[PATCH 00/24] Implement load/init-program as per IEEE-1275 specification

[Mark Cave-Ayland]

The current implementation of load/init-program has some fairly big hacks in order
to work around the fact that we don't have per-architecture CPU contexts. An
example of this is chained bootloaders used for SPARC64 which use Forth to alter
the saved CPU context so that control is returned to a different address by
directly executing init-program before return.

With all architectures now able to save/restore CPU contexts, these hacks can now
be removed and init-program changed to be a single per-architecture implementation
along with some associated tidy-ups.

I've given this a fairly thorough testing across all my OpenBIOS test images and
as far as I can tell doesn't cause any regressions.

Requires the previously posted SPARC32 and SPARC64 context patches to be applied
first.

Signed-off-by: Mark Cave-Ayland

Mark Cave-Ayland (24):
  libopenbios: rename saved-program-state to load-state
  libopenbios: introduce arch_init_program() in preparation for
    per-arch implementations
  all: create client program context once at startup
  client.fs: add load-state param variable
  amd64: introduce arch_init_program() implementation
  ppc: introduce arch_init_program() implementation
  SPARC32: introduce arch_init_program() implementation
  SPARC64: introduce arch_init_program() implementation
  x86: introduce arch_init_program() implementation
  libopenbios: add context wrappers for Fcode/Forth payloads
  SPARC32: move Forth/FCode over to use new context wrappers
  SPARC64: move Forth/FCode over to use new context wrappers
  x86: move Forth/FCode over to use new context wrappers
  elf: set boot notes in elf_load() if supplied
  SPARC64: remove start_client_image()
  libopenbios: move prototypes for start_elf() and __context into
    libopenbios
  libopenbios: move go() function into libopenbios
  aout: implement load/init-program as per IEEE-1275 specification
  bootcode: implement load/init-program as per IEEE-1275 specification
  elf: implement load/init-program as per IEEE-1275 specification
  fcode: implement load/init-program as per IEEE-1275 specification
  forth: implement load/init-program as per IEEE-1275 specification
  libopenbios: remove conditional logic from go()
  libopenbios: remove address parameter from start_elf()

arch/amd64/context.c                |   51 ++++++++++++++++++++-----
 arch/ppc/qemu/context.c             |   67 ++++++++++++++++++++++-----------
 arch/ppc/qemu/init.c                |   14 ++-----
 arch/sparc32/boot.c                 |   71 ++++-------------------------------
 arch/sparc32/boot.h                 |    6 +--
 arch/sparc32/context.c              |   39 +++++++++++++++----
 arch/sparc32/openbios.c             |    2 +-
 arch/sparc64/boot.c                 |   54 +-------------------------
 arch/sparc64/boot.h                 |    6 ---
 arch/sparc64/context.c              |   68 ++++++++++++++++++++-------------
 arch/sparc64/openbios.c             |    1 -
 arch/unix/boot.c                    |   13 +++++++
 arch/x86/boot.c                     |   53 +-------------------------
 arch/x86/boot.h                     |    6 +--
 arch/x86/context.c                  |   52 ++++++++++++++++++++-----
 arch/x86/openbios.c                 |    1 -
 forth/debugging/client.fs           |   30 ++++++++-------
 include/libopenbios/bootcode_load.h |    2 +
 include/libopenbios/initprogram.h   |    9 +++++
 libopenbios/aout_load.c             |   48 +++++++++++------------
 libopenbios/bootcode_load.c         |   33 +++++++++++++---
 libopenbios/elf_load.c              |   28 +++++++-------
 libopenbios/fcode_load.c            |   32 ++++++----------
 libopenbios/forth_load.c            |   30 +++++++--------
 libopenbios/init.c                  |    3 ++
 libopenbios/initprogram.c           |   45 ++++++++++++++++++++++
 libopenbios/load.c                  |   47 ++++++++---------------
 libopenbios/xcoff_load.c            |    8 ++--
 28 files changed, 417 insertions(+), 402 deletions(-)