diff options
Diffstat (limited to 'arch/arm/lib/memcpy_rpi.S')
-rw-r--r-- | arch/arm/lib/memcpy_rpi.S | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/arch/arm/lib/memcpy_rpi.S b/arch/arm/lib/memcpy_rpi.S new file mode 100644 index 000000000000..30f8a9089a83 --- /dev/null +++ b/arch/arm/lib/memcpy_rpi.S @@ -0,0 +1,61 @@ +/* +Copyright (c) 2013, Raspberry Pi Foundation +Copyright (c) 2013, RISC OS Open Ltd +All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + * Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above copyright + notice, this list of conditions and the following disclaimer in the + documentation and/or other materials provided with the distribution. + * Neither the name of the copyright holder nor the + names of its contributors may be used to endorse or promote products + derived from this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND +ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY +DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND +ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + +#include <linux/linkage.h> +#include "arm-mem.h" +#include "memcpymove.h" + +/* Prevent the stack from becoming executable */ +#if defined(__linux__) && defined(__ELF__) +.section .note.GNU-stack,"",%progbits +#endif + + .text + .arch armv6 + .object_arch armv4 + .arm + .altmacro + .p2align 2 + +/* + * void *memcpy(void * restrict s1, const void * restrict s2, size_t n); + * On entry: + * a1 = pointer to destination + * a2 = pointer to source + * a3 = number of bytes to copy + * On exit: + * a1 preserved + */ + +.set prefetch_distance, 3 + +ENTRY(mmiocpy) +ENTRY(memcpy) + memcpy 0 +ENDPROC(memcpy) +ENDPROC(mmiocpy) |