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-rw-r--r--include/asm-x86/gart.h68
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