From 29480dd7159190b91cca17298a87425a58826d32 Mon Sep 17 00:00:00 2001 From: Michael Brown Date: Thu, 4 Dec 2008 23:09:48 +0000 Subject: [efi] Use EFI-native mechanism for accessing SMBIOS table 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. --- src/interface/efi/efi_smbios.c | 62 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 src/interface/efi/efi_smbios.c (limited to 'src/interface/efi') diff --git a/src/interface/efi/efi_smbios.c b/src/interface/efi/efi_smbios.c new file mode 100644 index 000000000..5888f2f91 --- /dev/null +++ b/src/interface/efi/efi_smbios.c @@ -0,0 +1,62 @@ +/* + * Copyright (C) 2008 Michael Brown . + * + * 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 +#include +#include +#include + +/** @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 ); -- cgit v1.2.3-55-g7522