system.cc revision 1885 
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
46using namespace std;
47
48FreebsdSystem::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
61FreebsdSystem::~FreebsdSystem()
62{
63    delete skipDelayEvent;
64    delete skipCalibrateClocks;
65}
66
67
68void
69FreebsdSystem::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
90void
91FreebsdSystem::SkipCalibrateClocksEvent::process(ExecContext *xc)
92{
93    SkipFuncEvent::process(xc);
94    ((FreebsdSystem *)xc->system)->doCalibrateClocks(xc);
95}
96
97
98BEGIN_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
119END_DECLARE_SIM_OBJECT_PARAMS(FreebsdSystem)
120
121BEGIN_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
139END_INIT_SIM_OBJECT_PARAMS(FreebsdSystem)
140
141CREATE_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
162REGISTER_SIM_OBJECT("FreebsdSystem", FreebsdSystem)
163
164