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.
62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
/*
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* Cirrus EP7312 Clock driver
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*
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* Copyright (c) 2002 by Jay Monkman <jtm@smoothsmoothie.com>
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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 <rtems.h>
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#include <ep7312.h>
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#include <bsp.h>
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#include <bsp/irq.h>
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#include <assert.h>
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#if ON_SKYEYE==1
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#define CLOCK_DRIVER_USE_FAST_IDLE 1
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#endif
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void Clock_isr(void * arg);
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#define Clock_driver_support_at_tick() \
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do { \
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*EP7312_TC1EOI = 0xffffffff; \
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} while(0)
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#define Clock_driver_support_install_isr( _new ) \
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do { \
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rtems_status_code status = RTEMS_SUCCESSFUL; \
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status = rtems_interrupt_handler_install( \
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BSP_TC1OI, \
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"Clock", \
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RTEMS_INTERRUPT_UNIQUE, \
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Clock_isr, \
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NULL \
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); \
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assert(status == RTEMS_SUCCESSFUL); \
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} while(0)
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/*
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* Set up the clock hardware
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*/
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#if ON_SKYEYE
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#define TCD_VALUE \
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(rtems_configuration_get_microseconds_per_tick() * 2000)/25000
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#else
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#define TCD_VALUE \
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(rtems_configuration_get_microseconds_per_tick() * 2000)/1000000
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#endif
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#define Clock_driver_support_initialize_hardware() \
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do { \
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*EP7312_SYSCON1 |= EP7312_SYSCON1_TC1_PRESCALE; \
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*EP7312_TC1D = TCD_VALUE; \
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*EP7312_TC1EOI = 0xFFFFFFFF; \
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} while (0)
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#define CLOCK_DRIVER_USE_DUMMY_TIMECOUNTER
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#include "../../../shared/dev/clock/clockimpl.h"
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