The relevant page [Debug Spec v1.0.0-STABLE, p.53] gives the following
priorities for resolving multiple concurrent reasons for entering debug mode....
DCSR.cause : Explains why Debug Mode was entered.
When there are multiple reasons to enter Debug Mode in a single cycle,
hardware should set cause to the cause with the highest priority.
1: An ebreak instruction was executed. (priority 3)
2: A Trigger Module trigger fired with action=1. (priority 4)
3: The debugger requested entry to Debug Mode using haltreq. (priority 1)
4: The hart single stepped because step was set. (priority 0, lowest)
5: The hart halted directly out of reset due to resethaltreq. (priority 2)
It is also acceptable to report 3 when this happens.
6: The hart halted because it’s part of a halt group. (priority 5, highest)
Harts may report 3 for this cause instead.
Other values are reserved for future use.
Co-authored-by: Harry Callahan <hcallahan@lowrisc.org>
* remove parameter BranchPredictor
Signed-off-by: Szymon Bieganski <szymon.bieganski@oss.nxp.com>
* Remove references to the removed parameter(s) from examples
Signed-off-by: Szymon Bieganski <szymon.bieganski@oss.nxp.com>
* remove references to the removed parameters from compliance verification
Signed-off-by: Szymon Bieganski <szymon.bieganski@oss.nxp.com>
* remove references to the removed parameters from core lists
Signed-off-by: Szymon Bieganski <szymon.bieganski@oss.nxp.com>
* remove references to the removed parameters from the example configurations
Signed-off-by: Szymon Bieganski <szymon.bieganski@oss.nxp.com>
* Remove references to the removed parameter from documentation
Signed-off-by: Szymon Bieganski <szymon.bieganski@oss.nxp.com>
* Remove related and dead code
Signed-off-by: Szymon Bieganski <szymon.bieganski@oss.nxp.com>
---------
Signed-off-by: Szymon Bieganski <szymon.bieganski@oss.nxp.com>
Co-authored-by: Szymon Bieganski <szymon.bieganski@oss.nxp.com>
* remove parameter option WritebackStage
Signed-off-by: Szymon Bieganski <szymon.bieganski@oss.nxp.com>
* remove references to the removed parameters from examples
Signed-off-by: Szymon Bieganski <szymon.bieganski@oss.nxp.com>
* remove references to the removed parameters from compliance verification
Signed-off-by: Szymon Bieganski <szymon.bieganski@oss.nxp.com>
* remove references to the removed parameters from formal verification code generated for SymbioticEDA
Signed-off-by: Szymon Bieganski <szymon.bieganski@oss.nxp.com>
* Remove reference to the deleted parameterd from the documentation
Do not refer to WriteBack as to a stage
Signed-off-by: Szymon Bieganski <szymon.bieganski@oss.nxp.com>
* Remove related code to Writeback stage
Signed-off-by: Szymon Bieganski <szymon.bieganski@oss.nxp.com>
* Removal of related and dead code after Writeback-stage removal
Signed-off-by: Szymon Bieganski <szymon.bieganski@oss.nxp.com>
* substitute ASSERT macro with one ignoring rst_ni and clk signals
Signed-off-by: Szymon Bieganski <szymon.bieganski@oss.nxp.com>
* keep clk_i and rst_ni for the sake of assert alone
Signed-off-by: Szymon Bieganski <szymon.bieganski@oss.nxp.com>
* BUGFIX: reintroduce en_wb signal between id and wb
Signed-off-by: Szymon Bieganski <szymon.bieganski@oss.nxp.com>
---------
Signed-off-by: Szymon Bieganski <szymon.bieganski@oss.nxp.com>
Co-authored-by: Szymon Bieganski <szymon.bieganski@oss.nxp.com>
When in the FLUSH state we cannot have `csr_pipe_flush` set as it
depends upon `instr_executing` being set (within `ibex_id_stage`) and
that is only set in the DECODE stage.
Co-authored-by: Greg Chadwick <gac@lowrisc.org>
