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); 74extern unsigned long pdc_result[NUM_PDC_RESULT]; 75extern unsigned long pdc_result2[NUM_PDC_RESULT]; 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#ifdef CONFIG_64BIT 154void __cpuinit set_firmware_width_unlocked(void) 155{ 156 int ret; 157 158 ret = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES, 159 __pa(pdc_result), 0); 160 convert_to_wide(pdc_result); 161 if (pdc_result[0] != NARROW_FIRMWARE) 162 parisc_narrow_firmware = 0; 163} 164 165/** 166 * set_firmware_width - Determine if the firmware is wide or narrow. 167 * 168 * This function must be called before any pdc_* function that uses the 169 * convert_to_wide function. 170 */ 171void __cpuinit set_firmware_width(void) 172{ 173 unsigned long flags; 174 spin_lock_irqsave(&pdc_lock, flags); 175 set_firmware_width_unlocked(); 176 spin_unlock_irqrestore(&pdc_lock, flags); 177} 178#else 179void __cpuinit set_firmware_width_unlocked(void) { 180 return; 181} 182 183void __cpuinit set_firmware_width(void) { 184 return; 185} 186#endif /*CONFIG_64BIT*/ 187 188/** 189 * pdc_emergency_unlock - Unlock the linux pdc lock 190 * 191 * This call unlocks the linux pdc lock in case we need some PDC functions 192 * (like pdc_add_valid) during kernel stack dump. 193 */ 194void pdc_emergency_unlock(void) 195{ 196 /* Spinlock DEBUG code freaks out if we unconditionally unlock */ 197 if (spin_is_locked(&pdc_lock)) 198 spin_unlock(&pdc_lock); 199} 200 201 202/** 203 * pdc_add_valid - Verify address can be accessed without causing a HPMC. 204 * @address: Address to be verified. 205 * 206 * This PDC call attempts to read from the specified address and verifies 207 * if the address is valid. 208 * 209 * The return value is PDC_OK (0) in case accessing this address is valid. 210 */ 211int pdc_add_valid(unsigned long address) 212{ 213 int retval; 214 unsigned long flags; 215 216 spin_lock_irqsave(&pdc_lock, flags); 217 retval = mem_pdc_call(PDC_ADD_VALID, PDC_ADD_VALID_VERIFY, address); 218 spin_unlock_irqrestore(&pdc_lock, flags); 219 220 return retval; 221} 222EXPORT_SYMBOL(pdc_add_valid); 223 224/** 225 * pdc_chassis_info - Return chassis information. 226 * @result: The return buffer. 227 * @chassis_info: The memory buffer address. 228 * @len: The size of the memory buffer address. 229 * 230 * An HVERSION dependent call for returning the chassis information. 231 */ 232int __init pdc_chassis_info(struct pdc_chassis_info *chassis_info, void *led_info, unsigned long len) 233{ 234 int retval; 235 unsigned long flags; 236 237 spin_lock_irqsave(&pdc_lock, flags); 238 memcpy(&pdc_result, chassis_info, sizeof(*chassis_info)); 239 memcpy(&pdc_result2, led_info, len); 240 retval = mem_pdc_call(PDC_CHASSIS, PDC_RETURN_CHASSIS_INFO, 241 __pa(pdc_result), __pa(pdc_result2), len); 242 memcpy(chassis_info, pdc_result, sizeof(*chassis_info)); 243 memcpy(led_info, pdc_result2, len); 244 spin_unlock_irqrestore(&pdc_lock, flags); 245 246 return retval; 247} 248 249/** 250 * pdc_pat_chassis_send_log - Sends a PDC PAT CHASSIS log message. 251 * @retval: -1 on error, 0 on success. Other value are PDC errors 252 * 253 * Must be correctly formatted or expect system crash 254 */ 255#ifdef CONFIG_64BIT 256int pdc_pat_chassis_send_log(unsigned long state, unsigned long data) 257{ 258 int retval = 0; 259 unsigned long flags; 260 261 if (!is_pdc_pat()) 262 return -1; 263 264 spin_lock_irqsave(&pdc_lock, flags); 265 retval = mem_pdc_call(PDC_PAT_CHASSIS_LOG, PDC_PAT_CHASSIS_WRITE_LOG, __pa(&state), __pa(&data)); 266 spin_unlock_irqrestore(&pdc_lock, flags); 267 268 return retval; 269} 270#endif 271 272/** 273 * pdc_chassis_disp - Updates chassis code 274 * @retval: -1 on error, 0 on success 275 */ 276int pdc_chassis_disp(unsigned long disp) 277{ 278 int retval = 0; 279 unsigned long flags; 280 281 spin_lock_irqsave(&pdc_lock, flags); 282 retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_DISP, disp); 283 spin_unlock_irqrestore(&pdc_lock, flags); 284 285 return retval; 286} 287 288/** 289 * pdc_chassis_warn - Fetches chassis warnings 290 * @retval: -1 on error, 0 on success 291 */ 292int pdc_chassis_warn(unsigned long *warn) 293{ 294 int retval = 0; 295 unsigned long flags; 296 297 spin_lock_irqsave(&pdc_lock, flags); 298 retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_WARN, __pa(pdc_result)); 299 *warn = pdc_result[0]; 300 spin_unlock_irqrestore(&pdc_lock, flags); 301 302 return retval; 303} 304 305int __cpuinit pdc_coproc_cfg_unlocked(struct pdc_coproc_cfg *pdc_coproc_info) 306{ 307 int ret; 308 309 ret = mem_pdc_call(PDC_COPROC, PDC_COPROC_CFG, __pa(pdc_result)); 310 convert_to_wide(pdc_result); 311 pdc_coproc_info->ccr_functional = pdc_result[0]; 312 pdc_coproc_info->ccr_present = pdc_result[1]; 313 pdc_coproc_info->revision = pdc_result[17]; 314 pdc_coproc_info->model = pdc_result[18]; 315 316 return ret; 317} 318 319/** 320 * pdc_coproc_cfg - To identify coprocessors attached to the processor. 321 * @pdc_coproc_info: Return buffer address. 322 * 323 * This PDC call returns the presence and status of all the coprocessors 324 * attached to the processor. 325 */ 326int __cpuinit pdc_coproc_cfg(struct pdc_coproc_cfg *pdc_coproc_info) 327{ 328 int ret; 329 unsigned long flags; 330 331 spin_lock_irqsave(&pdc_lock, flags); 332 ret = pdc_coproc_cfg_unlocked(pdc_coproc_info); 333 spin_unlock_irqrestore(&pdc_lock, flags); 334 335 return ret; 336} 337 338/** 339 * pdc_iodc_read - Read data from the modules IODC. 340 * @actcnt: The actual number of bytes. 341 * @hpa: The HPA of the module for the iodc read. 342 * @index: The iodc entry point. 343 * @iodc_data: A buffer memory for the iodc options. 344 * @iodc_data_size: Size of the memory buffer. 345 * 346 * This PDC call reads from the IODC of the module specified by the hpa 347 * argument. 348 */ 349int pdc_iodc_read(unsigned long *actcnt, unsigned long hpa, unsigned int index, 350 void *iodc_data, unsigned int iodc_data_size) 351{ 352 int retval; 353 unsigned long flags; 354 355 spin_lock_irqsave(&pdc_lock, flags); 356 retval = mem_pdc_call(PDC_IODC, PDC_IODC_READ, __pa(pdc_result), hpa, 357 index, __pa(pdc_result2), iodc_data_size); 358 convert_to_wide(pdc_result); 359 *actcnt = pdc_result[0]; 360 memcpy(iodc_data, pdc_result2, iodc_data_size); 361 spin_unlock_irqrestore(&pdc_lock, flags); 362 363 return retval; 364} 365EXPORT_SYMBOL(pdc_iodc_read); 366 367/** 368 * pdc_system_map_find_mods - Locate unarchitected modules. 369 * @pdc_mod_info: Return buffer address. 370 * @mod_path: pointer to dev path structure. 371 * @mod_index: fixed address module index. 372 * 373 * To locate and identify modules which reside at fixed I/O addresses, which 374 * do not self-identify via architected bus walks. 375 */ 376int pdc_system_map_find_mods(struct pdc_system_map_mod_info *pdc_mod_info, 377 struct pdc_module_path *mod_path, long mod_index) 378{ 379 int retval; 380 unsigned long flags; 381 382 spin_lock_irqsave(&pdc_lock, flags); 383 retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_MODULE, __pa(pdc_result), 384 __pa(pdc_result2), mod_index); 385 convert_to_wide(pdc_result); 386 memcpy(pdc_mod_info, pdc_result, sizeof(*pdc_mod_info)); 387 memcpy(mod_path, pdc_result2, sizeof(*mod_path)); 388 spin_unlock_irqrestore(&pdc_lock, flags); 389 390 pdc_mod_info->mod_addr = f_extend(pdc_mod_info->mod_addr); 391 return retval; 392} 393 394/** 395 * pdc_system_map_find_addrs - Retrieve additional address ranges. 396 * @pdc_addr_info: Return buffer address. 397 * @mod_index: Fixed address module index. 398 * @addr_index: Address range index. 399 * 400 * Retrieve additional information about subsequent address ranges for modules 401 * with multiple address ranges. 402 */ 403int pdc_system_map_find_addrs(struct pdc_system_map_addr_info *pdc_addr_info, 404 long mod_index, long addr_index) 405{ 406 int retval; 407 unsigned long flags; 408 409 spin_lock_irqsave(&pdc_lock, flags); 410 retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_ADDRESS, __pa(pdc_result), 411 mod_index, addr_index); 412 convert_to_wide(pdc_result); 413 memcpy(pdc_addr_info, pdc_result, sizeof(*pdc_addr_info)); 414 spin_unlock_irqrestore(&pdc_lock, flags); 415 416 pdc_addr_info->mod_addr = f_extend(pdc_addr_info->mod_addr); 417 return retval; 418} 419 420/** 421 * pdc_model_info - Return model information about the processor. 422 * @model: The return buffer. 423 * 424 * Returns the version numbers, identifiers, and capabilities from the processor module. 425 */ 426int pdc_model_info(struct pdc_model *model) 427{ 428 int retval; 429 unsigned long flags; 430 431 spin_lock_irqsave(&pdc_lock, flags); 432 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_INFO, __pa(pdc_result), 0); 433 convert_to_wide(pdc_result); 434 memcpy(model, pdc_result, sizeof(*model)); 435 spin_unlock_irqrestore(&pdc_lock, flags); 436 437 return retval; 438} 439 440/** 441 * pdc_model_sysmodel - Get the system model name. 442 * @name: A char array of at least 81 characters. 443 * 444 * Get system model name from PDC ROM (e.g. 9000/715 or 9000/778/B160L). 445 * Using OS_ID_HPUX will return the equivalent of the 'modelname' command 446 * on HP/UX. 447 */ 448int pdc_model_sysmodel(char *name) 449{ 450 int retval; 451 unsigned long flags; 452 453 spin_lock_irqsave(&pdc_lock, flags); 454 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_SYSMODEL, __pa(pdc_result), 455 OS_ID_HPUX, __pa(name)); 456 convert_to_wide(pdc_result); 457 458 if (retval == PDC_OK) { 459 name[pdc_result[0]] = '\0'; /* add trailing '\0' */ 460 } else { 461 name[0] = 0; 462 } 463 spin_unlock_irqrestore(&pdc_lock, flags); 464 465 return retval; 466} 467 468/** 469 * pdc_model_versions - Identify the version number of each processor. 470 * @cpu_id: The return buffer. 471 * @id: The id of the processor to check. 472 * 473 * Returns the version number for each processor component. 474 * 475 * This comment was here before, but I do not know what it means :( -RB 476 * id: 0 = cpu revision, 1 = boot-rom-version 477 */ 478int pdc_model_versions(unsigned long *versions, int id) 479{ 480 int retval; 481 unsigned long flags; 482 483 spin_lock_irqsave(&pdc_lock, flags); 484 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_VERSIONS, __pa(pdc_result), id); 485 convert_to_wide(pdc_result); 486 *versions = pdc_result[0]; 487 spin_unlock_irqrestore(&pdc_lock, flags); 488 489 return retval; 490} 491 492/** 493 * pdc_model_cpuid - Returns the CPU_ID. 494 * @cpu_id: The return buffer. 495 * 496 * Returns the CPU_ID value which uniquely identifies the cpu portion of 497 * the processor module. 498 */ 499int pdc_model_cpuid(unsigned long *cpu_id) 500{ 501 int retval; 502 unsigned long flags; 503 504 spin_lock_irqsave(&pdc_lock, flags); 505 pdc_result[0] = 0; /* preset zero (call may not be implemented!) */ 506 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CPU_ID, __pa(pdc_result), 0); 507 convert_to_wide(pdc_result); 508 *cpu_id = pdc_result[0]; 509 spin_unlock_irqrestore(&pdc_lock, flags); 510 511 return retval; 512} 513 514/** 515 * pdc_model_capabilities - Returns the platform capabilities. 516 * @capabilities: The return buffer. 517 * 518 * Returns information about platform support for 32- and/or 64-bit 519 * OSes, IO-PDIR coherency, and virtual aliasing. 520 */ 521int pdc_model_capabilities(unsigned long *capabilities) 522{ 523 int retval; 524 unsigned long flags; 525 526 spin_lock_irqsave(&pdc_lock, flags); 527 pdc_result[0] = 0; /* preset zero (call may not be implemented!) */ 528 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES, __pa(pdc_result), 0); 529 convert_to_wide(pdc_result); 530 if (retval == PDC_OK) { 531 *capabilities = pdc_result[0]; 532 } else { 533 *capabilities = PDC_MODEL_OS32; 534 } 535 spin_unlock_irqrestore(&pdc_lock, flags); 536 537 return retval; 538} 539 540/** 541 * pdc_cache_info - Return cache and TLB information. 542 * @cache_info: The return buffer. 543 * 544 * Returns information about the processor's cache and TLB. 545 */ 546int pdc_cache_info(struct pdc_cache_info *cache_info) 547{ 548 int retval; 549 unsigned long flags; 550 551 spin_lock_irqsave(&pdc_lock, flags); 552 retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_INFO, __pa(pdc_result), 0); 553 convert_to_wide(pdc_result); 554 memcpy(cache_info, pdc_result, sizeof(*cache_info)); 555 spin_unlock_irqrestore(&pdc_lock, flags); 556 557 return retval; 558} 559 560/** 561 * pdc_spaceid_bits - Return whether Space ID hashing is turned on. 562 * @space_bits: Should be 0, if not, bad mojo! 563 * 564 * Returns information about Space ID hashing. 565 */ 566int pdc_spaceid_bits(unsigned long *space_bits) 567{ 568 int retval; 569 unsigned long flags; 570 571 spin_lock_irqsave(&pdc_lock, flags); 572 pdc_result[0] = 0; 573 retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_RET_SPID, __pa(pdc_result), 0); 574 convert_to_wide(pdc_result); 575 *space_bits = pdc_result[0]; 576 spin_unlock_irqrestore(&pdc_lock, flags); 577 578 return retval; 579} 580 581#ifndef CONFIG_PA20 582/** 583 * pdc_btlb_info - Return block TLB information. 584 * @btlb: The return buffer. 585 * 586 * Returns information about the hardware Block TLB. 587 */ 588int pdc_btlb_info(struct pdc_btlb_info *btlb) 589{ 590 int retval; 591 unsigned long flags; 592 593 spin_lock_irqsave(&pdc_lock, flags); 594 retval = mem_pdc_call(PDC_BLOCK_TLB, PDC_BTLB_INFO, __pa(pdc_result), 0); 595 memcpy(btlb, pdc_result, sizeof(*btlb)); 596 spin_unlock_irqrestore(&pdc_lock, flags); 597 598 if(retval < 0) { 599 btlb->max_size = 0; 600 } 601 return retval; 602} 603 604/** 605 * pdc_mem_map_hpa - Find fixed module information. 606 * @address: The return buffer 607 * @mod_path: pointer to dev path structure. 608 * 609 * This call was developed for S700 workstations to allow the kernel to find 610 * the I/O devices (Core I/O). In the future (Kittyhawk and beyond) this 611 * call will be replaced (on workstations) by the architected PDC_SYSTEM_MAP 612 * call. 613 * 614 * This call is supported by all existing S700 workstations (up to Gecko). 615 */ 616int pdc_mem_map_hpa(struct pdc_memory_map *address, 617 struct pdc_module_path *mod_path) 618{ 619 int retval; 620 unsigned long flags; 621 622 spin_lock_irqsave(&pdc_lock, flags); 623 memcpy(pdc_result2, mod_path, sizeof(*mod_path)); 624 retval = mem_pdc_call(PDC_MEM_MAP, PDC_MEM_MAP_HPA, __pa(pdc_result), 625 __pa(pdc_result2)); 626 memcpy(address, pdc_result, sizeof(*address)); 627 spin_unlock_irqrestore(&pdc_lock, flags); 628 629 return retval; 630} 631#endif /* !CONFIG_PA20 */ 632 633/** 634 * pdc_lan_station_id - Get the LAN address. 635 * @lan_addr: The return buffer. 636 * @hpa: The network device HPA. 637 * 638 * Get the LAN station address when it is not directly available from the LAN hardware. 639 */ 640int pdc_lan_station_id(char *lan_addr, unsigned long hpa) 641{ 642 int retval; 643 unsigned long flags; 644 645 spin_lock_irqsave(&pdc_lock, flags); 646 retval = mem_pdc_call(PDC_LAN_STATION_ID, PDC_LAN_STATION_ID_READ, 647 __pa(pdc_result), hpa); 648 if (retval < 0) { 649 memset(lan_addr, 0, PDC_LAN_STATION_ID_SIZE); 650 } else { 651 memcpy(lan_addr, pdc_result, PDC_LAN_STATION_ID_SIZE); 652 } 653 spin_unlock_irqrestore(&pdc_lock, flags); 654 655 return retval; 656} 657EXPORT_SYMBOL(pdc_lan_station_id); 658 659/** 660 * pdc_stable_read - Read data from Stable Storage. 661 * @staddr: Stable Storage address to access. 662 * @memaddr: The memory address where Stable Storage data shall be copied. 663 * @count: number of bytes to transfer. count is multiple of 4. 664 * 665 * This PDC call reads from the Stable Storage address supplied in staddr 666 * and copies count bytes to the memory address memaddr. 667 * The call will fail if staddr+count > PDC_STABLE size. 668 */ 669int pdc_stable_read(unsigned long staddr, void *memaddr, unsigned long count) 670{ 671 int retval; 672 unsigned long flags; 673 674 spin_lock_irqsave(&pdc_lock, flags); 675 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_READ, staddr, 676 __pa(pdc_result), count); 677 convert_to_wide(pdc_result); 678 memcpy(memaddr, pdc_result, count); 679 spin_unlock_irqrestore(&pdc_lock, flags); 680 681 return retval; 682} 683EXPORT_SYMBOL(pdc_stable_read); 684 685/** 686 * pdc_stable_write - Write data to Stable Storage. 687 * @staddr: Stable Storage address to access. 688 * @memaddr: The memory address where Stable Storage data shall be read from. 689 * @count: number of bytes to transfer. count is multiple of 4. 690 * 691 * This PDC call reads count bytes from the supplied memaddr address, 692 * and copies count bytes to the Stable Storage address staddr. 693 * The call will fail if staddr+count > PDC_STABLE size. 694 */ 695int pdc_stable_write(unsigned long staddr, void *memaddr, unsigned long count) 696{ 697 int retval; 698 unsigned long flags; 699 700 spin_lock_irqsave(&pdc_lock, flags); 701 memcpy(pdc_result, memaddr, count); 702 convert_to_wide(pdc_result); 703 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_WRITE, staddr, 704 __pa(pdc_result), count); 705 spin_unlock_irqrestore(&pdc_lock, flags); 706 707 return retval; 708} 709EXPORT_SYMBOL(pdc_stable_write); 710 711/** 712 * pdc_stable_get_size - Get Stable Storage size in bytes. 713 * @size: pointer where the size will be stored. 714 * 715 * This PDC call returns the number of bytes in the processor's Stable 716 * Storage, which is the number of contiguous bytes implemented in Stable 717 * Storage starting from staddr=0. size in an unsigned 64-bit integer 718 * which is a multiple of four. 719 */ 720int pdc_stable_get_size(unsigned long *size) 721{ 722 int retval; 723 unsigned long flags; 724 725 spin_lock_irqsave(&pdc_lock, flags); 726 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_RETURN_SIZE, __pa(pdc_result)); 727 *size = pdc_result[0]; 728 spin_unlock_irqrestore(&pdc_lock, flags); 729 730 return retval; 731} 732EXPORT_SYMBOL(pdc_stable_get_size); 733 734/** 735 * pdc_stable_verify_contents - Checks that Stable Storage contents are valid. 736 * 737 * This PDC call is meant to be used to check the integrity of the current 738 * contents of Stable Storage. 739 */ 740int pdc_stable_verify_contents(void) 741{ 742 int retval; 743 unsigned long flags; 744 745 spin_lock_irqsave(&pdc_lock, flags); 746 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_VERIFY_CONTENTS); 747 spin_unlock_irqrestore(&pdc_lock, flags); 748 749 return retval; 750} 751EXPORT_SYMBOL(pdc_stable_verify_contents); 752 753/** 754 * pdc_stable_initialize - Sets Stable Storage contents to zero and initialize 755 * the validity indicator. 756 * 757 * This PDC call will erase all contents of Stable Storage. Use with care! 758 */ 759int pdc_stable_initialize(void) 760{ 761 int retval; 762 unsigned long flags; 763 764 spin_lock_irqsave(&pdc_lock, flags); 765 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_INITIALIZE); 766 spin_unlock_irqrestore(&pdc_lock, flags); 767 768 return retval; 769} 770EXPORT_SYMBOL(pdc_stable_initialize); 771 772/** 773 * pdc_get_initiator - Get the SCSI Interface Card params (SCSI ID, SDTR, SE or LVD) 774 * @hwpath: fully bc.mod style path to the device. 775 * @initiator: the array to return the result into 776 * 777 * Get the SCSI operational parameters from PDC. 778 * Needed since HPUX never used BIOS or symbios card NVRAM. 779 * Most ncr/sym cards won't have an entry and just use whatever 780 * capabilities of the card are (eg Ultra, LVD). But there are 781 * several cases where it's useful: 782 * o set SCSI id for Multi-initiator clusters, 783 * o cable too long (ie SE scsi 10Mhz won't support 6m length), 784 * o bus width exported is less than what the interface chip supports. 785 */ 786int pdc_get_initiator(struct hardware_path *hwpath, struct pdc_initiator *initiator) 787{ 788 int retval; 789 unsigned long flags; 790 791 spin_lock_irqsave(&pdc_lock, flags); 792 793#define IS_SPROCKETS() (strlen(boot_cpu_data.pdc.sys_model_name) == 14 && \ 794 strncmp(boot_cpu_data.pdc.sys_model_name, "9000/785", 8) == 0) 795 796 retval = mem_pdc_call(PDC_INITIATOR, PDC_GET_INITIATOR, 797 __pa(pdc_result), __pa(hwpath)); 798 if (retval < PDC_OK) 799 goto out; 800 801 if (pdc_result[0] < 16) { 802 initiator->host_id = pdc_result[0]; 803 } else { 804 initiator->host_id = -1; 805 } 806 807 /* 808 * Sprockets and Piranha return 20 or 40 (MT/s). Prelude returns 809 * 1, 2, 5 or 10 for 5, 10, 20 or 40 MT/s, respectively 810 */ 811 switch (pdc_result[1]) { 812 case 1: initiator->factor = 50; break; 813 case 2: initiator->factor = 25; break; 814 case 5: initiator->factor = 12; break; 815 case 25: initiator->factor = 10; break; 816 case 20: initiator->factor = 12; break; 817 case 40: initiator->factor = 10; break; 818 default: initiator->factor = -1; break; 819 } 820 821 if (IS_SPROCKETS()) { 822 initiator->width = pdc_result[4]; 823 initiator->mode = pdc_result[5]; 824 } else { 825 initiator->width = -1; 826 initiator->mode = -1; 827 } 828 829 out: 830 spin_unlock_irqrestore(&pdc_lock, flags); 831 832 return (retval >= PDC_OK); 833} 834EXPORT_SYMBOL(pdc_get_initiator); 835 836 837/** 838 * pdc_pci_irt_size - Get the number of entries in the interrupt routing table. 839 * @num_entries: The return value. 840 * @hpa: The HPA for the device. 841 * 842 * This PDC function returns the number of entries in the specified cell's 843 * interrupt table. 844 * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes 845 */ 846int pdc_pci_irt_size(unsigned long *num_entries, unsigned long hpa) 847{ 848 int retval; 849 unsigned long flags; 850 851 spin_lock_irqsave(&pdc_lock, flags); 852 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL_SIZE, 853 __pa(pdc_result), hpa); 854 convert_to_wide(pdc_result); 855 *num_entries = pdc_result[0]; 856 spin_unlock_irqrestore(&pdc_lock, flags); 857 858 return retval; 859} 860 861/** 862 * pdc_pci_irt - Get the PCI interrupt routing table. 863 * @num_entries: The number of entries in the table. 864 * @hpa: The Hard Physical Address of the device. 865 * @tbl: 866 * 867 * Get the PCI interrupt routing table for the device at the given HPA. 868 * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes 869 */ 870int pdc_pci_irt(unsigned long num_entries, unsigned long hpa, void *tbl) 871{ 872 int retval; 873 unsigned long flags; 874 875 BUG_ON((unsigned long)tbl & 0x7); 876 877 spin_lock_irqsave(&pdc_lock, flags); 878 pdc_result[0] = num_entries; 879 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL, 880 __pa(pdc_result), hpa, __pa(tbl)); 881 spin_unlock_irqrestore(&pdc_lock, flags); 882 883 return retval; 884} 885 886 887 888/** 889 * pdc_tod_read - Read the Time-Of-Day clock. 890 * @tod: The return buffer: 891 * 892 * Read the Time-Of-Day clock 893 */ 894int pdc_tod_read(struct pdc_tod *tod) 895{ 896 int retval; 897 unsigned long flags; 898 899 spin_lock_irqsave(&pdc_lock, flags); 900 retval = mem_pdc_call(PDC_TOD, PDC_TOD_READ, __pa(pdc_result), 0); 901 convert_to_wide(pdc_result); 902 memcpy(tod, pdc_result, sizeof(*tod)); 903 spin_unlock_irqrestore(&pdc_lock, flags); 904 905 return retval; 906} 907EXPORT_SYMBOL(pdc_tod_read); 908 909/** 910 * pdc_tod_set - Set the Time-Of-Day clock. 911 * @sec: The number of seconds since epoch. 912 * @usec: The number of micro seconds. 913 * 914 * Set the Time-Of-Day clock. 915 */ 916int pdc_tod_set(unsigned long sec, unsigned long usec) 917{ 918 int retval; 919 unsigned long flags; 920 921 spin_lock_irqsave(&pdc_lock, flags); 922 retval = mem_pdc_call(PDC_TOD, PDC_TOD_WRITE, sec, usec); 923 spin_unlock_irqrestore(&pdc_lock, flags); 924 925 return retval; 926} 927EXPORT_SYMBOL(pdc_tod_set); 928 929#ifdef CONFIG_64BIT 930int pdc_mem_mem_table(struct pdc_memory_table_raddr *r_addr, 931 struct pdc_memory_table *tbl, unsigned long entries) 932{ 933 int retval; 934 unsigned long flags; 935 936 spin_lock_irqsave(&pdc_lock, flags); 937 retval = mem_pdc_call(PDC_MEM, PDC_MEM_TABLE, __pa(pdc_result), __pa(pdc_result2), entries); 938 convert_to_wide(pdc_result); 939 memcpy(r_addr, pdc_result, sizeof(*r_addr)); 940 memcpy(tbl, pdc_result2, entries * sizeof(*tbl)); 941 spin_unlock_irqrestore(&pdc_lock, flags); 942 943 return retval; 944} 945#endif /* CONFIG_64BIT */ 946 947int pdc_do_firm_test_reset(unsigned long ftc_bitmap) 948{ 949 int retval; 950 unsigned long flags; 951 952 spin_lock_irqsave(&pdc_lock, flags); 953 retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_FIRM_TEST_RESET, 954 PDC_FIRM_TEST_MAGIC, ftc_bitmap); 955 spin_unlock_irqrestore(&pdc_lock, flags); 956 957 return retval; 958} 959 960/* 961 * pdc_do_reset - Reset the system. 962 * 963 * Reset the system. 964 */ 965int pdc_do_reset(void) 966{ 967 int retval; 968 unsigned long flags; 969 970 spin_lock_irqsave(&pdc_lock, flags); 971 retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_RESET); 972 spin_unlock_irqrestore(&pdc_lock, flags); 973 974 return retval; 975} 976 977/* 978 * pdc_soft_power_info - Enable soft power switch. 979 * @power_reg: address of soft power register 980 * 981 * Return the absolute address of the soft power switch register 982 */ 983int __init pdc_soft_power_info(unsigned long *power_reg) 984{ 985 int retval; 986 unsigned long flags; 987 988 *power_reg = (unsigned long) (-1); 989 990 spin_lock_irqsave(&pdc_lock, flags); 991 retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_INFO, __pa(pdc_result), 0); 992 if (retval == PDC_OK) { 993 convert_to_wide(pdc_result); 994 *power_reg = f_extend(pdc_result[0]); 995 } 996 spin_unlock_irqrestore(&pdc_lock, flags); 997 998 return retval; 999} 1000 1001/* 1002 * pdc_soft_power_button - Control the soft power button behaviour 1003 * @sw_control: 0 for hardware control, 1 for software control 1004 * 1005 * 1006 * This PDC function places the soft power button under software or 1007 * hardware control. 1008 * Under software control the OS may control to when to allow to shut 1009 * down the system. Under hardware control pressing the power button 1010 * powers off the system immediately. 1011 */ 1012int pdc_soft_power_button(int sw_control) 1013{ 1014 int retval; 1015 unsigned long flags; 1016 1017 spin_lock_irqsave(&pdc_lock, flags); 1018 retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_ENABLE, __pa(pdc_result), sw_control); 1019 spin_unlock_irqrestore(&pdc_lock, flags); 1020 1021 return retval; 1022} 1023 1024/* 1025 * pdc_io_reset - Hack to avoid overlapping range registers of Bridges devices. 1026 * Primarily a problem on T600 (which parisc-linux doesn't support) but 1027 * who knows what other platform firmware might do with this OS "hook". 1028 */ 1029void pdc_io_reset(void) 1030{ 1031 unsigned long flags; 1032 1033 spin_lock_irqsave(&pdc_lock, flags); 1034 mem_pdc_call(PDC_IO, PDC_IO_RESET, 0); 1035 spin_unlock_irqrestore(&pdc_lock, flags); 1036} 1037 1038/* 1039 * pdc_io_reset_devices - Hack to Stop USB controller 1040 * 1041 * If PDC used the usb controller, the usb controller 1042 * is still running and will crash the machines during iommu 1043 * setup, because of still running DMA. This PDC call 1044 * stops the USB controller. 1045 * Normally called after calling pdc_io_reset(). 1046 */ 1047void pdc_io_reset_devices(void) 1048{ 1049 unsigned long flags; 1050 1051 spin_lock_irqsave(&pdc_lock, flags); 1052 mem_pdc_call(PDC_IO, PDC_IO_RESET_DEVICES, 0); 1053 spin_unlock_irqrestore(&pdc_lock, flags); 1054} 1055 1056/* locked by pdc_console_lock */ 1057static int __attribute__((aligned(8))) iodc_retbuf[32]; 1058static char __attribute__((aligned(64))) iodc_dbuf[4096]; 1059 1060/** 1061 * pdc_iodc_print - Console print using IODC. 1062 * @str: the string to output. 1063 * @count: length of str 1064 * 1065 * Note that only these special chars are architected for console IODC io: 1066 * BEL, BS, CR, and LF. Others are passed through. 1067 * Since the HP console requires CR+LF to perform a 'newline', we translate 1068 * "\n" to "\r\n". 1069 */ 1070int pdc_iodc_print(const unsigned char *str, unsigned count) 1071{ 1072 unsigned int i; 1073 unsigned long flags; 1074 1075 for (i = 0; i < count;) { 1076 switch(str[i]) { 1077 case '\n': 1078 iodc_dbuf[i+0] = '\r'; 1079 iodc_dbuf[i+1] = '\n'; 1080 i += 2; 1081 goto print; 1082 default: 1083 iodc_dbuf[i] = str[i]; 1084 i++; 1085 break; 1086 } 1087 } 1088 1089print: 1090 spin_lock_irqsave(&pdc_lock, flags); 1091 real32_call(PAGE0->mem_cons.iodc_io, 1092 (unsigned long)PAGE0->mem_cons.hpa, ENTRY_IO_COUT, 1093 PAGE0->mem_cons.spa, __pa(PAGE0->mem_cons.dp.layers), 1094 __pa(iodc_retbuf), 0, __pa(iodc_dbuf), i, 0); 1095 spin_unlock_irqrestore(&pdc_lock, flags); 1096 1097 return i; 1098} 1099 1100/** 1101 * pdc_iodc_getc - Read a character (non-blocking) from the PDC console. 1102 * 1103 * Read a character (non-blocking) from the PDC console, returns -1 if 1104 * key is not present. 1105 */ 1106int pdc_iodc_getc(void) 1107{ 1108 int ch; 1109 int status; 1110 unsigned long flags; 1111 1112 /* Bail if no console input device. */ 1113 if (!PAGE0->mem_kbd.iodc_io) 1114 return 0; 1115 1116 /* wait for a keyboard (rs232)-input */ 1117 spin_lock_irqsave(&pdc_lock, flags); 1118 real32_call(PAGE0->mem_kbd.iodc_io, 1119 (unsigned long)PAGE0->mem_kbd.hpa, ENTRY_IO_CIN, 1120 PAGE0->mem_kbd.spa, __pa(PAGE0->mem_kbd.dp.layers), 1121 __pa(iodc_retbuf), 0, __pa(iodc_dbuf), 1, 0); 1122 1123 ch = *iodc_dbuf; 1124 status = *iodc_retbuf; 1125 spin_unlock_irqrestore(&pdc_lock, flags); 1126 1127 if (status == 0) 1128 return -1; 1129 1130 return ch; 1131} 1132 1133int pdc_sti_call(unsigned long func, unsigned long flags, 1134 unsigned long inptr, unsigned long outputr, 1135 unsigned long glob_cfg) 1136{ 1137 int retval; 1138 unsigned long irqflags; 1139 1140 spin_lock_irqsave(&pdc_lock, irqflags); 1141 retval = real32_call(func, flags, inptr, outputr, glob_cfg); 1142 spin_unlock_irqrestore(&pdc_lock, irqflags); 1143 1144 return retval; 1145} 1146EXPORT_SYMBOL(pdc_sti_call); 1147 1148#ifdef CONFIG_64BIT 1149/** 1150 * pdc_pat_cell_get_number - Returns the cell number. 1151 * @cell_info: The return buffer. 1152 * 1153 * This PDC call returns the cell number of the cell from which the call 1154 * is made. 1155 */ 1156int pdc_pat_cell_get_number(struct pdc_pat_cell_num *cell_info) 1157{ 1158 int retval; 1159 unsigned long flags; 1160 1161 spin_lock_irqsave(&pdc_lock, flags); 1162 retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_GET_NUMBER, __pa(pdc_result)); 1163 memcpy(cell_info, pdc_result, sizeof(*cell_info)); 1164 spin_unlock_irqrestore(&pdc_lock, flags); 1165 1166 return retval; 1167} 1168 1169/** 1170 * pdc_pat_cell_module - Retrieve the cell's module information. 1171 * @actcnt: The number of bytes written to mem_addr. 1172 * @ploc: The physical location. 1173 * @mod: The module index. 1174 * @view_type: The view of the address type. 1175 * @mem_addr: The return buffer. 1176 * 1177 * This PDC call returns information about each module attached to the cell 1178 * at the specified location. 1179 */ 1180int pdc_pat_cell_module(unsigned long *actcnt, unsigned long ploc, unsigned long mod, 1181 unsigned long view_type, void *mem_addr) 1182{ 1183 int retval; 1184 unsigned long flags; 1185 static struct pdc_pat_cell_mod_maddr_block result __attribute__ ((aligned (8))); 1186 1187 spin_lock_irqsave(&pdc_lock, flags); 1188 retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_MODULE, __pa(pdc_result), 1189 ploc, mod, view_type, __pa(&result)); 1190 if(!retval) { 1191 *actcnt = pdc_result[0]; 1192 memcpy(mem_addr, &result, *actcnt); 1193 } 1194 spin_unlock_irqrestore(&pdc_lock, flags); 1195 1196 return retval; 1197} 1198 1199/** 1200 * pdc_pat_cpu_get_number - Retrieve the cpu number. 1201 * @cpu_info: The return buffer. 1202 * @hpa: The Hard Physical Address of the CPU. 1203 * 1204 * Retrieve the cpu number for the cpu at the specified HPA. 1205 */ 1206int pdc_pat_cpu_get_number(struct pdc_pat_cpu_num *cpu_info, void *hpa) 1207{ 1208 int retval; 1209 unsigned long flags; 1210 1211 spin_lock_irqsave(&pdc_lock, flags); 1212 retval = mem_pdc_call(PDC_PAT_CPU, PDC_PAT_CPU_GET_NUMBER, 1213 __pa(&pdc_result), hpa); 1214 memcpy(cpu_info, pdc_result, sizeof(*cpu_info)); 1215 spin_unlock_irqrestore(&pdc_lock, flags); 1216 1217 return retval; 1218} 1219 1220/** 1221 * pdc_pat_get_irt_size - Retrieve the number of entries in the cell's interrupt table. 1222 * @num_entries: The return value. 1223 * @cell_num: The target cell. 1224 * 1225 * This PDC function returns the number of entries in the specified cell's 1226 * interrupt table. 1227 */ 1228int pdc_pat_get_irt_size(unsigned long *num_entries, unsigned long cell_num) 1229{ 1230 int retval; 1231 unsigned long flags; 1232 1233 spin_lock_irqsave(&pdc_lock, flags); 1234 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE_SIZE, 1235 __pa(pdc_result), cell_num); 1236 *num_entries = pdc_result[0]; 1237 spin_unlock_irqrestore(&pdc_lock, flags); 1238 1239 return retval; 1240} 1241 1242/** 1243 * pdc_pat_get_irt - Retrieve the cell's interrupt table. 1244 * @r_addr: The return buffer. 1245 * @cell_num: The target cell. 1246 * 1247 * This PDC function returns the actual interrupt table for the specified cell. 1248 */ 1249int pdc_pat_get_irt(void *r_addr, unsigned long cell_num) 1250{ 1251 int retval; 1252 unsigned long flags; 1253 1254 spin_lock_irqsave(&pdc_lock, flags); 1255 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE, 1256 __pa(r_addr), cell_num); 1257 spin_unlock_irqrestore(&pdc_lock, flags); 1258 1259 return retval; 1260} 1261 1262/** 1263 * pdc_pat_pd_get_addr_map - Retrieve information about memory address ranges. 1264 * @actlen: The return buffer. 1265 * @mem_addr: Pointer to the memory buffer. 1266 * @count: The number of bytes to read from the buffer. 1267 * @offset: The offset with respect to the beginning of the buffer. 1268 * 1269 */ 1270int pdc_pat_pd_get_addr_map(unsigned long *actual_len, void *mem_addr, 1271 unsigned long count, unsigned long offset) 1272{ 1273 int retval; 1274 unsigned long flags; 1275 1276 spin_lock_irqsave(&pdc_lock, flags); 1277 retval = mem_pdc_call(PDC_PAT_PD, PDC_PAT_PD_GET_ADDR_MAP, __pa(pdc_result), 1278 __pa(pdc_result2), count, offset); 1279 *actual_len = pdc_result[0]; 1280 memcpy(mem_addr, pdc_result2, *actual_len); 1281 spin_unlock_irqrestore(&pdc_lock, flags); 1282 1283 return retval; 1284} 1285 1286/** 1287 * pdc_pat_io_pci_cfg_read - Read PCI configuration space. 1288 * @pci_addr: PCI configuration space address for which the read request is being made. 1289 * @pci_size: Size of read in bytes. Valid values are 1, 2, and 4. 1290 * @mem_addr: Pointer to return memory buffer. 1291 * 1292 */ 1293int pdc_pat_io_pci_cfg_read(unsigned long pci_addr, int pci_size, u32 *mem_addr) 1294{ 1295 int retval; 1296 unsigned long flags; 1297 1298 spin_lock_irqsave(&pdc_lock, flags); 1299 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_READ, 1300 __pa(pdc_result), pci_addr, pci_size); 1301 switch(pci_size) { 1302 case 1: *(u8 *) mem_addr = (u8) pdc_result[0]; 1303 case 2: *(u16 *)mem_addr = (u16) pdc_result[0]; 1304 case 4: *(u32 *)mem_addr = (u32) pdc_result[0]; 1305 } 1306 spin_unlock_irqrestore(&pdc_lock, flags); 1307 1308 return retval; 1309} 1310 1311/** 1312 * pdc_pat_io_pci_cfg_write - Retrieve information about memory address ranges. 1313 * @pci_addr: PCI configuration space address for which the write request is being made. 1314 * @pci_size: Size of write in bytes. Valid values are 1, 2, and 4. 1315 * @value: Pointer to 1, 2, or 4 byte value in low order end of argument to be 1316 * written to PCI Config space. 1317 * 1318 */ 1319int pdc_pat_io_pci_cfg_write(unsigned long pci_addr, int pci_size, u32 val) 1320{ 1321 int retval; 1322 unsigned long flags; 1323 1324 spin_lock_irqsave(&pdc_lock, flags); 1325 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_WRITE, 1326 pci_addr, pci_size, val); 1327 spin_unlock_irqrestore(&pdc_lock, flags); 1328 1329 return retval; 1330} 1331#endif /* CONFIG_64BIT */ 1332 1333 1334/***************** 32-bit real-mode calls ***********/ 1335/* The struct below is used 1336 * to overlay real_stack (real2.S), preparing a 32-bit call frame. 1337 * real32_call_asm() then uses this stack in narrow real mode 1338 */ 1339 1340struct narrow_stack { 1341 /* use int, not long which is 64 bits */ 1342 unsigned int arg13; 1343 unsigned int arg12; 1344 unsigned int arg11; 1345 unsigned int arg10; 1346 unsigned int arg9; 1347 unsigned int arg8; 1348 unsigned int arg7; 1349 unsigned int arg6; 1350 unsigned int arg5; 1351 unsigned int arg4; 1352 unsigned int arg3; 1353 unsigned int arg2; 1354 unsigned int arg1; 1355 unsigned int arg0; 1356 unsigned int frame_marker[8]; 1357 unsigned int sp; 1358 /* in reality, there's nearly 8k of stack after this */ 1359}; 1360 1361long real32_call(unsigned long fn, ...) 1362{ 1363 va_list args; 1364 extern struct narrow_stack real_stack; 1365 extern unsigned long real32_call_asm(unsigned int *, 1366 unsigned int *, 1367 unsigned int); 1368 1369 va_start(args, fn); 1370 real_stack.arg0 = va_arg(args, unsigned int); 1371 real_stack.arg1 = va_arg(args, unsigned int); 1372 real_stack.arg2 = va_arg(args, unsigned int); 1373 real_stack.arg3 = va_arg(args, unsigned int); 1374 real_stack.arg4 = va_arg(args, unsigned int); 1375 real_stack.arg5 = va_arg(args, unsigned int); 1376 real_stack.arg6 = va_arg(args, unsigned int); 1377 real_stack.arg7 = va_arg(args, unsigned int); 1378 real_stack.arg8 = va_arg(args, unsigned int); 1379 real_stack.arg9 = va_arg(args, unsigned int); 1380 real_stack.arg10 = va_arg(args, unsigned int); 1381 real_stack.arg11 = va_arg(args, unsigned int); 1382 real_stack.arg12 = va_arg(args, unsigned int); 1383 real_stack.arg13 = va_arg(args, unsigned int); 1384 va_end(args); 1385 1386 return real32_call_asm(&real_stack.sp, &real_stack.arg0, fn); 1387} 1388 1389#ifdef CONFIG_64BIT 1390/***************** 64-bit real-mode calls ***********/ 1391 1392struct wide_stack { 1393 unsigned long arg0; 1394 unsigned long arg1; 1395 unsigned long arg2; 1396 unsigned long arg3; 1397 unsigned long arg4; 1398 unsigned long arg5; 1399 unsigned long arg6; 1400 unsigned long arg7; 1401 unsigned long arg8; 1402 unsigned long arg9; 1403 unsigned long arg10; 1404 unsigned long arg11; 1405 unsigned long arg12; 1406 unsigned long arg13; 1407 unsigned long frame_marker[2]; /* rp, previous sp */ 1408 unsigned long sp; 1409 /* in reality, there's nearly 8k of stack after this */ 1410}; 1411 1412long real64_call(unsigned long fn, ...) 1413{ 1414 va_list args; 1415 extern struct wide_stack real64_stack; 1416 extern unsigned long real64_call_asm(unsigned long *, 1417 unsigned long *, 1418 unsigned long); 1419 1420 va_start(args, fn); 1421 real64_stack.arg0 = va_arg(args, unsigned long); 1422 real64_stack.arg1 = va_arg(args, unsigned long); 1423 real64_stack.arg2 = va_arg(args, unsigned long); 1424 real64_stack.arg3 = va_arg(args, unsigned long); 1425 real64_stack.arg4 = va_arg(args, unsigned long); 1426 real64_stack.arg5 = va_arg(args, unsigned long); 1427 real64_stack.arg6 = va_arg(args, unsigned long); 1428 real64_stack.arg7 = va_arg(args, unsigned long); 1429 real64_stack.arg8 = va_arg(args, unsigned long); 1430 real64_stack.arg9 = va_arg(args, unsigned long); 1431 real64_stack.arg10 = va_arg(args, unsigned long); 1432 real64_stack.arg11 = va_arg(args, unsigned long); 1433 real64_stack.arg12 = va_arg(args, unsigned long); 1434 real64_stack.arg13 = va_arg(args, unsigned long); 1435 va_end(args); 1436 1437 return real64_call_asm(&real64_stack.sp, &real64_stack.arg0, fn); 1438} 1439 1440#endif /* CONFIG_64BIT */ 1441