The confstr was shared between readers so seprintconf() could
write concurrently to that buffer which is not safe.
This replaces the shared static confstr[Maxconf] buffer with a
pointer that is initially nil and a buffer that is alloced on
demand.
The new confstr pointer (and buffer) is now only updated while
wlock()ed from the new setconfstr() function.
This is now done by mconfig() / mdelctl() just before releasing
the wlock.
Now, rdconf() will check if confstr has been initialized, and
test for it again while wlock()ed; making sure the configuration
is read only once.
Also, rdconf() used to check for a undocumented "fsdev:\n" string
at the beginning of config data tho that was never documented.
This changes mconfig() to ignore that particular signature so
the example from the manpage will work as documented.
let pci.c deal with the special cardbus controller bar0 and
expansion roms.
handle apic interrupt routing for devices behind a cardbus slot.
do not free the pcidev on card removal, as the drivers
most certanly are not prepared to handle this yet.
instead, we provide a pcidevfree() function that just unlinks
the device from pcilist and the parent bridge.
p.kosyh writes:
Hello! I finally bought rpi4 4Gb specially for 9front. It seems,
that default bpp of framebuffer is 16. I changed it to 24 (via
cmdline.txt and config.txt) and found, that rendering is much faster!
(May be due removing overheads in 16->24 conversions?)
But on rpi4 r and b channels are swapped. So, i changed BGR24 to
RGB24 in bcm/screen.c and now it works fine!
On the pi400, the xhci reset firmware mailbox request
assumes that the pci windows match the ones specified
in the device tree. The inbound window (pcidmawin)
also varies now depending on the amount of memory
installed.
It is all pretty ridiculous, as the firmware could as
well just read the pci controllers hardware register
to determine the window configuration and the os could
keep a nice simple 1:1 mapping (with pci dma addresses
== physical addresses).
This adds the new function pointer PCArch.clockinit(),
which is a timer dependent initialization routine.
It also takes over the job of guesscpuhz(). This way, the
architecture ident code can switch between different
timers (i8253, HPET and XEN timer).
Revert the change, as it causes system lockups on bootup
on some systems with USB OHCI controllers, suspected to be
caused by BIOS/SMM accessing the device as BIOS handover
has not been executed yet.
We might bring that back when the problem has is better
understood.
Tilting allows using left/right rotated or invetrted display orientation.
This can be changed at runtime such as: echo tilt right > /dev/vgactl
This removes the old panning and vga overlays as they are only implemented
with some ancient vga controllers.
Previously, mmurelease() was always called with
palloc spinlock held.
This is unneccesary for some mmurelease()
implementations as they wont release pages
to the palloc pool.
This change removes pagechainhead() and
pagechaindone() and replaces them with just
freepages() call, which aquires the palloc
lock internally as needed.
freepages() avoids holding the palloc lock
while walking the linked list of pages,
avoding some lock contention.
we might as well handle the per process cycle
counter in the portable part instead of duplicating the code
in every arch and have inconsistent implementations.
we now have a portable kenter() and kexit() function,
that is ment to be used in trap/syscall from user,
which updates the counters.
some kernels missed initializing Mach.cyclefreq.
the tulip driver is used in microsofts hypver-v
as the legacy ethernet adapter for pxe booting.
to make the driver work on pc64, we need to
store the Block* pointers in a separate array
instead of stuffing them into buffer address 2
of the hardware descriptor.
also, enable the driver in the pc64 kernel.
The OCEXEC flag used to be maintained per channel,
making it shared between all the file desciptors.
This has a unexpected side effects with regard to
channel passing drivers such as devdup (/fd),
devsrv (/srv) and devshr (/shr).
For example, opening a /srv file with OCEXEC
makes it impossible to be remounted by exportfs
as it internally does a exec() to mount and
re-export it. There is no way to reset the flag.
This change makes the OCEXEC flag per file descriptor,
so a open with the OCEXEC flag only affects the fd
group of the calling process, and not the channel
itself.
On rfork(RFFDG), the per file descriptor flags get
copied.
On dup(), the per file descriptor flags are reset.
The second modification is that /fd, /srv and /shr
should reject the ORCLOSE flag, as the files that
are returned have already been opend.
enable pci busmaster before set the fis-receive-enable
bit in the port command register.
not doing so triggers a crash in qemu like:
address_space_unmap: Assertion `mr != NULL' failed.
as qemu tries to process the dma command list as soon
as we set that flag and busmaster dma needs to be enabled
at this point.
Bhyve returns 0 in MTRRCap register, so we
can use that instead on relying on cpuid only
to see if MTRR's are supported.
That way we can get rid of the sanity check
in memory.c.
On AMD64, CR0/CR4 are 64-bit registers, with
the upper half reserved. So use uintptr type
to store the register values to get 32 bit on 386
and 64 bit on AMD64.
