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/* $Id: devmap.c,v 1.1 2005-12-20 09:49:32 jcastillo Exp $

 * promdevmap.c:  Map device/IO areas to virtual addresses.

 *

 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)

 */

#include <asm/openprom.h>

#include <asm/oplib.h>

/* Just like the routines in palloc.c, these should not be used

 * by the kernel at all.  Bootloader facility mainly.  And again,

 * this is only available on V2 proms and above.

 */

/* Map physical device address 'paddr' in IO space 'ios' of size

 * 'num_bytes' to a virtual address, with 'vhint' being a hint to

 * the prom as to where you would prefer the mapping.  We return

 * where the prom actually mapped it.

 */

char *

prom_mapio(char *vhint, int ios, unsigned int paddr, unsigned int num_bytes)

{

        if((num_bytes == 0) || (paddr == 0)) return (char *) 0x0;

        return (*(romvec->pv_v2devops.v2_dumb_mmap))(vhint, ios, paddr,

                                                     num_bytes);

}

/* Unmap an IO/device area that was mapped using the above routine. */

void

prom_unmapio(char *vaddr, unsigned int num_bytes)

{

        if(num_bytes == 0x0) return;

        (*(romvec->pv_v2devops.v2_dumb_munmap))(vaddr, num_bytes);

        return;

}