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