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  */
  20 #include <linux/config.h>
  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           : %lu 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                      vm_info_1.pal_vm_info_1_s.phys_add_size,
 320                      vm_info_2.pal_vm_info_2_s.impl_va_msb+1,
 321                      vm_info_1.pal_vm_info_1_s.max_pkr+1,
 322                      vm_info_1.pal_vm_info_1_s.key_size,
 323                      vm_info_1.pal_vm_info_1_s.hash_tag_id,
 324                      vm_info_2.pal_vm_info_2_s.rid_size);
 325         }
 326
 327         if (ia64_pal_mem_attrib(&attrib) == 0) {
 328                 p += sprintf(p, "Supported memory attributes    : ");
 329                 sep = "";
 330                 for (i = 0; i < 8; i++) {
 331                         if (attrib & (1 << i)) {
 332                                 p += sprintf(p, "%s%s", sep, mem_attrib[i]);
 333                                 sep = ", ";
 334                         }
 335                 }
 336                 p += sprintf(p, "\n");
 337         }
 338
 339         if ((status = ia64_pal_vm_page_size(&tr_pages, &vw_pages)) !=0) {
 340                 printk(KERN_ERR "ia64_pal_vm_page_size=%ld\n", status);
 341         } else {
 342
 343                 p += sprintf(p,
 344                              "\nTLB walker                     : %simplemented\n"
 345                              "Number of DTR                  : %d\n"
 346                              "Number of ITR                  : %d\n"
 347                              "TLB insertable page sizes      : ",
 348                              vm_info_1.pal_vm_info_1_s.vw ? "" : "not ",
 349                              vm_info_1.pal_vm_info_1_s.max_dtr_entry+1,
 350                              vm_info_1.pal_vm_info_1_s.max_itr_entry+1);
 351
 352
 353                 p = bitvector_process(p, tr_pages);
 354
 355                 p += sprintf(p, "\nTLB purgeable page sizes       : ");
 356
 357                 p = bitvector_process(p, vw_pages);
 358         }
 359         if ((status=ia64_get_ptce(&ptce)) != 0) {
 360                 printk(KERN_ERR "ia64_get_ptce=%ld\n", status);
 361         } else {
 362                 p += sprintf(p,
 363                      "\nPurge base address             : 0x%016lx\n"
 364                      "Purge outer loop count         : %d\n"
 365                      "Purge inner loop count         : %d\n"
 366                      "Purge outer loop stride        : %d\n"
 367                      "Purge inner loop stride        : %d\n",
 368                      ptce.base, ptce.count[0], ptce.count[1],
 369                      ptce.stride[0], ptce.stride[1]);
 370
 371                 p += sprintf(p,
 372                      "TC Levels                      : %d\n"
 373                      "Unique TC(s)                   : %d\n",
 374                      vm_info_1.pal_vm_info_1_s.num_tc_levels,
 375                      vm_info_1.pal_vm_info_1_s.max_unique_tcs);
 376
 377                 for(i=0; i < vm_info_1.pal_vm_info_1_s.num_tc_levels; i++) {
 378                         for (j=2; j>0 ; j--) {
 379                                 tc_pages = 0; /* just in case */
 380
 381
 382                                 /* even without unification, some levels may not be present */
 383                                 if ((status=ia64_pal_vm_info(i,j, &tc_info, &tc_pages)) != 0) {
 384                                         continue;
 385                                 }
 386
 387                                 p += sprintf(p,
 388                                      "\n%s Translation Cache Level %d:\n"
 389                                      "\tHash sets           : %d\n"
 390                                      "\tAssociativity       : %d\n"
 391                                      "\tNumber of entries   : %d\n"
 392                                      "\tFlags               : ",
 393                                      cache_types[j+tc_info.tc_unified], i+1,
 394                                      tc_info.tc_num_sets,
 395                                      tc_info.tc_associativity,
 396                                      tc_info.tc_num_entries);
 397
 398                                 if (tc_info.tc_pf)
 399                                         p += sprintf(p, "PreferredPageSizeOptimized ");
 400                                 if (tc_info.tc_unified)
 401                                         p += sprintf(p, "Unified ");
 402                                 if (tc_info.tc_reduce_tr)
 403                                         p += sprintf(p, "TCReduction");
 404
 405                                 p += sprintf(p, "\n\tSupported page sizes: ");
 406
 407                                 p = bitvector_process(p, tc_pages);
 408
 409                                 /* when unified date (j=2) is enough */
 410                                 if (tc_info.tc_unified)
 411                                         break;
 412                         }
 413                 }
 414         }
 415         p += sprintf(p, "\n");
 416
 417         return p - page;
 418 }
 419
 420
 421 static int
 422 register_info(char *page)
 423 {
 424         char *p = page;
 425         u64 reg_info[2];
 426         u64 info;
 427         u64 phys_stacked;
 428         pal_hints_u_t hints;
 429         u64 iregs, dregs;
 430         char *info_type[]={
 431                 "Implemented AR(s)",
 432                 "AR(s) with read side-effects",
 433                 "Implemented CR(s)",
 434                 "CR(s) with read side-effects",
 435         };
 436
 437         for(info=0; info < 4; info++) {
 438
 439                 if (ia64_pal_register_info(info, &reg_info[0], &reg_info[1]) != 0) return 0;
 440
 441                 p += sprintf(p, "%-32s : ", info_type[info]);
 442
 443                 p = bitregister_process(p, reg_info, 128);
 444
 445                 p += sprintf(p, "\n");
 446         }
 447
 448         if (ia64_pal_rse_info(&phys_stacked, &hints) == 0) {
 449
 450         p += sprintf(p,
 451                      "RSE stacked physical registers   : %ld\n"
 452                      "RSE load/store hints             : %ld (%s)\n",
 453                      phys_stacked, hints.ph_data,
 454                      hints.ph_data < RSE_HINTS_COUNT ? rse_hints[hints.ph_data]: "(??)");
 455         }
 456         if (ia64_pal_debug_info(&iregs, &dregs))
 457                 return 0;
 458
 459         p += sprintf(p,
 460                      "Instruction debug register pairs : %ld\n"
 461                      "Data debug register pairs        : %ld\n", iregs, dregs);
 462
 463         return p - page;
 464 }
 465
 466 static const char *proc_features[]={
 467         NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
 468         NULL,NULL,NULL,NULL,NULL,NULL,NULL, NULL,NULL,
 469         NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
 470         NULL,NULL,NULL,NULL,NULL, NULL,NULL,NULL,NULL,
 471         NULL,NULL,NULL,NULL,NULL,
 472         "XIP,XPSR,XFS implemented",
 473         "XR1-XR3 implemented",
 474         "Disable dynamic predicate prediction",
 475         "Disable processor physical number",
 476         "Disable dynamic data cache prefetch",
 477         "Disable dynamic inst cache prefetch",
 478         "Disable dynamic branch prediction",
 479         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
 480         "Disable BINIT on processor time-out",
 481         "Disable dynamic power management (DPM)",
 482         "Disable coherency",
 483         "Disable cache",
 484         "Enable CMCI promotion",
 485         "Enable MCA to BINIT promotion",
 486         "Enable MCA promotion",
 487         "Enable BERR promotion"
 488 };
 489
 490
 491 static int
 492 processor_info(char *page)
 493 {
 494         char *p = page;
 495         const char **v = proc_features;
 496         u64 avail=1, status=1, control=1;
 497         int i;
 498         s64 ret;
 499
 500         if ((ret=ia64_pal_proc_get_features(&avail, &status, &control)) != 0) return 0;
 501
 502         for(i=0; i < 64; i++, v++,avail >>=1, status >>=1, control >>=1) {
 503                 if ( ! *v ) continue;
 504                 p += sprintf(p, "%-40s : %s%s %s\n", *v,
 505                                 avail & 0x1 ? "" : "NotImpl",
 506                                 avail & 0x1 ? (status & 0x1 ? "On" : "Off"): "",
 507                                 avail & 0x1 ? (control & 0x1 ? "Ctrl" : "NoCtrl"): "");
 508         }
 509         return p - page;
 510 }
 511
 512 static const char *bus_features[]={
 513         NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
 514         NULL,NULL,NULL,NULL,NULL,NULL,NULL, NULL,NULL,
 515         NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,
 516         NULL,NULL,
 517         "Request  Bus Parking",
 518         "Bus Lock Mask",
 519         "Enable Half Transfer",
 520         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
 521         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
 522         NULL, NULL, NULL, NULL,
 523         "Enable Cache Line Repl. Shared",
 524         "Enable Cache Line Repl. Exclusive",
 525         "Disable Transaction Queuing",
 526         "Disable Response Error Checking",
 527         "Disable Bus Error Checking",
 528         "Disable Bus Requester Internal Error Signalling",
 529         "Disable Bus Requester Error Signalling",
 530         "Disable Bus Initialization Event Checking",
 531         "Disable Bus Initialization Event Signalling",
 532         "Disable Bus Address Error Checking",
 533         "Disable Bus Address Error Signalling",
 534         "Disable Bus Data Error Checking"
 535 };
 536
 537
 538 static int
 539 bus_info(char *page)
 540 {
 541         char *p = page;
 542         const char **v = bus_features;
 543         pal_bus_features_u_t av, st, ct;
 544         u64 avail, status, control;
 545         int i;
 546         s64 ret;
 547
 548         if ((ret=ia64_pal_bus_get_features(&av, &st, &ct)) != 0) return 0;
 549
 550         avail   = av.pal_bus_features_val;
 551         status  = st.pal_bus_features_val;
 552         control = ct.pal_bus_features_val;
 553
 554         for(i=0; i < 64; i++, v++, avail >>=1, status >>=1, control >>=1) {
 555                 if ( ! *v ) continue;
 556                 p += sprintf(p, "%-48s : %s%s %s\n", *v,
 557                                 avail & 0x1 ? "" : "NotImpl",
 558                                 avail & 0x1 ? (status  & 0x1 ? "On" : "Off"): "",
 559                                 avail & 0x1 ? (control & 0x1 ? "Ctrl" : "NoCtrl"): "");
 560         }
 561         return p - page;
 562 }
 563
 564 static int
 565 version_info(char *page)
 566 {
 567         pal_version_u_t min_ver, cur_ver;
 568         char *p = page;
 569
 570         /* The PAL_VERSION call is advertised as being able to support
 571          * both physical and virtual mode calls. This seems to be a documentation
 572          * bug rather than firmware bug. In fact, it does only support physical mode.
 573          * So now the code reflects this fact and the pal_version() has been updated
 574          * accordingly.
 575          */
 576         if (ia64_pal_version(&min_ver, &cur_ver) != 0) return 0;
 577
 578         p += sprintf(p,
 579                      "PAL_vendor : 0x%02x (min=0x%02x)\n"
 580                      "PAL_A      : %x.%x.%x (min=%x.%x.%x)\n"
 581                      "PAL_B      : %x.%x.%x (min=%x.%x.%x)\n",
 582                      cur_ver.pal_version_s.pv_pal_vendor, min_ver.pal_version_s.pv_pal_vendor,
 583
 584                      cur_ver.pal_version_s.pv_pal_a_model>>4,
 585                      cur_ver.pal_version_s.pv_pal_a_model&0xf, cur_ver.pal_version_s.pv_pal_a_rev,
 586                      min_ver.pal_version_s.pv_pal_a_model>>4,
 587                      min_ver.pal_version_s.pv_pal_a_model&0xf, min_ver.pal_version_s.pv_pal_a_rev,
 588
 589                      cur_ver.pal_version_s.pv_pal_b_model>>4,
 590                      cur_ver.pal_version_s.pv_pal_b_model&0xf, cur_ver.pal_version_s.pv_pal_b_rev,
 591                      min_ver.pal_version_s.pv_pal_b_model>>4,
 592                      min_ver.pal_version_s.pv_pal_b_model&0xf, min_ver.pal_version_s.pv_pal_b_rev);
 593         return p - page;
 594 }
 595
 596 static int
 597 perfmon_info(char *page)
 598 {
 599         char *p = page;
 600         u64 pm_buffer[16];
 601         pal_perf_mon_info_u_t pm_info;
 602
 603         if (ia64_pal_perf_mon_info(pm_buffer, &pm_info) != 0) return 0;
 604
 605         p += sprintf(p,
 606                      "PMC/PMD pairs                 : %d\n"
 607                      "Counter width                 : %d bits\n"
 608                      "Cycle event number            : %d\n"
 609                      "Retired event number          : %d\n"
 610                      "Implemented PMC               : ",
 611                      pm_info.pal_perf_mon_info_s.generic, pm_info.pal_perf_mon_info_s.width,
 612                      pm_info.pal_perf_mon_info_s.cycles, pm_info.pal_perf_mon_info_s.retired);
 613
 614         p = bitregister_process(p, pm_buffer, 256);
 615         p += sprintf(p, "\nImplemented PMD               : ");
 616         p = bitregister_process(p, pm_buffer+4, 256);
 617         p += sprintf(p, "\nCycles count capable          : ");
 618         p = bitregister_process(p, pm_buffer+8, 256);
 619         p += sprintf(p, "\nRetired bundles count capable : ");
 620
 621 #ifdef CONFIG_ITANIUM
 622         /*
 623          * PAL_PERF_MON_INFO reports that only PMC4 can be used to count CPU_CYCLES
 624          * which is wrong, both PMC4 and PMD5 support it.
 625          */
 626         if (pm_buffer[12] == 0x10) pm_buffer[12]=0x30;
 627 #endif
 628
 629         p = bitregister_process(p, pm_buffer+12, 256);
 630
 631         p += sprintf(p, "\n");
 632
 633         return p - page;
 634 }
 635
 636 static int
 637 frequency_info(char *page)
 638 {
 639         char *p = page;
 640         struct pal_freq_ratio proc, itc, bus;
 641         u64 base;
 642
 643         if (ia64_pal_freq_base(&base) == -1)
 644                 p += sprintf(p, "Output clock            : not implemented\n");
 645         else
 646                 p += sprintf(p, "Output clock            : %ld ticks/s\n", base);
 647
 648         if (ia64_pal_freq_ratios(&proc, &bus, &itc) != 0) return 0;
 649
 650         p += sprintf(p,
 651                      "Processor/Clock ratio   : %ld/%ld\n"
 652                      "Bus/Clock ratio         : %ld/%ld\n"
 653                      "ITC/Clock ratio         : %ld/%ld\n",
 654                      proc.num, proc.den, bus.num, bus.den, itc.num, itc.den);
 655
 656         return p - page;
 657 }
 658
 659 static int
 660 tr_info(char *page)
 661 {
 662         char *p = page;
 663         s64 status;
 664         pal_tr_valid_u_t tr_valid;
 665         u64 tr_buffer[4];
 666         pal_vm_info_1_u_t vm_info_1;
 667         pal_vm_info_2_u_t vm_info_2;
 668         u64 i, j;
 669         u64 max[3], pgm;
 670         struct ifa_reg {
 671                 u64 valid:1;
 672                 u64 ig:11;
 673                 u64 vpn:52;
 674         } *ifa_reg;
 675         struct itir_reg {
 676                 u64 rv1:2;
 677                 u64 ps:6;
 678                 u64 key:24;
 679                 u64 rv2:32;
 680         } *itir_reg;
 681         struct gr_reg {
 682                 u64 p:1;
 683                 u64 rv1:1;
 684                 u64 ma:3;
 685                 u64 a:1;
 686                 u64 d:1;
 687                 u64 pl:2;
 688                 u64 ar:3;
 689                 u64 ppn:38;
 690                 u64 rv2:2;
 691                 u64 ed:1;
 692                 u64 ig:11;
 693         } *gr_reg;
 694         struct rid_reg {
 695                 u64 ig1:1;
 696                 u64 rv1:1;
 697                 u64 ig2:6;
 698                 u64 rid:24;
 699                 u64 rv2:32;
 700         } *rid_reg;
 701
 702         if ((status = ia64_pal_vm_summary(&vm_info_1, &vm_info_2)) !=0) {
 703                 printk(KERN_ERR "ia64_pal_vm_summary=%ld\n", status);
 704                 return 0;
 705         }
 706         max[0] = vm_info_1.pal_vm_info_1_s.max_itr_entry+1;
 707         max[1] = vm_info_1.pal_vm_info_1_s.max_dtr_entry+1;
 708
 709         for (i=0; i < 2; i++ ) {
 710                 for (j=0; j < max[i]; j++) {
 711
 712                 status = ia64_pal_tr_read(j, i, tr_buffer, &tr_valid);
 713                 if (status != 0) {
 714                         printk(KERN_ERR "palinfo: pal call failed on tr[%lu:%lu]=%ld\n",
 715                                i, j, status);
 716                         continue;
 717                 }
 718
 719                 ifa_reg  = (struct ifa_reg *)&tr_buffer[2];
 720
 721                 if (ifa_reg->valid == 0) continue;
 722
 723                 gr_reg   = (struct gr_reg *)tr_buffer;
 724                 itir_reg = (struct itir_reg *)&tr_buffer[1];
 725                 rid_reg  = (struct rid_reg *)&tr_buffer[3];
 726
 727                 pgm      = -1 << (itir_reg->ps - 12);
 728                 p += sprintf(p,
 729                              "%cTR%lu: av=%d pv=%d dv=%d mv=%d\n"
 730                              "\tppn  : 0x%lx\n"
 731                              "\tvpn  : 0x%lx\n"
 732                              "\tps   : ",
 733                              "ID"[i], j,
 734                              tr_valid.pal_tr_valid_s.access_rights_valid,
 735                              tr_valid.pal_tr_valid_s.priv_level_valid,
 736                              tr_valid.pal_tr_valid_s.dirty_bit_valid,
 737                              tr_valid.pal_tr_valid_s.mem_attr_valid,
 738                              (gr_reg->ppn & pgm)<< 12, (ifa_reg->vpn & pgm)<< 12);
 739
 740                 p = bitvector_process(p, 1<< itir_reg->ps);
 741
 742                 p += sprintf(p,
 743                              "\n\tpl   : %d\n"
 744                              "\tar   : %d\n"
 745                              "\trid  : %x\n"
 746                              "\tp    : %d\n"
 747                              "\tma   : %d\n"
 748                              "\td    : %d\n",
 749                              gr_reg->pl, gr_reg->ar, rid_reg->rid, gr_reg->p, gr_reg->ma,
 750                              gr_reg->d);
 751                 }
 752         }
 753         return p - page;
 754 }
 755
 756
 757
 758 /*
 759  * List {name,function} pairs for every entry in /proc/palinfo/cpu*
 760  */
 761 static palinfo_entry_t palinfo_entries[]={
 762         { "version_info",       version_info, },
 763         { "vm_info",            vm_info, },
 764         { "cache_info",         cache_info, },
 765         { "power_info",         power_info, },
 766         { "register_info",      register_info, },
 767         { "processor_info",     processor_info, },
 768         { "perfmon_info",       perfmon_info, },
 769         { "frequency_info",     frequency_info, },
 770         { "bus_info",           bus_info },
 771         { "tr_info",            tr_info, }
 772 };
 773
 774 #define NR_PALINFO_ENTRIES      (int) ARRAY_SIZE(palinfo_entries)
 775
 776 /*
 777  * this array is used to keep track of the proc entries we create. This is
 778  * required in the module mode when we need to remove all entries. The procfs code
 779  * does not do recursion of deletion
 780  *
 781  * Notes:
 782  *      - +1 accounts for the cpuN directory entry in /proc/pal
 783  */
 784 #define NR_PALINFO_PROC_ENTRIES (NR_CPUS*(NR_PALINFO_ENTRIES+1))
 785
 786 static struct proc_dir_entry *palinfo_proc_entries[NR_PALINFO_PROC_ENTRIES];
 787 static struct proc_dir_entry *palinfo_dir;
 788
 789 /*
 790  * This data structure is used to pass which cpu,function is being requested
 791  * It must fit in a 64bit quantity to be passed to the proc callback routine
 792  *
 793  * In SMP mode, when we get a request for another CPU, we must call that
 794  * other CPU using IPI and wait for the result before returning.
 795  */
 796 typedef union {
 797         u64 value;
 798         struct {
 799                 unsigned        req_cpu: 32;    /* for which CPU this info is */
 800                 unsigned        func_id: 32;    /* which function is requested */
 801         } pal_func_cpu;
 802 } pal_func_cpu_u_t;
 803
 804 #define req_cpu pal_func_cpu.req_cpu
 805 #define func_id pal_func_cpu.func_id
 806
 807 #ifdef CONFIG_SMP
 808
 809 /*
 810  * used to hold information about final function to call
 811  */
 812 typedef struct {
 813         palinfo_func_t  func;   /* pointer to function to call */
 814         char            *page;  /* buffer to store results */
 815         int             ret;    /* return value from call */
 816 } palinfo_smp_data_t;
 817
 818
 819 /*
 820  * this function does the actual final call and he called
 821  * from the smp code, i.e., this is the palinfo callback routine
 822  */
 823 static void
 824 palinfo_smp_call(void *info)
 825 {
 826         palinfo_smp_data_t *data = (palinfo_smp_data_t *)info;
 827         if (data == NULL) {
 828                 printk(KERN_ERR "palinfo: data pointer is NULL\n");
 829                 data->ret = 0; /* no output */
 830                 return;
 831         }
 832         /* does this actual call */
 833         data->ret = (*data->func)(data->page);
 834 }
 835
 836 /*
 837  * function called to trigger the IPI, we need to access a remote CPU
 838  * Return:
 839  *      0 : error or nothing to output
 840  *      otherwise how many bytes in the "page" buffer were written
 841  */
 842 static
 843 int palinfo_handle_smp(pal_func_cpu_u_t *f, char *page)
 844 {
 845         palinfo_smp_data_t ptr;
 846         int ret;
 847
 848         ptr.func = palinfo_entries[f->func_id].proc_read;
 849         ptr.page = page;
 850         ptr.ret  = 0; /* just in case */
 851
 852
 853         /* will send IPI to other CPU and wait for completion of remote call */
 854         if ((ret=smp_call_function_single(f->req_cpu, palinfo_smp_call, &ptr, 0, 1))) {
 855                 printk(KERN_ERR "palinfo: remote CPU call from %d to %d on function %d: "
 856                        "error %d\n", smp_processor_id(), f->req_cpu, f->func_id, ret);
 857                 return 0;
 858         }
 859         return ptr.ret;
 860 }
 861 #else /* ! CONFIG_SMP */
 862 static
 863 int palinfo_handle_smp(pal_func_cpu_u_t *f, char *page)
 864 {
 865         printk(KERN_ERR "palinfo: should not be called with non SMP kernel\n");
 866         return 0;
 867 }
 868 #endif /* CONFIG_SMP */
 869
 870 /*
 871  * Entry point routine: all calls go through this function
 872  */
 873 static int
 874 palinfo_read_entry(char *page, char **start, off_t off, int count, int *eof, void *data)
 875 {
 876         int len=0;
 877         pal_func_cpu_u_t *f = (pal_func_cpu_u_t *)&data;
 878
 879         /*
 880          * in SMP mode, we may need to call another CPU to get correct
 881          * information. PAL, by definition, is processor specific
 882          */
 883         if (f->req_cpu == get_cpu())
 884                 len = (*palinfo_entries[f->func_id].proc_read)(page);
 885         else
 886                 len = palinfo_handle_smp(f, page);
 887
 888         put_cpu();
 889
 890         if (len <= off+count) *eof = 1;
 891
 892         *start = page + off;
 893         len   -= off;
 894
 895         if (len>count) len = count;
 896         if (len<0) len = 0;
 897
 898         return len;
 899 }
 900
 901 static void
 902 create_palinfo_proc_entries(unsigned int cpu)
 903 {
 904 #       define CPUSTR   "cpu%d"
 905
 906         pal_func_cpu_u_t f;
 907         struct proc_dir_entry **pdir;
 908         struct proc_dir_entry *cpu_dir;
 909         int j;
 910         char cpustr[sizeof(CPUSTR)];
 911
 912
 913         /*
 914          * we keep track of created entries in a depth-first order for
 915          * cleanup purposes. Each entry is stored into palinfo_proc_entries
 916          */
 917         sprintf(cpustr,CPUSTR, cpu);
 918
 919         cpu_dir = proc_mkdir(cpustr, palinfo_dir);
 920
 921         f.req_cpu = cpu;
 922
 923         /*
 924          * Compute the location to store per cpu entries
 925          * We dont store the top level entry in this list, but
 926          * remove it finally after removing all cpu entries.
 927          */
 928         pdir = &palinfo_proc_entries[cpu*(NR_PALINFO_ENTRIES+1)];
 929         *pdir++ = cpu_dir;
 930         for (j=0; j < NR_PALINFO_ENTRIES; j++) {
 931                 f.func_id = j;
 932                 *pdir = create_proc_read_entry(
 933                                 palinfo_entries[j].name, 0, cpu_dir,
 934                                 palinfo_read_entry, (void *)f.value);
 935                 if (*pdir)
 936                         (*pdir)->owner = THIS_MODULE;
 937                 pdir++;
 938         }
 939 }
 940
 941 static void
 942 remove_palinfo_proc_entries(unsigned int hcpu)
 943 {
 944         int j;
 945         struct proc_dir_entry *cpu_dir, **pdir;
 946
 947         pdir = &palinfo_proc_entries[hcpu*(NR_PALINFO_ENTRIES+1)];
 948         cpu_dir = *pdir;
 949         *pdir++=NULL;
 950         for (j=0; j < (NR_PALINFO_ENTRIES); j++) {
 951                 if ((*pdir)) {
 952                         remove_proc_entry ((*pdir)->name, cpu_dir);
 953                         *pdir ++= NULL;
 954                 }
 955         }
 956
 957         if (cpu_dir) {
 958                 remove_proc_entry(cpu_dir->name, palinfo_dir);
 959         }
 960 }
 961
 962 static int __devinit palinfo_cpu_callback(struct notifier_block *nfb,
 963                                                                 unsigned long action,
 964                                                                 void *hcpu)
 965 {
 966         unsigned int hotcpu = (unsigned long)hcpu;
 967
 968         switch (action) {
 969         case CPU_ONLINE:
 970                 create_palinfo_proc_entries(hotcpu);
 971                 break;
 972 #ifdef CONFIG_HOTPLUG_CPU
 973         case CPU_DEAD:
 974                 remove_palinfo_proc_entries(hotcpu);
 975                 break;
 976 #endif
 977         }
 978         return NOTIFY_OK;
 979 }
 980
 981 static struct notifier_block palinfo_cpu_notifier =
 982 {
 983         .notifier_call = palinfo_cpu_callback,
 984         .priority = 0,
 985 };
 986
 987 static int __init
 988 palinfo_init(void)
 989 {
 990         int i = 0;
 991
 992         printk(KERN_INFO "PAL Information Facility v%s\n", PALINFO_VERSION);
 993         palinfo_dir = proc_mkdir("pal", NULL);
 994
 995         /* Create palinfo dirs in /proc for all online cpus */
 996         for_each_online_cpu(i) {
 997                 create_palinfo_proc_entries(i);
 998         }
 999
1000         /* Register for future delivery via notify registration */
1001         register_cpu_notifier(&palinfo_cpu_notifier);
1002
1003         return 0;
1004 }
1005
1006 static void __exit
1007 palinfo_exit(void)
1008 {
1009         int i = 0;
1010
1011         /* remove all nodes: depth first pass. Could optimize this  */
1012         for_each_online_cpu(i) {
1013                 remove_palinfo_proc_entries(i);
1014         }
1015
1016         /*
1017          * Remove the top level entry finally
1018          */
1019         remove_proc_entry(palinfo_dir->name, NULL);
1020
1021         /*
1022          * Unregister from cpu notifier callbacks
1023          */
1024         unregister_cpu_notifier(&palinfo_cpu_notifier);
1025 }
1026
1027 module_init(palinfo_init);
1028 module_exit(palinfo_exit);