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/nmi.h>
46 #include <linux/smp.h>
49 #include <asm/apicdef.h>
50 #include <asm/atomic.h>
51 #include <asm/fixmap.h>
52 #include <asm/mpspec.h>
53 #include <asm/setup.h>
62 #define ES7000_CLASSIC 1
63 #define ES7000_ZORRO 2
66 #define MIP_PSAI_REG 4
69 #define MIP_SPIN 0xf0000
70 #define MIP_VALID 0x0100000000000000ULL
71 #define MIP_SW_APIC 0x1020b
73 #define MIP_PORT(val) ((val >> 32) & 0xffff)
75 #define MIP_RD_LO(val) (val & 0xffffffff)
78 unsigned long long off_0x00
;
79 unsigned long long off_0x08
;
80 unsigned long long off_0x10
;
81 unsigned long long off_0x18
;
82 unsigned long long off_0x20
;
83 unsigned long long off_0x28
;
84 unsigned long long off_0x30
;
85 unsigned long long off_0x38
;
89 unsigned long long mip_info
;
90 unsigned long long delivery_info
;
91 unsigned long long host_reg
;
92 unsigned long long mip_reg
;
96 unsigned long long entry_type
;
97 unsigned long long addr
;
98 unsigned long long bep_addr
;
103 struct es7000_oem_table
{
104 struct acpi_table_header Header
;
109 static unsigned long oem_addrX
;
110 static unsigned long oem_size
;
118 static volatile unsigned long *psai
;
119 static struct mip_reg
*mip_reg
;
120 static struct mip_reg
*host_reg
;
122 static unsigned long mip_addr
;
123 static unsigned long host_addr
;
128 * GSI override for ES7000 platforms.
131 static unsigned int base
;
134 es7000_rename_gsi(int ioapic
, int gsi
)
136 if (es7000_plat
== ES7000_ZORRO
)
141 for (i
= 0; i
< nr_ioapics
; i
++)
142 base
+= nr_ioapic_registers
[i
];
145 if (!ioapic
&& (gsi
< 16))
151 static int __cpuinit
wakeup_secondary_cpu_via_mip(int cpu
, unsigned long eip
)
153 unsigned long vect
= 0, psaival
= 0;
158 vect
= ((unsigned long)__pa(eip
)/0x1000) << 16;
159 psaival
= (0x1000000 | vect
| cpu
);
161 while (*psai
& 0x1000000)
169 static int es7000_apic_is_cluster(void)
172 if (boot_cpu_data
.x86
== 6 &&
173 (boot_cpu_data
.x86_model
>= 7 && boot_cpu_data
.x86_model
<= 11))
179 static void setup_unisys(void)
182 * Determine the generation of the ES7000 currently running.
184 * es7000_plat = 1 if the machine is a 5xx ES7000 box
185 * es7000_plat = 2 if the machine is a x86_64 ES7000 box
188 if (!(boot_cpu_data
.x86
<= 15 && boot_cpu_data
.x86_model
<= 2))
189 es7000_plat
= ES7000_ZORRO
;
191 es7000_plat
= ES7000_CLASSIC
;
192 ioapic_renumber_irq
= es7000_rename_gsi
;
196 * Parse the OEM Table:
198 static int parse_unisys_oem(char *oemptr
)
202 unsigned char type
, size
;
205 struct psai
*psaip
= NULL
;
206 struct mip_reg_info
*mi
;
207 struct mip_reg
*host
, *mip
;
213 for (i
= 0; i
<= 6; i
++) {
219 mi
= (struct mip_reg_info
*)tp
;
220 val
= MIP_RD_LO(mi
->host_reg
);
222 host
= (struct mip_reg
*)val
;
223 host_reg
= __va(host
);
224 val
= MIP_RD_LO(mi
->mip_reg
);
225 mip_port
= MIP_PORT(mi
->mip_info
);
227 mip
= (struct mip_reg
*)val
;
229 pr_debug("host_reg = 0x%lx\n",
230 (unsigned long)host_reg
);
231 pr_debug("mip_reg = 0x%lx\n",
232 (unsigned long)mip_reg
);
236 psaip
= (struct psai
*)tp
;
239 psai
= __va(psaip
->addr
);
252 es7000_plat
= NON_UNISYS
;
260 static int __init
find_unisys_acpi_oem_table(unsigned long *oem_addr
)
262 struct acpi_table_header
*header
= NULL
;
263 struct es7000_oem_table
*table
;
269 ret
= acpi_get_table_with_size("OEM1", i
++, &header
, &tbl_size
);
270 if (!ACPI_SUCCESS(ret
))
273 if (!memcmp((char *) &header
->oem_id
, "UNISYS", 6))
276 early_acpi_os_unmap_memory(header
, tbl_size
);
279 table
= (void *)header
;
281 oem_addrX
= table
->OEMTableAddr
;
282 oem_size
= table
->OEMTableSize
;
284 early_acpi_os_unmap_memory(header
, tbl_size
);
286 *oem_addr
= (unsigned long)__acpi_map_table(oem_addrX
, oem_size
);
291 static void __init
unmap_unisys_acpi_oem_table(unsigned long oem_addr
)
296 __acpi_unmap_table((char *)oem_addr
, oem_size
);
299 static int es7000_check_dsdt(void)
301 struct acpi_table_header header
;
303 if (ACPI_SUCCESS(acpi_get_table_header(ACPI_SIG_DSDT
, 0, &header
)) &&
304 !strncmp(header
.oem_id
, "UNISYS", 6))
309 static int es7000_acpi_ret
;
311 /* Hook from generic ACPI tables.c */
312 static int __init
es7000_acpi_madt_oem_check(char *oem_id
, char *oem_table_id
)
314 unsigned long oem_addr
= 0;
318 /* check dsdt at first to avoid clear fix_map for oem_addr */
319 check_dsdt
= es7000_check_dsdt();
321 if (!find_unisys_acpi_oem_table(&oem_addr
)) {
323 ret
= parse_unisys_oem((char *)oem_addr
);
329 * we need to unmap it
331 unmap_unisys_acpi_oem_table(oem_addr
);
334 es7000_acpi_ret
= ret
;
336 return ret
&& !es7000_apic_is_cluster();
339 static int es7000_acpi_madt_oem_check_cluster(char *oem_id
, char *oem_table_id
)
341 int ret
= es7000_acpi_ret
;
343 return ret
&& es7000_apic_is_cluster();
346 #else /* !CONFIG_ACPI: */
347 static int es7000_acpi_madt_oem_check(char *oem_id
, char *oem_table_id
)
352 static int es7000_acpi_madt_oem_check_cluster(char *oem_id
, char *oem_table_id
)
356 #endif /* !CONFIG_ACPI */
358 static void es7000_spin(int n
)
366 static int es7000_mip_write(struct mip_reg
*mip_reg
)
372 while ((host_reg
->off_0x38
& MIP_VALID
) != 0) {
374 WARN(1, "Timeout waiting for Host Valid Flag\n");
377 es7000_spin(MIP_SPIN
);
380 memcpy(host_reg
, mip_reg
, sizeof(struct mip_reg
));
385 while ((mip_reg
->off_0x38
& MIP_VALID
) == 0) {
387 WARN(1, "Timeout waiting for MIP Valid Flag\n");
390 es7000_spin(MIP_SPIN
);
393 status
= (mip_reg
->off_0x00
& 0xffff0000000000ULL
) >> 48;
394 mip_reg
->off_0x38
&= ~MIP_VALID
;
399 static void es7000_enable_apic_mode(void)
401 struct mip_reg es7000_mip_reg
;
407 pr_info("Enabling APIC mode.\n");
408 memset(&es7000_mip_reg
, 0, sizeof(struct mip_reg
));
409 es7000_mip_reg
.off_0x00
= MIP_SW_APIC
;
410 es7000_mip_reg
.off_0x38
= MIP_VALID
;
412 while ((mip_status
= es7000_mip_write(&es7000_mip_reg
)) != 0)
413 WARN(1, "Command failed, status = %x\n", mip_status
);
416 static void es7000_vector_allocation_domain(int cpu
, struct cpumask
*retmask
)
418 /* Careful. Some cpus do not strictly honor the set of cpus
419 * specified in the interrupt destination when using lowest
420 * priority interrupt delivery mode.
422 * In particular there was a hyperthreading cpu observed to
423 * deliver interrupts to the wrong hyperthread when only one
424 * hyperthread was specified in the interrupt desitination.
426 cpumask_clear(retmask
);
427 cpumask_bits(retmask
)[0] = APIC_ALL_CPUS
;
431 static void es7000_wait_for_init_deassert(atomic_t
*deassert
)
433 while (!atomic_read(deassert
))
437 static unsigned int es7000_get_apic_id(unsigned long x
)
439 return (x
>> 24) & 0xFF;
442 static void es7000_send_IPI_mask(const struct cpumask
*mask
, int vector
)
444 default_send_IPI_mask_sequence_phys(mask
, vector
);
447 static void es7000_send_IPI_allbutself(int vector
)
449 default_send_IPI_mask_allbutself_phys(cpu_online_mask
, vector
);
452 static void es7000_send_IPI_all(int vector
)
454 es7000_send_IPI_mask(cpu_online_mask
, vector
);
457 static int es7000_apic_id_registered(void)
462 static const struct cpumask
*target_cpus_cluster(void)
467 static const struct cpumask
*es7000_target_cpus(void)
469 return cpumask_of(smp_processor_id());
472 static unsigned long es7000_check_apicid_used(physid_mask_t
*map
, int apicid
)
477 static unsigned long es7000_check_apicid_present(int bit
)
479 return physid_isset(bit
, phys_cpu_present_map
);
482 static unsigned long calculate_ldr(int cpu
)
484 unsigned long id
= per_cpu(x86_bios_cpu_apicid
, cpu
);
486 return SET_APIC_LOGICAL_ID(id
);
490 * Set up the logical destination ID.
492 * Intel recommends to set DFR, LdR and TPR before enabling
493 * an APIC. See e.g. "AP-388 82489DX User's Manual" (Intel
494 * document number 292116). So here it goes...
496 static void es7000_init_apic_ldr_cluster(void)
499 int cpu
= smp_processor_id();
501 apic_write(APIC_DFR
, APIC_DFR_CLUSTER
);
502 val
= calculate_ldr(cpu
);
503 apic_write(APIC_LDR
, val
);
506 static void es7000_init_apic_ldr(void)
509 int cpu
= smp_processor_id();
511 apic_write(APIC_DFR
, APIC_DFR_FLAT
);
512 val
= calculate_ldr(cpu
);
513 apic_write(APIC_LDR
, val
);
516 static void es7000_setup_apic_routing(void)
518 int apic
= per_cpu(x86_bios_cpu_apicid
, smp_processor_id());
520 pr_info("Enabling APIC mode: %s. Using %d I/O APICs, target cpus %lx\n",
521 (apic_version
[apic
] == 0x14) ?
522 "Physical Cluster" : "Logical Cluster",
523 nr_ioapics
, cpumask_bits(es7000_target_cpus())[0]);
526 static int es7000_apicid_to_node(int logical_apicid
)
532 static int es7000_cpu_present_to_apicid(int mps_cpu
)
535 return boot_cpu_physical_apicid
;
536 else if (mps_cpu
< nr_cpu_ids
)
537 return per_cpu(x86_bios_cpu_apicid
, mps_cpu
);
544 static void es7000_apicid_to_cpu_present(int phys_apicid
, physid_mask_t
*retmap
)
546 physid_set_mask_of_physid(cpu_id
, retmap
);
550 /* Mapping from cpu number to logical apicid */
551 static int es7000_cpu_to_logical_apicid(int cpu
)
554 if (cpu
>= nr_cpu_ids
)
556 return cpu_2_logical_apicid
[cpu
];
558 return logical_smp_processor_id();
562 static void es7000_ioapic_phys_id_map(physid_mask_t
*phys_map
, physid_mask_t
*retmap
)
564 /* For clustered we don't have a good way to do this yet - hack */
565 physids_promote(0xFFL
, retmap
);
568 static int es7000_check_phys_apicid_present(int cpu_physical_apicid
)
570 boot_cpu_physical_apicid
= read_apic_id();
574 static unsigned int es7000_cpu_mask_to_apicid(const struct cpumask
*cpumask
)
576 unsigned int round
= 0;
577 int cpu
, uninitialized_var(apicid
);
580 * The cpus in the mask must all be on the apic cluster.
582 for_each_cpu(cpu
, cpumask
) {
583 int new_apicid
= es7000_cpu_to_logical_apicid(cpu
);
585 if (round
&& APIC_CLUSTER(apicid
) != APIC_CLUSTER(new_apicid
)) {
586 WARN(1, "Not a valid mask!");
597 es7000_cpu_mask_to_apicid_and(const struct cpumask
*inmask
,
598 const struct cpumask
*andmask
)
600 int apicid
= es7000_cpu_to_logical_apicid(0);
601 cpumask_var_t cpumask
;
603 if (!alloc_cpumask_var(&cpumask
, GFP_ATOMIC
))
606 cpumask_and(cpumask
, inmask
, andmask
);
607 cpumask_and(cpumask
, cpumask
, cpu_online_mask
);
608 apicid
= es7000_cpu_mask_to_apicid(cpumask
);
610 free_cpumask_var(cpumask
);
615 static int es7000_phys_pkg_id(int cpuid_apic
, int index_msb
)
617 return cpuid_apic
>> index_msb
;
620 static int probe_es7000(void)
622 /* probed later in mptable/ACPI hooks */
626 static int es7000_mps_ret
;
627 static int es7000_mps_oem_check(struct mpc_table
*mpc
, char *oem
,
633 struct mpc_oemtable
*oem_table
=
634 (struct mpc_oemtable
*)mpc
->oemptr
;
636 if (!strncmp(oem
, "UNISYS", 6))
637 ret
= parse_unisys_oem((char *)oem_table
);
640 es7000_mps_ret
= ret
;
642 return ret
&& !es7000_apic_is_cluster();
645 static int es7000_mps_oem_check_cluster(struct mpc_table
*mpc
, char *oem
,
648 int ret
= es7000_mps_ret
;
650 return ret
&& es7000_apic_is_cluster();
653 /* We've been warned by a false positive warning.Use __refdata to keep calm. */
654 struct apic __refdata 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 __refdata 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
,