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authorDaniel Hellstrom <daniel@gaisler.com>2011-06-09 06:54:09 +0400
committerDavid S. Miller <davem@davemloft.net>2011-06-10 03:12:34 +0400
commit10f0d07c51516bd24b040016c6d4304eef05f115 (patch)
tree1351db454e31234e7a5a247a3323a2e6642b5217 /arch
parenta7d82a0a3cd547494294baee7f9764ea44bead73 (diff)
downloadlinux-10f0d07c51516bd24b040016c6d4304eef05f115.tar.xz
sparc32, leon: bugfix in LEON SMP interrupt init
During converting per-cpu ticker to genirq layer some IRQ initialization code was removed by commit 2cf9530420e446bb61f665d02afeb81070106900 ("sparc32,leon: per-cpu ticker use genirq per-cpu handler"). This patch reintroduces the code at the same place it was removed from. IRQ12 - IRQ14 will crash on LEON SMP without this patch because it will run the SUN4M IRQ trap handler. Reported-by: Jan Andersson <jan@gaisler.com> Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch')
-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 |