MIPS: BMIPS: add a smp ops registration helper

Add a helper similar to the generic register_XXX_smp_ops() for bmips.
Register SMP UP ops in case of BMIPS32/3300.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/6248/

arch/mips/Kconfig

@@ -1479,6 +1479,7 @@ config CPU_LOONGSON1
 	select CPU_SUPPORTS_HIGHMEM
 
 config CPU_BMIPS32_3300
+	select SMP_UP if SMP
 	bool
 
 config CPU_BMIPS4350

arch/mips/bcm63xx/prom.c

@@ -61,7 +61,7 @@ void __init prom_init(void)
 
 	if (IS_ENABLED(CONFIG_CPU_BMIPS4350) && IS_ENABLED(CONFIG_SMP)) {
 		/* set up SMP */
-		register_smp_ops(&bmips43xx_smp_ops);
+		register_bmips_smp_ops();
 
 		/*
 		 * BCM6328 might not have its second CPU enabled, while BCM3368

arch/mips/include/asm/bmips.h

@@ -46,9 +46,35 @@
 
 #include <linux/cpumask.h>
 #include <asm/r4kcache.h>
+#include <asm/smp-ops.h>
 
 extern struct plat_smp_ops bmips43xx_smp_ops;
 extern struct plat_smp_ops bmips5000_smp_ops;
+
+static inline int register_bmips_smp_ops(void)
+{
+#if IS_ENABLED(CONFIG_CPU_BMIPS) && IS_ENABLED(CONFIG_SMP)
+	switch (current_cpu_type()) {
+	case CPU_BMIPS32:
+	case CPU_BMIPS3300:
+		return register_up_smp_ops();
+	case CPU_BMIPS4350:
+	case CPU_BMIPS4380:
+		register_smp_ops(&bmips43xx_smp_ops);
+		break;
+	case CPU_BMIPS5000:
+		register_smp_ops(&bmips5000_smp_ops);
+		break;
+	default:
+		return -ENODEV;
+	}
+
+	return 0;
+#else
+	return -ENODEV;
+#endif
+}
+
 extern char bmips_reset_nmi_vec;
 extern char bmips_reset_nmi_vec_end;
 extern char bmips_smp_movevec;