REG_GCRBBR
u32 base = gc_readl(priv, REG_GCRBBR); \
gc_readl(priv, REG_GCRBBR), \
gc_writel(priv, REG_GCRBBR, priv->shared_phys);
u32 base = gc_readl(priv, REG_GCRBBR);
gc_readl(priv, REG_GCRBBR),
gc_writel(priv, REG_GCRBBR, shared->buffer_phys);