gem5.git
13 years agomerged with Ali X11 patch
Brad Beckmann [Thu, 10 Feb 2011 21:31:52 +0000 (13:31 -0800)]
merged with Ali X11 patch

13 years agoMOESI_hammer: fixed wakeup for SS->S transistion
Brad Beckmann [Thu, 10 Feb 2011 21:28:23 +0000 (13:28 -0800)]
MOESI_hammer: fixed wakeup for SS->S transistion

13 years agoExt: Add X11 keysym header files to ext directory.
Ali Saidi [Thu, 10 Feb 2011 04:27:37 +0000 (22:27 -0600)]
Ext: Add X11 keysym header files to ext directory.

13 years agoruby: removed duplicate make response call
Brad Beckmann [Thu, 10 Feb 2011 00:02:09 +0000 (16:02 -0800)]
ruby: removed duplicate make response call

13 years agoregess: protocol regression tester updates
Brad Beckmann [Wed, 9 Feb 2011 02:07:54 +0000 (18:07 -0800)]
regess: protocol regression tester updates

13 years agomemtest: due to contention increase, increased deadlock threshold
Brad Beckmann [Tue, 8 Feb 2011 23:53:33 +0000 (15:53 -0800)]
memtest: due to contention increase, increased deadlock threshold

13 years agoconfig: fixed minor bug connecting dma devices to ruby
Brad Beckmann [Tue, 8 Feb 2011 23:52:44 +0000 (15:52 -0800)]
config: fixed minor bug connecting dma devices to ruby

13 years agoMESI CMP: Unset TBE pointer in L2 cache controller
Nilay Vaish [Tue, 8 Feb 2011 13:47:02 +0000 (07:47 -0600)]
MESI CMP: Unset TBE pointer in L2 cache controller
The TBE pointer in the MESI CMP implementation was not being set to NULL
when the TBE is deallocated. This resulted in segmentation fault on testing
the protocol when the ProtocolTrace was switched on.

13 years agoStats: Re update stats.
Gabe Black [Tue, 8 Feb 2011 03:23:13 +0000 (19:23 -0800)]
Stats: Re update stats.

13 years agoStats: Back out broken update.
Gabe Black [Tue, 8 Feb 2011 03:23:11 +0000 (19:23 -0800)]
Stats: Back out broken update.

13 years agoX86: Obey the wp bit of CR0.
Tim Harris [Mon, 7 Feb 2011 23:18:52 +0000 (15:18 -0800)]
X86: Obey the wp bit of CR0.

If cr0.wp ("write protect" bit) is clear then do not generate page faults when
writing to write-protected pages in kernel mode.

13 years agoX86: Use all 64 bits of the lstar register in the SYSCALL_64 macroop.
Tim Harris [Mon, 7 Feb 2011 23:16:27 +0000 (15:16 -0800)]
X86: Use all 64 bits of the lstar register in the SYSCALL_64 macroop.

During SYSCALL_64, use dataSize=8 when handling new rip (ref
http://www.intel.com/Assets/PDF/manual/253668.pdf 5.8.8 IA32_LSTAR is a 64-bit
address)

13 years agoX86: Fix JMP_FAR_I to unpack a far pointer correctly.
Tim Harris [Mon, 7 Feb 2011 23:12:59 +0000 (15:12 -0800)]
X86: Fix JMP_FAR_I to unpack a far pointer correctly.

JMP_FAR_I was unpacking its far pointer operand using sll instead of srl like
it should, and also putting the components in the wrong registers for use by
other microcode.

13 years agoX86: Read the LDT/GDT at CPL0 when executing an iret.
Tim Harris [Mon, 7 Feb 2011 23:05:28 +0000 (15:05 -0800)]
X86: Read the LDT/GDT at CPL0 when executing an iret.

During iret access LDT/GDT at CPL0 rather than after transition to user mode
(if I'm reading the Intel IA-64 architecture spec correctly, the contents of
the descriptor table are read before the CPL is updated).

13 years agoOrion: Replace printf() with fatal()
Nilay Vaish [Mon, 7 Feb 2011 18:42:23 +0000 (12:42 -0600)]
Orion: Replace printf() with fatal()
The code for Orion 2.0 makes use of printf() at several places where there as
an error in configuration of the model. These have been replaced with fatal().

13 years agoruby: add stdio header in SRAM.hh
Korey Sewell [Mon, 7 Feb 2011 17:19:46 +0000 (12:19 -0500)]
ruby: add stdio header in SRAM.hh
missing header file caused RUBY_FS to not compile

13 years agoX86: Add stats for the new x86 fs regressions.
Gabe Black [Mon, 7 Feb 2011 09:23:16 +0000 (01:23 -0800)]
X86: Add stats for the new x86 fs regressions.

13 years agoX86: Add scripts to support X86 FS configurations in the regressions.
Gabe Black [Mon, 7 Feb 2011 09:23:02 +0000 (01:23 -0800)]
X86: Add scripts to support X86 FS configurations in the regressions.

13 years agoX86, Config: Move the setting of work count options to a separate function.
Gabe Black [Mon, 7 Feb 2011 09:22:15 +0000 (01:22 -0800)]
X86, Config: Move the setting of work count options to a separate function.

This way things that don't care about work count options and/or aren't called
by something that has those command line options set up doesn't have to build
a fake object to carry in inert values.

13 years agoX86: Fix compiling vtophys.cc
Gabe Black [Mon, 7 Feb 2011 09:21:21 +0000 (01:21 -0800)]
X86: Fix compiling vtophys.cc

13 years agoregress: Regression Tester output updates
Brad Beckmann [Mon, 7 Feb 2011 06:14:23 +0000 (22:14 -0800)]
regress: Regression Tester output updates

13 years agoruby: support to stallAndWait the mandatory queue
Brad Beckmann [Mon, 7 Feb 2011 06:14:19 +0000 (22:14 -0800)]
ruby: support to stallAndWait the mandatory queue

By stalling and waiting the mandatory queue instead of recycling it, one can
ensure that no incoming messages are starved when the mandatory queue puts
signficant of pressure on the L1 cache controller (i.e. the ruby memtester).

--HG--
rename : src/mem/slicc/ast/WakeUpDependentsStatementAST.py => src/mem/slicc/ast/WakeUpAllDependentsStatementAST.py

13 years agoruby: minor fix to deadlock panic message
Brad Beckmann [Mon, 7 Feb 2011 06:14:19 +0000 (22:14 -0800)]
ruby: minor fix to deadlock panic message

13 years agoboot: script that creates a checkpoint after Linux boot up
Brad Beckmann [Mon, 7 Feb 2011 06:14:19 +0000 (22:14 -0800)]
boot: script that creates a checkpoint after Linux boot up

13 years agogarnet: Split network power in ruby.stats
Joel Hestness [Mon, 7 Feb 2011 06:14:19 +0000 (22:14 -0800)]
garnet: Split network power in ruby.stats

Split out dynamic and static power numbers for printing to ruby.stats

13 years agoMOESI_hammer: fixed dir bug counting received acks
Brad Beckmann [Mon, 7 Feb 2011 06:14:19 +0000 (22:14 -0800)]
MOESI_hammer: fixed dir bug counting received acks

13 years agoruby: numa bit fix for sparse memory
Brad Beckmann [Mon, 7 Feb 2011 06:14:19 +0000 (22:14 -0800)]
ruby: numa bit fix for sparse memory

13 years agoMOESI_CMP_token: removed unused message fields
Tushar Krishna [Mon, 7 Feb 2011 06:14:19 +0000 (22:14 -0800)]
MOESI_CMP_token: removed unused message fields

13 years agomem: Added support for Null data packet
Brad Beckmann [Mon, 7 Feb 2011 06:14:19 +0000 (22:14 -0800)]
mem: Added support for Null data packet

The packet now identifies whether static or dynamic data has been allocated and
is used by Ruby to determine whehter to copy the data pointer into the ruby
request.  Subsequently, Ruby can be told not to update phys memory when
receiving packets.

13 years agom5: added work completed monitoring support
Brad Beckmann [Mon, 7 Feb 2011 06:14:19 +0000 (22:14 -0800)]
m5: added work completed monitoring support

13 years agodev: fixed bugs to extend interrupt capability beyond 15 cores
Brad Beckmann [Mon, 7 Feb 2011 06:14:18 +0000 (22:14 -0800)]
dev: fixed bugs to extend interrupt capability beyond 15 cores

13 years agox86: Timing support for pagetable walker
Joel Hestness [Mon, 7 Feb 2011 06:14:18 +0000 (22:14 -0800)]
x86: Timing support for pagetable walker

Move page table walker state to its own object type, and make the
walker instantiate state for each outstanding walk. By storing the
states in a queue, the walker is able to handle multiple outstanding
timing requests. Note that functional walks use separate state
elements.

13 years agoTimingSimpleCPU: split data sender state fix
Joel Hestness [Mon, 7 Feb 2011 06:14:18 +0000 (22:14 -0800)]
TimingSimpleCPU: split data sender state fix

In sendSplitData, keep a pointer to the senderState that may be updated after
the call to handle*Packet. This way, if the receiver updates the packet
senderState, it can still be accessed in sendSplitData.

13 years agoruby: Fix RubyPort to properly handle retrys
Brad Beckmann [Mon, 7 Feb 2011 06:14:18 +0000 (22:14 -0800)]
ruby: Fix RubyPort to properly handle retrys

13 years agoRuby: Fix to return cache block size to CPU for split data transfers
Joel Hestness [Mon, 7 Feb 2011 06:14:18 +0000 (22:14 -0800)]
Ruby: Fix to return cache block size to CPU for split data transfers

13 years agoRuby: Add support for locked memory accesses in X86_FS
Joel Hestness [Mon, 7 Feb 2011 06:14:18 +0000 (22:14 -0800)]
Ruby: Add support for locked memory accesses in X86_FS

13 years agoRuby: Update the Ruby request type names for LL/SC
Joel Hestness [Mon, 7 Feb 2011 06:14:18 +0000 (22:14 -0800)]
Ruby: Update the Ruby request type names for LL/SC

13 years agoruby: Assert for x86 misaligned access
Brad Beckmann [Mon, 7 Feb 2011 06:14:18 +0000 (22:14 -0800)]
ruby: Assert for x86 misaligned access

This patch ensures only aligned access are passed to ruby and includes a fix
to the DPRINTF address print.

13 years agoruby: x86 fs config support
Brad Beckmann [Mon, 7 Feb 2011 06:14:18 +0000 (22:14 -0800)]
ruby: x86 fs config support

13 years agoMOESI_hammer: Added full-bit directory support
Brad Beckmann [Mon, 7 Feb 2011 06:14:18 +0000 (22:14 -0800)]
MOESI_hammer: Added full-bit directory support

13 years agox86: Add checkpointing capability to devices
Joel Hestness [Mon, 7 Feb 2011 06:14:18 +0000 (22:14 -0800)]
x86: Add checkpointing capability to devices

Add checkpointing capability to the Intel 8254 timer, CMOS, I8042,
PS2 Keyboard and Mouse, I82094AA, I8237, I8254, I8259, and speaker
devices

13 years agox86: Add checkpointing capability to arch components
Joel Hestness [Mon, 7 Feb 2011 06:14:17 +0000 (22:14 -0800)]
x86: Add checkpointing capability to arch components

Add checkpointing capability to the x86 interrupt device and the TLBs

13 years agox86: implements vtophys
Joel Hestness [Mon, 7 Feb 2011 06:14:17 +0000 (22:14 -0800)]
x86: implements vtophys

Calls walker to look up virt. to phys. page mapping

13 years agoIntDev: packet latency fix
Joel Hestness [Mon, 7 Feb 2011 06:14:17 +0000 (22:14 -0800)]
IntDev: packet latency fix

The x86 local apic now includes a separate latency parameter for interrupts.

13 years agoMessagePort: implement the virtual recvTiming function to avoid double pkt delete
Joel Hestness [Mon, 7 Feb 2011 06:14:17 +0000 (22:14 -0800)]
MessagePort: implement the virtual recvTiming function to avoid double pkt delete

Double packet delete problem is due to an interrupt device deleting a packet that the SimpleTimingPort also deletes. Since MessagePort descends from SimpleTimingPort, simply reimplement the failing code from SimpleTimingPort: recvTiming.

13 years agoMOESI_hammer: trigge queue fix.
Joel Hestness [Mon, 7 Feb 2011 06:14:17 +0000 (22:14 -0800)]
MOESI_hammer: trigge queue fix.

13 years agomcpat: Adds McPAT performance counters
Joel Hestness [Mon, 7 Feb 2011 06:14:17 +0000 (22:14 -0800)]
mcpat: Adds McPAT performance counters

Updated patches from Rick Strong's set that modify performance counters for
McPAT

13 years agogarnet: added orion2.0 for network power calculation
Tushar Krishna [Mon, 7 Feb 2011 06:14:17 +0000 (22:14 -0800)]
garnet: added orion2.0 for network power calculation

13 years agogarnet: separate data and ctrl VCs
Tushar Krishna [Mon, 7 Feb 2011 06:14:16 +0000 (22:14 -0800)]
garnet: separate data and ctrl VCs

Separate data VCs and ctrl VCs in garnet, as ctrl VCs have 1 buffer per VC,
while data VCs have > 1 buffers per VC. This is for correct power estimations.

13 years agox86: set IsCondControl flag for the appropriate microops
Brad Beckmann [Mon, 7 Feb 2011 06:14:16 +0000 (22:14 -0800)]
x86: set IsCondControl flag for the appropriate microops

13 years agoX86: Add o3 regressions in SE mode.
Gabe Black [Sat, 5 Feb 2011 08:16:09 +0000 (00:16 -0800)]
X86: Add o3 regressions in SE mode.

Exclude bzip2 for now. It works, it just takes too long to run.

13 years agoX86: Update ruby stats for stupd change.
Gabe Black [Fri, 4 Feb 2011 11:47:23 +0000 (03:47 -0800)]
X86: Update ruby stats for stupd change.

13 years agoFault: Forgot to refresh to grab these header guard updates.
Gabe Black [Fri, 4 Feb 2011 06:07:34 +0000 (22:07 -0800)]
Fault: Forgot to refresh to grab these header guard updates.

13 years agoimported patch regression_updates
Korey Sewell [Fri, 4 Feb 2011 05:09:22 +0000 (00:09 -0500)]
imported patch regression_updates

13 years agoinorder: fault handling
Korey Sewell [Fri, 4 Feb 2011 05:09:20 +0000 (00:09 -0500)]
inorder: fault handling
Maintain all information about an instruction's fault in the DynInst object rather
than any cpu-request object. Also, if there is a fault during the execution stage
then just save the fault inside the instruction and trap once the instruction
tries to graduate

13 years agoinorder: pcstate and delay slots bug
Korey Sewell [Fri, 4 Feb 2011 05:09:19 +0000 (00:09 -0500)]
inorder: pcstate and delay slots bug
not taken delay slots were not being advanced correctly to pc+8, so for those ISAs
we 'advance()' the pcstate one more time for the desired effect

13 years agoinorder: add a fetch buffer to fetch unit
Korey Sewell [Fri, 4 Feb 2011 05:08:22 +0000 (00:08 -0500)]
inorder: add a fetch buffer to fetch unit
Give fetch unit it's own parameterizable fetch buffer to read from. Very inefficient
(architecturally and in simulation) to continually fetch at the granularity of the
wordsize. As expected, the number of fetch memory requests drops dramatically

13 years agoinorder: overload find-req fn
Korey Sewell [Fri, 4 Feb 2011 05:08:21 +0000 (00:08 -0500)]
inorder: overload find-req fn
no need to have separate function name findSplitRequest, just overload the function

13 years agoinorder: implement separate fetch unit
Korey Sewell [Fri, 4 Feb 2011 05:08:20 +0000 (00:08 -0500)]
inorder: implement separate fetch unit
instead of having one cache-unit class be responsible for both data and code
accesses, separate code that is just for fetch in it's own derived class off the
original base class. This makes the code easier to manage as well as handle
future cases of special fetch handling

13 years agoinorder: cache port blocking
Korey Sewell [Fri, 4 Feb 2011 05:08:19 +0000 (00:08 -0500)]
inorder: cache port blocking
set the request to false when the cache port blocks so we dont deadlock.
also, comment out the outstanding address list sanity check for now.

13 years agoinorder: stage width as a python parameter
Korey Sewell [Fri, 4 Feb 2011 05:08:18 +0000 (00:08 -0500)]
inorder: stage width as a python parameter
allow the user to specify how many instructions a pipeline stage can process
on any given cycle (stageWidth...i.e.bandwidth) by setting the parameter through
the python interface rather than compile the code after changing the *.cc file.
(we always had the parameter there, but still used the static 'ThePipeline::StageWidth'
instead)
-
Since StageWidth is now dynamically defined, change the interstage communication
structure to use a vector and get rid of array and array handling index (toNextStageIndex)
since we can just make calls to the list for the same information

13 years agoinorder: multi-issue branch resolution
Korey Sewell [Fri, 4 Feb 2011 05:08:17 +0000 (00:08 -0500)]
inorder: multi-issue branch resolution
Only execute (resolve) one branch per cycle because handling more than one is
a little more complicated

13 years agoinorder: pipe. stage inst. buffering
Korey Sewell [Fri, 4 Feb 2011 05:08:16 +0000 (00:08 -0500)]
inorder: pipe. stage inst. buffering
use skidbuffer as only location for instructions between stages. before,
we had the insts queue from the prior stage and the skidbuffer for the
current stage, but that gets confusing and this consolidation helps
when handling squash cases

13 years agoinorder: change skidBuffer to list instead of queue
Korey Sewell [Fri, 4 Feb 2011 05:08:15 +0000 (00:08 -0500)]
inorder: change skidBuffer to list instead of queue
manage insertion and deletion like a queue but will need
access to internal elements for future changes
Currently, skidbuffer manages any instruction that was
in a stage but could not complete processing, however
we will want to manage all blocked instructions (from prev stage
and from cur. stage) in just one buffer.

13 years agoinorder: activity tracking bug
Korey Sewell [Fri, 4 Feb 2011 05:08:13 +0000 (00:08 -0500)]
inorder: activity tracking bug
Previous code was marking CPU activity on almost every cycle due to a bug in
tracking the status of pipeline stages. This disables the CPU from sleeping
on long latency stalls and increases simulation time

13 years agoFault: Rename sim/fault.hh to fault_fwd.hh to distinguish it from faults.hh.
Gabe Black [Fri, 4 Feb 2011 05:47:58 +0000 (21:47 -0800)]
Fault: Rename sim/fault.hh to fault_fwd.hh to distinguish it from faults.hh.

--HG--
rename : src/sim/fault.hh => src/sim/fault_fwd.hh

13 years agoMem,X86: Make the IO bridge pass APIC messages back towards the CPU.
Gabe Black [Fri, 4 Feb 2011 04:56:27 +0000 (20:56 -0800)]
Mem,X86: Make the IO bridge pass APIC messages back towards the CPU.

13 years agoConfig: Keep track of uncached and cached ports separately.
Gabe Black [Fri, 4 Feb 2011 04:23:00 +0000 (20:23 -0800)]
Config: Keep track of uncached and cached ports separately.

This makes sure that the address ranges requested for caches and uncached ports
don't conflict with each other, and that accesses which are always uncached
(message signaled interrupts for instance) don't waste time passing through
caches.

13 years agoO3: Fix a style bug in O3.
Gabe Black [Thu, 3 Feb 2011 07:34:14 +0000 (23:34 -0800)]
O3: Fix a style bug in O3.

13 years agoX86: Get rid of the stupd microop.
Gabe Black [Thu, 3 Feb 2011 03:57:12 +0000 (19:57 -0800)]
X86: Get rid of the stupd microop.

13 years agoStats: Update the x86 stats to reflect changing stupd to a store and update.
Gabe Black [Thu, 3 Feb 2011 03:56:49 +0000 (19:56 -0800)]
Stats: Update the x86 stats to reflect changing stupd to a store and update.

13 years agoX86: Replace the stupd microop with a store/update sequence.
Gabe Black [Thu, 3 Feb 2011 03:56:38 +0000 (19:56 -0800)]
X86: Replace the stupd microop with a store/update sequence.

13 years agoX86: Build O3 by default in SE.
Gabe Black [Thu, 3 Feb 2011 02:17:16 +0000 (18:17 -0800)]
X86: Build O3 by default in SE.

13 years agoTime: Add serialization functions to the Time class.
Gabe Black [Thu, 3 Feb 2011 02:05:03 +0000 (18:05 -0800)]
Time: Add serialization functions to the Time class.

13 years agoX86: Change how the default disk image gets set up.
Gabe Black [Thu, 3 Feb 2011 02:03:58 +0000 (18:03 -0800)]
X86: Change how the default disk image gets set up.

The disk image to use was always being forced to a particular value. This
change changes what disk image is selected as the default based on the
architecture being built. In the future, a more sophisticated system might be
used that selected a path based on certain rules instead of relying on one off
file names.

13 years agoX86: Add L1 caches for the TLB walkers.
Gabe Black [Wed, 2 Feb 2011 02:28:41 +0000 (18:28 -0800)]
X86: Add L1 caches for the TLB walkers.

Small L1 caches are connected to the TLB walkers when caches are used. This
allows them to participate in the coherence protocol properly.

13 years agoFault: Move the definition of NoFault from faults.hh to fault.hh.
Gabe Black [Mon, 31 Jan 2011 21:13:00 +0000 (13:13 -0800)]
Fault: Move the definition of NoFault from faults.hh to fault.hh.

Moving the definition of NoFault into fault.hh doesn't bring any new
dependencies with it, and allows some files to include just fault.hh which has
less baggage. NoFault will still be available to everything that includes
faults.hh because it includes fault.hh.

13 years agorefcnt: Change things around so that we handle constness correctly.
Nathan Binkert [Sun, 23 Jan 2011 05:48:06 +0000 (21:48 -0800)]
refcnt: Change things around so that we handle constness correctly.
To use a non const pointer:
typedef RefCountingPtr<Foo> FooPtr;

To use a const pointer:
typedef RefCountingPtr<const Foo> ConstFooPtr;

13 years agoSConstruct: Fix the librt check in SConstruct.
Gabe Black [Sat, 22 Jan 2011 01:51:22 +0000 (17:51 -0800)]
SConstruct: Fix the librt check in SConstruct.

13 years agocheckpointing: fix bug from curTick accessor conversion.
Steve Reinhardt [Fri, 21 Jan 2011 06:13:33 +0000 (22:13 -0800)]
checkpointing: fix bug from curTick accessor conversion.

Regex replacement of curTick with curTick() accidentally
changed checkpoint key string for serialization but not
for unserialization.

13 years agoTimeSync: Use the new setTick and getTick functions.
Gabe Black [Thu, 20 Jan 2011 00:22:23 +0000 (16:22 -0800)]
TimeSync: Use the new setTick and getTick functions.

13 years agoTime: Add setTick and getTick functions to the Time class.
Gabe Black [Thu, 20 Jan 2011 00:22:15 +0000 (16:22 -0800)]
Time: Add setTick and getTick functions to the Time class.

13 years agoTime: Add a mechanism to prevent M5 from running faster than real time.
Gabe Black [Wed, 19 Jan 2011 19:48:00 +0000 (11:48 -0800)]
Time: Add a mechanism to prevent M5 from running faster than real time.

M5 skips over any simulated time where it doesn't have any work to do. When
the simulation is active, the time skipped is short and the work done at any
point in time is relatively substantial. If the time between events is long
and/or the work to do at each event is small, it's possible for simulated time
to pass faster than real time. When running a benchmark that can be good
because it means the simulation will finish sooner in real time. When
interacting with the real world through, for instance, a serial terminal or
bridge to a real network, this can be a problem. Human or network response time
could be greatly exagerated from the perspective of the simulation and make
simulated events happen "too soon" from an external perspective.

This change adds the capability to force the simulation to run no faster than
real time. It does so by scheduling a periodic event that checks to see if
its simulated period is shorter than its real period. If it is, it stalls the
simulation until they're equal. This is called time syncing.

A future change could add pseudo instructions which turn time syncing on and
off from within the simulation. That would allow time syncing to be used for
the interactive parts of a session but then turned off when running a
benchmark using the m5 utility program inside a script. Time syncing would
probably not happen anyway while running a benchmark because there would be
plenty of work for M5 to do, but the event overhead could be avoided.

13 years agoARM/O3: Add regressions for ARM w/ O3 CPU.
Ali Saidi [Tue, 18 Jan 2011 22:30:06 +0000 (16:30 -0600)]
ARM/O3: Add regressions for ARM w/ O3 CPU.

13 years agoStats: Update stats for previous set of patches.
Ali Saidi [Tue, 18 Jan 2011 22:30:06 +0000 (16:30 -0600)]
Stats: Update stats for previous set of patches.

13 years agoO3: Fix itstate prediction and recovery.
Matt Horsnell [Tue, 18 Jan 2011 22:30:05 +0000 (16:30 -0600)]
O3: Fix itstate prediction and recovery.

Any change of control flow now resets the itstate to 0 mask and 0 condition,
except where the control flow alteration write into the cpsr register. These
case, for example return from an iterrupt, require the predecoder to recover
the itstate.

As there is a window of opportunity between the return from an interrupt
changing the control flow at the head of the pipe and the commit of the update
to the CPSR, the predecoder needs to be able to grab the ITstate early. This
is now handled by setting the forcedItState inside a PCstate for the control
flow altering instruction.

That instruction will have the correct mask/cond, but will not have a valid
itstate until advancePC is called (note this happens to advance the execution).
When the new PCstate is copy constructed it gets the itstate cond/mask, and
upon advancing the PC the itstate becomes valid.

Subsequent advancing invalidates the state and zeroes the cond/mask. This is
handled in isolation for the ARM ISA and should have no impact on other ISAs.

Refer arch/arm/types.hh and arch/arm/predecoder.cc for the details.

13 years agoO3: Fix some variable length instruction issues with the O3 CPU and ARM ISA.
Matt Horsnell [Tue, 18 Jan 2011 22:30:05 +0000 (16:30 -0600)]
O3: Fix some variable length instruction issues with the O3 CPU and ARM ISA.

13 years agoO3: Don't test misprediction on load instructions until executed.
Matt Horsnell [Tue, 18 Jan 2011 22:30:05 +0000 (16:30 -0600)]
O3: Don't test misprediction on load instructions until executed.

13 years agoO3: Keep around the last committed instruction and use for squashing.
Ali Saidi [Tue, 18 Jan 2011 22:30:05 +0000 (16:30 -0600)]
O3: Keep around the last committed instruction and use for squashing.

Without this change 0 is always used for the youngest sequence number if
a squash occured and the ROB was empty (E.g. an instruction is marked
serializeAfter or a fetch stall prevents other instructions from issuing).
Using 0 there is a race to rename where an instruction that committed the
same cycle as the squashing instruction can have it's renamed state undone
by the squash using sequence number 0.

13 years agoO3: Don't try to scoreboard misc registers.
Ali Saidi [Tue, 18 Jan 2011 22:30:05 +0000 (16:30 -0600)]
O3: Don't try to scoreboard misc registers.

I'm not positive this is the correct fix, but it's working right now.
Either we need to do something like this, prevent the misc reg from being renamed at all,
or there something else going on. We need to find the root cause as to why
this is only a problem sometimes.

13 years agoARM: The ARM decoder should not panic when decoding undefined holes is arch.
Matt Horsnell [Tue, 18 Jan 2011 22:30:05 +0000 (16:30 -0600)]
ARM: The ARM decoder should not panic when decoding undefined holes is arch.

This can abort simulations when the fetch unit runs ahead and speculatively
decodes instructions that are off the execution path.

13 years agoO3: Fix corner cases where multiple squashes/fetch redirects overwrite timebuf.
Matt Horsnell [Tue, 18 Jan 2011 22:30:05 +0000 (16:30 -0600)]
O3: Fix corner cases where multiple squashes/fetch redirects overwrite timebuf.

13 years agoO3: Fix mispredicts from non control instructions.
Matt Horsnell [Tue, 18 Jan 2011 22:30:05 +0000 (16:30 -0600)]
O3: Fix mispredicts from non control instructions.
The squash inside the fetch unit should not attempt to remove them from the
branch predictor as non-control instructions are not pushed into the predictor.

13 years agoO3: Fixes the way prefetches are handled inside the iew unit.
Matt Horsnell [Tue, 18 Jan 2011 22:30:02 +0000 (16:30 -0600)]
O3: Fixes the way prefetches are handled inside the iew unit.

This patch prevents the prefetch being added to the instCommit queue twice.

13 years agoO3: Support timing translations for O3 CPU fetch.
Ali Saidi [Tue, 18 Jan 2011 22:30:02 +0000 (16:30 -0600)]
O3: Support timing translations for O3 CPU fetch.

13 years agoARM: Add support for moving predicated false dest operands from sources.
Ali Saidi [Tue, 18 Jan 2011 22:30:02 +0000 (16:30 -0600)]
ARM: Add support for moving predicated false dest operands from sources.

13 years agoO3: Fixes fetch deadlock when the interrupt clears before CPU handles it.
Min Kyu Jeong [Tue, 18 Jan 2011 22:30:01 +0000 (16:30 -0600)]
O3: Fixes fetch deadlock when the interrupt clears before CPU handles it.

When this condition occurs the cpu should restart the fetch stage to fetch from
the original execution path. Fault handling in the commit stage is cleaned up a
little bit so the control flow is simplier. Finally, if an instruction is being
used to carry a fault it isn't executed, so the fault propagates appropriately.

13 years agoARM: Use an actual NOP instead of a instruction that happens to do nothing
Ali Saidi [Tue, 18 Jan 2011 22:30:01 +0000 (16:30 -0600)]
ARM: Use an actual NOP instead of a instruction that happens to do nothing

13 years agoARM: fix mismatched new/delete.
Ali Saidi [Tue, 18 Jan 2011 22:30:01 +0000 (16:30 -0600)]
ARM: fix mismatched new/delete.

13 years agomkblankimage: bash != sh on many systems and this script needs bash
Ali Saidi [Tue, 18 Jan 2011 22:30:00 +0000 (16:30 -0600)]
mkblankimage: bash != sh on many systems and this script needs bash