How to go from 32-bit to 64-bit AHB data bus

System

SoC Design forum How to go from 32-bit to 64-bit AHB data bus

State Not Answered
Replies 4 replies
Subscribers 71 subscribers
Views 4661 views
Users 0 members are here

Note: This was originally posted on 21st November 2007 at http://forums.arm.com

Hi,
I have to write a C program for an ARM processor that has a 64-bit data bus (ARM11, Cortex-R4) and to perform some simulations afterward (Verilog). So far I have only worked with processors that had 32-bit wide AHB data bus (ARM9). I am not completely clear what changes for me here when I am doing the transition from 32-bits to 64-bits data buses? What are the main considerations I have to take into account regarding this matter? Will my program written for ARM966 compile for ARM11 and what the global changes in the ELF file will be? I assume the ARM instructions and address bus are 32-bit wide (and there is no ARM processor yet with a 32-bit wide address bus). I plan to put the ELF file into 64-bit wide Verilog memory for the simulation - does everything have to be 8 bytes aligned in that case?
Please give me some comments regarding these issues.
Thank you very much,
Tamo

strobe 0

AXI4-Relationships between the channels 0

How to assert PSLVERR in APB4 ? 0

How AHB Arbiter should handle granting bus masters while performing only a SINGLE transfer? 0

Should the SPLIT and RETRY response be given only for NONSEQ transfer? 0