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/**
* @file
*
* @ingroup QorIQ
*
* @brief QorIQ clock configuration.
*/
/*
* Copyright (c) 2011, 2016 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#include <rtems/timecounter.h>
#include <libcpu/powerpc-utility.h>
#include <bsp.h>
#include <bsp/qoriq.h>
#include <bsp/irq.h>
/* This is defined in clockdrv_shell.h */
static rtems_isr Clock_isr(void *arg);
static volatile qoriq_pic_global_timer *const qoriq_clock =
#if QORIQ_CLOCK_TIMER < 4
&qoriq.pic.gta [QORIQ_CLOCK_TIMER];
#else
&qoriq.pic.gtb [QORIQ_CLOCK_TIMER - 4];
#endif
static volatile qoriq_pic_global_timer *const qoriq_timecounter =
#if QORIQ_CLOCK_TIMECOUNTER < 4
&qoriq.pic.gta [QORIQ_CLOCK_TIMECOUNTER];
#else
&qoriq.pic.gtb [QORIQ_CLOCK_TIMECOUNTER - 4];
#endif
#define CLOCK_INTERRUPT (QORIQ_IRQ_GT_BASE + QORIQ_CLOCK_TIMER)
static struct timecounter qoriq_clock_tc;
static void qoriq_clock_handler_install(void)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
#if defined(RTEMS_MULTIPROCESSING) && !defined(RTEMS_SMP)
{
Processor_mask affinity;
_Processor_mask_From_index(&affinity, ppc_processor_id());
bsp_interrupt_set_affinity(CLOCK_INTERRUPT, &affinity);
}
#endif
sc = qoriq_pic_set_priority(
CLOCK_INTERRUPT,
QORIQ_PIC_PRIORITY_LOWEST,
NULL
);
if (sc != RTEMS_SUCCESSFUL) {
rtems_fatal_error_occurred(0xdeadbeef);
}
sc = rtems_interrupt_handler_install(
CLOCK_INTERRUPT,
"Clock",
RTEMS_INTERRUPT_UNIQUE,
Clock_isr,
NULL
);
if (sc != RTEMS_SUCCESSFUL) {
rtems_fatal_error_occurred(0xdeadbeef);
}
}
static uint32_t qoriq_clock_get_timecount(struct timecounter *tc)
{
uint32_t ccr = qoriq_timecounter->ccr;
return GTCCR_COUNT_GET(-ccr);
}
static void qoriq_clock_initialize(void)
{
uint32_t timer_frequency = BSP_bus_frequency / 8;
uint32_t interval = (uint32_t) (((uint64_t) timer_frequency
* (uint64_t) rtems_configuration_get_microseconds_per_tick()) / 1000000);
qoriq_clock->bcr = GTBCR_COUNT(interval);
qoriq_timecounter->bcr = GTBCR_COUNT(0xffffffff);
qoriq_clock_tc.tc_get_timecount = qoriq_clock_get_timecount;
qoriq_clock_tc.tc_counter_mask = GTCCR_COUNT_GET(0xffffffff);
qoriq_clock_tc.tc_frequency = timer_frequency;
qoriq_clock_tc.tc_quality = RTEMS_TIMECOUNTER_QUALITY_CLOCK_DRIVER;
rtems_timecounter_install(&qoriq_clock_tc);
}
static void qoriq_clock_cleanup(void)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
qoriq_clock->bcr = GTBCR_CI;
sc = rtems_interrupt_handler_remove(
CLOCK_INTERRUPT,
Clock_isr,
NULL
);
if (sc != RTEMS_SUCCESSFUL) {
rtems_fatal_error_occurred(0xdeadbeef);
}
}
#define Clock_driver_support_initialize_hardware() \
qoriq_clock_initialize()
#define Clock_driver_support_install_isr(clock_isr) \
qoriq_clock_handler_install()
#define Clock_driver_support_set_interrupt_affinity(online_processors) \
bsp_interrupt_set_affinity(CLOCK_INTERRUPT, online_processors)
#define Clock_driver_support_shutdown_hardware() \
qoriq_clock_cleanup()
/* Include shared source clock driver code */
#include "../../../shared/clockdrv_shell.h"
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