sys/arm64/arm64/machdep.c

   1 /*-
   2  * Copyright (c) 2014 Andrew Turner
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  */
  27
  28 #include "opt_platform.h"
  29 #include "opt_ddb.h"
  30
  31 #include <sys/cdefs.h>
  32 __FBSDID("$FreeBSD$");
  33
  34 #include <sys/param.h>
  35 #include <sys/systm.h>
  36 #include <sys/buf.h>
  37 #include <sys/bus.h>
  38 #include <sys/cons.h>
  39 #include <sys/cpu.h>
  40 #include <sys/efi.h>
  41 #include <sys/exec.h>
  42 #include <sys/imgact.h>
  43 #include <sys/kdb.h>
  44 #include <sys/kernel.h>
  45 #include <sys/limits.h>
  46 #include <sys/linker.h>
  47 #include <sys/msgbuf.h>
  48 #include <sys/pcpu.h>
  49 #include <sys/proc.h>
  50 #include <sys/ptrace.h>
  51 #include <sys/reboot.h>
  52 #include <sys/rwlock.h>
  53 #include <sys/sched.h>
  54 #include <sys/signalvar.h>
  55 #include <sys/syscallsubr.h>
  56 #include <sys/sysent.h>
  57 #include <sys/sysproto.h>
  58 #include <sys/ucontext.h>
  59 #include <sys/vdso.h>
  60
  61 #include <vm/vm.h>
  62 #include <vm/vm_kern.h>
  63 #include <vm/vm_object.h>
  64 #include <vm/vm_page.h>
  65 #include <vm/pmap.h>
  66 #include <vm/vm_map.h>
  67 #include <vm/vm_pager.h>
  68
  69 #include <machine/armreg.h>
  70 #include <machine/cpu.h>
  71 #include <machine/debug_monitor.h>
  72 #include <machine/kdb.h>
  73 #include <machine/devmap.h>
  74 #include <machine/machdep.h>
  75 #include <machine/metadata.h>
  76 #include <machine/md_var.h>
  77 #include <machine/pcb.h>
  78 #include <machine/reg.h>
  79 #include <machine/vmparam.h>
  80
  81 #ifdef VFP
  82 #include <machine/vfp.h>
  83 #endif
  84
  85 #ifdef FDT
  86 #include <dev/fdt/fdt_common.h>
  87 #include <dev/ofw/openfirm.h>
  88 #endif
  89
  90 struct pcpu __pcpu[MAXCPU];
  91
  92 static struct trapframe proc0_tf;
  93
  94 vm_paddr_t phys_avail[PHYS_AVAIL_SIZE + 2];
  95 vm_paddr_t dump_avail[PHYS_AVAIL_SIZE + 2];
  96
  97 int early_boot = 1;
  98 int cold = 1;
  99 long realmem = 0;
 100 long Maxmem = 0;
 101
 102 #define PHYSMAP_SIZE    (2 * (VM_PHYSSEG_MAX - 1))
 103 vm_paddr_t physmap[PHYSMAP_SIZE];
 104 u_int physmap_idx;
 105
 106 struct kva_md_info kmi;
 107
 108 int64_t dcache_line_size;       /* The minimum D cache line size */
 109 int64_t icache_line_size;       /* The minimum I cache line size */
 110 int64_t idcache_line_size;      /* The minimum cache line size */
 111
 112 static void
 113 cpu_startup(void *dummy)
 114 {
 115
 116         identify_cpu();
 117
 118         vm_ksubmap_init(&kmi);
 119         bufinit();
 120         vm_pager_bufferinit();
 121 }
 122
 123 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
 124
 125 int
 126 cpu_idle_wakeup(int cpu)
 127 {
 128
 129         return (0);
 130 }
 131
 132 void
 133 bzero(void *buf, size_t len)
 134 {
 135         uint8_t *p;
 136
 137         p = buf;
 138         while(len-- > 0)
 139                 *p++ = 0;
 140 }
 141
 142 int
 143 fill_regs(struct thread *td, struct reg *regs)
 144 {
 145         struct trapframe *frame;
 146
 147         frame = td->td_frame;
 148         regs->sp = frame->tf_sp;
 149         regs->lr = frame->tf_lr;
 150         regs->elr = frame->tf_elr;
 151         regs->spsr = frame->tf_spsr;
 152
 153         memcpy(regs->x, frame->tf_x, sizeof(regs->x));
 154
 155         return (0);
 156 }
 157
 158 int
 159 set_regs(struct thread *td, struct reg *regs)
 160 {
 161         struct trapframe *frame;
 162
 163         frame = td->td_frame;
 164         frame->tf_sp = regs->sp;
 165         frame->tf_lr = regs->lr;
 166         frame->tf_elr = regs->elr;
 167         frame->tf_spsr = regs->spsr;
 168
 169         memcpy(frame->tf_x, regs->x, sizeof(frame->tf_x));
 170
 171         return (0);
 172 }
 173
 174 int
 175 fill_fpregs(struct thread *td, struct fpreg *regs)
 176 {
 177 #ifdef VFP
 178         struct pcb *pcb;
 179
 180         pcb = td->td_pcb;
 181         if ((pcb->pcb_fpflags & PCB_FP_STARTED) != 0) {
 182                 /*
 183                  * If we have just been running VFP instructions we will
 184                  * need to save the state to memcpy it below.
 185                  */
 186                 vfp_save_state(td, pcb);
 187
 188                 memcpy(regs->fp_q, pcb->pcb_vfp, sizeof(regs->fp_q));
 189                 regs->fp_cr = pcb->pcb_fpcr;
 190                 regs->fp_sr = pcb->pcb_fpsr;
 191         } else
 192 #endif
 193                 memset(regs->fp_q, 0, sizeof(regs->fp_q));
 194         return (0);
 195 }
 196
 197 int
 198 set_fpregs(struct thread *td, struct fpreg *regs)
 199 {
 200 #ifdef VFP
 201         struct pcb *pcb;
 202
 203         pcb = td->td_pcb;
 204         memcpy(pcb->pcb_vfp, regs->fp_q, sizeof(regs->fp_q));
 205         pcb->pcb_fpcr = regs->fp_cr;
 206         pcb->pcb_fpsr = regs->fp_sr;
 207 #endif
 208         return (0);
 209 }
 210
 211 int
 212 fill_dbregs(struct thread *td, struct dbreg *regs)
 213 {
 214
 215         panic("ARM64TODO: fill_dbregs");
 216 }
 217
 218 int
 219 set_dbregs(struct thread *td, struct dbreg *regs)
 220 {
 221
 222         panic("ARM64TODO: set_dbregs");
 223 }
 224
 225 int
 226 ptrace_set_pc(struct thread *td, u_long addr)
 227 {
 228
 229         panic("ARM64TODO: ptrace_set_pc");
 230         return (0);
 231 }
 232
 233 int
 234 ptrace_single_step(struct thread *td)
 235 {
 236
 237         /* TODO; */
 238         return (0);
 239 }
 240
 241 int
 242 ptrace_clear_single_step(struct thread *td)
 243 {
 244
 245         /* TODO; */
 246         return (0);
 247 }
 248
 249 void
 250 exec_setregs(struct thread *td, struct image_params *imgp, u_long stack)
 251 {
 252         struct trapframe *tf = td->td_frame;
 253
 254         memset(tf, 0, sizeof(struct trapframe));
 255
 256         /*
 257          * We need to set x0 for init as it doesn't call
 258          * cpu_set_syscall_retval to copy the value. We also
 259          * need to set td_retval for the cases where we do.
 260          */
 261         tf->tf_x[0] = td->td_retval[0] = stack;
 262         tf->tf_sp = STACKALIGN(stack);
 263         tf->tf_lr = imgp->entry_addr;
 264         tf->tf_elr = imgp->entry_addr;
 265 }
 266
 267 /* Sanity check these are the same size, they will be memcpy'd to and fro */
 268 CTASSERT(sizeof(((struct trapframe *)0)->tf_x) ==
 269     sizeof((struct gpregs *)0)->gp_x);
 270 CTASSERT(sizeof(((struct trapframe *)0)->tf_x) ==
 271     sizeof((struct reg *)0)->x);
 272
 273 int
 274 get_mcontext(struct thread *td, mcontext_t *mcp, int clear_ret)
 275 {
 276         struct trapframe *tf = td->td_frame;
 277
 278         if (clear_ret & GET_MC_CLEAR_RET) {
 279                 mcp->mc_gpregs.gp_x[0] = 0;
 280                 mcp->mc_gpregs.gp_spsr = tf->tf_spsr & ~PSR_C;
 281         } else {
 282                 mcp->mc_gpregs.gp_x[0] = tf->tf_x[0];
 283                 mcp->mc_gpregs.gp_spsr = tf->tf_spsr;
 284         }
 285
 286         memcpy(&mcp->mc_gpregs.gp_x[1], &tf->tf_x[1],
 287             sizeof(mcp->mc_gpregs.gp_x[1]) * (nitems(mcp->mc_gpregs.gp_x) - 1));
 288
 289         mcp->mc_gpregs.gp_sp = tf->tf_sp;
 290         mcp->mc_gpregs.gp_lr = tf->tf_lr;
 291         mcp->mc_gpregs.gp_elr = tf->tf_elr;
 292
 293         return (0);
 294 }
 295
 296 int
 297 set_mcontext(struct thread *td, mcontext_t *mcp)
 298 {
 299         struct trapframe *tf = td->td_frame;
 300
 301         memcpy(tf->tf_x, mcp->mc_gpregs.gp_x, sizeof(tf->tf_x));
 302
 303         tf->tf_sp = mcp->mc_gpregs.gp_sp;
 304         tf->tf_lr = mcp->mc_gpregs.gp_lr;
 305         tf->tf_elr = mcp->mc_gpregs.gp_elr;
 306         tf->tf_spsr = mcp->mc_gpregs.gp_spsr;
 307
 308         return (0);
 309 }
 310
 311 static void
 312 get_fpcontext(struct thread *td, mcontext_t *mcp)
 313 {
 314 #ifdef VFP
 315         struct pcb *curpcb;
 316
 317         critical_enter();
 318
 319         curpcb = curthread->td_pcb;
 320
 321         if ((curpcb->pcb_fpflags & PCB_FP_STARTED) != 0) {
 322                 /*
 323                  * If we have just been running VFP instructions we will
 324                  * need to save the state to memcpy it below.
 325                  */
 326                 vfp_save_state(td, curpcb);
 327
 328                 memcpy(mcp->mc_fpregs.fp_q, curpcb->pcb_vfp,
 329                     sizeof(mcp->mc_fpregs));
 330                 mcp->mc_fpregs.fp_cr = curpcb->pcb_fpcr;
 331                 mcp->mc_fpregs.fp_sr = curpcb->pcb_fpsr;
 332                 mcp->mc_fpregs.fp_flags = curpcb->pcb_fpflags;
 333                 mcp->mc_flags |= _MC_FP_VALID;
 334         }
 335
 336         critical_exit();
 337 #endif
 338 }
 339
 340 static void
 341 set_fpcontext(struct thread *td, mcontext_t *mcp)
 342 {
 343 #ifdef VFP
 344         struct pcb *curpcb;
 345
 346         critical_enter();
 347
 348         if ((mcp->mc_flags & _MC_FP_VALID) != 0) {
 349                 curpcb = curthread->td_pcb;
 350
 351                 /*
 352                  * Discard any vfp state for the current thread, we
 353                  * are about to override it.
 354                  */
 355                 vfp_discard(td);
 356
 357                 memcpy(curpcb->pcb_vfp, mcp->mc_fpregs.fp_q,
 358                     sizeof(mcp->mc_fpregs));
 359                 curpcb->pcb_fpcr = mcp->mc_fpregs.fp_cr;
 360                 curpcb->pcb_fpsr = mcp->mc_fpregs.fp_sr;
 361                 curpcb->pcb_fpflags = mcp->mc_fpregs.fp_flags;
 362         }
 363
 364         critical_exit();
 365 #endif
 366 }
 367
 368 void
 369 cpu_idle(int busy)
 370 {
 371
 372         spinlock_enter();
 373         if (!busy)
 374                 cpu_idleclock();
 375         if (!sched_runnable())
 376                 __asm __volatile(
 377                     "dsb sy \n"
 378                     "wfi    \n");
 379         if (!busy)
 380                 cpu_activeclock();
 381         spinlock_exit();
 382 }
 383
 384 void
 385 cpu_halt(void)
 386 {
 387
 388         /* We should have shutdown by now, if not enter a low power sleep */
 389         intr_disable();
 390         while (1) {
 391                 __asm __volatile("wfi");
 392         }
 393 }
 394
 395 /*
 396  * Flush the D-cache for non-DMA I/O so that the I-cache can
 397  * be made coherent later.
 398  */
 399 void
 400 cpu_flush_dcache(void *ptr, size_t len)
 401 {
 402
 403         /* ARM64TODO TBD */
 404 }
 405
 406 /* Get current clock frequency for the given CPU ID. */
 407 int
 408 cpu_est_clockrate(int cpu_id, uint64_t *rate)
 409 {
 410
 411         panic("ARM64TODO: cpu_est_clockrate");
 412 }
 413
 414 void
 415 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size)
 416 {
 417
 418         pcpu->pc_acpi_id = 0xffffffff;
 419 }
 420
 421 void
 422 spinlock_enter(void)
 423 {
 424         struct thread *td;
 425         register_t daif;
 426
 427         td = curthread;
 428         if (td->td_md.md_spinlock_count == 0) {
 429                 daif = intr_disable();
 430                 td->td_md.md_spinlock_count = 1;
 431                 td->td_md.md_saved_daif = daif;
 432         } else
 433                 td->td_md.md_spinlock_count++;
 434         critical_enter();
 435 }
 436
 437 void
 438 spinlock_exit(void)
 439 {
 440         struct thread *td;
 441         register_t daif;
 442
 443         td = curthread;
 444         critical_exit();
 445         daif = td->td_md.md_saved_daif;
 446         td->td_md.md_spinlock_count--;
 447         if (td->td_md.md_spinlock_count == 0)
 448                 intr_restore(daif);
 449 }
 450
 451 #ifndef _SYS_SYSPROTO_H_
 452 struct sigreturn_args {
 453         ucontext_t *ucp;
 454 };
 455 #endif
 456
 457 int
 458 sys_sigreturn(struct thread *td, struct sigreturn_args *uap)
 459 {
 460         ucontext_t uc;
 461         uint32_t spsr;
 462
 463         if (uap == NULL)
 464                 return (EFAULT);
 465         if (copyin(uap->sigcntxp, &uc, sizeof(uc)))
 466                 return (EFAULT);
 467
 468         spsr = uc.uc_mcontext.mc_gpregs.gp_spsr;
 469         if ((spsr & PSR_M_MASK) != PSR_M_EL0t ||
 470             (spsr & (PSR_F | PSR_I | PSR_A | PSR_D)) != 0)
 471                 return (EINVAL);
 472
 473         set_mcontext(td, &uc.uc_mcontext);
 474         set_fpcontext(td, &uc.uc_mcontext);
 475
 476         /* Restore signal mask. */
 477         kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0);
 478
 479         return (EJUSTRETURN);
 480 }
 481
 482 /*
 483  * Construct a PCB from a trapframe. This is called from kdb_trap() where
 484  * we want to start a backtrace from the function that caused us to enter
 485  * the debugger. We have the context in the trapframe, but base the trace
 486  * on the PCB. The PCB doesn't have to be perfect, as long as it contains
 487  * enough for a backtrace.
 488  */
 489 void
 490 makectx(struct trapframe *tf, struct pcb *pcb)
 491 {
 492         int i;
 493
 494         for (i = 0; i < PCB_LR; i++)
 495                 pcb->pcb_x[i] = tf->tf_x[i];
 496
 497         pcb->pcb_x[PCB_LR] = tf->tf_lr;
 498         pcb->pcb_pc = tf->tf_elr;
 499         pcb->pcb_sp = tf->tf_sp;
 500 }
 501
 502 void
 503 sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
 504 {
 505         struct thread *td;
 506         struct proc *p;
 507         struct trapframe *tf;
 508         struct sigframe *fp, frame;
 509         struct sigacts *psp;
 510         struct sysentvec *sysent;
 511         int code, onstack, sig;
 512
 513         td = curthread;
 514         p = td->td_proc;
 515         PROC_LOCK_ASSERT(p, MA_OWNED);
 516
 517         sig = ksi->ksi_signo;
 518         code = ksi->ksi_code;
 519         psp = p->p_sigacts;
 520         mtx_assert(&psp->ps_mtx, MA_OWNED);
 521
 522         tf = td->td_frame;
 523         onstack = sigonstack(tf->tf_sp);
 524
 525         CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm,
 526             catcher, sig);
 527
 528         /* Allocate and validate space for the signal handler context. */
 529         if ((td->td_pflags & TDP_ALTSTACK) != 0 && !onstack &&
 530             SIGISMEMBER(psp->ps_sigonstack, sig)) {
 531                 fp = (struct sigframe *)(td->td_sigstk.ss_sp +
 532                     td->td_sigstk.ss_size);
 533 #if defined(COMPAT_43)
 534                 td->td_sigstk.ss_flags |= SS_ONSTACK;
 535 #endif
 536         } else {
 537                 fp = (struct sigframe *)td->td_frame->tf_sp;
 538         }
 539
 540         /* Make room, keeping the stack aligned */
 541         fp--;
 542         fp = (struct sigframe *)STACKALIGN(fp);
 543
 544         /* Fill in the frame to copy out */
 545         get_mcontext(td, &frame.sf_uc.uc_mcontext, 0);
 546         get_fpcontext(td, &frame.sf_uc.uc_mcontext);
 547         frame.sf_si = ksi->ksi_info;
 548         frame.sf_uc.uc_sigmask = *mask;
 549         frame.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) ?
 550             ((onstack) ? SS_ONSTACK : 0) : SS_DISABLE;
 551         frame.sf_uc.uc_stack = td->td_sigstk;
 552         mtx_unlock(&psp->ps_mtx);
 553         PROC_UNLOCK(td->td_proc);
 554
 555         /* Copy the sigframe out to the user's stack. */
 556         if (copyout(&frame, fp, sizeof(*fp)) != 0) {
 557                 /* Process has trashed its stack. Kill it. */
 558                 CTR2(KTR_SIG, "sendsig: sigexit td=%p fp=%p", td, fp);
 559                 PROC_LOCK(p);
 560                 sigexit(td, SIGILL);
 561         }
 562
 563         tf->tf_x[0]= sig;
 564         tf->tf_x[1] = (register_t)&fp->sf_si;
 565         tf->tf_x[2] = (register_t)&fp->sf_uc;
 566
 567         tf->tf_elr = (register_t)catcher;
 568         tf->tf_sp = (register_t)fp;
 569         sysent = p->p_sysent;
 570         if (sysent->sv_sigcode_base != 0)
 571                 tf->tf_lr = (register_t)sysent->sv_sigcode_base;
 572         else
 573                 tf->tf_lr = (register_t)(sysent->sv_psstrings -
 574                     *(sysent->sv_szsigcode));
 575
 576         CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, tf->tf_elr,
 577             tf->tf_sp);
 578
 579         PROC_LOCK(p);
 580         mtx_lock(&psp->ps_mtx);
 581 }
 582
 583 static void
 584 init_proc0(vm_offset_t kstack)
 585 {
 586         struct pcpu *pcpup = &__pcpu[0];
 587
 588         proc_linkup0(&proc0, &thread0);
 589         thread0.td_kstack = kstack;
 590         thread0.td_pcb = (struct pcb *)(thread0.td_kstack) - 1;
 591         thread0.td_pcb->pcb_fpflags = 0;
 592         thread0.td_pcb->pcb_vfpcpu = UINT_MAX;
 593         thread0.td_frame = &proc0_tf;
 594         pcpup->pc_curpcb = thread0.td_pcb;
 595 }
 596
 597 typedef struct {
 598         uint32_t type;
 599         uint64_t phys_start;
 600         uint64_t virt_start;
 601         uint64_t num_pages;
 602         uint64_t attr;
 603 } EFI_MEMORY_DESCRIPTOR;
 604
 605 static int
 606 add_physmap_entry(uint64_t base, uint64_t length, vm_paddr_t *physmap,
 607     u_int *physmap_idxp)
 608 {
 609         u_int i, insert_idx, _physmap_idx;
 610
 611         _physmap_idx = *physmap_idxp;
 612
 613         if (length == 0)
 614                 return (1);
 615
 616         /*
 617          * Find insertion point while checking for overlap.  Start off by
 618          * assuming the new entry will be added to the end.
 619          */
 620         insert_idx = _physmap_idx;
 621         for (i = 0; i <= _physmap_idx; i += 2) {
 622                 if (base < physmap[i + 1]) {
 623                         if (base + length <= physmap[i]) {
 624                                 insert_idx = i;
 625                                 break;
 626                         }
 627                         if (boothowto & RB_VERBOSE)
 628                                 printf(
 629                     "Overlapping memory regions, ignoring second region\n");
 630                         return (1);
 631                 }
 632         }
 633
 634         /* See if we can prepend to the next entry. */
 635         if (insert_idx <= _physmap_idx &&
 636             base + length == physmap[insert_idx]) {
 637                 physmap[insert_idx] = base;
 638                 return (1);
 639         }
 640
 641         /* See if we can append to the previous entry. */
 642         if (insert_idx > 0 && base == physmap[insert_idx - 1]) {
 643                 physmap[insert_idx - 1] += length;
 644                 return (1);
 645         }
 646
 647         _physmap_idx += 2;
 648         *physmap_idxp = _physmap_idx;
 649         if (_physmap_idx == PHYSMAP_SIZE) {
 650                 printf(
 651                 "Too many segments in the physical address map, giving up\n");
 652                 return (0);
 653         }
 654
 655         /*
 656          * Move the last 'N' entries down to make room for the new
 657          * entry if needed.
 658          */
 659         for (i = _physmap_idx; i > insert_idx; i -= 2) {
 660                 physmap[i] = physmap[i - 2];
 661                 physmap[i + 1] = physmap[i - 1];
 662         }
 663
 664         /* Insert the new entry. */
 665         physmap[insert_idx] = base;
 666         physmap[insert_idx + 1] = base + length;
 667         return (1);
 668 }
 669
 670 #define efi_next_descriptor(ptr, size) \
 671         ((struct efi_md *)(((uint8_t *) ptr) + size))
 672
 673 static void
 674 add_efi_map_entries(struct efi_map_header *efihdr, vm_paddr_t *physmap,
 675     u_int *physmap_idxp)
 676 {
 677         struct efi_md *map, *p;
 678         const char *type;
 679         size_t efisz;
 680         int ndesc, i;
 681
 682         static const char *types[] = {
 683                 "Reserved",
 684                 "LoaderCode",
 685                 "LoaderData",
 686                 "BootServicesCode",
 687                 "BootServicesData",
 688                 "RuntimeServicesCode",
 689                 "RuntimeServicesData",
 690                 "ConventionalMemory",
 691                 "UnusableMemory",
 692                 "ACPIReclaimMemory",
 693                 "ACPIMemoryNVS",
 694                 "MemoryMappedIO",
 695                 "MemoryMappedIOPortSpace",
 696                 "PalCode"
 697         };
 698
 699         /*
 700          * Memory map data provided by UEFI via the GetMemoryMap
 701          * Boot Services API.
 702          */
 703         efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf;
 704         map = (struct efi_md *)((uint8_t *)efihdr + efisz);
 705
 706         if (efihdr->descriptor_size == 0)
 707                 return;
 708         ndesc = efihdr->memory_size / efihdr->descriptor_size;
 709
 710         if (boothowto & RB_VERBOSE)
 711                 printf("%23s %12s %12s %8s %4s\n",
 712                     "Type", "Physical", "Virtual", "#Pages", "Attr");
 713
 714         for (i = 0, p = map; i < ndesc; i++,
 715             p = efi_next_descriptor(p, efihdr->descriptor_size)) {
 716                 if (boothowto & RB_VERBOSE) {
 717                         if (p->md_type <= EFI_MD_TYPE_PALCODE)
 718                                 type = types[p->md_type];
 719                         else
 720                                 type = "<INVALID>";
 721                         printf("%23s %012lx %12p %08lx ", type, p->md_phys,
 722                             p->md_virt, p->md_pages);
 723                         if (p->md_attr & EFI_MD_ATTR_UC)
 724                                 printf("UC ");
 725                         if (p->md_attr & EFI_MD_ATTR_WC)
 726                                 printf("WC ");
 727                         if (p->md_attr & EFI_MD_ATTR_WT)
 728                                 printf("WT ");
 729                         if (p->md_attr & EFI_MD_ATTR_WB)
 730                                 printf("WB ");
 731                         if (p->md_attr & EFI_MD_ATTR_UCE)
 732                                 printf("UCE ");
 733                         if (p->md_attr & EFI_MD_ATTR_WP)
 734                                 printf("WP ");
 735                         if (p->md_attr & EFI_MD_ATTR_RP)
 736                                 printf("RP ");
 737                         if (p->md_attr & EFI_MD_ATTR_XP)
 738                                 printf("XP ");
 739                         if (p->md_attr & EFI_MD_ATTR_RT)
 740                                 printf("RUNTIME");
 741                         printf("\n");
 742                 }
 743
 744                 switch (p->md_type) {
 745                 case EFI_MD_TYPE_CODE:
 746                 case EFI_MD_TYPE_DATA:
 747                 case EFI_MD_TYPE_BS_CODE:
 748                 case EFI_MD_TYPE_BS_DATA:
 749                 case EFI_MD_TYPE_FREE:
 750                         /*
 751                          * We're allowed to use any entry with these types.
 752                          */
 753                         break;
 754                 default:
 755                         continue;
 756                 }
 757
 758                 if (!add_physmap_entry(p->md_phys, (p->md_pages * PAGE_SIZE),
 759                     physmap, physmap_idxp))
 760                         break;
 761         }
 762 }
 763
 764 #ifdef FDT
 765 static void
 766 try_load_dtb(caddr_t kmdp)
 767 {
 768         vm_offset_t dtbp;
 769
 770         dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t);
 771         if (dtbp == (vm_offset_t)NULL) {
 772                 printf("ERROR loading DTB\n");
 773                 return;
 774         }
 775
 776         if (OF_install(OFW_FDT, 0) == FALSE)
 777                 panic("Cannot install FDT");
 778
 779         if (OF_init((void *)dtbp) != 0)
 780                 panic("OF_init failed with the found device tree");
 781 }
 782 #endif
 783
 784 static void
 785 cache_setup(void)
 786 {
 787         int dcache_line_shift, icache_line_shift;
 788         uint32_t ctr_el0;
 789
 790         ctr_el0 = READ_SPECIALREG(ctr_el0);
 791
 792         /* Read the log2 words in each D cache line */
 793         dcache_line_shift = CTR_DLINE_SIZE(ctr_el0);
 794         /* Get the D cache line size */
 795         dcache_line_size = sizeof(int) << dcache_line_shift;
 796
 797         /* And the same for the I cache */
 798         icache_line_shift = CTR_ILINE_SIZE(ctr_el0);
 799         icache_line_size = sizeof(int) << icache_line_shift;
 800
 801         idcache_line_size = MIN(dcache_line_size, icache_line_size);
 802 }
 803
 804 void
 805 initarm(struct arm64_bootparams *abp)
 806 {
 807         struct efi_map_header *efihdr;
 808         struct pcpu *pcpup;
 809         vm_offset_t lastaddr;
 810         caddr_t kmdp;
 811         vm_paddr_t mem_len;
 812         int i;
 813
 814         /* Set the module data location */
 815         preload_metadata = (caddr_t)(uintptr_t)(abp->modulep);
 816
 817         /* Find the kernel address */
 818         kmdp = preload_search_by_type("elf kernel");
 819         if (kmdp == NULL)
 820                 kmdp = preload_search_by_type("elf64 kernel");
 821
 822         boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
 823         init_static_kenv(MD_FETCH(kmdp, MODINFOMD_ENVP, char *), 0);
 824
 825 #ifdef FDT
 826         try_load_dtb(kmdp);
 827 #endif
 828
 829         /* Find the address to start allocating from */
 830         lastaddr = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
 831
 832         /* Load the physical memory ranges */
 833         physmap_idx = 0;
 834         efihdr = (struct efi_map_header *)preload_search_info(kmdp,
 835             MODINFO_METADATA | MODINFOMD_EFI_MAP);
 836         add_efi_map_entries(efihdr, physmap, &physmap_idx);
 837
 838         /* Print the memory map */
 839         mem_len = 0;
 840         for (i = 0; i < physmap_idx; i += 2) {
 841                 dump_avail[i] = physmap[i];
 842                 dump_avail[i + 1] = physmap[i + 1];
 843                 mem_len += physmap[i + 1] - physmap[i];
 844         }
 845         dump_avail[i] = 0;
 846         dump_avail[i + 1] = 0;
 847
 848         /* Set the pcpu data, this is needed by pmap_bootstrap */
 849         pcpup = &__pcpu[0];
 850         pcpu_init(pcpup, 0, sizeof(struct pcpu));
 851
 852         /*
 853          * Set the pcpu pointer with a backup in tpidr_el1 to be
 854          * loaded when entering the kernel from userland.
 855          */
 856         __asm __volatile(
 857             "mov x18, %0 \n"
 858             "msr tpidr_el1, %0" :: "r"(pcpup));
 859
 860         PCPU_SET(curthread, &thread0);
 861
 862         /* Do basic tuning, hz etc */
 863         init_param1();
 864
 865         cache_setup();
 866
 867         /* Bootstrap enough of pmap  to enter the kernel proper */
 868         pmap_bootstrap(abp->kern_l1pt, KERNBASE - abp->kern_delta,
 869             lastaddr - KERNBASE);
 870
 871         arm_devmap_bootstrap(0, NULL);
 872
 873         cninit();
 874
 875         init_proc0(abp->kern_stack);
 876         msgbufinit(msgbufp, msgbufsize);
 877         mutex_init();
 878         init_param2(physmem);
 879
 880         dbg_monitor_init();
 881         kdb_init();
 882
 883         early_boot = 0;
 884 }
 885
 886 uint32_t (*arm_cpu_fill_vdso_timehands)(struct vdso_timehands *,
 887     struct timecounter *);
 888
 889 uint32_t
 890 cpu_fill_vdso_timehands(struct vdso_timehands *vdso_th, struct timecounter *tc)
 891 {
 892
 893         return (arm_cpu_fill_vdso_timehands != NULL ?
 894             arm_cpu_fill_vdso_timehands(vdso_th, tc) : 0);
 895 }
 896
 897 #ifdef DDB
 898 #include <ddb/ddb.h>
 899
 900 DB_SHOW_COMMAND(specialregs, db_show_spregs)
 901 {
 902 #define PRINT_REG(reg)  \
 903     db_printf(__STRING(reg) " = %#016lx\n", READ_SPECIALREG(reg))
 904
 905         PRINT_REG(actlr_el1);
 906         PRINT_REG(afsr0_el1);
 907         PRINT_REG(afsr1_el1);
 908         PRINT_REG(aidr_el1);
 909         PRINT_REG(amair_el1);
 910         PRINT_REG(ccsidr_el1);
 911         PRINT_REG(clidr_el1);
 912         PRINT_REG(contextidr_el1);
 913         PRINT_REG(cpacr_el1);
 914         PRINT_REG(csselr_el1);
 915         PRINT_REG(ctr_el0);
 916         PRINT_REG(currentel);
 917         PRINT_REG(daif);
 918         PRINT_REG(dczid_el0);
 919         PRINT_REG(elr_el1);
 920         PRINT_REG(esr_el1);
 921         PRINT_REG(far_el1);
 922 #if 0
 923         /* ARM64TODO: Enable VFP before reading floating-point registers */
 924         PRINT_REG(fpcr);
 925         PRINT_REG(fpsr);
 926 #endif
 927         PRINT_REG(id_aa64afr0_el1);
 928         PRINT_REG(id_aa64afr1_el1);
 929         PRINT_REG(id_aa64dfr0_el1);
 930         PRINT_REG(id_aa64dfr1_el1);
 931         PRINT_REG(id_aa64isar0_el1);
 932         PRINT_REG(id_aa64isar1_el1);
 933         PRINT_REG(id_aa64pfr0_el1);
 934         PRINT_REG(id_aa64pfr1_el1);
 935         PRINT_REG(id_afr0_el1);
 936         PRINT_REG(id_dfr0_el1);
 937         PRINT_REG(id_isar0_el1);
 938         PRINT_REG(id_isar1_el1);
 939         PRINT_REG(id_isar2_el1);
 940         PRINT_REG(id_isar3_el1);
 941         PRINT_REG(id_isar4_el1);
 942         PRINT_REG(id_isar5_el1);
 943         PRINT_REG(id_mmfr0_el1);
 944         PRINT_REG(id_mmfr1_el1);
 945         PRINT_REG(id_mmfr2_el1);
 946         PRINT_REG(id_mmfr3_el1);
 947 #if 0
 948         /* Missing from llvm */
 949         PRINT_REG(id_mmfr4_el1);
 950 #endif
 951         PRINT_REG(id_pfr0_el1);
 952         PRINT_REG(id_pfr1_el1);
 953         PRINT_REG(isr_el1);
 954         PRINT_REG(mair_el1);
 955         PRINT_REG(midr_el1);
 956         PRINT_REG(mpidr_el1);
 957         PRINT_REG(mvfr0_el1);
 958         PRINT_REG(mvfr1_el1);
 959         PRINT_REG(mvfr2_el1);
 960         PRINT_REG(revidr_el1);
 961         PRINT_REG(sctlr_el1);
 962         PRINT_REG(sp_el0);
 963         PRINT_REG(spsel);
 964         PRINT_REG(spsr_el1);
 965         PRINT_REG(tcr_el1);
 966         PRINT_REG(tpidr_el0);
 967         PRINT_REG(tpidr_el1);
 968         PRINT_REG(tpidrro_el0);
 969         PRINT_REG(ttbr0_el1);
 970         PRINT_REG(ttbr1_el1);
 971         PRINT_REG(vbar_el1);
 972 #undef PRINT_REG
 973 }
 974
 975 DB_SHOW_COMMAND(vtop, db_show_vtop)
 976 {
 977         uint64_t phys;
 978
 979         if (have_addr) {
 980                 phys = arm64_address_translate_s1e1r(addr);
 981                 db_printf("Physical address reg: 0x%016lx\n", phys);
 982         } else
 983                 db_printf("show vtop <virt_addr>\n");
 984 }
 985 #endif