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 es7000_apic_is_cluster(void)
169 if (boot_cpu_data.x86 == 6 &&
170 (boot_cpu_data.x86_model >= 7 || boot_cpu_data.x86_model <= 11))
176 static void setup_unisys(void)
179 * Determine the generation of the ES7000 currently running.
181 * es7000_plat = 1 if the machine is a 5xx ES7000 box
182 * es7000_plat = 2 if the machine is a x86_64 ES7000 box
185 if (!(boot_cpu_data.x86 <= 15 && boot_cpu_data.x86_model <= 2))
186 es7000_plat = ES7000_ZORRO;
188 es7000_plat = ES7000_CLASSIC;
189 ioapic_renumber_irq = es7000_rename_gsi;
193 * Parse the OEM Table:
195 static int parse_unisys_oem(char *oemptr)
199 unsigned char type, size;
202 struct psai *psaip = NULL;
203 struct mip_reg_info *mi;
204 struct mip_reg *host, *mip;
210 for (i = 0; i <= 6; i++) {
216 mi = (struct mip_reg_info *)tp;
217 val = MIP_RD_LO(mi->host_reg);
219 host = (struct mip_reg *)val;
220 host_reg = __va(host);
221 val = MIP_RD_LO(mi->mip_reg);
222 mip_port = MIP_PORT(mi->mip_info);
224 mip = (struct mip_reg *)val;
226 pr_debug("es7000_mipcfg: host_reg = 0x%lx \n",
227 (unsigned long)host_reg);
228 pr_debug("es7000_mipcfg: mip_reg = 0x%lx \n",
229 (unsigned long)mip_reg);
233 psaip = (struct psai *)tp;
236 psai = __va(psaip->addr);
249 es7000_plat = NON_UNISYS;
257 static int find_unisys_acpi_oem_table(unsigned long *oem_addr)
259 struct acpi_table_header *header = NULL;
260 struct es7000_oem_table *table;
266 ret = acpi_get_table_with_size("OEM1", i++, &header, &tbl_size);
267 if (!ACPI_SUCCESS(ret))
270 if (!memcmp((char *) &header->oem_id, "UNISYS", 6))
273 early_acpi_os_unmap_memory(header, tbl_size);
276 table = (void *)header;
278 oem_addrX = table->OEMTableAddr;
279 oem_size = table->OEMTableSize;
281 early_acpi_os_unmap_memory(header, tbl_size);
283 *oem_addr = (unsigned long)__acpi_map_table(oem_addrX, oem_size);
288 static void unmap_unisys_acpi_oem_table(unsigned long oem_addr)
293 __acpi_unmap_table((char *)oem_addr, oem_size);
296 static int es7000_check_dsdt(void)
298 struct acpi_table_header header;
300 if (ACPI_SUCCESS(acpi_get_table_header(ACPI_SIG_DSDT, 0, &header)) &&
301 !strncmp(header.oem_id, "UNISYS", 6))
306 static int es7000_acpi_ret;
308 /* Hook from generic ACPI tables.c */
309 static int es7000_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
311 unsigned long oem_addr = 0;
315 /* check dsdt at first to avoid clear fix_map for oem_addr */
316 check_dsdt = es7000_check_dsdt();
318 if (!find_unisys_acpi_oem_table(&oem_addr)) {
320 ret = parse_unisys_oem((char *)oem_addr);
326 * we need to unmap it
328 unmap_unisys_acpi_oem_table(oem_addr);
331 es7000_acpi_ret = ret;
333 return ret && !es7000_apic_is_cluster();
336 static int es7000_acpi_madt_oem_check_cluster(char *oem_id, char *oem_table_id)
338 int ret = es7000_acpi_ret;
340 return ret && es7000_apic_is_cluster();
343 #else /* !CONFIG_ACPI: */
344 static int es7000_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
349 static int es7000_acpi_madt_oem_check_cluster(char *oem_id, char *oem_table_id)
353 #endif /* !CONFIG_ACPI */
355 static void es7000_spin(int n)
363 static int es7000_mip_write(struct mip_reg *mip_reg)
369 while ((host_reg->off_0x38 & MIP_VALID) != 0) {
371 WARN(1, "Timeout waiting for Host Valid Flag\n");
374 es7000_spin(MIP_SPIN);
377 memcpy(host_reg, mip_reg, sizeof(struct mip_reg));
382 while ((mip_reg->off_0x38 & MIP_VALID) == 0) {
384 WARN(1, "Timeout waiting for MIP Valid Flag\n");
387 es7000_spin(MIP_SPIN);
390 status = (mip_reg->off_0x00 & 0xffff0000000000ULL) >> 48;
391 mip_reg->off_0x38 &= ~MIP_VALID;
396 static void es7000_enable_apic_mode(void)
398 struct mip_reg es7000_mip_reg;
404 printk(KERN_INFO "ES7000: Enabling APIC mode.\n");
405 memset(&es7000_mip_reg, 0, sizeof(struct mip_reg));
406 es7000_mip_reg.off_0x00 = MIP_SW_APIC;
407 es7000_mip_reg.off_0x38 = MIP_VALID;
409 while ((mip_status = es7000_mip_write(&es7000_mip_reg)) != 0)
410 WARN(1, "Command failed, status = %x\n", mip_status);
413 static void es7000_vector_allocation_domain(int cpu, struct cpumask *retmask)
415 /* Careful. Some cpus do not strictly honor the set of cpus
416 * specified in the interrupt destination when using lowest
417 * priority interrupt delivery mode.
419 * In particular there was a hyperthreading cpu observed to
420 * deliver interrupts to the wrong hyperthread when only one
421 * hyperthread was specified in the interrupt desitination.
423 cpumask_clear(retmask);
424 cpumask_bits(retmask)[0] = APIC_ALL_CPUS;
428 static void es7000_wait_for_init_deassert(atomic_t *deassert)
430 while (!atomic_read(deassert))
434 static unsigned int es7000_get_apic_id(unsigned long x)
436 return (x >> 24) & 0xFF;
439 static void es7000_send_IPI_mask(const struct cpumask *mask, int vector)
441 default_send_IPI_mask_sequence_phys(mask, vector);
444 static void es7000_send_IPI_allbutself(int vector)
446 default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
449 static void es7000_send_IPI_all(int vector)
451 es7000_send_IPI_mask(cpu_online_mask, vector);
454 static int es7000_apic_id_registered(void)
459 static const struct cpumask *target_cpus_cluster(void)
464 static const struct cpumask *es7000_target_cpus(void)
466 return cpumask_of(smp_processor_id());
470 es7000_check_apicid_used(physid_mask_t bitmap, int apicid)
474 static unsigned long es7000_check_apicid_present(int bit)
476 return physid_isset(bit, phys_cpu_present_map);
479 static unsigned long calculate_ldr(int cpu)
481 unsigned long id = per_cpu(x86_bios_cpu_apicid, cpu);
483 return SET_APIC_LOGICAL_ID(id);
487 * Set up the logical destination ID.
489 * Intel recommends to set DFR, LdR and TPR before enabling
490 * an APIC. See e.g. "AP-388 82489DX User's Manual" (Intel
491 * document number 292116). So here it goes...
493 static void es7000_init_apic_ldr_cluster(void)
496 int cpu = smp_processor_id();
498 apic_write(APIC_DFR, APIC_DFR_CLUSTER);
499 val = calculate_ldr(cpu);
500 apic_write(APIC_LDR, val);
503 static void es7000_init_apic_ldr(void)
506 int cpu = smp_processor_id();
508 apic_write(APIC_DFR, APIC_DFR_FLAT);
509 val = calculate_ldr(cpu);
510 apic_write(APIC_LDR, val);
513 static void es7000_setup_apic_routing(void)
515 int apic = per_cpu(x86_bios_cpu_apicid, smp_processor_id());
518 "Enabling APIC mode: %s. Using %d I/O APICs, target cpus %lx\n",
519 (apic_version[apic] == 0x14) ?
520 "Physical Cluster" : "Logical Cluster",
521 nr_ioapics, cpumask_bits(es7000_target_cpus())[0]);
524 static int es7000_apicid_to_node(int logical_apicid)
530 static int es7000_cpu_present_to_apicid(int mps_cpu)
533 return boot_cpu_physical_apicid;
534 else if (mps_cpu < nr_cpu_ids)
535 return per_cpu(x86_bios_cpu_apicid, mps_cpu);
542 static physid_mask_t es7000_apicid_to_cpu_present(int phys_apicid)
546 mask = physid_mask_of_physid(cpu_id);
552 /* Mapping from cpu number to logical apicid */
553 static int es7000_cpu_to_logical_apicid(int cpu)
556 if (cpu >= nr_cpu_ids)
558 return cpu_2_logical_apicid[cpu];
560 return logical_smp_processor_id();
564 static physid_mask_t es7000_ioapic_phys_id_map(physid_mask_t phys_map)
566 /* For clustered we don't have a good way to do this yet - hack */
567 return physids_promote(0xff);
570 static int es7000_check_phys_apicid_present(int cpu_physical_apicid)
572 boot_cpu_physical_apicid = read_apic_id();
576 static unsigned int es7000_cpu_mask_to_apicid(const struct cpumask *cpumask)
578 unsigned int round = 0;
579 int cpu, uninitialized_var(apicid);
582 * The cpus in the mask must all be on the apic cluster.
584 for_each_cpu(cpu, cpumask) {
585 int new_apicid = es7000_cpu_to_logical_apicid(cpu);
587 if (round && APIC_CLUSTER(apicid) != APIC_CLUSTER(new_apicid)) {
588 WARN(1, "Not a valid mask!");
599 es7000_cpu_mask_to_apicid_and(const struct cpumask *inmask,
600 const struct cpumask *andmask)
602 int apicid = es7000_cpu_to_logical_apicid(0);
603 cpumask_var_t cpumask;
605 if (!alloc_cpumask_var(&cpumask, GFP_ATOMIC))
608 cpumask_and(cpumask, inmask, andmask);
609 cpumask_and(cpumask, cpumask, cpu_online_mask);
610 apicid = es7000_cpu_mask_to_apicid(cpumask);
612 free_cpumask_var(cpumask);
617 static int es7000_phys_pkg_id(int cpuid_apic, int index_msb)
619 return cpuid_apic >> index_msb;
622 static int probe_es7000(void)
624 /* probed later in mptable/ACPI hooks */
628 static int es7000_mps_ret;
629 static int es7000_mps_oem_check(struct mpc_table *mpc, char *oem,
635 struct mpc_oemtable *oem_table =
636 (struct mpc_oemtable *)mpc->oemptr;
638 if (!strncmp(oem, "UNISYS", 6))
639 ret = parse_unisys_oem((char *)oem_table);
642 es7000_mps_ret = ret;
644 return ret && !es7000_apic_is_cluster();
647 static int es7000_mps_oem_check_cluster(struct mpc_table *mpc, char *oem,
650 int ret = es7000_mps_ret;
652 return ret && es7000_apic_is_cluster();
655 struct apic apic_es7000_cluster = {
658 .probe = probe_es7000,
659 .acpi_madt_oem_check = es7000_acpi_madt_oem_check_cluster,
660 .apic_id_registered = es7000_apic_id_registered,
662 .irq_delivery_mode = dest_LowestPrio,
663 /* logical delivery broadcast to all procs: */
666 .target_cpus = target_cpus_cluster,
669 .check_apicid_used = es7000_check_apicid_used,
670 .check_apicid_present = es7000_check_apicid_present,
672 .vector_allocation_domain = es7000_vector_allocation_domain,
673 .init_apic_ldr = es7000_init_apic_ldr_cluster,
675 .ioapic_phys_id_map = es7000_ioapic_phys_id_map,
676 .setup_apic_routing = es7000_setup_apic_routing,
677 .multi_timer_check = NULL,
678 .apicid_to_node = es7000_apicid_to_node,
679 .cpu_to_logical_apicid = es7000_cpu_to_logical_apicid,
680 .cpu_present_to_apicid = es7000_cpu_present_to_apicid,
681 .apicid_to_cpu_present = es7000_apicid_to_cpu_present,
682 .setup_portio_remap = NULL,
683 .check_phys_apicid_present = es7000_check_phys_apicid_present,
684 .enable_apic_mode = es7000_enable_apic_mode,
685 .phys_pkg_id = es7000_phys_pkg_id,
686 .mps_oem_check = es7000_mps_oem_check_cluster,
688 .get_apic_id = es7000_get_apic_id,
690 .apic_id_mask = 0xFF << 24,
692 .cpu_mask_to_apicid = es7000_cpu_mask_to_apicid,
693 .cpu_mask_to_apicid_and = es7000_cpu_mask_to_apicid_and,
695 .send_IPI_mask = es7000_send_IPI_mask,
696 .send_IPI_mask_allbutself = NULL,
697 .send_IPI_allbutself = es7000_send_IPI_allbutself,
698 .send_IPI_all = es7000_send_IPI_all,
699 .send_IPI_self = default_send_IPI_self,
701 .wakeup_secondary_cpu = wakeup_secondary_cpu_via_mip,
703 .trampoline_phys_low = 0x467,
704 .trampoline_phys_high = 0x469,
706 .wait_for_init_deassert = NULL,
708 /* Nothing to do for most platforms, since cleared by the INIT cycle: */
709 .smp_callin_clear_local_apic = NULL,
710 .inquire_remote_apic = default_inquire_remote_apic,
712 .read = native_apic_mem_read,
713 .write = native_apic_mem_write,
714 .icr_read = native_apic_icr_read,
715 .icr_write = native_apic_icr_write,
716 .wait_icr_idle = native_apic_wait_icr_idle,
717 .safe_wait_icr_idle = native_safe_apic_wait_icr_idle,
720 struct apic apic_es7000 = {
723 .probe = probe_es7000,
724 .acpi_madt_oem_check = es7000_acpi_madt_oem_check,
725 .apic_id_registered = es7000_apic_id_registered,
727 .irq_delivery_mode = dest_Fixed,
728 /* phys delivery to target CPUs: */
731 .target_cpus = es7000_target_cpus,
734 .check_apicid_used = es7000_check_apicid_used,
735 .check_apicid_present = es7000_check_apicid_present,
737 .vector_allocation_domain = es7000_vector_allocation_domain,
738 .init_apic_ldr = es7000_init_apic_ldr,
740 .ioapic_phys_id_map = es7000_ioapic_phys_id_map,
741 .setup_apic_routing = es7000_setup_apic_routing,
742 .multi_timer_check = NULL,
743 .apicid_to_node = es7000_apicid_to_node,
744 .cpu_to_logical_apicid = es7000_cpu_to_logical_apicid,
745 .cpu_present_to_apicid = es7000_cpu_present_to_apicid,
746 .apicid_to_cpu_present = es7000_apicid_to_cpu_present,
747 .setup_portio_remap = NULL,
748 .check_phys_apicid_present = es7000_check_phys_apicid_present,
749 .enable_apic_mode = es7000_enable_apic_mode,
750 .phys_pkg_id = es7000_phys_pkg_id,
751 .mps_oem_check = es7000_mps_oem_check,
753 .get_apic_id = es7000_get_apic_id,
755 .apic_id_mask = 0xFF << 24,
757 .cpu_mask_to_apicid = es7000_cpu_mask_to_apicid,
758 .cpu_mask_to_apicid_and = es7000_cpu_mask_to_apicid_and,
760 .send_IPI_mask = es7000_send_IPI_mask,
761 .send_IPI_mask_allbutself = NULL,
762 .send_IPI_allbutself = es7000_send_IPI_allbutself,
763 .send_IPI_all = es7000_send_IPI_all,
764 .send_IPI_self = default_send_IPI_self,
766 .trampoline_phys_low = 0x467,
767 .trampoline_phys_high = 0x469,
769 .wait_for_init_deassert = es7000_wait_for_init_deassert,
771 /* Nothing to do for most platforms, since cleared by the INIT cycle: */
772 .smp_callin_clear_local_apic = NULL,
773 .inquire_remote_apic = default_inquire_remote_apic,
775 .read = native_apic_mem_read,
776 .write = native_apic_mem_write,
777 .icr_read = native_apic_icr_read,
778 .icr_write = native_apic_icr_write,
779 .wait_icr_idle = native_apic_wait_icr_idle,
780 .safe_wait_icr_idle = native_safe_apic_wait_icr_idle,