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| author | Daniel Hellstrom <daniel@gaisler.com> | 2011-06-09 06:54:09 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-06-10 03:12:34 +0400 |
| commit | 10f0d07c51516bd24b040016c6d4304eef05f115 (patch) | |
| tree | 1351db454e31234e7a5a247a3323a2e6642b5217 /arch/sparc/kernel/leon_kernel.c | |
| parent | a7d82a0a3cd547494294baee7f9764ea44bead73 (diff) | |
| download | linux-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/sparc/kernel/leon_kernel.c')
| -rw-r--r-- | arch/sparc/kernel/leon_kernel.c | 16 |
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 | |