diff options
Diffstat (limited to 'include/runtime_services/trusted_os.h')
-rw-r--r-- | include/runtime_services/trusted_os.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/include/runtime_services/trusted_os.h b/include/runtime_services/trusted_os.h new file mode 100644 index 000000000..f480c6bcb --- /dev/null +++ b/include/runtime_services/trusted_os.h @@ -0,0 +1,34 @@ +/* + * Copyright (c) 2018, Arm Limited. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +/* + * Definitions related to the Trusted OS Service as per the SMC Calling + * Convention. + */ + +#ifndef __TRUSTED_OS_H__ +#define __TRUSTED_OS_H__ + +#include <uuid.h> + +/* Trusted OS Function IDs that fall under Trusted OS call range */ +#define SMC_TOS_CALL_COUNT 0xbf00ff00 +#define SMC_TOS_UID 0xbf00ff01 +/* 0xbf00ff02 is reserved */ +#define SMC_TOS_REVISION 0xbf00ff03 + +/* + * Detect whether a Trusted OS is present in the software stack. + * This is implemented using the Trusted OS UID SMC call. + * + * If a Trusted OS is detected then this function returns 1 + * and populates 'tos_uuid' with the UUID of the detected Trusted OS. + * Otherwise, this function returns 0 and the value pointed by 'tos_uuid' + * should be ignored. + */ +unsigned int is_trusted_os_present(uuid_t *tos_uuid); + +#endif /* __TRUSTED_OS_H__ */ |