blob: 9f7cdcb31f35e8c8186a884b22bd1cf9456fe716 (
plain) (
tree)
|
|
/*
* Clock Tick Device Driver
*
* This routine initializes LEON timer 1 which used for the clock tick.
*
* The tick frequency is directly programmed to the configured number of
* microseconds per tick.
*
* COPYRIGHT (c) 1989-2008.
* On-Line Applications Research Corporation (OAR).
*
* Modified for LEON BSP
* COPYRIGHT (c) 2004.
* Gaisler Research.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#include <bsp.h>
#include <bspopts.h>
#if SIMSPARC_FAST_IDLE==1
#define CLOCK_DRIVER_USE_FAST_IDLE
#endif
/*
* The Real Time Clock Counter Timer uses this trap type.
*/
#define CLOCK_VECTOR LEON_TRAP_TYPE( LEON_INTERRUPT_TIMER1 )
#define Clock_driver_support_at_tick()
#define Clock_driver_support_install_isr( _new, _old ) \
do { \
_old = set_vector( _new, CLOCK_VECTOR, 1 ); \
} while(0)
extern int CLOCK_SPEED;
#define Clock_driver_support_initialize_hardware() \
do { \
LEON_REG.Timer_Reload_1 = rtems_configuration_get_microseconds_per_tick() - 1; \
\
LEON_REG.Timer_Control_1 = ( \
LEON_REG_TIMER_COUNTER_ENABLE_COUNTING | \
LEON_REG_TIMER_COUNTER_RELOAD_AT_ZERO | \
LEON_REG_TIMER_COUNTER_LOAD_COUNTER \
); \
} while (0)
#define Clock_driver_support_shutdown_hardware() \
do { \
LEON_Mask_interrupt( LEON_INTERRUPT_TIMER1 ); \
LEON_REG.Timer_Control_1 = 0; \
} while (0)
uint32_t bsp_clock_nanoseconds_since_last_tick(void)
{
uint32_t clicks;
clicks = LEON_REG.Timer_Counter_1;
/* Down counter */
return (uint32_t)
(rtems_configuration_get_microseconds_per_tick() - clicks) * 1000;
}
#define Clock_driver_nanoseconds_since_last_tick bsp_clock_nanoseconds_since_last_tick
#include "../../../shared/clockdrv_shell.c"
|