--- linux-2.6.22.14/arch/mips/Kconfig	2008-01-22 14:00:34.000000000 +0200
+++ linux/arch/mips/Kconfig	2008-01-15 11:01:19.000000000 +0200
@@ -656,6 +656,19 @@ config TOSHIBA_RBTX4938
 	  This Toshiba board is based on the TX4938 processor. Say Y here to
 	  support this machine type
 
+config MIPS_MIKROTIK
+	bool "Support for Mikrotik RB boards"
+	select DMA_NONCOHERENT
+	select HW_HAS_PCI
+	select IRQ_CPU
+	select SYS_HAS_CPU_MIPS32_R1
+	select SYS_SUPPORTS_LITTLE_ENDIAN
+	select SYS_SUPPORTS_BIG_ENDIAN
+	select SYS_SUPPORTS_32BIT_KERNEL
+	select ZONE_DMA
+	help
+	  Say Y here to support all Mikrotik mips based routerboards
+
 endchoice
 
 source "arch/mips/au1000/Kconfig"
@@ -911,7 +924,7 @@ config BOOT_ELF32
 
 config MIPS_L1_CACHE_SHIFT
 	int
-	default "4" if MACH_DECSTATION || SNI_RM
+	default "4" if MACH_DECSTATION || SNI_RM || MIPS_MIKROTIK
 	default "7" if SGI_IP27
 	default "5"
 
@@ -948,7 +961,7 @@ config CPU_MIPS32_R1
 	bool "MIPS32 Release 1"
 	depends on SYS_HAS_CPU_MIPS32_R1
 	select CPU_HAS_LLSC
-	select CPU_HAS_PREFETCH
+#	select CPU_HAS_PREFETCH
 	select CPU_SUPPORTS_32BIT_KERNEL
 	select CPU_SUPPORTS_HIGHMEM
 	help