Sophie CARAYOL wrote: [...] > What is the good manner to read or write in the physical memory?
Please have a look at Denx's FAQ for accessing memory bus: http://www.denx.de/twiki/bin/view/PPCEmbedded/DeviceDrivers#Section_Acce ssingPeripheralsFromUserSpace or shorter: http://tinyurl.com/6c7th Depending on the O_SYNC flag passed to open, the mmap'ed memory will be accessed through non guarded cache or not. See linux/drivers/char/mem.c. The ppc instruction "eieio" deals with I/O ordering. Kenavo -- Stephane PS: be careful not sending twice the same mail to the list
