base_config.py revision 11156 
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35#
36# Authors: Andreas Sandberg
37#          Andreas Hansson
38
39from abc import ABCMeta, abstractmethod
40import m5
41from m5.objects import *
42from m5.proxy import *
43m5.util.addToPath('../configs/common')
44import FSConfig
45from Caches import *
46
47_have_kvm_support = 'BaseKvmCPU' in globals()
48
49class BaseSystem(object):
50    """Base system builder.
51
52    This class provides some basic functionality for creating an ARM
53    system with the usual peripherals (caches, GIC, etc.). It allows
54    customization by defining separate methods for different parts of
55    the initialization process.
56    """
57
58    __metaclass__ = ABCMeta
59
60    def __init__(self, mem_mode='timing', mem_class=SimpleMemory,
61                 cpu_class=TimingSimpleCPU, num_cpus=1, num_threads=1,
62                 checker=False,
63                 mem_size=None):
64        """Initialize a simple base system.
65
66        Keyword Arguments:
67          mem_mode -- String describing the memory mode (timing or atomic)
68          mem_class -- Memory controller class to use
69          cpu_class -- CPU class to use
70          num_cpus -- Number of CPUs to instantiate
71          checker -- Set to True to add checker CPUs
72          mem_size -- Override the default memory size
73        """
74        self.mem_mode = mem_mode
75        self.mem_class = mem_class
76        self.cpu_class = cpu_class
77        self.num_cpus = num_cpus
78        self.num_threads = num_threads
79        self.checker = checker
80
81    def create_cpus(self, cpu_clk_domain):
82        """Return a list of CPU objects to add to a system."""
83        cpus = [ self.cpu_class(clk_domain=cpu_clk_domain,
84                                numThreads=self.num_threads,
85                                cpu_id=i)
86                 for i in range(self.num_cpus) ]
87        if self.checker:
88            for c in cpus:
89                c.addCheckerCpu()
90        return cpus
91
92    def create_caches_private(self, cpu):
93        """Add private caches to a CPU.
94
95        Arguments:
96          cpu -- CPU instance to work on.
97        """
98        cpu.addPrivateSplitL1Caches(L1_ICache(size='32kB', assoc=1),
99                                    L1_DCache(size='32kB', assoc=4))
100
101    def create_caches_shared(self, system):
102        """Add shared caches to a system.
103
104        Arguments:
105          system -- System to work on.
106
107        Returns:
108          A bus that CPUs should use to connect to the shared cache.
109        """
110        system.toL2Bus = L2XBar(clk_domain=system.cpu_clk_domain)
111        system.l2c = L2Cache(clk_domain=system.cpu_clk_domain,
112                             size='4MB', assoc=8)
113        system.l2c.cpu_side = system.toL2Bus.master
114        system.l2c.mem_side = system.membus.slave
115        return system.toL2Bus
116
117    def init_cpu(self, system, cpu, sha_bus):
118        """Initialize a CPU.
119
120        Arguments:
121          system -- System to work on.
122          cpu -- CPU to initialize.
123        """
124        if not cpu.switched_out:
125            self.create_caches_private(cpu)
126            cpu.createInterruptController()
127            cpu.connectAllPorts(sha_bus if sha_bus != None else system.membus,
128                                system.membus)
129
130    def init_kvm(self, system):
131        """Do KVM-specific system initialization.
132
133        Arguments:
134          system -- System to work on.
135        """
136        system.vm = KvmVM()
137
138    def init_system(self, system):
139        """Initialize a system.
140
141        Arguments:
142          system -- System to initialize.
143        """
144        self.create_clk_src(system)
145        system.cpu = self.create_cpus(system.cpu_clk_domain)
146
147        if _have_kvm_support and \
148                any([isinstance(c, BaseKvmCPU) for c in system.cpu]):
149            self.init_kvm(system)
150
151        sha_bus = self.create_caches_shared(system)
152        for cpu in system.cpu:
153            self.init_cpu(system, cpu, sha_bus)
154
155    def create_clk_src(self,system):
156        # Create system clock domain. This provides clock value to every
157        # clocked object that lies beneath it unless explicitly overwritten
158        # by a different clock domain.
159        system.voltage_domain = VoltageDomain()
160        system.clk_domain = SrcClockDomain(clock = '1GHz',
161                                           voltage_domain =
162                                           system.voltage_domain)
163
164        # Create a seperate clock domain for components that should
165        # run at CPUs frequency
166        system.cpu_clk_domain = SrcClockDomain(clock = '2GHz',
167                                               voltage_domain =
168                                               system.voltage_domain)
169
170    @abstractmethod
171    def create_system(self):
172        """Create an return an initialized system."""
173        pass
174
175    @abstractmethod
176    def create_root(self):
177        """Create and return a simulation root using the system
178        defined by this class."""
179        pass
180
181class BaseSESystem(BaseSystem):
182    """Basic syscall-emulation builder."""
183
184    def __init__(self, **kwargs):
185        BaseSystem.__init__(self, **kwargs)
186
187    def init_system(self, system):
188        BaseSystem.init_system(self, system)
189
190    def create_system(self):
191        system = System(physmem = self.mem_class(),
192                        membus = SystemXBar(),
193                        mem_mode = self.mem_mode,
194                        multi_thread = (self.num_threads > 1))
195        system.system_port = system.membus.slave
196        system.physmem.port = system.membus.master
197        self.init_system(system)
198        return system
199
200    def create_root(self):
201        system = self.create_system()
202        m5.ticks.setGlobalFrequency('1THz')
203        return Root(full_system=False, system=system)
204
205class BaseSESystemUniprocessor(BaseSESystem):
206    """Basic syscall-emulation builder for uniprocessor systems.
207
208    Note: This class is only really needed to provide backwards
209    compatibility in existing test cases.
210    """
211
212    def __init__(self, **kwargs):
213        BaseSESystem.__init__(self, **kwargs)
214
215    def create_caches_private(self, cpu):
216        # The atomic SE configurations do not use caches
217        if self.mem_mode == "timing":
218            # @todo We might want to revisit these rather enthusiastic L1 sizes
219            cpu.addTwoLevelCacheHierarchy(L1_ICache(size='128kB'),
220                                          L1_DCache(size='256kB'),
221                                          L2Cache(size='2MB'))
222
223    def create_caches_shared(self, system):
224        return None
225
226class BaseFSSystem(BaseSystem):
227    """Basic full system builder."""
228
229    def __init__(self, **kwargs):
230        BaseSystem.__init__(self, **kwargs)
231
232    def init_system(self, system):
233        BaseSystem.init_system(self, system)
234
235        # create the memory controllers and connect them, stick with
236        # the physmem name to avoid bumping all the reference stats
237        system.physmem = [self.mem_class(range = r)
238                          for r in system.mem_ranges]
239        for i in xrange(len(system.physmem)):
240            system.physmem[i].port = system.membus.master
241
242        # create the iocache, which by default runs at the system clock
243        system.iocache = IOCache(addr_ranges=system.mem_ranges)
244        system.iocache.cpu_side = system.iobus.master
245        system.iocache.mem_side = system.membus.slave
246
247    def create_root(self):
248        system = self.create_system()
249        m5.ticks.setGlobalFrequency('1THz')
250        return Root(full_system=True, system=system)
251
252class BaseFSSystemUniprocessor(BaseFSSystem):
253    """Basic full system builder for uniprocessor systems.
254
255    Note: This class is only really needed to provide backwards
256    compatibility in existing test cases.
257    """
258
259    def __init__(self, **kwargs):
260        BaseFSSystem.__init__(self, **kwargs)
261
262    def create_caches_private(self, cpu):
263        cpu.addTwoLevelCacheHierarchy(L1_ICache(size='32kB', assoc=1),
264                                      L1_DCache(size='32kB', assoc=4),
265                                      L2Cache(size='4MB', assoc=8))
266
267    def create_caches_shared(self, system):
268        return None
269
270class BaseFSSwitcheroo(BaseFSSystem):
271    """Uniprocessor system prepared for CPU switching"""
272
273    def __init__(self, cpu_classes, **kwargs):
274        BaseFSSystem.__init__(self, **kwargs)
275        self.cpu_classes = tuple(cpu_classes)
276
277    def create_cpus(self, cpu_clk_domain):
278        cpus = [ cclass(clk_domain = cpu_clk_domain,
279                        cpu_id=0,
280                        switched_out=True)
281                 for cclass in self.cpu_classes ]
282        cpus[0].switched_out = False
283        return cpus
284