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