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
30 #include <linux/notifier.h>
31 #include <linux/spinlock.h>
32 #include <linux/cpumask.h>
33 #include <linux/threads.h>
34 #include <linux/kernel.h>
35 #include <linux/module.h>
36 #include <linux/reboot.h>
37 #include <linux/string.h>
38 #include <linux/types.h>
39 #include <linux/errno.h>
40 #include <linux/acpi.h>
41 #include <linux/init.h>
42 #include <linux/nmi.h>
43 #include <linux/smp.h>
46 #include <asm/apicdef.h>
47 #include <asm/atomic.h>
48 #include <asm/fixmap.h>
49 #include <asm/mpspec.h>
50 #include <asm/setup.h>
59 #define ES7000_CLASSIC 1
60 #define ES7000_ZORRO 2
63 #define MIP_PSAI_REG 4
66 #define MIP_SPIN 0xf0000
67 #define MIP_VALID 0x0100000000000000ULL
68 #define MIP_SW_APIC 0x1020b
70 #define MIP_PORT(val) ((val >> 32) & 0xffff)
72 #define MIP_RD_LO(val) (val & 0xffffffff)
75 unsigned long long off_0x00;
76 unsigned long long off_0x08;
77 unsigned long long off_0x10;
78 unsigned long long off_0x18;
79 unsigned long long off_0x20;
80 unsigned long long off_0x28;
81 unsigned long long off_0x30;
82 unsigned long long off_0x38;
86 unsigned long long mip_info;
87 unsigned long long delivery_info;
88 unsigned long long host_reg;
89 unsigned long long mip_reg;
93 unsigned long long entry_type;
94 unsigned long long addr;
95 unsigned long long bep_addr;
100 struct es7000_oem_table {
101 struct acpi_table_header Header;
106 static unsigned long oem_addrX;
107 static unsigned long oem_size;
115 static volatile unsigned long *psai;
116 static struct mip_reg *mip_reg;
117 static struct mip_reg *host_reg;
119 static unsigned long mip_addr;
120 static unsigned long host_addr;
125 * GSI override for ES7000 platforms.
128 static unsigned int base;
131 es7000_rename_gsi(int ioapic, int gsi)
133 if (es7000_plat == ES7000_ZORRO)
138 for (i = 0; i < nr_ioapics; i++)
139 base += nr_ioapic_registers[i];
142 if (!ioapic && (gsi < 16))
148 static int wakeup_secondary_cpu_via_mip(int cpu, unsigned long eip)
150 unsigned long vect = 0, psaival = 0;
155 vect = ((unsigned long)__pa(eip)/0x1000) << 16;
156 psaival = (0x1000000 | vect | cpu);
158 while (*psai & 0x1000000)
166 static int __init es7000_update_apic(void)
168 apic->wakeup_cpu = wakeup_secondary_cpu_via_mip;
171 if (boot_cpu_data.x86 == 6 &&
172 (boot_cpu_data.x86_model >= 7 || boot_cpu_data.x86_model <= 11)) {
173 es7000_update_apic_to_cluster();
174 apic->wait_for_init_deassert = NULL;
175 apic->wakeup_cpu = wakeup_secondary_cpu_via_mip;
181 static void __init setup_unisys(void)
184 * Determine the generation of the ES7000 currently running.
186 * es7000_plat = 1 if the machine is a 5xx ES7000 box
187 * es7000_plat = 2 if the machine is a x86_64 ES7000 box
190 if (!(boot_cpu_data.x86 <= 15 && boot_cpu_data.x86_model <= 2))
191 es7000_plat = ES7000_ZORRO;
193 es7000_plat = ES7000_CLASSIC;
194 ioapic_renumber_irq = es7000_rename_gsi;
196 x86_quirks->update_apic = es7000_update_apic;
200 * Parse the OEM Table:
202 static int __init parse_unisys_oem(char *oemptr)
206 unsigned char type, size;
209 struct psai *psaip = NULL;
210 struct mip_reg_info *mi;
211 struct mip_reg *host, *mip;
217 for (i = 0; i <= 6; i++) {
223 mi = (struct mip_reg_info *)tp;
224 val = MIP_RD_LO(mi->host_reg);
226 host = (struct mip_reg *)val;
227 host_reg = __va(host);
228 val = MIP_RD_LO(mi->mip_reg);
229 mip_port = MIP_PORT(mi->mip_info);
231 mip = (struct mip_reg *)val;
233 pr_debug("es7000_mipcfg: host_reg = 0x%lx \n",
234 (unsigned long)host_reg);
235 pr_debug("es7000_mipcfg: mip_reg = 0x%lx \n",
236 (unsigned long)mip_reg);
240 psaip = (struct psai *)tp;
243 psai = __va(psaip->addr);
256 es7000_plat = NON_UNISYS;
264 static int __init find_unisys_acpi_oem_table(unsigned long *oem_addr)
266 struct acpi_table_header *header = NULL;
267 struct es7000_oem_table *table;
273 ret = acpi_get_table_with_size("OEM1", i++, &header, &tbl_size);
274 if (!ACPI_SUCCESS(ret))
277 if (!memcmp((char *) &header->oem_id, "UNISYS", 6))
280 early_acpi_os_unmap_memory(header, tbl_size);
283 table = (void *)header;
285 oem_addrX = table->OEMTableAddr;
286 oem_size = table->OEMTableSize;
288 early_acpi_os_unmap_memory(header, tbl_size);
290 *oem_addr = (unsigned long)__acpi_map_table(oem_addrX, oem_size);
295 static void __init unmap_unisys_acpi_oem_table(unsigned long oem_addr)
300 __acpi_unmap_table((char *)oem_addr, oem_size);
303 static int es7000_check_dsdt(void)
305 struct acpi_table_header header;
307 if (ACPI_SUCCESS(acpi_get_table_header(ACPI_SIG_DSDT, 0, &header)) &&
308 !strncmp(header.oem_id, "UNISYS", 6))
313 /* Hook from generic ACPI tables.c */
314 static int __init es7000_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
316 unsigned long oem_addr = 0;
320 /* check dsdt at first to avoid clear fix_map for oem_addr */
321 check_dsdt = es7000_check_dsdt();
323 if (!find_unisys_acpi_oem_table(&oem_addr)) {
325 ret = parse_unisys_oem((char *)oem_addr);
331 * we need to unmap it
333 unmap_unisys_acpi_oem_table(oem_addr);
337 #else /* !CONFIG_ACPI: */
338 static int __init es7000_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
342 #endif /* !CONFIG_ACPI */
344 static void es7000_spin(int n)
353 es7000_mip_write(struct mip_reg *mip_reg)
359 while ((host_reg->off_0x38 & MIP_VALID) != 0) {
361 WARN(1, "Timeout waiting for Host Valid Flag\n");
364 es7000_spin(MIP_SPIN);
367 memcpy(host_reg, mip_reg, sizeof(struct mip_reg));
372 while ((mip_reg->off_0x38 & MIP_VALID) == 0) {
374 WARN(1, "Timeout waiting for MIP Valid Flag\n");
377 es7000_spin(MIP_SPIN);
380 status = (mip_reg->off_0x00 & 0xffff0000000000ULL) >> 48;
381 mip_reg->off_0x38 &= ~MIP_VALID;
386 static void __init es7000_enable_apic_mode(void)
388 struct mip_reg es7000_mip_reg;
394 printk(KERN_INFO "ES7000: Enabling APIC mode.\n");
395 memset(&es7000_mip_reg, 0, sizeof(struct mip_reg));
396 es7000_mip_reg.off_0x00 = MIP_SW_APIC;
397 es7000_mip_reg.off_0x38 = MIP_VALID;
399 while ((mip_status = es7000_mip_write(&es7000_mip_reg)) != 0)
400 WARN(1, "Command failed, status = %x\n", mip_status);
403 static void es7000_vector_allocation_domain(int cpu, cpumask_t *retmask)
405 /* Careful. Some cpus do not strictly honor the set of cpus
406 * specified in the interrupt destination when using lowest
407 * priority interrupt delivery mode.
409 * In particular there was a hyperthreading cpu observed to
410 * deliver interrupts to the wrong hyperthread when only one
411 * hyperthread was specified in the interrupt desitination.
413 *retmask = (cpumask_t){ { [0] = APIC_ALL_CPUS, } };
417 static void es7000_wait_for_init_deassert(atomic_t *deassert)
419 #ifndef CONFIG_ES7000_CLUSTERED_APIC
420 while (!atomic_read(deassert))
426 static unsigned int es7000_get_apic_id(unsigned long x)
428 return (x >> 24) & 0xFF;
431 static void es7000_send_IPI_mask(const struct cpumask *mask, int vector)
433 default_send_IPI_mask_sequence_phys(mask, vector);
436 static void es7000_send_IPI_allbutself(int vector)
438 default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
441 static void es7000_send_IPI_all(int vector)
443 es7000_send_IPI_mask(cpu_online_mask, vector);
446 static int es7000_apic_id_registered(void)
451 static const cpumask_t *target_cpus_cluster(void)
453 return &CPU_MASK_ALL;
456 static const cpumask_t *es7000_target_cpus(void)
458 return &cpumask_of_cpu(smp_processor_id());
462 es7000_check_apicid_used(physid_mask_t bitmap, int apicid)
466 static unsigned long es7000_check_apicid_present(int bit)
468 return physid_isset(bit, phys_cpu_present_map);
471 static unsigned long calculate_ldr(int cpu)
473 unsigned long id = per_cpu(x86_bios_cpu_apicid, cpu);
475 return SET_APIC_LOGICAL_ID(id);
479 * Set up the logical destination ID.
481 * Intel recommends to set DFR, LdR and TPR before enabling
482 * an APIC. See e.g. "AP-388 82489DX User's Manual" (Intel
483 * document number 292116). So here it goes...
485 static void es7000_init_apic_ldr_cluster(void)
488 int cpu = smp_processor_id();
490 apic_write(APIC_DFR, APIC_DFR_CLUSTER);
491 val = calculate_ldr(cpu);
492 apic_write(APIC_LDR, val);
495 static void es7000_init_apic_ldr(void)
498 int cpu = smp_processor_id();
500 apic_write(APIC_DFR, APIC_DFR_FLAT);
501 val = calculate_ldr(cpu);
502 apic_write(APIC_LDR, val);
505 static void es7000_setup_apic_routing(void)
507 int apic = per_cpu(x86_bios_cpu_apicid, smp_processor_id());
510 "Enabling APIC mode: %s. Using %d I/O APICs, target cpus %lx\n",
511 (apic_version[apic] == 0x14) ?
512 "Physical Cluster" : "Logical Cluster",
513 nr_ioapics, cpus_addr(*es7000_target_cpus())[0]);
516 static int es7000_apicid_to_node(int logical_apicid)
522 static int es7000_cpu_present_to_apicid(int mps_cpu)
525 return boot_cpu_physical_apicid;
526 else if (mps_cpu < nr_cpu_ids)
527 return per_cpu(x86_bios_cpu_apicid, mps_cpu);
534 static physid_mask_t es7000_apicid_to_cpu_present(int phys_apicid)
538 mask = physid_mask_of_physid(cpu_id);
544 /* Mapping from cpu number to logical apicid */
545 static int es7000_cpu_to_logical_apicid(int cpu)
548 if (cpu >= nr_cpu_ids)
550 return cpu_2_logical_apicid[cpu];
552 return logical_smp_processor_id();
556 static physid_mask_t es7000_ioapic_phys_id_map(physid_mask_t phys_map)
558 /* For clustered we don't have a good way to do this yet - hack */
559 return physids_promote(0xff);
562 static int es7000_check_phys_apicid_present(int cpu_physical_apicid)
564 boot_cpu_physical_apicid = read_apic_id();
569 es7000_cpu_mask_to_apicid_cluster(const struct cpumask *cpumask)
576 num_bits_set = cpumask_weight(cpumask);
577 /* Return id to all */
578 if (num_bits_set == nr_cpu_ids)
581 * The cpus in the mask must all be on the apic cluster. If are not
582 * on the same apicid cluster return default value of target_cpus():
584 cpu = cpumask_first(cpumask);
585 apicid = es7000_cpu_to_logical_apicid(cpu);
587 while (cpus_found < num_bits_set) {
588 if (cpumask_test_cpu(cpu, cpumask)) {
589 int new_apicid = es7000_cpu_to_logical_apicid(cpu);
591 if (APIC_CLUSTER(apicid) != APIC_CLUSTER(new_apicid)) {
592 WARN(1, "Not a valid mask!");
604 static unsigned int es7000_cpu_mask_to_apicid(const cpumask_t *cpumask)
611 num_bits_set = cpus_weight(*cpumask);
612 /* Return id to all */
613 if (num_bits_set == nr_cpu_ids)
614 return es7000_cpu_to_logical_apicid(0);
616 * The cpus in the mask must all be on the apic cluster. If are not
617 * on the same apicid cluster return default value of target_cpus():
619 cpu = first_cpu(*cpumask);
620 apicid = es7000_cpu_to_logical_apicid(cpu);
621 while (cpus_found < num_bits_set) {
622 if (cpu_isset(cpu, *cpumask)) {
623 int new_apicid = es7000_cpu_to_logical_apicid(cpu);
625 if (APIC_CLUSTER(apicid) != APIC_CLUSTER(new_apicid)) {
626 printk("%s: Not a valid mask!\n", __func__);
628 return es7000_cpu_to_logical_apicid(0);
639 es7000_cpu_mask_to_apicid_and(const struct cpumask *inmask,
640 const struct cpumask *andmask)
642 int apicid = es7000_cpu_to_logical_apicid(0);
643 cpumask_var_t cpumask;
645 if (!alloc_cpumask_var(&cpumask, GFP_ATOMIC))
648 cpumask_and(cpumask, inmask, andmask);
649 cpumask_and(cpumask, cpumask, cpu_online_mask);
650 apicid = es7000_cpu_mask_to_apicid(cpumask);
652 free_cpumask_var(cpumask);
657 static int es7000_phys_pkg_id(int cpuid_apic, int index_msb)
659 return cpuid_apic >> index_msb;
662 void __init es7000_update_apic_to_cluster(void)
664 apic->target_cpus = target_cpus_cluster;
665 apic->irq_delivery_mode = dest_LowestPrio;
666 /* logical delivery broadcast to all procs: */
667 apic->irq_dest_mode = 1;
669 apic->init_apic_ldr = es7000_init_apic_ldr_cluster;
671 apic->cpu_mask_to_apicid = es7000_cpu_mask_to_apicid_cluster;
674 static int probe_es7000(void)
676 /* probed later in mptable/ACPI hooks */
681 es7000_mps_oem_check(struct mpc_table *mpc, char *oem, char *productid)
684 struct mpc_oemtable *oem_table =
685 (struct mpc_oemtable *)mpc->oemptr;
687 if (!strncmp(oem, "UNISYS", 6))
688 return parse_unisys_oem((char *)oem_table);
694 struct apic apic_es7000 = {
697 .probe = probe_es7000,
698 .acpi_madt_oem_check = es7000_acpi_madt_oem_check,
699 .apic_id_registered = es7000_apic_id_registered,
701 .irq_delivery_mode = dest_Fixed,
702 /* phys delivery to target CPUs: */
705 .target_cpus = es7000_target_cpus,
708 .check_apicid_used = es7000_check_apicid_used,
709 .check_apicid_present = es7000_check_apicid_present,
711 .vector_allocation_domain = es7000_vector_allocation_domain,
712 .init_apic_ldr = es7000_init_apic_ldr,
714 .ioapic_phys_id_map = es7000_ioapic_phys_id_map,
715 .setup_apic_routing = es7000_setup_apic_routing,
716 .multi_timer_check = NULL,
717 .apicid_to_node = es7000_apicid_to_node,
718 .cpu_to_logical_apicid = es7000_cpu_to_logical_apicid,
719 .cpu_present_to_apicid = es7000_cpu_present_to_apicid,
720 .apicid_to_cpu_present = es7000_apicid_to_cpu_present,
721 .setup_portio_remap = NULL,
722 .check_phys_apicid_present = es7000_check_phys_apicid_present,
723 .enable_apic_mode = es7000_enable_apic_mode,
724 .phys_pkg_id = es7000_phys_pkg_id,
725 .mps_oem_check = es7000_mps_oem_check,
727 .get_apic_id = es7000_get_apic_id,
729 .apic_id_mask = 0xFF << 24,
731 .cpu_mask_to_apicid = es7000_cpu_mask_to_apicid,
732 .cpu_mask_to_apicid_and = es7000_cpu_mask_to_apicid_and,
734 .send_IPI_mask = es7000_send_IPI_mask,
735 .send_IPI_mask_allbutself = NULL,
736 .send_IPI_allbutself = es7000_send_IPI_allbutself,
737 .send_IPI_all = es7000_send_IPI_all,
738 .send_IPI_self = default_send_IPI_self,
742 .trampoline_phys_low = 0x467,
743 .trampoline_phys_high = 0x469,
745 .wait_for_init_deassert = es7000_wait_for_init_deassert,
747 /* Nothing to do for most platforms, since cleared by the INIT cycle: */
748 .smp_callin_clear_local_apic = NULL,
749 .inquire_remote_apic = default_inquire_remote_apic,
751 .read = native_apic_mem_read,
752 .write = native_apic_mem_write,
753 .icr_read = native_apic_icr_read,
754 .icr_write = native_apic_icr_write,
755 .wait_icr_idle = native_apic_wait_icr_idle,
756 .safe_wait_icr_idle = native_safe_apic_wait_icr_idle,