linux/arch/arc/kernel/unaligned.c, branch v3.18

ARC: Handle zero-overhead-loop in unaligned access handler

2013-09-27T10:58:23Z

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 Signed-off-by: Vineet Gupta

ARC: Handle un-aligned user space access in BE.

2013-09-05T05:01:11Z

Adding endian awarness to un-aligned access exception handling. Signed-off-by: Noam Camus Signed-off-by: Vineet Gupta

ARC: Remove explicit passing around of ECR

2013-06-26T10:00:50Z

With ECR now part of pt_regs * No need to propagate from lowest asm handlers as arg * No need to save it in tsk->thread.cause_code * Avoid bit chopping to access the bit-fields More code consolidation, cleanup Signed-off-by: Vineet Gupta

ARC: Unaligned access emulation

2013-02-15T17:46:06Z

ARC700 doesn't natively support unaligned access, but can be emulated -Unaligned Access Exception -Disassembly at the Fault address to find the exact insn (long/short) Also per Arnd's comment, we runtime control it using 2 sysctl knobs: * SYSCTL_ARCH_UNALIGN_ALLOW: Runtime enable/disble * SYSCTL_ARCH_UNALIGN_NO_WARN: Warn on each emulation attempt Originally contributed by Tim Yao Signed-off-by: Vineet Gupta Cc: Tim Yao Acked-by: Arnd Bergmann