Re: Help with some low level access
Geert Uytterhoeven wrote:
ISA I/O space is the low part of PCI I/O space.
ISA memory space is something different (not available on Macs).
I should mention I am not using a Mac, it is an "AmigaOne/MAI Teron"
board, which is basically an ATX board with a VIA Southbridge (hence the
ISA peripherals), and a PPC Specific Northbridge which provides PC like
functions (AGP, PCI...).
The above code (not using ioperm) works if I put it into the kernel, e.g
in the dma.c driver, but I wanted to use it from user space when I need
it (which is why I have ioperm), not to put it in the kernel. There does
not seem to be any sys/io.h with the PowerPC libc, and no inb or ioperm
functions for user space programs (???), the above program won't build
Does my sio.c still build?
I tried to built it (after changing CHRP_ISA_IO_BASE), but for some
reason there is no "inb" or "outb" functions, i.e
sio.c: In function `sio_write':
sio.c:80: warning: implicit declaration of function `outb'
sio.c: In function `sio_read':
sio.c:87: warning: implicit declaration of function `inb'
and of course it fails to link. I compile with "gcc -g -Wall -O2", am I
doing something badly wrong here?