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>
74 #define setup_boot_clock setup_boot_APIC_clock
75 #define setup_secondary_clock setup_secondary_APIC_clock
79 extern int is_vsmp_box(void);
81 static inline int is_vsmp_box(void)
86 extern void xapic_wait_icr_idle(void);
87 extern u32 safe_xapic_wait_icr_idle(void);
88 extern void xapic_icr_write(u32, u32);
89 extern int setup_profiling_timer(unsigned int);
91 static inline void native_apic_mem_write(u32 reg, u32 v)
93 volatile u32 *addr = (volatile u32 *)(APIC_BASE + reg);
95 alternative_io("movl %0, %1", "xchgl %0, %1", X86_FEATURE_11AP,
96 ASM_OUTPUT2("=r" (v), "=m" (*addr)),
97 ASM_OUTPUT2("0" (v), "m" (*addr)));
100 static inline u32 native_apic_mem_read(u32 reg)
102 return *((volatile u32 *)(APIC_BASE + reg));
105 extern void native_apic_wait_icr_idle(void);
106 extern u32 native_safe_apic_wait_icr_idle(void);
107 extern void native_apic_icr_write(u32 low, u32 id);
108 extern u64 native_apic_icr_read(void);
110 extern int x2apic_mode;
112 #ifdef CONFIG_X86_X2APIC
114 * Make previous memory operations globally visible before
115 * sending the IPI through x2apic wrmsr. We need a serializing instruction or
118 static inline void x2apic_wrmsr_fence(void)
120 asm volatile("mfence" : : : "memory");
123 static inline void native_apic_msr_write(u32 reg, u32 v)
125 if (reg == APIC_DFR || reg == APIC_ID || reg == APIC_LDR ||
129 wrmsr(APIC_BASE_MSR + (reg >> 4), v, 0);
132 static inline u32 native_apic_msr_read(u32 reg)
139 rdmsr(APIC_BASE_MSR + (reg >> 4), low, high);
143 static inline void native_x2apic_wait_icr_idle(void)
145 /* no need to wait for icr idle in x2apic */
149 static inline u32 native_safe_x2apic_wait_icr_idle(void)
151 /* no need to wait for icr idle in x2apic */
155 static inline void native_x2apic_icr_write(u32 low, u32 id)
157 wrmsrl(APIC_BASE_MSR + (APIC_ICR >> 4), ((__u64) id) << 32 | low);
160 static inline u64 native_x2apic_icr_read(void)
164 rdmsrl(APIC_BASE_MSR + (APIC_ICR >> 4), val);
168 extern int x2apic_phys;
169 extern void check_x2apic(void);
170 extern void enable_x2apic(void);
171 extern void x2apic_icr_write(u32 low, u32 id);
172 static inline int x2apic_enabled(void)
179 rdmsr(MSR_IA32_APICBASE, msr, msr2);
180 if (msr & X2APIC_ENABLE)
185 #define x2apic_supported() (cpu_has_x2apic)
187 static inline void check_x2apic(void)
190 static inline void enable_x2apic(void)
193 static inline int x2apic_enabled(void)
198 #define x2apic_preenabled 0
199 #define x2apic_supported() 0
202 extern void enable_IR_x2apic(void);
204 extern int get_physical_broadcast(void);
206 extern void apic_disable(void);
207 extern int lapic_get_maxlvt(void);
208 extern void clear_local_APIC(void);
209 extern void connect_bsp_APIC(void);
210 extern void disconnect_bsp_APIC(int virt_wire_setup);
211 extern void disable_local_APIC(void);
212 extern void lapic_shutdown(void);
213 extern int verify_local_APIC(void);
214 extern void cache_APIC_registers(void);
215 extern void sync_Arb_IDs(void);
216 extern void init_bsp_APIC(void);
217 extern void setup_local_APIC(void);
218 extern void end_local_APIC_setup(void);
219 extern void init_apic_mappings(void);
220 extern void setup_boot_APIC_clock(void);
221 extern void setup_secondary_APIC_clock(void);
222 extern int APIC_init_uniprocessor(void);
223 extern void enable_NMI_through_LVT0(void);
226 * On 32bit this is mach-xxx local
229 extern void early_init_lapic_mapping(void);
230 extern int apic_is_clustered_box(void);
232 static inline int apic_is_clustered_box(void)
238 extern u8 setup_APIC_eilvt_mce(u8 vector, u8 msg_type, u8 mask);
239 extern u8 setup_APIC_eilvt_ibs(u8 vector, u8 msg_type, u8 mask);
242 #else /* !CONFIG_X86_LOCAL_APIC */
243 static inline void lapic_shutdown(void) { }
244 #define local_apic_timer_c2_ok 1
245 static inline void init_apic_mappings(void) { }
246 static inline void disable_local_APIC(void) { }
247 static inline void apic_disable(void) { }
248 #endif /* !CONFIG_X86_LOCAL_APIC */
251 #define SET_APIC_ID(x) (apic->set_apic_id(x))
257 * Copyright 2004 James Cleverdon, IBM.
258 * Subject to the GNU Public License, v.2
260 * Generic APIC sub-arch data struct.
262 * Hacked for x86-64 by James Cleverdon from i386 architecture code by
263 * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and
270 int (*acpi_madt_oem_check)(char *oem_id, char *oem_table_id);
271 int (*apic_id_registered)(void);
273 u32 irq_delivery_mode;
276 const struct cpumask *(*target_cpus)(void);
281 unsigned long (*check_apicid_used)(physid_mask_t bitmap, int apicid);
282 unsigned long (*check_apicid_present)(int apicid);
284 void (*vector_allocation_domain)(int cpu, struct cpumask *retmask);
285 void (*init_apic_ldr)(void);
287 physid_mask_t (*ioapic_phys_id_map)(physid_mask_t map);
289 void (*setup_apic_routing)(void);
290 int (*multi_timer_check)(int apic, int irq);
291 int (*apicid_to_node)(int logical_apicid);
292 int (*cpu_to_logical_apicid)(int cpu);
293 int (*cpu_present_to_apicid)(int mps_cpu);
294 physid_mask_t (*apicid_to_cpu_present)(int phys_apicid);
295 void (*setup_portio_remap)(void);
296 int (*check_phys_apicid_present)(int boot_cpu_physical_apicid);
297 void (*enable_apic_mode)(void);
298 int (*phys_pkg_id)(int cpuid_apic, int index_msb);
301 * When one of the next two hooks returns 1 the apic
302 * is switched to this. Essentially they are additional
305 int (*mps_oem_check)(struct mpc_table *mpc, char *oem, char *productid);
307 unsigned int (*get_apic_id)(unsigned long x);
308 unsigned long (*set_apic_id)(unsigned int id);
309 unsigned long apic_id_mask;
311 unsigned int (*cpu_mask_to_apicid)(const struct cpumask *cpumask);
312 unsigned int (*cpu_mask_to_apicid_and)(const struct cpumask *cpumask,
313 const struct cpumask *andmask);
316 void (*send_IPI_mask)(const struct cpumask *mask, int vector);
317 void (*send_IPI_mask_allbutself)(const struct cpumask *mask,
319 void (*send_IPI_allbutself)(int vector);
320 void (*send_IPI_all)(int vector);
321 void (*send_IPI_self)(int vector);
323 /* wakeup_secondary_cpu */
324 int (*wakeup_secondary_cpu)(int apicid, unsigned long start_eip);
326 int trampoline_phys_low;
327 int trampoline_phys_high;
329 void (*wait_for_init_deassert)(atomic_t *deassert);
330 void (*smp_callin_clear_local_apic)(void);
331 void (*inquire_remote_apic)(int apicid);
334 u32 (*read)(u32 reg);
335 void (*write)(u32 reg, u32 v);
336 u64 (*icr_read)(void);
337 void (*icr_write)(u32 low, u32 high);
338 void (*wait_icr_idle)(void);
339 u32 (*safe_wait_icr_idle)(void);
343 * Pointer to the local APIC driver in use on this system (there's
344 * always just one such driver in use - the kernel decides via an
345 * early probing process which one it picks - and then sticks to it):
347 extern struct apic *apic;
350 * APIC functionality to boot other CPUs - only used on SMP:
353 extern atomic_t init_deasserted;
354 extern int wakeup_secondary_cpu_via_nmi(int apicid, unsigned long start_eip);
357 static inline u32 apic_read(u32 reg)
359 return apic->read(reg);
362 static inline void apic_write(u32 reg, u32 val)
364 apic->write(reg, val);
367 static inline u64 apic_icr_read(void)
369 return apic->icr_read();
372 static inline void apic_icr_write(u32 low, u32 high)
374 apic->icr_write(low, high);
377 static inline void apic_wait_icr_idle(void)
379 apic->wait_icr_idle();
382 static inline u32 safe_apic_wait_icr_idle(void)
384 return apic->safe_wait_icr_idle();
388 static inline void ack_APIC_irq(void)
390 #ifdef CONFIG_X86_LOCAL_APIC
392 * ack_APIC_irq() actually gets compiled as a single instruction
396 /* Docs say use 0 for future compatibility */
397 apic_write(APIC_EOI, 0);
401 static inline unsigned default_get_apic_id(unsigned long x)
403 unsigned int ver = GET_APIC_VERSION(apic_read(APIC_LVR));
405 if (APIC_XAPIC(ver) || boot_cpu_has(X86_FEATURE_EXTD_APICID))
406 return (x >> 24) & 0xFF;
408 return (x >> 24) & 0x0F;
412 * Warm reset vector default position:
414 #define DEFAULT_TRAMPOLINE_PHYS_LOW 0x467
415 #define DEFAULT_TRAMPOLINE_PHYS_HIGH 0x469
418 extern struct apic apic_flat;
419 extern struct apic apic_physflat;
420 extern struct apic apic_x2apic_cluster;
421 extern struct apic apic_x2apic_phys;
422 extern int default_acpi_madt_oem_check(char *, char *);
424 extern void apic_send_IPI_self(int vector);
426 extern struct apic apic_x2apic_uv_x;
427 DECLARE_PER_CPU(int, x2apic_extra_bits);
429 extern int default_cpu_present_to_apicid(int mps_cpu);
430 extern int default_check_phys_apicid_present(int boot_cpu_physical_apicid);
433 static inline void default_wait_for_init_deassert(atomic_t *deassert)
435 while (!atomic_read(deassert))
440 extern void generic_bigsmp_probe(void);
443 #ifdef CONFIG_X86_LOCAL_APIC
447 #define APIC_DFR_VALUE (APIC_DFR_FLAT)
449 static inline const struct cpumask *default_target_cpus(void)
452 return cpu_online_mask;
454 return cpumask_of(0);
458 DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid);
461 static inline unsigned int read_apic_id(void)
465 reg = apic_read(APIC_ID);
467 return apic->get_apic_id(reg);
470 extern void default_setup_apic_routing(void);
474 extern struct apic apic_default;
477 * Set up the logical destination ID.
479 * Intel recommends to set DFR, LDR and TPR before enabling
480 * an APIC. See e.g. "AP-388 82489DX User's Manual" (Intel
481 * document number 292116). So here it goes...
483 extern void default_init_apic_ldr(void);
485 static inline int default_apic_id_registered(void)
487 return physid_isset(read_apic_id(), phys_cpu_present_map);
490 static inline int default_phys_pkg_id(int cpuid_apic, int index_msb)
492 return cpuid_apic >> index_msb;
495 extern int default_apicid_to_node(int logical_apicid);
499 static inline unsigned int
500 default_cpu_mask_to_apicid(const struct cpumask *cpumask)
502 return cpumask_bits(cpumask)[0] & APIC_ALL_CPUS;
505 static inline unsigned int
506 default_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
507 const struct cpumask *andmask)
509 unsigned long mask1 = cpumask_bits(cpumask)[0];
510 unsigned long mask2 = cpumask_bits(andmask)[0];
511 unsigned long mask3 = cpumask_bits(cpu_online_mask)[0];
513 return (unsigned int)(mask1 & mask2 & mask3);
516 static inline unsigned long default_check_apicid_used(physid_mask_t bitmap, int apicid)
518 return physid_isset(apicid, bitmap);
521 static inline unsigned long default_check_apicid_present(int bit)
523 return physid_isset(bit, phys_cpu_present_map);
526 static inline physid_mask_t default_ioapic_phys_id_map(physid_mask_t phys_map)
531 /* Mapping from cpu number to logical apicid */
532 static inline int default_cpu_to_logical_apicid(int cpu)
537 static inline int __default_cpu_present_to_apicid(int mps_cpu)
539 if (mps_cpu < nr_cpu_ids && cpu_present(mps_cpu))
540 return (int)per_cpu(x86_bios_cpu_apicid, mps_cpu);
546 __default_check_phys_apicid_present(int boot_cpu_physical_apicid)
548 return physid_isset(boot_cpu_physical_apicid, phys_cpu_present_map);
552 static inline int default_cpu_present_to_apicid(int mps_cpu)
554 return __default_cpu_present_to_apicid(mps_cpu);
558 default_check_phys_apicid_present(int boot_cpu_physical_apicid)
560 return __default_check_phys_apicid_present(boot_cpu_physical_apicid);
563 extern int default_cpu_present_to_apicid(int mps_cpu);
564 extern int default_check_phys_apicid_present(int boot_cpu_physical_apicid);
567 static inline physid_mask_t default_apicid_to_cpu_present(int phys_apicid)
569 return physid_mask_of_physid(phys_apicid);
572 #endif /* CONFIG_X86_LOCAL_APIC */
575 extern u8 cpu_2_logical_apicid[NR_CPUS];
578 #endif /* _ASM_X86_APIC_H */