forked from Imagelibrary/rtems
7ee5931393
The aim of this clock driver hook was to stop clock tick interrupts at some late point in the exit() procedure. The use of atexit() pulls in malloc() which pulls in errno. It is incompatible with the intention of the CONFIGURE_DISABLE_NEWLIB_REENTRANCY configuration option. The exit() function must be called from thread context, so accompanied clock tick interrupts should cause no harm. On the contrary, someone may assume a normal operating system operation, e.g. working timeouts. Remove the Clock_driver_support_shutdown_hardware() clock driver hook. Close #3436.
101 lines
2.4 KiB
C
101 lines
2.4 KiB
C
/*
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* Copyright (c) 2011, 2018 Sebastian Huber. All rights reserved.
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*
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* embedded brains GmbH
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* Dornierstr. 4
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* 82178 Puchheim
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* Germany
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* <rtems@embedded-brains.de>
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#include <bsp/clock-armv7m.h>
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#include <rtems.h>
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#include <rtems/sysinit.h>
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#ifdef ARM_MULTILIB_ARCH_V7M
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/* This is defined in dev/clock/clockimpl.h */
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static void Clock_isr(void *arg);
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ARMV7M_Timecounter _ARMV7M_TC;
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static uint32_t _ARMV7M_TC_get_timecount(struct timecounter *base)
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{
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return _ARMV7M_Clock_counter((ARMV7M_Timecounter *) base);
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}
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static void _ARMV7M_Clock_handler(void)
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{
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_ARMV7M_Interrupt_service_enter();
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Clock_isr(NULL);
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_ARMV7M_Interrupt_service_leave();
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}
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static void _ARMV7M_Clock_handler_install(void)
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{
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_ARMV7M_Set_exception_priority_and_handler(
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ARMV7M_VECTOR_SYSTICK,
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BSP_ARMV7M_SYSTICK_PRIORITY,
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_ARMV7M_Clock_handler
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);
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}
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static void _ARMV7M_Clock_initialize(void)
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{
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volatile ARMV7M_Systick *systick;
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ARMV7M_Timecounter *tc;
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systick = _ARMV7M_Systick;
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tc = &_ARMV7M_TC;
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systick->csr = ARMV7M_SYSTICK_CSR_ENABLE
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| ARMV7M_SYSTICK_CSR_TICKINT
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| ARMV7M_SYSTICK_CSR_CLKSOURCE;
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tc->base.tc_get_timecount = _ARMV7M_TC_get_timecount;
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tc->base.tc_counter_mask = 0xffffffff;
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tc->base.tc_frequency = _ARMV7M_Clock_frequency();
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tc->base.tc_quality = RTEMS_TIMECOUNTER_QUALITY_CLOCK_DRIVER;
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rtems_timecounter_install(&tc->base);
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}
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static void _ARMV7M_Clock_initialize_early(void)
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{
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volatile ARMV7M_Systick *systick;
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uint32_t us_per_tick;
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uint64_t freq;
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uint32_t interval;
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systick = _ARMV7M_Systick;
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us_per_tick = rtems_configuration_get_microseconds_per_tick();
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freq = _ARMV7M_Clock_frequency();
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interval = (uint32_t) ((freq * us_per_tick) / 1000000);
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systick->rvr = interval;
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systick->cvr = 0;
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systick->csr = ARMV7M_SYSTICK_CSR_ENABLE | ARMV7M_SYSTICK_CSR_CLKSOURCE;
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}
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RTEMS_SYSINIT_ITEM(
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_ARMV7M_Clock_initialize_early,
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RTEMS_SYSINIT_CPU_COUNTER,
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RTEMS_SYSINIT_ORDER_FIRST
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);
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#define Clock_driver_support_initialize_hardware() \
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_ARMV7M_Clock_initialize()
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#define Clock_driver_support_install_isr(isr) \
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_ARMV7M_Clock_handler_install()
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/* Include shared source clock driver code */
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#include "../../../shared/dev/clock/clockimpl.h"
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#endif /* ARM_MULTILIB_ARCH_V7M */
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