/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 1994, by Sun Microsystems, Inc.
 * All rights reserved.
 */

#pragma ident   "%Z%%M% %I%     %E% SMI"

#include <sys/promif.h>
#include <sys/promimpl.h>

/*
 * Allocate retained physical memory
 * Returns 0: Success; Non-zero: failure.
 * Returns *phys_hi, *phys_lo only if successful.
 */
int
prom_retain(char *id, size_t size, u_int align, unsigned long long *physaddr)
{
        cell_t ci[11];
        int rv;
        ihandle_t imemory = prom_memory_ihandle();

        if ((imemory == (ihandle_t)-1))
                return (-1);

        ci[0] = p1275_ptr2cell("call-method");  /* Service name */
        ci[1] = (cell_t)5;                      /* #argument cells */
        ci[2] = (cell_t)3;                      /* #result cells */
        ci[3] = p1275_ptr2cell("SUNW,retain");  /* Arg1: Method name */
        ci[4] = p1275_ihandle2cell(imemory);    /* Arg2: memory ihandle */
        ci[5] = p1275_uint2cell(align);         /* Arg2: SA1: align */
        ci[6] = p1275_size2cell(size);          /* Arg3: SA2: size */
        ci[7] = p1275_ptr2cell(id);             /* Arg4: SA3: id name */

        promif_preprom();
        rv = p1275_cif_handler(&ci);
        promif_postprom();

        if (rv != 0)
                return (rv);            /* Service "call-method" failed */
        if (ci[8] != 0)                 /* Res1: catch-result */
                return (-1);            /* Method "SUNW,retain" failed */

        *physaddr = p1275_cells2ull(ci[9], ci[10]);
                                        /* Res3: base.hi, Res4: base.lo */
        return (0);
}