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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/processor.h> /* for boot_cpu_data */
71
72static DEFINE_SPINLOCK(pdc_lock);
73extern unsigned long pdc_result[NUM_PDC_RESULT];
74extern unsigned long pdc_result2[NUM_PDC_RESULT];
75
76#ifdef CONFIG_64BIT
77#define WIDE_FIRMWARE 0x1
78#define NARROW_FIRMWARE 0x2
79
80/* Firmware needs to be initially set to narrow to determine the
81 * actual firmware width. */
82int parisc_narrow_firmware __read_mostly = 1;
83#endif
84
85/* On most currently-supported platforms, IODC I/O calls are 32-bit calls
86 * and MEM_PDC calls are always the same width as the OS.
87 * Some PAT boxes may have 64-bit IODC I/O.
88 *
89 * Ryan Bradetich added the now obsolete CONFIG_PDC_NARROW to allow
90 * 64-bit kernels to run on systems with 32-bit MEM_PDC calls.
91 * This allowed wide kernels to run on Cxxx boxes.
92 * We now detect 32-bit-only PDC and dynamically switch to 32-bit mode
93 * when running a 64-bit kernel on such boxes (e.g. C200 or C360).
94 */
95
96#ifdef CONFIG_64BIT
97long real64_call(unsigned long function, ...);
98#endif
99long real32_call(unsigned long function, ...);
100
101#ifdef CONFIG_64BIT
102# define MEM_PDC (unsigned long)(PAGE0->mem_pdc_hi) << 32 | PAGE0->mem_pdc
103# define mem_pdc_call(args...) unlikely(parisc_narrow_firmware) ? real32_call(MEM_PDC, args) : real64_call(MEM_PDC, args)
104#else
105# define MEM_PDC (unsigned long)PAGE0->mem_pdc
106# define mem_pdc_call(args...) real32_call(MEM_PDC, args)
107#endif
108
109
110/**
111 * f_extend - Convert PDC addresses to kernel addresses.
112 * @address: Address returned from PDC.
113 *
114 * This function is used to convert PDC addresses into kernel addresses
115 * when the PDC address size and kernel address size are different.
116 */
117static unsigned long f_extend(unsigned long address)
118{
119#ifdef CONFIG_64BIT
120 if(unlikely(parisc_narrow_firmware)) {
121 if((address & 0xff000000) == 0xf0000000)
122 return 0xf0f0f0f000000000UL | (u32)address;
123
124 if((address & 0xf0000000) == 0xf0000000)
125 return 0xffffffff00000000UL | (u32)address;
126 }
127#endif
128 return address;
129}
130
131/**
132 * convert_to_wide - Convert the return buffer addresses into kernel addresses.
133 * @address: The return buffer from PDC.
134 *
135 * This function is used to convert the return buffer addresses retrieved from PDC
136 * into kernel addresses when the PDC address size and kernel address size are
137 * different.
138 */
139static void convert_to_wide(unsigned long *addr)
140{
141#ifdef CONFIG_64BIT
142 int i;
143 unsigned int *p = (unsigned int *)addr;
144
145 if(unlikely(parisc_narrow_firmware)) {
146 for(i = 31; i >= 0; --i)
147 addr[i] = p[i];
148 }
149#endif
150}
151
152#ifdef CONFIG_64BIT
153void set_firmware_width_unlocked(void)
154{
155 int ret;
156
157 ret = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES,
158 __pa(pdc_result), 0);
159 convert_to_wide(pdc_result);
160 if (pdc_result[0] != NARROW_FIRMWARE)
161 parisc_narrow_firmware = 0;
162}
163
164/**
165 * set_firmware_width - Determine if the firmware is wide or narrow.
166 *
167 * This function must be called before any pdc_* function that uses the
168 * convert_to_wide function.
169 */
170void set_firmware_width(void)
171{
172 unsigned long flags;
173 spin_lock_irqsave(&pdc_lock, flags);
174 set_firmware_width_unlocked();
175 spin_unlock_irqrestore(&pdc_lock, flags);
176}
177#else
178void set_firmware_width_unlocked(void)
179{
180 return;
181}
182
183void set_firmware_width(void)
184{
185 return;
186}
187#endif /*CONFIG_64BIT*/
188
189/**
190 * pdc_emergency_unlock - Unlock the linux pdc lock
191 *
192 * This call unlocks the linux pdc lock in case we need some PDC functions
193 * (like pdc_add_valid) during kernel stack dump.
194 */
195void pdc_emergency_unlock(void)
196{
197 /* Spinlock DEBUG code freaks out if we unconditionally unlock */
198 if (spin_is_locked(&pdc_lock))
199 spin_unlock(&pdc_lock);
200}
201
202
203/**
204 * pdc_add_valid - Verify address can be accessed without causing a HPMC.
205 * @address: Address to be verified.
206 *
207 * This PDC call attempts to read from the specified address and verifies
208 * if the address is valid.
209 *
210 * The return value is PDC_OK (0) in case accessing this address is valid.
211 */
212int pdc_add_valid(unsigned long address)
213{
214 int retval;
215 unsigned long flags;
216
217 spin_lock_irqsave(&pdc_lock, flags);
218 retval = mem_pdc_call(PDC_ADD_VALID, PDC_ADD_VALID_VERIFY, address);
219 spin_unlock_irqrestore(&pdc_lock, flags);
220
221 return retval;
222}
223EXPORT_SYMBOL(pdc_add_valid);
224
225/**
226 * pdc_chassis_info - Return chassis information.
227 * @result: The return buffer.
228 * @chassis_info: The memory buffer address.
229 * @len: The size of the memory buffer address.
230 *
231 * An HVERSION dependent call for returning the chassis information.
232 */
233int __init pdc_chassis_info(struct pdc_chassis_info *chassis_info, void *led_info, unsigned long len)
234{
235 int retval;
236 unsigned long flags;
237
238 spin_lock_irqsave(&pdc_lock, flags);
239 memcpy(&pdc_result, chassis_info, sizeof(*chassis_info));
240 memcpy(&pdc_result2, led_info, len);
241 retval = mem_pdc_call(PDC_CHASSIS, PDC_RETURN_CHASSIS_INFO,
242 __pa(pdc_result), __pa(pdc_result2), len);
243 memcpy(chassis_info, pdc_result, sizeof(*chassis_info));
244 memcpy(led_info, pdc_result2, len);
245 spin_unlock_irqrestore(&pdc_lock, flags);
246
247 return retval;
248}
249
250/**
251 * pdc_pat_chassis_send_log - Sends a PDC PAT CHASSIS log message.
252 * @retval: -1 on error, 0 on success. Other value are PDC errors
253 *
254 * Must be correctly formatted or expect system crash
255 */
256#ifdef CONFIG_64BIT
257int pdc_pat_chassis_send_log(unsigned long state, unsigned long data)
258{
259 int retval = 0;
260 unsigned long flags;
261
262 if (!is_pdc_pat())
263 return -1;
264
265 spin_lock_irqsave(&pdc_lock, flags);
266 retval = mem_pdc_call(PDC_PAT_CHASSIS_LOG, PDC_PAT_CHASSIS_WRITE_LOG, __pa(&state), __pa(&data));
267 spin_unlock_irqrestore(&pdc_lock, flags);
268
269 return retval;
270}
271#endif
272
273/**
274 * pdc_chassis_disp - Updates chassis code
275 * @retval: -1 on error, 0 on success
276 */
277int pdc_chassis_disp(unsigned long disp)
278{
279 int retval = 0;
280 unsigned long flags;
281
282 spin_lock_irqsave(&pdc_lock, flags);
283 retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_DISP, disp);
284 spin_unlock_irqrestore(&pdc_lock, flags);
285
286 return retval;
287}
288
289/**
290 * pdc_chassis_warn - Fetches chassis warnings
291 * @retval: -1 on error, 0 on success
292 */
293int pdc_chassis_warn(unsigned long *warn)
294{
295 int retval = 0;
296 unsigned long flags;
297
298 spin_lock_irqsave(&pdc_lock, flags);
299 retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_WARN, __pa(pdc_result));
300 *warn = pdc_result[0];
301 spin_unlock_irqrestore(&pdc_lock, flags);
302
303 return retval;
304}
305
306int pdc_coproc_cfg_unlocked(struct pdc_coproc_cfg *pdc_coproc_info)
307{
308 int ret;
309
310 ret = mem_pdc_call(PDC_COPROC, PDC_COPROC_CFG, __pa(pdc_result));
311 convert_to_wide(pdc_result);
312 pdc_coproc_info->ccr_functional = pdc_result[0];
313 pdc_coproc_info->ccr_present = pdc_result[1];
314 pdc_coproc_info->revision = pdc_result[17];
315 pdc_coproc_info->model = pdc_result[18];
316
317 return ret;
318}
319
320/**
321 * pdc_coproc_cfg - To identify coprocessors attached to the processor.
322 * @pdc_coproc_info: Return buffer address.
323 *
324 * This PDC call returns the presence and status of all the coprocessors
325 * attached to the processor.
326 */
327int pdc_coproc_cfg(struct pdc_coproc_cfg *pdc_coproc_info)
328{
329 int ret;
330 unsigned long flags;
331
332 spin_lock_irqsave(&pdc_lock, flags);
333 ret = pdc_coproc_cfg_unlocked(pdc_coproc_info);
334 spin_unlock_irqrestore(&pdc_lock, flags);
335
336 return ret;
337}
338
339/**
340 * pdc_iodc_read - Read data from the modules IODC.
341 * @actcnt: The actual number of bytes.
342 * @hpa: The HPA of the module for the iodc read.
343 * @index: The iodc entry point.
344 * @iodc_data: A buffer memory for the iodc options.
345 * @iodc_data_size: Size of the memory buffer.
346 *
347 * This PDC call reads from the IODC of the module specified by the hpa
348 * argument.
349 */
350int pdc_iodc_read(unsigned long *actcnt, unsigned long hpa, unsigned int index,
351 void *iodc_data, unsigned int iodc_data_size)
352{
353 int retval;
354 unsigned long flags;
355
356 spin_lock_irqsave(&pdc_lock, flags);
357 retval = mem_pdc_call(PDC_IODC, PDC_IODC_READ, __pa(pdc_result), hpa,
358 index, __pa(pdc_result2), iodc_data_size);
359 convert_to_wide(pdc_result);
360 *actcnt = pdc_result[0];
361 memcpy(iodc_data, pdc_result2, iodc_data_size);
362 spin_unlock_irqrestore(&pdc_lock, flags);
363
364 return retval;
365}
366EXPORT_SYMBOL(pdc_iodc_read);
367
368/**
369 * pdc_system_map_find_mods - Locate unarchitected modules.
370 * @pdc_mod_info: Return buffer address.
371 * @mod_path: pointer to dev path structure.
372 * @mod_index: fixed address module index.
373 *
374 * To locate and identify modules which reside at fixed I/O addresses, which
375 * do not self-identify via architected bus walks.
376 */
377int pdc_system_map_find_mods(struct pdc_system_map_mod_info *pdc_mod_info,
378 struct pdc_module_path *mod_path, long mod_index)
379{
380 int retval;
381 unsigned long flags;
382
383 spin_lock_irqsave(&pdc_lock, flags);
384 retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_MODULE, __pa(pdc_result),
385 __pa(pdc_result2), mod_index);
386 convert_to_wide(pdc_result);
387 memcpy(pdc_mod_info, pdc_result, sizeof(*pdc_mod_info));
388 memcpy(mod_path, pdc_result2, sizeof(*mod_path));
389 spin_unlock_irqrestore(&pdc_lock, flags);
390
391 pdc_mod_info->mod_addr = f_extend(pdc_mod_info->mod_addr);
392 return retval;
393}
394
395/**
396 * pdc_system_map_find_addrs - Retrieve additional address ranges.
397 * @pdc_addr_info: Return buffer address.
398 * @mod_index: Fixed address module index.
399 * @addr_index: Address range index.
400 *
401 * Retrieve additional information about subsequent address ranges for modules
402 * with multiple address ranges.
403 */
404int pdc_system_map_find_addrs(struct pdc_system_map_addr_info *pdc_addr_info,
405 long mod_index, long addr_index)
406{
407 int retval;
408 unsigned long flags;
409
410 spin_lock_irqsave(&pdc_lock, flags);
411 retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_ADDRESS, __pa(pdc_result),
412 mod_index, addr_index);
413 convert_to_wide(pdc_result);
414 memcpy(pdc_addr_info, pdc_result, sizeof(*pdc_addr_info));
415 spin_unlock_irqrestore(&pdc_lock, flags);
416
417 pdc_addr_info->mod_addr = f_extend(pdc_addr_info->mod_addr);
418 return retval;
419}
420
421/**
422 * pdc_model_info - Return model information about the processor.
423 * @model: The return buffer.
424 *
425 * Returns the version numbers, identifiers, and capabilities from the processor module.
426 */
427int pdc_model_info(struct pdc_model *model)
428{
429 int retval;
430 unsigned long flags;
431
432 spin_lock_irqsave(&pdc_lock, flags);
433 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_INFO, __pa(pdc_result), 0);
434 convert_to_wide(pdc_result);
435 memcpy(model, pdc_result, sizeof(*model));
436 spin_unlock_irqrestore(&pdc_lock, flags);
437
438 return retval;
439}
440
441/**
442 * pdc_model_sysmodel - Get the system model name.
443 * @name: A char array of at least 81 characters.
444 *
445 * Get system model name from PDC ROM (e.g. 9000/715 or 9000/778/B160L).
446 * Using OS_ID_HPUX will return the equivalent of the 'modelname' command
447 * on HP/UX.
448 */
449int pdc_model_sysmodel(char *name)
450{
451 int retval;
452 unsigned long flags;
453
454 spin_lock_irqsave(&pdc_lock, flags);
455 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_SYSMODEL, __pa(pdc_result),
456 OS_ID_HPUX, __pa(name));
457 convert_to_wide(pdc_result);
458
459 if (retval == PDC_OK) {
460 name[pdc_result[0]] = '\0'; /* add trailing '\0' */
461 } else {
462 name[0] = 0;
463 }
464 spin_unlock_irqrestore(&pdc_lock, flags);
465
466 return retval;
467}
468
469/**
470 * pdc_model_versions - Identify the version number of each processor.
471 * @cpu_id: The return buffer.
472 * @id: The id of the processor to check.
473 *
474 * Returns the version number for each processor component.
475 *
476 * This comment was here before, but I do not know what it means :( -RB
477 * id: 0 = cpu revision, 1 = boot-rom-version
478 */
479int pdc_model_versions(unsigned long *versions, int id)
480{
481 int retval;
482 unsigned long flags;
483
484 spin_lock_irqsave(&pdc_lock, flags);
485 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_VERSIONS, __pa(pdc_result), id);
486 convert_to_wide(pdc_result);
487 *versions = pdc_result[0];
488 spin_unlock_irqrestore(&pdc_lock, flags);
489
490 return retval;
491}
492
493/**
494 * pdc_model_cpuid - Returns the CPU_ID.
495 * @cpu_id: The return buffer.
496 *
497 * Returns the CPU_ID value which uniquely identifies the cpu portion of
498 * the processor module.
499 */
500int pdc_model_cpuid(unsigned long *cpu_id)
501{
502 int retval;
503 unsigned long flags;
504
505 spin_lock_irqsave(&pdc_lock, flags);
506 pdc_result[0] = 0; /* preset zero (call may not be implemented!) */
507 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CPU_ID, __pa(pdc_result), 0);
508 convert_to_wide(pdc_result);
509 *cpu_id = pdc_result[0];
510 spin_unlock_irqrestore(&pdc_lock, flags);
511
512 return retval;
513}
514
515/**
516 * pdc_model_capabilities - Returns the platform capabilities.
517 * @capabilities: The return buffer.
518 *
519 * Returns information about platform support for 32- and/or 64-bit
520 * OSes, IO-PDIR coherency, and virtual aliasing.
521 */
522int pdc_model_capabilities(unsigned long *capabilities)
523{
524 int retval;
525 unsigned long flags;
526
527 spin_lock_irqsave(&pdc_lock, flags);
528 pdc_result[0] = 0; /* preset zero (call may not be implemented!) */
529 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES, __pa(pdc_result), 0);
530 convert_to_wide(pdc_result);
531 if (retval == PDC_OK) {
532 *capabilities = pdc_result[0];
533 } else {
534 *capabilities = PDC_MODEL_OS32;
535 }
536 spin_unlock_irqrestore(&pdc_lock, flags);
537
538 return retval;
539}
540
541/**
542 * pdc_cache_info - Return cache and TLB information.
543 * @cache_info: The return buffer.
544 *
545 * Returns information about the processor's cache and TLB.
546 */
547int pdc_cache_info(struct pdc_cache_info *cache_info)
548{
549 int retval;
550 unsigned long flags;
551
552 spin_lock_irqsave(&pdc_lock, flags);
553 retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_INFO, __pa(pdc_result), 0);
554 convert_to_wide(pdc_result);
555 memcpy(cache_info, pdc_result, sizeof(*cache_info));
556 spin_unlock_irqrestore(&pdc_lock, flags);
557
558 return retval;
559}
560
561/**
562 * pdc_spaceid_bits - Return whether Space ID hashing is turned on.
563 * @space_bits: Should be 0, if not, bad mojo!
564 *
565 * Returns information about Space ID hashing.
566 */
567int pdc_spaceid_bits(unsigned long *space_bits)
568{
569 int retval;
570 unsigned long flags;
571
572 spin_lock_irqsave(&pdc_lock, flags);
573 pdc_result[0] = 0;
574 retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_RET_SPID, __pa(pdc_result), 0);
575 convert_to_wide(pdc_result);
576 *space_bits = pdc_result[0];
577 spin_unlock_irqrestore(&pdc_lock, flags);
578
579 return retval;
580}
581
582#ifndef CONFIG_PA20
583/**
584 * pdc_btlb_info - Return block TLB information.
585 * @btlb: The return buffer.
586 *
587 * Returns information about the hardware Block TLB.
588 */
589int pdc_btlb_info(struct pdc_btlb_info *btlb)
590{
591 int retval;
592 unsigned long flags;
593
594 spin_lock_irqsave(&pdc_lock, flags);
595 retval = mem_pdc_call(PDC_BLOCK_TLB, PDC_BTLB_INFO, __pa(pdc_result), 0);
596 memcpy(btlb, pdc_result, sizeof(*btlb));
597 spin_unlock_irqrestore(&pdc_lock, flags);
598
599 if(retval < 0) {
600 btlb->max_size = 0;
601 }
602 return retval;
603}
604
605/**
606 * pdc_mem_map_hpa - Find fixed module information.
607 * @address: The return buffer
608 * @mod_path: pointer to dev path structure.
609 *
610 * This call was developed for S700 workstations to allow the kernel to find
611 * the I/O devices (Core I/O). In the future (Kittyhawk and beyond) this
612 * call will be replaced (on workstations) by the architected PDC_SYSTEM_MAP
613 * call.
614 *
615 * This call is supported by all existing S700 workstations (up to Gecko).
616 */
617int pdc_mem_map_hpa(struct pdc_memory_map *address,
618 struct pdc_module_path *mod_path)
619{
620 int retval;
621 unsigned long flags;
622
623 spin_lock_irqsave(&pdc_lock, flags);
624 memcpy(pdc_result2, mod_path, sizeof(*mod_path));
625 retval = mem_pdc_call(PDC_MEM_MAP, PDC_MEM_MAP_HPA, __pa(pdc_result),
626 __pa(pdc_result2));
627 memcpy(address, pdc_result, sizeof(*address));
628 spin_unlock_irqrestore(&pdc_lock, flags);
629
630 return retval;
631}
632#endif /* !CONFIG_PA20 */
633
634/**
635 * pdc_lan_station_id - Get the LAN address.
636 * @lan_addr: The return buffer.
637 * @hpa: The network device HPA.
638 *
639 * Get the LAN station address when it is not directly available from the LAN hardware.
640 */
641int pdc_lan_station_id(char *lan_addr, unsigned long hpa)
642{
643 int retval;
644 unsigned long flags;
645
646 spin_lock_irqsave(&pdc_lock, flags);
647 retval = mem_pdc_call(PDC_LAN_STATION_ID, PDC_LAN_STATION_ID_READ,
648 __pa(pdc_result), hpa);
649 if (retval < 0) {
650 /* FIXME: else read MAC from NVRAM */
651 memset(lan_addr, 0, PDC_LAN_STATION_ID_SIZE);
652 } else {
653 memcpy(lan_addr, pdc_result, PDC_LAN_STATION_ID_SIZE);
654 }
655 spin_unlock_irqrestore(&pdc_lock, flags);
656
657 return retval;
658}
659EXPORT_SYMBOL(pdc_lan_station_id);
660
661/**
662 * pdc_stable_read - Read data from Stable Storage.
663 * @staddr: Stable Storage address to access.
664 * @memaddr: The memory address where Stable Storage data shall be copied.
665 * @count: number of bytes to transfer. count is multiple of 4.
666 *
667 * This PDC call reads from the Stable Storage address supplied in staddr
668 * and copies count bytes to the memory address memaddr.
669 * The call will fail if staddr+count > PDC_STABLE size.
670 */
671int pdc_stable_read(unsigned long staddr, void *memaddr, unsigned long count)
672{
673 int retval;
674 unsigned long flags;
675
676 spin_lock_irqsave(&pdc_lock, flags);
677 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_READ, staddr,
678 __pa(pdc_result), count);
679 convert_to_wide(pdc_result);
680 memcpy(memaddr, pdc_result, count);
681 spin_unlock_irqrestore(&pdc_lock, flags);
682
683 return retval;
684}
685EXPORT_SYMBOL(pdc_stable_read);
686
687/**
688 * pdc_stable_write - Write data to Stable Storage.
689 * @staddr: Stable Storage address to access.
690 * @memaddr: The memory address where Stable Storage data shall be read from.
691 * @count: number of bytes to transfer. count is multiple of 4.
692 *
693 * This PDC call reads count bytes from the supplied memaddr address,
694 * and copies count bytes to the Stable Storage address staddr.
695 * The call will fail if staddr+count > PDC_STABLE size.
696 */
697int pdc_stable_write(unsigned long staddr, void *memaddr, unsigned long count)
698{
699 int retval;
700 unsigned long flags;
701
702 spin_lock_irqsave(&pdc_lock, flags);
703 memcpy(pdc_result, memaddr, count);
704 convert_to_wide(pdc_result);
705 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_WRITE, staddr,
706 __pa(pdc_result), count);
707 spin_unlock_irqrestore(&pdc_lock, flags);
708
709 return retval;
710}
711EXPORT_SYMBOL(pdc_stable_write);
712
713/**
714 * pdc_stable_get_size - Get Stable Storage size in bytes.
715 * @size: pointer where the size will be stored.
716 *
717 * This PDC call returns the number of bytes in the processor's Stable
718 * Storage, which is the number of contiguous bytes implemented in Stable
719 * Storage starting from staddr=0. size in an unsigned 64-bit integer
720 * which is a multiple of four.
721 */
722int pdc_stable_get_size(unsigned long *size)
723{
724 int retval;
725 unsigned long flags;
726
727 spin_lock_irqsave(&pdc_lock, flags);
728 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_RETURN_SIZE, __pa(pdc_result));
729 *size = pdc_result[0];
730 spin_unlock_irqrestore(&pdc_lock, flags);
731
732 return retval;
733}
734EXPORT_SYMBOL(pdc_stable_get_size);
735
736/**
737 * pdc_stable_verify_contents - Checks that Stable Storage contents are valid.
738 *
739 * This PDC call is meant to be used to check the integrity of the current
740 * contents of Stable Storage.
741 */
742int pdc_stable_verify_contents(void)
743{
744 int retval;
745 unsigned long flags;
746
747 spin_lock_irqsave(&pdc_lock, flags);
748 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_VERIFY_CONTENTS);
749 spin_unlock_irqrestore(&pdc_lock, flags);
750
751 return retval;
752}
753EXPORT_SYMBOL(pdc_stable_verify_contents);
754
755/**
756 * pdc_stable_initialize - Sets Stable Storage contents to zero and initialize
757 * the validity indicator.
758 *
759 * This PDC call will erase all contents of Stable Storage. Use with care!
760 */
761int pdc_stable_initialize(void)
762{
763 int retval;
764 unsigned long flags;
765
766 spin_lock_irqsave(&pdc_lock, flags);
767 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_INITIALIZE);
768 spin_unlock_irqrestore(&pdc_lock, flags);
769
770 return retval;
771}
772EXPORT_SYMBOL(pdc_stable_initialize);
773
774/**
775 * pdc_get_initiator - Get the SCSI Interface Card params (SCSI ID, SDTR, SE or LVD)
776 * @hwpath: fully bc.mod style path to the device.
777 * @initiator: the array to return the result into
778 *
779 * Get the SCSI operational parameters from PDC.
780 * Needed since HPUX never used BIOS or symbios card NVRAM.
781 * Most ncr/sym cards won't have an entry and just use whatever
782 * capabilities of the card are (eg Ultra, LVD). But there are
783 * several cases where it's useful:
784 * o set SCSI id for Multi-initiator clusters,
785 * o cable too long (ie SE scsi 10Mhz won't support 6m length),
786 * o bus width exported is less than what the interface chip supports.
787 */
788int pdc_get_initiator(struct hardware_path *hwpath, struct pdc_initiator *initiator)
789{
790 int retval;
791 unsigned long flags;
792
793 spin_lock_irqsave(&pdc_lock, flags);
794
795/* BCJ-XXXX series boxes. E.G. "9000/785/C3000" */
796#define IS_SPROCKETS() (strlen(boot_cpu_data.pdc.sys_model_name) == 14 && \
797 strncmp(boot_cpu_data.pdc.sys_model_name, "9000/785", 8) == 0)
798
799 retval = mem_pdc_call(PDC_INITIATOR, PDC_GET_INITIATOR,
800 __pa(pdc_result), __pa(hwpath));
801 if (retval < PDC_OK)
802 goto out;
803
804 if (pdc_result[0] < 16) {
805 initiator->host_id = pdc_result[0];
806 } else {
807 initiator->host_id = -1;
808 }
809
810 /*
811 * Sprockets and Piranha return 20 or 40 (MT/s). Prelude returns
812 * 1, 2, 5 or 10 for 5, 10, 20 or 40 MT/s, respectively
813 */
814 switch (pdc_result[1]) {
815 case 1: initiator->factor = 50; break;
816 case 2: initiator->factor = 25; break;
817 case 5: initiator->factor = 12; break;
818 case 25: initiator->factor = 10; break;
819 case 20: initiator->factor = 12; break;
820 case 40: initiator->factor = 10; break;
821 default: initiator->factor = -1; break;
822 }
823
824 if (IS_SPROCKETS()) {
825 initiator->width = pdc_result[4];
826 initiator->mode = pdc_result[5];
827 } else {
828 initiator->width = -1;
829 initiator->mode = -1;
830 }
831
832 out:
833 spin_unlock_irqrestore(&pdc_lock, flags);
834
835 return (retval >= PDC_OK);
836}
837EXPORT_SYMBOL(pdc_get_initiator);
838
839
840/**
841 * pdc_pci_irt_size - Get the number of entries in the interrupt routing table.
842 * @num_entries: The return value.
843 * @hpa: The HPA for the device.
844 *
845 * This PDC function returns the number of entries in the specified cell's
846 * interrupt table.
847 * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes
848 */
849int pdc_pci_irt_size(unsigned long *num_entries, unsigned long hpa)
850{
851 int retval;
852 unsigned long flags;
853
854 spin_lock_irqsave(&pdc_lock, flags);
855 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL_SIZE,
856 __pa(pdc_result), hpa);
857 convert_to_wide(pdc_result);
858 *num_entries = pdc_result[0];
859 spin_unlock_irqrestore(&pdc_lock, flags);
860
861 return retval;
862}
863
864/**
865 * pdc_pci_irt - Get the PCI interrupt routing table.
866 * @num_entries: The number of entries in the table.
867 * @hpa: The Hard Physical Address of the device.
868 * @tbl:
869 *
870 * Get the PCI interrupt routing table for the device at the given HPA.
871 * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes
872 */
873int pdc_pci_irt(unsigned long num_entries, unsigned long hpa, void *tbl)
874{
875 int retval;
876 unsigned long flags;
877
878 BUG_ON((unsigned long)tbl & 0x7);
879
880 spin_lock_irqsave(&pdc_lock, flags);
881 pdc_result[0] = num_entries;
882 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL,
883 __pa(pdc_result), hpa, __pa(tbl));
884 spin_unlock_irqrestore(&pdc_lock, flags);
885
886 return retval;
887}
888
889
890#if 0 /* UNTEST CODE - left here in case someone needs it */
891
892/**
893 * pdc_pci_config_read - read PCI config space.
894 * @hpa token from PDC to indicate which PCI device
895 * @pci_addr configuration space address to read from
896 *
897 * Read PCI Configuration space *before* linux PCI subsystem is running.
898 */
899unsigned int pdc_pci_config_read(void *hpa, unsigned long cfg_addr)
900{
901 int retval;
902 unsigned long flags;
903
904 spin_lock_irqsave(&pdc_lock, flags);
905 pdc_result[0] = 0;
906 pdc_result[1] = 0;
907 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_READ_CONFIG,
908 __pa(pdc_result), hpa, cfg_addr&~3UL, 4UL);
909 spin_unlock_irqrestore(&pdc_lock, flags);
910
911 return retval ? ~0 : (unsigned int) pdc_result[0];
912}
913
914
915/**
916 * pdc_pci_config_write - read PCI config space.
917 * @hpa token from PDC to indicate which PCI device
918 * @pci_addr configuration space address to write
919 * @val value we want in the 32-bit register
920 *
921 * Write PCI Configuration space *before* linux PCI subsystem is running.
922 */
923void pdc_pci_config_write(void *hpa, unsigned long cfg_addr, unsigned int val)
924{
925 int retval;
926 unsigned long flags;
927
928 spin_lock_irqsave(&pdc_lock, flags);
929 pdc_result[0] = 0;
930 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_WRITE_CONFIG,
931 __pa(pdc_result), hpa,
932 cfg_addr&~3UL, 4UL, (unsigned long) val);
933 spin_unlock_irqrestore(&pdc_lock, flags);
934
935 return retval;
936}
937#endif /* UNTESTED CODE */
938
939/**
940 * pdc_tod_read - Read the Time-Of-Day clock.
941 * @tod: The return buffer:
942 *
943 * Read the Time-Of-Day clock
944 */
945int pdc_tod_read(struct pdc_tod *tod)
946{
947 int retval;
948 unsigned long flags;
949
950 spin_lock_irqsave(&pdc_lock, flags);
951 retval = mem_pdc_call(PDC_TOD, PDC_TOD_READ, __pa(pdc_result), 0);
952 convert_to_wide(pdc_result);
953 memcpy(tod, pdc_result, sizeof(*tod));
954 spin_unlock_irqrestore(&pdc_lock, flags);
955
956 return retval;
957}
958EXPORT_SYMBOL(pdc_tod_read);
959
960/**
961 * pdc_tod_set - Set the Time-Of-Day clock.
962 * @sec: The number of seconds since epoch.
963 * @usec: The number of micro seconds.
964 *
965 * Set the Time-Of-Day clock.
966 */
967int pdc_tod_set(unsigned long sec, unsigned long usec)
968{
969 int retval;
970 unsigned long flags;
971
972 spin_lock_irqsave(&pdc_lock, flags);
973 retval = mem_pdc_call(PDC_TOD, PDC_TOD_WRITE, sec, usec);
974 spin_unlock_irqrestore(&pdc_lock, flags);
975
976 return retval;
977}
978EXPORT_SYMBOL(pdc_tod_set);
979
980#ifdef CONFIG_64BIT
981int pdc_mem_mem_table(struct pdc_memory_table_raddr *r_addr,
982 struct pdc_memory_table *tbl, unsigned long entries)
983{
984 int retval;
985 unsigned long flags;
986
987 spin_lock_irqsave(&pdc_lock, flags);
988 retval = mem_pdc_call(PDC_MEM, PDC_MEM_TABLE, __pa(pdc_result), __pa(pdc_result2), entries);
989 convert_to_wide(pdc_result);
990 memcpy(r_addr, pdc_result, sizeof(*r_addr));
991 memcpy(tbl, pdc_result2, entries * sizeof(*tbl));
992 spin_unlock_irqrestore(&pdc_lock, flags);
993
994 return retval;
995}
996#endif /* CONFIG_64BIT */
997
998/* FIXME: Is this pdc used? I could not find type reference to ftc_bitmap
999 * so I guessed at unsigned long. Someone who knows what this does, can fix
1000 * it later. :)
1001 */
1002int pdc_do_firm_test_reset(unsigned long ftc_bitmap)
1003{
1004 int retval;
1005 unsigned long flags;
1006
1007 spin_lock_irqsave(&pdc_lock, flags);
1008 retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_FIRM_TEST_RESET,
1009 PDC_FIRM_TEST_MAGIC, ftc_bitmap);
1010 spin_unlock_irqrestore(&pdc_lock, flags);
1011
1012 return retval;
1013}
1014
1015/*
1016 * pdc_do_reset - Reset the system.
1017 *
1018 * Reset the system.
1019 */
1020int pdc_do_reset(void)
1021{
1022 int retval;
1023 unsigned long flags;
1024
1025 spin_lock_irqsave(&pdc_lock, flags);
1026 retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_RESET);
1027 spin_unlock_irqrestore(&pdc_lock, flags);
1028
1029 return retval;
1030}
1031
1032/*
1033 * pdc_soft_power_info - Enable soft power switch.
1034 * @power_reg: address of soft power register
1035 *
1036 * Return the absolute address of the soft power switch register
1037 */
1038int __init pdc_soft_power_info(unsigned long *power_reg)
1039{
1040 int retval;
1041 unsigned long flags;
1042
1043 *power_reg = (unsigned long) (-1);
1044
1045 spin_lock_irqsave(&pdc_lock, flags);
1046 retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_INFO, __pa(pdc_result), 0);
1047 if (retval == PDC_OK) {
1048 convert_to_wide(pdc_result);
1049 *power_reg = f_extend(pdc_result[0]);
1050 }
1051 spin_unlock_irqrestore(&pdc_lock, flags);
1052
1053 return retval;
1054}
1055
1056/*
1057 * pdc_soft_power_button - Control the soft power button behaviour
1058 * @sw_control: 0 for hardware control, 1 for software control
1059 *
1060 *
1061 * This PDC function places the soft power button under software or
1062 * hardware control.
1063 * Under software control the OS may control to when to allow to shut
1064 * down the system. Under hardware control pressing the power button
1065 * powers off the system immediately.
1066 */
1067int pdc_soft_power_button(int sw_control)
1068{
1069 int retval;
1070 unsigned long flags;
1071
1072 spin_lock_irqsave(&pdc_lock, flags);
1073 retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_ENABLE, __pa(pdc_result), sw_control);
1074 spin_unlock_irqrestore(&pdc_lock, flags);
1075
1076 return retval;
1077}
1078
1079/*
1080 * pdc_io_reset - Hack to avoid overlapping range registers of Bridges devices.
1081 * Primarily a problem on T600 (which parisc-linux doesn't support) but
1082 * who knows what other platform firmware might do with this OS "hook".
1083 */
1084void pdc_io_reset(void)
1085{
1086 unsigned long flags;
1087
1088 spin_lock_irqsave(&pdc_lock, flags);
1089 mem_pdc_call(PDC_IO, PDC_IO_RESET, 0);
1090 spin_unlock_irqrestore(&pdc_lock, flags);
1091}
1092
1093/*
1094 * pdc_io_reset_devices - Hack to Stop USB controller
1095 *
1096 * If PDC used the usb controller, the usb controller
1097 * is still running and will crash the machines during iommu
1098 * setup, because of still running DMA. This PDC call
1099 * stops the USB controller.
1100 * Normally called after calling pdc_io_reset().
1101 */
1102void pdc_io_reset_devices(void)
1103{
1104 unsigned long flags;
1105
1106 spin_lock_irqsave(&pdc_lock, flags);
1107 mem_pdc_call(PDC_IO, PDC_IO_RESET_DEVICES, 0);
1108 spin_unlock_irqrestore(&pdc_lock, flags);
1109}
1110
1111/* locked by pdc_console_lock */
1112static int __attribute__((aligned(8))) iodc_retbuf[32];
1113static char __attribute__((aligned(64))) iodc_dbuf[4096];
1114
1115/**
1116 * pdc_iodc_print - Console print using IODC.
1117 * @str: the string to output.
1118 * @count: length of str
1119 *
1120 * Note that only these special chars are architected for console IODC io:
1121 * BEL, BS, CR, and LF. Others are passed through.
1122 * Since the HP console requires CR+LF to perform a 'newline', we translate
1123 * "\n" to "\r\n".
1124 */
1125int pdc_iodc_print(const unsigned char *str, unsigned count)
1126{
1127 unsigned int i;
1128 unsigned long flags;
1129
1130 for (i = 0; i < count;) {
1131 switch(str[i]) {
1132 case '\n':
1133 iodc_dbuf[i+0] = '\r';
1134 iodc_dbuf[i+1] = '\n';
1135 i += 2;
1136 goto print;
1137 default:
1138 iodc_dbuf[i] = str[i];
1139 i++;
1140 break;
1141 }
1142 }
1143
1144print:
1145 spin_lock_irqsave(&pdc_lock, flags);
1146 real32_call(PAGE0->mem_cons.iodc_io,
1147 (unsigned long)PAGE0->mem_cons.hpa, ENTRY_IO_COUT,
1148 PAGE0->mem_cons.spa, __pa(PAGE0->mem_cons.dp.layers),
1149 __pa(iodc_retbuf), 0, __pa(iodc_dbuf), i, 0);
1150 spin_unlock_irqrestore(&pdc_lock, flags);
1151
1152 return i;
1153}
1154
1155/**
1156 * pdc_iodc_getc - Read a character (non-blocking) from the PDC console.
1157 *
1158 * Read a character (non-blocking) from the PDC console, returns -1 if
1159 * key is not present.
1160 */
1161int pdc_iodc_getc(void)
1162{
1163 int ch;
1164 int status;
1165 unsigned long flags;
1166
1167 /* Bail if no console input device. */
1168 if (!PAGE0->mem_kbd.iodc_io)
1169 return 0;
1170
1171 /* wait for a keyboard (rs232)-input */
1172 spin_lock_irqsave(&pdc_lock, flags);
1173 real32_call(PAGE0->mem_kbd.iodc_io,
1174 (unsigned long)PAGE0->mem_kbd.hpa, ENTRY_IO_CIN,
1175 PAGE0->mem_kbd.spa, __pa(PAGE0->mem_kbd.dp.layers),
1176 __pa(iodc_retbuf), 0, __pa(iodc_dbuf), 1, 0);
1177
1178 ch = *iodc_dbuf;
1179 status = *iodc_retbuf;
1180 spin_unlock_irqrestore(&pdc_lock, flags);
1181
1182 if (status == 0)
1183 return -1;
1184
1185 return ch;
1186}
1187
1188int pdc_sti_call(unsigned long func, unsigned long flags,
1189 unsigned long inptr, unsigned long outputr,
1190 unsigned long glob_cfg)
1191{
1192 int retval;
1193 unsigned long irqflags;
1194
1195 spin_lock_irqsave(&pdc_lock, irqflags);
1196 retval = real32_call(func, flags, inptr, outputr, glob_cfg);
1197 spin_unlock_irqrestore(&pdc_lock, irqflags);
1198
1199 return retval;
1200}
1201EXPORT_SYMBOL(pdc_sti_call);
1202
1203#ifdef CONFIG_64BIT
1204/**
1205 * pdc_pat_cell_get_number - Returns the cell number.
1206 * @cell_info: The return buffer.
1207 *
1208 * This PDC call returns the cell number of the cell from which the call
1209 * is made.
1210 */
1211int pdc_pat_cell_get_number(struct pdc_pat_cell_num *cell_info)
1212{
1213 int retval;
1214 unsigned long flags;
1215
1216 spin_lock_irqsave(&pdc_lock, flags);
1217 retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_GET_NUMBER, __pa(pdc_result));
1218 memcpy(cell_info, pdc_result, sizeof(*cell_info));
1219 spin_unlock_irqrestore(&pdc_lock, flags);
1220
1221 return retval;
1222}
1223
1224/**
1225 * pdc_pat_cell_module - Retrieve the cell's module information.
1226 * @actcnt: The number of bytes written to mem_addr.
1227 * @ploc: The physical location.
1228 * @mod: The module index.
1229 * @view_type: The view of the address type.
1230 * @mem_addr: The return buffer.
1231 *
1232 * This PDC call returns information about each module attached to the cell
1233 * at the specified location.
1234 */
1235int pdc_pat_cell_module(unsigned long *actcnt, unsigned long ploc, unsigned long mod,
1236 unsigned long view_type, void *mem_addr)
1237{
1238 int retval;
1239 unsigned long flags;
1240 static struct pdc_pat_cell_mod_maddr_block result __attribute__ ((aligned (8)));
1241
1242 spin_lock_irqsave(&pdc_lock, flags);
1243 retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_MODULE, __pa(pdc_result),
1244 ploc, mod, view_type, __pa(&result));
1245 if(!retval) {
1246 *actcnt = pdc_result[0];
1247 memcpy(mem_addr, &result, *actcnt);
1248 }
1249 spin_unlock_irqrestore(&pdc_lock, flags);
1250
1251 return retval;
1252}
1253
1254/**
1255 * pdc_pat_cpu_get_number - Retrieve the cpu number.
1256 * @cpu_info: The return buffer.
1257 * @hpa: The Hard Physical Address of the CPU.
1258 *
1259 * Retrieve the cpu number for the cpu at the specified HPA.
1260 */
1261int pdc_pat_cpu_get_number(struct pdc_pat_cpu_num *cpu_info, void *hpa)
1262{
1263 int retval;
1264 unsigned long flags;
1265
1266 spin_lock_irqsave(&pdc_lock, flags);
1267 retval = mem_pdc_call(PDC_PAT_CPU, PDC_PAT_CPU_GET_NUMBER,
1268 __pa(&pdc_result), hpa);
1269 memcpy(cpu_info, pdc_result, sizeof(*cpu_info));
1270 spin_unlock_irqrestore(&pdc_lock, flags);
1271
1272 return retval;
1273}
1274
1275/**
1276 * pdc_pat_get_irt_size - Retrieve the number of entries in the cell's interrupt table.
1277 * @num_entries: The return value.
1278 * @cell_num: The target cell.
1279 *
1280 * This PDC function returns the number of entries in the specified cell's
1281 * interrupt table.
1282 */
1283int pdc_pat_get_irt_size(unsigned long *num_entries, unsigned long cell_num)
1284{
1285 int retval;
1286 unsigned long flags;
1287
1288 spin_lock_irqsave(&pdc_lock, flags);
1289 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE_SIZE,
1290 __pa(pdc_result), cell_num);
1291 *num_entries = pdc_result[0];
1292 spin_unlock_irqrestore(&pdc_lock, flags);
1293
1294 return retval;
1295}
1296
1297/**
1298 * pdc_pat_get_irt - Retrieve the cell's interrupt table.
1299 * @r_addr: The return buffer.
1300 * @cell_num: The target cell.
1301 *
1302 * This PDC function returns the actual interrupt table for the specified cell.
1303 */
1304int pdc_pat_get_irt(void *r_addr, unsigned long cell_num)
1305{
1306 int retval;
1307 unsigned long flags;
1308
1309 spin_lock_irqsave(&pdc_lock, flags);
1310 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE,
1311 __pa(r_addr), cell_num);
1312 spin_unlock_irqrestore(&pdc_lock, flags);
1313
1314 return retval;
1315}
1316
1317/**
1318 * pdc_pat_pd_get_addr_map - Retrieve information about memory address ranges.
1319 * @actlen: The return buffer.
1320 * @mem_addr: Pointer to the memory buffer.
1321 * @count: The number of bytes to read from the buffer.
1322 * @offset: The offset with respect to the beginning of the buffer.
1323 *
1324 */
1325int pdc_pat_pd_get_addr_map(unsigned long *actual_len, void *mem_addr,
1326 unsigned long count, unsigned long offset)
1327{
1328 int retval;
1329 unsigned long flags;
1330
1331 spin_lock_irqsave(&pdc_lock, flags);
1332 retval = mem_pdc_call(PDC_PAT_PD, PDC_PAT_PD_GET_ADDR_MAP, __pa(pdc_result),
1333 __pa(pdc_result2), count, offset);
1334 *actual_len = pdc_result[0];
1335 memcpy(mem_addr, pdc_result2, *actual_len);
1336 spin_unlock_irqrestore(&pdc_lock, flags);
1337
1338 return retval;
1339}
1340
1341/**
1342 * pdc_pat_io_pci_cfg_read - Read PCI configuration space.
1343 * @pci_addr: PCI configuration space address for which the read request is being made.
1344 * @pci_size: Size of read in bytes. Valid values are 1, 2, and 4.
1345 * @mem_addr: Pointer to return memory buffer.
1346 *
1347 */
1348int pdc_pat_io_pci_cfg_read(unsigned long pci_addr, int pci_size, u32 *mem_addr)
1349{
1350 int retval;
1351 unsigned long flags;
1352
1353 spin_lock_irqsave(&pdc_lock, flags);
1354 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_READ,
1355 __pa(pdc_result), pci_addr, pci_size);
1356 switch(pci_size) {
1357 case 1: *(u8 *) mem_addr = (u8) pdc_result[0];
1358 case 2: *(u16 *)mem_addr = (u16) pdc_result[0];
1359 case 4: *(u32 *)mem_addr = (u32) pdc_result[0];
1360 }
1361 spin_unlock_irqrestore(&pdc_lock, flags);
1362
1363 return retval;
1364}
1365
1366/**
1367 * pdc_pat_io_pci_cfg_write - Retrieve information about memory address ranges.
1368 * @pci_addr: PCI configuration space address for which the write request is being made.
1369 * @pci_size: Size of write in bytes. Valid values are 1, 2, and 4.
1370 * @value: Pointer to 1, 2, or 4 byte value in low order end of argument to be
1371 * written to PCI Config space.
1372 *
1373 */
1374int pdc_pat_io_pci_cfg_write(unsigned long pci_addr, int pci_size, u32 val)
1375{
1376 int retval;
1377 unsigned long flags;
1378
1379 spin_lock_irqsave(&pdc_lock, flags);
1380 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_WRITE,
1381 pci_addr, pci_size, val);
1382 spin_unlock_irqrestore(&pdc_lock, flags);
1383
1384 return retval;
1385}
1386#endif /* CONFIG_64BIT */
1387
1388
1389/***************** 32-bit real-mode calls ***********/
1390/* The struct below is used
1391 * to overlay real_stack (real2.S), preparing a 32-bit call frame.
1392 * real32_call_asm() then uses this stack in narrow real mode
1393 */
1394
1395struct narrow_stack {
1396 /* use int, not long which is 64 bits */
1397 unsigned int arg13;
1398 unsigned int arg12;
1399 unsigned int arg11;
1400 unsigned int arg10;
1401 unsigned int arg9;
1402 unsigned int arg8;
1403 unsigned int arg7;
1404 unsigned int arg6;
1405 unsigned int arg5;
1406 unsigned int arg4;
1407 unsigned int arg3;
1408 unsigned int arg2;
1409 unsigned int arg1;
1410 unsigned int arg0;
1411 unsigned int frame_marker[8];
1412 unsigned int sp;
1413 /* in reality, there's nearly 8k of stack after this */
1414};
1415
1416long real32_call(unsigned long fn, ...)
1417{
1418 va_list args;
1419 extern struct narrow_stack real_stack;
1420 extern unsigned long real32_call_asm(unsigned int *,
1421 unsigned int *,
1422 unsigned int);
1423
1424 va_start(args, fn);
1425 real_stack.arg0 = va_arg(args, unsigned int);
1426 real_stack.arg1 = va_arg(args, unsigned int);
1427 real_stack.arg2 = va_arg(args, unsigned int);
1428 real_stack.arg3 = va_arg(args, unsigned int);
1429 real_stack.arg4 = va_arg(args, unsigned int);
1430 real_stack.arg5 = va_arg(args, unsigned int);
1431 real_stack.arg6 = va_arg(args, unsigned int);
1432 real_stack.arg7 = va_arg(args, unsigned int);
1433 real_stack.arg8 = va_arg(args, unsigned int);
1434 real_stack.arg9 = va_arg(args, unsigned int);
1435 real_stack.arg10 = va_arg(args, unsigned int);
1436 real_stack.arg11 = va_arg(args, unsigned int);
1437 real_stack.arg12 = va_arg(args, unsigned int);
1438 real_stack.arg13 = va_arg(args, unsigned int);
1439 va_end(args);
1440
1441 return real32_call_asm(&real_stack.sp, &real_stack.arg0, fn);
1442}
1443
1444#ifdef CONFIG_64BIT
1445/***************** 64-bit real-mode calls ***********/
1446
1447struct wide_stack {
1448 unsigned long arg0;
1449 unsigned long arg1;
1450 unsigned long arg2;
1451 unsigned long arg3;
1452 unsigned long arg4;
1453 unsigned long arg5;
1454 unsigned long arg6;
1455 unsigned long arg7;
1456 unsigned long arg8;
1457 unsigned long arg9;
1458 unsigned long arg10;
1459 unsigned long arg11;
1460 unsigned long arg12;
1461 unsigned long arg13;
1462 unsigned long frame_marker[2]; /* rp, previous sp */
1463 unsigned long sp;
1464 /* in reality, there's nearly 8k of stack after this */
1465};
1466
1467long real64_call(unsigned long fn, ...)
1468{
1469 va_list args;
1470 extern struct wide_stack real64_stack;
1471 extern unsigned long real64_call_asm(unsigned long *,
1472 unsigned long *,
1473 unsigned long);
1474
1475 va_start(args, fn);
1476 real64_stack.arg0 = va_arg(args, unsigned long);
1477 real64_stack.arg1 = va_arg(args, unsigned long);
1478 real64_stack.arg2 = va_arg(args, unsigned long);
1479 real64_stack.arg3 = va_arg(args, unsigned long);
1480 real64_stack.arg4 = va_arg(args, unsigned long);
1481 real64_stack.arg5 = va_arg(args, unsigned long);
1482 real64_stack.arg6 = va_arg(args, unsigned long);
1483 real64_stack.arg7 = va_arg(args, unsigned long);
1484 real64_stack.arg8 = va_arg(args, unsigned long);
1485 real64_stack.arg9 = va_arg(args, unsigned long);
1486 real64_stack.arg10 = va_arg(args, unsigned long);
1487 real64_stack.arg11 = va_arg(args, unsigned long);
1488 real64_stack.arg12 = va_arg(args, unsigned long);
1489 real64_stack.arg13 = va_arg(args, unsigned long);
1490 va_end(args);
1491
1492 return real64_call_asm(&real64_stack.sp, &real64_stack.arg0, fn);
1493}
1494
1495#endif /* CONFIG_64BIT */
1496
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * arch/parisc/kernel/firmware.c - safe PDC access routines
4 *
5 * PDC == Processor Dependent Code
6 *
7 * See PDC documentation at
8 * https://parisc.wiki.kernel.org/index.php/Technical_Documentation
9 * for documentation describing the entry points and calling
10 * conventions defined below.
11 *
12 * Copyright 1999 SuSE GmbH Nuernberg (Philipp Rumpf, prumpf@tux.org)
13 * Copyright 1999 The Puffin Group, (Alex deVries, David Kennedy)
14 * Copyright 2003 Grant Grundler <grundler parisc-linux org>
15 * Copyright 2003,2004 Ryan Bradetich <rbrad@parisc-linux.org>
16 * Copyright 2004,2006 Thibaut VARENE <varenet@parisc-linux.org>
17 */
18
19/* I think it would be in everyone's best interest to follow this
20 * guidelines when writing PDC wrappers:
21 *
22 * - the name of the pdc wrapper should match one of the macros
23 * used for the first two arguments
24 * - don't use caps for random parts of the name
25 * - use the static PDC result buffers and "copyout" to structs
26 * supplied by the caller to encapsulate alignment restrictions
27 * - hold pdc_lock while in PDC or using static result buffers
28 * - use __pa() to convert virtual (kernel) pointers to physical
29 * ones.
30 * - the name of the struct used for pdc return values should equal
31 * one of the macros used for the first two arguments to the
32 * corresponding PDC call
33 * - keep the order of arguments
34 * - don't be smart (setting trailing NUL bytes for strings, return
35 * something useful even if the call failed) unless you are sure
36 * it's not going to affect functionality or performance
37 *
38 * Example:
39 * int pdc_cache_info(struct pdc_cache_info *cache_info )
40 * {
41 * int retval;
42 *
43 * spin_lock_irq(&pdc_lock);
44 * retval = mem_pdc_call(PDC_CACHE,PDC_CACHE_INFO,__pa(cache_info),0);
45 * convert_to_wide(pdc_result);
46 * memcpy(cache_info, pdc_result, sizeof(*cache_info));
47 * spin_unlock_irq(&pdc_lock);
48 *
49 * return retval;
50 * }
51 * prumpf 991016
52 */
53
54#include <stdarg.h>
55
56#include <linux/delay.h>
57#include <linux/init.h>
58#include <linux/kernel.h>
59#include <linux/module.h>
60#include <linux/string.h>
61#include <linux/spinlock.h>
62
63#include <asm/page.h>
64#include <asm/pdc.h>
65#include <asm/pdcpat.h>
66#include <asm/processor.h> /* for boot_cpu_data */
67
68#if defined(BOOTLOADER)
69# undef spin_lock_irqsave
70# define spin_lock_irqsave(a, b) { b = 1; }
71# undef spin_unlock_irqrestore
72# define spin_unlock_irqrestore(a, b)
73#else
74static DEFINE_SPINLOCK(pdc_lock);
75#endif
76
77extern unsigned long pdc_result[NUM_PDC_RESULT];
78extern unsigned long pdc_result2[NUM_PDC_RESULT];
79
80#ifdef CONFIG_64BIT
81#define WIDE_FIRMWARE 0x1
82#define NARROW_FIRMWARE 0x2
83
84/* Firmware needs to be initially set to narrow to determine the
85 * actual firmware width. */
86int parisc_narrow_firmware __ro_after_init = 1;
87#endif
88
89/* On most currently-supported platforms, IODC I/O calls are 32-bit calls
90 * and MEM_PDC calls are always the same width as the OS.
91 * Some PAT boxes may have 64-bit IODC I/O.
92 *
93 * Ryan Bradetich added the now obsolete CONFIG_PDC_NARROW to allow
94 * 64-bit kernels to run on systems with 32-bit MEM_PDC calls.
95 * This allowed wide kernels to run on Cxxx boxes.
96 * We now detect 32-bit-only PDC and dynamically switch to 32-bit mode
97 * when running a 64-bit kernel on such boxes (e.g. C200 or C360).
98 */
99
100#ifdef CONFIG_64BIT
101long real64_call(unsigned long function, ...);
102#endif
103long real32_call(unsigned long function, ...);
104
105#ifdef CONFIG_64BIT
106# define MEM_PDC (unsigned long)(PAGE0->mem_pdc_hi) << 32 | PAGE0->mem_pdc
107# define mem_pdc_call(args...) unlikely(parisc_narrow_firmware) ? real32_call(MEM_PDC, args) : real64_call(MEM_PDC, args)
108#else
109# define MEM_PDC (unsigned long)PAGE0->mem_pdc
110# define mem_pdc_call(args...) real32_call(MEM_PDC, args)
111#endif
112
113
114/**
115 * f_extend - Convert PDC addresses to kernel addresses.
116 * @address: Address returned from PDC.
117 *
118 * This function is used to convert PDC addresses into kernel addresses
119 * when the PDC address size and kernel address size are different.
120 */
121static unsigned long f_extend(unsigned long address)
122{
123#ifdef CONFIG_64BIT
124 if(unlikely(parisc_narrow_firmware)) {
125 if((address & 0xff000000) == 0xf0000000)
126 return 0xf0f0f0f000000000UL | (u32)address;
127
128 if((address & 0xf0000000) == 0xf0000000)
129 return 0xffffffff00000000UL | (u32)address;
130 }
131#endif
132 return address;
133}
134
135/**
136 * convert_to_wide - Convert the return buffer addresses into kernel addresses.
137 * @address: The return buffer from PDC.
138 *
139 * This function is used to convert the return buffer addresses retrieved from PDC
140 * into kernel addresses when the PDC address size and kernel address size are
141 * different.
142 */
143static void convert_to_wide(unsigned long *addr)
144{
145#ifdef CONFIG_64BIT
146 int i;
147 unsigned int *p = (unsigned int *)addr;
148
149 if (unlikely(parisc_narrow_firmware)) {
150 for (i = (NUM_PDC_RESULT-1); i >= 0; --i)
151 addr[i] = p[i];
152 }
153#endif
154}
155
156#ifdef CONFIG_64BIT
157void set_firmware_width_unlocked(void)
158{
159 int ret;
160
161 ret = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES,
162 __pa(pdc_result), 0);
163 convert_to_wide(pdc_result);
164 if (pdc_result[0] != NARROW_FIRMWARE)
165 parisc_narrow_firmware = 0;
166}
167
168/**
169 * set_firmware_width - Determine if the firmware is wide or narrow.
170 *
171 * This function must be called before any pdc_* function that uses the
172 * convert_to_wide function.
173 */
174void set_firmware_width(void)
175{
176 unsigned long flags;
177 spin_lock_irqsave(&pdc_lock, flags);
178 set_firmware_width_unlocked();
179 spin_unlock_irqrestore(&pdc_lock, flags);
180}
181#else
182void set_firmware_width_unlocked(void)
183{
184 return;
185}
186
187void set_firmware_width(void)
188{
189 return;
190}
191#endif /*CONFIG_64BIT*/
192
193
194#if !defined(BOOTLOADER)
195/**
196 * pdc_emergency_unlock - Unlock the linux pdc lock
197 *
198 * This call unlocks the linux pdc lock in case we need some PDC functions
199 * (like pdc_add_valid) during kernel stack dump.
200 */
201void pdc_emergency_unlock(void)
202{
203 /* Spinlock DEBUG code freaks out if we unconditionally unlock */
204 if (spin_is_locked(&pdc_lock))
205 spin_unlock(&pdc_lock);
206}
207
208
209/**
210 * pdc_add_valid - Verify address can be accessed without causing a HPMC.
211 * @address: Address to be verified.
212 *
213 * This PDC call attempts to read from the specified address and verifies
214 * if the address is valid.
215 *
216 * The return value is PDC_OK (0) in case accessing this address is valid.
217 */
218int pdc_add_valid(unsigned long address)
219{
220 int retval;
221 unsigned long flags;
222
223 spin_lock_irqsave(&pdc_lock, flags);
224 retval = mem_pdc_call(PDC_ADD_VALID, PDC_ADD_VALID_VERIFY, address);
225 spin_unlock_irqrestore(&pdc_lock, flags);
226
227 return retval;
228}
229EXPORT_SYMBOL(pdc_add_valid);
230
231/**
232 * pdc_instr - Get instruction that invokes PDCE_CHECK in HPMC handler.
233 * @instr: Pointer to variable which will get instruction opcode.
234 *
235 * The return value is PDC_OK (0) in case call succeeded.
236 */
237int __init pdc_instr(unsigned int *instr)
238{
239 int retval;
240 unsigned long flags;
241
242 spin_lock_irqsave(&pdc_lock, flags);
243 retval = mem_pdc_call(PDC_INSTR, 0UL, __pa(pdc_result));
244 convert_to_wide(pdc_result);
245 *instr = pdc_result[0];
246 spin_unlock_irqrestore(&pdc_lock, flags);
247
248 return retval;
249}
250
251/**
252 * pdc_chassis_info - Return chassis information.
253 * @result: The return buffer.
254 * @chassis_info: The memory buffer address.
255 * @len: The size of the memory buffer address.
256 *
257 * An HVERSION dependent call for returning the chassis information.
258 */
259int __init pdc_chassis_info(struct pdc_chassis_info *chassis_info, void *led_info, unsigned long len)
260{
261 int retval;
262 unsigned long flags;
263
264 spin_lock_irqsave(&pdc_lock, flags);
265 memcpy(&pdc_result, chassis_info, sizeof(*chassis_info));
266 memcpy(&pdc_result2, led_info, len);
267 retval = mem_pdc_call(PDC_CHASSIS, PDC_RETURN_CHASSIS_INFO,
268 __pa(pdc_result), __pa(pdc_result2), len);
269 memcpy(chassis_info, pdc_result, sizeof(*chassis_info));
270 memcpy(led_info, pdc_result2, len);
271 spin_unlock_irqrestore(&pdc_lock, flags);
272
273 return retval;
274}
275
276/**
277 * pdc_pat_chassis_send_log - Sends a PDC PAT CHASSIS log message.
278 * @retval: -1 on error, 0 on success. Other value are PDC errors
279 *
280 * Must be correctly formatted or expect system crash
281 */
282#ifdef CONFIG_64BIT
283int pdc_pat_chassis_send_log(unsigned long state, unsigned long data)
284{
285 int retval = 0;
286 unsigned long flags;
287
288 if (!is_pdc_pat())
289 return -1;
290
291 spin_lock_irqsave(&pdc_lock, flags);
292 retval = mem_pdc_call(PDC_PAT_CHASSIS_LOG, PDC_PAT_CHASSIS_WRITE_LOG, __pa(&state), __pa(&data));
293 spin_unlock_irqrestore(&pdc_lock, flags);
294
295 return retval;
296}
297#endif
298
299/**
300 * pdc_chassis_disp - Updates chassis code
301 * @retval: -1 on error, 0 on success
302 */
303int pdc_chassis_disp(unsigned long disp)
304{
305 int retval = 0;
306 unsigned long flags;
307
308 spin_lock_irqsave(&pdc_lock, flags);
309 retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_DISP, disp);
310 spin_unlock_irqrestore(&pdc_lock, flags);
311
312 return retval;
313}
314
315/**
316 * pdc_cpu_rendenzvous - Stop currently executing CPU
317 * @retval: -1 on error, 0 on success
318 */
319int __pdc_cpu_rendezvous(void)
320{
321 if (is_pdc_pat())
322 return mem_pdc_call(PDC_PAT_CPU, PDC_PAT_CPU_RENDEZVOUS);
323 else
324 return mem_pdc_call(PDC_PROC, 1, 0);
325}
326
327
328/**
329 * pdc_chassis_warn - Fetches chassis warnings
330 * @retval: -1 on error, 0 on success
331 */
332int pdc_chassis_warn(unsigned long *warn)
333{
334 int retval = 0;
335 unsigned long flags;
336
337 spin_lock_irqsave(&pdc_lock, flags);
338 retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_WARN, __pa(pdc_result));
339 *warn = pdc_result[0];
340 spin_unlock_irqrestore(&pdc_lock, flags);
341
342 return retval;
343}
344
345int pdc_coproc_cfg_unlocked(struct pdc_coproc_cfg *pdc_coproc_info)
346{
347 int ret;
348
349 ret = mem_pdc_call(PDC_COPROC, PDC_COPROC_CFG, __pa(pdc_result));
350 convert_to_wide(pdc_result);
351 pdc_coproc_info->ccr_functional = pdc_result[0];
352 pdc_coproc_info->ccr_present = pdc_result[1];
353 pdc_coproc_info->revision = pdc_result[17];
354 pdc_coproc_info->model = pdc_result[18];
355
356 return ret;
357}
358
359/**
360 * pdc_coproc_cfg - To identify coprocessors attached to the processor.
361 * @pdc_coproc_info: Return buffer address.
362 *
363 * This PDC call returns the presence and status of all the coprocessors
364 * attached to the processor.
365 */
366int pdc_coproc_cfg(struct pdc_coproc_cfg *pdc_coproc_info)
367{
368 int ret;
369 unsigned long flags;
370
371 spin_lock_irqsave(&pdc_lock, flags);
372 ret = pdc_coproc_cfg_unlocked(pdc_coproc_info);
373 spin_unlock_irqrestore(&pdc_lock, flags);
374
375 return ret;
376}
377
378/**
379 * pdc_iodc_read - Read data from the modules IODC.
380 * @actcnt: The actual number of bytes.
381 * @hpa: The HPA of the module for the iodc read.
382 * @index: The iodc entry point.
383 * @iodc_data: A buffer memory for the iodc options.
384 * @iodc_data_size: Size of the memory buffer.
385 *
386 * This PDC call reads from the IODC of the module specified by the hpa
387 * argument.
388 */
389int pdc_iodc_read(unsigned long *actcnt, unsigned long hpa, unsigned int index,
390 void *iodc_data, unsigned int iodc_data_size)
391{
392 int retval;
393 unsigned long flags;
394
395 spin_lock_irqsave(&pdc_lock, flags);
396 retval = mem_pdc_call(PDC_IODC, PDC_IODC_READ, __pa(pdc_result), hpa,
397 index, __pa(pdc_result2), iodc_data_size);
398 convert_to_wide(pdc_result);
399 *actcnt = pdc_result[0];
400 memcpy(iodc_data, pdc_result2, iodc_data_size);
401 spin_unlock_irqrestore(&pdc_lock, flags);
402
403 return retval;
404}
405EXPORT_SYMBOL(pdc_iodc_read);
406
407/**
408 * pdc_system_map_find_mods - Locate unarchitected modules.
409 * @pdc_mod_info: Return buffer address.
410 * @mod_path: pointer to dev path structure.
411 * @mod_index: fixed address module index.
412 *
413 * To locate and identify modules which reside at fixed I/O addresses, which
414 * do not self-identify via architected bus walks.
415 */
416int pdc_system_map_find_mods(struct pdc_system_map_mod_info *pdc_mod_info,
417 struct pdc_module_path *mod_path, long mod_index)
418{
419 int retval;
420 unsigned long flags;
421
422 spin_lock_irqsave(&pdc_lock, flags);
423 retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_MODULE, __pa(pdc_result),
424 __pa(pdc_result2), mod_index);
425 convert_to_wide(pdc_result);
426 memcpy(pdc_mod_info, pdc_result, sizeof(*pdc_mod_info));
427 memcpy(mod_path, pdc_result2, sizeof(*mod_path));
428 spin_unlock_irqrestore(&pdc_lock, flags);
429
430 pdc_mod_info->mod_addr = f_extend(pdc_mod_info->mod_addr);
431 return retval;
432}
433
434/**
435 * pdc_system_map_find_addrs - Retrieve additional address ranges.
436 * @pdc_addr_info: Return buffer address.
437 * @mod_index: Fixed address module index.
438 * @addr_index: Address range index.
439 *
440 * Retrieve additional information about subsequent address ranges for modules
441 * with multiple address ranges.
442 */
443int pdc_system_map_find_addrs(struct pdc_system_map_addr_info *pdc_addr_info,
444 long mod_index, long addr_index)
445{
446 int retval;
447 unsigned long flags;
448
449 spin_lock_irqsave(&pdc_lock, flags);
450 retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_ADDRESS, __pa(pdc_result),
451 mod_index, addr_index);
452 convert_to_wide(pdc_result);
453 memcpy(pdc_addr_info, pdc_result, sizeof(*pdc_addr_info));
454 spin_unlock_irqrestore(&pdc_lock, flags);
455
456 pdc_addr_info->mod_addr = f_extend(pdc_addr_info->mod_addr);
457 return retval;
458}
459
460/**
461 * pdc_model_info - Return model information about the processor.
462 * @model: The return buffer.
463 *
464 * Returns the version numbers, identifiers, and capabilities from the processor module.
465 */
466int pdc_model_info(struct pdc_model *model)
467{
468 int retval;
469 unsigned long flags;
470
471 spin_lock_irqsave(&pdc_lock, flags);
472 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_INFO, __pa(pdc_result), 0);
473 convert_to_wide(pdc_result);
474 memcpy(model, pdc_result, sizeof(*model));
475 spin_unlock_irqrestore(&pdc_lock, flags);
476
477 return retval;
478}
479
480/**
481 * pdc_model_sysmodel - Get the system model name.
482 * @name: A char array of at least 81 characters.
483 *
484 * Get system model name from PDC ROM (e.g. 9000/715 or 9000/778/B160L).
485 * Using OS_ID_HPUX will return the equivalent of the 'modelname' command
486 * on HP/UX.
487 */
488int pdc_model_sysmodel(char *name)
489{
490 int retval;
491 unsigned long flags;
492
493 spin_lock_irqsave(&pdc_lock, flags);
494 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_SYSMODEL, __pa(pdc_result),
495 OS_ID_HPUX, __pa(name));
496 convert_to_wide(pdc_result);
497
498 if (retval == PDC_OK) {
499 name[pdc_result[0]] = '\0'; /* add trailing '\0' */
500 } else {
501 name[0] = 0;
502 }
503 spin_unlock_irqrestore(&pdc_lock, flags);
504
505 return retval;
506}
507
508/**
509 * pdc_model_versions - Identify the version number of each processor.
510 * @cpu_id: The return buffer.
511 * @id: The id of the processor to check.
512 *
513 * Returns the version number for each processor component.
514 *
515 * This comment was here before, but I do not know what it means :( -RB
516 * id: 0 = cpu revision, 1 = boot-rom-version
517 */
518int pdc_model_versions(unsigned long *versions, int id)
519{
520 int retval;
521 unsigned long flags;
522
523 spin_lock_irqsave(&pdc_lock, flags);
524 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_VERSIONS, __pa(pdc_result), id);
525 convert_to_wide(pdc_result);
526 *versions = pdc_result[0];
527 spin_unlock_irqrestore(&pdc_lock, flags);
528
529 return retval;
530}
531
532/**
533 * pdc_model_cpuid - Returns the CPU_ID.
534 * @cpu_id: The return buffer.
535 *
536 * Returns the CPU_ID value which uniquely identifies the cpu portion of
537 * the processor module.
538 */
539int pdc_model_cpuid(unsigned long *cpu_id)
540{
541 int retval;
542 unsigned long flags;
543
544 spin_lock_irqsave(&pdc_lock, flags);
545 pdc_result[0] = 0; /* preset zero (call may not be implemented!) */
546 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CPU_ID, __pa(pdc_result), 0);
547 convert_to_wide(pdc_result);
548 *cpu_id = pdc_result[0];
549 spin_unlock_irqrestore(&pdc_lock, flags);
550
551 return retval;
552}
553
554/**
555 * pdc_model_capabilities - Returns the platform capabilities.
556 * @capabilities: The return buffer.
557 *
558 * Returns information about platform support for 32- and/or 64-bit
559 * OSes, IO-PDIR coherency, and virtual aliasing.
560 */
561int pdc_model_capabilities(unsigned long *capabilities)
562{
563 int retval;
564 unsigned long flags;
565
566 spin_lock_irqsave(&pdc_lock, flags);
567 pdc_result[0] = 0; /* preset zero (call may not be implemented!) */
568 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES, __pa(pdc_result), 0);
569 convert_to_wide(pdc_result);
570 if (retval == PDC_OK) {
571 *capabilities = pdc_result[0];
572 } else {
573 *capabilities = PDC_MODEL_OS32;
574 }
575 spin_unlock_irqrestore(&pdc_lock, flags);
576
577 return retval;
578}
579
580/**
581 * pdc_model_platform_info - Returns machine product and serial number.
582 * @orig_prod_num: Return buffer for original product number.
583 * @current_prod_num: Return buffer for current product number.
584 * @serial_no: Return buffer for serial number.
585 *
586 * Returns strings containing the original and current product numbers and the
587 * serial number of the system.
588 */
589int pdc_model_platform_info(char *orig_prod_num, char *current_prod_num,
590 char *serial_no)
591{
592 int retval;
593 unsigned long flags;
594
595 spin_lock_irqsave(&pdc_lock, flags);
596 retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_GET_PLATFORM_INFO,
597 __pa(orig_prod_num), __pa(current_prod_num), __pa(serial_no));
598 convert_to_wide(pdc_result);
599 spin_unlock_irqrestore(&pdc_lock, flags);
600
601 return retval;
602}
603
604/**
605 * pdc_cache_info - Return cache and TLB information.
606 * @cache_info: The return buffer.
607 *
608 * Returns information about the processor's cache and TLB.
609 */
610int pdc_cache_info(struct pdc_cache_info *cache_info)
611{
612 int retval;
613 unsigned long flags;
614
615 spin_lock_irqsave(&pdc_lock, flags);
616 retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_INFO, __pa(pdc_result), 0);
617 convert_to_wide(pdc_result);
618 memcpy(cache_info, pdc_result, sizeof(*cache_info));
619 spin_unlock_irqrestore(&pdc_lock, flags);
620
621 return retval;
622}
623
624/**
625 * pdc_spaceid_bits - Return whether Space ID hashing is turned on.
626 * @space_bits: Should be 0, if not, bad mojo!
627 *
628 * Returns information about Space ID hashing.
629 */
630int pdc_spaceid_bits(unsigned long *space_bits)
631{
632 int retval;
633 unsigned long flags;
634
635 spin_lock_irqsave(&pdc_lock, flags);
636 pdc_result[0] = 0;
637 retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_RET_SPID, __pa(pdc_result), 0);
638 convert_to_wide(pdc_result);
639 *space_bits = pdc_result[0];
640 spin_unlock_irqrestore(&pdc_lock, flags);
641
642 return retval;
643}
644
645#ifndef CONFIG_PA20
646/**
647 * pdc_btlb_info - Return block TLB information.
648 * @btlb: The return buffer.
649 *
650 * Returns information about the hardware Block TLB.
651 */
652int pdc_btlb_info(struct pdc_btlb_info *btlb)
653{
654 int retval;
655 unsigned long flags;
656
657 spin_lock_irqsave(&pdc_lock, flags);
658 retval = mem_pdc_call(PDC_BLOCK_TLB, PDC_BTLB_INFO, __pa(pdc_result), 0);
659 memcpy(btlb, pdc_result, sizeof(*btlb));
660 spin_unlock_irqrestore(&pdc_lock, flags);
661
662 if(retval < 0) {
663 btlb->max_size = 0;
664 }
665 return retval;
666}
667
668/**
669 * pdc_mem_map_hpa - Find fixed module information.
670 * @address: The return buffer
671 * @mod_path: pointer to dev path structure.
672 *
673 * This call was developed for S700 workstations to allow the kernel to find
674 * the I/O devices (Core I/O). In the future (Kittyhawk and beyond) this
675 * call will be replaced (on workstations) by the architected PDC_SYSTEM_MAP
676 * call.
677 *
678 * This call is supported by all existing S700 workstations (up to Gecko).
679 */
680int pdc_mem_map_hpa(struct pdc_memory_map *address,
681 struct pdc_module_path *mod_path)
682{
683 int retval;
684 unsigned long flags;
685
686 spin_lock_irqsave(&pdc_lock, flags);
687 memcpy(pdc_result2, mod_path, sizeof(*mod_path));
688 retval = mem_pdc_call(PDC_MEM_MAP, PDC_MEM_MAP_HPA, __pa(pdc_result),
689 __pa(pdc_result2));
690 memcpy(address, pdc_result, sizeof(*address));
691 spin_unlock_irqrestore(&pdc_lock, flags);
692
693 return retval;
694}
695#endif /* !CONFIG_PA20 */
696
697/**
698 * pdc_lan_station_id - Get the LAN address.
699 * @lan_addr: The return buffer.
700 * @hpa: The network device HPA.
701 *
702 * Get the LAN station address when it is not directly available from the LAN hardware.
703 */
704int pdc_lan_station_id(char *lan_addr, unsigned long hpa)
705{
706 int retval;
707 unsigned long flags;
708
709 spin_lock_irqsave(&pdc_lock, flags);
710 retval = mem_pdc_call(PDC_LAN_STATION_ID, PDC_LAN_STATION_ID_READ,
711 __pa(pdc_result), hpa);
712 if (retval < 0) {
713 /* FIXME: else read MAC from NVRAM */
714 memset(lan_addr, 0, PDC_LAN_STATION_ID_SIZE);
715 } else {
716 memcpy(lan_addr, pdc_result, PDC_LAN_STATION_ID_SIZE);
717 }
718 spin_unlock_irqrestore(&pdc_lock, flags);
719
720 return retval;
721}
722EXPORT_SYMBOL(pdc_lan_station_id);
723
724/**
725 * pdc_stable_read - Read data from Stable Storage.
726 * @staddr: Stable Storage address to access.
727 * @memaddr: The memory address where Stable Storage data shall be copied.
728 * @count: number of bytes to transfer. count is multiple of 4.
729 *
730 * This PDC call reads from the Stable Storage address supplied in staddr
731 * and copies count bytes to the memory address memaddr.
732 * The call will fail if staddr+count > PDC_STABLE size.
733 */
734int pdc_stable_read(unsigned long staddr, void *memaddr, unsigned long count)
735{
736 int retval;
737 unsigned long flags;
738
739 spin_lock_irqsave(&pdc_lock, flags);
740 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_READ, staddr,
741 __pa(pdc_result), count);
742 convert_to_wide(pdc_result);
743 memcpy(memaddr, pdc_result, count);
744 spin_unlock_irqrestore(&pdc_lock, flags);
745
746 return retval;
747}
748EXPORT_SYMBOL(pdc_stable_read);
749
750/**
751 * pdc_stable_write - Write data to Stable Storage.
752 * @staddr: Stable Storage address to access.
753 * @memaddr: The memory address where Stable Storage data shall be read from.
754 * @count: number of bytes to transfer. count is multiple of 4.
755 *
756 * This PDC call reads count bytes from the supplied memaddr address,
757 * and copies count bytes to the Stable Storage address staddr.
758 * The call will fail if staddr+count > PDC_STABLE size.
759 */
760int pdc_stable_write(unsigned long staddr, void *memaddr, unsigned long count)
761{
762 int retval;
763 unsigned long flags;
764
765 spin_lock_irqsave(&pdc_lock, flags);
766 memcpy(pdc_result, memaddr, count);
767 convert_to_wide(pdc_result);
768 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_WRITE, staddr,
769 __pa(pdc_result), count);
770 spin_unlock_irqrestore(&pdc_lock, flags);
771
772 return retval;
773}
774EXPORT_SYMBOL(pdc_stable_write);
775
776/**
777 * pdc_stable_get_size - Get Stable Storage size in bytes.
778 * @size: pointer where the size will be stored.
779 *
780 * This PDC call returns the number of bytes in the processor's Stable
781 * Storage, which is the number of contiguous bytes implemented in Stable
782 * Storage starting from staddr=0. size in an unsigned 64-bit integer
783 * which is a multiple of four.
784 */
785int pdc_stable_get_size(unsigned long *size)
786{
787 int retval;
788 unsigned long flags;
789
790 spin_lock_irqsave(&pdc_lock, flags);
791 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_RETURN_SIZE, __pa(pdc_result));
792 *size = pdc_result[0];
793 spin_unlock_irqrestore(&pdc_lock, flags);
794
795 return retval;
796}
797EXPORT_SYMBOL(pdc_stable_get_size);
798
799/**
800 * pdc_stable_verify_contents - Checks that Stable Storage contents are valid.
801 *
802 * This PDC call is meant to be used to check the integrity of the current
803 * contents of Stable Storage.
804 */
805int pdc_stable_verify_contents(void)
806{
807 int retval;
808 unsigned long flags;
809
810 spin_lock_irqsave(&pdc_lock, flags);
811 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_VERIFY_CONTENTS);
812 spin_unlock_irqrestore(&pdc_lock, flags);
813
814 return retval;
815}
816EXPORT_SYMBOL(pdc_stable_verify_contents);
817
818/**
819 * pdc_stable_initialize - Sets Stable Storage contents to zero and initialize
820 * the validity indicator.
821 *
822 * This PDC call will erase all contents of Stable Storage. Use with care!
823 */
824int pdc_stable_initialize(void)
825{
826 int retval;
827 unsigned long flags;
828
829 spin_lock_irqsave(&pdc_lock, flags);
830 retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_INITIALIZE);
831 spin_unlock_irqrestore(&pdc_lock, flags);
832
833 return retval;
834}
835EXPORT_SYMBOL(pdc_stable_initialize);
836
837/**
838 * pdc_get_initiator - Get the SCSI Interface Card params (SCSI ID, SDTR, SE or LVD)
839 * @hwpath: fully bc.mod style path to the device.
840 * @initiator: the array to return the result into
841 *
842 * Get the SCSI operational parameters from PDC.
843 * Needed since HPUX never used BIOS or symbios card NVRAM.
844 * Most ncr/sym cards won't have an entry and just use whatever
845 * capabilities of the card are (eg Ultra, LVD). But there are
846 * several cases where it's useful:
847 * o set SCSI id for Multi-initiator clusters,
848 * o cable too long (ie SE scsi 10Mhz won't support 6m length),
849 * o bus width exported is less than what the interface chip supports.
850 */
851int pdc_get_initiator(struct hardware_path *hwpath, struct pdc_initiator *initiator)
852{
853 int retval;
854 unsigned long flags;
855
856 spin_lock_irqsave(&pdc_lock, flags);
857
858/* BCJ-XXXX series boxes. E.G. "9000/785/C3000" */
859#define IS_SPROCKETS() (strlen(boot_cpu_data.pdc.sys_model_name) == 14 && \
860 strncmp(boot_cpu_data.pdc.sys_model_name, "9000/785", 8) == 0)
861
862 retval = mem_pdc_call(PDC_INITIATOR, PDC_GET_INITIATOR,
863 __pa(pdc_result), __pa(hwpath));
864 if (retval < PDC_OK)
865 goto out;
866
867 if (pdc_result[0] < 16) {
868 initiator->host_id = pdc_result[0];
869 } else {
870 initiator->host_id = -1;
871 }
872
873 /*
874 * Sprockets and Piranha return 20 or 40 (MT/s). Prelude returns
875 * 1, 2, 5 or 10 for 5, 10, 20 or 40 MT/s, respectively
876 */
877 switch (pdc_result[1]) {
878 case 1: initiator->factor = 50; break;
879 case 2: initiator->factor = 25; break;
880 case 5: initiator->factor = 12; break;
881 case 25: initiator->factor = 10; break;
882 case 20: initiator->factor = 12; break;
883 case 40: initiator->factor = 10; break;
884 default: initiator->factor = -1; break;
885 }
886
887 if (IS_SPROCKETS()) {
888 initiator->width = pdc_result[4];
889 initiator->mode = pdc_result[5];
890 } else {
891 initiator->width = -1;
892 initiator->mode = -1;
893 }
894
895 out:
896 spin_unlock_irqrestore(&pdc_lock, flags);
897
898 return (retval >= PDC_OK);
899}
900EXPORT_SYMBOL(pdc_get_initiator);
901
902
903/**
904 * pdc_pci_irt_size - Get the number of entries in the interrupt routing table.
905 * @num_entries: The return value.
906 * @hpa: The HPA for the device.
907 *
908 * This PDC function returns the number of entries in the specified cell's
909 * interrupt table.
910 * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes
911 */
912int pdc_pci_irt_size(unsigned long *num_entries, unsigned long hpa)
913{
914 int retval;
915 unsigned long flags;
916
917 spin_lock_irqsave(&pdc_lock, flags);
918 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL_SIZE,
919 __pa(pdc_result), hpa);
920 convert_to_wide(pdc_result);
921 *num_entries = pdc_result[0];
922 spin_unlock_irqrestore(&pdc_lock, flags);
923
924 return retval;
925}
926
927/**
928 * pdc_pci_irt - Get the PCI interrupt routing table.
929 * @num_entries: The number of entries in the table.
930 * @hpa: The Hard Physical Address of the device.
931 * @tbl:
932 *
933 * Get the PCI interrupt routing table for the device at the given HPA.
934 * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes
935 */
936int pdc_pci_irt(unsigned long num_entries, unsigned long hpa, void *tbl)
937{
938 int retval;
939 unsigned long flags;
940
941 BUG_ON((unsigned long)tbl & 0x7);
942
943 spin_lock_irqsave(&pdc_lock, flags);
944 pdc_result[0] = num_entries;
945 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL,
946 __pa(pdc_result), hpa, __pa(tbl));
947 spin_unlock_irqrestore(&pdc_lock, flags);
948
949 return retval;
950}
951
952
953#if 0 /* UNTEST CODE - left here in case someone needs it */
954
955/**
956 * pdc_pci_config_read - read PCI config space.
957 * @hpa token from PDC to indicate which PCI device
958 * @pci_addr configuration space address to read from
959 *
960 * Read PCI Configuration space *before* linux PCI subsystem is running.
961 */
962unsigned int pdc_pci_config_read(void *hpa, unsigned long cfg_addr)
963{
964 int retval;
965 unsigned long flags;
966
967 spin_lock_irqsave(&pdc_lock, flags);
968 pdc_result[0] = 0;
969 pdc_result[1] = 0;
970 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_READ_CONFIG,
971 __pa(pdc_result), hpa, cfg_addr&~3UL, 4UL);
972 spin_unlock_irqrestore(&pdc_lock, flags);
973
974 return retval ? ~0 : (unsigned int) pdc_result[0];
975}
976
977
978/**
979 * pdc_pci_config_write - read PCI config space.
980 * @hpa token from PDC to indicate which PCI device
981 * @pci_addr configuration space address to write
982 * @val value we want in the 32-bit register
983 *
984 * Write PCI Configuration space *before* linux PCI subsystem is running.
985 */
986void pdc_pci_config_write(void *hpa, unsigned long cfg_addr, unsigned int val)
987{
988 int retval;
989 unsigned long flags;
990
991 spin_lock_irqsave(&pdc_lock, flags);
992 pdc_result[0] = 0;
993 retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_WRITE_CONFIG,
994 __pa(pdc_result), hpa,
995 cfg_addr&~3UL, 4UL, (unsigned long) val);
996 spin_unlock_irqrestore(&pdc_lock, flags);
997
998 return retval;
999}
1000#endif /* UNTESTED CODE */
1001
1002/**
1003 * pdc_tod_read - Read the Time-Of-Day clock.
1004 * @tod: The return buffer:
1005 *
1006 * Read the Time-Of-Day clock
1007 */
1008int pdc_tod_read(struct pdc_tod *tod)
1009{
1010 int retval;
1011 unsigned long flags;
1012
1013 spin_lock_irqsave(&pdc_lock, flags);
1014 retval = mem_pdc_call(PDC_TOD, PDC_TOD_READ, __pa(pdc_result), 0);
1015 convert_to_wide(pdc_result);
1016 memcpy(tod, pdc_result, sizeof(*tod));
1017 spin_unlock_irqrestore(&pdc_lock, flags);
1018
1019 return retval;
1020}
1021EXPORT_SYMBOL(pdc_tod_read);
1022
1023int pdc_mem_pdt_info(struct pdc_mem_retinfo *rinfo)
1024{
1025 int retval;
1026 unsigned long flags;
1027
1028 spin_lock_irqsave(&pdc_lock, flags);
1029 retval = mem_pdc_call(PDC_MEM, PDC_MEM_MEMINFO, __pa(pdc_result), 0);
1030 convert_to_wide(pdc_result);
1031 memcpy(rinfo, pdc_result, sizeof(*rinfo));
1032 spin_unlock_irqrestore(&pdc_lock, flags);
1033
1034 return retval;
1035}
1036
1037int pdc_mem_pdt_read_entries(struct pdc_mem_read_pdt *pret,
1038 unsigned long *pdt_entries_ptr)
1039{
1040 int retval;
1041 unsigned long flags;
1042
1043 spin_lock_irqsave(&pdc_lock, flags);
1044 retval = mem_pdc_call(PDC_MEM, PDC_MEM_READ_PDT, __pa(pdc_result),
1045 __pa(pdt_entries_ptr));
1046 if (retval == PDC_OK) {
1047 convert_to_wide(pdc_result);
1048 memcpy(pret, pdc_result, sizeof(*pret));
1049 }
1050 spin_unlock_irqrestore(&pdc_lock, flags);
1051
1052#ifdef CONFIG_64BIT
1053 /*
1054 * 64-bit kernels should not call this PDT function in narrow mode.
1055 * The pdt_entries_ptr array above will now contain 32-bit values
1056 */
1057 if (WARN_ON_ONCE((retval == PDC_OK) && parisc_narrow_firmware))
1058 return PDC_ERROR;
1059#endif
1060
1061 return retval;
1062}
1063
1064/**
1065 * pdc_tod_set - Set the Time-Of-Day clock.
1066 * @sec: The number of seconds since epoch.
1067 * @usec: The number of micro seconds.
1068 *
1069 * Set the Time-Of-Day clock.
1070 */
1071int pdc_tod_set(unsigned long sec, unsigned long usec)
1072{
1073 int retval;
1074 unsigned long flags;
1075
1076 spin_lock_irqsave(&pdc_lock, flags);
1077 retval = mem_pdc_call(PDC_TOD, PDC_TOD_WRITE, sec, usec);
1078 spin_unlock_irqrestore(&pdc_lock, flags);
1079
1080 return retval;
1081}
1082EXPORT_SYMBOL(pdc_tod_set);
1083
1084#ifdef CONFIG_64BIT
1085int pdc_mem_mem_table(struct pdc_memory_table_raddr *r_addr,
1086 struct pdc_memory_table *tbl, unsigned long entries)
1087{
1088 int retval;
1089 unsigned long flags;
1090
1091 spin_lock_irqsave(&pdc_lock, flags);
1092 retval = mem_pdc_call(PDC_MEM, PDC_MEM_TABLE, __pa(pdc_result), __pa(pdc_result2), entries);
1093 convert_to_wide(pdc_result);
1094 memcpy(r_addr, pdc_result, sizeof(*r_addr));
1095 memcpy(tbl, pdc_result2, entries * sizeof(*tbl));
1096 spin_unlock_irqrestore(&pdc_lock, flags);
1097
1098 return retval;
1099}
1100#endif /* CONFIG_64BIT */
1101
1102/* FIXME: Is this pdc used? I could not find type reference to ftc_bitmap
1103 * so I guessed at unsigned long. Someone who knows what this does, can fix
1104 * it later. :)
1105 */
1106int pdc_do_firm_test_reset(unsigned long ftc_bitmap)
1107{
1108 int retval;
1109 unsigned long flags;
1110
1111 spin_lock_irqsave(&pdc_lock, flags);
1112 retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_FIRM_TEST_RESET,
1113 PDC_FIRM_TEST_MAGIC, ftc_bitmap);
1114 spin_unlock_irqrestore(&pdc_lock, flags);
1115
1116 return retval;
1117}
1118
1119/*
1120 * pdc_do_reset - Reset the system.
1121 *
1122 * Reset the system.
1123 */
1124int pdc_do_reset(void)
1125{
1126 int retval;
1127 unsigned long flags;
1128
1129 spin_lock_irqsave(&pdc_lock, flags);
1130 retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_RESET);
1131 spin_unlock_irqrestore(&pdc_lock, flags);
1132
1133 return retval;
1134}
1135
1136/*
1137 * pdc_soft_power_info - Enable soft power switch.
1138 * @power_reg: address of soft power register
1139 *
1140 * Return the absolute address of the soft power switch register
1141 */
1142int __init pdc_soft_power_info(unsigned long *power_reg)
1143{
1144 int retval;
1145 unsigned long flags;
1146
1147 *power_reg = (unsigned long) (-1);
1148
1149 spin_lock_irqsave(&pdc_lock, flags);
1150 retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_INFO, __pa(pdc_result), 0);
1151 if (retval == PDC_OK) {
1152 convert_to_wide(pdc_result);
1153 *power_reg = f_extend(pdc_result[0]);
1154 }
1155 spin_unlock_irqrestore(&pdc_lock, flags);
1156
1157 return retval;
1158}
1159
1160/*
1161 * pdc_soft_power_button - Control the soft power button behaviour
1162 * @sw_control: 0 for hardware control, 1 for software control
1163 *
1164 *
1165 * This PDC function places the soft power button under software or
1166 * hardware control.
1167 * Under software control the OS may control to when to allow to shut
1168 * down the system. Under hardware control pressing the power button
1169 * powers off the system immediately.
1170 */
1171int pdc_soft_power_button(int sw_control)
1172{
1173 int retval;
1174 unsigned long flags;
1175
1176 spin_lock_irqsave(&pdc_lock, flags);
1177 retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_ENABLE, __pa(pdc_result), sw_control);
1178 spin_unlock_irqrestore(&pdc_lock, flags);
1179
1180 return retval;
1181}
1182
1183/*
1184 * pdc_io_reset - Hack to avoid overlapping range registers of Bridges devices.
1185 * Primarily a problem on T600 (which parisc-linux doesn't support) but
1186 * who knows what other platform firmware might do with this OS "hook".
1187 */
1188void pdc_io_reset(void)
1189{
1190 unsigned long flags;
1191
1192 spin_lock_irqsave(&pdc_lock, flags);
1193 mem_pdc_call(PDC_IO, PDC_IO_RESET, 0);
1194 spin_unlock_irqrestore(&pdc_lock, flags);
1195}
1196
1197/*
1198 * pdc_io_reset_devices - Hack to Stop USB controller
1199 *
1200 * If PDC used the usb controller, the usb controller
1201 * is still running and will crash the machines during iommu
1202 * setup, because of still running DMA. This PDC call
1203 * stops the USB controller.
1204 * Normally called after calling pdc_io_reset().
1205 */
1206void pdc_io_reset_devices(void)
1207{
1208 unsigned long flags;
1209
1210 spin_lock_irqsave(&pdc_lock, flags);
1211 mem_pdc_call(PDC_IO, PDC_IO_RESET_DEVICES, 0);
1212 spin_unlock_irqrestore(&pdc_lock, flags);
1213}
1214
1215#endif /* defined(BOOTLOADER) */
1216
1217/* locked by pdc_console_lock */
1218static int __attribute__((aligned(8))) iodc_retbuf[32];
1219static char __attribute__((aligned(64))) iodc_dbuf[4096];
1220
1221/**
1222 * pdc_iodc_print - Console print using IODC.
1223 * @str: the string to output.
1224 * @count: length of str
1225 *
1226 * Note that only these special chars are architected for console IODC io:
1227 * BEL, BS, CR, and LF. Others are passed through.
1228 * Since the HP console requires CR+LF to perform a 'newline', we translate
1229 * "\n" to "\r\n".
1230 */
1231int pdc_iodc_print(const unsigned char *str, unsigned count)
1232{
1233 unsigned int i;
1234 unsigned long flags;
1235
1236 for (i = 0; i < count;) {
1237 switch(str[i]) {
1238 case '\n':
1239 iodc_dbuf[i+0] = '\r';
1240 iodc_dbuf[i+1] = '\n';
1241 i += 2;
1242 goto print;
1243 default:
1244 iodc_dbuf[i] = str[i];
1245 i++;
1246 break;
1247 }
1248 }
1249
1250print:
1251 spin_lock_irqsave(&pdc_lock, flags);
1252 real32_call(PAGE0->mem_cons.iodc_io,
1253 (unsigned long)PAGE0->mem_cons.hpa, ENTRY_IO_COUT,
1254 PAGE0->mem_cons.spa, __pa(PAGE0->mem_cons.dp.layers),
1255 __pa(iodc_retbuf), 0, __pa(iodc_dbuf), i, 0);
1256 spin_unlock_irqrestore(&pdc_lock, flags);
1257
1258 return i;
1259}
1260
1261#if !defined(BOOTLOADER)
1262/**
1263 * pdc_iodc_getc - Read a character (non-blocking) from the PDC console.
1264 *
1265 * Read a character (non-blocking) from the PDC console, returns -1 if
1266 * key is not present.
1267 */
1268int pdc_iodc_getc(void)
1269{
1270 int ch;
1271 int status;
1272 unsigned long flags;
1273
1274 /* Bail if no console input device. */
1275 if (!PAGE0->mem_kbd.iodc_io)
1276 return 0;
1277
1278 /* wait for a keyboard (rs232)-input */
1279 spin_lock_irqsave(&pdc_lock, flags);
1280 real32_call(PAGE0->mem_kbd.iodc_io,
1281 (unsigned long)PAGE0->mem_kbd.hpa, ENTRY_IO_CIN,
1282 PAGE0->mem_kbd.spa, __pa(PAGE0->mem_kbd.dp.layers),
1283 __pa(iodc_retbuf), 0, __pa(iodc_dbuf), 1, 0);
1284
1285 ch = *iodc_dbuf;
1286 status = *iodc_retbuf;
1287 spin_unlock_irqrestore(&pdc_lock, flags);
1288
1289 if (status == 0)
1290 return -1;
1291
1292 return ch;
1293}
1294
1295int pdc_sti_call(unsigned long func, unsigned long flags,
1296 unsigned long inptr, unsigned long outputr,
1297 unsigned long glob_cfg)
1298{
1299 int retval;
1300 unsigned long irqflags;
1301
1302 spin_lock_irqsave(&pdc_lock, irqflags);
1303 retval = real32_call(func, flags, inptr, outputr, glob_cfg);
1304 spin_unlock_irqrestore(&pdc_lock, irqflags);
1305
1306 return retval;
1307}
1308EXPORT_SYMBOL(pdc_sti_call);
1309
1310#ifdef CONFIG_64BIT
1311/**
1312 * pdc_pat_cell_get_number - Returns the cell number.
1313 * @cell_info: The return buffer.
1314 *
1315 * This PDC call returns the cell number of the cell from which the call
1316 * is made.
1317 */
1318int pdc_pat_cell_get_number(struct pdc_pat_cell_num *cell_info)
1319{
1320 int retval;
1321 unsigned long flags;
1322
1323 spin_lock_irqsave(&pdc_lock, flags);
1324 retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_GET_NUMBER, __pa(pdc_result));
1325 memcpy(cell_info, pdc_result, sizeof(*cell_info));
1326 spin_unlock_irqrestore(&pdc_lock, flags);
1327
1328 return retval;
1329}
1330
1331/**
1332 * pdc_pat_cell_module - Retrieve the cell's module information.
1333 * @actcnt: The number of bytes written to mem_addr.
1334 * @ploc: The physical location.
1335 * @mod: The module index.
1336 * @view_type: The view of the address type.
1337 * @mem_addr: The return buffer.
1338 *
1339 * This PDC call returns information about each module attached to the cell
1340 * at the specified location.
1341 */
1342int pdc_pat_cell_module(unsigned long *actcnt, unsigned long ploc, unsigned long mod,
1343 unsigned long view_type, void *mem_addr)
1344{
1345 int retval;
1346 unsigned long flags;
1347 static struct pdc_pat_cell_mod_maddr_block result __attribute__ ((aligned (8)));
1348
1349 spin_lock_irqsave(&pdc_lock, flags);
1350 retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_MODULE, __pa(pdc_result),
1351 ploc, mod, view_type, __pa(&result));
1352 if(!retval) {
1353 *actcnt = pdc_result[0];
1354 memcpy(mem_addr, &result, *actcnt);
1355 }
1356 spin_unlock_irqrestore(&pdc_lock, flags);
1357
1358 return retval;
1359}
1360
1361/**
1362 * pdc_pat_cell_info - Retrieve the cell's information.
1363 * @info: The pointer to a struct pdc_pat_cell_info_rtn_block.
1364 * @actcnt: The number of bytes which should be written to info.
1365 * @offset: offset of the structure.
1366 * @cell_number: The cell number which should be asked, or -1 for current cell.
1367 *
1368 * This PDC call returns information about the given cell (or all cells).
1369 */
1370int pdc_pat_cell_info(struct pdc_pat_cell_info_rtn_block *info,
1371 unsigned long *actcnt, unsigned long offset,
1372 unsigned long cell_number)
1373{
1374 int retval;
1375 unsigned long flags;
1376 struct pdc_pat_cell_info_rtn_block result;
1377
1378 spin_lock_irqsave(&pdc_lock, flags);
1379 retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_GET_INFO,
1380 __pa(pdc_result), __pa(&result), *actcnt,
1381 offset, cell_number);
1382 if (!retval) {
1383 *actcnt = pdc_result[0];
1384 memcpy(info, &result, *actcnt);
1385 }
1386 spin_unlock_irqrestore(&pdc_lock, flags);
1387
1388 return retval;
1389}
1390
1391/**
1392 * pdc_pat_cpu_get_number - Retrieve the cpu number.
1393 * @cpu_info: The return buffer.
1394 * @hpa: The Hard Physical Address of the CPU.
1395 *
1396 * Retrieve the cpu number for the cpu at the specified HPA.
1397 */
1398int pdc_pat_cpu_get_number(struct pdc_pat_cpu_num *cpu_info, unsigned long hpa)
1399{
1400 int retval;
1401 unsigned long flags;
1402
1403 spin_lock_irqsave(&pdc_lock, flags);
1404 retval = mem_pdc_call(PDC_PAT_CPU, PDC_PAT_CPU_GET_NUMBER,
1405 __pa(&pdc_result), hpa);
1406 memcpy(cpu_info, pdc_result, sizeof(*cpu_info));
1407 spin_unlock_irqrestore(&pdc_lock, flags);
1408
1409 return retval;
1410}
1411
1412/**
1413 * pdc_pat_get_irt_size - Retrieve the number of entries in the cell's interrupt table.
1414 * @num_entries: The return value.
1415 * @cell_num: The target cell.
1416 *
1417 * This PDC function returns the number of entries in the specified cell's
1418 * interrupt table.
1419 */
1420int pdc_pat_get_irt_size(unsigned long *num_entries, unsigned long cell_num)
1421{
1422 int retval;
1423 unsigned long flags;
1424
1425 spin_lock_irqsave(&pdc_lock, flags);
1426 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE_SIZE,
1427 __pa(pdc_result), cell_num);
1428 *num_entries = pdc_result[0];
1429 spin_unlock_irqrestore(&pdc_lock, flags);
1430
1431 return retval;
1432}
1433
1434/**
1435 * pdc_pat_get_irt - Retrieve the cell's interrupt table.
1436 * @r_addr: The return buffer.
1437 * @cell_num: The target cell.
1438 *
1439 * This PDC function returns the actual interrupt table for the specified cell.
1440 */
1441int pdc_pat_get_irt(void *r_addr, unsigned long cell_num)
1442{
1443 int retval;
1444 unsigned long flags;
1445
1446 spin_lock_irqsave(&pdc_lock, flags);
1447 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE,
1448 __pa(r_addr), cell_num);
1449 spin_unlock_irqrestore(&pdc_lock, flags);
1450
1451 return retval;
1452}
1453
1454/**
1455 * pdc_pat_pd_get_addr_map - Retrieve information about memory address ranges.
1456 * @actlen: The return buffer.
1457 * @mem_addr: Pointer to the memory buffer.
1458 * @count: The number of bytes to read from the buffer.
1459 * @offset: The offset with respect to the beginning of the buffer.
1460 *
1461 */
1462int pdc_pat_pd_get_addr_map(unsigned long *actual_len, void *mem_addr,
1463 unsigned long count, unsigned long offset)
1464{
1465 int retval;
1466 unsigned long flags;
1467
1468 spin_lock_irqsave(&pdc_lock, flags);
1469 retval = mem_pdc_call(PDC_PAT_PD, PDC_PAT_PD_GET_ADDR_MAP, __pa(pdc_result),
1470 __pa(pdc_result2), count, offset);
1471 *actual_len = pdc_result[0];
1472 memcpy(mem_addr, pdc_result2, *actual_len);
1473 spin_unlock_irqrestore(&pdc_lock, flags);
1474
1475 return retval;
1476}
1477
1478/**
1479 * pdc_pat_pd_get_PDC_interface_revisions - Retrieve PDC interface revisions.
1480 * @legacy_rev: The legacy revision.
1481 * @pat_rev: The PAT revision.
1482 * @pdc_cap: The PDC capabilities.
1483 *
1484 */
1485int pdc_pat_pd_get_pdc_revisions(unsigned long *legacy_rev,
1486 unsigned long *pat_rev, unsigned long *pdc_cap)
1487{
1488 int retval;
1489 unsigned long flags;
1490
1491 spin_lock_irqsave(&pdc_lock, flags);
1492 retval = mem_pdc_call(PDC_PAT_PD, PDC_PAT_PD_GET_PDC_INTERF_REV,
1493 __pa(pdc_result));
1494 if (retval == PDC_OK) {
1495 *legacy_rev = pdc_result[0];
1496 *pat_rev = pdc_result[1];
1497 *pdc_cap = pdc_result[2];
1498 }
1499 spin_unlock_irqrestore(&pdc_lock, flags);
1500
1501 return retval;
1502}
1503
1504
1505/**
1506 * pdc_pat_io_pci_cfg_read - Read PCI configuration space.
1507 * @pci_addr: PCI configuration space address for which the read request is being made.
1508 * @pci_size: Size of read in bytes. Valid values are 1, 2, and 4.
1509 * @mem_addr: Pointer to return memory buffer.
1510 *
1511 */
1512int pdc_pat_io_pci_cfg_read(unsigned long pci_addr, int pci_size, u32 *mem_addr)
1513{
1514 int retval;
1515 unsigned long flags;
1516
1517 spin_lock_irqsave(&pdc_lock, flags);
1518 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_READ,
1519 __pa(pdc_result), pci_addr, pci_size);
1520 switch(pci_size) {
1521 case 1: *(u8 *) mem_addr = (u8) pdc_result[0]; break;
1522 case 2: *(u16 *)mem_addr = (u16) pdc_result[0]; break;
1523 case 4: *(u32 *)mem_addr = (u32) pdc_result[0]; break;
1524 }
1525 spin_unlock_irqrestore(&pdc_lock, flags);
1526
1527 return retval;
1528}
1529
1530/**
1531 * pdc_pat_io_pci_cfg_write - Retrieve information about memory address ranges.
1532 * @pci_addr: PCI configuration space address for which the write request is being made.
1533 * @pci_size: Size of write in bytes. Valid values are 1, 2, and 4.
1534 * @value: Pointer to 1, 2, or 4 byte value in low order end of argument to be
1535 * written to PCI Config space.
1536 *
1537 */
1538int pdc_pat_io_pci_cfg_write(unsigned long pci_addr, int pci_size, u32 val)
1539{
1540 int retval;
1541 unsigned long flags;
1542
1543 spin_lock_irqsave(&pdc_lock, flags);
1544 retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_WRITE,
1545 pci_addr, pci_size, val);
1546 spin_unlock_irqrestore(&pdc_lock, flags);
1547
1548 return retval;
1549}
1550
1551/**
1552 * pdc_pat_mem_pdc_info - Retrieve information about page deallocation table
1553 * @rinfo: memory pdt information
1554 *
1555 */
1556int pdc_pat_mem_pdt_info(struct pdc_pat_mem_retinfo *rinfo)
1557{
1558 int retval;
1559 unsigned long flags;
1560
1561 spin_lock_irqsave(&pdc_lock, flags);
1562 retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_PD_INFO,
1563 __pa(&pdc_result));
1564 if (retval == PDC_OK)
1565 memcpy(rinfo, &pdc_result, sizeof(*rinfo));
1566 spin_unlock_irqrestore(&pdc_lock, flags);
1567
1568 return retval;
1569}
1570
1571/**
1572 * pdc_pat_mem_pdt_cell_info - Retrieve information about page deallocation
1573 * table of a cell
1574 * @rinfo: memory pdt information
1575 * @cell: cell number
1576 *
1577 */
1578int pdc_pat_mem_pdt_cell_info(struct pdc_pat_mem_cell_pdt_retinfo *rinfo,
1579 unsigned long cell)
1580{
1581 int retval;
1582 unsigned long flags;
1583
1584 spin_lock_irqsave(&pdc_lock, flags);
1585 retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_CELL_INFO,
1586 __pa(&pdc_result), cell);
1587 if (retval == PDC_OK)
1588 memcpy(rinfo, &pdc_result, sizeof(*rinfo));
1589 spin_unlock_irqrestore(&pdc_lock, flags);
1590
1591 return retval;
1592}
1593
1594/**
1595 * pdc_pat_mem_read_cell_pdt - Read PDT entries from (old) PAT firmware
1596 * @pret: array of PDT entries
1597 * @pdt_entries_ptr: ptr to hold number of PDT entries
1598 * @max_entries: maximum number of entries to be read
1599 *
1600 */
1601int pdc_pat_mem_read_cell_pdt(struct pdc_pat_mem_read_pd_retinfo *pret,
1602 unsigned long *pdt_entries_ptr, unsigned long max_entries)
1603{
1604 int retval;
1605 unsigned long flags, entries;
1606
1607 spin_lock_irqsave(&pdc_lock, flags);
1608 /* PDC_PAT_MEM_CELL_READ is available on early PAT machines only */
1609 retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_CELL_READ,
1610 __pa(&pdc_result), parisc_cell_num,
1611 __pa(pdt_entries_ptr));
1612
1613 if (retval == PDC_OK) {
1614 /* build up return value as for PDC_PAT_MEM_PD_READ */
1615 entries = min(pdc_result[0], max_entries);
1616 pret->pdt_entries = entries;
1617 pret->actual_count_bytes = entries * sizeof(unsigned long);
1618 }
1619
1620 spin_unlock_irqrestore(&pdc_lock, flags);
1621 WARN_ON(retval == PDC_OK && pdc_result[0] > max_entries);
1622
1623 return retval;
1624}
1625/**
1626 * pdc_pat_mem_read_pd_pdt - Read PDT entries from (newer) PAT firmware
1627 * @pret: array of PDT entries
1628 * @pdt_entries_ptr: ptr to hold number of PDT entries
1629 * @count: number of bytes to read
1630 * @offset: offset to start (in bytes)
1631 *
1632 */
1633int pdc_pat_mem_read_pd_pdt(struct pdc_pat_mem_read_pd_retinfo *pret,
1634 unsigned long *pdt_entries_ptr, unsigned long count,
1635 unsigned long offset)
1636{
1637 int retval;
1638 unsigned long flags, entries;
1639
1640 spin_lock_irqsave(&pdc_lock, flags);
1641 retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_PD_READ,
1642 __pa(&pdc_result), __pa(pdt_entries_ptr),
1643 count, offset);
1644
1645 if (retval == PDC_OK) {
1646 entries = min(pdc_result[0], count);
1647 pret->actual_count_bytes = entries;
1648 pret->pdt_entries = entries / sizeof(unsigned long);
1649 }
1650
1651 spin_unlock_irqrestore(&pdc_lock, flags);
1652
1653 return retval;
1654}
1655
1656/**
1657 * pdc_pat_mem_get_dimm_phys_location - Get physical DIMM slot via PAT firmware
1658 * @pret: ptr to hold returned information
1659 * @phys_addr: physical address to examine
1660 *
1661 */
1662int pdc_pat_mem_get_dimm_phys_location(
1663 struct pdc_pat_mem_phys_mem_location *pret,
1664 unsigned long phys_addr)
1665{
1666 int retval;
1667 unsigned long flags;
1668
1669 spin_lock_irqsave(&pdc_lock, flags);
1670 retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_ADDRESS,
1671 __pa(&pdc_result), phys_addr);
1672
1673 if (retval == PDC_OK)
1674 memcpy(pret, &pdc_result, sizeof(*pret));
1675
1676 spin_unlock_irqrestore(&pdc_lock, flags);
1677
1678 return retval;
1679}
1680#endif /* CONFIG_64BIT */
1681#endif /* defined(BOOTLOADER) */
1682
1683
1684/***************** 32-bit real-mode calls ***********/
1685/* The struct below is used
1686 * to overlay real_stack (real2.S), preparing a 32-bit call frame.
1687 * real32_call_asm() then uses this stack in narrow real mode
1688 */
1689
1690struct narrow_stack {
1691 /* use int, not long which is 64 bits */
1692 unsigned int arg13;
1693 unsigned int arg12;
1694 unsigned int arg11;
1695 unsigned int arg10;
1696 unsigned int arg9;
1697 unsigned int arg8;
1698 unsigned int arg7;
1699 unsigned int arg6;
1700 unsigned int arg5;
1701 unsigned int arg4;
1702 unsigned int arg3;
1703 unsigned int arg2;
1704 unsigned int arg1;
1705 unsigned int arg0;
1706 unsigned int frame_marker[8];
1707 unsigned int sp;
1708 /* in reality, there's nearly 8k of stack after this */
1709};
1710
1711long real32_call(unsigned long fn, ...)
1712{
1713 va_list args;
1714 extern struct narrow_stack real_stack;
1715 extern unsigned long real32_call_asm(unsigned int *,
1716 unsigned int *,
1717 unsigned int);
1718
1719 va_start(args, fn);
1720 real_stack.arg0 = va_arg(args, unsigned int);
1721 real_stack.arg1 = va_arg(args, unsigned int);
1722 real_stack.arg2 = va_arg(args, unsigned int);
1723 real_stack.arg3 = va_arg(args, unsigned int);
1724 real_stack.arg4 = va_arg(args, unsigned int);
1725 real_stack.arg5 = va_arg(args, unsigned int);
1726 real_stack.arg6 = va_arg(args, unsigned int);
1727 real_stack.arg7 = va_arg(args, unsigned int);
1728 real_stack.arg8 = va_arg(args, unsigned int);
1729 real_stack.arg9 = va_arg(args, unsigned int);
1730 real_stack.arg10 = va_arg(args, unsigned int);
1731 real_stack.arg11 = va_arg(args, unsigned int);
1732 real_stack.arg12 = va_arg(args, unsigned int);
1733 real_stack.arg13 = va_arg(args, unsigned int);
1734 va_end(args);
1735
1736 return real32_call_asm(&real_stack.sp, &real_stack.arg0, fn);
1737}
1738
1739#ifdef CONFIG_64BIT
1740/***************** 64-bit real-mode calls ***********/
1741
1742struct wide_stack {
1743 unsigned long arg0;
1744 unsigned long arg1;
1745 unsigned long arg2;
1746 unsigned long arg3;
1747 unsigned long arg4;
1748 unsigned long arg5;
1749 unsigned long arg6;
1750 unsigned long arg7;
1751 unsigned long arg8;
1752 unsigned long arg9;
1753 unsigned long arg10;
1754 unsigned long arg11;
1755 unsigned long arg12;
1756 unsigned long arg13;
1757 unsigned long frame_marker[2]; /* rp, previous sp */
1758 unsigned long sp;
1759 /* in reality, there's nearly 8k of stack after this */
1760};
1761
1762long real64_call(unsigned long fn, ...)
1763{
1764 va_list args;
1765 extern struct wide_stack real64_stack;
1766 extern unsigned long real64_call_asm(unsigned long *,
1767 unsigned long *,
1768 unsigned long);
1769
1770 va_start(args, fn);
1771 real64_stack.arg0 = va_arg(args, unsigned long);
1772 real64_stack.arg1 = va_arg(args, unsigned long);
1773 real64_stack.arg2 = va_arg(args, unsigned long);
1774 real64_stack.arg3 = va_arg(args, unsigned long);
1775 real64_stack.arg4 = va_arg(args, unsigned long);
1776 real64_stack.arg5 = va_arg(args, unsigned long);
1777 real64_stack.arg6 = va_arg(args, unsigned long);
1778 real64_stack.arg7 = va_arg(args, unsigned long);
1779 real64_stack.arg8 = va_arg(args, unsigned long);
1780 real64_stack.arg9 = va_arg(args, unsigned long);
1781 real64_stack.arg10 = va_arg(args, unsigned long);
1782 real64_stack.arg11 = va_arg(args, unsigned long);
1783 real64_stack.arg12 = va_arg(args, unsigned long);
1784 real64_stack.arg13 = va_arg(args, unsigned long);
1785 va_end(args);
1786
1787 return real64_call_asm(&real64_stack.sp, &real64_stack.arg0, fn);
1788}
1789
1790#endif /* CONFIG_64BIT */