2e651ea159
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 <tim.yao@amlogic.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: Tim Yao <tim.yao@amlogic.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
29 lines
797 B
C
29 lines
797 B
C
/*
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* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef _ASM_ARC_UNALIGNED_H
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#define _ASM_ARC_UNALIGNED_H
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/* ARC700 can't handle unaligned Data accesses. */
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#include <asm-generic/unaligned.h>
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#include <asm/ptrace.h>
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#ifdef CONFIG_ARC_MISALIGN_ACCESS
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int misaligned_fixup(unsigned long address, struct pt_regs *regs,
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unsigned long cause, struct callee_regs *cregs);
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#else
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static inline int
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misaligned_fixup(unsigned long address, struct pt_regs *regs,
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unsigned long cause, struct callee_regs *cregs)
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{
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return 0;
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}
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#endif
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#endif /* _ASM_ARC_UNALIGNED_H */
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