2 * Default generic APIC driver. This handles up to 8 CPUs.
4 * Copyright 2003 Andi Kleen, SuSE Labs.
5 * Subject to the GNU Public License, v.2
7 * Generic x86 APIC driver probe layer.
9 #include <linux/threads.h>
10 #include <linux/cpumask.h>
11 #include <linux/string.h>
12 #include <linux/kernel.h>
13 #include <linux/ctype.h>
14 #include <linux/init.h>
15 #include <linux/errno.h>
16 #include <asm/fixmap.h>
17 #include <asm/mpspec.h>
18 #include <asm/apicdef.h>
19 #include <asm/genapic.h>
20 #include <asm/setup.h>
22 #include <linux/threads.h>
23 #include <linux/cpumask.h>
24 #include <asm/mpspec.h>
25 #include <asm/genapic.h>
26 #include <asm/fixmap.h>
27 #include <asm/apicdef.h>
28 #include <linux/kernel.h>
29 #include <linux/string.h>
30 #include <linux/smp.h>
31 #include <linux/init.h>
32 #include <asm/genapic.h>
35 #include <linux/smp.h>
36 #include <linux/init.h>
37 #include <linux/interrupt.h>
39 #include <asm/arch_hooks.h>
41 #include <asm/setup.h>
43 #include <asm/genapic.h>
45 #ifdef CONFIG_HOTPLUG_CPU
46 #define DEFAULT_SEND_IPI (1)
48 #define DEFAULT_SEND_IPI (0)
51 int no_broadcast
= DEFAULT_SEND_IPI
;
53 #ifdef CONFIG_X86_LOCAL_APIC
55 static void default_vector_allocation_domain(int cpu
, struct cpumask
*retmask
)
58 * Careful. Some cpus do not strictly honor the set of cpus
59 * specified in the interrupt destination when using lowest
60 * priority interrupt delivery mode.
62 * In particular there was a hyperthreading cpu observed to
63 * deliver interrupts to the wrong hyperthread when only one
64 * hyperthread was specified in the interrupt desitination.
66 *retmask
= (cpumask_t
) { { [0] = APIC_ALL_CPUS
} };
69 /* should be called last. */
70 static int probe_default(void)
75 struct genapic apic_default
= {
78 .probe
= probe_default
,
79 .acpi_madt_oem_check
= NULL
,
80 .apic_id_registered
= default_apic_id_registered
,
82 .irq_delivery_mode
= dest_LowestPrio
,
83 /* logical delivery broadcast to all CPUs: */
86 .target_cpus
= default_target_cpus
,
88 .dest_logical
= APIC_DEST_LOGICAL
,
89 .check_apicid_used
= default_check_apicid_used
,
90 .check_apicid_present
= default_check_apicid_present
,
92 .vector_allocation_domain
= default_vector_allocation_domain
,
93 .init_apic_ldr
= default_init_apic_ldr
,
95 .ioapic_phys_id_map
= default_ioapic_phys_id_map
,
96 .setup_apic_routing
= default_setup_apic_routing
,
97 .multi_timer_check
= NULL
,
98 .apicid_to_node
= default_apicid_to_node
,
99 .cpu_to_logical_apicid
= default_cpu_to_logical_apicid
,
100 .cpu_present_to_apicid
= default_cpu_present_to_apicid
,
101 .apicid_to_cpu_present
= default_apicid_to_cpu_present
,
102 .setup_portio_remap
= NULL
,
103 .check_phys_apicid_present
= default_check_phys_apicid_present
,
104 .enable_apic_mode
= NULL
,
105 .phys_pkg_id
= default_phys_pkg_id
,
106 .mps_oem_check
= NULL
,
108 .get_apic_id
= default_get_apic_id
,
110 .apic_id_mask
= 0x0F << 24,
112 .cpu_mask_to_apicid
= default_cpu_mask_to_apicid
,
113 .cpu_mask_to_apicid_and
= default_cpu_mask_to_apicid_and
,
115 .send_IPI_mask
= default_send_IPI_mask_logical
,
116 .send_IPI_mask_allbutself
= default_send_IPI_mask_allbutself_logical
,
117 .send_IPI_allbutself
= default_send_IPI_allbutself
,
118 .send_IPI_all
= default_send_IPI_all
,
119 .send_IPI_self
= default_send_IPI_self
,
122 .trampoline_phys_low
= DEFAULT_TRAMPOLINE_PHYS_LOW
,
123 .trampoline_phys_high
= DEFAULT_TRAMPOLINE_PHYS_HIGH
,
125 .wait_for_init_deassert
= default_wait_for_init_deassert
,
127 .smp_callin_clear_local_apic
= NULL
,
128 .store_NMI_vector
= NULL
,
129 .inquire_remote_apic
= default_inquire_remote_apic
,
131 .read
= native_apic_mem_read
,
132 .write
= native_apic_mem_write
,
133 .icr_read
= native_apic_icr_read
,
134 .icr_write
= native_apic_icr_write
,
135 .wait_icr_idle
= native_apic_wait_icr_idle
,
136 .safe_wait_icr_idle
= native_safe_apic_wait_icr_idle
,
139 extern struct genapic apic_numaq
;
140 extern struct genapic apic_summit
;
141 extern struct genapic apic_bigsmp
;
142 extern struct genapic apic_es7000
;
143 extern struct genapic apic_default
;
145 struct genapic
*apic
= &apic_default
;
147 static struct genapic
*apic_probe
[] __initdata
= {
148 #ifdef CONFIG_X86_NUMAQ
151 #ifdef CONFIG_X86_SUMMIT
154 #ifdef CONFIG_X86_BIGSMP
157 #ifdef CONFIG_X86_ES7000
160 &apic_default
, /* must be last */
164 static int cmdline_apic __initdata
;
165 static int __init
parse_apic(char *arg
)
172 for (i
= 0; apic_probe
[i
]; i
++) {
173 if (!strcmp(apic_probe
[i
]->name
, arg
)) {
174 apic
= apic_probe
[i
];
180 if (x86_quirks
->update_genapic
)
181 x86_quirks
->update_genapic();
183 /* Parsed again by __setup for debug/verbose */
186 early_param("apic", parse_apic
);
188 void __init
generic_bigsmp_probe(void)
190 #ifdef CONFIG_X86_BIGSMP
192 * This routine is used to switch to bigsmp mode when
193 * - There is no apic= option specified by the user
194 * - generic_apic_probe() has chosen apic_default as the sub_arch
195 * - we find more than 8 CPUs in acpi LAPIC listing with xAPIC support
198 if (!cmdline_apic
&& apic
== &apic_default
) {
199 if (apic_bigsmp
.probe()) {
201 if (x86_quirks
->update_genapic
)
202 x86_quirks
->update_genapic();
203 printk(KERN_INFO
"Overriding APIC driver with %s\n",
210 void __init
generic_apic_probe(void)
214 for (i
= 0; apic_probe
[i
]; i
++) {
215 if (apic_probe
[i
]->probe()) {
216 apic
= apic_probe
[i
];
220 /* Not visible without early console */
222 panic("Didn't find an APIC driver");
224 if (x86_quirks
->update_genapic
)
225 x86_quirks
->update_genapic();
227 printk(KERN_INFO
"Using APIC driver %s\n", apic
->name
);
230 /* These functions can switch the APIC even after the initial ->probe() */
233 generic_mps_oem_check(struct mpc_table
*mpc
, char *oem
, char *productid
)
237 for (i
= 0; apic_probe
[i
]; ++i
) {
238 if (!apic_probe
[i
]->mps_oem_check
)
240 if (!apic_probe
[i
]->mps_oem_check(mpc
, oem
, productid
))
244 apic
= apic_probe
[i
];
245 if (x86_quirks
->update_genapic
)
246 x86_quirks
->update_genapic();
247 printk(KERN_INFO
"Switched to APIC driver `%s'.\n",
255 int __init
default_acpi_madt_oem_check(char *oem_id
, char *oem_table_id
)
259 for (i
= 0; apic_probe
[i
]; ++i
) {
260 if (!apic_probe
[i
]->acpi_madt_oem_check
)
262 if (!apic_probe
[i
]->acpi_madt_oem_check(oem_id
, oem_table_id
))
266 apic
= apic_probe
[i
];
267 if (x86_quirks
->update_genapic
)
268 x86_quirks
->update_genapic();
269 printk(KERN_INFO
"Switched to APIC driver `%s'.\n",
277 #endif /* CONFIG_X86_LOCAL_APIC */
280 * pre_intr_init_hook - initialisation prior to setting up interrupt vectors
283 * Perform any necessary interrupt initialisation prior to setting up
284 * the "ordinary" interrupt call gates. For legacy reasons, the ISA
285 * interrupts should be initialised here if the machine emulates a PC
288 void __init
pre_intr_init_hook(void)
290 if (x86_quirks
->arch_pre_intr_init
) {
291 if (x86_quirks
->arch_pre_intr_init())
298 * intr_init_hook - post gate setup interrupt initialisation
301 * Fill in any interrupts that may have been left out by the general
302 * init_IRQ() routine. interrupts having to do with the machine rather
303 * than the devices on the I/O bus (like APIC interrupts in intel MP
304 * systems) are started here.
306 void __init
intr_init_hook(void)
308 if (x86_quirks
->arch_intr_init
) {
309 if (x86_quirks
->arch_intr_init())
315 * pre_setup_arch_hook - hook called prior to any setup_arch() execution
318 * generally used to activate any machine specific identification
319 * routines that may be needed before setup_arch() runs. On Voyager
320 * this is used to get the board revision and type.
322 void __init
pre_setup_arch_hook(void)
327 * trap_init_hook - initialise system specific traps
330 * Called as the final act of trap_init(). Used in VISWS to initialise
331 * the various board specific APIC traps.
333 void __init
trap_init_hook(void)
335 if (x86_quirks
->arch_trap_init
) {
336 if (x86_quirks
->arch_trap_init())
341 static struct irqaction irq0
= {
342 .handler
= timer_interrupt
,
343 .flags
= IRQF_DISABLED
| IRQF_NOBALANCING
| IRQF_IRQPOLL
,
344 .mask
= CPU_MASK_NONE
,
349 * pre_time_init_hook - do any specific initialisations before.
352 void __init
pre_time_init_hook(void)
354 if (x86_quirks
->arch_pre_time_init
)
355 x86_quirks
->arch_pre_time_init();
359 * time_init_hook - do any specific initialisations for the system timer.
362 * Must plug the system timer interrupt source at HZ into the IRQ listed
363 * in irq_vectors.h:TIMER_IRQ
365 void __init
time_init_hook(void)
367 if (x86_quirks
->arch_time_init
) {
369 * A nonzero return code does not mean failure, it means
370 * that the architecture quirk does not want any
371 * generic (timer) setup to be performed after this:
373 if (x86_quirks
->arch_time_init())
377 irq0
.mask
= cpumask_of_cpu(0);
383 * mca_nmi_hook - hook into MCA specific NMI chain
386 * The MCA (Microchannel Architecture) has an NMI chain for NMI sources
387 * along the MCA bus. Use this to hook into that chain if you will need
390 void mca_nmi_hook(void)
393 * If I recall correctly, there's a whole bunch of other things that
394 * we can do to check for NMI problems, but that's all I know about
397 pr_warning("NMI generated from unknown source!\n");
401 static __init
int no_ipi_broadcast(char *str
)
403 get_option(&str
, &no_broadcast
);
404 pr_info("Using %s mode\n",
405 no_broadcast
? "No IPI Broadcast" : "IPI Broadcast");
408 __setup("no_ipi_broadcast=", no_ipi_broadcast
);
410 static int __init
print_ipi_mode(void)
412 pr_info("Using IPI %s mode\n",
413 no_broadcast
? "No-Shortcut" : "Shortcut");
417 late_initcall(print_ipi_mode
);