diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index f4c95aec5acb..882328efc3db 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -134,6 +134,8 @@ static void __iomem *__ioremap(unsigned long phys_addr, unsigned long size,
 			return NULL;
 	}
 
+	WARN_ON_ONCE(page_is_ram(pfn));
+
 	switch (mode) {
 	case IOR_MODE_UNCACHED:
 	default:
diff --git a/drivers/char/agp/amd-k7-agp.c b/drivers/char/agp/amd-k7-agp.c
index 87be46406daf..d28669992147 100644
--- a/drivers/char/agp/amd-k7-agp.c
+++ b/drivers/char/agp/amd-k7-agp.c
@@ -41,6 +41,7 @@ static int amd_create_page_map(struct amd_page_map *page_map)
 	if (page_map->real == NULL)
 		return -ENOMEM;
 
+#ifndef CONFIG_X86
 	SetPageReserved(virt_to_page(page_map->real));
 	global_cache_flush();
 	page_map->remapped = ioremap_nocache(virt_to_gart(page_map->real),
@@ -52,6 +53,10 @@ static int amd_create_page_map(struct amd_page_map *page_map)
 		return -ENOMEM;
 	}
 	global_cache_flush();
+#else
+	set_memory_uc((unsigned long)page_map->real, 1);
+	page_map->remapped = page_map->real;
+#endif
 
 	for (i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++) {
 		writel(agp_bridge->scratch_page, page_map->remapped+i);
@@ -63,8 +68,12 @@ static int amd_create_page_map(struct amd_page_map *page_map)
 
 static void amd_free_page_map(struct amd_page_map *page_map)
 {
+#ifndef CONFIG_X86
 	iounmap(page_map->remapped);
 	ClearPageReserved(virt_to_page(page_map->real));
+#else
+	set_memory_wb((unsigned long)page_map->real, 1);
+#endif
 	free_page((unsigned long) page_map->real);
 }
 
diff --git a/drivers/char/agp/ati-agp.c b/drivers/char/agp/ati-agp.c
index 2d46b713c8f2..55c97f623242 100644
--- a/drivers/char/agp/ati-agp.c
+++ b/drivers/char/agp/ati-agp.c
@@ -60,18 +60,9 @@ static int ati_create_page_map(struct ati_page_map *page_map)
 	if (page_map->real == NULL)
 		return -ENOMEM;
 
-	SetPageReserved(virt_to_page(page_map->real));
+	set_memory_uc((unsigned long)page_map->real, 1);
 	err = map_page_into_agp(virt_to_page(page_map->real));
-	page_map->remapped = ioremap_nocache(virt_to_gart(page_map->real),
-					    PAGE_SIZE);
-	if (page_map->remapped == NULL || err) {
-		ClearPageReserved(virt_to_page(page_map->real));
-		free_page((unsigned long) page_map->real);
-		page_map->real = NULL;
-		return -ENOMEM;
-	}
-	/*CACHE_FLUSH();*/
-	global_cache_flush();
+	page_map->remapped = page_map->real;
 
 	for (i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++) {
 		writel(agp_bridge->scratch_page, page_map->remapped+i);
@@ -85,8 +76,7 @@ static int ati_create_page_map(struct ati_page_map *page_map)
 static void ati_free_page_map(struct ati_page_map *page_map)
 {
 	unmap_page_from_agp(virt_to_page(page_map->real));
-	iounmap(page_map->remapped);
-	ClearPageReserved(virt_to_page(page_map->real));
+	set_memory_wb((unsigned long)page_map->real, 1);
 	free_page((unsigned long) page_map->real);
 }
 
diff --git a/drivers/char/agp/generic.c b/drivers/char/agp/generic.c
index 7484bc759c4c..7fc0c99a3a58 100644
--- a/drivers/char/agp/generic.c
+++ b/drivers/char/agp/generic.c
@@ -932,9 +932,14 @@ int agp_generic_create_gatt_table(struct agp_bridge_data *bridge)
 	agp_gatt_table = (void *)table;
 
 	bridge->driver->cache_flush();
+#ifdef CONFIG_X86
+	set_memory_uc((unsigned long)table, 1 << page_order);
+	bridge->gatt_table = (void *)table;
+#else
 	bridge->gatt_table = ioremap_nocache(virt_to_gart(table),
 					(PAGE_SIZE * (1 << page_order)));
 	bridge->driver->cache_flush();
+#endif
 
 	if (bridge->gatt_table == NULL) {
 		for (page = virt_to_page(table); page <= virt_to_page(table_end); page++)
@@ -991,7 +996,11 @@ int agp_generic_free_gatt_table(struct agp_bridge_data *bridge)
 	 * called, then all agp memory is deallocated and removed
 	 * from the table. */
 
+#ifdef CONFIG_X86
+	set_memory_wb((unsigned long)bridge->gatt_table, 1 << page_order);
+#else
 	iounmap(bridge->gatt_table);
+#endif
 	table = (char *) bridge->gatt_table_real;
 	table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1);
 
diff --git a/drivers/char/agp/sis-agp.c b/drivers/char/agp/sis-agp.c
index eb1a1c738190..b6791846809f 100644
--- a/drivers/char/agp/sis-agp.c
+++ b/drivers/char/agp/sis-agp.c
@@ -14,6 +14,9 @@
 #define SIS_TLBCNTRL	0x97
 #define SIS_TLBFLUSH	0x98
 
+#define PCI_DEVICE_ID_SI_662	0x0662
+#define PCI_DEVICE_ID_SI_671	0x0671
+
 static int __devinitdata agp_sis_force_delay = 0;
 static int __devinitdata agp_sis_agp_spec = -1;
 
@@ -27,8 +30,8 @@ static int sis_fetch_size(void)
 	values = A_SIZE_8(agp_bridge->driver->aperture_sizes);
 	for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
 		if ((temp_size == values[i].size_value) ||
-		    ((temp_size & ~(0x03)) ==
-		     (values[i].size_value & ~(0x03)))) {
+		    ((temp_size & ~(0x07)) ==
+		     (values[i].size_value & ~(0x07)))) {
 			agp_bridge->previous_size =
 			    agp_bridge->current_size = (void *) (values + i);
 
@@ -214,6 +217,26 @@ static void __devexit agp_sis_remove(struct pci_dev *pdev)
 	agp_put_bridge(bridge);
 }
 
+#ifdef CONFIG_PM
+
+static int agp_sis_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+	pci_save_state(pdev);
+	pci_set_power_state(pdev, pci_choose_state(pdev, state));
+
+	return 0;
+}
+
+static int agp_sis_resume(struct pci_dev *pdev)
+{
+	pci_set_power_state(pdev, PCI_D0);
+	pci_restore_state(pdev);
+
+	return sis_driver.configure();
+}
+
+#endif /* CONFIG_PM */
+
 static struct pci_device_id agp_sis_pci_table[] = {
 	{
 		.class		= (PCI_CLASS_BRIDGE_HOST << 8),
@@ -327,6 +350,22 @@ static struct pci_device_id agp_sis_pci_table[] = {
 		.subvendor	= PCI_ANY_ID,
 		.subdevice	= PCI_ANY_ID,
 	},
+	{
+		.class		= (PCI_CLASS_BRIDGE_HOST << 8),
+		.class_mask	= ~0,
+		.vendor		= PCI_VENDOR_ID_SI,
+		.device		= PCI_DEVICE_ID_SI_662,
+		.subvendor	= PCI_ANY_ID,
+		.subdevice	= PCI_ANY_ID,
+	},
+	{
+		.class		= (PCI_CLASS_BRIDGE_HOST << 8),
+		.class_mask	= ~0,
+		.vendor		= PCI_VENDOR_ID_SI,
+		.device		= PCI_DEVICE_ID_SI_671,
+		.subvendor	= PCI_ANY_ID,
+		.subdevice	= PCI_ANY_ID,
+	},
 	{
 		.class		= (PCI_CLASS_BRIDGE_HOST << 8),
 		.class_mask	= ~0,
@@ -393,6 +432,10 @@ static struct pci_driver agp_sis_pci_driver = {
 	.id_table	= agp_sis_pci_table,
 	.probe		= agp_sis_probe,
 	.remove		= agp_sis_remove,
+#ifdef CONFIG_PM
+	.suspend	= agp_sis_suspend,
+	.resume		= agp_sis_resume,
+#endif
 };
 
 static int __init agp_sis_init(void)
diff --git a/drivers/char/agp/sworks-agp.c b/drivers/char/agp/sworks-agp.c
index 551ef25063ef..e08934e58f32 100644
--- a/drivers/char/agp/sworks-agp.c
+++ b/drivers/char/agp/sworks-agp.c
@@ -52,28 +52,20 @@ static int serverworks_create_page_map(struct serverworks_page_map *page_map)
 	if (page_map->real == NULL) {
 		return -ENOMEM;
 	}
-	SetPageReserved(virt_to_page(page_map->real));
-	global_cache_flush();
-	page_map->remapped = ioremap_nocache(virt_to_gart(page_map->real),
-					    PAGE_SIZE);
-	if (page_map->remapped == NULL) {
-		ClearPageReserved(virt_to_page(page_map->real));
-		free_page((unsigned long) page_map->real);
-		page_map->real = NULL;
-		return -ENOMEM;
-	}
-	global_cache_flush();
+
+	set_memory_uc((unsigned long)page_map->real, 1);
+	page_map->remapped = page_map->real;
 
 	for (i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++)
 		writel(agp_bridge->scratch_page, page_map->remapped+i);
+		/* Red Pen: Everyone else does pci posting flush here */
 
 	return 0;
 }
 
 static void serverworks_free_page_map(struct serverworks_page_map *page_map)
 {
-	iounmap(page_map->remapped);
-	ClearPageReserved(virt_to_page(page_map->real));
+	set_memory_wb((unsigned long)page_map->real, 1);
 	free_page((unsigned long) page_map->real);
 }