1 /* $NetBSD: cpu.h,v 1.66 2014/02/23 22:38:40 dsl Exp $ */ 2 3 /*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)cpu.h 5.4 (Berkeley) 5/9/91 35 */ 36 37 #ifndef _X86_CPU_H_ 38 #define _X86_CPU_H_ 39 40 #if defined(_KERNEL) || defined(_STANDALONE) 41 #include <sys/types.h> 42 #else 43 #include <stdint.h> 44 #include <stdbool.h> 45 #endif /* _KERNEL || _STANDALONE */ 46 47 #if defined(_KERNEL) || defined(_KMEMUSER) 48 #if defined(_KERNEL_OPT) 49 #include "opt_xen.h" 50 #ifdef i386 51 #include "opt_user_ldt.h" 52 #include "opt_vm86.h" 53 #endif 54 #endif 55 56 /* 57 * Definitions unique to x86 cpu support. 58 */ 59 #include <machine/frame.h> 60 #include <machine/pte.h> 61 #include <machine/segments.h> 62 #include <machine/tss.h> 63 #include <machine/intrdefs.h> 64 65 #include <x86/cacheinfo.h> 66 67 #include <sys/cpu_data.h> 68 #include <sys/evcnt.h> 69 #include <sys/device_if.h> /* for device_t */ 70 71 #ifdef XEN 72 #include <xen/xen-public/xen.h> 73 #include <xen/xen-public/event_channel.h> 74 #include <sys/mutex.h> 75 #endif /* XEN */ 76 77 struct intrsource; 78 struct pmap; 79 80 #ifdef __x86_64__ 81 #define i386tss x86_64_tss 82 #endif 83 84 #define NIOPORTS 1024 /* # of ports we allow to be mapped */ 85 #define IOMAPSIZE (NIOPORTS / 8) /* I/O bitmap size in bytes */ 86 87 /* 88 * a bunch of this belongs in cpuvar.h; move it later.. 89 */ 90 91 struct cpu_info { 92 struct cpu_data ci_data; /* MI per-cpu data */ 93 device_t ci_dev; /* pointer to our device */ 94 struct cpu_info *ci_self; /* self-pointer */ 95 volatile struct vcpu_info *ci_vcpu; /* for XEN */ 96 void *ci_tlog_base; /* Trap log base */ 97 int32_t ci_tlog_offset; /* Trap log current offset */ 98 99 /* 100 * Will be accessed by other CPUs. 101 */ 102 struct cpu_info *ci_next; /* next cpu */ 103 struct lwp *ci_curlwp; /* current owner of the processor */ 104 struct lwp *ci_fpcurlwp; /* current owner of the FPU */ 105 int _unused1[2]; 106 cpuid_t ci_cpuid; /* our CPU ID */ 107 int _unused; 108 uint32_t ci_acpiid; /* our ACPI/MADT ID */ 109 uint32_t ci_initapicid; /* our intitial APIC ID */ 110 111 /* 112 * Private members. 113 */ 114 struct evcnt ci_tlb_evcnt; /* tlb shootdown counter */ 115 struct pmap *ci_pmap; /* current pmap */ 116 int ci_need_tlbwait; /* need to wait for TLB invalidations */ 117 int ci_want_pmapload; /* pmap_load() is needed */ 118 volatile int ci_tlbstate; /* one of TLBSTATE_ states. see below */ 119 #define TLBSTATE_VALID 0 /* all user tlbs are valid */ 120 #define TLBSTATE_LAZY 1 /* tlbs are valid but won't be kept uptodate */ 121 #define TLBSTATE_STALE 2 /* we might have stale user tlbs */ 122 int ci_curldt; /* current LDT descriptor */ 123 int ci_nintrhand; /* number of H/W interrupt handlers */ 124 uint64_t ci_scratch; 125 uintptr_t ci_pmap_data[128 / sizeof(uintptr_t)]; 126 127 #ifdef XEN 128 struct iplsource *ci_isources[NIPL]; 129 u_long ci_evtmask[NR_EVENT_CHANNELS]; /* events allowed on this CPU */ 130 #else 131 struct intrsource *ci_isources[MAX_INTR_SOURCES]; 132 #endif 133 volatile int ci_mtx_count; /* Negative count of spin mutexes */ 134 volatile int ci_mtx_oldspl; /* Old SPL at this ci_idepth */ 135 136 /* The following must be aligned for cmpxchg8b. */ 137 struct { 138 uint32_t ipending; 139 int ilevel; 140 } ci_istate __aligned(8); 141 #define ci_ipending ci_istate.ipending 142 #define ci_ilevel ci_istate.ilevel 143 144 int ci_idepth; 145 void * ci_intrstack; 146 uint32_t ci_imask[NIPL]; 147 uint32_t ci_iunmask[NIPL]; 148 149 uint32_t ci_flags; /* flags; see below */ 150 uint32_t ci_ipis; /* interprocessor interrupts pending */ 151 uint32_t sc_apic_version; /* local APIC version */ 152 153 uint32_t ci_signature; /* X86 cpuid type (cpuid.1.%eax) */ 154 uint32_t ci_vendor[4]; /* vendor string */ 155 uint32_t _unused2; 156 uint32_t ci_max_cpuid; /* cpuid.0:%eax */ 157 uint32_t ci_max_ext_cpuid; /* cpuid.80000000:%eax */ 158 volatile uint32_t ci_lapic_counter; 159 160 uint32_t ci_feat_val[5]; /* X86 CPUID feature bits */ 161 /* [0] basic features cpuid.1:%edx 162 * [1] basic features cpuid.1:%ecx (CPUID2_xxx bits) 163 * [2] extended features cpuid:80000001:%edx 164 * [3] extended features cpuid:80000001:%ecx 165 * [4] VIA padlock features 166 */ 167 168 const struct cpu_functions *ci_func; /* start/stop functions */ 169 struct trapframe *ci_ddb_regs; 170 171 u_int ci_cflush_lsize; /* CFLUSH insn line size */ 172 struct x86_cache_info ci_cinfo[CAI_COUNT]; 173 174 union descriptor *ci_gdt; 175 176 #ifdef i386 177 struct i386tss ci_doubleflt_tss; 178 struct i386tss ci_ddbipi_tss; 179 #endif 180 181 #ifdef PAE 182 uint32_t ci_pae_l3_pdirpa; /* PA of L3 PD */ 183 pd_entry_t * ci_pae_l3_pdir; /* VA pointer to L3 PD */ 184 #endif 185 186 #if defined(XEN) && (defined(PAE) || defined(__x86_64__)) 187 /* Currently active user PGD (can't use rcr3() with Xen) */ 188 pd_entry_t * ci_kpm_pdir; /* per-cpu PMD (va) */ 189 paddr_t ci_kpm_pdirpa; /* per-cpu PMD (pa) */ 190 kmutex_t ci_kpm_mtx; 191 #if defined(__x86_64__) 192 /* per-cpu version of normal_pdes */ 193 pd_entry_t * ci_normal_pdes[3]; /* Ok to hardcode. only for x86_64 && XEN */ 194 paddr_t ci_xen_current_user_pgd; 195 #endif /* __x86_64__ */ 196 #endif /* XEN et.al */ 197 198 char *ci_doubleflt_stack; 199 char *ci_ddbipi_stack; 200 201 #ifndef XEN 202 struct evcnt ci_ipi_events[X86_NIPI]; 203 #else /* XEN */ 204 struct evcnt ci_ipi_events[XEN_NIPIS]; 205 evtchn_port_t ci_ipi_evtchn; 206 #endif /* XEN */ 207 208 device_t ci_frequency; /* Frequency scaling technology */ 209 device_t ci_padlock; /* VIA PadLock private storage */ 210 device_t ci_temperature; /* Intel coretemp(4) or equivalent */ 211 device_t ci_vm; /* Virtual machine guest driver */ 212 213 struct i386tss ci_tss; /* Per-cpu TSS; shared among LWPs */ 214 char ci_iomap[IOMAPSIZE]; /* I/O Bitmap */ 215 int ci_tss_sel; /* TSS selector of this cpu */ 216 217 /* 218 * The following two are actually region_descriptors, 219 * but that would pollute the namespace. 220 */ 221 uintptr_t ci_suspend_gdt; 222 uint16_t ci_suspend_gdt_padding; 223 uintptr_t ci_suspend_idt; 224 uint16_t ci_suspend_idt_padding; 225 226 uint16_t ci_suspend_tr; 227 uint16_t ci_suspend_ldt; 228 uintptr_t ci_suspend_fs; 229 uintptr_t ci_suspend_gs; 230 uintptr_t ci_suspend_kgs; 231 uintptr_t ci_suspend_efer; 232 uintptr_t ci_suspend_reg[12]; 233 uintptr_t ci_suspend_cr0; 234 uintptr_t ci_suspend_cr2; 235 uintptr_t ci_suspend_cr3; 236 uintptr_t ci_suspend_cr4; 237 uintptr_t ci_suspend_cr8; 238 239 /* The following must be in a single cache line. */ 240 int ci_want_resched __aligned(64); 241 int ci_padout __aligned(64); 242 }; 243 244 /* 245 * Macros to handle (some) trapframe registers for common x86 code. 246 */ 247 #ifdef __x86_64__ 248 #define X86_TF_RAX(tf) tf->tf_rax 249 #define X86_TF_RDX(tf) tf->tf_rdx 250 #define X86_TF_RSP(tf) tf->tf_rsp 251 #define X86_TF_RIP(tf) tf->tf_rip 252 #define X86_TF_RFLAGS(tf) tf->tf_rflags 253 #else 254 #define X86_TF_RAX(tf) tf->tf_eax 255 #define X86_TF_RDX(tf) tf->tf_edx 256 #define X86_TF_RSP(tf) tf->tf_esp 257 #define X86_TF_RIP(tf) tf->tf_eip 258 #define X86_TF_RFLAGS(tf) tf->tf_eflags 259 #endif 260 261 /* 262 * Processor flag notes: The "primary" CPU has certain MI-defined 263 * roles (mostly relating to hardclock handling); we distinguish 264 * betwen the processor which booted us, and the processor currently 265 * holding the "primary" role just to give us the flexibility later to 266 * change primaries should we be sufficiently twisted. 267 */ 268 269 #define CPUF_BSP 0x0001 /* CPU is the original BSP */ 270 #define CPUF_AP 0x0002 /* CPU is an AP */ 271 #define CPUF_SP 0x0004 /* CPU is only processor */ 272 #define CPUF_PRIMARY 0x0008 /* CPU is active primary processor */ 273 274 #define CPUF_SYNCTSC 0x0800 /* Synchronize TSC */ 275 #define CPUF_PRESENT 0x1000 /* CPU is present */ 276 #define CPUF_RUNNING 0x2000 /* CPU is running */ 277 #define CPUF_PAUSE 0x4000 /* CPU is paused in DDB */ 278 #define CPUF_GO 0x8000 /* CPU should start running */ 279 280 #endif /* _KERNEL || __KMEMUSER */ 281 282 #ifdef _KERNEL 283 /* 284 * We statically allocate the CPU info for the primary CPU (or, 285 * the only CPU on uniprocessors), and the primary CPU is the 286 * first CPU on the CPU info list. 287 */ 288 extern struct cpu_info cpu_info_primary; 289 extern struct cpu_info *cpu_info_list; 290 291 #define CPU_INFO_ITERATOR int __unused 292 #define CPU_INFO_FOREACH(cii, ci) ci = cpu_info_list; \ 293 ci != NULL; ci = ci->ci_next 294 295 #define CPU_STARTUP(_ci, _target) ((_ci)->ci_func->start(_ci, _target)) 296 #define CPU_STOP(_ci) ((_ci)->ci_func->stop(_ci)) 297 #define CPU_START_CLEANUP(_ci) ((_ci)->ci_func->cleanup(_ci)) 298 299 #if !defined(__GNUC__) || defined(_MODULE) 300 /* For non-GCC and modules */ 301 struct cpu_info *x86_curcpu(void); 302 void cpu_set_curpri(int); 303 # ifdef __GNUC__ 304 lwp_t *x86_curlwp(void) __attribute__ ((const)); 305 # else 306 lwp_t *x86_curlwp(void); 307 # endif 308 #endif 309 310 #define cpu_number() (cpu_index(curcpu())) 311 312 #define CPU_IS_PRIMARY(ci) ((ci)->ci_flags & CPUF_PRIMARY) 313 314 #define X86_AST_GENERIC 0x01 315 #define X86_AST_PREEMPT 0x02 316 317 #define aston(l, why) ((l)->l_md.md_astpending |= (why)) 318 #define cpu_did_resched(l) ((l)->l_md.md_astpending &= ~X86_AST_PREEMPT) 319 320 void cpu_boot_secondary_processors(void); 321 void cpu_init_idle_lwps(void); 322 void cpu_init_msrs(struct cpu_info *, bool); 323 void cpu_load_pmap(struct pmap *, struct pmap *); 324 void cpu_broadcast_halt(void); 325 void cpu_kick(struct cpu_info *); 326 327 #define curcpu() x86_curcpu() 328 #define curlwp x86_curlwp() 329 #define curpcb ((struct pcb *)lwp_getpcb(curlwp)) 330 331 /* 332 * Arguments to hardclock, softclock and statclock 333 * encapsulate the previous machine state in an opaque 334 * clockframe; for now, use generic intrframe. 335 */ 336 struct clockframe { 337 struct intrframe cf_if; 338 }; 339 340 /* 341 * Give a profiling tick to the current process when the user profiling 342 * buffer pages are invalid. On the i386, request an ast to send us 343 * through trap(), marking the proc as needing a profiling tick. 344 */ 345 extern void cpu_need_proftick(struct lwp *l); 346 347 /* 348 * Notify the LWP l that it has a signal pending, process as soon as 349 * possible. 350 */ 351 extern void cpu_signotify(struct lwp *); 352 353 /* 354 * We need a machine-independent name for this. 355 */ 356 extern void (*delay_func)(unsigned int); 357 struct timeval; 358 359 #define DELAY(x) (*delay_func)(x) 360 #define delay(x) (*delay_func)(x) 361 362 extern int biosbasemem; 363 extern int biosextmem; 364 extern int cputype; 365 extern int cpuid_level; 366 extern int cpu_class; 367 extern char cpu_brand_string[]; 368 extern int use_pae; 369 370 #ifdef __i386__ 371 extern int i386_fpu_present; 372 int npx586bug1(int, int); 373 extern int i386_fpu_fdivbug; 374 extern int i386_use_fxsave; 375 extern int i386_has_sse; 376 extern int i386_has_sse2; 377 #else 378 #define i386_fpu_present 1 379 #define i386_fpu_fdivbug 0 380 #define i386_use_fxsave 1 381 #define i386_has_sse 1 382 #define i386_has_sse2 1 383 #endif 384 385 extern int x86_fpu_save; 386 #define FPU_SAVE_FSAVE 0 387 #define FPU_SAVE_FXSAVE 1 388 #define FPU_SAVE_XSAVE 2 389 #define FPU_SAVE_XSAVEOPT 3 390 extern unsigned int x86_fpu_save_size; 391 extern uint64_t x86_xsave_features; 392 393 extern void (*x86_cpu_idle)(void); 394 #define cpu_idle() (*x86_cpu_idle)() 395 396 /* machdep.c */ 397 void dumpconf(void); 398 void cpu_reset(void); 399 void i386_proc0_tss_ldt_init(void); 400 void dumpconf(void); 401 void cpu_reset(void); 402 void x86_64_proc0_tss_ldt_init(void); 403 void x86_64_init_pcb_tss_ldt(struct cpu_info *); 404 405 /* longrun.c */ 406 u_int tmx86_get_longrun_mode(void); 407 void tmx86_get_longrun_status(u_int *, u_int *, u_int *); 408 void tmx86_init_longrun(void); 409 410 /* identcpu.c */ 411 void cpu_probe(struct cpu_info *); 412 void cpu_identify(struct cpu_info *); 413 414 /* cpu_topology.c */ 415 void x86_cpu_topology(struct cpu_info *); 416 417 /* vm_machdep.c */ 418 void cpu_proc_fork(struct proc *, struct proc *); 419 420 /* locore.s */ 421 struct region_descriptor; 422 void lgdt(struct region_descriptor *); 423 #ifdef XEN 424 void lgdt_finish(void); 425 #endif 426 427 struct pcb; 428 void savectx(struct pcb *); 429 void lwp_trampoline(void); 430 #ifdef XEN 431 void startrtclock(void); 432 void xen_delay(unsigned int); 433 void xen_initclocks(void); 434 void xen_suspendclocks(struct cpu_info *); 435 void xen_resumeclocks(struct cpu_info *); 436 #else 437 /* clock.c */ 438 void initrtclock(u_long); 439 void startrtclock(void); 440 void i8254_delay(unsigned int); 441 void i8254_microtime(struct timeval *); 442 void i8254_initclocks(void); 443 #endif 444 445 /* cpu.c */ 446 447 void cpu_probe_features(struct cpu_info *); 448 449 /* vm_machdep.c */ 450 paddr_t kvtop(void *); 451 452 #ifdef USER_LDT 453 /* sys_machdep.h */ 454 int x86_get_ldt(struct lwp *, void *, register_t *); 455 int x86_set_ldt(struct lwp *, void *, register_t *); 456 #endif 457 458 /* isa_machdep.c */ 459 void isa_defaultirq(void); 460 int isa_nmi(void); 461 462 #ifdef VM86 463 /* vm86.c */ 464 void vm86_gpfault(struct lwp *, int); 465 #endif /* VM86 */ 466 467 /* consinit.c */ 468 void kgdb_port_init(void); 469 470 /* bus_machdep.c */ 471 void x86_bus_space_init(void); 472 void x86_bus_space_mallocok(void); 473 474 #endif /* _KERNEL */ 475 476 #if defined(_KERNEL) || defined(_KMEMUSER) 477 #include <machine/psl.h> /* Must be after struct cpu_info declaration */ 478 #endif /* _KERNEL || __KMEMUSER */ 479 480 /* 481 * CTL_MACHDEP definitions. 482 */ 483 #define CPU_CONSDEV 1 /* dev_t: console terminal device */ 484 #define CPU_BIOSBASEMEM 2 /* int: bios-reported base mem (K) */ 485 #define CPU_BIOSEXTMEM 3 /* int: bios-reported ext. mem (K) */ 486 /* CPU_NKPDE 4 obsolete: int: number of kernel PDEs */ 487 #define CPU_BOOTED_KERNEL 5 /* string: booted kernel name */ 488 #define CPU_DISKINFO 6 /* struct disklist *: 489 * disk geometry information */ 490 #define CPU_FPU_PRESENT 7 /* int: FPU is present */ 491 #define CPU_OSFXSR 8 /* int: OS uses FXSAVE/FXRSTOR */ 492 #define CPU_SSE 9 /* int: OS/CPU supports SSE */ 493 #define CPU_SSE2 10 /* int: OS/CPU supports SSE2 */ 494 #define CPU_TMLR_MODE 11 /* int: longrun mode 495 * 0: minimum frequency 496 * 1: economy 497 * 2: performance 498 * 3: maximum frequency 499 */ 500 #define CPU_TMLR_FREQUENCY 12 /* int: current frequency */ 501 #define CPU_TMLR_VOLTAGE 13 /* int: curret voltage */ 502 #define CPU_TMLR_PERCENTAGE 14 /* int: current clock percentage */ 503 #define CPU_MAXID 15 /* number of valid machdep ids */ 504 505 /* 506 * Structure for CPU_DISKINFO sysctl call. 507 * XXX this should be somewhere else. 508 */ 509 #define MAX_BIOSDISKS 16 510 511 struct disklist { 512 int dl_nbiosdisks; /* number of bios disks */ 513 struct biosdisk_info { 514 int bi_dev; /* BIOS device # (0x80 ..) */ 515 int bi_cyl; /* cylinders on disk */ 516 int bi_head; /* heads per track */ 517 int bi_sec; /* sectors per track */ 518 uint64_t bi_lbasecs; /* total sec. (iff ext13) */ 519 #define BIFLAG_INVALID 0x01 520 #define BIFLAG_EXTINT13 0x02 521 int bi_flags; 522 } dl_biosdisks[MAX_BIOSDISKS]; 523 524 int dl_nnativedisks; /* number of native disks */ 525 struct nativedisk_info { 526 char ni_devname[16]; /* native device name */ 527 int ni_nmatches; /* # of matches w/ BIOS */ 528 int ni_biosmatches[MAX_BIOSDISKS]; /* indices in dl_biosdisks */ 529 } dl_nativedisks[1]; /* actually longer */ 530 }; 531 #endif /* !_X86_CPU_H_ */ 532