When u mmap a memory of a device u are mapping the memory of the device to the RAM. So what ever you write or read from that memory it is equivalent to writing and reading from the device memory. raghu On Sat, 11 Jan 2003, Anticipating a Reply wrote: > Hi All , > > I was going through the Kernel Hackers Guide , > I came across the topic "User Space Driver" . > > Link is below :- > http://hp.uci.agh.edu.pl/doc/khg/section2.3.2.html > > Here they say that you can use /dev/mem to > mmap(), a section of memory and use inb() & > outb() to access memory . > > But as per the man pages "man mem" , they > say that /dev/mem represents the physical > address mapping of main memory , that is RAM . > > How do I access a memory space of a device > memory ,for eg: Memory on a PCI card ? > > Have I misunderstood the man pages of > /dev/mem ? > > Kindly help me out of this . > > Thanks in advance . > > Best Regards ! > > > ________________________________________________________________________ > Missed your favourite TV serial last night? Try the new, Yahoo! TV. > visit http://in.tv.yahoo.com > -- > Kernelnewbies: Help each other learn about the Linux kernel. > Archive: http://mail.nl.linux.org/kernelnewbies/ > FAQ: http://kernelnewbies.org/faq/ > -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
