[U-Boot] Question about cfi flash driver can not work well in cacheable region !

[Rick Chen]

Hi Stefan and other seniors

I encounter some problems about cfi flash driver.
And hope you can give some comments to resolve it.
Followings are the flash verification status and descriptions :

When I verify cfi flash which it's address base is in cacheable region
(0x88000000) and cache is enabled in system.
The flash detection, write and erase action will be failure somehow.
The failure messages will be as below:

#################
# Detection failure #
#################
Flash: ## Unknown flash on Bank 1 - Size = 0x00000000 = 0 MB
0 Bytes

###########
# Erase fail #
###########
protect off all; erase 0x88000000 0x8bffffff;
Error: start and/or end address not on sector boundary
RISC-V #

###########
# Write fail #
###########
RISC-V # cp.b 0x20000000 0x8bf00000 0x1444
RISC-V #

But when I disable cache in system, they will all pass the verification.

################
# Detection pass #
################
Flash: 64 MiB

#############
# erase pass #
#############
protect off all; erase 0x88000000 0x8bffffff;
Un-Protect Flash Bank # 1

................................................
................................................
................................................
................................................
................................................
................................................
................................................
................................................
................................................
................................................
................................ done
Erased 512 sectors
RISC-V #

##############
# write pass #
##############
RISC-V # cp.b 0x20000000 0x8bf00000 0x1444
Copy to Flash... done
RISC-V #

How can I enable cache and let cfi flash can work fine to get better
performance ?

Do you have any comments ?

Thanks
Rick