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Add description of forward/reverse mode of script

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Joel Sherrill 2012-03-12 07:02:00 -05:00
parent ec942382aa
commit 560eccfb92
1 changed files with 56 additions and 3 deletions
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59
libbsd.txt
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@ -43,14 +43,56 @@ The FreeBSD 8.2 SVN checkout will generally be referred to as the
FreeBSD source in this document. An archive of the FreeBSD 8.2 SVN
archive used is located at http://www.rtems.org/ftp/pub/rtems/people/joel/freebsd
== To Do
== Issues and To Do
* Sebastian Huber: mentioned some simple test code which would verify
that the BSD code/and or USB stack was initialized. This has been
sent to Joel Sherrill and is pending merger.
* Sebastian Huber and Joel Sherrill discussed the need for a a basic USB
functionality test that is known to work on qemu pc.
* Adapt generic IRQ PIC interface code to Simple Vectored Interrupt Model
so that those architectures can use new TCP/IP and USB code.
* in_cksum implementations for architectures not supported by FreeBSD.
This will require figuring out where to put implementations that do
not originate from FreeBSD and are populated via the script.
* generic in_cksum implementation is missing in_cksum_split so currently
cannot be used.
* FreeBSD generic in_cksum implementation is missing in_cksum_split so
currently cannot be used.
* How does one initialize the TCP/IP stack?
* linker section issues: I have undefined symbols for
_bsd__start_set_sysinit_set and _bsd__stop_set_sysinit_set.
Is this the only type of new section magic? What about the old sysctl_set?
I added this to my linkcmds.
[listing]
----
/* sysinit section? */
. = ALIGN (16);
_bsd__start_set_sysinit_set = .;
*(set_sys_init_*);
_bsd__stop_set_sysinit_set = .;
----
* Convert all BSP linkcmds to use a linkcmds.base so the sections are
easier to insert.
* rtems-bsd-init-with-irq.c:
rtems_bsd_initialize_with_interrupt_server() has reference to
rtems_interrupt_server_initialize() and this method is unimplemented
- XXX BSP implements pieces
- BSPs using this software stack must support it apparently.
- What about Simple Vectored architectures?
* maxproc variable referenced by rtems-bsd-resource.c. What should it
be set to?
* ngroups_max variable referenced by rtems-bsd-prot.c. - What should
it be set to?
== FreeBSD Source
@ -80,6 +122,17 @@ pre-merged. The Makefile in this kit is automatically generated.
Any changes to sources in the freebsd or contrib directories will need to
be merged upstream into our master FreeBSD svn checkout.
The FreeBSD sources managed in RTEMS libbsd git repository (e.g. contrib
and freebsd directories) contain the "managed" version of the
FreeBSD source. The FreeBSD SVN source is the "master" version. The
freebsd-to-rtems.py script is used to transfer files between the two
trees. In general terms, if you have modified FreeBSD in the RTEMS libbsd
tree, you want to run the script in "revert" or "reverse" mode to move
the source back so you can run an "svn diff" against the upstream FreeBSD
source. If you want to transfer source from the FreeBSD SVN checkout to
the RTEMS libbsd tree, then you want to run the script in "forward" or
default mode.
=== Building RTEMS libbsd source
You need to configure RTEMS for the desired BSP and install it. The