--- Paul Gortmaker <p_gortmaker at yahoo.com> wrote: > I've been trying to get a WRS 8265 to do a warm reboot, and > found some > things that I am wondering about. > > Firstly, is anyone having success on having "reboot" restart > the machine > on a similar platform? > > Secondly, the default BOOTROM_RESTART_ADDR is 0x40000104 > (sbc82xx.h) and I > was wondering if this matches any platforms out there. On > this board, the > place where U-Boot lives is 0xFFF00104 -- and I've verified > this by typing > "g fff00104" at the U-Boot prompt which causes U-Boot to > simply restart. > > I've changed the value in sbc82xx.h and now at the reboot, > instead of a > register dump, it simply hangs. Looking at m8260_gorom (in > kernel/head.S) > it clears the MSR_EE (ext int. enable) bit in the MSR before > jumping -- > but I was wondering if there are other bits in MSR that need > to be > cleared; e.g. instruction relocation enable and data > relocation enable > (MSR_IR and MSR_DR). The register bits are on p76 of > MPCFPE32B.pdf from > Freescale. > > I guess if somebody even said "it works for me" then I'd have > a better > feeling thinking that what is done to the MSR currently is > sufficient. > > Paul. > I'm working on the exact same problem with u-boot (trying to do warm reboot from the VxWorks shell). I modified romInit.S to pass control to u-boot (at 0xfe000000) and that works just fine. But after I boot VxWorks from u-boot (go 0xfff00100) and invoke reboot from the VxWorks shell, it just hangs. If I boot VxWorks without invoking u-boot first, it works fine. If you find the problem befor me, let me know and I'll do tha same...
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