On Thu, Jan 31, 2019 at 01:54:52PM +0300, Peter Mamonov wrote: > Hello, Andrey, > > > In order to allow access to second half of address space on 64-bit > > machines, add code that creates /dev/highmem dedicated for that. > > > > Note that due to maximum file size being limited to MAX_LFS_FILESIZE > > or 0x7fff_ffff_ffff_ffff bytes at addresses 0x7fff_ffff_ffff_ffff and > > 0xffff_ffff_ffff_ffff cannot be access through /dev/mem and > > /dev/hightmem correspondingly. > > Does it imply using `-s /dev/highmem` argument when accessing addresses > beyond > MAX_LFS_FILESIZE? That's not very convenient: > > $ git grep -l /dev/mem > commands/crc.c > commands/digest.c > commands/disasm.c > commands/md.c > commands/memcmp.c > commands/memcpy.c > commands/memset.c > commands/mm.c > commands/mw.c
I've forgotten to mention, that all meaningful MIPS64 virtual addresses belong to the 2nd half of the address space. Except for user segment addresses which are not used in barebox. > > Regards, > Peter _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox
