We're working on a project that requires a two megabytes block of contiguous memory in kernel space. Although it is well documented that memory can be reserved by using mem=xx arguments during boot time, it is unclear (to me) as to how a driver can automatically detect the size of the said reserved block.
At this moment I am 'cheating' by inserting a global variable to save a copy of total_memory before it gets replaced by __max_memory in arch/ppc/mm/init.c so that the saved total_memory (containing the real physical memory size passed in from boot block) is available to my driver. But I can't help but to feel there has to be a better way to determine the reserved buffer size. Is there something else that will do this without having to modify the kernel? Any comment is appreciated. ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
