| /** @addtogroup NQ |
| * @{ |
| * Notifications inform the MobiCore runtime environment that information is |
| * pending in a WSM buffer. |
| * The Trustlet Connector (TLC) and the corresponding trustlet also utilize |
| * this buffer to notify each other about new data within the |
| * Trustlet Connector Interface (TCI). |
| * |
| * The buffer is set up as a queue, which means that more than one |
| * notification can be written to the buffer before the switch to the other |
| * world is performed. Each side therefore facilitates an incoming and an |
| * outgoing queue for communication with the other side. |
| * |
| * Notifications hold the session ID, which is used to reference the |
| * communication partner in the other world. |
| * So if, e.g., the TLC in the normal world wants to notify his trustlet |
| * about new data in the TLC buffer |
| * |
| * @file |
| * Notification queue declarations. |
| * |
| * <!-- Copyright Giesecke & Devrient GmbH 2009-2012 --> |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. 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. |
| * 3. The name of the author may not be used to endorse or promote |
| * products derived from this software without specific prior |
| * written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. |
| */ |
| #ifndef NQ_H_ |
| #define NQ_H_ |
| |
| /** \name NQ Size Defines |
| * Minimum and maximum count of elements in the notification queue. |
| * @{ */ |
| #define MIN_NQ_ELEM 1 /**< Minimum notification queue elements. */ |
| #define MAX_NQ_ELEM 64 /**< Maximum notification queue elements. */ |
| /** @} */ |
| |
| /** \name NQ Length Defines |
| * Minimum and maximum notification queue length. |
| * @{ */ |
| /**< Minimum notification length (in bytes). */ |
| #define MIN_NQ_LEN (MIN_NQ_ELEM * sizeof(notification_t)) |
| /**< Maximum notification length (in bytes). */ |
| #define MAX_NQ_LEN (MAX_NQ_ELEM * sizeof(notification_t)) |
| /** @} */ |
| |
| /** \name Session ID Defines |
| * Standard Session IDs. |
| * @{ */ |
| /**< MCP session ID is used when directly communicating with the MobiCore |
| * (e.g. for starting and stopping of trustlets). */ |
| #define SID_MCP 0 |
| /**< Invalid session id is returned in case of an error. */ |
| #define SID_INVALID 0xffffffff |
| /** @} */ |
| |
| /** Notification data structure. */ |
| struct notification_t { |
| uint32_t sessionId; /**< Session ID. */ |
| int32_t payload; /**< Additional notification information. */ |
| }; |
| |
| /** Notification payload codes. |
| * 0 indicated a plain simple notification, |
| * a positive value is a termination reason from the task, |
| * a negative value is a termination reason from MobiCore. |
| * Possible negative values are given below. |
| */ |
| enum notificationPayload_t { |
| /**< task terminated, but exit code is invalid */ |
| ERR_INVALID_EXIT_CODE = -1, |
| /**< task terminated due to session end, no exit code available */ |
| ERR_SESSION_CLOSE = -2, |
| /**< task terminated due to invalid operation */ |
| ERR_INVALID_OPERATION = -3, |
| /**< session ID is unknown */ |
| ERR_INVALID_SID = -4, |
| /**< session is not active */ |
| ERR_SID_NOT_ACTIVE = -5 |
| }; |
| |
| /** Declaration of the notification queue header. |
| * layout as specified in the data structure specification. |
| */ |
| struct notificationQueueHeader_t { |
| uint32_t writeCnt; /**< Write counter. */ |
| uint32_t readCnt; /**< Read counter. */ |
| uint32_t queueSize; /**< Queue size. */ |
| }; |
| |
| /** Queue struct which defines a queue object. |
| * The queue struct is accessed by the queue<operation> type of |
| * function. elementCnt must be a power of two and the power needs |
| * to be smaller than power of uint32_t (obviously 32). |
| */ |
| struct notificationQueue_t { |
| /**< Queue header. */ |
| struct notificationQueueHeader_t hdr; |
| /**< Notification elements. */ |
| struct notification_t notification[MIN_NQ_ELEM]; |
| } ; |
| |
| #endif /** NQ_H_ */ |
| |
| /** @} */ |