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 /* 24 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 28 #pragma ident "%Z%%M% %I% %E% SMI" 29 30 /* 31 * Platform-Specific SMBIOS Subroutines 32 * 33 * The routines in this file form part of <sys/smbios_impl.h> and combine with 34 * the usr/src/common/smbios code to form an in-kernel SMBIOS decoding service. 35 * The SMBIOS entry point is locating by scanning a range of physical memory 36 * assigned to BIOS as described in Section 2 of the DMTF SMBIOS specification. 37 */ 38 39 #include <sys/smbios_impl.h> 40 #include <sys/sysmacros.h> 41 #include <sys/errno.h> 42 #include <sys/psm.h> 43 #include <sys/smp_impldefs.h> 44 45 smbios_hdl_t *ksmbios; 46 int ksmbios_flags; 47 48 smbios_hdl_t * 49 smb_open_error(smbios_hdl_t *shp, int *errp, int err) 50 { 51 if (shp != NULL) 52 smbios_close(shp); 53 54 if (errp != NULL) 55 *errp = err; 56 57 if (ksmbios == NULL) 58 cmn_err(CE_CONT, "?SMBIOS not loaded (%s)", smbios_errmsg(err)); 59 60 return (NULL); 61 } 62 63 smbios_hdl_t * 64 smbios_open(const char *file, int version, int flags, int *errp) 65 { 66 smbios_hdl_t *shp = NULL; 67 smbios_entry_t ep; 68 caddr_t stbuf, bios, p, q; 69 size_t bioslen; 70 int err; 71 72 if (file != NULL || (flags & ~SMB_O_MASK)) 73 return (smb_open_error(shp, errp, ESMB_INVAL)); 74 75 bioslen = SMB_RANGE_LIMIT - SMB_RANGE_START + 1; 76 bios = psm_map_phys(SMB_RANGE_START, bioslen, PSM_PROT_READ); 77 78 if (bios == NULL) 79 return (smb_open_error(shp, errp, ESMB_MAPDEV)); 80 81 for (p = bios, q = bios + bioslen; p < q; p += 16) { 82 if (strncmp(p, SMB_ENTRY_EANCHOR, SMB_ENTRY_EANCHORLEN) == 0) 83 break; 84 } 85 86 if (p >= q) { 87 psm_unmap_phys(bios, bioslen); 88 return (smb_open_error(shp, errp, ESMB_NOTFOUND)); 89 } 90 91 bcopy(p, &ep, sizeof (smbios_entry_t)); 92 psm_unmap_phys(bios, bioslen); 93 bios = psm_map_phys(ep.smbe_staddr, ep.smbe_stlen, PSM_PROT_READ); 94 95 if (bios == NULL) 96 return (smb_open_error(shp, errp, ESMB_MAPDEV)); 97 98 stbuf = smb_alloc(ep.smbe_stlen); 99 bcopy(bios, stbuf, ep.smbe_stlen); 100 psm_unmap_phys(bios, ep.smbe_stlen); 101 shp = smbios_bufopen(&ep, stbuf, ep.smbe_stlen, version, flags, &err); 102 103 if (shp == NULL) { 104 smb_free(stbuf, ep.smbe_stlen); 105 return (smb_open_error(shp, errp, err)); 106 } 107 108 if (ksmbios == NULL) { 109 cmn_err(CE_CONT, "?SMBIOS v%u.%u loaded (%u bytes)", 110 ep.smbe_major, ep.smbe_minor, ep.smbe_stlen); 111 } 112 113 shp->sh_flags |= SMB_FL_BUFALLOC; 114 return (shp); 115 } 116 117 /*ARGSUSED*/ 118 smbios_hdl_t * 119 smbios_fdopen(int fd, int version, int flags, int *errp) 120 { 121 return (smb_open_error(NULL, errp, ENOTSUP)); 122 } 123 124 /*ARGSUSED*/ 125 int 126 smbios_write(smbios_hdl_t *shp, int fd) 127 { 128 return (smb_set_errno(shp, ENOTSUP)); 129 } 130