+#define RS480_NB_MC_INDEX 0x168
+# define RS480_NB_MC_IND_WR_EN (1 << 8)
+#define RS480_NB_MC_DATA 0x16c
+
+#define RS690_MC_INDEX 0x78
+# define RS690_MC_INDEX_MASK 0x1ff
+# define RS690_MC_INDEX_WR_EN (1 << 9)
+# define RS690_MC_INDEX_WR_ACK 0x7f
+#define RS690_MC_DATA 0x7c
+
+/* MC indirect registers */
+#define RS480_MC_MISC_CNTL 0x18
+# define RS480_DISABLE_GTW (1 << 1)
+/* switch between MCIND GART and MM GART registers. 0 = mmgart, 1 = mcind gart */
+# define RS480_GART_INDEX_REG_EN (1 << 12)
+# define RS690_BLOCK_GFX_D3_EN (1 << 14)
+#define RS480_K8_FB_LOCATION 0x1e
+#define RS480_GART_FEATURE_ID 0x2b
+# define RS480_HANG_EN (1 << 11)
+# define RS480_TLB_ENABLE (1 << 18)
+# define RS480_P2P_ENABLE (1 << 19)
+# define RS480_GTW_LAC_EN (1 << 25)
+# define RS480_2LEVEL_GART (0 << 30)
+# define RS480_1LEVEL_GART (1 << 30)
+# define RS480_PDC_EN (1 << 31)
+#define RS480_GART_BASE 0x2c
+#define RS480_GART_CACHE_CNTRL 0x2e
+# define RS480_GART_CACHE_INVALIDATE (1 << 0) /* wait for it to clear */
+#define RS480_AGP_ADDRESS_SPACE_SIZE 0x38
+# define RS480_GART_EN (1 << 0)
+# define RS480_VA_SIZE_32MB (0 << 1)
+# define RS480_VA_SIZE_64MB (1 << 1)
+# define RS480_VA_SIZE_128MB (2 << 1)
+# define RS480_VA_SIZE_256MB (3 << 1)
+# define RS480_VA_SIZE_512MB (4 << 1)
+# define RS480_VA_SIZE_1GB (5 << 1)
+# define RS480_VA_SIZE_2GB (6 << 1)
+#define RS480_AGP_MODE_CNTL 0x39
+# define RS480_POST_GART_Q_SIZE (1 << 18)
+# define RS480_NONGART_SNOOP (1 << 19)
+# define RS480_AGP_RD_BUF_SIZE (1 << 20)
+# define RS480_REQ_TYPE_SNOOP_SHIFT 22
+# define RS480_REQ_TYPE_SNOOP_MASK 0x3
+# define RS480_REQ_TYPE_SNOOP_DIS (1 << 24)
+#define RS480_MC_MISC_UMA_CNTL 0x5f
+#define RS480_MC_MCLK_CNTL 0x7a
+#define RS480_MC_UMA_DUALCH_CNTL 0x86
+
+#define RS690_MC_FB_LOCATION 0x100
+#define RS690_MC_AGP_LOCATION 0x101
+#define RS690_MC_AGP_BASE 0x102
+#define RS690_MC_AGP_BASE_2 0x103