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 #ifdef CONFIG_SMP 57 extern void __inquire_remote_apic(int apicid); 58 #else /* CONFIG_SMP */ 59 static inline void __inquire_remote_apic(int apicid) 60 { 61 } 62 #endif /* CONFIG_SMP */ 63 64 static inline void default_inquire_remote_apic(int apicid) 65 { 66 if (apic_verbosity >= APIC_DEBUG) 67 __inquire_remote_apic(apicid); 68 } 69 70 /* 71 * With 82489DX we can't rely on apic feature bit 72 * retrieved via cpuid but still have to deal with 73 * such an apic chip so we assume that SMP configuration 74 * is found from MP table (64bit case uses ACPI mostly 75 * which set smp presence flag as well so we are safe 76 * to use this helper too). 77 */ 78 static inline bool apic_from_smp_config(void) 79 { 80 return smp_found_config && !disable_apic; 81 } 82 83 /* 84 * Basic functions accessing APICs. 85 */ 86 #ifdef CONFIG_PARAVIRT 87 #include <asm/paravirt.h> 88 #endif 89 90 extern int setup_profiling_timer(unsigned int); 91 92 static inline void native_apic_mem_write(u32 reg, u32 v) 93 { 94 volatile u32 *addr = (volatile u32 *)(APIC_BASE + reg); 95 96 alternative_io("movl %0, %P1", "xchgl %0, %P1", X86_BUG_11AP, 97 ASM_OUTPUT2("=r" (v), "=m" (*addr)), 98 ASM_OUTPUT2("0" (v), "m" (*addr))); 99 } 100 101 static inline u32 native_apic_mem_read(u32 reg) 102 { 103 return *((volatile u32 *)(APIC_BASE + reg)); 104 } 105 106 extern void native_apic_wait_icr_idle(void); 107 extern u32 native_safe_apic_wait_icr_idle(void); 108 extern void native_apic_icr_write(u32 low, u32 id); 109 extern u64 native_apic_icr_read(void); 110 111 static inline bool apic_is_x2apic_enabled(void) 112 { 113 u64 msr; 114 115 if (rdmsrl_safe(MSR_IA32_APICBASE, &msr)) 116 return false; 117 return msr & X2APIC_ENABLE; 118 } 119 120 extern void enable_IR_x2apic(void); 121 122 extern int get_physical_broadcast(void); 123 124 extern int lapic_get_maxlvt(void); 125 extern void clear_local_APIC(void); 126 extern void disconnect_bsp_APIC(int virt_wire_setup); 127 extern void disable_local_APIC(void); 128 extern void lapic_shutdown(void); 129 extern void sync_Arb_IDs(void); 130 extern void init_bsp_APIC(void); 131 extern void setup_local_APIC(void); 132 extern void init_apic_mappings(void); 133 void register_lapic_address(unsigned long address); 134 extern void setup_boot_APIC_clock(void); 135 extern void setup_secondary_APIC_clock(void); 136 extern void lapic_update_tsc_freq(void); 137 extern int APIC_init_uniprocessor(void); 138 139 #ifdef CONFIG_X86_64 140 static inline int apic_force_enable(unsigned long addr) 141 { 142 return -1; 143 } 144 #else 145 extern int apic_force_enable(unsigned long addr); 146 #endif 147 148 extern int apic_bsp_setup(bool upmode); 149 extern void apic_ap_setup(void); 150 151 /* 152 * On 32bit this is mach-xxx local 153 */ 154 #ifdef CONFIG_X86_64 155 extern int apic_is_clustered_box(void); 156 #else 157 static inline int apic_is_clustered_box(void) 158 { 159 return 0; 160 } 161 #endif 162 163 extern int setup_APIC_eilvt(u8 lvt_off, u8 vector, u8 msg_type, u8 mask); 164 165 #else /* !CONFIG_X86_LOCAL_APIC */ 166 static inline void lapic_shutdown(void) { } 167 #define local_apic_timer_c2_ok 1 168 static inline void init_apic_mappings(void) { } 169 static inline void disable_local_APIC(void) { } 170 # define setup_boot_APIC_clock x86_init_noop 171 # define setup_secondary_APIC_clock x86_init_noop 172 static inline void lapic_update_tsc_freq(void) { } 173 #endif /* !CONFIG_X86_LOCAL_APIC */ 174 175 #ifdef CONFIG_X86_X2APIC 176 /* 177 * Make previous memory operations globally visible before 178 * sending the IPI through x2apic wrmsr. We need a serializing instruction or 179 * mfence for this. 180 */ 181 static inline void x2apic_wrmsr_fence(void) 182 { 183 asm volatile("mfence" : : : "memory"); 184 } 185 186 static inline void native_apic_msr_write(u32 reg, u32 v) 187 { 188 if (reg == APIC_DFR || reg == APIC_ID || reg == APIC_LDR || 189 reg == APIC_LVR) 190 return; 191 192 wrmsr(APIC_BASE_MSR + (reg >> 4), v, 0); 193 } 194 195 static inline void native_apic_msr_eoi_write(u32 reg, u32 v) 196 { 197 __wrmsr(APIC_BASE_MSR + (APIC_EOI >> 4), APIC_EOI_ACK, 0); 198 } 199 200 static inline u32 native_apic_msr_read(u32 reg) 201 { 202 u64 msr; 203 204 if (reg == APIC_DFR) 205 return -1; 206 207 rdmsrl(APIC_BASE_MSR + (reg >> 4), msr); 208 return (u32)msr; 209 } 210 211 static inline void native_x2apic_wait_icr_idle(void) 212 { 213 /* no need to wait for icr idle in x2apic */ 214 return; 215 } 216 217 static inline u32 native_safe_x2apic_wait_icr_idle(void) 218 { 219 /* no need to wait for icr idle in x2apic */ 220 return 0; 221 } 222 223 static inline void native_x2apic_icr_write(u32 low, u32 id) 224 { 225 wrmsrl(APIC_BASE_MSR + (APIC_ICR >> 4), ((__u64) id) << 32 | low); 226 } 227 228 static inline u64 native_x2apic_icr_read(void) 229 { 230 unsigned long val; 231 232 rdmsrl(APIC_BASE_MSR + (APIC_ICR >> 4), val); 233 return val; 234 } 235 236 extern int x2apic_mode; 237 extern int x2apic_phys; 238 extern void __init check_x2apic(void); 239 extern void x2apic_setup(void); 240 static inline int x2apic_enabled(void) 241 { 242 return boot_cpu_has(X86_FEATURE_X2APIC) && apic_is_x2apic_enabled(); 243 } 244 245 #define x2apic_supported() (boot_cpu_has(X86_FEATURE_X2APIC)) 246 #else /* !CONFIG_X86_X2APIC */ 247 static inline void check_x2apic(void) { } 248 static inline void x2apic_setup(void) { } 249 static inline int x2apic_enabled(void) { return 0; } 250 251 #define x2apic_mode (0) 252 #define x2apic_supported() (0) 253 #endif /* !CONFIG_X86_X2APIC */ 254 255 #ifdef CONFIG_X86_64 256 #define SET_APIC_ID(x) (apic->set_apic_id(x)) 257 #else 258 259 #endif 260 261 /* 262 * Copyright 2004 James Cleverdon, IBM. 263 * Subject to the GNU Public License, v.2 264 * 265 * Generic APIC sub-arch data struct. 266 * 267 * Hacked for x86-64 by James Cleverdon from i386 architecture code by 268 * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and 269 * James Cleverdon. 270 */ 271 struct apic { 272 char *name; 273 274 int (*probe)(void); 275 int (*acpi_madt_oem_check)(char *oem_id, char *oem_table_id); 276 int (*apic_id_valid)(int apicid); 277 int (*apic_id_registered)(void); 278 279 u32 irq_delivery_mode; 280 u32 irq_dest_mode; 281 282 const struct cpumask *(*target_cpus)(void); 283 284 int disable_esr; 285 286 int dest_logical; 287 unsigned long (*check_apicid_used)(physid_mask_t *map, int apicid); 288 289 void (*vector_allocation_domain)(int cpu, struct cpumask *retmask, 290 const struct cpumask *mask); 291 void (*init_apic_ldr)(void); 292 293 void (*ioapic_phys_id_map)(physid_mask_t *phys_map, physid_mask_t *retmap); 294 295 void (*setup_apic_routing)(void); 296 int (*cpu_present_to_apicid)(int mps_cpu); 297 void (*apicid_to_cpu_present)(int phys_apicid, physid_mask_t *retmap); 298 int (*check_phys_apicid_present)(int phys_apicid); 299 int (*phys_pkg_id)(int cpuid_apic, int index_msb); 300 301 unsigned int (*get_apic_id)(unsigned long x); 302 unsigned long (*set_apic_id)(unsigned int id); 303 304 int (*cpu_mask_to_apicid_and)(const struct cpumask *cpumask, 305 const struct cpumask *andmask, 306 unsigned int *apicid); 307 308 /* ipi */ 309 void (*send_IPI)(int cpu, int vector); 310 void (*send_IPI_mask)(const struct cpumask *mask, int vector); 311 void (*send_IPI_mask_allbutself)(const struct cpumask *mask, 312 int vector); 313 void (*send_IPI_allbutself)(int vector); 314 void (*send_IPI_all)(int vector); 315 void (*send_IPI_self)(int vector); 316 317 /* wakeup_secondary_cpu */ 318 int (*wakeup_secondary_cpu)(int apicid, unsigned long start_eip); 319 320 void (*inquire_remote_apic)(int apicid); 321 322 /* apic ops */ 323 u32 (*read)(u32 reg); 324 void (*write)(u32 reg, u32 v); 325 /* 326 * ->eoi_write() has the same signature as ->write(). 327 * 328 * Drivers can support both ->eoi_write() and ->write() by passing the same 329 * callback value. Kernel can override ->eoi_write() and fall back 330 * on write for EOI. 331 */ 332 void (*eoi_write)(u32 reg, u32 v); 333 void (*native_eoi_write)(u32 reg, u32 v); 334 u64 (*icr_read)(void); 335 void (*icr_write)(u32 low, u32 high); 336 void (*wait_icr_idle)(void); 337 u32 (*safe_wait_icr_idle)(void); 338 339 #ifdef CONFIG_X86_32 340 /* 341 * Called very early during boot from get_smp_config(). It should 342 * return the logical apicid. x86_[bios]_cpu_to_apicid is 343 * initialized before this function is called. 344 * 345 * If logical apicid can't be determined that early, the function 346 * may return BAD_APICID. Logical apicid will be configured after 347 * init_apic_ldr() while bringing up CPUs. Note that NUMA affinity 348 * won't be applied properly during early boot in this case. 349 */ 350 int (*x86_32_early_logical_apicid)(int cpu); 351 #endif 352 }; 353 354 /* 355 * Pointer to the local APIC driver in use on this system (there's 356 * always just one such driver in use - the kernel decides via an 357 * early probing process which one it picks - and then sticks to it): 358 */ 359 extern struct apic *apic; 360 361 /* 362 * APIC drivers are probed based on how they are listed in the .apicdrivers 363 * section. So the order is important and enforced by the ordering 364 * of different apic driver files in the Makefile. 365 * 366 * For the files having two apic drivers, we use apic_drivers() 367 * to enforce the order with in them. 368 */ 369 #define apic_driver(sym) \ 370 static const struct apic *__apicdrivers_##sym __used \ 371 __aligned(sizeof(struct apic *)) \ 372 __section(.apicdrivers) = { &sym } 373 374 #define apic_drivers(sym1, sym2) \ 375 static struct apic *__apicdrivers_##sym1##sym2[2] __used \ 376 __aligned(sizeof(struct apic *)) \ 377 __section(.apicdrivers) = { &sym1, &sym2 } 378 379 extern struct apic *__apicdrivers[], *__apicdrivers_end[]; 380 381 /* 382 * APIC functionality to boot other CPUs - only used on SMP: 383 */ 384 #ifdef CONFIG_SMP 385 extern int wakeup_secondary_cpu_via_nmi(int apicid, unsigned long start_eip); 386 #endif 387 388 #ifdef CONFIG_X86_LOCAL_APIC 389 390 static inline u32 apic_read(u32 reg) 391 { 392 return apic->read(reg); 393 } 394 395 static inline void apic_write(u32 reg, u32 val) 396 { 397 apic->write(reg, val); 398 } 399 400 static inline void apic_eoi(void) 401 { 402 apic->eoi_write(APIC_EOI, APIC_EOI_ACK); 403 } 404 405 static inline u64 apic_icr_read(void) 406 { 407 return apic->icr_read(); 408 } 409 410 static inline void apic_icr_write(u32 low, u32 high) 411 { 412 apic->icr_write(low, high); 413 } 414 415 static inline void apic_wait_icr_idle(void) 416 { 417 apic->wait_icr_idle(); 418 } 419 420 static inline u32 safe_apic_wait_icr_idle(void) 421 { 422 return apic->safe_wait_icr_idle(); 423 } 424 425 extern void __init apic_set_eoi_write(void (*eoi_write)(u32 reg, u32 v)); 426 427 #else /* CONFIG_X86_LOCAL_APIC */ 428 429 static inline u32 apic_read(u32 reg) { return 0; } 430 static inline void apic_write(u32 reg, u32 val) { } 431 static inline void apic_eoi(void) { } 432 static inline u64 apic_icr_read(void) { return 0; } 433 static inline void apic_icr_write(u32 low, u32 high) { } 434 static inline void apic_wait_icr_idle(void) { } 435 static inline u32 safe_apic_wait_icr_idle(void) { return 0; } 436 static inline void apic_set_eoi_write(void (*eoi_write)(u32 reg, u32 v)) {} 437 438 #endif /* CONFIG_X86_LOCAL_APIC */ 439 440 static inline void ack_APIC_irq(void) 441 { 442 /* 443 * ack_APIC_irq() actually gets compiled as a single instruction 444 * ... yummie. 445 */ 446 apic_eoi(); 447 } 448 449 static inline unsigned default_get_apic_id(unsigned long x) 450 { 451 unsigned int ver = GET_APIC_VERSION(apic_read(APIC_LVR)); 452 453 if (APIC_XAPIC(ver) || boot_cpu_has(X86_FEATURE_EXTD_APICID)) 454 return (x >> 24) & 0xFF; 455 else 456 return (x >> 24) & 0x0F; 457 } 458 459 /* 460 * Warm reset vector position: 461 */ 462 #define TRAMPOLINE_PHYS_LOW 0x467 463 #define TRAMPOLINE_PHYS_HIGH 0x469 464 465 #ifdef CONFIG_X86_64 466 extern void apic_send_IPI_self(int vector); 467 468 DECLARE_PER_CPU(int, x2apic_extra_bits); 469 470 extern int default_cpu_present_to_apicid(int mps_cpu); 471 extern int default_check_phys_apicid_present(int phys_apicid); 472 #endif 473 474 extern void generic_bigsmp_probe(void); 475 476 477 #ifdef CONFIG_X86_LOCAL_APIC 478 479 #include <asm/smp.h> 480 481 #define APIC_DFR_VALUE (APIC_DFR_FLAT) 482 483 static inline const struct cpumask *default_target_cpus(void) 484 { 485 #ifdef CONFIG_SMP 486 return cpu_online_mask; 487 #else 488 return cpumask_of(0); 489 #endif 490 } 491 492 static inline const struct cpumask *online_target_cpus(void) 493 { 494 return cpu_online_mask; 495 } 496 497 DECLARE_EARLY_PER_CPU_READ_MOSTLY(u16, x86_bios_cpu_apicid); 498 499 500 static inline unsigned int read_apic_id(void) 501 { 502 unsigned int reg; 503 504 reg = apic_read(APIC_ID); 505 506 return apic->get_apic_id(reg); 507 } 508 509 static inline int default_apic_id_valid(int apicid) 510 { 511 return (apicid < 255); 512 } 513 514 extern int default_acpi_madt_oem_check(char *, char *); 515 516 extern void default_setup_apic_routing(void); 517 518 extern struct apic apic_noop; 519 520 #ifdef CONFIG_X86_32 521 522 static inline int noop_x86_32_early_logical_apicid(int cpu) 523 { 524 return BAD_APICID; 525 } 526 527 /* 528 * Set up the logical destination ID. 529 * 530 * Intel recommends to set DFR, LDR and TPR before enabling 531 * an APIC. See e.g. "AP-388 82489DX User's Manual" (Intel 532 * document number 292116). So here it goes... 533 */ 534 extern void default_init_apic_ldr(void); 535 536 static inline int default_apic_id_registered(void) 537 { 538 return physid_isset(read_apic_id(), phys_cpu_present_map); 539 } 540 541 static inline int default_phys_pkg_id(int cpuid_apic, int index_msb) 542 { 543 return cpuid_apic >> index_msb; 544 } 545 546 #endif 547 548 static inline int 549 flat_cpu_mask_to_apicid_and(const struct cpumask *cpumask, 550 const struct cpumask *andmask, 551 unsigned int *apicid) 552 { 553 unsigned long cpu_mask = cpumask_bits(cpumask)[0] & 554 cpumask_bits(andmask)[0] & 555 cpumask_bits(cpu_online_mask)[0] & 556 APIC_ALL_CPUS; 557 558 if (likely(cpu_mask)) { 559 *apicid = (unsigned int)cpu_mask; 560 return 0; 561 } else { 562 return -EINVAL; 563 } 564 } 565 566 extern int 567 default_cpu_mask_to_apicid_and(const struct cpumask *cpumask, 568 const struct cpumask *andmask, 569 unsigned int *apicid); 570 571 static inline void 572 flat_vector_allocation_domain(int cpu, struct cpumask *retmask, 573 const struct cpumask *mask) 574 { 575 /* Careful. Some cpus do not strictly honor the set of cpus 576 * specified in the interrupt destination when using lowest 577 * priority interrupt delivery mode. 578 * 579 * In particular there was a hyperthreading cpu observed to 580 * deliver interrupts to the wrong hyperthread when only one 581 * hyperthread was specified in the interrupt desitination. 582 */ 583 cpumask_clear(retmask); 584 cpumask_bits(retmask)[0] = APIC_ALL_CPUS; 585 } 586 587 static inline void 588 default_vector_allocation_domain(int cpu, struct cpumask *retmask, 589 const struct cpumask *mask) 590 { 591 cpumask_copy(retmask, cpumask_of(cpu)); 592 } 593 594 static inline unsigned long default_check_apicid_used(physid_mask_t *map, int apicid) 595 { 596 return physid_isset(apicid, *map); 597 } 598 599 static inline void default_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap) 600 { 601 *retmap = *phys_map; 602 } 603 604 static inline int __default_cpu_present_to_apicid(int mps_cpu) 605 { 606 if (mps_cpu < nr_cpu_ids && cpu_present(mps_cpu)) 607 return (int)per_cpu(x86_bios_cpu_apicid, mps_cpu); 608 else 609 return BAD_APICID; 610 } 611 612 static inline int 613 __default_check_phys_apicid_present(int phys_apicid) 614 { 615 return physid_isset(phys_apicid, phys_cpu_present_map); 616 } 617 618 #ifdef CONFIG_X86_32 619 static inline int default_cpu_present_to_apicid(int mps_cpu) 620 { 621 return __default_cpu_present_to_apicid(mps_cpu); 622 } 623 624 static inline int 625 default_check_phys_apicid_present(int phys_apicid) 626 { 627 return __default_check_phys_apicid_present(phys_apicid); 628 } 629 #else 630 extern int default_cpu_present_to_apicid(int mps_cpu); 631 extern int default_check_phys_apicid_present(int phys_apicid); 632 #endif 633 634 #endif /* CONFIG_X86_LOCAL_APIC */ 635 extern void irq_enter(void); 636 extern void irq_exit(void); 637 638 static inline void entering_irq(void) 639 { 640 irq_enter(); 641 } 642 643 static inline void entering_ack_irq(void) 644 { 645 entering_irq(); 646 ack_APIC_irq(); 647 } 648 649 static inline void ipi_entering_ack_irq(void) 650 { 651 irq_enter(); 652 ack_APIC_irq(); 653 } 654 655 static inline void exiting_irq(void) 656 { 657 irq_exit(); 658 } 659 660 static inline void exiting_ack_irq(void) 661 { 662 ack_APIC_irq(); 663 irq_exit(); 664 } 665 666 extern void ioapic_zap_locks(void); 667 668 #endif /* _ASM_X86_APIC_H */ 669