We are going to split <linux/sched/debug.h> out of <linux/sched.h>, which
will have to be picked up from other headers and a couple of .c files.
Create a trivial placeholder <linux/sched/debug.h> file that just
maps to <linux/sched.h> to make this patch obviously correct and
bisectable.
Include the new header in the files that are going to need it.
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Mac interrupt code has been debugged. The Penguin deficiencies that
still cause unhandled interrupts aren't fixable here. Besides,
interrupts are fast and frequent and these printk statements
were never really useful IMO. Remove them.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
In macints.c there is some startup code which disables the SONIC interrupt
in an attempt to avoid an unhandled slot interrupt, which would be fatal.
This only works on those machines where the SONIC device is on-board.
When the mac_sonic driver is built-in, there's little point in doing this,
because the device will be initialized a few seconds later anyway. But
when mac_sonic is a module, the window for an unhandled interrupt is
longer.
Either way, we've already run the gauntlet for 5 or 10 seconds by the time
we get around to disabling this particular device. It's only by sheer luck
that we got this far.
Really, this is too little too late. The general problem of unhandled
early interrupts also affects other devices on other models. There are
better ways to resolve this problem.
1) When using the Penguin bootloader, boot Mac OS with extensions disabled
(by holding down the shift key at startup or by use of the Extensions
Manager control panel). The Penguin docs already contain this advice,
as it is always effective.
2) Have the Penguin bootloader disable the device. It already attempts
to disable slot interrupts. But since some hardware cannot mask slot
interrupts, Penguin should probably close the relevant device
drivers.
3) Use Emile instead of Penguin. AFAIK the boot ROM never enables network
device interrupts and hence they don't need to be disabled.
Remove this hack. It requires maintenance and it doesn't solve the
problem. It improves the odds for a few models, but so does setting
CONFIG_MAC_SONIC=y.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
mac_nmi_handler() is useless in its present form and locks up my PowerBook
180. Let's throw out the dead code and make it do something useful: print
a register dump and a stack trace.
mac_debug_handler() is also dead code. Remove it along with its static
data.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
The presence of the Apple Peripheral System Controller (PSC) can be
tested for by just checking its base address pointer.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
The IOP driver calls into the OSS driver to enable its IRQ. This undesirable coupling between drivers only exists because the OSS driver doesn't correctly handle all of its machspec IRQs.
Fix OSS handling of enable/disable for VIA1 IRQs (8 thru 15) which includes MAC_IRQ_ADB.
Back when I implemented pmac_zilog support I redefined IRQ_MAC_SCC incorrectly. Change this to a machspec IRQ so that it works on OSS.
Clean up the unused OSS audio IRQ and OSS_IRQLEV_* cruft that only confuses things.
Fix the OSS description in macints.c and remove an obsolete comment.
Don't enable the VIA1 irq before registering the handler.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Improve NuBus slot interrupt handling code and documentation. This patch fixes the NuBus NIC (mac8390) in my Quadra 700.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Enable via_alt_mapping on the Performa 588 and tidy up related documentation.
I'm betting that remapped IRQs work just fine on the Performa 580 series since it works on the LC 630 and the logic board part numbers are reputedly the same.
And the consensus seems to be that the Mac TV is essentially a Performa 550, not dissimilar to the Performa 520, so set the via_type accordingly.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Move some forward declarations into header files and adjust includes.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
mac_irq_pending() has only one caller (mac_esp.c). Nothing tests for Baboon, PSC or OSS pending interrupts. Until that need arises, let's keep it simple and remove all the unused abstraction. Replace it with a routine to check for SCSI DRQ.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
mac_clear_irq() is dead code and has been dead for as long as I can recall. On certain Mac models, certain irqs can't be cleared this way. Outside of irq dispatch, this code appears be unusable without busy loops or worse, and for irq dispatch we duplicate the same logic. Remove mac_clear_irq() and supporting code.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
This is a wrapper around m68k_setup_irq_chip() that discards its dummy
second parameter, to ease the future transition to genirq.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Make it more similar to the genirq version:
- Remove lock (unused as we don't do SMP anyway),
- Prepend methods with irq_,
- Make irq_startup() return unsigned int.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Add missing return statement. The docs say that the level 4 PSC IRQs
relate to MACE DMA and SCC. Since those drivers don't call
mac_irq_pending() this patch has no affect. But it should be fixed all the
same, since it can be useful for MACE debugging.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Remove the old 68k Mac serial port code and a lot of related cruft. Add
new SCC platform devices to mac 68k platform.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
- Replace external declarations by proper includes where availiable.
The accesses to some symbols had to be modified, as before they were
declared using e.g. "extern int _end", while asm-generic/sections.h uses
e.g. "extern char _end[]"
- Remove unused or superfluous external declarations
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
No-one seems to know how to mask individual baboon interrupts, so we just
mask the umbrella IRQ. This will work as long as only the IDE driver uses
the baboon chip (it can't deadlock). Use mac_enable_irq/mac_disable_irq
rather than enable_irq/disable_irq because the latter routines count the
depth of nested calls which triggers a warning and call trace because
IRQ_NUBUS_C is enabled twice in a row (once when the baboon handler is
registered, and once when the IDE IRQ is registered).
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Remove some more cruft from machw.h and drop the #include where it isn't
needed.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
m68k_handle_int() split in two functions: __m68k_handle_int() takes
pt_regs * and does set_irq_regs(); m68k_handle_int() doesn't get pt_regs
*.
Places where we used to call m68k_handle_int() recursively with the same
pt_regs have simply lost the second argument, the rest is switched to
__m68k_handle_int().
The rest of patch is just dropping pt_regs * where needed.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Introduce irq controller and use it to manage auto vector interrupts.
Introduce setup_irq() which can be used for irq setup.
Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Some fixes and cleanups from the linux-mac68k repo. Fix mac_esp by clearing
the VIA2 SCSI IRQ flag before the SCSI IRQ handler is invoked. Also fix a
race condition caused by unmasking a nubus slot IRQ then setting the relevant
nubus_active bit.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
