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devops.c
Package: linux-2.4.20.tar.gz [view]
Upload User: jlfgdled
Upload Date: 2013-04-10
Package Size: 33168k
Code Size: 1k
Category:
Linux-Unix program
Development Platform:
Unix_Linux
- /* $Id: devops.c,v 1.3 1997/10/29 07:43:28 ecd Exp $
- * devops.c: Device operations using the PROM.
- *
- * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
- * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
- */
- #include <linux/types.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <asm/openprom.h>
- #include <asm/oplib.h>
- /* Open the device described by the string 'dstr'. Returns the handle
- * to that device used for subsequent operations on that device.
- * Returns 0 on failure.
- */
- int
- prom_devopen(char *dstr)
- {
- return p1275_cmd ("open", P1275_ARG(0,P1275_ARG_IN_STRING)|
- P1275_INOUT(1,1),
- dstr);
- }
- /* Close the device described by device handle 'dhandle'. */
- int
- prom_devclose(int dhandle)
- {
- p1275_cmd ("close", P1275_INOUT(1,0), dhandle);
- return 0;
- }
- /* Seek to specified location described by 'seekhi' and 'seeklo'
- * for device 'dhandle'.
- */
- void
- prom_seek(int dhandle, unsigned int seekhi, unsigned int seeklo)
- {
- p1275_cmd ("seek", P1275_INOUT(3,1), dhandle, seekhi, seeklo);
- }