2 * Copyright (c) 1996, by Steve Passe
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. The name of the developer may NOT be used to endorse or promote products
11 * derived from this software without specific prior written permission.
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 static const char rcsid[] =
36 * this will cause the raw mp table to be dumped to /tmp/mpdump
41 #define MP_SIG 0x5f504d5f /* _MP_ */
42 #define EXTENDED_PROCESSING_READY
43 #define OEM_PROCESSING_READY_NOT
45 #include <sys/types.h>
55 "\n-------------------------------------------------------------------------------\n"
58 "\n===============================================================================\n"
60 /* EBDA is @ 40:0e in real-mode terms */
61 #define EBDA_POINTER 0x040e /* location of EBDA pointer */
63 /* CMOS 'top of mem' is @ 40:13 in real-mode terms */
64 #define TOPOFMEM_POINTER 0x0413 /* BIOS: base memory size */
66 #define DEFAULT_TOPOFMEM 0xa0000
68 #define BIOS_BASE 0xf0000
69 #define BIOS_BASE2 0xe0000
70 #define BIOS_SIZE 0x10000
71 #define ONE_KBYTE 1024
73 #define GROPE_AREA1 0x80000
74 #define GROPE_AREA2 0x90000
75 #define GROPE_SIZE 0x10000
77 #define PROCENTRY_FLAG_EN 0x01
78 #define PROCENTRY_FLAG_BP 0x02
79 #define IOAPICENTRY_FLAG_EN 0x01
91 UNKNOWN_BUSTYPE = 0xff
94 typedef struct BUSTYPENAME {
99 static busTypeName busTypeTable[] =
102 { CBUSII, "CBUSII" },
104 { UNKNOWN_BUSTYPE, "---" },
105 { UNKNOWN_BUSTYPE, "---" },
107 { UNKNOWN_BUSTYPE, "---" },
108 { UNKNOWN_BUSTYPE, "---" },
109 { UNKNOWN_BUSTYPE, "---" },
110 { UNKNOWN_BUSTYPE, "---" },
111 { UNKNOWN_BUSTYPE, "---" },
112 { UNKNOWN_BUSTYPE, "---" },
114 { UNKNOWN_BUSTYPE, "---" },
115 { UNKNOWN_BUSTYPE, "---" },
116 { UNKNOWN_BUSTYPE, "---" },
117 { UNKNOWN_BUSTYPE, "---" },
118 { UNKNOWN_BUSTYPE, "---" },
119 { UNKNOWN_BUSTYPE, "---" }
122 const char* whereStrings[] = {
123 "Extended BIOS Data Area",
124 "BIOS top of memory",
125 "Default top of memory",
132 typedef struct TABLE_ENTRY {
138 tableEntry basetableEntryTypes[] =
140 { 0, 20, "Processor" },
142 { 2, 8, "I/O APIC" },
144 { 4, 8, "Local INT" }
147 tableEntry extendedtableEntryTypes[] =
149 { 128, 20, "System Address Space" },
150 { 129, 8, "Bus Hierarchy" },
151 { 130, 8, "Compatibility Bus Address" }
154 /* MP Floating Pointer Structure */
155 typedef struct MPFPS {
168 /* MP Configuration Table Header */
169 typedef struct MPCTH {
171 u_short base_table_length;
175 u_char product_id[ 12 ];
176 u_int32_t oem_table_pointer;
177 u_short oem_table_size;
179 u_int32_t apic_address;
180 u_short extended_table_length;
181 u_char extended_table_checksum;
186 typedef struct PROCENTRY {
191 u_int32_t cpuSignature;
192 u_int32_t featureFlags;
197 typedef struct BUSENTRY {
203 typedef struct IOAPICENTRY {
208 u_int32_t apicAddress;
211 typedef struct INTENTRY {
223 * extended entry type structures
226 typedef struct SASENTRY {
231 u_int64_t addressBase;
232 u_int64_t addressLength;
233 } __attribute__((__packed__)) SasEntry;
236 typedef struct BHDENTRY {
242 u_char reserved[ 3 ];
246 typedef struct CBASMENTRY {
251 u_int predefinedRange;
256 static void apic_probe( u_int32_t* paddr, int* where );
258 static void MPConfigDefault( int featureByte );
260 static void MPFloatingPointer( u_int32_t paddr, int where, mpfps_t* mpfps );
261 static void MPConfigTableHeader( u_int32_t pap );
263 static int readType( void );
264 static void seekEntry( u_int32_t addr );
265 static void readEntry( void* entry, int size );
267 static void processorEntry( void );
268 static void busEntry( void );
269 static void ioApicEntry( void );
270 static void intEntry( void );
272 static void sasEntry( void );
273 static void bhdEntry( void );
274 static void cbasmEntry( void );
276 static void doDmesg( void );
277 static void pnstr( char* s, int c );
280 int pfd; /* physical /dev/mem fd */
297 fprintf( stderr, "usage: mptable [-dmesg] [-verbose] [-grope] [-help]\n" );
305 main( int argc, char *argv[] )
314 /* announce ourselves */
317 printf( "MPTable\n" );
319 while ((ch = getopt(argc, argv, "d:g:h:v:")) != -1) {
322 if ( strcmp( optarg, "mesg") == 0 )
328 if ( strcmp( optarg, "elp") == 0 )
332 if ( strcmp( optarg, "rope") == 0 )
336 if ( strcmp( optarg, "erbose") == 0 )
348 /* open physical memory for access to MP structures */
349 if ( (pfd = open( _PATH_MEM, O_RDONLY )) < 0 )
350 err( 1, "mem open" );
352 /* probe for MP structures */
353 apic_probe( &paddr, &where );
355 fprintf( stderr, "\n MP FPS NOT found,\n" );
356 fprintf( stderr, " suggest trying -grope option!!!\n\n" );
361 printf( "\n MP FPS found in %s @ physical addr: 0x%08x\n",
362 whereStrings[ where - 1 ], paddr );
366 /* analyze the MP Floating Pointer Structure */
367 MPFloatingPointer( paddr, where, &mpfps );
371 /* check whether an MP config table exists */
372 if ( (defaultConfig = mpfps.mpfb1) )
373 MPConfigDefault( defaultConfig );
375 MPConfigTableHeader( mpfps.pap );
377 /* do a dmesg output */
388 * set PHYSICAL address of MP floating pointer structure
390 #define NEXT(X) ((X) += 4)
392 apic_probe( u_int32_t* paddr, int* where )
395 * c rewrite of apic_probe() by Jack F. Vogel
401 u_int buffer[ BIOS_SIZE / sizeof( int ) ];
406 /* search Extended Bios Data Area, if present */
408 printf( " looking for EBDA pointer @ 0x%04x, ", EBDA_POINTER );
409 seekEntry( (u_int32_t)EBDA_POINTER );
410 readEntry( &segment, 2 );
411 if ( segment ) { /* search EBDA */
412 target = (u_int32_t)segment << 4;
414 printf( "found, searching EBDA @ 0x%08x\n", target );
416 readEntry( buffer, ONE_KBYTE );
418 for ( x = 0; x < ONE_KBYTE / (int)sizeof ( unsigned int ); NEXT(x) ) {
419 if ( buffer[ x ] == MP_SIG ) {
421 *paddr = (x * sizeof( unsigned int )) + target;
428 printf( "NOT found\n" );
431 /* read CMOS for real top of mem */
432 seekEntry( (u_int32_t)TOPOFMEM_POINTER );
433 readEntry( &segment, 2 );
434 --segment; /* less ONE_KBYTE */
435 target = segment * 1024;
437 printf( " searching CMOS 'top of mem' @ 0x%08x (%dK)\n",
440 readEntry( buffer, ONE_KBYTE );
442 for ( x = 0; x < ONE_KBYTE / (int)sizeof ( unsigned int ); NEXT(x) ) {
443 if ( buffer[ x ] == MP_SIG ) {
445 *paddr = (x * sizeof( unsigned int )) + target;
450 /* we don't necessarily believe CMOS, check base of the last 1K of 640K */
451 if ( target != (DEFAULT_TOPOFMEM - 1024)) {
452 target = (DEFAULT_TOPOFMEM - 1024);
454 printf( " searching default 'top of mem' @ 0x%08x (%dK)\n",
455 target, (target / 1024) );
457 readEntry( buffer, ONE_KBYTE );
459 for ( x = 0; x < ONE_KBYTE / (int)sizeof ( unsigned int ); NEXT(x) ) {
460 if ( buffer[ x ] == MP_SIG ) {
462 *paddr = (x * sizeof( unsigned int )) + target;
468 /* search the BIOS */
470 printf( " searching BIOS @ 0x%08x\n", BIOS_BASE );
471 seekEntry( BIOS_BASE );
472 readEntry( buffer, BIOS_SIZE );
474 for ( x = 0; x < BIOS_SIZE / (int)sizeof( unsigned int ); NEXT(x) ) {
475 if ( buffer[ x ] == MP_SIG ) {
477 *paddr = (x * sizeof( unsigned int )) + BIOS_BASE;
482 /* search the extended BIOS */
484 printf( " searching extended BIOS @ 0x%08x\n", BIOS_BASE2 );
485 seekEntry( BIOS_BASE2 );
486 readEntry( buffer, BIOS_SIZE );
488 for ( x = 0; x < BIOS_SIZE / (int)sizeof( unsigned int ); NEXT(x) ) {
489 if ( buffer[ x ] == MP_SIG ) {
491 *paddr = (x * sizeof( unsigned int )) + BIOS_BASE2;
497 /* search additional memory */
498 target = GROPE_AREA1;
500 printf( " groping memory @ 0x%08x\n", target );
502 readEntry( buffer, GROPE_SIZE );
504 for ( x = 0; x < GROPE_SIZE / (int)sizeof( unsigned int ); NEXT(x) ) {
505 if ( buffer[ x ] == MP_SIG ) {
507 *paddr = (x * sizeof( unsigned int )) + GROPE_AREA1;
512 target = GROPE_AREA2;
514 printf( " groping memory @ 0x%08x\n", target );
516 readEntry( buffer, GROPE_SIZE );
518 for ( x = 0; x < GROPE_SIZE / (int)sizeof( unsigned int ); NEXT(x) ) {
519 if ( buffer[ x ] == MP_SIG ) {
521 *paddr = (x * sizeof( unsigned int )) + GROPE_AREA2;
528 *paddr = (u_int32_t)0;
536 MPFloatingPointer( u_int32_t paddr, int where, mpfps_t* mpfps )
539 /* read in mpfps structure*/
541 readEntry( mpfps, sizeof( mpfps_t ) );
543 /* show its contents */
544 printf( "MP Floating Pointer Structure:\n\n" );
546 printf( " location:\t\t\t" );
553 printf( "BIOS base memory\n" );
556 printf( "DEFAULT base memory (639K)\n" );
562 printf( "Extended BIOS\n" );
566 printf( "NOT found!\n" );
569 printf( "BOGUS!\n" );
572 printf( " physical address:\t\t0x%08x\n", paddr );
574 printf( " signature:\t\t\t'" );
575 pnstr( mpfps->signature, 4 );
578 printf( " length:\t\t\t%d bytes\n", mpfps->length * 16 );
579 printf( " version:\t\t\t1.%1d\n", mpfps->spec_rev );
580 printf( " checksum:\t\t\t0x%02x\n", mpfps->checksum );
582 /* bits 0:6 are RESERVED */
583 if ( mpfps->mpfb2 & 0x7f ) {
584 printf( " warning, MP feature byte 2: 0x%02x\n", mpfps->mpfb2 );
588 printf( " mode:\t\t\t\t%s\n", (mpfps->mpfb2 & 0x80) ?
589 "PIC" : "Virtual Wire" );
591 /* MP feature bytes 3-5 are expected to be ZERO */
593 printf( " warning, MP feature byte 3 NONZERO!\n" );
595 printf( " warning, MP feature byte 4 NONZERO!\n" );
597 printf( " warning, MP feature byte 5 NONZERO!\n" );
605 MPConfigDefault( int featureByte )
607 printf( " MP default config type: %d\n\n", featureByte );
608 switch ( featureByte ) {
610 printf( " bus: ISA, APIC: 82489DX\n" );
613 printf( " bus: EISA, APIC: 82489DX\n" );
616 printf( " bus: EISA, APIC: 82489DX\n" );
619 printf( " bus: MCA, APIC: 82489DX\n" );
622 printf( " bus: ISA+PCI, APIC: Integrated\n" );
625 printf( " bus: EISA+PCI, APIC: Integrated\n" );
628 printf( " bus: MCA+PCI, APIC: Integrated\n" );
631 printf( " future type\n" );
635 switch ( featureByte ) {
648 printf( " future type\n" );
662 MPConfigTableHeader( u_int32_t pap )
670 int oldtype, entrytype;
673 printf( "MP Configuration Table Header MISSING!\n" );
677 /* convert physical address to virtual address */
680 /* read in cth structure */
682 readEntry( &cth, sizeof( cth ) );
684 printf( "MP Config Table Header:\n\n" );
686 printf( " physical address:\t\t0x%08x\n", pap );
688 printf( " signature:\t\t\t'" );
689 pnstr( cth.signature, 4 );
692 printf( " base table length:\t\t%d\n", cth.base_table_length );
694 printf( " version:\t\t\t1.%1d\n", cth.spec_rev );
695 printf( " checksum:\t\t\t0x%02x\n", cth.checksum );
697 printf( " OEM ID:\t\t\t'" );
698 pnstr( cth.oem_id, 8 );
701 printf( " Product ID:\t\t\t'" );
702 pnstr( cth.product_id, 12 );
705 printf( " OEM table pointer:\t\t0x%08x\n", cth.oem_table_pointer );
706 printf( " OEM table size:\t\t%d\n", cth.oem_table_size );
708 printf( " entry count:\t\t\t%d\n", cth.entry_count );
710 printf( " local APIC address:\t\t0x%08x\n", cth.apic_address );
712 printf( " extended table length:\t%d\n", cth.extended_table_length );
713 printf( " extended table checksum:\t%d\n", cth.extended_table_checksum );
715 totalSize = cth.base_table_length - sizeof( struct MPCTH );
716 count = cth.entry_count;
720 printf( "MP Config Base Table Entries:\n\n" );
722 /* initialze tables */
723 for ( x = 0; x < 16; ++x ) {
724 busses[ x ] = apics[ x ] = 0xff;
733 for (c = count; c; c--) {
734 entrytype = readType();
735 if (entrytype != oldtype)
737 if (entrytype < oldtype)
738 printf("MPTABLE OUT OF ORDER!\n");
742 printf( "Processors:\tAPIC ID\tVersion\tState"
743 "\t\tFamily\tModel\tStep\tFlags\n" );
750 printf( "Bus:\t\tBus ID\tType\n" );
757 printf( "I/O APICs:\tAPIC ID\tVersion\tState\t\tAddress\n" );
764 printf( "I/O Ints:\tType\tPolarity Trigger\tBus ID\t IRQ\tAPIC ID\tPIN#\n" );
771 printf( "Local Ints:\tType\tPolarity Trigger\tBus ID\t IRQ\tAPIC ID\tPIN#\n" );
777 printf("MPTABLE HOSED! record type = %d\n", entrytype);
783 #if defined( EXTENDED_PROCESSING_READY )
784 /* process any extended data */
785 if ( (totalSize = cth.extended_table_length) ) {
788 printf( "MP Config Extended Table Entries:\n\n" );
790 while ( totalSize > 0 ) {
791 switch ( type = readType() ) {
802 printf( "Extended Table HOSED!\n" );
806 totalSize -= extendedtableEntryTypes[ type-128 ].length;
809 #endif /* EXTENDED_PROCESSING_READY */
811 /* process any OEM data */
812 if ( cth.oem_table_pointer && (cth.oem_table_size > 0) ) {
813 #if defined( OEM_PROCESSING_READY )
814 # error your on your own here!
815 /* convert OEM table pointer to virtual address */
816 poemtp = (u_int32_t)cth.oem_table_pointer;
818 /* read in oem table structure */
819 if ( (oemdata = (void*)malloc( cth.oem_table_size )) == NULL )
820 err( 1, "oem malloc" );
823 readEntry( oemdata, cth.oem_table_size );
829 printf( "\nyou need to modify the source to handle OEM data!\n\n" );
830 #endif /* OEM_PROCESSING_READY */
835 #if defined( RAW_DUMP )
838 u_char dumpbuf[ 4096 ];
840 ofd = open( "/tmp/mpdump", O_CREAT | O_RDWR );
842 readEntry( dumpbuf, 1024 );
843 write( ofd, dumpbuf, 1024 );
846 #endif /* RAW_DUMP */
858 if ( read( pfd, &type, sizeof( u_char ) ) != sizeof( u_char ) )
859 err( 1, "type read; pfd: %d", pfd );
861 if ( lseek( pfd, -1, SEEK_CUR ) < 0 )
862 err( 1, "type seek" );
872 seekEntry( u_int32_t addr )
874 if ( lseek( pfd, (off_t)addr, SEEK_SET ) < 0 )
875 err( 1, "%s seek", _PATH_MEM );
883 readEntry( void* entry, int size )
885 if ( read( pfd, entry, size ) != size )
886 err( 1, "readEntry" );
891 processorEntry( void )
895 /* read it into local memory */
896 readEntry( &entry, sizeof( entry ) );
901 printf( "\t\t%2d", entry.apicID );
902 printf( "\t 0x%2x", entry.apicVersion );
905 (entry.cpuFlags & PROCENTRY_FLAG_BP) ? "BSP" : "AP",
906 (entry.cpuFlags & PROCENTRY_FLAG_EN) ? "usable" : "unusable" );
908 printf( "\t %d\t %d\t %d",
909 (entry.cpuSignature >> 8) & 0x0f,
910 (entry.cpuSignature >> 4) & 0x0f,
911 entry.cpuSignature & 0x0f );
913 printf( "\t 0x%04x\n", entry.featureFlags );
921 lookupBusType( char* name )
925 for ( x = 0; x < MAX_BUSTYPE; ++x )
926 if ( strcmp( busTypeTable[ x ].name, name ) == 0 )
927 return busTypeTable[ x ].type;
929 return UNKNOWN_BUSTYPE;
941 /* read it into local memory */
942 readEntry( &entry, sizeof( entry ) );
947 printf( "\t\t%2d", entry.busID );
948 printf( "\t " ); pnstr( entry.busType, 6 ); printf( "\n" );
950 for ( x = 0; x < 6; ++x ) {
951 if ( (c = entry.busType[ x ]) == ' ' )
956 busses[ entry.busID ] = lookupBusType( name );
965 /* read it into local memory */
966 readEntry( &entry, sizeof( entry ) );
971 printf( "\t\t%2d", entry.apicID );
972 printf( "\t 0x%02x", entry.apicVersion );
974 (entry.apicFlags & IOAPICENTRY_FLAG_EN) ? "usable" : "unusable" );
975 printf( "\t\t 0x%x\n", entry.apicAddress );
977 apics[ entry.apicID ] = entry.apicID;
981 const char* intTypes[] = {
982 "INT", "NMI", "SMI", "ExtINT"
985 const char* polarityMode[] = {
986 "conforms", "active-hi", "reserved", "active-lo"
988 const char* triggerMode[] = {
989 "conforms", "edge", "reserved", "level"
997 /* read it into local memory */
998 readEntry( &entry, sizeof( entry ) );
1001 if ( (int)entry.type == 3 )
1004 printf( "\t\t%s", intTypes[ (int)entry.intType ] );
1006 printf( "\t%9s", polarityMode[ (int)entry.intFlags & 0x03 ] );
1007 printf( "%12s", triggerMode[ ((int)entry.intFlags >> 2) & 0x03 ] );
1009 printf( "\t %5d", (int)entry.srcBusID );
1010 if ( busses[ (int)entry.srcBusID ] == PCI )
1012 ((int)entry.srcBusIRQ >> 2) & 0x1f,
1013 ((int)entry.srcBusIRQ & 0x03) + 'A' );
1015 printf( "\t %3d", (int)entry.srcBusIRQ );
1016 printf( "\t %6d", (int)entry.dstApicID );
1017 printf( "\t %3d\n", (int)entry.dstApicINT );
1026 /* read it into local memory */
1027 readEntry( &entry, sizeof( entry ) );
1029 printf( "--\n%s\n", extendedtableEntryTypes[entry.type - 128].name );
1030 printf( " bus ID: %d", entry.busID );
1031 printf( " address type: " );
1032 switch ( entry.addressType ) {
1034 printf( "I/O address\n" );
1037 printf( "memory address\n" );
1040 printf( "prefetch address\n" );
1043 printf( "UNKNOWN type\n" );
1047 printf( " address base: 0x%llx\n", (long long)entry.addressBase );
1048 printf( " address range: 0x%llx\n", (long long)entry.addressLength );
1057 /* read it into local memory */
1058 readEntry( &entry, sizeof( entry ) );
1060 printf( "--\n%s\n", extendedtableEntryTypes[entry.type - 128].name );
1061 printf( " bus ID: %d", entry.busID );
1062 printf( " bus info: 0x%02x", entry.busInfo );
1063 printf( " parent bus ID: %d\n", entry.busParent );
1072 /* read it into local memory */
1073 readEntry( &entry, sizeof( entry ) );
1075 printf( "--\n%s\n", extendedtableEntryTypes[entry.type - 128].name );
1076 printf( " bus ID: %d", entry.busID );
1077 printf( " address modifier: %s\n", (entry.addressMod & 0x01) ?
1078 "subtract" : "add" );
1079 printf( " predefined range: 0x%08x\n", entry.predefinedRange );
1091 printf( "dmesg output:\n\n" );
1101 pnstr( char* s, int c )
1103 char string[ MAXPNSTR + 1 ];
1107 strncpy( string, s, c );
1109 printf( "%s", string );