1 #ifndef _ASM_X8664_IOMMU_H
2 #define _ASM_X8664_IOMMU_H 1
6 extern void pci_iommu_shutdown(void);
7 extern void no_iommu_init(void);
8 extern int force_iommu, no_iommu;
9 extern int iommu_detected;
10 extern int agp_amd64_init(void);
11 #ifdef CONFIG_GART_IOMMU
12 extern void gart_iommu_init(void);
13 extern void gart_iommu_shutdown(void);
14 extern void __init gart_parse_options(char *);
15 extern void early_gart_iommu_check(void);
16 extern void gart_iommu_hole_init(void);
17 extern int fallback_aper_order;
18 extern int fallback_aper_force;
19 extern int gart_iommu_aperture;
20 extern int gart_iommu_aperture_allowed;
21 extern int gart_iommu_aperture_disabled;
22 extern int fix_aperture;
24 #define gart_iommu_aperture 0
25 #define gart_iommu_aperture_allowed 0
27 static inline void early_gart_iommu_check(void)
31 static inline void gart_iommu_shutdown(void)
39 #define GPTE_COHERENT 2
41 /* Aperture control register bits. */
43 #define DISGARTCPU (1<<4)
44 #define DISGARTIO (1<<5)
46 /* GART cache control register bits. */
47 #define INVGART (1<<0)
48 #define GARTPTEERR (1<<1)
50 /* K8 On-cpu GART registers */
51 #define AMD64_GARTAPERTURECTL 0x90
52 #define AMD64_GARTAPERTUREBASE 0x94
53 #define AMD64_GARTTABLEBASE 0x98
54 #define AMD64_GARTCACHECTL 0x9c
55 #define AMD64_GARTEN (1<<0)
57 static inline void enable_gart_translation(struct pci_dev *dev, u64 addr)
61 /* address of the mappings table */
65 pci_write_config_dword(dev, AMD64_GARTTABLEBASE, tmp);
67 /* Enable GART translation for this hammer. */
68 pci_read_config_dword(dev, AMD64_GARTAPERTURECTL, &ctl);
70 ctl &= ~(DISGARTCPU | DISGARTIO);
71 pci_write_config_dword(dev, AMD64_GARTAPERTURECTL, ctl);
74 static inline int aperture_valid(u64 aper_base, u32 aper_size, u32 min_size)
79 if (aper_base + aper_size > 0x100000000ULL) {
80 printk(KERN_ERR "Aperture beyond 4GB. Ignoring.\n");
83 if (e820_any_mapped(aper_base, aper_base + aper_size, E820_RAM)) {
84 printk(KERN_ERR "Aperture pointing to e820 RAM. Ignoring.\n");
87 if (aper_size < min_size) {
88 printk(KERN_ERR "Aperture too small (%d MB) than (%d MB)\n",
89 aper_size>>20, min_size>>20);