1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 1991-1994, by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <sys/promif.h> 30 #include <sys/promimpl.h> 31 32 /* 33 * Mapping routines suitable for implementations using 2-cell physical 34 * address formats. Use of these routines makes the caller 35 * platform-dependent. The implementation of these routines is 36 * a bit sun-hardware centric, for historical use by SunOS and standalones. 37 */ 38 39 caddr_t 40 prom_map(caddr_t virthint, unsigned long long physaddr, u_int size) 41 { 42 caddr_t virt; 43 44 /* 45 * If no virthint, allocate it; otherwise claim it, 46 * the physical address is assumed to be a device or 47 * already claimed, or not appearing in a resource list. 48 */ 49 if (virthint == (caddr_t)0) { 50 if ((virt = prom_allocate_virt((u_int)1, size)) == 0) 51 return ((caddr_t)0); 52 } else { 53 virt = virthint; 54 if (prom_claim_virt(size, virt) != virt) 55 return ((caddr_t)0); 56 } 57 58 if (prom_map_phys(-1, size, virt, physaddr) != 0) { 59 /* 60 * The map operation failed, free the virtual 61 * addresses we allocated or claimed. 62 */ 63 (void) prom_free_virt(size, virt); 64 return ((caddr_t)0); 65 } 66 return (virt); 67 } 68 69 void 70 prom_unmap(caddr_t virt, u_int size) 71 { 72 (void) prom_unmap_virt(size, virt); 73 prom_free_virt(size, virt); 74 } 75