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cdcf1f1492
Move delay driver code to common directory, so that the same code can be re-used by both R-Car Gen3 and RZ/G2 platforms. Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> Change-Id: I5e806bd0e0a0a4b436048513b7089db90ff9805f
31 lines
639 B
C
31 lines
639 B
C
/*
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* Copyright (c) 2018-2020, Renesas Electronics Corporation. 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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#include <arch.h>
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#include <arch_helpers.h>
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#include "micro_delay.h"
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#define RCAR_CONV_MICROSEC 1000000U
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void
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#if IMAGE_BL31
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__attribute__ ((section(".system_ram")))
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#endif
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rcar_micro_delay(uint64_t micro_sec)
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{
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uint64_t freq;
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uint64_t base_count;
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uint64_t get_count;
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uint64_t wait_time = 0U;
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freq = read_cntfrq_el0();
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base_count = read_cntpct_el0();
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while (micro_sec > wait_time) {
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get_count = read_cntpct_el0();
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wait_time = ((get_count - base_count) * RCAR_CONV_MICROSEC) / freq;
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}
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}
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