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 Addr addr = 0;
126 // Check if the kernel image has a symbol that tells us it supports
127 // device trees.
128 bool kernel_has_fdt_support =
129 kernelSymtab->findAddress("unflatten_device_tree", addr);
130 bool dtb_file_specified = params()->dtb_filename != "";
131
132 if (kernel_has_fdt_support && dtb_file_specified) {
133 // Kernel supports flattened device tree and dtb file specified.
134 // Using Device Tree Blob to describe system configuration.
135 inform("Loading DTB file: %s\n", params()->dtb_filename);
136
137 ObjectFile *dtb_file = createObjectFile(params()->dtb_filename, true);
138 if (!dtb_file) {
139 fatal("couldn't load DTB file: %s\n", params()->dtb_filename);
140 }
141 dtb_file->setTextBase(params()->atags_addr);
142 dtb_file->loadSections(physProxy);
143 delete dtb_file;
144 } else {
145 // Using ATAGS
146 // Warn if the kernel supports FDT and we haven't specified one
147 if (kernel_has_fdt_support) {
148 assert(!dtb_file_specified);
149 warn("Kernel supports device tree, but no DTB file specified\n");
150 }
151 // Warn if the kernel doesn't support FDT and we have specified one
152 if (dtb_file_specified) {
153 assert(!kernel_has_fdt_support);
154 warn("DTB file specified, but no device tree support in kernel\n");
155 }
156
| 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 Addr addr = 0;
126 // Check if the kernel image has a symbol that tells us it supports
127 // device trees.
128 bool kernel_has_fdt_support =
129 kernelSymtab->findAddress("unflatten_device_tree", addr);
130 bool dtb_file_specified = params()->dtb_filename != "";
131
132 if (kernel_has_fdt_support && dtb_file_specified) {
133 // Kernel supports flattened device tree and dtb file specified.
134 // Using Device Tree Blob to describe system configuration.
135 inform("Loading DTB file: %s\n", params()->dtb_filename);
136
137 ObjectFile *dtb_file = createObjectFile(params()->dtb_filename, true);
138 if (!dtb_file) {
139 fatal("couldn't load DTB file: %s\n", params()->dtb_filename);
140 }
141 dtb_file->setTextBase(params()->atags_addr);
142 dtb_file->loadSections(physProxy);
143 delete dtb_file;
144 } else {
145 // Using ATAGS
146 // Warn if the kernel supports FDT and we haven't specified one
147 if (kernel_has_fdt_support) {
148 assert(!dtb_file_specified);
149 warn("Kernel supports device tree, but no DTB file specified\n");
150 }
151 // Warn if the kernel doesn't support FDT and we have specified one
152 if (dtb_file_specified) {
153 assert(!kernel_has_fdt_support);
154 warn("DTB file specified, but no device tree support in kernel\n");
155 }
156
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