linux-toradex.git/arch/arc/kernel/smp.c, branch v4.4.4

ARC: smp: Rename platform hook @init_cpu_smp -> @init_per_cpu

2015-12-17T07:26:56+00:00

Makes it similar to smp_ops which also has callback with same name

Signed-off-by: Vineet Gupta

ARC: rename smp operation init_irq_cpu() to init_per_cpu()

2015-12-17T07:26:43+00:00

This will better reflect its description i.e. "any needed setup..."
and not just do an "IPI request".

Signed-off-by: Noam Camus 
Acked-by: Vineet Gupta 
Signed-off-by: Vineet Gupta

ARC: smp: Introduce smp hook @init_irq_cpu called for all cores

2015-10-28T10:43:41+00:00

Note this is not part of platform owned static machine_desc,
but more of device owned plat_smp_ops (rather misnamed) which a IPI
provider or some such typically defines.

This will help us seperate out the IPI registration from platform
specific init_cpu_smp() into device specific init_irq_cpu()

Signed-off-by: Vineet Gupta

ARC: smp: Rename platform hook @init_smp -> @init_cpu_smp

2015-10-28T10:43:40+00:00

This conveys better that it is called for each cpu

Signed-off-by: Vineet Gupta

ARC: smp: Introduce smp hook @init_early_smp for Master core

2015-10-28T10:43:40+00:00

This adds a platform agnostic early SMP init hook which is called on
Master core before calling setup_processor()

  setup_arch()
     smp_init_cpus()
         smp_ops.init_early_smp()
     ...
     setup_processor()

How this helps:
 - Used for one time init of certain SMP centric IP blocks, before
   calling setup_processor() which probes various bits of core,
   possibly including this block

 - Currently platforms need to call this IP block init from their
   init routines, which doesn't make sense as this is specific to ARC
   core and not platform and otherwise requires copy/paste in all
   (and hence a possible point of failure)

e.g. MCIP init is called from 2 platforms currently (axs10x and sim)
which will go away once we have this.

This change only adds the hooks but they are empty for now. Next commit
will populate them and remove the explicit init calls from platforms.

Signed-off-by: Vineet Gupta

ARC: smp: Move default boot kick/wait code out of MCIP into common code

2015-10-17T12:18:27+00:00

For non halt-on-reset case, all cores start of simultaneously in @stext.
Master core0 proceeds with kernel boot, while other spin-wait on
@wake_flag being set by master once it is ready. So NO hardware assist
is needed for master to "kick" the others.

This patch moves this soft implementation out of mcip.c (as there is no
hardware assist) into common smp.c

Signed-off-by: Vineet Gupta

ARCv2: SMP: ARConnect debug/robustness

2015-06-22T08:36:57+00:00

- Handle possible interrupt coalescing from MCIP
- chk if prev IPI ack before sending new

Signed-off-by: Vineet Gupta

ARC: make plat_smp_ops weak to allow over-rides

2015-06-22T08:36:56+00:00

This allows platforms to provide their own cpu wakeup routines
as well as IPI send / clear backends, while allowing a SMP kernel w/o
any such backend to build/boot

Signed-off-by: Vineet Gupta

ARC: fix section mismatch with allyesconfig

2015-06-19T12:39:27+00:00

Signed-off-by: Vineet Gupta

ARC: use ACCESS_ONCE in cmpxchg loop

2015-02-02T11:38:37+00:00

Signed-off-by: Vineet Gupta