bios_smbios.c File Reference

System Management BIOS. More...

#include <stdint.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include <ipxe/uaccess.h>
#include <ipxe/smbios.h>
#include <realmode.h>
#include <pnpbios.h>

Go to the source code of this file.

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
static int	bios_find_smbios2 (struct smbios *smbios)
	Find SMBIOS. More...
static int	bios_find_smbios3 (struct smbios *smbios)
	Find SMBIOS. More...
static int	bios_find_smbios (struct smbios *smbios)
	Find SMBIOS. More...
	PROVIDE_SMBIOS (pcbios, find_smbios, bios_find_smbios)

Detailed Description

System Management BIOS.

Definition in file bios_smbios.c.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

bios_find_smbios2()

static int bios_find_smbios2 ( struct smbios *  smbios )

static

Find SMBIOS.

Parameters

smbios

SMBIOS entry point descriptor structure to fill in

Return values

rc	Return status code

Definition at line 47 of file bios_smbios.c.

                                                       {
        const struct smbios_entry *entry;

        /* Scan through BIOS segment to find SMBIOS 32-bit entry point */
        entry = find_smbios_entry ( real_to_virt ( BIOS_SEG, 0 ), 0x10000 );
        if ( ! entry )
                return -ENOENT;

        /* Fill in entry point descriptor structure */
        smbios->address = phys_to_virt ( entry->smbios_address );
        smbios->len = entry->smbios_len;
        smbios->count = entry->smbios_count;
        smbios->version = SMBIOS_VERSION ( entry->major, entry->minor );

        return 0;
}

References smbios::address, BIOS_SEG, smbios::count, ENOENT, find_smbios_entry(), smbios::len, smbios_entry::major, smbios_entry::minor, real_to_virt(), smbios_entry::smbios_address, smbios_entry::smbios_count, smbios_entry::smbios_len, SMBIOS_VERSION, and smbios::version.

Referenced by bios_find_smbios().

bios_find_smbios3()

static int bios_find_smbios3 ( struct smbios *  smbios )

static

Find SMBIOS.

Parameters

smbios

SMBIOS entry point descriptor structure to fill in

Return values

rc	Return status code

Definition at line 70 of file bios_smbios.c.

                                                       {
        const struct smbios3_entry *entry;

        /* Scan through BIOS segment to find SMBIOS 64-bit entry point */
        entry = find_smbios3_entry ( real_to_virt ( BIOS_SEG, 0 ), 0x10000 );
        if ( ! entry )
                return -ENOENT;

        /* Check that address is accessible */
        if ( entry->smbios_address > ~( ( physaddr_t ) 0 ) ) {
                DBG ( "SMBIOS3 at %08llx is inaccessible\n",
                      ( ( unsigned long long ) entry->smbios_address ) );
                return -ENOTSUP;
        }

        /* Fill in entry point descriptor structure */
        smbios->address = phys_to_virt ( entry->smbios_address );
        smbios->len = entry->smbios_len;
        smbios->count = 0;
        smbios->version = SMBIOS_VERSION ( entry->major, entry->minor );

        return 0;
}

References smbios::address, BIOS_SEG, smbios::count, DBG, ENOENT, ENOTSUP, find_smbios3_entry(), smbios::len, smbios3_entry::major, smbios3_entry::minor, real_to_virt(), smbios3_entry::smbios_address, smbios3_entry::smbios_len, SMBIOS_VERSION, and smbios::version.

Referenced by bios_find_smbios().

bios_find_smbios()

static int bios_find_smbios ( struct smbios *  smbios )

static

Find SMBIOS.

Parameters

smbios

SMBIOS entry point descriptor structure to fill in

Return values

rc	Return status code

Definition at line 100 of file bios_smbios.c.

                                                      {
        int rc;

        /* Use 32-bit table if present */
        if ( ( rc = bios_find_smbios2 ( smbios ) ) == 0 )
                return 0;

        /* Otherwise, use 64-bit table if present and accessible */
        if ( ( rc = bios_find_smbios3 ( smbios ) ) == 0 )
                return 0;

        return rc;
}

References bios_find_smbios2(), bios_find_smbios3(), and rc.

PROVIDE_SMBIOS()

PROVIDE_SMBIOS	(	pcbios	,
		find_smbios	,
		bios_find_smbios
	)