cvs commit: src/sys/i386/i386 local_apic.c src/sys/i386/include apicvar.h

[John Baldwin]

jhb         2004-12-23 19:47:59 UTC

  FreeBSD src repository

  Modified files:
    sys/i386/i386        local_apic.c 
    sys/i386/include     apicvar.h 
  Log:
  - Add a function to set the Task Priority Register (TPR) of the local APIC.
    Currently this is only used to initiailize the TPR to 0 during initial
    setup.
  - Reallocate vectors for the local APIC timer, error, and thermal LVT
    entries.  The timer entry is allocated from the top of the I/O interrupt
    range reducing the number of vectors available for hardware interrupts
    to 191.  Linux happens to use the same exact vector for its timer
    interrupt as well.  If the timer vector shared the same priority queue
    as the IPI handlers, then the frequency that the timer vector will
    eventually be firing at can interact badly with the IPIs resulting in
    the queue filling and the dreaded IPI stuck panics, hence it being located
    at the top of the previous priority queue instead.
  - Fixup various minor nits in comments.
  
  Revision  Changes    Path
  1.10      +25 -8     src/sys/i386/i386/local_apic.c
  1.10      +14 -10    src/sys/i386/include/apicvar.h