On Tue, 10 Jul 2007, ik wrote:
> On 7/9/07, Alain Michaud <[EMAIL PROTECTED]> wrote: > > Hi, > > > > last year I have written a very small driver using the "char" model, > > ie. that is put in src/linux/drivers/char something very simple to > > read/write a few bytes on an output port. I would have been glad to > > write it in pascal, but I do not think it would be possible at all. I > > finally did it this way: > > > > -- The "kernel" part is written in C/asm but the code is as simple as > > possible > > > > -- The "user" part is written in FPC > > > > -- The interface to the kernel is done using a few functions thru > > IOCTL interface. > > > > Now, why not doing the kernel part in FPC? > > > > Well, The .h files that you need to translate to the interface > > section of your unit are very long and difficult to understand. Plus > > they contain some macro definitions which are platform specfic. > > > > For example if you use the ASM instruction "outb" to write one byte > > on a port in your driver source code you would use "_outb" which in > > fact is a macro specially tuned for your platform !! The same is true > > for most procedure or instructions that you use when when programming in > > kernel space. Even a simple "move" instruction has to be "spinlocked" > > > > In conclusion, I gave up ! It is so simple to adapt an example from a > > C textbook and although I do not know any C at all I could write to my > > I/O port whitin a fey days. > > > > Good luck > > > > Alain > > > > > > > > > > > > > > > > > > On Fri, 2007-07-06 at 23:05 +0300, ik wrote: > > > Hi, > > > > > > I have found the following guide: > > > http://www.linuxdevcenter.com/pub/a/linux/2007/07/05/devhelloworld-a-simple-introduction-to-device-drivers-under-linux.html > > > > > > And I was thinking in implementing it using FPC. > > > My question is, how hard can it be ? > > > Are there any kernel modules that already been binded into FPC ? such > > > as th ones that will give me printk ? > > > > > > Are there any known examples of someone that already made a Linux > > > kernel module using FPC ? > > > > > > Thanks, > > > Ido > > > > The more I read about it, the more I believe that I need more time to > implement my freePOS FPC based kernel rather then to use Linux one... > The problem is that I do not have time, and only papers for memory > management system that I wish to implement as the first part... Try the delphineos kernel. it's written using FPC. http://sourceforge.net/projects/delphine Michael. _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
