machdep.c revision 242531
1226031Sstas/* $NetBSD: arm32_machdep.c,v 1.44 2004/03/24 15:34:47 atatat Exp $ */ 2226031Sstas 3226031Sstas/*- 4226031Sstas * Copyright (c) 2004 Olivier Houchard 5226031Sstas * Copyright (c) 1994-1998 Mark Brinicombe. 6226031Sstas * Copyright (c) 1994 Brini. 7226031Sstas * All rights reserved. 8226031Sstas * 9226031Sstas * This code is derived from software written for Brini by Mark Brinicombe 10226031Sstas * 11226031Sstas * Redistribution and use in source and binary forms, with or without 12226031Sstas * modification, are permitted provided that the following conditions 13226031Sstas * are met: 14226031Sstas * 1. Redistributions of source code must retain the above copyright 15226031Sstas * notice, this list of conditions and the following disclaimer. 16226031Sstas * 2. Redistributions in binary form must reproduce the above copyright 17226031Sstas * notice, this list of conditions and the following disclaimer in the 18226031Sstas * documentation and/or other materials provided with the distribution. 19226031Sstas * 3. All advertising materials mentioning features or use of this software 20226031Sstas * must display the following acknowledgement: 21226031Sstas * This product includes software developed by Mark Brinicombe 22226031Sstas * for the NetBSD Project. 23226031Sstas * 4. The name of the company nor the name of the author may be used to 24226031Sstas * endorse or promote products derived from this software without specific 25226031Sstas * prior written permission. 26226031Sstas * 27226031Sstas * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 28226031Sstas * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 29226031Sstas * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 30226031Sstas * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 31226031Sstas * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 32226031Sstas * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 33226031Sstas * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34226031Sstas * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35226031Sstas * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36226031Sstas * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37226031Sstas * SUCH DAMAGE. 38226031Sstas * 39226031Sstas * Machine dependant functions for kernel setup 40226031Sstas * 41226031Sstas * Created : 17/09/94 42226031Sstas * Updated : 18/04/01 updated for new wscons 43226031Sstas */ 44226031Sstas 45226031Sstas#include "opt_compat.h" 46226031Sstas#include "opt_ddb.h" 47226031Sstas#include "opt_platform.h" 48226031Sstas#include "opt_timer.h" 49226031Sstas 50226031Sstas#include <sys/cdefs.h> 51226031Sstas__FBSDID("$FreeBSD: head/sys/arm/arm/machdep.c 242531 2012-11-03 22:39:07Z andrew $"); 52226031Sstas 53226031Sstas#include <sys/param.h> 54226031Sstas#include <sys/proc.h> 55226031Sstas#include <sys/systm.h> 56226031Sstas#include <sys/bio.h> 57226031Sstas#include <sys/buf.h> 58226031Sstas#include <sys/bus.h> 59226031Sstas#include <sys/cons.h> 60226031Sstas#include <sys/cpu.h> 61226031Sstas#include <sys/exec.h> 62226031Sstas#include <sys/imgact.h> 63226031Sstas#include <sys/kdb.h> 64226031Sstas#include <sys/kernel.h> 65226031Sstas#include <sys/ktr.h> 66226031Sstas#include <sys/linker.h> 67226031Sstas#include <sys/lock.h> 68226031Sstas#include <sys/malloc.h> 69226031Sstas#include <sys/msgbuf.h> 70226031Sstas#include <sys/mutex.h> 71226031Sstas#include <sys/pcpu.h> 72226031Sstas#include <sys/ptrace.h> 73226031Sstas#include <sys/signalvar.h> 74226031Sstas#include <sys/syscallsubr.h> 75226031Sstas#include <sys/sysent.h> 76226031Sstas#include <sys/sysproto.h> 77226031Sstas#include <sys/uio.h> 78226031Sstas 79226031Sstas#include <vm/vm.h> 80226031Sstas#include <vm/pmap.h> 81226031Sstas#include <vm/vm_map.h> 82226031Sstas#include <vm/vm_object.h> 83226031Sstas#include <vm/vm_page.h> 84226031Sstas#include <vm/vm_pager.h> 85226031Sstas 86226031Sstas#include <machine/armreg.h> 87226031Sstas#include <machine/atags.h> 88226031Sstas#include <machine/cpu.h> 89226031Sstas#include <machine/machdep.h> 90226031Sstas#include <machine/md_var.h> 91226031Sstas#include <machine/metadata.h> 92226031Sstas#include <machine/pcb.h> 93226031Sstas#include <machine/pmap.h> 94226031Sstas#include <machine/reg.h> 95226031Sstas#include <machine/trap.h> 96226031Sstas#include <machine/undefined.h> 97226031Sstas#include <machine/vmparam.h> 98226031Sstas#include <machine/sysarch.h> 99226031Sstas 100226031Sstas#ifdef FDT 101226031Sstas#include <dev/fdt/fdt_common.h> 102226031Sstas#include <dev/ofw/openfirm.h> 103226031Sstas#endif 104226031Sstas 105226031Sstas#ifdef DEBUG 106226031Sstas#define debugf(fmt, args...) printf(fmt, ##args) 107226031Sstas#else 108226031Sstas#define debugf(fmt, args...) 109226031Sstas#endif 110226031Sstas 111226031Sstasstruct pcpu __pcpu[MAXCPU]; 112226031Sstasstruct pcpu *pcpup = &__pcpu[0]; 113226031Sstas 114226031Sstasstatic struct trapframe proc0_tf; 115226031Sstasuint32_t cpu_reset_address = 0; 116226031Sstasint cold = 1; 117226031Sstasvm_offset_t vector_page; 118226031Sstas 119226031Sstaslong realmem = 0; 120226031Sstas 121226031Sstasint (*_arm_memcpy)(void *, void *, int, int) = NULL; 122226031Sstasint (*_arm_bzero)(void *, int, int) = NULL; 123226031Sstasint _min_memcpy_size = 0; 124226031Sstasint _min_bzero_size = 0; 125226031Sstas 126226031Sstasextern int *end; 127226031Sstas#ifdef DDB 128226031Sstasextern vm_offset_t ksym_start, ksym_end; 129226031Sstas#endif 130226031Sstas 131226031Sstas#ifdef FDT 132226031Sstas/* 133226031Sstas * This is the number of L2 page tables required for covering max 134226031Sstas * (hypothetical) memsize of 4GB and all kernel mappings (vectors, msgbuf, 135226031Sstas * stacks etc.), uprounded to be divisible by 4. 136226031Sstas */ 137226031Sstas#define KERNEL_PT_MAX 78 138226031Sstas 139226031Sstasstatic struct pv_addr kernel_pt_table[KERNEL_PT_MAX]; 140226031Sstas 141226031Sstasvm_paddr_t phys_avail[10]; 142226031Sstasvm_paddr_t dump_avail[4]; 143226031Sstas 144226031Sstasextern u_int data_abort_handler_address; 145226031Sstasextern u_int prefetch_abort_handler_address; 146226031Sstasextern u_int undefined_handler_address; 147226031Sstas 148226031Sstasvm_paddr_t pmap_pa; 149226031Sstas 150226031Sstasstruct pv_addr systempage; 151226031Sstasstatic struct pv_addr msgbufpv; 152226031Sstasstruct pv_addr irqstack; 153226031Sstasstruct pv_addr undstack; 154226031Sstasstruct pv_addr abtstack; 155226031Sstasstatic struct pv_addr kernelstack; 156226031Sstas 157226031Sstasconst struct pmap_devmap *pmap_devmap_bootstrap_table; 158226031Sstas#endif 159226031Sstas 160226031Sstas#if defined(LINUX_BOOT_ABI) 161226031Sstas#define LBABI_MAX_BANKS 10 162226031Sstas 163226031Sstasuint32_t board_id; 164226031Sstasstruct arm_lbabi_tag *atag_list; 165226031Sstasuint32_t revision; 166226031Sstasuint64_t serial; 167226031Sstaschar linux_command_line[LBABI_MAX_COMMAND_LINE + 1]; 168226031Sstaschar atags[LBABI_MAX_COMMAND_LINE * 2]; 169226031Sstasuint32_t memstart[LBABI_MAX_BANKS]; 170226031Sstasuint32_t memsize[LBABI_MAX_BANKS]; 171226031Sstasuint32_t membanks; 172226031Sstas#endif 173226031Sstas 174226031Sstasvoid 175226031Sstassendsig(catcher, ksi, mask) 176226031Sstas sig_t catcher; 177226031Sstas ksiginfo_t *ksi; 178226031Sstas sigset_t *mask; 179226031Sstas{ 180226031Sstas struct thread *td; 181226031Sstas struct proc *p; 182226031Sstas struct trapframe *tf; 183226031Sstas struct sigframe *fp, frame; 184226031Sstas struct sigacts *psp; 185226031Sstas int onstack; 186226031Sstas int sig; 187226031Sstas int code; 188226031Sstas 189226031Sstas td = curthread; 190226031Sstas p = td->td_proc; 191226031Sstas PROC_LOCK_ASSERT(p, MA_OWNED); 192226031Sstas sig = ksi->ksi_signo; 193226031Sstas code = ksi->ksi_code; 194226031Sstas psp = p->p_sigacts; 195226031Sstas mtx_assert(&psp->ps_mtx, MA_OWNED); 196226031Sstas tf = td->td_frame; 197226031Sstas onstack = sigonstack(tf->tf_usr_sp); 198226031Sstas 199226031Sstas CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm, 200226031Sstas catcher, sig); 201226031Sstas 202226031Sstas /* Allocate and validate space for the signal handler context. */ 203226031Sstas if ((td->td_pflags & TDP_ALTSTACK) != 0 && !(onstack) && 204226031Sstas SIGISMEMBER(psp->ps_sigonstack, sig)) { 205226031Sstas fp = (struct sigframe *)(td->td_sigstk.ss_sp + 206226031Sstas td->td_sigstk.ss_size); 207226031Sstas#if defined(COMPAT_43) 208226031Sstas td->td_sigstk.ss_flags |= SS_ONSTACK; 209226031Sstas#endif 210226031Sstas } else 211226031Sstas fp = (struct sigframe *)td->td_frame->tf_usr_sp; 212226031Sstas 213226031Sstas /* make room on the stack */ 214226031Sstas fp--; 215226031Sstas 216226031Sstas /* make the stack aligned */ 217226031Sstas fp = (struct sigframe *)STACKALIGN(fp); 218226031Sstas /* Populate the siginfo frame. */ 219226031Sstas get_mcontext(td, &frame.sf_uc.uc_mcontext, 0); 220226031Sstas frame.sf_si = ksi->ksi_info; 221226031Sstas frame.sf_uc.uc_sigmask = *mask; 222226031Sstas frame.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK ) 223226031Sstas ? ((onstack) ? SS_ONSTACK : 0) : SS_DISABLE; 224226031Sstas frame.sf_uc.uc_stack = td->td_sigstk; 225226031Sstas mtx_unlock(&psp->ps_mtx); 226226031Sstas PROC_UNLOCK(td->td_proc); 227 228 /* Copy the sigframe out to the user's stack. */ 229 if (copyout(&frame, fp, sizeof(*fp)) != 0) { 230 /* Process has trashed its stack. Kill it. */ 231 CTR2(KTR_SIG, "sendsig: sigexit td=%p fp=%p", td, fp); 232 PROC_LOCK(p); 233 sigexit(td, SIGILL); 234 } 235 236 /* Translate the signal if appropriate. */ 237 if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize) 238 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)]; 239 240 /* 241 * Build context to run handler in. We invoke the handler 242 * directly, only returning via the trampoline. Note the 243 * trampoline version numbers are coordinated with machine- 244 * dependent code in libc. 245 */ 246 247 tf->tf_r0 = sig; 248 tf->tf_r1 = (register_t)&fp->sf_si; 249 tf->tf_r2 = (register_t)&fp->sf_uc; 250 251 /* the trampoline uses r5 as the uc address */ 252 tf->tf_r5 = (register_t)&fp->sf_uc; 253 tf->tf_pc = (register_t)catcher; 254 tf->tf_usr_sp = (register_t)fp; 255 tf->tf_usr_lr = (register_t)(PS_STRINGS - *(p->p_sysent->sv_szsigcode)); 256 257 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, tf->tf_usr_lr, 258 tf->tf_usr_sp); 259 260 PROC_LOCK(p); 261 mtx_lock(&psp->ps_mtx); 262} 263 264struct kva_md_info kmi; 265 266/* 267 * arm32_vector_init: 268 * 269 * Initialize the vector page, and select whether or not to 270 * relocate the vectors. 271 * 272 * NOTE: We expect the vector page to be mapped at its expected 273 * destination. 274 */ 275 276extern unsigned int page0[], page0_data[]; 277void 278arm_vector_init(vm_offset_t va, int which) 279{ 280 unsigned int *vectors = (int *) va; 281 unsigned int *vectors_data = vectors + (page0_data - page0); 282 int vec; 283 284 /* 285 * Loop through the vectors we're taking over, and copy the 286 * vector's insn and data word. 287 */ 288 for (vec = 0; vec < ARM_NVEC; vec++) { 289 if ((which & (1 << vec)) == 0) { 290 /* Don't want to take over this vector. */ 291 continue; 292 } 293 vectors[vec] = page0[vec]; 294 vectors_data[vec] = page0_data[vec]; 295 } 296 297 /* Now sync the vectors. */ 298 cpu_icache_sync_range(va, (ARM_NVEC * 2) * sizeof(u_int)); 299 300 vector_page = va; 301 302 if (va == ARM_VECTORS_HIGH) { 303 /* 304 * Assume the MD caller knows what it's doing here, and 305 * really does want the vector page relocated. 306 * 307 * Note: This has to be done here (and not just in 308 * cpu_setup()) because the vector page needs to be 309 * accessible *before* cpu_startup() is called. 310 * Think ddb(9) ... 311 * 312 * NOTE: If the CPU control register is not readable, 313 * this will totally fail! We'll just assume that 314 * any system that has high vector support has a 315 * readable CPU control register, for now. If we 316 * ever encounter one that does not, we'll have to 317 * rethink this. 318 */ 319 cpu_control(CPU_CONTROL_VECRELOC, CPU_CONTROL_VECRELOC); 320 } 321} 322 323static void 324cpu_startup(void *dummy) 325{ 326 struct pcb *pcb = thread0.td_pcb; 327#ifdef ARM_TP_ADDRESS 328#ifndef ARM_CACHE_LOCK_ENABLE 329 vm_page_t m; 330#endif 331#endif 332 333 cpu_setup(""); 334 identify_arm_cpu(); 335 336 printf("real memory = %ju (%ju MB)\n", (uintmax_t)ptoa(physmem), 337 (uintmax_t)ptoa(physmem) / 1048576); 338 realmem = physmem; 339 340 /* 341 * Display the RAM layout. 342 */ 343 if (bootverbose) { 344 int indx; 345 346 printf("Physical memory chunk(s):\n"); 347 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) { 348 vm_paddr_t size; 349 350 size = phys_avail[indx + 1] - phys_avail[indx]; 351 printf("%#08jx - %#08jx, %ju bytes (%ju pages)\n", 352 (uintmax_t)phys_avail[indx], 353 (uintmax_t)phys_avail[indx + 1] - 1, 354 (uintmax_t)size, (uintmax_t)size / PAGE_SIZE); 355 } 356 } 357 358 vm_ksubmap_init(&kmi); 359 360 printf("avail memory = %ju (%ju MB)\n", 361 (uintmax_t)ptoa(cnt.v_free_count), 362 (uintmax_t)ptoa(cnt.v_free_count) / 1048576); 363 364 bufinit(); 365 vm_pager_bufferinit(); 366 pcb->un_32.pcb32_und_sp = (u_int)thread0.td_kstack + 367 USPACE_UNDEF_STACK_TOP; 368 pcb->un_32.pcb32_sp = (u_int)thread0.td_kstack + 369 USPACE_SVC_STACK_TOP; 370 vector_page_setprot(VM_PROT_READ); 371 pmap_set_pcb_pagedir(pmap_kernel(), pcb); 372 pmap_postinit(); 373#ifdef ARM_TP_ADDRESS 374#ifdef ARM_CACHE_LOCK_ENABLE 375 pmap_kenter_user(ARM_TP_ADDRESS, ARM_TP_ADDRESS); 376 arm_lock_cache_line(ARM_TP_ADDRESS); 377#else 378 m = vm_page_alloc(NULL, 0, VM_ALLOC_NOOBJ | VM_ALLOC_ZERO); 379 pmap_kenter_user(ARM_TP_ADDRESS, VM_PAGE_TO_PHYS(m)); 380#endif 381 *(uint32_t *)ARM_RAS_START = 0; 382 *(uint32_t *)ARM_RAS_END = 0xffffffff; 383#endif 384} 385 386SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL); 387 388/* 389 * Flush the D-cache for non-DMA I/O so that the I-cache can 390 * be made coherent later. 391 */ 392void 393cpu_flush_dcache(void *ptr, size_t len) 394{ 395 396 cpu_dcache_wb_range((uintptr_t)ptr, len); 397 cpu_l2cache_wb_range((uintptr_t)ptr, len); 398} 399 400/* Get current clock frequency for the given cpu id. */ 401int 402cpu_est_clockrate(int cpu_id, uint64_t *rate) 403{ 404 405 return (ENXIO); 406} 407 408void 409cpu_idle(int busy) 410{ 411 412#ifndef NO_EVENTTIMERS 413 if (!busy) { 414 critical_enter(); 415 cpu_idleclock(); 416 } 417#endif 418 cpu_sleep(0); 419#ifndef NO_EVENTTIMERS 420 if (!busy) { 421 cpu_activeclock(); 422 critical_exit(); 423 } 424#endif 425} 426 427int 428cpu_idle_wakeup(int cpu) 429{ 430 431 return (0); 432} 433 434int 435fill_regs(struct thread *td, struct reg *regs) 436{ 437 struct trapframe *tf = td->td_frame; 438 bcopy(&tf->tf_r0, regs->r, sizeof(regs->r)); 439 regs->r_sp = tf->tf_usr_sp; 440 regs->r_lr = tf->tf_usr_lr; 441 regs->r_pc = tf->tf_pc; 442 regs->r_cpsr = tf->tf_spsr; 443 return (0); 444} 445int 446fill_fpregs(struct thread *td, struct fpreg *regs) 447{ 448 bzero(regs, sizeof(*regs)); 449 return (0); 450} 451 452int 453set_regs(struct thread *td, struct reg *regs) 454{ 455 struct trapframe *tf = td->td_frame; 456 457 bcopy(regs->r, &tf->tf_r0, sizeof(regs->r)); 458 tf->tf_usr_sp = regs->r_sp; 459 tf->tf_usr_lr = regs->r_lr; 460 tf->tf_pc = regs->r_pc; 461 tf->tf_spsr &= ~PSR_FLAGS; 462 tf->tf_spsr |= regs->r_cpsr & PSR_FLAGS; 463 return (0); 464} 465 466int 467set_fpregs(struct thread *td, struct fpreg *regs) 468{ 469 return (0); 470} 471 472int 473fill_dbregs(struct thread *td, struct dbreg *regs) 474{ 475 return (0); 476} 477int 478set_dbregs(struct thread *td, struct dbreg *regs) 479{ 480 return (0); 481} 482 483 484static int 485ptrace_read_int(struct thread *td, vm_offset_t addr, u_int32_t *v) 486{ 487 struct iovec iov; 488 struct uio uio; 489 490 PROC_LOCK_ASSERT(td->td_proc, MA_NOTOWNED); 491 iov.iov_base = (caddr_t) v; 492 iov.iov_len = sizeof(u_int32_t); 493 uio.uio_iov = &iov; 494 uio.uio_iovcnt = 1; 495 uio.uio_offset = (off_t)addr; 496 uio.uio_resid = sizeof(u_int32_t); 497 uio.uio_segflg = UIO_SYSSPACE; 498 uio.uio_rw = UIO_READ; 499 uio.uio_td = td; 500 return proc_rwmem(td->td_proc, &uio); 501} 502 503static int 504ptrace_write_int(struct thread *td, vm_offset_t addr, u_int32_t v) 505{ 506 struct iovec iov; 507 struct uio uio; 508 509 PROC_LOCK_ASSERT(td->td_proc, MA_NOTOWNED); 510 iov.iov_base = (caddr_t) &v; 511 iov.iov_len = sizeof(u_int32_t); 512 uio.uio_iov = &iov; 513 uio.uio_iovcnt = 1; 514 uio.uio_offset = (off_t)addr; 515 uio.uio_resid = sizeof(u_int32_t); 516 uio.uio_segflg = UIO_SYSSPACE; 517 uio.uio_rw = UIO_WRITE; 518 uio.uio_td = td; 519 return proc_rwmem(td->td_proc, &uio); 520} 521 522int 523ptrace_single_step(struct thread *td) 524{ 525 struct proc *p; 526 int error; 527 528 KASSERT(td->td_md.md_ptrace_instr == 0, 529 ("Didn't clear single step")); 530 p = td->td_proc; 531 PROC_UNLOCK(p); 532 error = ptrace_read_int(td, td->td_frame->tf_pc + 4, 533 &td->td_md.md_ptrace_instr); 534 if (error) 535 goto out; 536 error = ptrace_write_int(td, td->td_frame->tf_pc + 4, 537 PTRACE_BREAKPOINT); 538 if (error) 539 td->td_md.md_ptrace_instr = 0; 540 td->td_md.md_ptrace_addr = td->td_frame->tf_pc + 4; 541out: 542 PROC_LOCK(p); 543 return (error); 544} 545 546int 547ptrace_clear_single_step(struct thread *td) 548{ 549 struct proc *p; 550 551 if (td->td_md.md_ptrace_instr) { 552 p = td->td_proc; 553 PROC_UNLOCK(p); 554 ptrace_write_int(td, td->td_md.md_ptrace_addr, 555 td->td_md.md_ptrace_instr); 556 PROC_LOCK(p); 557 td->td_md.md_ptrace_instr = 0; 558 } 559 return (0); 560} 561 562int 563ptrace_set_pc(struct thread *td, unsigned long addr) 564{ 565 td->td_frame->tf_pc = addr; 566 return (0); 567} 568 569void 570cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size) 571{ 572} 573 574void 575spinlock_enter(void) 576{ 577 struct thread *td; 578 register_t cspr; 579 580 td = curthread; 581 if (td->td_md.md_spinlock_count == 0) { 582 cspr = disable_interrupts(I32_bit | F32_bit); 583 td->td_md.md_spinlock_count = 1; 584 td->td_md.md_saved_cspr = cspr; 585 } else 586 td->td_md.md_spinlock_count++; 587 critical_enter(); 588} 589 590void 591spinlock_exit(void) 592{ 593 struct thread *td; 594 register_t cspr; 595 596 td = curthread; 597 critical_exit(); 598 cspr = td->td_md.md_saved_cspr; 599 td->td_md.md_spinlock_count--; 600 if (td->td_md.md_spinlock_count == 0) 601 restore_interrupts(cspr); 602} 603 604/* 605 * Clear registers on exec 606 */ 607void 608exec_setregs(struct thread *td, struct image_params *imgp, u_long stack) 609{ 610 struct trapframe *tf = td->td_frame; 611 612 memset(tf, 0, sizeof(*tf)); 613 tf->tf_usr_sp = stack; 614 tf->tf_usr_lr = imgp->entry_addr; 615 tf->tf_svc_lr = 0x77777777; 616 tf->tf_pc = imgp->entry_addr; 617 tf->tf_spsr = PSR_USR32_MODE; 618} 619 620/* 621 * Get machine context. 622 */ 623int 624get_mcontext(struct thread *td, mcontext_t *mcp, int clear_ret) 625{ 626 struct trapframe *tf = td->td_frame; 627 __greg_t *gr = mcp->__gregs; 628 629 if (clear_ret & GET_MC_CLEAR_RET) 630 gr[_REG_R0] = 0; 631 else 632 gr[_REG_R0] = tf->tf_r0; 633 gr[_REG_R1] = tf->tf_r1; 634 gr[_REG_R2] = tf->tf_r2; 635 gr[_REG_R3] = tf->tf_r3; 636 gr[_REG_R4] = tf->tf_r4; 637 gr[_REG_R5] = tf->tf_r5; 638 gr[_REG_R6] = tf->tf_r6; 639 gr[_REG_R7] = tf->tf_r7; 640 gr[_REG_R8] = tf->tf_r8; 641 gr[_REG_R9] = tf->tf_r9; 642 gr[_REG_R10] = tf->tf_r10; 643 gr[_REG_R11] = tf->tf_r11; 644 gr[_REG_R12] = tf->tf_r12; 645 gr[_REG_SP] = tf->tf_usr_sp; 646 gr[_REG_LR] = tf->tf_usr_lr; 647 gr[_REG_PC] = tf->tf_pc; 648 gr[_REG_CPSR] = tf->tf_spsr; 649 650 return (0); 651} 652 653/* 654 * Set machine context. 655 * 656 * However, we don't set any but the user modifiable flags, and we won't 657 * touch the cs selector. 658 */ 659int 660set_mcontext(struct thread *td, const mcontext_t *mcp) 661{ 662 struct trapframe *tf = td->td_frame; 663 const __greg_t *gr = mcp->__gregs; 664 665 tf->tf_r0 = gr[_REG_R0]; 666 tf->tf_r1 = gr[_REG_R1]; 667 tf->tf_r2 = gr[_REG_R2]; 668 tf->tf_r3 = gr[_REG_R3]; 669 tf->tf_r4 = gr[_REG_R4]; 670 tf->tf_r5 = gr[_REG_R5]; 671 tf->tf_r6 = gr[_REG_R6]; 672 tf->tf_r7 = gr[_REG_R7]; 673 tf->tf_r8 = gr[_REG_R8]; 674 tf->tf_r9 = gr[_REG_R9]; 675 tf->tf_r10 = gr[_REG_R10]; 676 tf->tf_r11 = gr[_REG_R11]; 677 tf->tf_r12 = gr[_REG_R12]; 678 tf->tf_usr_sp = gr[_REG_SP]; 679 tf->tf_usr_lr = gr[_REG_LR]; 680 tf->tf_pc = gr[_REG_PC]; 681 tf->tf_spsr = gr[_REG_CPSR]; 682 683 return (0); 684} 685 686/* 687 * MPSAFE 688 */ 689int 690sys_sigreturn(td, uap) 691 struct thread *td; 692 struct sigreturn_args /* { 693 const struct __ucontext *sigcntxp; 694 } */ *uap; 695{ 696 struct sigframe sf; 697 struct trapframe *tf; 698 int spsr; 699 700 if (uap == NULL) 701 return (EFAULT); 702 if (copyin(uap->sigcntxp, &sf, sizeof(sf))) 703 return (EFAULT); 704 /* 705 * Make sure the processor mode has not been tampered with and 706 * interrupts have not been disabled. 707 */ 708 spsr = sf.sf_uc.uc_mcontext.__gregs[_REG_CPSR]; 709 if ((spsr & PSR_MODE) != PSR_USR32_MODE || 710 (spsr & (I32_bit | F32_bit)) != 0) 711 return (EINVAL); 712 /* Restore register context. */ 713 tf = td->td_frame; 714 set_mcontext(td, &sf.sf_uc.uc_mcontext); 715 716 /* Restore signal mask. */ 717 kern_sigprocmask(td, SIG_SETMASK, &sf.sf_uc.uc_sigmask, NULL, 0); 718 719 return (EJUSTRETURN); 720} 721 722 723/* 724 * Construct a PCB from a trapframe. This is called from kdb_trap() where 725 * we want to start a backtrace from the function that caused us to enter 726 * the debugger. We have the context in the trapframe, but base the trace 727 * on the PCB. The PCB doesn't have to be perfect, as long as it contains 728 * enough for a backtrace. 729 */ 730void 731makectx(struct trapframe *tf, struct pcb *pcb) 732{ 733 pcb->un_32.pcb32_r8 = tf->tf_r8; 734 pcb->un_32.pcb32_r9 = tf->tf_r9; 735 pcb->un_32.pcb32_r10 = tf->tf_r10; 736 pcb->un_32.pcb32_r11 = tf->tf_r11; 737 pcb->un_32.pcb32_r12 = tf->tf_r12; 738 pcb->un_32.pcb32_pc = tf->tf_pc; 739 pcb->un_32.pcb32_lr = tf->tf_usr_lr; 740 pcb->un_32.pcb32_sp = tf->tf_usr_sp; 741} 742 743/* 744 * Make a standard dump_avail array. Can't make the phys_avail 745 * since we need to do that after we call pmap_bootstrap, but this 746 * is needed before pmap_boostrap. 747 * 748 * ARM_USE_SMALL_ALLOC uses dump_avail, so it must be filled before 749 * calling pmap_bootstrap. 750 */ 751void 752arm_dump_avail_init(vm_offset_t ramsize, size_t max) 753{ 754#ifdef LINUX_BOOT_ABI 755 /* 756 * Linux boot loader passes us the actual banks of memory, so use them 757 * to construct the dump_avail array. 758 */ 759 if (membanks > 0) 760 { 761 int i, j; 762 763 if (max < (membanks + 1) * 2) 764 panic("dump_avail[%d] too small for %d banks\n", 765 max, membanks); 766 for (j = 0, i = 0; i < membanks; i++) { 767 dump_avail[j++] = round_page(memstart[i]); 768 dump_avail[j++] = trunc_page(memstart[i] + memsize[i]); 769 } 770 dump_avail[j++] = 0; 771 dump_avail[j++] = 0; 772 return; 773 } 774#endif 775 if (max < 4) 776 panic("dump_avail too small\n"); 777 778 dump_avail[0] = round_page(PHYSADDR); 779 dump_avail[1] = trunc_page(PHYSADDR + ramsize); 780 dump_avail[2] = 0; 781 dump_avail[3] = 0; 782} 783 784/* 785 * Fake up a boot descriptor table 786 */ 787vm_offset_t 788fake_preload_metadata(struct arm_boot_params *abp __unused) 789{ 790#ifdef DDB 791 vm_offset_t zstart = 0, zend = 0; 792#endif 793 vm_offset_t lastaddr; 794 int i = 0; 795 static uint32_t fake_preload[35]; 796 797 fake_preload[i++] = MODINFO_NAME; 798 fake_preload[i++] = strlen("kernel") + 1; 799 strcpy((char*)&fake_preload[i++], "kernel"); 800 i += 1; 801 fake_preload[i++] = MODINFO_TYPE; 802 fake_preload[i++] = strlen("elf kernel") + 1; 803 strcpy((char*)&fake_preload[i++], "elf kernel"); 804 i += 2; 805 fake_preload[i++] = MODINFO_ADDR; 806 fake_preload[i++] = sizeof(vm_offset_t); 807 fake_preload[i++] = KERNVIRTADDR; 808 fake_preload[i++] = MODINFO_SIZE; 809 fake_preload[i++] = sizeof(uint32_t); 810 fake_preload[i++] = (uint32_t)&end - KERNVIRTADDR; 811#ifdef DDB 812 if (*(uint32_t *)KERNVIRTADDR == MAGIC_TRAMP_NUMBER) { 813 fake_preload[i++] = MODINFO_METADATA|MODINFOMD_SSYM; 814 fake_preload[i++] = sizeof(vm_offset_t); 815 fake_preload[i++] = *(uint32_t *)(KERNVIRTADDR + 4); 816 fake_preload[i++] = MODINFO_METADATA|MODINFOMD_ESYM; 817 fake_preload[i++] = sizeof(vm_offset_t); 818 fake_preload[i++] = *(uint32_t *)(KERNVIRTADDR + 8); 819 lastaddr = *(uint32_t *)(KERNVIRTADDR + 8); 820 zend = lastaddr; 821 zstart = *(uint32_t *)(KERNVIRTADDR + 4); 822 ksym_start = zstart; 823 ksym_end = zend; 824 } else 825#endif 826 lastaddr = (vm_offset_t)&end; 827 fake_preload[i++] = 0; 828 fake_preload[i] = 0; 829 preload_metadata = (void *)fake_preload; 830 831 return (lastaddr); 832} 833 834void 835pcpu0_init(void) 836{ 837#if ARM_ARCH_6 || ARM_ARCH_7A || defined(CPU_MV_PJ4B) 838 set_pcpu(pcpup); 839#endif 840 pcpu_init(pcpup, 0, sizeof(struct pcpu)); 841 PCPU_SET(curthread, &thread0); 842#ifdef ARM_VFP_SUPPORT 843 PCPU_SET(cpu, 0); 844#endif 845} 846 847#if defined(LINUX_BOOT_ABI) 848vm_offset_t 849linux_parse_boot_param(struct arm_boot_params *abp) 850{ 851 struct arm_lbabi_tag *walker; 852 853 /* 854 * Linux boot ABI: r0 = 0, r1 is the board type (!= 0) and r2 855 * is atags or dtb pointer. If all of these aren't satisfied, 856 * then punt. 857 */ 858 if (!(abp->abp_r0 == 0 && abp->abp_r1 != 0 && abp->abp_r2 != 0)) 859 return 0; 860 861 board_id = abp->abp_r1; 862 walker = (struct arm_lbabi_tag *) 863 (abp->abp_r2 + KERNVIRTADDR - KERNPHYSADDR); 864 865 /* xxx - Need to also look for binary device tree */ 866 if (ATAG_TAG(walker) != ATAG_CORE) 867 return 0; 868 869 atag_list = walker; 870 while (ATAG_TAG(walker) != ATAG_NONE) { 871 switch (ATAG_TAG(walker)) { 872 case ATAG_CORE: 873 break; 874 case ATAG_MEM: 875 if (membanks < LBABI_MAX_BANKS) { 876 memstart[membanks] = walker->u.tag_mem.start; 877 memsize[membanks] = walker->u.tag_mem.size; 878 } 879 membanks++; 880 break; 881 case ATAG_INITRD2: 882 break; 883 case ATAG_SERIAL: 884 serial = walker->u.tag_sn.low | 885 ((uint64_t)walker->u.tag_sn.high << 32); 886 break; 887 case ATAG_REVISION: 888 revision = walker->u.tag_rev.rev; 889 break; 890 case ATAG_CMDLINE: 891 /* XXX open question: Parse this for boothowto? */ 892 bcopy(walker->u.tag_cmd.command, linux_command_line, 893 ATAG_SIZE(walker)); 894 break; 895 default: 896 break; 897 } 898 walker = ATAG_NEXT(walker); 899 } 900 901 /* Save a copy for later */ 902 bcopy(atag_list, atags, 903 (char *)walker - (char *)atag_list + ATAG_SIZE(walker)); 904 905 return fake_preload_metadata(abp); 906} 907#endif 908 909#if defined(FREEBSD_BOOT_LOADER) 910vm_offset_t 911freebsd_parse_boot_param(struct arm_boot_params *abp) 912{ 913 vm_offset_t lastaddr = 0; 914 void *mdp; 915 void *kmdp; 916 917 /* 918 * Mask metadata pointer: it is supposed to be on page boundary. If 919 * the first argument (mdp) doesn't point to a valid address the 920 * bootloader must have passed us something else than the metadata 921 * ptr, so we give up. Also give up if we cannot find metadta section 922 * the loader creates that we get all this data out of. 923 */ 924 925 if ((mdp = (void *)(abp->abp_r0 & ~PAGE_MASK)) == NULL) 926 return 0; 927 preload_metadata = mdp; 928 kmdp = preload_search_by_type("elf kernel"); 929 if (kmdp == NULL) 930 return 0; 931 932 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 933 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 934 lastaddr = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); 935#ifdef DDB 936 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); 937 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); 938#endif 939 preload_addr_relocate = KERNVIRTADDR - KERNPHYSADDR; 940 return lastaddr; 941} 942#endif 943 944vm_offset_t 945default_parse_boot_param(struct arm_boot_params *abp) 946{ 947 vm_offset_t lastaddr; 948 949#if defined(LINUX_BOOT_ABI) 950 if ((lastaddr = linux_parse_boot_param(abp)) != 0) 951 return lastaddr; 952#endif 953#if defined(FREEBSD_BOOT_LOADER) 954 if ((lastaddr = freebsd_parse_boot_param(abp)) != 0) 955 return lastaddr; 956#endif 957 /* Fall back to hardcoded metadata. */ 958 lastaddr = fake_preload_metadata(abp); 959 960 return lastaddr; 961} 962 963/* 964 * Stub version of the boot parameter parsing routine. We are 965 * called early in initarm, before even VM has been initialized. 966 * This routine needs to preserve any data that the boot loader 967 * has passed in before the kernel starts to grow past the end 968 * of the BSS, traditionally the place boot-loaders put this data. 969 * 970 * Since this is called so early, things that depend on the vm system 971 * being setup (including access to some SoC's serial ports), about 972 * all that can be done in this routine is to copy the arguments. 973 * 974 * This is the default boot parameter parsing routine. Individual 975 * kernels/boards can override this weak function with one of their 976 * own. We just fake metadata... 977 */ 978__weak_reference(default_parse_boot_param, parse_boot_param); 979 980/* 981 * Initialize proc0 982 */ 983void 984init_proc0(vm_offset_t kstack) 985{ 986 proc_linkup0(&proc0, &thread0); 987 thread0.td_kstack = kstack; 988 thread0.td_pcb = (struct pcb *) 989 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1; 990 thread0.td_pcb->pcb_flags = 0; 991 thread0.td_frame = &proc0_tf; 992 pcpup->pc_curpcb = thread0.td_pcb; 993} 994 995void 996set_stackptrs(int cpu) 997{ 998 999 set_stackptr(PSR_IRQ32_MODE, 1000 irqstack.pv_va + ((IRQ_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1001 set_stackptr(PSR_ABT32_MODE, 1002 abtstack.pv_va + ((ABT_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1003 set_stackptr(PSR_UND32_MODE, 1004 undstack.pv_va + ((UND_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1005} 1006 1007#ifdef FDT 1008static char * 1009kenv_next(char *cp) 1010{ 1011 1012 if (cp != NULL) { 1013 while (*cp != 0) 1014 cp++; 1015 cp++; 1016 if (*cp == 0) 1017 cp = NULL; 1018 } 1019 return (cp); 1020} 1021 1022static void 1023print_kenv(void) 1024{ 1025 int len; 1026 char *cp; 1027 1028 debugf("loader passed (static) kenv:\n"); 1029 if (kern_envp == NULL) { 1030 debugf(" no env, null ptr\n"); 1031 return; 1032 } 1033 debugf(" kern_envp = 0x%08x\n", (uint32_t)kern_envp); 1034 1035 len = 0; 1036 for (cp = kern_envp; cp != NULL; cp = kenv_next(cp)) 1037 debugf(" %x %s\n", (uint32_t)cp, cp); 1038} 1039 1040static void 1041print_kernel_section_addr(void) 1042{ 1043 1044 debugf("kernel image addresses:\n"); 1045 debugf(" kernbase = 0x%08x\n", (uint32_t)kernbase); 1046 debugf(" _etext (sdata) = 0x%08x\n", (uint32_t)_etext); 1047 debugf(" _edata = 0x%08x\n", (uint32_t)_edata); 1048 debugf(" __bss_start = 0x%08x\n", (uint32_t)__bss_start); 1049 debugf(" _end = 0x%08x\n", (uint32_t)_end); 1050} 1051 1052static void 1053physmap_init(struct mem_region *availmem_regions, int availmem_regions_sz) 1054{ 1055 int i, j, cnt; 1056 vm_offset_t phys_kernelend, kernload; 1057 uint32_t s, e, sz; 1058 struct mem_region *mp, *mp1; 1059 1060 phys_kernelend = KERNPHYSADDR + (virtual_avail - KERNVIRTADDR); 1061 kernload = KERNPHYSADDR; 1062 1063 /* 1064 * Remove kernel physical address range from avail 1065 * regions list. Page align all regions. 1066 * Non-page aligned memory isn't very interesting to us. 1067 * Also, sort the entries for ascending addresses. 1068 */ 1069 sz = 0; 1070 cnt = availmem_regions_sz; 1071 debugf("processing avail regions:\n"); 1072 for (mp = availmem_regions; mp->mr_size; mp++) { 1073 s = mp->mr_start; 1074 e = mp->mr_start + mp->mr_size; 1075 debugf(" %08x-%08x -> ", s, e); 1076 /* Check whether this region holds all of the kernel. */ 1077 if (s < kernload && e > phys_kernelend) { 1078 availmem_regions[cnt].mr_start = phys_kernelend; 1079 availmem_regions[cnt++].mr_size = e - phys_kernelend; 1080 e = kernload; 1081 } 1082 /* Look whether this regions starts within the kernel. */ 1083 if (s >= kernload && s < phys_kernelend) { 1084 if (e <= phys_kernelend) 1085 goto empty; 1086 s = phys_kernelend; 1087 } 1088 /* Now look whether this region ends within the kernel. */ 1089 if (e > kernload && e <= phys_kernelend) { 1090 if (s >= kernload) { 1091 goto empty; 1092 } 1093 e = kernload; 1094 } 1095 /* Now page align the start and size of the region. */ 1096 s = round_page(s); 1097 e = trunc_page(e); 1098 if (e < s) 1099 e = s; 1100 sz = e - s; 1101 debugf("%08x-%08x = %x\n", s, e, sz); 1102 1103 /* Check whether some memory is left here. */ 1104 if (sz == 0) { 1105 empty: 1106 printf("skipping\n"); 1107 bcopy(mp + 1, mp, 1108 (cnt - (mp - availmem_regions)) * sizeof(*mp)); 1109 cnt--; 1110 mp--; 1111 continue; 1112 } 1113 1114 /* Do an insertion sort. */ 1115 for (mp1 = availmem_regions; mp1 < mp; mp1++) 1116 if (s < mp1->mr_start) 1117 break; 1118 if (mp1 < mp) { 1119 bcopy(mp1, mp1 + 1, (char *)mp - (char *)mp1); 1120 mp1->mr_start = s; 1121 mp1->mr_size = sz; 1122 } else { 1123 mp->mr_start = s; 1124 mp->mr_size = sz; 1125 } 1126 } 1127 availmem_regions_sz = cnt; 1128 1129 /* Fill in phys_avail table, based on availmem_regions */ 1130 debugf("fill in phys_avail:\n"); 1131 for (i = 0, j = 0; i < availmem_regions_sz; i++, j += 2) { 1132 1133 debugf(" region: 0x%08x - 0x%08x (0x%08x)\n", 1134 availmem_regions[i].mr_start, 1135 availmem_regions[i].mr_start + availmem_regions[i].mr_size, 1136 availmem_regions[i].mr_size); 1137 1138 /* 1139 * We should not map the page at PA 0x0000000, the VM can't 1140 * handle it, as pmap_extract() == 0 means failure. 1141 */ 1142 if (availmem_regions[i].mr_start > 0 || 1143 availmem_regions[i].mr_size > PAGE_SIZE) { 1144 phys_avail[j] = availmem_regions[i].mr_start; 1145 if (phys_avail[j] == 0) 1146 phys_avail[j] += PAGE_SIZE; 1147 phys_avail[j + 1] = availmem_regions[i].mr_start + 1148 availmem_regions[i].mr_size; 1149 } else 1150 j -= 2; 1151 } 1152 phys_avail[j] = 0; 1153 phys_avail[j + 1] = 0; 1154} 1155 1156void * 1157initarm(struct arm_boot_params *abp) 1158{ 1159 struct mem_region availmem_regions[FDT_MEM_REGIONS]; 1160 struct pv_addr kernel_l1pt; 1161 struct pv_addr dpcpu; 1162 vm_offset_t dtbp, freemempos, l2_start, lastaddr; 1163 vm_offset_t pmap_bootstrap_lastaddr; 1164 uint32_t memsize, l2size; 1165 char *env; 1166 void *kmdp; 1167 u_int l1pagetable; 1168 int i = 0, j = 0, err_devmap = 0; 1169 int availmem_regions_sz; 1170 1171 lastaddr = parse_boot_param(abp); 1172 memsize = 0; 1173 set_cpufuncs(); 1174 1175 /* 1176 * Find the dtb passed in by the boot loader. 1177 */ 1178 kmdp = preload_search_by_type("elf kernel"); 1179 if (kmdp != NULL) 1180 dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t); 1181 else 1182 dtbp = (vm_offset_t)NULL; 1183 1184#if defined(FDT_DTB_STATIC) 1185 /* 1186 * In case the device tree blob was not retrieved (from metadata) try 1187 * to use the statically embedded one. 1188 */ 1189 if (dtbp == (vm_offset_t)NULL) 1190 dtbp = (vm_offset_t)&fdt_static_dtb; 1191#endif 1192 1193 if (OF_install(OFW_FDT, 0) == FALSE) 1194 while (1); 1195 1196 if (OF_init((void *)dtbp) != 0) 1197 while (1); 1198 1199 /* Grab physical memory regions information from device tree. */ 1200 if (fdt_get_mem_regions(availmem_regions, &availmem_regions_sz, 1201 &memsize) != 0) 1202 while(1); 1203 1204 /* Platform-specific initialisation */ 1205 pmap_bootstrap_lastaddr = initarm_lastaddr(); 1206 1207 pcpu0_init(); 1208 1209 /* Calculate number of L2 tables needed for mapping vm_page_array */ 1210 l2size = (memsize / PAGE_SIZE) * sizeof(struct vm_page); 1211 l2size = (l2size >> L1_S_SHIFT) + 1; 1212 1213 /* 1214 * Add one table for end of kernel map, one for stacks, msgbuf and 1215 * L1 and L2 tables map and one for vectors map. 1216 */ 1217 l2size += 3; 1218 1219 /* Make it divisible by 4 */ 1220 l2size = (l2size + 3) & ~3; 1221 1222#define KERNEL_TEXT_BASE (KERNBASE) 1223 freemempos = (lastaddr + PAGE_MASK) & ~PAGE_MASK; 1224 1225 /* Define a macro to simplify memory allocation */ 1226#define valloc_pages(var, np) \ 1227 alloc_pages((var).pv_va, (np)); \ 1228 (var).pv_pa = (var).pv_va + (KERNPHYSADDR - KERNVIRTADDR); 1229 1230#define alloc_pages(var, np) \ 1231 (var) = freemempos; \ 1232 freemempos += (np * PAGE_SIZE); \ 1233 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 1234 1235 while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0) 1236 freemempos += PAGE_SIZE; 1237 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 1238 1239 for (i = 0; i < l2size; ++i) { 1240 if (!(i % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) { 1241 valloc_pages(kernel_pt_table[i], 1242 L2_TABLE_SIZE / PAGE_SIZE); 1243 j = i; 1244 } else { 1245 kernel_pt_table[i].pv_va = kernel_pt_table[j].pv_va + 1246 L2_TABLE_SIZE_REAL * (i - j); 1247 kernel_pt_table[i].pv_pa = 1248 kernel_pt_table[i].pv_va - KERNVIRTADDR + 1249 KERNPHYSADDR; 1250 1251 } 1252 } 1253 /* 1254 * Allocate a page for the system page mapped to 0x00000000 1255 * or 0xffff0000. This page will just contain the system vectors 1256 * and can be shared by all processes. 1257 */ 1258 valloc_pages(systempage, 1); 1259 1260 /* Allocate dynamic per-cpu area. */ 1261 valloc_pages(dpcpu, DPCPU_SIZE / PAGE_SIZE); 1262 dpcpu_init((void *)dpcpu.pv_va, 0); 1263 1264 /* Allocate stacks for all modes */ 1265 valloc_pages(irqstack, (IRQ_STACK_SIZE * MAXCPU)); 1266 valloc_pages(abtstack, (ABT_STACK_SIZE * MAXCPU)); 1267 valloc_pages(undstack, (UND_STACK_SIZE * MAXCPU)); 1268 valloc_pages(kernelstack, (KSTACK_PAGES * MAXCPU)); 1269 1270 init_param1(); 1271 1272 valloc_pages(msgbufpv, round_page(msgbufsize) / PAGE_SIZE); 1273 1274 /* 1275 * Now we start construction of the L1 page table 1276 * We start by mapping the L2 page tables into the L1. 1277 * This means that we can replace L1 mappings later on if necessary 1278 */ 1279 l1pagetable = kernel_l1pt.pv_va; 1280 1281 /* 1282 * Try to map as much as possible of kernel text and data using 1283 * 1MB section mapping and for the rest of initial kernel address 1284 * space use L2 coarse tables. 1285 * 1286 * Link L2 tables for mapping remainder of kernel (modulo 1MB) 1287 * and kernel structures 1288 */ 1289 l2_start = lastaddr & ~(L1_S_OFFSET); 1290 for (i = 0 ; i < l2size - 1; i++) 1291 pmap_link_l2pt(l1pagetable, l2_start + i * L1_S_SIZE, 1292 &kernel_pt_table[i]); 1293 1294 pmap_curmaxkvaddr = l2_start + (l2size - 1) * L1_S_SIZE; 1295 1296 /* Map kernel code and data */ 1297 pmap_map_chunk(l1pagetable, KERNVIRTADDR, KERNPHYSADDR, 1298 (((uint32_t)(lastaddr) - KERNVIRTADDR) + PAGE_MASK) & ~PAGE_MASK, 1299 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 1300 1301 1302 /* Map L1 directory and allocated L2 page tables */ 1303 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 1304 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 1305 1306 pmap_map_chunk(l1pagetable, kernel_pt_table[0].pv_va, 1307 kernel_pt_table[0].pv_pa, 1308 L2_TABLE_SIZE_REAL * l2size, 1309 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 1310 1311 /* Map allocated DPCPU, stacks and msgbuf */ 1312 pmap_map_chunk(l1pagetable, dpcpu.pv_va, dpcpu.pv_pa, 1313 freemempos - dpcpu.pv_va, 1314 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 1315 1316 /* Link and map the vector page */ 1317 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH, 1318 &kernel_pt_table[l2size - 1]); 1319 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 1320 VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE, PTE_CACHE); 1321 1322 /* Map pmap_devmap[] entries */ 1323 err_devmap = platform_devmap_init(); 1324 pmap_devmap_bootstrap(l1pagetable, pmap_devmap_bootstrap_table); 1325 1326 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL * 2)) | 1327 DOMAIN_CLIENT); 1328 pmap_pa = kernel_l1pt.pv_pa; 1329 setttb(kernel_l1pt.pv_pa); 1330 cpu_tlb_flushID(); 1331 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL * 2)); 1332 1333 /* 1334 * Only after the SOC registers block is mapped we can perform device 1335 * tree fixups, as they may attempt to read parameters from hardware. 1336 */ 1337 OF_interpret("perform-fixup", 0); 1338 1339 initarm_gpio_init(); 1340 1341 cninit(); 1342 1343 physmem = memsize / PAGE_SIZE; 1344 1345 debugf("initarm: console initialized\n"); 1346 debugf(" arg1 kmdp = 0x%08x\n", (uint32_t)kmdp); 1347 debugf(" boothowto = 0x%08x\n", boothowto); 1348 debugf(" dtbp = 0x%08x\n", (uint32_t)dtbp); 1349 print_kernel_section_addr(); 1350 print_kenv(); 1351 1352 env = getenv("kernelname"); 1353 if (env != NULL) 1354 strlcpy(kernelname, env, sizeof(kernelname)); 1355 1356 if (err_devmap != 0) 1357 printf("WARNING: could not fully configure devmap, error=%d\n", 1358 err_devmap); 1359 1360 initarm_late_init(); 1361 1362 /* 1363 * Pages were allocated during the secondary bootstrap for the 1364 * stacks for different CPU modes. 1365 * We must now set the r13 registers in the different CPU modes to 1366 * point to these stacks. 1367 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 1368 * of the stack memory. 1369 */ 1370 cpu_control(CPU_CONTROL_MMU_ENABLE, CPU_CONTROL_MMU_ENABLE); 1371 1372 set_stackptrs(0); 1373 1374 /* 1375 * We must now clean the cache again.... 1376 * Cleaning may be done by reading new data to displace any 1377 * dirty data in the cache. This will have happened in setttb() 1378 * but since we are boot strapping the addresses used for the read 1379 * may have just been remapped and thus the cache could be out 1380 * of sync. A re-clean after the switch will cure this. 1381 * After booting there are no gross relocations of the kernel thus 1382 * this problem will not occur after initarm(). 1383 */ 1384 cpu_idcache_wbinv_all(); 1385 1386 /* Set stack for exception handlers */ 1387 data_abort_handler_address = (u_int)data_abort_handler; 1388 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 1389 undefined_handler_address = (u_int)undefinedinstruction_bounce; 1390 undefined_init(); 1391 1392 init_proc0(kernelstack.pv_va); 1393 1394 arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 1395 arm_dump_avail_init(memsize, sizeof(dump_avail) / sizeof(dump_avail[0])); 1396 pmap_bootstrap(freemempos, pmap_bootstrap_lastaddr, &kernel_l1pt); 1397 msgbufp = (void *)msgbufpv.pv_va; 1398 msgbufinit(msgbufp, msgbufsize); 1399 mutex_init(); 1400 1401 /* 1402 * Prepare map of physical memory regions available to vm subsystem. 1403 */ 1404 physmap_init(availmem_regions, availmem_regions_sz); 1405 1406 /* Do basic tuning, hz etc */ 1407 init_param2(physmem); 1408 kdb_init(); 1409 1410 return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP - 1411 sizeof(struct pcb))); 1412} 1413#endif 1414 1415