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