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 u32 native_apic_msr_read(u32 reg)
148 rdmsrl(APIC_BASE_MSR + (reg >> 4), msr);
152 static inline void native_x2apic_wait_icr_idle(void)
154 /* no need to wait for icr idle in x2apic */
158 static inline u32 native_safe_x2apic_wait_icr_idle(void)
160 /* no need to wait for icr idle in x2apic */
164 static inline void native_x2apic_icr_write(u32 low, u32 id)
166 wrmsrl(APIC_BASE_MSR + (APIC_ICR >> 4), ((__u64) id) << 32 | low);
169 static inline u64 native_x2apic_icr_read(void)
173 rdmsrl(APIC_BASE_MSR + (APIC_ICR >> 4), val);
177 extern int x2apic_phys;
178 extern int x2apic_preenabled;
179 extern void check_x2apic(void);
180 extern void enable_x2apic(void);
181 extern void x2apic_icr_write(u32 low, u32 id);
182 static inline int x2apic_enabled(void)
189 rdmsrl(MSR_IA32_APICBASE, msr);
190 if (msr & X2APIC_ENABLE)
195 #define x2apic_supported() (cpu_has_x2apic)
196 static inline void x2apic_force_phys(void)
201 static inline void disable_x2apic(void)
204 static inline void check_x2apic(void)
207 static inline void enable_x2apic(void)
210 static inline int x2apic_enabled(void)
214 static inline void x2apic_force_phys(void)
219 #define x2apic_preenabled 0
220 #define x2apic_supported() 0
223 extern void enable_IR_x2apic(void);
225 extern int get_physical_broadcast(void);
227 extern int lapic_get_maxlvt(void);
228 extern void clear_local_APIC(void);
229 extern void connect_bsp_APIC(void);
230 extern void disconnect_bsp_APIC(int virt_wire_setup);
231 extern void disable_local_APIC(void);
232 extern void lapic_shutdown(void);
233 extern int verify_local_APIC(void);
234 extern void sync_Arb_IDs(void);
235 extern void init_bsp_APIC(void);
236 extern void setup_local_APIC(void);
237 extern void end_local_APIC_setup(void);
238 extern void bsp_end_local_APIC_setup(void);
239 extern void init_apic_mappings(void);
240 void register_lapic_address(unsigned long address);
241 extern void setup_boot_APIC_clock(void);
242 extern void setup_secondary_APIC_clock(void);
243 extern int APIC_init_uniprocessor(void);
244 extern int apic_force_enable(unsigned long addr);
247 * On 32bit this is mach-xxx local
250 extern int apic_is_clustered_box(void);
252 static inline int apic_is_clustered_box(void)
258 extern int setup_APIC_eilvt(u8 lvt_off, u8 vector, u8 msg_type, u8 mask);
260 #else /* !CONFIG_X86_LOCAL_APIC */
261 static inline void lapic_shutdown(void) { }
262 #define local_apic_timer_c2_ok 1
263 static inline void init_apic_mappings(void) { }
264 static inline void disable_local_APIC(void) { }
265 # define setup_boot_APIC_clock x86_init_noop
266 # define setup_secondary_APIC_clock x86_init_noop
267 #endif /* !CONFIG_X86_LOCAL_APIC */
270 #define SET_APIC_ID(x) (apic->set_apic_id(x))
276 * Copyright 2004 James Cleverdon, IBM.
277 * Subject to the GNU Public License, v.2
279 * Generic APIC sub-arch data struct.
281 * Hacked for x86-64 by James Cleverdon from i386 architecture code by
282 * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and
289 int (*acpi_madt_oem_check)(char *oem_id, char *oem_table_id);
290 int (*apic_id_valid)(int apicid);
291 int (*apic_id_registered)(void);
293 u32 irq_delivery_mode;
296 const struct cpumask *(*target_cpus)(void);
301 unsigned long (*check_apicid_used)(physid_mask_t *map, int apicid);
302 unsigned long (*check_apicid_present)(int apicid);
304 void (*vector_allocation_domain)(int cpu, struct cpumask *retmask);
305 void (*init_apic_ldr)(void);
307 void (*ioapic_phys_id_map)(physid_mask_t *phys_map, physid_mask_t *retmap);
309 void (*setup_apic_routing)(void);
310 int (*multi_timer_check)(int apic, int irq);
311 int (*cpu_present_to_apicid)(int mps_cpu);
312 void (*apicid_to_cpu_present)(int phys_apicid, physid_mask_t *retmap);
313 void (*setup_portio_remap)(void);
314 int (*check_phys_apicid_present)(int phys_apicid);
315 void (*enable_apic_mode)(void);
316 int (*phys_pkg_id)(int cpuid_apic, int index_msb);
319 * When one of the next two hooks returns 1 the apic
320 * is switched to this. Essentially they are additional
323 int (*mps_oem_check)(struct mpc_table *mpc, char *oem, char *productid);
325 unsigned int (*get_apic_id)(unsigned long x);
326 unsigned long (*set_apic_id)(unsigned int id);
327 unsigned long apic_id_mask;
329 unsigned int (*cpu_mask_to_apicid)(const struct cpumask *cpumask);
330 unsigned int (*cpu_mask_to_apicid_and)(const struct cpumask *cpumask,
331 const struct cpumask *andmask);
334 void (*send_IPI_mask)(const struct cpumask *mask, int vector);
335 void (*send_IPI_mask_allbutself)(const struct cpumask *mask,
337 void (*send_IPI_allbutself)(int vector);
338 void (*send_IPI_all)(int vector);
339 void (*send_IPI_self)(int vector);
341 /* wakeup_secondary_cpu */
342 int (*wakeup_secondary_cpu)(int apicid, unsigned long start_eip);
344 int trampoline_phys_low;
345 int trampoline_phys_high;
347 void (*wait_for_init_deassert)(atomic_t *deassert);
348 void (*smp_callin_clear_local_apic)(void);
349 void (*inquire_remote_apic)(int apicid);
352 u32 (*read)(u32 reg);
353 void (*write)(u32 reg, u32 v);
354 u64 (*icr_read)(void);
355 void (*icr_write)(u32 low, u32 high);
356 void (*wait_icr_idle)(void);
357 u32 (*safe_wait_icr_idle)(void);
361 * Called very early during boot from get_smp_config(). It should
362 * return the logical apicid. x86_[bios]_cpu_to_apicid is
363 * initialized before this function is called.
365 * If logical apicid can't be determined that early, the function
366 * may return BAD_APICID. Logical apicid will be configured after
367 * init_apic_ldr() while bringing up CPUs. Note that NUMA affinity
368 * won't be applied properly during early boot in this case.
370 int (*x86_32_early_logical_apicid)(int cpu);
373 * Optional method called from setup_local_APIC() after logical
374 * apicid is guaranteed to be known to initialize apicid -> node
375 * mapping if NUMA initialization hasn't done so already. Don't
378 int (*x86_32_numa_cpu_node)(int cpu);
383 * Pointer to the local APIC driver in use on this system (there's
384 * always just one such driver in use - the kernel decides via an
385 * early probing process which one it picks - and then sticks to it):
387 extern struct apic *apic;
390 * APIC drivers are probed based on how they are listed in the .apicdrivers
391 * section. So the order is important and enforced by the ordering
392 * of different apic driver files in the Makefile.
394 * For the files having two apic drivers, we use apic_drivers()
395 * to enforce the order with in them.
397 #define apic_driver(sym) \
398 static struct apic *__apicdrivers_##sym __used \
399 __aligned(sizeof(struct apic *)) \
400 __section(.apicdrivers) = { &sym }
402 #define apic_drivers(sym1, sym2) \
403 static struct apic *__apicdrivers_##sym1##sym2[2] __used \
404 __aligned(sizeof(struct apic *)) \
405 __section(.apicdrivers) = { &sym1, &sym2 }
407 extern struct apic *__apicdrivers[], *__apicdrivers_end[];
410 * APIC functionality to boot other CPUs - only used on SMP:
413 extern atomic_t init_deasserted;
414 extern int wakeup_secondary_cpu_via_nmi(int apicid, unsigned long start_eip);
417 #ifdef CONFIG_X86_LOCAL_APIC
419 static inline u32 apic_read(u32 reg)
421 return apic->read(reg);
424 static inline void apic_write(u32 reg, u32 val)
426 apic->write(reg, val);
429 static inline u64 apic_icr_read(void)
431 return apic->icr_read();
434 static inline void apic_icr_write(u32 low, u32 high)
436 apic->icr_write(low, high);
439 static inline void apic_wait_icr_idle(void)
441 apic->wait_icr_idle();
444 static inline u32 safe_apic_wait_icr_idle(void)
446 return apic->safe_wait_icr_idle();
449 #else /* CONFIG_X86_LOCAL_APIC */
451 static inline u32 apic_read(u32 reg) { return 0; }
452 static inline void apic_write(u32 reg, u32 val) { }
453 static inline u64 apic_icr_read(void) { return 0; }
454 static inline void apic_icr_write(u32 low, u32 high) { }
455 static inline void apic_wait_icr_idle(void) { }
456 static inline u32 safe_apic_wait_icr_idle(void) { return 0; }
458 #endif /* CONFIG_X86_LOCAL_APIC */
460 static inline void ack_APIC_irq(void)
463 * ack_APIC_irq() actually gets compiled as a single instruction
467 /* Docs say use 0 for future compatibility */
468 apic_write(APIC_EOI, 0);
471 static inline unsigned default_get_apic_id(unsigned long x)
473 unsigned int ver = GET_APIC_VERSION(apic_read(APIC_LVR));
475 if (APIC_XAPIC(ver) || boot_cpu_has(X86_FEATURE_EXTD_APICID))
476 return (x >> 24) & 0xFF;
478 return (x >> 24) & 0x0F;
482 * Warm reset vector default position:
484 #define DEFAULT_TRAMPOLINE_PHYS_LOW 0x467
485 #define DEFAULT_TRAMPOLINE_PHYS_HIGH 0x469
488 extern int default_acpi_madt_oem_check(char *, char *);
490 extern void apic_send_IPI_self(int vector);
492 DECLARE_PER_CPU(int, x2apic_extra_bits);
494 extern int default_cpu_present_to_apicid(int mps_cpu);
495 extern int default_check_phys_apicid_present(int phys_apicid);
498 static inline void default_wait_for_init_deassert(atomic_t *deassert)
500 while (!atomic_read(deassert))
505 extern void generic_bigsmp_probe(void);
508 #ifdef CONFIG_X86_LOCAL_APIC
512 #define APIC_DFR_VALUE (APIC_DFR_FLAT)
514 static inline const struct cpumask *default_target_cpus(void)
517 return cpu_online_mask;
519 return cpumask_of(0);
523 DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid);
526 static inline unsigned int read_apic_id(void)
530 reg = apic_read(APIC_ID);
532 return apic->get_apic_id(reg);
535 static inline int default_apic_id_valid(int apicid)
537 return (apicid < 255);
540 extern void default_setup_apic_routing(void);
542 extern struct apic apic_noop;
546 static inline int noop_x86_32_early_logical_apicid(int cpu)
552 * Set up the logical destination ID.
554 * Intel recommends to set DFR, LDR and TPR before enabling
555 * an APIC. See e.g. "AP-388 82489DX User's Manual" (Intel
556 * document number 292116). So here it goes...
558 extern void default_init_apic_ldr(void);
560 static inline int default_apic_id_registered(void)
562 return physid_isset(read_apic_id(), phys_cpu_present_map);
565 static inline int default_phys_pkg_id(int cpuid_apic, int index_msb)
567 return cpuid_apic >> index_msb;
572 static inline unsigned int
573 default_cpu_mask_to_apicid(const struct cpumask *cpumask)
575 return cpumask_bits(cpumask)[0] & APIC_ALL_CPUS;
578 static inline unsigned int
579 default_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
580 const struct cpumask *andmask)
582 unsigned long mask1 = cpumask_bits(cpumask)[0];
583 unsigned long mask2 = cpumask_bits(andmask)[0];
584 unsigned long mask3 = cpumask_bits(cpu_online_mask)[0];
586 return (unsigned int)(mask1 & mask2 & mask3);
589 static inline unsigned long default_check_apicid_used(physid_mask_t *map, int apicid)
591 return physid_isset(apicid, *map);
594 static inline unsigned long default_check_apicid_present(int bit)
596 return physid_isset(bit, phys_cpu_present_map);
599 static inline void default_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
604 static inline int __default_cpu_present_to_apicid(int mps_cpu)
606 if (mps_cpu < nr_cpu_ids && cpu_present(mps_cpu))
607 return (int)per_cpu(x86_bios_cpu_apicid, mps_cpu);
613 __default_check_phys_apicid_present(int phys_apicid)
615 return physid_isset(phys_apicid, phys_cpu_present_map);
619 static inline int default_cpu_present_to_apicid(int mps_cpu)
621 return __default_cpu_present_to_apicid(mps_cpu);
625 default_check_phys_apicid_present(int phys_apicid)
627 return __default_check_phys_apicid_present(phys_apicid);
630 extern int default_cpu_present_to_apicid(int mps_cpu);
631 extern int default_check_phys_apicid_present(int phys_apicid);
634 #endif /* CONFIG_X86_LOCAL_APIC */
636 #endif /* _ASM_X86_APIC_H */