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This file is for register indices, Num* constants, and register types.
copyRegs and copyMiscRegs were moved to utility.hh and utility.cc.
--HG--
rename : src/arch/alpha/regfile.hh => src/arch/alpha/registers.hh
rename : src/arch/arm/regfile.hh => src/arch/arm/registers.hh
rename : src/arch/mips/regfile.hh => src/arch/mips/registers.hh
rename : src/arch/sparc/regfile.hh => src/arch/sparc/registers.hh
rename : src/arch/x86/regfile.hh => src/arch/x86/registers.hh
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This object encapsulates (or will eventually) the identity and characteristics
of the ISA in the CPU.
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--HG--
rename : src/cpu/2bit_local_pred.cc => src/cpu/pred/2bit_local.cc
rename : src/cpu/o3/2bit_local_pred.hh => src/cpu/pred/2bit_local.hh
rename : src/cpu/btb.cc => src/cpu/pred/btb.cc
rename : src/cpu/o3/btb.hh => src/cpu/pred/btb.hh
rename : src/cpu/ras.cc => src/cpu/pred/ras.cc
rename : src/cpu/o3/ras.hh => src/cpu/pred/ras.hh
rename : src/cpu/tournament_pred.cc => src/cpu/pred/tournament.cc
rename : src/cpu/o3/tournament_pred.hh => src/cpu/pred/tournament.hh
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--HG--
rename : src/sim/host.hh => src/base/types.hh
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allow InOrder and O3CPU to be compiled at the same time: need to make branch prediction filed shared by both models
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Changes so that InOrder can work for a non-delay-slot ISA like Alpha. Typically, changes have to do with handling misspeculated branches at different points in pipeline
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stage was not setting the predicted PC correctly or passing that information back to fetch correctly
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For some reason o3 FS init() only called initCPU if the thread state
was Suspended, which was no longer the case. There's no apparent
reason to check, so I whacked the test completely rather than
changing the check to Halted.
The inorder init() was also updated to be symmetric, though the
previous code was just a fancy no-op.
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This situation can arise now on the first fetch cycle after
the last active thread is halted. It seems easy enough to
deal with when it happens rather than trying to avoid it.
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Register indices were not being calculated properly.
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This provides a common initial status for all threads independent
of CPU model (unlike the prior situation where CPUs initialized
threads to inconsistent states).
This mostly matters for SE mode; in FS mode, ISA-specific startupCPU()
methods generally handle boot-time initialization of thread contexts
(since the right thing to do is ISA-dependent).
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Basically merge it in with Halted.
Also had to get rid of a few other functions that
called ThreadContext::deallocate(), including:
- InOrderCPU's setThreadRescheduleCondition.
- ThreadContext::exit(). This function was there to avoid terminating
simulation when one thread out of a multi-thread workload exits, but we
need to find a better (non-cpu-centric) way.
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This generally requires providing a more meaningful name() function for a
class.
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object.
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Some new functions and forward declarations are necessary to make things work
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Make interrupts use the new wakeup method, and pull all of the interrupt
stuff into the cpu base class so that only the wakeup code needs to be updated.
I tried to make wakeup, wakeCPU, and the various other mechanisms for waking
and sleeping a little more sane, but I couldn't understand why the statistics
were changing the way they were. Maybe we'll try again some day.
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There was really no reason that it should be FS only.
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This is to prevent the assertion from firing if you have a large multicore.
Also make sure that it's not compiled in when NDEBUG is defined
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redundancies with threadId() as their replacement.
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the primary identifier for a hardware context should be contextId(). The
concept of threads within a CPU remains, in the form of threadId() because
sometimes you need to know which context within a cpu to manipulate.
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across the subclasses. generally make it so that member data is _cpuId and
accessor functions are cpuId(). The ID val comes from the python (default -1 if
none provided), and if it is -1, the index of cpuList will be given. this has
passed util/regress quick and se.py -n4 and fs.py -n4 as well as standard
switch.
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comments.
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Removing hwrei causes
the instruction after the hwrei to be fetched before the ITB/DTB_CM register is updated in a call pal
call sys and thus the translation fails because the user is attempting to access a super page address.
Minimally, it seems as though some sort of fetch stall or refetch after a hwrei is required. I think
this works currently because the hwrei uses the exec context interface, and the o3 stalls when that occurs.
Additionally, these changes don't update the LOCK register and probably break ll/sc. Both o3 changes were
removed since a great deal of manual patching would be required to only remove the hwrei change.
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x86's Interrupts object.
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For now, there is still a single global event queue, but this is
necessary for making the steps towards a parallelized m5.
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--HG--
rename : src/cpu/o3/sparc/cpu_builder.cc => src/cpu/o3/cpu_builder.cc
rename : src/cpu/o3/sparc/dyn_inst.cc => src/cpu/o3/dyn_inst.cc
rename : src/cpu/o3/sparc/impl.hh => src/cpu/o3/impl.hh
rename : src/cpu/o3/sparc/thread_context.cc => src/cpu/o3/thread_context.cc
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--HG--
rename : src/cpu/o3/dyn_inst.hh => src/cpu/o3/dyn_inst_decl.hh
rename : src/cpu/o3/alpha/dyn_inst_impl.hh => src/cpu/o3/dyn_inst_impl.hh
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Even though we're not incorrect about operator precedence, let's add
some parens in some particularly confusing places to placate GCC 4.3
so that we don't have to turn the warning off. Agreed that this is a
bit of a pain for those users who get the order of operations correct,
but it is likely to prevent bugs in certain cases.
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Fix the logic in the LSQ that determines if there are any stores to
write back. In the commit stage, check for thread specific writebacks
instead of just any writeback.
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Just check CPU's nextPC before and after syscall and if it changes,
update this instruction's nextPC because the syscall must have changed
the nextPC.
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