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/*
* Copyright (c) 2014, ARM Limited. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the ARM nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdint.h>
#include <smc.h>
#include <tftf.h>
#include <trusted_os.h>
#include <uuid_utils.h>
unsigned int is_trusted_os_present(uuid_t *tos_uuid)
{
smc64_args tos_uid_args = { TOS_UID };
smc64_ret_values ret;
uint32_t *tos_uuid32;
ret = tftf_smc64(&tos_uid_args);
if ((ret.ret0 == SMC_UNKNOWN) ||
((ret.ret0 == 0) && (ret.ret1 == 0) && (ret.ret2 == 0) &&
(ret.ret3 == 0)))
return 0;
tos_uuid32 = (uint32_t *) tos_uuid;
tos_uuid32[0] = ret.ret0;
tos_uuid32[1] = ret.ret1;
tos_uuid32[2] = ret.ret2;
tos_uuid32[3] = ret.ret3;
return 1;
}
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