Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * arch/parisc/kernel/firmware.c - safe PDC access routines |
| 3 | * |
| 4 | * PDC == Processor Dependent Code |
| 5 | * |
| 6 | * See http://www.parisc-linux.org/documentation/index.html |
| 7 | * for documentation describing the entry points and calling |
| 8 | * conventions defined below. |
| 9 | * |
| 10 | * Copyright 1999 SuSE GmbH Nuernberg (Philipp Rumpf, prumpf@tux.org) |
| 11 | * Copyright 1999 The Puffin Group, (Alex deVries, David Kennedy) |
| 12 | * Copyright 2003 Grant Grundler <grundler parisc-linux org> |
| 13 | * Copyright 2003,2004 Ryan Bradetich <rbrad@parisc-linux.org> |
| 14 | * Copyright 2004 Thibaut VARENE <varenet@parisc-linux.org> |
| 15 | * |
| 16 | * This program is free software; you can redistribute it and/or modify |
| 17 | * it under the terms of the GNU General Public License as published by |
| 18 | * the Free Software Foundation; either version 2 of the License, or |
| 19 | * (at your option) any later version. |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | /* I think it would be in everyone's best interest to follow this |
| 24 | * guidelines when writing PDC wrappers: |
| 25 | * |
| 26 | * - the name of the pdc wrapper should match one of the macros |
| 27 | * used for the first two arguments |
| 28 | * - don't use caps for random parts of the name |
| 29 | * - use the static PDC result buffers and "copyout" to structs |
| 30 | * supplied by the caller to encapsulate alignment restrictions |
| 31 | * - hold pdc_lock while in PDC or using static result buffers |
| 32 | * - use __pa() to convert virtual (kernel) pointers to physical |
| 33 | * ones. |
| 34 | * - the name of the struct used for pdc return values should equal |
| 35 | * one of the macros used for the first two arguments to the |
| 36 | * corresponding PDC call |
| 37 | * - keep the order of arguments |
| 38 | * - don't be smart (setting trailing NUL bytes for strings, return |
| 39 | * something useful even if the call failed) unless you are sure |
| 40 | * it's not going to affect functionality or performance |
| 41 | * |
| 42 | * Example: |
| 43 | * int pdc_cache_info(struct pdc_cache_info *cache_info ) |
| 44 | * { |
| 45 | * int retval; |
| 46 | * |
| 47 | * spin_lock_irq(&pdc_lock); |
| 48 | * retval = mem_pdc_call(PDC_CACHE,PDC_CACHE_INFO,__pa(cache_info),0); |
| 49 | * convert_to_wide(pdc_result); |
| 50 | * memcpy(cache_info, pdc_result, sizeof(*cache_info)); |
| 51 | * spin_unlock_irq(&pdc_lock); |
| 52 | * |
| 53 | * return retval; |
| 54 | * } |
| 55 | * prumpf 991016 |
| 56 | */ |
| 57 | |
| 58 | #include <stdarg.h> |
| 59 | |
| 60 | #include <linux/delay.h> |
| 61 | #include <linux/init.h> |
| 62 | #include <linux/kernel.h> |
| 63 | #include <linux/module.h> |
| 64 | #include <linux/string.h> |
| 65 | #include <linux/spinlock.h> |
| 66 | |
| 67 | #include <asm/page.h> |
| 68 | #include <asm/pdc.h> |
| 69 | #include <asm/pdcpat.h> |
| 70 | #include <asm/system.h> |
| 71 | #include <asm/processor.h> /* for boot_cpu_data */ |
| 72 | |
| 73 | static DEFINE_SPINLOCK(pdc_lock); |
| 74 | 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. */ |
| 83 | int parisc_narrow_firmware = 1; |
| 84 | #endif |
| 85 | |
| 86 | /* on all currently-supported platforms, IODC I/O calls are always |
| 87 | * 32-bit calls, and MEM_PDC calls are always the same width as the OS. |
| 88 | * This means Cxxx boxes can't run wide kernels right now. -PB |
| 89 | * |
| 90 | * CONFIG_PDC_NARROW has been added to allow 64-bit kernels to run on |
| 91 | * systems with 32-bit MEM_PDC calls. This will allow wide kernels to |
| 92 | * run on Cxxx boxes now. -RB |
| 93 | * |
| 94 | * Note that some PAT boxes may have 64-bit IODC I/O... |
| 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 | /** |
| 255 | * pdc_chassis_disp - Updates display |
| 256 | * @retval: -1 on error, 0 on success |
| 257 | * |
| 258 | * Works on old PDC only (E class, others?) |
| 259 | */ |
| 260 | int pdc_chassis_disp(unsigned long disp) |
| 261 | { |
| 262 | int retval = 0; |
| 263 | |
| 264 | spin_lock_irq(&pdc_lock); |
| 265 | retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_DISP, disp); |
| 266 | spin_unlock_irq(&pdc_lock); |
| 267 | |
| 268 | return retval; |
| 269 | } |
| 270 | |
| 271 | /** |
| 272 | * pdc_coproc_cfg - To identify coprocessors attached to the processor. |
| 273 | * @pdc_coproc_info: Return buffer address. |
| 274 | * |
| 275 | * This PDC call returns the presence and status of all the coprocessors |
| 276 | * attached to the processor. |
| 277 | */ |
| 278 | int __init pdc_coproc_cfg(struct pdc_coproc_cfg *pdc_coproc_info) |
| 279 | { |
| 280 | int retval; |
| 281 | |
| 282 | spin_lock_irq(&pdc_lock); |
| 283 | retval = mem_pdc_call(PDC_COPROC, PDC_COPROC_CFG, __pa(pdc_result)); |
| 284 | convert_to_wide(pdc_result); |
| 285 | pdc_coproc_info->ccr_functional = pdc_result[0]; |
| 286 | pdc_coproc_info->ccr_present = pdc_result[1]; |
| 287 | pdc_coproc_info->revision = pdc_result[17]; |
| 288 | pdc_coproc_info->model = pdc_result[18]; |
| 289 | spin_unlock_irq(&pdc_lock); |
| 290 | |
| 291 | return retval; |
| 292 | } |
| 293 | |
| 294 | /** |
| 295 | * pdc_iodc_read - Read data from the modules IODC. |
| 296 | * @actcnt: The actual number of bytes. |
| 297 | * @hpa: The HPA of the module for the iodc read. |
| 298 | * @index: The iodc entry point. |
| 299 | * @iodc_data: A buffer memory for the iodc options. |
| 300 | * @iodc_data_size: Size of the memory buffer. |
| 301 | * |
| 302 | * This PDC call reads from the IODC of the module specified by the hpa |
| 303 | * argument. |
| 304 | */ |
| 305 | int pdc_iodc_read(unsigned long *actcnt, unsigned long hpa, unsigned int index, |
| 306 | void *iodc_data, unsigned int iodc_data_size) |
| 307 | { |
| 308 | int retval; |
| 309 | |
| 310 | spin_lock_irq(&pdc_lock); |
| 311 | retval = mem_pdc_call(PDC_IODC, PDC_IODC_READ, __pa(pdc_result), hpa, |
| 312 | index, __pa(pdc_result2), iodc_data_size); |
| 313 | convert_to_wide(pdc_result); |
| 314 | *actcnt = pdc_result[0]; |
| 315 | memcpy(iodc_data, pdc_result2, iodc_data_size); |
| 316 | spin_unlock_irq(&pdc_lock); |
| 317 | |
| 318 | return retval; |
| 319 | } |
| 320 | EXPORT_SYMBOL(pdc_iodc_read); |
| 321 | |
| 322 | /** |
| 323 | * pdc_system_map_find_mods - Locate unarchitected modules. |
| 324 | * @pdc_mod_info: Return buffer address. |
| 325 | * @mod_path: pointer to dev path structure. |
| 326 | * @mod_index: fixed address module index. |
| 327 | * |
| 328 | * To locate and identify modules which reside at fixed I/O addresses, which |
| 329 | * do not self-identify via architected bus walks. |
| 330 | */ |
| 331 | int pdc_system_map_find_mods(struct pdc_system_map_mod_info *pdc_mod_info, |
| 332 | struct pdc_module_path *mod_path, long mod_index) |
| 333 | { |
| 334 | int retval; |
| 335 | |
| 336 | spin_lock_irq(&pdc_lock); |
| 337 | retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_MODULE, __pa(pdc_result), |
| 338 | __pa(pdc_result2), mod_index); |
| 339 | convert_to_wide(pdc_result); |
| 340 | memcpy(pdc_mod_info, pdc_result, sizeof(*pdc_mod_info)); |
| 341 | memcpy(mod_path, pdc_result2, sizeof(*mod_path)); |
| 342 | spin_unlock_irq(&pdc_lock); |
| 343 | |
| 344 | pdc_mod_info->mod_addr = f_extend(pdc_mod_info->mod_addr); |
| 345 | return retval; |
| 346 | } |
| 347 | |
| 348 | /** |
| 349 | * pdc_system_map_find_addrs - Retrieve additional address ranges. |
| 350 | * @pdc_addr_info: Return buffer address. |
| 351 | * @mod_index: Fixed address module index. |
| 352 | * @addr_index: Address range index. |
| 353 | * |
| 354 | * Retrieve additional information about subsequent address ranges for modules |
| 355 | * with multiple address ranges. |
| 356 | */ |
| 357 | int pdc_system_map_find_addrs(struct pdc_system_map_addr_info *pdc_addr_info, |
| 358 | long mod_index, long addr_index) |
| 359 | { |
| 360 | int retval; |
| 361 | |
| 362 | spin_lock_irq(&pdc_lock); |
| 363 | retval = mem_pdc_call(PDC_SYSTEM_MAP, PDC_FIND_ADDRESS, __pa(pdc_result), |
| 364 | mod_index, addr_index); |
| 365 | convert_to_wide(pdc_result); |
| 366 | memcpy(pdc_addr_info, pdc_result, sizeof(*pdc_addr_info)); |
| 367 | spin_unlock_irq(&pdc_lock); |
| 368 | |
| 369 | pdc_addr_info->mod_addr = f_extend(pdc_addr_info->mod_addr); |
| 370 | return retval; |
| 371 | } |
| 372 | |
| 373 | /** |
| 374 | * pdc_model_info - Return model information about the processor. |
| 375 | * @model: The return buffer. |
| 376 | * |
| 377 | * Returns the version numbers, identifiers, and capabilities from the processor module. |
| 378 | */ |
| 379 | int pdc_model_info(struct pdc_model *model) |
| 380 | { |
| 381 | int retval; |
| 382 | |
| 383 | spin_lock_irq(&pdc_lock); |
| 384 | retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_INFO, __pa(pdc_result), 0); |
| 385 | convert_to_wide(pdc_result); |
| 386 | memcpy(model, pdc_result, sizeof(*model)); |
| 387 | spin_unlock_irq(&pdc_lock); |
| 388 | |
| 389 | return retval; |
| 390 | } |
| 391 | |
| 392 | /** |
| 393 | * pdc_model_sysmodel - Get the system model name. |
| 394 | * @name: A char array of at least 81 characters. |
| 395 | * |
| 396 | * Get system model name from PDC ROM (e.g. 9000/715 or 9000/778/B160L) |
| 397 | */ |
| 398 | int pdc_model_sysmodel(char *name) |
| 399 | { |
| 400 | int retval; |
| 401 | |
| 402 | spin_lock_irq(&pdc_lock); |
| 403 | retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_SYSMODEL, __pa(pdc_result), |
| 404 | OS_ID_HPUX, __pa(name)); |
| 405 | convert_to_wide(pdc_result); |
| 406 | |
| 407 | if (retval == PDC_OK) { |
| 408 | name[pdc_result[0]] = '\0'; /* add trailing '\0' */ |
| 409 | } else { |
| 410 | name[0] = 0; |
| 411 | } |
| 412 | spin_unlock_irq(&pdc_lock); |
| 413 | |
| 414 | return retval; |
| 415 | } |
| 416 | |
| 417 | /** |
| 418 | * pdc_model_versions - Identify the version number of each processor. |
| 419 | * @cpu_id: The return buffer. |
| 420 | * @id: The id of the processor to check. |
| 421 | * |
| 422 | * Returns the version number for each processor component. |
| 423 | * |
| 424 | * This comment was here before, but I do not know what it means :( -RB |
| 425 | * id: 0 = cpu revision, 1 = boot-rom-version |
| 426 | */ |
| 427 | int pdc_model_versions(unsigned long *versions, int id) |
| 428 | { |
| 429 | int retval; |
| 430 | |
| 431 | spin_lock_irq(&pdc_lock); |
| 432 | retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_VERSIONS, __pa(pdc_result), id); |
| 433 | convert_to_wide(pdc_result); |
| 434 | *versions = pdc_result[0]; |
| 435 | spin_unlock_irq(&pdc_lock); |
| 436 | |
| 437 | return retval; |
| 438 | } |
| 439 | |
| 440 | /** |
| 441 | * pdc_model_cpuid - Returns the CPU_ID. |
| 442 | * @cpu_id: The return buffer. |
| 443 | * |
| 444 | * Returns the CPU_ID value which uniquely identifies the cpu portion of |
| 445 | * the processor module. |
| 446 | */ |
| 447 | int pdc_model_cpuid(unsigned long *cpu_id) |
| 448 | { |
| 449 | int retval; |
| 450 | |
| 451 | spin_lock_irq(&pdc_lock); |
| 452 | pdc_result[0] = 0; /* preset zero (call may not be implemented!) */ |
| 453 | retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CPU_ID, __pa(pdc_result), 0); |
| 454 | convert_to_wide(pdc_result); |
| 455 | *cpu_id = pdc_result[0]; |
| 456 | spin_unlock_irq(&pdc_lock); |
| 457 | |
| 458 | return retval; |
| 459 | } |
| 460 | |
| 461 | /** |
| 462 | * pdc_model_capabilities - Returns the platform capabilities. |
| 463 | * @capabilities: The return buffer. |
| 464 | * |
| 465 | * Returns information about platform support for 32- and/or 64-bit |
| 466 | * OSes, IO-PDIR coherency, and virtual aliasing. |
| 467 | */ |
| 468 | int pdc_model_capabilities(unsigned long *capabilities) |
| 469 | { |
| 470 | int retval; |
| 471 | |
| 472 | spin_lock_irq(&pdc_lock); |
| 473 | pdc_result[0] = 0; /* preset zero (call may not be implemented!) */ |
| 474 | retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES, __pa(pdc_result), 0); |
| 475 | convert_to_wide(pdc_result); |
| 476 | *capabilities = pdc_result[0]; |
| 477 | spin_unlock_irq(&pdc_lock); |
| 478 | |
| 479 | return retval; |
| 480 | } |
| 481 | |
| 482 | /** |
| 483 | * pdc_cache_info - Return cache and TLB information. |
| 484 | * @cache_info: The return buffer. |
| 485 | * |
| 486 | * Returns information about the processor's cache and TLB. |
| 487 | */ |
| 488 | int pdc_cache_info(struct pdc_cache_info *cache_info) |
| 489 | { |
| 490 | int retval; |
| 491 | |
| 492 | spin_lock_irq(&pdc_lock); |
| 493 | retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_INFO, __pa(pdc_result), 0); |
| 494 | convert_to_wide(pdc_result); |
| 495 | memcpy(cache_info, pdc_result, sizeof(*cache_info)); |
| 496 | spin_unlock_irq(&pdc_lock); |
| 497 | |
| 498 | return retval; |
| 499 | } |
| 500 | |
| 501 | #ifndef CONFIG_PA20 |
| 502 | /** |
| 503 | * pdc_btlb_info - Return block TLB information. |
| 504 | * @btlb: The return buffer. |
| 505 | * |
| 506 | * Returns information about the hardware Block TLB. |
| 507 | */ |
| 508 | int pdc_btlb_info(struct pdc_btlb_info *btlb) |
| 509 | { |
| 510 | int retval; |
| 511 | |
| 512 | spin_lock_irq(&pdc_lock); |
| 513 | retval = mem_pdc_call(PDC_BLOCK_TLB, PDC_BTLB_INFO, __pa(pdc_result), 0); |
| 514 | memcpy(btlb, pdc_result, sizeof(*btlb)); |
| 515 | spin_unlock_irq(&pdc_lock); |
| 516 | |
| 517 | if(retval < 0) { |
| 518 | btlb->max_size = 0; |
| 519 | } |
| 520 | return retval; |
| 521 | } |
| 522 | |
| 523 | /** |
| 524 | * pdc_mem_map_hpa - Find fixed module information. |
| 525 | * @address: The return buffer |
| 526 | * @mod_path: pointer to dev path structure. |
| 527 | * |
| 528 | * This call was developed for S700 workstations to allow the kernel to find |
| 529 | * the I/O devices (Core I/O). In the future (Kittyhawk and beyond) this |
| 530 | * call will be replaced (on workstations) by the architected PDC_SYSTEM_MAP |
| 531 | * call. |
| 532 | * |
| 533 | * This call is supported by all existing S700 workstations (up to Gecko). |
| 534 | */ |
| 535 | int pdc_mem_map_hpa(struct pdc_memory_map *address, |
| 536 | struct pdc_module_path *mod_path) |
| 537 | { |
| 538 | int retval; |
| 539 | |
| 540 | spin_lock_irq(&pdc_lock); |
| 541 | memcpy(pdc_result2, mod_path, sizeof(*mod_path)); |
| 542 | retval = mem_pdc_call(PDC_MEM_MAP, PDC_MEM_MAP_HPA, __pa(pdc_result), |
| 543 | __pa(pdc_result2)); |
| 544 | memcpy(address, pdc_result, sizeof(*address)); |
| 545 | spin_unlock_irq(&pdc_lock); |
| 546 | |
| 547 | return retval; |
| 548 | } |
| 549 | #endif /* !CONFIG_PA20 */ |
| 550 | |
| 551 | /** |
| 552 | * pdc_lan_station_id - Get the LAN address. |
| 553 | * @lan_addr: The return buffer. |
| 554 | * @hpa: The network device HPA. |
| 555 | * |
| 556 | * Get the LAN station address when it is not directly available from the LAN hardware. |
| 557 | */ |
| 558 | int pdc_lan_station_id(char *lan_addr, unsigned long hpa) |
| 559 | { |
| 560 | int retval; |
| 561 | |
| 562 | spin_lock_irq(&pdc_lock); |
| 563 | retval = mem_pdc_call(PDC_LAN_STATION_ID, PDC_LAN_STATION_ID_READ, |
| 564 | __pa(pdc_result), hpa); |
| 565 | if (retval < 0) { |
| 566 | /* FIXME: else read MAC from NVRAM */ |
| 567 | memset(lan_addr, 0, PDC_LAN_STATION_ID_SIZE); |
| 568 | } else { |
| 569 | memcpy(lan_addr, pdc_result, PDC_LAN_STATION_ID_SIZE); |
| 570 | } |
| 571 | spin_unlock_irq(&pdc_lock); |
| 572 | |
| 573 | return retval; |
| 574 | } |
| 575 | EXPORT_SYMBOL(pdc_lan_station_id); |
| 576 | |
| 577 | /** |
| 578 | * pdc_stable_read - Read data from Stable Storage. |
| 579 | * @staddr: Stable Storage address to access. |
| 580 | * @memaddr: The memory address where Stable Storage data shall be copied. |
| 581 | * @count: number of bytes to transfert. count is multiple of 4. |
| 582 | * |
| 583 | * This PDC call reads from the Stable Storage address supplied in staddr |
| 584 | * and copies count bytes to the memory address memaddr. |
| 585 | * The call will fail if staddr+count > PDC_STABLE size. |
| 586 | */ |
| 587 | int pdc_stable_read(unsigned long staddr, void *memaddr, unsigned long count) |
| 588 | { |
| 589 | int retval; |
| 590 | |
| 591 | spin_lock_irq(&pdc_lock); |
| 592 | retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_READ, staddr, |
| 593 | __pa(pdc_result), count); |
| 594 | convert_to_wide(pdc_result); |
| 595 | memcpy(memaddr, pdc_result, count); |
| 596 | spin_unlock_irq(&pdc_lock); |
| 597 | |
| 598 | return retval; |
| 599 | } |
| 600 | EXPORT_SYMBOL(pdc_stable_read); |
| 601 | |
| 602 | /** |
| 603 | * pdc_stable_write - Write data to Stable Storage. |
| 604 | * @staddr: Stable Storage address to access. |
| 605 | * @memaddr: The memory address where Stable Storage data shall be read from. |
| 606 | * @count: number of bytes to transfert. count is multiple of 4. |
| 607 | * |
| 608 | * This PDC call reads count bytes from the supplied memaddr address, |
| 609 | * and copies count bytes to the Stable Storage address staddr. |
| 610 | * The call will fail if staddr+count > PDC_STABLE size. |
| 611 | */ |
| 612 | int pdc_stable_write(unsigned long staddr, void *memaddr, unsigned long count) |
| 613 | { |
| 614 | int retval; |
| 615 | |
| 616 | spin_lock_irq(&pdc_lock); |
| 617 | memcpy(pdc_result, memaddr, count); |
| 618 | convert_to_wide(pdc_result); |
| 619 | retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_WRITE, staddr, |
| 620 | __pa(pdc_result), count); |
| 621 | spin_unlock_irq(&pdc_lock); |
| 622 | |
| 623 | return retval; |
| 624 | } |
| 625 | EXPORT_SYMBOL(pdc_stable_write); |
| 626 | |
| 627 | /** |
| 628 | * pdc_stable_get_size - Get Stable Storage size in bytes. |
| 629 | * @size: pointer where the size will be stored. |
| 630 | * |
| 631 | * This PDC call returns the number of bytes in the processor's Stable |
| 632 | * Storage, which is the number of contiguous bytes implemented in Stable |
| 633 | * Storage starting from staddr=0. size in an unsigned 64-bit integer |
| 634 | * which is a multiple of four. |
| 635 | */ |
| 636 | int pdc_stable_get_size(unsigned long *size) |
| 637 | { |
| 638 | int retval; |
| 639 | |
| 640 | spin_lock_irq(&pdc_lock); |
| 641 | retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_RETURN_SIZE, __pa(pdc_result)); |
| 642 | *size = pdc_result[0]; |
| 643 | spin_unlock_irq(&pdc_lock); |
| 644 | |
| 645 | return retval; |
| 646 | } |
| 647 | EXPORT_SYMBOL(pdc_stable_get_size); |
| 648 | |
| 649 | /** |
| 650 | * pdc_stable_verify_contents - Checks that Stable Storage contents are valid. |
| 651 | * |
| 652 | * This PDC call is meant to be used to check the integrity of the current |
| 653 | * contents of Stable Storage. |
| 654 | */ |
| 655 | int pdc_stable_verify_contents(void) |
| 656 | { |
| 657 | int retval; |
| 658 | |
| 659 | spin_lock_irq(&pdc_lock); |
| 660 | retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_VERIFY_CONTENTS); |
| 661 | spin_unlock_irq(&pdc_lock); |
| 662 | |
| 663 | return retval; |
| 664 | } |
| 665 | EXPORT_SYMBOL(pdc_stable_verify_contents); |
| 666 | |
| 667 | /** |
| 668 | * pdc_stable_initialize - Sets Stable Storage contents to zero and initialize |
| 669 | * the validity indicator. |
| 670 | * |
| 671 | * This PDC call will erase all contents of Stable Storage. Use with care! |
| 672 | */ |
| 673 | int pdc_stable_initialize(void) |
| 674 | { |
| 675 | int retval; |
| 676 | |
| 677 | spin_lock_irq(&pdc_lock); |
| 678 | retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_INITIALIZE); |
| 679 | spin_unlock_irq(&pdc_lock); |
| 680 | |
| 681 | return retval; |
| 682 | } |
| 683 | EXPORT_SYMBOL(pdc_stable_initialize); |
| 684 | |
| 685 | /** |
| 686 | * pdc_get_initiator - Get the SCSI Interface Card params (SCSI ID, SDTR, SE or LVD) |
| 687 | * @hwpath: fully bc.mod style path to the device. |
| 688 | * @initiator: the array to return the result into |
| 689 | * |
| 690 | * Get the SCSI operational parameters from PDC. |
| 691 | * Needed since HPUX never used BIOS or symbios card NVRAM. |
| 692 | * Most ncr/sym cards won't have an entry and just use whatever |
| 693 | * capabilities of the card are (eg Ultra, LVD). But there are |
| 694 | * several cases where it's useful: |
| 695 | * o set SCSI id for Multi-initiator clusters, |
| 696 | * o cable too long (ie SE scsi 10Mhz won't support 6m length), |
| 697 | * o bus width exported is less than what the interface chip supports. |
| 698 | */ |
| 699 | int pdc_get_initiator(struct hardware_path *hwpath, struct pdc_initiator *initiator) |
| 700 | { |
| 701 | int retval; |
| 702 | |
| 703 | spin_lock_irq(&pdc_lock); |
| 704 | |
| 705 | /* BCJ-XXXX series boxes. E.G. "9000/785/C3000" */ |
| 706 | #define IS_SPROCKETS() (strlen(boot_cpu_data.pdc.sys_model_name) == 14 && \ |
| 707 | strncmp(boot_cpu_data.pdc.sys_model_name, "9000/785", 8) == 0) |
| 708 | |
| 709 | retval = mem_pdc_call(PDC_INITIATOR, PDC_GET_INITIATOR, |
| 710 | __pa(pdc_result), __pa(hwpath)); |
| 711 | if (retval < PDC_OK) |
| 712 | goto out; |
| 713 | |
| 714 | if (pdc_result[0] < 16) { |
| 715 | initiator->host_id = pdc_result[0]; |
| 716 | } else { |
| 717 | initiator->host_id = -1; |
| 718 | } |
| 719 | |
| 720 | /* |
| 721 | * Sprockets and Piranha return 20 or 40 (MT/s). Prelude returns |
| 722 | * 1, 2, 5 or 10 for 5, 10, 20 or 40 MT/s, respectively |
| 723 | */ |
| 724 | switch (pdc_result[1]) { |
| 725 | case 1: initiator->factor = 50; break; |
| 726 | case 2: initiator->factor = 25; break; |
| 727 | case 5: initiator->factor = 12; break; |
| 728 | case 25: initiator->factor = 10; break; |
| 729 | case 20: initiator->factor = 12; break; |
| 730 | case 40: initiator->factor = 10; break; |
| 731 | default: initiator->factor = -1; break; |
| 732 | } |
| 733 | |
| 734 | if (IS_SPROCKETS()) { |
| 735 | initiator->width = pdc_result[4]; |
| 736 | initiator->mode = pdc_result[5]; |
| 737 | } else { |
| 738 | initiator->width = -1; |
| 739 | initiator->mode = -1; |
| 740 | } |
| 741 | |
| 742 | out: |
| 743 | spin_unlock_irq(&pdc_lock); |
| 744 | return (retval >= PDC_OK); |
| 745 | } |
| 746 | EXPORT_SYMBOL(pdc_get_initiator); |
| 747 | |
| 748 | |
| 749 | /** |
| 750 | * pdc_pci_irt_size - Get the number of entries in the interrupt routing table. |
| 751 | * @num_entries: The return value. |
| 752 | * @hpa: The HPA for the device. |
| 753 | * |
| 754 | * This PDC function returns the number of entries in the specified cell's |
| 755 | * interrupt table. |
| 756 | * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes |
| 757 | */ |
| 758 | int pdc_pci_irt_size(unsigned long *num_entries, unsigned long hpa) |
| 759 | { |
| 760 | int retval; |
| 761 | |
| 762 | spin_lock_irq(&pdc_lock); |
| 763 | retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL_SIZE, |
| 764 | __pa(pdc_result), hpa); |
| 765 | convert_to_wide(pdc_result); |
| 766 | *num_entries = pdc_result[0]; |
| 767 | spin_unlock_irq(&pdc_lock); |
| 768 | |
| 769 | return retval; |
| 770 | } |
| 771 | |
| 772 | /** |
| 773 | * pdc_pci_irt - Get the PCI interrupt routing table. |
| 774 | * @num_entries: The number of entries in the table. |
| 775 | * @hpa: The Hard Physical Address of the device. |
| 776 | * @tbl: |
| 777 | * |
| 778 | * Get the PCI interrupt routing table for the device at the given HPA. |
| 779 | * Similar to PDC_PAT stuff - but added for Forte/Allegro boxes |
| 780 | */ |
| 781 | int pdc_pci_irt(unsigned long num_entries, unsigned long hpa, void *tbl) |
| 782 | { |
| 783 | int retval; |
| 784 | |
| 785 | BUG_ON((unsigned long)tbl & 0x7); |
| 786 | |
| 787 | spin_lock_irq(&pdc_lock); |
| 788 | pdc_result[0] = num_entries; |
| 789 | retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL, |
| 790 | __pa(pdc_result), hpa, __pa(tbl)); |
| 791 | spin_unlock_irq(&pdc_lock); |
| 792 | |
| 793 | return retval; |
| 794 | } |
| 795 | |
| 796 | |
| 797 | #if 0 /* UNTEST CODE - left here in case someone needs it */ |
| 798 | |
| 799 | /** |
| 800 | * pdc_pci_config_read - read PCI config space. |
| 801 | * @hpa token from PDC to indicate which PCI device |
| 802 | * @pci_addr configuration space address to read from |
| 803 | * |
| 804 | * Read PCI Configuration space *before* linux PCI subsystem is running. |
| 805 | */ |
| 806 | unsigned int pdc_pci_config_read(void *hpa, unsigned long cfg_addr) |
| 807 | { |
| 808 | int retval; |
| 809 | spin_lock_irq(&pdc_lock); |
| 810 | pdc_result[0] = 0; |
| 811 | pdc_result[1] = 0; |
| 812 | retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_READ_CONFIG, |
| 813 | __pa(pdc_result), hpa, cfg_addr&~3UL, 4UL); |
| 814 | spin_unlock_irq(&pdc_lock); |
| 815 | return retval ? ~0 : (unsigned int) pdc_result[0]; |
| 816 | } |
| 817 | |
| 818 | |
| 819 | /** |
| 820 | * pdc_pci_config_write - read PCI config space. |
| 821 | * @hpa token from PDC to indicate which PCI device |
| 822 | * @pci_addr configuration space address to write |
| 823 | * @val value we want in the 32-bit register |
| 824 | * |
| 825 | * Write PCI Configuration space *before* linux PCI subsystem is running. |
| 826 | */ |
| 827 | void pdc_pci_config_write(void *hpa, unsigned long cfg_addr, unsigned int val) |
| 828 | { |
| 829 | int retval; |
| 830 | spin_lock_irq(&pdc_lock); |
| 831 | pdc_result[0] = 0; |
| 832 | retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_WRITE_CONFIG, |
| 833 | __pa(pdc_result), hpa, |
| 834 | cfg_addr&~3UL, 4UL, (unsigned long) val); |
| 835 | spin_unlock_irq(&pdc_lock); |
| 836 | return retval; |
| 837 | } |
| 838 | #endif /* UNTESTED CODE */ |
| 839 | |
| 840 | /** |
| 841 | * pdc_tod_read - Read the Time-Of-Day clock. |
| 842 | * @tod: The return buffer: |
| 843 | * |
| 844 | * Read the Time-Of-Day clock |
| 845 | */ |
| 846 | int pdc_tod_read(struct pdc_tod *tod) |
| 847 | { |
| 848 | int retval; |
| 849 | |
| 850 | spin_lock_irq(&pdc_lock); |
| 851 | retval = mem_pdc_call(PDC_TOD, PDC_TOD_READ, __pa(pdc_result), 0); |
| 852 | convert_to_wide(pdc_result); |
| 853 | memcpy(tod, pdc_result, sizeof(*tod)); |
| 854 | spin_unlock_irq(&pdc_lock); |
| 855 | |
| 856 | return retval; |
| 857 | } |
| 858 | EXPORT_SYMBOL(pdc_tod_read); |
| 859 | |
| 860 | /** |
| 861 | * pdc_tod_set - Set the Time-Of-Day clock. |
| 862 | * @sec: The number of seconds since epoch. |
| 863 | * @usec: The number of micro seconds. |
| 864 | * |
| 865 | * Set the Time-Of-Day clock. |
| 866 | */ |
| 867 | int pdc_tod_set(unsigned long sec, unsigned long usec) |
| 868 | { |
| 869 | int retval; |
| 870 | |
| 871 | spin_lock_irq(&pdc_lock); |
| 872 | retval = mem_pdc_call(PDC_TOD, PDC_TOD_WRITE, sec, usec); |
| 873 | spin_unlock_irq(&pdc_lock); |
| 874 | |
| 875 | return retval; |
| 876 | } |
| 877 | EXPORT_SYMBOL(pdc_tod_set); |
| 878 | |
| 879 | #ifdef __LP64__ |
| 880 | int pdc_mem_mem_table(struct pdc_memory_table_raddr *r_addr, |
| 881 | struct pdc_memory_table *tbl, unsigned long entries) |
| 882 | { |
| 883 | int retval; |
| 884 | |
| 885 | spin_lock_irq(&pdc_lock); |
| 886 | retval = mem_pdc_call(PDC_MEM, PDC_MEM_TABLE, __pa(pdc_result), __pa(pdc_result2), entries); |
| 887 | convert_to_wide(pdc_result); |
| 888 | memcpy(r_addr, pdc_result, sizeof(*r_addr)); |
| 889 | memcpy(tbl, pdc_result2, entries * sizeof(*tbl)); |
| 890 | spin_unlock_irq(&pdc_lock); |
| 891 | |
| 892 | return retval; |
| 893 | } |
| 894 | #endif /* __LP64__ */ |
| 895 | |
| 896 | /* FIXME: Is this pdc used? I could not find type reference to ftc_bitmap |
| 897 | * so I guessed at unsigned long. Someone who knows what this does, can fix |
| 898 | * it later. :) |
| 899 | */ |
| 900 | int pdc_do_firm_test_reset(unsigned long ftc_bitmap) |
| 901 | { |
| 902 | int retval; |
| 903 | |
| 904 | spin_lock_irq(&pdc_lock); |
| 905 | retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_FIRM_TEST_RESET, |
| 906 | PDC_FIRM_TEST_MAGIC, ftc_bitmap); |
| 907 | spin_unlock_irq(&pdc_lock); |
| 908 | |
| 909 | return retval; |
| 910 | } |
| 911 | |
| 912 | /* |
| 913 | * pdc_do_reset - Reset the system. |
| 914 | * |
| 915 | * Reset the system. |
| 916 | */ |
| 917 | int pdc_do_reset(void) |
| 918 | { |
| 919 | int retval; |
| 920 | |
| 921 | spin_lock_irq(&pdc_lock); |
| 922 | retval = mem_pdc_call(PDC_BROADCAST_RESET, PDC_DO_RESET); |
| 923 | spin_unlock_irq(&pdc_lock); |
| 924 | |
| 925 | return retval; |
| 926 | } |
| 927 | |
| 928 | /* |
| 929 | * pdc_soft_power_info - Enable soft power switch. |
| 930 | * @power_reg: address of soft power register |
| 931 | * |
| 932 | * Return the absolute address of the soft power switch register |
| 933 | */ |
| 934 | int __init pdc_soft_power_info(unsigned long *power_reg) |
| 935 | { |
| 936 | int retval; |
| 937 | |
| 938 | *power_reg = (unsigned long) (-1); |
| 939 | |
| 940 | spin_lock_irq(&pdc_lock); |
| 941 | retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_INFO, __pa(pdc_result), 0); |
| 942 | if (retval == PDC_OK) { |
| 943 | convert_to_wide(pdc_result); |
| 944 | *power_reg = f_extend(pdc_result[0]); |
| 945 | } |
| 946 | spin_unlock_irq(&pdc_lock); |
| 947 | |
| 948 | return retval; |
| 949 | } |
| 950 | |
| 951 | /* |
| 952 | * pdc_soft_power_button - Control the soft power button behaviour |
| 953 | * @sw_control: 0 for hardware control, 1 for software control |
| 954 | * |
| 955 | * |
| 956 | * This PDC function places the soft power button under software or |
| 957 | * hardware control. |
| 958 | * Under software control the OS may control to when to allow to shut |
| 959 | * down the system. Under hardware control pressing the power button |
| 960 | * powers off the system immediately. |
| 961 | */ |
| 962 | int pdc_soft_power_button(int sw_control) |
| 963 | { |
| 964 | int retval; |
| 965 | spin_lock_irq(&pdc_lock); |
| 966 | retval = mem_pdc_call(PDC_SOFT_POWER, PDC_SOFT_POWER_ENABLE, __pa(pdc_result), sw_control); |
| 967 | spin_unlock_irq(&pdc_lock); |
| 968 | return retval; |
| 969 | } |
| 970 | |
| 971 | /* |
| 972 | * pdc_io_reset - Hack to avoid overlapping range registers of Bridges devices. |
| 973 | * Primarily a problem on T600 (which parisc-linux doesn't support) but |
| 974 | * who knows what other platform firmware might do with this OS "hook". |
| 975 | */ |
| 976 | void pdc_io_reset(void) |
| 977 | { |
| 978 | spin_lock_irq(&pdc_lock); |
| 979 | mem_pdc_call(PDC_IO, PDC_IO_RESET, 0); |
| 980 | spin_unlock_irq(&pdc_lock); |
| 981 | } |
| 982 | |
| 983 | /* |
| 984 | * pdc_io_reset_devices - Hack to Stop USB controller |
| 985 | * |
| 986 | * If PDC used the usb controller, the usb controller |
| 987 | * is still running and will crash the machines during iommu |
| 988 | * setup, because of still running DMA. This PDC call |
| 989 | * stops the USB controller. |
| 990 | * Normally called after calling pdc_io_reset(). |
| 991 | */ |
| 992 | void pdc_io_reset_devices(void) |
| 993 | { |
| 994 | spin_lock_irq(&pdc_lock); |
| 995 | mem_pdc_call(PDC_IO, PDC_IO_RESET_DEVICES, 0); |
| 996 | spin_unlock_irq(&pdc_lock); |
| 997 | } |
| 998 | |
| 999 | |
| 1000 | /** |
| 1001 | * pdc_iodc_putc - Console character print using IODC. |
| 1002 | * @c: the character to output. |
| 1003 | * |
| 1004 | * Note that only these special chars are architected for console IODC io: |
| 1005 | * BEL, BS, CR, and LF. Others are passed through. |
| 1006 | * Since the HP console requires CR+LF to perform a 'newline', we translate |
| 1007 | * "\n" to "\r\n". |
| 1008 | */ |
| 1009 | void pdc_iodc_putc(unsigned char c) |
| 1010 | { |
| 1011 | /* XXX Should we spinlock posx usage */ |
| 1012 | static int posx; /* for simple TAB-Simulation... */ |
| 1013 | static int __attribute__((aligned(8))) iodc_retbuf[32]; |
| 1014 | static char __attribute__((aligned(64))) iodc_dbuf[4096]; |
| 1015 | unsigned int n; |
| 1016 | unsigned int flags; |
| 1017 | |
| 1018 | switch (c) { |
| 1019 | case '\n': |
| 1020 | iodc_dbuf[0] = '\r'; |
| 1021 | iodc_dbuf[1] = '\n'; |
| 1022 | n = 2; |
| 1023 | posx = 0; |
| 1024 | break; |
| 1025 | case '\t': |
| 1026 | pdc_iodc_putc(' '); |
| 1027 | while (posx & 7) /* expand TAB */ |
| 1028 | pdc_iodc_putc(' '); |
| 1029 | return; /* return since IODC can't handle this */ |
| 1030 | case '\b': |
| 1031 | posx-=2; /* BS */ |
| 1032 | default: |
| 1033 | iodc_dbuf[0] = c; |
| 1034 | n = 1; |
| 1035 | posx++; |
| 1036 | break; |
| 1037 | } |
| 1038 | |
| 1039 | spin_lock_irqsave(&pdc_lock, flags); |
| 1040 | real32_call(PAGE0->mem_cons.iodc_io, |
| 1041 | (unsigned long)PAGE0->mem_cons.hpa, ENTRY_IO_COUT, |
| 1042 | PAGE0->mem_cons.spa, __pa(PAGE0->mem_cons.dp.layers), |
| 1043 | __pa(iodc_retbuf), 0, __pa(iodc_dbuf), n, 0); |
| 1044 | spin_unlock_irqrestore(&pdc_lock, flags); |
| 1045 | } |
| 1046 | |
| 1047 | /** |
| 1048 | * pdc_iodc_outc - Console character print using IODC (without conversions). |
| 1049 | * @c: the character to output. |
| 1050 | * |
| 1051 | * Write the character directly to the IODC console. |
| 1052 | */ |
| 1053 | void pdc_iodc_outc(unsigned char c) |
| 1054 | { |
| 1055 | unsigned int n, flags; |
| 1056 | |
| 1057 | /* fill buffer with one caracter and print it */ |
| 1058 | static int __attribute__((aligned(8))) iodc_retbuf[32]; |
| 1059 | static char __attribute__((aligned(64))) iodc_dbuf[4096]; |
| 1060 | |
| 1061 | n = 1; |
| 1062 | iodc_dbuf[0] = c; |
| 1063 | |
| 1064 | spin_lock_irqsave(&pdc_lock, flags); |
| 1065 | real32_call(PAGE0->mem_cons.iodc_io, |
| 1066 | (unsigned long)PAGE0->mem_cons.hpa, ENTRY_IO_COUT, |
| 1067 | PAGE0->mem_cons.spa, __pa(PAGE0->mem_cons.dp.layers), |
| 1068 | __pa(iodc_retbuf), 0, __pa(iodc_dbuf), n, 0); |
| 1069 | spin_unlock_irqrestore(&pdc_lock, flags); |
| 1070 | } |
| 1071 | |
| 1072 | /** |
| 1073 | * pdc_iodc_getc - Read a character (non-blocking) from the PDC console. |
| 1074 | * |
| 1075 | * Read a character (non-blocking) from the PDC console, returns -1 if |
| 1076 | * key is not present. |
| 1077 | */ |
| 1078 | int pdc_iodc_getc(void) |
| 1079 | { |
| 1080 | unsigned int flags; |
| 1081 | static int __attribute__((aligned(8))) iodc_retbuf[32]; |
| 1082 | static char __attribute__((aligned(64))) iodc_dbuf[4096]; |
| 1083 | int ch; |
| 1084 | int status; |
| 1085 | |
| 1086 | /* Bail if no console input device. */ |
| 1087 | if (!PAGE0->mem_kbd.iodc_io) |
| 1088 | return 0; |
| 1089 | |
| 1090 | /* wait for a keyboard (rs232)-input */ |
| 1091 | spin_lock_irqsave(&pdc_lock, flags); |
| 1092 | real32_call(PAGE0->mem_kbd.iodc_io, |
| 1093 | (unsigned long)PAGE0->mem_kbd.hpa, ENTRY_IO_CIN, |
| 1094 | PAGE0->mem_kbd.spa, __pa(PAGE0->mem_kbd.dp.layers), |
| 1095 | __pa(iodc_retbuf), 0, __pa(iodc_dbuf), 1, 0); |
| 1096 | |
| 1097 | ch = *iodc_dbuf; |
| 1098 | status = *iodc_retbuf; |
| 1099 | spin_unlock_irqrestore(&pdc_lock, flags); |
| 1100 | |
| 1101 | if (status == 0) |
| 1102 | return -1; |
| 1103 | |
| 1104 | return ch; |
| 1105 | } |
| 1106 | |
| 1107 | int pdc_sti_call(unsigned long func, unsigned long flags, |
| 1108 | unsigned long inptr, unsigned long outputr, |
| 1109 | unsigned long glob_cfg) |
| 1110 | { |
| 1111 | int retval; |
| 1112 | |
| 1113 | spin_lock_irq(&pdc_lock); |
| 1114 | retval = real32_call(func, flags, inptr, outputr, glob_cfg); |
| 1115 | spin_unlock_irq(&pdc_lock); |
| 1116 | |
| 1117 | return retval; |
| 1118 | } |
| 1119 | EXPORT_SYMBOL(pdc_sti_call); |
| 1120 | |
| 1121 | #ifdef __LP64__ |
| 1122 | /** |
| 1123 | * pdc_pat_cell_get_number - Returns the cell number. |
| 1124 | * @cell_info: The return buffer. |
| 1125 | * |
| 1126 | * This PDC call returns the cell number of the cell from which the call |
| 1127 | * is made. |
| 1128 | */ |
| 1129 | int pdc_pat_cell_get_number(struct pdc_pat_cell_num *cell_info) |
| 1130 | { |
| 1131 | int retval; |
| 1132 | |
| 1133 | spin_lock_irq(&pdc_lock); |
| 1134 | retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_GET_NUMBER, __pa(pdc_result)); |
| 1135 | memcpy(cell_info, pdc_result, sizeof(*cell_info)); |
| 1136 | spin_unlock_irq(&pdc_lock); |
| 1137 | |
| 1138 | return retval; |
| 1139 | } |
| 1140 | |
| 1141 | /** |
| 1142 | * pdc_pat_cell_module - Retrieve the cell's module information. |
| 1143 | * @actcnt: The number of bytes written to mem_addr. |
| 1144 | * @ploc: The physical location. |
| 1145 | * @mod: The module index. |
| 1146 | * @view_type: The view of the address type. |
| 1147 | * @mem_addr: The return buffer. |
| 1148 | * |
| 1149 | * This PDC call returns information about each module attached to the cell |
| 1150 | * at the specified location. |
| 1151 | */ |
| 1152 | int pdc_pat_cell_module(unsigned long *actcnt, unsigned long ploc, unsigned long mod, |
| 1153 | unsigned long view_type, void *mem_addr) |
| 1154 | { |
| 1155 | int retval; |
| 1156 | static struct pdc_pat_cell_mod_maddr_block result __attribute__ ((aligned (8))); |
| 1157 | |
| 1158 | spin_lock_irq(&pdc_lock); |
| 1159 | retval = mem_pdc_call(PDC_PAT_CELL, PDC_PAT_CELL_MODULE, __pa(pdc_result), |
| 1160 | ploc, mod, view_type, __pa(&result)); |
| 1161 | if(!retval) { |
| 1162 | *actcnt = pdc_result[0]; |
| 1163 | memcpy(mem_addr, &result, *actcnt); |
| 1164 | } |
| 1165 | spin_unlock_irq(&pdc_lock); |
| 1166 | |
| 1167 | return retval; |
| 1168 | } |
| 1169 | |
| 1170 | /** |
| 1171 | * pdc_pat_cpu_get_number - Retrieve the cpu number. |
| 1172 | * @cpu_info: The return buffer. |
| 1173 | * @hpa: The Hard Physical Address of the CPU. |
| 1174 | * |
| 1175 | * Retrieve the cpu number for the cpu at the specified HPA. |
| 1176 | */ |
| 1177 | int pdc_pat_cpu_get_number(struct pdc_pat_cpu_num *cpu_info, void *hpa) |
| 1178 | { |
| 1179 | int retval; |
| 1180 | |
| 1181 | spin_lock_irq(&pdc_lock); |
| 1182 | retval = mem_pdc_call(PDC_PAT_CPU, PDC_PAT_CPU_GET_NUMBER, |
| 1183 | __pa(&pdc_result), hpa); |
| 1184 | memcpy(cpu_info, pdc_result, sizeof(*cpu_info)); |
| 1185 | spin_unlock_irq(&pdc_lock); |
| 1186 | |
| 1187 | return retval; |
| 1188 | } |
| 1189 | |
| 1190 | /** |
| 1191 | * pdc_pat_get_irt_size - Retrieve the number of entries in the cell's interrupt table. |
| 1192 | * @num_entries: The return value. |
| 1193 | * @cell_num: The target cell. |
| 1194 | * |
| 1195 | * This PDC function returns the number of entries in the specified cell's |
| 1196 | * interrupt table. |
| 1197 | */ |
| 1198 | int pdc_pat_get_irt_size(unsigned long *num_entries, unsigned long cell_num) |
| 1199 | { |
| 1200 | int retval; |
| 1201 | |
| 1202 | spin_lock_irq(&pdc_lock); |
| 1203 | retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE_SIZE, |
| 1204 | __pa(pdc_result), cell_num); |
| 1205 | *num_entries = pdc_result[0]; |
| 1206 | spin_unlock_irq(&pdc_lock); |
| 1207 | |
| 1208 | return retval; |
| 1209 | } |
| 1210 | |
| 1211 | /** |
| 1212 | * pdc_pat_get_irt - Retrieve the cell's interrupt table. |
| 1213 | * @r_addr: The return buffer. |
| 1214 | * @cell_num: The target cell. |
| 1215 | * |
| 1216 | * This PDC function returns the actual interrupt table for the specified cell. |
| 1217 | */ |
| 1218 | int pdc_pat_get_irt(void *r_addr, unsigned long cell_num) |
| 1219 | { |
| 1220 | int retval; |
| 1221 | |
| 1222 | spin_lock_irq(&pdc_lock); |
| 1223 | retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_GET_PCI_ROUTING_TABLE, |
| 1224 | __pa(r_addr), cell_num); |
| 1225 | spin_unlock_irq(&pdc_lock); |
| 1226 | |
| 1227 | return retval; |
| 1228 | } |
| 1229 | |
| 1230 | /** |
| 1231 | * pdc_pat_pd_get_addr_map - Retrieve information about memory address ranges. |
| 1232 | * @actlen: The return buffer. |
| 1233 | * @mem_addr: Pointer to the memory buffer. |
| 1234 | * @count: The number of bytes to read from the buffer. |
| 1235 | * @offset: The offset with respect to the beginning of the buffer. |
| 1236 | * |
| 1237 | */ |
| 1238 | int pdc_pat_pd_get_addr_map(unsigned long *actual_len, void *mem_addr, |
| 1239 | unsigned long count, unsigned long offset) |
| 1240 | { |
| 1241 | int retval; |
| 1242 | |
| 1243 | spin_lock_irq(&pdc_lock); |
| 1244 | retval = mem_pdc_call(PDC_PAT_PD, PDC_PAT_PD_GET_ADDR_MAP, __pa(pdc_result), |
| 1245 | __pa(pdc_result2), count, offset); |
| 1246 | *actual_len = pdc_result[0]; |
| 1247 | memcpy(mem_addr, pdc_result2, *actual_len); |
| 1248 | spin_unlock_irq(&pdc_lock); |
| 1249 | |
| 1250 | return retval; |
| 1251 | } |
| 1252 | |
| 1253 | /** |
| 1254 | * pdc_pat_io_pci_cfg_read - Read PCI configuration space. |
| 1255 | * @pci_addr: PCI configuration space address for which the read request is being made. |
| 1256 | * @pci_size: Size of read in bytes. Valid values are 1, 2, and 4. |
| 1257 | * @mem_addr: Pointer to return memory buffer. |
| 1258 | * |
| 1259 | */ |
| 1260 | int pdc_pat_io_pci_cfg_read(unsigned long pci_addr, int pci_size, u32 *mem_addr) |
| 1261 | { |
| 1262 | int retval; |
| 1263 | spin_lock_irq(&pdc_lock); |
| 1264 | retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_READ, |
| 1265 | __pa(pdc_result), pci_addr, pci_size); |
| 1266 | switch(pci_size) { |
| 1267 | case 1: *(u8 *) mem_addr = (u8) pdc_result[0]; |
| 1268 | case 2: *(u16 *)mem_addr = (u16) pdc_result[0]; |
| 1269 | case 4: *(u32 *)mem_addr = (u32) pdc_result[0]; |
| 1270 | } |
| 1271 | spin_unlock_irq(&pdc_lock); |
| 1272 | |
| 1273 | return retval; |
| 1274 | } |
| 1275 | |
| 1276 | /** |
| 1277 | * pdc_pat_io_pci_cfg_write - Retrieve information about memory address ranges. |
| 1278 | * @pci_addr: PCI configuration space address for which the write request is being made. |
| 1279 | * @pci_size: Size of write in bytes. Valid values are 1, 2, and 4. |
| 1280 | * @value: Pointer to 1, 2, or 4 byte value in low order end of argument to be |
| 1281 | * written to PCI Config space. |
| 1282 | * |
| 1283 | */ |
| 1284 | int pdc_pat_io_pci_cfg_write(unsigned long pci_addr, int pci_size, u32 val) |
| 1285 | { |
| 1286 | int retval; |
| 1287 | |
| 1288 | spin_lock_irq(&pdc_lock); |
| 1289 | retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_WRITE, |
| 1290 | pci_addr, pci_size, val); |
| 1291 | spin_unlock_irq(&pdc_lock); |
| 1292 | |
| 1293 | return retval; |
| 1294 | } |
| 1295 | #endif /* __LP64__ */ |
| 1296 | |
| 1297 | |
| 1298 | /***************** 32-bit real-mode calls ***********/ |
| 1299 | /* The struct below is used |
| 1300 | * to overlay real_stack (real2.S), preparing a 32-bit call frame. |
| 1301 | * real32_call_asm() then uses this stack in narrow real mode |
| 1302 | */ |
| 1303 | |
| 1304 | struct narrow_stack { |
| 1305 | /* use int, not long which is 64 bits */ |
| 1306 | unsigned int arg13; |
| 1307 | unsigned int arg12; |
| 1308 | unsigned int arg11; |
| 1309 | unsigned int arg10; |
| 1310 | unsigned int arg9; |
| 1311 | unsigned int arg8; |
| 1312 | unsigned int arg7; |
| 1313 | unsigned int arg6; |
| 1314 | unsigned int arg5; |
| 1315 | unsigned int arg4; |
| 1316 | unsigned int arg3; |
| 1317 | unsigned int arg2; |
| 1318 | unsigned int arg1; |
| 1319 | unsigned int arg0; |
| 1320 | unsigned int frame_marker[8]; |
| 1321 | unsigned int sp; |
| 1322 | /* in reality, there's nearly 8k of stack after this */ |
| 1323 | }; |
| 1324 | |
| 1325 | long real32_call(unsigned long fn, ...) |
| 1326 | { |
| 1327 | va_list args; |
| 1328 | extern struct narrow_stack real_stack; |
| 1329 | extern unsigned long real32_call_asm(unsigned int *, |
| 1330 | unsigned int *, |
| 1331 | unsigned int); |
| 1332 | |
| 1333 | va_start(args, fn); |
| 1334 | real_stack.arg0 = va_arg(args, unsigned int); |
| 1335 | real_stack.arg1 = va_arg(args, unsigned int); |
| 1336 | real_stack.arg2 = va_arg(args, unsigned int); |
| 1337 | real_stack.arg3 = va_arg(args, unsigned int); |
| 1338 | real_stack.arg4 = va_arg(args, unsigned int); |
| 1339 | real_stack.arg5 = va_arg(args, unsigned int); |
| 1340 | real_stack.arg6 = va_arg(args, unsigned int); |
| 1341 | real_stack.arg7 = va_arg(args, unsigned int); |
| 1342 | real_stack.arg8 = va_arg(args, unsigned int); |
| 1343 | real_stack.arg9 = va_arg(args, unsigned int); |
| 1344 | real_stack.arg10 = va_arg(args, unsigned int); |
| 1345 | real_stack.arg11 = va_arg(args, unsigned int); |
| 1346 | real_stack.arg12 = va_arg(args, unsigned int); |
| 1347 | real_stack.arg13 = va_arg(args, unsigned int); |
| 1348 | va_end(args); |
| 1349 | |
| 1350 | return real32_call_asm(&real_stack.sp, &real_stack.arg0, fn); |
| 1351 | } |
| 1352 | |
| 1353 | #ifdef __LP64__ |
| 1354 | /***************** 64-bit real-mode calls ***********/ |
| 1355 | |
| 1356 | struct wide_stack { |
| 1357 | unsigned long arg0; |
| 1358 | unsigned long arg1; |
| 1359 | unsigned long arg2; |
| 1360 | unsigned long arg3; |
| 1361 | unsigned long arg4; |
| 1362 | unsigned long arg5; |
| 1363 | unsigned long arg6; |
| 1364 | unsigned long arg7; |
| 1365 | unsigned long arg8; |
| 1366 | unsigned long arg9; |
| 1367 | unsigned long arg10; |
| 1368 | unsigned long arg11; |
| 1369 | unsigned long arg12; |
| 1370 | unsigned long arg13; |
| 1371 | unsigned long frame_marker[2]; /* rp, previous sp */ |
| 1372 | unsigned long sp; |
| 1373 | /* in reality, there's nearly 8k of stack after this */ |
| 1374 | }; |
| 1375 | |
| 1376 | long real64_call(unsigned long fn, ...) |
| 1377 | { |
| 1378 | va_list args; |
| 1379 | extern struct wide_stack real64_stack; |
| 1380 | extern unsigned long real64_call_asm(unsigned long *, |
| 1381 | unsigned long *, |
| 1382 | unsigned long); |
| 1383 | |
| 1384 | va_start(args, fn); |
| 1385 | real64_stack.arg0 = va_arg(args, unsigned long); |
| 1386 | real64_stack.arg1 = va_arg(args, unsigned long); |
| 1387 | real64_stack.arg2 = va_arg(args, unsigned long); |
| 1388 | real64_stack.arg3 = va_arg(args, unsigned long); |
| 1389 | real64_stack.arg4 = va_arg(args, unsigned long); |
| 1390 | real64_stack.arg5 = va_arg(args, unsigned long); |
| 1391 | real64_stack.arg6 = va_arg(args, unsigned long); |
| 1392 | real64_stack.arg7 = va_arg(args, unsigned long); |
| 1393 | real64_stack.arg8 = va_arg(args, unsigned long); |
| 1394 | real64_stack.arg9 = va_arg(args, unsigned long); |
| 1395 | real64_stack.arg10 = va_arg(args, unsigned long); |
| 1396 | real64_stack.arg11 = va_arg(args, unsigned long); |
| 1397 | real64_stack.arg12 = va_arg(args, unsigned long); |
| 1398 | real64_stack.arg13 = va_arg(args, unsigned long); |
| 1399 | va_end(args); |
| 1400 | |
| 1401 | return real64_call_asm(&real64_stack.sp, &real64_stack.arg0, fn); |
| 1402 | } |
| 1403 | |
| 1404 | #endif /* __LP64__ */ |
| 1405 | |