openbios/openboot/tools/promif/common/prom_io.c

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• Hash : 1a08f436
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  Date : 2010-08-25T09:23:17
  

  change to well-formed svn directory structure. git-svn-id: svn://coreboot.org/openboot/trunk@2 4486e004-3823-0410-90c7-fb508cc143bb

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• tools/promif/common/prom_io.c

• /*
  * ========== Copyright Header Begin ==========================================
  *
  * Hypervisor Software File: prom_io.c
  * 
  * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
  * 
  *  - Do no alter or remove copyright notices
  * 
  *  - Redistribution and use of this software in source and binary forms, with 
  *    or without modification, are permitted provided that the following 
  *    conditions are met: 
  * 
  *  - Redistribution of source code must retain the above copyright notice, 
  *    this list of conditions and the following disclaimer.
  * 
  *  - Redistribution in binary form must reproduce the above copyright notice,
  *    this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution. 
  * 
  *    Neither the name of Sun Microsystems, Inc. or the names of contributors 
  * may be used to endorse or promote products derived from this software 
  * without specific prior written permission. 
  * 
  *     This software is provided "AS IS," without a warranty of any kind. 
  * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, 
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A 
  * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN 
  * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR 
  * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR 
  * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN 
  * OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR 
  * FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE 
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, 
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF 
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
  * 
  * You acknowledge that this software is not designed, licensed or
  * intended for use in the design, construction, operation or maintenance of
  * any nuclear facility. 
  * 
  * ========== Copyright Header End ============================================
  */
  /*
   * Copyright (c) 2000-2003 Sun Microsystems, Inc.
   * All rights reserved.
   * Use is subject to license terms.
   */
  
  #pragma ident	"@(#)prom_io.c	1.1	00/08/07 SMI"
  
  #include <sys/promif.h>
  #include <sys/promimpl.h>
  
  /*
   *  Returns 0 on error. Otherwise returns a handle.
   */
  ihandle_t
  prom_open(char *path)
  {
  	cell_t ci[5];
  
  	ci[0] = p1275_ptr2cell("open");		/* Service name */
  	ci[1] = (cell_t)1;			/* #argument cells */
  	ci[2] = (cell_t)1;			/* #result cells */
  	ci[3] = p1275_ptr2cell(path);		/* Arg1: Pathname */
  	ci[4] = (cell_t)0;			/* Res1: Prime result */
  
  	(void) p1275_cif_handler(&ci);
  
  	return (p1275_cell2ihandle(ci[4]));	/* Res1: ihandle */
  }
  
  int
  prom_seek(ihandle_t fd, u_longlong_t offset)
  {
  	cell_t ci[7];
  
  	ci[0] = p1275_ptr2cell("seek");		/* Service name */
  	ci[1] = (cell_t)3;			/* #argument cells */
  	ci[2] = (cell_t)1;			/* #result cells */
  	ci[3] = p1275_ihandle2cell(fd);		/* Arg1: ihandle */
  	ci[4] = p1275_ull2cell_high(offset);	/* Arg2: pos.hi */
  	ci[5] = p1275_ull2cell_low(offset);	/* Arg3: pos.lo */
  	ci[6] = (cell_t)-1;			/* Res1: Prime result */
  
  	(void) p1275_cif_handler(&ci);
  
  	return (p1275_cell2int(ci[6]));		/* Res1: actual */
  }
  
  uint32_t
  prom_read(ihandle_t fd, caddr_t buf, uint32_t len)
  {
  	cell_t ci[7];
  
  	ci[0] = p1275_ptr2cell("read");		/* Service name */
  	ci[1] = (cell_t)3;			/* #argument cells */
  	ci[2] = (cell_t)1;			/* #result cells */
  	ci[3] = p1275_ihandle2cell(fd);		/* Arg1: ihandle */
  	ci[4] = p1275_ptr2cell(buf);		/* Arg2: buffer address */
  	ci[5] = p1275_uint2cell(len);		/* Arg3: buffer length */
  	ci[6] = (cell_t)-1;			/* Res1: Prime result */
  
  	(void) p1275_cif_handler(&ci);
  
  	return (p1275_cell2uint(ci[6]));	/* Res1: actual length */
  }
  
  uint32_t
  prom_write(ihandle_t fd, caddr_t buf, uint32_t len)
  {
  	cell_t ci[7];
  
  	ci[0] = p1275_ptr2cell("write");	/* Service name */
  	ci[1] = (cell_t)3;			/* #argument cells */
  	ci[2] = (cell_t)1;			/* #result cells */
  	ci[3] = p1275_ihandle2cell(fd);		/* Arg1: ihandle */
  	ci[4] = p1275_ptr2cell(buf);		/* Arg2: buffer address */
  	ci[5] = p1275_uint2cell(len);		/* Arg3: buffer length */
  	ci[6] = (cell_t)-1;			/* Res1: Prime result */
  
  	(void) p1275_cif_handler(&ci);
  
  	return (p1275_cell2uint(ci[6]));	/* Res1: actual length */
  }
  
  int
  prom_close(ihandle_t fd)
  {
  	cell_t ci[4];
  
  	ci[0] = p1275_ptr2cell("close");	/* Service name */
  	ci[1] = (cell_t)1;			/* #argument cells */
  	ci[2] = (cell_t)0;			/* #result cells */
  	ci[3] = p1275_ihandle2cell(fd);		/* Arg1: ihandle */
  
  	(void) p1275_cif_handler(&ci);
  
  	return (0);
  }
  

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