Hi!

I am really new to this kind of developement, and i am in trouble with this system. I have an altera ORSoC developement board. I have downloaded the Virtualbox image i have found on the ORSoC page, and i sucseeded in uploading the SoC and the LINUX on it. It is working like it should.
My problem is that i want to write some program that i can run on it, and i dont know how to compile them.
Do i need a newer toolchain for it, or i can do it with the one in the vbox image?
What switches i have to use for compiling?
Please help me i am really newbie here.
Maybe write me some example, what do i have to write in the terminal.

Thank You
Regards
Szabolcs

Now actually i succeeded to compile a simple c file and it runs, but when i try to compile some more complicated, it gives the error:
fatal error: linux/module.h: No such file or directory

What do i have to change, so that it finds the headers?

Thank You

What are you trying to build? Which toolchain are you using? Normally you will need a *-linux-uclibc toolchain to compile a linux userspace application.

Hi!

I use 4.5.1-or32-1.0rc4 version of the gcc for compiling. I want to create a little program with which i can manipulate a physical register. I know the address of that register. I know that this is not so simple because there is user space and kernel space and things like that, but the only example program i found is this:
http://www.freesoftwaremagazine.com/articles/drivers_linux

and this uses includes that i cant, because if i try to include them, the gcc tells me that they are missing. I tried to copy theese files from elsewhere to the root where the gcc seeks, but than other error message came:
error: expected �=�, �,�, �;�, �asm� or �__attribute__� before �parse_early_param�

but theese headers are probably good so i dont know what to do now or how to start.

So my main purpos is to read and write a register wich is on the system bus. And i need to know how can i do it, what headers i have to include and what functions i have to use?

Thank you

Ok. So then, for start, just make a kernel module as your article suggests. I assume that you've already compiled a linux kernel for openrisc. Then what you need to do is to add your module to your kernel source tree (add your module .c file and modify appropriate Makefile) - nothing specific to openrisc here, you will find all needed information in instructions for linux on other platforms.

You can work with registers using normal C pointers. Something like this: (*volatile unsigned int)0x90000004 = 0x42; But you should NOT do this.
Instead use ioread32(iowrite32) and ioread32be(iowrite32be) functions (look at drivers/net/ethernet/ethoc.c for sample).

So basically my idea is that, if you can compile your kernel, then just let kernel Makefiles handle includes for your kernel module.