u8 reserved[8];
};
-/* Descriptors stucture & co */
+/* Descriptors structure & co */
#define BCOM_DESC_NOP 0x000001f8
#define BCOM_LCD_MASK 0x80000000
#define BCOM_DRD_EXTENDED 0x40000000
#define TASK_ENABLE 0x8000
+/**
+ * bcom_disable_prefetch - Hook to disable bus prefetching
+ *
+ * ATA DMA and the original MPC5200 need this due to silicon bugs. At the
+ * moment disabling prefetch is a one-way street. There is no mechanism
+ * in place to turn prefetch back on after it has been disabled. There is
+ * no reason it couldn't be done, it would just be more complex to implement.
+ */
+static inline void bcom_disable_prefetch(void)
+{
+ u16 regval;
+
+ regval = in_be16(&bcom_eng->regs->PtdCntrl);
+ out_be16(&bcom_eng->regs->PtdCntrl, regval | 1);
+};
+
static inline void
bcom_enable_task(int task)
{