sys/arch/evbmips/malta/machdep.c

   1 /*      $NetBSD: machdep.c,v 1.36 2009/11/27 03:23:08 rmind Exp $       */
   2
   3 /*
   4  * Copyright 2001, 2002 Wasabi Systems, Inc.
   5  * All rights reserved.
   6  *
   7  * Written by Jason R. Thorpe and Simon Burge for Wasabi Systems, Inc.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed for the NetBSD Project by
  20  *      Wasabi Systems, Inc.
  21  * 4. The name of Wasabi Systems, Inc. may not be used to endorse
  22  *    or promote products derived from this software without specific prior
  23  *    written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL WASABI SYSTEMS, INC
  29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  35  * POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 /*
  39  * Copyright (c) 1992, 1993
  40  *      The Regents of the University of California.  All rights reserved.
  41  *
  42  * This code is derived from software contributed to Berkeley by
  43  * the Systems Programming Group of the University of Utah Computer
  44  * Science Department, The Mach Operating System project at
  45  * Carnegie-Mellon University and Ralph Campbell.
  46  *
  47  * Redistribution and use in source and binary forms, with or without
  48  * modification, are permitted provided that the following conditions
  49  * are met:
  50  * 1. Redistributions of source code must retain the above copyright
  51  *    notice, this list of conditions and the following disclaimer.
  52  * 2. Redistributions in binary form must reproduce the above copyright
  53  *    notice, this list of conditions and the following disclaimer in the
  54  *    documentation and/or other materials provided with the distribution.
  55  * 3. Neither the name of the University nor the names of its contributors
  56  *    may be used to endorse or promote products derived from this software
  57  *    without specific prior written permission.
  58  *
  59  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  60  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  61  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  62  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  63  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  64  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  65  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  66  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  67  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  68  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  69  * SUCH DAMAGE.
  70  *
  71  *      @(#)machdep.c   8.3 (Berkeley) 1/12/94
  72  *      from: Utah Hdr: machdep.c 1.63 91/04/24
  73  */
  74 /*
  75  * Copyright (c) 1988 University of Utah.
  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. All advertising materials mentioning features or use of this software
  91  *    must display the following acknowledgement:
  92  *      This product includes software developed by the University of
  93  *      California, Berkeley and its contributors.
  94  * 4. Neither the name of the University nor the names of its contributors
  95  *    may be used to endorse or promote products derived from this software
  96  *    without specific prior written permission.
  97  *
  98  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  99  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 100  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 101  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 102  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 103  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 104  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 105  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 106  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 107  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 108  * SUCH DAMAGE.
 109  *
 110  *      @(#)machdep.c   8.3 (Berkeley) 1/12/94
 111  *      from: Utah Hdr: machdep.c 1.63 91/04/24
 112  */
 113
 114 #include <sys/cdefs.h>
 115 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.36 2009/11/27 03:23:08 rmind Exp $");
 116
 117 #include "opt_ddb.h"
 118 #include "opt_execfmt.h"
 119 #include "opt_modular.h"
 120
 121 #include <sys/param.h>
 122 #include <sys/systm.h>
 123 #include <sys/kernel.h>
 124 #include <sys/buf.h>
 125 #include <sys/reboot.h>
 126 #include <sys/mount.h>
 127 #include <sys/kcore.h>
 128 #include <sys/boot_flag.h>
 129 #include <sys/termios.h>
 130 #include <sys/ksyms.h>
 131 #include <sys/device.h>
 132
 133 #include <uvm/uvm_extern.h>
 134
 135 #include <dev/cons.h>
 136
 137 #include "ksyms.h"
 138
 139 #if NKSYMS || defined(DDB) || defined(MODULAR)
 140 #include <machine/db_machdep.h>
 141 #include <ddb/db_extern.h>
 142 #endif
 143
 144 #include <machine/cpu.h>
 145 #include <machine/psl.h>
 146 #include <machine/yamon.h>
 147
 148 #include <evbmips/malta/autoconf.h>
 149 #include <evbmips/malta/maltareg.h>
 150 #include <evbmips/malta/maltavar.h>
 151
 152 #include "com.h"
 153 #if NCOM > 0
 154 #include <dev/ic/comreg.h>
 155 #include <dev/ic/comvar.h>
 156
 157 int     comcnrate = 38400;      /* XXX should be config option */
 158 #endif /* NCOM > 0 */
 159
 160
 161 #define REGVAL(x)       *((volatile u_int32_t *)(MIPS_PHYS_TO_KSEG1((x))))
 162
 163 struct malta_config malta_configuration;
 164
 165 /* For sysctl_hw. */
 166 extern char cpu_model[];
 167
 168 /* Our exported CPU info; we can have only one. */
 169 struct cpu_info cpu_info_store;
 170
 171 /* Maps for VM objects. */
 172 struct vm_map *mb_map = NULL;
 173 struct vm_map *phys_map = NULL;
 174
 175 int     physmem;                /* Total physical memory */
 176
 177 int     netboot;                /* Are we netbooting? */
 178
 179 yamon_env_var *yamon_envp;
 180
 181 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
 182 int mem_cluster_cnt;
 183
 184 void    configure(void);
 185 void    mach_init(int, char **, yamon_env_var *, u_long);
 186
 187 /*
 188  * safepri is a safe priority for sleep to set for a spin-wait during
 189  * autoconfiguration or after a panic.  Used as an argument to splx().
 190  */
 191 int     safepri = MIPS1_PSL_LOWIPL;
 192
 193 /*
 194  * Do all the stuff that locore normally does before calling main().
 195  */
 196 void
 197 mach_init(int argc, char **argv, yamon_env_var *envp, u_long memsize)
 198 {
 199         struct malta_config *mcp = &malta_configuration;
 200         bus_space_handle_t sh;
 201         void *kernend;
 202         u_long first, last;
 203         int freqok;
 204         uint8_t *brkres = (uint8_t *)MIPS_PHYS_TO_KSEG1(MALTA_BRKRES);
 205
 206         extern char edata[], end[];
 207
 208         CTASSERT((intptr_t)MIPS_PHYS_TO_KSEG1(MALTA_BRKRES) < 0);
 209
 210         *brkres = 0;    /* Disable BREAK==reset on console */
 211
 212         /* Get the propaganda in early! */
 213         led_display_str("NetBSD");
 214
 215         /*
 216          * Clear the BSS segment.
 217          */
 218         kernend = (void *)mips_round_page(end);
 219         memset(edata, 0, (char *)kernend - edata);
 220
 221         /* save the yamon environment pointer */
 222         yamon_envp = envp;
 223
 224         /* Use YAMON callbacks for early console I/O */
 225         cn_tab = &yamon_promcd;
 226
 227         /*
 228          * Set up the exception vectors and CPU-specific function
 229          * vectors early on.  We need the wbflush() vector set up
 230          * before comcnattach() is called (or at least before the
 231          * first printf() after that is called).
 232          * Also clears the I+D caches.
 233          */
 234         mips_vector_init();
 235
 236         /* set the VM page size */
 237         uvm_setpagesize();
 238
 239         physmem = btoc(memsize);
 240
 241         /*
 242          * Use YAMON's CPU frequency if available.
 243          */
 244         freqok = yamon_setcpufreq(1);
 245
 246         gt_pci_init(&mcp->mc_pc, &mcp->mc_gt);
 247         malta_bus_io_init(&mcp->mc_iot, mcp);
 248         malta_bus_mem_init(&mcp->mc_memt, mcp);
 249         malta_dma_init(mcp);
 250
 251         /*
 252          * Calibrate the timer if YAMON failed to tell us.
 253          */
 254         if (!freqok) {
 255                 bus_space_map(&mcp->mc_iot, MALTA_RTCADR, 2, 0, &sh);
 256                 malta_cal_timer(&mcp->mc_iot, sh);
 257                 bus_space_unmap(&mcp->mc_iot, sh, 2);
 258         }
 259
 260 #if NCOM > 0
 261         /*
 262          * Delay to allow firmware putchars to complete.
 263          * FIFO depth * character time.
 264          * character time = (1000000 / (defaultrate / 10))
 265          */
 266         delay(160000000 / comcnrate);
 267         if (comcnattach(&mcp->mc_iot, MALTA_UART0ADR, comcnrate,
 268             COM_FREQ, COM_TYPE_NORMAL,
 269             (TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8) != 0)
 270                 panic("malta: unable to initialize serial console");
 271 #else
 272         panic("malta: not configured to use serial console");
 273 #endif /* NCOM > 0 */
 274
 275         mem_clusters[0].start = 0;
 276         mem_clusters[0].size = ctob(physmem);
 277         mem_cluster_cnt = 1;
 278
 279         strcpy(cpu_model, "MIPS Malta Evaluation Board");
 280
 281         /*
 282          * XXX: check argv[0] - do something if "gdb"???
 283          */
 284
 285         /*
 286          * Look at arguments passed to us and compute boothowto.
 287          */
 288         boothowto = RB_AUTOBOOT;
 289 #ifndef _LP64
 290         for (int i = 1; i < argc; i++) {
 291                 for (char *cp = argv[i]; *cp; cp++) {
 292                         int howto;
 293                         /* Ignore superfluous '-', if there is one */
 294                         if (*cp == '-')
 295                                 continue;
 296
 297                         howto = 0;
 298                         BOOT_FLAG(*cp, howto);
 299                         if (! howto)
 300                                 printf("bootflag '%c' not recognised\n", *cp);
 301                         else
 302                                 boothowto |= howto;
 303                 }
 304         }
 305 #endif
 306
 307         /*
 308          * Load the rest of the available pages into the VM system.
 309          */
 310         first = round_page(MIPS_KSEG0_TO_PHYS(kernend));
 311         last = mem_clusters[0].start + mem_clusters[0].size;
 312         uvm_page_physload(atop(first), atop(last), atop(first), atop(last),
 313                 VM_FREELIST_DEFAULT);
 314
 315         /*
 316          * Initialize error message buffer (at end of core).
 317          */
 318         mips_init_msgbuf();
 319
 320         pmap_bootstrap();
 321
 322         /*
 323          * Allocate uarea page for lwp0 and set it.
 324          */
 325         mips_init_lwp0_uarea();
 326
 327         /*
 328          * Initialize debuggers, and break into them, if appropriate.
 329          */
 330 #if defined(DDB)
 331         if (boothowto & RB_KDB)
 332                 Debugger();
 333 #endif
 334 }
 335
 336 void
 337 consinit(void)
 338 {
 339
 340         /*
 341          * Everything related to console initialization is done
 342          * in mach_init().
 343          */
 344 }
 345
 346 /*
 347  * Allocate memory for variable-sized tables,
 348  */
 349 void
 350 cpu_startup(void)
 351 {
 352         vaddr_t minaddr, maxaddr;
 353         char pbuf[9];
 354
 355         /*
 356          * Good {morning,afternoon,evening,night}.
 357          */
 358         printf("%s%s", copyright, version);
 359         format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
 360         printf("total memory = %s\n", pbuf);
 361
 362         /*
 363          * Virtual memory is bootstrapped -- notify the bus spaces
 364          * that memory allocation is now safe.
 365          */
 366         malta_configuration.mc_mallocsafe = 1;
 367
 368         minaddr = 0;
 369         /*
 370          * Allocate a submap for physio.
 371          */
 372         phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
 373                                     VM_PHYS_SIZE, 0, FALSE, NULL);
 374
 375         /*
 376          * (No need to allocate an mbuf cluster submap.  Mbuf clusters
 377          * are allocated via the pool allocator, and we use KSEG to
 378          * map those pages.)
 379          */
 380
 381         format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free));
 382         printf("avail memory = %s\n", pbuf);
 383 }
 384
 385 int     waittime = -1;
 386
 387 void
 388 cpu_reboot(int howto, char *bootstr)
 389 {
 390
 391         /* Take a snapshot before clobbering any registers. */
 392         if (curproc)
 393                 savectx(curpcb);
 394
 395         if (cold) {
 396                 howto |= RB_HALT;
 397                 goto haltsys;
 398         }
 399
 400         /* If "always halt" was specified as a boot flag, obey. */
 401         if (boothowto & RB_HALT)
 402                 howto |= RB_HALT;
 403
 404         boothowto = howto;
 405         if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) {
 406                 waittime = 0;
 407                 vfs_shutdown();
 408
 409                 /*
 410                  * If we've been adjusting the clock, the todr
 411                  * will be out of synch; adjust it now.
 412                  */
 413                 resettodr();
 414         }
 415
 416         splhigh();
 417
 418         if (howto & RB_DUMP)
 419                 dumpsys();
 420
 421 haltsys:
 422         doshutdownhooks();
 423
 424         pmf_system_shutdown(boothowto);
 425
 426         if (howto & RB_HALT) {
 427                 printf("\n");
 428                 printf("The operating system has halted.\n");
 429                 printf("Please press any key to reboot.\n\n");
 430                 cnpollc(1);     /* For proper keyboard command handling */
 431                 cngetc();
 432                 cnpollc(0);
 433         }
 434
 435         printf("%s\n\n", ((howto & RB_HALT) != 0) ? "halted." : "rebooting...");
 436         yamon_exit(boothowto);
 437         printf("Oops, back from yamon_exit()\n\nResetting...");
 438
 439         REGVAL(MALTA_SOFTRES) = MALTA_GORESET;
 440
 441         /*
 442          * Need a small delay here, otherwise we see the first few characters of
 443          * the warning below.
 444          */
 445         delay(80000);
 446
 447         printf("WARNING: reset failed!\nSpinning...");
 448
 449         for (;;)
 450                 /* spin forever */ ;    /* XXX */
 451 }