diff options
Diffstat (limited to 'arch/powerpc/kernel/dbell.c')
| -rw-r--r-- | arch/powerpc/kernel/dbell.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/dbell.c b/arch/powerpc/kernel/dbell.c index 1493734..e3a7177 100644 --- a/arch/powerpc/kernel/dbell.c +++ b/arch/powerpc/kernel/dbell.c @@ -41,4 +41,24 @@ void smp_dbell_message_pass(int target, int msg) ppc_msgsnd(PPC_DBELL, PPC_DBELL_MSG_BRDCAST, 0); } } -#endif + +void doorbell_exception(struct pt_regs *regs) +{ + int cpu = smp_processor_id(); + int msg; + + if (num_online_cpus() < 2) + return; + + for (msg = 0; msg < 4; msg++) + if (test_and_clear_bit(msg, &dbell_smp_message[cpu])) + smp_message_recv(msg); +} + +#else /* CONFIG_SMP */ +void doorbell_exception(struct pt_regs *regs) +{ + printk(KERN_WARNING "Received doorbell on non-smp system\n"); +} +#endif /* CONFIG_SMP */ + |