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 perminately, for but early bootup work
118 // it is helpfulp.
119 kernel->loadGlobalSymbols(kernelSymtab, loadAddrMask);
120 kernel->loadGlobalSymbols(debugSymbolTable, loadAddrMask);
121
122 // Setup boot data structure
123 AtagCore *ac = new AtagCore;
124 ac->flags(1); // read-only
125 ac->pagesize(8192);
126 ac->rootdev(0);
127
128 AtagMem *am = new AtagMem;
129 am->memSize(params()->physmem->size());
130 am->memStart(params()->physmem->start());
131
132 AtagCmdline *ad = new AtagCmdline;
133 ad->cmdline(params()->boot_osflags);
134
135 DPRINTF(Loader, "boot command line %d bytes: %s\n", ad->size() <<2, params()->boot_osflags.c_str());
136
137 AtagNone *an = new AtagNone;
138
139 uint32_t size = ac->size() + am->size() + ad->size() + an->size();
140 uint32_t offset = 0;
141 uint8_t *boot_data = new uint8_t[size << 2];
142
143 offset += ac->copyOut(boot_data + offset);
144 offset += am->copyOut(boot_data + offset);
145 offset += ad->copyOut(boot_data + offset);
146 offset += an->copyOut(boot_data + offset);
147
148 DPRINTF(Loader, "Boot atags was %d bytes in total\n", size << 2);
149 DDUMP(Loader, boot_data, size << 2);
150
151 physProxy.writeBlob(params()->atags_addr, boot_data, size << 2);
152
153 for (int i = 0; i < threadContexts.size(); i++) {
154 threadContexts[i]->setIntReg(0, 0);
155 threadContexts[i]->setIntReg(1, params()->machine_type);
156 threadContexts[i]->setIntReg(2, params()->atags_addr);
157 }
158}
159
160LinuxArmSystem::~LinuxArmSystem()
161{
162 if (uDelaySkipEvent)
163 delete uDelaySkipEvent;
164 if (constUDelaySkipEvent)
165 delete constUDelaySkipEvent;
166}
167
168LinuxArmSystem *
169LinuxArmSystemParams::create()
170{
171 return new LinuxArmSystem(this);
172}