40 lines
889 B
C
Executable File
40 lines
889 B
C
Executable File
/*
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* Copyright (c) Lotus. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*
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*/
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#include <arch_helpers.h>
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#include <delay_timer.h>
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#include <platform_def.h>
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#include <lib/mmio.h>
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#define USE_SYS_COUNTER 1
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static uint32_t plat_get_timer_value(void)
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{
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#ifdef USE_SYS_COUNTER
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/* Generic delay timer implementation expects the timer to be a down
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* counter. We apply bitwise NOT operator to the tick values returned
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* by read_cntpct_el0() to simulate the down counter. */
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return (uint32_t)(~read_cntpct_el0());
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#else
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return (uint32_t)(~mmio_read_32(LOTUS_TIMER_VALUE));
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#endif
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}
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static const timer_ops_t plat_timer_ops = {
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.get_timer_value = plat_get_timer_value,
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.clk_mult = 1,
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#ifdef USE_SYS_COUNTER
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.clk_div = SYS_COUNTER_FREQ_IN_MHZ,
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#else
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.clk_div = LOTUS_TIMER_FREQ_IN_MHZ,
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#endif
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};
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void plat_delay_timer_init(void)
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{
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timer_init(&plat_timer_ops);
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}
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