arch/sparc/prom/devmap.c

/* */
This source file includes following definitions.
prom_mapio
prom_unmapio
   1 /* $Id: devmap.c,v 1.2 1995/11/25 00:59:56 davem Exp $
   2  * promdevmap.c:  Map device/IO areas to virtual addresses.
   3  *
   4  * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
   5  */
   6 
   7 #include <asm/openprom.h>
   8 #include <asm/oplib.h>
   9 
  10 /* Just like the routines in palloc.c, these should not be used
  11  * by the kernel at all.  Bootloader facility mainly.  And again,
  12  * this is only available on V2 proms and above.
  13  */
  14 
  15 /* Map physical device address 'paddr' in IO space 'ios' of size
  16  * 'num_bytes' to a virtual address, with 'vhint' being a hint to
  17  * the prom as to where you would prefer the mapping.  We return
  18  * where the prom actually mapped it.
  19  */
  20 char *
  21 prom_mapio(char *vhint, int ios, unsigned int paddr, unsigned int num_bytes)
     /*  */
  22 {
  23         if((num_bytes == 0) || (paddr == 0)) return (char *) 0x0;
  24         return (*(romvec->pv_v2devops.v2_dumb_mmap))(vhint, ios, paddr,
  25                                                      num_bytes);
  26 }
  27 
  28 /* Unmap an IO/device area that was mapped using the above routine. */
  29 void
  30 prom_unmapio(char *vaddr, unsigned int num_bytes)
     /*  */
  31 {
  32         if(num_bytes == 0x0) return;
  33         (*(romvec->pv_v2devops.v2_dumb_munmap))(vaddr, num_bytes);
  34         return;
  35 }
/* */
root/arch/sparc/prom/devmap.c

DEFINITIONS
