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 * Basic functions accessing APICs. 70 */ 71 #ifdef CONFIG_PARAVIRT 72 #include <asm/paravirt.h> 73 #else 74 #define setup_boot_clock setup_boot_APIC_clock 75 #define setup_secondary_clock setup_secondary_APIC_clock 76 #endif 77 78 #ifdef CONFIG_X86_VSMP 79 extern int is_vsmp_box(void); 80 #else 81 static inline int is_vsmp_box(void) 82 { 83 return 0; 84 } 85 #endif 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); 90 91 static inline void native_apic_mem_write(u32 reg, u32 v) 92 { 93 volatile u32 *addr = (volatile u32 *)(APIC_BASE + reg); 94 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))); 98 } 99 100 static inline u32 native_apic_mem_read(u32 reg) 101 { 102 return *((volatile u32 *)(APIC_BASE + reg)); 103 } 104 105 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); 109 110 #ifdef CONFIG_X86_X2APIC 111 static inline void native_apic_msr_write(u32 reg, u32 v) 112 { 113 if (reg == APIC_DFR || reg == APIC_ID || reg == APIC_LDR || 114 reg == APIC_LVR) 115 return; 116 117 wrmsr(APIC_BASE_MSR + (reg >> 4), v, 0); 118 } 119 120 static inline u32 native_apic_msr_read(u32 reg) 121 { 122 u32 low, high; 123 124 if (reg == APIC_DFR) 125 return -1; 126 127 rdmsr(APIC_BASE_MSR + (reg >> 4), low, high); 128 return low; 129 } 130 131 static inline void native_x2apic_wait_icr_idle(void) 132 { 133 /* no need to wait for icr idle in x2apic */ 134 return; 135 } 136 137 static inline u32 native_safe_x2apic_wait_icr_idle(void) 138 { 139 /* no need to wait for icr idle in x2apic */ 140 return 0; 141 } 142 143 static inline void native_x2apic_icr_write(u32 low, u32 id) 144 { 145 wrmsrl(APIC_BASE_MSR + (APIC_ICR >> 4), ((__u64) id) << 32 | low); 146 } 147 148 static inline u64 native_x2apic_icr_read(void) 149 { 150 unsigned long val; 151 152 rdmsrl(APIC_BASE_MSR + (APIC_ICR >> 4), val); 153 return val; 154 } 155 156 extern int x2apic, x2apic_phys; 157 extern void check_x2apic(void); 158 extern void enable_x2apic(void); 159 extern void enable_IR_x2apic(void); 160 extern void x2apic_icr_write(u32 low, u32 id); 161 static inline int x2apic_enabled(void) 162 { 163 int msr, msr2; 164 165 if (!cpu_has_x2apic) 166 return 0; 167 168 rdmsr(MSR_IA32_APICBASE, msr, msr2); 169 if (msr & X2APIC_ENABLE) 170 return 1; 171 return 0; 172 } 173 #else 174 static inline void check_x2apic(void) 175 { 176 } 177 static inline void enable_x2apic(void) 178 { 179 } 180 static inline void enable_IR_x2apic(void) 181 { 182 } 183 static inline int x2apic_enabled(void) 184 { 185 return 0; 186 } 187 188 #define x2apic 0 189 190 #endif 191 192 extern int get_physical_broadcast(void); 193 194 #ifdef CONFIG_X86_X2APIC 195 static inline void ack_x2APIC_irq(void) 196 { 197 /* Docs say use 0 for future compatibility */ 198 native_apic_msr_write(APIC_EOI, 0); 199 } 200 #endif 201 202 extern int lapic_get_maxlvt(void); 203 extern void clear_local_APIC(void); 204 extern void connect_bsp_APIC(void); 205 extern void disconnect_bsp_APIC(int virt_wire_setup); 206 extern void disable_local_APIC(void); 207 extern void lapic_shutdown(void); 208 extern int verify_local_APIC(void); 209 extern void cache_APIC_registers(void); 210 extern void sync_Arb_IDs(void); 211 extern void init_bsp_APIC(void); 212 extern void setup_local_APIC(void); 213 extern void end_local_APIC_setup(void); 214 extern void init_apic_mappings(void); 215 extern void setup_boot_APIC_clock(void); 216 extern void setup_secondary_APIC_clock(void); 217 extern int APIC_init_uniprocessor(void); 218 extern void enable_NMI_through_LVT0(void); 219 220 /* 221 * On 32bit this is mach-xxx local 222 */ 223 #ifdef CONFIG_X86_64 224 extern void early_init_lapic_mapping(void); 225 extern int apic_is_clustered_box(void); 226 #else 227 static inline int apic_is_clustered_box(void) 228 { 229 return 0; 230 } 231 #endif 232 233 extern u8 setup_APIC_eilvt_mce(u8 vector, u8 msg_type, u8 mask); 234 extern u8 setup_APIC_eilvt_ibs(u8 vector, u8 msg_type, u8 mask); 235 236 237 #else /* !CONFIG_X86_LOCAL_APIC */ 238 static inline void lapic_shutdown(void) { } 239 #define local_apic_timer_c2_ok 1 240 static inline void init_apic_mappings(void) { } 241 static inline void disable_local_APIC(void) { } 242 243 #endif /* !CONFIG_X86_LOCAL_APIC */ 244 245 #ifdef CONFIG_X86_64 246 #define SET_APIC_ID(x) (apic->set_apic_id(x)) 247 #else 248 249 #endif 250 251 /* 252 * Copyright 2004 James Cleverdon, IBM. 253 * Subject to the GNU Public License, v.2 254 * 255 * Generic APIC sub-arch data struct. 256 * 257 * Hacked for x86-64 by James Cleverdon from i386 architecture code by 258 * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and 259 * James Cleverdon. 260 */ 261 struct apic { 262 char *name; 263 264 int (*probe)(void); 265 int (*acpi_madt_oem_check)(char *oem_id, char *oem_table_id); 266 int (*apic_id_registered)(void); 267 268 u32 irq_delivery_mode; 269 u32 irq_dest_mode; 270 271 const struct cpumask *(*target_cpus)(void); 272 273 int disable_esr; 274 275 int dest_logical; 276 unsigned long (*check_apicid_used)(physid_mask_t bitmap, int apicid); 277 unsigned long (*check_apicid_present)(int apicid); 278 279 void (*vector_allocation_domain)(int cpu, struct cpumask *retmask); 280 void (*init_apic_ldr)(void); 281 282 physid_mask_t (*ioapic_phys_id_map)(physid_mask_t map); 283 284 void (*setup_apic_routing)(void); 285 int (*multi_timer_check)(int apic, int irq); 286 int (*apicid_to_node)(int logical_apicid); 287 int (*cpu_to_logical_apicid)(int cpu); 288 int (*cpu_present_to_apicid)(int mps_cpu); 289 physid_mask_t (*apicid_to_cpu_present)(int phys_apicid); 290 void (*setup_portio_remap)(void); 291 int (*check_phys_apicid_present)(int boot_cpu_physical_apicid); 292 void (*enable_apic_mode)(void); 293 int (*phys_pkg_id)(int cpuid_apic, int index_msb); 294 295 /* 296 * When one of the next two hooks returns 1 the apic 297 * is switched to this. Essentially they are additional 298 * probe functions: 299 */ 300 int (*mps_oem_check)(struct mpc_table *mpc, char *oem, char *productid); 301 302 unsigned int (*get_apic_id)(unsigned long x); 303 unsigned long (*set_apic_id)(unsigned int id); 304 unsigned long apic_id_mask; 305 306 unsigned int (*cpu_mask_to_apicid)(const struct cpumask *cpumask); 307 unsigned int (*cpu_mask_to_apicid_and)(const struct cpumask *cpumask, 308 const struct cpumask *andmask); 309 310 /* ipi */ 311 void (*send_IPI_mask)(const struct cpumask *mask, int vector); 312 void (*send_IPI_mask_allbutself)(const struct cpumask *mask, 313 int vector); 314 void (*send_IPI_allbutself)(int vector); 315 void (*send_IPI_all)(int vector); 316 void (*send_IPI_self)(int vector); 317 318 /* wakeup_secondary_cpu */ 319 int (*wakeup_secondary_cpu)(int apicid, unsigned long start_eip); 320 321 int trampoline_phys_low; 322 int trampoline_phys_high; 323 324 void (*wait_for_init_deassert)(atomic_t *deassert); 325 void (*smp_callin_clear_local_apic)(void); 326 void (*inquire_remote_apic)(int apicid); 327 328 /* apic ops */ 329 u32 (*read)(u32 reg); 330 void (*write)(u32 reg, u32 v); 331 u64 (*icr_read)(void); 332 void (*icr_write)(u32 low, u32 high); 333 void (*wait_icr_idle)(void); 334 u32 (*safe_wait_icr_idle)(void); 335 }; 336 337 /* 338 * Pointer to the local APIC driver in use on this system (there's 339 * always just one such driver in use - the kernel decides via an 340 * early probing process which one it picks - and then sticks to it): 341 */ 342 extern struct apic *apic; 343 344 /* 345 * APIC functionality to boot other CPUs - only used on SMP: 346 */ 347 #ifdef CONFIG_SMP 348 extern atomic_t init_deasserted; 349 extern int wakeup_secondary_cpu_via_nmi(int apicid, unsigned long start_eip); 350 #endif 351 352 static inline u32 apic_read(u32 reg) 353 { 354 return apic->read(reg); 355 } 356 357 static inline void apic_write(u32 reg, u32 val) 358 { 359 apic->write(reg, val); 360 } 361 362 static inline u64 apic_icr_read(void) 363 { 364 return apic->icr_read(); 365 } 366 367 static inline void apic_icr_write(u32 low, u32 high) 368 { 369 apic->icr_write(low, high); 370 } 371 372 static inline void apic_wait_icr_idle(void) 373 { 374 apic->wait_icr_idle(); 375 } 376 377 static inline u32 safe_apic_wait_icr_idle(void) 378 { 379 return apic->safe_wait_icr_idle(); 380 } 381 382 383 static inline void ack_APIC_irq(void) 384 { 385 #ifdef CONFIG_X86_LOCAL_APIC 386 /* 387 * ack_APIC_irq() actually gets compiled as a single instruction 388 * ... yummie. 389 */ 390 391 /* Docs say use 0 for future compatibility */ 392 apic_write(APIC_EOI, 0); 393 #endif 394 } 395 396 static inline unsigned default_get_apic_id(unsigned long x) 397 { 398 unsigned int ver = GET_APIC_VERSION(apic_read(APIC_LVR)); 399 400 if (APIC_XAPIC(ver)) 401 return (x >> 24) & 0xFF; 402 else 403 return (x >> 24) & 0x0F; 404 } 405 406 /* 407 * Warm reset vector default position: 408 */ 409 #define DEFAULT_TRAMPOLINE_PHYS_LOW 0x467 410 #define DEFAULT_TRAMPOLINE_PHYS_HIGH 0x469 411 412 #ifdef CONFIG_X86_64 413 extern struct apic apic_flat; 414 extern struct apic apic_physflat; 415 extern struct apic apic_x2apic_cluster; 416 extern struct apic apic_x2apic_phys; 417 extern int default_acpi_madt_oem_check(char *, char *); 418 419 extern void apic_send_IPI_self(int vector); 420 421 extern struct apic apic_x2apic_uv_x; 422 DECLARE_PER_CPU(int, x2apic_extra_bits); 423 424 extern int default_cpu_present_to_apicid(int mps_cpu); 425 extern int default_check_phys_apicid_present(int boot_cpu_physical_apicid); 426 #endif 427 428 static inline void default_wait_for_init_deassert(atomic_t *deassert) 429 { 430 while (!atomic_read(deassert)) 431 cpu_relax(); 432 return; 433 } 434 435 extern void generic_bigsmp_probe(void); 436 437 438 #ifdef CONFIG_X86_LOCAL_APIC 439 440 #include <asm/smp.h> 441 442 #define APIC_DFR_VALUE (APIC_DFR_FLAT) 443 444 static inline const struct cpumask *default_target_cpus(void) 445 { 446 #ifdef CONFIG_SMP 447 return cpu_online_mask; 448 #else 449 return cpumask_of(0); 450 #endif 451 } 452 453 DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid); 454 455 456 static inline unsigned int read_apic_id(void) 457 { 458 unsigned int reg; 459 460 reg = apic_read(APIC_ID); 461 462 return apic->get_apic_id(reg); 463 } 464 465 extern void default_setup_apic_routing(void); 466 467 #ifdef CONFIG_X86_32 468 /* 469 * Set up the logical destination ID. 470 * 471 * Intel recommends to set DFR, LDR and TPR before enabling 472 * an APIC. See e.g. "AP-388 82489DX User's Manual" (Intel 473 * document number 292116). So here it goes... 474 */ 475 extern void default_init_apic_ldr(void); 476 477 static inline int default_apic_id_registered(void) 478 { 479 return physid_isset(read_apic_id(), phys_cpu_present_map); 480 } 481 482 static inline unsigned int 483 default_cpu_mask_to_apicid(const struct cpumask *cpumask) 484 { 485 return cpumask_bits(cpumask)[0]; 486 } 487 488 static inline unsigned int 489 default_cpu_mask_to_apicid_and(const struct cpumask *cpumask, 490 const struct cpumask *andmask) 491 { 492 unsigned long mask1 = cpumask_bits(cpumask)[0]; 493 unsigned long mask2 = cpumask_bits(andmask)[0]; 494 unsigned long mask3 = cpumask_bits(cpu_online_mask)[0]; 495 496 return (unsigned int)(mask1 & mask2 & mask3); 497 } 498 499 static inline int default_phys_pkg_id(int cpuid_apic, int index_msb) 500 { 501 return cpuid_apic >> index_msb; 502 } 503 504 extern int default_apicid_to_node(int logical_apicid); 505 506 #endif 507 508 static inline unsigned long default_check_apicid_used(physid_mask_t bitmap, int apicid) 509 { 510 return physid_isset(apicid, bitmap); 511 } 512 513 static inline unsigned long default_check_apicid_present(int bit) 514 { 515 return physid_isset(bit, phys_cpu_present_map); 516 } 517 518 static inline physid_mask_t default_ioapic_phys_id_map(physid_mask_t phys_map) 519 { 520 return phys_map; 521 } 522 523 /* Mapping from cpu number to logical apicid */ 524 static inline int default_cpu_to_logical_apicid(int cpu) 525 { 526 return 1 << cpu; 527 } 528 529 static inline int __default_cpu_present_to_apicid(int mps_cpu) 530 { 531 if (mps_cpu < nr_cpu_ids && cpu_present(mps_cpu)) 532 return (int)per_cpu(x86_bios_cpu_apicid, mps_cpu); 533 else 534 return BAD_APICID; 535 } 536 537 static inline int 538 __default_check_phys_apicid_present(int boot_cpu_physical_apicid) 539 { 540 return physid_isset(boot_cpu_physical_apicid, phys_cpu_present_map); 541 } 542 543 #ifdef CONFIG_X86_32 544 static inline int default_cpu_present_to_apicid(int mps_cpu) 545 { 546 return __default_cpu_present_to_apicid(mps_cpu); 547 } 548 549 static inline int 550 default_check_phys_apicid_present(int boot_cpu_physical_apicid) 551 { 552 return __default_check_phys_apicid_present(boot_cpu_physical_apicid); 553 } 554 #else 555 extern int default_cpu_present_to_apicid(int mps_cpu); 556 extern int default_check_phys_apicid_present(int boot_cpu_physical_apicid); 557 #endif 558 559 static inline physid_mask_t default_apicid_to_cpu_present(int phys_apicid) 560 { 561 return physid_mask_of_physid(phys_apicid); 562 } 563 564 #endif /* CONFIG_X86_LOCAL_APIC */ 565 566 #ifdef CONFIG_X86_32 567 extern u8 cpu_2_logical_apicid[NR_CPUS]; 568 #endif 569 570 #endif /* _ASM_X86_APIC_H */ 571