ptr), 1533 count, offset); 1534 1535 if (retval == PDC_OK) { 1536 entries = min(pdc_result[0], count); 1537 pret->actual_count_bytes = entries; 1538 pret->pdt_entries = entries / sizeof(unsigned long); 1539 } 1540 1541 spin_unlock_irqrestore(&pdc_lock, flags); 1542 1543 return retval; 1544 } 1545 1546 /** 1547 * pdc_pat_mem_get_dimm_phys_location - Get physical DIMM slot via PAT firmware 1548 * @pret: ptr to hold returned information 1549 * @phys_addr: physical address to examine 1550 * 1551 */ 1552 int pdc_pat_mem_get_dimm_phys_location( 1553 struct pdc_pat_mem_phys_mem_location *pret, 1554 unsigned long phys_addr) 1555 { 1556 int retval; 1557 unsigned long flags; 1558 1559 spin_lock_irqsave(&pdc_lock, flags); 1560 retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_ADDRESS, 1561 __pa(&pdc_result), phys_addr); 1562 1563 if (retval == PDC_OK) 1564 memcpy(pret, &pdc_result, sizeof(*pret)); 1565 1566 spin_unlock_irqrestore(&pdc_lock, flags); 1567 1568 return retval; 1569 } 1570 #endif /* CONFIG_64BIT */ 1571 #endif /* defined(BOOTLOADER) */ 1572 1573 1574 /***************** 32-bit real-mode calls ***********/ 1575 /* The struct below is used 1576 * to overlay real_stack (real2.S), preparing a 32-bit call frame. 1577 * real32_call_asm() then uses this stack in narrow real mode 1578 */ 1579 1580 struct narrow_stack { 1581 /* use int, not long which is 64 bits */ 1582 unsigned int arg13; 1583 unsigned int arg12; 1584 unsigned int arg11; 1585 unsigned int arg10; 1586 unsigned int arg9; 1587 unsigned int arg8; 1588 unsigned int arg7; 1589 unsigned int arg6; 1590 unsigned int arg5; 1591 unsigned int arg4; 1592 unsigned int arg3; 1593 unsigned int arg2; 1594 unsigned int arg1; 1595 unsigned int arg0; 1596 unsigned int frame_marker[8]; 1597 unsigned int sp; 1598 /* in reality, there's nearly 8k of stack after this */ 1599 }; 1600 1601 long real32_call(unsigned long fn, ...) 1602 { 1603 va_list args; 1604 extern struct narrow_stack real_stack; 1605 extern unsigned long real32_call_asm(unsigned int *, 1606 unsigned int *, 1607 unsigned int); 1608 1609 va_start(args, fn); 1610 real_stack.arg0 = va_arg(args, unsigned int); 1611 real_stack.arg1 = va_arg(args, unsigned int); 1612 real_stack.arg2 = va_arg(args, unsigned int); 1613 real_stack.arg3 = va_arg(args, unsigned int); 1614 real_stack.arg4 = va_arg(args, unsigned int); 1615 real_stack.arg5 = va_arg(args, unsigned int); 1616 real_stack.arg6 = va_arg(args, unsigned int); 1617 real_stack.arg7 = va_arg(args, unsigned int); 1618 real_stack.arg8 = va_arg(args, unsigned int); 1619 real_stack.arg9 = va_arg(args, unsigned int); 1620 real_stack.arg10 = va_arg(args, unsigned int); 1621 real_stack.arg11 = va_arg(args, unsigned int); 1622 real_stack.arg12 = va_arg(args, unsigned int); 1623 real_stack.arg13 = va_arg(args, unsigned int); 1624 va_end(args); 1625 1626 return real32_call_asm(&real_stack.sp, &real_stack.arg0, fn); 1627 } 1628 1629 #ifdef CONFIG_64BIT 1630 /***************** 64-bit real-mode calls ***********/ 1631 1632 struct wide_stack { 1633 unsigned long arg0; 1634 unsigned long arg1; 1635 unsigned long arg2; 1636 unsigned long arg3; 1637 unsigned long arg4; 1638 unsigned long arg5; 1639 unsigned long arg6; 1640 unsigned long arg7; 1641 unsigned long arg8; 1642 unsigned long arg9; 1643 unsigned long arg10; 1644 unsigned long arg11; 1645 unsigned long arg12; 1646 unsigned long arg13; 1647 unsigned long frame_marker[2]; /* rp, previous sp */ 1648 unsigned long sp; 1649 /* in reality, there's nearly 8k of stack after this */ 1650 }; 1651 1652 long real64_call(unsigned long fn, ...) 1653 { 1654 va_list args; 1655 extern struct wide_stack real64_stack; 1656 extern unsigned long real64_call_asm(unsigned long *, 1657 unsigned long *, 1658 unsigned long); 1659 1660 va_start(args, fn); 1661 real64_stack.arg0 = va_arg(args, unsigned long); 1662 real64_stack.arg1 = va_arg(args, unsigned long); 1663 real64_stack.arg2 = va_arg(args, unsigned long); 1664 real64_stack.arg3 = va_arg(args, unsigned long); 1665 real64_stack.arg4 = va_arg(args, unsigned long); 1666 real64_stack.arg5 = va_arg(args, unsigned long); 1667 real64_stack.arg6 = va_arg(args, unsigned long); 1668 real64_stack.arg7 = va_arg(args, unsigned long); 1669 real64_stack.arg8 = va_arg(args, unsigned long); 1670 real64_stack.arg9 = va_arg(args, unsigned long); 1671 real64_stack.arg10 = va_arg(args, unsigned long); 1672 real64_stack.arg11 = va_arg(args, unsigned long); 1673 real64_stack.arg12 = va_arg(args, unsigned long); 1674 real64_stack.arg13 = va_arg(args, unsigned long); 1675 va_end(args); 1676 1677 return real64_call_asm(&real64_stack.sp, &real64_stack.arg0, fn); 1678 } 1679 1680 #endif /* CONFIG_64BIT */ 1681