The following table lists the instantiation parameters of rstmgr.
| Parameter | Default | Description |
|---|
SecCheck | 1 | Enables reset consistency checks on the leaf reset. Each check contains a small FSM. |
SecMaxSyncDelay | 2 | The default synchronization delay assumptions used in reset consistency checks. If a design uses a sync cell with more stages of delay, that value should be supplied. |
Referring to the Comportable guideline for peripheral device functionality, the module rstmgr has the following hardware interfaces defined
- Primary Clock:
clk_i
- Other Clocks:
clk_aon_i, clk_io_div4_i, clk_main_i, clk_io_i, clk_io_div2_i, clk_usb_i, clk_por_i
- Bus Device Interfaces (TL-UL):
tl
- Bus Host Interfaces (TL-UL): none
- Peripheral Pins for Chip IO: none
- Interrupts: none
| Port Name | Package::Struct | Type | Act | Width | Description |
|---|
| por_n | logic | uni | rcv | 2 | Root power on reset signals from ast. There is one root reset signal for each core power domain. |
| pwr | pwr_rst | req_rsp | rsp | 1 | Reset request signals from power manager. Power manager can request for specific domains of the lc/sys reset tree to assert. |
| resets | rstmgr_pkg::rstmgr_out | uni | req | 1 | Leaf resets fed to the system. |
| rst_en | rstmgr_pkg::rstmgr_rst_en | uni | req | 1 | Low-power-group outputs used by alert handler. |
| alert_dump | alert_pkg::alert_crashdump | uni | rcv | 1 | Alert handler crash dump information. |
| cpu_dump | rv_core_ibex_pkg::cpu_crash_dump | uni | rcv | 1 | Main processing element crash dump information. |
| sw_rst_req | prim_mubi_pkg::mubi4 | uni | req | 1 | Software requested system reset to pwrmgr. |
| tl | tlul_pkg::tl | req_rsp | rsp | 1 | |
| Alert Name | Description |
|---|
| fatal_fault | This fatal alert is triggered when a fatal structural fault is detected. Structural faults include errors such as sparse fsm errors and tlul integrity errors. |
| fatal_cnsty_fault | This fatal alert is triggered when a reset consistency fault is detected. It is separated from the category above for clearer error collection and debug. |
| Countermeasure ID | Description |
|---|
| RSTMGR.BUS.INTEGRITY | End-to-end bus integrity scheme. |
| RSTMGR.SCAN.INTERSIG.MUBI | scan control signals are multibit |
| RSTMGR.LEAF.RST.BKGN_CHK | Background consistency checks for each leaf reset. |
| RSTMGR.LEAF.RST.SHADOW | Leaf resets to blocks containing shadow registers are shadowed |
| RSTMGR.LEAF.FSM.SPARSE | Sparsely encoded fsm for each leaf rst check. The Hamming delta is only 3 as there are a significant number of leaf resets |
| RSTMGR.SW_RST.CONFIG.REGWEN | Software reset controls are protected by regwen |
| RSTMGR.DUMP_CTRL.CONFIG.REGWEN | Crash dump controls are protected by regwen |