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由 Punit Agrawal 提交于
The SWP instruction was deprecated in the ARMv6 architecture. The ARMv7 multiprocessing extensions mandate that SWP/SWPB instructions are treated as undefined from reset, with the ability to enable them through the System Control Register SW bit. With ARMv8, the option to enable these instructions through System Control Register was dropped as well. To support legacy applications using these instructions, port the emulation of the SWP and SWPB instructions from the arm port to arm64. Reviewed-by: NCatalin Marinas <catalin.marinas@arm.com> Signed-off-by: NPunit Agrawal <punit.agrawal@arm.com> Signed-off-by: NWill Deacon <will.deacon@arm.com>
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