Merge git://git.denx.de/u-boot-fsl-qoriq

[u-boot] / arch / arm / cpu / armv8 / fsl-layerscape / mp.c

diff --git a/arch/arm/cpu/armv8/fsl-layerscape/mp.c b/arch/arm/cpu/armv8/fsl-layerscape/mp.c
index 0d600db09054570213623c1692248aa4d6df448b..df7ffb88f6a6ae2572040ea53ca1728a18980da8 100644 (file)
--- a/arch/arm/cpu/armv8/fsl-layerscape/mp.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/mp.c
@@ -192,6 +192,12 @@ int cpu_release(int nr, int argc, char * const argv[])
                           (unsigned long)table + SPIN_TABLE_ELEM_SIZE);
        asm volatile("dsb st");
        smp_kick_all_cpus();    /* only those with entry addr set will run */
+       /*
+        * When the first release command runs, all cores are set to go. Those
+        * without a valid entry address will be trapped by "wfe". "sev" kicks
+        * them off to check the address again. When set, they continue to run.
+        */
+       asm volatile("sev");
 
        return 0;
 }