diff --git a/arch/mips/include/asm/cm.h b/arch/mips/include/asm/cm.h
index 0261733..62ecef2 100644
--- a/arch/mips/include/asm/cm.h
+++ b/arch/mips/include/asm/cm.h
@@ -12,8 +12,46 @@
 #define GCR_BASE			0x0008
 #define GCR_BASE_UPPER			0x000c
 #define GCR_REV				0x0030
+#define GCR_L2_CONFIG			0x0130
+#define GCR_L2_TAG_ADDR			0x0600
+#define GCR_L2_TAG_ADDR_UPPER		0x0604
+#define GCR_L2_TAG_STATE		0x0608
+#define GCR_L2_TAG_STATE_UPPER		0x060c
+#define GCR_L2_DATA			0x0610
+#define GCR_L2_DATA_UPPER		0x0614
 
 /* GCR_REV CM versions */
 #define GCR_REV_CM3			0x0800
 
+/* GCR_L2_CONFIG fields */
+#define GCR_L2_CONFIG_ASSOC_SHIFT	0
+#define GCR_L2_CONFIG_ASSOC_BITS	8
+#define GCR_L2_CONFIG_LINESZ_SHIFT	8
+#define GCR_L2_CONFIG_LINESZ_BITS	4
+#define GCR_L2_CONFIG_SETSZ_SHIFT	12
+#define GCR_L2_CONFIG_SETSZ_BITS	4
+#define GCR_L2_CONFIG_BYPASS		(1 << 20)
+
+#ifndef __ASSEMBLY__
+
+#include <asm/io.h>
+
+static inline void *mips_cm_base(void)
+{
+	return (void *)CKSEG1ADDR(CONFIG_MIPS_CM_BASE);
+}
+
+static inline unsigned long mips_cm_l2_line_size(void)
+{
+	unsigned long l2conf, line_sz;
+
+	l2conf = __raw_readl(mips_cm_base() + GCR_L2_CONFIG);
+
+	line_sz = l2conf >> GCR_L2_CONFIG_LINESZ_SHIFT;
+	line_sz &= GENMASK(GCR_L2_CONFIG_LINESZ_BITS - 1, 0);
+	return line_sz ? (2 << line_sz) : 0;
+}
+
+#endif /* !__ASSEMBLY__ */
+
 #endif /* __MIPS_ASM_CM_H__ */