git.oblomov.eu Git - linux-2.6/blob - arch/ia64/kernel/palinfo.c

   1 /*
   2  * palinfo.c
   3  *
   4  * Prints processor specific information reported by PAL.
   5  * This code is based on specification of PAL as of the
   6  * Intel IA-64 Architecture Software Developer's Manual v1.0.
   7  *
   8  *
   9  * Copyright (C) 2000-2001, 2003 Hewlett-Packard Co
  10  *      Stephane Eranian <eranian@hpl.hp.com>
  11  * Copyright (C) 2004 Intel Corporation
  12  *  Ashok Raj <ashok.raj@intel.com>
  13  *
  14  * 05/26/2000   S.Eranian       initial release
  15  * 08/21/2000   S.Eranian       updated to July 2000 PAL specs
  16  * 02/05/2001   S.Eranian       fixed module support
  17  * 10/23/2001   S.Eranian       updated pal_perf_mon_info bug fixes
  18  * 03/24/2004   Ashok Raj       updated to work with CPU Hotplug
  19  * 10/26/2006   Russ Anderson   updated processor features to rev 2.2 spec
  20  */
  21 #include <linux/types.h>
  22 #include <linux/errno.h>
  23 #include <linux/init.h>
  24 #include <linux/proc_fs.h>
  25 #include <linux/mm.h>
  26 #include <linux/module.h>
  27 #include <linux/efi.h>
  28 #include <linux/notifier.h>
  29 #include <linux/cpu.h>
  30 #include <linux/cpumask.h>
  31
  32 #include <asm/pal.h>
  33 #include <asm/sal.h>
  34 #include <asm/page.h>
  35 #include <asm/processor.h>
  36 #include <linux/smp.h>
  37
  38 MODULE_AUTHOR("Stephane Eranian <eranian@hpl.hp.com>");
  39 MODULE_DESCRIPTION("/proc interface to IA-64 PAL");
  40 MODULE_LICENSE("GPL");
  41
  42 #define PALINFO_VERSION "0.5"
  43
  44 typedef int (*palinfo_func_t)(char*);
  45
  46 typedef struct {
  47         const char              *name;          /* name of the proc entry */
  48         palinfo_func_t          proc_read;      /* function to call for reading */
  49         struct proc_dir_entry   *entry;         /* registered entry (removal) */
  50 } palinfo_entry_t;
  51
  52
  53 /*
  54  *  A bunch of string array to get pretty printing
  55  */
  56
  57 static char *cache_types[] = {
  58         "",                     /* not used */
  59         "Instruction",
  60         "Data",
  61         "Data/Instruction"      /* unified */
  62 };
  63
  64 static const char *cache_mattrib[]={
  65         "WriteThrough",
  66         "WriteBack",
  67         "",             /* reserved */
  68         ""              /* reserved */
  69 };
  70
  71 static const char *cache_st_hints[]={
  72         "Temporal, level 1",
  73         "Reserved",
  74         "Reserved",
  75         "Non-temporal, all levels",
  76         "Reserved",
  77         "Reserved",
  78         "Reserved",
  79         "Reserved"
  80 };
  81
  82 static const char *cache_ld_hints[]={
  83         "Temporal, level 1",
  84         "Non-temporal, level 1",
  85         "Reserved",
  86         "Non-temporal, all levels",
  87         "Reserved",
  88         "Reserved",
  89         "Reserved",
  90         "Reserved"
  91 };
  92
  93 static const char *rse_hints[]={
  94         "enforced lazy",
  95         "eager stores",
  96         "eager loads",
  97         "eager loads and stores"
  98 };
  99
 100 #define RSE_HINTS_COUNT ARRAY_SIZE(rse_hints)
 101
 102 static const char *mem_attrib[]={
 103         "WB",           /* 000 */
 104         "SW",           /* 001 */
 105         "010",          /* 010 */
 106         "011",          /* 011 */
 107         "UC",           /* 100 */
 108         "UCE",          /* 101 */
 109         "WC",           /* 110 */
 110         "NaTPage"       /* 111 */
 111 };
 112
 113 /*
 114  * Take a 64bit vector and produces a string such that
 115  * if bit n is set then 2^n in clear text is generated. The adjustment
 116  * to the right unit is also done.
 117  *
 118  * Input:
 119  *      - a pointer to a buffer to hold the string
 120  *      - a 64-bit vector
 121  * Ouput:
 122  *      - a pointer to the end of the buffer
 123  *
 124  */
 125 static char *
 126 bitvector_process(char *p, u64 vector)
 127 {
 128         int i,j;
 129         const char *units[]={ "", "K", "M", "G", "T" };
 130
 131         for (i=0, j=0; i < 64; i++ , j=i/10) {
 132                 if (vector & 0x1) {
 133                         p += sprintf(p, "%d%s ", 1 << (i-j*10), units[j]);
 134                 }
 135                 vector >>= 1;
 136         }
 137         return p;
 138 }
 139
 140 /*
 141  * Take a 64bit vector and produces a string such that
 142  * if bit n is set then register n is present. The function
 143  * takes into account consecutive registers and prints out ranges.
 144  *
 145  * Input:
 146  *      - a pointer to a buffer to hold the string
 147  *      - a 64-bit vector
 148  * Ouput:
 149  *      - a pointer to the end of the buffer
 150  *
 151  */
 152 static char *
 153 bitregister_process(char *p, u64 *reg_info, int max)
 154 {
 155         int i, begin, skip = 0;
 156         u64 value = reg_info[0];
 157
 158         value >>= i = begin = ffs(value) - 1;
 159
 160         for(; i < max; i++ ) {
 161
 162                 if (i != 0 && (i%64) == 0) value = *++reg_info;
 163
 164                 if ((value & 0x1) == 0 && skip == 0) {
 165                         if (begin  <= i - 2)
 166                                 p += sprintf(p, "%d-%d ", begin, i-1);
 167                         else
 168                                 p += sprintf(p, "%d ", i-1);
 169                         skip  = 1;
 170                         begin = -1;
 171                 } else if ((value & 0x1) && skip == 1) {
 172                         skip = 0;
 173                         begin = i;
 174                 }
 175                 value >>=1;
 176         }
 177         if (begin > -1) {
 178                 if (begin < 127)
 179                         p += sprintf(p, "%d-127", begin);
 180                 else
 181                         p += sprintf(p, "127");
 182         }
 183
 184         return p;
 185 }
 186
 187 static int
 188 power_info(char *page)
 189 {
 190         s64 status;
 191         char *p = page;
 192         u64 halt_info_buffer[8];
 193         pal_power_mgmt_info_u_t *halt_info =(pal_power_mgmt_info_u_t *)halt_info_buffer;
 194         int i;
 195
 196         status = ia64_pal_halt_info(halt_info);
 197         if (status != 0) return 0;
 198
 199         for (i=0; i < 8 ; i++ ) {
 200                 if (halt_info[i].pal_power_mgmt_info_s.im == 1) {
 201                         p += sprintf(p, "Power level %d:\n"
 202                                      "\tentry_latency       : %d cycles\n"
 203                                      "\texit_latency        : %d cycles\n"
 204                                      "\tpower consumption   : %d mW\n"
 205                                      "\tCache+TLB coherency : %s\n", i,
 206                                      halt_info[i].pal_power_mgmt_info_s.entry_latency,
 207                                      halt_info[i].pal_power_mgmt_info_s.exit_latency,
 208                                      halt_info[i].pal_power_mgmt_info_s.power_consumption,
 209                                      halt_info[i].pal_power_mgmt_info_s.co ? "Yes" : "No");
 210                 } else {
 211                         p += sprintf(p,"Power level %d: not implemented\n",i);
 212                 }
 213         }
 214         return p - page;
 215 }
 216
 217 static int
 218 cache_info(char *page)
 219 {
 220         char *p = page;
 221         u64 i, levels, unique_caches;
 222         pal_cache_config_info_t cci;
 223         int j, k;
 224         s64 status;
 225
 226         if ((status = ia64_pal_cache_summary(&levels, &unique_caches)) != 0) {
 227                 printk(KERN_ERR "ia64_pal_cache_summary=%ld\n", status);
 228                 return 0;
 229         }
 230
 231         p += sprintf(p, "Cache levels  : %ld\nUnique caches : %ld\n\n", levels, unique_caches);
 232
 233         for (i=0; i < levels; i++) {
 234
 235                 for (j=2; j >0 ; j--) {
 236
 237                         /* even without unification some level may not be present */
 238                         if ((status=ia64_pal_cache_config_info(i,j, &cci)) != 0) {
 239                                 continue;
 240                         }
 241                         p += sprintf(p,
 242                                      "%s Cache level %lu:\n"
 243                                      "\tSize           : %u bytes\n"
 244                                      "\tAttributes     : ",
 245                                      cache_types[j+cci.pcci_unified], i+1,
 246                                      cci.pcci_cache_size);
 247
 248                         if (cci.pcci_unified) p += sprintf(p, "Unified ");
 249
 250                         p += sprintf(p, "%s\n", cache_mattrib[cci.pcci_cache_attr]);
 251
 252                         p += sprintf(p,
 253                                      "\tAssociativity  : %d\n"
 254                                      "\tLine size      : %d bytes\n"
 255                                      "\tStride         : %d bytes\n",
 256                                      cci.pcci_assoc, 1<<cci.pcci_line_size, 1<<cci.pcci_stride);
 257                         if (j == 1)
 258                                 p += sprintf(p, "\tStore latency  : N/A\n");
 259                         else
 260                                 p += sprintf(p, "\tStore latency  : %d cycle(s)\n",
 261                                                 cci.pcci_st_latency);
 262
 263                         p += sprintf(p,
 264                                      "\tLoad latency   : %d cycle(s)\n"
 265                                      "\tStore hints    : ", cci.pcci_ld_latency);
 266
 267                         for(k=0; k < 8; k++ ) {
 268                                 if ( cci.pcci_st_hints & 0x1)
 269                                         p += sprintf(p, "[%s]", cache_st_hints[k]);
 270                                 cci.pcci_st_hints >>=1;
 271                         }
 272                         p += sprintf(p, "\n\tLoad hints     : ");
 273
 274                         for(k=0; k < 8; k++ ) {
 275                                 if (cci.pcci_ld_hints & 0x1)
 276                                         p += sprintf(p, "[%s]", cache_ld_hints[k]);
 277                                 cci.pcci_ld_hints >>=1;
 278                         }
 279                         p += sprintf(p,
 280                                      "\n\tAlias boundary : %d byte(s)\n"
 281                                      "\tTag LSB        : %d\n"
 282                                      "\tTag MSB        : %d\n",
 283                                      1<<cci.pcci_alias_boundary, cci.pcci_tag_lsb,
 284                                      cci.pcci_tag_msb);
 285
 286                         /* when unified, data(j=2) is enough */
 287                         if (cci.pcci_unified) break;
 288                 }
 289         }
 290         return p - page;
 291 }
 292
 293
 294 static int
 295 vm_info(char *page)
 296 {
 297         char *p = page;
 298         u64 tr_pages =0, vw_pages=0, tc_pages;
 299         u64 attrib;
 300         pal_vm_info_1_u_t vm_info_1;
 301         pal_vm_info_2_u_t vm_info_2;
 302         pal_tc_info_u_t tc_info;
 303         ia64_ptce_info_t ptce;
 304         const char *sep;
 305         int i, j;
 306         s64 status;
 307
 308         if ((status = ia64_pal_vm_summary(&vm_info_1, &vm_info_2)) !=0) {
 309                 printk(KERN_ERR "ia64_pal_vm_summary=%ld\n", status);
 310         } else {
 311
 312                 p += sprintf(p,
 313                      "Physical Address Space         : %d bits\n"
 314                      "Virtual Address Space          : %d bits\n"
 315                      "Protection Key Registers(PKR)  : %d\n"
 316                      "Implemented bits in PKR.key    : %d\n"
 317                      "Hash Tag ID                    : 0x%x\n"
 318                      "Size of RR.rid                 : %d\n"
 319                      "Max Purges                     : ",
 320                      vm_info_1.pal_vm_info_1_s.phys_add_size,
 321                      vm_info_2.pal_vm_info_2_s.impl_va_msb+1,
 322                      vm_info_1.pal_vm_info_1_s.max_pkr+1,
 323                      vm_info_1.pal_vm_info_1_s.key_size,
 324                      vm_info_1.pal_vm_info_1_s.hash_tag_id,
 325                      vm_info_2.pal_vm_info_2_s.rid_size);
 326                 if (vm_info_2.pal_vm_info_2_s.max_purges == PAL_MAX_PURGES)
 327                         p += sprintf(p, "unlimited\n");
 328                 else
 329                         p += sprintf(p, "%d\n",
 330                                 vm_info_2.pal_vm_info_2_s.max_purges ?
 331                                 vm_info_2.pal_vm_info_2_s.max_purges : 1);
 332         }
 333
 334         if (ia64_pal_mem_attrib(&attrib) == 0) {
 335                 p += sprintf(p, "Supported memory attributes    : ");
 336                 sep = "";
 337                 for (i = 0; i < 8; i++) {
 338                         if (attrib & (1 << i)) {
 339                                 p += sprintf(p, "%s%s", sep, mem_attrib[i]);
 340                                 sep = ", ";
 341                         }
 342                 }
 343                 p += sprintf(p, "\n");
 344         }
 345
 346         if ((status = ia64_pal_vm_page_size(&tr_pages, &vw_pages)) !=0) {
 347                 printk(KERN_ERR "ia64_pal_vm_page_size=%ld\n", status);
 348         } else {
 349
 350                 p += sprintf(p,
 351                              "\nTLB walker                     : %simplemented\n"
 352                              "Number of DTR                  : %d\n"
 353                              "Number of ITR                  : %d\n"
 354                              "TLB insertable page sizes      : ",
 355                              vm_info_1.pal_vm_info_1_s.vw ? "" : "not ",
 356                              vm_info_1.pal_vm_info_1_s.max_dtr_entry+1,
 357                              vm_info_1.pal_vm_info_1_s.max_itr_entry+1);
 358
 359
 360                 p = bitvector_process(p, tr_pages);
 361
 362                 p += sprintf(p, "\nTLB purgeable page sizes       : ");
 363
 364                 p = bitvector_process(p, vw_pages);
 365         }
 366         if ((status=ia64_get_ptce(&ptce)) != 0) {
 367                 printk(KERN_ERR "ia64_get_ptce=%ld\n", status);
 368         } else {
 369                 p += sprintf(p,
 370                      "\nPurge base address             : 0x%016lx\n"
 371                      "Purge outer loop count         : %d\n"
 372                      "Purge inner loop count         : %d\n"
 373                      "Purge outer loop stride        : %d\n"
 374                      "Purge inner loop stride        : %d\n",
 375                      ptce.base, ptce.count[0], ptce.count[1],
 376                      ptce.stride[0], ptce.stride[1]);
 377
 378                 p += sprintf(p,
 379                      "TC Levels                      : %d\n"
 380                      "Unique TC(s)                   : %d\n",
 381                      vm_info_1.pal_vm_info_1_s.num_tc_levels,
 382                      vm_info_1.pal_vm_info_1_s.max_unique_tcs);
 383
 384                 for(i=0; i < vm_info_1.pal_vm_info_1_s.num_tc_levels; i++) {
 385                         for (j=2; j>0 ; j--) {
 386                                 tc_pages = 0; /* just in case */
 387
 388
 389                                 /* even without unification, some levels may not be present */
 390                                 if ((status=ia64_pal_vm_info(i,j, &tc_info, &tc_pages)) != 0) {
 391                                         continue;
 392                                 }
 393
 394                                 p += sprintf(p,
 395                                      "\n%s Translation Cache Level %d:\n"
 396                                      "\tHash sets           : %d\n"
 397                                      "\tAssociativity       : %d\n"
 398                                      "\tNumber of entries   : %d\n"
 399                                      "\tFlags               : ",
 400                                      cache_types[j+tc_info.tc_unified], i+1,
 401                                      tc_info.tc_num_sets,
 402                                      tc_info.tc_associativity,
 403                                      tc_info.tc_num_entries);
 404
 405                                 if (tc_info.tc_pf)
 406                                         p += sprintf(p, "PreferredPageSizeOptimized ");
 407                                 if (tc_info.tc_unified)
 408                                         p += sprintf(p, "Unified ");
 409                                 if (tc_info.tc_reduce_tr)
 410                                         p += sprintf(p, "TCReduction");
 411
 412                                 p += sprintf(p, "\n\tSupported page sizes: ");
 413
 414                                 p = bitvector_process(p, tc_pages);
 415
 416                                 /* when unified date (j=2) is enough */
 417                                 if (tc_info.tc_unified)
 418                                         break;
 419                         }
 420                 }
 421         }
 422         p += sprintf(p, "\n");
 423
 424         return p - page;
 425 }
 426
 427
 428 static int
 429 register_info(char *page)
 430 {
 431         char *p = page;
 432         u64 reg_info[2];
 433         u64 info;
 434         u64 phys_stacked;
 435         pal_hints_u_t hints;
 436         u64 iregs, dregs;
 437         char *info_type[]={
 438                 "Implemented AR(s)",
 439                 "AR(s) with read side-effects",
 440                 "Implemented CR(s)",
 441                 "CR(s) with read side-effects",
 442         };
 443
 444         for(info=0; info < 4; info++) {
 445
 446                 if (ia64_pal_register_info(info, &reg_info[0], &reg_info[1]) != 0) return 0;
 447
 448                 p += sprintf(p, "%-32s : ", info_type[info]);
 449
 450                 p = bitregister_process(p, reg_info, 128);
 451
 452                 p += sprintf(p, "\n");
 453         }
 454
 455         if (ia64_pal_rse_info(&phys_stacked, &hints) == 0) {
 456
 457         p += sprintf(p,
 458                      "RSE stacked physical registers   : %ld\n"
 459                      "RSE load/store hints             : %ld (%s)\n",
 460                      phys_stacked, hints.ph_data,
 461                      hints.ph_data < RSE_HINTS_COUNT ? rse_hints[hints.ph_data]: "(??)");
 462         }
 463         if (ia64_pal_debug_info(&iregs, &dregs))
 464                 return 0;
 465
 466         p += sprintf(p,
 467                      "Instruction debug register pairs : %ld\n"
 468                      "Data debug register pairs        : %ld\n", iregs, dregs);
 469
 470         return p - page;
 471 }
 472
 473 static const char *proc_features[]={
 474         NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
 475         NULL,NULL,NULL,NULL,NULL,NULL,NULL, NULL,NULL,
 476         NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
 477         NULL,NULL,NULL,NULL,NULL, NULL,NULL,NULL,NULL,
 478         "Unimplemented instruction address fault",
 479         "INIT, PMI, and LINT pins",
 480         "Simple unimplemented instr addresses",
 481         "Variable P-state performance",
 482         "Virtual machine features implemented",
 483         "XIP,XPSR,XFS implemented",
 484         "XR1-XR3 implemented",
 485         "Disable dynamic predicate prediction",
 486         "Disable processor physical number",
 487         "Disable dynamic data cache prefetch",
 488         "Disable dynamic inst cache prefetch",
 489         "Disable dynamic branch prediction",
 490         NULL, NULL, NULL, NULL,
 491         "Disable P-states",
 492         "Enable MCA on Data Poisoning",
 493         "Enable vmsw instruction",
 494         "Enable extern environmental notification",
 495         "Disable BINIT on processor time-out",
 496         "Disable dynamic power management (DPM)",
 497         "Disable coherency",
 498         "Disable cache",
 499         "Enable CMCI promotion",
 500         "Enable MCA to BINIT promotion",
 501         "Enable MCA promotion",
 502         "Enable BERR promotion"
 503 };
 504
 505
 506 static int
 507 processor_info(char *page)
 508 {
 509         char *p = page;
 510         const char **v = proc_features;
 511         u64 avail=1, status=1, control=1;
 512         int i;
 513         s64 ret;
 514
 515         if ((ret=ia64_pal_proc_get_features(&avail, &status, &control)) != 0) return 0;
 516
 517         for(i=0; i < 64; i++, v++,avail >>=1, status >>=1, control >>=1) {
 518                 if ( ! *v ) continue;
 519                 p += sprintf(p, "%-40s : %s%s %s\n", *v,
 520                                 avail & 0x1 ? "" : "NotImpl",
 521                                 avail & 0x1 ? (status & 0x1 ? "On" : "Off"): "",
 522                                 avail & 0x1 ? (control & 0x1 ? "Ctrl" : "NoCtrl"): "");
 523         }
 524         return p - page;
 525 }
 526
 527 static const char *bus_features[]={
 528         NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
 529         NULL,NULL,NULL,NULL,NULL,NULL,NULL, NULL,NULL,
 530         NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
 531         NULL,NULL,
 532         "Request  Bus Parking",
 533         "Bus Lock Mask",
 534         "Enable Half Transfer",
 535         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
 536         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
 537         NULL, NULL, NULL, NULL,
 538         "Enable Cache Line Repl. Shared",
 539         "Enable Cache Line Repl. Exclusive",
 540         "Disable Transaction Queuing",
 541         "Disable Response Error Checking",
 542         "Disable Bus Error Checking",
 543         "Disable Bus Requester Internal Error Signalling",
 544         "Disable Bus Requester Error Signalling",
 545         "Disable Bus Initialization Event Checking",
 546         "Disable Bus Initialization Event Signalling",
 547         "Disable Bus Address Error Checking",
 548         "Disable Bus Address Error Signalling",
 549         "Disable Bus Data Error Checking"
 550 };
 551
 552
 553 static int
 554 bus_info(char *page)
 555 {
 556         char *p = page;
 557         const char **v = bus_features;
 558         pal_bus_features_u_t av, st, ct;
 559         u64 avail, status, control;
 560         int i;
 561         s64 ret;
 562
 563         if ((ret=ia64_pal_bus_get_features(&av, &st, &ct)) != 0) return 0;
 564
 565         avail   = av.pal_bus_features_val;
 566         status  = st.pal_bus_features_val;
 567         control = ct.pal_bus_features_val;
 568
 569         for(i=0; i < 64; i++, v++, avail >>=1, status >>=1, control >>=1) {
 570                 if ( ! *v ) continue;
 571                 p += sprintf(p, "%-48s : %s%s %s\n", *v,
 572                                 avail & 0x1 ? "" : "NotImpl",
 573                                 avail & 0x1 ? (status  & 0x1 ? "On" : "Off"): "",
 574                                 avail & 0x1 ? (control & 0x1 ? "Ctrl" : "NoCtrl"): "");
 575         }
 576         return p - page;
 577 }
 578
 579 static int
 580 version_info(char *page)
 581 {
 582         pal_version_u_t min_ver, cur_ver;
 583         char *p = page;
 584
 585         if (ia64_pal_version(&min_ver, &cur_ver) != 0)
 586                 return 0;
 587
 588         p += sprintf(p,
 589                      "PAL_vendor : 0x%02x (min=0x%02x)\n"
 590                      "PAL_A      : %02x.%02x (min=%02x.%02x)\n"
 591                      "PAL_B      : %02x.%02x (min=%02x.%02x)\n",
 592                      cur_ver.pal_version_s.pv_pal_vendor,
 593                      min_ver.pal_version_s.pv_pal_vendor,
 594                      cur_ver.pal_version_s.pv_pal_a_model,
 595                      cur_ver.pal_version_s.pv_pal_a_rev,
 596                      min_ver.pal_version_s.pv_pal_a_model,
 597                      min_ver.pal_version_s.pv_pal_a_rev,
 598                      cur_ver.pal_version_s.pv_pal_b_model,
 599                      cur_ver.pal_version_s.pv_pal_b_rev,
 600                      min_ver.pal_version_s.pv_pal_b_model,
 601                      min_ver.pal_version_s.pv_pal_b_rev);
 602         return p - page;
 603 }
 604
 605 static int
 606 perfmon_info(char *page)
 607 {
 608         char *p = page;
 609         u64 pm_buffer[16];
 610         pal_perf_mon_info_u_t pm_info;
 611
 612         if (ia64_pal_perf_mon_info(pm_buffer, &pm_info) != 0) return 0;
 613
 614         p += sprintf(p,
 615                      "PMC/PMD pairs                 : %d\n"
 616                      "Counter width                 : %d bits\n"
 617                      "Cycle event number            : %d\n"
 618                      "Retired event number          : %d\n"
 619                      "Implemented PMC               : ",
 620                      pm_info.pal_perf_mon_info_s.generic, pm_info.pal_perf_mon_info_s.width,
 621                      pm_info.pal_perf_mon_info_s.cycles, pm_info.pal_perf_mon_info_s.retired);
 622
 623         p = bitregister_process(p, pm_buffer, 256);
 624         p += sprintf(p, "\nImplemented PMD               : ");
 625         p = bitregister_process(p, pm_buffer+4, 256);
 626         p += sprintf(p, "\nCycles count capable          : ");
 627         p = bitregister_process(p, pm_buffer+8, 256);
 628         p += sprintf(p, "\nRetired bundles count capable : ");
 629
 630 #ifdef CONFIG_ITANIUM
 631         /*
 632          * PAL_PERF_MON_INFO reports that only PMC4 can be used to count CPU_CYCLES
 633          * which is wrong, both PMC4 and PMD5 support it.
 634          */
 635         if (pm_buffer[12] == 0x10) pm_buffer[12]=0x30;
 636 #endif
 637
 638         p = bitregister_process(p, pm_buffer+12, 256);
 639
 640         p += sprintf(p, "\n");
 641
 642         return p - page;
 643 }
 644
 645 static int
 646 frequency_info(char *page)
 647 {
 648         char *p = page;
 649         struct pal_freq_ratio proc, itc, bus;
 650         u64 base;
 651
 652         if (ia64_pal_freq_base(&base) == -1)
 653                 p += sprintf(p, "Output clock            : not implemented\n");
 654         else
 655                 p += sprintf(p, "Output clock            : %ld ticks/s\n", base);
 656
 657         if (ia64_pal_freq_ratios(&proc, &bus, &itc) != 0) return 0;
 658
 659         p += sprintf(p,
 660                      "Processor/Clock ratio   : %d/%d\n"
 661                      "Bus/Clock ratio         : %d/%d\n"
 662                      "ITC/Clock ratio         : %d/%d\n",
 663                      proc.num, proc.den, bus.num, bus.den, itc.num, itc.den);
 664
 665         return p - page;
 666 }
 667
 668 static int
 669 tr_info(char *page)
 670 {
 671         char *p = page;
 672         s64 status;
 673         pal_tr_valid_u_t tr_valid;
 674         u64 tr_buffer[4];
 675         pal_vm_info_1_u_t vm_info_1;
 676         pal_vm_info_2_u_t vm_info_2;
 677         u64 i, j;
 678         u64 max[3], pgm;
 679         struct ifa_reg {
 680                 u64 valid:1;
 681                 u64 ig:11;
 682                 u64 vpn:52;
 683         } *ifa_reg;
 684         struct itir_reg {
 685                 u64 rv1:2;
 686                 u64 ps:6;
 687                 u64 key:24;
 688                 u64 rv2:32;
 689         } *itir_reg;
 690         struct gr_reg {
 691                 u64 p:1;
 692                 u64 rv1:1;
 693                 u64 ma:3;
 694                 u64 a:1;
 695                 u64 d:1;
 696                 u64 pl:2;
 697                 u64 ar:3;
 698                 u64 ppn:38;
 699                 u64 rv2:2;
 700                 u64 ed:1;
 701                 u64 ig:11;
 702         } *gr_reg;
 703         struct rid_reg {
 704                 u64 ig1:1;
 705                 u64 rv1:1;
 706                 u64 ig2:6;
 707                 u64 rid:24;
 708                 u64 rv2:32;
 709         } *rid_reg;
 710
 711         if ((status = ia64_pal_vm_summary(&vm_info_1, &vm_info_2)) !=0) {
 712                 printk(KERN_ERR "ia64_pal_vm_summary=%ld\n", status);
 713                 return 0;
 714         }
 715         max[0] = vm_info_1.pal_vm_info_1_s.max_itr_entry+1;
 716         max[1] = vm_info_1.pal_vm_info_1_s.max_dtr_entry+1;
 717
 718         for (i=0; i < 2; i++ ) {
 719                 for (j=0; j < max[i]; j++) {
 720
 721                 status = ia64_pal_tr_read(j, i, tr_buffer, &tr_valid);
 722                 if (status != 0) {
 723                         printk(KERN_ERR "palinfo: pal call failed on tr[%lu:%lu]=%ld\n",
 724                                i, j, status);
 725                         continue;
 726                 }
 727
 728                 ifa_reg  = (struct ifa_reg *)&tr_buffer[2];
 729
 730                 if (ifa_reg->valid == 0) continue;
 731
 732                 gr_reg   = (struct gr_reg *)tr_buffer;
 733                 itir_reg = (struct itir_reg *)&tr_buffer[1];
 734                 rid_reg  = (struct rid_reg *)&tr_buffer[3];
 735
 736                 pgm      = -1 << (itir_reg->ps - 12);
 737                 p += sprintf(p,
 738                              "%cTR%lu: av=%d pv=%d dv=%d mv=%d\n"
 739                              "\tppn  : 0x%lx\n"
 740                              "\tvpn  : 0x%lx\n"
 741                              "\tps   : ",
 742                              "ID"[i], j,
 743                              tr_valid.pal_tr_valid_s.access_rights_valid,
 744                              tr_valid.pal_tr_valid_s.priv_level_valid,
 745                              tr_valid.pal_tr_valid_s.dirty_bit_valid,
 746                              tr_valid.pal_tr_valid_s.mem_attr_valid,
 747                              (gr_reg->ppn & pgm)<< 12, (ifa_reg->vpn & pgm)<< 12);
 748
 749                 p = bitvector_process(p, 1<< itir_reg->ps);
 750
 751                 p += sprintf(p,
 752                              "\n\tpl   : %d\n"
 753                              "\tar   : %d\n"
 754                              "\trid  : %x\n"
 755                              "\tp    : %d\n"
 756                              "\tma   : %d\n"
 757                              "\td    : %d\n",
 758                              gr_reg->pl, gr_reg->ar, rid_reg->rid, gr_reg->p, gr_reg->ma,
 759                              gr_reg->d);
 760                 }
 761         }
 762         return p - page;
 763 }
 764
 765
 766
 767 /*
 768  * List {name,function} pairs for every entry in /proc/palinfo/cpu*
 769  */
 770 static palinfo_entry_t palinfo_entries[]={
 771         { "version_info",       version_info, },
 772         { "vm_info",            vm_info, },
 773         { "cache_info",         cache_info, },
 774         { "power_info",         power_info, },
 775         { "register_info",      register_info, },
 776         { "processor_info",     processor_info, },
 777         { "perfmon_info",       perfmon_info, },
 778         { "frequency_info",     frequency_info, },
 779         { "bus_info",           bus_info },
 780         { "tr_info",            tr_info, }
 781 };
 782
 783 #define NR_PALINFO_ENTRIES      (int) ARRAY_SIZE(palinfo_entries)
 784
 785 /*
 786  * this array is used to keep track of the proc entries we create. This is
 787  * required in the module mode when we need to remove all entries. The procfs code
 788  * does not do recursion of deletion
 789  *
 790  * Notes:
 791  *      - +1 accounts for the cpuN directory entry in /proc/pal
 792  */
 793 #define NR_PALINFO_PROC_ENTRIES (NR_CPUS*(NR_PALINFO_ENTRIES+1))
 794
 795 static struct proc_dir_entry *palinfo_proc_entries[NR_PALINFO_PROC_ENTRIES];
 796 static struct proc_dir_entry *palinfo_dir;
 797
 798 /*
 799  * This data structure is used to pass which cpu,function is being requested
 800  * It must fit in a 64bit quantity to be passed to the proc callback routine
 801  *
 802  * In SMP mode, when we get a request for another CPU, we must call that
 803  * other CPU using IPI and wait for the result before returning.
 804  */
 805 typedef union {
 806         u64 value;
 807         struct {
 808                 unsigned        req_cpu: 32;    /* for which CPU this info is */
 809                 unsigned        func_id: 32;    /* which function is requested */
 810         } pal_func_cpu;
 811 } pal_func_cpu_u_t;
 812
 813 #define req_cpu pal_func_cpu.req_cpu
 814 #define func_id pal_func_cpu.func_id
 815
 816 #ifdef CONFIG_SMP
 817
 818 /*
 819  * used to hold information about final function to call
 820  */
 821 typedef struct {
 822         palinfo_func_t  func;   /* pointer to function to call */
 823         char            *page;  /* buffer to store results */
 824         int             ret;    /* return value from call */
 825 } palinfo_smp_data_t;
 826
 827
 828 /*
 829  * this function does the actual final call and he called
 830  * from the smp code, i.e., this is the palinfo callback routine
 831  */
 832 static void
 833 palinfo_smp_call(void *info)
 834 {
 835         palinfo_smp_data_t *data = (palinfo_smp_data_t *)info;
 836         if (data == NULL) {
 837                 printk(KERN_ERR "palinfo: data pointer is NULL\n");
 838                 data->ret = 0; /* no output */
 839                 return;
 840         }
 841         /* does this actual call */
 842         data->ret = (*data->func)(data->page);
 843 }
 844
 845 /*
 846  * function called to trigger the IPI, we need to access a remote CPU
 847  * Return:
 848  *      0 : error or nothing to output
 849  *      otherwise how many bytes in the "page" buffer were written
 850  */
 851 static
 852 int palinfo_handle_smp(pal_func_cpu_u_t *f, char *page)
 853 {
 854         palinfo_smp_data_t ptr;
 855         int ret;
 856
 857         ptr.func = palinfo_entries[f->func_id].proc_read;
 858         ptr.page = page;
 859         ptr.ret  = 0; /* just in case */
 860
 861
 862         /* will send IPI to other CPU and wait for completion of remote call */
 863         if ((ret=smp_call_function_single(f->req_cpu, palinfo_smp_call, &ptr, 0, 1))) {
 864                 printk(KERN_ERR "palinfo: remote CPU call from %d to %d on function %d: "
 865                        "error %d\n", smp_processor_id(), f->req_cpu, f->func_id, ret);
 866                 return 0;
 867         }
 868         return ptr.ret;
 869 }
 870 #else /* ! CONFIG_SMP */
 871 static
 872 int palinfo_handle_smp(pal_func_cpu_u_t *f, char *page)
 873 {
 874         printk(KERN_ERR "palinfo: should not be called with non SMP kernel\n");
 875         return 0;
 876 }
 877 #endif /* CONFIG_SMP */
 878
 879 /*
 880  * Entry point routine: all calls go through this function
 881  */
 882 static int
 883 palinfo_read_entry(char *page, char **start, off_t off, int count, int *eof, void *data)
 884 {
 885         int len=0;
 886         pal_func_cpu_u_t *f = (pal_func_cpu_u_t *)&data;
 887
 888         /*
 889          * in SMP mode, we may need to call another CPU to get correct
 890          * information. PAL, by definition, is processor specific
 891          */
 892         if (f->req_cpu == get_cpu())
 893                 len = (*palinfo_entries[f->func_id].proc_read)(page);
 894         else
 895                 len = palinfo_handle_smp(f, page);
 896
 897         put_cpu();
 898
 899         if (len <= off+count) *eof = 1;
 900
 901         *start = page + off;
 902         len   -= off;
 903
 904         if (len>count) len = count;
 905         if (len<0) len = 0;
 906
 907         return len;
 908 }
 909
 910 static void __cpuinit
 911 create_palinfo_proc_entries(unsigned int cpu)
 912 {
 913 #       define CPUSTR   "cpu%d"
 914
 915         pal_func_cpu_u_t f;
 916         struct proc_dir_entry **pdir;
 917         struct proc_dir_entry *cpu_dir;
 918         int j;
 919         char cpustr[sizeof(CPUSTR)];
 920
 921
 922         /*
 923          * we keep track of created entries in a depth-first order for
 924          * cleanup purposes. Each entry is stored into palinfo_proc_entries
 925          */
 926         sprintf(cpustr,CPUSTR, cpu);
 927
 928         cpu_dir = proc_mkdir(cpustr, palinfo_dir);
 929
 930         f.req_cpu = cpu;
 931
 932         /*
 933          * Compute the location to store per cpu entries
 934          * We dont store the top level entry in this list, but
 935          * remove it finally after removing all cpu entries.
 936          */
 937         pdir = &palinfo_proc_entries[cpu*(NR_PALINFO_ENTRIES+1)];
 938         *pdir++ = cpu_dir;
 939         for (j=0; j < NR_PALINFO_ENTRIES; j++) {
 940                 f.func_id = j;
 941                 *pdir = create_proc_read_entry(
 942                                 palinfo_entries[j].name, 0, cpu_dir,
 943                                 palinfo_read_entry, (void *)f.value);
 944                 if (*pdir)
 945                         (*pdir)->owner = THIS_MODULE;
 946                 pdir++;
 947         }
 948 }
 949
 950 static void
 951 remove_palinfo_proc_entries(unsigned int hcpu)
 952 {
 953         int j;
 954         struct proc_dir_entry *cpu_dir, **pdir;
 955
 956         pdir = &palinfo_proc_entries[hcpu*(NR_PALINFO_ENTRIES+1)];
 957         cpu_dir = *pdir;
 958         *pdir++=NULL;
 959         for (j=0; j < (NR_PALINFO_ENTRIES); j++) {
 960                 if ((*pdir)) {
 961                         remove_proc_entry ((*pdir)->name, cpu_dir);
 962                         *pdir ++= NULL;
 963                 }
 964         }
 965
 966         if (cpu_dir) {
 967                 remove_proc_entry(cpu_dir->name, palinfo_dir);
 968         }
 969 }
 970
 971 static int __cpuinit palinfo_cpu_callback(struct notifier_block *nfb,
 972                                         unsigned long action, void *hcpu)
 973 {
 974         unsigned int hotcpu = (unsigned long)hcpu;
 975
 976         switch (action) {
 977         case CPU_ONLINE:
 978         case CPU_ONLINE_FROZEN:
 979                 create_palinfo_proc_entries(hotcpu);
 980                 break;
 981         case CPU_DEAD:
 982         case CPU_DEAD_FROZEN:
 983                 remove_palinfo_proc_entries(hotcpu);
 984                 break;
 985         }
 986         return NOTIFY_OK;
 987 }
 988
 989 static struct notifier_block palinfo_cpu_notifier __cpuinitdata =
 990 {
 991         .notifier_call = palinfo_cpu_callback,
 992         .priority = 0,
 993 };
 994
 995 static int __init
 996 palinfo_init(void)
 997 {
 998         int i = 0;
 999
1000         printk(KERN_INFO "PAL Information Facility v%s\n", PALINFO_VERSION);
1001         palinfo_dir = proc_mkdir("pal", NULL);
1002
1003         /* Create palinfo dirs in /proc for all online cpus */
1004         for_each_online_cpu(i) {
1005                 create_palinfo_proc_entries(i);
1006         }
1007
1008         /* Register for future delivery via notify registration */
1009         register_hotcpu_notifier(&palinfo_cpu_notifier);
1010
1011         return 0;
1012 }
1013
1014 static void __exit
1015 palinfo_exit(void)
1016 {
1017         int i = 0;
1018
1019         /* remove all nodes: depth first pass. Could optimize this  */
1020         for_each_online_cpu(i) {
1021                 remove_palinfo_proc_entries(i);
1022         }
1023
1024         /*
1025          * Remove the top level entry finally
1026          */
1027         remove_proc_entry(palinfo_dir->name, NULL);
1028
1029         /*
1030          * Unregister from cpu notifier callbacks
1031          */
1032         unregister_hotcpu_notifier(&palinfo_cpu_notifier);
1033 }
1034
1035 module_init(palinfo_init);
1036 module_exit(palinfo_exit);