powerpc: Move smp_mpic_message_pass into mpic.c

Having it here rather than in arch/ppc64/kernel/smp.c means that
we can use it on 32-bit SMP systems easily with ARCH=powerpc.

Signed-off-by: Paul Mackerras <[e-mail]>

arch/powerpc/sysdev/mpic.c

···
 
 	printk("IPIs requested... \n");
 }
+
+void smp_mpic_message_pass(int target, int msg)
+{
+	/* make sure we're sending something that translates to an IPI */
+	if ((unsigned int)msg > 3) {
+		printk("SMP %d: smp_message_pass: unknown msg %d\n",
+		       smp_processor_id(), msg);
+		return;
+	}
+	switch (target) {
+	case MSG_ALL:
+		mpic_send_ipi(msg, 0xffffffff);
+		break;
+	case MSG_ALL_BUT_SELF:
+		mpic_send_ipi(msg, 0xffffffff & ~(1 << smp_processor_id()));
+		break;
+	default:
+		mpic_send_ipi(msg, 1 << target);
+		break;
+	}
+}
 #endif /* CONFIG_SMP */

arch/ppc64/kernel/smp.c

···
 int smt_enabled_at_boot = 1;
 
 #ifdef CONFIG_MPIC
-void smp_mpic_message_pass(int target, int msg)
-{
-	/* make sure we're sending something that translates to an IPI */
-	if ( msg > 0x3 ){
-		printk("SMP %d: smp_message_pass: unknown msg %d\n",
-		       smp_processor_id(), msg);
-		return;
-	}
-	switch ( target )
-	{
-	case MSG_ALL:
-		mpic_send_ipi(msg, 0xffffffff);
-		break;
-	case MSG_ALL_BUT_SELF:
-		mpic_send_ipi(msg, 0xffffffff & ~(1 << smp_processor_id()));
-		break;
-	default:
-		mpic_send_ipi(msg, 1 << target);
-		break;
-	}
-}
-
 int __init smp_mpic_probe(void)
 {
 	int nr_cpus;

include/asm-powerpc/mpic.h

···
 /* Send an IPI (non offseted number 0..3) */
 extern void mpic_send_ipi(unsigned int ipi_no, unsigned int cpu_mask);
 
+/* Send a message (IPI) to a given target (cpu number or MSG_*) */
+void smp_mpic_message_pass(int target, int msg);
+
 /* Fetch interrupt from a given mpic */
 extern int mpic_get_one_irq(struct mpic *mpic, struct pt_regs *regs);
 /* This one gets to the primary mpic */

include/asm-ppc64/smp.h

···
 
 extern int smp_mpic_probe(void);
 extern void smp_mpic_setup_cpu(int cpu);
-extern void smp_mpic_message_pass(int target, int msg);
 extern void smp_generic_kick_cpu(int nr);
 
 extern void smp_generic_give_timebase(void);