[U-Boot-Users] [PATCH] MPC83xx platform memory access performance improved
galak at kernel.crashing.org
Tue May 30 17:30:28 CEST 2006
On May 30, 2006, at 12:06 AM, Liu Dave-r63238 wrote:
> Hi Wolfwang,
> Here is one patch which can make DMA performance improved 6x,
> memory write access performance improved 2.5x. and fixed some bugs.
> The change is:
> 1. Bus pipeline
> Set the CSB bus pipeline depth as 4, which makes 4 outstanding
> transcation on CSB bus.
> 2. Memory write
> When ECC enable, CPU write with 64bit. It makes DDR bus more
we need to be careful with this since not all 83xx have the ability
to do 64bit writes (832x doesn't have FP)
> 3. DMA performance
> DMA transfer with cache line burst read and burst write.
> 4. ECC test
> I fixed some bugs in ECC test code, and enhanced the test code.
> 5. Platform clean up and bug fixed
> I clean up the start.S file, and change the comments which comes
> from 826x and 74xx.
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