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 2006 Sun Microsystems, Inc. All rights reserved. 25 * Use is subject to license terms. 26 */ 27 28 /* 29 * Platform-Specific SMBIOS Subroutines 30 * 31 * The routines in this file form part of <sys/smbios_impl.h> and combine with 32 * the usr/src/common/smbios code to form an in-kernel SMBIOS decoding service. 33 * The SMBIOS entry point is locating by scanning a range of physical memory 34 * assigned to BIOS as described in Section 2 of the DMTF SMBIOS specification. 35 */ 36 37 #include <sys/smbios_impl.h> 38 #include <sys/sysmacros.h> 39 #include <sys/errno.h> 40 #include <sys/psm.h> 41 #include <sys/smp_impldefs.h> 42 43 smbios_hdl_t *ksmbios; 44 int ksmbios_flags; 45 46 smbios_hdl_t * 47 smb_open_error(smbios_hdl_t *shp, int *errp, int err) 48 { 49 if (shp != NULL) 50 smbios_close(shp); 51 52 if (errp != NULL) 53 *errp = err; 54 55 if (ksmbios == NULL) 56 cmn_err(CE_CONT, "?SMBIOS not loaded (%s)", smbios_errmsg(err)); 57 58 return (NULL); 59 } 60 61 smbios_hdl_t * 62 smbios_open(const char *file, int version, int flags, int *errp) 63 { 64 smbios_hdl_t *shp = NULL; 65 smbios_entry_t *ep; 66 caddr_t stbuf, bios, p, q; 67 size_t bioslen; 68 int err; 69 70 if (file != NULL || (flags & ~SMB_O_MASK)) 71 return (smb_open_error(shp, errp, ESMB_INVAL)); 72 73 bioslen = SMB_RANGE_LIMIT - SMB_RANGE_START + 1; 74 bios = psm_map_phys(SMB_RANGE_START, bioslen, PSM_PROT_READ); 75 76 if (bios == NULL) 77 return (smb_open_error(shp, errp, ESMB_MAPDEV)); 78 79 for (p = bios, q = bios + bioslen; p < q; p += 16) { 80 if (strncmp(p, SMB_ENTRY_EANCHOR, SMB_ENTRY_EANCHORLEN) == 0) 81 break; 82 } 83 84 if (p >= q) { 85 psm_unmap_phys(bios, bioslen); 86 return (smb_open_error(shp, errp, ESMB_NOTFOUND)); 87 } 88 89 ep = smb_alloc(SMB_ENTRY_MAXLEN); 90 bcopy(p, ep, sizeof (smbios_entry_t)); 91 ep->smbe_elen = MIN(ep->smbe_elen, SMB_ENTRY_MAXLEN); 92 bcopy(p, ep, ep->smbe_elen); 93 94 psm_unmap_phys(bios, bioslen); 95 bios = psm_map_phys(ep->smbe_staddr, ep->smbe_stlen, PSM_PROT_READ); 96 97 if (bios == NULL) { 98 smb_free(ep, SMB_ENTRY_MAXLEN); 99 return (smb_open_error(shp, errp, ESMB_MAPDEV)); 100 } 101 102 stbuf = smb_alloc(ep->smbe_stlen); 103 bcopy(bios, stbuf, ep->smbe_stlen); 104 psm_unmap_phys(bios, ep->smbe_stlen); 105 shp = smbios_bufopen(ep, stbuf, ep->smbe_stlen, version, flags, &err); 106 107 if (shp == NULL) { 108 smb_free(stbuf, ep->smbe_stlen); 109 smb_free(ep, SMB_ENTRY_MAXLEN); 110 return (smb_open_error(shp, errp, err)); 111 } 112 113 if (ksmbios == NULL) { 114 cmn_err(CE_CONT, "?SMBIOS v%u.%u loaded (%u bytes)", 115 ep->smbe_major, ep->smbe_minor, ep->smbe_stlen); 116 if (shp->sh_flags & SMB_FL_TRUNC) 117 cmn_err(CE_CONT, "?SMBIOS table is truncated"); 118 } 119 120 shp->sh_flags |= SMB_FL_BUFALLOC; 121 smb_free(ep, SMB_ENTRY_MAXLEN); 122 123 return (shp); 124 } 125 126 /*ARGSUSED*/ 127 smbios_hdl_t * 128 smbios_fdopen(int fd, int version, int flags, int *errp) 129 { 130 return (smb_open_error(NULL, errp, ENOTSUP)); 131 } 132 133 /*ARGSUSED*/ 134 int 135 smbios_write(smbios_hdl_t *shp, int fd) 136 { 137 return (smb_set_errno(shp, ENOTSUP)); 138 } 139