Messages in this thread Patch in this message | | | From | Vineet Gupta <> | Subject | [PATCH 1/4] ARC: Handle zero-overhead-loop in unaligned access handler | Date | Fri, 27 Sep 2013 16:27:34 +0530 |
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From: Mischa Jonker <mjonker@synopsys.com>
If a load or store is the last instruction in a zero-overhead-loop, and it's misaligned, the loop would execute only once.
This fixes that problem.
Signed-off-by: Mischa Jonker <mjonker@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com> --- arch/arc/kernel/unaligned.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/arch/arc/kernel/unaligned.c b/arch/arc/kernel/unaligned.c index 28d1700..7ff5b5c 100644 --- a/arch/arc/kernel/unaligned.c +++ b/arch/arc/kernel/unaligned.c @@ -245,6 +245,12 @@ int misaligned_fixup(unsigned long address, struct pt_regs *regs, regs->status32 &= ~STATUS_DE_MASK; } else { regs->ret += state.instr_len; + + /* handle zero-overhead-loop */ + if ((regs->ret == regs->lp_end) && (regs->lp_count)) { + regs->ret = regs->lp_start; + regs->lp_count--; + } } return 0; -- 1.8.1.2
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