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77ef50a5 VN |
1 | #ifndef ASM_X86__GART_H |
2 | #define ASM_X86__GART_H | |
395624fc | 3 | |
0abbc78a PM |
4 | #include <asm/e820.h> |
5 | ||
6703f6d1 | 6 | extern void set_up_gart_resume(u32, u32); |
e93be88d | 7 | |
395624fc JR |
8 | extern int fallback_aper_order; |
9 | extern int fallback_aper_force; | |
395624fc | 10 | extern int fix_aperture; |
395624fc | 11 | |
aa134f1b PM |
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 | ||
21 | /* GART cache control register bits. */ | |
22 | #define INVGART (1<<0) | |
23 | #define GARTPTEERR (1<<1) | |
24 | ||
25 | /* K8 On-cpu GART registers */ | |
26 | #define AMD64_GARTAPERTURECTL 0x90 | |
27 | #define AMD64_GARTAPERTUREBASE 0x94 | |
28 | #define AMD64_GARTTABLEBASE 0x98 | |
29 | #define AMD64_GARTCACHECTL 0x9c | |
30 | #define AMD64_GARTEN (1<<0) | |
31 | ||
237a6224 JR |
32 | extern int agp_amd64_init(void); |
33 | ||
3bb6fbf9 PM |
34 | static inline void enable_gart_translation(struct pci_dev *dev, u64 addr) |
35 | { | |
36 | u32 tmp, ctl; | |
37 | ||
38 | /* address of the mappings table */ | |
39 | addr >>= 12; | |
40 | tmp = (u32) addr<<4; | |
41 | tmp &= ~0xf; | |
42 | pci_write_config_dword(dev, AMD64_GARTTABLEBASE, tmp); | |
43 | ||
44 | /* Enable GART translation for this hammer. */ | |
45 | pci_read_config_dword(dev, AMD64_GARTAPERTURECTL, &ctl); | |
46 | ctl |= GARTEN; | |
47 | ctl &= ~(DISGARTCPU | DISGARTIO); | |
48 | pci_write_config_dword(dev, AMD64_GARTAPERTURECTL, ctl); | |
49 | } | |
50 | ||
0abbc78a PM |
51 | static inline int aperture_valid(u64 aper_base, u32 aper_size, u32 min_size) |
52 | { | |
53 | if (!aper_base) | |
54 | return 0; | |
55 | ||
56 | if (aper_base + aper_size > 0x100000000ULL) { | |
9b156845 | 57 | printk(KERN_INFO "Aperture beyond 4GB. Ignoring.\n"); |
0abbc78a PM |
58 | return 0; |
59 | } | |
60 | if (e820_any_mapped(aper_base, aper_base + aper_size, E820_RAM)) { | |
9b156845 | 61 | printk(KERN_INFO "Aperture pointing to e820 RAM. Ignoring.\n"); |
0abbc78a PM |
62 | return 0; |
63 | } | |
64 | if (aper_size < min_size) { | |
9b156845 | 65 | printk(KERN_INFO "Aperture too small (%d MB) than (%d MB)\n", |
0abbc78a PM |
66 | aper_size>>20, min_size>>20); |
67 | return 0; | |
68 | } | |
69 | ||
70 | return 1; | |
71 | } | |
72 | ||
77ef50a5 | 73 | #endif /* ASM_X86__GART_H */ |