linux-toradex.git/arch/sh/kernel/cpu/sh3/entry.S, branch v3.4.1

sh: Remove superfluous setup_frame_reg call

2010-02-08T01:47:11+00:00

There's no need to setup the frame pointer again in
call_handle_tlbmiss. The frame pointer will already have been setup in
handle_interrupt.

Signed-off-by: Matt Fleming 
Signed-off-by: Paul Mundt

sh: Setup frame pointer in handle_exception path

2010-02-08T01:46:53+00:00

In order to allow the DWARF unwinder to unwind through exceptions we
need to setup the frame pointer register (r14).

Signed-off-by: Matt Fleming 
Signed-off-by: Paul Mundt

sh: Disable SCIF2 on the SH-X3 proto CPU.

2009-10-18T06:13:28+00:00

SCIF2 and the FPU exceptions happen to share vector numbers, one in
EXPEVT and the other in INTEVT. This is a violation of the interface and
should have never made it in to silicon. On top of that, the demux hack
that was added for special dispatch is rather error prone, and introduces
more problems than it solves. Kill all of it off, and just refuse to deal
with SCIF2 outright.

Signed-off-by: Paul Mundt

sh: Don't enable interrupts in the page fault path

2009-09-28T06:11:45+00:00

There's already code in do_page_fault() to conditionally enable
interrupts, so we don't need to unconditonally enable them before
calling it. This fixes a lockdep warning where we called
trace_hardirqs_off() but with irqs still enabled.

Signed-off-by: Matt Fleming 
Signed-off-by: Paul Mundt

sh: Kill off kgdb's magical NMI debouncing.

2009-09-01T08:45:35+00:00

The kgdb stub has traditionally tied in to the NMI slot, and manually
handled debounce. Now that we have a generic way to do this instead, all
of the stub-specific debounce silliness can be killed off.

Signed-off-by: Paul Mundt

sh: nmi_debug support.

2009-09-01T08:38:32+00:00

This implements support for NMI debugging that was shamelessly copied
from the avr32 port. A bit of special magic is needed in the interrupt
exception path given that the NMI exception handler is stubbed in to the
regular exception handling table despite being reported in INTEVT. So we
mangle the lookup and kick off an EXPEVT-style exception dispatch from
the INTEVT path for exceptions that do_IRQ() has no chance of handling.
As a result, we also drop the evt2irq() conversion from the do_IRQ() path
and just do it in assembly.

Signed-off-by: Paul Mundt

Merge branch 'master' into sh/smp

2009-09-01T04:54:14+00:00

Conflicts:
	arch/sh/mm/cache-sh4.c

sh: Remove implicit sign extension from assembler immediates

2009-08-24T08:09:53+00:00

The SH instruction set has several instructions which accept an 8 bit
immediate operand. For logical instructions this operand is zero extended,
for arithmetic instructions the operand is sign extended. After adding an
option to the assembler to check this, it was found that several pieces
of assembly code were assuming this behaviour, and in one case
getting it wrong.

So this patch explicitly sign extends any immediate operands, which makes
it obvious what is happening, and fixes the one case which got it wrong.

Signed-off-by: Stuart Menefy 
Signed-off-by: Paul Mundt

Merge branch 'sh/dwarf-unwinder'

2009-08-21T20:37:14+00:00

Conflicts:
	arch/sh/kernel/cpu/sh3/entry.S

sh: Setup the frame pointer in handle_interrupt

2009-08-21T12:04:10+00:00

When CONFIG_DWARF_UNWINDER is enabled setup r14 in handle_interrupt, so
that we can figure out what function was running when we were
interrupted.

Signed-off-by: Matt Fleming