forked from Imagelibrary/rtems
121 lines
3.4 KiB
C
121 lines
3.4 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/**
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* @file
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*
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* @ingroup RTEMSBSPsSPARCLEON3
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*
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* @brief This source file contains the implementation of bsp_start() and
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* definitions of BSP-specific objects.
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*/
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/*
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* COPYRIGHT (c) 2011
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* Aeroflex Gaisler
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*
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* COPYRIGHT (c) 1989-2013.
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* On-Line Applications Research Corporation (OAR).
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*
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* Modified for LEON3 BSP.
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* COPYRIGHT (c) 2004.
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* Gaisler Research.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <bsp.h>
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#include <bsp/irq-generic.h>
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#include <bsp/leon3.h>
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#include <bsp/bootcard.h>
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#include <rtems/sysinit.h>
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#if defined(RTEMS_SMP) || defined(RTEMS_MULTIPROCESSING)
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/* Irq used by shared memory driver and for inter-processor interrupts.
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* Can be overridden by being defined in the application.
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*/
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const unsigned char LEON3_mp_irq __attribute__((weak)) = 14;
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#endif
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/*
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* Tells us if data cache snooping is available
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*/
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int CPU_SPARC_HAS_SNOOPING;
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/* Index of CPU, in an AMP system CPU-index may be non-zero */
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uint32_t LEON3_Cpu_Index = 0;
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/*
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* set_snooping
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*
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* Read the cache control register to determine if
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* bus snooping is available and enabled. This is needed for some
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* drivers so that they can select the most efficient copy routines.
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*
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*/
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static inline int set_snooping(void)
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{
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return (leon3_get_cache_control_register() >> 23) & 1;
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}
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/*
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* bsp_start
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*
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* This routine does the bulk of the system initialization.
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*/
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void bsp_start( void )
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{
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CPU_SPARC_HAS_SNOOPING = set_snooping();
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#ifndef RTEMS_DRVMGR_STARTUP
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bsp_interrupt_initialize();
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#endif
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}
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static void leon3_cpu_index_init(void)
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{
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/* Get the LEON3 CPU index, normally 0, but for MP systems we do
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* _not_ assume that this is CPU0. One may run another OS on CPU0
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* and RTEMS on this CPU, and AMP system with mixed operating
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* systems
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*/
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LEON3_Cpu_Index = _LEON3_Get_current_processor();
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}
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RTEMS_SYSINIT_ITEM(
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leon3_cpu_index_init,
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RTEMS_SYSINIT_BSP_START,
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RTEMS_SYSINIT_ORDER_FIRST
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);
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/*
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* Initialize shared interrupt handling, must be done after IRQ controller has
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* been found and initialized.
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*/
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#ifdef RTEMS_DRVMGR_STARTUP
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RTEMS_SYSINIT_ITEM(
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bsp_interrupt_initialize,
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RTEMS_SYSINIT_DRVMGR_LEVEL_1,
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RTEMS_SYSINIT_ORDER_LAST_BUT_5
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);
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#endif
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