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,
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24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #include "arch/alpha/system.hh"
30 #include "arch/vtophys.hh"
31 #include "base/remote_gdb.hh"
32 #include "base/loader/object_file.hh"
33 #include "base/loader/symtab.hh"
34 #include "base/trace.hh"
35 #include "mem/functional/memory_control.hh"
36 #include "mem/functional/physical.hh"
37 #include "sim/byteswap.hh"
38 #include "sim/builder.hh"
40 using namespace LittleEndianGuest
;
42 AlphaSystem::AlphaSystem(Params
*p
)
45 consoleSymtab
= new SymbolTable
;
46 palSymtab
= new SymbolTable
;
50 * Load the pal, and console code into memory
53 console
= createObjectFile(params()->console_path
);
55 fatal("Could not load console file %s", params()->console_path
);
58 pal
= createObjectFile(params()->palcode
);
60 fatal("Could not load PALcode file %s", params()->palcode
);
63 // Load program sections into memory
64 pal
->loadSections(physmem
, true);
65 console
->loadSections(physmem
, true);
68 if (!console
->loadGlobalSymbols(consoleSymtab
))
69 panic("could not load console symbols\n");
71 if (!pal
->loadGlobalSymbols(palSymtab
))
72 panic("could not load pal symbols\n");
74 if (!pal
->loadLocalSymbols(palSymtab
))
75 panic("could not load pal symbols\n");
77 if (!console
->loadGlobalSymbols(debugSymbolTable
))
78 panic("could not load console symbols\n");
80 if (!pal
->loadGlobalSymbols(debugSymbolTable
))
81 panic("could not load pal symbols\n");
83 if (!pal
->loadLocalSymbols(debugSymbolTable
))
84 panic("could not load pal symbols\n");
88 consolePanicEvent
= addConsoleFuncEvent
<BreakPCEvent
>("panic");
92 * Copy the osflags (kernel arguments) into the consoles
93 * memory. (Presently Linux does not use the console service
94 * routine to get these command line arguments, but Tru64 and
97 if (consoleSymtab
->findAddress("env_booted_osflags", addr
)) {
98 Addr paddr
= vtophys(physmem
, addr
);
99 char *osflags
= (char *)physmem
->dma_addr(paddr
, sizeof(uint32_t));
102 strcpy(osflags
, params()->boot_osflags
.c_str());
106 * Set the hardware reset parameter block system type and revision
107 * information to Tsunami.
109 if (consoleSymtab
->findAddress("m5_rpb", addr
)) {
110 Addr paddr
= vtophys(physmem
, addr
);
111 char *hwrpb
= (char *)physmem
->dma_addr(paddr
, sizeof(uint64_t));
114 panic("could not translate hwrpb addr\n");
116 *(uint64_t*)(hwrpb
+0x50) = htog(params()->system_type
);
117 *(uint64_t*)(hwrpb
+0x58) = htog(params()->system_rev
);
119 panic("could not find hwrpb\n");
123 AlphaSystem::~AlphaSystem()
125 delete consoleSymtab
;
129 delete consolePanicEvent
;
134 * This function fixes up addresses that are used to match PCs for
135 * hooking simulator events on to target function executions.
137 * Alpha binaries may have multiple global offset table (GOT)
138 * sections. A function that uses the GOT starts with a
139 * two-instruction prolog which sets the global pointer (gp == r29) to
140 * the appropriate GOT section. The proper gp value is calculated
141 * based on the function address, which must be passed by the caller
142 * in the procedure value register (pv aka t12 == r27). This sequence
143 * looks like the following:
145 * opcode Ra Rb offset
146 * ldah gp,X(pv) 09 29 27 X
147 * lda gp,Y(gp) 08 29 29 Y
149 * for some constant offsets X and Y. The catch is that the linker
150 * (or maybe even the compiler, I'm not sure) may recognize that the
151 * caller and callee are using the same GOT section, making this
152 * prolog redundant, and modify the call target to skip these
153 * instructions. If we check for execution of the first instruction
154 * of a function (the one the symbol points to) to detect when to skip
155 * it, we'll miss all these modified calls. It might work to
156 * unconditionally check for the third instruction, but not all
157 * functions have this prolog, and there's some chance that those
158 * first two instructions could have undesired consequences. So we do
159 * the Right Thing and pattern-match the first two instructions of the
160 * function to decide where to patch.
162 * Eventually this code should be moved into an ISA-specific file.
165 AlphaSystem::fixFuncEventAddr(Addr addr
)
167 // mask for just the opcode, Ra, and Rb fields (not the offset)
168 const uint32_t inst_mask
= 0xffff0000;
169 // ldah gp,X(pv): opcode 9, Ra = 29, Rb = 27
170 const uint32_t gp_ldah_pattern
= (9 << 26) | (29 << 21) | (27 << 16);
171 // lda gp,Y(gp): opcode 8, Ra = 29, rb = 29
172 const uint32_t gp_lda_pattern
= (8 << 26) | (29 << 21) | (29 << 16);
174 const int sz
= sizeof(uint32_t);
176 Addr paddr
= vtophys(physmem
, addr
);
177 uint32_t i1
= *(uint32_t *)physmem
->dma_addr(paddr
, sz
);
178 uint32_t i2
= *(uint32_t *)physmem
->dma_addr(paddr
+sz
, sz
);
180 if ((i1
& inst_mask
) == gp_ldah_pattern
&&
181 (i2
& inst_mask
) == gp_lda_pattern
) {
182 Addr new_addr
= addr
+ 2*sz
;
183 DPRINTF(Loader
, "fixFuncEventAddr: %p -> %p", addr
, new_addr
);
192 AlphaSystem::setAlphaAccess(Addr access
)
195 if (consoleSymtab
->findAddress("m5AlphaAccess", addr
)) {
196 Addr paddr
= vtophys(physmem
, addr
);
197 uint64_t *m5AlphaAccess
=
198 (uint64_t *)physmem
->dma_addr(paddr
, sizeof(uint64_t));
201 panic("could not translate m5AlphaAccess addr\n");
203 *m5AlphaAccess
= htog(EV5::Phys2K0Seg(access
));
205 panic("could not find m5AlphaAccess\n");
209 AlphaSystem::breakpoint()
211 return remoteGDB
[0]->trap(ALPHA_KENTRY_INT
);
215 AlphaSystem::serialize(std::ostream
&os
)
217 System::serialize(os
);
218 consoleSymtab
->serialize("console_symtab", os
);
219 palSymtab
->serialize("pal_symtab", os
);
224 AlphaSystem::unserialize(Checkpoint
*cp
, const std::string
§ion
)
226 System::unserialize(cp
,section
);
227 consoleSymtab
->unserialize("console_symtab", cp
, section
);
228 palSymtab
->unserialize("pal_symtab", cp
, section
);
232 BEGIN_DECLARE_SIM_OBJECT_PARAMS(AlphaSystem
)
234 Param
<Tick
> boot_cpu_frequency
;
235 SimObjectParam
<MemoryController
*> memctrl
;
236 SimObjectParam
<PhysicalMemory
*> physmem
;
238 Param
<std::string
> kernel
;
239 Param
<std::string
> console
;
240 Param
<std::string
> pal
;
242 Param
<std::string
> boot_osflags
;
243 Param
<std::string
> readfile
;
244 Param
<unsigned int> init_param
;
246 Param
<uint64_t> system_type
;
247 Param
<uint64_t> system_rev
;
250 VectorParam
<std::string
> binned_fns
;
253 END_DECLARE_SIM_OBJECT_PARAMS(AlphaSystem
)
255 BEGIN_INIT_SIM_OBJECT_PARAMS(AlphaSystem
)
257 INIT_PARAM(boot_cpu_frequency
, "Frequency of the boot CPU"),
258 INIT_PARAM(memctrl
, "memory controller"),
259 INIT_PARAM(physmem
, "phsyical memory"),
260 INIT_PARAM(kernel
, "file that contains the kernel code"),
261 INIT_PARAM(console
, "file that contains the console code"),
262 INIT_PARAM(pal
, "file that contains palcode"),
263 INIT_PARAM_DFLT(boot_osflags
, "flags to pass to the kernel during boot",
265 INIT_PARAM_DFLT(readfile
, "file to read startup script from", ""),
266 INIT_PARAM_DFLT(init_param
, "numerical value to pass into simulator", 0),
267 INIT_PARAM_DFLT(system_type
, "Type of system we are emulating", 34),
268 INIT_PARAM_DFLT(system_rev
, "Revision of system we are emulating", 1<<10),
269 INIT_PARAM_DFLT(bin
, "is this system to be binned", false),
270 INIT_PARAM(binned_fns
, "functions to be broken down and binned"),
271 INIT_PARAM_DFLT(bin_int
, "is interrupt code binned seperately?", true)
273 END_INIT_SIM_OBJECT_PARAMS(AlphaSystem
)
275 CREATE_SIM_OBJECT(AlphaSystem
)
277 AlphaSystem::Params
*p
= new AlphaSystem::Params
;
278 p
->name
= getInstanceName();
279 p
->boot_cpu_frequency
= boot_cpu_frequency
;
280 p
->memctrl
= memctrl
;
281 p
->physmem
= physmem
;
282 p
->kernel_path
= kernel
;
283 p
->console_path
= console
;
285 p
->boot_osflags
= boot_osflags
;
286 p
->init_param
= init_param
;
287 p
->readfile
= readfile
;
288 p
->system_type
= system_type
;
289 p
->system_rev
= system_rev
;
291 p
->binned_fns
= binned_fns
;
292 p
->bin_int
= bin_int
;
293 return new AlphaSystem(p
);
296 REGISTER_SIM_OBJECT("AlphaSystem", AlphaSystem
)