Kohsuke Ohtani wrote: > You have to use PSE (page size extension) in such case. But, I believe > almost embedded systems don't have memory over 2G bytes.
I think PSE can't solve the problem. Page_Size_Extension can be used to select a larger page size of 4MB (vs 4KB standard size). But with 4MB page size (PSE bit set), page tables (2^ level paging) are not used. The entries in the page directory point to 4-MByte pages in PHYSICAL memory. This paging method can be used to map UP TO 1024 pages into a 4-GByte linear address space. So, with this scheme, is PREX DESIGNED to support at most 2GB of memory? (Note: if this is what we want, we would have to limit the memory size detected via BIOS call, setting the size to 2GB if greater than this limit) Thanks. Giovanni Chiacchiera con i tuoi amici in tempo reale! http://it.yahoo.com/mail_it/foot/*http://it.messenger.yahoo.com ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Prex-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/prex-devel
