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-rw-r--r--arch/sparc/kernel/leon_kernel.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/sparc/kernel/leon_kernel.c b/arch/sparc/kernel/leon_kernel.c
index c23d61e9e52c..d17255a2bbac 100644
--- a/arch/sparc/kernel/leon_kernel.c
+++ b/arch/sparc/kernel/leon_kernel.c
@@ -376,6 +376,22 @@ void __init leon_init_timers(irq_handler_t counter_fn)
prom_halt();
}
+#ifdef CONFIG_SMP
+ {
+ unsigned long flags;
+
+ /*
+ * In SMP, sun4m adds a IPI handler to IRQ trap handler that
+ * LEON never must take, sun4d and LEON overwrites the branch
+ * with a NOP.
+ */
+ local_irq_save(flags);
+ patchme_maybe_smp_msg[0] = 0x01000000; /* NOP out the branch */
+ local_flush_cache_all();
+ local_irq_restore(flags);
+ }
+#endif
+
LEON3_BYPASS_STORE_PA(&leon3_gptimer_regs->e[leon3_gptimer_idx].ctrl,
LEON3_GPTIMER_EN |
LEON3_GPTIMER_RL |