The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/mips/beri/beri_machdep.c

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    1 /*-
    2  * Copyright (c) 2006 Wojciech A. Koszek <wkoszek@FreeBSD.org>
    3  * Copyright (c) 2012 Robert N. M. Watson
    4  * All rights reserved.
    5  *
    6  * This software was developed by SRI International and the University of
    7  * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
    8  * ("CTSRD"), as part of the DARPA CRASH research programme.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  */
   31 #include <sys/cdefs.h>
   32 __FBSDID("$FreeBSD: releng/10.2/sys/mips/beri/beri_machdep.c 270058 2014-08-16 14:14:29Z bz $");
   33 
   34 #include "opt_ddb.h"
   35 #include "opt_platform.h"
   36 
   37 #include <sys/param.h>
   38 #include <sys/conf.h>
   39 #include <sys/kernel.h>
   40 #include <sys/systm.h>
   41 #include <sys/imgact.h>
   42 #include <sys/bio.h>
   43 #include <sys/buf.h>
   44 #include <sys/bus.h>
   45 #include <sys/cpu.h>
   46 #include <sys/cons.h>
   47 #include <sys/exec.h>
   48 #include <sys/linker.h>
   49 #include <sys/ucontext.h>
   50 #include <sys/proc.h>
   51 #include <sys/kdb.h>
   52 #include <sys/ptrace.h>
   53 #include <sys/reboot.h>
   54 #include <sys/signalvar.h>
   55 #include <sys/sysent.h>
   56 #include <sys/sysproto.h>
   57 #include <sys/user.h>
   58 
   59 #ifdef FDT
   60 #include <dev/fdt/fdt_common.h>
   61 #include <dev/ofw/openfirm.h>
   62 #endif
   63 
   64 #include <vm/vm.h>
   65 #include <vm/vm_object.h>
   66 #include <vm/vm_page.h>
   67 
   68 #include <machine/clock.h>
   69 #include <machine/cpu.h>
   70 #include <machine/cpuregs.h>
   71 #include <machine/hwfunc.h>
   72 #include <machine/md_var.h>
   73 #include <machine/metadata.h>
   74 #include <machine/pmap.h>
   75 #include <machine/trap.h>
   76 
   77 extern int      *edata;
   78 extern int      *end;
   79 
   80 void
   81 platform_cpu_init()
   82 {
   83         /* Nothing special */
   84 }
   85 
   86 static void
   87 mips_init(void)
   88 {
   89         int i;
   90 
   91         for (i = 0; i < 10; i++) {
   92                 phys_avail[i] = 0;
   93         }
   94 
   95         /* phys_avail regions are in bytes */
   96         phys_avail[0] = MIPS_KSEG0_TO_PHYS(kernel_kseg0_end);
   97         phys_avail[1] = ctob(realmem);
   98 
   99         dump_avail[0] = phys_avail[0];
  100         dump_avail[1] = phys_avail[1];
  101 
  102         physmem = realmem;
  103 
  104         init_param1();
  105         init_param2(physmem);
  106         mips_cpu_init();
  107         pmap_bootstrap();
  108         mips_proc0_init();
  109         mutex_init();
  110         kdb_init();
  111 #ifdef KDB
  112         if (boothowto & RB_KDB)
  113                 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
  114 #endif
  115 }
  116 
  117 /*
  118  * Perform a board-level soft-reset.
  119  */
  120 void
  121 platform_reset(void)
  122 {
  123 
  124         /* XXX SMP will likely require us to do more. */
  125         __asm__ __volatile__(
  126                 "mfc0 $k0, $12\n\t"
  127                 "li $k1, 0x00100000\n\t"
  128                 "or $k0, $k0, $k1\n\t"
  129                 "mtc0 $k0, $12\n");
  130         for( ; ; )
  131                 __asm__ __volatile("wait");
  132 }
  133 
  134 #ifdef FDT
  135 /* Parse cmd line args as env - copied from xlp_machdep. */
  136 /* XXX-BZ this should really be centrally provided for all (boot) code. */
  137 static void
  138 _parse_bootargs(char *cmdline)
  139 {
  140         char *n, *v;
  141 
  142         while ((v = strsep(&cmdline, " \n")) != NULL) {
  143                 if (*v == '\0')
  144                         continue;
  145                 if (*v == '-') {
  146                         while (*v != '\0') {
  147                                 v++;
  148                                 switch (*v) {
  149                                 case 'a': boothowto |= RB_ASKNAME; break;
  150                                 /* Someone should simulate that ;-) */
  151                                 case 'C': boothowto |= RB_CDROM; break;
  152                                 case 'd': boothowto |= RB_KDB; break;
  153                                 case 'D': boothowto |= RB_MULTIPLE; break;
  154                                 case 'm': boothowto |= RB_MUTE; break;
  155                                 case 'g': boothowto |= RB_GDB; break;
  156                                 case 'h': boothowto |= RB_SERIAL; break;
  157                                 case 'p': boothowto |= RB_PAUSE; break;
  158                                 case 'r': boothowto |= RB_DFLTROOT; break;
  159                                 case 's': boothowto |= RB_SINGLE; break;
  160                                 case 'v': boothowto |= RB_VERBOSE; break;
  161                                 }
  162                         }
  163                 } else {
  164                         n = strsep(&v, "=");
  165                         if (v == NULL)
  166                                 setenv(n, "1");
  167                         else
  168                                 setenv(n, v);
  169                 }
  170         }
  171 }
  172 #endif
  173 
  174 void
  175 platform_start(__register_t a0, __register_t a1,  __register_t a2, 
  176     __register_t a3)
  177 {
  178         vm_offset_t kernend;
  179         uint64_t platform_counter_freq;
  180         int argc = a0;
  181         char **argv = (char **)a1;
  182         char **envp = (char **)a2;
  183         unsigned int memsize = a3;
  184 #ifdef FDT
  185         char buf[2048];         /* early stack supposedly big enough */
  186         vm_offset_t dtbp;
  187         phandle_t chosen;
  188         void *kmdp;
  189 #endif
  190         int i;
  191 
  192         /* clear the BSS and SBSS segments */
  193         kernend = (vm_offset_t)&end;
  194         memset(&edata, 0, kernend - (vm_offset_t)(&edata));
  195 
  196         mips_postboot_fixup();
  197 
  198         mips_pcpu0_init();
  199 
  200 #ifdef FDT
  201         /*
  202          * Find the dtb passed in by the boot loader (currently fictional).
  203          */
  204         kmdp = preload_search_by_type("elf kernel");
  205         if (kmdp != NULL)
  206                 dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t);
  207         else
  208                 dtbp = (vm_offset_t)NULL;
  209 
  210 #if defined(FDT_DTB_STATIC)
  211         /*
  212          * In case the device tree blob was not retrieved (from metadata) try
  213          * to use the statically embedded one.
  214          */
  215         if (dtbp == (vm_offset_t)NULL)
  216                 dtbp = (vm_offset_t)&fdt_static_dtb;
  217 #else
  218 #error  "Non-static FDT not yet supported on BERI"
  219 #endif
  220 
  221         if (OF_install(OFW_FDT, 0) == FALSE)
  222                 while (1);
  223         if (OF_init((void *)dtbp) != 0)
  224                 while (1);
  225 
  226         /*
  227          * Get bootargs from FDT if specified.
  228          */
  229         chosen = OF_finddevice("/chosen");
  230         if (OF_getprop(chosen, "bootargs", buf, sizeof(buf)) != -1)
  231                 _parse_bootargs(buf);
  232 #endif
  233 
  234         /*
  235          * XXXRW: We have no way to compare wallclock time to cycle rate on
  236          * BERI, so for now assume we run at the MALTA default (100MHz).
  237          */
  238         platform_counter_freq = MIPS_DEFAULT_HZ;
  239         mips_timer_early_init(platform_counter_freq);
  240 
  241         cninit();
  242         printf("entry: platform_start()\n");
  243 
  244         bootverbose = 1;
  245         if (bootverbose) {
  246                 printf("cmd line: ");
  247                 for (i = 0; i < argc; i++)
  248                         printf("%s ", argv[i]);
  249                 printf("\n");
  250 
  251                 printf("envp:\n");
  252                 for (i = 0; envp[i]; i += 2)
  253                         printf("\t%s = %s\n", envp[i], envp[i+1]);
  254 
  255                 printf("memsize = %08x\n", memsize);
  256         }
  257 
  258         realmem = btoc(memsize);
  259         mips_init();
  260 
  261         mips_timer_init_params(platform_counter_freq, 0);
  262 }

Cache object: c788ed297ebb20948a27699f68c3cab8


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