2 * Copyright (c) 2002-2005 The Regents of The University of Michigan
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.
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.
32 #include "arch/alpha/ev5.hh"
33 #include "arch/alpha/system.hh"
34 #include "arch/vtophys.hh"
35 #include "base/remote_gdb.hh"
36 #include "base/loader/object_file.hh"
37 #include "base/loader/symtab.hh"
38 #include "base/trace.hh"
39 #include "mem/physical.hh"
40 #include "sim/byteswap.hh"
41 #include "sim/builder.hh"
44 using namespace LittleEndianGuest
;
46 AlphaSystem::AlphaSystem(Params
*p
)
49 consoleSymtab
= new SymbolTable
;
50 palSymtab
= new SymbolTable
;
54 * Load the pal, and console code into memory
57 console
= createObjectFile(params()->console_path
);
59 fatal("Could not load console file %s", params()->console_path
);
62 pal
= createObjectFile(params()->palcode
);
64 fatal("Could not load PALcode file %s", params()->palcode
);
67 // Load program sections into memory
68 pal
->loadSections(&functionalPort
, AlphaISA::LoadAddrMask
);
69 console
->loadSections(&functionalPort
, AlphaISA::LoadAddrMask
);
72 if (!console
->loadGlobalSymbols(consoleSymtab
))
73 panic("could not load console symbols\n");
75 if (!pal
->loadGlobalSymbols(palSymtab
))
76 panic("could not load pal symbols\n");
78 if (!pal
->loadLocalSymbols(palSymtab
))
79 panic("could not load pal symbols\n");
81 if (!console
->loadGlobalSymbols(debugSymbolTable
))
82 panic("could not load console symbols\n");
84 if (!pal
->loadGlobalSymbols(debugSymbolTable
))
85 panic("could not load pal symbols\n");
87 if (!pal
->loadLocalSymbols(debugSymbolTable
))
88 panic("could not load pal symbols\n");
92 consolePanicEvent
= addConsoleFuncEvent
<BreakPCEvent
>("panic");
96 * Copy the osflags (kernel arguments) into the consoles
97 * memory. (Presently Linux does not use the console service
98 * routine to get these command line arguments, but Tru64 and
101 if (consoleSymtab
->findAddress("env_booted_osflags", addr
)) {
102 virtPort
.writeBlob(addr
, (uint8_t*)params()->boot_osflags
.c_str(),
103 strlen(params()->boot_osflags
.c_str()));
107 * Set the hardware reset parameter block system type and revision
108 * information to Tsunami.
110 if (consoleSymtab
->findAddress("m5_rpb", addr
)) {
112 data
= htog(params()->system_type
);
113 virtPort
.write(addr
+0x50, data
);
114 data
= htog(params()->system_rev
);
115 virtPort
.write(addr
+0x58, data
);
117 panic("could not find hwrpb\n");
121 AlphaSystem::~AlphaSystem()
123 delete consoleSymtab
;
127 delete consolePanicEvent
;
132 * This function fixes up addresses that are used to match PCs for
133 * hooking simulator events on to target function executions.
135 * Alpha binaries may have multiple global offset table (GOT)
136 * sections. A function that uses the GOT starts with a
137 * two-instruction prolog which sets the global pointer (gp == r29) to
138 * the appropriate GOT section. The proper gp value is calculated
139 * based on the function address, which must be passed by the caller
140 * in the procedure value register (pv aka t12 == r27). This sequence
141 * looks like the following:
143 * opcode Ra Rb offset
144 * ldah gp,X(pv) 09 29 27 X
145 * lda gp,Y(gp) 08 29 29 Y
147 * for some constant offsets X and Y. The catch is that the linker
148 * (or maybe even the compiler, I'm not sure) may recognize that the
149 * caller and callee are using the same GOT section, making this
150 * prolog redundant, and modify the call target to skip these
151 * instructions. If we check for execution of the first instruction
152 * of a function (the one the symbol points to) to detect when to skip
153 * it, we'll miss all these modified calls. It might work to
154 * unconditionally check for the third instruction, but not all
155 * functions have this prolog, and there's some chance that those
156 * first two instructions could have undesired consequences. So we do
157 * the Right Thing and pattern-match the first two instructions of the
158 * function to decide where to patch.
160 * Eventually this code should be moved into an ISA-specific file.
163 AlphaSystem::fixFuncEventAddr(Addr addr
)
165 // mask for just the opcode, Ra, and Rb fields (not the offset)
166 const uint32_t inst_mask
= 0xffff0000;
167 // ldah gp,X(pv): opcode 9, Ra = 29, Rb = 27
168 const uint32_t gp_ldah_pattern
= (9 << 26) | (29 << 21) | (27 << 16);
169 // lda gp,Y(gp): opcode 8, Ra = 29, rb = 29
170 const uint32_t gp_lda_pattern
= (8 << 26) | (29 << 21) | (29 << 16);
172 uint32_t i1
= virtPort
.read
<uint32_t>(addr
);
173 uint32_t i2
= virtPort
.read
<uint32_t>(addr
+ sizeof(AlphaISA::MachInst
));
175 if ((i1
& inst_mask
) == gp_ldah_pattern
&&
176 (i2
& inst_mask
) == gp_lda_pattern
) {
177 Addr new_addr
= addr
+ 2* sizeof(AlphaISA::MachInst
);
178 DPRINTF(Loader
, "fixFuncEventAddr: %p -> %p", addr
, new_addr
);
187 AlphaSystem::setAlphaAccess(Addr access
)
190 if (consoleSymtab
->findAddress("m5AlphaAccess", addr
)) {
191 virtPort
.write(addr
, htog(EV5::Phys2K0Seg(access
)));
193 panic("could not find m5AlphaAccess\n");
197 AlphaSystem::breakpoint()
199 return remoteGDB
[0]->trap(ALPHA_KENTRY_INT
);
203 AlphaSystem::serialize(std::ostream
&os
)
205 System::serialize(os
);
206 consoleSymtab
->serialize("console_symtab", os
);
207 palSymtab
->serialize("pal_symtab", os
);
212 AlphaSystem::unserialize(Checkpoint
*cp
, const std::string
§ion
)
214 System::unserialize(cp
,section
);
215 consoleSymtab
->unserialize("console_symtab", cp
, section
);
216 palSymtab
->unserialize("pal_symtab", cp
, section
);
220 BEGIN_DECLARE_SIM_OBJECT_PARAMS(AlphaSystem
)
222 Param
<Tick
> boot_cpu_frequency
;
223 SimObjectParam
<PhysicalMemory
*> physmem
;
224 SimpleEnumParam
<System::MemoryMode
> mem_mode
;
226 Param
<std::string
> kernel
;
227 Param
<std::string
> console
;
228 Param
<std::string
> pal
;
230 Param
<std::string
> boot_osflags
;
231 Param
<std::string
> readfile
;
232 Param
<std::string
> symbolfile
;
233 Param
<unsigned int> init_param
;
235 Param
<uint64_t> system_type
;
236 Param
<uint64_t> system_rev
;
238 END_DECLARE_SIM_OBJECT_PARAMS(AlphaSystem
)
240 BEGIN_INIT_SIM_OBJECT_PARAMS(AlphaSystem
)
242 INIT_PARAM(boot_cpu_frequency
, "Frequency of the boot CPU"),
243 INIT_PARAM(physmem
, "phsyical memory"),
244 INIT_ENUM_PARAM(mem_mode
, "Memory Mode, (1=atomic, 2=timing)",
245 System::MemoryModeStrings
),
246 INIT_PARAM(kernel
, "file that contains the kernel code"),
247 INIT_PARAM(console
, "file that contains the console code"),
248 INIT_PARAM(pal
, "file that contains palcode"),
249 INIT_PARAM_DFLT(boot_osflags
, "flags to pass to the kernel during boot",
251 INIT_PARAM_DFLT(readfile
, "file to read startup script from", ""),
252 INIT_PARAM_DFLT(symbolfile
, "file to read symbols from", ""),
253 INIT_PARAM_DFLT(init_param
, "numerical value to pass into simulator", 0),
254 INIT_PARAM_DFLT(system_type
, "Type of system we are emulating", 34),
255 INIT_PARAM_DFLT(system_rev
, "Revision of system we are emulating", 1<<10)
257 END_INIT_SIM_OBJECT_PARAMS(AlphaSystem
)
259 CREATE_SIM_OBJECT(AlphaSystem
)
261 AlphaSystem::Params
*p
= new AlphaSystem::Params
;
262 p
->name
= getInstanceName();
263 p
->boot_cpu_frequency
= boot_cpu_frequency
;
264 p
->physmem
= physmem
;
265 p
->mem_mode
= mem_mode
;
266 p
->kernel_path
= kernel
;
267 p
->console_path
= console
;
269 p
->boot_osflags
= boot_osflags
;
270 p
->init_param
= init_param
;
271 p
->readfile
= readfile
;
272 p
->symbolfile
= symbolfile
;
273 p
->system_type
= system_type
;
274 p
->system_rev
= system_rev
;
275 return new AlphaSystem(p
);
278 REGISTER_SIM_OBJECT("AlphaSystem", AlphaSystem
)