bug: as jpm pointed out, when we run aux/wpa in rio window
and delete the window, aux/wpa was killed as it shared the
note group of the window.
fix: fork the notegroup.
x230 booted in efi only (no csp) mode hangs
when traditional i8042reset() keyboard reset
is tried.
so we try acpireset() first which discoveres
and writes the acpi reset register.
instead of including kernel and config in the efi
fat image, we can just include the loaders and
read the plan9.ini and kernel from iso filesystem
just like the bios loaders.
the uartmini enable function used to override the baud
register so the effecive baudrate was always set to
115200 baud.
now the default baudrate of 9600 is set correctly and can
be changed in the console= boot parameter.
thanks aap and hiro for debugging, pizza and beer :)
having the memconf() (*e820=) last clutters the screen.
do it first, so we can read *acpi= and *bootscreen=
prints.
we want to continue using tftp even when the /cfg/pxe/$ether
file is not found. only when we detect no pxe/dhcp session,
then we switch to local filesystem (non-network boot).
to make it possible to mark the bootscreen framebuffer
as write combining in early initialization, mtrr() is
changed not not to error() but to return an error string.
as bootscreen() is used before multiprocessor initialization,
we have to synchronize the mtrr's for every processor as
it comes online. for this, a new mtrrsync() function is
provided that is called from cpuidentify() if mtrr support
is indicated.
the boot processor runs mtrrsync() which snarfs the
registers. later, mtrrsync() is run again from the
application processors which apply the values from the
boot processor.
checkmtrr() from mp.c was removed as its task is also
done by mtrrsync() now.
rampage() cannot be used after meminit(), so test for
conf.mem[0].npage != 0 and use xalloc()/mallocalign()
instead. this allows us to use vmap() early before
mmuinit() which is needed for bootscreeninit() and
acpi.
to get memory for page tables, pc64 needs a lowraminit().
with EFI, the RSDT pointer is passed in *acpi= parameter
from the efi loader. as the RSDT is ususally at the end of
the physical address space (and not to be found in
bios areas), we cannot KMAP() it so we need to vmap().
