| 1 | /*-␊ |
| 2 | * Copyright (c) 2005-2009 Jung-uk Kim <jkim@FreeBSD.org>␊ |
| 3 | * All rights reserved.␊ |
| 4 | *␊ |
| 5 | * Redistribution and use in source and binary forms, with or without␊ |
| 6 | * modification, are permitted provided that the following conditions␊ |
| 7 | * are met:␊ |
| 8 | * 1. Redistributions of source code must retain the above copyright␊ |
| 9 | * notice, this list of conditions and the following disclaimer.␊ |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright␊ |
| 11 | * notice, this list of conditions and the following disclaimer in the␊ |
| 12 | * documentation and/or other materials provided with the distribution.␊ |
| 13 | *␊ |
| 14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND␊ |
| 15 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE␊ |
| 16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE␊ |
| 17 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE␊ |
| 18 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL␊ |
| 19 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS␊ |
| 20 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)␊ |
| 21 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT␊ |
| 22 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY␊ |
| 23 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF␊ |
| 24 | * SUCH DAMAGE.␊ |
| 25 | */␊ |
| 26 | ␊ |
| 27 | /*␊ |
| 28 | * Detect SMBIOS and export information about the SMBIOS into the␊ |
| 29 | * environment.␊ |
| 30 | *␊ |
| 31 | * System Management BIOS Reference Specification, v2.6 Final␊ |
| 32 | * http://www.dmtf.org/standards/published_documents/DSP0134_2.6.0.pdf␊ |
| 33 | */␊ |
| 34 | ␊ |
| 35 | /*␊ |
| 36 | * 2.1.1 SMBIOS Structure Table Entry Point␊ |
| 37 | *␊ |
| 38 | * "On non-EFI systems, the SMBIOS Entry Point structure, described below, can␊ |
| 39 | * be located by application software by searching for the anchor-string on␊ |
| 40 | * paragraph (16-byte) boundaries within the physical memory address range␊ |
| 41 | * 000F0000h to 000FFFFFh. This entry point encapsulates an intermediate anchor␊ |
| 42 | * string that is used by some existing DMI browsers."␊ |
| 43 | */␊ |
| 44 | ␊ |
| 45 | #include "libsaio.h"␊ |
| 46 | ␊ |
| 47 | #define SMBIOS_START 0xf0000␊ |
| 48 | #define SMBIOS_LENGTH 0x10000␊ |
| 49 | #define SMBIOS_STEP 0x10␊ |
| 50 | #define SMBIOS_SIG "_SM_"␊ |
| 51 | #define SMBIOS_DMI_SIG "_DMI_"␊ |
| 52 | ␊ |
| 53 | #define SMBIOS_GET8(base, off) (*(uint8_t *)((base) + (off)))␊ |
| 54 | #define SMBIOS_GET16(base, off) (*(uint16_t *)((base) + (off)))␊ |
| 55 | #define SMBIOS_GET32(base, off) (*(uint32_t *)((base) + (off)))␊ |
| 56 | ␊ |
| 57 | #define SMBIOS_GETLEN(base) SMBIOS_GET8(base, 0x01)␊ |
| 58 | #define SMBIOS_GETSTR(base) ((base) + SMBIOS_GETLEN(base))␊ |
| 59 | ␊ |
| 60 | static uint32_t smbios_enabled_memory = 0;␊ |
| 61 | static uint32_t smbios_old_enabled_memory = 0;␊ |
| 62 | static uint8_t smbios_enabled_sockets = 0;␊ |
| 63 | static uint8_t smbios_populated_sockets = 0;␊ |
| 64 | typedef char* caddr_t;␊ |
| 65 | ␊ |
| 66 | static uint8_t␊ |
| 67 | smbios_checksum(const caddr_t addr, const uint8_t len)␊ |
| 68 | {␊ |
| 69 | ␉uint8_t sum;␊ |
| 70 | ␉int i;␊ |
| 71 | ␉␊ |
| 72 | ␉for (sum = 0, i = 0; i < len; i++)␊ |
| 73 | ␉␉sum += SMBIOS_GET8(addr, i);␊ |
| 74 | ␉return (sum);␊ |
| 75 | }␊ |
| 76 | ␊ |
| 77 | static caddr_t␊ |
| 78 | smbios_sigsearch(const caddr_t addr, const uint32_t len)␊ |
| 79 | {␊ |
| 80 | ␉caddr_t cp;␊ |
| 81 | ␉␊ |
| 82 | ␉/* Search on 16-byte boundaries. */␊ |
| 83 | ␉for (cp = addr; cp < addr + len; cp += SMBIOS_STEP)␊ |
| 84 | ␉␉if (strncmp(cp, SMBIOS_SIG, 4) == 0 &&␊ |
| 85 | ␉␉␉smbios_checksum(cp, SMBIOS_GET8(cp, 0x05)) == 0 &&␊ |
| 86 | ␉␉␉strncmp(cp + 0x10, SMBIOS_DMI_SIG, 5) == 0 &&␊ |
| 87 | ␉␉␉smbios_checksum(cp + 0x10, 0x0f) == 0)␊ |
| 88 | ␉␉␉return (cp);␊ |
| 89 | ␉return (NULL);␊ |
| 90 | }␊ |
| 91 | ␊ |
| 92 | void␊ |
| 93 | smbios_detect(void)␊ |
| 94 | {␊ |
| 95 | ␉char buf[16];␊ |
| 96 | ␉caddr_t addr, dmi, smbios;␊ |
| 97 | ␉size_t count, length;␊ |
| 98 | ␉uint32_t paddr;␊ |
| 99 | ␉int i, major, minor, ver;␊ |
| 100 | ␉␊ |
| 101 | ␉/* Search signatures and validate checksums. */␊ |
| 102 | ␉smbios = smbios_sigsearch(PTOV(SMBIOS_START), SMBIOS_LENGTH);␊ |
| 103 | ␉if (smbios == NULL)␊ |
| 104 | ␉␉return;␊ |
| 105 | ␉␊ |
| 106 | ␉length = SMBIOS_GET16(smbios, 0x16); /* Structure Table Length */␊ |
| 107 | ␉paddr = SMBIOS_GET32(smbios, 0x18); /* Structure Table Address */␊ |
| 108 | ␉count = SMBIOS_GET16(smbios, 0x1c); /* No of SMBIOS Structures */␊ |
| 109 | ␉ver = SMBIOS_GET8(smbios, 0x1e); /* SMBIOS BCD Revision */␊ |
| 110 | ␉␊ |
| 111 | ␉if (ver != 0) {␊ |
| 112 | ␉␉major = ver >> 4;␊ |
| 113 | ␉␉minor = ver & 0x0f;␊ |
| 114 | ␉␉if (major > 9 || minor > 9)␊ |
| 115 | ␉␉␉ver = 0;␊ |
| 116 | ␉}␊ |
| 117 | ␉if (ver == 0) {␊ |
| 118 | ␉␉major = SMBIOS_GET8(smbios, 0x06); /* SMBIOS Major Version */␊ |
| 119 | ␉␉minor = SMBIOS_GET8(smbios, 0x07); /* SMBIOS Minor Version */␊ |
| 120 | ␉}␊ |
| 121 | ␉ver = (major << 8) | minor;␊ |
| 122 | ␉␊ |
| 123 | ␉addr = PTOV(paddr);␊ |
| 124 | ␉for (dmi = addr, i = 0; dmi < addr + length && i < count; i++)␊ |
| 125 | ␉␉dmi = smbios_parse_table(dmi, ver);␊ |
| 126 | ␉␊ |
| 127 | ␉sprintf(buf, "%d.%d", major, minor);␊ |
| 128 | ␉setenv("smbios.version", buf, 1);␊ |
| 129 | ␉if (smbios_enabled_memory > 0 || smbios_old_enabled_memory > 0) {␊ |
| 130 | ␉␉sprintf(buf, "%u", smbios_enabled_memory > 0 ?␊ |
| 131 | ␉␉␉␉336 smbios_enabled_memory : smbios_old_enabled_memory);␊ |
| 132 | ␉␉setenv("smbios.memory.enabled", buf, 1);␊ |
| 133 | ␉}␊ |
| 134 | ␉if (smbios_enabled_sockets > 0) {␊ |
| 135 | ␉␉sprintf(buf, "%u", smbios_enabled_sockets);␊ |
| 136 | ␉␉setenv("smbios.socket.enabled", buf, 1);␊ |
| 137 | ␉}␊ |
| 138 | ␉if (smbios_populated_sockets > 0) {␊ |
| 139 | ␉␉sprintf(buf, "%u", smbios_populated_sockets);␊ |
| 140 | ␉␉setenv("smbios.socket.populated", buf, 1);␊ |
| 141 | ␉}␊ |
| 142 | }␊ |
| 143 | |
