Hi All, I am working on IBM 440GP based proprietry board using MVL 2.1 linux. I have a device siiting on the EBC at 0x100100000 and I want to access it from the user space. I use mmap call of my driver to do that. I have not initialized the device. I have set the access parameters and controller registers of EBC appropriately to access the device.
But when I make ioremap() call using, ioremap64(0x100100000, 0x2000), the function returns a valid pointer. But when I do a sample write and read, I am not getting correct values. While I was debigging, I couldn't find the TLB entry for the real address. When I try to access the returned mmap() pointer, kernel says , do_wp_page: bogus page at address xxxx (page yyyy) VM: killing process xxx Does anyone know what could be the reason? 1. Do I have to initialize the device in setup_arch function ? 2. Do I have to explicitly create a TLB entry for the device ? Hoping to get a response. I am stuck in the middle. Thanks and regards, Vishwa ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
