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Linux/arch/parisc/kernel/firmware.c

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  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 
 73 static DEFINE_SPINLOCK(pdc_lock);
 74 extern unsigned long pdc_result[NUM_PDC_RESULT];
 75 extern 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. */
 83 int 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
 98 long real64_call(unsigned long function, ...);
 99 #endif
100 long 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  */
118 static 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  */
140 static 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
154 void __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  */
171 void __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
179 void __cpuinit set_firmware_width_unlocked(void) {
180         return;
181 }
182 
183 void __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  */
194 void 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  */
211 int 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 }
222 EXPORT_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  */
232 int __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
256 int 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  */
276 int 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  */
292 int 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 
305 int __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  */
326 int __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  */
349 int 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 }
365 EXPORT_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  */
376 int 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  */
403 int 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  */
426 int 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  */
448 int 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  */
478 int 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  */
499 int 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  */
521 int 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  */
546 int 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  */
566 int 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  */
588 int 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  */
616 int 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  */
640 int 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                 /* FIXME: else read MAC from NVRAM */
650                 memset(lan_addr, 0, PDC_LAN_STATION_ID_SIZE);
651         } else {
652                 memcpy(lan_addr, pdc_result, PDC_LAN_STATION_ID_SIZE);
653         }
654         spin_unlock_irqrestore(&pdc_lock, flags);
655 
656         return retval;
657 }
658 EXPORT_SYMBOL(pdc_lan_station_id);
659 
660 /**
661  * pdc_stable_read - Read data from Stable Storage.
662  * @staddr: Stable Storage address to access.
663  * @memaddr: The memory address where Stable Storage data shall be copied.
664  * @count: number of bytes to transfer. count is multiple of 4.
665  *
666  * This PDC call reads from the Stable Storage address supplied in staddr
667  * and copies count bytes to the memory address memaddr.
668  * The call will fail if staddr+count > PDC_STABLE size.
669  */
670 int pdc_stable_read(unsigned long staddr, void *memaddr, unsigned long count)
671 {
672        int retval;
673         unsigned long flags;
674 
675        spin_lock_irqsave(&pdc_lock, flags);
676        retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_READ, staddr,
677                __pa(pdc_result), count);
678        convert_to_wide(pdc_result);
679        memcpy(memaddr, pdc_result, count);
680        spin_unlock_irqrestore(&pdc_lock, flags);
681 
682        return retval;
683 }
684 EXPORT_SYMBOL(pdc_stable_read);
685 
686 /**
687  * pdc_stable_write - Write data to Stable Storage.
688  * @staddr: Stable Storage address to access.
689  * @memaddr: The memory address where Stable Storage data shall be read from.
690  * @count: number of bytes to transfer. count is multiple of 4.
691  *
692  * This PDC call reads count bytes from the supplied memaddr address,
693  * and copies count bytes to the Stable Storage address staddr.
694  * The call will fail if staddr+count > PDC_STABLE size.
695  */
696 int pdc_stable_write(unsigned long staddr, void *memaddr, unsigned long count)
697 {
698        int retval;
699         unsigned long flags;
700 
701        spin_lock_irqsave(&pdc_lock, flags);
702        memcpy(pdc_result, memaddr, count);
703        convert_to_wide(pdc_result);
704        retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_WRITE, staddr,
705                __pa(pdc_result), count);
706        spin_unlock_irqrestore(&pdc_lock, flags);
707 
708        return retval;
709 }
710 EXPORT_SYMBOL(pdc_stable_write);
711 
712 /**
713  * pdc_stable_get_size - Get Stable Storage size in bytes.
714  * @size: pointer where the size will be stored.
715  *
716  * This PDC call returns the number of bytes in the processor's Stable
717  * Storage, which is the number of contiguous bytes implemented in Stable
718  * Storage starting from staddr=0. size in an unsigned 64-bit integer
719  * which is a multiple of four.
720  */
721 int pdc_stable_get_size(unsigned long *size)
722 {
723        int retval;
724         unsigned long flags;
725 
726        spin_lock_irqsave(&pdc_lock, flags);
727        retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_RETURN_SIZE, __pa(pdc_result));
728        *size = pdc_result[0];
729        spin_unlock_irqrestore(&pdc_lock, flags);
730 
731        return retval;
732 }
733 EXPORT_SYMBOL(pdc_stable_get_size);
734 
735 /**
736  * pdc_stable_verify_contents - Checks that Stable Storage contents are valid.
737  *
738  * This PDC call is meant to be used to check the integrity of the current
739  * contents of Stable Storage.
740  */
741 int pdc_stable_verify_contents(void)
742 {
743        int retval;
744         unsigned long flags;
745 
746        spin_lock_irqsave(&pdc_lock, flags);
747        retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_VERIFY_CONTENTS);
748        spin_unlock_irqrestore(&pdc_lock, flags);
749 
750        return retval;
751 }
752 EXPORT_SYMBOL(pdc_stable_verify_contents);
753 
754 /**
755  * pdc_stable_initialize - Sets Stable Storage contents to zero and initialize
756  * the validity indicator.
757  *
758  * This PDC call will erase all contents of Stable Storage. Use with care!
759  */
760 int pdc_stable_initialize(void)
761 {
762        int retval;
763         unsigned long flags;
764 
765        spin_lock_irqsave(&pdc_lock, flags);
766        retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_INITIALIZE);
767        spin_unlock_irqrestore(&pdc_lock, flags);
768 
769        return retval;
770 }
771 EXPORT_SYMBOL(pdc_stable_initialize);
772 
773 /**
774  * pdc_get_initiator - Get the SCSI Interface Card params (SCSI ID, SDTR, SE or LVD)
775  * @hwpath: fully bc.mod style path to the device.
776  * @initiator: the array to return the result into
777  *
778  * Get the SCSI operational parameters from PDC.
779  * Needed since HPUX never used BIOS or symbios card NVRAM.
780  * Most ncr/sym cards won't have an entry and just use whatever
781  * capabilities of the card are (eg Ultra, LVD). But there are
782  * several cases where it's useful:
783  *    o set SCSI id for Multi-initiator clusters,
784  *    o cable too long (ie SE scsi 10Mhz won't support 6m length),
785  *    o bus width exported is less than what the interface chip supports.
786  */
787 int pdc_get_initiator(struct hardware_path *hwpath, struct pdc_initiator *initiator)
788 {
789         int retval;
790         unsigned long flags;
791 
792         spin_lock_irqsave(&pdc_lock, flags);
793 
794 /* BCJ-XXXX series boxes. E.G. "9000/785/C3000" */
795 #define IS_SPROCKETS() (strlen(boot_cpu_data.pdc.sys_model_name) == 14 && \
796         strncmp(boot_cpu_data.pdc.sys_model_name, "9000/785", 8) == 0)
797 
798         retval = mem_pdc_call(PDC_INITIATOR, PDC_GET_INITIATOR, 
799                               __pa(pdc_result), __pa(hwpath));
800         if (retval < PDC_OK)
801                 goto out;
802 
803         if (pdc_result[0] < 16) {
804                 initiator->host_id = pdc_result[0];
805         } else {
806                 initiator->host_id = -1;
807         }
808 
809         /*
810          * Sprockets and Piranha return 20 or 40 (MT/s).  Prelude returns
811          * 1, 2, 5 or 10 for 5, 10, 20 or 40 MT/s, respectively
812          */
813         switch (pdc_result[1]) {
814                 case  1: initiator->factor = 50; break;
815                 case  2: initiator->factor = 25; break;
816                 case  5: initiator->factor = 12; break;
817                 case 25: initiator->factor = 10; break;
818                 case 20: initiator->factor = 12; break;
819                 case 40: initiator->factor = 10; break;
820                 default: initiator->factor = -1; break;
821         }
822 
823         if (IS_SPROCKETS()) {
824                 initiator->width = pdc_result[4];
825                 initiator->mode = pdc_result[5];
826         } else {
827                 initiator->width = -1;
828                 initiator->mode = -1;
829         }
830 
831  out:
832         spin_unlock_irqrestore(&pdc_lock, flags);
833 
834         return (retval >= PDC_OK);
835 }
836 EXPORT_SYMBOL(pdc_get_initiator);
837 
838 
839 /**
840  * pdc_pci_irt_size - Get the number of entries in the interrupt routing table.
841  * @num_entries: The return value.
842  * @hpa: The HPA for the device.
843  *
844  * This PDC function returns the number of entries in the specified cell's
845  * interrupt table.
846  * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes
847  */ 
848 int pdc_pci_irt_size(unsigned long *num_entries, unsigned long hpa)
849 {
850         int retval;
851         unsigned long flags;
852 
853         spin_lock_irqsave(&pdc_lock, flags);
854         retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL_SIZE, 
855                               __pa(pdc_result), hpa);
856         convert_to_wide(pdc_result);
857         *num_entries = pdc_result[0];
858         spin_unlock_irqrestore(&pdc_lock, flags);
859 
860         return retval;
861 }
862 
863 /** 
864  * pdc_pci_irt - Get the PCI interrupt routing table.
865  * @num_entries: The number of entries in the table.
866  * @hpa: The Hard Physical Address of the device.
867  * @tbl: 
868  *
869  * Get the PCI interrupt routing table for the device at the given HPA.
870  * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes
871  */
872 int pdc_pci_irt(unsigned long num_entries, unsigned long hpa, void *tbl)
873 {
874         int retval;
875         unsigned long flags;
876 
877         BUG_ON((unsigned long)tbl & 0x7);
878 
879         spin_lock_irqsave(&pdc_lock, flags);
880         pdc_result[0] = num_entries;
881         retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL, 
882                               __pa(pdc_result), hpa, __pa(tbl));
883         spin_unlock_irqrestore(&pdc_lock, flags);
884 
885         return retval;
886 }
887 
888 
889 #if 0   /* UNTEST CODE - left here in case someone needs it */
890 
891 /** 
892  * pdc_pci_config_read - read PCI config space.
893  * @hpa         token from PDC to indicate which PCI device
894  * @pci_addr    configuration space address to read from
895  *
896  * Read PCI Configuration space *before* linux PCI subsystem is running.
897  */
898 unsigned int pdc_pci_config_read(void *hpa, unsigned long cfg_addr)
899 {
900         int retval;
901         unsigned long flags;
902 
903         spin_lock_irqsave(&pdc_lock, flags);
904         pdc_result[0] = 0;
905         pdc_result[1] = 0;
906         retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_READ_CONFIG, 
907                               __pa(pdc_result), hpa, cfg_addr&~3UL, 4UL);
908         spin_unlock_irqrestore(&pdc_lock, flags);
909 
910         return retval ? ~0 : (unsigned int) pdc_result[0];
911 }
912 
913 
914 /** 
915  * pdc_pci_config_write - read PCI config space.
916  * @hpa         token from PDC to indicate which PCI device
917  * @pci_addr    configuration space address to write
918  * @val         value we want in the 32-bit register
919  *
920  * Write PCI Configuration space *before* linux PCI subsystem is running.
921  */
922 void pdc_pci_config_write(void *hpa, unsigned long cfg_addr, unsigned int val)
923 {
924         int retval;
925         unsigned long flags;
926 
927         spin_lock_irqsave(&pdc_lock, flags);
928         pdc_result[0] = 0;
929         retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_WRITE_CONFIG, 
930                               __pa(pdc_result), hpa,
931                               cfg_addr&~3UL, 4UL, (unsigned long) val);
932         spin_unlock_irqrestore(&pdc_lock, flags);
933 
934         return retval;
935 }
936 #endif /* UNTESTED CODE */
937 
938 /**
939  * pdc_tod_read - Read the Time-Of-Day clock.
940  * @tod: The return buffer:
941  *
942  * Read the Time-Of-Day clock
943  */
944 int pdc_tod_read(struct pdc_tod *tod)
945 {
946         int retval;
947         unsigned long flags;
948 
949         spin_lock_irqsave(&pdc_lock, flags);
950         retval = mem_pdc_call(PDC_TOD, PDC_TOD_READ, __pa(pdc_result), 0);
951         convert_to_wide(pdc_result);
952         memcpy(tod, pdc_result, sizeof(*tod));
953         spin_unlock_irqrestore(&pdc_lock, flags);
954 
955         return retval;
956 }
957 EXPORT_SYMBOL(pdc_tod_read);
958 
959 /**
960  * pdc_tod_set - Set the Time-Of-Day clock.
961  * @sec: The number of seconds since epoch.
962  * @usec: The number of micro seconds.
963  *
964  * Set the Time-Of-Day clock.
965  */ 
966 int pdc_tod_set(unsigned long sec, unsigned long usec)
967 {
968         int retval;
969         unsigned long flags;
970 
971         spin_lock_irqsave(&pdc_lock, flags);
972         retval = mem_pdc_call(PDC_TOD, PDC_TOD_WRITE, sec, usec);
973         spin_unlock_irqrestore(&pdc_lock, flags);
974 
975         return retval;
976 }
977 EXPORT_SYMBOL(pdc_tod_set);
978 
979 #ifdef CONFIG_64BIT
980 int pdc_mem_mem_table(struct pdc_memory_table_raddr *r_addr,
981                 struct pdc_memory_table *tbl, unsigned long entries)
982 {
983         int retval;
984         unsigned long flags;
985 
986         spin_lock_irqsave(&pdc_lock, flags);
987         retval = mem_pdc_call(PDC_MEM, PDC_MEM_TABLE, __pa(pdc_result), __pa(pdc_result2), entries);
988         convert_to_wide(pdc_result);
989         memcpy(r_addr, pdc_result, sizeof(*r_addr));
990         memcpy(tbl, pdc_result2, entries * sizeof(*tbl));
991         spin_unlock_irqrestore(&pdc_lock, flags);
992 
993         return retval;
994 }
995 #endif /* CONFIG_64BIT */
996 
997 /* FIXME: Is this pdc used?  I could not find type reference to ftc_bitmap
998  * so I guessed at unsigned long.  Someone who knows what this does, can fix
999  * it later. :)
1000  */
1001 int pdc_do_firm_test_reset(unsigned long ftc_bitmap)
1002 {
1003         int retval;
1004         unsigned long flags;
1005 
1006         spin_lock_irqsave(&pdc_lock, flags);
1007         retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_FIRM_TEST_RESET,
1008                               PDC_FIRM_TEST_MAGIC, ftc_bitmap);
1009         spin_unlock_irqrestore(&pdc_lock, flags);
1010 
1011         return retval;
1012 }
1013 
1014 /*
1015  * pdc_do_reset - Reset the system.
1016  *
1017  * Reset the system.
1018  */
1019 int pdc_do_reset(void)
1020 {
1021         int retval;
1022         unsigned long flags;
1023 
1024         spin_lock_irqsave(&pdc_lock, flags);
1025         retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_RESET);
1026         spin_unlock_irqrestore(&pdc_lock, flags);
1027 
1028         return retval;
1029 }
1030 
1031 /*
1032  * pdc_soft_power_info - Enable soft power switch.
1033  * @power_reg: address of soft power register
1034  *
1035  * Return the absolute address of the soft power switch register
1036  */
1037 int __init pdc_soft_power_info(unsigned long *power_reg)
1038 {
1039         int retval;
1040         unsigned long flags;
1041 
1042         *power_reg = (unsigned long) (-1);
1043         
1044         spin_lock_irqsave(&pdc_lock, flags);
1045         retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_INFO, __pa(pdc_result), 0);
1046         if (retval == PDC_OK) {
1047                 convert_to_wide(pdc_result);
1048                 *power_reg = f_extend(pdc_result[0]);
1049         }
1050         spin_unlock_irqrestore(&pdc_lock, flags);
1051 
1052         return retval;
1053 }
1054 
1055 /*
1056  * pdc_soft_power_button - Control the soft power button behaviour
1057  * @sw_control: 0 for hardware control, 1 for software control 
1058  *
1059  *
1060  * This PDC function places the soft power button under software or
1061  * hardware control.
1062  * Under software control the OS may control to when to allow to shut 
1063  * down the system. Under hardware control pressing the power button 
1064  * powers off the system immediately.
1065  */
1066 int pdc_soft_power_button(int sw_control)
1067 {
1068         int retval;
1069         unsigned long flags;
1070 
1071         spin_lock_irqsave(&pdc_lock, flags);
1072         retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_ENABLE, __pa(pdc_result), sw_control);
1073         spin_unlock_irqrestore(&pdc_lock, flags);
1074 
1075         return retval;
1076 }
1077 
1078 /*
1079  * pdc_io_reset - Hack to avoid overlapping range registers of Bridges devices.
1080  * Primarily a problem on T600 (which parisc-linux doesn't support) but
1081  * who knows what other platform firmware might do with this OS "hook".
1082  */
1083 void pdc_io_reset(void)
1084 {
1085         unsigned long flags;
1086 
1087         spin_lock_irqsave(&pdc_lock, flags);
1088         mem_pdc_call(PDC_IO, PDC_IO_RESET, 0);
1089         spin_unlock_irqrestore(&pdc_lock, flags);
1090 }
1091 
1092 /*
1093  * pdc_io_reset_devices - Hack to Stop USB controller
1094  *
1095  * If PDC used the usb controller, the usb controller
1096  * is still running and will crash the machines during iommu 
1097  * setup, because of still running DMA. This PDC call
1098  * stops the USB controller.
1099  * Normally called after calling pdc_io_reset().
1100  */
1101 void pdc_io_reset_devices(void)
1102 {
1103         unsigned long flags;
1104 
1105         spin_lock_irqsave(&pdc_lock, flags);
1106         mem_pdc_call(PDC_IO, PDC_IO_RESET_DEVICES, 0);
1107         spin_unlock_irqrestore(&pdc_lock, flags);
1108 }
1109 
1110 /* locked by pdc_console_lock */
1111 static int __attribute__((aligned(8)))   iodc_retbuf[32];
1112 static char __attribute__((aligned(64))) iodc_dbuf[4096];
1113 
1114 /**
1115  * pdc_iodc_print - Console print using IODC.
1116  * @str: the string to output.
1117  * @count: length of str
1118  *
1119  * Note that only these special chars are architected for console IODC io:
1120  * BEL, BS, CR, and LF. Others are passed through.
1121  * Since the HP console requires CR+LF to perform a 'newline', we translate
1122  * "\n" to "\r\n".
1123  */
1124 int pdc_iodc_print(const unsigned char *str, unsigned count)
1125 {
1126         unsigned int i;
1127         unsigned long flags;
1128 
1129         for (i = 0; i < count;) {
1130                 switch(str[i]) {
1131                 case '\n':
1132                         iodc_dbuf[i+0] = '\r';
1133                         iodc_dbuf[i+1] = '\n';
1134                         i += 2;
1135                         goto print;
1136                 default:
1137                         iodc_dbuf[i] = str[i];
1138                         i++;
1139                         break;
1140                 }
1141         }
1142 
1143 print:
1144         spin_lock_irqsave(&pdc_lock, flags);
1145         real32_call(PAGE0->mem_cons.iodc_io,
1146                     (unsigned long)PAGE0->mem_cons.hpa, ENTRY_IO_COUT,
1147                     PAGE0->mem_cons.spa, __pa(PAGE0->mem_cons.dp.layers),
1148                     __pa(iodc_retbuf), 0, __pa(iodc_dbuf), i, 0);
1149         spin_unlock_irqrestore(&pdc_lock, flags);
1150 
1151         return i;
1152 }
1153 
1154 /**
1155  * pdc_iodc_getc - Read a character (non-blocking) from the PDC console.
1156  *
1157  * Read a character (non-blocking) from the PDC console, returns -1 if
1158  * key is not present.
1159  */
1160 int pdc_iodc_getc(void)
1161 {
1162         int ch;
1163         int status;
1164         unsigned long flags;
1165 
1166         /* Bail if no console input device. */
1167         if (!PAGE0->mem_kbd.iodc_io)
1168                 return 0;
1169         
1170         /* wait for a keyboard (rs232)-input */
1171         spin_lock_irqsave(&pdc_lock, flags);
1172         real32_call(PAGE0->mem_kbd.iodc_io,
1173                     (unsigned long)PAGE0->mem_kbd.hpa, ENTRY_IO_CIN,
1174                     PAGE0->mem_kbd.spa, __pa(PAGE0->mem_kbd.dp.layers), 
1175                     __pa(iodc_retbuf), 0, __pa(iodc_dbuf), 1, 0);
1176 
1177         ch = *iodc_dbuf;
1178         status = *iodc_retbuf;
1179         spin_unlock_irqrestore(&pdc_lock, flags);
1180 
1181         if (status == 0)
1182             return -1;
1183         
1184         return ch;
1185 }
1186 
1187 int pdc_sti_call(unsigned long func, unsigned long flags,
1188                  unsigned long inptr, unsigned long outputr,
1189                  unsigned long glob_cfg)
1190 {
1191         int retval;
1192         unsigned long irqflags;
1193 
1194         spin_lock_irqsave(&pdc_lock, irqflags);  
1195         retval = real32_call(func, flags, inptr, outputr, glob_cfg);
1196         spin_unlock_irqrestore(&pdc_lock, irqflags);
1197 
1198         return retval;
1199 }
1200 EXPORT_SYMBOL(pdc_sti_call);
1201 
1202 #ifdef CONFIG_64BIT
1203 /**
1204  * pdc_pat_cell_get_number - Returns the cell number.
1205  * @cell_info: The return buffer.
1206  *
1207  * This PDC call returns the cell number of the cell from which the call
1208  * is made.
1209  */
1210 int pdc_pat_cell_get_number(struct pdc_pat_cell_num *cell_info)
1211 {
1212         int retval;
1213         unsigned long flags;
1214 
1215         spin_lock_irqsave(&pdc_lock, flags);
1216         retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_GET_NUMBER, __pa(pdc_result));
1217         memcpy(cell_info, pdc_result, sizeof(*cell_info));
1218         spin_unlock_irqrestore(&pdc_lock, flags);
1219 
1220         return retval;
1221 }
1222 
1223 /**
1224  * pdc_pat_cell_module - Retrieve the cell's module information.
1225  * @actcnt: The number of bytes written to mem_addr.
1226  * @ploc: The physical location.
1227  * @mod: The module index.
1228  * @view_type: The view of the address type.
1229  * @mem_addr: The return buffer.
1230  *
1231  * This PDC call returns information about each module attached to the cell
1232  * at the specified location.
1233  */
1234 int pdc_pat_cell_module(unsigned long *actcnt, unsigned long ploc, unsigned long mod,
1235                         unsigned long view_type, void *mem_addr)
1236 {
1237         int retval;
1238         unsigned long flags;
1239         static struct pdc_pat_cell_mod_maddr_block result __attribute__ ((aligned (8)));
1240 
1241         spin_lock_irqsave(&pdc_lock, flags);
1242         retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_MODULE, __pa(pdc_result), 
1243                               ploc, mod, view_type, __pa(&result));
1244         if(!retval) {
1245                 *actcnt = pdc_result[0];
1246                 memcpy(mem_addr, &result, *actcnt);
1247         }
1248         spin_unlock_irqrestore(&pdc_lock, flags);
1249 
1250         return retval;
1251 }
1252 
1253 /**
1254  * pdc_pat_cpu_get_number - Retrieve the cpu number.
1255  * @cpu_info: The return buffer.
1256  * @hpa: The Hard Physical Address of the CPU.
1257  *
1258  * Retrieve the cpu number for the cpu at the specified HPA.
1259  */
1260 int pdc_pat_cpu_get_number(struct pdc_pat_cpu_num *cpu_info, void *hpa)
1261 {
1262         int retval;
1263         unsigned long flags;
1264 
1265         spin_lock_irqsave(&pdc_lock, flags);
1266         retval = mem_pdc_call(PDC_PAT_CPU, PDC_PAT_CPU_GET_NUMBER,
1267                               __pa(&pdc_result), hpa);
1268         memcpy(cpu_info, pdc_result, sizeof(*cpu_info));
1269         spin_unlock_irqrestore(&pdc_lock, flags);
1270 
1271         return retval;
1272 }
1273 
1274 /**
1275  * pdc_pat_get_irt_size - Retrieve the number of entries in the cell's interrupt table.
1276  * @num_entries: The return value.
1277  * @cell_num: The target cell.
1278  *
1279  * This PDC function returns the number of entries in the specified cell's
1280  * interrupt table.
1281  */
1282 int pdc_pat_get_irt_size(unsigned long *num_entries, unsigned long cell_num)
1283 {
1284         int retval;
1285         unsigned long flags;
1286 
1287         spin_lock_irqsave(&pdc_lock, flags);
1288         retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE_SIZE,
1289                               __pa(pdc_result), cell_num);
1290         *num_entries = pdc_result[0];
1291         spin_unlock_irqrestore(&pdc_lock, flags);
1292 
1293         return retval;
1294 }
1295 
1296 /**
1297  * pdc_pat_get_irt - Retrieve the cell's interrupt table.
1298  * @r_addr: The return buffer.
1299  * @cell_num: The target cell.
1300  *
1301  * This PDC function returns the actual interrupt table for the specified cell.
1302  */
1303 int pdc_pat_get_irt(void *r_addr, unsigned long cell_num)
1304 {
1305         int retval;
1306         unsigned long flags;
1307 
1308         spin_lock_irqsave(&pdc_lock, flags);
1309         retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE,
1310                               __pa(r_addr), cell_num);
1311         spin_unlock_irqrestore(&pdc_lock, flags);
1312 
1313         return retval;
1314 }
1315 
1316 /**
1317  * pdc_pat_pd_get_addr_map - Retrieve information about memory address ranges.
1318  * @actlen: The return buffer.
1319  * @mem_addr: Pointer to the memory buffer.
1320  * @count: The number of bytes to read from the buffer.
1321  * @offset: The offset with respect to the beginning of the buffer.
1322  *
1323  */
1324 int pdc_pat_pd_get_addr_map(unsigned long *actual_len, void *mem_addr, 
1325                             unsigned long count, unsigned long offset)
1326 {
1327         int retval;
1328         unsigned long flags;
1329 
1330         spin_lock_irqsave(&pdc_lock, flags);
1331         retval = mem_pdc_call(PDC_PAT_PD, PDC_PAT_PD_GET_ADDR_MAP, __pa(pdc_result), 
1332                               __pa(pdc_result2), count, offset);
1333         *actual_len = pdc_result[0];
1334         memcpy(mem_addr, pdc_result2, *actual_len);
1335         spin_unlock_irqrestore(&pdc_lock, flags);
1336 
1337         return retval;
1338 }
1339 
1340 /**
1341  * pdc_pat_io_pci_cfg_read - Read PCI configuration space.
1342  * @pci_addr: PCI configuration space address for which the read request is being made.
1343  * @pci_size: Size of read in bytes. Valid values are 1, 2, and 4. 
1344  * @mem_addr: Pointer to return memory buffer.
1345  *
1346  */
1347 int pdc_pat_io_pci_cfg_read(unsigned long pci_addr, int pci_size, u32 *mem_addr)
1348 {
1349         int retval;
1350         unsigned long flags;
1351 
1352         spin_lock_irqsave(&pdc_lock, flags);
1353         retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_READ,
1354                                         __pa(pdc_result), pci_addr, pci_size);
1355         switch(pci_size) {
1356                 case 1: *(u8 *) mem_addr =  (u8)  pdc_result[0];
1357                 case 2: *(u16 *)mem_addr =  (u16) pdc_result[0];
1358                 case 4: *(u32 *)mem_addr =  (u32) pdc_result[0];
1359         }
1360         spin_unlock_irqrestore(&pdc_lock, flags);
1361 
1362         return retval;
1363 }
1364 
1365 /**
1366  * pdc_pat_io_pci_cfg_write - Retrieve information about memory address ranges.
1367  * @pci_addr: PCI configuration space address for which the write  request is being made.
1368  * @pci_size: Size of write in bytes. Valid values are 1, 2, and 4. 
1369  * @value: Pointer to 1, 2, or 4 byte value in low order end of argument to be 
1370  *         written to PCI Config space.
1371  *
1372  */
1373 int pdc_pat_io_pci_cfg_write(unsigned long pci_addr, int pci_size, u32 val)
1374 {
1375         int retval;
1376         unsigned long flags;
1377 
1378         spin_lock_irqsave(&pdc_lock, flags);
1379         retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_WRITE,
1380                                 pci_addr, pci_size, val);
1381         spin_unlock_irqrestore(&pdc_lock, flags);
1382 
1383         return retval;
1384 }
1385 #endif /* CONFIG_64BIT */
1386 
1387 
1388 /***************** 32-bit real-mode calls ***********/
1389 /* The struct below is used
1390  * to overlay real_stack (real2.S), preparing a 32-bit call frame.
1391  * real32_call_asm() then uses this stack in narrow real mode
1392  */
1393 
1394 struct narrow_stack {
1395         /* use int, not long which is 64 bits */
1396         unsigned int arg13;
1397         unsigned int arg12;
1398         unsigned int arg11;
1399         unsigned int arg10;
1400         unsigned int arg9;
1401         unsigned int arg8;
1402         unsigned int arg7;
1403         unsigned int arg6;
1404         unsigned int arg5;
1405         unsigned int arg4;
1406         unsigned int arg3;
1407         unsigned int arg2;
1408         unsigned int arg1;
1409         unsigned int arg0;
1410         unsigned int frame_marker[8];
1411         unsigned int sp;
1412         /* in reality, there's nearly 8k of stack after this */
1413 };
1414 
1415 long real32_call(unsigned long fn, ...)
1416 {
1417         va_list args;
1418         extern struct narrow_stack real_stack;
1419         extern unsigned long real32_call_asm(unsigned int *,
1420                                              unsigned int *, 
1421                                              unsigned int);
1422         
1423         va_start(args, fn);
1424         real_stack.arg0 = va_arg(args, unsigned int);
1425         real_stack.arg1 = va_arg(args, unsigned int);
1426         real_stack.arg2 = va_arg(args, unsigned int);
1427         real_stack.arg3 = va_arg(args, unsigned int);
1428         real_stack.arg4 = va_arg(args, unsigned int);
1429         real_stack.arg5 = va_arg(args, unsigned int);
1430         real_stack.arg6 = va_arg(args, unsigned int);
1431         real_stack.arg7 = va_arg(args, unsigned int);
1432         real_stack.arg8 = va_arg(args, unsigned int);
1433         real_stack.arg9 = va_arg(args, unsigned int);
1434         real_stack.arg10 = va_arg(args, unsigned int);
1435         real_stack.arg11 = va_arg(args, unsigned int);
1436         real_stack.arg12 = va_arg(args, unsigned int);
1437         real_stack.arg13 = va_arg(args, unsigned int);
1438         va_end(args);
1439         
1440         return real32_call_asm(&real_stack.sp, &real_stack.arg0, fn);
1441 }
1442 
1443 #ifdef CONFIG_64BIT
1444 /***************** 64-bit real-mode calls ***********/
1445 
1446 struct wide_stack {
1447         unsigned long arg0;
1448         unsigned long arg1;
1449         unsigned long arg2;
1450         unsigned long arg3;
1451         unsigned long arg4;
1452         unsigned long arg5;
1453         unsigned long arg6;
1454         unsigned long arg7;
1455         unsigned long arg8;
1456         unsigned long arg9;
1457         unsigned long arg10;
1458         unsigned long arg11;
1459         unsigned long arg12;
1460         unsigned long arg13;
1461         unsigned long frame_marker[2];  /* rp, previous sp */
1462         unsigned long sp;
1463         /* in reality, there's nearly 8k of stack after this */
1464 };
1465 
1466 long real64_call(unsigned long fn, ...)
1467 {
1468         va_list args;
1469         extern struct wide_stack real64_stack;
1470         extern unsigned long real64_call_asm(unsigned long *,
1471                                              unsigned long *, 
1472                                              unsigned long);
1473     
1474         va_start(args, fn);
1475         real64_stack.arg0 = va_arg(args, unsigned long);
1476         real64_stack.arg1 = va_arg(args, unsigned long);
1477         real64_stack.arg2 = va_arg(args, unsigned long);
1478         real64_stack.arg3 = va_arg(args, unsigned long);
1479         real64_stack.arg4 = va_arg(args, unsigned long);
1480         real64_stack.arg5 = va_arg(args, unsigned long);
1481         real64_stack.arg6 = va_arg(args, unsigned long);
1482         real64_stack.arg7 = va_arg(args, unsigned long);
1483         real64_stack.arg8 = va_arg(args, unsigned long);
1484         real64_stack.arg9 = va_arg(args, unsigned long);
1485         real64_stack.arg10 = va_arg(args, unsigned long);
1486         real64_stack.arg11 = va_arg(args, unsigned long);
1487         real64_stack.arg12 = va_arg(args, unsigned long);
1488         real64_stack.arg13 = va_arg(args, unsigned long);
1489         va_end(args);
1490         
1491         return real64_call_asm(&real64_stack.sp, &real64_stack.arg0, fn);
1492 }
1493 
1494 #endif /* CONFIG_64BIT */
1495 
1496 

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