1*91f16700Schasinglulu /* 2*91f16700Schasinglulu * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved. 3*91f16700Schasinglulu * 4*91f16700Schasinglulu * SPDX-License-Identifier: BSD-3-Clause 5*91f16700Schasinglulu */ 6*91f16700Schasinglulu 7*91f16700Schasinglulu #include <arch_helpers.h> 8*91f16700Schasinglulu #include <lib/mmio.h> 9*91f16700Schasinglulu 10*91f16700Schasinglulu #include <mcucfg.h> 11*91f16700Schasinglulu #include <mt8173_def.h> 12*91f16700Schasinglulu #include <mt_cpuxgpt.h> 13*91f16700Schasinglulu 14*91f16700Schasinglulu static void write_cpuxgpt(unsigned int reg_index, unsigned int value) 15*91f16700Schasinglulu { 16*91f16700Schasinglulu mmio_write_32((uintptr_t)&mt8173_mcucfg->xgpt_idx, reg_index); 17*91f16700Schasinglulu mmio_write_32((uintptr_t)&mt8173_mcucfg->xgpt_ctl, value); 18*91f16700Schasinglulu } 19*91f16700Schasinglulu 20*91f16700Schasinglulu static void cpuxgpt_set_init_cnt(unsigned int countH, unsigned int countL) 21*91f16700Schasinglulu { 22*91f16700Schasinglulu write_cpuxgpt(INDEX_CNT_H_INIT, countH); 23*91f16700Schasinglulu /* update count when countL programmed */ 24*91f16700Schasinglulu write_cpuxgpt(INDEX_CNT_L_INIT, countL); 25*91f16700Schasinglulu } 26*91f16700Schasinglulu 27*91f16700Schasinglulu void generic_timer_backup(void) 28*91f16700Schasinglulu { 29*91f16700Schasinglulu uint64_t cval; 30*91f16700Schasinglulu 31*91f16700Schasinglulu cval = read_cntpct_el0(); 32*91f16700Schasinglulu cpuxgpt_set_init_cnt((uint32_t)(cval >> 32), 33*91f16700Schasinglulu (uint32_t)(cval & 0xffffffff)); 34*91f16700Schasinglulu } 35