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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>
60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
/*
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* Copyright (c) 2016, 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 <arch_helpers.h>
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#include <common/bl_common.h>
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#include <common/debug.h>
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#include <drivers/delay_timer.h>
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#include <drivers/generic_delay_timer.h>
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#include <plat/common/platform.h>
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/* Ticks elapsed in one second by a signal of 1 MHz */
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#define MHZ_TICKS_PER_SEC 1000000
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static timer_ops_t ops;
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static uint32_t get_timer_value(void)
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{
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/*
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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. The value is
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* clipped from 64 to 32 bits.
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*/
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return (uint32_t)(~read_cntpct_el0());
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}
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void generic_delay_timer_init_args(uint32_t mult, uint32_t div)
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{
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ops.get_timer_value = get_timer_value;
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ops.clk_mult = mult;
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ops.clk_div = div;
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timer_init(&ops);
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VERBOSE("Generic delay timer configured with mult=%u and div=%u\n",
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mult, div);
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}
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void generic_delay_timer_init(void)
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{
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/* Value in ticks */
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unsigned int mult = MHZ_TICKS_PER_SEC;
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/* Value in ticks per second (Hz) */
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unsigned int div = plat_get_syscnt_freq2();
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/* Reduce multiplier and divider by dividing them repeatedly by 10 */
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while (((mult % 10U) == 0U) && ((div % 10U) == 0U)) {
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mult /= 10U;
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div /= 10U;
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}
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generic_delay_timer_init_args(mult, div);
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}
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