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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSBSPsSPARCShared
*
* @brief This header file provides interfaces of a CPU counter implementation
* for SPARC BSPs.
*/
/*
* Copyright (C) 2016, 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.
*/
#ifndef _BSP_SPARC_COUNTER_H
#define _BSP_SPARC_COUNTER_H
#include <rtems/score/cpu.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
struct timecounter;
void _SPARC_Counter_at_tick_clock( void );
CPU_Counter_ticks _SPARC_Counter_read_default( void );
CPU_Counter_ticks _SPARC_Counter_read_clock_isr_disabled( void );
CPU_Counter_ticks _SPARC_Counter_read_clock( void );
uint32_t _SPARC_Get_timecount_clock( struct timecounter * );
typedef CPU_Counter_ticks ( *SPARC_Counter_read )( void );
/*
* The SPARC processors supported by RTEMS have no built-in CPU counter
* support. We have to use some hardware counter module for this purpose, for
* example the GPTIMER instance used by the clock driver. The BSP must provide
* an implementation of the CPU counter read function. This allows the use of
* dynamic hardware enumeration.
*/
typedef struct {
SPARC_Counter_read read_isr_disabled;
SPARC_Counter_read read;
volatile const CPU_Counter_ticks *counter_register;
volatile const uint32_t *pending_register;
uint32_t pending_mask;
CPU_Counter_ticks accumulated;
CPU_Counter_ticks interval;
} SPARC_Counter;
extern SPARC_Counter _SPARC_Counter;
#define SPARC_COUNTER_DEFINITION \
SPARC_Counter _SPARC_Counter = { \
.read_isr_disabled = _SPARC_Counter_read_default, \
.read = _SPARC_Counter_read_default \
}
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* _BSP_SPARC_COUNTER_H */
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