After the first time system_mode is set to one, the assets will no
longer be read- or writeable, even if system_mode is set to zero at a
later syscall. This is to make sure syscalls does not have the same
privilege as the firmware has at first boot.
We need to monitor when system_mode is set to one, otherwise we might
accedentially lock the assets before actually leaving firmware, for
example if firmware would use a function set in any of the registers
used in system_mode_ctrl.
Co-authored-by: Mikael Ågren <mikael@tillitis.se>
- The API changes name from `_SWITCH_APP` to `_SYSTEM_MODE_CTRL`.
- The registers and wires changes name to `system_mode_*`, instead of a
mix of `switch_app_*` and `fw_app_mode`.
The removal is coordinated and approved by YosysHQ, and are removed
to keep our headers uniform. These files were written on behalf of
Tillitis.
Two typos was corrected as well.
Describe how the UDI and UDS are actually stored in the FPGA, how they
are accessed, and how they are initialled by the patch_uds_udi.py
script.
Co-authored-by: Joachim Strömbergson <joachim@assured.se>
By patching the UDS and UDI into an already built bitstream, it is now
not necessary to rebuild the entire build flow when changing the UDS
and the UDI. This lowers re-build times significantly.
Signed-off-by: Joachim Strömbergson <joachim@assured.se>
Silence lint on intentional combinatinal loops
Use better instance names, and a single lint pragma for all macros
Remove unused pointer update signals
Silence lint on wires where not all bits are used
Change fw_app_mode to be an input port to allow access control
Remove redundant, unused wire mem_busy
Add lint pragma to ignore debug register only enabled by a define
Remove clk and reset_n ports from the ROM
Adding note and lint pragma for rom address width
Fix incorrect register widths in uart_core
Assign all 16 bits in LUT config
Silence lint warnings on macro instances
Correct bit extraction for core addresses to be eight bits wide
Correct the bit width of cdi_mem_we wire
Add specific output file for logging lint issues
Correct bit width of tmp_ready to match one bit ready port
