The "execute" portion of IEW is really just the last cycle of execution, at which point execute() gets called. Execution begins inside the IQ, when it schedules FUs for specific instructions. As a result, the Execute stage should just pull all completing instructions out of the IQ stage and execute them.
Limiting the number of writebacks outstanding must still be done.
cpu/o3/iew_impl.hh:
Rework how instructions are scheduled and executed. There shouldn't be a specific "width" from issue to execute because issue does the scheduling of the functional units (really the beginning of the execution).
cpu/o3/inst_queue.hh:
cpu/o3/inst_queue_impl.hh:
Rework how instructions are scheduled and executed.
--HG--
extra : convert_revision : bbf1a8a4c0a2f2a938bdd78d74493048fd3b4b55
cpu/checker/cpu.cc:
Cleanup checker, give more useful warning messages.
Also fix bug
cpu/checker/cpu.hh:
Cleanup checker, use forward declaration instead of include.
--HG--
extra : convert_revision : 8f231199a0a75788218320cdbcc7f70441e5d574
arch/alpha/ev5.cc:
Move kernel stats out of CPU and into XC. Also be sure to check if the kernel stats exist prior to using them.
--HG--
extra : convert_revision : 565cd7026410fd7d8586f953d9b328c2e67a9473
IsIprAccess flag may go away in the future (op class can be used to tell this), and the CPU still needs a specific way to identify/deal with syscalls.
arch/alpha/isa/decoder.isa:
Added a few extra flags to help the new CPU identify various classes of instructions without having to force certain behaviors for all CPUs.
cpu/base_dyn_inst.hh:
cpu/static_inst.hh:
Added extra flags.
cpu/o3/iew_impl.hh:
cpu/o3/inst_queue_impl.hh:
Handle store conditionals specially.
cpu/o3/lsq_unit_impl.hh:
Extra flags tells if the instruction is a store conditional.
cpu/o3/rename_impl.hh:
Handle IPR accesses and store conditionals specially.
--HG--
extra : convert_revision : 39debec4fa5341ae8a8ab5650bd12730aeb6c04f
cpu/SConscript:
Remove sat_counter.cc and push its functions into the .hh file (all functions were 3 or less lines).
cpu/o3/sat_counter.hh:
Incorporate .cc code into this file.
--HG--
extra : convert_revision : d75b1319292b00b00af1ce377cc0215fd06e6916
Dependecy graph code moved into its own class.
This requires the changes to the functional units, which is in the next check in.
cpu/o3/iew.hh:
cpu/o3/iew_impl.hh:
IEW and IQ code cleanup and reorganization.
cpu/o3/inst_queue.cc:
Dependency graph code moved into its own class now.
cpu/o3/inst_queue.hh:
IEW/IQ code cleanup and reorganization.
Dependecy graph code moved into its own class.
cpu/o3/inst_queue_impl.hh:
IEW/IQ code cleanup and reorganization.
Dependecy graph code moved into its own class.
Issue loop cleaned up, with completion events for functional units now used more correctly (before they weren't used for multi-cycle ops with pipelined FU's).
--HG--
extra : convert_revision : 35e50192df6f71dc81d46a73fdd65f7ec07c10e4
SConscript:
Split off activity/idling code into its own class to do the processing separately.
cpu/o3/alpha_cpu_builder.cc:
cpu/o3/alpha_params.hh:
Activity stuff. This is mostly for debugging and may be removed later on (or changed to enable/disable activity idling).
cpu/o3/cpu.cc:
Move activity idling stuff mostly into its own class, so it no longer clutters this file.
cpu/o3/cpu.hh:
Move activity idling stuff into its own class.
python/m5/objects/AlphaFullCPU.py:
Add parameter for initial activity value.
--HG--
extra : convert_revision : f32f7cc03895dc07ab57ddba78c5402a1a8b0f1a
cpu/checker/cpu.cc:
Fixups for fetch fault being sent with the instruction.
cpu/o3/fetch_impl.hh:
cpu/ozone/front_end_impl.hh:
Send any faults generated at fetch along with a fake nop instruction to the back end. This avoids having to use direct communication to check if the entire front end has drained; it is naturally handled through the nop's fault being handled when it reaches the head of commit.
cpu/ozone/front_end.hh:
Add extra status TrapPending.
cpu/ozone/lw_back_end_impl.hh:
Fetch fault handled through a dummy nop carrying the fetch fault.
Avoid putting Nops on the exeList.
--HG--
extra : convert_revision : 8d9899748b34c204763a49c48a9b5113864f5789
cpu/ozone/cpu.hh:
Updates for sampler.
cpu/ozone/cpu_impl.hh:
Updates for sampler, checker.
cpu/ozone/inorder_back_end.hh:
Sampler updates. Also support old memory system.
--HG--
extra : convert_revision : 33ebe38e4c08d49c6af84032b819533b784b4fe8
cpu/o3/alpha_cpu.hh:
Update for sampler to work properly. Also code cleanup.
cpu/o3/alpha_cpu_builder.cc:
cpu/o3/alpha_dyn_inst.hh:
Updates to support the checker.
cpu/o3/alpha_cpu_impl.hh:
Updates to support the checker. Also general code cleanup.
cpu/o3/alpha_dyn_inst_impl.hh:
Code cleanup.
cpu/o3/alpha_params.hh:
Updates to support the checker. Also supports trap latencies set through the parameters.
cpu/o3/commit.hh:
Supports sampler, checker. Code cleanup.
cpu/o3/commit_impl.hh:
Updates to support the sampler and checker, as well as general code cleanup.
cpu/o3/cpu.cc:
cpu/o3/cpu.hh:
Support sampler and checker.
cpu/o3/decode_impl.hh:
Supports sampler.
cpu/o3/fetch.hh:
Supports sampler. Also update to hold the youngest valid SN fetch has seen to ensure that the entire pipeline has been drained.
cpu/o3/fetch_impl.hh:
Sampler updates. Also be sure to not fetches to uncached space (bad path).
cpu/o3/iew.hh:
cpu/o3/iew_impl.hh:
Sampler updates.
cpu/o3/lsq_unit_impl.hh:
Supports checker.
cpu/o3/regfile.hh:
No need for accessing xcProxies directly.
cpu/o3/rename.hh:
cpu/o3/rename_impl.hh:
Sampler support.
--HG--
extra : convert_revision : 03881885dd50ebbca13ef31f31492fd4ef59121c
base/traceflags.py:
build/SConstruct:
cpu/SConscript:
cpu/cpu_models.py:
Add in Checker.
cpu/base.cc:
Add in checker support. Also XC status starts off as suspended.
cpu/base.hh:
Add in checker.
--HG--
extra : convert_revision : 091b5cc83e837858adb681ef0137a0beb30bd1b2
cpu/cpu_exec_context.cc:
cpu/cpu_exec_context.hh:
Sampling fixes. The CPU models may switch during a quiesce period, so it needs to be sure to wake up the right XC.
cpu/exec_context.hh:
Return the EndQuiesceEvent specifically.
sim/pseudo_inst.cc:
Return the EndQuiesceEvent specifically for sampling.
--HG--
extra : convert_revision : f9aa1fc8d4db8058f05319cb6a3d4605ce93b4c8
arch/alpha/isa/decoder.isa:
Mark store conditionals as serializing. This is slightly higher over head than they truly have in the 264, but it's close. Normally they block any other instructions from entering the IQ until the IQ is empty. This is higher overhead because it waits until the ROB is empty.
Also mark RPCC as unverifiable. The checker will just grab the value from the instruction and assume it's correct.
cpu/static_inst.hh:
Add unverifiable flag, specifically for the CheckerCPU.
--HG--
extra : convert_revision : cbc34d1f2f5b07105d31d4bd8f19edae2cf8158e
cpu/base_dyn_inst.hh:
Remove snoop function (did not mean to commit it).
cpu/ozone/back_end_impl.hh:
Set instruction as having its result ready, not completed.
cpu/ozone/cpu.hh:
Fixes for store conditionals. Use an additional lock addr list to make sure that the access is valid. I don't know if this is fully necessary, but it gives me a peace of mind (at some performance cost).
Make sure to schedule for cycles(1) and not just 1 cycle in the future as tick = 1ps.
Also support the new Checker.
cpu/ozone/cpu_builder.cc:
Add parameter for maxOutstandingMemOps so it can be set through the config.
Also add in the checker. Right now it's a BaseCPU simobject, but that may change in the future.
cpu/ozone/cpu_impl.hh:
Add support for the checker. For now there's a dynamic cast to convert the simobject passed back from the builder to the proper Checker type. It's ugly, but only happens at startup, and is probably a justified use of dynamic cast.
Support switching out/taking over from other CPUs.
Correct indexing problem for float registers.
cpu/ozone/dyn_inst.hh:
Add ability for instructions to wait on memory instructions in addition to source register instructions. This is needed for memory dependence predictors and memory barriers.
cpu/ozone/dyn_inst_impl.hh:
Support waiting on memory operations.
Use "resultReady" to differentiate an instruction having its registers produced vs being totally completed.
cpu/ozone/front_end.hh:
Support switching out.
Also record if an interrupt is pending.
cpu/ozone/front_end_impl.hh:
Support switching out. Also support stalling the front end if an interrupt is pending.
cpu/ozone/lw_back_end.hh:
Add checker in.
Support switching out.
Support memory barriers.
cpu/ozone/lw_back_end_impl.hh:
Lots of changes to get things to work right.
Faults, traps, interrupts all wait until all stores have written back (important).
Memory barriers are supported, as is the general ability for instructions to be dependent on other memory instructions.
cpu/ozone/lw_lsq.hh:
Support switching out.
Also use store writeback events in all cases, not just dcache misses.
cpu/ozone/lw_lsq_impl.hh:
Support switching out.
Also use store writeback events in all cases, not just dcache misses.
Support the checker CPU. Marks instructions as completed once the functional access is done (which has to be done for the checker to be able to verify results).
cpu/ozone/simple_params.hh:
Add max outstanding mem ops parameter.
python/m5/objects/OzoneCPU.py:
Add max outstanding mem ops, checker.
--HG--
extra : convert_revision : f4d408e1bb1f25836a097b6abe3856111e950c59
cpu/o3/alpha_dyn_inst.hh:
Set the instResult using a function on the base dyn inst.
cpu/o3/bpred_unit_impl.hh:
Don't need to reset the state.
cpu/o3/commit_impl.hh:
Mark instructions as completed.
Wait until all stores are written back to handle a fault.
cpu/o3/cpu.cc:
Clear instruction lists when switching out.
cpu/o3/lsq_unit.hh:
Allow wbEvent to be set externally.
cpu/o3/lsq_unit_impl.hh:
Mark instructions as completed properly. Also use events for writing back stores even if there is a hit in the dcache.
--HG--
extra : convert_revision : 172ad088b75ac31e848a5040633152b5c051444c
cpu/simple/cpu.cc:
Sampler fixes. The status may be switched out when calling activate or suspend if there is a switchover during a quiesce.
--HG--
extra : convert_revision : da026e75dfb86289484cf01c5b1ecd9b03a72bd3
cpu/ozone/cpu.hh:
Add quiesce stat (not clear how it should be used yet).
cpu/ozone/cpu_impl.hh:
Fix for quiesce.
--HG--
extra : convert_revision : a1998818e241374ae3f4c3cabbef885dda55c884
cpu/o3/alpha_cpu.hh:
Store conditionals should not write their data to memory if they failed.
cpu/o3/lsq_unit.hh:
Setup request parameters when they're needed.
--HG--
extra : convert_revision : d75cd7deda03584b7e25cb567e4d79032cac7118
cpu/static_inst.hh:
Updates for new CPU, also include a classification of quiesce instructions.
--HG--
extra : convert_revision : a34cd56da88fe57d7de24674fbb375bbf13f887f
cpu/exec_context.hh:
Remove functions that shouldn't be accessible to anything outside of the CPU.
--HG--
extra : convert_revision : 9793c3ceb6d5404484bafc7a75d75ed71815d9eb
build/SConstruct:
Include Ozone CPU models.
cpu/cpu_models.py:
Include OzoneCPU models.
--HG--
extra : convert_revision : 51a016c216cacd2cc613eed79653026c2edda4b3
arch/alpha/isa/decoder.isa:
Make IPR accessing instructions serializing so they are not issued incorrectly in the O3 model.
arch/alpha/isa/pal.isa:
Allow IPR instructions to have flags.
base/traceflags.py:
Include new trace flags from the two new CPU models.
cpu/SConscript:
Create the templates for the split mem accessor methods. Also include the new files from the new models (the Ozone model will be checked in next).
cpu/base_dyn_inst.cc:
cpu/base_dyn_inst.hh:
Update to the BaseDynInst for the new models.
--HG--
extra : convert_revision : cc82db9c72ec3e29cea4c3fdff74a3843e287a35
check abi-tag note section of elf binary for OS
add pseudo functions (moved from alpha and made to be generic)
move setsyscallreturn into isa traits
arch/alpha/SConscript:
no more common syscall emulation, now common for everyone
arch/alpha/isa_traits.hh:
move setsyscallreturn into isa description
arch/alpha/linux/process.cc:
arch/alpha/tru64/process.cc:
use generic functions rather than alpha specific ones
arch/sparc/isa_traits.hh:
have consts for generic pseudo syscalls
arch/sparc/linux/process.cc:
use generic functions
base/loader/elf_object.cc:
check abi-tag note section of elf binary for OS
cpu/exec_context.hh:
move syssyscallreturn into isa traits
sim/process.cc:
find call num with a more generic
sim/syscall_emul.cc:
sim/syscall_emul.hh:
add pseudo functions (moved from alpha and made to be generic)
--HG--
extra : convert_revision : 5a31024ecde7e39b830365ddd84593ea501a34d2
cpu/exec_context.hh:
Include readNextNPC function.
cpu/simple/cpu.cc:
Use functions to set and access nextPC, nextNPC.
--HG--
extra : convert_revision : 22622b9c110e1d99cc9106a2a27c479579d7e1ad
arch/alpha/isa_traits.hh:
arch/sparc/isa_traits.hh:
add nnpc for compiling purposes in exec_context setNextNPC function
cpu/exec_context.hh:
set NNPC function
cpu/simple/cpu.cc:
use NNPC in determining what PC we are using
--HG--
extra : convert_revision : e810cfbc5dc31879b20d2cc40bf9871613203532
arch/alpha/ev5.cc:
Include function for the MiscRegFile to copy all of the Iprs from an ExecContext.
arch/alpha/isa_traits.hh:
Include functions to copy MiscRegs from an ExecContext.
cpu/cpu_exec_context.cc:
Be sure to copy all of the misc regs when copying all architectural state.
--HG--
extra : convert_revision : cb948b5ff141ea0f739a1016f98236bd2a512f76
cpu/base.cc:
Change to be calls through the ExecContext instead of accessing the profile object directly.
cpu/cpu_exec_context.cc:
Add functions to clear and sample the profile object.
cpu/cpu_exec_context.hh:
Add functions to clear and sample the profile object. These are not the most flexible functions; it might be better to eventually move the quiesce, profile, and store conditional stuff out of ExecContext so they don't clutter the interface.
cpu/exec_context.hh:
Include functions to support using the profile object to clear itself and take samples.
--HG--
extra : convert_revision : 40849915fd51303673451515debb9ecdc7afb8c8
Also several files need to include system.hh or symtab.hh. This is because exec_context.hh has less #includes than before, requiring some of the files that include it to include some other files as well.
arch/alpha/faults.cc:
Avoid accessing XC directly.
arch/alpha/stacktrace.cc:
StackTrace needs to include system.hh.
cpu/cpu_exec_context.cc:
Update for change to CPUExecContext.
cpu/cpu_exec_context.hh:
Make quiesce events use CPUExecContext instead of ExecContext. Include functions to allow the quiesce event and last activate/suspend be accessed.
cpu/exec_context.hh:
Include functions for quiesceEvent.
cpu/intr_control.cc:
Needs to include cpu/exec_context.hh.
cpu/profile.cc:
Needs to include symtab.hh for the symbol table.
cpu/profile.hh:
Needs forward declare of ExecContext.
cpu/simple/cpu.cc:
Rename xc to cpuXC.
dev/tsunami_cchip.cc:
Needs to include exec_context.hh.
kern/kernel_stats.cc:
Needs to include system.hh.
kern/linux/events.cc:
Needs to include system.hh.
Also avoid accessing objects directly from the XC.
kern/tru64/dump_mbuf.cc:
Include symtab.hh for the SymbolTable and system.hh.
kern/tru64/tru64_events.cc:
Include system.hh
sim/pseudo_inst.cc:
Avoid accessing objects directly within the XC.
--HG--
extra : convert_revision : 78fe30d98cd20f7403fa216f772071458b675c84
arch/SConscript:
ev5 should now be contained within alpha specific code.
arch/alpha/ev5.cc:
arch/alpha/isa_traits.hh:
Added getInstAsid and getDataAsid functions. These should be removed when the SimpleScalar cpu model is removed.
arch/sparc/isa_traits.hh:
Added getInstAsid and getDataAsid functions. These should be removed when the SimpleScalar cpu model is removed. Also made some small fixes.
cpu/o3/alpha_cpu.hh:
Added typedefs which are required now that there isn't a using namespace EV5.
cpu/o3/alpha_cpu_impl.hh:
Some small changes so that ev5.hh isn't needed directly.
cpu/o3/cpu.hh:
Removed including ev5.hh, and pushed retrieving the Asid into the MiscRegFile.
cpu/o3/regfile.hh:
Removed the include of ev5.hh, using namespace EV5, and the now redundant ipr array.
--HG--
extra : convert_revision : 5ef8f69435a3a888a3f06d0095d89326dafb33fd
The major change is renaming the old ExecContext to CPUExecContext, and creating two new classes, ExecContext (an abstract class), and ProxyExecContext (a templated class that derives from ExecContext).
Code outside of the CPU continues to use ExecContext as normal (other than not being able to access variables within the XC). The CPU uses the CPUExecContext, or however else it stores its own state. It then creates a ProxyExecContext, templated on the class used to hold its state. This proxy is passed to any code outside of the CPU that needs to access the XC. This allows code outside of the CPU to use the ExecContext interface to access any state needed, without knowledge of how that state is laid out.
Note that these changes will not compile without the accompanying revision to automatically rename the shadow registers.
SConscript:
Include new file, cpu_exec_context.cc.
arch/alpha/alpha_linux_process.cc:
arch/alpha/alpha_memory.cc:
arch/alpha/alpha_tru64_process.cc:
arch/alpha/arguments.cc:
arch/alpha/isa/decoder.isa:
arch/alpha/stacktrace.cc:
arch/alpha/vtophys.cc:
base/remote_gdb.cc:
cpu/intr_control.cc:
Avoid directly accessing objects within the XC.
arch/alpha/ev5.cc:
Avoid directly accessing objects within the XC.
KernelStats have been moved to the BaseCPU instead of the XC.
arch/alpha/isa_traits.hh:
Remove clearIprs(). It wasn't used very often and it did not work well with the proxy ExecContext.
cpu/base.cc:
Place kernel stats within the BaseCPU instead of the ExecContext.
For now comment out the profiling code sampling until its exact location is decided upon.
cpu/base.hh:
Kernel stats are now in the BaseCPU instead of the ExecContext.
cpu/base_dyn_inst.cc:
cpu/base_dyn_inst.hh:
cpu/memtest/memtest.cc:
cpu/memtest/memtest.hh:
Changes to support rename of old ExecContext to CPUExecContext. See changeset for more details.
cpu/exetrace.cc:
Remove unneeded include of exec_context.hh.
cpu/intr_control.hh:
cpu/o3/alpha_cpu_builder.cc:
Remove unneeded include of exec_context.hh
cpu/o3/alpha_cpu.hh:
cpu/o3/alpha_cpu_impl.hh:
cpu/o3/cpu.cc:
cpu/o3/cpu.hh:
cpu/simple/cpu.cc:
cpu/simple/cpu.hh:
Changes to support rename of old ExecContext to CPUExecContext. See changeset for more details.
Also avoid accessing anything directly from the XC.
cpu/pc_event.cc:
Avoid accessing objects directly from the XC.
dev/tsunami_cchip.cc:
Avoid accessing objects directly within the XC>
kern/freebsd/freebsd_system.cc:
kern/linux/linux_system.cc:
kern/linux/linux_threadinfo.hh:
kern/tru64/dump_mbuf.cc:
kern/tru64/tru64.hh:
kern/tru64/tru64_events.cc:
sim/syscall_emul.cc:
sim/syscall_emul.hh:
Avoid accessing objects directly within the XC.
kern/kernel_stats.cc:
kern/kernel_stats.hh:
Kernel stats no longer exist within the XC.
kern/system_events.cc:
Avoid accessing objects directly within the XC. Also kernel stats are now in the BaseCPU.
sim/process.cc:
sim/process.hh:
Avoid accessing regs directly within an ExecContext. Instead use a CPUExecContext to initialize the registers and copy them over.
cpu/cpu_exec_context.cc:
Rename old ExecContext to CPUExecContext. This is used by the old CPU models to store any necessary architectural state. Also include the ProxyExecContext, which is used to access the CPUExecContext's state in code outside of the CPU.
cpu/cpu_exec_context.hh:
Rename old ExecContext to CPUExecContext. This is used by the old CPU models to store any necessary architectural state. Also include the ProxyExecContext, which is used to access the CPUExecContext's state in code outside of the CPU.
Remove kernel stats from the ExecContext.
sim/pseudo_inst.cc:
Kernel stats now live within the CPU.
Avoid accessing objects directly within the XC.
--HG--
rename : cpu/exec_context.cc => cpu/cpu_exec_context.cc
rename : cpu/exec_context.hh => cpu/cpu_exec_context.hh
extra : convert_revision : a75393a8945c80cca225b5e9d9c22a16609efb85
