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1da177e4 LT |
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> | |
8ffaeaf4 | 14 | * Copyright 2004,2006 Thibaut VARENE <varenet@parisc-linux.org> |
1da177e4 LT |
15 | * |
16 | * This program is free software; you can redistribute it and/or modify | |
17 | * it under the terms of the GNU General Public License as published by | |
18 | * the Free Software Foundation; either version 2 of the License, or | |
19 | * (at your option) any later version. | |
20 | * | |
21 | */ | |
22 | ||
23 | /* I think it would be in everyone's best interest to follow this | |
24 | * guidelines when writing PDC wrappers: | |
25 | * | |
26 | * - the name of the pdc wrapper should match one of the macros | |
27 | * used for the first two arguments | |
28 | * - don't use caps for random parts of the name | |
29 | * - use the static PDC result buffers and "copyout" to structs | |
30 | * supplied by the caller to encapsulate alignment restrictions | |
31 | * - hold pdc_lock while in PDC or using static result buffers | |
32 | * - use __pa() to convert virtual (kernel) pointers to physical | |
33 | * ones. | |
34 | * - the name of the struct used for pdc return values should equal | |
35 | * one of the macros used for the first two arguments to the | |
36 | * corresponding PDC call | |
37 | * - keep the order of arguments | |
38 | * - don't be smart (setting trailing NUL bytes for strings, return | |
39 | * something useful even if the call failed) unless you are sure | |
40 | * it's not going to affect functionality or performance | |
41 | * | |
42 | * Example: | |
43 | * int pdc_cache_info(struct pdc_cache_info *cache_info ) | |
44 | * { | |
45 | * int retval; | |
46 | * | |
47 | * spin_lock_irq(&pdc_lock); | |
48 | * retval = mem_pdc_call(PDC_CACHE,PDC_CACHE_INFO,__pa(cache_info),0); | |
49 | * convert_to_wide(pdc_result); | |
50 | * memcpy(cache_info, pdc_result, sizeof(*cache_info)); | |
51 | * spin_unlock_irq(&pdc_lock); | |
52 | * | |
53 | * return retval; | |
54 | * } | |
55 | * prumpf 991016 | |
56 | */ | |
57 | ||
58 | #include <stdarg.h> | |
59 | ||
60 | #include <linux/delay.h> | |
61 | #include <linux/init.h> | |
62 | #include <linux/kernel.h> | |
63 | #include <linux/module.h> | |
64 | #include <linux/string.h> | |
65 | #include <linux/spinlock.h> | |
66 | ||
67 | #include <asm/page.h> | |
68 | #include <asm/pdc.h> | |
69 | #include <asm/pdcpat.h> | |
70 | #include <asm/system.h> | |
71 | #include <asm/processor.h> /* for boot_cpu_data */ | |
72 | ||
73 | static DEFINE_SPINLOCK(pdc_lock); | |
74 | static unsigned long pdc_result[32] __attribute__ ((aligned (8))); | |
75 | static unsigned long pdc_result2[32] __attribute__ ((aligned (8))); | |
76 | ||
77 | #ifdef __LP64__ | |
78 | #define WIDE_FIRMWARE 0x1 | |
79 | #define NARROW_FIRMWARE 0x2 | |
80 | ||
81 | /* Firmware needs to be initially set to narrow to determine the | |
82 | * actual firmware width. */ | |
8039de10 | 83 | int parisc_narrow_firmware __read_mostly = 1; |
1da177e4 LT |
84 | #endif |
85 | ||
675ec7a5 GG |
86 | /* On most currently-supported platforms, IODC I/O calls are 32-bit calls |
87 | * and MEM_PDC calls are always the same width as the OS. | |
88 | * Some PAT boxes may have 64-bit IODC I/O. | |
1da177e4 | 89 | * |
675ec7a5 GG |
90 | * Ryan Bradetich added the now obsolete CONFIG_PDC_NARROW to allow |
91 | * 64-bit kernels to run on systems with 32-bit MEM_PDC calls. | |
92 | * This allowed wide kernels to run on Cxxx boxes. | |
93 | * We now detect 32-bit-only PDC and dynamically switch to 32-bit mode | |
94 | * when running a 64-bit kernel on such boxes (e.g. C200 or C360). | |
1da177e4 LT |
95 | */ |
96 | ||
97 | #ifdef __LP64__ | |
98 | long real64_call(unsigned long function, ...); | |
99 | #endif | |
100 | long real32_call(unsigned long function, ...); | |
101 | ||
102 | #ifdef __LP64__ | |
103 | # define MEM_PDC (unsigned long)(PAGE0->mem_pdc_hi) << 32 | PAGE0->mem_pdc | |
104 | # define mem_pdc_call(args...) unlikely(parisc_narrow_firmware) ? real32_call(MEM_PDC, args) : real64_call(MEM_PDC, args) | |
105 | #else | |
106 | # define MEM_PDC (unsigned long)PAGE0->mem_pdc | |
107 | # define mem_pdc_call(args...) real32_call(MEM_PDC, args) | |
108 | #endif | |
109 | ||
110 | ||
111 | /** | |
112 | * f_extend - Convert PDC addresses to kernel addresses. | |
113 | * @address: Address returned from PDC. | |
114 | * | |
115 | * This function is used to convert PDC addresses into kernel addresses | |
116 | * when the PDC address size and kernel address size are different. | |
117 | */ | |
118 | static unsigned long f_extend(unsigned long address) | |
119 | { | |
120 | #ifdef __LP64__ | |
121 | if(unlikely(parisc_narrow_firmware)) { | |
122 | if((address & 0xff000000) == 0xf0000000) | |
123 | return 0xf0f0f0f000000000UL | (u32)address; | |
124 | ||
125 | if((address & 0xf0000000) == 0xf0000000) | |
126 | return 0xffffffff00000000UL | (u32)address; | |
127 | } | |
128 | #endif | |
129 | return address; | |
130 | } | |
131 | ||
132 | /** | |
133 | * convert_to_wide - Convert the return buffer addresses into kernel addresses. | |
134 | * @address: The return buffer from PDC. | |
135 | * | |
136 | * This function is used to convert the return buffer addresses retrieved from PDC | |
137 | * into kernel addresses when the PDC address size and kernel address size are | |
138 | * different. | |
139 | */ | |
140 | static void convert_to_wide(unsigned long *addr) | |
141 | { | |
142 | #ifdef __LP64__ | |
143 | int i; | |
144 | unsigned int *p = (unsigned int *)addr; | |
145 | ||
146 | if(unlikely(parisc_narrow_firmware)) { | |
147 | for(i = 31; i >= 0; --i) | |
148 | addr[i] = p[i]; | |
149 | } | |
150 | #endif | |
151 | } | |
152 | ||
153 | /** | |
154 | * set_firmware_width - Determine if the firmware is wide or narrow. | |
155 | * | |
156 | * This function must be called before any pdc_* function that uses the convert_to_wide | |
157 | * function. | |
158 | */ | |
159 | void __init set_firmware_width(void) | |
160 | { | |
161 | #ifdef __LP64__ | |
162 | int retval; | |
163 | ||
164 | spin_lock_irq(&pdc_lock); | |
165 | retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES, __pa(pdc_result), 0); | |
166 | convert_to_wide(pdc_result); | |
167 | if(pdc_result[0] != NARROW_FIRMWARE) | |
168 | parisc_narrow_firmware = 0; | |
169 | spin_unlock_irq(&pdc_lock); | |
170 | #endif | |
171 | } | |
172 | ||
173 | /** | |
174 | * pdc_emergency_unlock - Unlock the linux pdc lock | |
175 | * | |
176 | * This call unlocks the linux pdc lock in case we need some PDC functions | |
177 | * (like pdc_add_valid) during kernel stack dump. | |
178 | */ | |
179 | void pdc_emergency_unlock(void) | |
180 | { | |
181 | /* Spinlock DEBUG code freaks out if we unconditionally unlock */ | |
182 | if (spin_is_locked(&pdc_lock)) | |
183 | spin_unlock(&pdc_lock); | |
184 | } | |
185 | ||
186 | ||
187 | /** | |
188 | * pdc_add_valid - Verify address can be accessed without causing a HPMC. | |
189 | * @address: Address to be verified. | |
190 | * | |
191 | * This PDC call attempts to read from the specified address and verifies | |
192 | * if the address is valid. | |
193 | * | |
194 | * The return value is PDC_OK (0) in case accessing this address is valid. | |
195 | */ | |
196 | int pdc_add_valid(unsigned long address) | |
197 | { | |
198 | int retval; | |
199 | ||
200 | spin_lock_irq(&pdc_lock); | |
201 | retval = mem_pdc_call(PDC_ADD_VALID, PDC_ADD_VALID_VERIFY, address); | |
202 | spin_unlock_irq(&pdc_lock); | |
203 | ||
204 | return retval; | |
205 | } | |
206 | EXPORT_SYMBOL(pdc_add_valid); | |
207 | ||
208 | /** | |
209 | * pdc_chassis_info - Return chassis information. | |
210 | * @result: The return buffer. | |
211 | * @chassis_info: The memory buffer address. | |
212 | * @len: The size of the memory buffer address. | |
213 | * | |
214 | * An HVERSION dependent call for returning the chassis information. | |
215 | */ | |
216 | int __init pdc_chassis_info(struct pdc_chassis_info *chassis_info, void *led_info, unsigned long len) | |
217 | { | |
218 | int retval; | |
219 | ||
220 | spin_lock_irq(&pdc_lock); | |
221 | memcpy(&pdc_result, chassis_info, sizeof(*chassis_info)); | |
222 | memcpy(&pdc_result2, led_info, len); | |
223 | retval = mem_pdc_call(PDC_CHASSIS, PDC_RETURN_CHASSIS_INFO, | |
224 | __pa(pdc_result), __pa(pdc_result2), len); | |
225 | memcpy(chassis_info, pdc_result, sizeof(*chassis_info)); | |
226 | memcpy(led_info, pdc_result2, len); | |
227 | spin_unlock_irq(&pdc_lock); | |
228 | ||
229 | return retval; | |
230 | } | |
231 | ||
232 | /** | |
233 | * pdc_pat_chassis_send_log - Sends a PDC PAT CHASSIS log message. | |
234 | * @retval: -1 on error, 0 on success. Other value are PDC errors | |
235 | * | |
236 | * Must be correctly formatted or expect system crash | |
237 | */ | |
238 | #ifdef __LP64__ | |
239 | int pdc_pat_chassis_send_log(unsigned long state, unsigned long data) | |
240 | { | |
241 | int retval = 0; | |
242 | ||
243 | if (!is_pdc_pat()) | |
244 | return -1; | |
245 | ||
246 | spin_lock_irq(&pdc_lock); | |
247 | retval = mem_pdc_call(PDC_PAT_CHASSIS_LOG, PDC_PAT_CHASSIS_WRITE_LOG, __pa(&state), __pa(&data)); | |
248 | spin_unlock_irq(&pdc_lock); | |
249 | ||
250 | return retval; | |
251 | } | |
252 | #endif | |
253 | ||
254 | /** | |
8ffaeaf4 | 255 | * pdc_chassis_disp - Updates chassis code |
1da177e4 | 256 | * @retval: -1 on error, 0 on success |
1da177e4 LT |
257 | */ |
258 | int pdc_chassis_disp(unsigned long disp) | |
259 | { | |
260 | int retval = 0; | |
261 | ||
262 | spin_lock_irq(&pdc_lock); | |
263 | retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_DISP, disp); | |
264 | spin_unlock_irq(&pdc_lock); | |
265 | ||
266 | return retval; | |
267 | } | |
268 | ||
8ffaeaf4 TV |
269 | /** |
270 | * pdc_chassis_warn - Fetches chassis warnings | |
271 | * @retval: -1 on error, 0 on success | |
272 | */ | |
273 | int pdc_chassis_warn(unsigned long *warn) | |
274 | { | |
275 | int retval = 0; | |
276 | ||
277 | spin_lock_irq(&pdc_lock); | |
278 | retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_WARN, __pa(pdc_result)); | |
279 | *warn = pdc_result[0]; | |
280 | spin_unlock_irq(&pdc_lock); | |
281 | ||
282 | return retval; | |
283 | } | |
284 | ||
1da177e4 LT |
285 | /** |
286 | * pdc_coproc_cfg - To identify coprocessors attached to the processor. | |
287 | * @pdc_coproc_info: Return buffer address. | |
288 | * | |
289 | * This PDC call returns the presence and status of all the coprocessors | |
290 | * attached to the processor. | |
291 | */ | |
292 | int __init pdc_coproc_cfg(struct pdc_coproc_cfg *pdc_coproc_info) | |
293 | { | |
294 | int retval; | |
295 | ||
296 | spin_lock_irq(&pdc_lock); | |
297 | retval = mem_pdc_call(PDC_COPROC, PDC_COPROC_CFG, __pa(pdc_result)); | |
298 | convert_to_wide(pdc_result); | |
299 | pdc_coproc_info->ccr_functional = pdc_result[0]; | |
300 | pdc_coproc_info->ccr_present = pdc_result[1]; | |
301 | pdc_coproc_info->revision = pdc_result[17]; | |
302 | pdc_coproc_info->model = pdc_result[18]; | |
303 | spin_unlock_irq(&pdc_lock); | |
304 | ||
305 | return retval; | |
306 | } | |
307 | ||
308 | /** | |
309 | * pdc_iodc_read - Read data from the modules IODC. | |
310 | * @actcnt: The actual number of bytes. | |
311 | * @hpa: The HPA of the module for the iodc read. | |
312 | * @index: The iodc entry point. | |
313 | * @iodc_data: A buffer memory for the iodc options. | |
314 | * @iodc_data_size: Size of the memory buffer. | |
315 | * | |
316 | * This PDC call reads from the IODC of the module specified by the hpa | |
317 | * argument. | |
318 | */ | |
319 | int pdc_iodc_read(unsigned long *actcnt, unsigned long hpa, unsigned int index, | |
320 | void *iodc_data, unsigned int iodc_data_size) | |
321 | { | |
322 | int retval; | |
323 | ||
324 | spin_lock_irq(&pdc_lock); | |
325 | retval = mem_pdc_call(PDC_IODC, PDC_IODC_READ, __pa(pdc_result), hpa, | |
326 | index, __pa(pdc_result2), iodc_data_size); | |
327 | convert_to_wide(pdc_result); | |
328 | *actcnt = pdc_result[0]; | |
329 | memcpy(iodc_data, pdc_result2, iodc_data_size); | |
330 | spin_unlock_irq(&pdc_lock); | |
331 | ||
332 | return retval; | |
333 | } | |
334 | EXPORT_SYMBOL(pdc_iodc_read); | |
335 | ||
336 | /** | |
337 | * pdc_system_map_find_mods - Locate unarchitected modules. | |
338 | * @pdc_mod_info: Return buffer address. | |
339 | * @mod_path: pointer to dev path structure. | |
340 | * @mod_index: fixed address module index. | |
341 | * | |
342 | * To locate and identify modules which reside at fixed I/O addresses, which | |
343 | * do not self-identify via architected bus walks. | |
344 | */ | |
345 | int pdc_system_map_find_mods(struct pdc_system_map_mod_info *pdc_mod_info, | |
346 | struct pdc_module_path *mod_path, long mod_index) | |
347 | { | |
348 | int retval; | |
349 | ||
350 | spin_lock_irq(&pdc_lock); | |
351 | retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_MODULE, __pa(pdc_result), | |
352 | __pa(pdc_result2), mod_index); | |
353 | convert_to_wide(pdc_result); | |
354 | memcpy(pdc_mod_info, pdc_result, sizeof(*pdc_mod_info)); | |
355 | memcpy(mod_path, pdc_result2, sizeof(*mod_path)); | |
356 | spin_unlock_irq(&pdc_lock); | |
357 | ||
358 | pdc_mod_info->mod_addr = f_extend(pdc_mod_info->mod_addr); | |
359 | return retval; | |
360 | } | |
361 | ||
362 | /** | |
363 | * pdc_system_map_find_addrs - Retrieve additional address ranges. | |
364 | * @pdc_addr_info: Return buffer address. | |
365 | * @mod_index: Fixed address module index. | |
366 | * @addr_index: Address range index. | |
367 | * | |
368 | * Retrieve additional information about subsequent address ranges for modules | |
369 | * with multiple address ranges. | |
370 | */ | |
371 | int pdc_system_map_find_addrs(struct pdc_system_map_addr_info *pdc_addr_info, | |
372 | long mod_index, long addr_index) | |
373 | { | |
374 | int retval; | |
375 | ||
376 | spin_lock_irq(&pdc_lock); | |
377 | retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_ADDRESS, __pa(pdc_result), | |
378 | mod_index, addr_index); | |
379 | convert_to_wide(pdc_result); | |
380 | memcpy(pdc_addr_info, pdc_result, sizeof(*pdc_addr_info)); | |
381 | spin_unlock_irq(&pdc_lock); | |
382 | ||
383 | pdc_addr_info->mod_addr = f_extend(pdc_addr_info->mod_addr); | |
384 | return retval; | |
385 | } | |
386 | ||
387 | /** | |
388 | * pdc_model_info - Return model information about the processor. | |
389 | * @model: The return buffer. | |
390 | * | |
391 | * Returns the version numbers, identifiers, and capabilities from the processor module. | |
392 | */ | |
393 | int pdc_model_info(struct pdc_model *model) | |
394 | { | |
395 | int retval; | |
396 | ||
397 | spin_lock_irq(&pdc_lock); | |
398 | retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_INFO, __pa(pdc_result), 0); | |
399 | convert_to_wide(pdc_result); | |
400 | memcpy(model, pdc_result, sizeof(*model)); | |
401 | spin_unlock_irq(&pdc_lock); | |
402 | ||
403 | return retval; | |
404 | } | |
405 | ||
406 | /** | |
407 | * pdc_model_sysmodel - Get the system model name. | |
408 | * @name: A char array of at least 81 characters. | |
409 | * | |
ec1fdc24 KM |
410 | * Get system model name from PDC ROM (e.g. 9000/715 or 9000/778/B160L). |
411 | * Using OS_ID_HPUX will return the equivalent of the 'modelname' command | |
412 | * on HP/UX. | |
1da177e4 LT |
413 | */ |
414 | int pdc_model_sysmodel(char *name) | |
415 | { | |
416 | int retval; | |
417 | ||
418 | spin_lock_irq(&pdc_lock); | |
419 | retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_SYSMODEL, __pa(pdc_result), | |
420 | OS_ID_HPUX, __pa(name)); | |
421 | convert_to_wide(pdc_result); | |
422 | ||
423 | if (retval == PDC_OK) { | |
424 | name[pdc_result[0]] = '\0'; /* add trailing '\0' */ | |
425 | } else { | |
426 | name[0] = 0; | |
427 | } | |
428 | spin_unlock_irq(&pdc_lock); | |
429 | ||
430 | return retval; | |
431 | } | |
432 | ||
433 | /** | |
434 | * pdc_model_versions - Identify the version number of each processor. | |
435 | * @cpu_id: The return buffer. | |
436 | * @id: The id of the processor to check. | |
437 | * | |
438 | * Returns the version number for each processor component. | |
439 | * | |
440 | * This comment was here before, but I do not know what it means :( -RB | |
441 | * id: 0 = cpu revision, 1 = boot-rom-version | |
442 | */ | |
443 | int pdc_model_versions(unsigned long *versions, int id) | |
444 | { | |
445 | int retval; | |
446 | ||
447 | spin_lock_irq(&pdc_lock); | |
448 | retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_VERSIONS, __pa(pdc_result), id); | |
449 | convert_to_wide(pdc_result); | |
450 | *versions = pdc_result[0]; | |
451 | spin_unlock_irq(&pdc_lock); | |
452 | ||
453 | return retval; | |
454 | } | |
455 | ||
456 | /** | |
457 | * pdc_model_cpuid - Returns the CPU_ID. | |
458 | * @cpu_id: The return buffer. | |
459 | * | |
460 | * Returns the CPU_ID value which uniquely identifies the cpu portion of | |
461 | * the processor module. | |
462 | */ | |
463 | int pdc_model_cpuid(unsigned long *cpu_id) | |
464 | { | |
465 | int retval; | |
466 | ||
467 | spin_lock_irq(&pdc_lock); | |
468 | pdc_result[0] = 0; /* preset zero (call may not be implemented!) */ | |
469 | retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CPU_ID, __pa(pdc_result), 0); | |
470 | convert_to_wide(pdc_result); | |
471 | *cpu_id = pdc_result[0]; | |
472 | spin_unlock_irq(&pdc_lock); | |
473 | ||
474 | return retval; | |
475 | } | |
476 | ||
477 | /** | |
478 | * pdc_model_capabilities - Returns the platform capabilities. | |
479 | * @capabilities: The return buffer. | |
480 | * | |
481 | * Returns information about platform support for 32- and/or 64-bit | |
482 | * OSes, IO-PDIR coherency, and virtual aliasing. | |
483 | */ | |
484 | int pdc_model_capabilities(unsigned long *capabilities) | |
485 | { | |
486 | int retval; | |
487 | ||
488 | spin_lock_irq(&pdc_lock); | |
489 | pdc_result[0] = 0; /* preset zero (call may not be implemented!) */ | |
490 | retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES, __pa(pdc_result), 0); | |
491 | convert_to_wide(pdc_result); | |
492 | *capabilities = pdc_result[0]; | |
493 | spin_unlock_irq(&pdc_lock); | |
494 | ||
495 | return retval; | |
496 | } | |
497 | ||
498 | /** | |
499 | * pdc_cache_info - Return cache and TLB information. | |
500 | * @cache_info: The return buffer. | |
501 | * | |
502 | * Returns information about the processor's cache and TLB. | |
503 | */ | |
504 | int pdc_cache_info(struct pdc_cache_info *cache_info) | |
505 | { | |
506 | int retval; | |
507 | ||
508 | spin_lock_irq(&pdc_lock); | |
509 | retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_INFO, __pa(pdc_result), 0); | |
510 | convert_to_wide(pdc_result); | |
511 | memcpy(cache_info, pdc_result, sizeof(*cache_info)); | |
512 | spin_unlock_irq(&pdc_lock); | |
513 | ||
514 | return retval; | |
515 | } | |
516 | ||
a9d2d386 KM |
517 | /** |
518 | * pdc_spaceid_bits - Return whether Space ID hashing is turned on. | |
519 | * @space_bits: Should be 0, if not, bad mojo! | |
520 | * | |
521 | * Returns information about Space ID hashing. | |
522 | */ | |
523 | int pdc_spaceid_bits(unsigned long *space_bits) | |
524 | { | |
525 | int retval; | |
526 | ||
527 | spin_lock_irq(&pdc_lock); | |
528 | pdc_result[0] = 0; | |
529 | retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_RET_SPID, __pa(pdc_result), 0); | |
530 | convert_to_wide(pdc_result); | |
531 | *space_bits = pdc_result[0]; | |
532 | spin_unlock_irq(&pdc_lock); | |
533 | ||
534 | return retval; | |
535 | } | |
536 | ||
1da177e4 LT |
537 | #ifndef CONFIG_PA20 |
538 | /** | |
539 | * pdc_btlb_info - Return block TLB information. | |
540 | * @btlb: The return buffer. | |
541 | * | |
542 | * Returns information about the hardware Block TLB. | |
543 | */ | |
544 | int pdc_btlb_info(struct pdc_btlb_info *btlb) | |
545 | { | |
546 | int retval; | |
547 | ||
548 | spin_lock_irq(&pdc_lock); | |
549 | retval = mem_pdc_call(PDC_BLOCK_TLB, PDC_BTLB_INFO, __pa(pdc_result), 0); | |
550 | memcpy(btlb, pdc_result, sizeof(*btlb)); | |
551 | spin_unlock_irq(&pdc_lock); | |
552 | ||
553 | if(retval < 0) { | |
554 | btlb->max_size = 0; | |
555 | } | |
556 | return retval; | |
557 | } | |
558 | ||
559 | /** | |
560 | * pdc_mem_map_hpa - Find fixed module information. | |
561 | * @address: The return buffer | |
562 | * @mod_path: pointer to dev path structure. | |
563 | * | |
564 | * This call was developed for S700 workstations to allow the kernel to find | |
565 | * the I/O devices (Core I/O). In the future (Kittyhawk and beyond) this | |
566 | * call will be replaced (on workstations) by the architected PDC_SYSTEM_MAP | |
567 | * call. | |
568 | * | |
569 | * This call is supported by all existing S700 workstations (up to Gecko). | |
570 | */ | |
571 | int pdc_mem_map_hpa(struct pdc_memory_map *address, | |
572 | struct pdc_module_path *mod_path) | |
573 | { | |
574 | int retval; | |
575 | ||
576 | spin_lock_irq(&pdc_lock); | |
577 | memcpy(pdc_result2, mod_path, sizeof(*mod_path)); | |
578 | retval = mem_pdc_call(PDC_MEM_MAP, PDC_MEM_MAP_HPA, __pa(pdc_result), | |
579 | __pa(pdc_result2)); | |
580 | memcpy(address, pdc_result, sizeof(*address)); | |
581 | spin_unlock_irq(&pdc_lock); | |
582 | ||
583 | return retval; | |
584 | } | |
585 | #endif /* !CONFIG_PA20 */ | |
586 | ||
587 | /** | |
588 | * pdc_lan_station_id - Get the LAN address. | |
589 | * @lan_addr: The return buffer. | |
590 | * @hpa: The network device HPA. | |
591 | * | |
592 | * Get the LAN station address when it is not directly available from the LAN hardware. | |
593 | */ | |
594 | int pdc_lan_station_id(char *lan_addr, unsigned long hpa) | |
595 | { | |
596 | int retval; | |
597 | ||
598 | spin_lock_irq(&pdc_lock); | |
599 | retval = mem_pdc_call(PDC_LAN_STATION_ID, PDC_LAN_STATION_ID_READ, | |
600 | __pa(pdc_result), hpa); | |
601 | if (retval < 0) { | |
602 | /* FIXME: else read MAC from NVRAM */ | |
603 | memset(lan_addr, 0, PDC_LAN_STATION_ID_SIZE); | |
604 | } else { | |
605 | memcpy(lan_addr, pdc_result, PDC_LAN_STATION_ID_SIZE); | |
606 | } | |
607 | spin_unlock_irq(&pdc_lock); | |
608 | ||
609 | return retval; | |
610 | } | |
611 | EXPORT_SYMBOL(pdc_lan_station_id); | |
612 | ||
613 | /** | |
614 | * pdc_stable_read - Read data from Stable Storage. | |
615 | * @staddr: Stable Storage address to access. | |
616 | * @memaddr: The memory address where Stable Storage data shall be copied. | |
617 | * @count: number of bytes to transfert. count is multiple of 4. | |
618 | * | |
619 | * This PDC call reads from the Stable Storage address supplied in staddr | |
620 | * and copies count bytes to the memory address memaddr. | |
621 | * The call will fail if staddr+count > PDC_STABLE size. | |
622 | */ | |
623 | int pdc_stable_read(unsigned long staddr, void *memaddr, unsigned long count) | |
624 | { | |
625 | int retval; | |
626 | ||
627 | spin_lock_irq(&pdc_lock); | |
628 | retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_READ, staddr, | |
629 | __pa(pdc_result), count); | |
630 | convert_to_wide(pdc_result); | |
631 | memcpy(memaddr, pdc_result, count); | |
632 | spin_unlock_irq(&pdc_lock); | |
633 | ||
634 | return retval; | |
635 | } | |
636 | EXPORT_SYMBOL(pdc_stable_read); | |
637 | ||
638 | /** | |
639 | * pdc_stable_write - Write data to Stable Storage. | |
640 | * @staddr: Stable Storage address to access. | |
641 | * @memaddr: The memory address where Stable Storage data shall be read from. | |
642 | * @count: number of bytes to transfert. count is multiple of 4. | |
643 | * | |
644 | * This PDC call reads count bytes from the supplied memaddr address, | |
645 | * and copies count bytes to the Stable Storage address staddr. | |
646 | * The call will fail if staddr+count > PDC_STABLE size. | |
647 | */ | |
648 | int pdc_stable_write(unsigned long staddr, void *memaddr, unsigned long count) | |
649 | { | |
650 | int retval; | |
651 | ||
652 | spin_lock_irq(&pdc_lock); | |
653 | memcpy(pdc_result, memaddr, count); | |
654 | convert_to_wide(pdc_result); | |
655 | retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_WRITE, staddr, | |
656 | __pa(pdc_result), count); | |
657 | spin_unlock_irq(&pdc_lock); | |
658 | ||
659 | return retval; | |
660 | } | |
661 | EXPORT_SYMBOL(pdc_stable_write); | |
662 | ||
663 | /** | |
664 | * pdc_stable_get_size - Get Stable Storage size in bytes. | |
665 | * @size: pointer where the size will be stored. | |
666 | * | |
667 | * This PDC call returns the number of bytes in the processor's Stable | |
668 | * Storage, which is the number of contiguous bytes implemented in Stable | |
669 | * Storage starting from staddr=0. size in an unsigned 64-bit integer | |
670 | * which is a multiple of four. | |
671 | */ | |
672 | int pdc_stable_get_size(unsigned long *size) | |
673 | { | |
674 | int retval; | |
675 | ||
676 | spin_lock_irq(&pdc_lock); | |
677 | retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_RETURN_SIZE, __pa(pdc_result)); | |
678 | *size = pdc_result[0]; | |
679 | spin_unlock_irq(&pdc_lock); | |
680 | ||
681 | return retval; | |
682 | } | |
683 | EXPORT_SYMBOL(pdc_stable_get_size); | |
684 | ||
685 | /** | |
686 | * pdc_stable_verify_contents - Checks that Stable Storage contents are valid. | |
687 | * | |
688 | * This PDC call is meant to be used to check the integrity of the current | |
689 | * contents of Stable Storage. | |
690 | */ | |
691 | int pdc_stable_verify_contents(void) | |
692 | { | |
693 | int retval; | |
694 | ||
695 | spin_lock_irq(&pdc_lock); | |
696 | retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_VERIFY_CONTENTS); | |
697 | spin_unlock_irq(&pdc_lock); | |
698 | ||
699 | return retval; | |
700 | } | |
701 | EXPORT_SYMBOL(pdc_stable_verify_contents); | |
702 | ||
703 | /** | |
704 | * pdc_stable_initialize - Sets Stable Storage contents to zero and initialize | |
705 | * the validity indicator. | |
706 | * | |
707 | * This PDC call will erase all contents of Stable Storage. Use with care! | |
708 | */ | |
709 | int pdc_stable_initialize(void) | |
710 | { | |
711 | int retval; | |
712 | ||
713 | spin_lock_irq(&pdc_lock); | |
714 | retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_INITIALIZE); | |
715 | spin_unlock_irq(&pdc_lock); | |
716 | ||
717 | return retval; | |
718 | } | |
719 | EXPORT_SYMBOL(pdc_stable_initialize); | |
720 | ||
721 | /** | |
722 | * pdc_get_initiator - Get the SCSI Interface Card params (SCSI ID, SDTR, SE or LVD) | |
723 | * @hwpath: fully bc.mod style path to the device. | |
724 | * @initiator: the array to return the result into | |
725 | * | |
726 | * Get the SCSI operational parameters from PDC. | |
727 | * Needed since HPUX never used BIOS or symbios card NVRAM. | |
728 | * Most ncr/sym cards won't have an entry and just use whatever | |
729 | * capabilities of the card are (eg Ultra, LVD). But there are | |
730 | * several cases where it's useful: | |
731 | * o set SCSI id for Multi-initiator clusters, | |
732 | * o cable too long (ie SE scsi 10Mhz won't support 6m length), | |
733 | * o bus width exported is less than what the interface chip supports. | |
734 | */ | |
735 | int pdc_get_initiator(struct hardware_path *hwpath, struct pdc_initiator *initiator) | |
736 | { | |
737 | int retval; | |
738 | ||
739 | spin_lock_irq(&pdc_lock); | |
740 | ||
741 | /* BCJ-XXXX series boxes. E.G. "9000/785/C3000" */ | |
742 | #define IS_SPROCKETS() (strlen(boot_cpu_data.pdc.sys_model_name) == 14 && \ | |
743 | strncmp(boot_cpu_data.pdc.sys_model_name, "9000/785", 8) == 0) | |
744 | ||
745 | retval = mem_pdc_call(PDC_INITIATOR, PDC_GET_INITIATOR, | |
746 | __pa(pdc_result), __pa(hwpath)); | |
747 | if (retval < PDC_OK) | |
748 | goto out; | |
749 | ||
750 | if (pdc_result[0] < 16) { | |
751 | initiator->host_id = pdc_result[0]; | |
752 | } else { | |
753 | initiator->host_id = -1; | |
754 | } | |
755 | ||
756 | /* | |
757 | * Sprockets and Piranha return 20 or 40 (MT/s). Prelude returns | |
758 | * 1, 2, 5 or 10 for 5, 10, 20 or 40 MT/s, respectively | |
759 | */ | |
760 | switch (pdc_result[1]) { | |
761 | case 1: initiator->factor = 50; break; | |
762 | case 2: initiator->factor = 25; break; | |
763 | case 5: initiator->factor = 12; break; | |
764 | case 25: initiator->factor = 10; break; | |
765 | case 20: initiator->factor = 12; break; | |
766 | case 40: initiator->factor = 10; break; | |
767 | default: initiator->factor = -1; break; | |
768 | } | |
769 | ||
770 | if (IS_SPROCKETS()) { | |
771 | initiator->width = pdc_result[4]; | |
772 | initiator->mode = pdc_result[5]; | |
773 | } else { | |
774 | initiator->width = -1; | |
775 | initiator->mode = -1; | |
776 | } | |
777 | ||
778 | out: | |
779 | spin_unlock_irq(&pdc_lock); | |
780 | return (retval >= PDC_OK); | |
781 | } | |
782 | EXPORT_SYMBOL(pdc_get_initiator); | |
783 | ||
784 | ||
785 | /** | |
786 | * pdc_pci_irt_size - Get the number of entries in the interrupt routing table. | |
787 | * @num_entries: The return value. | |
788 | * @hpa: The HPA for the device. | |
789 | * | |
790 | * This PDC function returns the number of entries in the specified cell's | |
791 | * interrupt table. | |
792 | * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes | |
793 | */ | |
794 | int pdc_pci_irt_size(unsigned long *num_entries, unsigned long hpa) | |
795 | { | |
796 | int retval; | |
797 | ||
798 | spin_lock_irq(&pdc_lock); | |
799 | retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL_SIZE, | |
800 | __pa(pdc_result), hpa); | |
801 | convert_to_wide(pdc_result); | |
802 | *num_entries = pdc_result[0]; | |
803 | spin_unlock_irq(&pdc_lock); | |
804 | ||
805 | return retval; | |
806 | } | |
807 | ||
808 | /** | |
809 | * pdc_pci_irt - Get the PCI interrupt routing table. | |
810 | * @num_entries: The number of entries in the table. | |
811 | * @hpa: The Hard Physical Address of the device. | |
812 | * @tbl: | |
813 | * | |
814 | * Get the PCI interrupt routing table for the device at the given HPA. | |
815 | * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes | |
816 | */ | |
817 | int pdc_pci_irt(unsigned long num_entries, unsigned long hpa, void *tbl) | |
818 | { | |
819 | int retval; | |
820 | ||
821 | BUG_ON((unsigned long)tbl & 0x7); | |
822 | ||
823 | spin_lock_irq(&pdc_lock); | |
824 | pdc_result[0] = num_entries; | |
825 | retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL, | |
826 | __pa(pdc_result), hpa, __pa(tbl)); | |
827 | spin_unlock_irq(&pdc_lock); | |
828 | ||
829 | return retval; | |
830 | } | |
831 | ||
832 | ||
833 | #if 0 /* UNTEST CODE - left here in case someone needs it */ | |
834 | ||
835 | /** | |
836 | * pdc_pci_config_read - read PCI config space. | |
837 | * @hpa token from PDC to indicate which PCI device | |
838 | * @pci_addr configuration space address to read from | |
839 | * | |
840 | * Read PCI Configuration space *before* linux PCI subsystem is running. | |
841 | */ | |
842 | unsigned int pdc_pci_config_read(void *hpa, unsigned long cfg_addr) | |
843 | { | |
844 | int retval; | |
845 | spin_lock_irq(&pdc_lock); | |
846 | pdc_result[0] = 0; | |
847 | pdc_result[1] = 0; | |
848 | retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_READ_CONFIG, | |
849 | __pa(pdc_result), hpa, cfg_addr&~3UL, 4UL); | |
850 | spin_unlock_irq(&pdc_lock); | |
851 | return retval ? ~0 : (unsigned int) pdc_result[0]; | |
852 | } | |
853 | ||
854 | ||
855 | /** | |
856 | * pdc_pci_config_write - read PCI config space. | |
857 | * @hpa token from PDC to indicate which PCI device | |
858 | * @pci_addr configuration space address to write | |
859 | * @val value we want in the 32-bit register | |
860 | * | |
861 | * Write PCI Configuration space *before* linux PCI subsystem is running. | |
862 | */ | |
863 | void pdc_pci_config_write(void *hpa, unsigned long cfg_addr, unsigned int val) | |
864 | { | |
865 | int retval; | |
866 | spin_lock_irq(&pdc_lock); | |
867 | pdc_result[0] = 0; | |
868 | retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_WRITE_CONFIG, | |
869 | __pa(pdc_result), hpa, | |
870 | cfg_addr&~3UL, 4UL, (unsigned long) val); | |
871 | spin_unlock_irq(&pdc_lock); | |
872 | return retval; | |
873 | } | |
874 | #endif /* UNTESTED CODE */ | |
875 | ||
876 | /** | |
877 | * pdc_tod_read - Read the Time-Of-Day clock. | |
878 | * @tod: The return buffer: | |
879 | * | |
880 | * Read the Time-Of-Day clock | |
881 | */ | |
882 | int pdc_tod_read(struct pdc_tod *tod) | |
883 | { | |
884 | int retval; | |
885 | ||
886 | spin_lock_irq(&pdc_lock); | |
887 | retval = mem_pdc_call(PDC_TOD, PDC_TOD_READ, __pa(pdc_result), 0); | |
888 | convert_to_wide(pdc_result); | |
889 | memcpy(tod, pdc_result, sizeof(*tod)); | |
890 | spin_unlock_irq(&pdc_lock); | |
891 | ||
892 | return retval; | |
893 | } | |
894 | EXPORT_SYMBOL(pdc_tod_read); | |
895 | ||
896 | /** | |
897 | * pdc_tod_set - Set the Time-Of-Day clock. | |
898 | * @sec: The number of seconds since epoch. | |
899 | * @usec: The number of micro seconds. | |
900 | * | |
901 | * Set the Time-Of-Day clock. | |
902 | */ | |
903 | int pdc_tod_set(unsigned long sec, unsigned long usec) | |
904 | { | |
905 | int retval; | |
906 | ||
907 | spin_lock_irq(&pdc_lock); | |
908 | retval = mem_pdc_call(PDC_TOD, PDC_TOD_WRITE, sec, usec); | |
909 | spin_unlock_irq(&pdc_lock); | |
910 | ||
911 | return retval; | |
912 | } | |
913 | EXPORT_SYMBOL(pdc_tod_set); | |
914 | ||
915 | #ifdef __LP64__ | |
916 | int pdc_mem_mem_table(struct pdc_memory_table_raddr *r_addr, | |
917 | struct pdc_memory_table *tbl, unsigned long entries) | |
918 | { | |
919 | int retval; | |
920 | ||
921 | spin_lock_irq(&pdc_lock); | |
922 | retval = mem_pdc_call(PDC_MEM, PDC_MEM_TABLE, __pa(pdc_result), __pa(pdc_result2), entries); | |
923 | convert_to_wide(pdc_result); | |
924 | memcpy(r_addr, pdc_result, sizeof(*r_addr)); | |
925 | memcpy(tbl, pdc_result2, entries * sizeof(*tbl)); | |
926 | spin_unlock_irq(&pdc_lock); | |
927 | ||
928 | return retval; | |
929 | } | |
930 | #endif /* __LP64__ */ | |
931 | ||
932 | /* FIXME: Is this pdc used? I could not find type reference to ftc_bitmap | |
933 | * so I guessed at unsigned long. Someone who knows what this does, can fix | |
934 | * it later. :) | |
935 | */ | |
936 | int pdc_do_firm_test_reset(unsigned long ftc_bitmap) | |
937 | { | |
938 | int retval; | |
939 | ||
940 | spin_lock_irq(&pdc_lock); | |
941 | retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_FIRM_TEST_RESET, | |
942 | PDC_FIRM_TEST_MAGIC, ftc_bitmap); | |
943 | spin_unlock_irq(&pdc_lock); | |
944 | ||
945 | return retval; | |
946 | } | |
947 | ||
948 | /* | |
949 | * pdc_do_reset - Reset the system. | |
950 | * | |
951 | * Reset the system. | |
952 | */ | |
953 | int pdc_do_reset(void) | |
954 | { | |
955 | int retval; | |
956 | ||
957 | spin_lock_irq(&pdc_lock); | |
958 | retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_RESET); | |
959 | spin_unlock_irq(&pdc_lock); | |
960 | ||
961 | return retval; | |
962 | } | |
963 | ||
964 | /* | |
965 | * pdc_soft_power_info - Enable soft power switch. | |
966 | * @power_reg: address of soft power register | |
967 | * | |
968 | * Return the absolute address of the soft power switch register | |
969 | */ | |
970 | int __init pdc_soft_power_info(unsigned long *power_reg) | |
971 | { | |
972 | int retval; | |
973 | ||
974 | *power_reg = (unsigned long) (-1); | |
975 | ||
976 | spin_lock_irq(&pdc_lock); | |
977 | retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_INFO, __pa(pdc_result), 0); | |
978 | if (retval == PDC_OK) { | |
979 | convert_to_wide(pdc_result); | |
980 | *power_reg = f_extend(pdc_result[0]); | |
981 | } | |
982 | spin_unlock_irq(&pdc_lock); | |
983 | ||
984 | return retval; | |
985 | } | |
986 | ||
987 | /* | |
988 | * pdc_soft_power_button - Control the soft power button behaviour | |
989 | * @sw_control: 0 for hardware control, 1 for software control | |
990 | * | |
991 | * | |
992 | * This PDC function places the soft power button under software or | |
993 | * hardware control. | |
994 | * Under software control the OS may control to when to allow to shut | |
995 | * down the system. Under hardware control pressing the power button | |
996 | * powers off the system immediately. | |
997 | */ | |
998 | int pdc_soft_power_button(int sw_control) | |
999 | { | |
1000 | int retval; | |
1001 | spin_lock_irq(&pdc_lock); | |
1002 | retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_ENABLE, __pa(pdc_result), sw_control); | |
1003 | spin_unlock_irq(&pdc_lock); | |
1004 | return retval; | |
1005 | } | |
1006 | ||
1007 | /* | |
1008 | * pdc_io_reset - Hack to avoid overlapping range registers of Bridges devices. | |
1009 | * Primarily a problem on T600 (which parisc-linux doesn't support) but | |
1010 | * who knows what other platform firmware might do with this OS "hook". | |
1011 | */ | |
1012 | void pdc_io_reset(void) | |
1013 | { | |
1014 | spin_lock_irq(&pdc_lock); | |
1015 | mem_pdc_call(PDC_IO, PDC_IO_RESET, 0); | |
1016 | spin_unlock_irq(&pdc_lock); | |
1017 | } | |
1018 | ||
1019 | /* | |
1020 | * pdc_io_reset_devices - Hack to Stop USB controller | |
1021 | * | |
1022 | * If PDC used the usb controller, the usb controller | |
1023 | * is still running and will crash the machines during iommu | |
1024 | * setup, because of still running DMA. This PDC call | |
1025 | * stops the USB controller. | |
1026 | * Normally called after calling pdc_io_reset(). | |
1027 | */ | |
1028 | void pdc_io_reset_devices(void) | |
1029 | { | |
1030 | spin_lock_irq(&pdc_lock); | |
1031 | mem_pdc_call(PDC_IO, PDC_IO_RESET_DEVICES, 0); | |
1032 | spin_unlock_irq(&pdc_lock); | |
1033 | } | |
1034 | ||
1035 | ||
1036 | /** | |
1037 | * pdc_iodc_putc - Console character print using IODC. | |
1038 | * @c: the character to output. | |
1039 | * | |
1040 | * Note that only these special chars are architected for console IODC io: | |
1041 | * BEL, BS, CR, and LF. Others are passed through. | |
1042 | * Since the HP console requires CR+LF to perform a 'newline', we translate | |
1043 | * "\n" to "\r\n". | |
1044 | */ | |
1045 | void pdc_iodc_putc(unsigned char c) | |
1046 | { | |
1047 | /* XXX Should we spinlock posx usage */ | |
1048 | static int posx; /* for simple TAB-Simulation... */ | |
1049 | static int __attribute__((aligned(8))) iodc_retbuf[32]; | |
1050 | static char __attribute__((aligned(64))) iodc_dbuf[4096]; | |
1051 | unsigned int n; | |
c53421b1 | 1052 | unsigned long flags; |
1da177e4 LT |
1053 | |
1054 | switch (c) { | |
1055 | case '\n': | |
1056 | iodc_dbuf[0] = '\r'; | |
1057 | iodc_dbuf[1] = '\n'; | |
1058 | n = 2; | |
1059 | posx = 0; | |
1060 | break; | |
1061 | case '\t': | |
1062 | pdc_iodc_putc(' '); | |
1063 | while (posx & 7) /* expand TAB */ | |
1064 | pdc_iodc_putc(' '); | |
1065 | return; /* return since IODC can't handle this */ | |
1066 | case '\b': | |
1067 | posx-=2; /* BS */ | |
1068 | default: | |
1069 | iodc_dbuf[0] = c; | |
1070 | n = 1; | |
1071 | posx++; | |
1072 | break; | |
1073 | } | |
1074 | ||
1075 | spin_lock_irqsave(&pdc_lock, flags); | |
1076 | real32_call(PAGE0->mem_cons.iodc_io, | |
1077 | (unsigned long)PAGE0->mem_cons.hpa, ENTRY_IO_COUT, | |
1078 | PAGE0->mem_cons.spa, __pa(PAGE0->mem_cons.dp.layers), | |
1079 | __pa(iodc_retbuf), 0, __pa(iodc_dbuf), n, 0); | |
1080 | spin_unlock_irqrestore(&pdc_lock, flags); | |
1081 | } | |
1082 | ||
1083 | /** | |
1084 | * pdc_iodc_outc - Console character print using IODC (without conversions). | |
1085 | * @c: the character to output. | |
1086 | * | |
1087 | * Write the character directly to the IODC console. | |
1088 | */ | |
1089 | void pdc_iodc_outc(unsigned char c) | |
1090 | { | |
c53421b1 AD |
1091 | unsigned int n; |
1092 | unsigned long flags; | |
1da177e4 LT |
1093 | |
1094 | /* fill buffer with one caracter and print it */ | |
1095 | static int __attribute__((aligned(8))) iodc_retbuf[32]; | |
1096 | static char __attribute__((aligned(64))) iodc_dbuf[4096]; | |
1097 | ||
1098 | n = 1; | |
1099 | iodc_dbuf[0] = c; | |
1100 | ||
1101 | spin_lock_irqsave(&pdc_lock, flags); | |
1102 | real32_call(PAGE0->mem_cons.iodc_io, | |
1103 | (unsigned long)PAGE0->mem_cons.hpa, ENTRY_IO_COUT, | |
1104 | PAGE0->mem_cons.spa, __pa(PAGE0->mem_cons.dp.layers), | |
1105 | __pa(iodc_retbuf), 0, __pa(iodc_dbuf), n, 0); | |
1106 | spin_unlock_irqrestore(&pdc_lock, flags); | |
1107 | } | |
1108 | ||
1109 | /** | |
1110 | * pdc_iodc_getc - Read a character (non-blocking) from the PDC console. | |
1111 | * | |
1112 | * Read a character (non-blocking) from the PDC console, returns -1 if | |
1113 | * key is not present. | |
1114 | */ | |
1115 | int pdc_iodc_getc(void) | |
1116 | { | |
c53421b1 | 1117 | unsigned long flags; |
1da177e4 LT |
1118 | static int __attribute__((aligned(8))) iodc_retbuf[32]; |
1119 | static char __attribute__((aligned(64))) iodc_dbuf[4096]; | |
1120 | int ch; | |
1121 | int status; | |
1122 | ||
1123 | /* Bail if no console input device. */ | |
1124 | if (!PAGE0->mem_kbd.iodc_io) | |
1125 | return 0; | |
1126 | ||
1127 | /* wait for a keyboard (rs232)-input */ | |
1128 | spin_lock_irqsave(&pdc_lock, flags); | |
1129 | real32_call(PAGE0->mem_kbd.iodc_io, | |
1130 | (unsigned long)PAGE0->mem_kbd.hpa, ENTRY_IO_CIN, | |
1131 | PAGE0->mem_kbd.spa, __pa(PAGE0->mem_kbd.dp.layers), | |
1132 | __pa(iodc_retbuf), 0, __pa(iodc_dbuf), 1, 0); | |
1133 | ||
1134 | ch = *iodc_dbuf; | |
1135 | status = *iodc_retbuf; | |
1136 | spin_unlock_irqrestore(&pdc_lock, flags); | |
1137 | ||
1138 | if (status == 0) | |
1139 | return -1; | |
1140 | ||
1141 | return ch; | |
1142 | } | |
1143 | ||
1144 | int pdc_sti_call(unsigned long func, unsigned long flags, | |
1145 | unsigned long inptr, unsigned long outputr, | |
1146 | unsigned long glob_cfg) | |
1147 | { | |
1148 | int retval; | |
1149 | ||
1150 | spin_lock_irq(&pdc_lock); | |
1151 | retval = real32_call(func, flags, inptr, outputr, glob_cfg); | |
1152 | spin_unlock_irq(&pdc_lock); | |
1153 | ||
1154 | return retval; | |
1155 | } | |
1156 | EXPORT_SYMBOL(pdc_sti_call); | |
1157 | ||
1158 | #ifdef __LP64__ | |
1159 | /** | |
1160 | * pdc_pat_cell_get_number - Returns the cell number. | |
1161 | * @cell_info: The return buffer. | |
1162 | * | |
1163 | * This PDC call returns the cell number of the cell from which the call | |
1164 | * is made. | |
1165 | */ | |
1166 | int pdc_pat_cell_get_number(struct pdc_pat_cell_num *cell_info) | |
1167 | { | |
1168 | int retval; | |
1169 | ||
1170 | spin_lock_irq(&pdc_lock); | |
1171 | retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_GET_NUMBER, __pa(pdc_result)); | |
1172 | memcpy(cell_info, pdc_result, sizeof(*cell_info)); | |
1173 | spin_unlock_irq(&pdc_lock); | |
1174 | ||
1175 | return retval; | |
1176 | } | |
1177 | ||
1178 | /** | |
1179 | * pdc_pat_cell_module - Retrieve the cell's module information. | |
1180 | * @actcnt: The number of bytes written to mem_addr. | |
1181 | * @ploc: The physical location. | |
1182 | * @mod: The module index. | |
1183 | * @view_type: The view of the address type. | |
1184 | * @mem_addr: The return buffer. | |
1185 | * | |
1186 | * This PDC call returns information about each module attached to the cell | |
1187 | * at the specified location. | |
1188 | */ | |
1189 | int pdc_pat_cell_module(unsigned long *actcnt, unsigned long ploc, unsigned long mod, | |
1190 | unsigned long view_type, void *mem_addr) | |
1191 | { | |
1192 | int retval; | |
1193 | static struct pdc_pat_cell_mod_maddr_block result __attribute__ ((aligned (8))); | |
1194 | ||
1195 | spin_lock_irq(&pdc_lock); | |
1196 | retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_MODULE, __pa(pdc_result), | |
1197 | ploc, mod, view_type, __pa(&result)); | |
1198 | if(!retval) { | |
1199 | *actcnt = pdc_result[0]; | |
1200 | memcpy(mem_addr, &result, *actcnt); | |
1201 | } | |
1202 | spin_unlock_irq(&pdc_lock); | |
1203 | ||
1204 | return retval; | |
1205 | } | |
1206 | ||
1207 | /** | |
1208 | * pdc_pat_cpu_get_number - Retrieve the cpu number. | |
1209 | * @cpu_info: The return buffer. | |
1210 | * @hpa: The Hard Physical Address of the CPU. | |
1211 | * | |
1212 | * Retrieve the cpu number for the cpu at the specified HPA. | |
1213 | */ | |
1214 | int pdc_pat_cpu_get_number(struct pdc_pat_cpu_num *cpu_info, void *hpa) | |
1215 | { | |
1216 | int retval; | |
1217 | ||
1218 | spin_lock_irq(&pdc_lock); | |
1219 | retval = mem_pdc_call(PDC_PAT_CPU, PDC_PAT_CPU_GET_NUMBER, | |
1220 | __pa(&pdc_result), hpa); | |
1221 | memcpy(cpu_info, pdc_result, sizeof(*cpu_info)); | |
1222 | spin_unlock_irq(&pdc_lock); | |
1223 | ||
1224 | return retval; | |
1225 | } | |
1226 | ||
1227 | /** | |
1228 | * pdc_pat_get_irt_size - Retrieve the number of entries in the cell's interrupt table. | |
1229 | * @num_entries: The return value. | |
1230 | * @cell_num: The target cell. | |
1231 | * | |
1232 | * This PDC function returns the number of entries in the specified cell's | |
1233 | * interrupt table. | |
1234 | */ | |
1235 | int pdc_pat_get_irt_size(unsigned long *num_entries, unsigned long cell_num) | |
1236 | { | |
1237 | int retval; | |
1238 | ||
1239 | spin_lock_irq(&pdc_lock); | |
1240 | retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE_SIZE, | |
1241 | __pa(pdc_result), cell_num); | |
1242 | *num_entries = pdc_result[0]; | |
1243 | spin_unlock_irq(&pdc_lock); | |
1244 | ||
1245 | return retval; | |
1246 | } | |
1247 | ||
1248 | /** | |
1249 | * pdc_pat_get_irt - Retrieve the cell's interrupt table. | |
1250 | * @r_addr: The return buffer. | |
1251 | * @cell_num: The target cell. | |
1252 | * | |
1253 | * This PDC function returns the actual interrupt table for the specified cell. | |
1254 | */ | |
1255 | int pdc_pat_get_irt(void *r_addr, unsigned long cell_num) | |
1256 | { | |
1257 | int retval; | |
1258 | ||
1259 | spin_lock_irq(&pdc_lock); | |
1260 | retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE, | |
1261 | __pa(r_addr), cell_num); | |
1262 | spin_unlock_irq(&pdc_lock); | |
1263 | ||
1264 | return retval; | |
1265 | } | |
1266 | ||
1267 | /** | |
1268 | * pdc_pat_pd_get_addr_map - Retrieve information about memory address ranges. | |
1269 | * @actlen: The return buffer. | |
1270 | * @mem_addr: Pointer to the memory buffer. | |
1271 | * @count: The number of bytes to read from the buffer. | |
1272 | * @offset: The offset with respect to the beginning of the buffer. | |
1273 | * | |
1274 | */ | |
1275 | int pdc_pat_pd_get_addr_map(unsigned long *actual_len, void *mem_addr, | |
1276 | unsigned long count, unsigned long offset) | |
1277 | { | |
1278 | int retval; | |
1279 | ||
1280 | spin_lock_irq(&pdc_lock); | |
1281 | retval = mem_pdc_call(PDC_PAT_PD, PDC_PAT_PD_GET_ADDR_MAP, __pa(pdc_result), | |
1282 | __pa(pdc_result2), count, offset); | |
1283 | *actual_len = pdc_result[0]; | |
1284 | memcpy(mem_addr, pdc_result2, *actual_len); | |
1285 | spin_unlock_irq(&pdc_lock); | |
1286 | ||
1287 | return retval; | |
1288 | } | |
1289 | ||
1290 | /** | |
1291 | * pdc_pat_io_pci_cfg_read - Read PCI configuration space. | |
1292 | * @pci_addr: PCI configuration space address for which the read request is being made. | |
1293 | * @pci_size: Size of read in bytes. Valid values are 1, 2, and 4. | |
1294 | * @mem_addr: Pointer to return memory buffer. | |
1295 | * | |
1296 | */ | |
1297 | int pdc_pat_io_pci_cfg_read(unsigned long pci_addr, int pci_size, u32 *mem_addr) | |
1298 | { | |
1299 | int retval; | |
1300 | spin_lock_irq(&pdc_lock); | |
1301 | retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_READ, | |
1302 | __pa(pdc_result), pci_addr, pci_size); | |
1303 | switch(pci_size) { | |
1304 | case 1: *(u8 *) mem_addr = (u8) pdc_result[0]; | |
1305 | case 2: *(u16 *)mem_addr = (u16) pdc_result[0]; | |
1306 | case 4: *(u32 *)mem_addr = (u32) pdc_result[0]; | |
1307 | } | |
1308 | spin_unlock_irq(&pdc_lock); | |
1309 | ||
1310 | return retval; | |
1311 | } | |
1312 | ||
1313 | /** | |
1314 | * pdc_pat_io_pci_cfg_write - Retrieve information about memory address ranges. | |
1315 | * @pci_addr: PCI configuration space address for which the write request is being made. | |
1316 | * @pci_size: Size of write in bytes. Valid values are 1, 2, and 4. | |
1317 | * @value: Pointer to 1, 2, or 4 byte value in low order end of argument to be | |
1318 | * written to PCI Config space. | |
1319 | * | |
1320 | */ | |
1321 | int pdc_pat_io_pci_cfg_write(unsigned long pci_addr, int pci_size, u32 val) | |
1322 | { | |
1323 | int retval; | |
1324 | ||
1325 | spin_lock_irq(&pdc_lock); | |
1326 | retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_WRITE, | |
1327 | pci_addr, pci_size, val); | |
1328 | spin_unlock_irq(&pdc_lock); | |
1329 | ||
1330 | return retval; | |
1331 | } | |
1332 | #endif /* __LP64__ */ | |
1333 | ||
1334 | ||
1335 | /***************** 32-bit real-mode calls ***********/ | |
1336 | /* The struct below is used | |
1337 | * to overlay real_stack (real2.S), preparing a 32-bit call frame. | |
1338 | * real32_call_asm() then uses this stack in narrow real mode | |
1339 | */ | |
1340 | ||
1341 | struct narrow_stack { | |
1342 | /* use int, not long which is 64 bits */ | |
1343 | unsigned int arg13; | |
1344 | unsigned int arg12; | |
1345 | unsigned int arg11; | |
1346 | unsigned int arg10; | |
1347 | unsigned int arg9; | |
1348 | unsigned int arg8; | |
1349 | unsigned int arg7; | |
1350 | unsigned int arg6; | |
1351 | unsigned int arg5; | |
1352 | unsigned int arg4; | |
1353 | unsigned int arg3; | |
1354 | unsigned int arg2; | |
1355 | unsigned int arg1; | |
1356 | unsigned int arg0; | |
1357 | unsigned int frame_marker[8]; | |
1358 | unsigned int sp; | |
1359 | /* in reality, there's nearly 8k of stack after this */ | |
1360 | }; | |
1361 | ||
1362 | long real32_call(unsigned long fn, ...) | |
1363 | { | |
1364 | va_list args; | |
1365 | extern struct narrow_stack real_stack; | |
1366 | extern unsigned long real32_call_asm(unsigned int *, | |
1367 | unsigned int *, | |
1368 | unsigned int); | |
1369 | ||
1370 | va_start(args, fn); | |
1371 | real_stack.arg0 = va_arg(args, unsigned int); | |
1372 | real_stack.arg1 = va_arg(args, unsigned int); | |
1373 | real_stack.arg2 = va_arg(args, unsigned int); | |
1374 | real_stack.arg3 = va_arg(args, unsigned int); | |
1375 | real_stack.arg4 = va_arg(args, unsigned int); | |
1376 | real_stack.arg5 = va_arg(args, unsigned int); | |
1377 | real_stack.arg6 = va_arg(args, unsigned int); | |
1378 | real_stack.arg7 = va_arg(args, unsigned int); | |
1379 | real_stack.arg8 = va_arg(args, unsigned int); | |
1380 | real_stack.arg9 = va_arg(args, unsigned int); | |
1381 | real_stack.arg10 = va_arg(args, unsigned int); | |
1382 | real_stack.arg11 = va_arg(args, unsigned int); | |
1383 | real_stack.arg12 = va_arg(args, unsigned int); | |
1384 | real_stack.arg13 = va_arg(args, unsigned int); | |
1385 | va_end(args); | |
1386 | ||
1387 | return real32_call_asm(&real_stack.sp, &real_stack.arg0, fn); | |
1388 | } | |
1389 | ||
1390 | #ifdef __LP64__ | |
1391 | /***************** 64-bit real-mode calls ***********/ | |
1392 | ||
1393 | struct wide_stack { | |
1394 | unsigned long arg0; | |
1395 | unsigned long arg1; | |
1396 | unsigned long arg2; | |
1397 | unsigned long arg3; | |
1398 | unsigned long arg4; | |
1399 | unsigned long arg5; | |
1400 | unsigned long arg6; | |
1401 | unsigned long arg7; | |
1402 | unsigned long arg8; | |
1403 | unsigned long arg9; | |
1404 | unsigned long arg10; | |
1405 | unsigned long arg11; | |
1406 | unsigned long arg12; | |
1407 | unsigned long arg13; | |
1408 | unsigned long frame_marker[2]; /* rp, previous sp */ | |
1409 | unsigned long sp; | |
1410 | /* in reality, there's nearly 8k of stack after this */ | |
1411 | }; | |
1412 | ||
1413 | long real64_call(unsigned long fn, ...) | |
1414 | { | |
1415 | va_list args; | |
1416 | extern struct wide_stack real64_stack; | |
1417 | extern unsigned long real64_call_asm(unsigned long *, | |
1418 | unsigned long *, | |
1419 | unsigned long); | |
1420 | ||
1421 | va_start(args, fn); | |
1422 | real64_stack.arg0 = va_arg(args, unsigned long); | |
1423 | real64_stack.arg1 = va_arg(args, unsigned long); | |
1424 | real64_stack.arg2 = va_arg(args, unsigned long); | |
1425 | real64_stack.arg3 = va_arg(args, unsigned long); | |
1426 | real64_stack.arg4 = va_arg(args, unsigned long); | |
1427 | real64_stack.arg5 = va_arg(args, unsigned long); | |
1428 | real64_stack.arg6 = va_arg(args, unsigned long); | |
1429 | real64_stack.arg7 = va_arg(args, unsigned long); | |
1430 | real64_stack.arg8 = va_arg(args, unsigned long); | |
1431 | real64_stack.arg9 = va_arg(args, unsigned long); | |
1432 | real64_stack.arg10 = va_arg(args, unsigned long); | |
1433 | real64_stack.arg11 = va_arg(args, unsigned long); | |
1434 | real64_stack.arg12 = va_arg(args, unsigned long); | |
1435 | real64_stack.arg13 = va_arg(args, unsigned long); | |
1436 | va_end(args); | |
1437 | ||
1438 | return real64_call_asm(&real64_stack.sp, &real64_stack.arg0, fn); | |
1439 | } | |
1440 | ||
1441 | #endif /* __LP64__ */ | |
1442 |