1 #ifndef _ASM_X86_APIC_H
2 #define _ASM_X86_APIC_H
4 #include <linux/cpumask.h>
5 #include <linux/delay.h>
8 #include <asm/alternative.h>
9 #include <asm/cpufeature.h>
10 #include <asm/processor.h>
11 #include <asm/apicdef.h>
12 #include <asm/atomic.h>
13 #include <asm/fixmap.h>
14 #include <asm/mpspec.h>
15 #include <asm/system.h>
18 #define ARCH_APICTIMER_STOPS_ON_C3 1
24 #define APIC_VERBOSE 1
28 * Define the default level of output to be very little
29 * This can be turned up by using apic=verbose for more
30 * information and apic=debug for _lots_ of information.
31 * apic_verbosity is defined in apic.c
33 #define apic_printk(v, s, a...) do { \
34 if ((v) <= apic_verbosity) \
39 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
40 extern void generic_apic_probe(void);
42 static inline void generic_apic_probe(void)
47 #ifdef CONFIG_X86_LOCAL_APIC
49 extern unsigned int apic_verbosity;
50 extern int local_apic_timer_c2_ok;
52 extern int disable_apic;
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 * Basic functions accessing APICs.
71 #ifdef CONFIG_PARAVIRT
72 #include <asm/paravirt.h>
76 extern int is_vsmp_box(void);
78 static inline int is_vsmp_box(void)
83 extern void xapic_wait_icr_idle(void);
84 extern u32 safe_xapic_wait_icr_idle(void);
85 extern void xapic_icr_write(u32, u32);
86 extern int setup_profiling_timer(unsigned int);
88 static inline void native_apic_mem_write(u32 reg, u32 v)
90 volatile u32 *addr = (volatile u32 *)(APIC_BASE + reg);
92 alternative_io("movl %0, %1", "xchgl %0, %1", X86_FEATURE_11AP,
93 ASM_OUTPUT2("=r" (v), "=m" (*addr)),
94 ASM_OUTPUT2("0" (v), "m" (*addr)));
97 static inline u32 native_apic_mem_read(u32 reg)
99 return *((volatile u32 *)(APIC_BASE + reg));
102 extern void native_apic_wait_icr_idle(void);
103 extern u32 native_safe_apic_wait_icr_idle(void);
104 extern void native_apic_icr_write(u32 low, u32 id);
105 extern u64 native_apic_icr_read(void);
107 extern int x2apic_mode;
109 #ifdef CONFIG_X86_X2APIC
111 * Make previous memory operations globally visible before
112 * sending the IPI through x2apic wrmsr. We need a serializing instruction or
115 static inline void x2apic_wrmsr_fence(void)
117 asm volatile("mfence" : : : "memory");
120 static inline void native_apic_msr_write(u32 reg, u32 v)
122 if (reg == APIC_DFR || reg == APIC_ID || reg == APIC_LDR ||
126 wrmsr(APIC_BASE_MSR + (reg >> 4), v, 0);
129 static inline u32 native_apic_msr_read(u32 reg)
136 rdmsr(APIC_BASE_MSR + (reg >> 4), low, high);
140 static inline void native_x2apic_wait_icr_idle(void)
142 /* no need to wait for icr idle in x2apic */
146 static inline u32 native_safe_x2apic_wait_icr_idle(void)
148 /* no need to wait for icr idle in x2apic */
152 static inline void native_x2apic_icr_write(u32 low, u32 id)
154 wrmsrl(APIC_BASE_MSR + (APIC_ICR >> 4), ((__u64) id) << 32 | low);
157 static inline u64 native_x2apic_icr_read(void)
161 rdmsrl(APIC_BASE_MSR + (APIC_ICR >> 4), val);
165 extern int x2apic_phys;
166 extern void check_x2apic(void);
167 extern void enable_x2apic(void);
168 extern void x2apic_icr_write(u32 low, u32 id);
169 static inline int x2apic_enabled(void)
176 rdmsr(MSR_IA32_APICBASE, msr, msr2);
177 if (msr & X2APIC_ENABLE)
182 #define x2apic_supported() (cpu_has_x2apic)
183 static inline void x2apic_force_phys(void)
188 static inline void check_x2apic(void)
191 static inline void enable_x2apic(void)
194 static inline int x2apic_enabled(void)
198 static inline void x2apic_force_phys(void)
202 #define x2apic_preenabled 0
203 #define x2apic_supported() 0
206 extern void enable_IR_x2apic(void);
208 extern int get_physical_broadcast(void);
210 extern void apic_disable(void);
211 extern int lapic_get_maxlvt(void);
212 extern void clear_local_APIC(void);
213 extern void connect_bsp_APIC(void);
214 extern void disconnect_bsp_APIC(int virt_wire_setup);
215 extern void disable_local_APIC(void);
216 extern void lapic_shutdown(void);
217 extern int verify_local_APIC(void);
218 extern void cache_APIC_registers(void);
219 extern void sync_Arb_IDs(void);
220 extern void init_bsp_APIC(void);
221 extern void setup_local_APIC(void);
222 extern void end_local_APIC_setup(void);
223 extern void init_apic_mappings(void);
224 extern void setup_boot_APIC_clock(void);
225 extern void setup_secondary_APIC_clock(void);
226 extern int APIC_init_uniprocessor(void);
227 extern void enable_NMI_through_LVT0(void);
230 * On 32bit this is mach-xxx local
233 extern void early_init_lapic_mapping(void);
234 extern int apic_is_clustered_box(void);
236 static inline int apic_is_clustered_box(void)
242 extern u8 setup_APIC_eilvt_mce(u8 vector, u8 msg_type, u8 mask);
243 extern u8 setup_APIC_eilvt_ibs(u8 vector, u8 msg_type, u8 mask);
246 #else /* !CONFIG_X86_LOCAL_APIC */
247 static inline void lapic_shutdown(void) { }
248 #define local_apic_timer_c2_ok 1
249 static inline void init_apic_mappings(void) { }
250 static inline void disable_local_APIC(void) { }
251 static inline void apic_disable(void) { }
252 # define setup_boot_APIC_clock x86_init_noop
253 # define setup_secondary_APIC_clock x86_init_noop
254 #endif /* !CONFIG_X86_LOCAL_APIC */
257 #define SET_APIC_ID(x) (apic->set_apic_id(x))
263 * Copyright 2004 James Cleverdon, IBM.
264 * Subject to the GNU Public License, v.2
266 * Generic APIC sub-arch data struct.
268 * Hacked for x86-64 by James Cleverdon from i386 architecture code by
269 * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and
276 int (*acpi_madt_oem_check)(char *oem_id, char *oem_table_id);
277 int (*apic_id_registered)(void);
279 u32 irq_delivery_mode;
282 const struct cpumask *(*target_cpus)(void);
287 unsigned long (*check_apicid_used)(physid_mask_t bitmap, int apicid);
288 unsigned long (*check_apicid_present)(int apicid);
290 void (*vector_allocation_domain)(int cpu, struct cpumask *retmask);
291 void (*init_apic_ldr)(void);
293 physid_mask_t (*ioapic_phys_id_map)(physid_mask_t map);
295 void (*setup_apic_routing)(void);
296 int (*multi_timer_check)(int apic, int irq);
297 int (*apicid_to_node)(int logical_apicid);
298 int (*cpu_to_logical_apicid)(int cpu);
299 int (*cpu_present_to_apicid)(int mps_cpu);
300 physid_mask_t (*apicid_to_cpu_present)(int phys_apicid);
301 void (*setup_portio_remap)(void);
302 int (*check_phys_apicid_present)(int phys_apicid);
303 void (*enable_apic_mode)(void);
304 int (*phys_pkg_id)(int cpuid_apic, int index_msb);
307 * When one of the next two hooks returns 1 the apic
308 * is switched to this. Essentially they are additional
311 int (*mps_oem_check)(struct mpc_table *mpc, char *oem, char *productid);
313 unsigned int (*get_apic_id)(unsigned long x);
314 unsigned long (*set_apic_id)(unsigned int id);
315 unsigned long apic_id_mask;
317 unsigned int (*cpu_mask_to_apicid)(const struct cpumask *cpumask);
318 unsigned int (*cpu_mask_to_apicid_and)(const struct cpumask *cpumask,
319 const struct cpumask *andmask);
322 void (*send_IPI_mask)(const struct cpumask *mask, int vector);
323 void (*send_IPI_mask_allbutself)(const struct cpumask *mask,
325 void (*send_IPI_allbutself)(int vector);
326 void (*send_IPI_all)(int vector);
327 void (*send_IPI_self)(int vector);
329 /* wakeup_secondary_cpu */
330 int (*wakeup_secondary_cpu)(int apicid, unsigned long start_eip);
332 int trampoline_phys_low;
333 int trampoline_phys_high;
335 void (*wait_for_init_deassert)(atomic_t *deassert);
336 void (*smp_callin_clear_local_apic)(void);
337 void (*inquire_remote_apic)(int apicid);
340 u32 (*read)(u32 reg);
341 void (*write)(u32 reg, u32 v);
342 u64 (*icr_read)(void);
343 void (*icr_write)(u32 low, u32 high);
344 void (*wait_icr_idle)(void);
345 u32 (*safe_wait_icr_idle)(void);
349 * Pointer to the local APIC driver in use on this system (there's
350 * always just one such driver in use - the kernel decides via an
351 * early probing process which one it picks - and then sticks to it):
353 extern struct apic *apic;
356 * APIC functionality to boot other CPUs - only used on SMP:
359 extern atomic_t init_deasserted;
360 extern int wakeup_secondary_cpu_via_nmi(int apicid, unsigned long start_eip);
363 static inline u32 apic_read(u32 reg)
365 return apic->read(reg);
368 static inline void apic_write(u32 reg, u32 val)
370 apic->write(reg, val);
373 static inline u64 apic_icr_read(void)
375 return apic->icr_read();
378 static inline void apic_icr_write(u32 low, u32 high)
380 apic->icr_write(low, high);
383 static inline void apic_wait_icr_idle(void)
385 apic->wait_icr_idle();
388 static inline u32 safe_apic_wait_icr_idle(void)
390 return apic->safe_wait_icr_idle();
394 static inline void ack_APIC_irq(void)
396 #ifdef CONFIG_X86_LOCAL_APIC
398 * ack_APIC_irq() actually gets compiled as a single instruction
402 /* Docs say use 0 for future compatibility */
403 apic_write(APIC_EOI, 0);
407 static inline unsigned default_get_apic_id(unsigned long x)
409 unsigned int ver = GET_APIC_VERSION(apic_read(APIC_LVR));
411 if (APIC_XAPIC(ver) || boot_cpu_has(X86_FEATURE_EXTD_APICID))
412 return (x >> 24) & 0xFF;
414 return (x >> 24) & 0x0F;
418 * Warm reset vector default position:
420 #define DEFAULT_TRAMPOLINE_PHYS_LOW 0x467
421 #define DEFAULT_TRAMPOLINE_PHYS_HIGH 0x469
424 extern struct apic apic_flat;
425 extern struct apic apic_physflat;
426 extern struct apic apic_x2apic_cluster;
427 extern struct apic apic_x2apic_phys;
428 extern int default_acpi_madt_oem_check(char *, char *);
430 extern void apic_send_IPI_self(int vector);
432 extern struct apic apic_x2apic_uv_x;
433 DECLARE_PER_CPU(int, x2apic_extra_bits);
435 extern int default_cpu_present_to_apicid(int mps_cpu);
436 extern int default_check_phys_apicid_present(int phys_apicid);
439 static inline void default_wait_for_init_deassert(atomic_t *deassert)
441 while (!atomic_read(deassert))
446 extern void generic_bigsmp_probe(void);
449 #ifdef CONFIG_X86_LOCAL_APIC
453 #define APIC_DFR_VALUE (APIC_DFR_FLAT)
455 static inline const struct cpumask *default_target_cpus(void)
458 return cpu_online_mask;
460 return cpumask_of(0);
464 DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid);
467 static inline unsigned int read_apic_id(void)
471 reg = apic_read(APIC_ID);
473 return apic->get_apic_id(reg);
476 extern void default_setup_apic_routing(void);
480 extern struct apic apic_default;
483 * Set up the logical destination ID.
485 * Intel recommends to set DFR, LDR and TPR before enabling
486 * an APIC. See e.g. "AP-388 82489DX User's Manual" (Intel
487 * document number 292116). So here it goes...
489 extern void default_init_apic_ldr(void);
491 static inline int default_apic_id_registered(void)
493 return physid_isset(read_apic_id(), phys_cpu_present_map);
496 static inline int default_phys_pkg_id(int cpuid_apic, int index_msb)
498 return cpuid_apic >> index_msb;
501 extern int default_apicid_to_node(int logical_apicid);
505 static inline unsigned int
506 default_cpu_mask_to_apicid(const struct cpumask *cpumask)
508 return cpumask_bits(cpumask)[0] & APIC_ALL_CPUS;
511 static inline unsigned int
512 default_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
513 const struct cpumask *andmask)
515 unsigned long mask1 = cpumask_bits(cpumask)[0];
516 unsigned long mask2 = cpumask_bits(andmask)[0];
517 unsigned long mask3 = cpumask_bits(cpu_online_mask)[0];
519 return (unsigned int)(mask1 & mask2 & mask3);
522 static inline unsigned long default_check_apicid_used(physid_mask_t bitmap, int apicid)
524 return physid_isset(apicid, bitmap);
527 static inline unsigned long default_check_apicid_present(int bit)
529 return physid_isset(bit, phys_cpu_present_map);
532 static inline physid_mask_t default_ioapic_phys_id_map(physid_mask_t phys_map)
537 /* Mapping from cpu number to logical apicid */
538 static inline int default_cpu_to_logical_apicid(int cpu)
543 static inline int __default_cpu_present_to_apicid(int mps_cpu)
545 if (mps_cpu < nr_cpu_ids && cpu_present(mps_cpu))
546 return (int)per_cpu(x86_bios_cpu_apicid, mps_cpu);
552 __default_check_phys_apicid_present(int phys_apicid)
554 return physid_isset(phys_apicid, phys_cpu_present_map);
558 static inline int default_cpu_present_to_apicid(int mps_cpu)
560 return __default_cpu_present_to_apicid(mps_cpu);
564 default_check_phys_apicid_present(int phys_apicid)
566 return __default_check_phys_apicid_present(phys_apicid);
569 extern int default_cpu_present_to_apicid(int mps_cpu);
570 extern int default_check_phys_apicid_present(int phys_apicid);
573 static inline physid_mask_t default_apicid_to_cpu_present(int phys_apicid)
575 return physid_mask_of_physid(phys_apicid);
578 #endif /* CONFIG_X86_LOCAL_APIC */
581 extern u8 cpu_2_logical_apicid[NR_CPUS];
584 #endif /* _ASM_X86_APIC_H */