mpc55xxevb/start/siu.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSBSPsPowerPCMPC55XX
0007  *
0008  * @brief System Integration Unit Access (SIU).
0009  */
0010
0011 /*
0012  * Copyright (c) 2010 embedded brains GmbH & Co. KG
0013  *
0014  * Redistribution and use in source and binary forms, with or without
0015  * modification, are permitted provided that the following conditions
0016  * are met:
0017  * 1. Redistributions of source code must retain the above copyright
0018  *    notice, this list of conditions and the following disclaimer.
0019  * 2. Redistributions in binary form must reproduce the above copyright
0020  *    notice, this list of conditions and the following disclaimer in the
0021  *    documentation and/or other materials provided with the distribution.
0022  *
0023  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0024  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0025  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0026  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0027  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0028  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0029  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0030  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0031  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0032  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0033  * POSSIBILITY OF SUCH DAMAGE.
0034  */
0035
0036 #include <mpc55xx/regs.h>
0037 #include <mpc55xx/mpc55xx.h>
0038 #include <mpc55xx/siu.h>
0039
0040 rtems_status_code mpc55xx_siu_pcr_init(volatile struct SIU_tag *siu,
0041                        const mpc55xx_siu_pcr_entry_t *pcr_entry)
0042 {
0043   int idx,cnt;
0044   /*
0045    * repeat, until end of list reached (pcr_cnt = 0)
0046    */
0047   while ((pcr_entry != NULL) &&
0048      (pcr_entry->pcr_cnt > 0)) {
0049     idx = pcr_entry->pcr_idx;
0050     for (cnt = pcr_entry->pcr_cnt;cnt > 0;cnt--) {
0051       siu->PCR[idx++].R = pcr_entry->pcr_val.R;
0052     }
0053     pcr_entry++;
0054   }
0055   return RTEMS_SUCCESSFUL;
0056 }