src/arch/arm/freebsd/fs_workload.cc

   1 /*
   2  * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
   3  * All rights reserved.
   4  *
   5  * This software was developed by the University of Cambridge Computer
   6  * Laboratory as part of the CTSRD Project, with support from the UK Higher
   7  * Education Innovation Fund (HEIF).
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions are
  11  * met: redistributions of source code must retain the above copyright
  12  * notice, this list of conditions and the following disclaimer;
  13  * redistributions in binary form must reproduce the above copyright
  14  * notice, this list of conditions and the following disclaimer in the
  15  * documentation and/or other materials provided with the distribution;
  16  * neither the name of the copyright holders nor the names of its
  17  * contributors may be used to endorse or promote products derived from
  18  * this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include "arch/arm/freebsd/fs_workload.hh"
  34
  35 #include "arch/arm/isa_traits.hh"
  36 #include "arch/arm/utility.hh"
  37 #include "arch/generic/freebsd/threadinfo.hh"
  38 #include "base/loader/dtb_file.hh"
  39 #include "base/loader/object_file.hh"
  40 #include "base/loader/symtab.hh"
  41 #include "cpu/base.hh"
  42 #include "cpu/pc_event.hh"
  43 #include "cpu/thread_context.hh"
  44 #include "debug/Loader.hh"
  45 #include "kern/freebsd/events.hh"
  46 #include "mem/physical.hh"
  47 #include "sim/stat_control.hh"
  48
  49 using namespace FreeBSD;
  50
  51 namespace ArmISA
  52 {
  53
  54 FsFreebsd::FsFreebsd(const Params &p) : ArmISA::FsWorkload(p),
  55     enableContextSwitchStatsDump(p.enable_context_switch_stats_dump)
  56 {
  57     if (p.panic_on_panic) {
  58         kernelPanic = addKernelFuncEventOrPanic<PanicPCEvent>(
  59             "panic", "Kernel panic in simulated kernel");
  60     } else {
  61 #ifndef NDEBUG
  62         kernelPanic = addKernelFuncEventOrPanic<BreakPCEvent>("panic");
  63 #endif
  64     }
  65
  66     if (p.panic_on_oops) {
  67         kernelOops = addKernelFuncEventOrPanic<PanicPCEvent>(
  68             "oops_exit", "Kernel oops in guest");
  69     }
  70
  71     skipUDelay = addKernelFuncEvent<SkipUDelay<ArmISA::SkipFunc>>(
  72         "DELAY", "DELAY", 1000, 0);
  73 }
  74
  75 void
  76 FsFreebsd::initState()
  77 {
  78     ArmISA::FsWorkload::initState();
  79
  80     // Load symbols at physical address, we might not want
  81     // to do this permanently, for but early bootup work
  82     // it is helpful.
  83     if (params().early_kernel_symbols) {
  84         auto phys_globals = kernelObj->symtab().globals()->mask(_loadAddrMask);
  85         kernelSymtab.insert(*phys_globals);
  86         Loader::debugSymbolTable.insert(*phys_globals);
  87     }
  88
  89     // Check if the kernel image has a symbol that tells us it supports
  90     // device trees.
  91     fatal_if(kernelSymtab.find("fdt_get_range") == kernelSymtab.end(),
  92              "Kernel must have fdt support.");
  93     fatal_if(params().dtb_filename == "", "dtb file is not specified.");
  94
  95     // Kernel supports flattened device tree and dtb file specified.
  96     // Using Device Tree Blob to describe system configuration.
  97     inform("Loading DTB file: %s at address %#x\n", params().dtb_filename,
  98             params().dtb_addr);
  99
 100     auto *dtb_file = new ::Loader::DtbFile(params().dtb_filename);
 101
 102     warn_if(!dtb_file->addBootCmdLine(commandLine.c_str(), commandLine.size()),
 103             "Couldn't append bootargs to DTB file: %s",
 104             params().dtb_filename);
 105
 106     Addr ra = dtb_file->findReleaseAddr();
 107     if (ra)
 108         bootReleaseAddr = ra & ~ULL(0x7F);
 109
 110     dtb_file->buildImage().
 111         offset(params().dtb_addr).
 112         write(system->physProxy);
 113     delete dtb_file;
 114
 115     // Kernel boot requirements to set up r0, r1 and r2 in ARMv7
 116     for (auto *tc: system->threads) {
 117         tc->setIntReg(0, 0);
 118         tc->setIntReg(1, params().machine_type);
 119         tc->setIntReg(2, params().dtb_addr);
 120     }
 121 }
 122
 123 FsFreebsd::~FsFreebsd()
 124 {
 125     delete skipUDelay;
 126 }
 127
 128 } // namespace ArmISA