On 02/22/2017 09:40 PM, Jakub Jermář wrote: >> Confusions i am having: >> 1> The bootargs info are given in r2 register. How do i preserve it when >> stage-2 boot-loader comes into action , because till the kernel comes >> into picture i will loose the info passed from uboot. >> -------> i feel i need to preserve the info passed from Uboot so that i >> can pass it down to the kernel and initialize boot_args via NetBSD >> stage-2 loader . > > Yes, the best way to communicate information between the loader and the > kernel is via the bootinfo structure. Just feel free to add a member > which will hold the address from r2. Note that this structure needs to > be modified in two places: in the loader and also in the kernel. We > should probably fix this dichotomy by moving it under abi/.
One more thing - the arguments can theoretically overlap with memory used by the kernel, so it may be a good idea to actually pass them as a copy rather than by reference to the kernel. Jakub _______________________________________________ HelenOS-devel mailing list [email protected] http://lists.modry.cz/listinfo/helenos-devel
