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
   6 #include <asm/alternative.h>
   7 #include <asm/cpufeature.h>
   8 #include <asm/apicdef.h>
   9 #include <linux/atomic.h>
  10 #include <asm/fixmap.h>
  11 #include <asm/mpspec.h>
  12 #include <asm/msr.h>
  13
  14 #define ARCH_APICTIMER_STOPS_ON_C3      1
  15
  16 /*
  17  * Debugging macros
  18  */
  19 #define APIC_QUIET   0
  20 #define APIC_VERBOSE 1
  21 #define APIC_DEBUG   2
  22
  23 /* Macros for apic_extnmi which controls external NMI masking */
  24 #define APIC_EXTNMI_BSP         0 /* Default */
  25 #define APIC_EXTNMI_ALL         1
  26 #define APIC_EXTNMI_NONE        2
  27
  28 /*
  29  * Define the default level of output to be very little
  30  * This can be turned up by using apic=verbose for more
  31  * information and apic=debug for _lots_ of information.
  32  * apic_verbosity is defined in apic.c
  33  */
  34 #define apic_printk(v, s, a...) do {       \
  35                 if ((v) <= apic_verbosity) \
  36                         printk(s, ##a);    \
  37         } while (0)
  38
  39
  40 #if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
  41 extern void generic_apic_probe(void);
  42 #else
  43 static inline void generic_apic_probe(void)
  44 {
  45 }
  46 #endif
  47
  48 #ifdef CONFIG_X86_LOCAL_APIC
  49
  50 extern unsigned int apic_verbosity;
  51 extern int local_apic_timer_c2_ok;
  52
  53 extern int disable_apic;
  54 extern unsigned int lapic_timer_frequency;
  55
  56 extern enum apic_intr_mode_id apic_intr_mode;
  57 enum apic_intr_mode_id {
  58         APIC_PIC,
  59         APIC_VIRTUAL_WIRE,
  60         APIC_VIRTUAL_WIRE_NO_CONFIG,
  61         APIC_SYMMETRIC_IO,
  62         APIC_SYMMETRIC_IO_NO_ROUTING
  63 };
  64
  65 #ifdef CONFIG_SMP
  66 extern void __inquire_remote_apic(int apicid);
  67 #else /* CONFIG_SMP */
  68 static inline void __inquire_remote_apic(int apicid)
  69 {
  70 }
  71 #endif /* CONFIG_SMP */
  72
  73 static inline void default_inquire_remote_apic(int apicid)
  74 {
  75         if (apic_verbosity >= APIC_DEBUG)
  76                 __inquire_remote_apic(apicid);
  77 }
  78
  79 /*
  80  * With 82489DX we can't rely on apic feature bit
  81  * retrieved via cpuid but still have to deal with
  82  * such an apic chip so we assume that SMP configuration
  83  * is found from MP table (64bit case uses ACPI mostly
  84  * which set smp presence flag as well so we are safe
  85  * to use this helper too).
  86  */
  87 static inline bool apic_from_smp_config(void)
  88 {
  89         return smp_found_config && !disable_apic;
  90 }
  91
  92 /*
  93  * Basic functions accessing APICs.
  94  */
  95 #ifdef CONFIG_PARAVIRT
  96 #include <asm/paravirt.h>
  97 #endif
  98
  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, %P1", "xchgl %0, %P1", X86_BUG_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 static inline bool apic_is_x2apic_enabled(void)
 121 {
 122         u64 msr;
 123
 124         if (rdmsrl_safe(MSR_IA32_APICBASE, &msr))
 125                 return false;
 126         return msr & X2APIC_ENABLE;
 127 }
 128
 129 extern void enable_IR_x2apic(void);
 130
 131 extern int get_physical_broadcast(void);
 132
 133 extern int lapic_get_maxlvt(void);
 134 extern void clear_local_APIC(void);
 135 extern void disconnect_bsp_APIC(int virt_wire_setup);
 136 extern void disable_local_APIC(void);
 137 extern void lapic_shutdown(void);
 138 extern void sync_Arb_IDs(void);
 139 extern void init_bsp_APIC(void);
 140 extern void apic_intr_mode_init(void);
 141 extern void setup_local_APIC(void);
 142 extern void init_apic_mappings(void);
 143 void register_lapic_address(unsigned long address);
 144 extern void setup_boot_APIC_clock(void);
 145 extern void setup_secondary_APIC_clock(void);
 146 extern void lapic_update_tsc_freq(void);
 147
 148 #ifdef CONFIG_X86_64
 149 static inline int apic_force_enable(unsigned long addr)
 150 {
 151         return -1;
 152 }
 153 #else
 154 extern int apic_force_enable(unsigned long addr);
 155 #endif
 156
 157 extern void apic_bsp_setup(bool upmode);
 158 extern void apic_ap_setup(void);
 159
 160 /*
 161  * On 32bit this is mach-xxx local
 162  */
 163 #ifdef CONFIG_X86_64
 164 extern int apic_is_clustered_box(void);
 165 #else
 166 static inline int apic_is_clustered_box(void)
 167 {
 168         return 0;
 169 }
 170 #endif
 171
 172 extern int setup_APIC_eilvt(u8 lvt_off, u8 vector, u8 msg_type, u8 mask);
 173 extern void lapic_assign_system_vectors(void);
 174 extern void lapic_assign_legacy_vector(unsigned int isairq, bool replace);
 175 extern void lapic_online(void);
 176 extern void lapic_offline(void);
 177
 178 #else /* !CONFIG_X86_LOCAL_APIC */
 179 static inline void lapic_shutdown(void) { }
 180 #define local_apic_timer_c2_ok          1
 181 static inline void init_apic_mappings(void) { }
 182 static inline void disable_local_APIC(void) { }
 183 # define setup_boot_APIC_clock x86_init_noop
 184 # define setup_secondary_APIC_clock x86_init_noop
 185 static inline void lapic_update_tsc_freq(void) { }
 186 static inline void apic_intr_mode_init(void) { }
 187 static inline void lapic_assign_system_vectors(void) { }
 188 static inline void lapic_assign_legacy_vector(unsigned int i, bool r) { }
 189 #endif /* !CONFIG_X86_LOCAL_APIC */
 190
 191 #ifdef CONFIG_X86_X2APIC
 192 /*
 193  * Make previous memory operations globally visible before
 194  * sending the IPI through x2apic wrmsr. We need a serializing instruction or
 195  * mfence for this.
 196  */
 197 static inline void x2apic_wrmsr_fence(void)
 198 {
 199         asm volatile("mfence" : : : "memory");
 200 }
 201
 202 static inline void native_apic_msr_write(u32 reg, u32 v)
 203 {
 204         if (reg == APIC_DFR || reg == APIC_ID || reg == APIC_LDR ||
 205             reg == APIC_LVR)
 206                 return;
 207
 208         wrmsr(APIC_BASE_MSR + (reg >> 4), v, 0);
 209 }
 210
 211 static inline void native_apic_msr_eoi_write(u32 reg, u32 v)
 212 {
 213         __wrmsr(APIC_BASE_MSR + (APIC_EOI >> 4), APIC_EOI_ACK, 0);
 214 }
 215
 216 static inline u32 native_apic_msr_read(u32 reg)
 217 {
 218         u64 msr;
 219
 220         if (reg == APIC_DFR)
 221                 return -1;
 222
 223         rdmsrl(APIC_BASE_MSR + (reg >> 4), msr);
 224         return (u32)msr;
 225 }
 226
 227 static inline void native_x2apic_wait_icr_idle(void)
 228 {
 229         /* no need to wait for icr idle in x2apic */
 230         return;
 231 }
 232
 233 static inline u32 native_safe_x2apic_wait_icr_idle(void)
 234 {
 235         /* no need to wait for icr idle in x2apic */
 236         return 0;
 237 }
 238
 239 static inline void native_x2apic_icr_write(u32 low, u32 id)
 240 {
 241         wrmsrl(APIC_BASE_MSR + (APIC_ICR >> 4), ((__u64) id) << 32 | low);
 242 }
 243
 244 static inline u64 native_x2apic_icr_read(void)
 245 {
 246         unsigned long val;
 247
 248         rdmsrl(APIC_BASE_MSR + (APIC_ICR >> 4), val);
 249         return val;
 250 }
 251
 252 extern int x2apic_mode;
 253 extern int x2apic_phys;
 254 extern void __init check_x2apic(void);
 255 extern void x2apic_setup(void);
 256 static inline int x2apic_enabled(void)
 257 {
 258         return boot_cpu_has(X86_FEATURE_X2APIC) && apic_is_x2apic_enabled();
 259 }
 260
 261 #define x2apic_supported()      (boot_cpu_has(X86_FEATURE_X2APIC))
 262 #else /* !CONFIG_X86_X2APIC */
 263 static inline void check_x2apic(void) { }
 264 static inline void x2apic_setup(void) { }
 265 static inline int x2apic_enabled(void) { return 0; }
 266
 267 #define x2apic_mode             (0)
 268 #define x2apic_supported()      (0)
 269 #endif /* !CONFIG_X86_X2APIC */
 270
 271 struct irq_data;
 272
 273 /*
 274  * Copyright 2004 James Cleverdon, IBM.
 275  * Subject to the GNU Public License, v.2
 276  *
 277  * Generic APIC sub-arch data struct.
 278  *
 279  * Hacked for x86-64 by James Cleverdon from i386 architecture code by
 280  * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and
 281  * James Cleverdon.
 282  */
 283 struct apic {
 284         /* Hotpath functions first */
 285         void    (*eoi_write)(u32 reg, u32 v);
 286         void    (*native_eoi_write)(u32 reg, u32 v);
 287         void    (*write)(u32 reg, u32 v);
 288         u32     (*read)(u32 reg);
 289
 290         /* IPI related functions */
 291         void    (*wait_icr_idle)(void);
 292         u32     (*safe_wait_icr_idle)(void);
 293
 294         void    (*send_IPI)(int cpu, int vector);
 295         void    (*send_IPI_mask)(const struct cpumask *mask, int vector);
 296         void    (*send_IPI_mask_allbutself)(const struct cpumask *msk, int vec);
 297         void    (*send_IPI_allbutself)(int vector);
 298         void    (*send_IPI_all)(int vector);
 299         void    (*send_IPI_self)(int vector);
 300
 301         /* dest_logical is used by the IPI functions */
 302         u32     dest_logical;
 303         u32     disable_esr;
 304         u32     irq_delivery_mode;
 305         u32     irq_dest_mode;
 306
 307         /* Functions and data related to vector allocation */
 308         void    (*vector_allocation_domain)(int cpu, struct cpumask *retmask,
 309                                             const struct cpumask *mask);
 310         int     (*cpu_mask_to_apicid)(const struct cpumask *cpumask,
 311                                       struct irq_data *irqdata,
 312                                       unsigned int *apicid);
 313         u32     (*calc_dest_apicid)(unsigned int cpu);
 314
 315         /* ICR related functions */
 316         u64     (*icr_read)(void);
 317         void    (*icr_write)(u32 low, u32 high);
 318
 319         /* Probe, setup and smpboot functions */
 320         int     (*probe)(void);
 321         int     (*acpi_madt_oem_check)(char *oem_id, char *oem_table_id);
 322         int     (*apic_id_valid)(int apicid);
 323         int     (*apic_id_registered)(void);
 324
 325         bool    (*check_apicid_used)(physid_mask_t *map, int apicid);
 326         void    (*init_apic_ldr)(void);
 327         void    (*ioapic_phys_id_map)(physid_mask_t *phys_map, physid_mask_t *retmap);
 328         void    (*setup_apic_routing)(void);
 329         int     (*cpu_present_to_apicid)(int mps_cpu);
 330         void    (*apicid_to_cpu_present)(int phys_apicid, physid_mask_t *retmap);
 331         int     (*check_phys_apicid_present)(int phys_apicid);
 332         int     (*phys_pkg_id)(int cpuid_apic, int index_msb);
 333
 334         u32     (*get_apic_id)(unsigned long x);
 335         u32     (*set_apic_id)(unsigned int id);
 336
 337         /* wakeup_secondary_cpu */
 338         int     (*wakeup_secondary_cpu)(int apicid, unsigned long start_eip);
 339
 340         void    (*inquire_remote_apic)(int apicid);
 341
 342 #ifdef CONFIG_X86_32
 343         /*
 344          * Called very early during boot from get_smp_config().  It should
 345          * return the logical apicid.  x86_[bios]_cpu_to_apicid is
 346          * initialized before this function is called.
 347          *
 348          * If logical apicid can't be determined that early, the function
 349          * may return BAD_APICID.  Logical apicid will be configured after
 350          * init_apic_ldr() while bringing up CPUs.  Note that NUMA affinity
 351          * won't be applied properly during early boot in this case.
 352          */
 353         int (*x86_32_early_logical_apicid)(int cpu);
 354 #endif
 355         char    *name;
 356 };
 357
 358 /*
 359  * Pointer to the local APIC driver in use on this system (there's
 360  * always just one such driver in use - the kernel decides via an
 361  * early probing process which one it picks - and then sticks to it):
 362  */
 363 extern struct apic *apic;
 364
 365 /*
 366  * APIC drivers are probed based on how they are listed in the .apicdrivers
 367  * section. So the order is important and enforced by the ordering
 368  * of different apic driver files in the Makefile.
 369  *
 370  * For the files having two apic drivers, we use apic_drivers()
 371  * to enforce the order with in them.
 372  */
 373 #define apic_driver(sym)                                        \
 374         static const struct apic *__apicdrivers_##sym __used            \
 375         __aligned(sizeof(struct apic *))                        \
 376         __section(.apicdrivers) = { &sym }
 377
 378 #define apic_drivers(sym1, sym2)                                        \
 379         static struct apic *__apicdrivers_##sym1##sym2[2] __used        \
 380         __aligned(sizeof(struct apic *))                                \
 381         __section(.apicdrivers) = { &sym1, &sym2 }
 382
 383 extern struct apic *__apicdrivers[], *__apicdrivers_end[];
 384
 385 /*
 386  * APIC functionality to boot other CPUs - only used on SMP:
 387  */
 388 #ifdef CONFIG_SMP
 389 extern int wakeup_secondary_cpu_via_nmi(int apicid, unsigned long start_eip);
 390 extern int lapic_can_unplug_cpu(void);
 391 #endif
 392
 393 #ifdef CONFIG_X86_LOCAL_APIC
 394
 395 static inline u32 apic_read(u32 reg)
 396 {
 397         return apic->read(reg);
 398 }
 399
 400 static inline void apic_write(u32 reg, u32 val)
 401 {
 402         apic->write(reg, val);
 403 }
 404
 405 static inline void apic_eoi(void)
 406 {
 407         apic->eoi_write(APIC_EOI, APIC_EOI_ACK);
 408 }
 409
 410 static inline u64 apic_icr_read(void)
 411 {
 412         return apic->icr_read();
 413 }
 414
 415 static inline void apic_icr_write(u32 low, u32 high)
 416 {
 417         apic->icr_write(low, high);
 418 }
 419
 420 static inline void apic_wait_icr_idle(void)
 421 {
 422         apic->wait_icr_idle();
 423 }
 424
 425 static inline u32 safe_apic_wait_icr_idle(void)
 426 {
 427         return apic->safe_wait_icr_idle();
 428 }
 429
 430 extern void __init apic_set_eoi_write(void (*eoi_write)(u32 reg, u32 v));
 431
 432 #else /* CONFIG_X86_LOCAL_APIC */
 433
 434 static inline u32 apic_read(u32 reg) { return 0; }
 435 static inline void apic_write(u32 reg, u32 val) { }
 436 static inline void apic_eoi(void) { }
 437 static inline u64 apic_icr_read(void) { return 0; }
 438 static inline void apic_icr_write(u32 low, u32 high) { }
 439 static inline void apic_wait_icr_idle(void) { }
 440 static inline u32 safe_apic_wait_icr_idle(void) { return 0; }
 441 static inline void apic_set_eoi_write(void (*eoi_write)(u32 reg, u32 v)) {}
 442
 443 #endif /* CONFIG_X86_LOCAL_APIC */
 444
 445 static inline void ack_APIC_irq(void)
 446 {
 447         /*
 448          * ack_APIC_irq() actually gets compiled as a single instruction
 449          * ... yummie.
 450          */
 451         apic_eoi();
 452 }
 453
 454 static inline unsigned default_get_apic_id(unsigned long x)
 455 {
 456         unsigned int ver = GET_APIC_VERSION(apic_read(APIC_LVR));
 457
 458         if (APIC_XAPIC(ver) || boot_cpu_has(X86_FEATURE_EXTD_APICID))
 459                 return (x >> 24) & 0xFF;
 460         else
 461                 return (x >> 24) & 0x0F;
 462 }
 463
 464 /*
 465  * Warm reset vector position:
 466  */
 467 #define TRAMPOLINE_PHYS_LOW             0x467
 468 #define TRAMPOLINE_PHYS_HIGH            0x469
 469
 470 #ifdef CONFIG_X86_64
 471 extern void apic_send_IPI_self(int vector);
 472
 473 DECLARE_PER_CPU(int, x2apic_extra_bits);
 474 #endif
 475
 476 extern void generic_bigsmp_probe(void);
 477
 478 #ifdef CONFIG_X86_LOCAL_APIC
 479
 480 #include <asm/smp.h>
 481
 482 #define APIC_DFR_VALUE  (APIC_DFR_FLAT)
 483
 484 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid);
 485
 486 extern struct apic apic_noop;
 487
 488 static inline unsigned int read_apic_id(void)
 489 {
 490         unsigned int reg = apic_read(APIC_ID);
 491
 492         return apic->get_apic_id(reg);
 493 }
 494
 495 extern int default_apic_id_valid(int apicid);
 496 extern int default_acpi_madt_oem_check(char *, char *);
 497 extern void default_setup_apic_routing(void);
 498
 499 extern u32 apic_default_calc_apicid(unsigned int cpu);
 500 extern u32 apic_flat_calc_apicid(unsigned int cpu);
 501
 502 extern int flat_cpu_mask_to_apicid(const struct cpumask *cpumask,
 503                                    struct irq_data *irqdata,
 504                                    unsigned int *apicid);
 505 extern int default_cpu_mask_to_apicid(const struct cpumask *cpumask,
 506                                       struct irq_data *irqdata,
 507                                       unsigned int *apicid);
 508 extern bool default_check_apicid_used(physid_mask_t *map, int apicid);
 509 extern void flat_vector_allocation_domain(int cpu, struct cpumask *retmask,
 510                                    const struct cpumask *mask);
 511 extern void default_vector_allocation_domain(int cpu, struct cpumask *retmask,
 512                                       const struct cpumask *mask);
 513 extern void default_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap);
 514 extern int default_cpu_present_to_apicid(int mps_cpu);
 515 extern int default_check_phys_apicid_present(int phys_apicid);
 516
 517 #endif /* CONFIG_X86_LOCAL_APIC */
 518
 519 extern void irq_enter(void);
 520 extern void irq_exit(void);
 521
 522 static inline void entering_irq(void)
 523 {
 524         irq_enter();
 525 }
 526
 527 static inline void entering_ack_irq(void)
 528 {
 529         entering_irq();
 530         ack_APIC_irq();
 531 }
 532
 533 static inline void ipi_entering_ack_irq(void)
 534 {
 535         irq_enter();
 536         ack_APIC_irq();
 537 }
 538
 539 static inline void exiting_irq(void)
 540 {
 541         irq_exit();
 542 }
 543
 544 static inline void exiting_ack_irq(void)
 545 {
 546         ack_APIC_irq();
 547         irq_exit();
 548 }
 549
 550 extern void ioapic_zap_locks(void);
 551
 552 #endif /* _ASM_X86_APIC_H */