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4 Commits

Author SHA1 Message Date
Vineet Gupta
5793e273a1 ARC: intc: split into ARCompact ISA specific, common bits 
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
 2015-06-19 18:09:40 +05:30
Vineet Gupta
5a343b9fe2 ARC: entry.S: [arcompact] simplify SWITCH_TO_KERNEL_STK 
Previously this macro was overloaded with stack switching, saving SP at right
slot in pt_regs, saving/setup of r25 and setting SP baseline to where
pt_regs->sp is saved (vs. bottom of pt_regs)

Now it only does SP switch, and leaves SP pointing to bottom of pt_regs.

r25 saving is no longer done here to allow for future reordering of
regfile in pt_regs w/o touching this macro

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
 2015-06-19 18:09:40 +05:30
Vineet Gupta
62fb64034d ARC: entry.S: micro-optimize Trap handler 
Elide the need to re-read ECR in Trap handler by ensuring that
EXCEPTION_PROLOGUE does that at the very end just before returning
to Trap handler

ARCv2 EXCEPTION_PROLOGUE already did that, so same for ARcompact and the
common trap handler adjusted to use cached ECR

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
 2015-06-19 18:09:39 +05:30
Vineet Gupta
6d1a20b1d2 ARC: entry.S: split into ARCompact ISA specific, common bits 
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
 2015-06-19 18:09:38 +05:30