sys/arch/evbmips/atheros/machdep.c

   1 /* $NetBSD: machdep.c,v 1.20 2009/11/27 03:23:08 rmind Exp $ */
   2
   3 /*
   4  * Copyright (c) 2006 Urbana-Champaign Independent Media Center.
   5  * Copyright (c) 2006 Garrett D'Amore.
   6  * All rights reserved.
   7  *
   8  * Portions of this code were written by Garrett D'Amore for the
   9  * Champaign-Urbana Community Wireless Network Project.
  10  *
  11  * Redistribution and use in source and binary forms, with or
  12  * without modification, are permitted provided that the following
  13  * conditions are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above
  17  *    copyright notice, this list of conditions and the following
  18  *    disclaimer in the documentation and/or other materials provided
  19  *    with the distribution.
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgements:
  22  *      This product includes software developed by the Urbana-Champaign
  23  *      Independent Media Center.
  24  *      This product includes software developed by Garrett D'Amore.
  25  * 4. Urbana-Champaign Independent Media Center's name and Garrett
  26  *    D'Amore's name may not be used to endorse or promote products
  27  *    derived from this software without specific prior written permission.
  28  *
  29  * THIS SOFTWARE IS PROVIDED BY THE URBANA-CHAMPAIGN INDEPENDENT
  30  * MEDIA CENTER AND GARRETT D'AMORE ``AS IS'' AND ANY EXPRESS OR
  31  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  32  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  33  * ARE DISCLAIMED.  IN NO EVENT SHALL THE URBANA-CHAMPAIGN INDEPENDENT
  34  * MEDIA CENTER OR GARRETT D'AMORE BE LIABLE FOR ANY DIRECT, INDIRECT,
  35  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  36  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  37  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  38  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  40  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  41  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  42  */
  43 /*-
  44  * Copyright (c) 2006 Itronix Inc.
  45  * All rights reserved.
  46  *
  47  * Portions written by Garrett D'Amore for Itronix Inc.
  48  *
  49  * Redistribution and use in source and binary forms, with or without
  50  * modification, are permitted provided that the following conditions
  51  * are met:
  52  * 1. Redistributions of source code must retain the above copyright
  53  *    notice, this list of conditions and the following disclaimer.
  54  * 2. Redistributions in binary form must reproduce the above copyright
  55  *    notice, this list of conditions and the following disclaimer in the
  56  *    documentation and/or other materials provided with the distribution.
  57  * 3. The name of Itronix Inc. may not be used to endorse
  58  *    or promote products derived from this software without specific
  59  *    prior written permission.
  60  *
  61  * THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``AS IS'' AND
  62  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  63  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  64  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL ITRONIX INC. BE LIABLE FOR ANY
  65  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  66  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  67  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  68  * ON ANY THEORY OF LIABILITY, WHETHER IN
  69  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  70  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  71  * POSSIBILITY OF SUCH DAMAGE.
  72  */
  73 /*
  74  * Copyright (c) 1992, 1993
  75  *      The Regents of the University of California.  All rights reserved.
  76  *
  77  * This code is derived from software contributed to Berkeley by
  78  * the Systems Programming Group of the University of Utah Computer
  79  * Science Department, The Mach Operating System project at
  80  * Carnegie-Mellon University and Ralph Campbell.
  81  *
  82  * Redistribution and use in source and binary forms, with or without
  83  * modification, are permitted provided that the following conditions
  84  * are met:
  85  * 1. Redistributions of source code must retain the above copyright
  86  *    notice, this list of conditions and the following disclaimer.
  87  * 2. Redistributions in binary form must reproduce the above copyright
  88  *    notice, this list of conditions and the following disclaimer in the
  89  *    documentation and/or other materials provided with the distribution.
  90  * 3. Neither the name of the University nor the names of its contributors
  91  *    may be used to endorse or promote products derived from this software
  92  *    without specific prior written permission.
  93  *
  94  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  95  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  96  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  97  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  98  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  99  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 100  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 101  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 102  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 103  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 104  * SUCH DAMAGE.
 105  *
 106  *      @(#)machdep.c   8.3 (Berkeley) 1/12/94
 107  *      from: Utah Hdr: machdep.c 1.63 91/04/24
 108  */
 109 /*
 110  * Copyright (c) 1988 University of Utah.
 111  *
 112  * This code is derived from software contributed to Berkeley by
 113  * the Systems Programming Group of the University of Utah Computer
 114  * Science Department, The Mach Operating System project at
 115  * Carnegie-Mellon University and Ralph Campbell.
 116  *
 117  * Redistribution and use in source and binary forms, with or without
 118  * modification, are permitted provided that the following conditions
 119  * are met:
 120  * 1. Redistributions of source code must retain the above copyright
 121  *    notice, this list of conditions and the following disclaimer.
 122  * 2. Redistributions in binary form must reproduce the above copyright
 123  *    notice, this list of conditions and the following disclaimer in the
 124  *    documentation and/or other materials provided with the distribution.
 125  * 3. All advertising materials mentioning features or use of this software
 126  *    must display the following acknowledgement:
 127  *      This product includes software developed by the University of
 128  *      California, Berkeley and its contributors.
 129  * 4. Neither the name of the University nor the names of its contributors
 130  *    may be used to endorse or promote products derived from this software
 131  *    without specific prior written permission.
 132  *
 133  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 134  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 135  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 136  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 137  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 138  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 139  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 140  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 141  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 142  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 143  * SUCH DAMAGE.
 144  *
 145  *      @(#)machdep.c   8.3 (Berkeley) 1/12/94
 146  *      from: Utah Hdr: machdep.c 1.63 91/04/24
 147  */
 148
 149 #include <sys/cdefs.h>                  /* RCS ID & Copyright macro defns */
 150 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.20 2009/11/27 03:23:08 rmind Exp $");
 151
 152 #include "opt_ddb.h"
 153 #include "opt_kgdb.h"
 154 #include "opt_modular.h"
 155
 156 #include <sys/param.h>
 157 #include <sys/systm.h>
 158 #include <sys/kernel.h>
 159 #include <sys/buf.h>
 160 #include <sys/reboot.h>
 161 #include <sys/mount.h>
 162 #include <sys/kcore.h>
 163 #include <sys/boot_flag.h>
 164 #include <sys/termios.h>
 165 #include <sys/ksyms.h>
 166 #include <sys/device.h>
 167
 168 #include <uvm/uvm_extern.h>
 169
 170 #include <dev/cons.h>
 171
 172 #include "ksyms.h"
 173
 174 #if NKSYMS || defined(DDB) || defined(MODULAR)
 175 #include <machine/db_machdep.h>
 176 #include <ddb/db_extern.h>
 177 #endif
 178
 179 #include <mips/cache.h>
 180 #include <mips/locore.h>
 181 #include <mips/cpuregs.h>
 182
 183 #include <mips/atheros/include/ar531xvar.h>
 184 #include <mips/atheros/include/arbusvar.h>
 185
 186 /* Our exported CPU info; we can have only one. */
 187 struct cpu_info cpu_info_store;
 188
 189 /* Maps for VM objects. */
 190 struct vm_map *mb_map = NULL;
 191 struct vm_map *phys_map = NULL;
 192
 193 int maxmem;                     /* max memory per process */
 194
 195 int mem_cluster_cnt;
 196 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
 197
 198 void    mach_init(void); /* XXX */
 199
 200 static void
 201 cal_timer(void)
 202 {
 203         uint32_t        cntfreq;
 204
 205         cntfreq = curcpu()->ci_cpu_freq = ar531x_cpu_freq();
 206
 207         /* MIPS 4Kc CP0 counts every other clock */
 208         if (mips_cpu_flags & CPU_MIPS_DOUBLE_COUNT)
 209                 cntfreq /= 2;
 210
 211         curcpu()->ci_cycles_per_hz = (cntfreq + hz / 2) / hz;
 212
 213         /* Compute number of cycles per 1us (1/MHz). 0.5MHz is for roundup. */
 214         curcpu()->ci_divisor_delay = ((cntfreq + 500000) / 1000000);
 215 }
 216
 217 void
 218 mach_init(void)
 219 {
 220         void *kernend;
 221         u_long first, last;
 222         struct pcb *pcb0;
 223         vaddr_t v;
 224         uint32_t memsize;
 225
 226         extern char edata[], end[];     /* XXX */
 227
 228         /* clear the BSS segment */
 229         kernend = (void *)mips_round_page(end);
 230
 231         memset(edata, 0, (char *)kernend - edata);
 232
 233         /* setup early console */
 234         ar531x_early_console();
 235
 236         /* set CPU model info for sysctl_hw */
 237         snprintf(cpu_model, 64, "%s", ar531x_cpuname());
 238
 239         /*
 240          * Set up the exception vectors and CPU-specific function
 241          * vectors early on.  We need the wbflush() vector set up
 242          * before comcnattach() is called (or at least before the
 243          * first printf() after that is called).
 244          * Sets up mips_cpu_flags that may be queried by other
 245          * functions called during startup.
 246          * Also clears the I+D caches.
 247          */
 248         mips_vector_init();
 249
 250         /*
 251          * Calibrate timers.
 252          */
 253         cal_timer();
 254
 255         /*
 256          * Set the VM page size.
 257          */
 258         uvm_setpagesize();
 259
 260         /*
 261          * Look at arguments passed to us and compute boothowto.
 262          */
 263         boothowto = RB_AUTOBOOT;
 264 #ifdef KADB
 265         boothowto |= RB_KDB;
 266 #endif
 267
 268         /*
 269          * This would be a good place to parse a boot command line, if
 270          * we got one from the bootloader.  Right now we have no way to
 271          * get one from e.g. vxworks.
 272          */
 273
 274         /*
 275          * Determine the memory size.
 276          *
 277          * Note: Reserve the first page!  That's where the trap
 278          * vectors are located.
 279          */
 280         memsize = ar531x_memsize();
 281
 282         printf("Memory size: 0x%08x\n", memsize);
 283         physmem = btoc(memsize);
 284
 285         mem_clusters[mem_cluster_cnt].start = PAGE_SIZE;
 286         mem_clusters[mem_cluster_cnt].size =
 287             memsize - mem_clusters[mem_cluster_cnt].start;
 288         mem_cluster_cnt++;
 289
 290         /*
 291          * Load the rest of the available pages into the VM system.
 292          */
 293         first = round_page(MIPS_KSEG0_TO_PHYS(kernend));
 294         last = mem_clusters[0].start + mem_clusters[0].size;
 295         uvm_page_physload(atop(first), atop(last), atop(first), atop(last),
 296             VM_FREELIST_DEFAULT);
 297
 298         /*
 299          * Initialize message buffer (at end of core).
 300          */
 301         mips_init_msgbuf();
 302
 303         /*
 304          * Initialize the virtual memory system.
 305          */
 306         pmap_bootstrap();
 307
 308         /*
 309          * Allocate uarea page for lwp0 and set it.
 310          */
 311         mips_init_lwp0_uarea();
 312
 313         /*
 314          * Initialize busses.
 315          */
 316         ar531x_businit();
 317
 318         /*
 319          * Turn off (ignore) the hardware watchdog.  If we got this
 320          * far, then we shouldn't need it anymore.
 321          */
 322         ar531x_wdog(0);
 323
 324         /*
 325          * Turn off watchpoint that may have been enabled by the
 326          * PROM.  VxWorks bootloader seems to leave one set.
 327          */
 328         __asm volatile (
 329                 "mtc0   $0, $" ___STRING(MIPS_COP_0_WATCH_LO) " \n\t"
 330                 "nop\n\t"
 331                 "nop\n\t");
 332
 333         /*
 334          * Initialize debuggers, and break into them, if appropriate.
 335          */
 336 #ifdef DDB
 337         if (boothowto & RB_KDB)
 338                 Debugger();
 339 #endif
 340 }
 341
 342 void
 343 consinit(void)
 344 {
 345
 346         /*
 347          * Everything related to console initialization is done
 348          * in mach_init().
 349          */
 350         ar531x_consinit();
 351 }
 352
 353 void
 354 cpu_startup(void)
 355 {
 356         char pbuf[9];
 357         vaddr_t minaddr, maxaddr;
 358 #ifdef DEBUG
 359         extern int pmapdebug;           /* XXX */
 360         int opmapdebug = pmapdebug;
 361
 362         pmapdebug = 0;          /* Shut up pmap debug during bootstrap */
 363 #endif
 364
 365         /*
 366          * Good {morning,afternoon,evening,night}.
 367          */
 368         printf("%s%s", copyright, version);
 369         printf("%s\n", cpu_model);
 370         format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
 371         printf("total memory = %s\n", pbuf);
 372
 373         minaddr = 0;
 374         /*
 375          * Allocate a submap for physio
 376          */
 377         phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
 378             VM_PHYS_SIZE, 0, FALSE, NULL);
 379
 380         /*
 381          * No need to allocate an mbuf cluster submap.  Mbuf clusters
 382          * are allocated via the pool allocator, and we use KSEG to
 383          * map those pages.
 384          */
 385
 386 #ifdef DEBUG
 387         pmapdebug = opmapdebug;
 388 #endif
 389         format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free));
 390         printf("avail memory = %s\n", pbuf);
 391 }
 392
 393 void
 394 cpu_reboot(int howto, char *bootstr)
 395 {
 396         static int waittime = -1;
 397
 398         /* Take a snapshot before clobbering any registers. */
 399         if (curproc)
 400                 savectx(curpcb);
 401
 402         /* If "always halt" was specified as a boot flag, obey. */
 403         if (boothowto & RB_HALT)
 404                 howto |= RB_HALT;
 405
 406         boothowto = howto;
 407
 408         /* If system is cold, just halt. */
 409         if (cold) {
 410                 boothowto |= RB_HALT;
 411                 goto haltsys;
 412         }
 413
 414         if ((boothowto & RB_NOSYNC) == 0 && waittime < 0) {
 415                 waittime = 0;
 416
 417                 /*
 418                  * Synchronize the disks....
 419                  */
 420                 vfs_shutdown();
 421
 422                 /*
 423                  * If we've been adjusting the clock, the todr
 424                  * will be out of synch; adjust it now.
 425                  */
 426                 resettodr();
 427         }
 428
 429         /* Disable interrupts. */
 430         splhigh();
 431
 432         if (boothowto & RB_DUMP)
 433                 dumpsys();
 434
 435  haltsys:
 436         /* Run any shutdown hooks. */
 437         doshutdownhooks();
 438
 439         pmf_system_shutdown(boothowto);
 440
 441 #if 0
 442         if ((boothowto & RB_POWERDOWN) == RB_POWERDOWN)
 443                 if (board && board->ab_poweroff)
 444                         board->ab_poweroff();
 445 #endif
 446
 447         /*
 448          * Firmware may autoboot (depending on settings), and we cannot pass
 449          * flags to it (at least I haven't figured out how to yet), so
 450          * we "pseudo-halt" now.
 451          */
 452         if (boothowto & RB_HALT) {
 453                 printf("\n");
 454                 printf("The operating system has halted.\n");
 455                 printf("Please press any key to reboot.\n\n");
 456                 cnpollc(1);     /* For proper keyboard command handling */
 457                 cngetc();
 458                 cnpollc(0);
 459         }
 460
 461         printf("reseting board...\n\n");
 462         mips_icache_sync_all();
 463         mips_dcache_wbinv_all();
 464         __asm volatile("jr      %0" :: "r"(MIPS_RESET_EXC_VEC));
 465         printf("Oops, back from reset\n\nSpinning...");
 466         for (;;)
 467                 /* spin forever */ ;    /* XXX */
 468         /*NOTREACHED*/
 469 }