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1 | #ifndef _ASM_X86_GART_H | |
2 | #define _ASM_X86_GART_H | |
3 | ||
4 | #include <asm/e820.h> | |
5 | ||
6 | extern void set_up_gart_resume(u32, u32); | |
7 | ||
8 | extern int fallback_aper_order; | |
9 | extern int fallback_aper_force; | |
10 | extern int fix_aperture; | |
11 | ||
12 | /* PTE bits. */ | |
13 | #define GPTE_VALID 1 | |
14 | #define GPTE_COHERENT 2 | |
15 | ||
16 | /* Aperture control register bits. */ | |
17 | #define GARTEN (1<<0) | |
18 | #define DISGARTCPU (1<<4) | |
19 | #define DISGARTIO (1<<5) | |
20 | #define DISTLBWALKPRB (1<<6) | |
21 | ||
22 | /* GART cache control register bits. */ | |
23 | #define INVGART (1<<0) | |
24 | #define GARTPTEERR (1<<1) | |
25 | ||
26 | /* K8 On-cpu GART registers */ | |
27 | #define AMD64_GARTAPERTURECTL 0x90 | |
28 | #define AMD64_GARTAPERTUREBASE 0x94 | |
29 | #define AMD64_GARTTABLEBASE 0x98 | |
30 | #define AMD64_GARTCACHECTL 0x9c | |
31 | ||
32 | #ifdef CONFIG_GART_IOMMU | |
33 | extern int gart_iommu_aperture; | |
34 | extern int gart_iommu_aperture_allowed; | |
35 | extern int gart_iommu_aperture_disabled; | |
36 | ||
37 | extern void early_gart_iommu_check(void); | |
38 | extern int gart_iommu_init(void); | |
39 | extern void __init gart_parse_options(char *); | |
40 | extern int gart_iommu_hole_init(void); | |
41 | ||
42 | #else | |
43 | #define gart_iommu_aperture 0 | |
44 | #define gart_iommu_aperture_allowed 0 | |
45 | #define gart_iommu_aperture_disabled 1 | |
46 | ||
47 | static inline void early_gart_iommu_check(void) | |
48 | { | |
49 | } | |
50 | static inline void gart_parse_options(char *options) | |
51 | { | |
52 | } | |
53 | static inline int gart_iommu_hole_init(void) | |
54 | { | |
55 | return -ENODEV; | |
56 | } | |
57 | #endif | |
58 | ||
59 | extern int agp_amd64_init(void); | |
60 | ||
61 | static inline void gart_set_size_and_enable(struct pci_dev *dev, u32 order) | |
62 | { | |
63 | u32 ctl; | |
64 | ||
65 | /* | |
66 | * Don't enable translation but enable GART IO and CPU accesses. | |
67 | * Also, set DISTLBWALKPRB since GART tables memory is UC. | |
68 | */ | |
69 | ctl = order << 1; | |
70 | ||
71 | pci_write_config_dword(dev, AMD64_GARTAPERTURECTL, ctl); | |
72 | } | |
73 | ||
74 | static inline void enable_gart_translation(struct pci_dev *dev, u64 addr) | |
75 | { | |
76 | u32 tmp, ctl; | |
77 | ||
78 | /* address of the mappings table */ | |
79 | addr >>= 12; | |
80 | tmp = (u32) addr<<4; | |
81 | tmp &= ~0xf; | |
82 | pci_write_config_dword(dev, AMD64_GARTTABLEBASE, tmp); | |
83 | ||
84 | /* Enable GART translation for this hammer. */ | |
85 | pci_read_config_dword(dev, AMD64_GARTAPERTURECTL, &ctl); | |
86 | ctl |= GARTEN | DISTLBWALKPRB; | |
87 | ctl &= ~(DISGARTCPU | DISGARTIO); | |
88 | pci_write_config_dword(dev, AMD64_GARTAPERTURECTL, ctl); | |
89 | } | |
90 | ||
91 | static inline int aperture_valid(u64 aper_base, u32 aper_size, u32 min_size) | |
92 | { | |
93 | if (!aper_base) | |
94 | return 0; | |
95 | ||
96 | if (aper_base + aper_size > 0x100000000ULL) { | |
97 | printk(KERN_INFO "Aperture beyond 4GB. Ignoring.\n"); | |
98 | return 0; | |
99 | } | |
100 | if (e820_any_mapped(aper_base, aper_base + aper_size, E820_RAM)) { | |
101 | printk(KERN_INFO "Aperture pointing to e820 RAM. Ignoring.\n"); | |
102 | return 0; | |
103 | } | |
104 | if (aper_size < min_size) { | |
105 | printk(KERN_INFO "Aperture too small (%d MB) than (%d MB)\n", | |
106 | aper_size>>20, min_size>>20); | |
107 | return 0; | |
108 | } | |
109 | ||
110 | return 1; | |
111 | } | |
112 | ||
113 | #endif /* _ASM_X86_GART_H */ |