harvey won't boot with initrd on real hardware about harvey

[gmacd]

So I've got some ideas about the page fault with initrd on real hardware:

• In umeminit, setphysmembounds is called to set the user memory area to start from the start of the last PamMODULE section.
• umeminit then calls physinit to initialise every physical memory section of type PamMEMORY that's larger than 2Mi.
• The problem is that in my real hardware example, there's a PamMEMORY section larger than 2Mi between the kernel and the initrd module. This is considered outside the physical memory bound (in setphysmembounds), but we still try to call physinit for it.

A quick fix would be to not call physinit for any memory section before the module sections (if there is one). In this case you'd lose 4Mi of available ram (the actual size is just under 6Mi).