File: /usr/src/linux/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     }
30