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nasa / osal

The Core Flight System (cFS) Operating System Abstraction Layer (OSAL)
Apache License 2.0
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Add generic RTEMS tar file system support #1447

Closed skliper closed 7 months ago

skliper commented 9 months ago

Is your feature request related to a problem? Please describe. Current PC RTEMS workflow creates a fat32 disk image and QEMU command line drive option for runtime access. See: https://github.com/nasa/cFS/blob/main/.github/scripts/rtems-test.mk

Flight systems often utilize flat nonvol memory for boot/startup which can be done using RTEMS support for linking a tared filesystem with the executable and populating the root file system from the tar file at startup.

Describe the solution you'd like Add generic support for RTEMS tar filesystem

Describe alternatives you've considered EEFS is an alternative simple file system, adding RTEMS tar filesystem support doesn't preclude using other options.

Additional context None

Requester Info Jacob Hageman - NASA/GSFC

DavidEdell commented 5 months ago

How do you utilize this new TARFS support?

I can enable it by setting RTEMS_INCLUDE_TARFS, however that results in a link error because the tar file itself is not generated and linked in. I don't see anything committed that would generate the tar file. Is there another piece that has not been pushed/merged?

I'm ultimately looking at getting the latest cfe version running on one of our Leon3 boards.

thanks, -David

skliper commented 5 months ago

We are using it on a Leon3. Along with https://github.com/nasa/PSP/pull/376, we added a "tarfs" target to do the last stage. So the process is to build for the leon3 with the following critical settings:

set(RTEMS_DYNAMIC_LOAD      TRUE)
set(RTEMS_INCLUDE_TARFS     TRUE)

Then we just do a cmake TARGET=tarfs prep. It's kludgy at this point since we just needed something that worked for us, but see https://github.com/nasa/cFE/compare/main...skliper:cFE:EXAMPLE-tarfs. Note I just threw this into the cFE sample_defs to share, it relies on gaisler tools, etc so it won't just work out of the box.