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2012-05-31Bus: Split the bus into a non-coherent and coherent busAndreas Hansson
This patch introduces a class hierarchy of buses, a non-coherent one, and a coherent one, splitting the existing bus functionality. By doing so it also enables further specialisation of the two types of buses. A non-coherent bus connects a number of non-snooping masters and slaves, and routes the request and response packets based on the address. The request packets issued by the master connected to a non-coherent bus could still snoop in caches attached to a coherent bus, as is the case with the I/O bus and memory bus in most system configurations. No snoops will, however, reach any master on the non-coherent bus itself. The non-coherent bus can be used as a template for modelling PCI, PCIe, and non-coherent AMBA and OCP buses, and is typically used for the I/O buses. A coherent bus connects a number of (potentially) snooping masters and slaves, and routes the request and response packets based on the address, and also forwards all requests to the snoopers and deals with the snoop responses. The coherent bus can be used as a template for modelling QPI, HyperTransport, ACE and coherent OCP buses, and is typically used for the L1-to-L2 buses and as the main system interconnect. The configuration scripts are updated to use a NoncoherentBus for all peripheral and I/O buses. A bit of minor tidying up has also been done. --HG-- rename : src/mem/bus.cc => src/mem/coherent_bus.cc rename : src/mem/bus.hh => src/mem/coherent_bus.hh rename : src/mem/bus.cc => src/mem/noncoherent_bus.cc rename : src/mem/bus.hh => src/mem/noncoherent_bus.hh
2012-03-09cache: Allow main memory to be at disjoint address ranges.Ali Saidi
2012-03-02CPU: Check that the interrupt controller is created when neededAndreas Hansson
This patch adds a creation-time check to the CPU to ensure that the interrupt controller is created for the cases where it is needed, i.e. if the CPU is not being switched in later and not a checker CPU. The patch also adds the "createInterruptController" call to a number of the regression scripts.
2012-02-13MEM: Introduce the master/slave port roles in the Python classesAndreas Hansson
This patch classifies all ports in Python as either Master or Slave and enforces a binding of master to slave. Conceptually, a master (such as a CPU or DMA port) issues requests, and receives responses, and conversely, a slave (such as a memory or a PIO device) receives requests and sends back responses. Currently there is no differentiation between coherent and non-coherent masters and slaves. The classification as master/slave also involves splitting the dual role port of the bus into a master and slave port and updating all the system assembly scripts to use the appropriate port. Similarly, the interrupt devices have to have their int_port split into a master and slave port. The intdev and its children have minimal changes to facilitate the extra port. Note that this patch does not enforce any port typing in the C++ world, it merely ensures that the Python objects have a notion of the port roles and are connected in an appropriate manner. This check is carried when two ports are connected, e.g. bus.master = memory.port. The following patches will make use of the classifications and specialise the C++ ports into masters and slaves.
2012-01-28SE/FS: Make SE vs. FS mode a runtime parameter.Gabe Black
2012-01-17MEM: Make the bus bridge unidirectional and fixed address rangeAndreas Hansson
This patch makes the bus bridge uni-directional and specialises the bus ports to be a master port and a slave port. This greatly simplifies the assumptions on both sides as either port only has to deal with requests or responses. The following patches introduce the notion of master and slave ports, and would not be possible without this split of responsibilities. In making the bridge unidirectional, the address range mechanism of the bridge is also changed. For the cases where communication is taking place both ways, an additional bridge is needed. This causes issues with the existing mechanism, as the busses cannot determine when to stop iterating the address updates from the two bridges. To avoid this issue, and also greatly simplify the specification, the bridge now has a fixed set of address ranges, specified at creation time.
2011-03-17Mem: Fix issue with dirty block being lost when entire block transferred to ↵Ali Saidi
non-cache. This change fixes the problem for all the cases we actively use. If you want to try more creative I/O device attachments (E.g. sharing an L2), this won't work. You would need another level of caching between the I/O device and the cache (which you actually need anyway with our current code to make sure writes propagate). This is required so that you can mark the cache in between as top level and it won't try to send ownership of a block to the I/O device. Asserts have been added that should catch any issues.
2011-02-03Config: Keep track of uncached and cached ports separately.Gabe Black
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.
2009-09-22python: Move more code into m5.util allow SCons to use that code.Nathan Binkert
Get rid of misc.py and just stick misc things in __init__.py Move utility functions out of SCons files and into m5.util Move utility type stuff from m5/__init__.py to m5/util/__init__.py Remove buildEnv from m5 and allow access only from m5.defines Rename AddToPath to addToPath while we're moving it to m5.util Rename read_command to readCommand while we're moving it Rename compare_versions to compareVersions while we're moving it. --HG-- rename : src/python/m5/convert.py => src/python/m5/util/convert.py rename : src/python/m5/smartdict.py => src/python/m5/util/smartdict.py
2008-07-16mem: use single BadAddr responder per system.Steve Reinhardt
Previously there was one per bus, which caused some coherence problems when more than one decided to respond. Now there is just one on the main memory bus. The default bus responder on all other buses is now the downstream cache's cpu_side port. Caches no longer need to do address range filtering; instead, we just have a simple flag to prevent snoops from propagating to the I/O bus.
2007-08-10Regression: Add an I/O Cache to the full system regressions that have a cache.Ali Saidi
--HG-- extra : convert_revision : 8ba96e21be2f602eed8258d410038dbe998ef176
2007-06-30Get rid of remaining traces of obsolete CoherenceProtocol object.Steve Reinhardt
--HG-- extra : convert_revision : c5555b00bef1b304a84886188ad2c0dcb4d7c5b9
2007-05-10remove hit_latency and make latency do the right thingAli Saidi
set the latency parameter in terms of a latency add caches to tsunami-simple configs configs/common/Caches.py: tests/configs/memtest.py: tests/configs/o3-timing-mp.py: tests/configs/o3-timing.py: tests/configs/simple-atomic-mp.py: tests/configs/simple-timing-mp.py: tests/configs/simple-timing.py: set the latency parameter in terms of a latency configs/common/FSConfig.py: give the bridge a default latency too src/mem/cache/cache_builder.cc: src/python/m5/objects/BaseCache.py: remove hit_latency and make latency do the right thing tests/configs/tsunami-simple-atomic-dual.py: tests/configs/tsunami-simple-atomic.py: tests/configs/tsunami-simple-timing-dual.py: tests/configs/tsunami-simple-timing.py: add caches to tsunami-simple configs --HG-- extra : convert_revision : 37bef7c652e97c8cdb91f471fba62978f89019f1
2007-03-06Move all of the parameters of the Root SimObject so they areNathan Binkert
directly configured by python. Move stuff from root.(cc|hh) to core.(cc|hh) since it really belogs there now. In the process, simplify how ticks are used in the python code. --HG-- extra : convert_revision : cf82ee1ea20f9343924f30bacc2a38d4edee8df3
2006-10-31Remove mem parameter. Now the translating port asks the CPU's dcache's peer ↵Kevin Lim
for its MemObject instead of having to have a paramter for the MemObject. configs/example/fs.py: configs/example/se.py: src/cpu/simple/base.cc: src/cpu/simple/base.hh: src/cpu/simple/timing.cc: src/cpu/simple_thread.cc: src/cpu/simple_thread.hh: src/cpu/thread_state.cc: src/cpu/thread_state.hh: tests/configs/o3-timing-mp.py: tests/configs/o3-timing.py: tests/configs/simple-atomic-mp.py: tests/configs/simple-atomic.py: tests/configs/simple-timing-mp.py: tests/configs/simple-timing.py: tests/configs/tsunami-simple-atomic-dual.py: tests/configs/tsunami-simple-atomic.py: tests/configs/tsunami-simple-timing-dual.py: tests/configs/tsunami-simple-timing.py: No need for mem parameter any more. src/cpu/checker/cpu.cc: Use new constructor for simple thread (no more MemObject parameter). src/cpu/checker/cpu.hh: Remove MemObject parameter. src/cpu/memtest/memtest.hh: Ports now take in their MemObject owner. src/cpu/o3/alpha/cpu_builder.cc: Remove mem parameter. src/cpu/o3/alpha/cpu_impl.hh: Remove memory parameter and clean up handling of TranslatingPort. src/cpu/o3/cpu.cc: src/cpu/o3/cpu.hh: src/cpu/o3/fetch.hh: src/cpu/o3/fetch_impl.hh: src/cpu/o3/mips/cpu_builder.cc: src/cpu/o3/mips/cpu_impl.hh: src/cpu/o3/params.hh: src/cpu/o3/thread_state.hh: src/cpu/ozone/cpu.hh: src/cpu/ozone/cpu_builder.cc: src/cpu/ozone/cpu_impl.hh: src/cpu/ozone/front_end.hh: src/cpu/ozone/front_end_impl.hh: src/cpu/ozone/lw_lsq.hh: src/cpu/ozone/lw_lsq_impl.hh: src/cpu/ozone/simple_params.hh: src/cpu/ozone/thread_state.hh: src/cpu/simple/atomic.cc: Remove memory parameter. --HG-- extra : convert_revision : 43cb44a33b31320d44b69679dcf646c0380d07d3
2006-10-08Implement Alpha LL/SC support for SimpleCPU (Atomic & Timing)Steve Reinhardt
and PhysicalMemory. *No* support for caches or O3CPU. Note that properly setting cpu_id on all CPUs is now required for correct operation. src/arch/SConscript: src/base/traceflags.py: src/cpu/base.hh: src/cpu/simple/atomic.cc: src/cpu/simple/timing.cc: src/cpu/simple/timing.hh: src/mem/physical.cc: src/mem/physical.hh: src/mem/request.hh: src/python/m5/objects/BaseCPU.py: tests/configs/simple-atomic.py: tests/configs/simple-timing.py: tests/configs/tsunami-simple-atomic-dual.py: tests/configs/tsunami-simple-atomic.py: tests/configs/tsunami-simple-timing-dual.py: tests/configs/tsunami-simple-timing.py: Implement Alpha LL/SC support for SimpleCPU (Atomic & Timing) and PhysicalMemory. *No* support for caches or O3CPU. --HG-- extra : convert_revision : 6ce982d44924cc477e049b9adf359818908e72be
2006-08-18Add caches in, fix cpu.mem paramSteve Reinhardt
--HG-- extra : convert_revision : 486283d83786807c72bb4601e4b9613b55d8802c
2006-08-16Finish test clean-up & reorg.Steve Reinhardt
configs/common/FSConfig.py: Add default Machine() param configs/example/fs.py: configs/example/se.py: make it work again src/python/m5/objects/BaseCPU.py: Make mem PhysicalMemory so that a Parent.any proxy works well src/sim/process.cc: Increase default stack size so we don't get an 'increasing stack' message on 'hello world' tests/SConscript: Add full list of current configs. tests/configs/simple-atomic.py: tests/configs/simple-timing.py: don't need SEConfig anymore tests/quick/00.hello/test.py: tests/quick/20.eio-short/test.py: fix tests/run.py: move configs to separate dir --HG-- rename : configs/test/fs.py => configs/example/fs.py rename : configs/test/test.py => configs/example/se.py rename : tests/simple-atomic.py => tests/configs/simple-atomic.py rename : tests/simple-timing.py => tests/configs/simple-timing.py rename : tests/linux-mpboot/ref/alpha/atomic/config.ini => tests/quick/10.linux-boot/ref/alpha/linux/tsunami-simple-atomic-dual/config.ini rename : tests/linux-mpboot/ref/alpha/atomic/config.out => tests/quick/10.linux-boot/ref/alpha/linux/tsunami-simple-atomic-dual/config.out rename : tests/linux-mpboot/ref/alpha/atomic/console.system.sim_console => tests/quick/10.linux-boot/ref/alpha/linux/tsunami-simple-atomic-dual/console.system.sim_console rename : tests/linux-mpboot/ref/alpha/atomic/m5stats.txt => tests/quick/10.linux-boot/ref/alpha/linux/tsunami-simple-atomic-dual/m5stats.txt rename : tests/linux-mpboot/ref/alpha/atomic/stderr => tests/quick/10.linux-boot/ref/alpha/linux/tsunami-simple-atomic-dual/stderr rename : tests/linux-mpboot/ref/alpha/atomic/stdout => tests/quick/10.linux-boot/ref/alpha/linux/tsunami-simple-atomic-dual/stdout rename : tests/linux-boot/ref/alpha/atomic/config.ini => tests/quick/10.linux-boot/ref/alpha/linux/tsunami-simple-atomic/config.ini rename : tests/linux-boot/ref/alpha/atomic/config.out => tests/quick/10.linux-boot/ref/alpha/linux/tsunami-simple-atomic/config.out rename : tests/linux-boot/ref/alpha/atomic/console.system.sim_console => tests/quick/10.linux-boot/ref/alpha/linux/tsunami-simple-atomic/console.system.sim_console rename : tests/linux-boot/ref/alpha/atomic/m5stats.txt => tests/quick/10.linux-boot/ref/alpha/linux/tsunami-simple-atomic/m5stats.txt rename : tests/linux-boot/ref/alpha/atomic/stderr => tests/quick/10.linux-boot/ref/alpha/linux/tsunami-simple-atomic/stderr rename : tests/linux-boot/ref/alpha/atomic/stdout => tests/quick/10.linux-boot/ref/alpha/linux/tsunami-simple-atomic/stdout rename : tests/linux-mpboot/ref/alpha/timing/config.ini => tests/quick/10.linux-boot/ref/alpha/linux/tsunami-simple-timing-dual/config.ini rename : tests/linux-mpboot/ref/alpha/timing/config.out => tests/quick/10.linux-boot/ref/alpha/linux/tsunami-simple-timing-dual/config.out rename : tests/linux-mpboot/ref/alpha/timing/console.system.sim_console => tests/quick/10.linux-boot/ref/alpha/linux/tsunami-simple-timing-dual/console.system.sim_console rename : tests/linux-mpboot/ref/alpha/timing/m5stats.txt => tests/quick/10.linux-boot/ref/alpha/linux/tsunami-simple-timing-dual/m5stats.txt rename : tests/linux-mpboot/ref/alpha/timing/stderr => tests/quick/10.linux-boot/ref/alpha/linux/tsunami-simple-timing-dual/stderr rename : tests/linux-mpboot/ref/alpha/timing/stdout => tests/quick/10.linux-boot/ref/alpha/linux/tsunami-simple-timing-dual/stdout rename : tests/test-progs/hello/bin/mips/linux/hello_mips => tests/test-progs/hello/bin/mips/linux/hello rename : tests/test-progs/hello/bin/sparc/bin => tests/test-progs/hello/bin/sparc/linux/hello extra : convert_revision : d68ee6d7eefa7ba57370f3fb3c3589f86a6ea6b4