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/*
ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio.
This file is part of ChibiOS.
ChibiOS 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 3 of the License, or
(at your option) any later version.
ChibiOS 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, see <http://www.gnu.org/licenses/>.
*/
/**
* @file tsclient.h
* @brief TSSI client module macros and structures.
*
* @addtogroup TSSI
* @{
*/
#ifndef TSCLIENT_H
#define TSCLIENT_H
/*===========================================================================*/
/* Module constants. */
/*===========================================================================*/
/* Service registry errors as returned by smc.*/
#define SMC_SVC_OK MSG_OK /* No error.*/
#define SMC_SVC_INTR (msg_t)-1 /* Service interrupted.*/
#define SMC_SVC_NOENT (msg_t)-2 /* No existent service.*/
#define SMC_SVC_INVALID (msg_t)-3 /* Invalid service parameter(s).*/
#define SMC_SVC_BADH (msg_t)-4 /* Invalid service handle.*/
#define SMC_SVC_EXIST (msg_t)-5 /* Service already exists.*/
#define SMC_SVC_NHND (msg_t)-6 /* No more services.*/
#define SMC_SVC_BUSY (msg_t)-7 /* Service busy.*/
/* Special trusted service handles.*/
#define TS_HND_DISCOVERY ((ts_service_t *)1) /* Discovery service handle.*/
#define TS_HND_STQRY ((ts_service_t *)2) /* Query status service handle.*/
#define TS_HND_IDLE ((ts_service_t *)3) /* Idle service handle.*/
/*===========================================================================*/
/* Module pre-compile time settings. */
/*===========================================================================*/
#define TS_GRANTED_TIMESLICE 1000 /* Microseconds.*/
#define TS_CHECK_EVENT_HOOK(f) { \
(void)f; \
}
/*===========================================================================*/
/* Derived constants and error checks. */
/*===========================================================================*/
/*===========================================================================*/
/* Module data structures and types. */
/*===========================================================================*/
typedef uint8_t * ts_params_area_t;
typedef void * ts_service_t;
/*===========================================================================*/
/* Module macros. */
/*===========================================================================*/
/*===========================================================================*/
/* Module inline functions. */
/*===========================================================================*/
/**
* @brief Call a service via smc instruction.
* @note see tsInvoke1()
*
* @notapi
*/
static inline int64_t tsInvoke0(ts_service_t handle, ts_params_area_t data,
size_t size, sysinterval_t yieldtime) {
register int64_t result asm("r0");
register int32_t r0 asm("r0") = (int32_t) handle;
register int32_t r1 asm("r1") = (int32_t) data;
register int32_t r2 asm("r2") = (int32_t) size;
register int32_t r3 asm("r3") = (int32_t) yieldtime;
__asm volatile ("smc #0" : "=r" (result) : "r" (r0), "r" (r1), "r" (r2),
"r" (r3) : "memory");
return result;
}
/**
* @brief Call a service via smc instruction.
* @details call a given service via smc and evaluate the eventflags mask
* returned by the secure world. The flags mask is checked by a
* macro, TS_CHECK_EVENT_HOOK, supplied by the user.
*
* @param[in] handle The handle of the service to invoke.
* The handle is obtained by an invoke to discovery
* service.
* @param[in,out] svc_data Service request data, often a reference to a more
* complex structure.
* @param[in] svc_datalen Size of the svc_data memory area.
* @param[in] yieldtime The time yield to SEC service to run, in microsec.
*
* @return A 64bit value. It is composed by the 32bit service
* status in the lo-word with the 32bit event mask in
* the hi-word.
* The retval values are returned in the lower word
* as 32bit int.
* @retval SMC_SVC_OK generic success value.
* @retval SMC_SVC_INTR call interrupted.
* @retval SMC_SVC_BUSY the service has a pending request.
* @retval SMC_SVC_INVALID bad parameters.
* @retval SMC_SVC_NOENT no such service.
* @retval SMC_SVC_BADH bad handle.
*
* @api
*/
static inline int64_t tsInvoke1(ts_service_t handle, ts_params_area_t data,
size_t size, sysinterval_t timeslice) {
int64_t result;
eventflags_t f;
result = tsInvoke0(handle, data, size, timeslice);
f = (eventflags_t)(result >> 32);
TS_CHECK_EVENT_HOOK(f);
return result;
}
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
#ifdef __cplusplus
extern "C" {
#endif
msg_t tsInvokeService(ts_service_t handle, ts_params_area_t data,
size_t size, sysinterval_t svc_nsec_time);
#ifdef __cplusplus
}
#endif
/*===========================================================================*/
/* Module inline functions. */
/*===========================================================================*/
#endif /* TSCLIENT_H */
/** @} */
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