continue documentation efforts.

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+I need to figure out how to write MarkDown files, but the general procedure of a
+boot is that we
+
+1) Assume we start of in real memory mode, i.e. no MMU active.
+
+2) arch/whatever/init/init.c kickstarts us into virtual memory with a direct
+mapping, with offset VM_DMAP aliasing to physical address 0.
+
+3) The kernel proper is moved to its correct location in this direct mapping.
+
+4) The kernel proper is jumped to, after which the kernel does whatever.