1 #ifndef _ASM_X86_APIC_H
2 #define _ASM_X86_APIC_H
4 #include <linux/cpumask.h>
7 #include <asm/alternative.h>
8 #include <asm/cpufeature.h>
9 #include <asm/processor.h>
10 #include <asm/apicdef.h>
11 #include <linux/atomic.h>
12 #include <asm/fixmap.h>
13 #include <asm/mpspec.h>
17 #define ARCH_APICTIMER_STOPS_ON_C3 1
23 #define APIC_VERBOSE 1
27 * Define the default level of output to be very little
28 * This can be turned up by using apic=verbose for more
29 * information and apic=debug for _lots_ of information.
30 * apic_verbosity is defined in apic.c
32 #define apic_printk(v, s, a...) do { \
33 if ((v) <= apic_verbosity) \
38 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
39 extern void generic_apic_probe(void);
41 static inline void generic_apic_probe(void)
46 #ifdef CONFIG_X86_LOCAL_APIC
48 extern unsigned int apic_verbosity
;
49 extern int local_apic_timer_c2_ok
;
51 extern int disable_apic
;
52 extern unsigned int lapic_timer_frequency
;
55 extern void __inquire_remote_apic(int apicid
);
56 #else /* CONFIG_SMP */
57 static inline void __inquire_remote_apic(int apicid
)
60 #endif /* CONFIG_SMP */
62 static inline void default_inquire_remote_apic(int apicid
)
64 if (apic_verbosity
>= APIC_DEBUG
)
65 __inquire_remote_apic(apicid
);
69 * With 82489DX we can't rely on apic feature bit
70 * retrieved via cpuid but still have to deal with
71 * such an apic chip so we assume that SMP configuration
72 * is found from MP table (64bit case uses ACPI mostly
73 * which set smp presence flag as well so we are safe
74 * to use this helper too).
76 static inline bool apic_from_smp_config(void)
78 return smp_found_config
&& !disable_apic
;
82 * Basic functions accessing APICs.
84 #ifdef CONFIG_PARAVIRT
85 #include <asm/paravirt.h>
89 extern int is_vsmp_box(void);
91 static inline int is_vsmp_box(void)
96 extern void xapic_wait_icr_idle(void);
97 extern u32
safe_xapic_wait_icr_idle(void);
98 extern void xapic_icr_write(u32
, u32
);
99 extern int setup_profiling_timer(unsigned int);
101 static inline void native_apic_mem_write(u32 reg
, u32 v
)
103 volatile u32
*addr
= (volatile u32
*)(APIC_BASE
+ reg
);
105 alternative_io("movl %0, %1", "xchgl %0, %1", X86_FEATURE_11AP
,
106 ASM_OUTPUT2("=r" (v
), "=m" (*addr
)),
107 ASM_OUTPUT2("0" (v
), "m" (*addr
)));
110 static inline u32
native_apic_mem_read(u32 reg
)
112 return *((volatile u32
*)(APIC_BASE
+ reg
));
115 extern void native_apic_wait_icr_idle(void);
116 extern u32
native_safe_apic_wait_icr_idle(void);
117 extern void native_apic_icr_write(u32 low
, u32 id
);
118 extern u64
native_apic_icr_read(void);
120 extern int x2apic_mode
;
122 #ifdef CONFIG_X86_X2APIC
124 * Make previous memory operations globally visible before
125 * sending the IPI through x2apic wrmsr. We need a serializing instruction or
128 static inline void x2apic_wrmsr_fence(void)
130 asm volatile("mfence" : : : "memory");
133 static inline void native_apic_msr_write(u32 reg
, u32 v
)
135 if (reg
== APIC_DFR
|| reg
== APIC_ID
|| reg
== APIC_LDR
||
139 wrmsr(APIC_BASE_MSR
+ (reg
>> 4), v
, 0);
142 static inline void native_apic_msr_eoi_write(u32 reg
, u32 v
)
144 wrmsr(APIC_BASE_MSR
+ (APIC_EOI
>> 4), APIC_EOI_ACK
, 0);
147 static inline u32
native_apic_msr_read(u32 reg
)
154 rdmsrl(APIC_BASE_MSR
+ (reg
>> 4), msr
);
158 static inline void native_x2apic_wait_icr_idle(void)
160 /* no need to wait for icr idle in x2apic */
164 static inline u32
native_safe_x2apic_wait_icr_idle(void)
166 /* no need to wait for icr idle in x2apic */
170 static inline void native_x2apic_icr_write(u32 low
, u32 id
)
172 wrmsrl(APIC_BASE_MSR
+ (APIC_ICR
>> 4), ((__u64
) id
) << 32 | low
);
175 static inline u64
native_x2apic_icr_read(void)
179 rdmsrl(APIC_BASE_MSR
+ (APIC_ICR
>> 4), val
);
183 extern int x2apic_phys
;
184 extern int x2apic_preenabled
;
185 extern void check_x2apic(void);
186 extern void enable_x2apic(void);
187 extern void x2apic_icr_write(u32 low
, u32 id
);
188 static inline int x2apic_enabled(void)
195 rdmsrl(MSR_IA32_APICBASE
, msr
);
196 if (msr
& X2APIC_ENABLE
)
201 #define x2apic_supported() (cpu_has_x2apic)
202 static inline void x2apic_force_phys(void)
207 static inline void disable_x2apic(void)
210 static inline void check_x2apic(void)
213 static inline void enable_x2apic(void)
216 static inline int x2apic_enabled(void)
220 static inline void x2apic_force_phys(void)
225 #define x2apic_preenabled 0
226 #define x2apic_supported() 0
229 extern void enable_IR_x2apic(void);
231 extern int get_physical_broadcast(void);
233 extern int lapic_get_maxlvt(void);
234 extern void clear_local_APIC(void);
235 extern void connect_bsp_APIC(void);
236 extern void disconnect_bsp_APIC(int virt_wire_setup
);
237 extern void disable_local_APIC(void);
238 extern void lapic_shutdown(void);
239 extern int verify_local_APIC(void);
240 extern void sync_Arb_IDs(void);
241 extern void init_bsp_APIC(void);
242 extern void setup_local_APIC(void);
243 extern void end_local_APIC_setup(void);
244 extern void bsp_end_local_APIC_setup(void);
245 extern void init_apic_mappings(void);
246 void register_lapic_address(unsigned long address
);
247 extern void setup_boot_APIC_clock(void);
248 extern void setup_secondary_APIC_clock(void);
249 extern int APIC_init_uniprocessor(void);
250 extern int apic_force_enable(unsigned long addr
);
253 * On 32bit this is mach-xxx local
256 extern int apic_is_clustered_box(void);
258 static inline int apic_is_clustered_box(void)
264 extern int setup_APIC_eilvt(u8 lvt_off
, u8 vector
, u8 msg_type
, u8 mask
);
266 #else /* !CONFIG_X86_LOCAL_APIC */
267 static inline void lapic_shutdown(void) { }
268 #define local_apic_timer_c2_ok 1
269 static inline void init_apic_mappings(void) { }
270 static inline void disable_local_APIC(void) { }
271 # define setup_boot_APIC_clock x86_init_noop
272 # define setup_secondary_APIC_clock x86_init_noop
273 #endif /* !CONFIG_X86_LOCAL_APIC */
276 #define SET_APIC_ID(x) (apic->set_apic_id(x))
282 * Copyright 2004 James Cleverdon, IBM.
283 * Subject to the GNU Public License, v.2
285 * Generic APIC sub-arch data struct.
287 * Hacked for x86-64 by James Cleverdon from i386 architecture code by
288 * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and
295 int (*acpi_madt_oem_check
)(char *oem_id
, char *oem_table_id
);
296 int (*apic_id_valid
)(int apicid
);
297 int (*apic_id_registered
)(void);
299 u32 irq_delivery_mode
;
302 const struct cpumask
*(*target_cpus
)(void);
307 unsigned long (*check_apicid_used
)(physid_mask_t
*map
, int apicid
);
308 unsigned long (*check_apicid_present
)(int apicid
);
310 void (*vector_allocation_domain
)(int cpu
, struct cpumask
*retmask
,
311 const struct cpumask
*mask
);
312 void (*init_apic_ldr
)(void);
314 void (*ioapic_phys_id_map
)(physid_mask_t
*phys_map
, physid_mask_t
*retmap
);
316 void (*setup_apic_routing
)(void);
317 int (*multi_timer_check
)(int apic
, int irq
);
318 int (*cpu_present_to_apicid
)(int mps_cpu
);
319 void (*apicid_to_cpu_present
)(int phys_apicid
, physid_mask_t
*retmap
);
320 void (*setup_portio_remap
)(void);
321 int (*check_phys_apicid_present
)(int phys_apicid
);
322 void (*enable_apic_mode
)(void);
323 int (*phys_pkg_id
)(int cpuid_apic
, int index_msb
);
326 * When one of the next two hooks returns 1 the apic
327 * is switched to this. Essentially they are additional
330 int (*mps_oem_check
)(struct mpc_table
*mpc
, char *oem
, char *productid
);
332 unsigned int (*get_apic_id
)(unsigned long x
);
333 unsigned long (*set_apic_id
)(unsigned int id
);
334 unsigned long apic_id_mask
;
336 int (*cpu_mask_to_apicid_and
)(const struct cpumask
*cpumask
,
337 const struct cpumask
*andmask
,
338 unsigned int *apicid
);
341 void (*send_IPI_mask
)(const struct cpumask
*mask
, int vector
);
342 void (*send_IPI_mask_allbutself
)(const struct cpumask
*mask
,
344 void (*send_IPI_allbutself
)(int vector
);
345 void (*send_IPI_all
)(int vector
);
346 void (*send_IPI_self
)(int vector
);
348 /* wakeup_secondary_cpu */
349 int (*wakeup_secondary_cpu
)(int apicid
, unsigned long start_eip
);
351 int trampoline_phys_low
;
352 int trampoline_phys_high
;
354 void (*wait_for_init_deassert
)(atomic_t
*deassert
);
355 void (*smp_callin_clear_local_apic
)(void);
356 void (*inquire_remote_apic
)(int apicid
);
359 u32 (*read
)(u32 reg
);
360 void (*write
)(u32 reg
, u32 v
);
362 * ->eoi_write() has the same signature as ->write().
364 * Drivers can support both ->eoi_write() and ->write() by passing the same
365 * callback value. Kernel can override ->eoi_write() and fall back
368 void (*eoi_write
)(u32 reg
, u32 v
);
369 u64 (*icr_read
)(void);
370 void (*icr_write
)(u32 low
, u32 high
);
371 void (*wait_icr_idle
)(void);
372 u32 (*safe_wait_icr_idle
)(void);
376 * Called very early during boot from get_smp_config(). It should
377 * return the logical apicid. x86_[bios]_cpu_to_apicid is
378 * initialized before this function is called.
380 * If logical apicid can't be determined that early, the function
381 * may return BAD_APICID. Logical apicid will be configured after
382 * init_apic_ldr() while bringing up CPUs. Note that NUMA affinity
383 * won't be applied properly during early boot in this case.
385 int (*x86_32_early_logical_apicid
)(int cpu
);
388 * Optional method called from setup_local_APIC() after logical
389 * apicid is guaranteed to be known to initialize apicid -> node
390 * mapping if NUMA initialization hasn't done so already. Don't
393 int (*x86_32_numa_cpu_node
)(int cpu
);
398 * Pointer to the local APIC driver in use on this system (there's
399 * always just one such driver in use - the kernel decides via an
400 * early probing process which one it picks - and then sticks to it):
402 extern struct apic
*apic
;
405 * APIC drivers are probed based on how they are listed in the .apicdrivers
406 * section. So the order is important and enforced by the ordering
407 * of different apic driver files in the Makefile.
409 * For the files having two apic drivers, we use apic_drivers()
410 * to enforce the order with in them.
412 #define apic_driver(sym) \
413 static const struct apic *__apicdrivers_##sym __used \
414 __aligned(sizeof(struct apic *)) \
415 __section(.apicdrivers) = { &sym }
417 #define apic_drivers(sym1, sym2) \
418 static struct apic *__apicdrivers_##sym1##sym2[2] __used \
419 __aligned(sizeof(struct apic *)) \
420 __section(.apicdrivers) = { &sym1, &sym2 }
422 extern struct apic
*__apicdrivers
[], *__apicdrivers_end
[];
425 * APIC functionality to boot other CPUs - only used on SMP:
428 extern atomic_t init_deasserted
;
429 extern int wakeup_secondary_cpu_via_nmi(int apicid
, unsigned long start_eip
);
432 #ifdef CONFIG_X86_LOCAL_APIC
434 static inline u32
apic_read(u32 reg
)
436 return apic
->read(reg
);
439 static inline void apic_write(u32 reg
, u32 val
)
441 apic
->write(reg
, val
);
444 static inline void apic_eoi(void)
446 apic
->eoi_write(APIC_EOI
, APIC_EOI_ACK
);
449 static inline u64
apic_icr_read(void)
451 return apic
->icr_read();
454 static inline void apic_icr_write(u32 low
, u32 high
)
456 apic
->icr_write(low
, high
);
459 static inline void apic_wait_icr_idle(void)
461 apic
->wait_icr_idle();
464 static inline u32
safe_apic_wait_icr_idle(void)
466 return apic
->safe_wait_icr_idle();
469 extern void __init
apic_set_eoi_write(void (*eoi_write
)(u32 reg
, u32 v
));
471 #else /* CONFIG_X86_LOCAL_APIC */
473 static inline u32
apic_read(u32 reg
) { return 0; }
474 static inline void apic_write(u32 reg
, u32 val
) { }
475 static inline void apic_eoi(void) { }
476 static inline u64
apic_icr_read(void) { return 0; }
477 static inline void apic_icr_write(u32 low
, u32 high
) { }
478 static inline void apic_wait_icr_idle(void) { }
479 static inline u32
safe_apic_wait_icr_idle(void) { return 0; }
480 static inline void apic_set_eoi_write(void (*eoi_write
)(u32 reg
, u32 v
)) {}
482 #endif /* CONFIG_X86_LOCAL_APIC */
484 static inline void ack_APIC_irq(void)
487 * ack_APIC_irq() actually gets compiled as a single instruction
493 static inline unsigned default_get_apic_id(unsigned long x
)
495 unsigned int ver
= GET_APIC_VERSION(apic_read(APIC_LVR
));
497 if (APIC_XAPIC(ver
) || boot_cpu_has(X86_FEATURE_EXTD_APICID
))
498 return (x
>> 24) & 0xFF;
500 return (x
>> 24) & 0x0F;
504 * Warm reset vector default position:
506 #define DEFAULT_TRAMPOLINE_PHYS_LOW 0x467
507 #define DEFAULT_TRAMPOLINE_PHYS_HIGH 0x469
510 extern int default_acpi_madt_oem_check(char *, char *);
512 extern void apic_send_IPI_self(int vector
);
514 DECLARE_PER_CPU(int, x2apic_extra_bits
);
516 extern int default_cpu_present_to_apicid(int mps_cpu
);
517 extern int default_check_phys_apicid_present(int phys_apicid
);
520 static inline void default_wait_for_init_deassert(atomic_t
*deassert
)
522 while (!atomic_read(deassert
))
527 extern void generic_bigsmp_probe(void);
530 #ifdef CONFIG_X86_LOCAL_APIC
534 #define APIC_DFR_VALUE (APIC_DFR_FLAT)
536 static inline const struct cpumask
*default_target_cpus(void)
539 return cpu_online_mask
;
541 return cpumask_of(0);
545 static inline const struct cpumask
*online_target_cpus(void)
547 return cpu_online_mask
;
550 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16
, x86_bios_cpu_apicid
);
553 static inline unsigned int read_apic_id(void)
557 reg
= apic_read(APIC_ID
);
559 return apic
->get_apic_id(reg
);
562 static inline int default_apic_id_valid(int apicid
)
564 return (apicid
< 255);
567 extern void default_setup_apic_routing(void);
569 extern struct apic apic_noop
;
573 static inline int noop_x86_32_early_logical_apicid(int cpu
)
579 * Set up the logical destination ID.
581 * Intel recommends to set DFR, LDR and TPR before enabling
582 * an APIC. See e.g. "AP-388 82489DX User's Manual" (Intel
583 * document number 292116). So here it goes...
585 extern void default_init_apic_ldr(void);
587 static inline int default_apic_id_registered(void)
589 return physid_isset(read_apic_id(), phys_cpu_present_map
);
592 static inline int default_phys_pkg_id(int cpuid_apic
, int index_msb
)
594 return cpuid_apic
>> index_msb
;
600 flat_cpu_mask_to_apicid_and(const struct cpumask
*cpumask
,
601 const struct cpumask
*andmask
,
602 unsigned int *apicid
)
604 unsigned long cpu_mask
= cpumask_bits(cpumask
)[0] &
605 cpumask_bits(andmask
)[0] &
606 cpumask_bits(cpu_online_mask
)[0] &
609 if (likely(cpu_mask
)) {
610 *apicid
= (unsigned int)cpu_mask
;
618 default_cpu_mask_to_apicid_and(const struct cpumask
*cpumask
,
619 const struct cpumask
*andmask
,
620 unsigned int *apicid
);
623 flat_vector_allocation_domain(int cpu
, struct cpumask
*retmask
,
624 const struct cpumask
*mask
)
626 /* Careful. Some cpus do not strictly honor the set of cpus
627 * specified in the interrupt destination when using lowest
628 * priority interrupt delivery mode.
630 * In particular there was a hyperthreading cpu observed to
631 * deliver interrupts to the wrong hyperthread when only one
632 * hyperthread was specified in the interrupt desitination.
634 cpumask_clear(retmask
);
635 cpumask_bits(retmask
)[0] = APIC_ALL_CPUS
;
639 default_vector_allocation_domain(int cpu
, struct cpumask
*retmask
,
640 const struct cpumask
*mask
)
642 cpumask_copy(retmask
, cpumask_of(cpu
));
645 static inline unsigned long default_check_apicid_used(physid_mask_t
*map
, int apicid
)
647 return physid_isset(apicid
, *map
);
650 static inline unsigned long default_check_apicid_present(int bit
)
652 return physid_isset(bit
, phys_cpu_present_map
);
655 static inline void default_ioapic_phys_id_map(physid_mask_t
*phys_map
, physid_mask_t
*retmap
)
660 static inline int __default_cpu_present_to_apicid(int mps_cpu
)
662 if (mps_cpu
< nr_cpu_ids
&& cpu_present(mps_cpu
))
663 return (int)per_cpu(x86_bios_cpu_apicid
, mps_cpu
);
669 __default_check_phys_apicid_present(int phys_apicid
)
671 return physid_isset(phys_apicid
, phys_cpu_present_map
);
675 static inline int default_cpu_present_to_apicid(int mps_cpu
)
677 return __default_cpu_present_to_apicid(mps_cpu
);
681 default_check_phys_apicid_present(int phys_apicid
)
683 return __default_check_phys_apicid_present(phys_apicid
);
686 extern int default_cpu_present_to_apicid(int mps_cpu
);
687 extern int default_check_phys_apicid_present(int phys_apicid
);
690 #endif /* CONFIG_X86_LOCAL_APIC */
691 extern void irq_enter(void);
692 extern void irq_exit(void);
694 static inline void entering_irq(void)
700 static inline void entering_ack_irq(void)
706 static inline void exiting_irq(void)
711 static inline void exiting_ack_irq(void)
714 /* Ack only at the end to avoid potential reentry */
718 extern void ioapic_zap_locks(void);
720 #endif /* _ASM_X86_APIC_H */