A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-30 03:27:44 -04:00
Code Issues Projects Releases Packages Wiki Activity

MIPS: Octeon: Adjust top of DMA32 zone.

Browse source 
On OCTEON, we reserve the last 256MB of 32-bit PCI address space, mapping
the RAM in this region at a high DMA address.  This makes memory in this
region unavailable for 32-bit DMA.

Signed-off-by: David Daney <[email protected]>
Patchwork: http://patchwork.linux-mips.org/patch/1634/
Signed-off-by: Ralf Baechle <[email protected]>
This commit is contained in:
David Daney 2010-10-01 13:27:29 -07:00 • committed by Ralf Baechle
commit 57575b5c81
1 changed files with 6 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

6
arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h
View file

@ -81,4 +81,10 @@ static inline int octeon_has_saa(void)
return id >= 0x000d0300;
}
/*
* The last 256MB are reserved for device to device mappings and the
* BAR1 hole.
*/
#define MAX_DMA32_PFN (((1ULL << 32) - (1ULL << 28)) >> PAGE_SHIFT)
#endif