By banging on get_physical_address, I was able to confirm that qemu
will properly assert an exception if the VM's MMU believes the page is
read-only.
How does env-mmuregs[] get mapped to the VM's MMU? I would normally
write this off as an OpenBIOS bug, but it seems like bad behavior for
an
Old versions of SunOS don't understand the Sun4m with OBP machine
type of 0x80. They expect the machine type of actual Sun machines,
e.g., 0x71 or 0x72. This patch adds a machine type to the Sparc
target and renames the old machine to clarify that it's emulating an
OBP platform rather than
