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09d40e0e08
Enforce full include path for includes. Deprecate old paths.
The following folders inside include/lib have been left unchanged:
- include/lib/cpus/${ARCH}
- include/lib/el3_runtime/${ARCH}
The reason for this change is that having a global namespace for
includes isn't a good idea. It defeats one of the advantages of having
folders and it introduces problems that are sometimes subtle (because
you may not know the header you are actually including if there are two
of them).
For example, this patch had to be created because two headers were
called the same way: e0ea0928d5 ("Fix gpio includes of mt8173 platform
to avoid collision."). More recently, this patch has had similar
problems: 46f9b2c3a2 ("drivers: add tzc380 support").
This problem was introduced in commit 4ecca33988 ("Move include and
source files to logical locations"). At that time, there weren't too
many headers so it wasn't a real issue. However, time has shown that
this creates problems.
Platforms that want to preserve the way they include headers may add the
removed paths to PLAT_INCLUDES, but this is discouraged.
Change-Id: I39dc53ed98f9e297a5966e723d1936d6ccf2fc8f
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
72 lines
2 KiB
C
72 lines
2 KiB
C
/*
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* Copyright (c) 2015-2018, ARM Limited and Contributors. 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 <assert.h>
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#include <platform_def.h>
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#include <drivers/delay_timer.h>
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#include <lib/utils_def.h>
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/***********************************************************
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* The delay timer implementation
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***********************************************************/
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static const timer_ops_t *timer_ops;
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/***********************************************************
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* Delay for the given number of microseconds. The driver must
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* be initialized before calling this function.
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***********************************************************/
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void udelay(uint32_t usec)
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{
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assert((timer_ops != NULL) &&
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(timer_ops->clk_mult != 0U) &&
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(timer_ops->clk_div != 0U) &&
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(timer_ops->get_timer_value != NULL));
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uint32_t start, delta, total_delta;
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assert(usec < (UINT32_MAX / timer_ops->clk_div));
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start = timer_ops->get_timer_value();
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/* Add an extra tick to avoid delaying less than requested. */
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total_delta =
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div_round_up(usec * timer_ops->clk_div,
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timer_ops->clk_mult) + 1U;
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do {
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/*
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* If the timer value wraps around, the subtraction will
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* overflow and it will still give the correct result.
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*/
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delta = start - timer_ops->get_timer_value(); /* Decreasing counter */
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} while (delta < total_delta);
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}
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/***********************************************************
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* Delay for the given number of milliseconds. The driver must
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* be initialized before calling this function.
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***********************************************************/
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void mdelay(uint32_t msec)
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{
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udelay(msec * 1000U);
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}
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/***********************************************************
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* Initialize the timer. The fields in the provided timer
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* ops pointer must be valid.
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***********************************************************/
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void timer_init(const timer_ops_t *ops_ptr)
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{
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assert((ops_ptr != NULL) &&
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(ops_ptr->clk_mult != 0U) &&
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(ops_ptr->clk_div != 0U) &&
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(ops_ptr->get_timer_value != NULL));
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timer_ops = ops_ptr;
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}
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