obp/obp/arch/sun4s/reentry-table.fth

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\ Hypervisor Software File: reentry-table.fth
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id: @(#)reentry-table.fth 1.8 06/02/16
purpose:
copyright: Copyright 2006 Sun Microsystems, Inc.  All Rights Reserved
copyright: Use is subject to license terms.

headerless

\ the Reentry Eligibility Table is an array of 8 byte words
\ indexed by CPU ID.  This table needs to be created at
\ compile time since POST expects the OBP dictionary entry be
\ locked in I-TLB.  See FWARC/2000/022 for details.
max-mondo-target# /x * constant /reentry-flag-table
/x (align) here /reentry-flag-table allot
dup /reentry-flag-table erase
origin- ROMbase + constant reentry-flag-table

\ mark the given CPU as eligible for reset reentry
: enable-reentry  ( mid -- )
   dup 0 max-mondo-target# within  if           ( mid )
      /x * reentry-flag-table + true swap x!    ( )
   else                                         ( mid )
      drop                                      ( )
   then                                         ( )
;

\ mark the given CPU as ineligible for reset reentry
: disable-reentry  ( mid -- )
   dup 0 max-mondo-target# within  if           ( mid )
      /x * reentry-flag-table + false swap x!   ( )
   else                                         ( mid )
      drop                                      ( )
   then                                         ( )
;

stand-init: Enable Reset Reentry Table
   \ slave CPUs will enable reentry for themselves
   mid@ enable-reentry
   reentry-flag-table ROMbase !
;