[OpenBIOS] [PATCH 0/7] SPARC64 context improvements

[Mark Cave-Ayland]

This patchset improves the context handling in 2 ways: firstly it unifies
the context structures between switch_to() and CIF entry, and secondly fixes
up the context switch code enough so that we can switch and return from an
arbitrary PC address in testing.

This is a precursor to fixing up the load/init-program logic so that clients
are able access and alter their own context from Forth.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland at ilande.co.uk>

Mark Cave-Ayland (7):
  SPARC64: add parameter to indicate %cwp save/restore direction
  SPARC64: allocate space in context to save global registers
  SPARC64: save/restore global registers to context when entering CIF
  SPARC64: save CIF entry globals under the client stack
  SPARC64: introduce %pc into context and use it when exiting CIF
  SPARC64: split off general CPU registers into *_GENERAL_STATE macros
  SPARC64: switch entry.S over to use existing context macros

 arch/sparc64/call-client.S |   71 +++++++++++++++---------
 arch/sparc64/context.c     |    6 +--
 arch/sparc64/context.h     |    7 +--
 arch/sparc64/cpustate.h    |   98 ++++++++++++++++++++-------------
 arch/sparc64/entry.S       |   17 +++++-
 arch/sparc64/switch.S      |  129 ++++++++++++++++----------------------------
 6 files changed, 175 insertions(+), 153 deletions(-)

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1.7.10.4