Hi, Robert On Tue, Nov 9, 2010 at 7:02 AM, Robert Millan <rmh@xxxxxxx> wrote: > 2010/11/8 David Daney <ddaney@xxxxxxxxxxxxxxxxxx>: >> Look at the description of the register in this document: >> >> http://dev.lemote.com/files/resource/documents/Loongson/ls2e/godson2e.user.manual.pdf >> >> On page 49, it says that bits 0-3 contain the minor version number and bits >> 4-7 are the major version number (according to a workmate that reads >> Chinese). >> >> I don't know for certain, but it seems plausible that the 2E and 2F will >> differ in bits 4-7, and bits 0-3 can be ignored. > > Thanks for investigating, but ignoring bits 0-3 doesn't > really change anything. Our problem was that bits 0-7 > are the same on 2E and 2F (0x02). If we ignore bits 0-3, > then our problem is that bits 4-7 are the same on 2E > and 2F (0x2). Just rechecked this with a friend from Lemote, in reality, the revision id of Loongson-2F is 0x3, so, my old code should be a reference for you: arch/mips/loongson/common/platform.c PRID_REV_LOONGSON2F and PRID_REV_LOONGSON2E has already been defined in arch/mips/include/asm/cpu.h So, the manual is buggy, perhaps the editors of the manuals did copy and paste for I have found the title of the 2F manual is the same as the 2E manual ;-) Best Regards, Wu Zhangjin
