[dif,pwrmgr,rstmgr] Add Darjeeling pwrmgr/rstmgr changes

Adds conditional compilation for Darjeeling to match the changed
register definitions, including a change in the number of wakeup reasons
for the rstmgr.

Ideally this can be better modularised through some devicetable
extension API in the future for these blocks, but for now we introduce
`ifdef`s to the DIFs to enable this functionality.

Signed-off-by: Alex Jones <[email protected]>

Author: AlexJones0

sw/device/lib/dif/dif_pwrmgr.c

@@ -66,6 +66,7 @@ static const bitfield_field32_t kDomainConfigBitfield = {
  * Relevant bits of the WAKEUP_EN and WAKE_INFO registers must start at `0` and
  * be in the same order as `dif_pwrmgr_wakeup_request_source_t` constants.
  */
+#if defined(OPENTITAN_IS_EARLGREY)
 static_assert(kDifPwrmgrWakeupRequestSourceOne ==
                   (1u << PWRMGR_WAKEUP_EN_EN_0_BIT),
               "Layout of WAKEUP_EN register changed.");
@@ -87,6 +88,22 @@ static_assert(kDifPwrmgrWakeupRequestSourceFive ==
 static_assert(kDifPwrmgrWakeupRequestSourceSix ==
                   (1u << PWRMGR_PARAM_SENSOR_CTRL_AON_WKUP_REQ_IDX),
               "Layout of WAKE_INFO register changed.");
+#elif defined(OPENTITAN_IS_DARJEELING)
+static_assert(kDifPwrmgrWakeupRequestSourceOne ==
+                  (1u << PWRMGR_PARAM_PINMUX_AON_PIN_WKUP_REQ_IDX),
+              "Layout of WAKE_INFO register changed.");
+static_assert(kDifPwrmgrWakeupRequestSourceTwo ==
+                  (1u << PWRMGR_PARAM_AON_TIMER_AON_WKUP_REQ_IDX),
+              "Layout of WAKE_INFO register changed.");
+static_assert(kDifPwrmgrWakeupRequestSourceThree ==
+                  (1u << PWRMGR_PARAM_SOC_PROXY_WKUP_INTERNAL_REQ_IDX),
+              "Layout of WAKE_INFO register changed.");
+static_assert(kDifPwrmgrWakeupRequestSourceFour ==
+                  (1u << PWRMGR_PARAM_SOC_PROXY_WKUP_EXTERNAL_REQ_IDX),
+              "Layout of WAKE_INFO register changed.");
+#else
+#error "dif_pwrmgr does not support this top"
+#endif
 
 /**
  * Relevant bits of the RESET_EN register must start at `0` and be in the same
@@ -135,9 +152,15 @@ static const request_reg_info_t request_reg_infos[2] = {
                     .mask = kDifPwrmgrWakeupRequestSourceOne |
                             kDifPwrmgrWakeupRequestSourceTwo |
                             kDifPwrmgrWakeupRequestSourceThree |
+#if defined(OPENTITAN_IS_EARLGREY)
                             kDifPwrmgrWakeupRequestSourceFour |
                             kDifPwrmgrWakeupRequestSourceFive |
                             kDifPwrmgrWakeupRequestSourceSix,
+#elif defined(OPENTITAN_IS_DARJEELING)
+                            kDifPwrmgrWakeupRequestSourceFour,
+#else
+#error "dif_pwrmgr does not support this top"
+#endif
                     .index = 0,
                 },
         },

sw/device/lib/dif/dif_pwrmgr.h

@@ -93,8 +93,14 @@ typedef enum dif_pwrmgr_wakeup_request_source {
   kDifPwrmgrWakeupRequestSourceTwo = (1u << 1),
   kDifPwrmgrWakeupRequestSourceThree = (1u << 2),
   kDifPwrmgrWakeupRequestSourceFour = (1u << 3),
+#if defined(OPENTITAN_IS_EARLGREY)
   kDifPwrmgrWakeupRequestSourceFive = (1u << 4),
   kDifPwrmgrWakeupRequestSourceSix = (1u << 5),
+#elif defined(OPENTITAN_IS_DARJEELING)
+// Darjeeling only has four wakeup request sources
+#else
+#error "dif_pwrmgr does not support this top"
+#endif
 } dif_pwrmgr_wakeup_request_source_t;
 
 /**

sw/device/lib/dif/dif_rstmgr.c

@@ -16,7 +16,7 @@
 #include "rstmgr_regs.h"  // Generated.
 
 // These assertions are only defined for the Earl Grey chip.
-#ifdef OPENTITAN_IS_EARLGREY
+#if defined(OPENTITAN_IS_EARLGREY)
 // This macro simplifies the `static_assert` check to make sure that the
 // public reset info register bitfield matches register bits.
 #define RSTMGR_RESET_INFO_CHECK(pub_name, priv_name)         \
@@ -53,7 +53,11 @@ static_assert(
 static_assert(
     DIF_RSTMGR_ALERT_INFO_MAX_SIZE == RSTMGR_ALERT_INFO_CTRL_INDEX_MASK,
     "Alert info dump max size has grown, please update the public define!");
-#endif  // OPENTITAN_IS_EARLGREY
+#elif defined(OPENTITAN_IS_DARJEELING)
+// TODO: equivalent assertations are not yet defined for Darjeeling
+#else
+#error "dif_rstmgr does not support this top"
+#endif
 
 /**
  * Checks whether alert_info capture is disabled.

sw/device/lib/dif/dif_rstmgr.h

@@ -83,6 +83,7 @@ typedef enum dif_rstmgr_reset_info {
    * escalation, watchdog or anything else.
    */
   kDifRstmgrResetInfoHwReq = (0x1f << 3),
+#if defined(OPENTITAN_IS_EARLGREY)
   /**
    * Device has reset due to the peripheral system reset control request.
    */
@@ -91,6 +92,18 @@ typedef enum dif_rstmgr_reset_info {
    * Device has reset due to watchdog bite.
    */
   kDifRstmgrResetInfoWatchdog = (1 << 4),
+#elif defined(OPENTITAN_IS_DARJEELING)
+  /**
+   * Device has reset due to watchdog bite.
+   */
+  kDifRstmgrResetInfoWatchdog = (1 << 3),
+  /**
+   * Device has reset due to an external reset request via soc_proxy.
+   */
+  kDifRstmgrResetInfoExternalRst = (1 << 4),
+#else
+#error "dif_rstmgr does not support this top"
+#endif
   /**
    * Device has reset due to power unstable.
    */