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 <linux/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 |
74 | static DEFINE_SPINLOCK(pdc_lock); |
75 | #endif |
76 | |
77 | static unsigned long pdc_result[NUM_PDC_RESULT] __aligned(8); |
78 | static unsigned long pdc_result2[NUM_PDC_RESULT] __aligned(8); |
79 | |
80 | #ifdef CONFIG_64BIT |
81 | #define WIDE_FIRMWARE PDC_MODEL_OS64 |
82 | #define NARROW_FIRMWARE PDC_MODEL_OS32 |
83 | |
84 | /* Firmware needs to be initially set to narrow to determine the |
85 | * actual firmware width. */ |
86 | int parisc_narrow_firmware __ro_after_init = NARROW_FIRMWARE; |
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 |
101 | long real64_call(unsigned long function, ...); |
102 | #endif |
103 | long 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 | */ |
121 | static 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 (0xfffffff0UL << 32) | (u32)address; |
127 | |
128 | if((address & 0xf0000000) == 0xf0000000) |
129 | return (0xffffffffUL << 32) | (u32)address; |
130 | } |
131 | #endif |
132 | return address; |
133 | } |
134 | |
135 | /** |
136 | * convert_to_wide - Convert the return buffer addresses into kernel addresses. |
137 | * @addr: 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 | */ |
143 | static 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 |
157 | void 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 | if (ret < 0) |
164 | return; |
165 | convert_to_wide(addr: pdc_result); |
166 | if (pdc_result[0] != NARROW_FIRMWARE) |
167 | parisc_narrow_firmware = 0; |
168 | } |
169 | |
170 | /** |
171 | * set_firmware_width - Determine if the firmware is wide or narrow. |
172 | * |
173 | * This function must be called before any pdc_* function that uses the |
174 | * convert_to_wide function. |
175 | */ |
176 | void set_firmware_width(void) |
177 | { |
178 | unsigned long flags; |
179 | |
180 | /* already initialized? */ |
181 | if (parisc_narrow_firmware != NARROW_FIRMWARE) |
182 | return; |
183 | |
184 | spin_lock_irqsave(&pdc_lock, flags); |
185 | set_firmware_width_unlocked(); |
186 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
187 | } |
188 | #else |
189 | void set_firmware_width_unlocked(void) |
190 | { |
191 | return; |
192 | } |
193 | |
194 | void set_firmware_width(void) |
195 | { |
196 | return; |
197 | } |
198 | #endif /*CONFIG_64BIT*/ |
199 | |
200 | |
201 | #if !defined(BOOTLOADER) |
202 | /** |
203 | * pdc_emergency_unlock - Unlock the linux pdc lock |
204 | * |
205 | * This call unlocks the linux pdc lock in case we need some PDC functions |
206 | * (like pdc_add_valid) during kernel stack dump. |
207 | */ |
208 | void pdc_emergency_unlock(void) |
209 | { |
210 | /* Spinlock DEBUG code freaks out if we unconditionally unlock */ |
211 | if (spin_is_locked(lock: &pdc_lock)) |
212 | spin_unlock(lock: &pdc_lock); |
213 | } |
214 | |
215 | |
216 | /** |
217 | * pdc_add_valid - Verify address can be accessed without causing a HPMC. |
218 | * @address: Address to be verified. |
219 | * |
220 | * This PDC call attempts to read from the specified address and verifies |
221 | * if the address is valid. |
222 | * |
223 | * The return value is PDC_OK (0) in case accessing this address is valid. |
224 | */ |
225 | int pdc_add_valid(unsigned long address) |
226 | { |
227 | int retval; |
228 | unsigned long flags; |
229 | |
230 | spin_lock_irqsave(&pdc_lock, flags); |
231 | retval = mem_pdc_call(PDC_ADD_VALID, PDC_ADD_VALID_VERIFY, address); |
232 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
233 | |
234 | return retval; |
235 | } |
236 | EXPORT_SYMBOL(pdc_add_valid); |
237 | |
238 | /** |
239 | * pdc_instr - Get instruction that invokes PDCE_CHECK in HPMC handler. |
240 | * @instr: Pointer to variable which will get instruction opcode. |
241 | * |
242 | * The return value is PDC_OK (0) in case call succeeded. |
243 | */ |
244 | int __init pdc_instr(unsigned int *instr) |
245 | { |
246 | int retval; |
247 | unsigned long flags; |
248 | |
249 | spin_lock_irqsave(&pdc_lock, flags); |
250 | retval = mem_pdc_call(PDC_INSTR, 0UL, __pa(pdc_result)); |
251 | convert_to_wide(addr: pdc_result); |
252 | *instr = pdc_result[0]; |
253 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
254 | |
255 | return retval; |
256 | } |
257 | |
258 | /** |
259 | * pdc_chassis_info - Return chassis information. |
260 | * @chassis_info: The memory buffer address. |
261 | * @led_info: The size of the memory buffer address. |
262 | * @len: The size of the memory buffer address. |
263 | * |
264 | * An HVERSION dependent call for returning the chassis information. |
265 | */ |
266 | int __init pdc_chassis_info(struct pdc_chassis_info *chassis_info, void *led_info, unsigned long len) |
267 | { |
268 | int retval; |
269 | unsigned long flags; |
270 | |
271 | spin_lock_irqsave(&pdc_lock, flags); |
272 | memcpy(&pdc_result, chassis_info, sizeof(*chassis_info)); |
273 | memcpy(&pdc_result2, led_info, len); |
274 | retval = mem_pdc_call(PDC_CHASSIS, PDC_RETURN_CHASSIS_INFO, |
275 | __pa(pdc_result), __pa(pdc_result2), len); |
276 | memcpy(chassis_info, pdc_result, sizeof(*chassis_info)); |
277 | memcpy(led_info, pdc_result2, len); |
278 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
279 | |
280 | return retval; |
281 | } |
282 | |
283 | /** |
284 | * pdc_pat_chassis_send_log - Sends a PDC PAT CHASSIS log message. |
285 | * @state: state of the machine |
286 | * @data: value for that state |
287 | * |
288 | * Must be correctly formatted or expect system crash |
289 | */ |
290 | #ifdef CONFIG_64BIT |
291 | int pdc_pat_chassis_send_log(unsigned long state, unsigned long data) |
292 | { |
293 | int retval = 0; |
294 | unsigned long flags; |
295 | |
296 | if (!is_pdc_pat()) |
297 | return -1; |
298 | |
299 | spin_lock_irqsave(&pdc_lock, flags); |
300 | retval = mem_pdc_call(PDC_PAT_CHASSIS_LOG, PDC_PAT_CHASSIS_WRITE_LOG, __pa(&state), __pa(&data)); |
301 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
302 | |
303 | return retval; |
304 | } |
305 | #endif |
306 | |
307 | /** |
308 | * pdc_chassis_disp - Updates chassis code |
309 | * @disp: value to show on display |
310 | */ |
311 | int pdc_chassis_disp(unsigned long disp) |
312 | { |
313 | int retval = 0; |
314 | unsigned long flags; |
315 | |
316 | spin_lock_irqsave(&pdc_lock, flags); |
317 | retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_DISP, disp); |
318 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
319 | |
320 | return retval; |
321 | } |
322 | |
323 | /** |
324 | * __pdc_cpu_rendezvous - Stop currently executing CPU and do not return. |
325 | */ |
326 | int __pdc_cpu_rendezvous(void) |
327 | { |
328 | if (is_pdc_pat()) |
329 | return mem_pdc_call(PDC_PAT_CPU, PDC_PAT_CPU_RENDEZVOUS); |
330 | else |
331 | return mem_pdc_call(PDC_PROC, 1, 0); |
332 | } |
333 | |
334 | /** |
335 | * pdc_cpu_rendezvous_lock - Lock PDC while transitioning to rendezvous state |
336 | */ |
337 | void pdc_cpu_rendezvous_lock(void) __acquires(&pdc_lock) |
338 | { |
339 | spin_lock(lock: &pdc_lock); |
340 | } |
341 | |
342 | /** |
343 | * pdc_cpu_rendezvous_unlock - Unlock PDC after reaching rendezvous state |
344 | */ |
345 | void pdc_cpu_rendezvous_unlock(void) __releases(&pdc_lock) |
346 | { |
347 | spin_unlock(lock: &pdc_lock); |
348 | } |
349 | |
350 | /** |
351 | * pdc_pat_get_PDC_entrypoint - Get PDC entry point for current CPU |
352 | * @pdc_entry: pointer to where the PDC entry point should be stored |
353 | */ |
354 | int pdc_pat_get_PDC_entrypoint(unsigned long *pdc_entry) |
355 | { |
356 | int retval = 0; |
357 | unsigned long flags; |
358 | |
359 | if (!IS_ENABLED(CONFIG_SMP) || !is_pdc_pat()) { |
360 | *pdc_entry = MEM_PDC; |
361 | return 0; |
362 | } |
363 | |
364 | spin_lock_irqsave(&pdc_lock, flags); |
365 | retval = mem_pdc_call(PDC_PAT_CPU, PDC_PAT_CPU_GET_PDC_ENTRYPOINT, |
366 | __pa(pdc_result)); |
367 | *pdc_entry = pdc_result[0]; |
368 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
369 | |
370 | return retval; |
371 | } |
372 | /** |
373 | * pdc_chassis_warn - Fetches chassis warnings |
374 | * @warn: The warning value to be shown |
375 | */ |
376 | int pdc_chassis_warn(unsigned long *warn) |
377 | { |
378 | int retval = 0; |
379 | unsigned long flags; |
380 | |
381 | spin_lock_irqsave(&pdc_lock, flags); |
382 | retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_WARN, __pa(pdc_result)); |
383 | *warn = pdc_result[0]; |
384 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
385 | |
386 | return retval; |
387 | } |
388 | |
389 | int pdc_coproc_cfg_unlocked(struct pdc_coproc_cfg *pdc_coproc_info) |
390 | { |
391 | int ret; |
392 | |
393 | ret = mem_pdc_call(PDC_COPROC, PDC_COPROC_CFG, __pa(pdc_result)); |
394 | convert_to_wide(addr: pdc_result); |
395 | pdc_coproc_info->ccr_functional = pdc_result[0]; |
396 | pdc_coproc_info->ccr_present = pdc_result[1]; |
397 | pdc_coproc_info->revision = pdc_result[17]; |
398 | pdc_coproc_info->model = pdc_result[18]; |
399 | |
400 | return ret; |
401 | } |
402 | |
403 | /** |
404 | * pdc_coproc_cfg - To identify coprocessors attached to the processor. |
405 | * @pdc_coproc_info: Return buffer address. |
406 | * |
407 | * This PDC call returns the presence and status of all the coprocessors |
408 | * attached to the processor. |
409 | */ |
410 | int pdc_coproc_cfg(struct pdc_coproc_cfg *pdc_coproc_info) |
411 | { |
412 | int ret; |
413 | unsigned long flags; |
414 | |
415 | spin_lock_irqsave(&pdc_lock, flags); |
416 | ret = pdc_coproc_cfg_unlocked(pdc_coproc_info); |
417 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
418 | |
419 | return ret; |
420 | } |
421 | |
422 | /** |
423 | * pdc_iodc_read - Read data from the modules IODC. |
424 | * @actcnt: The actual number of bytes. |
425 | * @hpa: The HPA of the module for the iodc read. |
426 | * @index: The iodc entry point. |
427 | * @iodc_data: A buffer memory for the iodc options. |
428 | * @iodc_data_size: Size of the memory buffer. |
429 | * |
430 | * This PDC call reads from the IODC of the module specified by the hpa |
431 | * argument. |
432 | */ |
433 | int pdc_iodc_read(unsigned long *actcnt, unsigned long hpa, unsigned int index, |
434 | void *iodc_data, unsigned int iodc_data_size) |
435 | { |
436 | int retval; |
437 | unsigned long flags; |
438 | |
439 | spin_lock_irqsave(&pdc_lock, flags); |
440 | retval = mem_pdc_call(PDC_IODC, PDC_IODC_READ, __pa(pdc_result), hpa, |
441 | index, __pa(pdc_result2), iodc_data_size); |
442 | convert_to_wide(addr: pdc_result); |
443 | *actcnt = pdc_result[0]; |
444 | memcpy(iodc_data, pdc_result2, iodc_data_size); |
445 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
446 | |
447 | return retval; |
448 | } |
449 | EXPORT_SYMBOL(pdc_iodc_read); |
450 | |
451 | /** |
452 | * pdc_system_map_find_mods - Locate unarchitected modules. |
453 | * @pdc_mod_info: Return buffer address. |
454 | * @mod_path: pointer to dev path structure. |
455 | * @mod_index: fixed address module index. |
456 | * |
457 | * To locate and identify modules which reside at fixed I/O addresses, which |
458 | * do not self-identify via architected bus walks. |
459 | */ |
460 | int pdc_system_map_find_mods(struct pdc_system_map_mod_info *pdc_mod_info, |
461 | struct pdc_module_path *mod_path, long mod_index) |
462 | { |
463 | int retval; |
464 | unsigned long flags; |
465 | |
466 | spin_lock_irqsave(&pdc_lock, flags); |
467 | retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_MODULE, __pa(pdc_result), |
468 | __pa(pdc_result2), mod_index); |
469 | convert_to_wide(addr: pdc_result); |
470 | memcpy(pdc_mod_info, pdc_result, sizeof(*pdc_mod_info)); |
471 | memcpy(mod_path, pdc_result2, sizeof(*mod_path)); |
472 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
473 | |
474 | pdc_mod_info->mod_addr = f_extend(address: pdc_mod_info->mod_addr); |
475 | return retval; |
476 | } |
477 | |
478 | /** |
479 | * pdc_system_map_find_addrs - Retrieve additional address ranges. |
480 | * @pdc_addr_info: Return buffer address. |
481 | * @mod_index: Fixed address module index. |
482 | * @addr_index: Address range index. |
483 | * |
484 | * Retrieve additional information about subsequent address ranges for modules |
485 | * with multiple address ranges. |
486 | */ |
487 | int pdc_system_map_find_addrs(struct pdc_system_map_addr_info *pdc_addr_info, |
488 | long mod_index, long addr_index) |
489 | { |
490 | int retval; |
491 | unsigned long flags; |
492 | |
493 | spin_lock_irqsave(&pdc_lock, flags); |
494 | retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_ADDRESS, __pa(pdc_result), |
495 | mod_index, addr_index); |
496 | convert_to_wide(addr: pdc_result); |
497 | memcpy(pdc_addr_info, pdc_result, sizeof(*pdc_addr_info)); |
498 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
499 | |
500 | pdc_addr_info->mod_addr = f_extend(address: pdc_addr_info->mod_addr); |
501 | return retval; |
502 | } |
503 | |
504 | /** |
505 | * pdc_model_info - Return model information about the processor. |
506 | * @model: The return buffer. |
507 | * |
508 | * Returns the version numbers, identifiers, and capabilities from the processor module. |
509 | */ |
510 | int pdc_model_info(struct pdc_model *model) |
511 | { |
512 | int retval; |
513 | unsigned long flags; |
514 | |
515 | spin_lock_irqsave(&pdc_lock, flags); |
516 | retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_INFO, __pa(pdc_result), 0); |
517 | convert_to_wide(addr: pdc_result); |
518 | memcpy(model, pdc_result, sizeof(*model)); |
519 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
520 | |
521 | return retval; |
522 | } |
523 | |
524 | /** |
525 | * pdc_model_sysmodel - Get the system model name. |
526 | * @os_id: The operating system ID asked for (an OS_ID_* value) |
527 | * @name: A char array of at least 81 characters. |
528 | * |
529 | * Get system model name from PDC ROM (e.g. 9000/715 or 9000/778/B160L). |
530 | * Using OS_ID_HPUX will return the equivalent of the 'modelname' command |
531 | * on HP/UX. |
532 | */ |
533 | int pdc_model_sysmodel(unsigned int os_id, char *name) |
534 | { |
535 | int retval; |
536 | unsigned long flags; |
537 | |
538 | spin_lock_irqsave(&pdc_lock, flags); |
539 | retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_SYSMODEL, __pa(pdc_result), |
540 | os_id, __pa(name)); |
541 | convert_to_wide(addr: pdc_result); |
542 | |
543 | if (retval == PDC_OK) { |
544 | name[pdc_result[0]] = '\0'; /* add trailing '\0' */ |
545 | } else { |
546 | name[0] = 0; |
547 | } |
548 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
549 | |
550 | return retval; |
551 | } |
552 | |
553 | /** |
554 | * pdc_model_versions - Identify the version number of each processor. |
555 | * @versions: The return buffer. |
556 | * @id: The id of the processor to check. |
557 | * |
558 | * Returns the version number for each processor component. |
559 | * |
560 | * This comment was here before, but I do not know what it means :( -RB |
561 | * id: 0 = cpu revision, 1 = boot-rom-version |
562 | */ |
563 | int pdc_model_versions(unsigned long *versions, int id) |
564 | { |
565 | int retval; |
566 | unsigned long flags; |
567 | |
568 | spin_lock_irqsave(&pdc_lock, flags); |
569 | retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_VERSIONS, __pa(pdc_result), id); |
570 | convert_to_wide(addr: pdc_result); |
571 | *versions = pdc_result[0]; |
572 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
573 | |
574 | return retval; |
575 | } |
576 | |
577 | /** |
578 | * pdc_model_cpuid - Returns the CPU_ID. |
579 | * @cpu_id: The return buffer. |
580 | * |
581 | * Returns the CPU_ID value which uniquely identifies the cpu portion of |
582 | * the processor module. |
583 | */ |
584 | int pdc_model_cpuid(unsigned long *cpu_id) |
585 | { |
586 | int retval; |
587 | unsigned long flags; |
588 | |
589 | spin_lock_irqsave(&pdc_lock, flags); |
590 | pdc_result[0] = 0; /* preset zero (call may not be implemented!) */ |
591 | retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CPU_ID, __pa(pdc_result), 0); |
592 | convert_to_wide(addr: pdc_result); |
593 | *cpu_id = pdc_result[0]; |
594 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
595 | |
596 | return retval; |
597 | } |
598 | |
599 | /** |
600 | * pdc_model_capabilities - Returns the platform capabilities. |
601 | * @capabilities: The return buffer. |
602 | * |
603 | * Returns information about platform support for 32- and/or 64-bit |
604 | * OSes, IO-PDIR coherency, and virtual aliasing. |
605 | */ |
606 | int pdc_model_capabilities(unsigned long *capabilities) |
607 | { |
608 | int retval; |
609 | unsigned long flags; |
610 | |
611 | spin_lock_irqsave(&pdc_lock, flags); |
612 | pdc_result[0] = 0; /* preset zero (call may not be implemented!) */ |
613 | retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES, __pa(pdc_result), 0); |
614 | convert_to_wide(addr: pdc_result); |
615 | if (retval == PDC_OK) { |
616 | *capabilities = pdc_result[0]; |
617 | } else { |
618 | *capabilities = PDC_MODEL_OS32; |
619 | } |
620 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
621 | |
622 | return retval; |
623 | } |
624 | |
625 | /** |
626 | * pdc_model_platform_info - Returns machine product and serial number. |
627 | * @orig_prod_num: Return buffer for original product number. |
628 | * @current_prod_num: Return buffer for current product number. |
629 | * @serial_no: Return buffer for serial number. |
630 | * |
631 | * Returns strings containing the original and current product numbers and the |
632 | * serial number of the system. |
633 | */ |
634 | int pdc_model_platform_info(char *orig_prod_num, char *current_prod_num, |
635 | char *serial_no) |
636 | { |
637 | int retval; |
638 | unsigned long flags; |
639 | |
640 | spin_lock_irqsave(&pdc_lock, flags); |
641 | retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_GET_PLATFORM_INFO, |
642 | __pa(orig_prod_num), __pa(current_prod_num), __pa(serial_no)); |
643 | convert_to_wide(addr: pdc_result); |
644 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
645 | |
646 | return retval; |
647 | } |
648 | |
649 | /** |
650 | * pdc_cache_info - Return cache and TLB information. |
651 | * @cache_info: The return buffer. |
652 | * |
653 | * Returns information about the processor's cache and TLB. |
654 | */ |
655 | int pdc_cache_info(struct pdc_cache_info *cache_info) |
656 | { |
657 | int retval; |
658 | unsigned long flags; |
659 | |
660 | spin_lock_irqsave(&pdc_lock, flags); |
661 | retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_INFO, __pa(pdc_result), 0); |
662 | convert_to_wide(addr: pdc_result); |
663 | memcpy(cache_info, pdc_result, sizeof(*cache_info)); |
664 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
665 | |
666 | return retval; |
667 | } |
668 | |
669 | /** |
670 | * pdc_spaceid_bits - Return whether Space ID hashing is turned on. |
671 | * @space_bits: Should be 0, if not, bad mojo! |
672 | * |
673 | * Returns information about Space ID hashing. |
674 | */ |
675 | int pdc_spaceid_bits(unsigned long *space_bits) |
676 | { |
677 | int retval; |
678 | unsigned long flags; |
679 | |
680 | spin_lock_irqsave(&pdc_lock, flags); |
681 | pdc_result[0] = 0; |
682 | retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_RET_SPID, __pa(pdc_result), 0); |
683 | convert_to_wide(addr: pdc_result); |
684 | *space_bits = pdc_result[0]; |
685 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
686 | |
687 | return retval; |
688 | } |
689 | |
690 | /** |
691 | * pdc_btlb_info - Return block TLB information. |
692 | * @btlb: The return buffer. |
693 | * |
694 | * Returns information about the hardware Block TLB. |
695 | */ |
696 | int pdc_btlb_info(struct pdc_btlb_info *btlb) |
697 | { |
698 | int retval; |
699 | unsigned long flags; |
700 | |
701 | if (IS_ENABLED(CONFIG_PA20)) |
702 | return PDC_BAD_PROC; |
703 | |
704 | spin_lock_irqsave(&pdc_lock, flags); |
705 | retval = mem_pdc_call(PDC_BLOCK_TLB, PDC_BTLB_INFO, __pa(pdc_result), 0); |
706 | memcpy(btlb, pdc_result, sizeof(*btlb)); |
707 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
708 | |
709 | if(retval < 0) { |
710 | btlb->max_size = 0; |
711 | } |
712 | return retval; |
713 | } |
714 | |
715 | int pdc_btlb_insert(unsigned long long vpage, unsigned long physpage, unsigned long len, |
716 | unsigned long entry_info, unsigned long slot) |
717 | { |
718 | int retval; |
719 | unsigned long flags; |
720 | |
721 | if (IS_ENABLED(CONFIG_PA20)) |
722 | return PDC_BAD_PROC; |
723 | |
724 | spin_lock_irqsave(&pdc_lock, flags); |
725 | retval = mem_pdc_call(PDC_BLOCK_TLB, PDC_BTLB_INSERT, (unsigned long) (vpage >> 32), |
726 | (unsigned long) vpage, physpage, len, entry_info, slot); |
727 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
728 | return retval; |
729 | } |
730 | |
731 | int pdc_btlb_purge_all(void) |
732 | { |
733 | int retval; |
734 | unsigned long flags; |
735 | |
736 | if (IS_ENABLED(CONFIG_PA20)) |
737 | return PDC_BAD_PROC; |
738 | |
739 | spin_lock_irqsave(&pdc_lock, flags); |
740 | retval = mem_pdc_call(PDC_BLOCK_TLB, PDC_BTLB_PURGE_ALL); |
741 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
742 | return retval; |
743 | } |
744 | |
745 | /** |
746 | * pdc_mem_map_hpa - Find fixed module information. |
747 | * @address: The return buffer |
748 | * @mod_path: pointer to dev path structure. |
749 | * |
750 | * This call was developed for S700 workstations to allow the kernel to find |
751 | * the I/O devices (Core I/O). In the future (Kittyhawk and beyond) this |
752 | * call will be replaced (on workstations) by the architected PDC_SYSTEM_MAP |
753 | * call. |
754 | * |
755 | * This call is supported by all existing S700 workstations (up to Gecko). |
756 | */ |
757 | int pdc_mem_map_hpa(struct pdc_memory_map *address, |
758 | struct pdc_module_path *mod_path) |
759 | { |
760 | int retval; |
761 | unsigned long flags; |
762 | |
763 | if (IS_ENABLED(CONFIG_PA20)) |
764 | return PDC_BAD_PROC; |
765 | |
766 | spin_lock_irqsave(&pdc_lock, flags); |
767 | memcpy(pdc_result2, mod_path, sizeof(*mod_path)); |
768 | retval = mem_pdc_call(PDC_MEM_MAP, PDC_MEM_MAP_HPA, __pa(pdc_result), |
769 | __pa(pdc_result2)); |
770 | memcpy(address, pdc_result, sizeof(*address)); |
771 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
772 | |
773 | return retval; |
774 | } |
775 | |
776 | /** |
777 | * pdc_lan_station_id - Get the LAN address. |
778 | * @lan_addr: The return buffer. |
779 | * @hpa: The network device HPA. |
780 | * |
781 | * Get the LAN station address when it is not directly available from the LAN hardware. |
782 | */ |
783 | int pdc_lan_station_id(char *lan_addr, unsigned long hpa) |
784 | { |
785 | int retval; |
786 | unsigned long flags; |
787 | |
788 | spin_lock_irqsave(&pdc_lock, flags); |
789 | retval = mem_pdc_call(PDC_LAN_STATION_ID, PDC_LAN_STATION_ID_READ, |
790 | __pa(pdc_result), hpa); |
791 | if (retval < 0) { |
792 | /* FIXME: else read MAC from NVRAM */ |
793 | memset(lan_addr, 0, PDC_LAN_STATION_ID_SIZE); |
794 | } else { |
795 | memcpy(lan_addr, pdc_result, PDC_LAN_STATION_ID_SIZE); |
796 | } |
797 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
798 | |
799 | return retval; |
800 | } |
801 | EXPORT_SYMBOL(pdc_lan_station_id); |
802 | |
803 | /** |
804 | * pdc_stable_read - Read data from Stable Storage. |
805 | * @staddr: Stable Storage address to access. |
806 | * @memaddr: The memory address where Stable Storage data shall be copied. |
807 | * @count: number of bytes to transfer. count is multiple of 4. |
808 | * |
809 | * This PDC call reads from the Stable Storage address supplied in staddr |
810 | * and copies count bytes to the memory address memaddr. |
811 | * The call will fail if staddr+count > PDC_STABLE size. |
812 | */ |
813 | int pdc_stable_read(unsigned long staddr, void *memaddr, unsigned long count) |
814 | { |
815 | int retval; |
816 | unsigned long flags; |
817 | |
818 | spin_lock_irqsave(&pdc_lock, flags); |
819 | retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_READ, staddr, |
820 | __pa(pdc_result), count); |
821 | convert_to_wide(addr: pdc_result); |
822 | memcpy(memaddr, pdc_result, count); |
823 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
824 | |
825 | return retval; |
826 | } |
827 | EXPORT_SYMBOL(pdc_stable_read); |
828 | |
829 | /** |
830 | * pdc_stable_write - Write data to Stable Storage. |
831 | * @staddr: Stable Storage address to access. |
832 | * @memaddr: The memory address where Stable Storage data shall be read from. |
833 | * @count: number of bytes to transfer. count is multiple of 4. |
834 | * |
835 | * This PDC call reads count bytes from the supplied memaddr address, |
836 | * and copies count bytes to the Stable Storage address staddr. |
837 | * The call will fail if staddr+count > PDC_STABLE size. |
838 | */ |
839 | int pdc_stable_write(unsigned long staddr, void *memaddr, unsigned long count) |
840 | { |
841 | int retval; |
842 | unsigned long flags; |
843 | |
844 | spin_lock_irqsave(&pdc_lock, flags); |
845 | memcpy(pdc_result, memaddr, count); |
846 | convert_to_wide(addr: pdc_result); |
847 | retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_WRITE, staddr, |
848 | __pa(pdc_result), count); |
849 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
850 | |
851 | return retval; |
852 | } |
853 | EXPORT_SYMBOL(pdc_stable_write); |
854 | |
855 | /** |
856 | * pdc_stable_get_size - Get Stable Storage size in bytes. |
857 | * @size: pointer where the size will be stored. |
858 | * |
859 | * This PDC call returns the number of bytes in the processor's Stable |
860 | * Storage, which is the number of contiguous bytes implemented in Stable |
861 | * Storage starting from staddr=0. size in an unsigned 64-bit integer |
862 | * which is a multiple of four. |
863 | */ |
864 | int pdc_stable_get_size(unsigned long *size) |
865 | { |
866 | int retval; |
867 | unsigned long flags; |
868 | |
869 | spin_lock_irqsave(&pdc_lock, flags); |
870 | retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_RETURN_SIZE, __pa(pdc_result)); |
871 | *size = pdc_result[0]; |
872 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
873 | |
874 | return retval; |
875 | } |
876 | EXPORT_SYMBOL(pdc_stable_get_size); |
877 | |
878 | /** |
879 | * pdc_stable_verify_contents - Checks that Stable Storage contents are valid. |
880 | * |
881 | * This PDC call is meant to be used to check the integrity of the current |
882 | * contents of Stable Storage. |
883 | */ |
884 | int pdc_stable_verify_contents(void) |
885 | { |
886 | int retval; |
887 | unsigned long flags; |
888 | |
889 | spin_lock_irqsave(&pdc_lock, flags); |
890 | retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_VERIFY_CONTENTS); |
891 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
892 | |
893 | return retval; |
894 | } |
895 | EXPORT_SYMBOL(pdc_stable_verify_contents); |
896 | |
897 | /** |
898 | * pdc_stable_initialize - Sets Stable Storage contents to zero and initialize |
899 | * the validity indicator. |
900 | * |
901 | * This PDC call will erase all contents of Stable Storage. Use with care! |
902 | */ |
903 | int pdc_stable_initialize(void) |
904 | { |
905 | int retval; |
906 | unsigned long flags; |
907 | |
908 | spin_lock_irqsave(&pdc_lock, flags); |
909 | retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_INITIALIZE); |
910 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
911 | |
912 | return retval; |
913 | } |
914 | EXPORT_SYMBOL(pdc_stable_initialize); |
915 | |
916 | /** |
917 | * pdc_get_initiator - Get the SCSI Interface Card params (SCSI ID, SDTR, SE or LVD) |
918 | * @hwpath: fully bc.mod style path to the device. |
919 | * @initiator: the array to return the result into |
920 | * |
921 | * Get the SCSI operational parameters from PDC. |
922 | * Needed since HPUX never used BIOS or symbios card NVRAM. |
923 | * Most ncr/sym cards won't have an entry and just use whatever |
924 | * capabilities of the card are (eg Ultra, LVD). But there are |
925 | * several cases where it's useful: |
926 | * o set SCSI id for Multi-initiator clusters, |
927 | * o cable too long (ie SE scsi 10Mhz won't support 6m length), |
928 | * o bus width exported is less than what the interface chip supports. |
929 | */ |
930 | int pdc_get_initiator(struct hardware_path *hwpath, struct pdc_initiator *initiator) |
931 | { |
932 | int retval; |
933 | unsigned long flags; |
934 | |
935 | spin_lock_irqsave(&pdc_lock, flags); |
936 | |
937 | /* BCJ-XXXX series boxes. E.G. "9000/785/C3000" */ |
938 | #define IS_SPROCKETS() (strlen(boot_cpu_data.pdc.sys_model_name) == 14 && \ |
939 | strncmp(boot_cpu_data.pdc.sys_model_name, "9000/785", 8) == 0) |
940 | |
941 | retval = mem_pdc_call(PDC_INITIATOR, PDC_GET_INITIATOR, |
942 | __pa(pdc_result), __pa(hwpath)); |
943 | if (retval < PDC_OK) |
944 | goto out; |
945 | |
946 | if (pdc_result[0] < 16) { |
947 | initiator->host_id = pdc_result[0]; |
948 | } else { |
949 | initiator->host_id = -1; |
950 | } |
951 | |
952 | /* |
953 | * Sprockets and Piranha return 20 or 40 (MT/s). Prelude returns |
954 | * 1, 2, 5 or 10 for 5, 10, 20 or 40 MT/s, respectively |
955 | */ |
956 | switch (pdc_result[1]) { |
957 | case 1: initiator->factor = 50; break; |
958 | case 2: initiator->factor = 25; break; |
959 | case 5: initiator->factor = 12; break; |
960 | case 25: initiator->factor = 10; break; |
961 | case 20: initiator->factor = 12; break; |
962 | case 40: initiator->factor = 10; break; |
963 | default: initiator->factor = -1; break; |
964 | } |
965 | |
966 | if (IS_SPROCKETS()) { |
967 | initiator->width = pdc_result[4]; |
968 | initiator->mode = pdc_result[5]; |
969 | } else { |
970 | initiator->width = -1; |
971 | initiator->mode = -1; |
972 | } |
973 | |
974 | out: |
975 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
976 | |
977 | return (retval >= PDC_OK); |
978 | } |
979 | EXPORT_SYMBOL(pdc_get_initiator); |
980 | |
981 | |
982 | /** |
983 | * pdc_pci_irt_size - Get the number of entries in the interrupt routing table. |
984 | * @num_entries: The return value. |
985 | * @hpa: The HPA for the device. |
986 | * |
987 | * This PDC function returns the number of entries in the specified cell's |
988 | * interrupt table. |
989 | * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes |
990 | */ |
991 | int pdc_pci_irt_size(unsigned long *num_entries, unsigned long hpa) |
992 | { |
993 | int retval; |
994 | unsigned long flags; |
995 | |
996 | spin_lock_irqsave(&pdc_lock, flags); |
997 | retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL_SIZE, |
998 | __pa(pdc_result), hpa); |
999 | convert_to_wide(addr: pdc_result); |
1000 | *num_entries = pdc_result[0]; |
1001 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1002 | |
1003 | return retval; |
1004 | } |
1005 | |
1006 | /** |
1007 | * pdc_pci_irt - Get the PCI interrupt routing table. |
1008 | * @num_entries: The number of entries in the table. |
1009 | * @hpa: The Hard Physical Address of the device. |
1010 | * @tbl: |
1011 | * |
1012 | * Get the PCI interrupt routing table for the device at the given HPA. |
1013 | * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes |
1014 | */ |
1015 | int pdc_pci_irt(unsigned long num_entries, unsigned long hpa, void *tbl) |
1016 | { |
1017 | int retval; |
1018 | unsigned long flags; |
1019 | |
1020 | BUG_ON((unsigned long)tbl & 0x7); |
1021 | |
1022 | spin_lock_irqsave(&pdc_lock, flags); |
1023 | pdc_result[0] = num_entries; |
1024 | retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL, |
1025 | __pa(pdc_result), hpa, __pa(tbl)); |
1026 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1027 | |
1028 | return retval; |
1029 | } |
1030 | |
1031 | |
1032 | #if 0 /* UNTEST CODE - left here in case someone needs it */ |
1033 | |
1034 | /** |
1035 | * pdc_pci_config_read - read PCI config space. |
1036 | * @hpa: Token from PDC to indicate which PCI device |
1037 | * @cfg_addr: Configuration space address to read from |
1038 | * |
1039 | * Read PCI Configuration space *before* linux PCI subsystem is running. |
1040 | */ |
1041 | unsigned int pdc_pci_config_read(void *hpa, unsigned long cfg_addr) |
1042 | { |
1043 | int retval; |
1044 | unsigned long flags; |
1045 | |
1046 | spin_lock_irqsave(&pdc_lock, flags); |
1047 | pdc_result[0] = 0; |
1048 | pdc_result[1] = 0; |
1049 | retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_READ_CONFIG, |
1050 | __pa(pdc_result), hpa, cfg_addr&~3UL, 4UL); |
1051 | spin_unlock_irqrestore(&pdc_lock, flags); |
1052 | |
1053 | return retval ? ~0 : (unsigned int) pdc_result[0]; |
1054 | } |
1055 | |
1056 | |
1057 | /** |
1058 | * pdc_pci_config_write - read PCI config space. |
1059 | * @hpa: Token from PDC to indicate which PCI device |
1060 | * @cfg_addr: Configuration space address to write |
1061 | * @val: Value we want in the 32-bit register |
1062 | * |
1063 | * Write PCI Configuration space *before* linux PCI subsystem is running. |
1064 | */ |
1065 | void pdc_pci_config_write(void *hpa, unsigned long cfg_addr, unsigned int val) |
1066 | { |
1067 | int retval; |
1068 | unsigned long flags; |
1069 | |
1070 | spin_lock_irqsave(&pdc_lock, flags); |
1071 | pdc_result[0] = 0; |
1072 | retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_WRITE_CONFIG, |
1073 | __pa(pdc_result), hpa, |
1074 | cfg_addr&~3UL, 4UL, (unsigned long) val); |
1075 | spin_unlock_irqrestore(&pdc_lock, flags); |
1076 | |
1077 | return retval; |
1078 | } |
1079 | #endif /* UNTESTED CODE */ |
1080 | |
1081 | /** |
1082 | * pdc_tod_read - Read the Time-Of-Day clock. |
1083 | * @tod: The return buffer: |
1084 | * |
1085 | * Read the Time-Of-Day clock |
1086 | */ |
1087 | int pdc_tod_read(struct pdc_tod *tod) |
1088 | { |
1089 | int retval; |
1090 | unsigned long flags; |
1091 | |
1092 | spin_lock_irqsave(&pdc_lock, flags); |
1093 | retval = mem_pdc_call(PDC_TOD, PDC_TOD_READ, __pa(pdc_result), 0); |
1094 | convert_to_wide(addr: pdc_result); |
1095 | memcpy(tod, pdc_result, sizeof(*tod)); |
1096 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1097 | |
1098 | return retval; |
1099 | } |
1100 | EXPORT_SYMBOL(pdc_tod_read); |
1101 | |
1102 | int pdc_mem_pdt_info(struct pdc_mem_retinfo *rinfo) |
1103 | { |
1104 | int retval; |
1105 | unsigned long flags; |
1106 | |
1107 | spin_lock_irqsave(&pdc_lock, flags); |
1108 | retval = mem_pdc_call(PDC_MEM, PDC_MEM_MEMINFO, __pa(pdc_result), 0); |
1109 | convert_to_wide(addr: pdc_result); |
1110 | memcpy(rinfo, pdc_result, sizeof(*rinfo)); |
1111 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1112 | |
1113 | return retval; |
1114 | } |
1115 | |
1116 | int pdc_mem_pdt_read_entries(struct pdc_mem_read_pdt *pret, |
1117 | unsigned long *pdt_entries_ptr) |
1118 | { |
1119 | int retval; |
1120 | unsigned long flags; |
1121 | |
1122 | spin_lock_irqsave(&pdc_lock, flags); |
1123 | retval = mem_pdc_call(PDC_MEM, PDC_MEM_READ_PDT, __pa(pdc_result), |
1124 | __pa(pdt_entries_ptr)); |
1125 | if (retval == PDC_OK) { |
1126 | convert_to_wide(addr: pdc_result); |
1127 | memcpy(pret, pdc_result, sizeof(*pret)); |
1128 | } |
1129 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1130 | |
1131 | #ifdef CONFIG_64BIT |
1132 | /* |
1133 | * 64-bit kernels should not call this PDT function in narrow mode. |
1134 | * The pdt_entries_ptr array above will now contain 32-bit values |
1135 | */ |
1136 | if (WARN_ON_ONCE((retval == PDC_OK) && parisc_narrow_firmware)) |
1137 | return PDC_ERROR; |
1138 | #endif |
1139 | |
1140 | return retval; |
1141 | } |
1142 | |
1143 | /** |
1144 | * pdc_pim_toc11 - Fetch TOC PIM 1.1 data from firmware. |
1145 | * @ret: pointer to return buffer |
1146 | */ |
1147 | int pdc_pim_toc11(struct pdc_toc_pim_11 *ret) |
1148 | { |
1149 | int retval; |
1150 | unsigned long flags; |
1151 | |
1152 | spin_lock_irqsave(&pdc_lock, flags); |
1153 | retval = mem_pdc_call(PDC_PIM, PDC_PIM_TOC, __pa(pdc_result), |
1154 | __pa(ret), sizeof(*ret)); |
1155 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1156 | return retval; |
1157 | } |
1158 | |
1159 | /** |
1160 | * pdc_pim_toc20 - Fetch TOC PIM 2.0 data from firmware. |
1161 | * @ret: pointer to return buffer |
1162 | */ |
1163 | int pdc_pim_toc20(struct pdc_toc_pim_20 *ret) |
1164 | { |
1165 | int retval; |
1166 | unsigned long flags; |
1167 | |
1168 | spin_lock_irqsave(&pdc_lock, flags); |
1169 | retval = mem_pdc_call(PDC_PIM, PDC_PIM_TOC, __pa(pdc_result), |
1170 | __pa(ret), sizeof(*ret)); |
1171 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1172 | return retval; |
1173 | } |
1174 | |
1175 | /** |
1176 | * pdc_tod_set - Set the Time-Of-Day clock. |
1177 | * @sec: The number of seconds since epoch. |
1178 | * @usec: The number of micro seconds. |
1179 | * |
1180 | * Set the Time-Of-Day clock. |
1181 | */ |
1182 | int pdc_tod_set(unsigned long sec, unsigned long usec) |
1183 | { |
1184 | int retval; |
1185 | unsigned long flags; |
1186 | |
1187 | spin_lock_irqsave(&pdc_lock, flags); |
1188 | retval = mem_pdc_call(PDC_TOD, PDC_TOD_WRITE, sec, usec); |
1189 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1190 | |
1191 | return retval; |
1192 | } |
1193 | EXPORT_SYMBOL(pdc_tod_set); |
1194 | |
1195 | #ifdef CONFIG_64BIT |
1196 | int pdc_mem_mem_table(struct pdc_memory_table_raddr *r_addr, |
1197 | struct pdc_memory_table *tbl, unsigned long entries) |
1198 | { |
1199 | int retval; |
1200 | unsigned long flags; |
1201 | |
1202 | spin_lock_irqsave(&pdc_lock, flags); |
1203 | retval = mem_pdc_call(PDC_MEM, PDC_MEM_TABLE, __pa(pdc_result), __pa(pdc_result2), entries); |
1204 | convert_to_wide(addr: pdc_result); |
1205 | memcpy(r_addr, pdc_result, sizeof(*r_addr)); |
1206 | memcpy(tbl, pdc_result2, entries * sizeof(*tbl)); |
1207 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1208 | |
1209 | return retval; |
1210 | } |
1211 | #endif /* CONFIG_64BIT */ |
1212 | |
1213 | /* FIXME: Is this pdc used? I could not find type reference to ftc_bitmap |
1214 | * so I guessed at unsigned long. Someone who knows what this does, can fix |
1215 | * it later. :) |
1216 | */ |
1217 | int pdc_do_firm_test_reset(unsigned long ftc_bitmap) |
1218 | { |
1219 | int retval; |
1220 | unsigned long flags; |
1221 | |
1222 | spin_lock_irqsave(&pdc_lock, flags); |
1223 | retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_FIRM_TEST_RESET, |
1224 | PDC_FIRM_TEST_MAGIC, ftc_bitmap); |
1225 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1226 | |
1227 | return retval; |
1228 | } |
1229 | |
1230 | /* |
1231 | * pdc_do_reset - Reset the system. |
1232 | * |
1233 | * Reset the system. |
1234 | */ |
1235 | int pdc_do_reset(void) |
1236 | { |
1237 | int retval; |
1238 | unsigned long flags; |
1239 | |
1240 | spin_lock_irqsave(&pdc_lock, flags); |
1241 | retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_RESET); |
1242 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1243 | |
1244 | return retval; |
1245 | } |
1246 | |
1247 | /* |
1248 | * pdc_soft_power_info - Enable soft power switch. |
1249 | * @power_reg: address of soft power register |
1250 | * |
1251 | * Return the absolute address of the soft power switch register |
1252 | */ |
1253 | int __init pdc_soft_power_info(unsigned long *power_reg) |
1254 | { |
1255 | int retval; |
1256 | unsigned long flags; |
1257 | |
1258 | *power_reg = (unsigned long) (-1); |
1259 | |
1260 | spin_lock_irqsave(&pdc_lock, flags); |
1261 | retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_INFO, __pa(pdc_result), 0); |
1262 | if (retval == PDC_OK) { |
1263 | convert_to_wide(addr: pdc_result); |
1264 | *power_reg = f_extend(address: pdc_result[0]); |
1265 | } |
1266 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1267 | |
1268 | return retval; |
1269 | } |
1270 | |
1271 | /* |
1272 | * pdc_soft_power_button{_panic} - Control the soft power button behaviour |
1273 | * @sw_control: 0 for hardware control, 1 for software control |
1274 | * |
1275 | * |
1276 | * This PDC function places the soft power button under software or |
1277 | * hardware control. |
1278 | * Under software control the OS may control to when to allow to shut |
1279 | * down the system. Under hardware control pressing the power button |
1280 | * powers off the system immediately. |
1281 | * |
1282 | * The _panic version relies on spin_trylock to prevent deadlock |
1283 | * on panic path. |
1284 | */ |
1285 | int pdc_soft_power_button(int sw_control) |
1286 | { |
1287 | int retval; |
1288 | unsigned long flags; |
1289 | |
1290 | spin_lock_irqsave(&pdc_lock, flags); |
1291 | retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_ENABLE, __pa(pdc_result), sw_control); |
1292 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1293 | |
1294 | return retval; |
1295 | } |
1296 | |
1297 | int pdc_soft_power_button_panic(int sw_control) |
1298 | { |
1299 | int retval; |
1300 | unsigned long flags; |
1301 | |
1302 | if (!spin_trylock_irqsave(&pdc_lock, flags)) { |
1303 | pr_emerg("Couldn't enable soft power button\n" ); |
1304 | return -EBUSY; /* ignored by the panic notifier */ |
1305 | } |
1306 | |
1307 | retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_ENABLE, __pa(pdc_result), sw_control); |
1308 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1309 | |
1310 | return retval; |
1311 | } |
1312 | |
1313 | /* |
1314 | * pdc_io_reset - Hack to avoid overlapping range registers of Bridges devices. |
1315 | * Primarily a problem on T600 (which parisc-linux doesn't support) but |
1316 | * who knows what other platform firmware might do with this OS "hook". |
1317 | */ |
1318 | void pdc_io_reset(void) |
1319 | { |
1320 | unsigned long flags; |
1321 | |
1322 | spin_lock_irqsave(&pdc_lock, flags); |
1323 | mem_pdc_call(PDC_IO, PDC_IO_RESET, 0); |
1324 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1325 | } |
1326 | |
1327 | /* |
1328 | * pdc_io_reset_devices - Hack to Stop USB controller |
1329 | * |
1330 | * If PDC used the usb controller, the usb controller |
1331 | * is still running and will crash the machines during iommu |
1332 | * setup, because of still running DMA. This PDC call |
1333 | * stops the USB controller. |
1334 | * Normally called after calling pdc_io_reset(). |
1335 | */ |
1336 | void pdc_io_reset_devices(void) |
1337 | { |
1338 | unsigned long flags; |
1339 | |
1340 | spin_lock_irqsave(&pdc_lock, flags); |
1341 | mem_pdc_call(PDC_IO, PDC_IO_RESET_DEVICES, 0); |
1342 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1343 | } |
1344 | |
1345 | #endif /* defined(BOOTLOADER) */ |
1346 | |
1347 | /* locked by pdc_lock */ |
1348 | static char iodc_dbuf[4096] __page_aligned_bss; |
1349 | |
1350 | /** |
1351 | * pdc_iodc_print - Console print using IODC. |
1352 | * @str: the string to output. |
1353 | * @count: length of str |
1354 | * |
1355 | * Note that only these special chars are architected for console IODC io: |
1356 | * BEL, BS, CR, and LF. Others are passed through. |
1357 | * Since the HP console requires CR+LF to perform a 'newline', we translate |
1358 | * "\n" to "\r\n". |
1359 | */ |
1360 | int pdc_iodc_print(const unsigned char *str, unsigned count) |
1361 | { |
1362 | unsigned int i, found = 0; |
1363 | unsigned long flags; |
1364 | |
1365 | count = min_t(unsigned int, count, sizeof(iodc_dbuf)); |
1366 | |
1367 | spin_lock_irqsave(&pdc_lock, flags); |
1368 | for (i = 0; i < count;) { |
1369 | switch(str[i]) { |
1370 | case '\n': |
1371 | iodc_dbuf[i+0] = '\r'; |
1372 | iodc_dbuf[i+1] = '\n'; |
1373 | i += 2; |
1374 | found = 1; |
1375 | goto print; |
1376 | default: |
1377 | iodc_dbuf[i] = str[i]; |
1378 | i++; |
1379 | break; |
1380 | } |
1381 | } |
1382 | |
1383 | print: |
1384 | real32_call(PAGE0->mem_cons.iodc_io, |
1385 | (unsigned long)PAGE0->mem_cons.hpa, ENTRY_IO_COUT, |
1386 | PAGE0->mem_cons.spa, __pa(PAGE0->mem_cons.dp.layers), |
1387 | __pa(pdc_result), 0, __pa(iodc_dbuf), i, 0); |
1388 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1389 | |
1390 | return i - found; |
1391 | } |
1392 | |
1393 | #if !defined(BOOTLOADER) |
1394 | /** |
1395 | * pdc_iodc_getc - Read a character (non-blocking) from the PDC console. |
1396 | * |
1397 | * Read a character (non-blocking) from the PDC console, returns -1 if |
1398 | * key is not present. |
1399 | */ |
1400 | int pdc_iodc_getc(void) |
1401 | { |
1402 | int ch; |
1403 | int status; |
1404 | unsigned long flags; |
1405 | |
1406 | /* Bail if no console input device. */ |
1407 | if (!PAGE0->mem_kbd.iodc_io) |
1408 | return 0; |
1409 | |
1410 | /* wait for a keyboard (rs232)-input */ |
1411 | spin_lock_irqsave(&pdc_lock, flags); |
1412 | real32_call(PAGE0->mem_kbd.iodc_io, |
1413 | (unsigned long)PAGE0->mem_kbd.hpa, ENTRY_IO_CIN, |
1414 | PAGE0->mem_kbd.spa, __pa(PAGE0->mem_kbd.dp.layers), |
1415 | __pa(pdc_result), 0, __pa(iodc_dbuf), 1, 0); |
1416 | |
1417 | ch = *iodc_dbuf; |
1418 | /* like convert_to_wide() but for first return value only: */ |
1419 | status = *(int *)&pdc_result; |
1420 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1421 | |
1422 | if (status == 0) |
1423 | return -1; |
1424 | |
1425 | return ch; |
1426 | } |
1427 | |
1428 | int pdc_sti_call(unsigned long func, unsigned long flags, |
1429 | unsigned long inptr, unsigned long outputr, |
1430 | unsigned long glob_cfg, int do_call64) |
1431 | { |
1432 | int retval = 0; |
1433 | unsigned long irqflags; |
1434 | |
1435 | spin_lock_irqsave(&pdc_lock, irqflags); |
1436 | if (IS_ENABLED(CONFIG_64BIT) && do_call64) { |
1437 | #ifdef CONFIG_64BIT |
1438 | retval = real64_call(function: func, flags, inptr, outputr, glob_cfg); |
1439 | #else |
1440 | WARN_ON(1); |
1441 | #endif |
1442 | } else { |
1443 | retval = real32_call(function: func, flags, inptr, outputr, glob_cfg); |
1444 | } |
1445 | spin_unlock_irqrestore(lock: &pdc_lock, flags: irqflags); |
1446 | |
1447 | return retval; |
1448 | } |
1449 | EXPORT_SYMBOL(pdc_sti_call); |
1450 | |
1451 | #ifdef CONFIG_64BIT |
1452 | /** |
1453 | * pdc_pat_cell_get_number - Returns the cell number. |
1454 | * @cell_info: The return buffer. |
1455 | * |
1456 | * This PDC call returns the cell number of the cell from which the call |
1457 | * is made. |
1458 | */ |
1459 | int pdc_pat_cell_get_number(struct pdc_pat_cell_num *cell_info) |
1460 | { |
1461 | int retval; |
1462 | unsigned long flags; |
1463 | |
1464 | spin_lock_irqsave(&pdc_lock, flags); |
1465 | retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_GET_NUMBER, __pa(pdc_result)); |
1466 | memcpy(cell_info, pdc_result, sizeof(*cell_info)); |
1467 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1468 | |
1469 | return retval; |
1470 | } |
1471 | |
1472 | /** |
1473 | * pdc_pat_cell_module - Retrieve the cell's module information. |
1474 | * @actcnt: The number of bytes written to mem_addr. |
1475 | * @ploc: The physical location. |
1476 | * @mod: The module index. |
1477 | * @view_type: The view of the address type. |
1478 | * @mem_addr: The return buffer. |
1479 | * |
1480 | * This PDC call returns information about each module attached to the cell |
1481 | * at the specified location. |
1482 | */ |
1483 | int pdc_pat_cell_module(unsigned long *actcnt, unsigned long ploc, unsigned long mod, |
1484 | unsigned long view_type, void *mem_addr) |
1485 | { |
1486 | int retval; |
1487 | unsigned long flags; |
1488 | static struct pdc_pat_cell_mod_maddr_block result __attribute__ ((aligned (8))); |
1489 | |
1490 | spin_lock_irqsave(&pdc_lock, flags); |
1491 | retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_MODULE, __pa(pdc_result), |
1492 | ploc, mod, view_type, __pa(&result)); |
1493 | if(!retval) { |
1494 | *actcnt = pdc_result[0]; |
1495 | memcpy(mem_addr, &result, *actcnt); |
1496 | } |
1497 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1498 | |
1499 | return retval; |
1500 | } |
1501 | |
1502 | /** |
1503 | * pdc_pat_cell_info - Retrieve the cell's information. |
1504 | * @info: The pointer to a struct pdc_pat_cell_info_rtn_block. |
1505 | * @actcnt: The number of bytes which should be written to info. |
1506 | * @offset: offset of the structure. |
1507 | * @cell_number: The cell number which should be asked, or -1 for current cell. |
1508 | * |
1509 | * This PDC call returns information about the given cell (or all cells). |
1510 | */ |
1511 | int pdc_pat_cell_info(struct pdc_pat_cell_info_rtn_block *info, |
1512 | unsigned long *actcnt, unsigned long offset, |
1513 | unsigned long cell_number) |
1514 | { |
1515 | int retval; |
1516 | unsigned long flags; |
1517 | struct pdc_pat_cell_info_rtn_block result; |
1518 | |
1519 | spin_lock_irqsave(&pdc_lock, flags); |
1520 | retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_GET_INFO, |
1521 | __pa(pdc_result), __pa(&result), *actcnt, |
1522 | offset, cell_number); |
1523 | if (!retval) { |
1524 | *actcnt = pdc_result[0]; |
1525 | memcpy(info, &result, *actcnt); |
1526 | } |
1527 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1528 | |
1529 | return retval; |
1530 | } |
1531 | |
1532 | /** |
1533 | * pdc_pat_cpu_get_number - Retrieve the cpu number. |
1534 | * @cpu_info: The return buffer. |
1535 | * @hpa: The Hard Physical Address of the CPU. |
1536 | * |
1537 | * Retrieve the cpu number for the cpu at the specified HPA. |
1538 | */ |
1539 | int pdc_pat_cpu_get_number(struct pdc_pat_cpu_num *cpu_info, unsigned long hpa) |
1540 | { |
1541 | int retval; |
1542 | unsigned long flags; |
1543 | |
1544 | spin_lock_irqsave(&pdc_lock, flags); |
1545 | retval = mem_pdc_call(PDC_PAT_CPU, PDC_PAT_CPU_GET_NUMBER, |
1546 | __pa(&pdc_result), hpa); |
1547 | memcpy(cpu_info, pdc_result, sizeof(*cpu_info)); |
1548 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1549 | |
1550 | return retval; |
1551 | } |
1552 | |
1553 | /** |
1554 | * pdc_pat_get_irt_size - Retrieve the number of entries in the cell's interrupt table. |
1555 | * @num_entries: The return value. |
1556 | * @cell_num: The target cell. |
1557 | * |
1558 | * This PDC function returns the number of entries in the specified cell's |
1559 | * interrupt table. |
1560 | */ |
1561 | int pdc_pat_get_irt_size(unsigned long *num_entries, unsigned long cell_num) |
1562 | { |
1563 | int retval; |
1564 | unsigned long flags; |
1565 | |
1566 | spin_lock_irqsave(&pdc_lock, flags); |
1567 | retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE_SIZE, |
1568 | __pa(pdc_result), cell_num); |
1569 | *num_entries = pdc_result[0]; |
1570 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1571 | |
1572 | return retval; |
1573 | } |
1574 | |
1575 | /** |
1576 | * pdc_pat_get_irt - Retrieve the cell's interrupt table. |
1577 | * @r_addr: The return buffer. |
1578 | * @cell_num: The target cell. |
1579 | * |
1580 | * This PDC function returns the actual interrupt table for the specified cell. |
1581 | */ |
1582 | int pdc_pat_get_irt(void *r_addr, unsigned long cell_num) |
1583 | { |
1584 | int retval; |
1585 | unsigned long flags; |
1586 | |
1587 | spin_lock_irqsave(&pdc_lock, flags); |
1588 | retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE, |
1589 | __pa(r_addr), cell_num); |
1590 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1591 | |
1592 | return retval; |
1593 | } |
1594 | |
1595 | /** |
1596 | * pdc_pat_pd_get_addr_map - Retrieve information about memory address ranges. |
1597 | * @actual_len: The return buffer. |
1598 | * @mem_addr: Pointer to the memory buffer. |
1599 | * @count: The number of bytes to read from the buffer. |
1600 | * @offset: The offset with respect to the beginning of the buffer. |
1601 | * |
1602 | */ |
1603 | int pdc_pat_pd_get_addr_map(unsigned long *actual_len, void *mem_addr, |
1604 | unsigned long count, unsigned long offset) |
1605 | { |
1606 | int retval; |
1607 | unsigned long flags; |
1608 | |
1609 | spin_lock_irqsave(&pdc_lock, flags); |
1610 | retval = mem_pdc_call(PDC_PAT_PD, PDC_PAT_PD_GET_ADDR_MAP, __pa(pdc_result), |
1611 | __pa(pdc_result2), count, offset); |
1612 | *actual_len = pdc_result[0]; |
1613 | memcpy(mem_addr, pdc_result2, *actual_len); |
1614 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1615 | |
1616 | return retval; |
1617 | } |
1618 | |
1619 | /** |
1620 | * pdc_pat_pd_get_pdc_revisions - Retrieve PDC interface revisions. |
1621 | * @legacy_rev: The legacy revision. |
1622 | * @pat_rev: The PAT revision. |
1623 | * @pdc_cap: The PDC capabilities. |
1624 | * |
1625 | */ |
1626 | int pdc_pat_pd_get_pdc_revisions(unsigned long *legacy_rev, |
1627 | unsigned long *pat_rev, unsigned long *pdc_cap) |
1628 | { |
1629 | int retval; |
1630 | unsigned long flags; |
1631 | |
1632 | spin_lock_irqsave(&pdc_lock, flags); |
1633 | retval = mem_pdc_call(PDC_PAT_PD, PDC_PAT_PD_GET_PDC_INTERF_REV, |
1634 | __pa(pdc_result)); |
1635 | if (retval == PDC_OK) { |
1636 | *legacy_rev = pdc_result[0]; |
1637 | *pat_rev = pdc_result[1]; |
1638 | *pdc_cap = pdc_result[2]; |
1639 | } |
1640 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1641 | |
1642 | return retval; |
1643 | } |
1644 | |
1645 | |
1646 | /** |
1647 | * pdc_pat_io_pci_cfg_read - Read PCI configuration space. |
1648 | * @pci_addr: PCI configuration space address for which the read request is being made. |
1649 | * @pci_size: Size of read in bytes. Valid values are 1, 2, and 4. |
1650 | * @mem_addr: Pointer to return memory buffer. |
1651 | * |
1652 | */ |
1653 | int pdc_pat_io_pci_cfg_read(unsigned long pci_addr, int pci_size, u32 *mem_addr) |
1654 | { |
1655 | int retval; |
1656 | unsigned long flags; |
1657 | |
1658 | spin_lock_irqsave(&pdc_lock, flags); |
1659 | retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_READ, |
1660 | __pa(pdc_result), pci_addr, pci_size); |
1661 | switch(pci_size) { |
1662 | case 1: *(u8 *) mem_addr = (u8) pdc_result[0]; break; |
1663 | case 2: *(u16 *)mem_addr = (u16) pdc_result[0]; break; |
1664 | case 4: *(u32 *)mem_addr = (u32) pdc_result[0]; break; |
1665 | } |
1666 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1667 | |
1668 | return retval; |
1669 | } |
1670 | |
1671 | /** |
1672 | * pdc_pat_io_pci_cfg_write - Retrieve information about memory address ranges. |
1673 | * @pci_addr: PCI configuration space address for which the write request is being made. |
1674 | * @pci_size: Size of write in bytes. Valid values are 1, 2, and 4. |
1675 | * @val: Pointer to 1, 2, or 4 byte value in low order end of argument to be |
1676 | * written to PCI Config space. |
1677 | * |
1678 | */ |
1679 | int pdc_pat_io_pci_cfg_write(unsigned long pci_addr, int pci_size, u32 val) |
1680 | { |
1681 | int retval; |
1682 | unsigned long flags; |
1683 | |
1684 | spin_lock_irqsave(&pdc_lock, flags); |
1685 | retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_WRITE, |
1686 | pci_addr, pci_size, val); |
1687 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1688 | |
1689 | return retval; |
1690 | } |
1691 | |
1692 | /** |
1693 | * pdc_pat_mem_pdt_info - Retrieve information about page deallocation table |
1694 | * @rinfo: memory pdt information |
1695 | * |
1696 | */ |
1697 | int pdc_pat_mem_pdt_info(struct pdc_pat_mem_retinfo *rinfo) |
1698 | { |
1699 | int retval; |
1700 | unsigned long flags; |
1701 | |
1702 | spin_lock_irqsave(&pdc_lock, flags); |
1703 | retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_PD_INFO, |
1704 | __pa(&pdc_result)); |
1705 | if (retval == PDC_OK) |
1706 | memcpy(rinfo, &pdc_result, sizeof(*rinfo)); |
1707 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1708 | |
1709 | return retval; |
1710 | } |
1711 | |
1712 | /** |
1713 | * pdc_pat_mem_pdt_cell_info - Retrieve information about page deallocation |
1714 | * table of a cell |
1715 | * @rinfo: memory pdt information |
1716 | * @cell: cell number |
1717 | * |
1718 | */ |
1719 | int pdc_pat_mem_pdt_cell_info(struct pdc_pat_mem_cell_pdt_retinfo *rinfo, |
1720 | unsigned long cell) |
1721 | { |
1722 | int retval; |
1723 | unsigned long flags; |
1724 | |
1725 | spin_lock_irqsave(&pdc_lock, flags); |
1726 | retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_CELL_INFO, |
1727 | __pa(&pdc_result), cell); |
1728 | if (retval == PDC_OK) |
1729 | memcpy(rinfo, &pdc_result, sizeof(*rinfo)); |
1730 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1731 | |
1732 | return retval; |
1733 | } |
1734 | |
1735 | /** |
1736 | * pdc_pat_mem_read_cell_pdt - Read PDT entries from (old) PAT firmware |
1737 | * @pret: array of PDT entries |
1738 | * @pdt_entries_ptr: ptr to hold number of PDT entries |
1739 | * @max_entries: maximum number of entries to be read |
1740 | * |
1741 | */ |
1742 | int pdc_pat_mem_read_cell_pdt(struct pdc_pat_mem_read_pd_retinfo *pret, |
1743 | unsigned long *pdt_entries_ptr, unsigned long max_entries) |
1744 | { |
1745 | int retval; |
1746 | unsigned long flags, entries; |
1747 | |
1748 | spin_lock_irqsave(&pdc_lock, flags); |
1749 | /* PDC_PAT_MEM_CELL_READ is available on early PAT machines only */ |
1750 | retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_CELL_READ, |
1751 | __pa(&pdc_result), parisc_cell_num, |
1752 | __pa(pdt_entries_ptr)); |
1753 | |
1754 | if (retval == PDC_OK) { |
1755 | /* build up return value as for PDC_PAT_MEM_PD_READ */ |
1756 | entries = min(pdc_result[0], max_entries); |
1757 | pret->pdt_entries = entries; |
1758 | pret->actual_count_bytes = entries * sizeof(unsigned long); |
1759 | } |
1760 | |
1761 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1762 | WARN_ON(retval == PDC_OK && pdc_result[0] > max_entries); |
1763 | |
1764 | return retval; |
1765 | } |
1766 | /** |
1767 | * pdc_pat_mem_read_pd_pdt - Read PDT entries from (newer) PAT firmware |
1768 | * @pret: array of PDT entries |
1769 | * @pdt_entries_ptr: ptr to hold number of PDT entries |
1770 | * @count: number of bytes to read |
1771 | * @offset: offset to start (in bytes) |
1772 | * |
1773 | */ |
1774 | int pdc_pat_mem_read_pd_pdt(struct pdc_pat_mem_read_pd_retinfo *pret, |
1775 | unsigned long *pdt_entries_ptr, unsigned long count, |
1776 | unsigned long offset) |
1777 | { |
1778 | int retval; |
1779 | unsigned long flags, entries; |
1780 | |
1781 | spin_lock_irqsave(&pdc_lock, flags); |
1782 | retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_PD_READ, |
1783 | __pa(&pdc_result), __pa(pdt_entries_ptr), |
1784 | count, offset); |
1785 | |
1786 | if (retval == PDC_OK) { |
1787 | entries = min(pdc_result[0], count); |
1788 | pret->actual_count_bytes = entries; |
1789 | pret->pdt_entries = entries / sizeof(unsigned long); |
1790 | } |
1791 | |
1792 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1793 | |
1794 | return retval; |
1795 | } |
1796 | |
1797 | /** |
1798 | * pdc_pat_mem_get_dimm_phys_location - Get physical DIMM slot via PAT firmware |
1799 | * @pret: ptr to hold returned information |
1800 | * @phys_addr: physical address to examine |
1801 | * |
1802 | */ |
1803 | int pdc_pat_mem_get_dimm_phys_location( |
1804 | struct pdc_pat_mem_phys_mem_location *pret, |
1805 | unsigned long phys_addr) |
1806 | { |
1807 | int retval; |
1808 | unsigned long flags; |
1809 | |
1810 | spin_lock_irqsave(&pdc_lock, flags); |
1811 | retval = mem_pdc_call(PDC_PAT_MEM, PDC_PAT_MEM_ADDRESS, |
1812 | __pa(&pdc_result), phys_addr); |
1813 | |
1814 | if (retval == PDC_OK) |
1815 | memcpy(pret, &pdc_result, sizeof(*pret)); |
1816 | |
1817 | spin_unlock_irqrestore(lock: &pdc_lock, flags); |
1818 | |
1819 | return retval; |
1820 | } |
1821 | #endif /* CONFIG_64BIT */ |
1822 | #endif /* defined(BOOTLOADER) */ |
1823 | |
1824 | |
1825 | /***************** 32-bit real-mode calls ***********/ |
1826 | /* The struct below is used |
1827 | * to overlay real_stack (real2.S), preparing a 32-bit call frame. |
1828 | * real32_call_asm() then uses this stack in narrow real mode |
1829 | */ |
1830 | |
1831 | struct narrow_stack { |
1832 | /* use int, not long which is 64 bits */ |
1833 | unsigned int arg13; |
1834 | unsigned int arg12; |
1835 | unsigned int arg11; |
1836 | unsigned int arg10; |
1837 | unsigned int arg9; |
1838 | unsigned int arg8; |
1839 | unsigned int arg7; |
1840 | unsigned int arg6; |
1841 | unsigned int arg5; |
1842 | unsigned int arg4; |
1843 | unsigned int arg3; |
1844 | unsigned int arg2; |
1845 | unsigned int arg1; |
1846 | unsigned int arg0; |
1847 | unsigned int frame_marker[8]; |
1848 | unsigned int sp; |
1849 | /* in reality, there's nearly 8k of stack after this */ |
1850 | }; |
1851 | |
1852 | long real32_call(unsigned long fn, ...) |
1853 | { |
1854 | va_list args; |
1855 | extern struct narrow_stack real_stack; |
1856 | extern unsigned long real32_call_asm(unsigned int *, |
1857 | unsigned int *, |
1858 | unsigned int); |
1859 | |
1860 | va_start(args, fn); |
1861 | real_stack.arg0 = va_arg(args, unsigned int); |
1862 | real_stack.arg1 = va_arg(args, unsigned int); |
1863 | real_stack.arg2 = va_arg(args, unsigned int); |
1864 | real_stack.arg3 = va_arg(args, unsigned int); |
1865 | real_stack.arg4 = va_arg(args, unsigned int); |
1866 | real_stack.arg5 = va_arg(args, unsigned int); |
1867 | real_stack.arg6 = va_arg(args, unsigned int); |
1868 | real_stack.arg7 = va_arg(args, unsigned int); |
1869 | real_stack.arg8 = va_arg(args, unsigned int); |
1870 | real_stack.arg9 = va_arg(args, unsigned int); |
1871 | real_stack.arg10 = va_arg(args, unsigned int); |
1872 | real_stack.arg11 = va_arg(args, unsigned int); |
1873 | real_stack.arg12 = va_arg(args, unsigned int); |
1874 | real_stack.arg13 = va_arg(args, unsigned int); |
1875 | va_end(args); |
1876 | |
1877 | return real32_call_asm(&real_stack.sp, &real_stack.arg0, fn); |
1878 | } |
1879 | |
1880 | #ifdef CONFIG_64BIT |
1881 | /***************** 64-bit real-mode calls ***********/ |
1882 | |
1883 | struct wide_stack { |
1884 | unsigned long arg0; |
1885 | unsigned long arg1; |
1886 | unsigned long arg2; |
1887 | unsigned long arg3; |
1888 | unsigned long arg4; |
1889 | unsigned long arg5; |
1890 | unsigned long arg6; |
1891 | unsigned long arg7; |
1892 | unsigned long arg8; |
1893 | unsigned long arg9; |
1894 | unsigned long arg10; |
1895 | unsigned long arg11; |
1896 | unsigned long arg12; |
1897 | unsigned long arg13; |
1898 | unsigned long frame_marker[2]; /* rp, previous sp */ |
1899 | unsigned long sp; |
1900 | /* in reality, there's nearly 8k of stack after this */ |
1901 | }; |
1902 | |
1903 | long real64_call(unsigned long fn, ...) |
1904 | { |
1905 | va_list args; |
1906 | extern struct wide_stack real64_stack; |
1907 | extern unsigned long real64_call_asm(unsigned long *, |
1908 | unsigned long *, |
1909 | unsigned long); |
1910 | |
1911 | va_start(args, fn); |
1912 | real64_stack.arg0 = va_arg(args, unsigned long); |
1913 | real64_stack.arg1 = va_arg(args, unsigned long); |
1914 | real64_stack.arg2 = va_arg(args, unsigned long); |
1915 | real64_stack.arg3 = va_arg(args, unsigned long); |
1916 | real64_stack.arg4 = va_arg(args, unsigned long); |
1917 | real64_stack.arg5 = va_arg(args, unsigned long); |
1918 | real64_stack.arg6 = va_arg(args, unsigned long); |
1919 | real64_stack.arg7 = va_arg(args, unsigned long); |
1920 | real64_stack.arg8 = va_arg(args, unsigned long); |
1921 | real64_stack.arg9 = va_arg(args, unsigned long); |
1922 | real64_stack.arg10 = va_arg(args, unsigned long); |
1923 | real64_stack.arg11 = va_arg(args, unsigned long); |
1924 | real64_stack.arg12 = va_arg(args, unsigned long); |
1925 | real64_stack.arg13 = va_arg(args, unsigned long); |
1926 | va_end(args); |
1927 | |
1928 | return real64_call_asm(&real64_stack.sp, &real64_stack.arg0, fn); |
1929 | } |
1930 | |
1931 | #endif /* CONFIG_64BIT */ |
1932 | |