lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

x86 gart: factor out common code

Browse Source 
Cleanup gart handling on amd64 a bit: move common code into
enable_gart_translation , and use symbolic register names where
appropriate.

Signed-off-by: Pavel Machek <pavel@suse.cz>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Pavel Machek
2008-04-15 12:43:57 +02:00
committed by Ingo Molnar
parent 330fce23da
commit 3bb6fbf996
3 changed files with 32 additions and 37 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
include/asm-x86/gart.h
View File

@@ -52,4 +52,21 @@ static inline void gart_iommu_shutdown(void)
#define AMD64_GARTCACHECTL 0x9c
#define AMD64_GARTEN (1<<0)
static inline void enable_gart_translation(struct pci_dev *dev, u64 addr)
{
u32 tmp, ctl;
/* address of the mappings table */
addr >>= 12;
tmp = (u32) addr<<4;
tmp &= ~0xf;
pci_write_config_dword(dev, AMD64_GARTTABLEBASE, tmp);
/* Enable GART translation for this hammer. */
pci_read_config_dword(dev, AMD64_GARTAPERTURECTL, &ctl);
ctl |= GARTEN;
ctl &= ~(DISGARTCPU | DISGARTIO);
pci_write_config_dword(dev, AMD64_GARTAPERTURECTL, ctl);
}
#endif