On Wed, Sep 06, 2006 at 02:41:36PM -0700, Jonathan Day wrote: > Date: Wed, 6 Sep 2006 14:41:36 -0700 (PDT) > From: Jonathan Day <imipak@xxxxxxxxx> > Subject: Resetting a Broadcom in software > To: linux-mips@xxxxxxxxxxxxxx > Content-Type: multipart/mixed; boundary="0-1897457798-1157578896=:54718" > > Hi, > > A co-worker wrote the following test of the Broadcom's > maths abilities and discovered that it reboots some > (but not all) MIPS processors it has been tested on. > It'll reboot the Sentosa, for example, but NOT the > Swarm. > > (Apologies for the ugly coding, btw.) > > You just make the first file, the ATL_ file gets > included into it. The compiler flags I'm using are: > > -march=sb1 -mabi=64 -fomit-frame-pointer -O3 -mips64 > -mfused-madd > > The program doesn't link to anything and no linker > flags are needed. > > This begs three questions: > > 1) What is happening to cause the CPU to reset? (It's > not a kernel bug, it's an actual CPU reset) > > 2) What is NOT happening on the Swarm, allowing it to > work fine? > > 3) Is the problem in the category of "preventable in > hardware", "preventable in the kernel", or > "preventable by slowly roasting those coders who write > like this"? This is not a problem I know of but given your description it sounds very much like a hardware issue. Can you find about the exact versions of the 1250 on the various board? With the FPU being on chip I would expect some correlation between the chip revision and this issue. Ralf
