how to bypass the data cache

> after u-boot start. there is 2k dcache in my board, if i use hal libary, where

> can download this libary?

There is no need to use the HAL for u-boot. You can use the CACHE_BYPASS

macro (not recommended), readx/writex (asm/io.h), or the flush_dache()

operation (asm/cache.h) -- depending on what you are trying to do.

If your device is capable of acting as a bus master, you should use the u-boot

flush_dcache operation after initializing a transmit buffer, or before

passing a receive buffer to the bus master (make sure the rx buffer is invalidated).

If your device is not capable of acting as a bus master, you have no need to use

any of the cache bypass macros when reading/writing the buffer -- only for reading

or writing the hardware registers.

Regards,

--Scott