linux.git/arch/mips/kernel/traps.c, branch v2.6.28

MIPS: Switch FPU emulator trap to BREAK instruction.

2008-10-30T14:44:34+00:00

Arguably using the address error handler has always been ugly.  But with
processors that handle unaligned loads and stores in hardware the
current mechanism ceases to work so switch it to a BREAK instruction and
allocate break code 514 to the FPU emulator.

Yoichi Yuasa provided a build fix for CONFIG_BUG=n.

Signed-off-by: Ralf Baechle 
Signed-off-by: Yoichi Yuasa

MIPS: Consider value of c0_ebase when computing value of exception base.

2008-10-30T14:44:33+00:00

It just so happens to be zero on all currently supported systems so this
hasn't bitten yet ...

[Ralf: Original patch from Cavium; handling of set_uncached_handler() and
de-ifdef'ed trap_init() implementation by me.]

Signed-off-by: Tomaso Paoletti 
Signed-off-by: David Daney 
Signed-off-by: Ralf Baechle

MIPS: Watch exception handling for HARDWARE_WATCHPOINTS.

2008-10-11T15:18:56+00:00

Here we hook up the watch exception handler so that it sends SIGTRAP when
the hardware watch registers are triggered.

Signed-off-by: David Daney 
Signed-off-by: Ralf Baechle

[MIPS] SMTC: Fix holes in SMTC and FPU affinity support.

2008-10-03T16:58:58+00:00

Signed-off-by: Kevin D. Kissell 
Signed-off-by: Ralf Baechle

[MIPS] Fix potential latency problem due to non-atomic cpu_wait.

2008-09-21T12:52:57+00:00

If an interrupt happened between checking of NEED_RESCHED and WAIT
instruction, adjust EPC to restart from checking of NEED_RESCHED.

Signed-off-by: Atsushi Nemoto 
Signed-off-by: Ralf Baechle

[MIPS] Fix WARNING: at kernel/smp.c:290

2008-09-05T20:24:11+00:00

trap_init issues flush_icache_range(), which uses ipi functions to
get icache flushing done on all cpus. But this is done before interrupts
are enabled and caused WARN_ON messages. This changeset introduces
a new local_flush_icache_range() and uses it before interrupts (and
additional CPUs) are enabled to avoid this problem.

Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Ralf Baechle

[MIPS] Fix data bus error recovery

2008-09-05T20:24:11+00:00

With -ffunction-section the entries in __dbe_table aren't no longer
sorted, so the lookup of exception addresses in do_be() failed for
some addresses. To avoid this we now sort __dbe_table.

Signed-off-by: Thomas Bogendoerfer 
Signed-off-by: Ralf Baechle

[MIPS] kgdb: add arch support for the kernel's kgdb core

2008-07-30T20:54:42+00:00

The new kgdb architecture specific handler registers and unregisters
dynamically for exceptions depending on when you configure a kgdb I/O
driver.

Aside from initializing the exceptions earlier in the boot process,
kgdb should have no impact on a device when it is compiled in so long
as an I/O module is not configured for use.

There have been quite a number of contributors during the existence of
this patch (see arch/mips/kernel/kgdb.c).  Most recently Jason
re-wrote the mips kgdb logic to use the die notification handlers.

Signed-off-by: Jason Wessel 
Signed-off-by: Ralf Baechle

[MIPS] Replace use of print_symbol with new %sP pointer format.

2008-07-15T17:44:33+00:00

Signed-off-by: Ralf Baechle

[MIPS] Remove board_watchpoint_handler

2008-07-15T17:44:29+00:00

It is not used anywhere in tree.

Signed-off-by: David Daney 
Signed-off-by: Andrew Morton 
Signed-off-by: Ralf Baechle