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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSBSPsSPARCLEON3
*
* @brief This source file contains the Clock Driver implementation.
*/
/*
* COPYRIGHT (c) 1989-2006.
* On-Line Applications Research Corporation (OAR).
*
* Modified for LEON3 BSP.
* COPYRIGHT (c) 2004.
* Gaisler Research.
*
* Copyright (C) 2014, 2023 embedded brains GmbH & Co. KG
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <bsp.h>
#include <bsp/fatal.h>
#include <bsp/irq-generic.h>
#include <bsp/leon3.h>
#include <grlib/irqamp.h>
#include <rtems/score/profiling.h>
#include <rtems/timecounter.h>
/* The LEON3 BSP Timer driver can rely on the Driver Manager if the
* DrvMgr is initialized during startup. Otherwise the classic driver
* must be used.
*
* The DrvMgr Clock driver is located in the shared/timer directory
*/
#ifndef RTEMS_DRVMGR_STARTUP
/* LEON3 Timer system interrupt number */
static int clkirq;
#if defined(RTEMS_PROFILING) && \
(defined(LEON3_HAS_ASR_22_23_UP_COUNTER) || \
defined(LEON3_PROBE_ASR_22_23_UP_COUNTER) || \
defined(LEON3_IRQAMP_PROBE_TIMESTAMP))
#define LEON3_CLOCK_PROBE_IRQAMP_TIMESTAMP
#define IRQMP_TIMESTAMP_S1_S2 ((1U << 25) | (1U << 26))
static void leon3_tc_tick_default(void)
{
rtems_timecounter_tick();
}
static void (*leon3_tc_tick)(void) = leon3_tc_tick_default;
static void leon3_tc_do_tick(void)
{
(*leon3_tc_tick)();
}
static void leon3_tc_tick_irqmp_timestamp(void)
{
irqamp_timestamp *irqmp_ts =
irqamp_get_timestamp_registers(LEON3_IrqCtrl_Regs);
uint32_t first = grlib_load_32(&irqmp_ts->itstmpas);
uint32_t second = grlib_load_32(&irqmp_ts->itcnt);
uint32_t control = grlib_load_32(&irqmp_ts->itstmpc);
control |= IRQMP_TIMESTAMP_S1_S2;
grlib_store_32(&irqmp_ts->itstmpc, control);
_Profiling_Update_max_interrupt_delay(_Per_CPU_Get(), second - first);
rtems_timecounter_tick();
}
static void leon3_tc_tick_irqmp_timestamp_init(void)
{
/*
* Ignore the first clock interrupt, since it contains the sequential system
* initialization time. Do the timestamp initialization on the fly.
*/
#ifdef RTEMS_SMP
static Atomic_Uint counter = ATOMIC_INITIALIZER_UINT(0);
bool done =
_Atomic_Fetch_add_uint(&counter, 1, ATOMIC_ORDER_RELAXED)
== rtems_scheduler_get_processor_maximum() - 1;
#else
bool done = true;
#endif
irqamp_timestamp *irqmp_ts =
irqamp_get_timestamp_registers(LEON3_IrqCtrl_Regs);
uint32_t ks = 1U << 5;
uint32_t control = grlib_load_32(&irqmp_ts->itstmpc);
control = ks | IRQMP_TIMESTAMP_S1_S2 | (unsigned int) clkirq;
grlib_store_32(&irqmp_ts->itstmpc, control);
if (done) {
leon3_tc_tick = leon3_tc_tick_irqmp_timestamp;
}
rtems_timecounter_tick();
}
#else
static void leon3_tc_do_tick(void)
{
rtems_timecounter_tick();
}
#endif
#define Adjust_clkirq_for_node() do { clkirq += LEON3_CLOCK_INDEX; } while(0)
#define Clock_driver_support_find_timer() \
do { \
/* Assume timer found during BSP initialization */ \
if (LEON3_Timer_Regs) { \
clkirq = (grlib_load_32(&LEON3_Timer_Regs->config) & 0xf8) >> 3; \
\
Adjust_clkirq_for_node(); \
} \
} while (0)
#define Clock_driver_support_install_isr(isr) \
bsp_clock_handler_install(isr)
static rtems_interrupt_entry leon3_clock_interrupt_entry;
static void bsp_clock_handler_install(rtems_interrupt_handler isr)
{
rtems_status_code sc;
rtems_interrupt_entry_initialize(
&leon3_clock_interrupt_entry,
isr,
NULL,
"Clock"
);
sc = rtems_interrupt_entry_install(
clkirq,
RTEMS_INTERRUPT_UNIQUE,
&leon3_clock_interrupt_entry
);
if (sc != RTEMS_SUCCESSFUL) {
rtems_fatal(RTEMS_FATAL_SOURCE_BSP, LEON3_FATAL_CLOCK_INITIALIZATION);
}
}
#define Clock_driver_support_set_interrupt_affinity(online_processors) \
bsp_interrupt_set_affinity(clkirq, online_processors)
static void leon3_clock_initialize(void)
{
gptimer_timer *timer;
timer = &LEON3_Timer_Regs->timer[LEON3_CLOCK_INDEX];
grlib_store_32(
&timer->trldval,
rtems_configuration_get_microseconds_per_tick() - 1
);
grlib_store_32(
&timer->tctrl,
GPTIMER_TCTRL_EN | GPTIMER_TCTRL_RS | GPTIMER_TCTRL_LD | GPTIMER_TCTRL_IE
);
#if defined(LEON3_CLOCK_PROBE_IRQAMP_TIMESTAMP)
if (irqamp_get_timestamp_registers(LEON3_IrqCtrl_Regs) != NULL) {
leon3_tc_tick = leon3_tc_tick_irqmp_timestamp_init;
}
#endif
rtems_timecounter_install(&leon3_timecounter_instance.base);
}
#define Clock_driver_support_initialize_hardware() \
leon3_clock_initialize()
#define Clock_driver_timecounter_tick(arg) leon3_tc_do_tick()
#define BSP_FEATURE_IRQ_EXTENSION
#include "../../../shared/dev/clock/clockimpl.h"
#endif /* RTEMS_DRVMGR_STARTUP */
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