{"id":3775,"date":"2014-07-17T16:07:39","date_gmt":"2014-07-17T06:07:39","guid":{"rendered":"https:\/\/www.flamingspork.com\/blog\/?p=3775"},"modified":"2014-07-17T16:07:39","modified_gmt":"2014-07-17T06:07:39","slug":"openpower-firmware-up-on-github","status":"publish","type":"post","link":"https:\/\/www.flamingspork.com\/blog\/2014\/07\/17\/openpower-firmware-up-on-github\/","title":{"rendered":"OpenPower firmware up on github!"},"content":{"rendered":"

With the whole OpenPower<\/a> thing, a lot of low level firmware is being open sourced, which is really exciting for the platform – the less proprietary code sitting in memory the better in my books.<\/p>\n

If you go to https:\/\/github.com\/open-power <\/a>you’ll see code for a bunch of the low level firmware for OpenPower and POWER8.<\/p>\n

Hostboot is the bit of code that brings up the CPU and skiboot both sets up hardware and provides runtime services to Linux (such as talking to the service processor, if one is present).<\/p>\n

Patches to https:\/\/github.com\/open-power\/skiboot\/blob\/master\/doc\/overview.txt <\/a>are (of course) really quite welcome. It shouldn’t be too hard to get your head around the basics.<\/p>\n

To see the Linux side of the OPAL interface, go check out linux\/arch\/powerpc\/platforms\/powernv<\/a> -there you can see how we ask OPAL to do things for us.<\/p>\n

If you buy a POWER8 system from IBM running PowerKVM you’re running this code.<\/p>\n","protected":false},"excerpt":{"rendered":"

With the whole OpenPower thing, a lot of low level firmware is being open sourced, which is really exciting for the platform – the less proprietary code sitting in memory the better in my books. If you go to https:\/\/github.com\/open-power … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[76,570,8],"tags":[586,585,589,141,636,587,568,584],"class_list":["post-3775","post","type-post","status-publish","format-standard","hentry","category-code","category-ibm-work-et-al","category-linux-kernel","tag-firmware","tag-hostboot","tag-kernel","tag-linux","tag-opal","tag-openpower","tag-power8","tag-skiboot"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p5a6n8-YT","jetpack-related-posts":[{"id":3912,"url":"https:\/\/www.flamingspork.com\/blog\/2014\/12\/03\/running-skiboot-opal-on-the-power8-simulator\/","url_meta":{"origin":3775,"position":0},"title":"Running skiboot (OPAL) on the POWER8 Simulator","author":"Stewart Smith","date":"2014-12-03","format":false,"excerpt":"skiboot is open source boot and runtime firmware for OpenPOWER. On real POWER8 hardware, you will also need HostBoot to do this (basically, to make the chip work) but in a functional simulator (such as this one released by IBM) you don't need a bunch of hardware procedures to make\u2026","rel":"","context":"In "code"","block_context":{"text":"code","link":"https:\/\/www.flamingspork.com\/blog\/category\/code\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":3965,"url":"https:\/\/www.flamingspork.com\/blog\/2015\/06\/12\/gcov-code-coverage-for-openpower-firmware\/","url_meta":{"origin":3775,"position":1},"title":"gcov code coverage for OpenPower firmware","author":"Stewart Smith","date":"2015-06-12","format":false,"excerpt":"For skiboot (which provides the OPAL boot and runtime firmware for OpenPower machines), I've been pretty interested at getting some automated code coverage data for booting on real hardware (as well as in a simulator). Why? Well, it's useful to see that various test suites are actually testing what you\u2026","rel":"","context":"In "code"","block_context":{"text":"code","link":"https:\/\/www.flamingspork.com\/blog\/category\/code\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":3940,"url":"https:\/\/www.flamingspork.com\/blog\/2015\/02\/03\/building-openpower-firmware-for-use-in-power8-simulator\/","url_meta":{"origin":3775,"position":2},"title":"Building OpenPower firmware for use in POWER8 Simulator","author":"Stewart Smith","date":"2015-02-03","format":false,"excerpt":"Previously, I blogged on how to Run skiboot (OPAL) on the POWER8 Simulator. If you want to build the full Open Power firmware environment, including the Petitboot bootloader and kernel, you can now do so! My pull request for an op-build target for the simulator has been merged, so you\u2026","rel":"","context":"In "code"","block_context":{"text":"code","link":"https:\/\/www.flamingspork.com\/blog\/category\/code\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":4345,"url":"https:\/\/www.flamingspork.com\/blog\/2017\/12\/11\/a-simplified-view-of-openpower-firmware-development\/","url_meta":{"origin":3775,"position":3},"title":"A (simplified) view of OpenPOWER Firmware Development","author":"Stewart Smith","date":"2017-12-11","format":false,"excerpt":"I've been working on trying to better document the whole flow of code that goes into a build of firmware for an OpenPOWER machine. This is partially to help those not familiar with it get a better grasp of the sheer scale of what goes into that 32\/64MB of flash.\u2026","rel":"","context":"In "code"","block_context":{"text":"code","link":"https:\/\/www.flamingspork.com\/blog\/category\/code\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.flamingspork.com\/blog\/wp-content\/uploads\/2017\/12\/devflow-legend.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.flamingspork.com\/blog\/wp-content\/uploads\/2017\/12\/devflow-legend.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/www.flamingspork.com\/blog\/wp-content\/uploads\/2017\/12\/devflow-legend.png?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/www.flamingspork.com\/blog\/wp-content\/uploads\/2017\/12\/devflow-legend.png?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":3972,"url":"https:\/\/www.flamingspork.com\/blog\/2015\/06\/16\/opal-firmware-specification-conformance-and-documentation\/","url_meta":{"origin":3775,"position":4},"title":"OPAL firmware specification, conformance and documentation","author":"Stewart Smith","date":"2015-06-16","format":false,"excerpt":"Now that we have an increasing amount of things that run on top of OPAL: Linux hello_world (in skiboot tree) ppc64le_hello (as I wrote about yesterday) FreeBSD and that the OpenPower ecosystem is rapidly growing (especially around people building OpenPower machines), the need for more formal specification, conformance testing and\u2026","rel":"","context":"In "code"","block_context":{"text":"code","link":"https:\/\/www.flamingspork.com\/blog\/category\/code\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":4200,"url":"https:\/\/www.flamingspork.com\/blog\/2016\/10\/20\/workaround-for-opal-prd-using-100-cpu\/","url_meta":{"origin":3775,"position":5},"title":"Workaround for opal-prd using 100% CPU","author":"Stewart Smith","date":"2016-10-20","format":false,"excerpt":"opal-prd is the Processor RunTime Diagnostics daemon, the userspace process that on OpenPower systems is responsible for some of the runtime diagnostics. 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