1129198Scognet/* $NetBSD: arm32_machdep.c,v 1.44 2004/03/24 15:34:47 atatat Exp $ */ 2129198Scognet 3139735Simp/*- 4129198Scognet * Copyright (c) 2004 Olivier Houchard 5129198Scognet * Copyright (c) 1994-1998 Mark Brinicombe. 6129198Scognet * Copyright (c) 1994 Brini. 7129198Scognet * All rights reserved. 8129198Scognet * 9129198Scognet * This code is derived from software written for Brini by Mark Brinicombe 10129198Scognet * 11129198Scognet * Redistribution and use in source and binary forms, with or without 12129198Scognet * modification, are permitted provided that the following conditions 13129198Scognet * are met: 14129198Scognet * 1. Redistributions of source code must retain the above copyright 15129198Scognet * notice, this list of conditions and the following disclaimer. 16129198Scognet * 2. Redistributions in binary form must reproduce the above copyright 17129198Scognet * notice, this list of conditions and the following disclaimer in the 18129198Scognet * documentation and/or other materials provided with the distribution. 19129198Scognet * 3. All advertising materials mentioning features or use of this software 20129198Scognet * must display the following acknowledgement: 21129198Scognet * This product includes software developed by Mark Brinicombe 22129198Scognet * for the NetBSD Project. 23129198Scognet * 4. The name of the company nor the name of the author may be used to 24129198Scognet * endorse or promote products derived from this software without specific 25129198Scognet * prior written permission. 26129198Scognet * 27129198Scognet * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 28129198Scognet * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 29129198Scognet * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 30129198Scognet * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 31129198Scognet * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 32129198Scognet * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 33129198Scognet * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34129198Scognet * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35129198Scognet * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36129198Scognet * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37129198Scognet * SUCH DAMAGE. 38129198Scognet * 39129198Scognet * Machine dependant functions for kernel setup 40129198Scognet * 41129198Scognet * Created : 17/09/94 42129198Scognet * Updated : 18/04/01 updated for new wscons 43129198Scognet */ 44129198Scognet 45129198Scognet#include "opt_compat.h" 46177883Simp#include "opt_ddb.h" 47242531Sandrew#include "opt_platform.h" 48247195Smav#include "opt_sched.h" 49239268Sgonzo#include "opt_timer.h" 50177883Simp 51129198Scognet#include <sys/cdefs.h> 52129198Scognet__FBSDID("$FreeBSD$"); 53129198Scognet 54129198Scognet#include <sys/param.h> 55141378Snjl#include <sys/proc.h> 56129198Scognet#include <sys/systm.h> 57141249Snjl#include <sys/bio.h> 58141249Snjl#include <sys/buf.h> 59141249Snjl#include <sys/bus.h> 60141378Snjl#include <sys/cons.h> 61141237Snjl#include <sys/cpu.h> 62141378Snjl#include <sys/exec.h> 63129198Scognet#include <sys/imgact.h> 64242531Sandrew#include <sys/kdb.h> 65129198Scognet#include <sys/kernel.h> 66166694Skevlo#include <sys/ktr.h> 67129198Scognet#include <sys/linker.h> 68129198Scognet#include <sys/lock.h> 69129198Scognet#include <sys/malloc.h> 70242531Sandrew#include <sys/msgbuf.h> 71129198Scognet#include <sys/mutex.h> 72129198Scognet#include <sys/pcpu.h> 73129198Scognet#include <sys/ptrace.h> 74248084Sattilio#include <sys/rwlock.h> 75247195Smav#include <sys/sched.h> 76141378Snjl#include <sys/signalvar.h> 77209613Sjhb#include <sys/syscallsubr.h> 78245079Sgonzo#include <sys/sysctl.h> 79135653Scognet#include <sys/sysent.h> 80141378Snjl#include <sys/sysproto.h> 81140001Scognet#include <sys/uio.h> 82129198Scognet 83141551Sjmg#include <vm/vm.h> 84129198Scognet#include <vm/pmap.h> 85141378Snjl#include <vm/vm_map.h> 86129198Scognet#include <vm/vm_object.h> 87129198Scognet#include <vm/vm_page.h> 88129198Scognet#include <vm/vm_pager.h> 89141378Snjl 90141378Snjl#include <machine/armreg.h> 91237044Simp#include <machine/atags.h> 92141378Snjl#include <machine/cpu.h> 93141378Snjl#include <machine/machdep.h> 94141378Snjl#include <machine/md_var.h> 95141378Snjl#include <machine/metadata.h> 96141378Snjl#include <machine/pcb.h> 97129198Scognet#include <machine/pmap.h> 98141378Snjl#include <machine/reg.h> 99141378Snjl#include <machine/trap.h> 100141378Snjl#include <machine/undefined.h> 101129198Scognet#include <machine/vmparam.h> 102142570Scognet#include <machine/sysarch.h> 103129198Scognet 104242531Sandrew#ifdef FDT 105242531Sandrew#include <dev/fdt/fdt_common.h> 106242531Sandrew#include <dev/ofw/openfirm.h> 107242531Sandrew#endif 108242531Sandrew 109242531Sandrew#ifdef DEBUG 110242531Sandrew#define debugf(fmt, args...) printf(fmt, ##args) 111242531Sandrew#else 112242531Sandrew#define debugf(fmt, args...) 113242531Sandrew#endif 114242531Sandrew 115239268Sgonzostruct pcpu __pcpu[MAXCPU]; 116239268Sgonzostruct pcpu *pcpup = &__pcpu[0]; 117239268Sgonzo 118236828Sandrewstatic struct trapframe proc0_tf; 119129198Scognetuint32_t cpu_reset_address = 0; 120129198Scognetint cold = 1; 121129198Scognetvm_offset_t vector_page; 122129198Scognet 123142947Scognetlong realmem = 0; 124142947Scognet 125150870Scognetint (*_arm_memcpy)(void *, void *, int, int) = NULL; 126150870Scognetint (*_arm_bzero)(void *, int, int) = NULL; 127150870Scognetint _min_memcpy_size = 0; 128150870Scognetint _min_bzero_size = 0; 129150870Scognet 130177883Simpextern int *end; 131177883Simp#ifdef DDB 132177883Simpextern vm_offset_t ksym_start, ksym_end; 133177883Simp#endif 134177883Simp 135242531Sandrew#ifdef FDT 136242531Sandrew/* 137242531Sandrew * This is the number of L2 page tables required for covering max 138242531Sandrew * (hypothetical) memsize of 4GB and all kernel mappings (vectors, msgbuf, 139242531Sandrew * stacks etc.), uprounded to be divisible by 4. 140242531Sandrew */ 141242531Sandrew#define KERNEL_PT_MAX 78 142242531Sandrew 143242531Sandrewstatic struct pv_addr kernel_pt_table[KERNEL_PT_MAX]; 144242531Sandrew 145242531Sandrewvm_paddr_t phys_avail[10]; 146242531Sandrewvm_paddr_t dump_avail[4]; 147242531Sandrew 148242531Sandrewextern u_int data_abort_handler_address; 149242531Sandrewextern u_int prefetch_abort_handler_address; 150242531Sandrewextern u_int undefined_handler_address; 151242531Sandrew 152242531Sandrewvm_paddr_t pmap_pa; 153242531Sandrew 154242531Sandrewstruct pv_addr systempage; 155242531Sandrewstatic struct pv_addr msgbufpv; 156242531Sandrewstruct pv_addr irqstack; 157242531Sandrewstruct pv_addr undstack; 158242531Sandrewstruct pv_addr abtstack; 159242531Sandrewstatic struct pv_addr kernelstack; 160242531Sandrew 161242531Sandrewconst struct pmap_devmap *pmap_devmap_bootstrap_table; 162242531Sandrew#endif 163242531Sandrew 164237044Simp#if defined(LINUX_BOOT_ABI) 165237044Simp#define LBABI_MAX_BANKS 10 166237044Simp 167237044Simpuint32_t board_id; 168237044Simpstruct arm_lbabi_tag *atag_list; 169237044Simpchar linux_command_line[LBABI_MAX_COMMAND_LINE + 1]; 170237044Simpchar atags[LBABI_MAX_COMMAND_LINE * 2]; 171237044Simpuint32_t memstart[LBABI_MAX_BANKS]; 172237044Simpuint32_t memsize[LBABI_MAX_BANKS]; 173237044Simpuint32_t membanks; 174237044Simp#endif 175237044Simp 176245079Sgonzostatic uint32_t board_revision; 177245079Sgonzo/* hex representation of uint64_t */ 178245079Sgonzostatic char board_serial[32]; 179245079Sgonzo 180245079SgonzoSYSCTL_NODE(_hw, OID_AUTO, board, CTLFLAG_RD, 0, "Board attributes"); 181245079SgonzoSYSCTL_UINT(_hw_board, OID_AUTO, revision, CTLFLAG_RD, 182245079Sgonzo &board_revision, 0, "Board revision"); 183245079SgonzoSYSCTL_STRING(_hw_board, OID_AUTO, serial, CTLFLAG_RD, 184245079Sgonzo board_serial, 0, "Board serial"); 185245079Sgonzo 186249176Sandrewint vfp_exists; 187249176SandrewSYSCTL_INT(_hw, HW_FLOATINGPT, floatingpoint, CTLFLAG_RD, 188249176Sandrew &vfp_exists, 0, "Floating point support enabled"); 189249176Sandrew 190129198Scognetvoid 191245079Sgonzoboard_set_serial(uint64_t serial) 192245079Sgonzo{ 193245079Sgonzo 194245079Sgonzo snprintf(board_serial, sizeof(board_serial)-1, 195245079Sgonzo "%016jx", serial); 196245079Sgonzo} 197245079Sgonzo 198245079Sgonzovoid 199245079Sgonzoboard_set_revision(uint32_t revision) 200245079Sgonzo{ 201245079Sgonzo 202245079Sgonzo board_revision = revision; 203245079Sgonzo} 204245079Sgonzo 205245079Sgonzovoid 206151316Sdavidxusendsig(catcher, ksi, mask) 207129198Scognet sig_t catcher; 208151316Sdavidxu ksiginfo_t *ksi; 209129198Scognet sigset_t *mask; 210129198Scognet{ 211166694Skevlo struct thread *td; 212166694Skevlo struct proc *p; 213166694Skevlo struct trapframe *tf; 214129198Scognet struct sigframe *fp, frame; 215166694Skevlo struct sigacts *psp; 216129198Scognet int onstack; 217151316Sdavidxu int sig; 218151316Sdavidxu int code; 219129198Scognet 220166694Skevlo td = curthread; 221166694Skevlo p = td->td_proc; 222166694Skevlo PROC_LOCK_ASSERT(p, MA_OWNED); 223151316Sdavidxu sig = ksi->ksi_signo; 224151316Sdavidxu code = ksi->ksi_code; 225166694Skevlo psp = p->p_sigacts; 226166694Skevlo mtx_assert(&psp->ps_mtx, MA_OWNED); 227166694Skevlo tf = td->td_frame; 228166694Skevlo onstack = sigonstack(tf->tf_usr_sp); 229166694Skevlo 230166694Skevlo CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm, 231166694Skevlo catcher, sig); 232166694Skevlo 233166694Skevlo /* Allocate and validate space for the signal handler context. */ 234230455Spjd if ((td->td_pflags & TDP_ALTSTACK) != 0 && !(onstack) && 235166694Skevlo SIGISMEMBER(psp->ps_sigonstack, sig)) { 236236991Simp fp = (struct sigframe *)(td->td_sigstk.ss_sp + 237166694Skevlo td->td_sigstk.ss_size); 238166694Skevlo#if defined(COMPAT_43) 239137215Scognet td->td_sigstk.ss_flags |= SS_ONSTACK; 240166694Skevlo#endif 241137215Scognet } else 242166694Skevlo fp = (struct sigframe *)td->td_frame->tf_usr_sp; 243236991Simp 244129198Scognet /* make room on the stack */ 245129198Scognet fp--; 246129198Scognet 247129198Scognet /* make the stack aligned */ 248135653Scognet fp = (struct sigframe *)STACKALIGN(fp); 249129198Scognet /* Populate the siginfo frame. */ 250166694Skevlo get_mcontext(td, &frame.sf_uc.uc_mcontext, 0); 251151316Sdavidxu frame.sf_si = ksi->ksi_info; 252129198Scognet frame.sf_uc.uc_sigmask = *mask; 253236991Simp frame.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK ) 254137215Scognet ? ((onstack) ? SS_ONSTACK : 0) : SS_DISABLE; 255135653Scognet frame.sf_uc.uc_stack = td->td_sigstk; 256166694Skevlo mtx_unlock(&psp->ps_mtx); 257129198Scognet PROC_UNLOCK(td->td_proc); 258166694Skevlo 259166694Skevlo /* Copy the sigframe out to the user's stack. */ 260166694Skevlo if (copyout(&frame, fp, sizeof(*fp)) != 0) { 261166694Skevlo /* Process has trashed its stack. Kill it. */ 262166694Skevlo CTR2(KTR_SIG, "sendsig: sigexit td=%p fp=%p", td, fp); 263166694Skevlo PROC_LOCK(p); 264129198Scognet sigexit(td, SIGILL); 265166694Skevlo } 266166694Skevlo 267166694Skevlo /* Translate the signal if appropriate. */ 268166694Skevlo if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize) 269166694Skevlo sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)]; 270166694Skevlo 271129198Scognet /* 272129198Scognet * Build context to run handler in. We invoke the handler 273129198Scognet * directly, only returning via the trampoline. Note the 274129198Scognet * trampoline version numbers are coordinated with machine- 275129198Scognet * dependent code in libc. 276129198Scognet */ 277129198Scognet 278129198Scognet tf->tf_r0 = sig; 279166694Skevlo tf->tf_r1 = (register_t)&fp->sf_si; 280166694Skevlo tf->tf_r2 = (register_t)&fp->sf_uc; 281129198Scognet 282129198Scognet /* the trampoline uses r5 as the uc address */ 283166694Skevlo tf->tf_r5 = (register_t)&fp->sf_uc; 284166694Skevlo tf->tf_pc = (register_t)catcher; 285166694Skevlo tf->tf_usr_sp = (register_t)fp; 286166694Skevlo tf->tf_usr_lr = (register_t)(PS_STRINGS - *(p->p_sysent->sv_szsigcode)); 287166697Skevlo 288166697Skevlo CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td, tf->tf_usr_lr, 289166697Skevlo tf->tf_usr_sp); 290166697Skevlo 291166694Skevlo PROC_LOCK(p); 292129198Scognet mtx_lock(&psp->ps_mtx); 293129198Scognet} 294129198Scognet 295129198Scognetstruct kva_md_info kmi; 296129198Scognet 297129198Scognet/* 298129198Scognet * arm32_vector_init: 299129198Scognet * 300129198Scognet * Initialize the vector page, and select whether or not to 301129198Scognet * relocate the vectors. 302129198Scognet * 303129198Scognet * NOTE: We expect the vector page to be mapped at its expected 304129198Scognet * destination. 305129198Scognet */ 306129198Scognet 307129198Scognetextern unsigned int page0[], page0_data[]; 308129198Scognetvoid 309129198Scognetarm_vector_init(vm_offset_t va, int which) 310129198Scognet{ 311129198Scognet unsigned int *vectors = (int *) va; 312129198Scognet unsigned int *vectors_data = vectors + (page0_data - page0); 313129198Scognet int vec; 314129198Scognet 315129198Scognet /* 316129198Scognet * Loop through the vectors we're taking over, and copy the 317129198Scognet * vector's insn and data word. 318129198Scognet */ 319129198Scognet for (vec = 0; vec < ARM_NVEC; vec++) { 320129198Scognet if ((which & (1 << vec)) == 0) { 321129198Scognet /* Don't want to take over this vector. */ 322129198Scognet continue; 323129198Scognet } 324129198Scognet vectors[vec] = page0[vec]; 325129198Scognet vectors_data[vec] = page0_data[vec]; 326129198Scognet } 327129198Scognet 328129198Scognet /* Now sync the vectors. */ 329129198Scognet cpu_icache_sync_range(va, (ARM_NVEC * 2) * sizeof(u_int)); 330129198Scognet 331129198Scognet vector_page = va; 332129198Scognet 333129198Scognet if (va == ARM_VECTORS_HIGH) { 334129198Scognet /* 335129198Scognet * Assume the MD caller knows what it's doing here, and 336129198Scognet * really does want the vector page relocated. 337129198Scognet * 338129198Scognet * Note: This has to be done here (and not just in 339129198Scognet * cpu_setup()) because the vector page needs to be 340129198Scognet * accessible *before* cpu_startup() is called. 341129198Scognet * Think ddb(9) ... 342129198Scognet * 343129198Scognet * NOTE: If the CPU control register is not readable, 344129198Scognet * this will totally fail! We'll just assume that 345129198Scognet * any system that has high vector support has a 346129198Scognet * readable CPU control register, for now. If we 347129198Scognet * ever encounter one that does not, we'll have to 348129198Scognet * rethink this. 349129198Scognet */ 350129198Scognet cpu_control(CPU_CONTROL_VECRELOC, CPU_CONTROL_VECRELOC); 351129198Scognet } 352129198Scognet} 353129198Scognet 354129198Scognetstatic void 355129198Scognetcpu_startup(void *dummy) 356129198Scognet{ 357129198Scognet struct pcb *pcb = thread0.td_pcb; 358239268Sgonzo#ifdef ARM_TP_ADDRESS 359142570Scognet#ifndef ARM_CACHE_LOCK_ENABLE 360142570Scognet vm_page_t m; 361142570Scognet#endif 362239268Sgonzo#endif 363137215Scognet 364158396Scognet cpu_setup(""); 365158590Sbenno identify_arm_cpu(); 366158590Sbenno 367158590Sbenno printf("real memory = %ju (%ju MB)\n", (uintmax_t)ptoa(physmem), 368158590Sbenno (uintmax_t)ptoa(physmem) / 1048576); 369158590Sbenno realmem = physmem; 370158590Sbenno 371158590Sbenno /* 372158590Sbenno * Display the RAM layout. 373158590Sbenno */ 374158590Sbenno if (bootverbose) { 375158590Sbenno int indx; 376158590Sbenno 377158590Sbenno printf("Physical memory chunk(s):\n"); 378158590Sbenno for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) { 379158590Sbenno vm_paddr_t size; 380158590Sbenno 381158590Sbenno size = phys_avail[indx + 1] - phys_avail[indx]; 382158590Sbenno printf("%#08jx - %#08jx, %ju bytes (%ju pages)\n", 383158590Sbenno (uintmax_t)phys_avail[indx], 384158590Sbenno (uintmax_t)phys_avail[indx + 1] - 1, 385158590Sbenno (uintmax_t)size, (uintmax_t)size / PAGE_SIZE); 386158590Sbenno } 387158590Sbenno } 388158590Sbenno 389129198Scognet vm_ksubmap_init(&kmi); 390158590Sbenno 391158590Sbenno printf("avail memory = %ju (%ju MB)\n", 392170170Sattilio (uintmax_t)ptoa(cnt.v_free_count), 393170170Sattilio (uintmax_t)ptoa(cnt.v_free_count) / 1048576); 394158590Sbenno 395129198Scognet bufinit(); 396129198Scognet vm_pager_bufferinit(); 397129198Scognet pcb->un_32.pcb32_und_sp = (u_int)thread0.td_kstack + 398129198Scognet USPACE_UNDEF_STACK_TOP; 399129198Scognet pcb->un_32.pcb32_sp = (u_int)thread0.td_kstack + 400129198Scognet USPACE_SVC_STACK_TOP; 401129198Scognet vector_page_setprot(VM_PROT_READ); 402129198Scognet pmap_set_pcb_pagedir(pmap_kernel(), pcb); 403152128Scognet pmap_postinit(); 404239268Sgonzo#ifdef ARM_TP_ADDRESS 405142570Scognet#ifdef ARM_CACHE_LOCK_ENABLE 406142570Scognet pmap_kenter_user(ARM_TP_ADDRESS, ARM_TP_ADDRESS); 407142570Scognet arm_lock_cache_line(ARM_TP_ADDRESS); 408142570Scognet#else 409142570Scognet m = vm_page_alloc(NULL, 0, VM_ALLOC_NOOBJ | VM_ALLOC_ZERO); 410142570Scognet pmap_kenter_user(ARM_TP_ADDRESS, VM_PAGE_TO_PHYS(m)); 411142570Scognet#endif 412226441Scognet *(uint32_t *)ARM_RAS_START = 0; 413226441Scognet *(uint32_t *)ARM_RAS_END = 0xffffffff; 414239268Sgonzo#endif 415129198Scognet} 416129198Scognet 417177253SrwatsonSYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL); 418129198Scognet 419192323Smarcel/* 420192323Smarcel * Flush the D-cache for non-DMA I/O so that the I-cache can 421192323Smarcel * be made coherent later. 422192323Smarcel */ 423192323Smarcelvoid 424192323Smarcelcpu_flush_dcache(void *ptr, size_t len) 425192323Smarcel{ 426192323Smarcel 427192323Smarcel cpu_dcache_wb_range((uintptr_t)ptr, len); 428192323Smarcel cpu_l2cache_wb_range((uintptr_t)ptr, len); 429192323Smarcel} 430192323Smarcel 431141237Snjl/* Get current clock frequency for the given cpu id. */ 432141237Snjlint 433141237Snjlcpu_est_clockrate(int cpu_id, uint64_t *rate) 434141237Snjl{ 435141237Snjl 436141237Snjl return (ENXIO); 437141237Snjl} 438141237Snjl 439129198Scognetvoid 440178471Sjeffcpu_idle(int busy) 441129198Scognet{ 442239268Sgonzo 443247195Smav CTR2(KTR_SPARE2, "cpu_idle(%d) at %d", 444247195Smav busy, curcpu); 445239268Sgonzo#ifndef NO_EVENTTIMERS 446239268Sgonzo if (!busy) { 447239268Sgonzo critical_enter(); 448239268Sgonzo cpu_idleclock(); 449239268Sgonzo } 450239268Sgonzo#endif 451247195Smav if (!sched_runnable()) 452247195Smav cpu_sleep(0); 453239268Sgonzo#ifndef NO_EVENTTIMERS 454239268Sgonzo if (!busy) { 455239268Sgonzo cpu_activeclock(); 456239268Sgonzo critical_exit(); 457239268Sgonzo } 458239268Sgonzo#endif 459247195Smav CTR2(KTR_SPARE2, "cpu_idle(%d) at %d done", 460247195Smav busy, curcpu); 461129198Scognet} 462129198Scognet 463129198Scognetint 464178471Sjeffcpu_idle_wakeup(int cpu) 465178471Sjeff{ 466178471Sjeff 467178471Sjeff return (0); 468178471Sjeff} 469178471Sjeff 470178471Sjeffint 471129198Scognetfill_regs(struct thread *td, struct reg *regs) 472129198Scognet{ 473129198Scognet struct trapframe *tf = td->td_frame; 474129198Scognet bcopy(&tf->tf_r0, regs->r, sizeof(regs->r)); 475129198Scognet regs->r_sp = tf->tf_usr_sp; 476129198Scognet regs->r_lr = tf->tf_usr_lr; 477129198Scognet regs->r_pc = tf->tf_pc; 478129198Scognet regs->r_cpsr = tf->tf_spsr; 479129198Scognet return (0); 480129198Scognet} 481129198Scognetint 482129198Scognetfill_fpregs(struct thread *td, struct fpreg *regs) 483129198Scognet{ 484129198Scognet bzero(regs, sizeof(*regs)); 485129198Scognet return (0); 486129198Scognet} 487129198Scognet 488129198Scognetint 489129198Scognetset_regs(struct thread *td, struct reg *regs) 490129198Scognet{ 491129198Scognet struct trapframe *tf = td->td_frame; 492129198Scognet 493137215Scognet bcopy(regs->r, &tf->tf_r0, sizeof(regs->r)); 494129198Scognet tf->tf_usr_sp = regs->r_sp; 495129198Scognet tf->tf_usr_lr = regs->r_lr; 496129198Scognet tf->tf_pc = regs->r_pc; 497129198Scognet tf->tf_spsr &= ~PSR_FLAGS; 498129198Scognet tf->tf_spsr |= regs->r_cpsr & PSR_FLAGS; 499129198Scognet return (0); 500129198Scognet} 501129198Scognet 502129198Scognetint 503129198Scognetset_fpregs(struct thread *td, struct fpreg *regs) 504129198Scognet{ 505129198Scognet return (0); 506129198Scognet} 507129198Scognet 508129198Scognetint 509129198Scognetfill_dbregs(struct thread *td, struct dbreg *regs) 510129198Scognet{ 511129198Scognet return (0); 512129198Scognet} 513129198Scognetint 514129198Scognetset_dbregs(struct thread *td, struct dbreg *regs) 515129198Scognet{ 516129198Scognet return (0); 517129198Scognet} 518129198Scognet 519140001Scognet 520140001Scognetstatic int 521140001Scognetptrace_read_int(struct thread *td, vm_offset_t addr, u_int32_t *v) 522140001Scognet{ 523140001Scognet struct iovec iov; 524140001Scognet struct uio uio; 525155922Sjhb 526155922Sjhb PROC_LOCK_ASSERT(td->td_proc, MA_NOTOWNED); 527140001Scognet iov.iov_base = (caddr_t) v; 528140001Scognet iov.iov_len = sizeof(u_int32_t); 529140001Scognet uio.uio_iov = &iov; 530140001Scognet uio.uio_iovcnt = 1; 531140001Scognet uio.uio_offset = (off_t)addr; 532140001Scognet uio.uio_resid = sizeof(u_int32_t); 533140001Scognet uio.uio_segflg = UIO_SYSSPACE; 534140001Scognet uio.uio_rw = UIO_READ; 535140001Scognet uio.uio_td = td; 536140001Scognet return proc_rwmem(td->td_proc, &uio); 537140001Scognet} 538140001Scognet 539140001Scognetstatic int 540140001Scognetptrace_write_int(struct thread *td, vm_offset_t addr, u_int32_t v) 541140001Scognet{ 542140001Scognet struct iovec iov; 543140001Scognet struct uio uio; 544155922Sjhb 545155922Sjhb PROC_LOCK_ASSERT(td->td_proc, MA_NOTOWNED); 546140001Scognet iov.iov_base = (caddr_t) &v; 547140001Scognet iov.iov_len = sizeof(u_int32_t); 548140001Scognet uio.uio_iov = &iov; 549140001Scognet uio.uio_iovcnt = 1; 550140001Scognet uio.uio_offset = (off_t)addr; 551140001Scognet uio.uio_resid = sizeof(u_int32_t); 552140001Scognet uio.uio_segflg = UIO_SYSSPACE; 553140001Scognet uio.uio_rw = UIO_WRITE; 554140001Scognet uio.uio_td = td; 555140001Scognet return proc_rwmem(td->td_proc, &uio); 556140001Scognet} 557140001Scognet 558129198Scognetint 559129198Scognetptrace_single_step(struct thread *td) 560129198Scognet{ 561155922Sjhb struct proc *p; 562140001Scognet int error; 563140001Scognet 564140001Scognet KASSERT(td->td_md.md_ptrace_instr == 0, 565140001Scognet ("Didn't clear single step")); 566155922Sjhb p = td->td_proc; 567155922Sjhb PROC_UNLOCK(p); 568236991Simp error = ptrace_read_int(td, td->td_frame->tf_pc + 4, 569140001Scognet &td->td_md.md_ptrace_instr); 570140001Scognet if (error) 571155922Sjhb goto out; 572140001Scognet error = ptrace_write_int(td, td->td_frame->tf_pc + 4, 573140001Scognet PTRACE_BREAKPOINT); 574140001Scognet if (error) 575140001Scognet td->td_md.md_ptrace_instr = 0; 576140001Scognet td->td_md.md_ptrace_addr = td->td_frame->tf_pc + 4; 577155922Sjhbout: 578155922Sjhb PROC_LOCK(p); 579140001Scognet return (error); 580129198Scognet} 581129198Scognet 582129198Scognetint 583132474Scognetptrace_clear_single_step(struct thread *td) 584132474Scognet{ 585155922Sjhb struct proc *p; 586155922Sjhb 587140001Scognet if (td->td_md.md_ptrace_instr) { 588155922Sjhb p = td->td_proc; 589155922Sjhb PROC_UNLOCK(p); 590140001Scognet ptrace_write_int(td, td->td_md.md_ptrace_addr, 591140001Scognet td->td_md.md_ptrace_instr); 592155922Sjhb PROC_LOCK(p); 593140001Scognet td->td_md.md_ptrace_instr = 0; 594140001Scognet } 595132474Scognet return (0); 596132474Scognet} 597132474Scognet 598132474Scognetint 599129198Scognetptrace_set_pc(struct thread *td, unsigned long addr) 600129198Scognet{ 601132474Scognet td->td_frame->tf_pc = addr; 602129198Scognet return (0); 603129198Scognet} 604129198Scognet 605129198Scognetvoid 606129198Scognetcpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size) 607129198Scognet{ 608129198Scognet} 609129198Scognet 610144637Sjhbvoid 611144637Sjhbspinlock_enter(void) 612144637Sjhb{ 613144637Sjhb struct thread *td; 614214835Sjhb register_t cspr; 615144637Sjhb 616144637Sjhb td = curthread; 617214835Sjhb if (td->td_md.md_spinlock_count == 0) { 618214835Sjhb cspr = disable_interrupts(I32_bit | F32_bit); 619214835Sjhb td->td_md.md_spinlock_count = 1; 620214835Sjhb td->td_md.md_saved_cspr = cspr; 621214835Sjhb } else 622214835Sjhb td->td_md.md_spinlock_count++; 623144637Sjhb critical_enter(); 624144637Sjhb} 625144637Sjhb 626144637Sjhbvoid 627144637Sjhbspinlock_exit(void) 628144637Sjhb{ 629144637Sjhb struct thread *td; 630214835Sjhb register_t cspr; 631144637Sjhb 632144637Sjhb td = curthread; 633144637Sjhb critical_exit(); 634214835Sjhb cspr = td->td_md.md_saved_cspr; 635144637Sjhb td->td_md.md_spinlock_count--; 636144637Sjhb if (td->td_md.md_spinlock_count == 0) 637214835Sjhb restore_interrupts(cspr); 638144637Sjhb} 639144637Sjhb 640129198Scognet/* 641129198Scognet * Clear registers on exec 642129198Scognet */ 643129198Scognetvoid 644205642Snwhitehornexec_setregs(struct thread *td, struct image_params *imgp, u_long stack) 645129198Scognet{ 646129198Scognet struct trapframe *tf = td->td_frame; 647129198Scognet 648129198Scognet memset(tf, 0, sizeof(*tf)); 649129198Scognet tf->tf_usr_sp = stack; 650205642Snwhitehorn tf->tf_usr_lr = imgp->entry_addr; 651129198Scognet tf->tf_svc_lr = 0x77777777; 652205642Snwhitehorn tf->tf_pc = imgp->entry_addr; 653129198Scognet tf->tf_spsr = PSR_USR32_MODE; 654129198Scognet} 655129198Scognet 656129198Scognet/* 657129198Scognet * Get machine context. 658129198Scognet */ 659129198Scognetint 660129198Scognetget_mcontext(struct thread *td, mcontext_t *mcp, int clear_ret) 661129198Scognet{ 662129198Scognet struct trapframe *tf = td->td_frame; 663129198Scognet __greg_t *gr = mcp->__gregs; 664129198Scognet 665137215Scognet if (clear_ret & GET_MC_CLEAR_RET) 666137215Scognet gr[_REG_R0] = 0; 667137215Scognet else 668137215Scognet gr[_REG_R0] = tf->tf_r0; 669129198Scognet gr[_REG_R1] = tf->tf_r1; 670129198Scognet gr[_REG_R2] = tf->tf_r2; 671129198Scognet gr[_REG_R3] = tf->tf_r3; 672129198Scognet gr[_REG_R4] = tf->tf_r4; 673129198Scognet gr[_REG_R5] = tf->tf_r5; 674129198Scognet gr[_REG_R6] = tf->tf_r6; 675129198Scognet gr[_REG_R7] = tf->tf_r7; 676129198Scognet gr[_REG_R8] = tf->tf_r8; 677129198Scognet gr[_REG_R9] = tf->tf_r9; 678129198Scognet gr[_REG_R10] = tf->tf_r10; 679129198Scognet gr[_REG_R11] = tf->tf_r11; 680129198Scognet gr[_REG_R12] = tf->tf_r12; 681129198Scognet gr[_REG_SP] = tf->tf_usr_sp; 682129198Scognet gr[_REG_LR] = tf->tf_usr_lr; 683129198Scognet gr[_REG_PC] = tf->tf_pc; 684129198Scognet gr[_REG_CPSR] = tf->tf_spsr; 685129198Scognet 686129198Scognet return (0); 687129198Scognet} 688129198Scognet 689129198Scognet/* 690129198Scognet * Set machine context. 691129198Scognet * 692129198Scognet * However, we don't set any but the user modifiable flags, and we won't 693129198Scognet * touch the cs selector. 694129198Scognet */ 695129198Scognetint 696129198Scognetset_mcontext(struct thread *td, const mcontext_t *mcp) 697129198Scognet{ 698137215Scognet struct trapframe *tf = td->td_frame; 699169764Scognet const __greg_t *gr = mcp->__gregs; 700137215Scognet 701137215Scognet tf->tf_r0 = gr[_REG_R0]; 702137215Scognet tf->tf_r1 = gr[_REG_R1]; 703137215Scognet tf->tf_r2 = gr[_REG_R2]; 704137215Scognet tf->tf_r3 = gr[_REG_R3]; 705137215Scognet tf->tf_r4 = gr[_REG_R4]; 706137215Scognet tf->tf_r5 = gr[_REG_R5]; 707137215Scognet tf->tf_r6 = gr[_REG_R6]; 708137215Scognet tf->tf_r7 = gr[_REG_R7]; 709137215Scognet tf->tf_r8 = gr[_REG_R8]; 710137215Scognet tf->tf_r9 = gr[_REG_R9]; 711137215Scognet tf->tf_r10 = gr[_REG_R10]; 712137215Scognet tf->tf_r11 = gr[_REG_R11]; 713137215Scognet tf->tf_r12 = gr[_REG_R12]; 714137215Scognet tf->tf_usr_sp = gr[_REG_SP]; 715137215Scognet tf->tf_usr_lr = gr[_REG_LR]; 716137215Scognet tf->tf_pc = gr[_REG_PC]; 717137215Scognet tf->tf_spsr = gr[_REG_CPSR]; 718137215Scognet 719129198Scognet return (0); 720129198Scognet} 721129198Scognet 722129198Scognet/* 723129198Scognet * MPSAFE 724129198Scognet */ 725129198Scognetint 726225617Skmacysys_sigreturn(td, uap) 727129198Scognet struct thread *td; 728129198Scognet struct sigreturn_args /* { 729152753Sru const struct __ucontext *sigcntxp; 730129198Scognet } */ *uap; 731129198Scognet{ 732135653Scognet struct sigframe sf; 733135653Scognet struct trapframe *tf; 734135653Scognet int spsr; 735135653Scognet 736135653Scognet if (uap == NULL) 737135653Scognet return (EFAULT); 738135653Scognet if (copyin(uap->sigcntxp, &sf, sizeof(sf))) 739135653Scognet return (EFAULT); 740135653Scognet /* 741135653Scognet * Make sure the processor mode has not been tampered with and 742135653Scognet * interrupts have not been disabled. 743135653Scognet */ 744135653Scognet spsr = sf.sf_uc.uc_mcontext.__gregs[_REG_CPSR]; 745135653Scognet if ((spsr & PSR_MODE) != PSR_USR32_MODE || 746135653Scognet (spsr & (I32_bit | F32_bit)) != 0) 747135653Scognet return (EINVAL); 748135653Scognet /* Restore register context. */ 749135653Scognet tf = td->td_frame; 750137215Scognet set_mcontext(td, &sf.sf_uc.uc_mcontext); 751135653Scognet 752135653Scognet /* Restore signal mask. */ 753198507Skib kern_sigprocmask(td, SIG_SETMASK, &sf.sf_uc.uc_sigmask, NULL, 0); 754135653Scognet 755135653Scognet return (EJUSTRETURN); 756129198Scognet} 757129198Scognet 758129198Scognet 759132054Scognet/* 760132054Scognet * Construct a PCB from a trapframe. This is called from kdb_trap() where 761132054Scognet * we want to start a backtrace from the function that caused us to enter 762132054Scognet * the debugger. We have the context in the trapframe, but base the trace 763132054Scognet * on the PCB. The PCB doesn't have to be perfect, as long as it contains 764132054Scognet * enough for a backtrace. 765132054Scognet */ 766132054Scognetvoid 767132054Scognetmakectx(struct trapframe *tf, struct pcb *pcb) 768132054Scognet{ 769132054Scognet pcb->un_32.pcb32_r8 = tf->tf_r8; 770132054Scognet pcb->un_32.pcb32_r9 = tf->tf_r9; 771132054Scognet pcb->un_32.pcb32_r10 = tf->tf_r10; 772132054Scognet pcb->un_32.pcb32_r11 = tf->tf_r11; 773132054Scognet pcb->un_32.pcb32_r12 = tf->tf_r12; 774132054Scognet pcb->un_32.pcb32_pc = tf->tf_pc; 775132054Scognet pcb->un_32.pcb32_lr = tf->tf_usr_lr; 776132054Scognet pcb->un_32.pcb32_sp = tf->tf_usr_sp; 777132054Scognet} 778177883Simp 779177883Simp/* 780237045Simp * Make a standard dump_avail array. Can't make the phys_avail 781237045Simp * since we need to do that after we call pmap_bootstrap, but this 782237045Simp * is needed before pmap_boostrap. 783237045Simp * 784237045Simp * ARM_USE_SMALL_ALLOC uses dump_avail, so it must be filled before 785237045Simp * calling pmap_bootstrap. 786237045Simp */ 787237045Simpvoid 788237118Simparm_dump_avail_init(vm_offset_t ramsize, size_t max) 789237045Simp{ 790237045Simp#ifdef LINUX_BOOT_ABI 791237045Simp /* 792237045Simp * Linux boot loader passes us the actual banks of memory, so use them 793237045Simp * to construct the dump_avail array. 794237045Simp */ 795237045Simp if (membanks > 0) 796237045Simp { 797237045Simp int i, j; 798237045Simp 799237045Simp if (max < (membanks + 1) * 2) 800237045Simp panic("dump_avail[%d] too small for %d banks\n", 801237045Simp max, membanks); 802237045Simp for (j = 0, i = 0; i < membanks; i++) { 803237045Simp dump_avail[j++] = round_page(memstart[i]); 804237045Simp dump_avail[j++] = trunc_page(memstart[i] + memsize[i]); 805237045Simp } 806237045Simp dump_avail[j++] = 0; 807237045Simp dump_avail[j++] = 0; 808237045Simp return; 809237045Simp } 810237045Simp#endif 811237045Simp if (max < 4) 812237045Simp panic("dump_avail too small\n"); 813237045Simp 814237045Simp dump_avail[0] = round_page(PHYSADDR); 815237118Simp dump_avail[1] = trunc_page(PHYSADDR + ramsize); 816237045Simp dump_avail[2] = 0; 817237045Simp dump_avail[3] = 0; 818237045Simp} 819237045Simp 820237045Simp/* 821177883Simp * Fake up a boot descriptor table 822177883Simp */ 823177883Simpvm_offset_t 824237040Simpfake_preload_metadata(struct arm_boot_params *abp __unused) 825177883Simp{ 826177883Simp#ifdef DDB 827177883Simp vm_offset_t zstart = 0, zend = 0; 828177883Simp#endif 829177883Simp vm_offset_t lastaddr; 830177883Simp int i = 0; 831177883Simp static uint32_t fake_preload[35]; 832177883Simp 833177883Simp fake_preload[i++] = MODINFO_NAME; 834235831Sfabient fake_preload[i++] = strlen("kernel") + 1; 835235831Sfabient strcpy((char*)&fake_preload[i++], "kernel"); 836235831Sfabient i += 1; 837177883Simp fake_preload[i++] = MODINFO_TYPE; 838177883Simp fake_preload[i++] = strlen("elf kernel") + 1; 839177883Simp strcpy((char*)&fake_preload[i++], "elf kernel"); 840177883Simp i += 2; 841177883Simp fake_preload[i++] = MODINFO_ADDR; 842177883Simp fake_preload[i++] = sizeof(vm_offset_t); 843177883Simp fake_preload[i++] = KERNVIRTADDR; 844177883Simp fake_preload[i++] = MODINFO_SIZE; 845177883Simp fake_preload[i++] = sizeof(uint32_t); 846177883Simp fake_preload[i++] = (uint32_t)&end - KERNVIRTADDR; 847177883Simp#ifdef DDB 848177883Simp if (*(uint32_t *)KERNVIRTADDR == MAGIC_TRAMP_NUMBER) { 849177883Simp fake_preload[i++] = MODINFO_METADATA|MODINFOMD_SSYM; 850177883Simp fake_preload[i++] = sizeof(vm_offset_t); 851177883Simp fake_preload[i++] = *(uint32_t *)(KERNVIRTADDR + 4); 852177883Simp fake_preload[i++] = MODINFO_METADATA|MODINFOMD_ESYM; 853177883Simp fake_preload[i++] = sizeof(vm_offset_t); 854177883Simp fake_preload[i++] = *(uint32_t *)(KERNVIRTADDR + 8); 855177883Simp lastaddr = *(uint32_t *)(KERNVIRTADDR + 8); 856177883Simp zend = lastaddr; 857177883Simp zstart = *(uint32_t *)(KERNVIRTADDR + 4); 858177883Simp ksym_start = zstart; 859177883Simp ksym_end = zend; 860177883Simp } else 861177883Simp#endif 862177883Simp lastaddr = (vm_offset_t)&end; 863177883Simp fake_preload[i++] = 0; 864177883Simp fake_preload[i] = 0; 865177883Simp preload_metadata = (void *)fake_preload; 866177883Simp 867177883Simp return (lastaddr); 868177883Simp} 869236828Sandrew 870239268Sgonzovoid 871239268Sgonzopcpu0_init(void) 872239268Sgonzo{ 873239698Sgonzo#if ARM_ARCH_6 || ARM_ARCH_7A || defined(CPU_MV_PJ4B) 874239268Sgonzo set_pcpu(pcpup); 875239268Sgonzo#endif 876239268Sgonzo pcpu_init(pcpup, 0, sizeof(struct pcpu)); 877239268Sgonzo PCPU_SET(curthread, &thread0); 878254461Sandrew#ifdef VFP 879239268Sgonzo PCPU_SET(cpu, 0); 880239268Sgonzo#endif 881239268Sgonzo} 882239268Sgonzo 883237044Simp#if defined(LINUX_BOOT_ABI) 884237042Simpvm_offset_t 885237044Simplinux_parse_boot_param(struct arm_boot_params *abp) 886237042Simp{ 887237044Simp struct arm_lbabi_tag *walker; 888245079Sgonzo uint32_t revision; 889245079Sgonzo uint64_t serial; 890237044Simp 891237044Simp /* 892237044Simp * Linux boot ABI: r0 = 0, r1 is the board type (!= 0) and r2 893237044Simp * is atags or dtb pointer. If all of these aren't satisfied, 894237044Simp * then punt. 895237044Simp */ 896237044Simp if (!(abp->abp_r0 == 0 && abp->abp_r1 != 0 && abp->abp_r2 != 0)) 897237044Simp return 0; 898237044Simp 899237044Simp board_id = abp->abp_r1; 900237044Simp walker = (struct arm_lbabi_tag *) 901237044Simp (abp->abp_r2 + KERNVIRTADDR - KERNPHYSADDR); 902237044Simp 903237044Simp /* xxx - Need to also look for binary device tree */ 904237044Simp if (ATAG_TAG(walker) != ATAG_CORE) 905237044Simp return 0; 906237044Simp 907237044Simp atag_list = walker; 908237044Simp while (ATAG_TAG(walker) != ATAG_NONE) { 909237044Simp switch (ATAG_TAG(walker)) { 910237044Simp case ATAG_CORE: 911237044Simp break; 912237044Simp case ATAG_MEM: 913237044Simp if (membanks < LBABI_MAX_BANKS) { 914237044Simp memstart[membanks] = walker->u.tag_mem.start; 915237044Simp memsize[membanks] = walker->u.tag_mem.size; 916237044Simp } 917237044Simp membanks++; 918237044Simp break; 919237044Simp case ATAG_INITRD2: 920237044Simp break; 921237044Simp case ATAG_SERIAL: 922237044Simp serial = walker->u.tag_sn.low | 923237044Simp ((uint64_t)walker->u.tag_sn.high << 32); 924245079Sgonzo board_set_serial(serial); 925237044Simp break; 926237044Simp case ATAG_REVISION: 927237044Simp revision = walker->u.tag_rev.rev; 928245079Sgonzo board_set_revision(revision); 929237044Simp break; 930237044Simp case ATAG_CMDLINE: 931237044Simp /* XXX open question: Parse this for boothowto? */ 932237044Simp bcopy(walker->u.tag_cmd.command, linux_command_line, 933237044Simp ATAG_SIZE(walker)); 934237044Simp break; 935237044Simp default: 936237044Simp break; 937237044Simp } 938237044Simp walker = ATAG_NEXT(walker); 939237044Simp } 940237044Simp 941237044Simp /* Save a copy for later */ 942237044Simp bcopy(atag_list, atags, 943237044Simp (char *)walker - (char *)atag_list + ATAG_SIZE(walker)); 944237044Simp 945237044Simp return fake_preload_metadata(abp); 946237044Simp} 947237044Simp#endif 948237044Simp 949237042Simp#if defined(FREEBSD_BOOT_LOADER) 950237044Simpvm_offset_t 951237044Simpfreebsd_parse_boot_param(struct arm_boot_params *abp) 952237044Simp{ 953237044Simp vm_offset_t lastaddr = 0; 954237042Simp void *mdp; 955237042Simp void *kmdp; 956237042Simp 957237042Simp /* 958237042Simp * Mask metadata pointer: it is supposed to be on page boundary. If 959237042Simp * the first argument (mdp) doesn't point to a valid address the 960237042Simp * bootloader must have passed us something else than the metadata 961237044Simp * ptr, so we give up. Also give up if we cannot find metadta section 962237044Simp * the loader creates that we get all this data out of. 963237042Simp */ 964237042Simp 965237044Simp if ((mdp = (void *)(abp->abp_r0 & ~PAGE_MASK)) == NULL) 966237044Simp return 0; 967237044Simp preload_metadata = mdp; 968237044Simp kmdp = preload_search_by_type("elf kernel"); 969237044Simp if (kmdp == NULL) 970237044Simp return 0; 971237044Simp 972237044Simp boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 973237044Simp kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 974237044Simp lastaddr = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); 975237042Simp#ifdef DDB 976237044Simp ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); 977237044Simp ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); 978237042Simp#endif 979237044Simp preload_addr_relocate = KERNVIRTADDR - KERNPHYSADDR; 980237044Simp return lastaddr; 981237044Simp} 982237044Simp#endif 983237042Simp 984237044Simpvm_offset_t 985237044Simpdefault_parse_boot_param(struct arm_boot_params *abp) 986237044Simp{ 987237044Simp vm_offset_t lastaddr; 988237044Simp 989237044Simp#if defined(LINUX_BOOT_ABI) 990237044Simp if ((lastaddr = linux_parse_boot_param(abp)) != 0) 991237044Simp return lastaddr; 992237042Simp#endif 993237044Simp#if defined(FREEBSD_BOOT_LOADER) 994237044Simp if ((lastaddr = freebsd_parse_boot_param(abp)) != 0) 995237044Simp return lastaddr; 996237044Simp#endif 997237044Simp /* Fall back to hardcoded metadata. */ 998237044Simp lastaddr = fake_preload_metadata(abp); 999237044Simp 1000237042Simp return lastaddr; 1001237042Simp} 1002237042Simp 1003236828Sandrew/* 1004237040Simp * Stub version of the boot parameter parsing routine. We are 1005237040Simp * called early in initarm, before even VM has been initialized. 1006237040Simp * This routine needs to preserve any data that the boot loader 1007237040Simp * has passed in before the kernel starts to grow past the end 1008237040Simp * of the BSS, traditionally the place boot-loaders put this data. 1009237040Simp * 1010237040Simp * Since this is called so early, things that depend on the vm system 1011237040Simp * being setup (including access to some SoC's serial ports), about 1012237040Simp * all that can be done in this routine is to copy the arguments. 1013237040Simp * 1014237040Simp * This is the default boot parameter parsing routine. Individual 1015237040Simp * kernels/boards can override this weak function with one of their 1016237040Simp * own. We just fake metadata... 1017237040Simp */ 1018237042Simp__weak_reference(default_parse_boot_param, parse_boot_param); 1019237040Simp 1020237040Simp/* 1021236828Sandrew * Initialize proc0 1022236828Sandrew */ 1023236828Sandrewvoid 1024236828Sandrewinit_proc0(vm_offset_t kstack) 1025236828Sandrew{ 1026236828Sandrew proc_linkup0(&proc0, &thread0); 1027236828Sandrew thread0.td_kstack = kstack; 1028236828Sandrew thread0.td_pcb = (struct pcb *) 1029236828Sandrew (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1; 1030236828Sandrew thread0.td_pcb->pcb_flags = 0; 1031236828Sandrew thread0.td_frame = &proc0_tf; 1032236828Sandrew pcpup->pc_curpcb = thread0.td_pcb; 1033236828Sandrew} 1034240802Sandrew 1035240802Sandrewvoid 1036240802Sandrewset_stackptrs(int cpu) 1037240802Sandrew{ 1038240802Sandrew 1039240802Sandrew set_stackptr(PSR_IRQ32_MODE, 1040240802Sandrew irqstack.pv_va + ((IRQ_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1041240802Sandrew set_stackptr(PSR_ABT32_MODE, 1042240802Sandrew abtstack.pv_va + ((ABT_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1043240802Sandrew set_stackptr(PSR_UND32_MODE, 1044240802Sandrew undstack.pv_va + ((UND_STACK_SIZE * PAGE_SIZE) * (cpu + 1))); 1045240802Sandrew} 1046240802Sandrew 1047242531Sandrew#ifdef FDT 1048242531Sandrewstatic char * 1049242531Sandrewkenv_next(char *cp) 1050242531Sandrew{ 1051242531Sandrew 1052242531Sandrew if (cp != NULL) { 1053242531Sandrew while (*cp != 0) 1054242531Sandrew cp++; 1055242531Sandrew cp++; 1056242531Sandrew if (*cp == 0) 1057242531Sandrew cp = NULL; 1058242531Sandrew } 1059242531Sandrew return (cp); 1060242531Sandrew} 1061242531Sandrew 1062242531Sandrewstatic void 1063242531Sandrewprint_kenv(void) 1064242531Sandrew{ 1065242531Sandrew int len; 1066242531Sandrew char *cp; 1067242531Sandrew 1068242531Sandrew debugf("loader passed (static) kenv:\n"); 1069242531Sandrew if (kern_envp == NULL) { 1070242531Sandrew debugf(" no env, null ptr\n"); 1071242531Sandrew return; 1072242531Sandrew } 1073242531Sandrew debugf(" kern_envp = 0x%08x\n", (uint32_t)kern_envp); 1074242531Sandrew 1075242531Sandrew len = 0; 1076242531Sandrew for (cp = kern_envp; cp != NULL; cp = kenv_next(cp)) 1077242531Sandrew debugf(" %x %s\n", (uint32_t)cp, cp); 1078242531Sandrew} 1079242531Sandrew 1080242531Sandrewstatic void 1081242531Sandrewphysmap_init(struct mem_region *availmem_regions, int availmem_regions_sz) 1082242531Sandrew{ 1083242531Sandrew int i, j, cnt; 1084242531Sandrew vm_offset_t phys_kernelend, kernload; 1085242531Sandrew uint32_t s, e, sz; 1086242531Sandrew struct mem_region *mp, *mp1; 1087242531Sandrew 1088242531Sandrew phys_kernelend = KERNPHYSADDR + (virtual_avail - KERNVIRTADDR); 1089242531Sandrew kernload = KERNPHYSADDR; 1090242531Sandrew 1091242531Sandrew /* 1092242531Sandrew * Remove kernel physical address range from avail 1093242531Sandrew * regions list. Page align all regions. 1094242531Sandrew * Non-page aligned memory isn't very interesting to us. 1095242531Sandrew * Also, sort the entries for ascending addresses. 1096242531Sandrew */ 1097242531Sandrew sz = 0; 1098242531Sandrew cnt = availmem_regions_sz; 1099242531Sandrew debugf("processing avail regions:\n"); 1100242531Sandrew for (mp = availmem_regions; mp->mr_size; mp++) { 1101242531Sandrew s = mp->mr_start; 1102242531Sandrew e = mp->mr_start + mp->mr_size; 1103242531Sandrew debugf(" %08x-%08x -> ", s, e); 1104242531Sandrew /* Check whether this region holds all of the kernel. */ 1105242531Sandrew if (s < kernload && e > phys_kernelend) { 1106242531Sandrew availmem_regions[cnt].mr_start = phys_kernelend; 1107242531Sandrew availmem_regions[cnt++].mr_size = e - phys_kernelend; 1108242531Sandrew e = kernload; 1109242531Sandrew } 1110242531Sandrew /* Look whether this regions starts within the kernel. */ 1111242531Sandrew if (s >= kernload && s < phys_kernelend) { 1112242531Sandrew if (e <= phys_kernelend) 1113242531Sandrew goto empty; 1114242531Sandrew s = phys_kernelend; 1115242531Sandrew } 1116242531Sandrew /* Now look whether this region ends within the kernel. */ 1117242531Sandrew if (e > kernload && e <= phys_kernelend) { 1118242531Sandrew if (s >= kernload) { 1119242531Sandrew goto empty; 1120242531Sandrew } 1121242531Sandrew e = kernload; 1122242531Sandrew } 1123242531Sandrew /* Now page align the start and size of the region. */ 1124242531Sandrew s = round_page(s); 1125242531Sandrew e = trunc_page(e); 1126242531Sandrew if (e < s) 1127242531Sandrew e = s; 1128242531Sandrew sz = e - s; 1129242531Sandrew debugf("%08x-%08x = %x\n", s, e, sz); 1130242531Sandrew 1131242531Sandrew /* Check whether some memory is left here. */ 1132242531Sandrew if (sz == 0) { 1133242531Sandrew empty: 1134242531Sandrew printf("skipping\n"); 1135242531Sandrew bcopy(mp + 1, mp, 1136242531Sandrew (cnt - (mp - availmem_regions)) * sizeof(*mp)); 1137242531Sandrew cnt--; 1138242531Sandrew mp--; 1139242531Sandrew continue; 1140242531Sandrew } 1141242531Sandrew 1142242531Sandrew /* Do an insertion sort. */ 1143242531Sandrew for (mp1 = availmem_regions; mp1 < mp; mp1++) 1144242531Sandrew if (s < mp1->mr_start) 1145242531Sandrew break; 1146242531Sandrew if (mp1 < mp) { 1147242531Sandrew bcopy(mp1, mp1 + 1, (char *)mp - (char *)mp1); 1148242531Sandrew mp1->mr_start = s; 1149242531Sandrew mp1->mr_size = sz; 1150242531Sandrew } else { 1151242531Sandrew mp->mr_start = s; 1152242531Sandrew mp->mr_size = sz; 1153242531Sandrew } 1154242531Sandrew } 1155242531Sandrew availmem_regions_sz = cnt; 1156242531Sandrew 1157242531Sandrew /* Fill in phys_avail table, based on availmem_regions */ 1158242531Sandrew debugf("fill in phys_avail:\n"); 1159242531Sandrew for (i = 0, j = 0; i < availmem_regions_sz; i++, j += 2) { 1160242531Sandrew 1161242531Sandrew debugf(" region: 0x%08x - 0x%08x (0x%08x)\n", 1162242531Sandrew availmem_regions[i].mr_start, 1163242531Sandrew availmem_regions[i].mr_start + availmem_regions[i].mr_size, 1164242531Sandrew availmem_regions[i].mr_size); 1165242531Sandrew 1166242531Sandrew /* 1167242531Sandrew * We should not map the page at PA 0x0000000, the VM can't 1168242531Sandrew * handle it, as pmap_extract() == 0 means failure. 1169242531Sandrew */ 1170242531Sandrew if (availmem_regions[i].mr_start > 0 || 1171242531Sandrew availmem_regions[i].mr_size > PAGE_SIZE) { 1172242531Sandrew phys_avail[j] = availmem_regions[i].mr_start; 1173242531Sandrew if (phys_avail[j] == 0) 1174242531Sandrew phys_avail[j] += PAGE_SIZE; 1175242531Sandrew phys_avail[j + 1] = availmem_regions[i].mr_start + 1176242531Sandrew availmem_regions[i].mr_size; 1177242531Sandrew } else 1178242531Sandrew j -= 2; 1179242531Sandrew } 1180242531Sandrew phys_avail[j] = 0; 1181242531Sandrew phys_avail[j + 1] = 0; 1182242531Sandrew} 1183242531Sandrew 1184242531Sandrewvoid * 1185242531Sandrewinitarm(struct arm_boot_params *abp) 1186242531Sandrew{ 1187243691Sgonzo struct mem_region memory_regions[FDT_MEM_REGIONS]; 1188242531Sandrew struct mem_region availmem_regions[FDT_MEM_REGIONS]; 1189243691Sgonzo struct mem_region reserved_regions[FDT_MEM_REGIONS]; 1190242531Sandrew struct pv_addr kernel_l1pt; 1191242531Sandrew struct pv_addr dpcpu; 1192242531Sandrew vm_offset_t dtbp, freemempos, l2_start, lastaddr; 1193242531Sandrew uint32_t memsize, l2size; 1194242531Sandrew char *env; 1195242531Sandrew void *kmdp; 1196242531Sandrew u_int l1pagetable; 1197242531Sandrew int i = 0, j = 0, err_devmap = 0; 1198243691Sgonzo int memory_regions_sz; 1199242531Sandrew int availmem_regions_sz; 1200243691Sgonzo int reserved_regions_sz; 1201243691Sgonzo vm_offset_t start, end; 1202243691Sgonzo vm_offset_t rstart, rend; 1203243691Sgonzo int curr; 1204242531Sandrew 1205242531Sandrew lastaddr = parse_boot_param(abp); 1206242531Sandrew memsize = 0; 1207242531Sandrew set_cpufuncs(); 1208242531Sandrew 1209242531Sandrew /* 1210242531Sandrew * Find the dtb passed in by the boot loader. 1211242531Sandrew */ 1212242531Sandrew kmdp = preload_search_by_type("elf kernel"); 1213242531Sandrew if (kmdp != NULL) 1214242531Sandrew dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t); 1215242531Sandrew else 1216242531Sandrew dtbp = (vm_offset_t)NULL; 1217242531Sandrew 1218242531Sandrew#if defined(FDT_DTB_STATIC) 1219242531Sandrew /* 1220242531Sandrew * In case the device tree blob was not retrieved (from metadata) try 1221242531Sandrew * to use the statically embedded one. 1222242531Sandrew */ 1223242531Sandrew if (dtbp == (vm_offset_t)NULL) 1224242531Sandrew dtbp = (vm_offset_t)&fdt_static_dtb; 1225242531Sandrew#endif 1226242531Sandrew 1227242531Sandrew if (OF_install(OFW_FDT, 0) == FALSE) 1228242531Sandrew while (1); 1229242531Sandrew 1230242531Sandrew if (OF_init((void *)dtbp) != 0) 1231242531Sandrew while (1); 1232242531Sandrew 1233242531Sandrew /* Grab physical memory regions information from device tree. */ 1234243691Sgonzo if (fdt_get_mem_regions(memory_regions, &memory_regions_sz, 1235242531Sandrew &memsize) != 0) 1236242531Sandrew while(1); 1237242531Sandrew 1238243691Sgonzo /* Grab physical memory regions information from device tree. */ 1239243691Sgonzo if (fdt_get_reserved_regions(reserved_regions, &reserved_regions_sz) != 0) 1240243691Sgonzo reserved_regions_sz = 0; 1241243691Sgonzo 1242243691Sgonzo /* 1243243691Sgonzo * Now exclude all the reserved regions 1244243691Sgonzo */ 1245243691Sgonzo curr = 0; 1246243691Sgonzo for (i = 0; i < memory_regions_sz; i++) { 1247243691Sgonzo start = memory_regions[i].mr_start; 1248243691Sgonzo end = start + memory_regions[i].mr_size; 1249243691Sgonzo for (j = 0; j < reserved_regions_sz; j++) { 1250243691Sgonzo rstart = reserved_regions[j].mr_start; 1251243691Sgonzo rend = rstart + reserved_regions[j].mr_size; 1252243691Sgonzo /* 1253243691Sgonzo * Restricted region is before available 1254243691Sgonzo * Skip restricted region 1255243691Sgonzo */ 1256243691Sgonzo if (rend <= start) 1257243691Sgonzo continue; 1258243691Sgonzo /* 1259243691Sgonzo * Restricted region is behind available 1260243691Sgonzo * No further processing required 1261243691Sgonzo */ 1262243691Sgonzo if (rstart >= end) 1263243691Sgonzo break; 1264243691Sgonzo /* 1265243691Sgonzo * Restricted region includes memory region 1266255091Srpaulo * skip available region 1267243691Sgonzo */ 1268243691Sgonzo if ((start >= rstart) && (rend >= end)) { 1269243691Sgonzo start = rend; 1270243691Sgonzo end = rend; 1271243691Sgonzo break; 1272243691Sgonzo } 1273243691Sgonzo /* 1274243691Sgonzo * Memory region includes restricted region 1275243691Sgonzo */ 1276243691Sgonzo if ((rstart > start) && (end > rend)) { 1277243691Sgonzo availmem_regions[curr].mr_start = start; 1278243691Sgonzo availmem_regions[curr++].mr_size = rstart - start; 1279243691Sgonzo start = rend; 1280243691Sgonzo break; 1281243691Sgonzo } 1282243691Sgonzo /* 1283243691Sgonzo * Memory region partially overlaps with restricted 1284243691Sgonzo */ 1285243691Sgonzo if ((rstart >= start) && (rstart <= end)) { 1286243691Sgonzo end = rstart; 1287243691Sgonzo } 1288243691Sgonzo else if ((rend >= start) && (rend <= end)) { 1289243691Sgonzo start = rend; 1290243691Sgonzo } 1291243691Sgonzo } 1292243691Sgonzo 1293243691Sgonzo if (end > start) { 1294243691Sgonzo availmem_regions[curr].mr_start = start; 1295243691Sgonzo availmem_regions[curr++].mr_size = end - start; 1296243691Sgonzo } 1297243691Sgonzo } 1298243691Sgonzo 1299243691Sgonzo availmem_regions_sz = curr; 1300243691Sgonzo 1301242531Sandrew /* Platform-specific initialisation */ 1302246926Salc vm_max_kernel_address = initarm_lastaddr(); 1303242531Sandrew 1304242531Sandrew pcpu0_init(); 1305242531Sandrew 1306242700Simp /* Do basic tuning, hz etc */ 1307242700Simp init_param1(); 1308242700Simp 1309242531Sandrew /* Calculate number of L2 tables needed for mapping vm_page_array */ 1310242531Sandrew l2size = (memsize / PAGE_SIZE) * sizeof(struct vm_page); 1311242531Sandrew l2size = (l2size >> L1_S_SHIFT) + 1; 1312242531Sandrew 1313242531Sandrew /* 1314242531Sandrew * Add one table for end of kernel map, one for stacks, msgbuf and 1315242531Sandrew * L1 and L2 tables map and one for vectors map. 1316242531Sandrew */ 1317242531Sandrew l2size += 3; 1318242531Sandrew 1319242531Sandrew /* Make it divisible by 4 */ 1320242531Sandrew l2size = (l2size + 3) & ~3; 1321242531Sandrew 1322242531Sandrew freemempos = (lastaddr + PAGE_MASK) & ~PAGE_MASK; 1323242531Sandrew 1324242531Sandrew /* Define a macro to simplify memory allocation */ 1325242700Simp#define valloc_pages(var, np) \ 1326242700Simp alloc_pages((var).pv_va, (np)); \ 1327242531Sandrew (var).pv_pa = (var).pv_va + (KERNPHYSADDR - KERNVIRTADDR); 1328242531Sandrew 1329242700Simp#define alloc_pages(var, np) \ 1330242700Simp (var) = freemempos; \ 1331242700Simp freemempos += (np * PAGE_SIZE); \ 1332242531Sandrew memset((char *)(var), 0, ((np) * PAGE_SIZE)); 1333242531Sandrew 1334242531Sandrew while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0) 1335242531Sandrew freemempos += PAGE_SIZE; 1336242531Sandrew valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 1337242531Sandrew 1338242531Sandrew for (i = 0; i < l2size; ++i) { 1339242531Sandrew if (!(i % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) { 1340242531Sandrew valloc_pages(kernel_pt_table[i], 1341242531Sandrew L2_TABLE_SIZE / PAGE_SIZE); 1342242531Sandrew j = i; 1343242531Sandrew } else { 1344242531Sandrew kernel_pt_table[i].pv_va = kernel_pt_table[j].pv_va + 1345242531Sandrew L2_TABLE_SIZE_REAL * (i - j); 1346242531Sandrew kernel_pt_table[i].pv_pa = 1347242531Sandrew kernel_pt_table[i].pv_va - KERNVIRTADDR + 1348242531Sandrew KERNPHYSADDR; 1349242531Sandrew 1350242531Sandrew } 1351242531Sandrew } 1352242531Sandrew /* 1353242531Sandrew * Allocate a page for the system page mapped to 0x00000000 1354242531Sandrew * or 0xffff0000. This page will just contain the system vectors 1355242531Sandrew * and can be shared by all processes. 1356242531Sandrew */ 1357242531Sandrew valloc_pages(systempage, 1); 1358242531Sandrew 1359242531Sandrew /* Allocate dynamic per-cpu area. */ 1360242531Sandrew valloc_pages(dpcpu, DPCPU_SIZE / PAGE_SIZE); 1361242531Sandrew dpcpu_init((void *)dpcpu.pv_va, 0); 1362242531Sandrew 1363242531Sandrew /* Allocate stacks for all modes */ 1364242746Simp valloc_pages(irqstack, IRQ_STACK_SIZE * MAXCPU); 1365242746Simp valloc_pages(abtstack, ABT_STACK_SIZE * MAXCPU); 1366242746Simp valloc_pages(undstack, UND_STACK_SIZE * MAXCPU); 1367242746Simp valloc_pages(kernelstack, KSTACK_PAGES * MAXCPU); 1368242531Sandrew valloc_pages(msgbufpv, round_page(msgbufsize) / PAGE_SIZE); 1369242531Sandrew 1370242531Sandrew /* 1371242531Sandrew * Now we start construction of the L1 page table 1372242531Sandrew * We start by mapping the L2 page tables into the L1. 1373242531Sandrew * This means that we can replace L1 mappings later on if necessary 1374242531Sandrew */ 1375242531Sandrew l1pagetable = kernel_l1pt.pv_va; 1376242531Sandrew 1377242531Sandrew /* 1378242531Sandrew * Try to map as much as possible of kernel text and data using 1379242531Sandrew * 1MB section mapping and for the rest of initial kernel address 1380242531Sandrew * space use L2 coarse tables. 1381242531Sandrew * 1382242531Sandrew * Link L2 tables for mapping remainder of kernel (modulo 1MB) 1383242531Sandrew * and kernel structures 1384242531Sandrew */ 1385242531Sandrew l2_start = lastaddr & ~(L1_S_OFFSET); 1386242531Sandrew for (i = 0 ; i < l2size - 1; i++) 1387242531Sandrew pmap_link_l2pt(l1pagetable, l2_start + i * L1_S_SIZE, 1388242531Sandrew &kernel_pt_table[i]); 1389242531Sandrew 1390242531Sandrew pmap_curmaxkvaddr = l2_start + (l2size - 1) * L1_S_SIZE; 1391242531Sandrew 1392242531Sandrew /* Map kernel code and data */ 1393242531Sandrew pmap_map_chunk(l1pagetable, KERNVIRTADDR, KERNPHYSADDR, 1394242531Sandrew (((uint32_t)(lastaddr) - KERNVIRTADDR) + PAGE_MASK) & ~PAGE_MASK, 1395242531Sandrew VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 1396242531Sandrew 1397242531Sandrew 1398242531Sandrew /* Map L1 directory and allocated L2 page tables */ 1399242531Sandrew pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 1400242531Sandrew L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 1401242531Sandrew 1402242531Sandrew pmap_map_chunk(l1pagetable, kernel_pt_table[0].pv_va, 1403242531Sandrew kernel_pt_table[0].pv_pa, 1404242531Sandrew L2_TABLE_SIZE_REAL * l2size, 1405242531Sandrew VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 1406242531Sandrew 1407242531Sandrew /* Map allocated DPCPU, stacks and msgbuf */ 1408242531Sandrew pmap_map_chunk(l1pagetable, dpcpu.pv_va, dpcpu.pv_pa, 1409242531Sandrew freemempos - dpcpu.pv_va, 1410242531Sandrew VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 1411242531Sandrew 1412242531Sandrew /* Link and map the vector page */ 1413242531Sandrew pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH, 1414242531Sandrew &kernel_pt_table[l2size - 1]); 1415242531Sandrew pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 1416242531Sandrew VM_PROT_READ|VM_PROT_WRITE|VM_PROT_EXECUTE, PTE_CACHE); 1417242531Sandrew 1418242531Sandrew /* Map pmap_devmap[] entries */ 1419242531Sandrew err_devmap = platform_devmap_init(); 1420242531Sandrew pmap_devmap_bootstrap(l1pagetable, pmap_devmap_bootstrap_table); 1421242531Sandrew 1422242700Simp cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL * 2)) | DOMAIN_CLIENT); 1423242531Sandrew pmap_pa = kernel_l1pt.pv_pa; 1424242531Sandrew setttb(kernel_l1pt.pv_pa); 1425242531Sandrew cpu_tlb_flushID(); 1426242531Sandrew cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL * 2)); 1427242531Sandrew 1428242531Sandrew /* 1429242531Sandrew * Only after the SOC registers block is mapped we can perform device 1430242531Sandrew * tree fixups, as they may attempt to read parameters from hardware. 1431242531Sandrew */ 1432242531Sandrew OF_interpret("perform-fixup", 0); 1433242531Sandrew 1434242531Sandrew initarm_gpio_init(); 1435242531Sandrew 1436242531Sandrew cninit(); 1437242531Sandrew 1438242531Sandrew physmem = memsize / PAGE_SIZE; 1439242531Sandrew 1440242531Sandrew debugf("initarm: console initialized\n"); 1441242531Sandrew debugf(" arg1 kmdp = 0x%08x\n", (uint32_t)kmdp); 1442242531Sandrew debugf(" boothowto = 0x%08x\n", boothowto); 1443242531Sandrew debugf(" dtbp = 0x%08x\n", (uint32_t)dtbp); 1444242531Sandrew print_kenv(); 1445242531Sandrew 1446242531Sandrew env = getenv("kernelname"); 1447242531Sandrew if (env != NULL) 1448242531Sandrew strlcpy(kernelname, env, sizeof(kernelname)); 1449242531Sandrew 1450242531Sandrew if (err_devmap != 0) 1451242531Sandrew printf("WARNING: could not fully configure devmap, error=%d\n", 1452242531Sandrew err_devmap); 1453242531Sandrew 1454242531Sandrew initarm_late_init(); 1455242531Sandrew 1456242531Sandrew /* 1457242531Sandrew * Pages were allocated during the secondary bootstrap for the 1458242531Sandrew * stacks for different CPU modes. 1459242531Sandrew * We must now set the r13 registers in the different CPU modes to 1460242531Sandrew * point to these stacks. 1461242531Sandrew * Since the ARM stacks use STMFD etc. we must set r13 to the top end 1462242531Sandrew * of the stack memory. 1463242531Sandrew */ 1464242531Sandrew cpu_control(CPU_CONTROL_MMU_ENABLE, CPU_CONTROL_MMU_ENABLE); 1465242531Sandrew 1466242531Sandrew set_stackptrs(0); 1467242531Sandrew 1468242531Sandrew /* 1469242531Sandrew * We must now clean the cache again.... 1470242531Sandrew * Cleaning may be done by reading new data to displace any 1471242531Sandrew * dirty data in the cache. This will have happened in setttb() 1472242531Sandrew * but since we are boot strapping the addresses used for the read 1473242531Sandrew * may have just been remapped and thus the cache could be out 1474242531Sandrew * of sync. A re-clean after the switch will cure this. 1475242531Sandrew * After booting there are no gross relocations of the kernel thus 1476242531Sandrew * this problem will not occur after initarm(). 1477242531Sandrew */ 1478242531Sandrew cpu_idcache_wbinv_all(); 1479242531Sandrew 1480242531Sandrew /* Set stack for exception handlers */ 1481242531Sandrew data_abort_handler_address = (u_int)data_abort_handler; 1482242531Sandrew prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 1483242531Sandrew undefined_handler_address = (u_int)undefinedinstruction_bounce; 1484242531Sandrew undefined_init(); 1485242531Sandrew 1486242531Sandrew init_proc0(kernelstack.pv_va); 1487242531Sandrew 1488245637Sian arm_intrnames_init(); 1489242531Sandrew arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 1490242531Sandrew arm_dump_avail_init(memsize, sizeof(dump_avail) / sizeof(dump_avail[0])); 1491247046Salc pmap_bootstrap(freemempos, &kernel_l1pt); 1492242531Sandrew msgbufp = (void *)msgbufpv.pv_va; 1493242531Sandrew msgbufinit(msgbufp, msgbufsize); 1494242531Sandrew mutex_init(); 1495242531Sandrew 1496242531Sandrew /* 1497242531Sandrew * Prepare map of physical memory regions available to vm subsystem. 1498242531Sandrew */ 1499242531Sandrew physmap_init(availmem_regions, availmem_regions_sz); 1500242531Sandrew 1501242531Sandrew init_param2(physmem); 1502242531Sandrew kdb_init(); 1503242531Sandrew 1504242531Sandrew return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP - 1505242531Sandrew sizeof(struct pcb))); 1506242531Sandrew} 1507242531Sandrew#endif 1508