system.cc revision 2665:a124942bacb8 
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/exec_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
51using namespace std;
52using namespace AlphaISA;
53
54FreebsdAlphaSystem::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
67FreebsdAlphaSystem::~FreebsdAlphaSystem()
68{
69    delete skipDelayEvent;
70    delete skipCalibrateClocks;
71}
72
73
74void
75FreebsdAlphaSystem::doCalibrateClocks(ExecContext *xc)
76{
77    Addr ppc_vaddr = 0;
78    Addr timer_vaddr = 0;
79
80    ppc_vaddr = (Addr)xc->readIntReg(ArgumentReg1);
81    timer_vaddr = (Addr)xc->readIntReg(ArgumentReg2);
82
83    virtPort.write(ppc_vaddr, (uint32_t)Clock::Frequency);
84    virtPort.write(timer_vaddr, (uint32_t)TIMER_FREQUENCY);
85}
86
87
88void
89FreebsdAlphaSystem::SkipCalibrateClocksEvent::process(ExecContext *xc)
90{
91    SkipFuncEvent::process(xc);
92    ((FreebsdAlphaSystem *)xc->getSystemPtr())->doCalibrateClocks(xc);
93}
94
95
96BEGIN_DECLARE_SIM_OBJECT_PARAMS(FreebsdAlphaSystem)
97
98    Param<Tick> boot_cpu_frequency;
99    SimObjectParam<PhysicalMemory *> physmem;
100
101    Param<string> kernel;
102    Param<string> console;
103    Param<string> pal;
104
105    Param<string> boot_osflags;
106    Param<string> readfile;
107    Param<unsigned int> init_param;
108
109    Param<uint64_t> system_type;
110    Param<uint64_t> system_rev;
111
112    Param<bool> bin;
113    VectorParam<string> binned_fns;
114    Param<bool> bin_int;
115
116END_DECLARE_SIM_OBJECT_PARAMS(FreebsdAlphaSystem)
117
118BEGIN_INIT_SIM_OBJECT_PARAMS(FreebsdAlphaSystem)
119
120    INIT_PARAM(boot_cpu_frequency, "Frequency of the boot CPU"),
121    INIT_PARAM(physmem, "phsyical memory"),
122    INIT_PARAM(kernel, "file that contains the kernel code"),
123    INIT_PARAM(console, "file that contains the console code"),
124    INIT_PARAM(pal, "file that contains palcode"),
125    INIT_PARAM_DFLT(boot_osflags, "flags to pass to the kernel during boot",
126                    "a"),
127    INIT_PARAM_DFLT(readfile, "file to read startup script from", ""),
128    INIT_PARAM_DFLT(init_param, "numerical value to pass into simulator", 0),
129    INIT_PARAM_DFLT(system_type, "Type of system we are emulating", 34),
130    INIT_PARAM_DFLT(system_rev, "Revision of system we are emulating", 1<<10),
131    INIT_PARAM_DFLT(bin, "is this system to be binned", false),
132    INIT_PARAM(binned_fns, "functions to be broken down and binned"),
133    INIT_PARAM_DFLT(bin_int, "is interrupt code binned seperately?", true)
134
135END_INIT_SIM_OBJECT_PARAMS(FreebsdAlphaSystem)
136
137CREATE_SIM_OBJECT(FreebsdAlphaSystem)
138{
139    AlphaSystem::Params *p = new AlphaSystem::Params;
140    p->name = getInstanceName();
141    p->boot_cpu_frequency = boot_cpu_frequency;
142    p->physmem = physmem;
143    p->kernel_path = kernel;
144    p->console_path = console;
145    p->palcode = pal;
146    p->boot_osflags = boot_osflags;
147    p->init_param = init_param;
148    p->readfile = readfile;
149    p->system_type = system_type;
150    p->system_rev = system_rev;
151    p->bin = bin;
152    p->binned_fns = binned_fns;
153    p->bin_int = bin_int;
154    return new FreebsdAlphaSystem(p);
155}
156
157REGISTER_SIM_OBJECT("FreebsdAlphaSystem", FreebsdAlphaSystem)
158
159