projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1965aae3 PA |
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 | ||
| 1965aae3 | 73 | #endif /* _ASM_X86_GART_H */ |