site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com On Aug 15, 2006, at 12:02 PM, darwin-dev-request@lists.apple.com wrote: I do not have any code for transfer yet. After adding set_Page = (UInt32*)IOMallocAligned(PAGE_SIZE,PAGE_SIZE) line, when I loaded the kext kernel crashed. I then tried IOMalloc as well as IOMallocPageable to check if they work. All of them result in kernel crash. Can anyone tell what I am doing wrong here? Not with so little information, no. I read in kernel programming on Mac (pdf document) that IOMallocAligned should not be used. But that document did not say anything about IOMallocPageable. You read a document that told you not to do something, so you went ahead and did it anyway? = Mike _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.appl... I am writing a PCI device driver to transfer data from the board memory to the system memory. I am trying to allocate a wired page to transfer data. Typically you don't want to do this; instead you would transfer directly to your client's memory. If you're reading documents, I encourage you to read the one that explains two-machine debugging. You're not going to get very far developing a device driver without some capacity for debugging your mistakes, and this mailing list is no substitute for the proper tools. I would also encourage you to explore the large amount of I/O Kit device driver source available on the web, and look for examples of the sort of things that your driver needs to do. If you're not willing or able to share your source code with us, there is little or no help that we can offer in return when confronted with questions like the one you've asked above. This email sent to site_archiver@lists.apple.com