1 /* 2 * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are met: 6 * 7 * Redistributions of source code must retain the above copyright notice, this 8 * list of conditions and the following disclaimer. 9 * 10 * Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 14 * Neither the name of ARM nor the names of its contributors may be used 15 * to endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 #include <arch_helpers.h> 31 #include <mcucfg.h> 32 #include <mmio.h> 33 #include <mt8173_def.h> 34 #include <mt_cpuxgpt.h> 35 36 static void write_cpuxgpt(unsigned int reg_index, unsigned int value) 37 { 38 mmio_write_32((uintptr_t)&mt8173_mcucfg->xgpt_idx, reg_index); 39 mmio_write_32((uintptr_t)&mt8173_mcucfg->xgpt_ctl, value); 40 } 41 42 static void cpuxgpt_set_init_cnt(unsigned int countH, unsigned int countL) 43 { 44 write_cpuxgpt(INDEX_CNT_H_INIT, countH); 45 /* update count when countL programmed */ 46 write_cpuxgpt(INDEX_CNT_L_INIT, countL); 47 } 48 49 void generic_timer_backup(void) 50 { 51 uint64_t cval; 52 53 cval = read_cntpct_el0(); 54 cpuxgpt_set_init_cnt((uint32_t)(cval >> 32), 55 (uint32_t)(cval & 0xffffffff)); 56 } 57