Hello, Could you help me : I work on embedded Linux on a MPC885 processor (PowerPC). On my embedded system, i have 2 different components of RAM. One (name = DV, total size of 256 MB ) is only accessed by the processor, the other (name = MC, size = 2MB on the top of the RAM) is also access by an FPGA. I want to do data transferts between each others. For that, I have to allocate a big structure on DV for a size of 36 MB. - Could I do like that to have contiguous memory on DV ? For MC, it would be more complicated : I have to map on the physical adresses of MC (for example 1300 0000-13FF FFFF) in order to be sure that the memory will be really allocated on MC and not on DV (as there is enough place on DV). - How can I do that ? - Do I have to write a driver and use ioremap on the physical address of MC (with reserving the top of memory with 'mem=' at boot time) ? Can i use physical addresses with ioremap or is it only virtual addresses ? I think i can reserve the memory early in boot via the bootmem allocator but i think it isn't with physical addresses only an amount of memory and it's only forbdrivers directly linked in the kernel image and i want a module. - Is there another solution to do that ?
Thank you really for your help. Best regards. ---------------------------------------------------------- Sophie CARAYOL TECHNOLOGIES & SYSTEMES 50 rue du Pr?sident Sadate F - 29337 QUIMPER CEDEX T?l: +33 2 98 10 30 06 mailto:scarayol at assystembrime.com ----------------------------------------------------------
