Date: Thu, 12 Sep 1996 18:45:11 -0600 From: Steve Passe <smp@csn.net> To: freebsd-smp@freebsd.org Cc: peter@spinner.dialix.com Subject: mptable.c Message-ID: <199609130045.SAA20723@clem.systemsix.com>
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Hi,
here's the tool to parse out your MP table from your motherboard. It
uses /dev/kmem so it must be built and run as root.
Keywords: MP Spec, Configuration Table
----------------------------------- cut ---------------------------------------
/*
* mptable.c
*/
#define MP_SIG 0x5f504d5f /* _MP_ */
#define EXTENDED_PROCESSING_READY
#define OEM_PROCESSING_READY_NOT
/** cheat for now, hardcode address */
#define CHEATING_NOT
#if 0
/* XXPRESS */
#define CHEAT_ADDRESS 0x000f7ba0
#else
/* GA586DX */
#define CHEAT_ADDRESS 0x000f0c80
#endif
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/types.h>
#include <machine/types.h>
#if 0
#include <machine/param.h>
#include <machine/pmap.h>
#include <machine/vmparam.h>
what else? and is it worth it?
#else
#define KERNBASE ((vm_offset_t)0xf0000000)
#endif
#define BIOS_BASE 0xf0000
#define BIOS_SIZE 0x10000
#define ONE_KBYTE 1024
#define PROCENTRY_FLAG_EN 0x01
#define PROCENTRY_FLAG_BP 0x02
#define IOAPICENTRY_FLAG_EN 0x01
#define MAXPNSTR 132
char* whereStrings[] = {
"Extended BIOS Data Area",
"@ top of memory",
"BIOS"
};
typedef struct TABLE_ENTRY {
u_char type;
u_char length;
char name[ 32 ];
} tableEntry;
tableEntry basetableEntryTypes[] =
{
{ 0, 20, "Processor" },
{ 1, 8, "Bus" },
{ 2, 8, "I/O APIC" },
{ 3, 8, "I/O INT" },
{ 4, 8, "Local INT" }
};
tableEntry extendedtableEntryTypes[] =
{
{ 128, 20, "System Address Space" },
{ 129, 8, "Bus Heirarchy" },
{ 130, 8, "Compatibility Bus Address" }
};
/* MP Floating Pointer Structure */
typedef struct MPFPS {
char signature[ 4 ];
void* pap;
u_char length;
u_char spec_rev;
u_char checksum;
u_char mpfb1;
u_char mpfb2;
u_char mpfb3;
u_char mpfb4;
u_char mpfb5;
} mpfps_t;
/* MP Configuration Table Header */
typedef struct MPCTH {
char signature[ 4 ];
u_short base_table_length;
u_char spec_rev;
u_char checksum;
u_char oem_id[ 8 ];
u_char product_id[ 12 ];
void* oem_table_pointer;
u_short oem_table_size;
u_short entry_count;
void* apic_address;
u_short extended_table_length;
u_char extended_table_checksum;
u_char reserved;
} mpcth_t;
typedef struct PROCENTRY {
u_char type;
u_char apicID;
u_char apicVersion;
u_char cpuFlags;
u_long cpuSignature;
u_long featureFlags;
u_long reserved1;
u_long reserved2;
} ProcEntry;
typedef struct BUSENTRY {
u_char type;
u_char busID;
char busType[ 6 ];
} BusEntry;
typedef struct IOAPICENTRY {
u_char type;
u_char apicID;
u_char apicVersion;
u_char apicFlags;
void* apicAddress;
} IOApicEntry;
typedef struct INTENTRY {
u_char type;
u_char intType;
u_short intFlags;
u_char srcBusID;
u_char srcBusIRQ;
u_char dstApicID;
u_char dstApicINT;
} IntEntry;
/*
* extended entry type structures
*/
typedef struct SASENTRY {
u_char type;
u_char length;
u_char busID;
u_char addressType;
u_int64_t addressBase;
u_int64_t addressLength;
} SasEntry;
typedef struct BHDENTRY {
u_char type;
u_char length;
u_char busID;
u_char busInfo;
u_char busParent;
u_char reserved[ 3 ];
} BhdEntry;
typedef struct CBASMENTRY {
u_char type;
u_char length;
u_char busID;
u_char addressMod;
u_int predefinedRange;
} CbasmEntry;
static void apic_probe( vm_offset_t* paddr, int* where );
static void MPConfigDefault( int featureByte );
static int MPFloatingPointer( vm_offset_t paddr, int where, mpfps_t* mpfps );
static void MPConfigTableHeader( void* pap );
static int readType( void );
static void seekEntry( vm_offset_t addr );
static void readEntry( void* entry, int size );
static void processorEntry( void );
static void busEntry( void );
static void ioApicEntry( void );
static void intEntry( void );
static void sasEntry( void );
static void bhdEntry( void );
static void cbasmEntry( void );
static void pnstr( char* s, int c );
/* global data */
int kfd;
/*
*
*/
int
main( int argc, char *argv[] )
{
vm_offset_t paddr;
int where;
mpfps_t mpfps;
int defaultConfig;
/* open kernel memory for access to MP structures */
if ( (kfd = open( "/dev/kmem", O_RDONLY )) < 0 )
{
perror( "kmem open" );
exit( 1 );
}
/* probe for MP structures */
apic_probe( &paddr, &where );
if ( where <= 0 )
{
fprintf( stderr, "\n MP Table NOT found!!!\n\n" );
return 1;
}
printf( "\n-------------------------------------" );
printf( "-------------------------------------\n" );
printf( "\nFound MP Table in %s, physical addr: 0x%08x\n",
whereStrings[ where - 1 ], paddr );
printf( "\n-------------------------------------" );
printf( "-------------------------------------\n" );
/* analyze the MP Floating Pointer Structure */
MPFloatingPointer( paddr, where, &mpfps );
printf( "\n-------------------------------------" );
printf( "-------------------------------------\n" );
/* check whether an MP config table exists */
if ( defaultConfig = mpfps.mpfb1 )
{
MPConfigDefault( defaultConfig );
}
else
{
MPConfigTableHeader( mpfps.pap );
}
printf( "\n-------------------------------------" );
printf( "-------------------------------------\n" );
return 0;
}
/*
* set PHYSICAL address of MP floating pointer structure
*/
static void
apic_probe( vm_offset_t* paddr, int* where )
{
#if defined( CHEATING )
/** cheat for now, hardcode address */
*paddr = (vm_offset_t)CHEAT_ADDRESS;
/** cheat again, where we found it */
*where = 3;
#else /** CHEATING */
/*
* c rewrite of apic_probe() by Jack F. Vogel
*/
int x;
unsigned short segment;
vm_offset_t target;
unsigned int buffer[ 16384 ];
if ( 1 )
{
/* why can't I access kmem below 0xf0010000? */
fprintf( stderr, "\nWarning: EBDA support is BROKEN!!!\n" );
}
else
{
/* EBDA is @ 40:0e in real-mode terms */
seekEntry( (vm_offset_t)0x040e + KERNBASE );
readEntry( &segment, 2 );
if ( segment ) /* search EBDA */
{
target = (vm_offset_t)segment << 4;
seekEntry( target + KERNBASE );
readEntry( buffer, ONE_KBYTE );
for ( x = 0; x < ONE_KBYTE / sizeof ( unsigned int ); ++x )
{
if ( buffer[ x ] == MP_SIG )
{
*where = 1;
*paddr = (x * sizeof( unsigned int )) + target;
return;
}
}
}
}
# if 0
/** we should read CMOS for real top of mem, for now: */
# else
/* base of the last 1K of 640K */
target = 0x9fc00;
# endif
seekEntry( target + KERNBASE);
readEntry( buffer, ONE_KBYTE );
for ( x = 0; x < ONE_KBYTE / sizeof ( unsigned int ); ++x )
{
if ( buffer[ x ] == MP_SIG )
{
*where = 2;
*paddr = (x * sizeof( unsigned int )) + target;
return;
}
}
/* search the BIOS */
seekEntry( BIOS_BASE + KERNBASE );
readEntry( buffer, BIOS_SIZE );
for ( x = 0; x < BIOS_SIZE / sizeof( unsigned int ); ++x )
{
if ( buffer[ x ] == MP_SIG )
{
*where = 3;
*paddr = (x * sizeof( unsigned int )) + BIOS_BASE;
return;
}
}
*where = 0;
*paddr = (vm_offset_t)0;
#endif /** CHEATING */
}
/*
*
*/
static int
MPFloatingPointer( vm_offset_t paddr, int where, mpfps_t* mpfps )
{
vm_offset_t vaddr;
/* convert physical address to a virtual address */
vaddr = paddr + (vm_offset_t)KERNBASE;
/* read in mpfps structure*/
seekEntry( vaddr );
readEntry( mpfps, sizeof( mpfps_t ) );
/* show its contents */
printf( "MP Floating Pointer Structure:\n\n" );
printf( " location:\t\t\t", where );
switch ( where )
{
case 0: printf( "NOT found!\n" ); exit( 1 );
case 1: printf( "EBDA\n" ); break;
case 2: printf( "base memory\n" ); break;
case 3: printf( "BIOS\n" ); break;
default: printf( "BOGUS!\n" ); exit( 1 );
}
printf( " physical address:\t\t0x%08x\n", paddr );
printf( " signature:\t\t\t'" );
pnstr( mpfps->signature, 4 );
printf( "'\n" );
printf( " length:\t\t\t%d bytes\n", mpfps->length * 16 );
printf( " version:\t\t\t1.%1d\n", mpfps->spec_rev );
printf( " checksum:\t\t\t0x%02x\n", mpfps->checksum );
/* bits 0:6 are RESERVED */
if ( mpfps->mpfb2 & 0x7f )
{
printf( " warning, MP feature byte 2: 0x%02x\n" );
}
/* bit 7 is IMCRP */
printf( " mode:\t\t\t\t%s\n", (mpfps->mpfb2 & 0x80) ?
"PIC" : "Virtual Wire" );
/* MP feature bytes 3-5 are expected to be ZERO */
if ( mpfps->mpfb3 ) printf( " warning, MP feature byte 3 NONZERO!\n" );
if ( mpfps->mpfb4 ) printf( " warning, MP feature byte 4 NONZERO!\n" );
if ( mpfps->mpfb5 ) printf( " warning, MP feature byte 5 NONZERO!\n" );
}
/*
*
*/
static void
MPConfigDefault( int featureByte )
{
printf( " MP default config type: %d\n\n", featureByte );
switch ( featureByte )
{
case 1: printf( " bus: ISA, APIC: 82489DX\n" ); break;
case 2: printf( " bus: EISA, APIC: 82489DX\n" ); break;
case 3: printf( " bus: EISA, APIC: 82489DX\n" ); break;
case 4: printf( " bus: MCA, APIC: 82489DX\n" ); break;
case 5: printf( " bus: ISA+PCI, APIC: Integrated\n" ); break;
case 6: printf( " bus: EISA+PCI, APIC: Integrated\n" ); break;
case 7: printf( " bus: MCA+PCI, APIC: Integrated\n" ); break;
default: printf( " future type\n" ); break;
}
}
/*
*
*/
static void
MPConfigTableHeader( void* pap )
{
vm_offset_t vaddr;
mpcth_t cth;
int totalSize;
int count;
int type;
vm_offset_t voemtp;
void* oemdata;
if ( pap == 0 )
{
printf( "MP Configuration Table Header MISSING!\n" );
exit( 1 );
}
/* convert physical address to virtual address */
vaddr = (vm_offset_t)pap + (vm_offset_t)KERNBASE;
/* read in cth structure */
seekEntry( vaddr );
readEntry( &cth, sizeof( cth ) );
printf( "MP Config Table Header:\n\n" );
printf( " physical address:\t\t0x%08x\n", pap );
printf( " signature:\t\t\t'" );
pnstr( cth.signature, 4 );
printf( "'\n" );
printf( " base table length:\t\t%d\n", cth.base_table_length );
printf( " version:\t\t\t1.%1d\n", cth.spec_rev );
printf( " checksum:\t\t\t0x%02x\n", cth.checksum );
printf( " OEM ID:\t\t\t'" );
pnstr( cth.oem_id, 8 );
printf( "'\n" );
printf( " Product ID:\t\t\t'" );
pnstr( cth.product_id, 12 );
printf( "'\n" );
printf( " OEM table pointer:\t\t0x%08x\n", cth.oem_table_pointer );
printf( " OEM table size:\t\t%d\n", cth.oem_table_size );
printf( " entry count:\t\t\t%d\n", cth.entry_count );
printf( " local APIC address:\t\t0x%08x\n", cth.apic_address );
printf( " extended table length:\t%d\n", cth.extended_table_length );
printf( " extended table checksum:\t%d\n", cth.extended_table_checksum );
totalSize = cth.base_table_length - sizeof( struct MPCTH );
count = cth.entry_count;
printf( "\n-------------------------------------" );
printf( "-------------------------------------\n" );
printf( "MP Config Base Table Entries:\n\n" );
while ( count-- )
{
switch ( type = readType() )
{
case 0: processorEntry(); break;
case 1: busEntry(); break;
case 2: ioApicEntry(); break;
case 3: intEntry(); break;
case 4: intEntry(); break;
default:
printf( "Base Table HOSED!\n" );
exit( 1 );
}
totalSize -= basetableEntryTypes[ type ].length;
}
#if defined( EXTENDED_PROCESSING_READY )
/* process any extended data */
if ( totalSize = cth.extended_table_length )
{
printf( "\n-------------------------------------" );
printf( "-------------------------------------\n" );
printf( "MP Config Extended Table Entries:\n\n" );
while ( totalSize > 0 )
{
switch ( type = readType() )
{
case 128: sasEntry(); break;
case 129: bhdEntry(); break;
case 130: cbasmEntry(); break;
default:
printf( "Extended Table HOSED!\n" );
exit( 1 );
}
totalSize -= extendedtableEntryTypes[ type-128 ].length;
}
}
#endif /* EXTENDED_PROCESSING_READY */
/* process any OEM data */
if ( cth.oem_table_pointer && (cth.oem_table_size > 0) )
{
#if defined( OEM_PROCESSING_READY )
# error your on your own here!
/* convert OEM table pointer to virtual address */
voemtp = (vm_offset_t)cth.oem_table_pointer + (vm_offset_t)KERNBASE;
/* read in oem table structure */
if ( (oemdata = (void*)malloc( cth.oem_table_size )) == NULL )
{
perror( "oem malloc" );
exit( 1 );
}
seekEntry( voemtp );
readEntry( oemdata, cth.oem_table_size );
/** process it */
free( oemdata );
#else
printf( "\nyou need to modify the source to handle OEM data!\n\n" );
#endif /* OEM_PROCESSING_READY */
}
}
/*
*
*/
static int
readType( void )
{
u_char type;
if ( read( kfd, &type, sizeof( u_char ) ) != sizeof( u_char ) )
{
perror( "type read" );
exit( 1 );
}
if ( lseek( kfd, -1, SEEK_CUR ) < 0 )
{
perror( "type seek" );
exit( 1 );
}
return (int)type;
}
/*
*
*/
static void
seekEntry( vm_offset_t addr )
{
if ( lseek( kfd, (off_t)addr, SEEK_SET ) < 0 )
{
fprintf( stderr, "\nvaddr: 0x%08x\n", addr );
perror( "kmem seek" );
exit( 1 );
}
}
/*
*
*/
static void
readEntry( void* entry, int size )
{
if ( read( kfd, entry, size ) != size )
{
perror( "readEntry" );
exit( 1 );
}
}
static void
processorEntry( void )
{
ProcEntry entry;
/* read it into local memory */
readEntry( &entry, sizeof( entry ) );
printf( "--\n%s\n", basetableEntryTypes[ entry.type ].name );
printf( " apic ID: %d", entry.apicID );
printf( ", version: %d\n", entry.apicVersion );
printf( " CPU %s usable, CPU %s the bootstrap processor\n",
(entry.cpuFlags & PROCENTRY_FLAG_EN) ? "is" : "is NOT",
(entry.cpuFlags & PROCENTRY_FLAG_BP) ? "is" : "is NOT" );
printf( " family: %d, model: %d, stepping: %d\n",
(entry.cpuSignature >> 8) & 0x0f,
(entry.cpuSignature >> 4) & 0x0f,
entry.cpuSignature & 0x0f );
printf( " feature flags: 0x%08x\n", entry.featureFlags );
}
static void
busEntry( void )
{
BusEntry entry;
/* read it into local memory */
readEntry( &entry, sizeof( entry ) );
printf( "--\n%s\n", basetableEntryTypes[ entry.type ].name );
printf( " bus ID: %d", entry.busID );
printf( ", bus type: " ); pnstr( entry.busType, 6 ); printf( "\n" );
}
static void
ioApicEntry( void )
{
IOApicEntry entry;
/* read it into local memory */
readEntry( &entry, sizeof( entry ) );
printf( "--\n%s\n", basetableEntryTypes[ entry.type ].name );
printf( " apic ID: %d", entry.apicID );
printf( ", version: %d\n", entry.apicVersion );
printf( " APIC %s usable\n",
(entry.apicFlags & IOAPICENTRY_FLAG_EN) ? "is" : "is NOT" );
printf( " apic address: 0x%x\n", entry.apicAddress );
}
static void
intEntry( void )
{
IntEntry entry;
/* read it into local memory */
readEntry( &entry, sizeof( entry ) );
printf( "--\n%s\n", basetableEntryTypes[ entry.type ].name );
printf( " INT type: %d", (int)entry.intType );
printf( ", flags: 0x%04x\n", (int)entry.intFlags );
printf( " source bus ID: %d", (int)entry.srcBusID );
printf( ", IRQ: %d\n", (int)entry.srcBusIRQ );
printf( " destination APIC ID: %d", (int)entry.dstApicID );
printf( ", INT: %d\n", (int)entry.dstApicINT );
}
static void
sasEntry( void )
{
SasEntry entry;
/* read it into local memory */
readEntry( &entry, sizeof( entry ) );
printf( "--\n%s\n", extendedtableEntryTypes[ entry.type ].name );
printf( " bus ID: %d", entry.busID );
printf( " address type: " );
switch ( entry.addressType )
{
case 0: printf( "I/O address\n" ); break;
case 1: printf( "memory address\n" ); break;
case 2: printf( "prefetch address\n" ); break;
default: printf( "UNKNOWN type\n" ); break;
}
printf( " address base: 0x%qx\n", entry.addressBase );
printf( " address range: 0x%qx\n", entry.addressLength );
}
static void
bhdEntry( void )
{
BhdEntry entry;
/* read it into local memory */
readEntry( &entry, sizeof( entry ) );
printf( "--\n%s\n", extendedtableEntryTypes[ entry.type ].name );
printf( " bus ID: %d", entry.busID );
printf( " bus info: 0x%02x", entry.busInfo );
printf( " parent bus ID: %d", entry.busParent );
}
static void
cbasmEntry( void )
{
CbasmEntry entry;
/* read it into local memory */
readEntry( &entry, sizeof( entry ) );
printf( "--\n%s\n", extendedtableEntryTypes[ entry.type ].name );
printf( " bus ID: %d", entry.busID );
printf( " address modifier: %s\n", (entry.addressMod & 0x01) ?
"subtract" : "add" );
printf( " predefined range: 0x%08x", entry.predefinedRange );
}
/*
*
*/
static void
pnstr( char* s, int c )
{
char string[ MAXPNSTR + 1 ];
if ( c > MAXPNSTR ) c = MAXPNSTR;
strncpy( string, s, c );
string[ c ] = '\0';
printf( "%s", string );
}
----------------------------------- cut ---------------------------------------
--
Steve Passe | powered by
smp@csn.net | FreeBSD
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