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         td->td_frame->tf_spsr |= PSR_SS;
 237         td->td_pcb->pcb_flags |= PCB_SINGLE_STEP;
 238         return (0);
 239 }
 240
 241 int
 242 ptrace_clear_single_step(struct thread *td)
 243 {
 244
 245         td->td_frame->tf_spsr &= ~PSR_SS;
 246         td->td_pcb->pcb_flags &= ~PCB_SINGLE_STEP;
 247         return (0);
 248 }
 249
 250 void
 251 exec_setregs(struct thread *td, struct image_params *imgp, u_long stack)
 252 {
 253         struct trapframe *tf = td->td_frame;
 254
 255         memset(tf, 0, sizeof(struct trapframe));
 256
 257         /*
 258          * We need to set x0 for init as it doesn't call
 259          * cpu_set_syscall_retval to copy the value. We also
 260          * need to set td_retval for the cases where we do.
 261          */
 262         tf->tf_x[0] = td->td_retval[0] = stack;
 263         tf->tf_sp = STACKALIGN(stack);
 264         tf->tf_lr = imgp->entry_addr;
 265         tf->tf_elr = imgp->entry_addr;
 266 }
 267
 268 /* Sanity check these are the same size, they will be memcpy'd to and fro */
 269 CTASSERT(sizeof(((struct trapframe *)0)->tf_x) ==
 270     sizeof((struct gpregs *)0)->gp_x);
 271 CTASSERT(sizeof(((struct trapframe *)0)->tf_x) ==
 272     sizeof((struct reg *)0)->x);
 273
 274 int
 275 get_mcontext(struct thread *td, mcontext_t *mcp, int clear_ret)
 276 {
 277         struct trapframe *tf = td->td_frame;
 278
 279         if (clear_ret & GET_MC_CLEAR_RET) {
 280                 mcp->mc_gpregs.gp_x[0] = 0;
 281                 mcp->mc_gpregs.gp_spsr = tf->tf_spsr & ~PSR_C;
 282         } else {
 283                 mcp->mc_gpregs.gp_x[0] = tf->tf_x[0];
 284                 mcp->mc_gpregs.gp_spsr = tf->tf_spsr;
 285         }
 286
 287         memcpy(&mcp->mc_gpregs.gp_x[1], &tf->tf_x[1],
 288             sizeof(mcp->mc_gpregs.gp_x[1]) * (nitems(mcp->mc_gpregs.gp_x) - 1));
 289
 290         mcp->mc_gpregs.gp_sp = tf->tf_sp;
 291         mcp->mc_gpregs.gp_lr = tf->tf_lr;
 292         mcp->mc_gpregs.gp_elr = tf->tf_elr;
 293
 294         return (0);
 295 }
 296
 297 int
 298 set_mcontext(struct thread *td, mcontext_t *mcp)
 299 {
 300         struct trapframe *tf = td->td_frame;
 301
 302         memcpy(tf->tf_x, mcp->mc_gpregs.gp_x, sizeof(tf->tf_x));
 303
 304         tf->tf_sp = mcp->mc_gpregs.gp_sp;
 305         tf->tf_lr = mcp->mc_gpregs.gp_lr;
 306         tf->tf_elr = mcp->mc_gpregs.gp_elr;
 307         tf->tf_spsr = mcp->mc_gpregs.gp_spsr;
 308
 309         return (0);
 310 }
 311
 312 static void
 313 get_fpcontext(struct thread *td, mcontext_t *mcp)
 314 {
 315 #ifdef VFP
 316         struct pcb *curpcb;
 317
 318         critical_enter();
 319
 320         curpcb = curthread->td_pcb;
 321
 322         if ((curpcb->pcb_fpflags & PCB_FP_STARTED) != 0) {
 323                 /*
 324                  * If we have just been running VFP instructions we will
 325                  * need to save the state to memcpy it below.
 326                  */
 327                 vfp_save_state(td, curpcb);
 328
 329                 memcpy(mcp->mc_fpregs.fp_q, curpcb->pcb_vfp,
 330                     sizeof(mcp->mc_fpregs));
 331                 mcp->mc_fpregs.fp_cr = curpcb->pcb_fpcr;
 332                 mcp->mc_fpregs.fp_sr = curpcb->pcb_fpsr;
 333                 mcp->mc_fpregs.fp_flags = curpcb->pcb_fpflags;
 334                 mcp->mc_flags |= _MC_FP_VALID;
 335         }
 336
 337         critical_exit();
 338 #endif
 339 }
 340
 341 static void
 342 set_fpcontext(struct thread *td, mcontext_t *mcp)
 343 {
 344 #ifdef VFP
 345         struct pcb *curpcb;
 346
 347         critical_enter();
 348
 349         if ((mcp->mc_flags & _MC_FP_VALID) != 0) {
 350                 curpcb = curthread->td_pcb;
 351
 352                 /*
 353                  * Discard any vfp state for the current thread, we
 354                  * are about to override it.
 355                  */
 356                 vfp_discard(td);
 357
 358                 memcpy(curpcb->pcb_vfp, mcp->mc_fpregs.fp_q,
 359                     sizeof(mcp->mc_fpregs));
 360                 curpcb->pcb_fpcr = mcp->mc_fpregs.fp_cr;
 361                 curpcb->pcb_fpsr = mcp->mc_fpregs.fp_sr;
 362                 curpcb->pcb_fpflags = mcp->mc_fpregs.fp_flags;
 363         }
 364
 365         critical_exit();
 366 #endif
 367 }
 368
 369 void
 370 cpu_idle(int busy)
 371 {
 372
 373         spinlock_enter();
 374         if (!busy)
 375                 cpu_idleclock();
 376         if (!sched_runnable())
 377                 __asm __volatile(
 378                     "dsb sy \n"
 379                     "wfi    \n");
 380         if (!busy)
 381                 cpu_activeclock();
 382         spinlock_exit();
 383 }
 384
 385 void
 386 cpu_halt(void)
 387 {
 388
 389         /* We should have shutdown by now, if not enter a low power sleep */
 390         intr_disable();
 391         while (1) {
 392                 __asm __volatile("wfi");
 393         }
 394 }
 395
 396 /*
 397  * Flush the D-cache for non-DMA I/O so that the I-cache can
 398  * be made coherent later.
 399  */
 400 void
 401 cpu_flush_dcache(void *ptr, size_t len)
 402 {
 403
 404         /* ARM64TODO TBD */
 405 }
 406
 407 /* Get current clock frequency for the given CPU ID. */
 408 int
 409 cpu_est_clockrate(int cpu_id, uint64_t *rate)
 410 {
 411
 412         panic("ARM64TODO: cpu_est_clockrate");
 413 }
 414
 415 void
 416 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size)
 417 {
 418
 419         pcpu->pc_acpi_id = 0xffffffff;
 420 }
 421
 422 void
 423 spinlock_enter(void)
 424 {
 425         struct thread *td;
 426         register_t daif;
 427
 428         td = curthread;
 429         if (td->td_md.md_spinlock_count == 0) {
 430                 daif = intr_disable();
 431                 td->td_md.md_spinlock_count = 1;
 432                 td->td_md.md_saved_daif = daif;
 433         } else
 434                 td->td_md.md_spinlock_count++;
 435         critical_enter();
 436 }
 437
 438 void
 439 spinlock_exit(void)
 440 {
 441         struct thread *td;
 442         register_t daif;
 443
 444         td = curthread;
 445         critical_exit();
 446         daif = td->td_md.md_saved_daif;
 447         td->td_md.md_spinlock_count--;
 448         if (td->td_md.md_spinlock_count == 0)
 449                 intr_restore(daif);
 450 }
 451
 452 #ifndef _SYS_SYSPROTO_H_
 453 struct sigreturn_args {
 454         ucontext_t *ucp;
 455 };
 456 #endif
 457
 458 int
 459 sys_sigreturn(struct thread *td, struct sigreturn_args *uap)
 460 {
 461         ucontext_t uc;
 462         uint32_t spsr;
 463
 464         if (uap == NULL)
 465                 return (EFAULT);
 466         if (copyin(uap->sigcntxp, &uc, sizeof(uc)))
 467                 return (EFAULT);
 468
 469         spsr = uc.uc_mcontext.mc_gpregs.gp_spsr;
 470         if ((spsr & PSR_M_MASK) != PSR_M_EL0t ||
 471             (spsr & (PSR_F | PSR_I | PSR_A | PSR_D)) != 0)
 472                 return (EINVAL);
 473
 474         set_mcontext(td, &uc.uc_mcontext);
 475         set_fpcontext(td, &uc.uc_mcontext);
 476
 477         /* Restore signal mask. */
 478         kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0);
 479
 480         return (EJUSTRETURN);
 481 }
 482
 483 /*
 484  * Construct a PCB from a trapframe. This is called from kdb_trap() where
 485  * we want to start a backtrace from the function that caused us to enter
 486  * the debugger. We have the context in the trapframe, but base the trace
 487  * on the PCB. The PCB doesn't have to be perfect, as long as it contains
 488  * enough for a backtrace.
 489  */
 490 void
 491 makectx(struct trapframe *tf, struct pcb *pcb)
 492 {
 493         int i;
 494
 495         for (i = 0; i < PCB_LR; i++)
 496                 pcb->pcb_x[i] = tf->tf_x[i];
 497
 498         pcb->pcb_x[PCB_LR] = tf->tf_lr;
 499         pcb->pcb_pc = tf->tf_elr;
 500         pcb->pcb_sp = tf->tf_sp;
 501 }
 502
 503 void
 504 sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
 505 {
 506         struct thread *td;
 507         struct proc *p;
 508         struct trapframe *tf;
 509         struct sigframe *fp, frame;
 510         struct sigacts *psp;
 511         struct sysentvec *sysent;
 512         int code, onstack, sig;
 513
 514         td = curthread;
 515         p = td->td_proc;
 516         PROC_LOCK_ASSERT(p, MA_OWNED);
 517
 518         sig = ksi->ksi_signo;
 519         code = ksi->ksi_code;
 520         psp = p->p_sigacts;
 521         mtx_assert(&psp->ps_mtx, MA_OWNED);
 522
 523         tf = td->td_frame;
 524         onstack = sigonstack(tf->tf_sp);
 525
 526         CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm,
 527             catcher, sig);
 528
 529         /* Allocate and validate space for the signal handler context. */
 530         if ((td->td_pflags & TDP_ALTSTACK) != 0 && !onstack &&
 531             SIGISMEMBER(psp->ps_sigonstack, sig)) {
 532                 fp = (struct sigframe *)((uintptr_t)td->td_sigstk.ss_sp +
 533                     td->td_sigstk.ss_size);
 534 #if defined(COMPAT_43)
 535                 td->td_sigstk.ss_flags |= SS_ONSTACK;
 536 #endif
 537         } else {
 538                 fp = (struct sigframe *)td->td_frame->tf_sp;
 539         }
 540
 541         /* Make room, keeping the stack aligned */
 542         fp--;
 543         fp = (struct sigframe *)STACKALIGN(fp);
 544
 545         /* Fill in the frame to copy out */
 546         get_mcontext(td, &frame.sf_uc.uc_mcontext, 0);
 547         get_fpcontext(td, &frame.sf_uc.uc_mcontext);
 548         frame.sf_si = ksi->ksi_info;
 549         frame.sf_uc.uc_sigmask = *mask;
 550         frame.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) ?
 551             ((onstack) ? SS_ONSTACK : 0) : SS_DISABLE;
 552         frame.sf_uc.uc_stack = td->td_sigstk;
 553         mtx_unlock(&psp->ps_mtx);
 554         PROC_UNLOCK(td->td_proc);
 555
 556         /* Copy the sigframe out to the user's stack. */
 557         if (copyout(&frame, fp, sizeof(*fp)) != 0) {
 558                 /* Process has trashed its stack. Kill it. */
 559                 CTR2(KTR_SIG, "sendsig: sigexit td=%p fp=%p", td, fp);
 560                 PROC_LOCK(p);
 561                 sigexit(td, SIGILL);
 562         }
 563
 564         tf->tf_x[0]= sig;
 565         tf->tf_x[1] = (register_t)&fp->sf_si;
 566         tf->tf_x[2] = (register_t)&fp->sf_uc;
 567
 568         tf->tf_elr = (register_t)catcher;
 569         tf->tf_sp = (register_t)fp;
 570         sysent = p->p_sysent;
 571         if (sysent->sv_sigcode_base != 0)
 572                 tf->tf_lr = (register_t)sysent->sv_sigcode_base;
 573         else
 574                 tf->tf_lr = (register_t)(sysent->sv_psstrings -
 575                     *(sysent->sv_szsigcode));
 576
 577         CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, tf->tf_elr,
 578             tf->tf_sp);
 579
 580         PROC_LOCK(p);
 581         mtx_lock(&psp->ps_mtx);
 582 }
 583
 584 static void
 585 init_proc0(vm_offset_t kstack)
 586 {
 587         struct pcpu *pcpup = &__pcpu[0];
 588
 589         proc_linkup0(&proc0, &thread0);
 590         thread0.td_kstack = kstack;
 591         thread0.td_pcb = (struct pcb *)(thread0.td_kstack) - 1;
 592         thread0.td_pcb->pcb_fpflags = 0;
 593         thread0.td_pcb->pcb_vfpcpu = UINT_MAX;
 594         thread0.td_frame = &proc0_tf;
 595         pcpup->pc_curpcb = thread0.td_pcb;
 596 }
 597
 598 typedef struct {
 599         uint32_t type;
 600         uint64_t phys_start;
 601         uint64_t virt_start;
 602         uint64_t num_pages;
 603         uint64_t attr;
 604 } EFI_MEMORY_DESCRIPTOR;
 605
 606 static int
 607 add_physmap_entry(uint64_t base, uint64_t length, vm_paddr_t *physmap,
 608     u_int *physmap_idxp)
 609 {
 610         u_int i, insert_idx, _physmap_idx;
 611
 612         _physmap_idx = *physmap_idxp;
 613
 614         if (length == 0)
 615                 return (1);
 616
 617         /*
 618          * Find insertion point while checking for overlap.  Start off by
 619          * assuming the new entry will be added to the end.
 620          */
 621         insert_idx = _physmap_idx;
 622         for (i = 0; i <= _physmap_idx; i += 2) {
 623                 if (base < physmap[i + 1]) {
 624                         if (base + length <= physmap[i]) {
 625                                 insert_idx = i;
 626                                 break;
 627                         }
 628                         if (boothowto & RB_VERBOSE)
 629                                 printf(
 630                     "Overlapping memory regions, ignoring second region\n");
 631                         return (1);
 632                 }
 633         }
 634
 635         /* See if we can prepend to the next entry. */
 636         if (insert_idx <= _physmap_idx &&
 637             base + length == physmap[insert_idx]) {
 638                 physmap[insert_idx] = base;
 639                 return (1);
 640         }
 641
 642         /* See if we can append to the previous entry. */
 643         if (insert_idx > 0 && base == physmap[insert_idx - 1]) {
 644                 physmap[insert_idx - 1] += length;
 645                 return (1);
 646         }
 647
 648         _physmap_idx += 2;
 649         *physmap_idxp = _physmap_idx;
 650         if (_physmap_idx == PHYSMAP_SIZE) {
 651                 printf(
 652                 "Too many segments in the physical address map, giving up\n");
 653                 return (0);
 654         }
 655
 656         /*
 657          * Move the last 'N' entries down to make room for the new
 658          * entry if needed.
 659          */
 660         for (i = _physmap_idx; i > insert_idx; i -= 2) {
 661                 physmap[i] = physmap[i - 2];
 662                 physmap[i + 1] = physmap[i - 1];
 663         }
 664
 665         /* Insert the new entry. */
 666         physmap[insert_idx] = base;
 667         physmap[insert_idx + 1] = base + length;
 668         return (1);
 669 }
 670
 671 #define efi_next_descriptor(ptr, size) \
 672         ((struct efi_md *)(((uint8_t *) ptr) + size))
 673
 674 static void
 675 add_efi_map_entries(struct efi_map_header *efihdr, vm_paddr_t *physmap,
 676     u_int *physmap_idxp)
 677 {
 678         struct efi_md *map, *p;
 679         const char *type;
 680         size_t efisz;
 681         int ndesc, i;
 682
 683         static const char *types[] = {
 684                 "Reserved",
 685                 "LoaderCode",
 686                 "LoaderData",
 687                 "BootServicesCode",
 688                 "BootServicesData",
 689                 "RuntimeServicesCode",
 690                 "RuntimeServicesData",
 691                 "ConventionalMemory",
 692                 "UnusableMemory",
 693                 "ACPIReclaimMemory",
 694                 "ACPIMemoryNVS",
 695                 "MemoryMappedIO",
 696                 "MemoryMappedIOPortSpace",
 697                 "PalCode"
 698         };
 699
 700         /*
 701          * Memory map data provided by UEFI via the GetMemoryMap
 702          * Boot Services API.
 703          */
 704         efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf;
 705         map = (struct efi_md *)((uint8_t *)efihdr + efisz);
 706
 707         if (efihdr->descriptor_size == 0)
 708                 return;
 709         ndesc = efihdr->memory_size / efihdr->descriptor_size;
 710
 711         if (boothowto & RB_VERBOSE)
 712                 printf("%23s %12s %12s %8s %4s\n",
 713                     "Type", "Physical", "Virtual", "#Pages", "Attr");
 714
 715         for (i = 0, p = map; i < ndesc; i++,
 716             p = efi_next_descriptor(p, efihdr->descriptor_size)) {
 717                 if (boothowto & RB_VERBOSE) {
 718                         if (p->md_type <= EFI_MD_TYPE_PALCODE)
 719                                 type = types[p->md_type];
 720                         else
 721                                 type = "<INVALID>";
 722                         printf("%23s %012lx %12p %08lx ", type, p->md_phys,
 723                             p->md_virt, p->md_pages);
 724                         if (p->md_attr & EFI_MD_ATTR_UC)
 725                                 printf("UC ");
 726                         if (p->md_attr & EFI_MD_ATTR_WC)
 727                                 printf("WC ");
 728                         if (p->md_attr & EFI_MD_ATTR_WT)
 729                                 printf("WT ");
 730                         if (p->md_attr & EFI_MD_ATTR_WB)
 731                                 printf("WB ");
 732                         if (p->md_attr & EFI_MD_ATTR_UCE)
 733                                 printf("UCE ");
 734                         if (p->md_attr & EFI_MD_ATTR_WP)
 735                                 printf("WP ");
 736                         if (p->md_attr & EFI_MD_ATTR_RP)
 737                                 printf("RP ");
 738                         if (p->md_attr & EFI_MD_ATTR_XP)
 739                                 printf("XP ");
 740                         if (p->md_attr & EFI_MD_ATTR_RT)
 741                                 printf("RUNTIME");
 742                         printf("\n");
 743                 }
 744
 745                 switch (p->md_type) {
 746                 case EFI_MD_TYPE_CODE:
 747                 case EFI_MD_TYPE_DATA:
 748                 case EFI_MD_TYPE_BS_CODE:
 749                 case EFI_MD_TYPE_BS_DATA:
 750                 case EFI_MD_TYPE_FREE:
 751                         /*
 752                          * We're allowed to use any entry with these types.
 753                          */
 754                         break;
 755                 default:
 756                         continue;
 757                 }
 758
 759                 if (!add_physmap_entry(p->md_phys, (p->md_pages * PAGE_SIZE),
 760                     physmap, physmap_idxp))
 761                         break;
 762         }
 763 }
 764
 765 #ifdef FDT
 766 static void
 767 try_load_dtb(caddr_t kmdp)
 768 {
 769         vm_offset_t dtbp;
 770
 771         dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t);
 772         if (dtbp == (vm_offset_t)NULL) {
 773                 printf("ERROR loading DTB\n");
 774                 return;
 775         }
 776
 777         if (OF_install(OFW_FDT, 0) == FALSE)
 778                 panic("Cannot install FDT");
 779
 780         if (OF_init((void *)dtbp) != 0)
 781                 panic("OF_init failed with the found device tree");
 782 }
 783 #endif
 784
 785 static void
 786 cache_setup(void)
 787 {
 788         int dcache_line_shift, icache_line_shift;
 789         uint32_t ctr_el0;
 790
 791         ctr_el0 = READ_SPECIALREG(ctr_el0);
 792
 793         /* Read the log2 words in each D cache line */
 794         dcache_line_shift = CTR_DLINE_SIZE(ctr_el0);
 795         /* Get the D cache line size */
 796         dcache_line_size = sizeof(int) << dcache_line_shift;
 797
 798         /* And the same for the I cache */
 799         icache_line_shift = CTR_ILINE_SIZE(ctr_el0);
 800         icache_line_size = sizeof(int) << icache_line_shift;
 801
 802         idcache_line_size = MIN(dcache_line_size, icache_line_size);
 803 }
 804
 805 void
 806 initarm(struct arm64_bootparams *abp)
 807 {
 808         struct efi_map_header *efihdr;
 809         struct pcpu *pcpup;
 810         vm_offset_t lastaddr;
 811         caddr_t kmdp;
 812         vm_paddr_t mem_len;
 813         int i;
 814
 815         /* Set the module data location */
 816         preload_metadata = (caddr_t)(uintptr_t)(abp->modulep);
 817
 818         /* Find the kernel address */
 819         kmdp = preload_search_by_type("elf kernel");
 820         if (kmdp == NULL)
 821                 kmdp = preload_search_by_type("elf64 kernel");
 822
 823         boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
 824         init_static_kenv(MD_FETCH(kmdp, MODINFOMD_ENVP, char *), 0);
 825
 826 #ifdef FDT
 827         try_load_dtb(kmdp);
 828 #endif
 829
 830         /* Find the address to start allocating from */
 831         lastaddr = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
 832
 833         /* Load the physical memory ranges */
 834         physmap_idx = 0;
 835         efihdr = (struct efi_map_header *)preload_search_info(kmdp,
 836             MODINFO_METADATA | MODINFOMD_EFI_MAP);
 837         add_efi_map_entries(efihdr, physmap, &physmap_idx);
 838
 839         /* Print the memory map */
 840         mem_len = 0;
 841         for (i = 0; i < physmap_idx; i += 2) {
 842                 dump_avail[i] = physmap[i];
 843                 dump_avail[i + 1] = physmap[i + 1];
 844                 mem_len += physmap[i + 1] - physmap[i];
 845         }
 846         dump_avail[i] = 0;
 847         dump_avail[i + 1] = 0;
 848
 849         /* Set the pcpu data, this is needed by pmap_bootstrap */
 850         pcpup = &__pcpu[0];
 851         pcpu_init(pcpup, 0, sizeof(struct pcpu));
 852
 853         /*
 854          * Set the pcpu pointer with a backup in tpidr_el1 to be
 855          * loaded when entering the kernel from userland.
 856          */
 857         __asm __volatile(
 858             "mov x18, %0 \n"
 859             "msr tpidr_el1, %0" :: "r"(pcpup));
 860
 861         PCPU_SET(curthread, &thread0);
 862
 863         /* Do basic tuning, hz etc */
 864         init_param1();
 865
 866         cache_setup();
 867
 868         /* Bootstrap enough of pmap  to enter the kernel proper */
 869         pmap_bootstrap(abp->kern_l1pt, KERNBASE - abp->kern_delta,
 870             lastaddr - KERNBASE);
 871
 872         arm_devmap_bootstrap(0, NULL);
 873
 874         cninit();
 875
 876         init_proc0(abp->kern_stack);
 877         msgbufinit(msgbufp, msgbufsize);
 878         mutex_init();
 879         init_param2(physmem);
 880
 881         dbg_monitor_init();
 882         kdb_init();
 883
 884         early_boot = 0;
 885 }
 886
 887 uint32_t (*arm_cpu_fill_vdso_timehands)(struct vdso_timehands *,
 888     struct timecounter *);
 889
 890 uint32_t
 891 cpu_fill_vdso_timehands(struct vdso_timehands *vdso_th, struct timecounter *tc)
 892 {
 893
 894         return (arm_cpu_fill_vdso_timehands != NULL ?
 895             arm_cpu_fill_vdso_timehands(vdso_th, tc) : 0);
 896 }
 897
 898 #ifdef DDB
 899 #include <ddb/ddb.h>
 900
 901 DB_SHOW_COMMAND(specialregs, db_show_spregs)
 902 {
 903 #define PRINT_REG(reg)  \
 904     db_printf(__STRING(reg) " = %#016lx\n", READ_SPECIALREG(reg))
 905
 906         PRINT_REG(actlr_el1);
 907         PRINT_REG(afsr0_el1);
 908         PRINT_REG(afsr1_el1);
 909         PRINT_REG(aidr_el1);
 910         PRINT_REG(amair_el1);
 911         PRINT_REG(ccsidr_el1);
 912         PRINT_REG(clidr_el1);
 913         PRINT_REG(contextidr_el1);
 914         PRINT_REG(cpacr_el1);
 915         PRINT_REG(csselr_el1);
 916         PRINT_REG(ctr_el0);
 917         PRINT_REG(currentel);
 918         PRINT_REG(daif);
 919         PRINT_REG(dczid_el0);
 920         PRINT_REG(elr_el1);
 921         PRINT_REG(esr_el1);
 922         PRINT_REG(far_el1);
 923 #if 0
 924         /* ARM64TODO: Enable VFP before reading floating-point registers */
 925         PRINT_REG(fpcr);
 926         PRINT_REG(fpsr);
 927 #endif
 928         PRINT_REG(id_aa64afr0_el1);
 929         PRINT_REG(id_aa64afr1_el1);
 930         PRINT_REG(id_aa64dfr0_el1);
 931         PRINT_REG(id_aa64dfr1_el1);
 932         PRINT_REG(id_aa64isar0_el1);
 933         PRINT_REG(id_aa64isar1_el1);
 934         PRINT_REG(id_aa64pfr0_el1);
 935         PRINT_REG(id_aa64pfr1_el1);
 936         PRINT_REG(id_afr0_el1);
 937         PRINT_REG(id_dfr0_el1);
 938         PRINT_REG(id_isar0_el1);
 939         PRINT_REG(id_isar1_el1);
 940         PRINT_REG(id_isar2_el1);
 941         PRINT_REG(id_isar3_el1);
 942         PRINT_REG(id_isar4_el1);
 943         PRINT_REG(id_isar5_el1);
 944         PRINT_REG(id_mmfr0_el1);
 945         PRINT_REG(id_mmfr1_el1);
 946         PRINT_REG(id_mmfr2_el1);
 947         PRINT_REG(id_mmfr3_el1);
 948 #if 0
 949         /* Missing from llvm */
 950         PRINT_REG(id_mmfr4_el1);
 951 #endif
 952         PRINT_REG(id_pfr0_el1);
 953         PRINT_REG(id_pfr1_el1);
 954         PRINT_REG(isr_el1);
 955         PRINT_REG(mair_el1);
 956         PRINT_REG(midr_el1);
 957         PRINT_REG(mpidr_el1);
 958         PRINT_REG(mvfr0_el1);
 959         PRINT_REG(mvfr1_el1);
 960         PRINT_REG(mvfr2_el1);
 961         PRINT_REG(revidr_el1);
 962         PRINT_REG(sctlr_el1);
 963         PRINT_REG(sp_el0);
 964         PRINT_REG(spsel);
 965         PRINT_REG(spsr_el1);
 966         PRINT_REG(tcr_el1);
 967         PRINT_REG(tpidr_el0);
 968         PRINT_REG(tpidr_el1);
 969         PRINT_REG(tpidrro_el0);
 970         PRINT_REG(ttbr0_el1);
 971         PRINT_REG(ttbr1_el1);
 972         PRINT_REG(vbar_el1);
 973 #undef PRINT_REG
 974 }
 975
 976 DB_SHOW_COMMAND(vtop, db_show_vtop)
 977 {
 978         uint64_t phys;
 979
 980         if (have_addr) {
 981                 phys = arm64_address_translate_s1e1r(addr);
 982                 db_printf("Physical address reg: 0x%016lx\n", phys);
 983         } else
 984                 db_printf("show vtop <virt_addr>\n");
 985 }
 986 #endif