/* Copyright (c)  2013 Nordic Semiconductor. All Rights Reserved.
 *
 * The information contained herein is property of Nordic Semiconductor ASA.
 * Terms and conditions of usage are described in detail in NORDIC
 * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
 *
 * Licensees are granted free, non-transferable use of the information. NO
 * WARRANTY of ANY KIND is provided. This heading must NOT be removed from
 * the file.
 *
 */

 /** @cond To make doxygen skip this file */

/** @file
 *  This header contains defines regarding persistent storage that are specific to
 *  persistent storage implementation and application use case.
 */
#ifndef PSTORAGE_PL_H__
#define PSTORAGE_PL_H__

#include <stdint.h>
#include "nrf.h"

#ifdef __cplusplus
extern "C" {
#endif

static __INLINE uint16_t pstorage_flash_page_size()
{
  return (uint16_t)NRF_FICR->CODEPAGESIZE;
}

#define PSTORAGE_FLASH_PAGE_SIZE     pstorage_flash_page_size()          /**< Size of one flash page. */
#define PSTORAGE_FLASH_EMPTY_MASK    0xFFFFFFFF                          /**< Bit mask that defines an empty address in flash. */

static __INLINE uint32_t pstorage_flash_page_end()
{
   uint32_t bootloader_addr = NRF_UICR->NRFFW[0];

   return ((bootloader_addr != PSTORAGE_FLASH_EMPTY_MASK) ?
           (bootloader_addr/ PSTORAGE_FLASH_PAGE_SIZE) : NRF_FICR->CODESIZE);
}

#define PSTORAGE_FLASH_PAGE_END     pstorage_flash_page_end()

#define PSTORAGE_NUM_OF_PAGES       2                                                           /**< Number of flash pages allocated for the pstorage module excluding the swap page, configurable based on system requirements. */
#define PSTORAGE_MIN_BLOCK_SIZE     0x0010                                                      /**< Minimum size of block that can be registered with the module. Should be configured based on system requirements, recommendation for this value is to have at least the size of a word. */

#define PSTORAGE_DATA_START_ADDR    ((PSTORAGE_FLASH_PAGE_END - PSTORAGE_NUM_OF_PAGES) \
                                    * PSTORAGE_FLASH_PAGE_SIZE)                                 /**< Start address for persistent data, configurable according to system requirements. */
#define PSTORAGE_DATA_END_ADDR      (PSTORAGE_FLASH_PAGE_END * PSTORAGE_FLASH_PAGE_SIZE)        /**< End address for persistent data, configurable according to system requirements. */
#define PSTORAGE_MAX_BLOCK_SIZE     PSTORAGE_FLASH_PAGE_SIZE                                    /**< Maximum size of block that can be registered with the module. Should be configured based on system requirements. Also, should be greater than or equal to the minimum size. */
#define PSTORAGE_CMD_QUEUE_SIZE     30                                                          /**< Maximum number of flash access commands that can be maintained by the module for all applications. Configurable. */


/** Abstracts persistently memory block identifier. */
typedef uint32_t pstorage_block_t;

typedef struct
{
    uint32_t            module_id;      /**< Module ID.*/
    pstorage_block_t    block_id;       /**< Block ID.*/
} pstorage_handle_t;

typedef uint16_t pstorage_size_t;      /** Size of length and offset fields. */

/**@brief Handles Flash Access Result Events. To be called in the system event dispatcher of the application. */
void pstorage_sys_event_handler (uint32_t sys_evt);


#ifdef __cplusplus
}
#endif

#endif // PSTORAGE_PL_H__

/** @} */
/** @endcond */
