#12453 BLOC 13.1.0: [CL4] System randomly hangs up at big 01.

Zarro Boogs per Child bugtracker at laptop.org
Wed Jan 23 22:23:45 EST 2013

#12453: [CL4] System randomly hangs up at big 01.
           Reporter:  tomyin        |       Owner:  cjb          
               Type:  defect        |      Status:  new          
           Priority:  blocker       |   Milestone:  13.1.0       
          Component:  not assigned  |     Version:  not specified
         Resolution:                |    Keywords:               
        Next_action:  diagnose      |    Verified:  0            
Deployment_affected:                |   Blockedby:               
           Blocking:                |  

Comment(by wmb at firmworks.com):

 The problem has been tracked down to corruption of CForth's interrupt
 stack, specifically the saved PC value.  Moving the interrupt stack from
 SRAM to TCM works around the problem.  The root cause of the corruption is
 as yet undetermined.  It could be hardware, or a bug in the CForth
 interrupt handling code, or a bad setting for the suspend/resume
 parameters relating to SRAM, or a driver bug that causes writing to some
 SRAM locations that are not owned by the driver.

Ticket URL: <http://dev.laptop.org/ticket/12453#comment:8>
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