feat(tc): allow secure watchdog timer to trigger periodically
This patch does the following:
1. Configures SBSA secure watchdog timer as Group0 interrupt for
TC platform while keeping it as Group1 secure interrupt for
other CSS based SoCs.
2. Programs the watchdog timer to trigger periodically
3. Provides a Group0 interrupt handler for TC platform port to
deactivate the EL3 interrupt due to expiry of secure watchdog
timer and refresh it explicitly.
Change-Id: I3847d6eb7347c6ea0e527b97b096119ca1e6701b
Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
diff --git a/plat/arm/board/tc/tc_bl31_setup.c b/plat/arm/board/tc/tc_bl31_setup.c
index 8ad1d30..630324f 100644
--- a/plat/arm/board/tc/tc_bl31_setup.c
+++ b/plat/arm/board/tc/tc_bl31_setup.c
@@ -13,6 +13,7 @@
#include <common/debug.h>
#include <drivers/arm/css/css_mhu_doorbell.h>
#include <drivers/arm/css/scmi.h>
+#include <drivers/arm/sbsa.h>
#include <lib/fconf/fconf.h>
#include <lib/fconf/fconf_dyn_cfg_getter.h>
#include <plat/arm/common/plat_arm.h>
@@ -81,3 +82,37 @@
fconf_populate("HW_CONFIG", hw_config_info->config_addr);
}
+
+#if defined(SPD_spmd) && (SPMD_SPM_AT_SEL2 == 1)
+void tc_bl31_plat_runtime_setup(void)
+{
+ arm_bl31_plat_runtime_setup();
+
+ /* Start secure watchdog timer. */
+ plat_arm_secure_wdt_start();
+}
+
+void bl31_plat_runtime_setup(void)
+{
+ tc_bl31_plat_runtime_setup();
+}
+
+/*
+ * Platform handler for Group0 secure interrupt.
+ */
+int plat_spmd_handle_group0_interrupt(uint32_t intid)
+{
+ /* Trusted Watchdog timer is the only source of Group0 interrupt now. */
+ if (intid == SBSA_SECURE_WDOG_INTID) {
+ INFO("Watchdog restarted\n");
+ /* Refresh the timer. */
+ plat_arm_secure_wdt_refresh();
+
+ /* Deactivate the corresponding interrupt. */
+ plat_ic_end_of_interrupt(intid);
+ return 0;
+ }
+
+ return -1;
+}
+#endif /*defined(SPD_spmd) && (SPMD_SPM_AT_SEL2 == 1)*/