[ILUG] compile error

[Harry Moreau]

On  5 Jul, Oliver Ryan wrote:
> Hi,
> 
> I've a PCI card and am told that certain onboard registers are memory 
> mapped out into the PCI memory at a particular offset from the 
> PCI_BASE_ADDRESS_2 of the onboard device (the address in this case is 
> 0xfc020000).  To read/write to these 32bit registers then I use the snippet 
> below.  I compile with gcc altregread.c -D __KERNEL__ -o altregread.o but 
> then get lines and lines of parse errors in header files (see below).  The 
> KERNEL bit is for the io.h header file.
> 
> Ideas?  Thanks in advance.
> 
> #include<stdio.h>
> #include<stdlib.h>
> #include<asm/io.h> //contains readl/writel, etc.
> 
> int main(void)
> {
> int status, *base = ioremap(0xfc020000, 1024*1024);
> 
> status = readl(base + 0x40);
> 
> iounmap(base);
> 
> printf("%x", status);
> 
> return(0);
> 
> }
> 

Are you writing a kernel module?  Device driver? Or actually doing kernel hacking?
If you are then there's a ton of stuff you have to #include that you're not.

Have a look on google or similar for docs on kernel hacking, module and device driver writing.
 
You can't just write user programs that use kernel functions or read/write memory addresses
This ain't DOS, CP/M or MacOS.

-- 
--Harry Moreau----------------