src/arch/alpha/freebsd/system.cc

   1 /*
   2  * Copyright (c) 2004-2005 The Regents of The University of Michigan
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met: redistributions of source code must retain the above copyright
   8  * notice, this list of conditions and the following disclaimer;
   9  * redistributions in binary form must reproduce the above copyright
  10  * notice, this list of conditions and the following disclaimer in the
  11  * documentation and/or other materials provided with the distribution;
  12  * neither the name of the copyright holders nor the names of its
  13  * contributors may be used to endorse or promote products derived from
  14  * this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  19  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  20  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * Authors: Ben Nash
  29  */
  30
  31 /**
  32  * @file
  33  * Modifications for the FreeBSD kernel.
  34  * Based on kern/linux/linux_system.cc.
  35  *
  36  */
  37
  38 #include "arch/alpha/system.hh"
  39 #include "arch/alpha/freebsd/system.hh"
  40 #include "base/loader/symtab.hh"
  41 #include "cpu/thread_context.hh"
  42 #include "mem/physical.hh"
  43 #include "mem/port.hh"
  44 #include "arch/isa_traits.hh"
  45 #include "sim/builder.hh"
  46 #include "sim/byteswap.hh"
  47 #include "arch/vtophys.hh"
  48
  49 #define TIMER_FREQUENCY 1193180
  50
  51 using namespace std;
  52 using namespace AlphaISA;
  53
  54 FreebsdAlphaSystem::FreebsdAlphaSystem(Params *p)
  55     : AlphaSystem(p)
  56 {
  57     /**
  58      * Any time DELAY is called just skip the function.
  59      * Shouldn't we actually emulate the delay?
  60      */
  61     skipDelayEvent = addKernelFuncEvent<SkipFuncEvent>("DELAY");
  62     skipCalibrateClocks =
  63         addKernelFuncEvent<SkipCalibrateClocksEvent>("calibrate_clocks");
  64 }
  65
  66
  67 FreebsdAlphaSystem::~FreebsdAlphaSystem()
  68 {
  69     delete skipDelayEvent;
  70     delete skipCalibrateClocks;
  71 }
  72
  73
  74 void
  75 FreebsdAlphaSystem::doCalibrateClocks(ThreadContext *tc)
  76 {
  77     Addr ppc_vaddr = 0;
  78     Addr timer_vaddr = 0;
  79
  80     ppc_vaddr = (Addr)tc->readIntReg(ArgumentReg1);
  81     timer_vaddr = (Addr)tc->readIntReg(ArgumentReg2);
  82
  83     virtPort.write(ppc_vaddr, (uint32_t)Clock::Frequency);
  84     virtPort.write(timer_vaddr, (uint32_t)TIMER_FREQUENCY);
  85 }
  86
  87
  88 void
  89 FreebsdAlphaSystem::SkipCalibrateClocksEvent::process(ThreadContext *tc)
  90 {
  91     SkipFuncEvent::process(tc);
  92     ((FreebsdAlphaSystem *)tc->getSystemPtr())->doCalibrateClocks(tc);
  93 }
  94
  95
  96 BEGIN_DECLARE_SIM_OBJECT_PARAMS(FreebsdAlphaSystem)
  97
  98     Param<Tick> boot_cpu_frequency;
  99     SimObjectParam<PhysicalMemory *> physmem;
 100     SimpleEnumParam<System::MemoryMode> mem_mode;
 101
 102     Param<string> kernel;
 103     Param<string> console;
 104     Param<string> pal;
 105
 106     Param<string> boot_osflags;
 107     Param<string> readfile;
 108     Param<unsigned int> init_param;
 109
 110     Param<uint64_t> system_type;
 111     Param<uint64_t> system_rev;
 112
 113 END_DECLARE_SIM_OBJECT_PARAMS(FreebsdAlphaSystem)
 114
 115 BEGIN_INIT_SIM_OBJECT_PARAMS(FreebsdAlphaSystem)
 116
 117     INIT_PARAM(boot_cpu_frequency, "Frequency of the boot CPU"),
 118     INIT_PARAM(physmem, "phsyical memory"),
 119     INIT_ENUM_PARAM(mem_mode, "Memory Mode, (1=atomic, 2=timing)",
 120             System::MemoryModeStrings),
 121     INIT_PARAM(kernel, "file that contains the kernel code"),
 122     INIT_PARAM(console, "file that contains the console code"),
 123     INIT_PARAM(pal, "file that contains palcode"),
 124     INIT_PARAM_DFLT(boot_osflags, "flags to pass to the kernel during boot",
 125                     "a"),
 126     INIT_PARAM_DFLT(readfile, "file to read startup script from", ""),
 127     INIT_PARAM_DFLT(init_param, "numerical value to pass into simulator", 0),
 128     INIT_PARAM_DFLT(system_type, "Type of system we are emulating", 34),
 129     INIT_PARAM_DFLT(system_rev, "Revision of system we are emulating", 1<<10)
 130
 131 END_INIT_SIM_OBJECT_PARAMS(FreebsdAlphaSystem)
 132
 133 CREATE_SIM_OBJECT(FreebsdAlphaSystem)
 134 {
 135     AlphaSystem::Params *p = new AlphaSystem::Params;
 136     p->name = getInstanceName();
 137     p->boot_cpu_frequency = boot_cpu_frequency;
 138     p->physmem = physmem;
 139     p->mem_mode = mem_mode;
 140     p->kernel_path = kernel;
 141     p->console_path = console;
 142     p->palcode = pal;
 143     p->boot_osflags = boot_osflags;
 144     p->init_param = init_param;
 145     p->readfile = readfile;
 146     p->system_type = system_type;
 147     p->system_rev = system_rev;
 148     return new FreebsdAlphaSystem(p);
 149 }
 150
 151 REGISTER_SIM_OBJECT("FreebsdAlphaSystem", FreebsdAlphaSystem)
 152