linux-toradex.git/arch/xtensa/include/asm/traps.h, branch v4.4.73

xtensa: fix kernel register spilling

2015-08-17T04:33:35+00:00

call12 can't be safely used as the first call in the inline function,
because the compiler does not extend the stack frame of the bounding
function accordingly, which may result in corruption of local variables.

If a call needs to be done, do call8 first followed by call12.

For pure assembly code in _switch_to increase stack frame size of the
bounding function.

Cc: stable@vger.kernel.org
Signed-off-by: Max Filippov

xtensa: introduce spill_registers_kernel macro

2014-01-25T19:20:09+00:00

Most in-kernel users want registers spilled on the kernel stack and
don't require PS.EXCM to be set. That means that they don't need fixup
routine and could reuse regular window overflow mechanism for that,
which makes spill routine very simple.

Cc: stable@vger.kernel.org
Suggested-by: Chris Zankel 
Signed-off-by: Max Filippov

xtensa: add SMP support

2014-01-14T18:19:58+00:00

This is largely based on SMP code from the xtensa-2.6.29-smp tree by
Piet Delaney, Marc Gauthier, Joe Taylor, Christian Zankel (and possibly
other Tensilica folks).

Signed-off-by: Max Filippov 
Signed-off-by: Chris Zankel

xtensa: clean up stpill_registers

2013-05-09T08:07:10+00:00

- remove unused asm parameters;
- fix EXCM bit setting in the PS SR during _spill_registers call.

Signed-off-by: Max Filippov 
Signed-off-by: Chris Zankel

xtensa: move spill_registers to traps.h

2013-02-24T03:22:48+00:00

Signed-off-by: Max Filippov 
Signed-off-by: Chris Zankel

xtensa: add trap_set_handler function

2012-12-19T05:10:22+00:00

trap_set_handler sets new C-handler in the exception table and returns
previous handler.

Signed-off-by: Max Filippov 
Signed-off-by: Chris Zankel