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fpu-init
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icache-insn-u-state
dcache-unused-sig
unused-sig
divider-init
loadstore-pmu-init
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alt-reset-address
log2ceil-issue
fpu-constant
asic-3
boxarty-20211011
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cache-tlb-parameters-2
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143 Commits (6e442e07a54c73b0778bfd07c96666ff36395d15)
 

Author SHA1 Message Date
Anton Blanchard 6e442e07a5 Reformat loadstore2 
Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
 5 years ago
Anton Blanchard e1a71e4545 loads don't do both byte reversal and sign extension 
Give the synthesis tools a clue that we don't need to do both byte reversal
and sign extension.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
 5 years ago
Anton Blanchard 550b2b8608
Merge pull request #62 from antonblanchard/byte-reverse-store-opt 
Move byte reversal of stores to first cycle
 5 years ago
Anton Blanchard 135805d2ac
Merge pull request #61 from antonblanchard/execute-cleanup 
execute1 no longer needs sim_console
 5 years ago
Anton Blanchard a061924a78 Move byte reversal of stores to first cycle 
We are seeing some timing issues with the second cycle of loadstore,
and  we aren't doing much in the first cycle, so move it here.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
 5 years ago
Anton Blanchard 6d85920068 execute1 no longer needs sim_console 
Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
 5 years ago
Anton Blanchard a4c8dd860a
Merge pull request #60 from antonblanchard/testbenches 
Add a few more test benches
 5 years ago
Anton Blanchard 1b6eef2a5d Fix multiply_tb 
Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
 5 years ago
Anton Blanchard 1e3e16e500 Add an icache testbench 
Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
 5 years ago
Anton Blanchard d573748da0
Merge pull request #56 from antonblanchard/writeback-fix3 
Remove cycle in writeback
 5 years ago
Anton Blanchard 152261fac8 Remove cycle in writeback 
The pipeline had a cycle in writeback. Writeback is pretty
simple and unlikely to be a bottleneck, so lets remove it.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
 5 years ago
Anton Blanchard 7bb88d5321
Merge pull request #59 from antonblanchard/trap-decode 
Fix make check
 5 years ago
Anton Blanchard f5a5b91736
Merge pull request #58 from antonblanchard/decode2-assert 
Fix spurious outstanding assert
 5 years ago
Anton Blanchard 427effdaa9 Fix make check 
We need to finish support for all the trap instructions, but for now
we at least need a decode entry for tw, so we know to stall until the
previous instruction completes. Some of our test cases were failing
because the trap executed before the previous instruction completed.

All these trap instructions need to be resolved at completion, not
in execute.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
 5 years ago
Anton Blanchard d813ffb748 Fix spurious outstanding assert 
Check it in the sequential process, not the combinatorial one.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
 5 years ago
Anton Blanchard 30aa16d8f3
Merge pull request #57 from antonblanchard/add-nop 
Add a decode for the nop instruction
 5 years ago
Anton Blanchard 9867fb6149 Add a decode for the nop instruction 
We want these to go out without any GPR dependencies, so add
a specific entry in decode for them.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
 5 years ago
Anton Blanchard 85062793b1
Merge pull request #55 from antonblanchard/fetch-fix 
Add a default value for RESET_ADDRESS
 5 years ago
Anton Blanchard d52046104f Add a default value for RESET_ADDRESS 
Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
 5 years ago
Anton Blanchard 71e45a82ee
Merge pull request #51 from antonblanchard/writeback-fix 
Some writeback updates
 5 years ago
Anton Blanchard e69e79d8af Reformat writeback.vhdl 
Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
 5 years ago
Anton Blanchard 50a361a5dc Exit if we try to write more than one GPR or CR in a cycle 
Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
 5 years ago
Anton Blanchard ab34c48392
Merge pull request #50 from antonblanchard/decode1-opt 
No need to gate nia or insn in decode1
 5 years ago
Anton Blanchard acdb2ea157 No need to gate nia or insn in decode1 
Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
 5 years ago
Anton Blanchard 0e6861e5db
Merge pull request #49 from antonblanchard/icache-2 
Add a simple direct mapped icache
 5 years ago
Anton Blanchard 89849a6856 Add a simple direct mapped icache 
Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
 5 years ago
Anton Blanchard 6cbf456388 SOC memory wishbone should clear ACK regardless of STB 
The memory wishbone doesn't clear ACK and move the state machine on
until STB is de-asserted. This seems like it isn't compliant with
the spec and results in a maximum throughput of 1 transfer every
3 cycles.

Fixing this improves the situation to one transfer every 2 cycles.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
 5 years ago
Anton Blanchard 67446709ca
Merge pull request #48 from antonblanchard/clk_gen_bypass 
Fix clk_gen_bypass
 5 years ago
Anton Blanchard d89a9929fd Fix clk_gen_bypass 
I broke clk_gen_bypass when updating the SOC reset code.

Fixes 03fd06deaf ("Rework SOC reset")
Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
 5 years ago
Anton Blanchard 80aa781454
Merge pull request #47 from antonblanchard/if-fix 
Explicitly check against '1' in if statements
 5 years ago
Anton Blanchard ca6f84efd6
Merge pull request #46 from antonblanchard/record-fix 
Remove names from end record statements
 5 years ago
Anton Blanchard b9e28598b4 Explicitly check against '1' in if statements 
nvc doesn't like what I think is a VHDL 2008 construct. Lets just
check against '1' explicitly.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
 5 years ago
Anton Blanchard 142a722ce4 Remove names from end record statements 
These are optional, and vhdlpp from iverilog barfs on them.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
 5 years ago
Anton Blanchard 43f81773b4
Merge pull request #45 from antonblanchard/fixes 
Fix a couple of issues in the recent pipelining merge
 5 years ago
Anton Blanchard 7caf71ba71 Fix issue in loadstore1 
We weren't using the register in this stage.

Fixes: 819f820090 ("Register outputs on loadstore1")
Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
 5 years ago
Anton Blanchard 95442cd62c Fix issue in execute2 
We weren't using the register in this stage.

Fixes: c7aa683ba8 ("Register outputs on execute2")
Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
 5 years ago
Anton Blanchard 1ba84b56dd
Merge pull request #44 from antonblanchard/nia-remove 
Remove nia from loadstore and multiply
 5 years ago
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