system.cc revision 2158 
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 "arch/alpha/system.hh"
37#include "base/loader/symtab.hh"
38#include "cpu/exec_context.hh"
39#include "kern/freebsd/freebsd_system.hh"
40#include "mem/functional/memory_control.hh"
41#include "mem/functional/physical.hh"
42#include "sim/builder.hh"
43#include "arch/isa_traits.hh"
44#include "sim/byteswap.hh"
45#include "targetarch/vtophys.hh"
46
47#define TIMER_FREQUENCY 1193180
48
49using namespace std;
50using namespace TheISA;
51
52FreebsdSystem::FreebsdSystem(Params *p)
53    : AlphaSystem(p)
54{
55    /**
56     * Any time DELAY is called just skip the function.
57     * Shouldn't we actually emulate the delay?
58     */
59    skipDelayEvent = addKernelFuncEvent<SkipFuncEvent>("DELAY");
60    skipCalibrateClocks =
61        addKernelFuncEvent<SkipCalibrateClocksEvent>("calibrate_clocks");
62}
63
64
65FreebsdSystem::~FreebsdSystem()
66{
67    delete skipDelayEvent;
68    delete skipCalibrateClocks;
69}
70
71
72void
73FreebsdSystem::doCalibrateClocks(ExecContext *xc)
74{
75    Addr ppc_vaddr = 0;
76    Addr timer_vaddr = 0;
77    Addr ppc_paddr = 0;
78    Addr timer_paddr = 0;
79
80    ppc_vaddr = (Addr)xc->regs.intRegFile[ArgumentReg1];
81    timer_vaddr = (Addr)xc->regs.intRegFile[ArgumentReg2];
82
83    ppc_paddr = vtophys(physmem, ppc_vaddr);
84    timer_paddr = vtophys(physmem, timer_vaddr);
85
86    uint8_t *ppc = physmem->dma_addr(ppc_paddr, sizeof(uint32_t));
87    uint8_t *timer = physmem->dma_addr(timer_paddr, sizeof(uint32_t));
88
89    *(uint32_t *)ppc = htog((uint32_t)Clock::Frequency);
90    *(uint32_t *)timer = htog((uint32_t)TIMER_FREQUENCY);
91}
92
93
94void
95FreebsdSystem::SkipCalibrateClocksEvent::process(ExecContext *xc)
96{
97    SkipFuncEvent::process(xc);
98    ((FreebsdSystem *)xc->system)->doCalibrateClocks(xc);
99}
100
101
102BEGIN_DECLARE_SIM_OBJECT_PARAMS(FreebsdSystem)
103
104    Param<Tick> boot_cpu_frequency;
105    SimObjectParam<MemoryController *> memctrl;
106    SimObjectParam<PhysicalMemory *> physmem;
107
108    Param<string> kernel;
109    Param<string> console;
110    Param<string> pal;
111
112    Param<string> boot_osflags;
113    Param<string> readfile;
114    Param<unsigned int> init_param;
115
116    Param<uint64_t> system_type;
117    Param<uint64_t> system_rev;
118
119    Param<bool> bin;
120    VectorParam<string> binned_fns;
121    Param<bool> bin_int;
122
123END_DECLARE_SIM_OBJECT_PARAMS(FreebsdSystem)
124
125BEGIN_INIT_SIM_OBJECT_PARAMS(FreebsdSystem)
126
127    INIT_PARAM(boot_cpu_frequency, "Frequency of the boot CPU"),
128    INIT_PARAM(memctrl, "memory controller"),
129    INIT_PARAM(physmem, "phsyical memory"),
130    INIT_PARAM(kernel, "file that contains the kernel code"),
131    INIT_PARAM(console, "file that contains the console code"),
132    INIT_PARAM(pal, "file that contains palcode"),
133    INIT_PARAM_DFLT(boot_osflags, "flags to pass to the kernel during boot",
134                    "a"),
135    INIT_PARAM_DFLT(readfile, "file to read startup script from", ""),
136    INIT_PARAM_DFLT(init_param, "numerical value to pass into simulator", 0),
137    INIT_PARAM_DFLT(system_type, "Type of system we are emulating", 34),
138    INIT_PARAM_DFLT(system_rev, "Revision of system we are emulating", 1<<10),
139    INIT_PARAM_DFLT(bin, "is this system to be binned", false),
140    INIT_PARAM(binned_fns, "functions to be broken down and binned"),
141    INIT_PARAM_DFLT(bin_int, "is interrupt code binned seperately?", true)
142
143END_INIT_SIM_OBJECT_PARAMS(FreebsdSystem)
144
145CREATE_SIM_OBJECT(FreebsdSystem)
146{
147    AlphaSystem::Params *p = new AlphaSystem::Params;
148    p->name = getInstanceName();
149    p->boot_cpu_frequency = boot_cpu_frequency;
150    p->memctrl = memctrl;
151    p->physmem = physmem;
152    p->kernel_path = kernel;
153    p->console_path = console;
154    p->palcode = pal;
155    p->boot_osflags = boot_osflags;
156    p->init_param = init_param;
157    p->readfile = readfile;
158    p->system_type = system_type;
159    p->system_rev = system_rev;
160    p->bin = bin;
161    p->binned_fns = binned_fns;
162    p->bin_int = bin_int;
163    return new FreebsdSystem(p);
164}
165
166REGISTER_SIM_OBJECT("FreebsdSystem", FreebsdSystem)
167
168