kern/freebsd/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
  29 /**
  30  * @file
  31  * Modifications for the FreeBSD kernel.
  32  * Based on kern/linux/linux_system.cc.
  33  *
  34  */
  35
  36 #include "base/loader/symtab.hh"
  37 #include "cpu/exec_context.hh"
  38 #include "kern/freebsd/freebsd_system.hh"
  39 #include "mem/functional/memory_control.hh"
  40 #include "mem/functional/physical.hh"
  41 #include "sim/builder.hh"
  42 #include "targetarch/vtophys.hh"
  43
  44 #define TIMER_FREQUENCY 1193180
  45
  46 using namespace std;
  47
  48 FreebsdSystem::FreebsdSystem(Params *p)
  49     : System(p)
  50 {
  51     /**
  52      * Any time DELAY is called just skip the function.
  53      * Shouldn't we actually emulate the delay?
  54      */
  55     skipDelayEvent = addKernelFuncEvent<SkipFuncEvent>("DELAY");
  56     skipCalibrateClocks =
  57         addKernelFuncEvent<SkipCalibrateClocksEvent>("calibrate_clocks");
  58 }
  59
  60
  61 FreebsdSystem::~FreebsdSystem()
  62 {
  63     delete skipDelayEvent;
  64     delete skipCalibrateClocks;
  65 }
  66
  67
  68 void
  69 FreebsdSystem::doCalibrateClocks(ExecContext *xc)
  70 {
  71     Addr ppc_vaddr = 0;
  72     Addr timer_vaddr = 0;
  73     Addr ppc_paddr = 0;
  74     Addr timer_paddr = 0;
  75
  76     ppc_vaddr = (Addr)xc->regs.intRegFile[ArgumentReg1];
  77     timer_vaddr = (Addr)xc->regs.intRegFile[ArgumentReg2];
  78
  79     ppc_paddr = vtophys(physmem, ppc_vaddr);
  80     timer_paddr = vtophys(physmem, timer_vaddr);
  81
  82     uint8_t *ppc = physmem->dma_addr(ppc_paddr, sizeof(uint32_t));
  83     uint8_t *timer = physmem->dma_addr(timer_paddr, sizeof(uint32_t));
  84
  85     *(uint32_t *)ppc = htog((uint32_t)Clock::Frequency);
  86     *(uint32_t *)timer = htog((uint32_t)TIMER_FREQUENCY);
  87 }
  88
  89
  90 void
  91 FreebsdSystem::SkipCalibrateClocksEvent::process(ExecContext *xc)
  92 {
  93     SkipFuncEvent::process(xc);
  94     ((FreebsdSystem *)xc->system)->doCalibrateClocks(xc);
  95 }
  96
  97
  98 BEGIN_DECLARE_SIM_OBJECT_PARAMS(FreebsdSystem)
  99
 100     Param<Tick> boot_cpu_frequency;
 101     SimObjectParam<MemoryController *> memctrl;
 102     SimObjectParam<PhysicalMemory *> physmem;
 103
 104     Param<string> kernel;
 105     Param<string> console;
 106     Param<string> pal;
 107
 108     Param<string> boot_osflags;
 109     Param<string> readfile;
 110     Param<unsigned int> init_param;
 111
 112     Param<uint64_t> system_type;
 113     Param<uint64_t> system_rev;
 114
 115     Param<bool> bin;
 116     VectorParam<string> binned_fns;
 117     Param<bool> bin_int;
 118
 119 END_DECLARE_SIM_OBJECT_PARAMS(FreebsdSystem)
 120
 121 BEGIN_INIT_SIM_OBJECT_PARAMS(FreebsdSystem)
 122
 123     INIT_PARAM(boot_cpu_frequency, "Frequency of the boot CPU"),
 124     INIT_PARAM(memctrl, "memory controller"),
 125     INIT_PARAM(physmem, "phsyical memory"),
 126     INIT_PARAM(kernel, "file that contains the kernel code"),
 127     INIT_PARAM(console, "file that contains the console code"),
 128     INIT_PARAM(pal, "file that contains palcode"),
 129     INIT_PARAM_DFLT(boot_osflags, "flags to pass to the kernel during boot",
 130                     "a"),
 131     INIT_PARAM_DFLT(readfile, "file to read startup script from", ""),
 132     INIT_PARAM_DFLT(init_param, "numerical value to pass into simulator", 0),
 133     INIT_PARAM_DFLT(system_type, "Type of system we are emulating", 34),
 134     INIT_PARAM_DFLT(system_rev, "Revision of system we are emulating", 1<<10),
 135     INIT_PARAM_DFLT(bin, "is this system to be binned", false),
 136     INIT_PARAM(binned_fns, "functions to be broken down and binned"),
 137     INIT_PARAM_DFLT(bin_int, "is interrupt code binned seperately?", true)
 138
 139 END_INIT_SIM_OBJECT_PARAMS(FreebsdSystem)
 140
 141 CREATE_SIM_OBJECT(FreebsdSystem)
 142 {
 143     System::Params *p = new System::Params;
 144     p->name = getInstanceName();
 145     p->boot_cpu_frequency = boot_cpu_frequency;
 146     p->memctrl = memctrl;
 147     p->physmem = physmem;
 148     p->kernel_path = kernel;
 149     p->console_path = console;
 150     p->palcode = pal;
 151     p->boot_osflags = boot_osflags;
 152     p->init_param = init_param;
 153     p->readfile = readfile;
 154     p->system_type = system_type;
 155     p->system_rev = system_rev;
 156     p->bin = bin;
 157     p->binned_fns = binned_fns;
 158     p->bin_int = bin_int;
 159     return new FreebsdSystem(p);
 160 }
 161
 162 REGISTER_SIM_OBJECT("FreebsdSystem", FreebsdSystem)
 163