diff --git a/build/cmake/targets/mips64.cmake b/build/cmake/targets/mips64.cmake
new file mode 100644
index 0000000..84c73be
--- /dev/null
+++ b/build/cmake/targets/mips64.cmake
@@ -0,0 +1,28 @@
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+set(AOM_ARCH "mips64")
+set(ARCH_MIPS 1)
+
+# Assembly flavors available for the target.
+set(HAVE_MIPS64 1)
+
+# RTCD versions of assembly flavor flags ("yes" means on in rtcd.pl, not 1).
+set(RTCD_ARCH_MIPS "yes")
+
+if (HAVE_MSA)
+  set(RTCD_HAVE_MSA "yes")
+endif ()
+
+foreach (config_var ${AOM_CONFIG_VARS})
+  if (${${config_var}})
+    set(RTCD_${config_var} yes)
+  endif ()
+endforeach ()
diff --git a/build/cmake/targets/rtcd_templates/mips64.rtcd.cmake b/build/cmake/targets/rtcd_templates/mips64.rtcd.cmake
new file mode 100644
index 0000000..9245d6f
--- /dev/null
+++ b/build/cmake/targets/rtcd_templates/mips64.rtcd.cmake
@@ -0,0 +1,125 @@
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+ARCH_MIPS=${RTCD_ARCH_MIPS}
+HAVE_MIPS64=${RTCD_HAVE_MIPS64}
+HAVE_MSA=${RTCD_HAVE_MSA}
+
+CONFIG_ACCOUNTING=${RTCD_CONFIG_ACCOUNTING}
+CONFIG_INSPECTION=${RTCD_CONFIG_INSPECTION}
+CONFIG_ADAPT_SCAN=${RTCD_CONFIG_ADAPT_SCAN}
+CONFIG_ALT_INTRA=${RTCD_CONFIG_ALT_INTRA}
+CONFIG_ANS=${RTCD_CONFIG_ANS}
+CONFIG_AOM_HIGHBITDEPTH=${RTCD_CONFIG_AOM_HIGHBITDEPTH}
+CONFIG_AOM_QM=${RTCD_CONFIG_AOM_QM}
+CONFIG_AV1=${RTCD_CONFIG_AV1}
+CONFIG_AV1_DECODER=${RTCD_CONFIG_AV1_DECODER}
+CONFIG_AV1_ENCODER=${RTCD_CONFIG_AV1_ENCODER}
+CONFIG_BIG_ENDIAN=${RTCD_CONFIG_BIG_ENDIAN}
+CONFIG_BITSTREAM_DEBUG=${RTCD_CONFIG_BITSTREAM_DEBUG}
+CONFIG_CB4X4=${RTCD_CONFIG_CB4X4}
+CONFIG_CDEF=${RTCD_CONFIG_CDEF}
+CONFIG_CHROMA_2X2=${RTCD_CONFIG_CHROMA_2X2}
+CONFIG_CODEC_SRCS=${RTCD_CONFIG_CODEC_SRCS}
+CONFIG_COEFFICIENT_RANGE_CHECKING=${RTCD_CONFIG_COEFFICIENT_RANGE_CHECKING}
+CONFIG_COEF_INTERLEAVE=${RTCD_CONFIG_COEF_INTERLEAVE}
+CONFIG_COMPOUND_SEGMENT=${RTCD_CONFIG_COMPOUND_SEGMENT}
+CONFIG_CONVOLVE_ROUND=${RTCD_CONFIG_CONVOLVE_ROUND}
+CONFIG_DAALA_DIST=${RTCD_CONFIG_DAALA_DIST}
+CONFIG_DAALA_EC=${RTCD_CONFIG_DAALA_EC}
+CONFIG_DEBUG=${RTCD_CONFIG_DEBUG}
+CONFIG_DEBUG_LIBS=${RTCD_CONFIG_DEBUG_LIBS}
+CONFIG_DECODERS=${RTCD_CONFIG_DECODERS}
+CONFIG_DECODE_PERF_TESTS=${RTCD_CONFIG_DECODE_PERF_TESTS}
+CONFIG_DELTA_Q=${RTCD_CONFIG_DELTA_Q}
+CONFIG_DEPENDENCY_TRACKING=${RTCD_CONFIG_DEPENDENCY_TRACKING}
+CONFIG_DEPENDENT_HORZTILES=${RTCD_CONFIG_DEPENDENT_HORZTILES}
+CONFIG_DUAL_FILTER=${RTCD_CONFIG_DUAL_FILTER}
+CONFIG_EC_ADAPT=${RTCD_CONFIG_EC_ADAPT}
+CONFIG_EC_MULTISYMBOL=${RTCD_CONFIG_EC_MULTISYMBOL}
+CONFIG_EMULATE_HARDWARE=${RTCD_CONFIG_EMULATE_HARDWARE}
+CONFIG_ENCODERS=${RTCD_CONFIG_ENCODERS}
+CONFIG_ENCODE_PERF_TESTS=${RTCD_CONFIG_ENCODE_PERF_TESTS}
+CONFIG_ENTROPY=${RTCD_CONFIG_ENTROPY}
+CONFIG_ENTROPY_STATS=${RTCD_CONFIG_ENTROPY_STATS}
+CONFIG_ERROR_CONCEALMENT=${RTCD_CONFIG_ERROR_CONCEALMENT}
+CONFIG_EXPERIMENTAL=${RTCD_CONFIG_EXPERIMENTAL}
+CONFIG_EXTERNAL_BUILD=${RTCD_CONFIG_EXTERNAL_BUILD}
+CONFIG_EXT_INTER=${RTCD_CONFIG_EXT_INTER}
+CONFIG_EXT_INTRA=${RTCD_CONFIG_EXT_INTRA}
+CONFIG_EXT_PARTITION=${RTCD_CONFIG_EXT_PARTITION}
+CONFIG_EXT_PARTITION_TYPES=${RTCD_CONFIG_EXT_PARTITION_TYPES}
+CONFIG_EXT_REFS=${RTCD_CONFIG_EXT_REFS}
+CONFIG_EXT_TILE=${RTCD_CONFIG_EXT_TILE}
+CONFIG_EXT_TX=${RTCD_CONFIG_EXT_TX}
+CONFIG_FILTER_7BIT=${RTCD_CONFIG_FILTER_7BIT}
+CONFIG_FILTER_INTRA=${RTCD_CONFIG_FILTER_INTRA}
+CONFIG_FP_MB_STATS=${RTCD_CONFIG_FP_MB_STATS}
+CONFIG_FRAME_SIZE=${RTCD_CONFIG_FRAME_SIZE}
+CONFIG_GCC=${RTCD_CONFIG_GCC}
+CONFIG_GCOV=${RTCD_CONFIG_GCOV}
+CONFIG_GLOBAL_MOTION=${RTCD_CONFIG_GLOBAL_MOTION}
+CONFIG_GPROF=${RTCD_CONFIG_GPROF}
+CONFIG_INSTALL_BINS=${RTCD_CONFIG_INSTALL_BINS}
+CONFIG_INSTALL_DOCS=${RTCD_CONFIG_INSTALL_DOCS}
+CONFIG_INSTALL_LIBS=${RTCD_CONFIG_INSTALL_LIBS}
+CONFIG_INSTALL_SRCS=${RTCD_CONFIG_INSTALL_SRCS}
+CONFIG_INTERNAL_STATS=${RTCD_CONFIG_INTERNAL_STATS}
+CONFIG_INTRA_INTERP=${RTCD_CONFIG_INTRA_INTERP}
+CONFIG_LIBYUV=${RTCD_CONFIG_LIBYUV}
+CONFIG_LOOPFILTERING_ACROSS_TILES=${RTCD_CONFIG_LOOPFILTERING_ACROSS_TILES}
+CONFIG_LOOP_RESTORATION=${RTCD_CONFIG_LOOP_RESTORATION}
+CONFIG_LOWBITDEPTH=${RTCD_CONFIG_LOWBITDEPTH}
+CONFIG_LV_MAP=${RTCD_CONFIG_LV_MAP}
+CONFIG_MASKED_TX=${RTCD_CONFIG_MASKED_TX}
+CONFIG_MOTION_VAR=${RTCD_CONFIG_MOTION_VAR}
+CONFIG_MSVS=${RTCD_CONFIG_MSVS}
+CONFIG_MULTITHREAD=${RTCD_CONFIG_MULTITHREAD}
+CONFIG_MV_COMPRESS=${RTCD_CONFIG_MV_COMPRESS}
+CONFIG_NCOBMC=${RTCD_CONFIG_NCOBMC}
+CONFIG_NEW_QUANT=${RTCD_CONFIG_NEW_QUANT}
+CONFIG_NEW_TOKENSET=${RTCD_CONFIG_NEW_TOKENSET}
+CONFIG_ONTHEFLY_BITPACKING=${RTCD_CONFIG_ONTHEFLY_BITPACKING}
+CONFIG_OS_SUPPORT=${RTCD_CONFIG_OS_SUPPORT}
+CONFIG_PALETTE=${RTCD_CONFIG_PALETTE}
+CONFIG_PALETTE_THROUGHPUT=${RTCD_CONFIG_PALETTE_THROUGHPUT}
+CONFIG_PARALLEL_DEBLOCKING=${RTCD_CONFIG_PARALLEL_DEBLOCKING}
+CONFIG_PIC=${RTCD_CONFIG_PIC}
+CONFIG_POSTPROC=${RTCD_CONFIG_POSTPROC}
+CONFIG_POSTPROC_VISUALIZER=${RTCD_CONFIG_POSTPROC_VISUALIZER}
+CONFIG_PVQ=${RTCD_CONFIG_PVQ}
+CONFIG_RAWBITS=${RTCD_CONFIG_RAWBITS}
+CONFIG_RD_DEBUG=${RTCD_CONFIG_RD_DEBUG}
+CONFIG_REALTIME_ONLY=${RTCD_CONFIG_REALTIME_ONLY}
+CONFIG_RECT_TX=${RTCD_CONFIG_RECT_TX}
+CONFIG_REFERENCE_BUFFER=${RTCD_CONFIG_REFERENCE_BUFFER}
+CONFIG_REF_ADAPT=${RTCD_CONFIG_REF_ADAPT}
+CONFIG_REF_MV=${RTCD_CONFIG_REF_MV}
+CONFIG_RUNTIME_CPU_DETECT=${RTCD_CONFIG_RUNTIME_CPU_DETECT}
+CONFIG_RVCT=${RTCD_CONFIG_RVCT}
+CONFIG_SHARED=${RTCD_CONFIG_SHARED}
+CONFIG_SIZE_LIMIT=${RTCD_CONFIG_SIZE_LIMIT}
+CONFIG_SMALL=${RTCD_CONFIG_SMALL}
+CONFIG_SPATIAL_RESAMPLING=${RTCD_CONFIG_SPATIAL_RESAMPLING}
+CONFIG_STATIC=${RTCD_CONFIG_STATIC}
+CONFIG_STATIC_MSVCRT=${RTCD_CONFIG_STATIC_MSVCRT}
+CONFIG_SUB8X8_MC=${RTCD_CONFIG_SUB8X8_MC}
+CONFIG_SUPERTX=${RTCD_CONFIG_SUPERTX}
+CONFIG_TEMPMV_SIGNALING=${RTCD_CONFIG_TEMPMV_SIGNALING}
+CONFIG_TILE_GROUPS=${RTCD_CONFIG_TILE_GROUPS}
+CONFIG_TPL_MV=${RTCD_CONFIG_TPL_MV}
+CONFIG_TRIPRED=${RTCD_CONFIG_TRIPRED}
+CONFIG_TX64X64=${RTCD_CONFIG_TX64X64}
+CONFIG_UNIT_TESTS=${RTCD_CONFIG_UNIT_TESTS}
+CONFIG_UNPOISON_PARTITION_CTX=${RTCD_CONFIG_UNPOISON_PARTITION_CTX}
+CONFIG_VAR_TX=${RTCD_CONFIG_VAR_TX}
+CONFIG_WARPED_MOTION=${RTCD_CONFIG_WARPED_MOTION}
+CONFIG_WEBM_IO=${RTCD_CONFIG_WEBM_IO}
+CONFIG_XIPHRC=${RTCD_CONFIG_XIPHRC}
diff --git a/build/cmake/toolchains/mips32-linux-gcc.cmake b/build/cmake/toolchains/mips32-linux-gcc.cmake
index 7a00534..a55c411 100644
--- a/build/cmake/toolchains/mips32-linux-gcc.cmake
+++ b/build/cmake/toolchains/mips32-linux-gcc.cmake
@@ -40,6 +40,8 @@
 endif ()
 
 if ("${CROSS}" STREQUAL "")
+  # TODO(tomfinegan): Make it possible to turn this off. The $CROSS prefix
+  # won't be desired on a mips host.
   # Default cross compiler prefix to something that might work for an
   # unoptimized build.
   set(CROSS mips-linux-gnu-)
diff --git a/build/cmake/toolchains/mips64-linux-gcc.cmake b/build/cmake/toolchains/mips64-linux-gcc.cmake
new file mode 100644
index 0000000..28b1582
--- /dev/null
+++ b/build/cmake/toolchains/mips64-linux-gcc.cmake
@@ -0,0 +1,48 @@
+##
+## Copyright (c) 2017, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+if (NOT AOM_BUILD_CMAKE_TOOLCHAINS_MIPS64_LINUX_GCC_CMAKE_)
+set(AOM_BUILD_CMAKE_TOOLCHAINS_MIPS64_LINUX_GCC_CMAKE_ 1)
+
+set(CMAKE_SYSTEM_NAME "Linux")
+
+if ("${CROSS}" STREQUAL "")
+  # TODO(tomfinegan): Make it possible to turn this off. The $CROSS prefix
+  # won't be desired on a mips host.
+  # Default the cross compiler prefix to something known to work.
+  set(CROSS mips-img-linux-gnu-)
+endif ()
+
+if (ENABLE_MSA)
+  set(HAVE_MSA 1 CACHE BOOL "" FORCE)
+  set(MIPS_CFLAGS "-mmsa")
+  set(MIPS_CXXFLAGS "-mmsa")
+endif ()
+
+if ("${MIPS_CPU}" STREQUAL "i6400" OR "${MIPS_CPU}" STREQUAL "p6600")
+  set(MIPS_CPU_FLAGS "-mips64r6 -mabi=64 -mload-store-pairs -msched-weight")
+  set(MIPS_CPU_FLAGS "${MIPS_CPU_FLAGS} -mhard-float -mfp64")
+  set(MIPS_CFLAGS "${MIPS_CFLAGS} ${MIPS_CPU_FLAGS}")
+  set(MIPS_CXXFLAGS "${MIPS_CXXFLAGS} ${MIPS_CPU_FLAGS}")
+  set(CMAKE_EXE_LINKER_FLAGS
+      "-mips64r6 -mabi64 -mfp64 ${CMAKE_EXE_LINKER_FLAGS}")
+endif ()
+
+set(CMAKE_C_COMPILER ${CROSS}gcc)
+set(CMAKE_CXX_COMPILER ${CROSS}g++)
+set(AS_EXECUTABLE ${CROSS}as)
+set(CMAKE_C_COMPILER_ARG1 "-EL ${MIPS_CFLAGS}")
+set(CMAKE_CXX_COMPILER_ARG1 "-EL ${MIPS_CXXFLAGS}")
+set(CMAKE_SYSTEM_PROCESSOR "mips64")
+
+# No runtime cpu detect for mips64-linux-gcc.
+set(CONFIG_RUNTIME_CPU_DETECT 0 CACHE BOOL "")
+
+endif ()  # AOM_BUILD_CMAKE_TOOLCHAINS_MIPS64_LINUX_GCC_CMAKE_