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/*
* 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) 1989-2006.
* On-Line Applications Research Corporation (OAR).
*
* Modified for LEON3 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.
*/
extern rtems_configuration_table Configuration;
#define LEON3_CLOCK_INDEX \
(Configuration.User_multiprocessing_table ? LEON3_Cpu_Index : 0)
volatile LEON3_Timer_Regs_Map *LEON3_Timer_Regs = 0;
static int clkirq;
#define CLOCK_VECTOR LEON_TRAP_TYPE( clkirq )
#define Clock_driver_support_at_tick()
#define Clock_driver_support_find_timer() \
do { \
int i; \
unsigned int iobar, conf; \
\
/* Find GP Timer */ \
i = 0; \
while (i < amba_conf.apbslv.devnr) { \
conf = amba_get_confword(amba_conf.apbslv, i, 0); \
if ((amba_vendor(conf) == VENDOR_GAISLER) && \
(amba_device(conf) == GAISLER_GPTIMER)) { \
iobar = amba_apb_get_membar(amba_conf.apbslv, i); \
LEON3_Timer_Regs = (volatile LEON3_Timer_Regs_Map *) \
amba_iobar_start(amba_conf.apbmst, iobar); \
break; \
} \
i++; \
} \
\
clkirq = (LEON3_Timer_Regs->status & 0xfc) >> 3; \
\
/* MP */ \
if (Configuration.User_multiprocessing_table != NULL) { \
clkirq += LEON3_Cpu_Index; \
} \
} while (0)
#define Clock_driver_support_install_isr( _new, _old ) \
do { \
_old = set_vector( _new, CLOCK_VECTOR, 1 ); \
} while(0)
#define Clock_driver_support_initialize_hardware() \
do { \
LEON3_Timer_Regs->timer[LEON3_CLOCK_INDEX].reload = \
BSP_Configuration.microseconds_per_tick - 1; \
\
LEON3_Timer_Regs->timer[LEON3_CLOCK_INDEX].conf = \
LEON3_GPTIMER_EN | LEON3_GPTIMER_RL | \
LEON3_GPTIMER_LD | LEON3_GPTIMER_IRQEN; \
} while (0)
#define Clock_driver_support_shutdown_hardware() \
do { \
LEON_Mask_interrupt(LEON_TRAP_TYPE(clkirq)); \
LEON3_Timer_Regs->timer[LEON3_CLOCK_INDEX].conf = 0; \
} while (0)
#include "../../../shared/clockdrv_shell.c"
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