system.cc revision 8852:c744483edfcf 
1/*
2 * Copyright (c) 2010 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder.  You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Copyright (c) 2002-2006 The Regents of The University of Michigan
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution;
24 * neither the name of the copyright holders nor the names of its
25 * contributors may be used to endorse or promote products derived from
26 * this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Authors: Ali Saidi
41 */
42
43#include "arch/arm/linux/atag.hh"
44#include "arch/arm/linux/system.hh"
45#include "arch/arm/isa_traits.hh"
46#include "arch/arm/utility.hh"
47#include "base/loader/object_file.hh"
48#include "base/loader/symtab.hh"
49#include "cpu/thread_context.hh"
50#include "debug/Loader.hh"
51#include "kern/linux/events.hh"
52#include "mem/fs_translating_port_proxy.hh"
53#include "mem/physical.hh"
54
55using namespace ArmISA;
56using namespace Linux;
57
58LinuxArmSystem::LinuxArmSystem(Params *p)
59    : ArmSystem(p)
60{
61}
62
63bool
64LinuxArmSystem::adderBootUncacheable(Addr a)
65{
66    Addr block = a & ~ULL(0x7F);
67    if (block == secDataPtrAddr || block == secDataAddr ||
68            block == penReleaseAddr)
69        return true;
70    return false;
71}
72
73void
74LinuxArmSystem::initState()
75{
76    // Moved from the constructor to here since it relies on the
77    // address map being resolved in the interconnect
78
79    // Call the initialisation of the super class
80    ArmSystem::initState();
81
82    // Load symbols at physical address, we might not want
83    // to do this perminately, for but early bootup work
84    // it is helpfulp.
85    kernel->loadGlobalSymbols(kernelSymtab, loadAddrMask);
86    kernel->loadGlobalSymbols(debugSymbolTable, loadAddrMask);
87
88    // Setup boot data structure
89    AtagCore *ac = new AtagCore;
90    ac->flags(1); // read-only
91    ac->pagesize(8192);
92    ac->rootdev(0);
93
94    AtagMem *am = new AtagMem;
95    am->memSize(params()->physmem->size());
96    am->memStart(params()->physmem->start());
97
98    AtagCmdline *ad = new AtagCmdline;
99    ad->cmdline(params()->boot_osflags);
100
101    DPRINTF(Loader, "boot command line %d bytes: %s\n", ad->size() <<2, params()->boot_osflags.c_str());
102
103    AtagNone *an = new AtagNone;
104
105    uint32_t size = ac->size() + am->size() + ad->size() + an->size();
106    uint32_t offset = 0;
107    uint8_t *boot_data = new uint8_t[size << 2];
108
109    offset += ac->copyOut(boot_data + offset);
110    offset += am->copyOut(boot_data + offset);
111    offset += ad->copyOut(boot_data + offset);
112    offset += an->copyOut(boot_data + offset);
113
114    DPRINTF(Loader, "Boot atags was %d bytes in total\n", size << 2);
115    DDUMP(Loader, boot_data, size << 2);
116
117    physProxy.writeBlob(ParamsList, boot_data, size << 2);
118
119#ifndef NDEBUG
120    kernelPanicEvent = addKernelFuncEvent<BreakPCEvent>("panic");
121    if (!kernelPanicEvent)
122        panic("could not find kernel symbol \'panic\'");
123#endif
124
125    // With ARM udelay() is #defined to __udelay
126    Addr addr = 0;
127    if (kernelSymtab->findAddress("__udelay", addr)) {
128        uDelaySkipEvent = new UDelayEvent(&pcEventQueue, "__udelay",
129                fixFuncEventAddr(addr), 1000, 0);
130    } else {
131        panic("couldn't find kernel symbol \'udelay\'");
132    }
133
134    // constant arguments to udelay() have some precomputation done ahead of
135    // time. Constant comes from code.
136    if (kernelSymtab->findAddress("__const_udelay", addr)) {
137        constUDelaySkipEvent = new UDelayEvent(&pcEventQueue, "__const_udelay",
138                fixFuncEventAddr(addr), 1000, 107374);
139    } else {
140        panic("couldn't find kernel symbol \'udelay\'");
141    }
142
143    secDataPtrAddr = 0;
144    secDataAddr = 0;
145    penReleaseAddr = 0;
146    kernelSymtab->findAddress("__secondary_data", secDataPtrAddr);
147    kernelSymtab->findAddress("secondary_data", secDataAddr);
148    kernelSymtab->findAddress("pen_release", penReleaseAddr);
149
150    secDataPtrAddr &= ~ULL(0x7F);
151    secDataAddr &= ~ULL(0x7F);
152    penReleaseAddr &= ~ULL(0x7F);
153
154    for (int i = 0; i < threadContexts.size(); i++) {
155        threadContexts[i]->setIntReg(0, 0);
156        threadContexts[i]->setIntReg(1, params()->machine_type);
157        threadContexts[i]->setIntReg(2, ParamsList);
158    }
159}
160
161LinuxArmSystem::~LinuxArmSystem()
162{
163    if (uDelaySkipEvent)
164        delete uDelaySkipEvent;
165    if (constUDelaySkipEvent)
166        delete constUDelaySkipEvent;
167}
168
169LinuxArmSystem *
170LinuxArmSystemParams::create()
171{
172    return new LinuxArmSystem(this);
173}
174