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picorv32
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534 Commits

Author SHA1 Message Date
Clifford Wolf ed1138d6a6 Update riscv-gnu-toolchain to 411d134 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2019-02-19 10:47:53 +01:00
Clifford Wolf 5c081c3291
Merge pull request #111 from stv0g/icebreaker-spram 
Use SPRAM on ICE40UP5K based boards
 2019-02-13 14:13:58 +01:00
Clifford Wolf 358dde2376
Merge branch 'master' into icebreaker-spram 2019-02-13 14:13:23 +01:00
Clifford Wolf 0886cc7562
Merge pull request #104 from thoughtpolice/dev 
Various touchups to scripts/icestorm demo
 2019-02-13 14:10:47 +01:00
Clifford Wolf e9e311d53e
Merge pull request #109 from stv0g/cmd-echo 
Added echo command to PicoSoc firmware for testing UART
 2019-02-13 14:07:08 +01:00
Clifford Wolf 6e55b7afbc
Merge pull request #110 from stv0g/add-torture-readme 
Add readme file for torture test
 2019-02-13 14:06:25 +01:00
Steffen Vogel 3710a86b81 icebreaker: artificially limit available RAM to speed-up simulation 2019-02-12 00:13:33 +01:00
Steffen Vogel eb64df6c3e picosoc: use preprocessor for generating target-specific linker script 2019-02-11 23:44:47 +01:00
Steffen Vogel f3b1246c86 picosoc: added memtest 2019-02-11 23:14:56 +01:00
Steffen Vogel d21937bafc picosoc: increase available memory by using SPRAM instead of BRAM for the Icebreaker example 2019-02-11 23:13:05 +01:00
Steffen Vogel 017f537317 add readme file for torture test (closes #93) 2019-02-11 21:39:15 +01:00
Steffen Vogel 672c99b71e added echo command for testing simpleuart 2019-02-11 21:26:45 +01:00
Austin Seipp 1c7f51ed60 scripts/icestorm: check circuit @ 62MHz 
With arachne-pnr this circuit couldn't hit 60MHz, just barely under it.
OTOH, nextpnr hits about ~68 MHz. So let's set it somewhere inbetween to
make sure this is true over time!

Signed-off-by: Austin Seipp <aseipp@pobox.com>
 2019-01-11 16:49:37 -06:00
Austin Seipp af3b1bb75d scripts/icestorm: dedupe calls to yosys-config 
Signed-off-by: Austin Seipp <aseipp@pobox.com>
 2019-01-11 16:49:18 -06:00
Austin Seipp 770b5bd4c6 scripts/icestorm: add readme 
Notes about how to build proper simulation vs hardware bitstreams.

Signed-off-by: Austin Seipp <aseipp@pobox.com>
 2019-01-11 16:09:07 -06:00
Austin Seipp 13a9edf122 scripts/icestorm: remove unneeded -lgcc 
This freestanding firmware doesn't need anything from the supporting
toolchain.

Signed-off-by: Austin Seipp <aseipp@pobox.com>
 2019-01-11 16:09:07 -06:00
Austin Seipp 2944564ba8 scripts/icestorm: move SHIFT_COUNTER_BITS into Makefile 
This makes it easier to build separate bitstreams for simulation targets
vs the real bitstream for hardware, without editing any source code.

Signed-off-by: Austin Seipp <aseipp@pobox.com>
 2019-01-11 16:09:07 -06:00
Austin Seipp 752790a4d7 scripts/icestorm: comments only 
Signed-off-by: Austin Seipp <aseipp@pobox.com>
 2019-01-11 16:09:07 -06:00
Austin Seipp d711ce527e scripts/icestorm: add 'timing' target 
This dumps a simple IceTime report for the bitstream; we fix the device
package to CT256, corresponding to the HX8K.

Signed-off-by: Austin Seipp <aseipp@pobox.com>
 2019-01-11 16:09:07 -06:00
Austin Seipp 4900ebb693 scripts/icestorm: force -march=rv32i 
The IceStorm example core doesn't include compressed instructions or the
MULT extension; it is an rv32i core, not rv32i[m|c]. If the given
riscv32 toolchain is not explicitly told to generate rv32i code for the
firmware, it may generate invalid instructions which cause a trap during
simulation or on the hardware itself (although CATCH_ILLINSN is set to
zero in this case, too).

Luckily, any rv32i* toolchain (rv32imc for example) can fit the bill
here -- there's no use of libgcc or anything (which might introduce
illegal instructions generated previously) so just forcing the compiler
to generate the right code works nicely.

Signed-off-by: Austin Seipp <aseipp@pobox.com>
 2019-01-11 16:09:07 -06:00
Austin Seipp fc71cadda4 scripts/icestorm: switch to nextpnr-ice40 
nextpnr-ice40 gives a better fMAX for this design (by about ~9Mhz for
me: ~59MHz -> ~68MHz) and is The Way Of The Future.

Signed-off-by: Austin Seipp <aseipp@pobox.com>
 2019-01-11 16:09:07 -06:00
Austin Seipp 070367c88d scripts/icestorm: touch up Makefile a bit 
This touches up the Makefile so that it:

  - uses $@, $< and $^ in more places for brevity and robustness (typo
    guards, etc)
  - tracks dependencies slightly better (e.g. .pcf file changes weren't
    tracked before)

Signed-off-by: Austin Seipp <aseipp@pobox.com>
 2019-01-11 15:59:56 -06:00
Austin Seipp 42b7477ba7 Add shell.nix for Nix-based PicoRV32 development 
The net result of this is that cd'ing into the main source directory and
running:

    $ nix-shell

will get you every tool needed to immediately do RISC-V development with
picorv32 or picosoc (assuming you're targeting ICE40 or ECP5).

The shell.nix file contains many comments on how to use the resulting
environment.

Signed-off-by: Austin Seipp <aseipp@pobox.com>
 2019-01-11 15:58:31 -06:00
Austin Seipp 9bf2fcb410 gitignore: update to ignore verilator artifacts 
Signed-off-by: Austin Seipp <aseipp@pobox.com>
 2019-01-11 13:10:43 -06:00
Clifford Wolf 9b70921103
Merge pull request #102 from emilio93/patch-2 
Update vivado scripts
 2018-11-09 13:03:48 +01:00
Emilio Rojas d7daf9b2cd use 32 bit toolchain 2018-11-08 17:52:05 -06:00
Emilio Rojas 451bf030be update to current vivado version 2018-11-08 17:51:45 -06:00
Clifford Wolf de479b0905
Merge pull request #101 from mmicko/master 
Alignment fix for global symbols fixes #97
 2018-10-30 10:59:07 +01:00
Miodrag Milanovic 2f16c46918 Alignment fix for global symbols fixes #97 2018-10-28 18:48:19 +01:00
Clifford Wolf 3a6ac16259
Merge pull request #94 from hutch31/master 
Added new testbench and linker file for ROM load
 2018-10-19 13:04:41 +02:00
Guy Hutchison 82b44105a0
Merge pull request #1 from cliffordwolf/master 
Fix typo in README.md
 2018-10-18 13:55:02 -07:00
Guy Hutchison 4e766af587 Renamed linker file 2018-10-18 20:52:46 +00:00
Guy Hutchison 5c0e137792 Removed dead code and cleanup before pull request 2018-10-18 20:51:40 +00:00
Guy Hutchison 73318eaeab Removed multiplier/divider 2018-10-18 20:33:40 +00:00
Guy Hutchison f47ac81c89 Passing with custom linker file 2018-10-18 18:47:06 +00:00
Clifford Wolf a721bb0c6e Fix typo in README.md 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-10-17 12:34:49 +02:00
Clifford Wolf ef386e8f17 Add libexpt1-dev to list of Ubuntu packages needed for building tools, closes #88 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-10-02 10:03:40 +02:00
Clifford Wolf cf613d2088
Merge pull request #90 from bobbl/master 
Fix PicoSoC firmware filename for simulation
 2018-10-01 14:22:14 +02:00
Jörg Mische cb766a3757 Fix PicoSoC firmware filename for simulation 2018-10-01 14:00:21 +02:00
Clifford Wolf 0d573311ce
Merge pull request #89 from emilio93/patch-1 
Update Risc-V website link for tools
 2018-09-30 14:27:17 +02:00
Emilio Rojas e507c54058
Update Risc-V website link for tools 
Current link ends up in 404 error
 2018-09-15 12:08:11 -06:00
Clifford Wolf 028aa757df
Merge pull request #85 from olofk/fusesoc-icebreaker 
Add FuseSoC support for icebreaker
 2018-09-03 11:02:01 +02:00
Olof Kindgren 7b9641ad97 Add FuseSoC support for icebreaker 2018-09-02 22:48:47 +02:00
Clifford Wolf 23d7bbdc8b Add rvfi_mode (set to constant 3 = M-mode) 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-08-31 12:21:01 +02:00
Clifford Wolf e3ce4ef800
Merge pull request #82 from mattvenn/master 
fixes for hx8k board demo
 2018-08-31 12:17:41 +02:00
matt venn fabb3eaf70 fix firmware recipes 2018-08-30 22:27:34 +02:00
matt venn fe1867817d fix ifdef to include flash functions for hx8k 2018-08-30 22:27:18 +02:00
Clifford Wolf e9c5831097 Fix chown call in Makefile (for building tools) 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-08-26 18:23:55 +02:00
Clifford Wolf 2d6d5c055b More PicoSoC firmware improvements for icebreaker 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-08-19 14:39:20 +02:00
Clifford Wolf 68c69136b9 Add icebreaker example PicoSoC implementation 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
 2018-08-19 13:38:59 +02:00