PPC4XX_NUM_GD
sizeof(struct ce_gd) * PPC4XX_NUM_GD,
sizeof(struct ce_gd) * PPC4XX_NUM_GD,
if (n >= PPC4XX_NUM_GD)
tmp = (dev->gdr_head + n) % PPC4XX_NUM_GD;
#define PPC4XX_LAST_GD (PPC4XX_NUM_GD - 1)
#define PPC4XX_GDR_SIZE PPC4XX_NUM_GD