NOEL-V XLEN 64 bits with AHB 32 bits

NOEL-V
1

Hello,

Into our design we have configure NOEL-V processor with XLEN = 64 (configuration CFG_NOELV_XLEN = 64)
We would like to have the internal AHB size to 32 bits length (configuration of CFG_AHBDW=64)

In this configuration the ISA test suite and 64bits instructions in general are not working. This is normal ? We haven’t found into the library documentation a clear sentence about that.

Thank you for your reply.
Regards,

Lucas

2

Hi Lucas,

I am not sure if I follow. The AHB size is set to 64 bits according to the constants, but you mentioned 32. Which one is correct? Relevant text below:

“We would like to have the internal AHB size to 32 bits length (configuration of CFG_AHBDW=64)”

Joaquin

3

Hello,
You are right i have made a mistake.
My configuration is AHB 32 bits => CFG_AHBDW=32
My CPU XLEN is set to 64 with CFG_NOELV_XLEN = 64

For this configuration it doesn’t work. Is it normal ? Do we have to make some others configuration ?

Thank you for your reply.

Best Regards,
Lucas