Arnd Bergmann wrote: >On Thursday 05 January 2006 21:00, mcnernbm at notes.udayton.edu wrote: >> I finally noticed out_8 and in_8 and what not are located in the >> ppc io.h file in the kernel development download.? But when I >> tried to do a io.h with in my program I added #include <asm/io.h>? >> and it seems to find it with not problems but it can not find the >> functions with in that file.? Am i missing a define I need to set >> or something so I can see the right files with in io.h I am >> compiling for a ppc405 on a xilinx virtex 4 board. > >The definitions in that file are only usable from inside the kernel, >you can not use them in a user space application.
You may not include the file directly from a user-land application program, but you may copy/paste the in_*/out_* macros, with appropriate care off course. >The correct way to solve your problem (which you did not explain, so >I can only guess) would be to write a kernel device driver for >the peripherial you want to drive, at least if it does not exist yet. Sometimes, user-land access can make things simpler. YMMV. >For prototyping, you can play with mmap() on /dev/mem in a user >application, but that is often not very reliable. For sake of curiosity, what is not reliable in mmap'ed access by user application? Regards, -- Stephane
