# Source for E300 Corecomplex

**URL:** https://forums.sifive.com/t/source-for-e300-corecomplex/101
**Category:** Freedom E300
**Created:** [September 16, 2016, 5:15pm UTC](https://forums.sifive.com/t/source-for-e300-corecomplex/101 "2016-09-16T17:15:49Z")
**Posts on this page:** 16
**Page:** 1

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### Author: ![girish](https://avatars.discourse-cdn.com/v4/letter/g/e36b37/32.png) [@girish](https://forums.sifive.com/u/girish)
#### Post date: [September 16, 2016, 5:15pm UTC](https://forums.sifive.com/t/source-for-e300-corecomplex/101/1 "2016-09-16T17:15:49Z")

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Hi Folks,

Can you please let me know if the sources for E300 is available for us to tinker around ?

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### Author: ![girish](https://avatars.discourse-cdn.com/v4/letter/g/e36b37/32.png) [@girish](https://forums.sifive.com/u/girish)
#### Post date: [September 19, 2016, 11:18am UTC](https://forums.sifive.com/t/source-for-e300-corecomplex/101/2 "2016-09-19T11:18:57Z")

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Just to clarify, this is assuming that the business model is to provide open source implementation of SoC with SiFive providing design services for customer specific enhancement. Please let me know if my understanding is correct ?

Regards,  
Girish

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### Author: ![jackckang](https://sea2.discourse-cdn.com/flex020/user_avatar/forums.sifive.com/jackckang/32/831_2.png) [@jackckang](https://forums.sifive.com/u/jackckang)
#### Post date: [September 20, 2016, 3:10am UTC](https://forums.sifive.com/t/source-for-e300-corecomplex/101/3 "2016-09-20T03:10:19Z")

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Your understanding is correct.

We are working on some of the development and also defining and cleaning up the open-source repositories. Much of the work in progress exists at [https://github.com/ucb-bar/rocket-chip](https://github.com/ucb-bar/rocket-chip), which has traditionally been a repository for just the CPU coreplex, so you can look there for a preview.

But we understand that that repository is not well organized and defined for a SoC, so it’s something we are actively working on improving.

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### Author: ![girish](https://avatars.discourse-cdn.com/v4/letter/g/e36b37/32.png) [@girish](https://forums.sifive.com/u/girish)
#### Post date: [September 20, 2016, 8:55am UTC](https://forums.sifive.com/t/source-for-e300-corecomplex/101/4 "2016-09-20T08:55:54Z")

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Thanks for the info. Do you have an ETA on the SoC repo ?

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### Author: ![jackckang](https://sea2.discourse-cdn.com/flex020/user_avatar/forums.sifive.com/jackckang/32/831_2.png) [@jackckang](https://forums.sifive.com/u/jackckang)
#### Post date: [September 20, 2016, 6:40pm UTC](https://forums.sifive.com/t/source-for-e300-corecomplex/101/5 "2016-09-20T18:40:31Z")

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We are working hard to have this ready by early to mid October.

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<div class="post-metadata">

### Author: ![girish](https://avatars.discourse-cdn.com/v4/letter/g/e36b37/32.png) [@girish](https://forums.sifive.com/u/girish)
#### Post date: [October 7, 2016, 6:25pm UTC](https://forums.sifive.com/t/source-for-e300-corecomplex/101/6 "2016-10-07T18:25:41Z")

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Jack - Just wanted to follow up to check if the plans are still on track to open the SoC repo by mid October ?

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<div class="post-metadata">

### Author: ![jackckang](https://sea2.discourse-cdn.com/flex020/user_avatar/forums.sifive.com/jackckang/32/831_2.png) [@jackckang](https://forums.sifive.com/u/jackckang)
#### Post date: [October 25, 2016, 6:44am UTC](https://forums.sifive.com/t/source-for-e300-corecomplex/101/7 "2016-10-25T06:44:54Z")

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We had set a target of getting the source code out by the middle of October, but clearly we have not met that goal.  
It has turned out to be a bit more challenging than we thought–we need to ensure the right legal frameworks are in place so that people can use the code freely and also feel comfortable providing commits and updates as they see fit.

At SiFive, we are fully committed to doing this. We appreciate your patience as we work through it and will continue to update everybody here.

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### Author: ![mwachs5](https://sea2.discourse-cdn.com/flex020/user_avatar/forums.sifive.com/mwachs5/32/13_2.png) [@mwachs5](https://forums.sifive.com/u/mwachs5)
#### Post date: [December 1, 2016, 4:11pm UTC](https://forums.sifive.com/t/source-for-e300-corecomplex/101/8 "2016-12-01T16:11:04Z")

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The code is now Open-Source! Please check out [https://github.com/sifive/freedom](https://github.com/sifive/freedom) for the Open Source code used on our FE310 chip , and the FPGA development kits for E300 and U500.

Have fun!  
Megan

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### Author: ![jdoege](https://avatars.discourse-cdn.com/v4/letter/j/c37758/32.png) [@jdoege](https://forums.sifive.com/u/jdoege)
#### Post date: [December 1, 2016, 4:31pm UTC](https://forums.sifive.com/t/source-for-e300-corecomplex/101/9 "2016-12-01T16:31:01Z")

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Will you please also release the gate-level netlist for the FE310?

– Jason Doege

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### Author: ![terpstra](https://avatars.discourse-cdn.com/v4/letter/t/7c8e57/32.png) [@terpstra](https://forums.sifive.com/u/terpstra)
#### Post date: [December 1, 2016, 5:09pm UTC](https://forums.sifive.com/t/source-for-e300-corecomplex/101/10 "2016-12-01T17:09:43Z")

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Would the net list for the FPGA version be sufficient?

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### Author: ![jdoege](https://avatars.discourse-cdn.com/v4/letter/j/c37758/32.png) [@jdoege](https://forums.sifive.com/u/jdoege)
#### Post date: [December 1, 2016, 9:37pm UTC](https://forums.sifive.com/t/source-for-e300-corecomplex/101/11 "2016-12-01T21:37:21Z")

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No, the FPGA netlist would not be sufficient (and is easily available independently, anyway.)

It would be very useful to have an openly available SoC gate-level netlist. No timing information would be necessary so you wouldn’t have to violate any foundry library IP restrictions, I think. One of the things I would be very interested in is the scan-based testability of the device, if you implemented that (and, if not, how exactly did/do you assure manufacturing quality?) This kind of information is usually only available within corporate environments and would be very interesting, especially to academic institutions.

Best regards,  
Jason

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<div class="post-metadata">

### Author: ![jackckang](https://sea2.discourse-cdn.com/flex020/user_avatar/forums.sifive.com/jackckang/32/831_2.png) [@jackckang](https://forums.sifive.com/u/jackckang)
#### Post date: [December 3, 2016, 9:11am UTC](https://forums.sifive.com/t/source-for-e300-corecomplex/101/12 "2016-12-03T09:11:04Z")

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Hi Jason,

We have no plans to open source the gate-level netlist.

-Jack

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### Author: ![Krste](https://sea2.discourse-cdn.com/flex020/user_avatar/forums.sifive.com/krste/32/11_2.png) [@Krste](https://forums.sifive.com/u/Krste)
#### Post date: [December 5, 2016, 4:57am UTC](https://forums.sifive.com/t/source-for-e300-corecomplex/101/13 "2016-12-05T04:57:44Z")

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Please read my response in the [Coreplex IP](http://forums.sifive.com/t/information-on-coreplex-ip-access/105/2?u=krste) thread about why SiFive only supports the open-source Chisel code base in these forums. The community is welcome to generate Verilog and gate netlists from our Chisel code base, and to share these with others.

Krste

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### Author: ![dagema](https://sea2.discourse-cdn.com/flex020/user_avatar/forums.sifive.com/dagema/32/59_2.png) [@dagema](https://forums.sifive.com/u/dagema)
#### Post date: [December 19, 2016, 5:23pm UTC](https://forums.sifive.com/t/source-for-e300-corecomplex/101/14 "2016-12-19T17:23:58Z")

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> [@mwachs5](#):
>
> The code is now Open-Source! Please check out [GitHub - sifive/freedom: Source files for SiFive's Freedom platforms](https://github.com/sifive/freedom) for the Open Source code used on our FE310 chip , and the FPGA development kits for E300 and U500.
> 
> Have fun!Megan

Hi Megan,

I am getting errors running he Makefile corresponding to the Freedom E310 Arty FPGA Dev Kit:

> download failed: org.scala-sbt#main;0.13.11!main.jar  
> download failed: org.scala-sbt#actions;0.13.11!actions.jar  
> download failed: org.scala-sbt#io;0.13.11!io.jar  
> download failed: org.scala-sbt#completion;0.13.11!completion.jar  
> download failed: org.scala-sbt#collections;0.13.11!collections.jar  
> download failed: org.scala-sbt#api;0.13.11!api.jar  
> download failed: org.scala-sbt#incremental-compiler;0.13.11!incremental-compiler.jar  
> download failed: org.scala-sbt#compile;0.13.11!compile.jar  
> download failed: org.scala-sbt#ivy;0.13.11!ivy.jar  
> download failed: org.scala-sbt#main-settings;0.13.11!main-settings.jar  
> download failed: org.scala-sbt#command;0.13.11!command.jar  
> download failed: org.scala-sbt#compiler-interface;0.13.11!compiler-interface.jar  
> Error during sbt execution: Error retrieving required libraries  
> (see /root/.sbt/boot/update.log for complete log)  
> Error: Could not retrieve sbt 0.13.11  
> Makefile:23: recipe for target ‘/home/donnie/SiFive/freedom/rocket-chip/firrtl/utils/bin/firrtl.jar’ failed  
> make[1]: \*\*\* [/home/donnie/SiFive/freedom/rocket-chip/firrtl/utils/bin/firrtl.jar] Error 1  
> make[1]: Leaving directory ‘/home/donnie/SiFive/freedom/rocket-chip/firrtl’  
> common.mk:26: recipe for target ‘/home/donnie/SiFive/freedom/rocket-chip/firrtl/utils/bin/firrtl.jar’ failed  
> make: \*\*\* [/home/donnie/SiFive/freedom/rocket-chip/firrtl/utils/bin/firrtl.jar] Error 2

The referenced logfile is telling me this:

> setting ‘ivy.default.settings.dir’ to ‘jar:file:/home/donnie/SiFive/freedom/rocket-chip/sbt-launch.jar!/org/apache/ivy/core/settings’  
> setting ‘ivy.basedir’ to ‘/home/donnie/SiFive/freedom/rocket-chip/firrtl/.’  
> setting ‘ivy.default.conf.dir’ to ‘jar:file:/home/donnie/SiFive/freedom/rocket-chip/sbt-launch.jar!/org/apache/ivy/core/settings’  
> impossible to define new type: class not found: org.apache.ivy.plugins.resolver.SshResolver in nor Ivy classloader  
> impossible to define new type: class not found: org.apache.ivy.plugins.resolver.VsftpResolver in nor Ivy classloader  
> impossible to define new type: class not found: org.apache.ivy.plugins.version.PatternVersionMatcher in nor Ivy classloader  
> impossible to define new type: class not found: org.apache.ivy.plugins.trigger.LogTrigger in nor Ivy classloader  
> impossible to define new type: class not found: org.apache.ivy.ant.AntBuildTrigger in nor Ivy classloader  
> impossible to define new type: class not found: org.apache.ivy.plugins.resolver.IvyRepResolver in nor Ivy classloader  
> impossible to define new type: class not found: org.apache.ivy.plugins.signer.bouncycastle.OpenPGPSignatureGenerator in nor Ivy classloader  
> impossible to define new type: class not found: org.apache.ivy.plugins.conflict.RegexpConflictManager in nor Ivy classloader  
> impossible to define new type: class not found: org.apache.ivy.plugins.resolver.SFTPResolver in nor Ivy classloader  
> impossible to define new type: class not found: org.apache.ivy.osgi.updatesite.UpdateSiteResolver in nor Ivy classloader  
> impossible to define new type: class not found: org.apache.ivy.ant.AntCallTrigger in nor Ivy classloader  
> impossible to define new type: class not found: org.apache.ivy.plugins.resolver.MirroredURLResolver in nor Ivy classloader  
> impossible to define new type: class not found: org.apache.ivy.plugins.resolver.packager.PackagerResolver in nor Ivy classloader  
> impossible to define new type: class not found: org.apache.ivy.plugins.resolver.DualResolver in nor Ivy classloader  
> impossible to define new type: class not found: org.apache.ivy.plugins.resolver.VfsResolver in nor Ivy classloader  
> impossible to define new type: class not found: org.apache.ivy.plugins.resolver.JarResolver in nor Ivy classloader  
> impossible to define new type: class not found: org.apache.ivy.osgi.obr.OBRResolver in nor Ivy classloader  
> impossible to define glob matcher: org.apache.ivy.plugins.matcher.GlobPatternMatcher was not found.  
> setting ‘jline.esc.timeout’ to ‘0’  
> setting ‘java.runtime.name’ to ‘OpenJDK Runtime Environment’  
> setting ‘sun.boot.library.path’ to ‘/usr/lib/jvm/java-9-openjdk-amd64/lib/amd64’  
> …  
> …  
> Module descriptor is processed : org.scala-sbt#test-interface;1.0  
> Module descriptor is processed : org.scala-sbt#apply-macro;0.13.11  
> storing dependency org.scala-sbt#sbt;0.13.11 in props  
> resolved ivy file produced in cache  
> :: downloading artifacts ::  
> [NOT REQUIRED] org.scala-sbt#sbt;0.13.11!sbt.jar  
> [NOT REQUIRED] org.scala-lang#scala-library;2.10.6!scala-library.jar  
> local: no namespace defined: using system  
> trying /root/.ivy2/local/org.scala-sbt/main/0.13.11/jars/main.jar  
> tried /root/.ivy2/local/org.scala-sbt/main/0.13.11/jars/main.jar  
> local: resource not reachable for org.scala-sbt#main;0.13.11: res=/root/.ivy2/local/org.scala-sbt/main/0.13.11/jars/main.jar  
> Maven Central: no namespace defined: using system  
> trying [https://repo1.maven.org/maven2/org/scala-sbt/main/0.13.11/main-0.13.11.jar](https://repo1.maven.org/maven2/org/scala-sbt/main/0.13.11/main-0.13.11.jar)  
> tried [https://repo1.maven.org/maven2/org/scala-sbt/main/0.13.11/main-0.13.11.jar](https://repo1.maven.org/maven2/org/scala-sbt/main/0.13.11/main-0.13.11.jar)  
> HTTP response status: 404 url=[https://repo1.maven.org/maven2/org/scala-sbt/main/0.13.11/main-0.13.11.jar](https://repo1.maven.org/maven2/org/scala-sbt/main/0.13.11/main-0.13.11.jar)  
> CLIENT ERROR: Not Found url=[https://repo1.maven.org/maven2/org/scala-sbt/main/0.13.11/main-0.13.11.jar](https://repo1.maven.org/maven2/org/scala-sbt/main/0.13.11/main-0.13.11.jar)  
> Maven Central: resource not reachable for org/scala-sbt#main;0.13.11: res=[https://repo1.maven.org/maven2/org/scala-sbt/main/0.13.11/main-0.13.11.jar](https://repo1.maven.org/maven2/org/scala-sbt/main/0.13.11/main-0.13.11.jar)  
> typesafe-ivy-releases: no namespace defined: using system  
> trying [JFrog](https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/main/0.13.11/jars/main.jar)  
> tried [JFrog](https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/main/0.13.11/jars/main.jar)  
> downloading [JFrog](https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/main/0.13.11/jars/main.jar) …  
> typesafe-ivy-releases: downloading [JFrog](https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/main/0.13.11/jars/main.jar)  
> to /root/.ivy2/cache/org.scala-sbt/main/jars/main-0.13.11.jar.part  
> WARN: [FAILED] org.scala-sbt#main;0.13.11!main.jar: sun.security.validator.ValidatorException: **No trusted certificate found (1671ms)**  
> sbt-ivy-snapshots: no namespace defined: using system  
> trying [https://repo.scala-sbt.org/scalasbt/ivy-snapshots/org.scala-sbt/main/0.13.11/jars/main.jar](https://repo.scala-sbt.org/scalasbt/ivy-snapshots/org.scala-sbt/main/0.13.11/jars/main.jar)  
> tried [https://repo.scala-sbt.org/scalasbt/ivy-snapshots/org.scala-sbt/main/0.13.11/jars/main.jar](https://repo.scala-sbt.org/scalasbt/ivy-snapshots/org.scala-sbt/main/0.13.11/jars/main.jar)  
> HTTP response status: 404 url=[https://repo.scala-sbt.org/scalasbt/ivy-snapshots/org.scala-sbt/main/0.13.11/jars/main.jar](https://repo.scala-sbt.org/scalasbt/ivy-snapshots/org.scala-sbt/main/0.13.11/jars/main.jar)  
> CLIENT ERROR: Not Found url=[https://repo.scala-sbt.org/scalasbt/ivy-snapshots/org.scala-sbt/main/0.13.11/jars/main.jar](https://repo.scala-sbt.org/scalasbt/ivy-snapshots/org.scala-sbt/main/0.13.11/jars/main.jar)  
> sbt-ivy-snapshots: resource not reachable for org.scala-sbt#main;0.13.11: res=[https://repo.scala-sbt.org/scalasbt/ivy-snapshots/org.scala-sbt/main/0.13.11/jars/main.jar](https://repo.scala-sbt.org/scalasbt/ivy-snapshots/org.scala-sbt/main/0.13.11/jars/main.jar)  
> WARN: [FAILED] org.scala-sbt#main;0.13.11!main.jar: (0ms)  
> WARN: ==== local: tried  
> WARN: /root/.ivy2/local/org.scala-sbt/main/0.13.11/jars/main.jar  
> WARN: ==== Maven Central: tried  
> WARN: [https://repo1.maven.org/maven2/org/scala-sbt/main/0.13.11/main-0.13.11.jar](https://repo1.maven.org/maven2/org/scala-sbt/main/0.13.11/main-0.13.11.jar)  
> WARN: ==== typesafe-ivy-releases: tried  
> WARN: [JFrog](https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/main/0.13.11/jars/main.jar)  
> WARN: ==== sbt-ivy-snapshots: tried  
> WARN: [https://repo.scala-sbt.org/scalasbt/ivy-snapshots/org.scala-sbt/main/0.13.11/jars/main.jar](https://repo.scala-sbt.org/scalasbt/ivy-snapshots/org.scala-sbt/main/0.13.11/jars/main.jar)  
> trying /root/.ivy2/local/org.scala-sbt/compiler-interface/0.13.11/jars/compiler-interface.jar  
> WARN: [https://repo.scala-sbt.org/scalasbt/ivy-snapshots/org.scala-sbt/main/0.13.11/jars/main.jar](https://repo.scala-sbt.org/scalasbt/ivy-snapshots/org.scala-sbt/main/0.13.11/jars/main.jar)  
> trying /root/.ivy2/local/org.scala-sbt/compiler-interface/0.13.11/jars/compiler-interface.jar  
> tried /root/.ivy2/local/org.scala-sbt/compiler-interface/0.13.11/jars/compiler-interface.jar  
> local: resource not reachable for org.scala-sbt#compiler-interface;0.13.11: res=/root/.ivy2/local/org.scala-sbt/compiler-interface/0.13.11/jars/compiler-interface.jar  
> trying [https://repo1.maven.org/maven2/org/scala-sbt/compiler-interface/0.13.11/compiler-interface-0.13.11.jar](https://repo1.maven.org/maven2/org/scala-sbt/compiler-interface/0.13.11/compiler-interface-0.13.11.jar)  
> tried [https://repo1.maven.org/maven2/org/scala-sbt/compiler-interface/0.13.11/compiler-interface-0.13.11.jar](https://repo1.maven.org/maven2/org/scala-sbt/compiler-interface/0.13.11/compiler-interface-0.13.11.jar)  
> HTTP response status: 404 url=[https://repo1.maven.org/maven2/org/scala-sbt/compiler-interface/0.13.11/compiler-interface-0.13.11.jar](https://repo1.maven.org/maven2/org/scala-sbt/compiler-interface/0.13.11/compiler-interface-0.13.11.jar)  
> CLIENT ERROR: Not Found url=[https://repo1.maven.org/maven2/org/scala-sbt/compiler-interface/0.13.11/compiler-interface-0.13.11.jar](https://repo1.maven.org/maven2/org/scala-sbt/compiler-interface/0.13.11/compiler-interface-0.13.11.jar)  
> Maven Central: resource not reachable for org/scala-sbt#compiler-interface;0.13.11: res=[https://repo1.maven.org/maven2/org/scala-sbt/compiler-interface/0.13.11/compiler-interface-0.13.11.jar](https://repo1.maven.org/maven2/org/scala-sbt/compiler-interface/0.13.11/compiler-interface-0.13.11.jar)  
> trying [JFrog](https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/compiler-interface/0.13.11/jars/compiler-interface.jar)  
> tried [JFrog](https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/compiler-interface/0.13.11/jars/compiler-interface.jar)  
> downloading [JFrog](https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/compiler-interface/0.13.11/jars/compiler-interface.jar) …  
> typesafe-ivy-releases: downloading [JFrog](https://repo.typesafe.com/typesafe/ivy-releases/org.scala-sbt/compiler-interface/0.13.11/jars/compiler-interface.jar)  
> to /root/.ivy2/cache/org.scala-sbt/compiler-interface/jars/compiler-interface-0.13.11.jar.part  
> WARN: [FAILED] org.scala-sbt#compiler-interface;0.13.11!compiler-interface.jar: sun.security.validator.ValidatorException: No trusted certificate found (1202ms)  
> trying [https://repo.scala-sbt.org/scalasbt/ivy-snapshots/org.scala-sbt/compiler-interface/0.13.11/jars/compiler-interface.jar](https://repo.scala-sbt.org/scalasbt/ivy-snapshots/org.scala-sbt/compiler-interface/0.13.11/jars/compiler-interface.jar)  
> tried [https://repo.scala-sbt.org/scalasbt/ivy-snapshots/org.scala-sbt/compiler-interface/0.13.11/jars/compiler-interface.jar](https://repo.scala-sbt.org/scalasbt/ivy-snapshots/org.scala-sbt/compiler-interface/0.13.11/jars/compiler-interface.jar)  
> HTTP response status: 404 url=[https://repo.scala-sbt.org/scalasbt/ivy-snapshots/org.scala-sbt/compiler-interface/0.13.11/jars/compiler-interface.jar](https://repo.scala-sbt.org/scalasbt/ivy-snapshots/org.scala-sbt/compiler-interface/0.13.11/jars/compiler-interface.jar)  
> CLIENT ERROR: Not Found url=[https://repo.scala-sbt.org/scalasbt/ivy-snapshots/org.scala-sbt/compiler-interface/0.13.11/jars/compiler-interface.jar](https://repo.scala-sbt.org/scalasbt/ivy-snapshots/org.scala-sbt/compiler-interface/0.13.11/jars/compiler-interface.jar)  
> sbt-ivy-snapshots: resource not reachable for org.scala-sbt#compiler-interface;0.13.11: res=[https://repo.scala-sbt.org/scalasbt/ivy-snapshots/org.scala-sbt/compiler-interface/0.13.11/jars/comp$](https://repo.scala-sbt.org/scalasbt/ivy-snapshots/org.scala-sbt/compiler-interface/0.13.11/jars/comp$)  
> WARN: [FAILED] org.scala-sbt#compiler-interface;0.13.11!compiler-interface.jar: (0ms)

> …

with the same “No trusted certificate found” error sequence being repeated on each of the download attempts.

Do I need some kind of authorization not mentioned in the freedom Readme.md?

Thanks for any help.

---

<div class="post-metadata">

### Author: ![rxia](https://avatars.discourse-cdn.com/v4/letter/r/c67d28/32.png) [@rxia](https://forums.sifive.com/u/rxia)
#### Post date: [December 19, 2016, 6:57pm UTC](https://forums.sifive.com/t/source-for-e300-corecomplex/101/15 "2016-12-19T18:57:27Z")

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It looks like this is an issue with running sbt on OpenJDK 9. [http://stackoverflow.com/a/40165934](http://stackoverflow.com/a/40165934) says that you can resolve this by uninstalling OpenJDK 9 and installing OpenJDK 8.

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### Author: ![dagema](https://sea2.discourse-cdn.com/flex020/user_avatar/forums.sifive.com/dagema/32/59_2.png) [@dagema](https://forums.sifive.com/u/dagema)
#### Post date: [December 19, 2016, 8:36pm UTC](https://forums.sifive.com/t/source-for-e300-corecomplex/101/16 "2016-12-19T20:36:24Z")

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> [@rxia](#):
>
> It looks like this is an issue with running sbt on OpenJDK 9. [scala - Exception on download: sun.security.validator.ValidatorException: No trusted certificate found - Stack Overflow](http://stackoverflow.com/a/40165934) says that you can resolve this by uninstalling OpenJDK 9 and installing OpenJDK 8.

That did it. Many thanks for your help.
