diff options
| author | Varun Wadekar <vwadekar@nvidia.com> | 2018-01-26 10:33:42 -0800 |
|---|---|---|
| committer | Varun Wadekar <vwadekar@nvidia.com> | 2019-01-31 08:46:41 -0800 |
| commit | d16b045c5648ace7573ced3c58b61ab1e54244fd (patch) | |
| tree | 16515f021239b043b03fe7119db89d0ac2a73644 /plat/nvidia | |
| parent | 2ed09b1ee2a3c9d6e19f067e0bdf5af1d4f59114 (diff) | |
Tegra: fiq_glue: support to handle LEGACY_FIQ PPIs for Tegra SoCs
This patch adds support to handle secure PPIs for Tegra watchdog timers. This
functionality is currently protected by the ENABLE_WDT_LEGACY_FIQ_HANDLING
configuration variable and is only enabled for Tegra210 platforms, for now.
Change-Id: I0752ef54a986c58305e1bc8ad9be71d4a8bbd394
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
Diffstat (limited to 'plat/nvidia')
| -rw-r--r-- | plat/nvidia/tegra/common/tegra_fiq_glue.c | 20 | ||||
| -rw-r--r-- | plat/nvidia/tegra/soc/t210/platform_t210.mk | 3 |
2 files changed, 23 insertions, 0 deletions
diff --git a/plat/nvidia/tegra/common/tegra_fiq_glue.c b/plat/nvidia/tegra/common/tegra_fiq_glue.c index b0366904..60b55955 100644 --- a/plat/nvidia/tegra/common/tegra_fiq_glue.c +++ b/plat/nvidia/tegra/common/tegra_fiq_glue.c @@ -16,9 +16,15 @@ #include <lib/el3_runtime/context_mgmt.h> #include <plat/common/platform.h> +#if ENABLE_WDT_LEGACY_FIQ_HANDLING +#include <flowctrl.h> +#endif #include <tegra_def.h> #include <tegra_private.h> +/* Legacy FIQ used by earlier Tegra platforms */ +#define LEGACY_FIQ_PPI_WDT 28U + static DEFINE_BAKERY_LOCK(tegra_fiq_lock); /******************************************************************************* @@ -79,6 +85,20 @@ static uint64_t tegra_fiq_interrupt_handler(uint32_t id, cm_set_elr_el3(NON_SECURE, ns_fiq_handler_addr); } +#if ENABLE_WDT_LEGACY_FIQ_HANDLING + /* + * Tegra platforms that use LEGACY_FIQ as the watchdog timer FIQ + * need to issue an IPI to other CPUs, to allow them to handle + * the "system hung" scenario. This interrupt is passed to the GICD + * via the Flow Controller. So, once we receive this interrupt, + * disable the routing so that we can mark it as "complete" in the + * GIC later. + */ + if (irq == LEGACY_FIQ_PPI_WDT) { + tegra_fc_disable_fiq_to_ccplex_routing(); + } +#endif + /* * Mark this interrupt as complete to avoid a FIQ storm. */ diff --git a/plat/nvidia/tegra/soc/t210/platform_t210.mk b/plat/nvidia/tegra/soc/t210/platform_t210.mk index e23d7e36..59077eb8 100644 --- a/plat/nvidia/tegra/soc/t210/platform_t210.mk +++ b/plat/nvidia/tegra/soc/t210/platform_t210.mk @@ -22,6 +22,9 @@ $(eval $(call add_define,MAX_XLAT_TABLES)) MAX_MMAP_REGIONS := 15 $(eval $(call add_define,MAX_MMAP_REGIONS)) +ENABLE_WDT_LEGACY_FIQ_HANDLING := 1 +$(eval $(call add_define,ENABLE_WDT_LEGACY_FIQ_HANDLING)) + PLAT_INCLUDES += -I${SOC_DIR}/drivers/se BL31_SOURCES += drivers/ti/uart/aarch64/16550_console.S \ |