1 #ifndef _ASM_X8664_GART_H
2 #define _ASM_X8664_GART_H 1
6 extern void set_up_gart_resume(u32, u32);
8 extern int fallback_aper_order;
9 extern int fallback_aper_force;
10 extern int fix_aperture;
14 #define GPTE_COHERENT 2
16 /* Aperture control register bits. */
18 #define DISGARTCPU (1<<4)
19 #define DISGARTIO (1<<5)
21 /* GART cache control register bits. */
22 #define INVGART (1<<0)
23 #define GARTPTEERR (1<<1)
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)
32 static inline void enable_gart_translation(struct pci_dev *dev, u64 addr)
36 /* address of the mappings table */
40 pci_write_config_dword(dev, AMD64_GARTTABLEBASE, tmp);
42 /* Enable GART translation for this hammer. */
43 pci_read_config_dword(dev, AMD64_GARTAPERTURECTL, &ctl);
45 ctl &= ~(DISGARTCPU | DISGARTIO);
46 pci_write_config_dword(dev, AMD64_GARTAPERTURECTL, ctl);
49 static inline int aperture_valid(u64 aper_base, u32 aper_size, u32 min_size)
54 if (aper_base + aper_size > 0x100000000ULL) {
55 printk(KERN_ERR "Aperture beyond 4GB. Ignoring.\n");
58 if (e820_any_mapped(aper_base, aper_base + aper_size, E820_RAM)) {
59 printk(KERN_ERR "Aperture pointing to e820 RAM. Ignoring.\n");
62 if (aper_size < min_size) {
63 printk(KERN_ERR "Aperture too small (%d MB) than (%d MB)\n",
64 aper_size>>20, min_size>>20);