x86/apic: Make cpu_mask_to_apicid() operations check cpu_online_mask
[linux-2.6.git] / arch / x86 / kernel / apic / es7000_32.c
blobb35cfb9b69629710f8c43ef4bb76c74a7fa63394
1 /*
2 * Written by: Garry Forsgren, Unisys Corporation
3 * Natalie Protasevich, Unisys Corporation
5 * This file contains the code to configure and interface
6 * with Unisys ES7000 series hardware system manager.
8 * Copyright (c) 2003 Unisys Corporation.
9 * Copyright (C) 2009, Red Hat, Inc., Ingo Molnar
11 * All Rights Reserved.
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.
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.
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.
25 * Contact information: Unisys Corporation, Township Line & Union Meeting
26 * Roads-A, Unisys Way, Blue Bell, Pennsylvania, 19424, or:
28 * http://www.unisys.com
31 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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>
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>
59 * ES7000 chipsets
62 #define NON_UNISYS 0
63 #define ES7000_CLASSIC 1
64 #define ES7000_ZORRO 2
66 #define MIP_REG 1
67 #define MIP_PSAI_REG 4
69 #define MIP_BUSY 1
70 #define MIP_SPIN 0xf0000
71 #define MIP_VALID 0x0100000000000000ULL
72 #define MIP_SW_APIC 0x1020b
74 #define MIP_PORT(val) ((val >> 32) & 0xffff)
76 #define MIP_RD_LO(val) (val & 0xffffffff)
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;
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;
96 struct psai {
97 unsigned long long entry_type;
98 unsigned long long addr;
99 unsigned long long bep_addr;
102 #ifdef CONFIG_ACPI
104 struct es7000_oem_table {
105 struct acpi_table_header Header;
106 u32 OEMTableAddr;
107 u32 OEMTableSize;
110 static unsigned long oem_addrX;
111 static unsigned long oem_size;
113 #endif
116 * ES7000 Globals
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;
126 int es7000_plat;
129 * GSI override for ES7000 platforms.
133 static int __cpuinit wakeup_secondary_cpu_via_mip(int cpu, unsigned long eip)
135 unsigned long vect = 0, psaival = 0;
137 if (psai == NULL)
138 return -1;
140 vect = ((unsigned long)__pa(eip)/0x1000) << 16;
141 psaival = (0x1000000 | vect | cpu);
143 while (*psai & 0x1000000)
146 *psai = psaival;
148 return 0;
151 static int es7000_apic_is_cluster(void)
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;
158 return 0;
161 static void setup_unisys(void)
164 * Determine the generation of the ES7000 currently running.
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
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;
177 * Parse the OEM Table:
179 static int parse_unisys_oem(char *oemptr)
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;
190 tp = oemptr;
192 tp += 8;
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++;
225 break;
226 default:
227 break;
229 tp += size;
232 if (success < 2)
233 es7000_plat = NON_UNISYS;
234 else
235 setup_unisys();
237 return es7000_plat;
240 #ifdef CONFIG_ACPI
241 static int __init find_unisys_acpi_oem_table(unsigned long *oem_addr)
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;
249 for (;;) {
250 ret = acpi_get_table_with_size("OEM1", i++, &header, &tbl_size);
251 if (!ACPI_SUCCESS(ret))
252 return -1;
254 if (!memcmp((char *) &header->oem_id, "UNISYS", 6))
255 break;
257 early_acpi_os_unmap_memory(header, tbl_size);
260 table = (void *)header;
262 oem_addrX = table->OEMTableAddr;
263 oem_size = table->OEMTableSize;
265 early_acpi_os_unmap_memory(header, tbl_size);
267 *oem_addr = (unsigned long)__acpi_map_table(oem_addrX, oem_size);
269 return 0;
272 static void __init unmap_unisys_acpi_oem_table(unsigned long oem_addr)
274 if (!oem_addr)
275 return;
277 __acpi_unmap_table((char *)oem_addr, oem_size);
280 static int es7000_check_dsdt(void)
282 struct acpi_table_header header;
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;
290 static int es7000_acpi_ret;
292 /* Hook from generic ACPI tables.c */
293 static int __init es7000_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
295 unsigned long oem_addr = 0;
296 int check_dsdt;
297 int ret = 0;
299 /* check dsdt at first to avoid clear fix_map for oem_addr */
300 check_dsdt = es7000_check_dsdt();
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;
310 * we need to unmap it
312 unmap_unisys_acpi_oem_table(oem_addr);
315 es7000_acpi_ret = ret;
317 return ret && !es7000_apic_is_cluster();
320 static int es7000_acpi_madt_oem_check_cluster(char *oem_id, char *oem_table_id)
322 int ret = es7000_acpi_ret;
324 return ret && es7000_apic_is_cluster();
327 #else /* !CONFIG_ACPI: */
328 static int es7000_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
330 return 0;
333 static int es7000_acpi_madt_oem_check_cluster(char *oem_id, char *oem_table_id)
335 return 0;
337 #endif /* !CONFIG_ACPI */
339 static void es7000_spin(int n)
341 int i = 0;
343 while (i++ < n)
344 rep_nop();
347 static int es7000_mip_write(struct mip_reg *mip_reg)
349 int status = 0;
350 int spin;
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;
358 es7000_spin(MIP_SPIN);
361 memcpy(host_reg, mip_reg, sizeof(struct mip_reg));
362 outb(1, mip_port);
364 spin = MIP_SPIN;
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;
371 es7000_spin(MIP_SPIN);
374 status = (mip_reg->off_0x00 & 0xffff0000000000ULL) >> 48;
375 mip_reg->off_0x38 &= ~MIP_VALID;
377 return status;
380 static void es7000_enable_apic_mode(void)
382 struct mip_reg es7000_mip_reg;
383 int mip_status;
385 if (!es7000_plat)
386 return;
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;
393 while ((mip_status = es7000_mip_write(&es7000_mip_reg)) != 0)
394 WARN(1, "Command failed, status = %x\n", mip_status);
397 static void es7000_wait_for_init_deassert(atomic_t *deassert)
399 while (!atomic_read(deassert))
400 cpu_relax();
403 static unsigned int es7000_get_apic_id(unsigned long x)
405 return (x >> 24) & 0xFF;
408 static void es7000_send_IPI_mask(const struct cpumask *mask, int vector)
410 default_send_IPI_mask_sequence_phys(mask, vector);
413 static void es7000_send_IPI_allbutself(int vector)
415 default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
418 static void es7000_send_IPI_all(int vector)
420 es7000_send_IPI_mask(cpu_online_mask, vector);
423 static int es7000_apic_id_registered(void)
425 return 1;
428 static const struct cpumask *target_cpus_cluster(void)
430 return cpu_all_mask;
433 static const struct cpumask *es7000_target_cpus(void)
435 return cpumask_of(smp_processor_id());
438 static unsigned long es7000_check_apicid_used(physid_mask_t *map, int apicid)
440 return 0;
443 static unsigned long es7000_check_apicid_present(int bit)
445 return physid_isset(bit, phys_cpu_present_map);
448 static int es7000_early_logical_apicid(int cpu)
450 /* on es7000, logical apicid is the same as physical */
451 return early_per_cpu(x86_bios_cpu_apicid, cpu);
454 static unsigned long calculate_ldr(int cpu)
456 unsigned long id = per_cpu(x86_bios_cpu_apicid, cpu);
458 return SET_APIC_LOGICAL_ID(id);
462 * Set up the logical destination ID.
464 * Intel recommends to set DFR, LdR and TPR before enabling
465 * an APIC. See e.g. "AP-388 82489DX User's Manual" (Intel
466 * document number 292116). So here it goes...
468 static void es7000_init_apic_ldr_cluster(void)
470 unsigned long val;
471 int cpu = smp_processor_id();
473 apic_write(APIC_DFR, APIC_DFR_CLUSTER);
474 val = calculate_ldr(cpu);
475 apic_write(APIC_LDR, val);
478 static void es7000_init_apic_ldr(void)
480 unsigned long val;
481 int cpu = smp_processor_id();
483 apic_write(APIC_DFR, APIC_DFR_FLAT);
484 val = calculate_ldr(cpu);
485 apic_write(APIC_LDR, val);
488 static void es7000_setup_apic_routing(void)
490 int apic = per_cpu(x86_bios_cpu_apicid, smp_processor_id());
492 pr_info("Enabling APIC mode: %s. Using %d I/O APICs, target cpus %lx\n",
493 (apic_version[apic] == 0x14) ?
494 "Physical Cluster" : "Logical Cluster",
495 nr_ioapics, cpumask_bits(es7000_target_cpus())[0]);
498 static int es7000_cpu_present_to_apicid(int mps_cpu)
500 if (!mps_cpu)
501 return boot_cpu_physical_apicid;
502 else if (mps_cpu < nr_cpu_ids)
503 return per_cpu(x86_bios_cpu_apicid, mps_cpu);
504 else
505 return BAD_APICID;
508 static int cpu_id;
510 static void es7000_apicid_to_cpu_present(int phys_apicid, physid_mask_t *retmap)
512 physid_set_mask_of_physid(cpu_id, retmap);
513 ++cpu_id;
516 static void es7000_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
518 /* For clustered we don't have a good way to do this yet - hack */
519 physids_promote(0xFFL, retmap);
522 static int es7000_check_phys_apicid_present(int cpu_physical_apicid)
524 boot_cpu_physical_apicid = read_apic_id();
525 return 1;
528 static int
529 es7000_cpu_mask_to_apicid(const struct cpumask *cpumask, unsigned int *dest_id)
531 unsigned int round = 0;
532 int cpu, uninitialized_var(apicid);
535 * The cpus in the mask must all be on the apic cluster.
537 for_each_cpu_and(cpu, cpumask, cpu_online_mask) {
538 int new_apicid = early_per_cpu(x86_cpu_to_logical_apicid, cpu);
540 if (round && APIC_CLUSTER(apicid) != APIC_CLUSTER(new_apicid)) {
541 WARN(1, "Not a valid mask!");
543 return -EINVAL;
545 apicid = new_apicid;
546 round++;
548 *dest_id = apicid;
549 return 0;
552 static int
553 es7000_cpu_mask_to_apicid_and(const struct cpumask *inmask,
554 const struct cpumask *andmask,
555 unsigned int *apicid)
557 *apicid = early_per_cpu(x86_cpu_to_logical_apicid, 0);
558 cpumask_var_t cpumask;
560 if (!alloc_cpumask_var(&cpumask, GFP_ATOMIC))
561 return 0;
563 cpumask_and(cpumask, inmask, andmask);
564 es7000_cpu_mask_to_apicid(cpumask, apicid);
566 free_cpumask_var(cpumask);
568 return 0;
571 static int es7000_phys_pkg_id(int cpuid_apic, int index_msb)
573 return cpuid_apic >> index_msb;
576 static int probe_es7000(void)
578 /* probed later in mptable/ACPI hooks */
579 return 0;
582 static int es7000_mps_ret;
583 static int es7000_mps_oem_check(struct mpc_table *mpc, char *oem,
584 char *productid)
586 int ret = 0;
588 if (mpc->oemptr) {
589 struct mpc_oemtable *oem_table =
590 (struct mpc_oemtable *)mpc->oemptr;
592 if (!strncmp(oem, "UNISYS", 6))
593 ret = parse_unisys_oem((char *)oem_table);
596 es7000_mps_ret = ret;
598 return ret && !es7000_apic_is_cluster();
601 static int es7000_mps_oem_check_cluster(struct mpc_table *mpc, char *oem,
602 char *productid)
604 int ret = es7000_mps_ret;
606 return ret && es7000_apic_is_cluster();
609 /* We've been warned by a false positive warning.Use __refdata to keep calm. */
610 static struct apic __refdata apic_es7000_cluster = {
612 .name = "es7000",
613 .probe = probe_es7000,
614 .acpi_madt_oem_check = es7000_acpi_madt_oem_check_cluster,
615 .apic_id_valid = default_apic_id_valid,
616 .apic_id_registered = es7000_apic_id_registered,
618 .irq_delivery_mode = dest_LowestPrio,
619 /* logical delivery broadcast to all procs: */
620 .irq_dest_mode = 1,
622 .target_cpus = target_cpus_cluster,
623 .disable_esr = 1,
624 .dest_logical = 0,
625 .check_apicid_used = es7000_check_apicid_used,
626 .check_apicid_present = es7000_check_apicid_present,
628 .vector_allocation_domain = flat_vector_allocation_domain,
629 .init_apic_ldr = es7000_init_apic_ldr_cluster,
631 .ioapic_phys_id_map = es7000_ioapic_phys_id_map,
632 .setup_apic_routing = es7000_setup_apic_routing,
633 .multi_timer_check = NULL,
634 .cpu_present_to_apicid = es7000_cpu_present_to_apicid,
635 .apicid_to_cpu_present = es7000_apicid_to_cpu_present,
636 .setup_portio_remap = NULL,
637 .check_phys_apicid_present = es7000_check_phys_apicid_present,
638 .enable_apic_mode = es7000_enable_apic_mode,
639 .phys_pkg_id = es7000_phys_pkg_id,
640 .mps_oem_check = es7000_mps_oem_check_cluster,
642 .get_apic_id = es7000_get_apic_id,
643 .set_apic_id = NULL,
644 .apic_id_mask = 0xFF << 24,
646 .cpu_mask_to_apicid = es7000_cpu_mask_to_apicid,
647 .cpu_mask_to_apicid_and = es7000_cpu_mask_to_apicid_and,
649 .send_IPI_mask = es7000_send_IPI_mask,
650 .send_IPI_mask_allbutself = NULL,
651 .send_IPI_allbutself = es7000_send_IPI_allbutself,
652 .send_IPI_all = es7000_send_IPI_all,
653 .send_IPI_self = default_send_IPI_self,
655 .wakeup_secondary_cpu = wakeup_secondary_cpu_via_mip,
657 .trampoline_phys_low = 0x467,
658 .trampoline_phys_high = 0x469,
660 .wait_for_init_deassert = NULL,
662 /* Nothing to do for most platforms, since cleared by the INIT cycle: */
663 .smp_callin_clear_local_apic = NULL,
664 .inquire_remote_apic = default_inquire_remote_apic,
666 .read = native_apic_mem_read,
667 .write = native_apic_mem_write,
668 .eoi_write = native_apic_mem_write,
669 .icr_read = native_apic_icr_read,
670 .icr_write = native_apic_icr_write,
671 .wait_icr_idle = native_apic_wait_icr_idle,
672 .safe_wait_icr_idle = native_safe_apic_wait_icr_idle,
674 .x86_32_early_logical_apicid = es7000_early_logical_apicid,
677 static struct apic __refdata apic_es7000 = {
679 .name = "es7000",
680 .probe = probe_es7000,
681 .acpi_madt_oem_check = es7000_acpi_madt_oem_check,
682 .apic_id_valid = default_apic_id_valid,
683 .apic_id_registered = es7000_apic_id_registered,
685 .irq_delivery_mode = dest_Fixed,
686 /* phys delivery to target CPUs: */
687 .irq_dest_mode = 0,
689 .target_cpus = es7000_target_cpus,
690 .disable_esr = 1,
691 .dest_logical = 0,
692 .check_apicid_used = es7000_check_apicid_used,
693 .check_apicid_present = es7000_check_apicid_present,
695 .vector_allocation_domain = flat_vector_allocation_domain,
696 .init_apic_ldr = es7000_init_apic_ldr,
698 .ioapic_phys_id_map = es7000_ioapic_phys_id_map,
699 .setup_apic_routing = es7000_setup_apic_routing,
700 .multi_timer_check = NULL,
701 .cpu_present_to_apicid = es7000_cpu_present_to_apicid,
702 .apicid_to_cpu_present = es7000_apicid_to_cpu_present,
703 .setup_portio_remap = NULL,
704 .check_phys_apicid_present = es7000_check_phys_apicid_present,
705 .enable_apic_mode = es7000_enable_apic_mode,
706 .phys_pkg_id = es7000_phys_pkg_id,
707 .mps_oem_check = es7000_mps_oem_check,
709 .get_apic_id = es7000_get_apic_id,
710 .set_apic_id = NULL,
711 .apic_id_mask = 0xFF << 24,
713 .cpu_mask_to_apicid = es7000_cpu_mask_to_apicid,
714 .cpu_mask_to_apicid_and = es7000_cpu_mask_to_apicid_and,
716 .send_IPI_mask = es7000_send_IPI_mask,
717 .send_IPI_mask_allbutself = NULL,
718 .send_IPI_allbutself = es7000_send_IPI_allbutself,
719 .send_IPI_all = es7000_send_IPI_all,
720 .send_IPI_self = default_send_IPI_self,
722 .trampoline_phys_low = 0x467,
723 .trampoline_phys_high = 0x469,
725 .wait_for_init_deassert = es7000_wait_for_init_deassert,
727 /* Nothing to do for most platforms, since cleared by the INIT cycle: */
728 .smp_callin_clear_local_apic = NULL,
729 .inquire_remote_apic = default_inquire_remote_apic,
731 .read = native_apic_mem_read,
732 .write = native_apic_mem_write,
733 .eoi_write = native_apic_mem_write,
734 .icr_read = native_apic_icr_read,
735 .icr_write = native_apic_icr_write,
736 .wait_icr_idle = native_apic_wait_icr_idle,
737 .safe_wait_icr_idle = native_safe_apic_wait_icr_idle,
739 .x86_32_early_logical_apicid = es7000_early_logical_apicid,
743 * Need to check for es7000 followed by es7000_cluster, so this order
744 * in apic_drivers is important.
746 apic_drivers(apic_es7000, apic_es7000_cluster);