DMP/Vortex86EX can't cache ROM area on the top of 4G memory, so romstage area can't be cached. :(
I am thinking...should I just replace memmove function with REP MOVS version, or use __PRE_RAM__ macro to choose which memmove version to use? (Because in romstage REP MOVS runs much faster). 2013/8/16 Patrick Georgi <[email protected]>: > Am 2013-08-15 14:01, schrieb Andrew Wu: > >> is 256-byte aligned, otherwise it will failback to use slower MOV >> loop. MOV loop is much slower then >> REP MOVSL on Vortex86EX, because reading instructions from ROM is slow. > > Can't you cache the ROM area? > > Other than that: Optimizing the common code is better than a special case. > memmove won't change much, so that's a stable interface, but you never know > what will happen (and few people will be able to test their changes on > Vortex86). > > > Patrick > > > -- > coreboot mailing list: [email protected] > http://www.coreboot.org/mailman/listinfo/coreboot -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
