release/src-rt-6.x/linux/linux-2.6/arch/sparc/prom/segment.c

   1 /* $Id: segment.c,v 1.7 2000/08/26 02:38:03 anton Exp $
   2  * segment.c:  Prom routine to map segments in other contexts before
   3  *             a standalone is completely mapped.  This is for sun4 and
   4  *             sun4c architectures only.
   5  *
   6  * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
   7  */
   8
   9 #include <linux/types.h>
  10 #include <linux/kernel.h>
  11 #include <linux/sched.h>
  12 #include <asm/openprom.h>
  13 #include <asm/oplib.h>
  14
  15 extern void restore_current(void);
  16
  17 /* Set physical segment 'segment' at virtual address 'vaddr' in
  18  * context 'ctx'.
  19  */
  20 void
  21 prom_putsegment(int ctx, unsigned long vaddr, int segment)
  22 {
  23         unsigned long flags;
  24         spin_lock_irqsave(&prom_lock, flags);
  25         (*(romvec->pv_setctxt))(ctx, (char *) vaddr, segment);
  26         restore_current();
  27         spin_unlock_irqrestore(&prom_lock, flags);
  28         return;
  29 }