Re: [U-Boot] p4080ds starts OS with MSR[EE]=1 and DEC armed?

Jimi Xenidis wrote:

That is true for "server" and "classic" because they do not necessarily stop at 0. for embedded you can just: /* u-boot leaves decrementer enabled */ mtspr(SPRN_DECAR, 0); /* paranoia */ mtspr(SPRN_DEC, 0); mtspr(SPRN_TCR, 0); mtspr(SPRN_TSR, 0);

I think you mean

mtspr(SPRN_TSR, 0xFFFFFFFF);

since it's write-1-to-clear. Other than that, this is exactly what I was talking about. I just think it makes sense for the boot loader to try to disable as many interrupt sources as possible, and force the OS to enable the ones it wants.

On the other hand, Scott's points are completely valid.