src/vboot/callbacks/switches.c

/*
 * Copyright 2014 Google Inc.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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 (at your option) 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., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <libpayload.h>
#include <vboot_api.h>
#include <vboot/util/flag.h>

/*
 * Return the state of the switches specified in request_mask.
 * TODO(semenzato): find a better interface than the INIT_FLAGS.
 */
uint32_t VbExGetSwitches(uint32_t request_mask)
{
	uint32_t result = 0;

	if ((request_mask & VB_INIT_FLAG_DEV_SWITCH_ON) &&
            flag_fetch(FLAG_DEVSW))
		result |= VB_INIT_FLAG_DEV_SWITCH_ON;

	if ((request_mask & VB_INIT_FLAG_REC_BUTTON_PRESSED) &&
	    flag_fetch(FLAG_RECSW))
		result |= VB_INIT_FLAG_REC_BUTTON_PRESSED;

	if ((request_mask & VB_INIT_FLAG_WP_ENABLED) &&
	    flag_fetch(FLAG_WPSW))
		result |= VB_INIT_FLAG_WP_ENABLED;

	return result;
}