[U-Boot] [PATCH 3/3] mpc83xx: turn on icache in core initialization to improve u-boot boot time

Scott Wood scottwood at freescale.com
Mon Apr 19 22:41:00 CEST 2010


Timur Tabi wrote:
> On Thu, Apr 15, 2010 at 5:36 PM, Kim Phillips
> <kim.phillips at freescale.com> wrote:
> 
>>  #define CONFIG_SYS_HID0_FINAL  (HID0_ENABLE_MACHINE_CHECK | \
>> -                        HID0_ENABLE_DYNAMIC_POWER_MANAGMENT)
>> +                                HID0_ENABLE_INSTRUCTION_CACHE | \
>> +                                HID0_ENABLE_DYNAMIC_POWER_MANAGMENT)
> 
> What was so special about the 8349ITX that icache() didn't work?
> You're changing the HDI0 values for all of the 83xx boards, but AFAIK,
> only the ITX had this problem.

All 83xx boards had the performance problem of not enabling icache until 
after relocation.

-Scott


More information about the U-Boot mailing list