CB_COLOR2_BASE   2240 drivers/gpu/drm/radeon/evergreend.h #define	CB_COLOR2_BASE					0x28cd8
CB_COLOR2_BASE     72 drivers/gpu/drm/radeon/r600d.h #define	CB_COLOR2_BASE					0x28048
CB_COLOR2_BASE    315 drivers/gpu/drm/radeon/rv770d.h #define	CB_COLOR2_BASE					0x28048