machdep.c revision 317003
1/* $NetBSD: arm32_machdep.c,v 1.44 2004/03/24 15:34:47 atatat Exp $ */ 2 3/*- 4 * Copyright (c) 2004 Olivier Houchard 5 * Copyright (c) 1994-1998 Mark Brinicombe. 6 * Copyright (c) 1994 Brini. 7 * All rights reserved. 8 * 9 * This code is derived from software written for Brini by Mark Brinicombe 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by Mark Brinicombe 22 * for the NetBSD Project. 23 * 4. The name of the company nor the name of the author may be used to 24 * endorse or promote products derived from this software without specific 25 * prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 28 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 29 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 30 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 31 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 32 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 33 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * Machine dependent functions for kernel setup 40 * 41 * Created : 17/09/94 42 * Updated : 18/04/01 updated for new wscons 43 */ 44 45#include "opt_compat.h" 46#include "opt_ddb.h" 47#include "opt_kstack_pages.h" 48#include "opt_platform.h" 49#include "opt_sched.h" 50#include "opt_timer.h" 51 52#include <sys/cdefs.h> 53__FBSDID("$FreeBSD: stable/11/sys/arm/arm/machdep.c 317003 2017-04-16 06:51:06Z mmel $"); 54 55#include <sys/param.h> 56#include <sys/proc.h> 57#include <sys/systm.h> 58#include <sys/bio.h> 59#include <sys/buf.h> 60#include <sys/bus.h> 61#include <sys/cons.h> 62#include <sys/cpu.h> 63#include <sys/ctype.h> 64#include <sys/devmap.h> 65#include <sys/efi.h> 66#include <sys/exec.h> 67#include <sys/imgact.h> 68#include <sys/kdb.h> 69#include <sys/kernel.h> 70#include <sys/ktr.h> 71#include <sys/linker.h> 72#include <sys/lock.h> 73#include <sys/malloc.h> 74#include <sys/msgbuf.h> 75#include <sys/mutex.h> 76#include <sys/pcpu.h> 77#include <sys/ptrace.h> 78#include <sys/reboot.h> 79#if defined(LINUX_BOOT_ABI) 80#include <sys/boot.h> 81#endif 82#include <sys/rwlock.h> 83#include <sys/sched.h> 84#include <sys/signalvar.h> 85#include <sys/syscallsubr.h> 86#include <sys/sysctl.h> 87#include <sys/sysent.h> 88#include <sys/sysproto.h> 89#include <sys/uio.h> 90#include <sys/vdso.h> 91 92#include <vm/vm.h> 93#include <vm/pmap.h> 94#include <vm/vm_map.h> 95#include <vm/vm_object.h> 96#include <vm/vm_page.h> 97#include <vm/vm_pager.h> 98 99#include <machine/armreg.h> 100#include <machine/atags.h> 101#include <machine/cpu.h> 102#include <machine/cpuinfo.h> 103#include <machine/debug_monitor.h> 104#include <machine/db_machdep.h> 105#include <machine/frame.h> 106#include <machine/intr.h> 107#include <machine/machdep.h> 108#include <machine/md_var.h> 109#include <machine/metadata.h> 110#include <machine/pcb.h> 111#include <machine/physmem.h> 112#include <machine/platform.h> 113#include <machine/reg.h> 114#include <machine/trap.h> 115#include <machine/undefined.h> 116#include <machine/vfp.h> 117#include <machine/vmparam.h> 118#include <machine/sysarch.h> 119 120#ifdef FDT 121#include <contrib/libfdt/libfdt.h> 122#include <dev/fdt/fdt_common.h> 123#include <dev/ofw/openfirm.h> 124#endif 125 126#ifdef DDB 127#include <ddb/ddb.h> 128 129#if __ARM_ARCH >= 6 130 131DB_SHOW_COMMAND(cp15, db_show_cp15) 132{ 133 u_int reg; 134 135 reg = cp15_midr_get(); 136 db_printf("Cpu ID: 0x%08x\n", reg); 137 reg = cp15_ctr_get(); 138 db_printf("Current Cache Lvl ID: 0x%08x\n",reg); 139 140 reg = cp15_sctlr_get(); 141 db_printf("Ctrl: 0x%08x\n",reg); 142 reg = cp15_actlr_get(); 143 db_printf("Aux Ctrl: 0x%08x\n",reg); 144 145 reg = cp15_id_pfr0_get(); 146 db_printf("Processor Feat 0: 0x%08x\n", reg); 147 reg = cp15_id_pfr1_get(); 148 db_printf("Processor Feat 1: 0x%08x\n", reg); 149 reg = cp15_id_dfr0_get(); 150 db_printf("Debug Feat 0: 0x%08x\n", reg); 151 reg = cp15_id_afr0_get(); 152 db_printf("Auxiliary Feat 0: 0x%08x\n", reg); 153 reg = cp15_id_mmfr0_get(); 154 db_printf("Memory Model Feat 0: 0x%08x\n", reg); 155 reg = cp15_id_mmfr1_get(); 156 db_printf("Memory Model Feat 1: 0x%08x\n", reg); 157 reg = cp15_id_mmfr2_get(); 158 db_printf("Memory Model Feat 2: 0x%08x\n", reg); 159 reg = cp15_id_mmfr3_get(); 160 db_printf("Memory Model Feat 3: 0x%08x\n", reg); 161 reg = cp15_ttbr_get(); 162 db_printf("TTB0: 0x%08x\n", reg); 163} 164 165DB_SHOW_COMMAND(vtop, db_show_vtop) 166{ 167 u_int reg; 168 169 if (have_addr) { 170 cp15_ats1cpr_set(addr); 171 reg = cp15_par_get(); 172 db_printf("Physical address reg: 0x%08x\n",reg); 173 } else 174 db_printf("show vtop <virt_addr>\n"); 175} 176#endif /* __ARM_ARCH >= 6 */ 177#endif /* DDB */ 178 179#ifdef DEBUG 180#define debugf(fmt, args...) printf(fmt, ##args) 181#else 182#define debugf(fmt, args...) 183#endif 184 185#if defined(COMPAT_FREEBSD4) || defined(COMPAT_FREEBSD5) || \ 186 defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD7) || \ 187 defined(COMPAT_FREEBSD9) 188#error FreeBSD/arm doesn't provide compatibility with releases prior to 10 189#endif 190 191struct pcpu __pcpu[MAXCPU]; 192struct pcpu *pcpup = &__pcpu[0]; 193 194static struct trapframe proc0_tf; 195uint32_t cpu_reset_address = 0; 196int cold = 1; 197vm_offset_t vector_page; 198 199int (*_arm_memcpy)(void *, void *, int, int) = NULL; 200int (*_arm_bzero)(void *, int, int) = NULL; 201int _min_memcpy_size = 0; 202int _min_bzero_size = 0; 203 204extern int *end; 205 206#ifdef FDT 207static char *loader_envp; 208 209vm_paddr_t pmap_pa; 210 211#if __ARM_ARCH >= 6 212vm_offset_t systempage; 213vm_offset_t irqstack; 214vm_offset_t undstack; 215vm_offset_t abtstack; 216#else 217/* 218 * This is the number of L2 page tables required for covering max 219 * (hypothetical) memsize of 4GB and all kernel mappings (vectors, msgbuf, 220 * stacks etc.), uprounded to be divisible by 4. 221 */ 222#define KERNEL_PT_MAX 78 223 224static struct pv_addr kernel_pt_table[KERNEL_PT_MAX]; 225 226struct pv_addr systempage; 227static struct pv_addr msgbufpv; 228struct pv_addr irqstack; 229struct pv_addr undstack; 230struct pv_addr abtstack; 231static struct pv_addr kernelstack; 232#endif 233#endif 234 235#if defined(LINUX_BOOT_ABI) 236#define LBABI_MAX_BANKS 10 237 238#define CMDLINE_GUARD "FreeBSD:" 239uint32_t board_id; 240struct arm_lbabi_tag *atag_list; 241char linux_command_line[LBABI_MAX_COMMAND_LINE + 1]; 242char atags[LBABI_MAX_COMMAND_LINE * 2]; 243uint32_t memstart[LBABI_MAX_BANKS]; 244uint32_t memsize[LBABI_MAX_BANKS]; 245uint32_t membanks; 246#endif 247#ifdef MULTIDELAY 248static delay_func *delay_impl; 249static void *delay_arg; 250#endif 251 252static uint32_t board_revision; 253/* hex representation of uint64_t */ 254static char board_serial[32]; 255 256SYSCTL_NODE(_hw, OID_AUTO, board, CTLFLAG_RD, 0, "Board attributes"); 257SYSCTL_UINT(_hw_board, OID_AUTO, revision, CTLFLAG_RD, 258 &board_revision, 0, "Board revision"); 259SYSCTL_STRING(_hw_board, OID_AUTO, serial, CTLFLAG_RD, 260 board_serial, 0, "Board serial"); 261 262int vfp_exists; 263SYSCTL_INT(_hw, HW_FLOATINGPT, floatingpoint, CTLFLAG_RD, 264 &vfp_exists, 0, "Floating point support enabled"); 265 266void 267board_set_serial(uint64_t serial) 268{ 269 270 snprintf(board_serial, sizeof(board_serial)-1, 271 "%016jx", serial); 272} 273 274void 275board_set_revision(uint32_t revision) 276{ 277 278 board_revision = revision; 279} 280 281void 282sendsig(catcher, ksi, mask) 283 sig_t catcher; 284 ksiginfo_t *ksi; 285 sigset_t *mask; 286{ 287 struct thread *td; 288 struct proc *p; 289 struct trapframe *tf; 290 struct sigframe *fp, frame; 291 struct sigacts *psp; 292 struct sysentvec *sysent; 293 int onstack; 294 int sig; 295 int code; 296 297 td = curthread; 298 p = td->td_proc; 299 PROC_LOCK_ASSERT(p, MA_OWNED); 300 sig = ksi->ksi_signo; 301 code = ksi->ksi_code; 302 psp = p->p_sigacts; 303 mtx_assert(&psp->ps_mtx, MA_OWNED); 304 tf = td->td_frame; 305 onstack = sigonstack(tf->tf_usr_sp); 306 307 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm, 308 catcher, sig); 309 310 /* Allocate and validate space for the signal handler context. */ 311 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !(onstack) && 312 SIGISMEMBER(psp->ps_sigonstack, sig)) { 313 fp = (struct sigframe *)((uintptr_t)td->td_sigstk.ss_sp + 314 td->td_sigstk.ss_size); 315#if defined(COMPAT_43) 316 td->td_sigstk.ss_flags |= SS_ONSTACK; 317#endif 318 } else 319 fp = (struct sigframe *)td->td_frame->tf_usr_sp; 320 321 /* make room on the stack */ 322 fp--; 323 324 /* make the stack aligned */ 325 fp = (struct sigframe *)STACKALIGN(fp); 326 /* Populate the siginfo frame. */ 327 get_mcontext(td, &frame.sf_uc.uc_mcontext, 0); 328 frame.sf_si = ksi->ksi_info; 329 frame.sf_uc.uc_sigmask = *mask; 330 frame.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK ) 331 ? ((onstack) ? SS_ONSTACK : 0) : SS_DISABLE; 332 frame.sf_uc.uc_stack = td->td_sigstk; 333 mtx_unlock(&psp->ps_mtx); 334 PROC_UNLOCK(td->td_proc); 335 336 /* Copy the sigframe out to the user's stack. */ 337 if (copyout(&frame, fp, sizeof(*fp)) != 0) { 338 /* Process has trashed its stack. Kill it. */ 339 CTR2(KTR_SIG, "sendsig: sigexit td=%p fp=%p", td, fp); 340 PROC_LOCK(p); 341 sigexit(td, SIGILL); 342 } 343 344 /* 345 * Build context to run handler in. We invoke the handler 346 * directly, only returning via the trampoline. Note the 347 * trampoline version numbers are coordinated with machine- 348 * dependent code in libc. 349 */ 350 351 tf->tf_r0 = sig; 352 tf->tf_r1 = (register_t)&fp->sf_si; 353 tf->tf_r2 = (register_t)&fp->sf_uc; 354 355 /* the trampoline uses r5 as the uc address */ 356 tf->tf_r5 = (register_t)&fp->sf_uc; 357 tf->tf_pc = (register_t)catcher; 358 tf->tf_usr_sp = (register_t)fp; 359 sysent = p->p_sysent; 360 if (sysent->sv_sigcode_base != 0) 361 tf->tf_usr_lr = (register_t)sysent->sv_sigcode_base; 362 else 363 tf->tf_usr_lr = (register_t)(sysent->sv_psstrings - 364 *(sysent->sv_szsigcode)); 365 /* Set the mode to enter in the signal handler */ 366#if __ARM_ARCH >= 7 367 if ((register_t)catcher & 1) 368 tf->tf_spsr |= PSR_T; 369 else 370 tf->tf_spsr &= ~PSR_T; 371#endif 372 373 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, tf->tf_usr_lr, 374 tf->tf_usr_sp); 375 376 PROC_LOCK(p); 377 mtx_lock(&psp->ps_mtx); 378} 379 380struct kva_md_info kmi; 381 382/* 383 * arm32_vector_init: 384 * 385 * Initialize the vector page, and select whether or not to 386 * relocate the vectors. 387 * 388 * NOTE: We expect the vector page to be mapped at its expected 389 * destination. 390 */ 391 392extern unsigned int page0[], page0_data[]; 393void 394arm_vector_init(vm_offset_t va, int which) 395{ 396 unsigned int *vectors = (int *) va; 397 unsigned int *vectors_data = vectors + (page0_data - page0); 398 int vec; 399 400 /* 401 * Loop through the vectors we're taking over, and copy the 402 * vector's insn and data word. 403 */ 404 for (vec = 0; vec < ARM_NVEC; vec++) { 405 if ((which & (1 << vec)) == 0) { 406 /* Don't want to take over this vector. */ 407 continue; 408 } 409 vectors[vec] = page0[vec]; 410 vectors_data[vec] = page0_data[vec]; 411 } 412 413 /* Now sync the vectors. */ 414 icache_sync(va, (ARM_NVEC * 2) * sizeof(u_int)); 415 416 vector_page = va; 417#if __ARM_ARCH < 6 418 if (va == ARM_VECTORS_HIGH) { 419 /* 420 * Enable high vectors in the system control reg (SCTLR). 421 * 422 * Assume the MD caller knows what it's doing here, and really 423 * does want the vector page relocated. 424 * 425 * Note: This has to be done here (and not just in 426 * cpu_setup()) because the vector page needs to be 427 * accessible *before* cpu_startup() is called. 428 * Think ddb(9) ... 429 */ 430 cpu_control(CPU_CONTROL_VECRELOC, CPU_CONTROL_VECRELOC); 431 } 432#endif 433} 434 435static void 436cpu_startup(void *dummy) 437{ 438 struct pcb *pcb = thread0.td_pcb; 439 const unsigned int mbyte = 1024 * 1024; 440#if __ARM_ARCH < 6 && !defined(ARM_CACHE_LOCK_ENABLE) 441 vm_page_t m; 442#endif 443 444 identify_arm_cpu(); 445 446 vm_ksubmap_init(&kmi); 447 448 /* 449 * Display the RAM layout. 450 */ 451 printf("real memory = %ju (%ju MB)\n", 452 (uintmax_t)arm32_ptob(realmem), 453 (uintmax_t)arm32_ptob(realmem) / mbyte); 454 printf("avail memory = %ju (%ju MB)\n", 455 (uintmax_t)arm32_ptob(vm_cnt.v_free_count), 456 (uintmax_t)arm32_ptob(vm_cnt.v_free_count) / mbyte); 457 if (bootverbose) { 458 arm_physmem_print_tables(); 459 devmap_print_table(); 460 } 461 462 bufinit(); 463 vm_pager_bufferinit(); 464 pcb->pcb_regs.sf_sp = (u_int)thread0.td_kstack + 465 USPACE_SVC_STACK_TOP; 466 pmap_set_pcb_pagedir(kernel_pmap, pcb); 467#if __ARM_ARCH < 6 468 vector_page_setprot(VM_PROT_READ); 469 pmap_postinit(); 470#ifdef ARM_CACHE_LOCK_ENABLE 471 pmap_kenter_user(ARM_TP_ADDRESS, ARM_TP_ADDRESS); 472 arm_lock_cache_line(ARM_TP_ADDRESS); 473#else 474 m = vm_page_alloc(NULL, 0, VM_ALLOC_NOOBJ | VM_ALLOC_ZERO); 475 pmap_kenter_user(ARM_TP_ADDRESS, VM_PAGE_TO_PHYS(m)); 476#endif 477 *(uint32_t *)ARM_RAS_START = 0; 478 *(uint32_t *)ARM_RAS_END = 0xffffffff; 479#endif 480} 481 482SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL); 483 484/* 485 * Flush the D-cache for non-DMA I/O so that the I-cache can 486 * be made coherent later. 487 */ 488void 489cpu_flush_dcache(void *ptr, size_t len) 490{ 491 492 dcache_wb_poc((vm_offset_t)ptr, (vm_paddr_t)vtophys(ptr), len); 493} 494 495/* Get current clock frequency for the given cpu id. */ 496int 497cpu_est_clockrate(int cpu_id, uint64_t *rate) 498{ 499 500 return (ENXIO); 501} 502 503void 504cpu_idle(int busy) 505{ 506 507 CTR2(KTR_SPARE2, "cpu_idle(%d) at %d", busy, curcpu); 508 spinlock_enter(); 509#ifndef NO_EVENTTIMERS 510 if (!busy) 511 cpu_idleclock(); 512#endif 513 if (!sched_runnable()) 514 cpu_sleep(0); 515#ifndef NO_EVENTTIMERS 516 if (!busy) 517 cpu_activeclock(); 518#endif 519 spinlock_exit(); 520 CTR2(KTR_SPARE2, "cpu_idle(%d) at %d done", busy, curcpu); 521} 522 523int 524cpu_idle_wakeup(int cpu) 525{ 526 527 return (0); 528} 529 530/* 531 * Most ARM platforms don't need to do anything special to init their clocks 532 * (they get intialized during normal device attachment), and by not defining a 533 * cpu_initclocks() function they get this generic one. Any platform that needs 534 * to do something special can just provide their own implementation, which will 535 * override this one due to the weak linkage. 536 */ 537void 538arm_generic_initclocks(void) 539{ 540 541#ifndef NO_EVENTTIMERS 542#ifdef SMP 543 if (PCPU_GET(cpuid) == 0) 544 cpu_initclocks_bsp(); 545 else 546 cpu_initclocks_ap(); 547#else 548 cpu_initclocks_bsp(); 549#endif 550#endif 551} 552__weak_reference(arm_generic_initclocks, cpu_initclocks); 553 554#ifdef MULTIDELAY 555void 556arm_set_delay(delay_func *impl, void *arg) 557{ 558 559 KASSERT(impl != NULL, ("No DELAY implementation")); 560 delay_impl = impl; 561 delay_arg = arg; 562} 563 564void 565DELAY(int usec) 566{ 567 568 delay_impl(usec, delay_arg); 569} 570#endif 571 572int 573fill_regs(struct thread *td, struct reg *regs) 574{ 575 struct trapframe *tf = td->td_frame; 576 bcopy(&tf->tf_r0, regs->r, sizeof(regs->r)); 577 regs->r_sp = tf->tf_usr_sp; 578 regs->r_lr = tf->tf_usr_lr; 579 regs->r_pc = tf->tf_pc; 580 regs->r_cpsr = tf->tf_spsr; 581 return (0); 582} 583int 584fill_fpregs(struct thread *td, struct fpreg *regs) 585{ 586 bzero(regs, sizeof(*regs)); 587 return (0); 588} 589 590int 591set_regs(struct thread *td, struct reg *regs) 592{ 593 struct trapframe *tf = td->td_frame; 594 595 bcopy(regs->r, &tf->tf_r0, sizeof(regs->r)); 596 tf->tf_usr_sp = regs->r_sp; 597 tf->tf_usr_lr = regs->r_lr; 598 tf->tf_pc = regs->r_pc; 599 tf->tf_spsr &= ~PSR_FLAGS; 600 tf->tf_spsr |= regs->r_cpsr & PSR_FLAGS; 601 return (0); 602} 603 604int 605set_fpregs(struct thread *td, struct fpreg *regs) 606{ 607 return (0); 608} 609 610int 611fill_dbregs(struct thread *td, struct dbreg *regs) 612{ 613 return (0); 614} 615int 616set_dbregs(struct thread *td, struct dbreg *regs) 617{ 618 return (0); 619} 620 621 622static int 623ptrace_read_int(struct thread *td, vm_offset_t addr, uint32_t *v) 624{ 625 626 if (proc_readmem(td, td->td_proc, addr, v, sizeof(*v)) != sizeof(*v)) 627 return (ENOMEM); 628 return (0); 629} 630 631static int 632ptrace_write_int(struct thread *td, vm_offset_t addr, uint32_t v) 633{ 634 635 if (proc_writemem(td, td->td_proc, addr, &v, sizeof(v)) != sizeof(v)) 636 return (ENOMEM); 637 return (0); 638} 639 640static u_int 641ptrace_get_usr_reg(void *cookie, int reg) 642{ 643 int ret; 644 struct thread *td = cookie; 645 646 KASSERT(((reg >= 0) && (reg <= ARM_REG_NUM_PC)), 647 ("reg is outside range")); 648 649 switch(reg) { 650 case ARM_REG_NUM_PC: 651 ret = td->td_frame->tf_pc; 652 break; 653 case ARM_REG_NUM_LR: 654 ret = td->td_frame->tf_usr_lr; 655 break; 656 case ARM_REG_NUM_SP: 657 ret = td->td_frame->tf_usr_sp; 658 break; 659 default: 660 ret = *((register_t*)&td->td_frame->tf_r0 + reg); 661 break; 662 } 663 664 return (ret); 665} 666 667static u_int 668ptrace_get_usr_int(void* cookie, vm_offset_t offset, u_int* val) 669{ 670 struct thread *td = cookie; 671 u_int error; 672 673 error = ptrace_read_int(td, offset, val); 674 675 return (error); 676} 677 678/** 679 * This function parses current instruction opcode and decodes 680 * any possible jump (change in PC) which might occur after 681 * the instruction is executed. 682 * 683 * @param td Thread structure of analysed task 684 * @param cur_instr Currently executed instruction 685 * @param alt_next_address Pointer to the variable where 686 * the destination address of the 687 * jump instruction shall be stored. 688 * 689 * @return <0> when jump is possible 690 * <EINVAL> otherwise 691 */ 692static int 693ptrace_get_alternative_next(struct thread *td, uint32_t cur_instr, 694 uint32_t *alt_next_address) 695{ 696 int error; 697 698 if (inst_branch(cur_instr) || inst_call(cur_instr) || 699 inst_return(cur_instr)) { 700 error = arm_predict_branch(td, cur_instr, td->td_frame->tf_pc, 701 alt_next_address, ptrace_get_usr_reg, ptrace_get_usr_int); 702 703 return (error); 704 } 705 706 return (EINVAL); 707} 708 709int 710ptrace_single_step(struct thread *td) 711{ 712 struct proc *p; 713 int error, error_alt; 714 uint32_t cur_instr, alt_next = 0; 715 716 /* TODO: This needs to be updated for Thumb-2 */ 717 if ((td->td_frame->tf_spsr & PSR_T) != 0) 718 return (EINVAL); 719 720 KASSERT(td->td_md.md_ptrace_instr == 0, 721 ("Didn't clear single step")); 722 KASSERT(td->td_md.md_ptrace_instr_alt == 0, 723 ("Didn't clear alternative single step")); 724 p = td->td_proc; 725 PROC_UNLOCK(p); 726 727 error = ptrace_read_int(td, td->td_frame->tf_pc, 728 &cur_instr); 729 if (error) 730 goto out; 731 732 error = ptrace_read_int(td, td->td_frame->tf_pc + INSN_SIZE, 733 &td->td_md.md_ptrace_instr); 734 if (error == 0) { 735 error = ptrace_write_int(td, td->td_frame->tf_pc + INSN_SIZE, 736 PTRACE_BREAKPOINT); 737 if (error) { 738 td->td_md.md_ptrace_instr = 0; 739 } else { 740 td->td_md.md_ptrace_addr = td->td_frame->tf_pc + 741 INSN_SIZE; 742 } 743 } 744 745 error_alt = ptrace_get_alternative_next(td, cur_instr, &alt_next); 746 if (error_alt == 0) { 747 error_alt = ptrace_read_int(td, alt_next, 748 &td->td_md.md_ptrace_instr_alt); 749 if (error_alt) { 750 td->td_md.md_ptrace_instr_alt = 0; 751 } else { 752 error_alt = ptrace_write_int(td, alt_next, 753 PTRACE_BREAKPOINT); 754 if (error_alt) 755 td->td_md.md_ptrace_instr_alt = 0; 756 else 757 td->td_md.md_ptrace_addr_alt = alt_next; 758 } 759 } 760 761out: 762 PROC_LOCK(p); 763 return ((error != 0) && (error_alt != 0)); 764} 765 766int 767ptrace_clear_single_step(struct thread *td) 768{ 769 struct proc *p; 770 771 /* TODO: This needs to be updated for Thumb-2 */ 772 if ((td->td_frame->tf_spsr & PSR_T) != 0) 773 return (EINVAL); 774 775 if (td->td_md.md_ptrace_instr != 0) { 776 p = td->td_proc; 777 PROC_UNLOCK(p); 778 ptrace_write_int(td, td->td_md.md_ptrace_addr, 779 td->td_md.md_ptrace_instr); 780 PROC_LOCK(p); 781 td->td_md.md_ptrace_instr = 0; 782 } 783 784 if (td->td_md.md_ptrace_instr_alt != 0) { 785 p = td->td_proc; 786 PROC_UNLOCK(p); 787 ptrace_write_int(td, td->td_md.md_ptrace_addr_alt, 788 td->td_md.md_ptrace_instr_alt); 789 PROC_LOCK(p); 790 td->td_md.md_ptrace_instr_alt = 0; 791 } 792 793 return (0); 794} 795 796int 797ptrace_set_pc(struct thread *td, unsigned long addr) 798{ 799 td->td_frame->tf_pc = addr; 800 return (0); 801} 802 803void 804cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size) 805{ 806} 807 808void 809spinlock_enter(void) 810{ 811 struct thread *td; 812 register_t cspr; 813 814 td = curthread; 815 if (td->td_md.md_spinlock_count == 0) { 816 cspr = disable_interrupts(PSR_I | PSR_F); 817 td->td_md.md_spinlock_count = 1; 818 td->td_md.md_saved_cspr = cspr; 819 } else 820 td->td_md.md_spinlock_count++; 821 critical_enter(); 822} 823 824void 825spinlock_exit(void) 826{ 827 struct thread *td; 828 register_t cspr; 829 830 td = curthread; 831 critical_exit(); 832 cspr = td->td_md.md_saved_cspr; 833 td->td_md.md_spinlock_count--; 834 if (td->td_md.md_spinlock_count == 0) 835 restore_interrupts(cspr); 836} 837 838/* 839 * Clear registers on exec 840 */ 841void 842exec_setregs(struct thread *td, struct image_params *imgp, u_long stack) 843{ 844 struct trapframe *tf = td->td_frame; 845 846 memset(tf, 0, sizeof(*tf)); 847 tf->tf_usr_sp = stack; 848 tf->tf_usr_lr = imgp->entry_addr; 849 tf->tf_svc_lr = 0x77777777; 850 tf->tf_pc = imgp->entry_addr; 851 tf->tf_spsr = PSR_USR32_MODE; 852} 853 854/* 855 * Get machine context. 856 */ 857int 858get_mcontext(struct thread *td, mcontext_t *mcp, int clear_ret) 859{ 860 struct trapframe *tf = td->td_frame; 861 __greg_t *gr = mcp->__gregs; 862 863 if (clear_ret & GET_MC_CLEAR_RET) { 864 gr[_REG_R0] = 0; 865 gr[_REG_CPSR] = tf->tf_spsr & ~PSR_C; 866 } else { 867 gr[_REG_R0] = tf->tf_r0; 868 gr[_REG_CPSR] = tf->tf_spsr; 869 } 870 gr[_REG_R1] = tf->tf_r1; 871 gr[_REG_R2] = tf->tf_r2; 872 gr[_REG_R3] = tf->tf_r3; 873 gr[_REG_R4] = tf->tf_r4; 874 gr[_REG_R5] = tf->tf_r5; 875 gr[_REG_R6] = tf->tf_r6; 876 gr[_REG_R7] = tf->tf_r7; 877 gr[_REG_R8] = tf->tf_r8; 878 gr[_REG_R9] = tf->tf_r9; 879 gr[_REG_R10] = tf->tf_r10; 880 gr[_REG_R11] = tf->tf_r11; 881 gr[_REG_R12] = tf->tf_r12; 882 gr[_REG_SP] = tf->tf_usr_sp; 883 gr[_REG_LR] = tf->tf_usr_lr; 884 gr[_REG_PC] = tf->tf_pc; 885 886 return (0); 887} 888 889/* 890 * Set machine context. 891 * 892 * However, we don't set any but the user modifiable flags, and we won't 893 * touch the cs selector. 894 */ 895int 896set_mcontext(struct thread *td, mcontext_t *mcp) 897{ 898 struct trapframe *tf = td->td_frame; 899 const __greg_t *gr = mcp->__gregs; 900 901 tf->tf_r0 = gr[_REG_R0]; 902 tf->tf_r1 = gr[_REG_R1]; 903 tf->tf_r2 = gr[_REG_R2]; 904 tf->tf_r3 = gr[_REG_R3]; 905 tf->tf_r4 = gr[_REG_R4]; 906 tf->tf_r5 = gr[_REG_R5]; 907 tf->tf_r6 = gr[_REG_R6]; 908 tf->tf_r7 = gr[_REG_R7]; 909 tf->tf_r8 = gr[_REG_R8]; 910 tf->tf_r9 = gr[_REG_R9]; 911 tf->tf_r10 = gr[_REG_R10]; 912 tf->tf_r11 = gr[_REG_R11]; 913 tf->tf_r12 = gr[_REG_R12]; 914 tf->tf_usr_sp = gr[_REG_SP]; 915 tf->tf_usr_lr = gr[_REG_LR]; 916 tf->tf_pc = gr[_REG_PC]; 917 tf->tf_spsr = gr[_REG_CPSR]; 918 919 return (0); 920} 921 922/* 923 * MPSAFE 924 */ 925int 926sys_sigreturn(td, uap) 927 struct thread *td; 928 struct sigreturn_args /* { 929 const struct __ucontext *sigcntxp; 930 } */ *uap; 931{ 932 ucontext_t uc; 933 int spsr; 934 935 if (uap == NULL) 936 return (EFAULT); 937 if (copyin(uap->sigcntxp, &uc, sizeof(uc))) 938 return (EFAULT); 939 /* 940 * Make sure the processor mode has not been tampered with and 941 * interrupts have not been disabled. 942 */ 943 spsr = uc.uc_mcontext.__gregs[_REG_CPSR]; 944 if ((spsr & PSR_MODE) != PSR_USR32_MODE || 945 (spsr & (PSR_I | PSR_F)) != 0) 946 return (EINVAL); 947 /* Restore register context. */ 948 set_mcontext(td, &uc.uc_mcontext); 949 950 /* Restore signal mask. */ 951 kern_sigprocmask(td, SIG_SETMASK, &uc.uc_sigmask, NULL, 0); 952 953 return (EJUSTRETURN); 954} 955 956 957/* 958 * Construct a PCB from a trapframe. This is called from kdb_trap() where 959 * we want to start a backtrace from the function that caused us to enter 960 * the debugger. We have the context in the trapframe, but base the trace 961 * on the PCB. The PCB doesn't have to be perfect, as long as it contains 962 * enough for a backtrace. 963 */ 964void 965makectx(struct trapframe *tf, struct pcb *pcb) 966{ 967 pcb->pcb_regs.sf_r4 = tf->tf_r4; 968 pcb->pcb_regs.sf_r5 = tf->tf_r5; 969 pcb->pcb_regs.sf_r6 = tf->tf_r6; 970 pcb->pcb_regs.sf_r7 = tf->tf_r7; 971 pcb->pcb_regs.sf_r8 = tf->tf_r8; 972 pcb->pcb_regs.sf_r9 = tf->tf_r9; 973 pcb->pcb_regs.sf_r10 = tf->tf_r10; 974 pcb->pcb_regs.sf_r11 = tf->tf_r11; 975 pcb->pcb_regs.sf_r12 = tf->tf_r12; 976 pcb->pcb_regs.sf_pc = tf->tf_pc; 977 pcb->pcb_regs.sf_lr = tf->tf_usr_lr; 978 pcb->pcb_regs.sf_sp = tf->tf_usr_sp; 979} 980 981/* 982 * Fake up a boot descriptor table 983 */ 984vm_offset_t 985fake_preload_metadata(struct arm_boot_params *abp __unused, void *dtb_ptr, 986 size_t dtb_size) 987{ 988#ifdef DDB 989 vm_offset_t zstart = 0, zend = 0; 990#endif 991 vm_offset_t lastaddr; 992 int i = 0; 993 static uint32_t fake_preload[35]; 994 995 fake_preload[i++] = MODINFO_NAME; 996 fake_preload[i++] = strlen("kernel") + 1; 997 strcpy((char*)&fake_preload[i++], "kernel"); 998 i += 1; 999 fake_preload[i++] = MODINFO_TYPE; 1000 fake_preload[i++] = strlen("elf kernel") + 1; 1001 strcpy((char*)&fake_preload[i++], "elf kernel"); 1002 i += 2; 1003 fake_preload[i++] = MODINFO_ADDR; 1004 fake_preload[i++] = sizeof(vm_offset_t); 1005 fake_preload[i++] = KERNVIRTADDR; 1006 fake_preload[i++] = MODINFO_SIZE; 1007 fake_preload[i++] = sizeof(uint32_t); 1008 fake_preload[i++] = (uint32_t)&end - KERNVIRTADDR; 1009#ifdef DDB 1010 if (*(uint32_t *)KERNVIRTADDR == MAGIC_TRAMP_NUMBER) { 1011 fake_preload[i++] = MODINFO_METADATA|MODINFOMD_SSYM; 1012 fake_preload[i++] = sizeof(vm_offset_t); 1013 fake_preload[i++] = *(uint32_t *)(KERNVIRTADDR + 4); 1014 fake_preload[i++] = MODINFO_METADATA|MODINFOMD_ESYM; 1015 fake_preload[i++] = sizeof(vm_offset_t); 1016 fake_preload[i++] = *(uint32_t *)(KERNVIRTADDR + 8); 1017 lastaddr = *(uint32_t *)(KERNVIRTADDR + 8); 1018 zend = lastaddr; 1019 zstart = *(uint32_t *)(KERNVIRTADDR + 4); 1020 db_fetch_ksymtab(zstart, zend); 1021 } else 1022#endif 1023 lastaddr = (vm_offset_t)&end; 1024 if (dtb_ptr != NULL) { 1025 /* Copy DTB to KVA space and insert it into module chain. */ 1026 lastaddr = roundup(lastaddr, sizeof(int)); 1027 fake_preload[i++] = MODINFO_METADATA | MODINFOMD_DTBP; 1028 fake_preload[i++] = sizeof(uint32_t); 1029 fake_preload[i++] = (uint32_t)lastaddr; 1030 memmove((void *)lastaddr, dtb_ptr, dtb_size); 1031 lastaddr += dtb_size; 1032 lastaddr = roundup(lastaddr, sizeof(int)); 1033 } 1034 fake_preload[i++] = 0; 1035 fake_preload[i] = 0; 1036 preload_metadata = (void *)fake_preload; 1037 1038 init_static_kenv(NULL, 0); 1039 1040 return (lastaddr); 1041} 1042 1043void 1044pcpu0_init(void) 1045{ 1046#if __ARM_ARCH >= 6 1047 set_curthread(&thread0); 1048#endif 1049 pcpu_init(pcpup, 0, sizeof(struct pcpu)); 1050 PCPU_SET(curthread, &thread0); 1051} 1052 1053#if defined(LINUX_BOOT_ABI) 1054 1055/* Convert the U-Boot command line into FreeBSD kenv and boot options. */ 1056static void 1057cmdline_set_env(char *cmdline, const char *guard) 1058{ 1059 char *cmdline_next, *env; 1060 size_t size, guard_len; 1061 int i; 1062 1063 size = strlen(cmdline); 1064 /* Skip leading spaces. */ 1065 for (; isspace(*cmdline) && (size > 0); cmdline++) 1066 size--; 1067 1068 /* Test and remove guard. */ 1069 if (guard != NULL && guard[0] != '\0') { 1070 guard_len = strlen(guard); 1071 if (strncasecmp(cmdline, guard, guard_len) != 0) 1072 return; 1073 cmdline += guard_len; 1074 size -= guard_len; 1075 } 1076 1077 /* Skip leading spaces. */ 1078 for (; isspace(*cmdline) && (size > 0); cmdline++) 1079 size--; 1080 1081 /* Replace ',' with '\0'. */ 1082 /* TODO: implement escaping for ',' character. */ 1083 cmdline_next = cmdline; 1084 while(strsep(&cmdline_next, ",") != NULL) 1085 ; 1086 init_static_kenv(cmdline, 0); 1087 /* Parse boothowto. */ 1088 for (i = 0; howto_names[i].ev != NULL; i++) { 1089 env = kern_getenv(howto_names[i].ev); 1090 if (env != NULL) { 1091 if (strtoul(env, NULL, 10) != 0) 1092 boothowto |= howto_names[i].mask; 1093 freeenv(env); 1094 } 1095 } 1096} 1097 1098vm_offset_t 1099linux_parse_boot_param(struct arm_boot_params *abp) 1100{ 1101 struct arm_lbabi_tag *walker; 1102 uint32_t revision; 1103 uint64_t serial; 1104 int size; 1105 vm_offset_t lastaddr; 1106#ifdef FDT 1107 struct fdt_header *dtb_ptr; 1108 uint32_t dtb_size; 1109#endif 1110 1111 /* 1112 * Linux boot ABI: r0 = 0, r1 is the board type (!= 0) and r2 1113 * is atags or dtb pointer. If all of these aren't satisfied, 1114 * then punt. Unfortunately, it looks like DT enabled kernels 1115 * doesn't uses board type and U-Boot delivers 0 in r1 for them. 1116 */ 1117 if (abp->abp_r0 != 0 || abp->abp_r2 == 0) 1118 return (0); 1119#ifdef FDT 1120 /* Test if r2 point to valid DTB. */ 1121 dtb_ptr = (struct fdt_header *)abp->abp_r2; 1122 if (fdt_check_header(dtb_ptr) == 0) { 1123 dtb_size = fdt_totalsize(dtb_ptr); 1124 return (fake_preload_metadata(abp, dtb_ptr, dtb_size)); 1125 } 1126#endif 1127 1128 board_id = abp->abp_r1; 1129 walker = (struct arm_lbabi_tag *)abp->abp_r2; 1130 1131 if (ATAG_TAG(walker) != ATAG_CORE) 1132 return 0; 1133 1134 atag_list = walker; 1135 while (ATAG_TAG(walker) != ATAG_NONE) { 1136 switch (ATAG_TAG(walker)) { 1137 case ATAG_CORE: 1138 break; 1139 case ATAG_MEM: 1140 arm_physmem_hardware_region(walker->u.tag_mem.start, 1141 walker->u.tag_mem.size); 1142 break; 1143 case ATAG_INITRD2: 1144 break; 1145 case ATAG_SERIAL: 1146 serial = walker->u.tag_sn.high; 1147 serial <<= 32; 1148 serial |= walker->u.tag_sn.low; 1149 board_set_serial(serial); 1150 break; 1151 case ATAG_REVISION: 1152 revision = walker->u.tag_rev.rev; 1153 board_set_revision(revision); 1154 break; 1155 case ATAG_CMDLINE: 1156 size = ATAG_SIZE(walker) - 1157 sizeof(struct arm_lbabi_header); 1158 size = min(size, LBABI_MAX_COMMAND_LINE); 1159 strncpy(linux_command_line, walker->u.tag_cmd.command, 1160 size); 1161 linux_command_line[size] = '\0'; 1162 break; 1163 default: 1164 break; 1165 } 1166 walker = ATAG_NEXT(walker); 1167 } 1168 1169 /* Save a copy for later */ 1170 bcopy(atag_list, atags, 1171 (char *)walker - (char *)atag_list + ATAG_SIZE(walker)); 1172 1173 lastaddr = fake_preload_metadata(abp, NULL, 0); 1174 cmdline_set_env(linux_command_line, CMDLINE_GUARD); 1175 return lastaddr; 1176} 1177#endif 1178 1179#if defined(FREEBSD_BOOT_LOADER) 1180vm_offset_t 1181freebsd_parse_boot_param(struct arm_boot_params *abp) 1182{ 1183 vm_offset_t lastaddr = 0; 1184 void *mdp; 1185 void *kmdp; 1186#ifdef DDB 1187 vm_offset_t ksym_start; 1188 vm_offset_t ksym_end; 1189#endif 1190 1191 /* 1192 * Mask metadata pointer: it is supposed to be on page boundary. If 1193 * the first argument (mdp) doesn't point to a valid address the 1194 * bootloader must have passed us something else than the metadata 1195 * ptr, so we give up. Also give up if we cannot find metadta section 1196 * the loader creates that we get all this data out of. 1197 */ 1198 1199 if ((mdp = (void *)(abp->abp_r0 & ~PAGE_MASK)) == NULL) 1200 return 0; 1201 preload_metadata = mdp; 1202 kmdp = preload_search_by_type("elf kernel"); 1203 if (kmdp == NULL) 1204 return 0; 1205 1206 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 1207 loader_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 1208 init_static_kenv(loader_envp, 0); 1209 lastaddr = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); 1210#ifdef DDB 1211 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); 1212 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); 1213 db_fetch_ksymtab(ksym_start, ksym_end); 1214#endif 1215 return lastaddr; 1216} 1217#endif 1218 1219vm_offset_t 1220default_parse_boot_param(struct arm_boot_params *abp) 1221{ 1222 vm_offset_t lastaddr; 1223 1224#if defined(LINUX_BOOT_ABI) 1225 if ((lastaddr = linux_parse_boot_param(abp)) != 0) 1226 return lastaddr; 1227#endif 1228#if defined(FREEBSD_BOOT_LOADER) 1229 if ((lastaddr = freebsd_parse_boot_param(abp)) != 0) 1230 return lastaddr; 1231#endif 1232 /* Fall back to hardcoded metadata. */ 1233 lastaddr = fake_preload_metadata(abp, NULL, 0); 1234 1235 return lastaddr; 1236} 1237 1238/* 1239 * Stub version of the boot parameter parsing routine. We are 1240 * called early in initarm, before even VM has been initialized. 1241 * This routine needs to preserve any data that the boot loader 1242 * has passed in before the kernel starts to grow past the end 1243 * of the BSS, traditionally the place boot-loaders put this data. 1244 * 1245 * Since this is called so early, things that depend on the vm system 1246 * being setup (including access to some SoC's serial ports), about 1247 * all that can be done in this routine is to copy the arguments. 1248 * 1249 * This is the default boot parameter parsing routine. Individual 1250 * kernels/boards can override this weak function with one of their 1251 * own. We just fake metadata... 1252 */ 1253__weak_reference(default_parse_boot_param, parse_boot_param); 1254 1255/* 1256 * Initialize proc0 1257 */ 1258void 1259init_proc0(vm_offset_t kstack) 1260{ 1261 proc_linkup0(&proc0, &thread0); 1262 thread0.td_kstack = kstack; 1263 thread0.td_pcb = (struct pcb *) 1264 (thread0.td_kstack + kstack_pages * PAGE_SIZE) - 1; 1265 thread0.td_pcb->pcb_flags = 0; 1266 thread0.td_pcb->pcb_vfpcpu = -1; 1267 thread0.td_pcb->pcb_vfpstate.fpscr = VFPSCR_DN; 1268 thread0.td_frame = &proc0_tf; 1269 pcpup->pc_curpcb = thread0.td_pcb; 1270} 1271 1272int 1273arm_predict_branch(void *cookie, u_int insn, register_t pc, register_t *new_pc, 1274 u_int (*fetch_reg)(void*, int), u_int (*read_int)(void*, vm_offset_t, u_int*)) 1275{ 1276 u_int addr, nregs, offset = 0; 1277 int error = 0; 1278 1279 switch ((insn >> 24) & 0xf) { 1280 case 0x2: /* add pc, reg1, #value */ 1281 case 0x0: /* add pc, reg1, reg2, lsl #offset */ 1282 addr = fetch_reg(cookie, (insn >> 16) & 0xf); 1283 if (((insn >> 16) & 0xf) == 15) 1284 addr += 8; 1285 if (insn & 0x0200000) { 1286 offset = (insn >> 7) & 0x1e; 1287 offset = (insn & 0xff) << (32 - offset) | 1288 (insn & 0xff) >> offset; 1289 } else { 1290 1291 offset = fetch_reg(cookie, insn & 0x0f); 1292 if ((insn & 0x0000ff0) != 0x00000000) { 1293 if (insn & 0x10) 1294 nregs = fetch_reg(cookie, 1295 (insn >> 8) & 0xf); 1296 else 1297 nregs = (insn >> 7) & 0x1f; 1298 switch ((insn >> 5) & 3) { 1299 case 0: 1300 /* lsl */ 1301 offset = offset << nregs; 1302 break; 1303 case 1: 1304 /* lsr */ 1305 offset = offset >> nregs; 1306 break; 1307 default: 1308 break; /* XXX */ 1309 } 1310 1311 } 1312 *new_pc = addr + offset; 1313 return (0); 1314 1315 } 1316 1317 case 0xa: /* b ... */ 1318 case 0xb: /* bl ... */ 1319 addr = ((insn << 2) & 0x03ffffff); 1320 if (addr & 0x02000000) 1321 addr |= 0xfc000000; 1322 *new_pc = (pc + 8 + addr); 1323 return (0); 1324 case 0x7: /* ldr pc, [pc, reg, lsl #2] */ 1325 addr = fetch_reg(cookie, insn & 0xf); 1326 addr = pc + 8 + (addr << 2); 1327 error = read_int(cookie, addr, &addr); 1328 *new_pc = addr; 1329 return (error); 1330 case 0x1: /* mov pc, reg */ 1331 *new_pc = fetch_reg(cookie, insn & 0xf); 1332 return (0); 1333 case 0x4: 1334 case 0x5: /* ldr pc, [reg] */ 1335 addr = fetch_reg(cookie, (insn >> 16) & 0xf); 1336 /* ldr pc, [reg, #offset] */ 1337 if (insn & (1 << 24)) 1338 offset = insn & 0xfff; 1339 if (insn & 0x00800000) 1340 addr += offset; 1341 else 1342 addr -= offset; 1343 error = read_int(cookie, addr, &addr); 1344 *new_pc = addr; 1345 1346 return (error); 1347 case 0x8: /* ldmxx reg, {..., pc} */ 1348 case 0x9: 1349 addr = fetch_reg(cookie, (insn >> 16) & 0xf); 1350 nregs = (insn & 0x5555) + ((insn >> 1) & 0x5555); 1351 nregs = (nregs & 0x3333) + ((nregs >> 2) & 0x3333); 1352 nregs = (nregs + (nregs >> 4)) & 0x0f0f; 1353 nregs = (nregs + (nregs >> 8)) & 0x001f; 1354 switch ((insn >> 23) & 0x3) { 1355 case 0x0: /* ldmda */ 1356 addr = addr - 0; 1357 break; 1358 case 0x1: /* ldmia */ 1359 addr = addr + 0 + ((nregs - 1) << 2); 1360 break; 1361 case 0x2: /* ldmdb */ 1362 addr = addr - 4; 1363 break; 1364 case 0x3: /* ldmib */ 1365 addr = addr + 4 + ((nregs - 1) << 2); 1366 break; 1367 } 1368 error = read_int(cookie, addr, &addr); 1369 *new_pc = addr; 1370 1371 return (error); 1372 default: 1373 return (EINVAL); 1374 } 1375} 1376 1377#if __ARM_ARCH >= 6 1378void 1379set_stackptrs(int cpu) 1380{ 1381 1382 set_stackptr(PSR_IRQ32_MODE, 1383 irqstack + ((IRQ_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1384 set_stackptr(PSR_ABT32_MODE, 1385 abtstack + ((ABT_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1386 set_stackptr(PSR_UND32_MODE, 1387 undstack + ((UND_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1388} 1389#else 1390void 1391set_stackptrs(int cpu) 1392{ 1393 1394 set_stackptr(PSR_IRQ32_MODE, 1395 irqstack.pv_va + ((IRQ_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1396 set_stackptr(PSR_ABT32_MODE, 1397 abtstack.pv_va + ((ABT_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1398 set_stackptr(PSR_UND32_MODE, 1399 undstack.pv_va + ((UND_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1400} 1401#endif 1402 1403#ifdef EFI 1404static void 1405add_efi_map_entries(struct efi_map_header *efihdr, struct mem_region *mr, 1406 int *mrcnt) 1407{ 1408 struct efi_md *map, *p; 1409 const char *type; 1410 size_t efisz, memory_size; 1411 int ndesc, i, j; 1412 1413 static const char *types[] = { 1414 "Reserved", 1415 "LoaderCode", 1416 "LoaderData", 1417 "BootServicesCode", 1418 "BootServicesData", 1419 "RuntimeServicesCode", 1420 "RuntimeServicesData", 1421 "ConventionalMemory", 1422 "UnusableMemory", 1423 "ACPIReclaimMemory", 1424 "ACPIMemoryNVS", 1425 "MemoryMappedIO", 1426 "MemoryMappedIOPortSpace", 1427 "PalCode" 1428 }; 1429 1430 *mrcnt = 0; 1431 1432 /* 1433 * Memory map data provided by UEFI via the GetMemoryMap 1434 * Boot Services API. 1435 */ 1436 efisz = roundup2(sizeof(struct efi_map_header), 0x10); 1437 map = (struct efi_md *)((uint8_t *)efihdr + efisz); 1438 1439 if (efihdr->descriptor_size == 0) 1440 return; 1441 ndesc = efihdr->memory_size / efihdr->descriptor_size; 1442 1443 if (boothowto & RB_VERBOSE) 1444 printf("%23s %12s %12s %8s %4s\n", 1445 "Type", "Physical", "Virtual", "#Pages", "Attr"); 1446 1447 memory_size = 0; 1448 for (i = 0, j = 0, p = map; i < ndesc; i++, 1449 p = efi_next_descriptor(p, efihdr->descriptor_size)) { 1450 if (boothowto & RB_VERBOSE) { 1451 if (p->md_type <= EFI_MD_TYPE_PALCODE) 1452 type = types[p->md_type]; 1453 else 1454 type = "<INVALID>"; 1455 printf("%23s %012llx %12p %08llx ", type, p->md_phys, 1456 p->md_virt, p->md_pages); 1457 if (p->md_attr & EFI_MD_ATTR_UC) 1458 printf("UC "); 1459 if (p->md_attr & EFI_MD_ATTR_WC) 1460 printf("WC "); 1461 if (p->md_attr & EFI_MD_ATTR_WT) 1462 printf("WT "); 1463 if (p->md_attr & EFI_MD_ATTR_WB) 1464 printf("WB "); 1465 if (p->md_attr & EFI_MD_ATTR_UCE) 1466 printf("UCE "); 1467 if (p->md_attr & EFI_MD_ATTR_WP) 1468 printf("WP "); 1469 if (p->md_attr & EFI_MD_ATTR_RP) 1470 printf("RP "); 1471 if (p->md_attr & EFI_MD_ATTR_XP) 1472 printf("XP "); 1473 if (p->md_attr & EFI_MD_ATTR_RT) 1474 printf("RUNTIME"); 1475 printf("\n"); 1476 } 1477 1478 switch (p->md_type) { 1479 case EFI_MD_TYPE_CODE: 1480 case EFI_MD_TYPE_DATA: 1481 case EFI_MD_TYPE_BS_CODE: 1482 case EFI_MD_TYPE_BS_DATA: 1483 case EFI_MD_TYPE_FREE: 1484 /* 1485 * We're allowed to use any entry with these types. 1486 */ 1487 break; 1488 default: 1489 continue; 1490 } 1491 1492 j++; 1493 if (j >= FDT_MEM_REGIONS) 1494 break; 1495 1496 mr[j].mr_start = p->md_phys; 1497 mr[j].mr_size = p->md_pages * PAGE_SIZE; 1498 memory_size += mr[j].mr_size; 1499 } 1500 1501 *mrcnt = j; 1502} 1503#endif /* EFI */ 1504 1505#ifdef FDT 1506static char * 1507kenv_next(char *cp) 1508{ 1509 1510 if (cp != NULL) { 1511 while (*cp != 0) 1512 cp++; 1513 cp++; 1514 if (*cp == 0) 1515 cp = NULL; 1516 } 1517 return (cp); 1518} 1519 1520static void 1521print_kenv(void) 1522{ 1523 char *cp; 1524 1525 debugf("loader passed (static) kenv:\n"); 1526 if (loader_envp == NULL) { 1527 debugf(" no env, null ptr\n"); 1528 return; 1529 } 1530 debugf(" loader_envp = 0x%08x\n", (uint32_t)loader_envp); 1531 1532 for (cp = loader_envp; cp != NULL; cp = kenv_next(cp)) 1533 debugf(" %x %s\n", (uint32_t)cp, cp); 1534} 1535 1536#if __ARM_ARCH < 6 1537void * 1538initarm(struct arm_boot_params *abp) 1539{ 1540 struct mem_region mem_regions[FDT_MEM_REGIONS]; 1541 struct pv_addr kernel_l1pt; 1542 struct pv_addr dpcpu; 1543 vm_offset_t dtbp, freemempos, l2_start, lastaddr; 1544 uint64_t memsize; 1545 uint32_t l2size; 1546 char *env; 1547 void *kmdp; 1548 u_int l1pagetable; 1549 int i, j, err_devmap, mem_regions_sz; 1550 1551 lastaddr = parse_boot_param(abp); 1552 arm_physmem_kernaddr = abp->abp_physaddr; 1553 1554 memsize = 0; 1555 1556 cpuinfo_init(); 1557 set_cpufuncs(); 1558 1559 /* 1560 * Find the dtb passed in by the boot loader. 1561 */ 1562 kmdp = preload_search_by_type("elf kernel"); 1563 if (kmdp != NULL) 1564 dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t); 1565 else 1566 dtbp = (vm_offset_t)NULL; 1567 1568#if defined(FDT_DTB_STATIC) 1569 /* 1570 * In case the device tree blob was not retrieved (from metadata) try 1571 * to use the statically embedded one. 1572 */ 1573 if (dtbp == (vm_offset_t)NULL) 1574 dtbp = (vm_offset_t)&fdt_static_dtb; 1575#endif 1576 1577 if (OF_install(OFW_FDT, 0) == FALSE) 1578 panic("Cannot install FDT"); 1579 1580 if (OF_init((void *)dtbp) != 0) 1581 panic("OF_init failed with the found device tree"); 1582 1583 /* Grab physical memory regions information from device tree. */ 1584 if (fdt_get_mem_regions(mem_regions, &mem_regions_sz, &memsize) != 0) 1585 panic("Cannot get physical memory regions"); 1586 arm_physmem_hardware_regions(mem_regions, mem_regions_sz); 1587 1588 /* Grab reserved memory regions information from device tree. */ 1589 if (fdt_get_reserved_regions(mem_regions, &mem_regions_sz) == 0) 1590 arm_physmem_exclude_regions(mem_regions, mem_regions_sz, 1591 EXFLAG_NODUMP | EXFLAG_NOALLOC); 1592 1593 /* Platform-specific initialisation */ 1594 platform_probe_and_attach(); 1595 1596 pcpu0_init(); 1597 1598 /* Do basic tuning, hz etc */ 1599 init_param1(); 1600 1601 /* Calculate number of L2 tables needed for mapping vm_page_array */ 1602 l2size = (memsize / PAGE_SIZE) * sizeof(struct vm_page); 1603 l2size = (l2size >> L1_S_SHIFT) + 1; 1604 1605 /* 1606 * Add one table for end of kernel map, one for stacks, msgbuf and 1607 * L1 and L2 tables map and one for vectors map. 1608 */ 1609 l2size += 3; 1610 1611 /* Make it divisible by 4 */ 1612 l2size = (l2size + 3) & ~3; 1613 1614 freemempos = (lastaddr + PAGE_MASK) & ~PAGE_MASK; 1615 1616 /* Define a macro to simplify memory allocation */ 1617#define valloc_pages(var, np) \ 1618 alloc_pages((var).pv_va, (np)); \ 1619 (var).pv_pa = (var).pv_va + (abp->abp_physaddr - KERNVIRTADDR); 1620 1621#define alloc_pages(var, np) \ 1622 (var) = freemempos; \ 1623 freemempos += (np * PAGE_SIZE); \ 1624 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 1625 1626 while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0) 1627 freemempos += PAGE_SIZE; 1628 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 1629 1630 for (i = 0, j = 0; i < l2size; ++i) { 1631 if (!(i % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) { 1632 valloc_pages(kernel_pt_table[i], 1633 L2_TABLE_SIZE / PAGE_SIZE); 1634 j = i; 1635 } else { 1636 kernel_pt_table[i].pv_va = kernel_pt_table[j].pv_va + 1637 L2_TABLE_SIZE_REAL * (i - j); 1638 kernel_pt_table[i].pv_pa = 1639 kernel_pt_table[i].pv_va - KERNVIRTADDR + 1640 abp->abp_physaddr; 1641 1642 } 1643 } 1644 /* 1645 * Allocate a page for the system page mapped to 0x00000000 1646 * or 0xffff0000. This page will just contain the system vectors 1647 * and can be shared by all processes. 1648 */ 1649 valloc_pages(systempage, 1); 1650 1651 /* Allocate dynamic per-cpu area. */ 1652 valloc_pages(dpcpu, DPCPU_SIZE / PAGE_SIZE); 1653 dpcpu_init((void *)dpcpu.pv_va, 0); 1654 1655 /* Allocate stacks for all modes */ 1656 valloc_pages(irqstack, IRQ_STACK_SIZE * MAXCPU); 1657 valloc_pages(abtstack, ABT_STACK_SIZE * MAXCPU); 1658 valloc_pages(undstack, UND_STACK_SIZE * MAXCPU); 1659 valloc_pages(kernelstack, kstack_pages * MAXCPU); 1660 valloc_pages(msgbufpv, round_page(msgbufsize) / PAGE_SIZE); 1661 1662 /* 1663 * Now we start construction of the L1 page table 1664 * We start by mapping the L2 page tables into the L1. 1665 * This means that we can replace L1 mappings later on if necessary 1666 */ 1667 l1pagetable = kernel_l1pt.pv_va; 1668 1669 /* 1670 * Try to map as much as possible of kernel text and data using 1671 * 1MB section mapping and for the rest of initial kernel address 1672 * space use L2 coarse tables. 1673 * 1674 * Link L2 tables for mapping remainder of kernel (modulo 1MB) 1675 * and kernel structures 1676 */ 1677 l2_start = lastaddr & ~(L1_S_OFFSET); 1678 for (i = 0 ; i < l2size - 1; i++) 1679 pmap_link_l2pt(l1pagetable, l2_start + i * L1_S_SIZE, 1680 &kernel_pt_table[i]); 1681 1682 pmap_curmaxkvaddr = l2_start + (l2size - 1) * L1_S_SIZE; 1683 1684 /* Map kernel code and data */ 1685 pmap_map_chunk(l1pagetable, KERNVIRTADDR, abp->abp_physaddr, 1686 (((uint32_t)(lastaddr) - KERNVIRTADDR) + PAGE_MASK) & ~PAGE_MASK, 1687 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 1688 1689 /* Map L1 directory and allocated L2 page tables */ 1690 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 1691 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 1692 1693 pmap_map_chunk(l1pagetable, kernel_pt_table[0].pv_va, 1694 kernel_pt_table[0].pv_pa, 1695 L2_TABLE_SIZE_REAL * l2size, 1696 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 1697 1698 /* Map allocated DPCPU, stacks and msgbuf */ 1699 pmap_map_chunk(l1pagetable, dpcpu.pv_va, dpcpu.pv_pa, 1700 freemempos - dpcpu.pv_va, 1701 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 1702 1703 /* Link and map the vector page */ 1704 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH, 1705 &kernel_pt_table[l2size - 1]); 1706 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 1707 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE, PTE_CACHE); 1708 1709 /* Establish static device mappings. */ 1710 err_devmap = platform_devmap_init(); 1711 devmap_bootstrap(l1pagetable, NULL); 1712 vm_max_kernel_address = platform_lastaddr(); 1713 1714 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL * 2)) | DOMAIN_CLIENT); 1715 pmap_pa = kernel_l1pt.pv_pa; 1716 cpu_setttb(kernel_l1pt.pv_pa); 1717 cpu_tlb_flushID(); 1718 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL * 2)); 1719 1720 /* 1721 * Now that proper page tables are installed, call cpu_setup() to enable 1722 * instruction and data caches and other chip-specific features. 1723 */ 1724 cpu_setup(); 1725 1726 /* 1727 * Only after the SOC registers block is mapped we can perform device 1728 * tree fixups, as they may attempt to read parameters from hardware. 1729 */ 1730 OF_interpret("perform-fixup", 0); 1731 1732 platform_gpio_init(); 1733 1734 cninit(); 1735 1736 debugf("initarm: console initialized\n"); 1737 debugf(" arg1 kmdp = 0x%08x\n", (uint32_t)kmdp); 1738 debugf(" boothowto = 0x%08x\n", boothowto); 1739 debugf(" dtbp = 0x%08x\n", (uint32_t)dtbp); 1740 print_kenv(); 1741 1742 env = kern_getenv("kernelname"); 1743 if (env != NULL) { 1744 strlcpy(kernelname, env, sizeof(kernelname)); 1745 freeenv(env); 1746 } 1747 1748 if (err_devmap != 0) 1749 printf("WARNING: could not fully configure devmap, error=%d\n", 1750 err_devmap); 1751 1752 platform_late_init(); 1753 1754 /* 1755 * Pages were allocated during the secondary bootstrap for the 1756 * stacks for different CPU modes. 1757 * We must now set the r13 registers in the different CPU modes to 1758 * point to these stacks. 1759 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 1760 * of the stack memory. 1761 */ 1762 cpu_control(CPU_CONTROL_MMU_ENABLE, CPU_CONTROL_MMU_ENABLE); 1763 1764 set_stackptrs(0); 1765 1766 /* 1767 * We must now clean the cache again.... 1768 * Cleaning may be done by reading new data to displace any 1769 * dirty data in the cache. This will have happened in cpu_setttb() 1770 * but since we are boot strapping the addresses used for the read 1771 * may have just been remapped and thus the cache could be out 1772 * of sync. A re-clean after the switch will cure this. 1773 * After booting there are no gross relocations of the kernel thus 1774 * this problem will not occur after initarm(). 1775 */ 1776 cpu_idcache_wbinv_all(); 1777 1778 undefined_init(); 1779 1780 init_proc0(kernelstack.pv_va); 1781 1782 arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 1783 pmap_bootstrap(freemempos, &kernel_l1pt); 1784 msgbufp = (void *)msgbufpv.pv_va; 1785 msgbufinit(msgbufp, msgbufsize); 1786 mutex_init(); 1787 1788 /* 1789 * Exclude the kernel (and all the things we allocated which immediately 1790 * follow the kernel) from the VM allocation pool but not from crash 1791 * dumps. virtual_avail is a global variable which tracks the kva we've 1792 * "allocated" while setting up pmaps. 1793 * 1794 * Prepare the list of physical memory available to the vm subsystem. 1795 */ 1796 arm_physmem_exclude_region(abp->abp_physaddr, 1797 (virtual_avail - KERNVIRTADDR), EXFLAG_NOALLOC); 1798 arm_physmem_init_kernel_globals(); 1799 1800 init_param2(physmem); 1801 dbg_monitor_init(); 1802 kdb_init(); 1803 1804 return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP - 1805 sizeof(struct pcb))); 1806} 1807#else /* __ARM_ARCH < 6 */ 1808void * 1809initarm(struct arm_boot_params *abp) 1810{ 1811 struct mem_region mem_regions[FDT_MEM_REGIONS]; 1812 vm_paddr_t lastaddr; 1813 vm_offset_t dtbp, kernelstack, dpcpu; 1814 char *env; 1815 void *kmdp; 1816 int err_devmap, mem_regions_sz; 1817#ifdef EFI 1818 struct efi_map_header *efihdr; 1819#endif 1820 1821 /* get last allocated physical address */ 1822 arm_physmem_kernaddr = abp->abp_physaddr; 1823 lastaddr = parse_boot_param(abp) - KERNVIRTADDR + arm_physmem_kernaddr; 1824 1825 set_cpufuncs(); 1826 cpuinfo_init(); 1827 1828 /* 1829 * Find the dtb passed in by the boot loader. 1830 */ 1831 kmdp = preload_search_by_type("elf kernel"); 1832 dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t); 1833#if defined(FDT_DTB_STATIC) 1834 /* 1835 * In case the device tree blob was not retrieved (from metadata) try 1836 * to use the statically embedded one. 1837 */ 1838 if (dtbp == (vm_offset_t)NULL) 1839 dtbp = (vm_offset_t)&fdt_static_dtb; 1840#endif 1841 1842 if (OF_install(OFW_FDT, 0) == FALSE) 1843 panic("Cannot install FDT"); 1844 1845 if (OF_init((void *)dtbp) != 0) 1846 panic("OF_init failed with the found device tree"); 1847 1848#if defined(LINUX_BOOT_ABI) 1849 if (loader_envp == NULL && fdt_get_chosen_bootargs(linux_command_line, 1850 LBABI_MAX_COMMAND_LINE) == 0) 1851 cmdline_set_env(linux_command_line, CMDLINE_GUARD); 1852#endif 1853 1854#ifdef EFI 1855 efihdr = (struct efi_map_header *)preload_search_info(kmdp, 1856 MODINFO_METADATA | MODINFOMD_EFI_MAP); 1857 if (efihdr != NULL) { 1858 add_efi_map_entries(efihdr, mem_regions, &mem_regions_sz); 1859 } else 1860#endif 1861 { 1862 /* Grab physical memory regions information from device tree. */ 1863 if (fdt_get_mem_regions(mem_regions, &mem_regions_sz,NULL) != 0) 1864 panic("Cannot get physical memory regions"); 1865 } 1866 arm_physmem_hardware_regions(mem_regions, mem_regions_sz); 1867 1868 /* Grab reserved memory regions information from device tree. */ 1869 if (fdt_get_reserved_regions(mem_regions, &mem_regions_sz) == 0) 1870 arm_physmem_exclude_regions(mem_regions, mem_regions_sz, 1871 EXFLAG_NODUMP | EXFLAG_NOALLOC); 1872 1873 /* 1874 * Set TEX remapping registers. 1875 * Setup kernel page tables and switch to kernel L1 page table. 1876 */ 1877 pmap_set_tex(); 1878 pmap_bootstrap_prepare(lastaddr); 1879 1880 /* 1881 * Now that proper page tables are installed, call cpu_setup() to enable 1882 * instruction and data caches and other chip-specific features. 1883 */ 1884 cpu_setup(); 1885 1886 /* Platform-specific initialisation */ 1887 platform_probe_and_attach(); 1888 pcpu0_init(); 1889 1890 /* Do basic tuning, hz etc */ 1891 init_param1(); 1892 1893 /* 1894 * Allocate a page for the system page mapped to 0xffff0000 1895 * This page will just contain the system vectors and can be 1896 * shared by all processes. 1897 */ 1898 systempage = pmap_preboot_get_pages(1); 1899 1900 /* Map the vector page. */ 1901 pmap_preboot_map_pages(systempage, ARM_VECTORS_HIGH, 1); 1902 if (virtual_end >= ARM_VECTORS_HIGH) 1903 virtual_end = ARM_VECTORS_HIGH - 1; 1904 1905 /* Allocate dynamic per-cpu area. */ 1906 dpcpu = pmap_preboot_get_vpages(DPCPU_SIZE / PAGE_SIZE); 1907 dpcpu_init((void *)dpcpu, 0); 1908 1909 /* Allocate stacks for all modes */ 1910 irqstack = pmap_preboot_get_vpages(IRQ_STACK_SIZE * MAXCPU); 1911 abtstack = pmap_preboot_get_vpages(ABT_STACK_SIZE * MAXCPU); 1912 undstack = pmap_preboot_get_vpages(UND_STACK_SIZE * MAXCPU ); 1913 kernelstack = pmap_preboot_get_vpages(kstack_pages * MAXCPU); 1914 1915 /* Allocate message buffer. */ 1916 msgbufp = (void *)pmap_preboot_get_vpages( 1917 round_page(msgbufsize) / PAGE_SIZE); 1918 1919 /* 1920 * Pages were allocated during the secondary bootstrap for the 1921 * stacks for different CPU modes. 1922 * We must now set the r13 registers in the different CPU modes to 1923 * point to these stacks. 1924 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 1925 * of the stack memory. 1926 */ 1927 set_stackptrs(0); 1928 mutex_init(); 1929 1930 /* Establish static device mappings. */ 1931 err_devmap = platform_devmap_init(); 1932 devmap_bootstrap(0, NULL); 1933 vm_max_kernel_address = platform_lastaddr(); 1934 1935 /* 1936 * Only after the SOC registers block is mapped we can perform device 1937 * tree fixups, as they may attempt to read parameters from hardware. 1938 */ 1939 OF_interpret("perform-fixup", 0); 1940 platform_gpio_init(); 1941 cninit(); 1942 1943 debugf("initarm: console initialized\n"); 1944 debugf(" arg1 kmdp = 0x%08x\n", (uint32_t)kmdp); 1945 debugf(" boothowto = 0x%08x\n", boothowto); 1946 debugf(" dtbp = 0x%08x\n", (uint32_t)dtbp); 1947 debugf(" lastaddr1: 0x%08x\n", lastaddr); 1948 print_kenv(); 1949 1950 env = kern_getenv("kernelname"); 1951 if (env != NULL) 1952 strlcpy(kernelname, env, sizeof(kernelname)); 1953 1954 if (err_devmap != 0) 1955 printf("WARNING: could not fully configure devmap, error=%d\n", 1956 err_devmap); 1957 1958 platform_late_init(); 1959 1960 /* 1961 * We must now clean the cache again.... 1962 * Cleaning may be done by reading new data to displace any 1963 * dirty data in the cache. This will have happened in cpu_setttb() 1964 * but since we are boot strapping the addresses used for the read 1965 * may have just been remapped and thus the cache could be out 1966 * of sync. A re-clean after the switch will cure this. 1967 * After booting there are no gross relocations of the kernel thus 1968 * this problem will not occur after initarm(). 1969 */ 1970 /* Set stack for exception handlers */ 1971 undefined_init(); 1972 init_proc0(kernelstack); 1973 arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 1974 enable_interrupts(PSR_A); 1975 pmap_bootstrap(0); 1976 1977 /* Exclude the kernel (and all the things we allocated which immediately 1978 * follow the kernel) from the VM allocation pool but not from crash 1979 * dumps. virtual_avail is a global variable which tracks the kva we've 1980 * "allocated" while setting up pmaps. 1981 * 1982 * Prepare the list of physical memory available to the vm subsystem. 1983 */ 1984 arm_physmem_exclude_region(abp->abp_physaddr, 1985 pmap_preboot_get_pages(0) - abp->abp_physaddr, EXFLAG_NOALLOC); 1986 arm_physmem_init_kernel_globals(); 1987 1988 init_param2(physmem); 1989 /* Init message buffer. */ 1990 msgbufinit(msgbufp, msgbufsize); 1991 dbg_monitor_init(); 1992 kdb_init(); 1993 return ((void *)STACKALIGN(thread0.td_pcb)); 1994 1995} 1996 1997#endif /* __ARM_ARCH < 6 */ 1998#endif /* FDT */ 1999