When running as a PVH guest, there's no emulated i8254, so we need to
use the Xen PV timer as the early source for DELAY. This change allows
for different implementations of the early DELAY function and
implements a Xen variant for it.
Approved by: gibbs
Sponsored by: Citrix Systems R&D
dev/xen/timer/timer.c:
dev/xen/timer/timer.h:
- Implement Xen early delay functions using the PV timer and declare
them.
x86/include/init.h:
- Add hooks for early clock source initialization and early delay
functions.
i386/i386/machdep.c:
pc98/pc98/machdep.c:
amd64/amd64/machdep.c:
- Set early delay hooks to use the i8254 on bare metal.
- Use clock_init (that will in turn make use of init_ops) to
initialize the early clock source.
amd64/include/clock.h:
i386/include/clock.h:
- Declare i8254_delay and clock_init.
i386/xen/clock.c:
- Rename DELAY to i8254_delay.
x86/isa/clock.c:
- Introduce clock_init that will take care of initializing the early
clock by making use of the init_ops hooks.
- Move non ISA related delay functions to the newly introduced delay
file.
x86/x86/delay.c:
- Add moved delay related functions.
- Implement generic DELAY function that will use the init_ops hooks.
x86/xen/pv.c:
- Set PVH hooks for the early delay related functions in init_ops.
conf/files.amd64:
conf/files.i386:
conf/files.pc98:
- Add delay.c to the kernel build.
This should not introduce any functional change, and makes the
functions suitable to be called before we have actually mapped the
vcpu_info struct on a per-cpu basis.
Approved by: gibbs
Sponsored by: Citrix Systems R&D
dev/xen/timer/timer.c:
- Remove citrical_{enter/exit}, the clock code will already be called
with preemption disabled when needed. Add a comment to that regard
in xentimer_get_timecount.
- Allow xen_fetch_vcpu_time to be called with a specifc vcpu_info
that will be used to fetch current time.
- Assert that xentimer_et_start will always be called with preemption
disabled.
Add hooks to amd64 in order to have diverging implementations, since
on Xen PV the metadata is passed to the kernel in a different form.
Approbed by: gibbs
Sponsored by: Citrix Systems R&D
amd64/amd64/machdep.c:
- Define init_ops for native.
- Put native code inside of native_parse_preload_data hook.
- Call the parse_preload_data in order to fill the metadata info.
x86/include/init.h:
- Declare the init_ops struct.
x86/xen/pv.c:
- Declare xen_init_ops that contains the Xen PV implementation of
init_ops.
- Implement the parse_preload_data for Xen PVH, the info is fetched
from HYPERVISOR_start_info->cmd_line as provided by Xen.
This adds and enables the PV console used on XEN kernels to
GENERIC/XENHVM kernels in order for it to be used on PVH.
Approved by: gibbs
Sponsored by: Citrix Systems R&D
dev/xen/console/console.c:
- Define console_page.
- Move xc_printf debug function from i386 XEN code to generic console
code.
- Rework xc_printf.
- Use xen_initial_domain instead of open-coded checks for Dom0.
- Gate the attach of the PV console to PV(H) guests.
dev/xen/console/xencons_ring.c:
- Allow the PV Xen console to output earlier by directly signaling
the event channel in start_info if the event channel is not yet
initialized.
- Use HYPERVISOR_start_info instead of xen_start_info.
i386/include/xen/xen-os.h:
- Remove prototype for xc_printf since it's now declared in global
xen-os.h
i386/xen/xen_machdep.c:
- Remove previous version of xc_printf.
- Remove definition of console_page (now it's defined in the console
itself).
- Fix some printf formatting errors.
x86/xen/pv.c:
- Add some early boot debug messages using xc_printf.
- Set console_page based on the value passed in start_info.
xen/xen-os.h:
- Declare console_page and add prototype for xc_printf.
Add the PV/PVH entry point and the low level functions for PVH
early initialization.
Approved by: gibbs
Sponsored by: Citrix Systems R&D
amd64/amd64/genassym.c:
- Add __FreeBSD_version define to assym.s so it can be used for the
Xen notes.
amd64/amd64/locore.S:
- Make bootstack global so it can be used from Xen kernel entry
point.
amd64/amd64/xen-locore.S:
- Add Xen notes to the kernel.
- Add the Xen PV entry point, that is going to call hammer_time_xen.
amd64/include/asmacros.h:
- Add ELFNOTE macros.
i386/xen/xen_machdep.c:
- Define HYPERVISOR_start_info for the XEN i386 PV port, which is
going to be used in some shared code between PV and PVH.
x86/xen/hvm.c:
- Define HYPERVISOR_start_info for the PVH port.
x86/xen/pv.c:
- Introduce hammer_time_xen which is going to perform early setup for
Xen PVH:
- Setup shared Xen variables start_info, shared_info and
xen_store.
- Set guest type.
- Create initial page tables as FreeBSD expects to find them.
- Call into native init function (hammer_time).
xen/xen-os.h:
- Declare HYPERVISOR_start_info.
conf/files.amd64:
- Add amd64/amd64/locore.S and x86/xen/pv.c to the list of files.
Move asm IPIs handlers to C code, so both Xen and native IPI handlers
share the same code.
Reviewed by: jhb
Approved by: gibbs
Sponsored by: Citrix Systems R&D
amd64/amd64/apic_vector.S:
i386/i386/apic_vector.s:
- Remove asm coded IPI handlers and instead call the newly introduced
C variants.
amd64/amd64/mp_machdep.c:
i386/i386/mp_machdep.c:
- Add C coded clones to the asm IPI handlers (moved from
x86/xen/hvm.c).
i386/include/smp.h:
amd64/include/smp.h:
- Add prototypes for the C IPI handlers.
x86/xen/hvm.c:
- Move the C IPI handlers to mp_machdep and call those in the Xen IPI
handlers.
i386/xen/mp_machdep.c:
- Add dummy IPI handlers to the i386 Xen PV port (this port doesn't
support SMP).
baudrate of the device special file, and makes sure that on open(2) the
UART is programmed with the correct baudrate. This then eliminates the
need in uart_tty_param() to override the speed setting.
This will allow us to more easily test the software versions of these
routines...
Considering that we've never had an software asymetric implmentation,
it's doubtful anyone has this enabled...
swi_exit code in exception.S instead of having its own inline expansion
of the DO_AST and PULLFRAME macros. That means that now all references
to the PUSH/PULLFRAME and DO_AST macros are localized to exception.S,
so move the macros themselves into there and remove them from asmacros.h
and eliminate vectors.S. All low-level exception handling is now
consolidated into exception.S.
Along with moving the default FIQ handler, change it to disable FIQs
before returning. An FIQ should never happen, but if it does, it's got
to be disabled as part of ignoring it.
In general, we have hand-wavy support for FIQs that probably hasn't been
used for 10 years and probably doesn't work (almost certainly doesn't
work for SMP because it only updates the vector on the current cpu). This
change doesn't really make the overall situation any better or worse.
and the functionality it provided into arm/exception.S. Rename the main
irq handling routine from arm_handler_execute() to arm_irq_handler() to
make it more congruent with how other exception handlers are named, and
also update its signature to reflect what has long been reality: it is
passed just a trapframe pointer, no interrupt number argument.
private per-chip HAL.
This allows the ah_osdep.[ch] code to check whether the power state is
valid for doing chip programming.
It should be a no-op for normal driver work but it does require a
clean kernel/module rebuild, as the size of HAL structures have changed.
Now, this doesn't track whether the hardware is ACTUALLY awake,
as NETWORK_SLEEP wakes the chip up for a short period when traffic
is received. This doesn't actually set the power mode to AWAKE, so
we have to be careful about how we touch things.
But it's enough to start down the path of implementing station mode
chipset power savings, as a large part of the silliness is making
sure the chip is awake during periodic calibration / ANI and
random places where transmit may be occuring. I'd rather not a repeat
of debugging power save on ath9k, where races with calibration
and transmit path stuff took a couple years to shake out.
Tested:
* AR5416, STA mode
This fixes a pgrep test that assumed that PID 2 was named g_event. This
does not seem to be the case any longer (and I don't know if it ever was
in all possible setups).
Change this test to use the idle loop instead and determine its expected
PID using ps without assuming any specific ID.
First, change the driver to run the installed yacc instead of the one from
/usr/obj (which might not be there), just as we (intend to) do with all
other tests.
Second, regenerate the expected output files from scratch. Based on visual
inspection, the differences seem OK. But this highlights that the tests in
here are too fragile and, possibly, useless: we should be testing the
behavior of the generated program, not the literal output. Something to be
addressed later.
never actually ran on these chips (other than using SA1 support in an
emulator to do the early porting to FreeBSD long long ago). The clutter
and complexity of some of this code keeps getting in the way of other
maintenance, so it's time to go.
allows us to change the uart(4) driver to not hardcode specific line
settings for the serial console.
A terminal type of 3wire makes sure the console still works when no DCD
signal is present, which preserves behviour. When it is known that the
terminal server (or DCE in general) provides DCD, a terminal type/class
of std can be used. This has the effect of being logged out when one
disconnects from the console -- improving security overall.
Likewise, when uart(4) does not fixate the baudrate, one can change
the terminal type/class to set a specific baudrate. An operator can use
this to change the console speed mid-flight, without needing a reboot.
Of course it helps in this respect if and when the firmware can be
configured from the OS.
The above mentioned capabilities depend on uart(4) being changed, which
is to happen next.
the existing terminal types/classes that have the baudrate suffix,
but differ in that no baudrate is set/defined.
The purpose of these new types/classes is to allow them to be used
for the serial console. Currently the uart(4) driver fixates the
baudrate and the CLOCAL flag, which means that it doesn't matter
whether you give it std.<baud> or 3wire.<baud> as the terminal type
to getty and what exactly <baud> is set to. It's being overridden
by uart(4). The goal is to change uart(4) not to override these
settings.
to the actual handler routine. All the pointers are static-intialized to
the only handlers available, and yet various platform-specific inits still
set those pointers (to the values they're already initialized to). Begin
to drain the swamp by removing all the redundant external declarations and
runtime setting of the pointers that's scattered around various places.
The old code used static storage to preserve a couple registers while
setting up the trapframe for the main handler. Doing so was the last
leftover crumbs from the days when a low-level debugger was hooked into
the exception entry code.
Now the exception entry sequence is essentially the same as for the
other exceptions, which still involves needlessly indirecting through
a function pointer which points to the same code on every platform.
Removing that indirection will be handled as a separate cleanup.
This work is based on an analysis by Juergen Weiss.
enabled. In vfp_discard(), if the state in the VFP hardware belongs to
the thread which is dying, NULL out pcpu fpcurthread to indicate the
state currently in the hardware belongs to nobody.
Submitted by: Juergen Weiss
Pointy hat to: me
