xtensa: don't attempt to use unconfigured timers

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
xtensa WIP: add Three Core HiFi-2 MX Variant.

Signed-off-by: Pete Delaney <piet@tensilica.com>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
xtensa: don't use a7 in simcalls

To support FRAME_POINTER avoid using a7 in __simc (none of the existing
simcalls needs it). Replace calls to __simc with more specific
simc_read, simc_write and simc_lseek calls.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
xtensa: WIP: lockdep support

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
xtensa: run hardirqs with hardirqs off

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
xtensa: ISS: fix timer_lock usage in rs_open

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
xtensa: WIP: add SMP support

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>