Commit Graph

256 Commits (ad6c6790f96bb3b94025e1ec368d727ee17d8642)
 

Author SHA1 Message Date
Anton Blanchard 1d00c75ecc Remove nia from loadstore and multiply
Neither unit needs the NIA, so remove it.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
5 years ago
Anton Blanchard 8b88e26ece
Merge pull request #43 from mikey/trivial
Remove FIXME comment
5 years ago
Michael Neuling 1e1b799382 Remove FIXME comment
This was mistakenly left behind in 4d5abfb430 ("Remove dynamic
ranges from code")

Signed-off-by: Michael Neuling <mikey@neuling.org>
5 years ago
Anton Blanchard ff1455dea6
Merge pull request #41 from mikey/travis
Allow a full make check on Travis
5 years ago
Anton Blanchard 2f3ca35a6e
Merge pull request #42 from antonblanchard/fetch-rework-v2
Fetch rework
5 years ago
Anton Blanchard 4528ef2b43 Reformat core.vhdl 5 years ago
Anton Blanchard a2df2a10a2 Remove sim console
We can force all existing code to use the UART console
by passing 0 in bit zero of the sim config register.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
5 years ago
Anton Blanchard 68533c4cfb Reduce multiply to 2 cycles
We want all non load/store ops to take 2 cycles to make
tracking write back easier.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
5 years ago
Anton Blanchard 9fe8d211eb Register outputs on writeback
Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
5 years ago
Anton Blanchard c7aa683ba8 Register outputs on execute2
Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
5 years ago
Anton Blanchard 819f820090 Register outputs on loadstore1
Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
5 years ago
Anton Blanchard a8f8c54b77 Move debug execute output into decode2
This covers all units, and we avoid double printing.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
5 years ago
Anton Blanchard 92a7152370 Rework pipeline, add stall and flush signals
This adds stall and flush signals to the pipeline.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
5 years ago
Michael Neuling 6b06d5f67d Allow a full make check on Travis
Some Travis instances allow more CPU time. On these we can perform the
full 'make check'.

This patch allows this longer `make check`. To enable it you need to
go into your Travis configuration and add a TRAVIS_FULL_CHECK
environment variable.

If you don't add this environment, the shorter make check_light is
still run.

Signed-off-by: Michael Neuling <mikey@neuling.org>
5 years ago
Anton Blanchard 3b32abcb5d
Merge pull request #40 from antonblanchard/makefile-dependencies
Update Makefile dependencies
5 years ago
Anton Blanchard b6b2c78163 Update Makefile dependencies
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
5 years ago
Benjamin Herrenschmidt d3acb5cce9 Switch soc to use std_ulogic
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
5 years ago
Benjamin Herrenschmidt 3ac1dbc737 Share soc.vhdl between FPGA and sim
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
5 years ago
Benjamin Herrenschmidt d21ef5836d Pass wishbone record to bram memory module
(And rename it to mw_soc_memory).

This makes soc.vhdl simpler and provides the same interface as
the simulated memory, which will help when sharing soc.vhdl
with sim later

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
5 years ago
Benjamin Herrenschmidt 1d66e1f981 Rework wishbone slave address decoding
Don't make it synchronous, no latches

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
5 years ago
Benjamin Herrenschmidt c97b080d8c Move wishbone arbiter out of the core
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
5 years ago
Benjamin Herrenschmidt 310a56c076 Re-indent and reformat soc.vhdl
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
5 years ago
Benjamin Herrenschmidt a69a93b466 Split FPGA toplevel from soc
This will be useful when we start needing different toplevels for
different boards.

We keep the reset and clock generators in the toplevel as they will
eventually be taken over by litedram when we integrate it, and they
are more likely to change on different system types.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
5 years ago
Anton Blanchard 5ee86e7621
Merge pull request #39 from antonblanchard/no-x-state
Don't send out X state from the memory behavioural
5 years ago
Anton Blanchard dce2e06f4c Don't send out X state from the memory behavioural
Just send out all 1s.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
5 years ago
Anton Blanchard c3a5782bf4
Merge pull request #36 from mikey/gitignore
Add new files to git ignore
5 years ago
Anton Blanchard 419b95a447
Merge pull request #38 from antonblanchard/multiply-warn
Quieten multiply warning
5 years ago
Anton Blanchard a22afbdb5b Quieten multiply warning
We no longer gate multiply with the valid signal, so it's complaining
a lot. Comment out the warning.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
5 years ago
Michael Neuling 5ae92a721f Add new files to git ignore
Signed-off-by: Michael Neuling <mikey@neuling.org>
5 years ago
Anton Blanchard d79c994158
Merge pull request #35 from antonblanchard/multiply-opt
Simplify multiply
5 years ago
Anton Blanchard 18b9b39a2c Simplify multiply
No need to gate everything with the valid bit.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
5 years ago
Anton Blanchard 47f39440f2
Merge pull request #34 from antonblanchard/decode-table
Decode table
5 years ago
Anton Blanchard 9687034d78 Add a decode bit to mark an instruction as single through the pipeline
This is used by the pipelining patches. Mark everyone as single through
the pipeline to start.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
5 years ago
Benjamin Herrenschmidt b0ade2857f decode1 array fix header
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
5 years ago
Anton Blanchard a9065796ad
Merge pull request #33 from antonblanchard/cr-fix
Fix CR forwarding
5 years ago
Anton Blanchard e0dfb3dce1
Merge pull request #32 from antonblanchard/register-file-forwarding
Add forwarding in the register file
5 years ago
Benjamin Herrenschmidt 8bfd6e5eae Use simulated UART in core test bench
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
5 years ago
Benjamin Herrenschmidt 1b9c6f4647 Make sim poll non-blocking
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
5 years ago
Benjamin Herrenschmidt 48b689b665 Add simulated UART design
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
5 years ago
Anton Blanchard 9cbdecb561 Fix CR forwarding
We weren't actually forwarding writes in the same cycle. Not a
problem right now, but noticed when testing the pipelining series.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
5 years ago
Anton Blanchard 79a14c8e37 Add forwarding in the register file
We need this for the upcoming pipelining patches.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
5 years ago
Anton Blanchard 2241b71674
Merge pull request #31 from antonblanchard/no-second-write-port-2
More second write port removal
5 years ago
Anton Blanchard 045a00c5d7
Merge pull request #30 from antonblanchard/writeback-assert
Add some assertions to writeback
5 years ago
Anton Blanchard 31a6fb6ef5 More second write port removal
I missed the register file updates for the second write port
removal.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
5 years ago
Anton Blanchard fa04936c92 Add some assertions to writeback
We want to make sure we never complete more than one
instruction per cycle, or write back more than one GPR
or CR per cycle.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
5 years ago
Anton Blanchard 4c872619b3
Merge pull request #29 from antonblanchard/no-second-write-port
Remove second write port
5 years ago
Anton Blanchard f384f504a1
Merge pull request #28 from antonblanchard/loadstore-cleanup
Remove some more loadstore debug
5 years ago
Anton Blanchard fb4cad6eaf Remove second write port
We only need two write ports for load with update instructions.
Having two write ports just for this instruction is expensive.

For now we will force them to be the only instruction in the
pipeline, and take two cycles of writeback.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
5 years ago
Anton Blanchard aee5fded44 Remove some more loadstore debug
Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
5 years ago
Anton Blanchard ff9070d727
Merge pull request #27 from antonblanchard/fix-cr
Fix issues with CR rework
5 years ago