sh: shared register saving code for sh3/sh4/sh4a

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This patch reworks the sh3/sh4/sh4a register saving code in
the following ways:
 - break out prepare_stack_save_dsp() from handle_exception()
 - break out save_regs() from handle_exception()
 - the register saving order is unchanged
 - align new functions to fit in cache lines
 - separate exception code from interrupt code
 - keep main code flow in a single cache line per exception vector
 - use bsr/rts for regular functions (save pr first)
 - keep data in one shared cache line (exception_data)
 - document the functions
 - tie in the hp6xx code

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

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This commit is contained in:

Magnus Damm 2009-02-23 07:14:02 +00:00 • committed by Paul Mundt

parent b233b28eac

commit 1d015cf02a

2 changed files with 155 additions and 149 deletions

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31

arch/sh/boards/mach-hp6xx/pm_wakeup.S

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281

arch/sh/kernel/cpu/sh3/entry.S

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