diff --git a/drivers/char/agp/agp.h b/drivers/char/agp/agp.h
index fdbca25..35ab1a9 100644
--- a/drivers/char/agp/agp.h
+++ b/drivers/char/agp/agp.h
@@ -176,7 +176,7 @@
 #define I830_GMCH_MEM_MASK		0x1
 #define I830_GMCH_MEM_64M		0x1
 #define I830_GMCH_MEM_128M		0
-#define I830_GMCH_GMS_MASK		0x70
+#define I830_GMCH_GMS_MASK		0xF0
 #define I830_GMCH_GMS_DISABLED		0x00
 #define I830_GMCH_GMS_LOCAL		0x10
 #define I830_GMCH_GMS_STOLEN_512	0x20
@@ -231,6 +231,10 @@
 #define I965_PGETBL_SIZE_512KB	(0 << 1)
 #define I965_PGETBL_SIZE_256KB	(1 << 1)
 #define I965_PGETBL_SIZE_128KB	(2 << 1)
+#define G33_PGETBL_SIZE_MASK    (3 << 8)
+#define G33_PGETBL_SIZE_1M      (1 << 8)
+#define G33_PGETBL_SIZE_2M      (2 << 8)
+
 #define I810_DRAM_CTL		0x3000
 #define I810_DRAM_ROW_0		0x00000001
 #define I810_DRAM_ROW_0_SDRAM	0x00000001