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