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[efi] Use EFI-native mechanism for accessing SMBIOS table

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EFI provides a copy of the SMBIOS table accessible via the EFI system
table, which we should use instead of manually scanning through the
F000:0000 segment.
This commit is contained in:
Michael Brown
2008-12-04 23:09:48 +00:00
parent 045a22764a
commit 29480dd715
15 changed files with 376 additions and 180 deletions
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62
src/interface/efi/efi_smbios.c Normal file
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/*
* Copyright (C) 2008 Michael Brown <mbrown@fensystems.co.uk>.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <errno.h>
#include <gpxe/smbios.h>
#include <gpxe/efi/efi.h>
#include <gpxe/efi/Guid/SmBios.h>
/** @file
*
* gPXE SMBIOS API for EFI
*
*/
/** SMBIOS configuration table */
static struct smbios_entry *smbios_entry;
EFI_USE_TABLE ( EFI_SMBIOS_TABLE, &smbios_entry, 0 );
/**
* Find SMBIOS
*
* @v smbios SMBIOS entry point descriptor structure to fill in
* @ret rc Return status code
*/
static int efi_find_smbios ( struct smbios *smbios ) {
if ( ! smbios_entry ) {
DBG ( "No SMBIOS table provided\n" );
return -ENODEV;
}
if ( smbios_entry->signature != SMBIOS_SIGNATURE ) {
DBG ( "Invalid SMBIOS signature\n" );
return -ENODEV;
}
smbios->address = phys_to_user ( smbios_entry->smbios_address );
smbios->len = smbios_entry->smbios_len;
smbios->count = smbios_entry->smbios_count;
DBG ( "Found SMBIOS v%d.%d entry point at %p (%x+%zx)\n",
smbios_entry->major, smbios_entry->minor, smbios_entry,
smbios_entry->smbios_address, smbios->len );
return 0;
}
PROVIDE_SMBIOS ( efi, find_smbios, efi_find_smbios );