S_000004_MC_FB_START  165 drivers/gpu/drm/radeon/r520d.h #define   S_000004_MC_FB_START(x)                      (((x) & 0xFFFF) << 0)
S_000004_MC_FB_START  509 drivers/gpu/drm/radeon/rs600d.h #define   S_000004_MC_FB_START(x)                      (((x) & 0xFFFF) << 0)