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>
16 #define ARCH_APICTIMER_STOPS_ON_C3 1
22 #define APIC_VERBOSE 1
26 * Define the default level of output to be very little
27 * This can be turned up by using apic=verbose for more
28 * information and apic=debug for _lots_ of information.
29 * apic_verbosity is defined in apic.c
31 #define apic_printk(v, s, a...) do { \
32 if ((v) <= apic_verbosity) \
37 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
38 extern void generic_apic_probe(void);
40 static inline void generic_apic_probe(void)
45 #ifdef CONFIG_X86_LOCAL_APIC
47 extern unsigned int apic_verbosity;
48 extern int local_apic_timer_c2_ok;
50 extern int disable_apic;
51 extern unsigned int lapic_timer_frequency;
54 extern void __inquire_remote_apic(int apicid);
55 #else /* CONFIG_SMP */
56 static inline void __inquire_remote_apic(int apicid)
59 #endif /* CONFIG_SMP */
61 static inline void default_inquire_remote_apic(int apicid)
63 if (apic_verbosity >= APIC_DEBUG)
64 __inquire_remote_apic(apicid);
68 * With 82489DX we can't rely on apic feature bit
69 * retrieved via cpuid but still have to deal with
70 * such an apic chip so we assume that SMP configuration
71 * is found from MP table (64bit case uses ACPI mostly
72 * which set smp presence flag as well so we are safe
73 * to use this helper too).
75 static inline bool apic_from_smp_config(void)
77 return smp_found_config && !disable_apic;
81 * Basic functions accessing APICs.
83 #ifdef CONFIG_PARAVIRT
84 #include <asm/paravirt.h>
88 extern int is_vsmp_box(void);
90 static inline int is_vsmp_box(void)
95 extern void xapic_wait_icr_idle(void);
96 extern u32 safe_xapic_wait_icr_idle(void);
97 extern void xapic_icr_write(u32, u32);
98 extern int setup_profiling_timer(unsigned int);
100 static inline void native_apic_mem_write(u32 reg, u32 v)
102 volatile u32 *addr = (volatile u32 *)(APIC_BASE + reg);
104 alternative_io("movl %0, %1", "xchgl %0, %1", X86_FEATURE_11AP,
105 ASM_OUTPUT2("=r" (v), "=m" (*addr)),
106 ASM_OUTPUT2("0" (v), "m" (*addr)));
109 static inline u32 native_apic_mem_read(u32 reg)
111 return *((volatile u32 *)(APIC_BASE + reg));
114 extern void native_apic_wait_icr_idle(void);
115 extern u32 native_safe_apic_wait_icr_idle(void);
116 extern void native_apic_icr_write(u32 low, u32 id);
117 extern u64 native_apic_icr_read(void);
119 extern int x2apic_mode;
121 #ifdef CONFIG_X86_X2APIC
123 * Make previous memory operations globally visible before
124 * sending the IPI through x2apic wrmsr. We need a serializing instruction or
127 static inline void x2apic_wrmsr_fence(void)
129 asm volatile("mfence" : : : "memory");
132 static inline void native_apic_msr_write(u32 reg, u32 v)
134 if (reg == APIC_DFR || reg == APIC_ID || reg == APIC_LDR ||
138 wrmsr(APIC_BASE_MSR + (reg >> 4), v, 0);
141 static inline void native_apic_msr_eoi_write(u32 reg, u32 v)
143 wrmsr(APIC_BASE_MSR + (APIC_EOI >> 4), APIC_EOI_ACK, 0);
146 static inline u32 native_apic_msr_read(u32 reg)
153 rdmsrl(APIC_BASE_MSR + (reg >> 4), msr);
157 static inline void native_x2apic_wait_icr_idle(void)
159 /* no need to wait for icr idle in x2apic */
163 static inline u32 native_safe_x2apic_wait_icr_idle(void)
165 /* no need to wait for icr idle in x2apic */
169 static inline void native_x2apic_icr_write(u32 low, u32 id)
171 wrmsrl(APIC_BASE_MSR + (APIC_ICR >> 4), ((__u64) id) << 32 | low);
174 static inline u64 native_x2apic_icr_read(void)
178 rdmsrl(APIC_BASE_MSR + (APIC_ICR >> 4), val);
182 extern int x2apic_phys;
183 extern int x2apic_preenabled;
184 extern void check_x2apic(void);
185 extern void enable_x2apic(void);
186 extern void x2apic_icr_write(u32 low, u32 id);
187 static inline int x2apic_enabled(void)
194 rdmsrl(MSR_IA32_APICBASE, msr);
195 if (msr & X2APIC_ENABLE)
200 #define x2apic_supported() (cpu_has_x2apic)
201 static inline void x2apic_force_phys(void)
206 static inline void disable_x2apic(void)
209 static inline void check_x2apic(void)
212 static inline void enable_x2apic(void)
215 static inline int x2apic_enabled(void)
219 static inline void x2apic_force_phys(void)
224 #define x2apic_preenabled 0
225 #define x2apic_supported() 0
228 extern void enable_IR_x2apic(void);
230 extern int get_physical_broadcast(void);
232 extern int lapic_get_maxlvt(void);
233 extern void clear_local_APIC(void);
234 extern void connect_bsp_APIC(void);
235 extern void disconnect_bsp_APIC(int virt_wire_setup);
236 extern void disable_local_APIC(void);
237 extern void lapic_shutdown(void);
238 extern int verify_local_APIC(void);
239 extern void sync_Arb_IDs(void);
240 extern void init_bsp_APIC(void);
241 extern void setup_local_APIC(void);
242 extern void end_local_APIC_setup(void);
243 extern void bsp_end_local_APIC_setup(void);
244 extern void init_apic_mappings(void);
245 void register_lapic_address(unsigned long address);
246 extern void setup_boot_APIC_clock(void);
247 extern void setup_secondary_APIC_clock(void);
248 extern int APIC_init_uniprocessor(void);
249 extern int apic_force_enable(unsigned long addr);
252 * On 32bit this is mach-xxx local
255 extern int apic_is_clustered_box(void);
257 static inline int apic_is_clustered_box(void)
263 extern int setup_APIC_eilvt(u8 lvt_off, u8 vector, u8 msg_type, u8 mask);
265 #else /* !CONFIG_X86_LOCAL_APIC */
266 static inline void lapic_shutdown(void) { }
267 #define local_apic_timer_c2_ok 1
268 static inline void init_apic_mappings(void) { }
269 static inline void disable_local_APIC(void) { }
270 # define setup_boot_APIC_clock x86_init_noop
271 # define setup_secondary_APIC_clock x86_init_noop
272 #endif /* !CONFIG_X86_LOCAL_APIC */
275 #define SET_APIC_ID(x) (apic->set_apic_id(x))
281 * Copyright 2004 James Cleverdon, IBM.
282 * Subject to the GNU Public License, v.2
284 * Generic APIC sub-arch data struct.
286 * Hacked for x86-64 by James Cleverdon from i386 architecture code by
287 * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and
294 int (*acpi_madt_oem_check)(char *oem_id, char *oem_table_id);
295 int (*apic_id_valid)(int apicid);
296 int (*apic_id_registered)(void);
298 u32 irq_delivery_mode;
301 const struct cpumask *(*target_cpus)(void);
306 unsigned long (*check_apicid_used)(physid_mask_t *map, int apicid);
307 unsigned long (*check_apicid_present)(int apicid);
309 void (*vector_allocation_domain)(int cpu, struct cpumask *retmask,
310 const struct cpumask *mask);
311 void (*init_apic_ldr)(void);
313 void (*ioapic_phys_id_map)(physid_mask_t *phys_map, physid_mask_t *retmap);
315 void (*setup_apic_routing)(void);
316 int (*multi_timer_check)(int apic, int irq);
317 int (*cpu_present_to_apicid)(int mps_cpu);
318 void (*apicid_to_cpu_present)(int phys_apicid, physid_mask_t *retmap);
319 void (*setup_portio_remap)(void);
320 int (*check_phys_apicid_present)(int phys_apicid);
321 void (*enable_apic_mode)(void);
322 int (*phys_pkg_id)(int cpuid_apic, int index_msb);
325 * When one of the next two hooks returns 1 the apic
326 * is switched to this. Essentially they are additional
329 int (*mps_oem_check)(struct mpc_table *mpc, char *oem, char *productid);
331 unsigned int (*get_apic_id)(unsigned long x);
332 unsigned long (*set_apic_id)(unsigned int id);
333 unsigned long apic_id_mask;
335 int (*cpu_mask_to_apicid_and)(const struct cpumask *cpumask,
336 const struct cpumask *andmask,
337 unsigned int *apicid);
340 void (*send_IPI_mask)(const struct cpumask *mask, int vector);
341 void (*send_IPI_mask_allbutself)(const struct cpumask *mask,
343 void (*send_IPI_allbutself)(int vector);
344 void (*send_IPI_all)(int vector);
345 void (*send_IPI_self)(int vector);
347 /* wakeup_secondary_cpu */
348 int (*wakeup_secondary_cpu)(int apicid, unsigned long start_eip);
350 int trampoline_phys_low;
351 int trampoline_phys_high;
353 void (*wait_for_init_deassert)(atomic_t *deassert);
354 void (*smp_callin_clear_local_apic)(void);
355 void (*inquire_remote_apic)(int apicid);
358 u32 (*read)(u32 reg);
359 void (*write)(u32 reg, u32 v);
361 * ->eoi_write() has the same signature as ->write().
363 * Drivers can support both ->eoi_write() and ->write() by passing the same
364 * callback value. Kernel can override ->eoi_write() and fall back
367 void (*eoi_write)(u32 reg, u32 v);
368 u64 (*icr_read)(void);
369 void (*icr_write)(u32 low, u32 high);
370 void (*wait_icr_idle)(void);
371 u32 (*safe_wait_icr_idle)(void);
375 * Called very early during boot from get_smp_config(). It should
376 * return the logical apicid. x86_[bios]_cpu_to_apicid is
377 * initialized before this function is called.
379 * If logical apicid can't be determined that early, the function
380 * may return BAD_APICID. Logical apicid will be configured after
381 * init_apic_ldr() while bringing up CPUs. Note that NUMA affinity
382 * won't be applied properly during early boot in this case.
384 int (*x86_32_early_logical_apicid)(int cpu);
387 * Optional method called from setup_local_APIC() after logical
388 * apicid is guaranteed to be known to initialize apicid -> node
389 * mapping if NUMA initialization hasn't done so already. Don't
392 int (*x86_32_numa_cpu_node)(int cpu);
397 * Pointer to the local APIC driver in use on this system (there's
398 * always just one such driver in use - the kernel decides via an
399 * early probing process which one it picks - and then sticks to it):
401 extern struct apic *apic;
404 * APIC drivers are probed based on how they are listed in the .apicdrivers
405 * section. So the order is important and enforced by the ordering
406 * of different apic driver files in the Makefile.
408 * For the files having two apic drivers, we use apic_drivers()
409 * to enforce the order with in them.
411 #define apic_driver(sym) \
412 static const struct apic *__apicdrivers_##sym __used \
413 __aligned(sizeof(struct apic *)) \
414 __section(.apicdrivers) = { &sym }
416 #define apic_drivers(sym1, sym2) \
417 static struct apic *__apicdrivers_##sym1##sym2[2] __used \
418 __aligned(sizeof(struct apic *)) \
419 __section(.apicdrivers) = { &sym1, &sym2 }
421 extern struct apic *__apicdrivers[], *__apicdrivers_end[];
424 * APIC functionality to boot other CPUs - only used on SMP:
427 extern atomic_t init_deasserted;
428 extern int wakeup_secondary_cpu_via_nmi(int apicid, unsigned long start_eip);
431 #ifdef CONFIG_X86_LOCAL_APIC
433 static inline u32 apic_read(u32 reg)
435 return apic->read(reg);
438 static inline void apic_write(u32 reg, u32 val)
440 apic->write(reg, val);
443 static inline void apic_eoi(void)
445 apic->eoi_write(APIC_EOI, APIC_EOI_ACK);
448 static inline u64 apic_icr_read(void)
450 return apic->icr_read();
453 static inline void apic_icr_write(u32 low, u32 high)
455 apic->icr_write(low, high);
458 static inline void apic_wait_icr_idle(void)
460 apic->wait_icr_idle();
463 static inline u32 safe_apic_wait_icr_idle(void)
465 return apic->safe_wait_icr_idle();
468 extern void __init apic_set_eoi_write(void (*eoi_write)(u32 reg, u32 v));
470 #else /* CONFIG_X86_LOCAL_APIC */
472 static inline u32 apic_read(u32 reg) { return 0; }
473 static inline void apic_write(u32 reg, u32 val) { }
474 static inline void apic_eoi(void) { }
475 static inline u64 apic_icr_read(void) { return 0; }
476 static inline void apic_icr_write(u32 low, u32 high) { }
477 static inline void apic_wait_icr_idle(void) { }
478 static inline u32 safe_apic_wait_icr_idle(void) { return 0; }
479 static inline void apic_set_eoi_write(void (*eoi_write)(u32 reg, u32 v)) {}
481 #endif /* CONFIG_X86_LOCAL_APIC */
483 static inline void ack_APIC_irq(void)
486 * ack_APIC_irq() actually gets compiled as a single instruction
492 static inline unsigned default_get_apic_id(unsigned long x)
494 unsigned int ver = GET_APIC_VERSION(apic_read(APIC_LVR));
496 if (APIC_XAPIC(ver) || boot_cpu_has(X86_FEATURE_EXTD_APICID))
497 return (x >> 24) & 0xFF;
499 return (x >> 24) & 0x0F;
503 * Warm reset vector default position:
505 #define DEFAULT_TRAMPOLINE_PHYS_LOW 0x467
506 #define DEFAULT_TRAMPOLINE_PHYS_HIGH 0x469
509 extern int default_acpi_madt_oem_check(char *, char *);
511 extern void apic_send_IPI_self(int vector);
513 DECLARE_PER_CPU(int, x2apic_extra_bits);
515 extern int default_cpu_present_to_apicid(int mps_cpu);
516 extern int default_check_phys_apicid_present(int phys_apicid);
519 static inline void default_wait_for_init_deassert(atomic_t *deassert)
521 while (!atomic_read(deassert))
526 extern void generic_bigsmp_probe(void);
529 #ifdef CONFIG_X86_LOCAL_APIC
533 #define APIC_DFR_VALUE (APIC_DFR_FLAT)
535 static inline const struct cpumask *default_target_cpus(void)
538 return cpu_online_mask;
540 return cpumask_of(0);
544 static inline const struct cpumask *online_target_cpus(void)
546 return cpu_online_mask;
549 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid);
552 static inline unsigned int read_apic_id(void)
556 reg = apic_read(APIC_ID);
558 return apic->get_apic_id(reg);
561 static inline int default_apic_id_valid(int apicid)
563 return (apicid < 255);
566 extern void default_setup_apic_routing(void);
568 extern struct apic apic_noop;
572 static inline int noop_x86_32_early_logical_apicid(int cpu)
578 * Set up the logical destination ID.
580 * Intel recommends to set DFR, LDR and TPR before enabling
581 * an APIC. See e.g. "AP-388 82489DX User's Manual" (Intel
582 * document number 292116). So here it goes...
584 extern void default_init_apic_ldr(void);
586 static inline int default_apic_id_registered(void)
588 return physid_isset(read_apic_id(), phys_cpu_present_map);
591 static inline int default_phys_pkg_id(int cpuid_apic, int index_msb)
593 return cpuid_apic >> index_msb;
599 flat_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
600 const struct cpumask *andmask,
601 unsigned int *apicid)
603 unsigned long cpu_mask = cpumask_bits(cpumask)[0] &
604 cpumask_bits(andmask)[0] &
605 cpumask_bits(cpu_online_mask)[0] &
608 if (likely(cpu_mask)) {
609 *apicid = (unsigned int)cpu_mask;
617 default_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
618 const struct cpumask *andmask,
619 unsigned int *apicid);
622 flat_vector_allocation_domain(int cpu, struct cpumask *retmask,
623 const struct cpumask *mask)
625 /* Careful. Some cpus do not strictly honor the set of cpus
626 * specified in the interrupt destination when using lowest
627 * priority interrupt delivery mode.
629 * In particular there was a hyperthreading cpu observed to
630 * deliver interrupts to the wrong hyperthread when only one
631 * hyperthread was specified in the interrupt desitination.
633 cpumask_clear(retmask);
634 cpumask_bits(retmask)[0] = APIC_ALL_CPUS;
638 default_vector_allocation_domain(int cpu, struct cpumask *retmask,
639 const struct cpumask *mask)
641 cpumask_copy(retmask, cpumask_of(cpu));
644 static inline unsigned long default_check_apicid_used(physid_mask_t *map, int apicid)
646 return physid_isset(apicid, *map);
649 static inline unsigned long default_check_apicid_present(int bit)
651 return physid_isset(bit, phys_cpu_present_map);
654 static inline void default_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
659 static inline int __default_cpu_present_to_apicid(int mps_cpu)
661 if (mps_cpu < nr_cpu_ids && cpu_present(mps_cpu))
662 return (int)per_cpu(x86_bios_cpu_apicid, mps_cpu);
668 __default_check_phys_apicid_present(int phys_apicid)
670 return physid_isset(phys_apicid, phys_cpu_present_map);
674 static inline int default_cpu_present_to_apicid(int mps_cpu)
676 return __default_cpu_present_to_apicid(mps_cpu);
680 default_check_phys_apicid_present(int phys_apicid)
682 return __default_check_phys_apicid_present(phys_apicid);
685 extern int default_cpu_present_to_apicid(int mps_cpu);
686 extern int default_check_phys_apicid_present(int phys_apicid);
689 #endif /* CONFIG_X86_LOCAL_APIC */
691 #endif /* _ASM_X86_APIC_H */