1 /* 2 * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #include <arch_helpers.h> 8 #include <lib/mmio.h> 9 10 #include <mcucfg.h> 11 #include <mt8173_def.h> 12 #include <mt_cpuxgpt.h> 13 14 static void write_cpuxgpt(unsigned int reg_index, unsigned int value) 15 { 16 mmio_write_32((uintptr_t)&mt8173_mcucfg->xgpt_idx, reg_index); 17 mmio_write_32((uintptr_t)&mt8173_mcucfg->xgpt_ctl, value); 18 } 19 20 static void cpuxgpt_set_init_cnt(unsigned int countH, unsigned int countL) 21 { 22 write_cpuxgpt(INDEX_CNT_H_INIT, countH); 23 /* update count when countL programmed */ 24 write_cpuxgpt(INDEX_CNT_L_INIT, countL); 25 } 26 27 void generic_timer_backup(void) 28 { 29 uint64_t cval; 30 31 cval = read_cntpct_el0(); 32 cpuxgpt_set_init_cnt((uint32_t)(cval >> 32), 33 (uint32_t)(cval & 0xffffffff)); 34 } 35