rockchip: Implement a panic handler that will reboot the system

The current Rockchip platform code retains the "common" default panic
handler which simply hangs the system (until the watchdog kicks in, if
enabled). This is usually not a great user experience.

This patch implements a Rockchip-specific panic handler that calls the
platform's reboot implementation to reset the system.

Change-Id: I4cbe09c48f1b3f86ebdfc0108c186565f9ffc119
Signed-off-by: Julius Werner <jwerner@chromium.org>

diff --git a/plat/rockchip/common/aarch64/plat_helpers.S b/plat/rockchip/common/aarch64/plat_helpers.S
index abfb5a7951d95ce8a9cb5195a8aff104bd7899ef..24cb8e45afd4b490aefe9157a4d7eef7b49c67d5 100644 (file)
--- a/plat/rockchip/common/aarch64/plat_helpers.S
+++ b/plat/rockchip/common/aarch64/plat_helpers.S
@@ -23,6 +23,7 @@
        .globl  plat_crash_console_putc
        .globl  plat_my_core_pos
        .globl  plat_reset_handler
+       .globl  plat_panic_handler
 
        /*
         * void plat_reset_handler(void);
@@ -107,6 +108,19 @@ func plat_crash_console_putc
        b       console_core_putc
 endfunc plat_crash_console_putc
 
+       /* --------------------------------------------------------------------
+        * void plat_panic_handler(void)
+        * Call system reset function on panic. Set up an emergency stack so we
+        * can run C functions (it only needs to last for a few calls until we
+        * reboot anyway).
+        * --------------------------------------------------------------------
+        */
+func plat_panic_handler
+       msr     spsel, #0
+       bl      plat_set_my_stack
+       b       rockchip_soc_soft_reset
+endfunc plat_panic_handler
+
        /* --------------------------------------------------------------------
         * void platform_cpu_warmboot (void);
         * cpus online or resume enterpoint