/* * Copyright (c) 2019, ARM Limited and Contributors. All rights reserved. * * SPDX-License-Identifier: BSD-3-Clause */ #include #include #include #include #define S10_GLOBAL_TIMER 0xffd01000 #define S10_GLOBAL_TIMER_EN 0x3 /******************************************************************** * The timer delay function ********************************************************************/ static uint32_t plat_get_timer_value(void) { /* * Generic delay timer implementation expects the timer to be a down * counter. We apply bitwise NOT operator to the tick values returned * by read_cntpct_el0() to simulate the down counter. The value is * clipped from 64 to 32 bits. */ return (uint32_t)(~read_cntpct_el0()); } static const timer_ops_t plat_timer_ops = { .get_timer_value = plat_get_timer_value, .clk_mult = 1, .clk_div = PLAT_SYS_COUNTER_FREQ_IN_MHZ, }; void plat_delay_timer_init(void) { timer_init(&plat_timer_ops); mmio_write_32(S10_GLOBAL_TIMER, S10_GLOBAL_TIMER_EN); }