arch/x86/include/asm/apic.h

   1 #ifndef _ASM_X86_APIC_H
   2 #define _ASM_X86_APIC_H
   3
   4 #include <linux/cpumask.h>
   5 #include <linux/delay.h>
   6 #include <linux/pm.h>
   7
   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>
  16 #include <asm/msr.h>
  17
  18 #define ARCH_APICTIMER_STOPS_ON_C3      1
  19
  20 /*
  21  * Debugging macros
  22  */
  23 #define APIC_QUIET   0
  24 #define APIC_VERBOSE 1
  25 #define APIC_DEBUG   2
  26
  27 /*
  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
  32  */
  33 #define apic_printk(v, s, a...) do {       \
  34                 if ((v) <= apic_verbosity) \
  35                         printk(s, ##a);    \
  36         } while (0)
  37
  38
  39 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
  40 extern void generic_apic_probe(void);
  41 #else
  42 static inline void generic_apic_probe(void)
  43 {
  44 }
  45 #endif
  46
  47 #ifdef CONFIG_X86_LOCAL_APIC
  48
  49 extern unsigned int apic_verbosity;
  50 extern int local_apic_timer_c2_ok;
  51
  52 extern int disable_apic;
  53
  54 #ifdef CONFIG_SMP
  55 extern void __inquire_remote_apic(int apicid);
  56 #else /* CONFIG_SMP */
  57 static inline void __inquire_remote_apic(int apicid)
  58 {
  59 }
  60 #endif /* CONFIG_SMP */
  61
  62 static inline void default_inquire_remote_apic(int apicid)
  63 {
  64         if (apic_verbosity >= APIC_DEBUG)
  65                 __inquire_remote_apic(apicid);
  66 }
  67
  68 /*
  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).
  75  */
  76 static inline bool apic_from_smp_config(void)
  77 {
  78         return smp_found_config && !disable_apic;
  79 }
  80
  81 /*
  82  * Basic functions accessing APICs.
  83  */
  84 #ifdef CONFIG_PARAVIRT
  85 #include <asm/paravirt.h>
  86 #endif
  87
  88 #ifdef CONFIG_X86_64
  89 extern int is_vsmp_box(void);
  90 #else
  91 static inline int is_vsmp_box(void)
  92 {
  93         return 0;
  94 }
  95 #endif
  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);
 100
 101 static inline void native_apic_mem_write(u32 reg, u32 v)
 102 {
 103         volatile u32 *addr = (volatile u32 *)(APIC_BASE + reg);
 104
 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)));
 108 }
 109
 110 static inline u32 native_apic_mem_read(u32 reg)
 111 {
 112         return *((volatile u32 *)(APIC_BASE + reg));
 113 }
 114
 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);
 119
 120 extern int x2apic_mode;
 121
 122 #ifdef CONFIG_X86_X2APIC
 123 /*
 124  * Make previous memory operations globally visible before
 125  * sending the IPI through x2apic wrmsr. We need a serializing instruction or
 126  * mfence for this.
 127  */
 128 static inline void x2apic_wrmsr_fence(void)
 129 {
 130         asm volatile("mfence" : : : "memory");
 131 }
 132
 133 static inline void native_apic_msr_write(u32 reg, u32 v)
 134 {
 135         if (reg == APIC_DFR || reg == APIC_ID || reg == APIC_LDR ||
 136             reg == APIC_LVR)
 137                 return;
 138
 139         wrmsr(APIC_BASE_MSR + (reg >> 4), v, 0);
 140 }
 141
 142 static inline u32 native_apic_msr_read(u32 reg)
 143 {
 144         u32 low, high;
 145
 146         if (reg == APIC_DFR)
 147                 return -1;
 148
 149         rdmsr(APIC_BASE_MSR + (reg >> 4), low, high);
 150         return low;
 151 }
 152
 153 static inline void native_x2apic_wait_icr_idle(void)
 154 {
 155         /* no need to wait for icr idle in x2apic */
 156         return;
 157 }
 158
 159 static inline u32 native_safe_x2apic_wait_icr_idle(void)
 160 {
 161         /* no need to wait for icr idle in x2apic */
 162         return 0;
 163 }
 164
 165 static inline void native_x2apic_icr_write(u32 low, u32 id)
 166 {
 167         wrmsrl(APIC_BASE_MSR + (APIC_ICR >> 4), ((__u64) id) << 32 | low);
 168 }
 169
 170 static inline u64 native_x2apic_icr_read(void)
 171 {
 172         unsigned long val;
 173
 174         rdmsrl(APIC_BASE_MSR + (APIC_ICR >> 4), val);
 175         return val;
 176 }
 177
 178 extern int x2apic_phys;
 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)
 183 {
 184         int msr, msr2;
 185
 186         if (!cpu_has_x2apic)
 187                 return 0;
 188
 189         rdmsr(MSR_IA32_APICBASE, msr, msr2);
 190         if (msr & X2APIC_ENABLE)
 191                 return 1;
 192         return 0;
 193 }
 194
 195 #define x2apic_supported()      (cpu_has_x2apic)
 196 static inline void x2apic_force_phys(void)
 197 {
 198         x2apic_phys = 1;
 199 }
 200 #else
 201 static inline void check_x2apic(void)
 202 {
 203 }
 204 static inline void enable_x2apic(void)
 205 {
 206 }
 207 static inline int x2apic_enabled(void)
 208 {
 209         return 0;
 210 }
 211 static inline void x2apic_force_phys(void)
 212 {
 213 }
 214
 215 #define x2apic_preenabled 0
 216 #define x2apic_supported()      0
 217 #endif
 218
 219 extern void enable_IR_x2apic(void);
 220
 221 extern int get_physical_broadcast(void);
 222
 223 extern void apic_disable(void);
 224 extern int lapic_get_maxlvt(void);
 225 extern void clear_local_APIC(void);
 226 extern void connect_bsp_APIC(void);
 227 extern void disconnect_bsp_APIC(int virt_wire_setup);
 228 extern void disable_local_APIC(void);
 229 extern void lapic_shutdown(void);
 230 extern int verify_local_APIC(void);
 231 extern void cache_APIC_registers(void);
 232 extern void sync_Arb_IDs(void);
 233 extern void init_bsp_APIC(void);
 234 extern void setup_local_APIC(void);
 235 extern void end_local_APIC_setup(void);
 236 extern void init_apic_mappings(void);
 237 extern void setup_boot_APIC_clock(void);
 238 extern void setup_secondary_APIC_clock(void);
 239 extern int APIC_init_uniprocessor(void);
 240 extern void enable_NMI_through_LVT0(void);
 241
 242 /*
 243  * On 32bit this is mach-xxx local
 244  */
 245 #ifdef CONFIG_X86_64
 246 extern void early_init_lapic_mapping(void);
 247 extern int apic_is_clustered_box(void);
 248 #else
 249 static inline int apic_is_clustered_box(void)
 250 {
 251         return 0;
 252 }
 253 #endif
 254
 255 extern u8 setup_APIC_eilvt_mce(u8 vector, u8 msg_type, u8 mask);
 256 extern u8 setup_APIC_eilvt_ibs(u8 vector, u8 msg_type, u8 mask);
 257
 258
 259 #else /* !CONFIG_X86_LOCAL_APIC */
 260 static inline void lapic_shutdown(void) { }
 261 #define local_apic_timer_c2_ok          1
 262 static inline void init_apic_mappings(void) { }
 263 static inline void disable_local_APIC(void) { }
 264 static inline void apic_disable(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 */
 268
 269 #ifdef CONFIG_X86_64
 270 #define SET_APIC_ID(x)          (apic->set_apic_id(x))
 271 #else
 272
 273 #endif
 274
 275 /*
 276  * Copyright 2004 James Cleverdon, IBM.
 277  * Subject to the GNU Public License, v.2
 278  *
 279  * Generic APIC sub-arch data struct.
 280  *
 281  * Hacked for x86-64 by James Cleverdon from i386 architecture code by
 282  * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and
 283  * James Cleverdon.
 284  */
 285 struct apic {
 286         char *name;
 287
 288         int (*probe)(void);
 289         int (*acpi_madt_oem_check)(char *oem_id, char *oem_table_id);
 290         int (*apic_id_registered)(void);
 291
 292         u32 irq_delivery_mode;
 293         u32 irq_dest_mode;
 294
 295         const struct cpumask *(*target_cpus)(void);
 296
 297         int disable_esr;
 298
 299         int dest_logical;
 300         unsigned long (*check_apicid_used)(physid_mask_t *map, int apicid);
 301         unsigned long (*check_apicid_present)(int apicid);
 302
 303         void (*vector_allocation_domain)(int cpu, struct cpumask *retmask);
 304         void (*init_apic_ldr)(void);
 305
 306         void (*ioapic_phys_id_map)(physid_mask_t *phys_map, physid_mask_t *retmap);
 307
 308         void (*setup_apic_routing)(void);
 309         int (*multi_timer_check)(int apic, int irq);
 310         int (*apicid_to_node)(int logical_apicid);
 311         int (*cpu_to_logical_apicid)(int cpu);
 312         int (*cpu_present_to_apicid)(int mps_cpu);
 313         void (*apicid_to_cpu_present)(int phys_apicid, physid_mask_t *retmap);
 314         void (*setup_portio_remap)(void);
 315         int (*check_phys_apicid_present)(int phys_apicid);
 316         void (*enable_apic_mode)(void);
 317         int (*phys_pkg_id)(int cpuid_apic, int index_msb);
 318
 319         /*
 320          * When one of the next two hooks returns 1 the apic
 321          * is switched to this. Essentially they are additional
 322          * probe functions:
 323          */
 324         int (*mps_oem_check)(struct mpc_table *mpc, char *oem, char *productid);
 325
 326         unsigned int (*get_apic_id)(unsigned long x);
 327         unsigned long (*set_apic_id)(unsigned int id);
 328         unsigned long apic_id_mask;
 329
 330         unsigned int (*cpu_mask_to_apicid)(const struct cpumask *cpumask);
 331         unsigned int (*cpu_mask_to_apicid_and)(const struct cpumask *cpumask,
 332                                                const struct cpumask *andmask);
 333
 334         /* ipi */
 335         void (*send_IPI_mask)(const struct cpumask *mask, int vector);
 336         void (*send_IPI_mask_allbutself)(const struct cpumask *mask,
 337                                          int vector);
 338         void (*send_IPI_allbutself)(int vector);
 339         void (*send_IPI_all)(int vector);
 340         void (*send_IPI_self)(int vector);
 341
 342         /* wakeup_secondary_cpu */
 343         int (*wakeup_secondary_cpu)(int apicid, unsigned long start_eip);
 344
 345         int trampoline_phys_low;
 346         int trampoline_phys_high;
 347
 348         void (*wait_for_init_deassert)(atomic_t *deassert);
 349         void (*smp_callin_clear_local_apic)(void);
 350         void (*inquire_remote_apic)(int apicid);
 351
 352         /* apic ops */
 353         u32 (*read)(u32 reg);
 354         void (*write)(u32 reg, u32 v);
 355         u64 (*icr_read)(void);
 356         void (*icr_write)(u32 low, u32 high);
 357         void (*wait_icr_idle)(void);
 358         u32 (*safe_wait_icr_idle)(void);
 359 };
 360
 361 /*
 362  * Pointer to the local APIC driver in use on this system (there's
 363  * always just one such driver in use - the kernel decides via an
 364  * early probing process which one it picks - and then sticks to it):
 365  */
 366 extern struct apic *apic;
 367
 368 /*
 369  * APIC functionality to boot other CPUs - only used on SMP:
 370  */
 371 #ifdef CONFIG_SMP
 372 extern atomic_t init_deasserted;
 373 extern int wakeup_secondary_cpu_via_nmi(int apicid, unsigned long start_eip);
 374 #endif
 375
 376 #ifdef CONFIG_X86_LOCAL_APIC
 377 static inline u32 apic_read(u32 reg)
 378 {
 379         return apic->read(reg);
 380 }
 381
 382 static inline void apic_write(u32 reg, u32 val)
 383 {
 384         apic->write(reg, val);
 385 }
 386
 387 static inline u64 apic_icr_read(void)
 388 {
 389         return apic->icr_read();
 390 }
 391
 392 static inline void apic_icr_write(u32 low, u32 high)
 393 {
 394         apic->icr_write(low, high);
 395 }
 396
 397 static inline void apic_wait_icr_idle(void)
 398 {
 399         apic->wait_icr_idle();
 400 }
 401
 402 static inline u32 safe_apic_wait_icr_idle(void)
 403 {
 404         return apic->safe_wait_icr_idle();
 405 }
 406
 407 #else /* CONFIG_X86_LOCAL_APIC */
 408
 409 static inline u32 apic_read(u32 reg) { return 0; }
 410 static inline void apic_write(u32 reg, u32 val) { }
 411 static inline u64 apic_icr_read(void) { return 0; }
 412 static inline void apic_icr_write(u32 low, u32 high) { }
 413 static inline void apic_wait_icr_idle(void) { }
 414 static inline u32 safe_apic_wait_icr_idle(void) { return 0; }
 415
 416 #endif /* CONFIG_X86_LOCAL_APIC */
 417
 418 static inline void ack_APIC_irq(void)
 419 {
 420         /*
 421          * ack_APIC_irq() actually gets compiled as a single instruction
 422          * ... yummie.
 423          */
 424
 425         /* Docs say use 0 for future compatibility */
 426         apic_write(APIC_EOI, 0);
 427 }
 428
 429 static inline unsigned default_get_apic_id(unsigned long x)
 430 {
 431         unsigned int ver = GET_APIC_VERSION(apic_read(APIC_LVR));
 432
 433         if (APIC_XAPIC(ver) || boot_cpu_has(X86_FEATURE_EXTD_APICID))
 434                 return (x >> 24) & 0xFF;
 435         else
 436                 return (x >> 24) & 0x0F;
 437 }
 438
 439 /*
 440  * Warm reset vector default position:
 441  */
 442 #define DEFAULT_TRAMPOLINE_PHYS_LOW             0x467
 443 #define DEFAULT_TRAMPOLINE_PHYS_HIGH            0x469
 444
 445 #ifdef CONFIG_X86_64
 446 extern struct apic apic_flat;
 447 extern struct apic apic_physflat;
 448 extern struct apic apic_x2apic_cluster;
 449 extern struct apic apic_x2apic_phys;
 450 extern int default_acpi_madt_oem_check(char *, char *);
 451
 452 extern void apic_send_IPI_self(int vector);
 453
 454 extern struct apic apic_x2apic_uv_x;
 455 DECLARE_PER_CPU(int, x2apic_extra_bits);
 456
 457 extern int default_cpu_present_to_apicid(int mps_cpu);
 458 extern int default_check_phys_apicid_present(int phys_apicid);
 459 #endif
 460
 461 static inline void default_wait_for_init_deassert(atomic_t *deassert)
 462 {
 463         while (!atomic_read(deassert))
 464                 cpu_relax();
 465         return;
 466 }
 467
 468 extern void generic_bigsmp_probe(void);
 469
 470
 471 #ifdef CONFIG_X86_LOCAL_APIC
 472
 473 #include <asm/smp.h>
 474
 475 #define APIC_DFR_VALUE  (APIC_DFR_FLAT)
 476
 477 static inline const struct cpumask *default_target_cpus(void)
 478 {
 479 #ifdef CONFIG_SMP
 480         return cpu_online_mask;
 481 #else
 482         return cpumask_of(0);
 483 #endif
 484 }
 485
 486 DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid);
 487
 488
 489 static inline unsigned int read_apic_id(void)
 490 {
 491         unsigned int reg;
 492
 493         reg = apic_read(APIC_ID);
 494
 495         return apic->get_apic_id(reg);
 496 }
 497
 498 extern void default_setup_apic_routing(void);
 499
 500 extern struct apic apic_noop;
 501
 502 #ifdef CONFIG_X86_32
 503
 504 extern struct apic apic_default;
 505
 506 /*
 507  * Set up the logical destination ID.
 508  *
 509  * Intel recommends to set DFR, LDR and TPR before enabling
 510  * an APIC.  See e.g. "AP-388 82489DX User's Manual" (Intel
 511  * document number 292116).  So here it goes...
 512  */
 513 extern void default_init_apic_ldr(void);
 514
 515 static inline int default_apic_id_registered(void)
 516 {
 517         return physid_isset(read_apic_id(), phys_cpu_present_map);
 518 }
 519
 520 static inline int default_phys_pkg_id(int cpuid_apic, int index_msb)
 521 {
 522         return cpuid_apic >> index_msb;
 523 }
 524
 525 extern int default_apicid_to_node(int logical_apicid);
 526
 527 #endif
 528
 529 static inline unsigned int
 530 default_cpu_mask_to_apicid(const struct cpumask *cpumask)
 531 {
 532         return cpumask_bits(cpumask)[0] & APIC_ALL_CPUS;
 533 }
 534
 535 static inline unsigned int
 536 default_cpu_mask_to_apicid_and(const struct cpumask *cpumask,
 537                                const struct cpumask *andmask)
 538 {
 539         unsigned long mask1 = cpumask_bits(cpumask)[0];
 540         unsigned long mask2 = cpumask_bits(andmask)[0];
 541         unsigned long mask3 = cpumask_bits(cpu_online_mask)[0];
 542
 543         return (unsigned int)(mask1 & mask2 & mask3);
 544 }
 545
 546 static inline unsigned long default_check_apicid_used(physid_mask_t *map, int apicid)
 547 {
 548         return physid_isset(apicid, *map);
 549 }
 550
 551 static inline unsigned long default_check_apicid_present(int bit)
 552 {
 553         return physid_isset(bit, phys_cpu_present_map);
 554 }
 555
 556 static inline void default_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
 557 {
 558         *retmap = *phys_map;
 559 }
 560
 561 /* Mapping from cpu number to logical apicid */
 562 static inline int default_cpu_to_logical_apicid(int cpu)
 563 {
 564         return 1 << cpu;
 565 }
 566
 567 static inline int __default_cpu_present_to_apicid(int mps_cpu)
 568 {
 569         if (mps_cpu < nr_cpu_ids && cpu_present(mps_cpu))
 570                 return (int)per_cpu(x86_bios_cpu_apicid, mps_cpu);
 571         else
 572                 return BAD_APICID;
 573 }
 574
 575 static inline int
 576 __default_check_phys_apicid_present(int phys_apicid)
 577 {
 578         return physid_isset(phys_apicid, phys_cpu_present_map);
 579 }
 580
 581 #ifdef CONFIG_X86_32
 582 static inline int default_cpu_present_to_apicid(int mps_cpu)
 583 {
 584         return __default_cpu_present_to_apicid(mps_cpu);
 585 }
 586
 587 static inline int
 588 default_check_phys_apicid_present(int phys_apicid)
 589 {
 590         return __default_check_phys_apicid_present(phys_apicid);
 591 }
 592 #else
 593 extern int default_cpu_present_to_apicid(int mps_cpu);
 594 extern int default_check_phys_apicid_present(int phys_apicid);
 595 #endif
 596
 597 #endif /* CONFIG_X86_LOCAL_APIC */
 598
 599 #ifdef CONFIG_X86_32
 600 extern u8 cpu_2_logical_apicid[NR_CPUS];
 601 #endif
 602
 603 #endif /* _ASM_X86_APIC_H */