1 /* 2 * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 #include <arch_helpers.h> 7 #include <mcucfg.h> 8 #include <mmio.h> 9 #include <mt8173_def.h> 10 #include <mt_cpuxgpt.h> 11 12 static void write_cpuxgpt(unsigned int reg_index, unsigned int value) 13 { 14 mmio_write_32((uintptr_t)&mt8173_mcucfg->xgpt_idx, reg_index); 15 mmio_write_32((uintptr_t)&mt8173_mcucfg->xgpt_ctl, value); 16 } 17 18 static void cpuxgpt_set_init_cnt(unsigned int countH, unsigned int countL) 19 { 20 write_cpuxgpt(INDEX_CNT_H_INIT, countH); 21 /* update count when countL programmed */ 22 write_cpuxgpt(INDEX_CNT_L_INIT, countL); 23 } 24 25 void generic_timer_backup(void) 26 { 27 uint64_t cval; 28 29 cval = read_cntpct_el0(); 30 cpuxgpt_set_init_cnt((uint32_t)(cval >> 32), 31 (uint32_t)(cval & 0xffffffff)); 32 } 33