diff options
| author | Pavel Machek <pavel@ucw.cz> | 2008-04-15 12:43:57 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-05-12 21:28:10 +0200 |
| commit | 3bb6fbf9969a8bbe4892968659239273d092e78a (patch) | |
| tree | 26ede22e0622abfbb585cd83199b2615b4b4542d /include | |
| parent | 330fce23dab6e6a3d1979e55f27aba4c0c301331 (diff) | |
x86 gart: factor out common code
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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-x86/gart.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/asm-x86/gart.h b/include/asm-x86/gart.h index 248e5778e928..6f22786d2f0c 100644 --- a/include/asm-x86/gart.h +++ b/include/asm-x86/gart.h @@ -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 |