In message OF35478C15.8439F998-ONC2256EA7.004A3D27-88256EA7.004B09F2@mksinst.com you wrote:
I work with custom board based on MPC850. This board has 8MB flash on address 0xff800000 I try to access (get/set) memory using BDI2000 telnet API (MD/MM) Unfortunately all memory I can see is the flash. It appears on address 0 (MD 0) and returns every 8MB. Command PHYS 0 (map physical address) returns 0.
You must initialize the memory corntoller for the RAM, i. e. program the BRx/ORx registers, set up the UPM engine and run the SDRAM's init sequence (whatever this requires for your SDRAM chips).
How can I access DRAM using BDI telnet API?
Sure. If the memory controller was set up correctly.
Examples can be find in most BDI2000 config files (both those which come with the BDI and those on our FTP server), but don't expect that a simple copy & paste would work. You really need to understand what you're doing. Setting up the SDRAM is the most complicated task when porting to new hardware (at least judging from the number of people who run into truble with this).
Best regards,
Wolfgang Denk