Commit 10f0d07c authored by Daniel Hellstrom's avatar Daniel Hellstrom Committed by David S. Miller
Browse files

sparc32, leon: bugfix in LEON SMP interrupt init

During converting per-cpu ticker to genirq layer some
IRQ initialization code was removed by commit
2cf95304

 ("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: default avatarJan Andersson <jan@gaisler.com>
Signed-off-by: default avatarDaniel Hellstrom <daniel@gaisler.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a7d82a0a
......@@ -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 |
......
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