Hi
I am hoping to learn more about how C64x access memory with the L1/L2 cache
architecture.
If I use try to read a 16-bit value (with LDH) from a non-cached region in the
external SDRAM (64-bit wide), does C64x performs a 16-bit access to the SDRAM to
fetch just that value? Or does it perform 64-bit reads to get 64 bytes (L1D line
size) worth of data?
I did a simple test where I read-in a continguous block of memory using 16-bit
access and it seems to be slower than the corresponding 32-bit/64-bit accesses.
I am wondering why this is the case given that the L1D line size is 64
bytes..
Thanks
Chi Ho
