On Wed, Aug 03, 2005 at 09:50:49AM -0700, yhlu wrote: > You need split mess into two seperate thing > 1. does flash_rom support your MB, some mb has gpio to disable the > flash write or last 64KiB > 2. are you give dead bios savior. > > ps. other thing about flash_rom > 1. with 2.6 kernel 64 bit for amd8111 based MB, you can not install 4G > or more in CPU0. > 2. with 2.6 kernel 64 bit for Nvidia ck804 based MB, you must install > 4G or more in CPU0 > > solution is use 32 bit 2.6 or 2.4 32bit or 2.4 64 bit. > for case 1 you can command line: maxmem to limit mem to 4G less. > > It seems last 4KiB near 4G can not be accessed. when read in Linux it > alreays show 0. > > Andi may have some idea about it. maybe something related iommu...
IOMMU is not involved here. Me and Torsten looked at it some time ago and we suspected a chipset issue because there was nothing obviously special with the way that memory was mapped via /dev/mem. -Andi _______________________________________________ LinuxBIOS mailing list [email protected] http://www.openbios.org/mailman/listinfo/linuxbios
