1 files changed, 66 insertions, 2 deletions

diff --git a/include/asm-x86/gart.h b/include/asm-x86/gart.h
index 90958ed993fa..417f76ea677b 100644
--- a/include/asm-x86/gart.h
+++ b/include/asm-x86/gart.h
@@ -1,16 +1,20 @@
 #ifndef _ASM_X8664_IOMMU_H
 #define _ASM_X8664_IOMMU_H 1
 
+#include <asm/e820.h>
+
 extern void pci_iommu_shutdown(void);
 extern void no_iommu_init(void);
 extern int force_iommu, no_iommu;
 extern int iommu_detected;
+extern int agp_amd64_init(void);
 #ifdef CONFIG_GART_IOMMU
 extern void gart_iommu_init(void);
 extern void gart_iommu_shutdown(void);
 extern void __init gart_parse_options(char *);
 extern void early_gart_iommu_check(void);
 extern void gart_iommu_hole_init(void);
+extern void set_up_gart_resume(u32, u32);
 extern int fallback_aper_order;
 extern int fallback_aper_force;
 extern int gart_iommu_aperture;
@@ -18,8 +22,9 @@ extern int gart_iommu_aperture_allowed;
 extern int gart_iommu_aperture_disabled;
 extern int fix_aperture;
 #else
-#define gart_iommu_aperture 0
-#define gart_iommu_aperture_allowed 0
+#define gart_iommu_aperture             0
+#define gart_iommu_aperture_allowed     0
+#define gart_iommu_aperture_disabled    1
 
 static inline void early_gart_iommu_check(void)
 {
@@ -31,4 +36,63 @@ static inline void gart_iommu_shutdown(void)
 
 #endif
 
+/* PTE bits. */
+#define GPTE_VALID      1
+#define GPTE_COHERENT   2
+
+/* Aperture control register bits. */
+#define GARTEN          (1<<0)
+#define DISGARTCPU      (1<<4)
+#define DISGARTIO       (1<<5)
+
+/* GART cache control register bits. */
+#define INVGART         (1<<0)
+#define GARTPTEERR      (1<<1)
+
+/* K8 On-cpu GART registers */
+#define AMD64_GARTAPERTURECTL   0x90
+#define AMD64_GARTAPERTUREBASE  0x94
+#define AMD64_GARTTABLEBASE     0x98
+#define AMD64_GARTCACHECTL      0x9c
+#define AMD64_GARTEN            (1<<0)
+
+static inline void enable_gart_translation(struct pci_dev *dev, u64 addr)
+{
+        u32 tmp, ctl;
+
+        /* address of the mappings table */
+        addr >>= 12;
+        tmp = (u32) addr<<4;
+        tmp &= ~0xf;
+        pci_write_config_dword(dev, AMD64_GARTTABLEBASE, tmp);
+
+        /* Enable GART translation for this hammer. */
+        pci_read_config_dword(dev, AMD64_GARTAPERTURECTL, &ctl);
+        ctl |= GARTEN;
+        ctl &= ~(DISGARTCPU | DISGARTIO);
+        pci_write_config_dword(dev, AMD64_GARTAPERTURECTL, ctl);
+}
+
+static inline int aperture_valid(u64 aper_base, u32 aper_size, u32 min_size)
+{
+        if (!aper_base)
+                return 0;
+
+        if (aper_base + aper_size > 0x100000000ULL) {
+                printk(KERN_ERR "Aperture beyond 4GB. Ignoring.\n");
+                return 0;
+        }
+        if (e820_any_mapped(aper_base, aper_base + aper_size, E820_RAM)) {
+                printk(KERN_ERR "Aperture pointing to e820 RAM. Ignoring.\n");
+                return 0;
+        }
+        if (aper_size < min_size) {
+                printk(KERN_ERR "Aperture too small (%d MB) than (%d MB)\n",
+                                 aper_size>>20, min_size>>20);
+                return 0;
+        }
+
+        return 1;
+}
+
 #endif