system.cc revision 8997:f07639e4b676 
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#ifndef NDEBUG
62    kernelPanicEvent = addKernelFuncEvent<BreakPCEvent>("panic");
63    if (!kernelPanicEvent)
64        panic("could not find kernel symbol \'panic\'");
65#endif
66
67    // With ARM udelay() is #defined to __udelay
68    Addr addr = 0;
69    if (kernelSymtab->findAddress("__udelay", addr)) {
70        uDelaySkipEvent = new UDelayEvent(&pcEventQueue, "__udelay",
71                fixFuncEventAddr(addr), 1000, 0);
72    } else {
73        panic("couldn't find kernel symbol \'udelay\'");
74    }
75
76    // constant arguments to udelay() have some precomputation done ahead of
77    // time. Constant comes from code.
78    if (kernelSymtab->findAddress("__const_udelay", addr)) {
79        constUDelaySkipEvent = new UDelayEvent(&pcEventQueue, "__const_udelay",
80                fixFuncEventAddr(addr), 1000, 107374);
81    } else {
82        panic("couldn't find kernel symbol \'udelay\'");
83    }
84
85    secDataPtrAddr = 0;
86    secDataAddr = 0;
87    penReleaseAddr = 0;
88    kernelSymtab->findAddress("__secondary_data", secDataPtrAddr);
89    kernelSymtab->findAddress("secondary_data", secDataAddr);
90    kernelSymtab->findAddress("pen_release", penReleaseAddr);
91
92    secDataPtrAddr &= ~ULL(0x7F);
93    secDataAddr &= ~ULL(0x7F);
94    penReleaseAddr &= ~ULL(0x7F);
95}
96
97bool
98LinuxArmSystem::adderBootUncacheable(Addr a)
99{
100    Addr block = a & ~ULL(0x7F);
101    if (block == secDataPtrAddr || block == secDataAddr ||
102            block == penReleaseAddr)
103        return true;
104    return false;
105}
106
107void
108LinuxArmSystem::initState()
109{
110    // Moved from the constructor to here since it relies on the
111    // address map being resolved in the interconnect
112
113    // Call the initialisation of the super class
114    ArmSystem::initState();
115
116    // Load symbols at physical address, we might not want
117    // to do this permanently, for but early bootup work
118    // it is helpful.
119    if (params()->early_kernel_symbols) {
120        kernel->loadGlobalSymbols(kernelSymtab, loadAddrMask);
121        kernel->loadGlobalSymbols(debugSymbolTable, loadAddrMask);
122    }
123
124    // Setup boot data structure
125    AtagCore *ac = new AtagCore;
126    ac->flags(1); // read-only
127    ac->pagesize(8192);
128    ac->rootdev(0);
129
130    AddrRangeList atagRanges = physmem.getConfAddrRanges();
131    if (atagRanges.size() != 1) {
132        fatal("Expected a single ATAG memory entry but got %d\n",
133              atagRanges.size());
134    }
135    AtagMem *am = new AtagMem;
136    am->memSize(atagRanges.begin()->size());
137    am->memStart(atagRanges.begin()->start);
138
139    AtagCmdline *ad = new AtagCmdline;
140    ad->cmdline(params()->boot_osflags);
141
142    DPRINTF(Loader, "boot command line %d bytes: %s\n", ad->size() <<2, params()->boot_osflags.c_str());
143
144    AtagNone *an = new AtagNone;
145
146    uint32_t size = ac->size() + am->size() + ad->size() + an->size();
147    uint32_t offset = 0;
148    uint8_t *boot_data = new uint8_t[size << 2];
149
150    offset += ac->copyOut(boot_data + offset);
151    offset += am->copyOut(boot_data + offset);
152    offset += ad->copyOut(boot_data + offset);
153    offset += an->copyOut(boot_data + offset);
154
155    DPRINTF(Loader, "Boot atags was %d bytes in total\n", size << 2);
156    DDUMP(Loader, boot_data, size << 2);
157
158    physProxy.writeBlob(params()->atags_addr, boot_data, size << 2);
159
160    for (int i = 0; i < threadContexts.size(); i++) {
161        threadContexts[i]->setIntReg(0, 0);
162        threadContexts[i]->setIntReg(1, params()->machine_type);
163        threadContexts[i]->setIntReg(2, params()->atags_addr);
164    }
165}
166
167LinuxArmSystem::~LinuxArmSystem()
168{
169    if (uDelaySkipEvent)
170        delete uDelaySkipEvent;
171    if (constUDelaySkipEvent)
172        delete constUDelaySkipEvent;
173}
174
175LinuxArmSystem *
176LinuxArmSystemParams::create()
177{
178    return new LinuxArmSystem(this);
179}
180