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Diffstat (limited to 'bsps/sparc/include/bsp/sparc-counter.h')
-rw-r--r-- | bsps/sparc/include/bsp/sparc-counter.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/bsps/sparc/include/bsp/sparc-counter.h b/bsps/sparc/include/bsp/sparc-counter.h new file mode 100644 index 0000000000..bc4f2220e7 --- /dev/null +++ b/bsps/sparc/include/bsp/sparc-counter.h @@ -0,0 +1,89 @@ +/* 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 */ |