Merge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[sfrench/cifs-2.6.git] / arch / x86 / kernel / apic / es7000_32.c
1 /*
2  * Written by: Garry Forsgren, Unisys Corporation
3  *             Natalie Protasevich, Unisys Corporation
4  *
5  * This file contains the code to configure and interface
6  * with Unisys ES7000 series hardware system manager.
7  *
8  * Copyright (c) 2003 Unisys Corporation.
9  * Copyright (C) 2009, Red Hat, Inc., Ingo Molnar
10  *
11  *   All Rights Reserved.
12  *
13  * This program is free software; you can redistribute it and/or modify it
14  * under the terms of version 2 of the GNU General Public License as
15  * published by the Free Software Foundation.
16  *
17  * This program is distributed in the hope that it would be useful, but
18  * WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
20  *
21  * You should have received a copy of the GNU General Public License along
22  * with this program; if not, write the Free Software Foundation, Inc., 59
23  * Temple Place - Suite 330, Boston MA 02111-1307, USA.
24  *
25  * Contact information: Unisys Corporation, Township Line & Union Meeting
26  * Roads-A, Unisys Way, Blue Bell, Pennsylvania, 19424, or:
27  *
28  * http://www.unisys.com
29  */
30
31 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
32
33 #include <linux/notifier.h>
34 #include <linux/spinlock.h>
35 #include <linux/cpumask.h>
36 #include <linux/threads.h>
37 #include <linux/kernel.h>
38 #include <linux/module.h>
39 #include <linux/reboot.h>
40 #include <linux/string.h>
41 #include <linux/types.h>
42 #include <linux/errno.h>
43 #include <linux/acpi.h>
44 #include <linux/init.h>
45 #include <linux/gfp.h>
46 #include <linux/nmi.h>
47 #include <linux/smp.h>
48 #include <linux/io.h>
49
50 #include <asm/apicdef.h>
51 #include <linux/atomic.h>
52 #include <asm/fixmap.h>
53 #include <asm/mpspec.h>
54 #include <asm/setup.h>
55 #include <asm/apic.h>
56 #include <asm/ipi.h>
57
58 /*
59  * ES7000 chipsets
60  */
61
62 #define NON_UNISYS                      0
63 #define ES7000_CLASSIC                  1
64 #define ES7000_ZORRO                    2
65
66 #define MIP_REG                         1
67 #define MIP_PSAI_REG                    4
68
69 #define MIP_BUSY                        1
70 #define MIP_SPIN                        0xf0000
71 #define MIP_VALID                       0x0100000000000000ULL
72 #define MIP_SW_APIC                     0x1020b
73
74 #define MIP_PORT(val)                   ((val >> 32) & 0xffff)
75
76 #define MIP_RD_LO(val)                  (val & 0xffffffff)
77
78 struct mip_reg {
79         unsigned long long              off_0x00;
80         unsigned long long              off_0x08;
81         unsigned long long              off_0x10;
82         unsigned long long              off_0x18;
83         unsigned long long              off_0x20;
84         unsigned long long              off_0x28;
85         unsigned long long              off_0x30;
86         unsigned long long              off_0x38;
87 };
88
89 struct mip_reg_info {
90         unsigned long long              mip_info;
91         unsigned long long              delivery_info;
92         unsigned long long              host_reg;
93         unsigned long long              mip_reg;
94 };
95
96 struct psai {
97         unsigned long long              entry_type;
98         unsigned long long              addr;
99         unsigned long long              bep_addr;
100 };
101
102 #ifdef CONFIG_ACPI
103
104 struct es7000_oem_table {
105         struct acpi_table_header        Header;
106         u32                             OEMTableAddr;
107         u32                             OEMTableSize;
108 };
109
110 static unsigned long                    oem_addrX;
111 static unsigned long                    oem_size;
112
113 #endif
114
115 /*
116  * ES7000 Globals
117  */
118
119 static volatile unsigned long           *psai;
120 static struct mip_reg                   *mip_reg;
121 static struct mip_reg                   *host_reg;
122 static int                              mip_port;
123 static unsigned long                    mip_addr;
124 static unsigned long                    host_addr;
125
126 int                                     es7000_plat;
127
128 /*
129  * GSI override for ES7000 platforms.
130  */
131
132
133 static int wakeup_secondary_cpu_via_mip(int cpu, unsigned long eip)
134 {
135         unsigned long vect = 0, psaival = 0;
136
137         if (psai == NULL)
138                 return -1;
139
140         vect = ((unsigned long)__pa(eip)/0x1000) << 16;
141         psaival = (0x1000000 | vect | cpu);
142
143         while (*psai & 0x1000000)
144                 ;
145
146         *psai = psaival;
147
148         return 0;
149 }
150
151 static int es7000_apic_is_cluster(void)
152 {
153         /* MPENTIUMIII */
154         if (boot_cpu_data.x86 == 6 &&
155             (boot_cpu_data.x86_model >= 7 && boot_cpu_data.x86_model <= 11))
156                 return 1;
157
158         return 0;
159 }
160
161 static void setup_unisys(void)
162 {
163         /*
164          * Determine the generation of the ES7000 currently running.
165          *
166          * es7000_plat = 1 if the machine is a 5xx ES7000 box
167          * es7000_plat = 2 if the machine is a x86_64 ES7000 box
168          *
169          */
170         if (!(boot_cpu_data.x86 <= 15 && boot_cpu_data.x86_model <= 2))
171                 es7000_plat = ES7000_ZORRO;
172         else
173                 es7000_plat = ES7000_CLASSIC;
174 }
175
176 /*
177  * Parse the OEM Table:
178  */
179 static int parse_unisys_oem(char *oemptr)
180 {
181         int                     i;
182         int                     success = 0;
183         unsigned char           type, size;
184         unsigned long           val;
185         char                    *tp = NULL;
186         struct psai             *psaip = NULL;
187         struct mip_reg_info     *mi;
188         struct mip_reg          *host, *mip;
189
190         tp = oemptr;
191
192         tp += 8;
193
194         for (i = 0; i <= 6; i++) {
195                 type = *tp++;
196                 size = *tp++;
197                 tp -= 2;
198                 switch (type) {
199                 case MIP_REG:
200                         mi = (struct mip_reg_info *)tp;
201                         val = MIP_RD_LO(mi->host_reg);
202                         host_addr = val;
203                         host = (struct mip_reg *)val;
204                         host_reg = __va(host);
205                         val = MIP_RD_LO(mi->mip_reg);
206                         mip_port = MIP_PORT(mi->mip_info);
207                         mip_addr = val;
208                         mip = (struct mip_reg *)val;
209                         mip_reg = __va(mip);
210                         pr_debug("host_reg = 0x%lx\n",
211                                  (unsigned long)host_reg);
212                         pr_debug("mip_reg = 0x%lx\n",
213                                  (unsigned long)mip_reg);
214                         success++;
215                         break;
216                 case MIP_PSAI_REG:
217                         psaip = (struct psai *)tp;
218                         if (tp != NULL) {
219                                 if (psaip->addr)
220                                         psai = __va(psaip->addr);
221                                 else
222                                         psai = NULL;
223                                 success++;
224                         }
225                         break;
226                 default:
227                         break;
228                 }
229                 tp += size;
230         }
231
232         if (success < 2)
233                 es7000_plat = NON_UNISYS;
234         else
235                 setup_unisys();
236
237         return es7000_plat;
238 }
239
240 #ifdef CONFIG_ACPI
241 static int __init find_unisys_acpi_oem_table(unsigned long *oem_addr)
242 {
243         struct acpi_table_header *header = NULL;
244         struct es7000_oem_table *table;
245         acpi_size tbl_size;
246         acpi_status ret;
247         int i = 0;
248
249         for (;;) {
250                 ret = acpi_get_table_with_size("OEM1", i++, &header, &tbl_size);
251                 if (!ACPI_SUCCESS(ret))
252                         return -1;
253
254                 if (!memcmp((char *) &header->oem_id, "UNISYS", 6))
255                         break;
256
257                 early_acpi_os_unmap_memory(header, tbl_size);
258         }
259
260         table = (void *)header;
261
262         oem_addrX       = table->OEMTableAddr;
263         oem_size        = table->OEMTableSize;
264
265         early_acpi_os_unmap_memory(header, tbl_size);
266
267         *oem_addr       = (unsigned long)__acpi_map_table(oem_addrX, oem_size);
268
269         return 0;
270 }
271
272 static void __init unmap_unisys_acpi_oem_table(unsigned long oem_addr)
273 {
274         if (!oem_addr)
275                 return;
276
277         __acpi_unmap_table((char *)oem_addr, oem_size);
278 }
279
280 static int es7000_check_dsdt(void)
281 {
282         struct acpi_table_header header;
283
284         if (ACPI_SUCCESS(acpi_get_table_header(ACPI_SIG_DSDT, 0, &header)) &&
285             !strncmp(header.oem_id, "UNISYS", 6))
286                 return 1;
287         return 0;
288 }
289
290 static int es7000_acpi_ret;
291
292 /* Hook from generic ACPI tables.c */
293 static int __init es7000_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
294 {
295         unsigned long oem_addr = 0;
296         int check_dsdt;
297         int ret = 0;
298
299         /* check dsdt at first to avoid clear fix_map for oem_addr */
300         check_dsdt = es7000_check_dsdt();
301
302         if (!find_unisys_acpi_oem_table(&oem_addr)) {
303                 if (check_dsdt) {
304                         ret = parse_unisys_oem((char *)oem_addr);
305                 } else {
306                         setup_unisys();
307                         ret = 1;
308                 }
309                 /*
310                  * we need to unmap it
311                  */
312                 unmap_unisys_acpi_oem_table(oem_addr);
313         }
314
315         es7000_acpi_ret = ret;
316
317         return ret && !es7000_apic_is_cluster();
318 }
319
320 static int es7000_acpi_madt_oem_check_cluster(char *oem_id, char *oem_table_id)
321 {
322         int ret = es7000_acpi_ret;
323
324         return ret && es7000_apic_is_cluster();
325 }
326
327 #else /* !CONFIG_ACPI: */
328 static int es7000_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
329 {
330         return 0;
331 }
332
333 static int es7000_acpi_madt_oem_check_cluster(char *oem_id, char *oem_table_id)
334 {
335         return 0;
336 }
337 #endif /* !CONFIG_ACPI */
338
339 static void es7000_spin(int n)
340 {
341         int i = 0;
342
343         while (i++ < n)
344                 rep_nop();
345 }
346
347 static int es7000_mip_write(struct mip_reg *mip_reg)
348 {
349         int status = 0;
350         int spin;
351
352         spin = MIP_SPIN;
353         while ((host_reg->off_0x38 & MIP_VALID) != 0) {
354                 if (--spin <= 0) {
355                         WARN(1, "Timeout waiting for Host Valid Flag\n");
356                         return -1;
357                 }
358                 es7000_spin(MIP_SPIN);
359         }
360
361         memcpy(host_reg, mip_reg, sizeof(struct mip_reg));
362         outb(1, mip_port);
363
364         spin = MIP_SPIN;
365
366         while ((mip_reg->off_0x38 & MIP_VALID) == 0) {
367                 if (--spin <= 0) {
368                         WARN(1, "Timeout waiting for MIP Valid Flag\n");
369                         return -1;
370                 }
371                 es7000_spin(MIP_SPIN);
372         }
373
374         status = (mip_reg->off_0x00 & 0xffff0000000000ULL) >> 48;
375         mip_reg->off_0x38 &= ~MIP_VALID;
376
377         return status;
378 }
379
380 static void es7000_enable_apic_mode(void)
381 {
382         struct mip_reg es7000_mip_reg;
383         int mip_status;
384
385         if (!es7000_plat)
386                 return;
387
388         pr_info("Enabling APIC mode.\n");
389         memset(&es7000_mip_reg, 0, sizeof(struct mip_reg));
390         es7000_mip_reg.off_0x00 = MIP_SW_APIC;
391         es7000_mip_reg.off_0x38 = MIP_VALID;
392
393         while ((mip_status = es7000_mip_write(&es7000_mip_reg)) != 0)
394                 WARN(1, "Command failed, status = %x\n", mip_status);
395 }
396
397 static unsigned int es7000_get_apic_id(unsigned long x)
398 {
399         return (x >> 24) & 0xFF;
400 }
401
402 static void es7000_send_IPI_mask(const struct cpumask *mask, int vector)
403 {
404         default_send_IPI_mask_sequence_phys(mask, vector);
405 }
406
407 static void es7000_send_IPI_allbutself(int vector)
408 {
409         default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
410 }
411
412 static void es7000_send_IPI_all(int vector)
413 {
414         es7000_send_IPI_mask(cpu_online_mask, vector);
415 }
416
417 static int es7000_apic_id_registered(void)
418 {
419         return 1;
420 }
421
422 static const struct cpumask *target_cpus_cluster(void)
423 {
424         return cpu_all_mask;
425 }
426
427 static const struct cpumask *es7000_target_cpus(void)
428 {
429         return cpumask_of(smp_processor_id());
430 }
431
432 static unsigned long es7000_check_apicid_used(physid_mask_t *map, int apicid)
433 {
434         return 0;
435 }
436
437 static unsigned long es7000_check_apicid_present(int bit)
438 {
439         return physid_isset(bit, phys_cpu_present_map);
440 }
441
442 static int es7000_early_logical_apicid(int cpu)
443 {
444         /* on es7000, logical apicid is the same as physical */
445         return early_per_cpu(x86_bios_cpu_apicid, cpu);
446 }
447
448 static unsigned long calculate_ldr(int cpu)
449 {
450         unsigned long id = per_cpu(x86_bios_cpu_apicid, cpu);
451
452         return SET_APIC_LOGICAL_ID(id);
453 }
454
455 /*
456  * Set up the logical destination ID.
457  *
458  * Intel recommends to set DFR, LdR and TPR before enabling
459  * an APIC.  See e.g. "AP-388 82489DX User's Manual" (Intel
460  * document number 292116).  So here it goes...
461  */
462 static void es7000_init_apic_ldr_cluster(void)
463 {
464         unsigned long val;
465         int cpu = smp_processor_id();
466
467         apic_write(APIC_DFR, APIC_DFR_CLUSTER);
468         val = calculate_ldr(cpu);
469         apic_write(APIC_LDR, val);
470 }
471
472 static void es7000_init_apic_ldr(void)
473 {
474         unsigned long val;
475         int cpu = smp_processor_id();
476
477         apic_write(APIC_DFR, APIC_DFR_FLAT);
478         val = calculate_ldr(cpu);
479         apic_write(APIC_LDR, val);
480 }
481
482 static void es7000_setup_apic_routing(void)
483 {
484         int apic = per_cpu(x86_bios_cpu_apicid, smp_processor_id());
485
486         pr_info("Enabling APIC mode:  %s. Using %d I/O APICs, target cpus %lx\n",
487                 (apic_version[apic] == 0x14) ?
488                         "Physical Cluster" : "Logical Cluster",
489                 nr_ioapics, cpumask_bits(es7000_target_cpus())[0]);
490 }
491
492 static int es7000_cpu_present_to_apicid(int mps_cpu)
493 {
494         if (!mps_cpu)
495                 return boot_cpu_physical_apicid;
496         else if (mps_cpu < nr_cpu_ids)
497                 return per_cpu(x86_bios_cpu_apicid, mps_cpu);
498         else
499                 return BAD_APICID;
500 }
501
502 static int cpu_id;
503
504 static void es7000_apicid_to_cpu_present(int phys_apicid, physid_mask_t *retmap)
505 {
506         physid_set_mask_of_physid(cpu_id, retmap);
507         ++cpu_id;
508 }
509
510 static void es7000_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
511 {
512         /* For clustered we don't have a good way to do this yet - hack */
513         physids_promote(0xFFL, retmap);
514 }
515
516 static int es7000_check_phys_apicid_present(int cpu_physical_apicid)
517 {
518         boot_cpu_physical_apicid = read_apic_id();
519         return 1;
520 }
521
522 static inline int
523 es7000_cpu_mask_to_apicid(const struct cpumask *cpumask, unsigned int *dest_id)
524 {
525         unsigned int round = 0;
526         unsigned int cpu, uninitialized_var(apicid);
527
528         /*
529          * The cpus in the mask must all be on the apic cluster.
530          */
531         for_each_cpu_and(cpu, cpumask, cpu_online_mask) {
532                 int new_apicid = early_per_cpu(x86_cpu_to_logical_apicid, cpu);
533
534                 if (round && APIC_CLUSTER(apicid) != APIC_CLUSTER(new_apicid)) {
535                         WARN(1, "Not a valid mask!");
536
537                         return -EINVAL;
538                 }
539                 apicid |= new_apicid;
540                 round++;
541         }
542         if (!round)
543                 return -EINVAL;
544         *dest_id = apicid;
545         return 0;
546 }
547
548 static int
549 es7000_cpu_mask_to_apicid_and(const struct cpumask *inmask,
550                               const struct cpumask *andmask,
551                               unsigned int *apicid)
552 {
553         cpumask_var_t cpumask;
554         *apicid = early_per_cpu(x86_cpu_to_logical_apicid, 0);
555
556         if (!alloc_cpumask_var(&cpumask, GFP_ATOMIC))
557                 return 0;
558
559         cpumask_and(cpumask, inmask, andmask);
560         es7000_cpu_mask_to_apicid(cpumask, apicid);
561
562         free_cpumask_var(cpumask);
563
564         return 0;
565 }
566
567 static int es7000_phys_pkg_id(int cpuid_apic, int index_msb)
568 {
569         return cpuid_apic >> index_msb;
570 }
571
572 static int probe_es7000(void)
573 {
574         /* probed later in mptable/ACPI hooks */
575         return 0;
576 }
577
578 static int es7000_mps_ret;
579 static int es7000_mps_oem_check(struct mpc_table *mpc, char *oem,
580                 char *productid)
581 {
582         int ret = 0;
583
584         if (mpc->oemptr) {
585                 struct mpc_oemtable *oem_table =
586                         (struct mpc_oemtable *)mpc->oemptr;
587
588                 if (!strncmp(oem, "UNISYS", 6))
589                         ret = parse_unisys_oem((char *)oem_table);
590         }
591
592         es7000_mps_ret = ret;
593
594         return ret && !es7000_apic_is_cluster();
595 }
596
597 static int es7000_mps_oem_check_cluster(struct mpc_table *mpc, char *oem,
598                 char *productid)
599 {
600         int ret = es7000_mps_ret;
601
602         return ret && es7000_apic_is_cluster();
603 }
604
605 /* We've been warned by a false positive warning.Use __refdata to keep calm. */
606 static struct apic __refdata apic_es7000_cluster = {
607
608         .name                           = "es7000",
609         .probe                          = probe_es7000,
610         .acpi_madt_oem_check            = es7000_acpi_madt_oem_check_cluster,
611         .apic_id_valid                  = default_apic_id_valid,
612         .apic_id_registered             = es7000_apic_id_registered,
613
614         .irq_delivery_mode              = dest_LowestPrio,
615         /* logical delivery broadcast to all procs: */
616         .irq_dest_mode                  = 1,
617
618         .target_cpus                    = target_cpus_cluster,
619         .disable_esr                    = 1,
620         .dest_logical                   = 0,
621         .check_apicid_used              = es7000_check_apicid_used,
622         .check_apicid_present           = es7000_check_apicid_present,
623
624         .vector_allocation_domain       = flat_vector_allocation_domain,
625         .init_apic_ldr                  = es7000_init_apic_ldr_cluster,
626
627         .ioapic_phys_id_map             = es7000_ioapic_phys_id_map,
628         .setup_apic_routing             = es7000_setup_apic_routing,
629         .multi_timer_check              = NULL,
630         .cpu_present_to_apicid          = es7000_cpu_present_to_apicid,
631         .apicid_to_cpu_present          = es7000_apicid_to_cpu_present,
632         .setup_portio_remap             = NULL,
633         .check_phys_apicid_present      = es7000_check_phys_apicid_present,
634         .enable_apic_mode               = es7000_enable_apic_mode,
635         .phys_pkg_id                    = es7000_phys_pkg_id,
636         .mps_oem_check                  = es7000_mps_oem_check_cluster,
637
638         .get_apic_id                    = es7000_get_apic_id,
639         .set_apic_id                    = NULL,
640         .apic_id_mask                   = 0xFF << 24,
641
642         .cpu_mask_to_apicid_and         = es7000_cpu_mask_to_apicid_and,
643
644         .send_IPI_mask                  = es7000_send_IPI_mask,
645         .send_IPI_mask_allbutself       = NULL,
646         .send_IPI_allbutself            = es7000_send_IPI_allbutself,
647         .send_IPI_all                   = es7000_send_IPI_all,
648         .send_IPI_self                  = default_send_IPI_self,
649
650         .wakeup_secondary_cpu           = wakeup_secondary_cpu_via_mip,
651
652         .trampoline_phys_low            = 0x467,
653         .trampoline_phys_high           = 0x469,
654
655         .wait_for_init_deassert         = false,
656         /* Nothing to do for most platforms, since cleared by the INIT cycle: */
657         .smp_callin_clear_local_apic    = NULL,
658         .inquire_remote_apic            = default_inquire_remote_apic,
659
660         .read                           = native_apic_mem_read,
661         .write                          = native_apic_mem_write,
662         .eoi_write                      = native_apic_mem_write,
663         .icr_read                       = native_apic_icr_read,
664         .icr_write                      = native_apic_icr_write,
665         .wait_icr_idle                  = native_apic_wait_icr_idle,
666         .safe_wait_icr_idle             = native_safe_apic_wait_icr_idle,
667
668         .x86_32_early_logical_apicid    = es7000_early_logical_apicid,
669 };
670
671 static struct apic __refdata apic_es7000 = {
672
673         .name                           = "es7000",
674         .probe                          = probe_es7000,
675         .acpi_madt_oem_check            = es7000_acpi_madt_oem_check,
676         .apic_id_valid                  = default_apic_id_valid,
677         .apic_id_registered             = es7000_apic_id_registered,
678
679         .irq_delivery_mode              = dest_Fixed,
680         /* phys delivery to target CPUs: */
681         .irq_dest_mode                  = 0,
682
683         .target_cpus                    = es7000_target_cpus,
684         .disable_esr                    = 1,
685         .dest_logical                   = 0,
686         .check_apicid_used              = es7000_check_apicid_used,
687         .check_apicid_present           = es7000_check_apicid_present,
688
689         .vector_allocation_domain       = flat_vector_allocation_domain,
690         .init_apic_ldr                  = es7000_init_apic_ldr,
691
692         .ioapic_phys_id_map             = es7000_ioapic_phys_id_map,
693         .setup_apic_routing             = es7000_setup_apic_routing,
694         .multi_timer_check              = NULL,
695         .cpu_present_to_apicid          = es7000_cpu_present_to_apicid,
696         .apicid_to_cpu_present          = es7000_apicid_to_cpu_present,
697         .setup_portio_remap             = NULL,
698         .check_phys_apicid_present      = es7000_check_phys_apicid_present,
699         .enable_apic_mode               = es7000_enable_apic_mode,
700         .phys_pkg_id                    = es7000_phys_pkg_id,
701         .mps_oem_check                  = es7000_mps_oem_check,
702
703         .get_apic_id                    = es7000_get_apic_id,
704         .set_apic_id                    = NULL,
705         .apic_id_mask                   = 0xFF << 24,
706
707         .cpu_mask_to_apicid_and         = es7000_cpu_mask_to_apicid_and,
708
709         .send_IPI_mask                  = es7000_send_IPI_mask,
710         .send_IPI_mask_allbutself       = NULL,
711         .send_IPI_allbutself            = es7000_send_IPI_allbutself,
712         .send_IPI_all                   = es7000_send_IPI_all,
713         .send_IPI_self                  = default_send_IPI_self,
714
715         .trampoline_phys_low            = 0x467,
716         .trampoline_phys_high           = 0x469,
717
718         .wait_for_init_deassert         = true,
719         /* Nothing to do for most platforms, since cleared by the INIT cycle: */
720         .smp_callin_clear_local_apic    = NULL,
721         .inquire_remote_apic            = default_inquire_remote_apic,
722
723         .read                           = native_apic_mem_read,
724         .write                          = native_apic_mem_write,
725         .eoi_write                      = native_apic_mem_write,
726         .icr_read                       = native_apic_icr_read,
727         .icr_write                      = native_apic_icr_write,
728         .wait_icr_idle                  = native_apic_wait_icr_idle,
729         .safe_wait_icr_idle             = native_safe_apic_wait_icr_idle,
730
731         .x86_32_early_logical_apicid    = es7000_early_logical_apicid,
732 };
733
734 /*
735  * Need to check for es7000 followed by es7000_cluster, so this order
736  * in apic_drivers is important.
737  */
738 apic_drivers(apic_es7000, apic_es7000_cluster);