/* * Copyright (c) 2005-2009 Jung-uk Kim * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #include #include #include "smbios.h" /* * Detect SMBIOS and export information about the SMBIOS into the * environment. * * System Management BIOS Reference Specification, v2.6 Final * http://www.dmtf.org/standards/published_documents/DSP0134_2.6.0.pdf * System Management BIOS (SMBIOS) Reference Specification, v3.1.0 * http://www.dmtf.org/sites/default/files/standards/documents/DSP0134_3.1.0.pdf */ /* * 2.1.1 SMBIOS Structure Table Entry Point * * "On non-EFI systems, the SMBIOS Entry Point structure, described below, can * be located by application software by searching for the anchor-string on * paragraph (16-byte) boundaries within the physical memory address range * 000F0000h to 000FFFFFh. This entry point encapsulates an intermediate anchor * string that is used by some existing DMI browsers." */ #define SMBIOS_START 0xf0000 #define SMBIOS_LENGTH 0x10000 #define SMBIOS_STEP 0x10 #define SMBIOS_SIG "_SM_" #define SMBIOS_SIG_LEN (4) #define SMBIOS3_SIG "_SM3_" #define SMBIOS3_SIG_LEN (5) #define SMBIOS_DMI_SIG "_DMI_" #define SMBIOS_DMI_SIG_LEN (5) #define SMBIOS_GET8(base, off) (*(uint8_t *)((base) + (off))) #define SMBIOS_GET16(base, off) (*(uint16_t *)((base) + (off))) #define SMBIOS_GET32(base, off) (*(uint32_t *)((base) + (off))) #define SMBIOS_GET64(base, off) (*(uint64_t *)((base) + (off))) #define SMBIOS_GETLEN(base) SMBIOS_GET8(base, 0x01) #define SMBIOS_GETSTR(base) ((base) + SMBIOS_GETLEN(base)) struct smbios_attr { int probed; caddr_t addr; size_t length; size_t count; int major; int minor; int ver; const char* bios_vendor; const char* maker; const char* product; uint32_t enabled_memory; uint32_t old_enabled_memory; uint8_t enabled_sockets; uint8_t populated_sockets; }; static struct smbios_attr smbios; static uint8_t smbios_checksum(const caddr_t addr, const uint8_t len) { uint8_t sum; int i; for (sum = 0, i = 0; i < len; i++) sum += SMBIOS_GET8(addr, i); return (sum); } static caddr_t smbios_sigsearch(const caddr_t addr, const uint32_t len) { caddr_t cp; uintptr_t paddr; /* Search on 16-byte boundaries. */ for (cp = addr; cp < addr + len; cp += SMBIOS_STEP) { if (strncmp(cp, SMBIOS_SIG, SMBIOS_SIG_LEN) == 0 && smbios_checksum(cp, SMBIOS_GET8(cp, 0x05)) == 0 && strncmp(cp + 0x10, SMBIOS_DMI_SIG, SMBIOS_DMI_SIG_LEN) == 0 && smbios_checksum(cp + 0x10, 0x0f) == 0) { /* Structure Table Length */ smbios.length = SMBIOS_GET16(cp, 0x16); /* Structure Table Address */ paddr = SMBIOS_GET32(cp, 0x18); /* No of SMBIOS Structures */ smbios.count = SMBIOS_GET16(cp, 0x1c); /* SMBIOS BCD Revision */ smbios.ver = SMBIOS_GET8(cp, 0x1e); if (smbios.ver != 0) { smbios.major = smbios.ver >> 4; smbios.minor = smbios.ver & 0x0f; if (smbios.major > 9 || smbios.minor > 9) smbios.ver = 0; } if (smbios.ver == 0) { /* SMBIOS Major Version */ smbios.major = SMBIOS_GET8(cp, 0x06); /* SMBIOS Minor Version */ smbios.minor = SMBIOS_GET8(cp, 0x07); } smbios.ver = (smbios.major << 8) | smbios.minor; smbios.addr = ptov(paddr); return (cp); } #ifdef _LP64 /* * Check for the SMBIOS 64-bit entry point introduced in * version 3.0. * * The table address is a 64-bit physical address that may * appear at any 64-bit address. We only search for * the 64-bit entry point when running a 64-bit application. */ if (strncmp(cp, SMBIOS3_SIG, SMBIOS3_SIG_LEN) == 0 && smbios_checksum(cp, SMBIOS_GET8(cp, 0x06)) == 0) { /* SMBIOS Major Version */ smbios.major = SMBIOS_GET8(cp, 0x07); /* SMBIOS Minor Version */ smbios.minor = SMBIOS_GET8(cp, 0x08); /* Entry Point Revision */ smbios.ver = SMBIOS_GET8(cp, 0x0a); /* Structure Table maximum size */ smbios.length = SMBIOS_GET32(cp, 0x0c); /* Structure Table Address */ paddr = SMBIOS_GET64(cp, 0x10); smbios.addr = ptov(paddr); /* * Calculate upper limit for structure count, * use size of table header (4 bytes). */ smbios.count = smbios.length / 4; return (cp); } #endif } return (NULL); } static const char* smbios_getstring(caddr_t addr, const int offset) { caddr_t cp; int i, idx; idx = SMBIOS_GET8(addr, offset); if (idx != 0) { cp = SMBIOS_GETSTR(addr); for (i = 1; i < idx; i++) cp += strlen(cp) + 1; return cp; } return (NULL); } static void smbios_setenv(const char *name, caddr_t addr, const int offset) { const char* val; val = smbios_getstring(addr, offset); if (val != NULL) setenv(name, val, 1); } #ifdef SMBIOS_SERIAL_NUMBERS #define UUID_SIZE 16 #define UUID_TYPE uint32_t #define UUID_STEP sizeof(UUID_TYPE) #define UUID_ALL_BITS (UUID_SIZE / UUID_STEP) #define UUID_GET(base, off) (*(UUID_TYPE *)((base) + (off))) static void smbios_setuuid(const char *name, const caddr_t addr) { char uuid[37]; int byteorder, i, ones, zeros; UUID_TYPE n; uint32_t f1; uint16_t f2, f3; for (i = 0, ones = 0, zeros = 0; i < UUID_SIZE; i += UUID_STEP) { n = UUID_GET(addr, i) + 1; if (zeros == 0 && n == 0) ones++; else if (ones == 0 && n == 1) zeros++; else break; } if (ones != UUID_ALL_BITS && zeros != UUID_ALL_BITS) { /* * 3.3.2.1 System UUID * * "Although RFC 4122 recommends network byte order for all * fields, the PC industry (including the ACPI, UEFI, and * Microsoft specifications) has consistently used * little-endian byte encoding for the first three fields: * time_low, time_mid, time_hi_and_version. The same encoding, * also known as wire format, should also be used for the * SMBIOS representation of the UUID." * * Note: We use network byte order for backward compatibility * unless SMBIOS version is 2.6+ or little-endian is forced. */ #if defined(SMBIOS_LITTLE_ENDIAN_UUID) byteorder = LITTLE_ENDIAN; #elif defined(SMBIOS_NETWORK_ENDIAN_UUID) byteorder = BIG_ENDIAN; #else byteorder = ver < 0x0206 ? BIG_ENDIAN : LITTLE_ENDIAN; #endif if (byteorder != LITTLE_ENDIAN) { f1 = ntohl(SMBIOS_GET32(addr, 0)); f2 = ntohs(SMBIOS_GET16(addr, 4)); f3 = ntohs(SMBIOS_GET16(addr, 6)); } else { f1 = le32toh(SMBIOS_GET32(addr, 0)); f2 = le16toh(SMBIOS_GET16(addr, 4)); f3 = le16toh(SMBIOS_GET16(addr, 6)); } sprintf(uuid, "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x", f1, f2, f3, SMBIOS_GET8(addr, 8), SMBIOS_GET8(addr, 9), SMBIOS_GET8(addr, 10), SMBIOS_GET8(addr, 11), SMBIOS_GET8(addr, 12), SMBIOS_GET8(addr, 13), SMBIOS_GET8(addr, 14), SMBIOS_GET8(addr, 15)); setenv(name, uuid, 1); } } #undef UUID_SIZE #undef UUID_TYPE #undef UUID_STEP #undef UUID_ALL_BITS #undef UUID_GET #endif static caddr_t smbios_parse_table(const caddr_t addr) { caddr_t cp; int proc, size, osize, type; type = SMBIOS_GET8(addr, 0); /* 3.1.2 Structure Header Format */ switch(type) { case 0: /* 3.3.1 BIOS Information (Type 0) */ smbios_setenv("smbios.bios.vendor", addr, 0x04); smbios_setenv("smbios.bios.version", addr, 0x05); smbios_setenv("smbios.bios.reldate", addr, 0x08); break; case 1: /* 3.3.2 System Information (Type 1) */ smbios_setenv("smbios.system.maker", addr, 0x04); smbios_setenv("smbios.system.product", addr, 0x05); smbios_setenv("smbios.system.version", addr, 0x06); #ifdef SMBIOS_SERIAL_NUMBERS smbios_setenv("smbios.system.serial", addr, 0x07); smbios_setuuid("smbios.system.uuid", addr + 0x08); #endif if (smbios.major > 2 || (smbios.major == 2 && smbios.minor >= 4)) { smbios_setenv("smbios.system.sku", addr, 0x19); smbios_setenv("smbios.system.family", addr, 0x1a); } break; case 2: /* 3.3.3 Base Board (or Module) Information (Type 2) */ smbios_setenv("smbios.planar.maker", addr, 0x04); smbios_setenv("smbios.planar.product", addr, 0x05); smbios_setenv("smbios.planar.version", addr, 0x06); #ifdef SMBIOS_SERIAL_NUMBERS smbios_setenv("smbios.planar.serial", addr, 0x07); smbios_setenv("smbios.planar.tag", addr, 0x08); #endif smbios_setenv("smbios.planar.location", addr, 0x0a); break; case 3: /* 3.3.4 System Enclosure or Chassis (Type 3) */ smbios_setenv("smbios.chassis.maker", addr, 0x04); smbios_setenv("smbios.chassis.version", addr, 0x06); #ifdef SMBIOS_SERIAL_NUMBERS smbios_setenv("smbios.chassis.serial", addr, 0x07); smbios_setenv("smbios.chassis.tag", addr, 0x08); #endif break; case 4: /* 3.3.5 Processor Information (Type 4) */ /* * Offset 18h: Processor Status * * Bit 7 Reserved, must be 0 * Bit 6 CPU Socket Populated * 1 - CPU Socket Populated * 0 - CPU Socket Unpopulated * Bit 5:3 Reserved, must be zero * Bit 2:0 CPU Status * 0h - Unknown * 1h - CPU Enabled * 2h - CPU Disabled by User via BIOS Setup * 3h - CPU Disabled by BIOS (POST Error) * 4h - CPU is Idle, waiting to be enabled * 5-6h - Reserved * 7h - Other */ proc = SMBIOS_GET8(addr, 0x18); if ((proc & 0x07) == 1) smbios.enabled_sockets++; if ((proc & 0x40) != 0) smbios.populated_sockets++; break; case 6: /* 3.3.7 Memory Module Information (Type 6, Obsolete) */ /* * Offset 0Ah: Enabled Size * * Bit 7 Bank connection * 1 - Double-bank connection * 0 - Single-bank connection * Bit 6:0 Size (n), where 2**n is the size in MB * 7Dh - Not determinable (Installed Size only) * 7Eh - Module is installed, but no memory * has been enabled * 7Fh - Not installed */ osize = SMBIOS_GET8(addr, 0x0a) & 0x7f; if (osize > 0 && osize < 22) smbios.old_enabled_memory += 1 << (osize + 10); break; case 17: /* 3.3.18 Memory Device (Type 17) */ /* * Offset 0Ch: Size * * Bit 15 Granularity * 1 - Value is in kilobytes units * 0 - Value is in megabytes units * Bit 14:0 Size */ size = SMBIOS_GET16(addr, 0x0c); if (size != 0 && size != 0xffff) smbios.enabled_memory += (size & 0x8000) != 0 ? (size & 0x7fff) : (size << 10); break; default: /* skip other types */ break; } /* Find structure terminator. */ cp = SMBIOS_GETSTR(addr); while (SMBIOS_GET16(cp, 0) != 0) cp++; return (cp + 2); } static caddr_t smbios_find_struct(int type) { caddr_t dmi; size_t i; if (smbios.addr == NULL) return (NULL); for (dmi = smbios.addr, i = 0; dmi < smbios.addr + smbios.length && i < smbios.count; i++) { if (SMBIOS_GET8(dmi, 0) == type) return dmi; /* Find structure terminator. */ dmi = SMBIOS_GETSTR(dmi); while (SMBIOS_GET16(dmi, 0) != 0) dmi++; dmi += 2; } return (NULL); } static void smbios_probe(const caddr_t addr) { caddr_t info; const caddr_t paddr = addr != NULL ? addr : ptov(SMBIOS_START); if (smbios.probed) return; smbios.probed = 1; /* Search signatures and validate checksums. */ if (smbios_sigsearch(paddr, SMBIOS_LENGTH) == NULL) return; /* Get system information from SMBIOS */ info = smbios_find_struct(0x00); if (info != NULL) { smbios.bios_vendor = smbios_getstring(info, 0x04); } info = smbios_find_struct(0x01); if (info != NULL) { smbios.maker = smbios_getstring(info, 0x04); smbios.product = smbios_getstring(info, 0x05); } } void smbios_detect(const caddr_t addr) { char buf[16]; caddr_t dmi; size_t i; smbios_probe(addr); if (smbios.addr == NULL) return; for (dmi = smbios.addr, i = 0; dmi < smbios.addr + smbios.length && i < smbios.count; i++) dmi = smbios_parse_table(dmi); sprintf(buf, "%d.%d", smbios.major, smbios.minor); setenv("smbios.version", buf, 1); if (smbios.enabled_memory > 0 || smbios.old_enabled_memory > 0) { sprintf(buf, "%u", smbios.enabled_memory > 0 ? smbios.enabled_memory : smbios.old_enabled_memory); setenv("smbios.memory.enabled", buf, 1); } if (smbios.enabled_sockets > 0) { sprintf(buf, "%u", smbios.enabled_sockets); setenv("smbios.socket.enabled", buf, 1); } if (smbios.populated_sockets > 0) { sprintf(buf, "%u", smbios.populated_sockets); setenv("smbios.socket.populated", buf, 1); } } static int smbios_match_str(const char* s1, const char* s2) { return (s1 == NULL || (s2 != NULL && !strcmp(s1, s2))); } int smbios_match(const char* bios_vendor, const char* maker, const char* product) { /* XXXRP currently, only called from non-EFI. */ smbios_probe(NULL); return (smbios_match_str(bios_vendor, smbios.bios_vendor) && smbios_match_str(maker, smbios.maker) && smbios_match_str(product, smbios.product)); }