Hi everybody,
I'm working on enabling PPS support in RTEMS (actually it is already running
and I'm preparing the commits to send them) but have couple of questions about
functions/macros that are defined in rtems-libbsd repository. Since the
repository where the changes need to be applied is just the rtems repo, I'm
wondering what is the best way to add those dependencies.
Let me mention which functions/macros I'm talking, where they can be found and
then I'll comment what I did.
The functions are:
int tvtohz(struct timeval *tv); found in
rtemsbsd/rtems/rtems-kernel-timesupport.c
void wakeup(void *chan); found in freebsd/sys/sys/systm.h
long lmax(long a, long b); found in freebsd/sys/sys/libkern.h
quad_t qmin(quad_t a, quad_t b); found in
freebsd/sys/sys/libkern.h
Some macros that define new functions based on _sleep():
msleep()
msleep_spin()
tsleep()
These macros can be found in freebsd/sys/sys/systm.h
And another macro:
ENOIOCTL; found in rtemsbsd/include/machine/rtems-bsd-kernel-space.h
Some easy solution is to copy the definition in the file where is needed. This
was done for lmax(), qmin() and ENOIOCTL.
In case of tvtohz() and wakeup() can be used a pointer to function. For doing
the same with msleep(), msleep_spin() and tsleep(), they need to be defined as
a function first; or a maybe a pointer to _sleep() can be used and then the
definition of the macros copied (I did the first).
The next question is when/where to set these pointers. I thought that a good
place where this can happen is while rtems_bsd_initialize() is called. For
doing this a kernel module and some macros in rtems-bsd-config.h need to be
added.
Please let me know if there is a better way to do these things.
Thanks in advance.
Gabriel
--------------------------
Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR)
Institute for Software Technology | SC-SRV-OSS | Lilienthalplatz 7 | 38108
Braunschweig | Germany
Gabriel Moyano | Research Scientist in Onboard Software Systems group
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