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.
99 lines
2.2 KiB
C
99 lines
2.2 KiB
C
/**
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* @file
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* @ingroup sparc_leon2
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* @brief Clock Tick Device Driver
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*
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* This routine initializes LEON timer 1 which used for the clock tick.
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*
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* The tick frequency is directly programmed to the configured number of
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* microseconds per tick.
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*/
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/*
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* COPYRIGHT (c) 1989-2008.
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* On-Line Applications Research Corporation (OAR).
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*
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* Modified for LEON BSP
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* COPYRIGHT (c) 2004.
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* Gaisler Research.
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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.h>
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#include <bspopts.h>
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#include <rtems/timecounter.h>
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#include <rtems/score/sparcimpl.h>
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static rtems_timecounter_simple leon2_tc;
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static uint32_t leon2_tc_get( rtems_timecounter_simple *tc )
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{
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return LEON_REG.Timer_Counter_1;
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}
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static bool leon2_tc_is_pending( rtems_timecounter_simple *tc )
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{
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return LEON_Is_interrupt_pending( LEON_INTERRUPT_TIMER1 );
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}
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static uint32_t leon2_tc_get_timecount( struct timecounter *tc )
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{
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return rtems_timecounter_simple_downcounter_get(
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tc,
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leon2_tc_get,
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leon2_tc_is_pending
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);
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}
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static void leon2_tc_at_tick( rtems_timecounter_simple *tc )
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{
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/* Nothing to do */
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}
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static void leon2_tc_tick( void )
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{
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rtems_timecounter_simple_downcounter_tick(
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&leon2_tc,
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leon2_tc_get,
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leon2_tc_at_tick
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);
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}
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/*
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* The Real Time Clock Counter Timer uses this trap type.
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*/
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#define CLOCK_VECTOR LEON_TRAP_TYPE( LEON_INTERRUPT_TIMER1 )
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#define Clock_driver_support_install_isr( _new ) \
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set_vector( _new, CLOCK_VECTOR, 1 )
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extern int CLOCK_SPEED;
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#define Clock_driver_support_initialize_hardware() \
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do { \
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LEON_REG.Timer_Reload_1 = \
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rtems_configuration_get_microseconds_per_tick() - 1; \
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\
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LEON_REG.Timer_Control_1 = ( \
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LEON_REG_TIMER_COUNTER_ENABLE_COUNTING | \
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LEON_REG_TIMER_COUNTER_RELOAD_AT_ZERO | \
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LEON_REG_TIMER_COUNTER_LOAD_COUNTER \
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); \
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rtems_timecounter_simple_install( \
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&leon2_tc, \
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1000000, \
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rtems_configuration_get_microseconds_per_tick(), \
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leon2_tc_get_timecount \
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); \
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} while (0)
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#define Clock_driver_timecounter_tick() leon2_tc_tick()
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#include "../../../shared/dev/clock/clockimpl.h"
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SPARC_COUNTER_DEFINITION;
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