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>
diff --git a/include/asm-x86/gart.h b/include/asm-x86/gart.h
index 248e577..6f22786 100644
--- a/include/asm-x86/gart.h
+++ b/include/asm-x86/gart.h
@@ -52,4 +52,21 @@
#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