1 /* 2 * Copyright (c) 2023-2024, Advanced Micro Devices, Inc. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 #include <common/debug.h> 7 #include <lib/mmio.h> 8 #include <plat/common/platform.h> 9 10 #include <platform_def.h> 11 #include <plat_clkfunc.h> 12 #include <plat_private.h> 13 14 uint32_t plat_get_syscnt_freq2(void) 15 { 16 uint32_t counter_freq = 0; 17 uint32_t ret = 0; 18 19 counter_freq = mmio_read_32(IOU_SCNTRS_BASE + 20 IOU_SCNTRS_BASE_FREQ_OFFSET); 21 if (counter_freq != 0U) { 22 ret = counter_freq; 23 } else { 24 INFO("Indicates counter frequency %dHz setting to %dHz\n", 25 counter_freq, cpu_clock); 26 ret = cpu_clock; 27 } 28 29 return ret; 30 } 31 32 void set_cnt_freq(void) 33 { 34 uint64_t counter_freq; 35 36 /* Configure counter frequency */ 37 counter_freq = read_cntfrq_el0(); 38 if (counter_freq == 0U) { 39 write_cntfrq_el0(plat_get_syscnt_freq2()); 40 } 41 } 42