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81496315f2
iPXE runs only in environments that support unaligned accesses to RAM. However, memcpy() and memset() are also used to write to graphical framebuffer memory, which may support only aligned accesses on some CPU architectures such as ARM. Restructure the 64-bit ARM memcpy() and memset() routines along the lines of the RISC-V implementations, which split the region into pre-aligned, aligned, and post-aligned sections. Signed-off-by: Michael Brown <mcb30@ipxe.org>