arch/x86/kernel/es7000_32.c

   1 /*
   2  * Written by: Garry Forsgren, Unisys Corporation
   3  *             Natalie Protasevich, Unisys Corporation
   4  * This file contains the code to configure and interface
   5  * with Unisys ES7000 series hardware system manager.
   6  *
   7  * Copyright (c) 2003 Unisys Corporation.  All Rights Reserved.
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of version 2 of the GNU General Public License as
  11  * published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it would be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write the Free Software Foundation, Inc., 59
  19  * Temple Place - Suite 330, Boston MA 02111-1307, USA.
  20  *
  21  * Contact information: Unisys Corporation, Township Line & Union Meeting
  22  * Roads-A, Unisys Way, Blue Bell, Pennsylvania, 19424, or:
  23  *
  24  * http://www.unisys.com
  25  */
  26
  27 #include <linux/module.h>
  28 #include <linux/types.h>
  29 #include <linux/kernel.h>
  30 #include <linux/smp.h>
  31 #include <linux/string.h>
  32 #include <linux/spinlock.h>
  33 #include <linux/errno.h>
  34 #include <linux/notifier.h>
  35 #include <linux/reboot.h>
  36 #include <linux/init.h>
  37 #include <linux/acpi.h>
  38 #include <asm/io.h>
  39 #include <asm/nmi.h>
  40 #include <asm/smp.h>
  41 #include <asm/atomic.h>
  42 #include <asm/apicdef.h>
  43 #include <asm/apic.h>
  44 #include <asm/setup.h>
  45
  46 /*
  47  * ES7000 chipsets
  48  */
  49
  50 #define NON_UNISYS              0
  51 #define ES7000_CLASSIC          1
  52 #define ES7000_ZORRO            2
  53
  54
  55 #define MIP_REG                 1
  56 #define MIP_PSAI_REG            4
  57
  58 #define MIP_BUSY                1
  59 #define MIP_SPIN                0xf0000
  60 #define MIP_VALID               0x0100000000000000ULL
  61 #define MIP_PORT(VALUE) ((VALUE >> 32) & 0xffff)
  62
  63 #define MIP_RD_LO(VALUE)        (VALUE & 0xffffffff)
  64
  65 struct mip_reg_info {
  66         unsigned long long mip_info;
  67         unsigned long long delivery_info;
  68         unsigned long long host_reg;
  69         unsigned long long mip_reg;
  70 };
  71
  72 struct part_info {
  73         unsigned char type;
  74         unsigned char length;
  75         unsigned char part_id;
  76         unsigned char apic_mode;
  77         unsigned long snum;
  78         char ptype[16];
  79         char sname[64];
  80         char pname[64];
  81 };
  82
  83 struct psai {
  84         unsigned long long entry_type;
  85         unsigned long long addr;
  86         unsigned long long bep_addr;
  87 };
  88
  89 struct es7000_mem_info {
  90         unsigned char type;
  91         unsigned char length;
  92         unsigned char resv[6];
  93         unsigned long long  start;
  94         unsigned long long  size;
  95 };
  96
  97 struct es7000_oem_table {
  98         unsigned long long hdr;
  99         struct mip_reg_info mip;
 100         struct part_info pif;
 101         struct es7000_mem_info shm;
 102         struct psai psai;
 103 };
 104
 105 #ifdef CONFIG_ACPI
 106
 107 struct oem_table {
 108         struct acpi_table_header Header;
 109         u32 OEMTableAddr;
 110         u32 OEMTableSize;
 111 };
 112
 113 extern int find_unisys_acpi_oem_table(unsigned long *oem_addr);
 114 extern void unmap_unisys_acpi_oem_table(unsigned long oem_addr);
 115 #endif
 116
 117 struct mip_reg {
 118         unsigned long long off_0;
 119         unsigned long long off_8;
 120         unsigned long long off_10;
 121         unsigned long long off_18;
 122         unsigned long long off_20;
 123         unsigned long long off_28;
 124         unsigned long long off_30;
 125         unsigned long long off_38;
 126 };
 127
 128 #define MIP_SW_APIC             0x1020b
 129 #define MIP_FUNC(VALUE)         (VALUE & 0xff)
 130
 131 /*
 132  * ES7000 Globals
 133  */
 134
 135 static volatile unsigned long   *psai = NULL;
 136 static struct mip_reg           *mip_reg;
 137 static struct mip_reg           *host_reg;
 138 static int                      mip_port;
 139 static unsigned long            mip_addr, host_addr;
 140
 141 int es7000_plat;
 142
 143 /*
 144  * GSI override for ES7000 platforms.
 145  */
 146
 147 static unsigned int base;
 148
 149 static int
 150 es7000_rename_gsi(int ioapic, int gsi)
 151 {
 152         if (es7000_plat == ES7000_ZORRO)
 153                 return gsi;
 154
 155         if (!base) {
 156                 int i;
 157                 for (i = 0; i < nr_ioapics; i++)
 158                         base += nr_ioapic_registers[i];
 159         }
 160
 161         if (!ioapic && (gsi < 16))
 162                 gsi += base;
 163         return gsi;
 164 }
 165
 166 static int wakeup_secondary_cpu_via_mip(int cpu, unsigned long eip)
 167 {
 168         unsigned long vect = 0, psaival = 0;
 169
 170         if (psai == NULL)
 171                 return -1;
 172
 173         vect = ((unsigned long)__pa(eip)/0x1000) << 16;
 174         psaival = (0x1000000 | vect | cpu);
 175
 176         while (*psai & 0x1000000)
 177                 ;
 178
 179         *psai = psaival;
 180
 181         return 0;
 182 }
 183
 184 static int __init es7000_update_genapic(void)
 185 {
 186         apic->wakeup_cpu = wakeup_secondary_cpu_via_mip;
 187
 188         /* MPENTIUMIII */
 189         if (boot_cpu_data.x86 == 6 &&
 190             (boot_cpu_data.x86_model >= 7 || boot_cpu_data.x86_model <= 11)) {
 191                 es7000_update_genapic_to_cluster();
 192                 apic->wait_for_init_deassert = NULL;
 193                 apic->wakeup_cpu = wakeup_secondary_cpu_via_mip;
 194         }
 195
 196         return 0;
 197 }
 198
 199 void __init
 200 setup_unisys(void)
 201 {
 202         /*
 203          * Determine the generation of the ES7000 currently running.
 204          *
 205          * es7000_plat = 1 if the machine is a 5xx ES7000 box
 206          * es7000_plat = 2 if the machine is a x86_64 ES7000 box
 207          *
 208          */
 209         if (!(boot_cpu_data.x86 <= 15 && boot_cpu_data.x86_model <= 2))
 210                 es7000_plat = ES7000_ZORRO;
 211         else
 212                 es7000_plat = ES7000_CLASSIC;
 213         ioapic_renumber_irq = es7000_rename_gsi;
 214
 215         x86_quirks->update_genapic = es7000_update_genapic;
 216 }
 217
 218 /*
 219  * Parse the OEM Table
 220  */
 221
 222 int __init
 223 parse_unisys_oem (char *oemptr)
 224 {
 225         int                     i;
 226         int                     success = 0;
 227         unsigned char           type, size;
 228         unsigned long           val;
 229         char                    *tp = NULL;
 230         struct psai             *psaip = NULL;
 231         struct mip_reg_info     *mi;
 232         struct mip_reg          *host, *mip;
 233
 234         tp = oemptr;
 235
 236         tp += 8;
 237
 238         for (i=0; i <= 6; i++) {
 239                 type = *tp++;
 240                 size = *tp++;
 241                 tp -= 2;
 242                 switch (type) {
 243                 case MIP_REG:
 244                         mi = (struct mip_reg_info *)tp;
 245                         val = MIP_RD_LO(mi->host_reg);
 246                         host_addr = val;
 247                         host = (struct mip_reg *)val;
 248                         host_reg = __va(host);
 249                         val = MIP_RD_LO(mi->mip_reg);
 250                         mip_port = MIP_PORT(mi->mip_info);
 251                         mip_addr = val;
 252                         mip = (struct mip_reg *)val;
 253                         mip_reg = __va(mip);
 254                         pr_debug("es7000_mipcfg: host_reg = 0x%lx \n",
 255                                  (unsigned long)host_reg);
 256                         pr_debug("es7000_mipcfg: mip_reg = 0x%lx \n",
 257                                  (unsigned long)mip_reg);
 258                         success++;
 259                         break;
 260                 case MIP_PSAI_REG:
 261                         psaip = (struct psai *)tp;
 262                         if (tp != NULL) {
 263                                 if (psaip->addr)
 264                                         psai = __va(psaip->addr);
 265                                 else
 266                                         psai = NULL;
 267                                 success++;
 268                         }
 269                         break;
 270                 default:
 271                         break;
 272                 }
 273                 tp += size;
 274         }
 275
 276         if (success < 2) {
 277                 es7000_plat = NON_UNISYS;
 278         } else
 279                 setup_unisys();
 280         return es7000_plat;
 281 }
 282
 283 #ifdef CONFIG_ACPI
 284 static unsigned long oem_addrX;
 285 static unsigned long oem_size;
 286 int __init find_unisys_acpi_oem_table(unsigned long *oem_addr)
 287 {
 288         struct acpi_table_header *header = NULL;
 289         int i = 0;
 290         acpi_size tbl_size;
 291
 292         while (ACPI_SUCCESS(acpi_get_table_with_size("OEM1", i++, &header, &tbl_size))) {
 293                 if (!memcmp((char *) &header->oem_id, "UNISYS", 6)) {
 294                         struct oem_table *t = (struct oem_table *)header;
 295
 296                         oem_addrX = t->OEMTableAddr;
 297                         oem_size = t->OEMTableSize;
 298                         early_acpi_os_unmap_memory(header, tbl_size);
 299
 300                         *oem_addr = (unsigned long)__acpi_map_table(oem_addrX,
 301                                                                     oem_size);
 302                         return 0;
 303                 }
 304                 early_acpi_os_unmap_memory(header, tbl_size);
 305         }
 306         return -1;
 307 }
 308
 309 void __init unmap_unisys_acpi_oem_table(unsigned long oem_addr)
 310 {
 311         if (!oem_addr)
 312                 return;
 313
 314         __acpi_unmap_table((char *)oem_addr, oem_size);
 315 }
 316 #endif
 317
 318 static void
 319 es7000_spin(int n)
 320 {
 321         int i = 0;
 322
 323         while (i++ < n)
 324                 rep_nop();
 325 }
 326
 327 static int __init
 328 es7000_mip_write(struct mip_reg *mip_reg)
 329 {
 330         int                     status = 0;
 331         int                     spin;
 332
 333         spin = MIP_SPIN;
 334         while (((unsigned long long)host_reg->off_38 &
 335                 (unsigned long long)MIP_VALID) != 0) {
 336                         if (--spin <= 0) {
 337                                 printk("es7000_mip_write: Timeout waiting for Host Valid Flag");
 338                                 return -1;
 339                         }
 340                 es7000_spin(MIP_SPIN);
 341         }
 342
 343         memcpy(host_reg, mip_reg, sizeof(struct mip_reg));
 344         outb(1, mip_port);
 345
 346         spin = MIP_SPIN;
 347
 348         while (((unsigned long long)mip_reg->off_38 &
 349                 (unsigned long long)MIP_VALID) == 0) {
 350                 if (--spin <= 0) {
 351                         printk("es7000_mip_write: Timeout waiting for MIP Valid Flag");
 352                         return -1;
 353                 }
 354                 es7000_spin(MIP_SPIN);
 355         }
 356
 357         status = ((unsigned long long)mip_reg->off_0 &
 358                 (unsigned long long)0xffff0000000000ULL) >> 48;
 359         mip_reg->off_38 = ((unsigned long long)mip_reg->off_38 &
 360                 (unsigned long long)~MIP_VALID);
 361         return status;
 362 }
 363
 364 void __init es7000_enable_apic_mode(void)
 365 {
 366         struct mip_reg es7000_mip_reg;
 367         int mip_status;
 368
 369         if (!es7000_plat)
 370                 return;
 371
 372         printk("ES7000: Enabling APIC mode.\n");
 373         memset(&es7000_mip_reg, 0, sizeof(struct mip_reg));
 374         es7000_mip_reg.off_0 = MIP_SW_APIC;
 375         es7000_mip_reg.off_38 = MIP_VALID;
 376
 377         while ((mip_status = es7000_mip_write(&es7000_mip_reg)) != 0) {
 378                 printk("es7000_enable_apic_mode: command failed, status = %x\n",
 379                         mip_status);
 380         }
 381 }
 382
 383 /*
 384  * APIC driver for the Unisys ES7000 chipset.
 385  */
 386 #define APIC_DEFINITION 1
 387 #include <linux/threads.h>
 388 #include <linux/cpumask.h>
 389 #include <asm/mpspec.h>
 390 #include <asm/apic.h>
 391 #include <asm/fixmap.h>
 392 #include <asm/apicdef.h>
 393 #include <linux/kernel.h>
 394 #include <linux/string.h>
 395 #include <linux/init.h>
 396 #include <linux/acpi.h>
 397 #include <linux/smp.h>
 398 #include <asm/ipi.h>
 399
 400 #define APIC_DFR_VALUE_CLUSTER          (APIC_DFR_CLUSTER)
 401 #define INT_DELIVERY_MODE_CLUSTER       (dest_LowestPrio)
 402 #define INT_DEST_MODE_CLUSTER           (1) /* logical delivery broadcast to all procs */
 403
 404 #define APIC_DFR_VALUE                  (APIC_DFR_FLAT)
 405
 406 extern void es7000_enable_apic_mode(void);
 407 extern int apic_version [MAX_APICS];
 408 extern u8 cpu_2_logical_apicid[];
 409 extern unsigned int boot_cpu_physical_apicid;
 410
 411 extern int parse_unisys_oem (char *oemptr);
 412 extern int find_unisys_acpi_oem_table(unsigned long *oem_addr);
 413 extern void unmap_unisys_acpi_oem_table(unsigned long oem_addr);
 414 extern void setup_unisys(void);
 415
 416 #define apicid_cluster(apicid)          (apicid & 0xF0)
 417 #define xapic_phys_to_log_apicid(cpu)   per_cpu(x86_bios_cpu_apicid, cpu)
 418
 419 static void es7000_vector_allocation_domain(int cpu, cpumask_t *retmask)
 420 {
 421         /* Careful. Some cpus do not strictly honor the set of cpus
 422          * specified in the interrupt destination when using lowest
 423          * priority interrupt delivery mode.
 424          *
 425          * In particular there was a hyperthreading cpu observed to
 426          * deliver interrupts to the wrong hyperthread when only one
 427          * hyperthread was specified in the interrupt desitination.
 428          */
 429         *retmask = (cpumask_t){ { [0] = APIC_ALL_CPUS, } };
 430 }
 431
 432
 433 static void es7000_wait_for_init_deassert(atomic_t *deassert)
 434 {
 435 #ifndef CONFIG_ES7000_CLUSTERED_APIC
 436         while (!atomic_read(deassert))
 437                 cpu_relax();
 438 #endif
 439         return;
 440 }
 441
 442 static unsigned int es7000_get_apic_id(unsigned long x)
 443 {
 444         return (x >> 24) & 0xFF;
 445 }
 446
 447 #ifdef CONFIG_ACPI
 448 static int es7000_check_dsdt(void)
 449 {
 450         struct acpi_table_header header;
 451
 452         if (ACPI_SUCCESS(acpi_get_table_header(ACPI_SIG_DSDT, 0, &header)) &&
 453             !strncmp(header.oem_id, "UNISYS", 6))
 454                 return 1;
 455         return 0;
 456 }
 457 #endif
 458
 459 static void es7000_send_IPI_mask(const struct cpumask *mask, int vector)
 460 {
 461         default_send_IPI_mask_sequence_phys(mask, vector);
 462 }
 463
 464 static void es7000_send_IPI_allbutself(int vector)
 465 {
 466         default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
 467 }
 468
 469 static void es7000_send_IPI_all(int vector)
 470 {
 471         es7000_send_IPI_mask(cpu_online_mask, vector);
 472 }
 473
 474 static int es7000_apic_id_registered(void)
 475 {
 476                 return 1;
 477 }
 478
 479 static const cpumask_t *target_cpus_cluster(void)
 480 {
 481         return &CPU_MASK_ALL;
 482 }
 483
 484 static const cpumask_t *es7000_target_cpus(void)
 485 {
 486         return &cpumask_of_cpu(smp_processor_id());
 487 }
 488
 489 static unsigned long
 490 es7000_check_apicid_used(physid_mask_t bitmap, int apicid)
 491 {
 492         return 0;
 493 }
 494 static unsigned long es7000_check_apicid_present(int bit)
 495 {
 496         return physid_isset(bit, phys_cpu_present_map);
 497 }
 498
 499 static unsigned long calculate_ldr(int cpu)
 500 {
 501         unsigned long id = xapic_phys_to_log_apicid(cpu);
 502
 503         return (SET_APIC_LOGICAL_ID(id));
 504 }
 505
 506 /*
 507  * Set up the logical destination ID.
 508  *
 509  * Intel recommends to set DFR, LdR and TPR before enabling
 510  * an APIC.  See e.g. "AP-388 82489DX User's Manual" (Intel
 511  * document number 292116).  So here it goes...
 512  */
 513 static void es7000_init_apic_ldr_cluster(void)
 514 {
 515         unsigned long val;
 516         int cpu = smp_processor_id();
 517
 518         apic_write(APIC_DFR, APIC_DFR_VALUE_CLUSTER);
 519         val = calculate_ldr(cpu);
 520         apic_write(APIC_LDR, val);
 521 }
 522
 523 static void es7000_init_apic_ldr(void)
 524 {
 525         unsigned long val;
 526         int cpu = smp_processor_id();
 527
 528         apic_write(APIC_DFR, APIC_DFR_VALUE);
 529         val = calculate_ldr(cpu);
 530         apic_write(APIC_LDR, val);
 531 }
 532
 533 static void es7000_setup_apic_routing(void)
 534 {
 535         int apic = per_cpu(x86_bios_cpu_apicid, smp_processor_id());
 536         printk("Enabling APIC mode:  %s. Using %d I/O APICs, target cpus %lx\n",
 537                 (apic_version[apic] == 0x14) ?
 538                         "Physical Cluster" : "Logical Cluster",
 539                         nr_ioapics, cpus_addr(*es7000_target_cpus())[0]);
 540 }
 541
 542 static int es7000_apicid_to_node(int logical_apicid)
 543 {
 544         return 0;
 545 }
 546
 547
 548 static int es7000_cpu_present_to_apicid(int mps_cpu)
 549 {
 550         if (!mps_cpu)
 551                 return boot_cpu_physical_apicid;
 552         else if (mps_cpu < nr_cpu_ids)
 553                 return (int) per_cpu(x86_bios_cpu_apicid, mps_cpu);
 554         else
 555                 return BAD_APICID;
 556 }
 557
 558 static physid_mask_t es7000_apicid_to_cpu_present(int phys_apicid)
 559 {
 560         static int id = 0;
 561         physid_mask_t mask;
 562
 563         mask = physid_mask_of_physid(id);
 564         ++id;
 565
 566         return mask;
 567 }
 568
 569 /* Mapping from cpu number to logical apicid */
 570 static int es7000_cpu_to_logical_apicid(int cpu)
 571 {
 572 #ifdef CONFIG_SMP
 573         if (cpu >= nr_cpu_ids)
 574                 return BAD_APICID;
 575         return (int)cpu_2_logical_apicid[cpu];
 576 #else
 577         return logical_smp_processor_id();
 578 #endif
 579 }
 580
 581 static physid_mask_t es7000_ioapic_phys_id_map(physid_mask_t phys_map)
 582 {
 583         /* For clustered we don't have a good way to do this yet - hack */
 584         return physids_promote(0xff);
 585 }
 586
 587 static int es7000_check_phys_apicid_present(int cpu_physical_apicid)
 588 {
 589         boot_cpu_physical_apicid = read_apic_id();
 590         return (1);
 591 }
 592
 593 static unsigned int
 594 es7000_cpu_mask_to_apicid_cluster(const struct cpumask *cpumask)
 595 {
 596         int cpus_found = 0;
 597         int num_bits_set;
 598         int apicid;
 599         int cpu;
 600
 601         num_bits_set = cpumask_weight(cpumask);
 602         /* Return id to all */
 603         if (num_bits_set == nr_cpu_ids)
 604                 return 0xFF;
 605         /*
 606          * The cpus in the mask must all be on the apic cluster.  If are not
 607          * on the same apicid cluster return default value of target_cpus():
 608          */
 609         cpu = cpumask_first(cpumask);
 610         apicid = es7000_cpu_to_logical_apicid(cpu);
 611
 612         while (cpus_found < num_bits_set) {
 613                 if (cpumask_test_cpu(cpu, cpumask)) {
 614                         int new_apicid = es7000_cpu_to_logical_apicid(cpu);
 615
 616                         if (apicid_cluster(apicid) !=
 617                                         apicid_cluster(new_apicid)) {
 618                                 printk ("%s: Not a valid mask!\n", __func__);
 619
 620                                 return 0xFF;
 621                         }
 622                         apicid = new_apicid;
 623                         cpus_found++;
 624                 }
 625                 cpu++;
 626         }
 627         return apicid;
 628 }
 629
 630 static unsigned int es7000_cpu_mask_to_apicid(const cpumask_t *cpumask)
 631 {
 632         int cpus_found = 0;
 633         int num_bits_set;
 634         int apicid;
 635         int cpu;
 636
 637         num_bits_set = cpus_weight(*cpumask);
 638         /* Return id to all */
 639         if (num_bits_set == nr_cpu_ids)
 640                 return es7000_cpu_to_logical_apicid(0);
 641         /*
 642          * The cpus in the mask must all be on the apic cluster.  If are not
 643          * on the same apicid cluster return default value of target_cpus():
 644          */
 645         cpu = first_cpu(*cpumask);
 646         apicid = es7000_cpu_to_logical_apicid(cpu);
 647         while (cpus_found < num_bits_set) {
 648                 if (cpu_isset(cpu, *cpumask)) {
 649                         int new_apicid = es7000_cpu_to_logical_apicid(cpu);
 650
 651                         if (apicid_cluster(apicid) !=
 652                                         apicid_cluster(new_apicid)) {
 653                                 printk ("%s: Not a valid mask!\n", __func__);
 654
 655                                 return es7000_cpu_to_logical_apicid(0);
 656                         }
 657                         apicid = new_apicid;
 658                         cpus_found++;
 659                 }
 660                 cpu++;
 661         }
 662         return apicid;
 663 }
 664
 665 static unsigned int
 666 es7000_cpu_mask_to_apicid_and(const struct cpumask *inmask,
 667                               const struct cpumask *andmask)
 668 {
 669         int apicid = es7000_cpu_to_logical_apicid(0);
 670         cpumask_var_t cpumask;
 671
 672         if (!alloc_cpumask_var(&cpumask, GFP_ATOMIC))
 673                 return apicid;
 674
 675         cpumask_and(cpumask, inmask, andmask);
 676         cpumask_and(cpumask, cpumask, cpu_online_mask);
 677         apicid = es7000_cpu_mask_to_apicid(cpumask);
 678
 679         free_cpumask_var(cpumask);
 680
 681         return apicid;
 682 }
 683
 684 static int es7000_phys_pkg_id(int cpuid_apic, int index_msb)
 685 {
 686         return cpuid_apic >> index_msb;
 687 }
 688
 689 void __init es7000_update_genapic_to_cluster(void)
 690 {
 691         apic->target_cpus = target_cpus_cluster;
 692         apic->irq_delivery_mode = INT_DELIVERY_MODE_CLUSTER;
 693         apic->irq_dest_mode = INT_DEST_MODE_CLUSTER;
 694
 695         apic->init_apic_ldr = es7000_init_apic_ldr_cluster;
 696
 697         apic->cpu_mask_to_apicid = es7000_cpu_mask_to_apicid_cluster;
 698 }
 699
 700 static int probe_es7000(void)
 701 {
 702         /* probed later in mptable/ACPI hooks */
 703         return 0;
 704 }
 705
 706 static __init int
 707 es7000_mps_oem_check(struct mpc_table *mpc, char *oem, char *productid)
 708 {
 709         if (mpc->oemptr) {
 710                 struct mpc_oemtable *oem_table =
 711                         (struct mpc_oemtable *)mpc->oemptr;
 712
 713                 if (!strncmp(oem, "UNISYS", 6))
 714                         return parse_unisys_oem((char *)oem_table);
 715         }
 716         return 0;
 717 }
 718
 719 #ifdef CONFIG_ACPI
 720 /* Hook from generic ACPI tables.c */
 721 static int __init es7000_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 722 {
 723         unsigned long oem_addr = 0;
 724         int check_dsdt;
 725         int ret = 0;
 726
 727         /* check dsdt at first to avoid clear fix_map for oem_addr */
 728         check_dsdt = es7000_check_dsdt();
 729
 730         if (!find_unisys_acpi_oem_table(&oem_addr)) {
 731                 if (check_dsdt)
 732                         ret = parse_unisys_oem((char *)oem_addr);
 733                 else {
 734                         setup_unisys();
 735                         ret = 1;
 736                 }
 737                 /*
 738                  * we need to unmap it
 739                  */
 740                 unmap_unisys_acpi_oem_table(oem_addr);
 741         }
 742         return ret;
 743 }
 744 #else
 745 static int __init es7000_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 746 {
 747         return 0;
 748 }
 749 #endif
 750
 751
 752 struct genapic apic_es7000 = {
 753
 754         .name                           = "es7000",
 755         .probe                          = probe_es7000,
 756         .acpi_madt_oem_check            = es7000_acpi_madt_oem_check,
 757         .apic_id_registered             = es7000_apic_id_registered,
 758
 759         .irq_delivery_mode              = dest_Fixed,
 760         /* phys delivery to target CPUs: */
 761         .irq_dest_mode                  = 0,
 762
 763         .target_cpus                    = es7000_target_cpus,
 764         .disable_esr                    = 1,
 765         .dest_logical                   = 0,
 766         .check_apicid_used              = es7000_check_apicid_used,
 767         .check_apicid_present           = es7000_check_apicid_present,
 768
 769         .vector_allocation_domain       = es7000_vector_allocation_domain,
 770         .init_apic_ldr                  = es7000_init_apic_ldr,
 771
 772         .ioapic_phys_id_map             = es7000_ioapic_phys_id_map,
 773         .setup_apic_routing             = es7000_setup_apic_routing,
 774         .multi_timer_check              = NULL,
 775         .apicid_to_node                 = es7000_apicid_to_node,
 776         .cpu_to_logical_apicid          = es7000_cpu_to_logical_apicid,
 777         .cpu_present_to_apicid          = es7000_cpu_present_to_apicid,
 778         .apicid_to_cpu_present          = es7000_apicid_to_cpu_present,
 779         .setup_portio_remap             = NULL,
 780         .check_phys_apicid_present      = es7000_check_phys_apicid_present,
 781         .enable_apic_mode               = es7000_enable_apic_mode,
 782         .phys_pkg_id                    = es7000_phys_pkg_id,
 783         .mps_oem_check                  = es7000_mps_oem_check,
 784
 785         .get_apic_id                    = es7000_get_apic_id,
 786         .set_apic_id                    = NULL,
 787         .apic_id_mask                   = 0xFF << 24,
 788
 789         .cpu_mask_to_apicid             = es7000_cpu_mask_to_apicid,
 790         .cpu_mask_to_apicid_and         = es7000_cpu_mask_to_apicid_and,
 791
 792         .send_IPI_mask                  = es7000_send_IPI_mask,
 793         .send_IPI_mask_allbutself       = NULL,
 794         .send_IPI_allbutself            = es7000_send_IPI_allbutself,
 795         .send_IPI_all                   = es7000_send_IPI_all,
 796         .send_IPI_self                  = default_send_IPI_self,
 797
 798         .wakeup_cpu                     = NULL,
 799
 800         .trampoline_phys_low            = 0x467,
 801         .trampoline_phys_high           = 0x469,
 802
 803         .wait_for_init_deassert         = es7000_wait_for_init_deassert,
 804
 805         /* Nothing to do for most platforms, since cleared by the INIT cycle: */
 806         .smp_callin_clear_local_apic    = NULL,
 807         .store_NMI_vector               = NULL,
 808         .inquire_remote_apic            = default_inquire_remote_apic,
 809
 810         .read                           = native_apic_mem_read,
 811         .write                          = native_apic_mem_write,
 812         .icr_read                       = native_apic_icr_read,
 813         .icr_write                      = native_apic_icr_write,
 814         .wait_icr_idle                  = native_apic_wait_icr_idle,
 815         .safe_wait_icr_idle             = native_safe_apic_wait_icr_idle,
 816 };