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
, cpumask_t
*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 *retmask
= (cpumask_t
){ { [0] = APIC_ALL_CPUS
, } };
427 static void es7000_wait_for_init_deassert(atomic_t
*deassert
)
429 while (!atomic_read(deassert
))
433 static unsigned int es7000_get_apic_id(unsigned long x
)
435 return (x
>> 24) & 0xFF;
438 static void es7000_send_IPI_mask(const struct cpumask
*mask
, int vector
)
440 default_send_IPI_mask_sequence_phys(mask
, vector
);
443 static void es7000_send_IPI_allbutself(int vector
)
445 default_send_IPI_mask_allbutself_phys(cpu_online_mask
, vector
);
448 static void es7000_send_IPI_all(int vector
)
450 es7000_send_IPI_mask(cpu_online_mask
, vector
);
453 static int es7000_apic_id_registered(void)
458 static const cpumask_t
*target_cpus_cluster(void)
463 static const struct cpumask
*es7000_target_cpus(void)
465 return cpumask_of(smp_processor_id());
469 es7000_check_apicid_used(physid_mask_t bitmap
, int apicid
)
473 static unsigned long es7000_check_apicid_present(int bit
)
475 return physid_isset(bit
, phys_cpu_present_map
);
478 static unsigned long calculate_ldr(int cpu
)
480 unsigned long id
= per_cpu(x86_bios_cpu_apicid
, cpu
);
482 return SET_APIC_LOGICAL_ID(id
);
486 * Set up the logical destination ID.
488 * Intel recommends to set DFR, LdR and TPR before enabling
489 * an APIC. See e.g. "AP-388 82489DX User's Manual" (Intel
490 * document number 292116). So here it goes...
492 static void es7000_init_apic_ldr_cluster(void)
495 int cpu
= smp_processor_id();
497 apic_write(APIC_DFR
, APIC_DFR_CLUSTER
);
498 val
= calculate_ldr(cpu
);
499 apic_write(APIC_LDR
, val
);
502 static void es7000_init_apic_ldr(void)
505 int cpu
= smp_processor_id();
507 apic_write(APIC_DFR
, APIC_DFR_FLAT
);
508 val
= calculate_ldr(cpu
);
509 apic_write(APIC_LDR
, val
);
512 static void es7000_setup_apic_routing(void)
514 int apic
= per_cpu(x86_bios_cpu_apicid
, smp_processor_id());
517 "Enabling APIC mode: %s. Using %d I/O APICs, target cpus %lx\n",
518 (apic_version
[apic
] == 0x14) ?
519 "Physical Cluster" : "Logical Cluster",
520 nr_ioapics
, cpumask_bits(es7000_target_cpus())[0]);
523 static int es7000_apicid_to_node(int logical_apicid
)
529 static int es7000_cpu_present_to_apicid(int mps_cpu
)
532 return boot_cpu_physical_apicid
;
533 else if (mps_cpu
< nr_cpu_ids
)
534 return per_cpu(x86_bios_cpu_apicid
, mps_cpu
);
541 static physid_mask_t
es7000_apicid_to_cpu_present(int phys_apicid
)
545 mask
= physid_mask_of_physid(cpu_id
);
551 /* Mapping from cpu number to logical apicid */
552 static int es7000_cpu_to_logical_apicid(int cpu
)
555 if (cpu
>= nr_cpu_ids
)
557 return cpu_2_logical_apicid
[cpu
];
559 return logical_smp_processor_id();
563 static physid_mask_t
es7000_ioapic_phys_id_map(physid_mask_t phys_map
)
565 /* For clustered we don't have a good way to do this yet - hack */
566 return physids_promote(0xff);
569 static int es7000_check_phys_apicid_present(int cpu_physical_apicid
)
571 boot_cpu_physical_apicid
= read_apic_id();
575 static unsigned int es7000_cpu_mask_to_apicid(const cpumask_t
*cpumask
)
577 unsigned int round
= 0;
578 int cpu
, uninitialized_var(apicid
);
581 * The cpus in the mask must all be on the apic cluster.
583 for_each_cpu(cpu
, cpumask
) {
584 int new_apicid
= es7000_cpu_to_logical_apicid(cpu
);
586 if (round
&& APIC_CLUSTER(apicid
) != APIC_CLUSTER(new_apicid
)) {
587 WARN(1, "Not a valid mask!");
598 es7000_cpu_mask_to_apicid_and(const struct cpumask
*inmask
,
599 const struct cpumask
*andmask
)
601 int apicid
= es7000_cpu_to_logical_apicid(0);
602 cpumask_var_t cpumask
;
604 if (!alloc_cpumask_var(&cpumask
, GFP_ATOMIC
))
607 cpumask_and(cpumask
, inmask
, andmask
);
608 cpumask_and(cpumask
, cpumask
, cpu_online_mask
);
609 apicid
= es7000_cpu_mask_to_apicid(cpumask
);
611 free_cpumask_var(cpumask
);
616 static int es7000_phys_pkg_id(int cpuid_apic
, int index_msb
)
618 return cpuid_apic
>> index_msb
;
621 static int probe_es7000(void)
623 /* probed later in mptable/ACPI hooks */
627 static int es7000_mps_ret
;
628 static int es7000_mps_oem_check(struct mpc_table
*mpc
, char *oem
,
634 struct mpc_oemtable
*oem_table
=
635 (struct mpc_oemtable
*)mpc
->oemptr
;
637 if (!strncmp(oem
, "UNISYS", 6))
638 ret
= parse_unisys_oem((char *)oem_table
);
641 es7000_mps_ret
= ret
;
643 return ret
&& !es7000_apic_is_cluster();
646 static int es7000_mps_oem_check_cluster(struct mpc_table
*mpc
, char *oem
,
649 int ret
= es7000_mps_ret
;
651 return ret
&& es7000_apic_is_cluster();
654 struct apic apic_es7000_cluster
= {
657 .probe
= probe_es7000
,
658 .acpi_madt_oem_check
= es7000_acpi_madt_oem_check_cluster
,
659 .apic_id_registered
= es7000_apic_id_registered
,
661 .irq_delivery_mode
= dest_LowestPrio
,
662 /* logical delivery broadcast to all procs: */
665 .target_cpus
= target_cpus_cluster
,
668 .check_apicid_used
= es7000_check_apicid_used
,
669 .check_apicid_present
= es7000_check_apicid_present
,
671 .vector_allocation_domain
= es7000_vector_allocation_domain
,
672 .init_apic_ldr
= es7000_init_apic_ldr_cluster
,
674 .ioapic_phys_id_map
= es7000_ioapic_phys_id_map
,
675 .setup_apic_routing
= es7000_setup_apic_routing
,
676 .multi_timer_check
= NULL
,
677 .apicid_to_node
= es7000_apicid_to_node
,
678 .cpu_to_logical_apicid
= es7000_cpu_to_logical_apicid
,
679 .cpu_present_to_apicid
= es7000_cpu_present_to_apicid
,
680 .apicid_to_cpu_present
= es7000_apicid_to_cpu_present
,
681 .setup_portio_remap
= NULL
,
682 .check_phys_apicid_present
= es7000_check_phys_apicid_present
,
683 .enable_apic_mode
= es7000_enable_apic_mode
,
684 .phys_pkg_id
= es7000_phys_pkg_id
,
685 .mps_oem_check
= es7000_mps_oem_check_cluster
,
687 .get_apic_id
= es7000_get_apic_id
,
689 .apic_id_mask
= 0xFF << 24,
691 .cpu_mask_to_apicid
= es7000_cpu_mask_to_apicid
,
692 .cpu_mask_to_apicid_and
= es7000_cpu_mask_to_apicid_and
,
694 .send_IPI_mask
= es7000_send_IPI_mask
,
695 .send_IPI_mask_allbutself
= NULL
,
696 .send_IPI_allbutself
= es7000_send_IPI_allbutself
,
697 .send_IPI_all
= es7000_send_IPI_all
,
698 .send_IPI_self
= default_send_IPI_self
,
700 .wakeup_secondary_cpu
= wakeup_secondary_cpu_via_mip
,
702 .trampoline_phys_low
= 0x467,
703 .trampoline_phys_high
= 0x469,
705 .wait_for_init_deassert
= NULL
,
707 /* Nothing to do for most platforms, since cleared by the INIT cycle: */
708 .smp_callin_clear_local_apic
= NULL
,
709 .inquire_remote_apic
= default_inquire_remote_apic
,
711 .read
= native_apic_mem_read
,
712 .write
= native_apic_mem_write
,
713 .icr_read
= native_apic_icr_read
,
714 .icr_write
= native_apic_icr_write
,
715 .wait_icr_idle
= native_apic_wait_icr_idle
,
716 .safe_wait_icr_idle
= native_safe_apic_wait_icr_idle
,
719 struct apic apic_es7000
= {
722 .probe
= probe_es7000
,
723 .acpi_madt_oem_check
= es7000_acpi_madt_oem_check
,
724 .apic_id_registered
= es7000_apic_id_registered
,
726 .irq_delivery_mode
= dest_Fixed
,
727 /* phys delivery to target CPUs: */
730 .target_cpus
= es7000_target_cpus
,
733 .check_apicid_used
= es7000_check_apicid_used
,
734 .check_apicid_present
= es7000_check_apicid_present
,
736 .vector_allocation_domain
= es7000_vector_allocation_domain
,
737 .init_apic_ldr
= es7000_init_apic_ldr
,
739 .ioapic_phys_id_map
= es7000_ioapic_phys_id_map
,
740 .setup_apic_routing
= es7000_setup_apic_routing
,
741 .multi_timer_check
= NULL
,
742 .apicid_to_node
= es7000_apicid_to_node
,
743 .cpu_to_logical_apicid
= es7000_cpu_to_logical_apicid
,
744 .cpu_present_to_apicid
= es7000_cpu_present_to_apicid
,
745 .apicid_to_cpu_present
= es7000_apicid_to_cpu_present
,
746 .setup_portio_remap
= NULL
,
747 .check_phys_apicid_present
= es7000_check_phys_apicid_present
,
748 .enable_apic_mode
= es7000_enable_apic_mode
,
749 .phys_pkg_id
= es7000_phys_pkg_id
,
750 .mps_oem_check
= es7000_mps_oem_check
,
752 .get_apic_id
= es7000_get_apic_id
,
754 .apic_id_mask
= 0xFF << 24,
756 .cpu_mask_to_apicid
= es7000_cpu_mask_to_apicid
,
757 .cpu_mask_to_apicid_and
= es7000_cpu_mask_to_apicid_and
,
759 .send_IPI_mask
= es7000_send_IPI_mask
,
760 .send_IPI_mask_allbutself
= NULL
,
761 .send_IPI_allbutself
= es7000_send_IPI_allbutself
,
762 .send_IPI_all
= es7000_send_IPI_all
,
763 .send_IPI_self
= default_send_IPI_self
,
765 .trampoline_phys_low
= 0x467,
766 .trampoline_phys_high
= 0x469,
768 .wait_for_init_deassert
= es7000_wait_for_init_deassert
,
770 /* Nothing to do for most platforms, since cleared by the INIT cycle: */
771 .smp_callin_clear_local_apic
= NULL
,
772 .inquire_remote_apic
= default_inquire_remote_apic
,
774 .read
= native_apic_mem_read
,
775 .write
= native_apic_mem_write
,
776 .icr_read
= native_apic_icr_read
,
777 .icr_write
= native_apic_icr_write
,
778 .wait_icr_idle
= native_apic_wait_icr_idle
,
779 .safe_wait_icr_idle
= native_safe_apic_wait_icr_idle
,