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

     /*-
      * Copyright (c) 2006 Wojciech A. Koszek <wkoszek@FreeBSD.org>
      * Copyright (c) 2012 Robert N. M. Watson
      * All rights reserved.
      *
      * This software was developed by SRI International and the University of
      * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
      * ("CTSRD"), as part of the DARPA CRASH research programme.
      *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/10.0/sys/mips/beri/beri_machdep.c 247297 2013-02-26 01:00:11Z attilio $");
    
    #include "opt_ddb.h"
    #include "opt_platform.h"
    
    #include <sys/param.h>
    #include <sys/conf.h>
    #include <sys/kernel.h>
    #include <sys/systm.h>
    #include <sys/imgact.h>
    #include <sys/bio.h>
    #include <sys/buf.h>
    #include <sys/bus.h>
    #include <sys/cpu.h>
    #include <sys/cons.h>
    #include <sys/exec.h>
    #include <sys/linker.h>
    #include <sys/ucontext.h>
    #include <sys/proc.h>
    #include <sys/kdb.h>
    #include <sys/ptrace.h>
    #include <sys/reboot.h>
    #include <sys/signalvar.h>
    #include <sys/sysent.h>
    #include <sys/sysproto.h>
    #include <sys/user.h>
    
    #ifdef FDT
    #include <dev/fdt/fdt_common.h>
    #include <dev/ofw/openfirm.h>
    #endif
    
    #include <vm/vm.h>
    #include <vm/vm_object.h>
    #include <vm/vm_page.h>
    
    #include <machine/clock.h>
    #include <machine/cpu.h>
    #include <machine/cpuregs.h>
    #include <machine/hwfunc.h>
    #include <machine/md_var.h>
    #include <machine/metadata.h>
    #include <machine/pmap.h>
    #include <machine/trap.h>
    
    extern int      *edata;
    extern int      *end;
    
    void
    platform_cpu_init()
    {
            /* Nothing special */
    }
    
    static void
    mips_init(void)
    {
            int i;
    
            for (i = 0; i < 10; i++) {
                    phys_avail[i] = 0;
            }
    
            /* phys_avail regions are in bytes */
            phys_avail[0] = MIPS_KSEG0_TO_PHYS(kernel_kseg0_end);
            phys_avail[1] = ctob(realmem);
    
            dump_avail[0] = phys_avail[0];
           dump_avail[1] = phys_avail[1];
   
           physmem = realmem;
   
           init_param1();
           init_param2(physmem);
           mips_cpu_init();
           pmap_bootstrap();
           mips_proc0_init();
           mutex_init();
           kdb_init();
   #ifdef KDB
           if (boothowto & RB_KDB)
                   kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
   #endif
   }
   
   /*
    * Perform a board-level soft-reset.
    *
    * XXXRW: BERI doesn't yet have a board-level soft-reset.
    */
   void
   platform_reset(void)
   {
   
           panic("%s: not yet", __func__);
   }
   
   void
   platform_start(__register_t a0, __register_t a1,  __register_t a2, 
       __register_t a3)
   {
           vm_offset_t kernend;
           uint64_t platform_counter_freq;
           int argc = a0;
           char **argv = (char **)a1;
           char **envp = (char **)a2;
           unsigned int memsize = a3;
   #ifdef FDT
           vm_offset_t dtbp;
           void *kmdp;
   #endif
           int i;
   
           /* clear the BSS and SBSS segments */
           kernend = (vm_offset_t)&end;
           memset(&edata, 0, kernend - (vm_offset_t)(&edata));
   
           mips_postboot_fixup();
   
           mips_pcpu0_init();
   
   #ifdef FDT
           /*
            * Find the dtb passed in by the boot loader (currently fictional).
            */
           kmdp = preload_search_by_type("elf kernel");
           if (kmdp != NULL)
                   dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t);
           else
                   dtbp = (vm_offset_t)NULL;
   
   #if defined(FDT_DTB_STATIC)
           /*
            * In case the device tree blob was not retrieved (from metadata) try
            * to use the statically embedded one.
            */
           if (dtbp == (vm_offset_t)NULL)
                   dtbp = (vm_offset_t)&fdt_static_dtb;
   #else
   #error  "Non-static FDT not yet supported on BERI"
   #endif
   
           if (OF_install(OFW_FDT, 0) == FALSE)
                   while (1);
           if (OF_init(&fdt_static_dtb) != 0)
                   while (1);
   #endif
   
           /*
            * XXXRW: We have no way to compare wallclock time to cycle rate on
            * BERI, so for now assume we run at the MALTA default (100MHz).
            */
           platform_counter_freq = MIPS_DEFAULT_HZ;
           mips_timer_early_init(platform_counter_freq);
   
           cninit();
           printf("entry: platform_start()\n");
   
           bootverbose = 1;
           if (bootverbose) {
                   printf("cmd line: ");
                   for (i = 0; i < argc; i++)
                           printf("%s ", argv[i]);
                   printf("\n");
   
                   printf("envp:\n");
                   for (i = 0; envp[i]; i += 2)
                           printf("\t%s = %s\n", envp[i], envp[i+1]);
   
                   printf("memsize = %08x\n", memsize);
           }
   
           realmem = btoc(memsize);
           mips_init();
   
           mips_timer_init_params(platform_counter_freq, 0);
   }

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