| commit | b4d815468b338ea6daa03374331edd228b8a3e31 | [log] [tgz] |
|---|---|---|
| author | Michael Munday <mike.munday@lowrisc.org> | Fri Jun 04 11:49:54 2021 +0100 |
| committer | Michael Munday <mike.munday@lowrisc.org> | Wed Jun 30 15:38:45 2021 +0100 |
| tree | 644bb18e78fdb302a558373c93e98ebab7e22aa2 | |
| parent | 26b0ff4b57916f2b292e8ac1bac76ec62a94c6f3 [diff] |
[mask_rom] Add Memory Protection (ePMP) module implementation This is an implementation of the memory protection specification with most configuration done in assembly. A C API is also provided to make the ROM_EXT image executable. A shadow copy of the PMP configuration registers is maintained by the mask ROM and may be checked against the hardware register values using the `epmp_state_check` function. A note on test status: The ePMP configuration for the mask ROM prevents access to the DV address space. Tests write to the DV address space to signal their status. Therefore all tests booted from the mask ROM will fail unless they modify the ePMP configuration. For the time being this ePMP reconfiguration is performed in the ROM_EXT so that the tests continue to pass without modification. This is intended to be a temporary measure and this functionality should be absorbed into one of the test libraries. Signed-off-by: Michael Munday <mike.munday@lowrisc.org>
OpenTitan is an open source silicon Root of Trust (RoT) project. OpenTitan will make the silicon RoT design and implementation more transparent, trustworthy, and secure for enterprises, platform providers, and chip manufacturers. OpenTitan is administered by lowRISC CIC as a collaborative project to produce high quality, open IP for instantiation as a full-featured product. See the OpenTitan site and OpenTitan docs for more information about the project.
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