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author | 2015-08-28 09:58:54 +0800 | |
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committer | 2015-09-01 12:44:00 +0800 | |
commit | e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch) | |
tree | 66b09f592c55df2878107a468a91d21506104d3f /qemu/roms/ipxe/src/core/acpi.c | |
parent | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff) |
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/roms/ipxe/src/core/acpi.c')
-rw-r--r-- | qemu/roms/ipxe/src/core/acpi.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/qemu/roms/ipxe/src/core/acpi.c b/qemu/roms/ipxe/src/core/acpi.c new file mode 100644 index 000000000..330f50631 --- /dev/null +++ b/qemu/roms/ipxe/src/core/acpi.c @@ -0,0 +1,86 @@ +/* + * Copyright (C) 2006 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., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +#include <errno.h> +#include <ipxe/acpi.h> +#include <ipxe/interface.h> + +/** @file + * + * ACPI support functions + * + */ + +/****************************************************************************** + * + * Utility functions + * + ****************************************************************************** + */ + +/** + * Fix up ACPI table checksum + * + * @v acpi ACPI table header + */ +void acpi_fix_checksum ( struct acpi_description_header *acpi ) { + unsigned int i = 0; + uint8_t sum = 0; + + for ( i = 0 ; i < acpi->length ; i++ ) { + sum += *( ( ( uint8_t * ) acpi ) + i ); + } + acpi->checksum -= sum; +} + +/****************************************************************************** + * + * Interface methods + * + ****************************************************************************** + */ + +/** + * Describe object in an ACPI table + * + * @v intf Interface + * @v acpi ACPI table + * @v len Length of ACPI table + * @ret rc Return status code + */ +int acpi_describe ( struct interface *intf, + struct acpi_description_header *acpi, size_t len ) { + struct interface *dest; + acpi_describe_TYPE ( void * ) *op = + intf_get_dest_op ( intf, acpi_describe, &dest ); + void *object = intf_object ( dest ); + int rc; + + if ( op ) { + rc = op ( object, acpi, len ); + } else { + /* Default is to fail to describe */ + rc = -EOPNOTSUPP; + } + + intf_put ( dest ); + return rc; +} |