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ARC: Exception Handlers Code consolidation

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After the recent cleanups, all the exception handlers now have same
boilerplate prologue code. Move that into common macro.

This reduces readability but helps greatly with sharing / duplicating
entry code with ARCv2 ISA where the handlers are pretty much the same,
just the entry prologue is different (due to hardware assist).

Also while at it, add the missing FAKE_RET_FROM_EXCPN calls in couple of
places to drop down to pure kernel mode (from exception mode) before
jumping off into "C" code.

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta
2013-07-09 15:07:13 +05:30
parent fe240f11cd
commit 37f3ac498c
3 changed files with 37 additions and 51 deletions
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8
arch/arc/mm/tlbex.S
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@@ -371,13 +371,7 @@ do_slow_path_pf:
; Slow path TLB Miss handled as a regular ARC Exception
; (stack switching / save the complete reg-file).
; That requires freeing up r9
EXCPN_PROLOG_FREEUP_REG r9
lr r9, [erstatus]
SWITCH_TO_KERNEL_STK
SAVE_ALL_SYS
EXCEPTION_PROLOGUE
; ------- setup args for Linux Page fault Hanlder ---------
mov_s r0, sp