When running with narrow firmware (64-bit kernel using a 32-bit
firmware), extend PDC addresses into the 0xfffffff0.00000000
region instead of the 0xf0f0f0f0.00000000 region.

This fixes the power button on the C3700 machine in qemu (64-bit CPU
with 32-bit firmware), and my assumption is that the previous code was
really never used (because most 64-bit machines have a 64-bit firmware),
or it just worked on very old machines because they may only decode
40-bit of virtual addresses.

Cc: stable@vger.kernel.org
Signed-off-by: Helge Deller <deller@gmx.de>

PDC uses the PDC_MODEL_OS64 and PDC_MODEL_OS32 constants, so use
those constants for the internal WIDE_FIRMWARE/NARROW_FIRMWARE too.

Signed-off-by: Helge Deller <deller@gmx.de>

Instead of usig #ifdefs, simply return PDC_BAD_PROC for functions
which aren't available on 64-bit CPUs.

Signed-off-by: Helge Deller <deller@gmx.de>

Signed-off-by: Helge Deller <deller@gmx.de>

This fixes a sparse warning which suggest to make those static.

Signed-off-by: Helge Deller <deller@gmx.de>

Tell sparse about correct context for pdc_cpu_rendezvous_*lock()
functions.

Signed-off-by: Helge Deller <deller@gmx.de>

Signed-off-by: Helge Deller <deller@gmx.de>

Some 64-bit machines require us to call the STI ROM in 64-bit mode, e.g.
with the VisFXe graphic card.
This patch allows drivers to use such 64-bit calling conventions.

Tested-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>

The panic notifiers' callbacks execute in an atomic context, with
interrupts/preemption disabled, and all CPUs not running the panic
function are off, so it's very dangerous to wait on a regular
spinlock, there's a risk of deadlock.

Refactor the panic notifier of parisc/power driver to make use
of spin_trylock - for that, we've added a second version of the
soft-power function. Also, some comments were reorganized and
trailing white spaces, useless header inclusion and blank lines
were removed.

Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Jeroen Roovers <jer@xs4all.nl>
Acked-by: Helge Deller <deller@gmx.de> # parisc
Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com>
Signed-off-by: Helge Deller <deller@gmx.de>

There is an off-by-one if the printed string includes a new-line
char.

Cc: stable@vger.kernel.org
Signed-off-by: Helge Deller <deller@gmx.de>