mirror of
https://github.com/Telecominfraproject/OpenCellular.git
synced 2025-12-28 10:45:22 +00:00
da87d12ec8
Some ECs such as the MEC1322 have a data RAM optimized region as well as a code RAM optimized region. We discovered that we could save quite a bit more space by reusing the a portion of the code RAM region as an additional .bss section. However, this region resides in the code RAM region. If on the same cycle the processor fetches an instruction and does a load or store to this code RAM region, the data access will be delayed by one cycle. Hence, the naming of ``.bss.slow" section. For boards which do not define CONFIG_REUSE_LOADER_WITH_BSS_SLOW, all objects bearing this tag will be simply appended to the existing .bss section. BUG=chrome-os-partner:46056 BUG=chrome-os-partner:46063 BRANCH=None TEST=make -j buildall tests CQ-DEPEND=CL:306173 Change-Id: I126fbeee5255732a6dd6fea1d4557fc2b2c62c96 Signed-off-by: Aseda Aboagye <aaboagye@google.com> Reviewed-on: https://chromium-review.googlesource.com/311209 Commit-Ready: Aseda Aboagye <aaboagye@chromium.org> Tested-by: Aseda Aboagye <aaboagye@chromium.org> Reviewed-by: Randall Spangler <rspangler@chromium.org>
For an overview of the Embedded Controller firmware, refer to http://www.chromium.org/chromium-os/2014-firmware-summit