cvs commit: src/sys/boot/i386/cdboot cdboot.s src/sys/boot/i386/pxeldr pxeldr.S

[Maxim Sobolev]

sobomax     2006-04-14 03:47:51 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_6)
    sys/boot/i386/cdboot cdboot.s 
    sys/boot/i386/pxeldr pxeldr.S 
  Log:
  MFC: When enabling A20 put upper limit on amount of time we wait for the
  keyboard controller to get ready (65K x ISA access time, visually around
  1 second). If we have wait more than that amount it's likely that the
  hardware is a legacy-free one and simply doesn't have keyboard controller
  and doesn't require enabling A20 at all.
  
  This makes cdboot/pxeldr working for MacBook Pro with Boot Camp and
  other legacy-free i386 hardware like IBM Netvista S40.
  
  Approved by:    re (scottl)
  
  Revision  Changes    Path
  1.13.8.1  +10 -3     src/sys/boot/i386/cdboot/cdboot.s
  1.13.8.1  +10 -3     src/sys/boot/i386/pxeldr/pxeldr.S