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.
7 * Copyright (c) 2003 Unisys Corporation. All Rights Reserved.
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.
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.
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.
21 * Contact information: Unisys Corporation, Township Line & Union Meeting
22 * Roads-A, Unisys Way, Blue Bell, Pennsylvania, 19424, or:
24 * http://www.unisys.com
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>
41 #include <asm/atomic.h>
42 #include <asm/apicdef.h>
43 #include <asm/genapic.h>
44 #include <asm/setup.h>
51 #define ES7000_CLASSIC 1
52 #define ES7000_ZORRO 2
56 #define MIP_PSAI_REG 4
59 #define MIP_SPIN 0xf0000
60 #define MIP_VALID 0x0100000000000000ULL
61 #define MIP_PORT(VALUE) ((VALUE >> 32) & 0xffff)
63 #define MIP_RD_LO(VALUE) (VALUE & 0xffffffff)
66 unsigned long long mip_info;
67 unsigned long long delivery_info;
68 unsigned long long host_reg;
69 unsigned long long mip_reg;
75 unsigned char part_id;
76 unsigned char apic_mode;
84 unsigned long long entry_type;
85 unsigned long long addr;
86 unsigned long long bep_addr;
89 struct es7000_mem_info {
92 unsigned char resv[6];
93 unsigned long long start;
94 unsigned long long size;
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;
108 struct acpi_table_header Header;
113 extern int find_unisys_acpi_oem_table(unsigned long *oem_addr);
114 extern void unmap_unisys_acpi_oem_table(unsigned long oem_addr);
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;
128 #define MIP_SW_APIC 0x1020b
129 #define MIP_FUNC(VALUE) (VALUE & 0xff)
135 static volatile unsigned long *psai = NULL;
136 static struct mip_reg *mip_reg;
137 static struct mip_reg *host_reg;
139 static unsigned long mip_addr, host_addr;
144 * GSI override for ES7000 platforms.
147 static unsigned int base;
150 es7000_rename_gsi(int ioapic, int gsi)
152 if (es7000_plat == ES7000_ZORRO)
157 for (i = 0; i < nr_ioapics; i++)
158 base += nr_ioapic_registers[i];
161 if (!ioapic && (gsi < 16))
166 static int wakeup_secondary_cpu_via_mip(int cpu, unsigned long eip)
168 unsigned long vect = 0, psaival = 0;
173 vect = ((unsigned long)__pa(eip)/0x1000) << 16;
174 psaival = (0x1000000 | vect | cpu);
176 while (*psai & 0x1000000)
184 static int __init es7000_update_genapic(void)
186 apic->wakeup_cpu = wakeup_secondary_cpu_via_mip;
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;
203 * Determine the generation of the ES7000 currently running.
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
209 if (!(boot_cpu_data.x86 <= 15 && boot_cpu_data.x86_model <= 2))
210 es7000_plat = ES7000_ZORRO;
212 es7000_plat = ES7000_CLASSIC;
213 ioapic_renumber_irq = es7000_rename_gsi;
215 x86_quirks->update_genapic = es7000_update_genapic;
219 * Parse the OEM Table
223 parse_unisys_oem (char *oemptr)
227 unsigned char type, size;
230 struct psai *psaip = NULL;
231 struct mip_reg_info *mi;
232 struct mip_reg *host, *mip;
238 for (i=0; i <= 6; i++) {
244 mi = (struct mip_reg_info *)tp;
245 val = MIP_RD_LO(mi->host_reg);
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);
252 mip = (struct mip_reg *)val;
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);
261 psaip = (struct psai *)tp;
264 psai = __va(psaip->addr);
277 es7000_plat = NON_UNISYS;
284 static unsigned long oem_addrX;
285 static unsigned long oem_size;
286 int __init find_unisys_acpi_oem_table(unsigned long *oem_addr)
288 struct acpi_table_header *header = NULL;
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;
296 oem_addrX = t->OEMTableAddr;
297 oem_size = t->OEMTableSize;
298 early_acpi_os_unmap_memory(header, tbl_size);
300 *oem_addr = (unsigned long)__acpi_map_table(oem_addrX,
304 early_acpi_os_unmap_memory(header, tbl_size);
309 void __init unmap_unisys_acpi_oem_table(unsigned long oem_addr)
314 __acpi_unmap_table((char *)oem_addr, oem_size);
328 es7000_mip_write(struct mip_reg *mip_reg)
334 while (((unsigned long long)host_reg->off_38 &
335 (unsigned long long)MIP_VALID) != 0) {
337 printk("es7000_mip_write: Timeout waiting for Host Valid Flag");
340 es7000_spin(MIP_SPIN);
343 memcpy(host_reg, mip_reg, sizeof(struct mip_reg));
348 while (((unsigned long long)mip_reg->off_38 &
349 (unsigned long long)MIP_VALID) == 0) {
351 printk("es7000_mip_write: Timeout waiting for MIP Valid Flag");
354 es7000_spin(MIP_SPIN);
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);
364 void __init es7000_enable_apic_mode(void)
366 struct mip_reg es7000_mip_reg;
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;
377 while ((mip_status = es7000_mip_write(&es7000_mip_reg)) != 0) {
378 printk("es7000_enable_apic_mode: command failed, status = %x\n",
384 * APIC driver for the Unisys ES7000 chipset.
386 #define APIC_DEFINITION 1
387 #include <linux/threads.h>
388 #include <linux/cpumask.h>
389 #include <asm/mpspec.h>
390 #include <asm/genapic.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>
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 */
404 #define APIC_DFR_VALUE (APIC_DFR_FLAT)
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;
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);
416 #define apicid_cluster(apicid) (apicid & 0xF0)
417 #define xapic_phys_to_log_apicid(cpu) per_cpu(x86_bios_cpu_apicid, cpu)
419 static void es7000_vector_allocation_domain(int cpu, cpumask_t *retmask)
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.
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.
429 *retmask = (cpumask_t){ { [0] = APIC_ALL_CPUS, } };
433 static void es7000_wait_for_init_deassert(atomic_t *deassert)
435 #ifndef CONFIG_ES7000_CLUSTERED_APIC
436 while (!atomic_read(deassert))
442 static unsigned int es7000_get_apic_id(unsigned long x)
444 return (x >> 24) & 0xFF;
448 static int es7000_check_dsdt(void)
450 struct acpi_table_header header;
452 if (ACPI_SUCCESS(acpi_get_table_header(ACPI_SIG_DSDT, 0, &header)) &&
453 !strncmp(header.oem_id, "UNISYS", 6))
459 static void es7000_send_IPI_mask(const struct cpumask *mask, int vector)
461 default_send_IPI_mask_sequence_phys(mask, vector);
464 static void es7000_send_IPI_allbutself(int vector)
466 default_send_IPI_mask_allbutself_phys(cpu_online_mask, vector);
469 static void es7000_send_IPI_all(int vector)
471 es7000_send_IPI_mask(cpu_online_mask, vector);
474 static int es7000_apic_id_registered(void)
479 static const cpumask_t *target_cpus_cluster(void)
481 return &CPU_MASK_ALL;
484 static const cpumask_t *es7000_target_cpus(void)
486 return &cpumask_of_cpu(smp_processor_id());
490 es7000_check_apicid_used(physid_mask_t bitmap, int apicid)
494 static unsigned long es7000_check_apicid_present(int bit)
496 return physid_isset(bit, phys_cpu_present_map);
499 static unsigned long calculate_ldr(int cpu)
501 unsigned long id = xapic_phys_to_log_apicid(cpu);
503 return (SET_APIC_LOGICAL_ID(id));
507 * Set up the logical destination ID.
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...
513 static void es7000_init_apic_ldr_cluster(void)
516 int cpu = smp_processor_id();
518 apic_write(APIC_DFR, APIC_DFR_VALUE_CLUSTER);
519 val = calculate_ldr(cpu);
520 apic_write(APIC_LDR, val);
523 static void es7000_init_apic_ldr(void)
526 int cpu = smp_processor_id();
528 apic_write(APIC_DFR, APIC_DFR_VALUE);
529 val = calculate_ldr(cpu);
530 apic_write(APIC_LDR, val);
533 static void es7000_setup_apic_routing(void)
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]);
542 static int es7000_apicid_to_node(int logical_apicid)
548 static int es7000_cpu_present_to_apicid(int 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);
558 static physid_mask_t es7000_apicid_to_cpu_present(int phys_apicid)
563 mask = physid_mask_of_physid(id);
569 /* Mapping from cpu number to logical apicid */
570 static int es7000_cpu_to_logical_apicid(int cpu)
573 if (cpu >= nr_cpu_ids)
575 return (int)cpu_2_logical_apicid[cpu];
577 return logical_smp_processor_id();
581 static physid_mask_t es7000_ioapic_phys_id_map(physid_mask_t phys_map)
583 /* For clustered we don't have a good way to do this yet - hack */
584 return physids_promote(0xff);
587 static int es7000_check_phys_apicid_present(int cpu_physical_apicid)
589 boot_cpu_physical_apicid = read_apic_id();
594 es7000_cpu_mask_to_apicid_cluster(const struct cpumask *cpumask)
601 num_bits_set = cpumask_weight(cpumask);
602 /* Return id to all */
603 if (num_bits_set == nr_cpu_ids)
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():
609 cpu = cpumask_first(cpumask);
610 apicid = es7000_cpu_to_logical_apicid(cpu);
612 while (cpus_found < num_bits_set) {
613 if (cpumask_test_cpu(cpu, cpumask)) {
614 int new_apicid = es7000_cpu_to_logical_apicid(cpu);
616 if (apicid_cluster(apicid) !=
617 apicid_cluster(new_apicid)) {
618 printk ("%s: Not a valid mask!\n", __func__);
630 static unsigned int es7000_cpu_mask_to_apicid(const cpumask_t *cpumask)
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);
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():
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);
651 if (apicid_cluster(apicid) !=
652 apicid_cluster(new_apicid)) {
653 printk ("%s: Not a valid mask!\n", __func__);
655 return es7000_cpu_to_logical_apicid(0);
666 es7000_cpu_mask_to_apicid_and(const struct cpumask *inmask,
667 const struct cpumask *andmask)
669 int apicid = es7000_cpu_to_logical_apicid(0);
670 cpumask_var_t cpumask;
672 if (!alloc_cpumask_var(&cpumask, GFP_ATOMIC))
675 cpumask_and(cpumask, inmask, andmask);
676 cpumask_and(cpumask, cpumask, cpu_online_mask);
677 apicid = es7000_cpu_mask_to_apicid(cpumask);
679 free_cpumask_var(cpumask);
684 static int es7000_phys_pkg_id(int cpuid_apic, int index_msb)
686 return cpuid_apic >> index_msb;
689 void __init es7000_update_genapic_to_cluster(void)
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;
695 apic->init_apic_ldr = es7000_init_apic_ldr_cluster;
697 apic->cpu_mask_to_apicid = es7000_cpu_mask_to_apicid_cluster;
700 static int probe_es7000(void)
702 /* probed later in mptable/ACPI hooks */
707 es7000_mps_oem_check(struct mpc_table *mpc, char *oem, char *productid)
710 struct mpc_oemtable *oem_table =
711 (struct mpc_oemtable *)mpc->oemptr;
713 if (!strncmp(oem, "UNISYS", 6))
714 return parse_unisys_oem((char *)oem_table);
720 /* Hook from generic ACPI tables.c */
721 static int __init es7000_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
723 unsigned long oem_addr = 0;
727 /* check dsdt at first to avoid clear fix_map for oem_addr */
728 check_dsdt = es7000_check_dsdt();
730 if (!find_unisys_acpi_oem_table(&oem_addr)) {
732 ret = parse_unisys_oem((char *)oem_addr);
738 * we need to unmap it
740 unmap_unisys_acpi_oem_table(oem_addr);
745 static int __init es7000_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
752 struct genapic apic_es7000 = {
755 .probe = probe_es7000,
756 .acpi_madt_oem_check = es7000_acpi_madt_oem_check,
757 .apic_id_registered = es7000_apic_id_registered,
759 .irq_delivery_mode = dest_Fixed,
760 /* phys delivery to target CPUs: */
763 .target_cpus = es7000_target_cpus,
766 .check_apicid_used = es7000_check_apicid_used,
767 .check_apicid_present = es7000_check_apicid_present,
769 .vector_allocation_domain = es7000_vector_allocation_domain,
770 .init_apic_ldr = es7000_init_apic_ldr,
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,
785 .get_apic_id = es7000_get_apic_id,
787 .apic_id_mask = 0xFF << 24,
789 .cpu_mask_to_apicid = es7000_cpu_mask_to_apicid,
790 .cpu_mask_to_apicid_and = es7000_cpu_mask_to_apicid_and,
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,
800 .trampoline_phys_low = 0x467,
801 .trampoline_phys_high = 0x469,
803 .wait_for_init_deassert = es7000_wait_for_init_deassert,
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,