[PATCH v2 0/4] ARC: handle DSP presence in HW

[Eugeniy Paltsev]

Arc processors may have DSP extension which is optional.
In this patch series we:
* Handle issues caused by DSP extension presence in HW
* Add optional support for DSP-enabled applications in
  userspace (with optional AGU extension support)

Changes v1->v2:
 * use r10:r11 register pair as a scratch for ASM code instead of
   r58:r59
 * reset DSP_CTRL to value suitable for kernel also in case of
   DSP for userspcae enabled
 * Use "Ir" instead of "I" parameter modifier to inline ASM
   to give compiler wiggle room.
 * Save / restore ACC0_GLO, ACC0_GHI only in case of context
   switch
 * Don't define additional options in headers to not introduce
   explicit include dependencies
 * Mode DSP config check to DSP code itself
 * Minor fixes

Eugeniy Paltsev (4):
  ARC: add helpers to sanitize config options
  ARC: handle DSP presence in HW
  ARC: add support for DSP-enabled userspace applications
  ARC: allow userspace DSP applications to use AGU extensions

 arch/arc/Kconfig                   |  50 +++++++++-
 arch/arc/include/asm/arcregs.h     |  26 +++++
 arch/arc/include/asm/asserts.h     |  34 +++++++
 arch/arc/include/asm/dsp-impl.h    | 150 +++++++++++++++++++++++++++++
 arch/arc/include/asm/dsp.h         |  29 ++++++
 arch/arc/include/asm/entry-arcv2.h |   6 ++
 arch/arc/include/asm/processor.h   |   4 +
 arch/arc/include/asm/ptrace.h      |   3 +
 arch/arc/include/asm/switch_to.h   |   2 +
 arch/arc/kernel/asm-offsets.c      |   4 +
 arch/arc/kernel/head.S             |   4 +
 arch/arc/kernel/setup.c            |  34 ++++---
 12 files changed, 332 insertions(+), 14 deletions(-)
 create mode 100644 arch/arc/include/asm/asserts.h
 create mode 100644 arch/arc/include/asm/dsp-impl.h
 create mode 100644 arch/arc/include/asm/dsp.h

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2.21.1