From e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb Mon Sep 17 00:00:00 2001 From: Yang Zhang Date: Fri, 28 Aug 2015 09:58:54 +0800 Subject: Add qemu 2.4.0 Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang --- qemu/roms/ipxe/src/interface/linux/linux_smbios.c | 115 ++++++++++++++++++++++ 1 file changed, 115 insertions(+) create mode 100644 qemu/roms/ipxe/src/interface/linux/linux_smbios.c (limited to 'qemu/roms/ipxe/src/interface/linux/linux_smbios.c') diff --git a/qemu/roms/ipxe/src/interface/linux/linux_smbios.c b/qemu/roms/ipxe/src/interface/linux/linux_smbios.c new file mode 100644 index 000000000..6e5174d23 --- /dev/null +++ b/qemu/roms/ipxe/src/interface/linux/linux_smbios.c @@ -0,0 +1,115 @@ +/* + * Copyright (C) 2013 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., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +#include +#include +#include +#include + +/** SMBIOS filename */ +static const char smbios_filename[] = "/dev/mem"; + +/** SMBIOS entry point scan region start address */ +#define SMBIOS_ENTRY_START 0xf0000 + +/** SMBIOS entry point scan region length */ +#define SMBIOS_ENTRY_LEN 0x10000 + +/** SMBIOS mapping alignment */ +#define SMBIOS_ALIGN 0x1000 + +/** + * Find SMBIOS + * + * @v smbios SMBIOS entry point descriptor structure to fill in + * @ret rc Return status code + */ +static int linux_find_smbios ( struct smbios *smbios ) { + struct smbios_entry entry; + void *entry_mem; + void *smbios_mem; + size_t smbios_offset; + size_t smbios_indent; + size_t smbios_len; + int fd; + int rc; + + /* Open SMBIOS file */ + fd = linux_open ( smbios_filename, O_RDONLY ); + if ( fd < 0 ) { + rc = -ELINUX ( linux_errno ); + DBGC ( smbios, "SMBIOS could not open %s: %s\n", + smbios_filename, linux_strerror ( linux_errno ) ); + goto err_open; + } + + /* Map the region potentially containing the SMBIOS entry point */ + entry_mem = linux_mmap ( NULL, SMBIOS_ENTRY_LEN, PROT_READ, MAP_SHARED, + fd, SMBIOS_ENTRY_START ); + if ( entry_mem == MAP_FAILED ) { + rc = -ELINUX ( linux_errno ); + DBGC ( smbios, "SMBIOS could not mmap %s (%#x+%#x): %s\n", + smbios_filename, SMBIOS_ENTRY_START, SMBIOS_ENTRY_LEN, + linux_strerror ( linux_errno ) ); + goto err_mmap_entry; + } + + /* Scan for the SMBIOS entry point */ + if ( ( rc = find_smbios_entry ( virt_to_user ( entry_mem ), + SMBIOS_ENTRY_LEN, &entry ) ) != 0 ) + goto err_find_entry; + + /* Map the region containing the SMBIOS structures */ + smbios_indent = ( entry.smbios_address & ( SMBIOS_ALIGN - 1 ) ); + smbios_offset = ( entry.smbios_address - smbios_indent ); + smbios_len = ( entry.smbios_len + smbios_indent ); + smbios_mem = linux_mmap ( NULL, smbios_len, PROT_READ, MAP_SHARED, + fd, smbios_offset ); + if ( smbios_mem == MAP_FAILED ) { + rc = -ELINUX ( linux_errno ); + DBGC ( smbios, "SMBIOS could not mmap %s (%#zx+%#zx): %s\n", + smbios_filename, smbios_offset, smbios_len, + linux_strerror ( linux_errno ) ); + goto err_mmap_smbios; + } + + /* Fill in entry point descriptor structure */ + smbios->address = virt_to_user ( smbios_mem + smbios_indent ); + smbios->len = entry.smbios_len; + smbios->count = entry.smbios_count; + smbios->version = SMBIOS_VERSION ( entry.major, entry.minor ); + + /* Unmap the entry point region (no longer required) */ + linux_munmap ( entry_mem, SMBIOS_ENTRY_LEN ); + + return 0; + + linux_munmap ( smbios_mem, smbios_len ); + err_mmap_smbios: + err_find_entry: + linux_munmap ( entry_mem, SMBIOS_ENTRY_LEN ); + err_mmap_entry: + linux_close ( fd ); + err_open: + return rc; +} + +PROVIDE_SMBIOS ( linux, find_smbios, linux_find_smbios ); -- cgit 1.2.3-korg