In an attempt to understand how tftp booting works
I looked at unifying piggyback_32 and piggyback_64.
Due to subtle differences I did not succeed in the
unification - at least not this time around.
But I anyway created a few patches that removes
a few differences between sparc and sparc64.
And piggyback_32 gained a lot in readability
as I have documented my findings using a few comments.
In the process I also removed ELF support from piggyback_32,
as it was not used.
The set of patches has been boot tested on sparc.
And build tested on sparc64.
Note: I have not updated piggyback_64.c because the plan was/is
that piggyback_32 shall support both sparc and sparc64.
Sam
Sam Ravnborg (5):
sparc: refactor piggy_32.c
sparc: use trapbase in setup_arch
sparc: use _start for the start entry (like 64 bit does)
sparc: additional comments to piggyback_32.c
sparc: remove obsolete ELF support in piggyback_32.c
arch/sparc/boot/piggyback_32.c | 174 +++++++++++++++++++++++++++-------------
arch/sparc/kernel/head_32.S | 3 +-
arch/sparc/kernel/setup_32.c | 3 +-
arch/sparc/mm/sun4c.c | 8 +-
4 files changed, 124 insertions(+), 64 deletions(-)
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