cvs commit: src/sys/i386/acpica madt.c src/sys/i386/i386 io_apic.c machdep.c mptable.c src/sys/i386/include apicvar.h

[John Baldwin]

jhb         2004/05/10 11:49:58 PDT

  FreeBSD src repository

  Modified files:
    sys/i386/acpica      madt.c 
    sys/i386/i386        io_apic.c machdep.c mptable.c 
    sys/i386/include     apicvar.h 
  Log:
  Rework the APIC mixed mode support a bit:
  - Require the APIC enumerators to explicitly enable mixed mode by calling
    ioapic_enable_mixed_mode().  Calling this function tells the apic driver
    that the PC-AT 8259A PICs are present and routable through the first I/O
    APIC via an ExtINT pin.  The mptable enumerator always calls this
    function for now.  The MADT enumerator only enables mixed mode if the
    PC-AT compatability flag is set in the MADT header.
  - Allow mixed mode to be enabled or disabled via a 'hw.apic.mixed_mode'
    tunable.  By default this tunable is set to 1 (true).  The kernel option
    NO_MIXED_MODE changes the default to 0 to preserve existing behavior, but
    adding 'hw.apic.mixed_mode=0' to loader.conf achieves the same effect.
  - Only use mixed mode to route IRQ 0 if it is both enabled by the APIC
    enumerator and activated by the loader tunable.  Note that both
    conditions must be true, so if the APIC enumerator does not enable mixed
    mode, then you can't set the tunable to try to override the enumerator.
  
  Revision  Changes    Path
  1.14      +2 -0      src/sys/i386/acpica/madt.c
  1.9       +33 -19    src/sys/i386/i386/io_apic.c
  1.588     +5 -0      src/sys/i386/i386/machdep.c
  1.232     +1 -0      src/sys/i386/i386/mptable.c
  1.7       +1 -0      src/sys/i386/include/apicvar.h