linux-stable.git/arch/arc/kernel/setup.c, branch v4.6.4

ARCv2: ioremap: Support dynamic peripheral address space

2016-03-19T09:04:10+00:00

The peripheral address space is architectural address window which is
uncached and typically used to wire up peripherals.

For ARC700 cores (ARCompact ISA based) this was fixed to 1GB region
0xC000_0000 - 0xFFFF_FFFF.

For ARCv2 based HS38 cores the start address is flexible and can be
0xC, 0xD, 0xE, 0xF 000_000 by programming AUX_NON_VOLATILE_LIMIT reg
(typically done in bootloader)

Further in cas of PAE, the physical address can extend beyond 4GB so
need to confine this check, otherwise all pages beyond 4GB will be
treated as uncached

Signed-off-by: Vineet Gupta

arc: use of_platform_default_populate() to populate default bus

2016-03-17T12:15:15+00:00

Use helper of_platform_default_populate() in linux/of_platform
when possible, instead of calling of_platform_populate() with
the default match table.

Signed-off-by: Kefeng Wang 
Signed-off-by: Vineet Gupta

ARCv2: LLSC: software backoff is NOT needed starting HS2.1c

2016-03-15T10:34:44+00:00

Signed-off-by: Vineet Gupta

ARCv2: boot report CCMs (Closely Coupled Memories)

2016-02-18T12:00:18+00:00

- ARCv2 uses a seperate BCR for {I,D}CCM base address:
  ARCompact encoded both base/size in same BCR

- Size encoding in common BCR is different for ARCompact/ARCv2

Signed-off-by: Vineet Gupta

ARC: Assume multiplier is always present

2016-02-18T12:00:03+00:00

It is unlikely that designs running Linux will not have multiplier.
Further the current support is not complete as tool don't generate a
multilib w/o multiplier.

Signed-off-by: Vineet Gupta

ARCv2: Check for LL-SC livelock only if LLSC is enabled

2016-01-29T11:21:04+00:00

Signed-off-by: Vineet Gupta

ARC: shrink cpuinfo by not saving full timer BCR

2016-01-29T11:21:03+00:00

Signed-off-by: Vineet Gupta

ARC: dw2 unwind: Reinstante unwinding out of modules

2015-12-17T05:40:23+00:00

The fix which removed linear searching of dwarf (because binary lookup
data always exists) missed out on the fact that modules don't get the
binary lookup tables info. This caused unwinding out of modules to stop
working.

So add binary lookup header setup (equivalent of eh_frame_hdr setup) to
modules as well.

While at it, confine the header setup to within unwinder code,
reducing one API exposed out of unwinder code.

Fixes: 2e22502c080f ARC: dw2 unwind: Remove falllback linear search thru FDE entries
Cc: 
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: boot log: move helper macros to header for reuse

2015-10-17T12:18:25+00:00

Signed-off-by: Vineet Gupta